Address code review findings

- Fix stale header comments in otel-collector-config.yaml to reflect
  that StatsD receiver is now active (not commented out)
- Don't inflate pass count for skipped hierarchy checks — log as SKIP
  instead of adding a passed CheckResult
- Add comment explaining continue-on-error pattern in CI workflow

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.clang-format

@@ -37,7 +37,7 @@ BinPackParameters: false
 BreakBeforeBinaryOperators: false
 BreakBeforeTernaryOperators: true
 BreakConstructorInitializersBeforeComma: true
-ColumnLimit: 80
+ColumnLimit: 100
 CommentPragmas: "^ IWYU pragma:"
 ConstructorInitializerAllOnOneLineOrOnePerLine: true
 ConstructorInitializerIndentWidth: 4

.clang-tidy

@@ -0,0 +1,202 @@
+---
+Checks: "-*,
+  bugprone-argument-comment,
+  bugprone-assert-side-effect,
+  bugprone-bad-signal-to-kill-thread,
+  bugprone-bool-pointer-implicit-conversion,
+  bugprone-casting-through-void,
+  bugprone-chained-comparison,
+  bugprone-compare-pointer-to-member-virtual-function,
+  bugprone-copy-constructor-init,
+  bugprone-dangling-handle,
+  bugprone-dynamic-static-initializers,
+  bugprone-empty-catch,
+  bugprone-fold-init-type,
+  bugprone-forward-declaration-namespace,
+  bugprone-inaccurate-erase,
+  bugprone-inc-dec-in-conditions,
+  bugprone-incorrect-enable-if,
+  bugprone-incorrect-roundings,
+  bugprone-infinite-loop,
+  bugprone-integer-division,
+  bugprone-lambda-function-name,
+  bugprone-macro-parentheses,
+  bugprone-macro-repeated-side-effects,
+  bugprone-misplaced-operator-in-strlen-in-alloc,
+  bugprone-misplaced-pointer-arithmetic-in-alloc,
+  bugprone-misplaced-widening-cast,
+  bugprone-move-forwarding-reference,
+  bugprone-multi-level-implicit-pointer-conversion,
+  bugprone-multiple-new-in-one-expression,
+  bugprone-multiple-statement-macro,
+  bugprone-no-escape,
+  bugprone-non-zero-enum-to-bool-conversion,
+  bugprone-optional-value-conversion,
+  bugprone-parent-virtual-call,
+  bugprone-pointer-arithmetic-on-polymorphic-object,
+  bugprone-posix-return,
+  bugprone-redundant-branch-condition,
+  bugprone-reserved-identifier,
+  bugprone-return-const-ref-from-parameter,
+  bugprone-shared-ptr-array-mismatch,
+  bugprone-signal-handler,
+  bugprone-signed-char-misuse,
+  bugprone-sizeof-container,
+  bugprone-sizeof-expression,
+  bugprone-spuriously-wake-up-functions,
+  bugprone-standalone-empty,
+  bugprone-string-constructor,
+  bugprone-string-integer-assignment,
+  bugprone-string-literal-with-embedded-nul,
+  bugprone-stringview-nullptr,
+  bugprone-suspicious-enum-usage,
+  bugprone-suspicious-include,
+  bugprone-suspicious-memory-comparison,
+  bugprone-suspicious-memset-usage,
+  bugprone-suspicious-missing-comma,
+  bugprone-suspicious-realloc-usage,
+  bugprone-suspicious-semicolon,
+  bugprone-suspicious-string-compare,
+  bugprone-suspicious-stringview-data-usage,
+  bugprone-swapped-arguments,
+  bugprone-terminating-continue,
+  bugprone-throw-keyword-missing,
+  bugprone-too-small-loop-variable,
+  bugprone-undefined-memory-manipulation,
+  bugprone-undelegated-constructor,
+  bugprone-unhandled-exception-at-new,
+  bugprone-unhandled-self-assignment,
+  bugprone-unique-ptr-array-mismatch,
+  bugprone-unsafe-functions,
+  bugprone-unused-raii,
+  bugprone-unused-local-non-trivial-variable,
+  bugprone-virtual-near-miss,
+  cppcoreguidelines-no-suspend-with-lock,
+  cppcoreguidelines-virtual-class-destructor,
+  hicpp-ignored-remove-result,
+  misc-definitions-in-headers,
+  misc-header-include-cycle,
+  misc-misplaced-const,
+  misc-static-assert,
+  misc-throw-by-value-catch-by-reference,
+  misc-unused-alias-decls,
+  misc-unused-using-decls,
+  readability-duplicate-include,
+  readability-enum-initial-value,
+  readability-misleading-indentation,
+  readability-non-const-parameter,
+  readability-redundant-declaration,
+  readability-reference-to-constructed-temporary,
+  modernize-deprecated-headers,
+  modernize-make-shared,
+  modernize-make-unique,
+  performance-implicit-conversion-in-loop,
+  performance-move-constructor-init,
+  performance-trivially-destructible
+  "
+# ---
+# checks that have some issues that need to be resolved:
+#
+# bugprone-crtp-constructor-accessibility,
+# bugprone-move-forwarding-reference,
+# bugprone-switch-missing-default-case,
+# bugprone-unused-raii,
+# bugprone-unused-return-value,
+# bugprone-use-after-move,
+#
+# cppcoreguidelines-misleading-capture-default-by-value,
+# cppcoreguidelines-init-variables,
+# cppcoreguidelines-pro-type-member-init,
+# cppcoreguidelines-pro-type-static-cast-downcast,
+# cppcoreguidelines-use-default-member-init,
+# cppcoreguidelines-rvalue-reference-param-not-moved,
+#
+# llvm-namespace-comment,
+# misc-const-correctness,
+# misc-include-cleaner,
+# misc-redundant-expression,
+#
+# readability-avoid-nested-conditional-operator,
+# readability-avoid-return-with-void-value,
+# readability-braces-around-statements,
+# readability-container-contains,
+# readability-container-size-empty,
+# readability-convert-member-functions-to-static,
+# readability-const-return-type,
+# readability-else-after-return,
+# readability-implicit-bool-conversion,
+# readability-inconsistent-declaration-parameter-name,
+# readability-identifier-naming,
+# readability-make-member-function-const,
+# readability-math-missing-parentheses,
+# readability-redundant-inline-specifier,
+# readability-redundant-member-init,
+# readability-redundant-casting,
+# readability-redundant-string-init,
+# readability-simplify-boolean-expr,
+# readability-static-definition-in-anonymous-namespace,
+# readability-suspicious-call-argument,
+# readability-use-std-min-max,
+# readability-static-accessed-through-instance,
+#
+# modernize-concat-nested-namespaces,
+# modernize-pass-by-value,
+# modernize-type-traits,
+# modernize-use-designated-initializers,
+# modernize-use-emplace,
+# modernize-use-equals-default,
+# modernize-use-equals-delete,
+# modernize-use-override,
+# modernize-use-ranges,
+# modernize-use-starts-ends-with,
+# modernize-use-std-numbers,
+# modernize-use-using,
+#
+# performance-faster-string-find,
+# performance-for-range-copy,
+# performance-inefficient-vector-operation,
+# performance-move-const-arg,
+# performance-no-automatic-move,
+# ---
+#
+CheckOptions:
+  #   readability-braces-around-statements.ShortStatementLines: 2
+  #   readability-identifier-naming.MacroDefinitionCase: UPPER_CASE
+  #   readability-identifier-naming.ClassCase: CamelCase
+  #   readability-identifier-naming.StructCase: CamelCase
+  #   readability-identifier-naming.UnionCase: CamelCase
+  #   readability-identifier-naming.EnumCase: CamelCase
+  #   readability-identifier-naming.EnumConstantCase: CamelCase
+  #   readability-identifier-naming.ScopedEnumConstantCase: CamelCase
+  #   readability-identifier-naming.GlobalConstantCase: UPPER_CASE
+  #   readability-identifier-naming.GlobalConstantPrefix: "k"
+  #   readability-identifier-naming.GlobalVariableCase: CamelCase
+  #   readability-identifier-naming.GlobalVariablePrefix: "g"
+  #   readability-identifier-naming.ConstexprFunctionCase: camelBack
+  #   readability-identifier-naming.ConstexprMethodCase: camelBack
+  #   readability-identifier-naming.ClassMethodCase: camelBack
+  #   readability-identifier-naming.ClassMemberCase: camelBack
+  #   readability-identifier-naming.ClassConstantCase: UPPER_CASE
+  #   readability-identifier-naming.ClassConstantPrefix: "k"
+  #   readability-identifier-naming.StaticConstantCase: UPPER_CASE
+  #   readability-identifier-naming.StaticConstantPrefix: "k"
+  #   readability-identifier-naming.StaticVariableCase: UPPER_CASE
+  #   readability-identifier-naming.StaticVariablePrefix: "k"
+  #   readability-identifier-naming.ConstexprVariableCase: UPPER_CASE
+  #   readability-identifier-naming.ConstexprVariablePrefix: "k"
+  #   readability-identifier-naming.LocalConstantCase: camelBack
+  #   readability-identifier-naming.LocalVariableCase: camelBack
+  #   readability-identifier-naming.TemplateParameterCase: CamelCase
+  #   readability-identifier-naming.ParameterCase: camelBack
+  #   readability-identifier-naming.FunctionCase: camelBack
+  #   readability-identifier-naming.MemberCase: camelBack
+  #   readability-identifier-naming.PrivateMemberSuffix: _
+  #   readability-identifier-naming.ProtectedMemberSuffix: _
+  #   readability-identifier-naming.PublicMemberSuffix: ""
+  #   readability-identifier-naming.FunctionIgnoredRegexp: ".*tag_invoke.*"
+  bugprone-unsafe-functions.ReportMoreUnsafeFunctions: true
+#   bugprone-unused-return-value.CheckedReturnTypes: ::std::error_code;::std::error_condition;::std::errc
+#   misc-include-cleaner.IgnoreHeaders: '.*/(detail|impl)/.*;.*(expected|unexpected).*;.*ranges_lower_bound\.h;time.h;stdlib.h;__chrono/.*;fmt/chrono.h;boost/uuid/uuid_hash.hpp'
+#
+# HeaderFilterRegex: '^.*/(src|tests)/.*\.(h|hpp)$'
+WarningsAsErrors: "*"

.codecov.yml

@@ -36,3 +36,8 @@ ignore:
   - "src/tests/"
   - "include/xrpl/beast/test/"
   - "include/xrpl/beast/unit_test/"
+  # Telemetry modules — conditionally compiled behind XRPL_ENABLE_TELEMETRY,
+  # which is not enabled in coverage builds.
+  - "src/xrpld/telemetry/"
+  - "src/libxrpl/beast/insight/OTelCollector.cpp"
+  - "include/xrpl/beast/insight/OTelCollector.h"

.gersemi/definitions.cmake

@@ -0,0 +1,98 @@
+# Custom CMake command definitions for gersemi formatting.
+# These stubs teach gersemi the signatures of project-specific commands
+# so it can format their invocations correctly.
+
+function(git_branch branch_val)
+endfunction()
+
+function(isolate_headers target A B scope)
+endfunction()
+
+function(create_symbolic_link target link)
+endfunction()
+
+function(xrpl_add_test name)
+endfunction()
+
+macro(exclude_from_default target_)
+endmacro()
+
+macro(exclude_if_included target_)
+endmacro()
+
+function(target_protobuf_sources target prefix)
+    set(options APPEND_PATH DESCRIPTORS)
+    set(oneValueArgs
+        LANGUAGE
+        OUT_VAR
+        EXPORT_MACRO
+        TARGET
+        PROTOC_OUT_DIR
+        PLUGIN
+        PLUGIN_OPTIONS
+        PROTOC_EXE
+    )
+    set(multiValueArgs
+        PROTOS
+        IMPORT_DIRS
+        GENERATE_EXTENSIONS
+        PROTOC_OPTIONS
+        DEPENDENCIES
+    )
+    cmake_parse_arguments(
+        THIS_FUNCTION_PREFIX
+        "${options}"
+        "${oneValueArgs}"
+        "${multiValueArgs}"
+        ${ARGN}
+    )
+endfunction()
+
+function(add_module parent name)
+endfunction()
+
+function(target_link_modules parent scope)
+endfunction()
+
+function(setup_target_for_coverage_gcovr)
+    set(options NONE)
+    set(oneValueArgs BASE_DIRECTORY NAME FORMAT)
+    set(multiValueArgs EXCLUDE EXECUTABLE EXECUTABLE_ARGS DEPENDENCIES)
+    cmake_parse_arguments(
+        THIS_FUNCTION_PREFIX
+        "${options}"
+        "${oneValueArgs}"
+        "${multiValueArgs}"
+        ${ARGN}
+    )
+endfunction()
+
+function(add_code_coverage_to_target name scope)
+endfunction()
+
+function(verbose_find_path variable name)
+    set(options
+        NO_CACHE
+        REQUIRED
+        OPTIONAL
+        NO_DEFAULT_PATH
+        NO_PACKAGE_ROOT_PATH
+        NO_CMAKE_PATH
+        NO_CMAKE_ENVIRONMENT_PATH
+        NO_SYSTEM_ENVIRONMENT_PATH
+        NO_CMAKE_SYSTEM_PATH
+        NO_CMAKE_INSTALL_PREFIX
+        CMAKE_FIND_ROOT_PATH_BOTH
+        ONLY_CMAKE_FIND_ROOT_PATH
+        NO_CMAKE_FIND_ROOT_PATH
+    )
+    set(oneValueArgs REGISTRY_VIEW VALIDATOR DOC)
+    set(multiValueArgs NAMES HINTS PATHS PATH_SUFFIXES)
+    cmake_parse_arguments(
+        THIS_FUNCTION_PREFIX
+        "${options}"
+        "${oneValueArgs}"
+        "${multiValueArgs}"
+        ${ARGN}
+    )
+endfunction()

.gersemirc

@@ -0,0 +1 @@
+definitions: [.gersemi]

.github/CODEOWNERS

@@ -1,8 +0,0 @@
-# Allow anyone to review any change by default.
-*
-
-# Require the rpc-reviewers team to review changes to the rpc code.
-include/xrpl/protocol/ @xrplf/rpc-reviewers
-src/libxrpl/protocol/ @xrplf/rpc-reviewers
-src/xrpld/rpc/ @xrplf/rpc-reviewers
-src/xrpld/app/misc/ @xrplf/rpc-reviewers

.github/actions/generate-version/action.yml

@@ -17,8 +17,10 @@ runs:
         VERSION: ${{ github.ref_name }}
       run: echo "VERSION=${VERSION}" >> "${GITHUB_ENV}"
 
-    # When a tag is not pushed, then the version is extracted from the
-    # BuildInfo.cpp file and the shortened commit hash appended to it.
+    # When a tag is not pushed, then the version (e.g. 1.2.3-b0) is extracted
+    # from the BuildInfo.cpp file and the shortened commit hash appended to it.
+    # We use a plus sign instead of a hyphen because Conan recipe versions do
+    # not support two hyphens.
     - name: Generate version for non-tag event
       if: ${{ github.event_name != 'tag' }}
       shell: bash
@@ -32,7 +34,7 @@ runs:
 
         echo 'Appending shortened commit hash to version.'
         SHA='${{ github.sha }}'
-        VERSION="${VERSION}-${SHA:0:7}"
+        VERSION="${VERSION}+${SHA:0:7}"
 
         echo "VERSION=${VERSION}" >> "${GITHUB_ENV}"
 

.github/actions/setup-conan/action.yml

@@ -31,7 +31,7 @@ runs:
         conan config install conan/profiles/ -tf $(conan config home)/profiles/
 
         echo 'Conan profile:'
-        conan profile show
+        conan profile show --profile ci
 
     - name: Set up Conan remote
       shell: bash

.github/dependabot.yml

@@ -0,0 +1,56 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+      day: monday
+      time: "04:00"
+      timezone: Etc/GMT
+    commit-message:
+      prefix: "ci: [DEPENDABOT] "
+    target-branch: develop
+
+  - package-ecosystem: github-actions
+    directory: .github/actions/build-deps/
+    schedule:
+      interval: weekly
+      day: monday
+      time: "04:00"
+      timezone: Etc/GMT
+    commit-message:
+      prefix: "ci: [DEPENDABOT] "
+    target-branch: develop
+
+  - package-ecosystem: github-actions
+    directory: .github/actions/generate-version/
+    schedule:
+      interval: weekly
+      day: monday
+      time: "04:00"
+      timezone: Etc/GMT
+    commit-message:
+      prefix: "ci: [DEPENDABOT] "
+    target-branch: develop
+
+  - package-ecosystem: github-actions
+    directory: .github/actions/print-env/
+    schedule:
+      interval: weekly
+      day: monday
+      time: "04:00"
+      timezone: Etc/GMT
+    commit-message:
+      prefix: "ci: [DEPENDABOT] "
+    target-branch: develop
+
+  - package-ecosystem: github-actions
+    directory: .github/actions/setup-conan/
+    schedule:
+      interval: weekly
+      day: monday
+      time: "04:00"
+      timezone: Etc/GMT
+    commit-message:
+      prefix: "ci: [DEPENDABOT] "
+    target-branch: develop

.github/scripts/levelization/results/loops.txt

@@ -4,14 +4,11 @@ Loop: test.jtx test.toplevel
 Loop: test.jtx test.unit_test
   test.unit_test == test.jtx
 
-Loop: xrpld.app xrpld.core
-  xrpld.app > xrpld.core
-
 Loop: xrpld.app xrpld.overlay
-  xrpld.overlay > xrpld.app
+  xrpld.overlay ~= xrpld.app
 
 Loop: xrpld.app xrpld.peerfinder
-  xrpld.peerfinder ~= xrpld.app
+  xrpld.peerfinder == xrpld.app
 
 Loop: xrpld.app xrpld.rpc
   xrpld.rpc > xrpld.app
@@ -19,6 +16,9 @@ Loop: xrpld.app xrpld.rpc
 Loop: xrpld.app xrpld.shamap
   xrpld.shamap ~= xrpld.app
 
+Loop: xrpld.app xrpld.telemetry
+  xrpld.telemetry ~= xrpld.app
+
 Loop: xrpld.overlay xrpld.rpc
   xrpld.rpc ~= xrpld.overlay
 

.github/scripts/levelization/results/ordering.txt

@@ -1,4 +1,6 @@
 libxrpl.basics > xrpl.basics
+libxrpl.conditions > xrpl.basics
+libxrpl.conditions > xrpl.conditions
 libxrpl.core > xrpl.basics
 libxrpl.core > xrpl.core
 libxrpl.crypto > xrpl.basics
@@ -17,16 +19,29 @@ libxrpl.nodestore > xrpl.protocol
 libxrpl.protocol > xrpl.basics
 libxrpl.protocol > xrpl.json
 libxrpl.protocol > xrpl.protocol
+libxrpl.rdb > xrpl.basics
+libxrpl.rdb > xrpl.rdb
 libxrpl.resource > xrpl.basics
 libxrpl.resource > xrpl.json
 libxrpl.resource > xrpl.resource
 libxrpl.server > xrpl.basics
 libxrpl.server > xrpl.json
 libxrpl.server > xrpl.protocol
+libxrpl.server > xrpl.rdb
 libxrpl.server > xrpl.server
 libxrpl.shamap > xrpl.basics
 libxrpl.shamap > xrpl.protocol
 libxrpl.shamap > xrpl.shamap
+libxrpl.telemetry > xrpl.basics
+libxrpl.telemetry > xrpl.telemetry
+libxrpl.tx > xrpl.basics
+libxrpl.tx > xrpl.conditions
+libxrpl.tx > xrpl.core
+libxrpl.tx > xrpl.json
+libxrpl.tx > xrpl.ledger
+libxrpl.tx > xrpl.protocol
+libxrpl.tx > xrpl.server
+libxrpl.tx > xrpl.tx
 test.app > test.jtx
 test.app > test.rpc
 test.app > test.toplevel
@@ -41,7 +56,10 @@ test.app > xrpl.json
 test.app > xrpl.ledger
 test.app > xrpl.nodestore
 test.app > xrpl.protocol
+test.app > xrpl.rdb
 test.app > xrpl.resource
+test.app > xrpl.server
+test.app > xrpl.tx
 test.basics > test.jtx
 test.basics > test.unit_test
 test.basics > xrpl.basics
@@ -51,7 +69,7 @@ test.basics > xrpl.json
 test.basics > xrpl.protocol
 test.beast > xrpl.basics
 test.conditions > xrpl.basics
-test.conditions > xrpld.conditions
+test.conditions > xrpl.conditions
 test.consensus > test.csf
 test.consensus > test.toplevel
 test.consensus > test.unit_test
@@ -60,6 +78,7 @@ test.consensus > xrpld.app
 test.consensus > xrpld.consensus
 test.consensus > xrpl.json
 test.consensus > xrpl.ledger
+test.consensus > xrpl.tx
 test.core > test.jtx
 test.core > test.toplevel
 test.core > test.unit_test
@@ -67,14 +86,17 @@ test.core > xrpl.basics
 test.core > xrpl.core
 test.core > xrpld.core
 test.core > xrpl.json
+test.core > xrpl.rdb
 test.core > xrpl.server
 test.csf > xrpl.basics
 test.csf > xrpld.consensus
 test.csf > xrpl.json
 test.csf > xrpl.protocol
+test.csf > xrpl.telemetry
 test.json > test.jtx
 test.json > xrpl.json
 test.jtx > xrpl.basics
+test.jtx > xrpl.core
 test.jtx > xrpld.app
 test.jtx > xrpld.core
 test.jtx > xrpld.rpc
@@ -84,6 +106,7 @@ test.jtx > xrpl.net
 test.jtx > xrpl.protocol
 test.jtx > xrpl.resource
 test.jtx > xrpl.server
+test.jtx > xrpl.tx
 test.ledger > test.jtx
 test.ledger > test.toplevel
 test.ledger > xrpl.basics
@@ -95,8 +118,8 @@ test.nodestore > test.jtx
 test.nodestore > test.toplevel
 test.nodestore > test.unit_test
 test.nodestore > xrpl.basics
-test.nodestore > xrpld.core
 test.nodestore > xrpl.nodestore
+test.nodestore > xrpl.rdb
 test.overlay > test.jtx
 test.overlay > test.toplevel
 test.overlay > test.unit_test
@@ -129,8 +152,11 @@ test.rpc > xrpld.core
 test.rpc > xrpld.overlay
 test.rpc > xrpld.rpc
 test.rpc > xrpl.json
+test.rpc > xrpl.ledger
 test.rpc > xrpl.protocol
 test.rpc > xrpl.resource
+test.rpc > xrpl.server
+test.rpc > xrpl.tx
 test.server > test.jtx
 test.server > test.toplevel
 test.server > test.unit_test
@@ -149,72 +175,111 @@ test.toplevel > test.csf
 test.toplevel > xrpl.json
 test.unit_test > xrpl.basics
 tests.libxrpl > xrpl.basics
+tests.libxrpl > xrpl.core
+tests.libxrpl > xrpld.telemetry
 tests.libxrpl > xrpl.json
 tests.libxrpl > xrpl.net
+tests.libxrpl > xrpl.telemetry
+xrpl.conditions > xrpl.basics
+xrpl.conditions > xrpl.protocol
 xrpl.core > xrpl.basics
 xrpl.core > xrpl.json
+xrpl.core > xrpl.ledger
+xrpl.core > xrpl.protocol
 xrpl.json > xrpl.basics
 xrpl.ledger > xrpl.basics
 xrpl.ledger > xrpl.protocol
+xrpl.ledger > xrpl.server
+xrpl.ledger > xrpl.shamap
 xrpl.net > xrpl.basics
 xrpl.nodestore > xrpl.basics
 xrpl.nodestore > xrpl.protocol
 xrpl.protocol > xrpl.basics
 xrpl.protocol > xrpl.json
+xrpl.rdb > xrpl.basics
+xrpl.rdb > xrpl.core
+xrpl.rdb > xrpl.protocol
 xrpl.resource > xrpl.basics
 xrpl.resource > xrpl.json
 xrpl.resource > xrpl.protocol
 xrpl.server > xrpl.basics
+xrpl.server > xrpl.core
 xrpl.server > xrpl.json
 xrpl.server > xrpl.protocol
+xrpl.server > xrpl.rdb
+xrpl.server > xrpl.resource
+xrpl.server > xrpl.shamap
 xrpl.shamap > xrpl.basics
 xrpl.shamap > xrpl.nodestore
 xrpl.shamap > xrpl.protocol
+xrpl.telemetry > xrpl.basics
+xrpl.tx > xrpl.basics
+xrpl.tx > xrpl.core
+xrpl.tx > xrpl.ledger
+xrpl.tx > xrpl.protocol
 xrpld.app > test.unit_test
 xrpld.app > xrpl.basics
 xrpld.app > xrpl.core
-xrpld.app > xrpld.conditions
 xrpld.app > xrpld.consensus
+xrpld.app > xrpld.core
 xrpld.app > xrpl.json
 xrpld.app > xrpl.ledger
 xrpld.app > xrpl.net
 xrpld.app > xrpl.nodestore
 xrpld.app > xrpl.protocol
+xrpld.app > xrpl.rdb
 xrpld.app > xrpl.resource
+xrpld.app > xrpl.server
 xrpld.app > xrpl.shamap
-xrpld.conditions > xrpl.basics
-xrpld.conditions > xrpl.protocol
+xrpld.app > xrpl.telemetry
+xrpld.app > xrpl.tx
 xrpld.consensus > xrpl.basics
+xrpld.consensus > xrpld.telemetry
 xrpld.consensus > xrpl.json
 xrpld.consensus > xrpl.protocol
+xrpld.consensus > xrpl.telemetry
 xrpld.core > xrpl.basics
 xrpld.core > xrpl.core
 xrpld.core > xrpl.json
 xrpld.core > xrpl.net
 xrpld.core > xrpl.protocol
+xrpld.core > xrpl.rdb
 xrpld.overlay > xrpl.basics
 xrpld.overlay > xrpl.core
 xrpld.overlay > xrpld.core
 xrpld.overlay > xrpld.peerfinder
+xrpld.overlay > xrpld.telemetry
 xrpld.overlay > xrpl.json
 xrpld.overlay > xrpl.protocol
+xrpld.overlay > xrpl.rdb
 xrpld.overlay > xrpl.resource
 xrpld.overlay > xrpl.server
+xrpld.overlay > xrpl.tx
 xrpld.peerfinder > xrpl.basics
 xrpld.peerfinder > xrpld.core
 xrpld.peerfinder > xrpl.protocol
+xrpld.peerfinder > xrpl.rdb
 xrpld.perflog > xrpl.basics
 xrpld.perflog > xrpl.core
 xrpld.perflog > xrpld.rpc
+xrpld.perflog > xrpld.telemetry
 xrpld.perflog > xrpl.json
 xrpld.rpc > xrpl.basics
 xrpld.rpc > xrpl.core
 xrpld.rpc > xrpld.core
+xrpld.rpc > xrpld.telemetry
 xrpld.rpc > xrpl.json
 xrpld.rpc > xrpl.ledger
 xrpld.rpc > xrpl.net
 xrpld.rpc > xrpl.nodestore
 xrpld.rpc > xrpl.protocol
+xrpld.rpc > xrpl.rdb
 xrpld.rpc > xrpl.resource
 xrpld.rpc > xrpl.server
+xrpld.rpc > xrpl.tx
 xrpld.shamap > xrpl.shamap
+xrpld.telemetry > xrpl.basics
+xrpld.telemetry > xrpl.core
+xrpld.telemetry > xrpl.nodestore
+xrpld.telemetry > xrpl.server
+xrpld.telemetry > xrpl.telemetry

.github/scripts/rename/include.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# Exit the script as soon as an error occurs.
+set -e
+
+# This script checks whether there are no new include guards introduced by a new
+# PR, as header files should use "#pragma once" instead. The script assumes any
+# include guards will use "XRPL_" as prefix.
+# Usage: .github/scripts/rename/include.sh <repository directory>
+
+if [ "$#" -ne 1 ]; then
+    echo "Usage: $0 <repository directory>"
+    exit 1
+fi
+
+DIRECTORY=$1
+echo "Processing directory: ${DIRECTORY}"
+if [ ! -d "${DIRECTORY}" ]; then
+    echo "Error: Directory '${DIRECTORY}' does not exist."
+    exit 1
+fi
+
+find "${DIRECTORY}" -type f \( -name "*.h" -o -name "*.hpp" -o -name "*.ipp" \) | while read -r FILE; do
+    echo "Processing file: ${FILE}"
+    if grep -q "#ifndef XRPL_" "${FILE}"; then
+      echo "Please replace all include guards by #pragma once."
+      exit 1
+    fi
+done
+echo "Checking complete."

.github/scripts/strategy-matrix/generate.py

@@ -51,22 +51,20 @@ def generate_strategy_matrix(all: bool, config: Config) -> list:
         # Only generate a subset of configurations in PRs.
         if not all:
             # Debian:
-            # - Bookworm using GCC 13: Release and Unity on linux/amd64, set
-            #   the reference fee to 500.
-            # - Bookworm using GCC 15: Debug and no Unity on linux/amd64, enable
-            #   code coverage (which will be done below).
-            # - Bookworm using Clang 16: Debug and no Unity on linux/arm64,
-            #   enable voidstar.
-            # - Bookworm using Clang 17: Release and no Unity on linux/amd64,
-            #   set the reference fee to 1000.
-            # - Bookworm using Clang 20: Debug and Unity on linux/amd64.
+            # - Bookworm using GCC 13: Release on linux/amd64, set the reference
+            #   fee to 500.
+            # - Bookworm using GCC 15: Debug on linux/amd64, enable code
+            #   coverage (which will be done below).
+            # - Bookworm using Clang 16: Debug on linux/amd64, enable voidstar.
+            # - Bookworm using Clang 17: Release on linux/amd64, set the
+            #   reference fee to 1000.
+            # - Bookworm using Clang 20: Debug on linux/amd64.
             if os["distro_name"] == "debian":
                 skip = True
                 if os["distro_version"] == "bookworm":
                     if (
                         f"{os['compiler_name']}-{os['compiler_version']}" == "gcc-13"
                         and build_type == "Release"
-                        and "-Dunity=ON" in cmake_args
                         and architecture["platform"] == "linux/amd64"
                     ):
                         cmake_args = f"-DUNIT_TEST_REFERENCE_FEE=500 {cmake_args}"
@@ -74,22 +72,19 @@ def generate_strategy_matrix(all: bool, config: Config) -> list:
                     if (
                         f"{os['compiler_name']}-{os['compiler_version']}" == "gcc-15"
                         and build_type == "Debug"
-                        and "-Dunity=OFF" in cmake_args
                         and architecture["platform"] == "linux/amd64"
                     ):
                         skip = False
                     if (
                         f"{os['compiler_name']}-{os['compiler_version']}" == "clang-16"
                         and build_type == "Debug"
-                        and "-Dunity=OFF" in cmake_args
-                        and architecture["platform"] == "linux/arm64"
+                        and architecture["platform"] == "linux/amd64"
                     ):
                         cmake_args = f"-Dvoidstar=ON {cmake_args}"
                         skip = False
                     if (
                         f"{os['compiler_name']}-{os['compiler_version']}" == "clang-17"
                         and build_type == "Release"
-                        and "-Dunity=ON" in cmake_args
                         and architecture["platform"] == "linux/amd64"
                     ):
                         cmake_args = f"-DUNIT_TEST_REFERENCE_FEE=1000 {cmake_args}"
@@ -97,7 +92,6 @@ def generate_strategy_matrix(all: bool, config: Config) -> list:
                     if (
                         f"{os['compiler_name']}-{os['compiler_version']}" == "clang-20"
                         and build_type == "Debug"
-                        and "-Dunity=ON" in cmake_args
                         and architecture["platform"] == "linux/amd64"
                     ):
                         skip = False
@@ -105,15 +99,14 @@ def generate_strategy_matrix(all: bool, config: Config) -> list:
                     continue
 
             # RHEL:
-            # - 9 using GCC 12: Debug and Unity on linux/amd64.
-            # - 10 using Clang: Release and no Unity on linux/amd64.
+            # - 9 using GCC 12: Debug on linux/amd64.
+            # - 10 using Clang: Release on linux/amd64.
             if os["distro_name"] == "rhel":
                 skip = True
                 if os["distro_version"] == "9":
                     if (
                         f"{os['compiler_name']}-{os['compiler_version']}" == "gcc-12"
                         and build_type == "Debug"
-                        and "-Dunity=ON" in cmake_args
                         and architecture["platform"] == "linux/amd64"
                     ):
                         skip = False
@@ -121,7 +114,6 @@ def generate_strategy_matrix(all: bool, config: Config) -> list:
                     if (
                         f"{os['compiler_name']}-{os['compiler_version']}" == "clang-any"
                         and build_type == "Release"
-                        and "-Dunity=OFF" in cmake_args
                         and architecture["platform"] == "linux/amd64"
                     ):
                         skip = False
@@ -129,17 +121,16 @@ def generate_strategy_matrix(all: bool, config: Config) -> list:
                     continue
 
             # Ubuntu:
-            # - Jammy using GCC 12: Debug and no Unity on linux/arm64.
-            # - Noble using GCC 14: Release and Unity on linux/amd64.
-            # - Noble using Clang 18: Debug and no Unity on linux/amd64.
-            # - Noble using Clang 19: Release and Unity on linux/arm64.
+            # - Jammy using GCC 12: Debug on linux/arm64.
+            # - Noble using GCC 14: Release on linux/amd64.
+            # - Noble using Clang 18: Debug on linux/amd64.
+            # - Noble using Clang 19: Release on linux/arm64.
             if os["distro_name"] == "ubuntu":
                 skip = True
                 if os["distro_version"] == "jammy":
                     if (
                         f"{os['compiler_name']}-{os['compiler_version']}" == "gcc-12"
                         and build_type == "Debug"
-                        and "-Dunity=OFF" in cmake_args
                         and architecture["platform"] == "linux/arm64"
                     ):
                         skip = False
@@ -147,21 +138,18 @@ def generate_strategy_matrix(all: bool, config: Config) -> list:
                     if (
                         f"{os['compiler_name']}-{os['compiler_version']}" == "gcc-14"
                         and build_type == "Release"
-                        and "-Dunity=ON" in cmake_args
                         and architecture["platform"] == "linux/amd64"
                     ):
                         skip = False
                     if (
                         f"{os['compiler_name']}-{os['compiler_version']}" == "clang-18"
                         and build_type == "Debug"
-                        and "-Dunity=OFF" in cmake_args
                         and architecture["platform"] == "linux/amd64"
                     ):
                         skip = False
                     if (
                         f"{os['compiler_name']}-{os['compiler_version']}" == "clang-19"
                         and build_type == "Release"
-                        and "-Dunity=ON" in cmake_args
                         and architecture["platform"] == "linux/arm64"
                     ):
                         skip = False
@@ -169,20 +157,16 @@ def generate_strategy_matrix(all: bool, config: Config) -> list:
                     continue
 
             # MacOS:
-            # - Debug and no Unity on macos/arm64.
+            # - Debug on macos/arm64.
             if os["distro_name"] == "macos" and not (
-                build_type == "Debug"
-                and "-Dunity=OFF" in cmake_args
-                and architecture["platform"] == "macos/arm64"
+                build_type == "Debug" and architecture["platform"] == "macos/arm64"
             ):
                 continue
 
             # Windows:
-            # - Release and Unity on windows/amd64.
+            # - Release on windows/amd64.
             if os["distro_name"] == "windows" and not (
-                build_type == "Release"
-                and "-Dunity=ON" in cmake_args
-                and architecture["platform"] == "windows/amd64"
+                build_type == "Release" and architecture["platform"] == "windows/amd64"
             ):
                 continue
 
@@ -209,18 +193,28 @@ def generate_strategy_matrix(all: bool, config: Config) -> list:
         ):
             continue
 
-        # Enable code coverage for Debian Bookworm using GCC 15 in Debug and no
-        # Unity on linux/amd64
+        # Enable code coverage for Debian Bookworm using GCC 15 in Debug on
+        # linux/amd64
         if (
-            f"{os['compiler_name']}-{os['compiler_version']}" == "gcc-15"
+            f"{os['distro_name']}-{os['distro_version']}" == "debian-bookworm"
+            and f"{os['compiler_name']}-{os['compiler_version']}" == "gcc-15"
             and build_type == "Debug"
-            and "-Dunity=OFF" in cmake_args
             and architecture["platform"] == "linux/amd64"
         ):
-            cmake_args = f"-Dcoverage=ON -Dcoverage_format=xml -DCODE_COVERAGE_VERBOSE=ON -DCMAKE_C_FLAGS=-O0 -DCMAKE_CXX_FLAGS=-O0 {cmake_args}"
+            cmake_args = f"{cmake_args} -Dcoverage=ON -Dcoverage_format=xml -DCODE_COVERAGE_VERBOSE=ON -DCMAKE_C_FLAGS=-O0 -DCMAKE_CXX_FLAGS=-O0"
+
+        # Enable unity build for Ubuntu Jammy using GCC 12 in Debug on
+        # linux/amd64.
+        if (
+            f"{os['distro_name']}-{os['distro_version']}" == "ubuntu-jammy"
+            and f"{os['compiler_name']}-{os['compiler_version']}" == "gcc-12"
+            and build_type == "Debug"
+            and architecture["platform"] == "linux/amd64"
+        ):
+            cmake_args = f"{cmake_args} -Dunity=ON"
 
         # Generate a unique name for the configuration, e.g. macos-arm64-debug
-        # or debian-bookworm-gcc-12-amd64-release-unity.
+        # or debian-bookworm-gcc-12-amd64-release.
         config_name = os["distro_name"]
         if (n := os["distro_version"]) != "":
             config_name += f"-{n}"

.github/scripts/strategy-matrix/linux.json

@@ -208,5 +208,5 @@
     }
   ],
   "build_type": ["Debug", "Release"],
-  "cmake_args": ["-Dunity=OFF", "-Dunity=ON"]
+  "cmake_args": [""]
 }

.github/scripts/strategy-matrix/macos.json

@@ -15,8 +15,5 @@
     }
   ],
   "build_type": ["Debug", "Release"],
-  "cmake_args": [
-    "-Dunity=OFF -DCMAKE_POLICY_VERSION_MINIMUM=3.5",
-    "-Dunity=ON -DCMAKE_POLICY_VERSION_MINIMUM=3.5"
-  ]
+  "cmake_args": ["-DCMAKE_POLICY_VERSION_MINIMUM=3.5"]
 }

.github/scripts/strategy-matrix/windows.json

@@ -15,5 +15,5 @@
     }
   ],
   "build_type": ["Debug", "Release"],
-  "cmake_args": ["-Dunity=OFF", "-Dunity=ON"]
+  "cmake_args": [""]
 }

.github/workflows/check-pr-title.yml

@@ -0,0 +1,10 @@
+name: Check PR title
+
+on:
+  pull_request:
+    types: [opened, edited, reopened, synchronize]
+    branches: [develop]
+
+jobs:
+  check_title:
+    uses: XRPLF/actions/.github/workflows/check-pr-title.yml@943eb8277e8f4b010fde0c826ce4154c36c39509

.github/workflows/on-pr.yml

@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Determine changed files
         # This step checks whether any files have changed that should
         # cause the next jobs to run. We do it this way rather than
@@ -46,7 +46,7 @@ jobs:
         # that Github considers any skipped jobs to have passed, and in
         # turn the required checks as well.
         id: changes
-        uses: tj-actions/changed-files@ed68ef82c095e0d48ec87eccea555d944a631a4c # v46.0.5
+        uses: tj-actions/changed-files@22103cc46bda19c2b464ffe86db46df6922fd323 # v47.0.5
         with:
           files: |
             # These paths are unique to `on-pr.yml`.
@@ -59,14 +59,18 @@ jobs:
             # Keep the paths below in sync with those in `on-trigger.yml`.
             .github/actions/build-deps/**
             .github/actions/build-test/**
+            .github/actions/generate-version/**
             .github/actions/setup-conan/**
             .github/scripts/strategy-matrix/**
             .github/workflows/reusable-build.yml
             .github/workflows/reusable-build-test-config.yml
             .github/workflows/reusable-build-test.yml
+            .github/workflows/reusable-clang-tidy.yml
+            .github/workflows/reusable-clang-tidy-files.yml
             .github/workflows/reusable-strategy-matrix.yml
             .github/workflows/reusable-test.yml
             .github/workflows/reusable-upload-recipe.yml
+            .clang-tidy
             .codecov.yml
             cmake/**
             conan/**
@@ -106,6 +110,17 @@ jobs:
     if: ${{ needs.should-run.outputs.go == 'true' }}
     uses: ./.github/workflows/reusable-check-rename.yml
 
+  clang-tidy:
+    needs: should-run
+    if: ${{ needs.should-run.outputs.go == 'true' }}
+    uses: ./.github/workflows/reusable-clang-tidy.yml
+    permissions:
+      issues: write
+      contents: read
+    with:
+      check_only_changed: true
+      create_issue_on_failure: false
+
   build-test:
     needs: should-run
     if: ${{ needs.should-run.outputs.go == 'true' }}
@@ -126,9 +141,8 @@ jobs:
     needs:
       - should-run
       - build-test
-    # Only run when committing to a PR that targets a release branch in the
-    # XRPLF repository.
-    if: ${{ github.repository_owner == 'XRPLF' && needs.should-run.outputs.go == 'true' && startsWith(github.ref, 'refs/heads/release') }}
+    # Only run when committing to a PR that targets a release branch.
+    if: ${{ github.repository == 'XRPLF/rippled' && needs.should-run.outputs.go == 'true' && github.event_name == 'pull_request' && startsWith(github.event.pull_request.base.ref, 'release') }}
     uses: ./.github/workflows/reusable-upload-recipe.yml
     secrets:
       remote_username: ${{ secrets.CONAN_REMOTE_USERNAME }}
@@ -155,6 +169,7 @@ jobs:
     needs:
       - check-levelization
       - check-rename
+      - clang-tidy
       - build-test
       - upload-recipe
       - notify-clio

.github/workflows/on-tag.yml

@@ -17,8 +17,7 @@ defaults:
 
 jobs:
   upload-recipe:
-    # Only run when a tag is pushed to the XRPLF repository.
-    if: ${{ github.repository_owner == 'XRPLF' }}
+    if: ${{ github.repository == 'XRPLF/rippled' }}
     uses: ./.github/workflows/reusable-upload-recipe.yml
     secrets:
       remote_username: ${{ secrets.CONAN_REMOTE_USERNAME }}

.github/workflows/on-trigger.yml

@@ -16,14 +16,18 @@ on:
       # Keep the paths below in sync with those in `on-pr.yml`.
       - ".github/actions/build-deps/**"
       - ".github/actions/build-test/**"
+      - ".github/actions/generate-version/**"
       - ".github/actions/setup-conan/**"
       - ".github/scripts/strategy-matrix/**"
       - ".github/workflows/reusable-build.yml"
       - ".github/workflows/reusable-build-test-config.yml"
       - ".github/workflows/reusable-build-test.yml"
+      - ".github/workflows/reusable-clang-tidy.yml"
+      - ".github/workflows/reusable-clang-tidy-files.yml"
       - ".github/workflows/reusable-strategy-matrix.yml"
       - ".github/workflows/reusable-test.yml"
       - ".github/workflows/reusable-upload-recipe.yml"
+      - ".clang-tidy"
       - ".codecov.yml"
       - "cmake/**"
       - "conan/**"
@@ -59,6 +63,15 @@ defaults:
     shell: bash
 
 jobs:
+  clang-tidy:
+    uses: ./.github/workflows/reusable-clang-tidy.yml
+    permissions:
+      issues: write
+      contents: read
+    with:
+      check_only_changed: false
+      create_issue_on_failure: ${{ github.event_name == 'schedule' }}
+
   build-test:
     uses: ./.github/workflows/reusable-build-test.yml
     strategy:
@@ -79,8 +92,8 @@ jobs:
 
   upload-recipe:
     needs: build-test
-    # Only run when pushing to the develop branch in the XRPLF repository.
-    if: ${{ github.repository_owner == 'XRPLF' && github.event_name == 'push' && github.ref == 'refs/heads/develop' }}
+    # Only run when pushing to the develop branch.
+    if: ${{ github.repository == 'XRPLF/rippled' && github.event_name == 'push' && github.ref == 'refs/heads/develop' }}
     uses: ./.github/workflows/reusable-upload-recipe.yml
     secrets:
       remote_username: ${{ secrets.CONAN_REMOTE_USERNAME }}

.github/workflows/pre-commit.yml

@@ -11,7 +11,7 @@ on:
 jobs:
   # Call the workflow in the XRPLF/actions repo that runs the pre-commit hooks.
   run-hooks:
-    uses: XRPLF/actions/.github/workflows/pre-commit.yml@282890f46d6921249d5659dd38babcb0bd8aef48
+    uses: XRPLF/actions/.github/workflows/pre-commit.yml@44856eb0d6ecb7d376370244324ab3dc8b863bad
     with:
       runs_on: ubuntu-latest
-      container: '{ "image": "ghcr.io/xrplf/ci/tools-rippled-pre-commit:sha-ab4d1f0" }'
+      container: '{ "image": "ghcr.io/xrplf/ci/tools-rippled-pre-commit:sha-41ec7c1" }'

.github/workflows/publish-docs.yml

@@ -4,6 +4,18 @@ name: Build and publish documentation
 
 on:
   push:
+    branches:
+      - "develop"
+      - "release*"
+    paths:
+      - ".github/workflows/publish-docs.yml"
+      - "*.md"
+      - "**/*.md"
+      - "docs/**"
+      - "include/**"
+      - "src/libxrpl/**"
+      - "src/xrpld/**"
+  pull_request:
     paths:
       - ".github/workflows/publish-docs.yml"
       - "*.md"
@@ -23,20 +35,25 @@ defaults:
 
 env:
   BUILD_DIR: build
-  NPROC_SUBTRACT: 2
+  # ubuntu-latest has only 2 CPUs for private repositories
+  # https://docs.github.com/en/actions/reference/runners/github-hosted-runners#standard-github-hosted-runners-for--private-repositories
+  NPROC_SUBTRACT: ${{ github.event.repository.private && '1' || '2' }}
 
 jobs:
-  publish:
+  build:
     runs-on: ubuntu-latest
     container: ghcr.io/xrplf/ci/tools-rippled-documentation:sha-a8c7be1
-    permissions:
-      contents: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Prepare runner
+        uses: XRPLF/actions/prepare-runner@2cbf481018d930656e9276fcc20dc0e3a0be5b6d
+        with:
+          enable_ccache: false
 
       - name: Get number of processors
-        uses: XRPLF/actions/get-nproc@2ece4ec6ab7de266859a6f053571425b2bd684b6
+        uses: XRPLF/actions/get-nproc@cf0433aa74563aead044a1e395610c96d65a37cf
         id: nproc
         with:
           subtract: ${{ env.NPROC_SUBTRACT }}
@@ -64,9 +81,23 @@ jobs:
           cmake -Donly_docs=ON ..
           cmake --build . --target docs --parallel ${BUILD_NPROC}
 
-      - name: Publish documentation
-        if: ${{ github.ref_type == 'branch' && github.ref_name == github.event.repository.default_branch }}
-        uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e # v4.0.0
+      - name: Create documentation artifact
+        if: ${{ github.event_name == 'push' }}
+        uses: actions/upload-pages-artifact@7b1f4a764d45c48632c6b24a0339c27f5614fb0b # v4.0.0
         with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ${{ env.BUILD_DIR }}/docs/html
+          path: ${{ env.BUILD_DIR }}/docs/html
+
+  deploy:
+    if: ${{ github.event_name == 'push' }}
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      pages: write
+      id-token: write
+    environment:
+      name: github-pages
+      url: ${{ steps.deploy.outputs.page_url }}
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deploy
+        uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e # v4.0.5

.github/workflows/reusable-build-test-config.yml

@@ -101,13 +101,13 @@ jobs:
     steps:
       - name: Cleanup workspace (macOS and Windows)
         if: ${{ runner.os == 'macOS' || runner.os == 'Windows' }}
-        uses: XRPLF/actions/cleanup-workspace@2ece4ec6ab7de266859a6f053571425b2bd684b6
+        uses: XRPLF/actions/cleanup-workspace@cf0433aa74563aead044a1e395610c96d65a37cf
 
       - name: Checkout repository
-        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Prepare runner
-        uses: XRPLF/actions/prepare-runner@f05cab7b8541eee6473aa42beb9d2fe35608a190
+        uses: XRPLF/actions/prepare-runner@2cbf481018d930656e9276fcc20dc0e3a0be5b6d
         with:
           enable_ccache: ${{ inputs.ccache_enabled }}
 
@@ -119,12 +119,14 @@ jobs:
         uses: ./.github/actions/print-env
 
       - name: Get number of processors
-        uses: XRPLF/actions/get-nproc@2ece4ec6ab7de266859a6f053571425b2bd684b6
+        uses: XRPLF/actions/get-nproc@cf0433aa74563aead044a1e395610c96d65a37cf
         id: nproc
         with:
           subtract: ${{ inputs.nproc_subtract }}
 
       - name: Setup Conan
+        env:
+          SANITIZERS: ${{ inputs.sanitizers }}
         uses: ./.github/actions/setup-conan
 
       - name: Build dependencies
@@ -174,8 +176,8 @@ jobs:
           fi
 
       - name: Upload the binary (Linux)
-        if: ${{ github.repository_owner == 'XRPLF' && runner.os == 'Linux' }}
-        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        if: ${{ github.repository == 'XRPLF/rippled' && runner.os == 'Linux' }}
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         with:
           name: xrpld-${{ inputs.config_name }}
           path: ${{ env.BUILD_DIR }}/xrpld
@@ -251,8 +253,8 @@ jobs:
             --target coverage
 
       - name: Upload coverage report
-        if: ${{ github.repository_owner == 'XRPLF' && !inputs.build_only && env.COVERAGE_ENABLED == 'true' }}
-        uses: codecov/codecov-action@18283e04ce6e62d37312384ff67231eb8fd56d24 # v5.4.3
+        if: ${{ github.repository == 'XRPLF/rippled' && !inputs.build_only && env.COVERAGE_ENABLED == 'true' }}
+        uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5.5.2
         with:
           disable_search: true
           disable_telem: true

.github/workflows/reusable-check-levelization.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Check levelization
         run: .github/scripts/levelization/generate.sh
       - name: Check for differences

.github/workflows/reusable-check-rename.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Check definitions
         run: .github/scripts/rename/definitions.sh .
       - name: Check copyright notices
@@ -31,6 +31,8 @@ jobs:
         run: .github/scripts/rename/namespace.sh .
       - name: Check config name
         run: .github/scripts/rename/config.sh .
+      - name: Check include guards
+        run: .github/scripts/rename/include.sh .
       - name: Check for differences
         env:
           MESSAGE: |

.github/workflows/reusable-clang-tidy-files.yml

@@ -0,0 +1,162 @@
+name: Run clang-tidy on files
+
+on:
+  workflow_call:
+    inputs:
+      files:
+        description: "List of files to check (empty means check all files)"
+        type: string
+        default: ""
+      create_issue_on_failure:
+        description: "Whether to create an issue if the check failed"
+        type: boolean
+        default: false
+
+defaults:
+  run:
+    shell: bash
+
+env:
+  # Conan installs the generators in the build/generators directory, see the
+  # layout() method in conanfile.py. We then run CMake from the build directory.
+  BUILD_DIR: build
+  BUILD_TYPE: Release
+
+jobs:
+  run-clang-tidy:
+    name: Run clang tidy
+    runs-on: ["self-hosted", "Linux", "X64", "heavy"]
+    container: "ghcr.io/xrplf/ci/debian-trixie:clang-21-sha-53033a2"
+    permissions:
+      issues: write
+      contents: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Prepare runner
+        uses: XRPLF/actions/prepare-runner@2cbf481018d930656e9276fcc20dc0e3a0be5b6d
+        with:
+          enable_ccache: false
+
+      - name: Print build environment
+        uses: ./.github/actions/print-env
+
+      - name: Get number of processors
+        uses: XRPLF/actions/get-nproc@cf0433aa74563aead044a1e395610c96d65a37cf
+        id: nproc
+
+      - name: Setup Conan
+        uses: ./.github/actions/setup-conan
+
+      - name: Build dependencies
+        uses: ./.github/actions/build-deps
+        with:
+          build_nproc: ${{ steps.nproc.outputs.nproc }}
+          build_type: ${{ env.BUILD_TYPE }}
+          log_verbosity: verbose
+
+      - name: Configure CMake
+        working-directory: ${{ env.BUILD_DIR }}
+        run: |
+          cmake \
+            -G 'Ninja' \
+            -DCMAKE_TOOLCHAIN_FILE:FILEPATH=build/generators/conan_toolchain.cmake \
+            -DCMAKE_BUILD_TYPE="${BUILD_TYPE}" \
+            -Dtests=ON \
+            -Dwerr=ON \
+            -Dxrpld=ON \
+            ..
+
+      # clang-tidy needs headers generated from proto files
+      - name: Build libxrpl.libpb
+        working-directory: ${{ env.BUILD_DIR }}
+        run: |
+          ninja -j ${{ steps.nproc.outputs.nproc }} xrpl.libpb
+
+      - name: Run clang tidy
+        id: run_clang_tidy
+        continue-on-error: true
+        env:
+          FILES: ${{ inputs.files }}
+        run: |
+          run-clang-tidy -j ${{ steps.nproc.outputs.nproc }} -p "$BUILD_DIR" $FILES 2>&1 | tee clang-tidy-output.txt
+
+      - name: Upload clang-tidy output
+        if: steps.run_clang_tidy.outcome != 'success'
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
+        with:
+          name: clang-tidy-results
+          path: clang-tidy-output.txt
+          retention-days: 30
+
+      - name: Create an issue
+        if: steps.run_clang_tidy.outcome != 'success' && inputs.create_issue_on_failure
+        id: create_issue
+        shell: bash
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          # Prepare issue body with clang-tidy output
+          cat > issue.md <<EOF
+          ## Clang-tidy Check Failed
+
+          **Workflow:** ${{ github.workflow }}
+          **Run ID:** ${{ github.run_id }}
+          **Commit:** ${{ github.sha }}
+          **Branch/Ref:** ${{ github.ref }}
+          **Triggered by:** ${{ github.actor }}
+
+          ### Clang-tidy Output:
+          \`\`\`
+          EOF
+
+          # Append clang-tidy output (filter for errors and warnings)
+          if [ -f clang-tidy-output.txt ]; then
+            # Extract lines containing 'error:', 'warning:', or 'note:'
+            grep -E '(error:|warning:|note:)' clang-tidy-output.txt > filtered-output.txt || true
+
+            # If filtered output is empty, use original (might be a different error format)
+            if [ ! -s filtered-output.txt ]; then
+              cp clang-tidy-output.txt filtered-output.txt
+            fi
+
+            # Truncate if too large
+            head -c 60000 filtered-output.txt >> issue.md
+            if [ "$(wc -c < filtered-output.txt)" -gt 60000 ]; then
+              echo "" >> issue.md
+              echo "... (output truncated, see artifacts for full output)" >> issue.md
+            fi
+
+            rm filtered-output.txt
+          else
+            echo "No output file found" >> issue.md
+          fi
+
+          cat >> issue.md <<EOF
+          \`\`\`
+
+          **Workflow run:** ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
+
+          ---
+          *This issue was automatically created by the clang-tidy workflow.*
+          EOF
+
+          # Create the issue
+          gh issue create \
+            --label "Bug,Clang-tidy" \
+            --title "Clang-tidy check failed" \
+            --body-file ./issue.md \
+            > create_issue.log
+
+          created_issue="$(sed 's|.*/||' create_issue.log)"
+          echo "created_issue=$created_issue" >> $GITHUB_OUTPUT
+          echo "Created issue #$created_issue"
+
+          rm -f create_issue.log issue.md clang-tidy-output.txt
+
+      - name: Fail the workflow if clang-tidy failed
+        if: steps.run_clang_tidy.outcome != 'success'
+        run: |
+          echo "Clang-tidy check failed!"
+          exit 1

.github/workflows/reusable-clang-tidy.yml

@@ -0,0 +1,55 @@
+name: Clang-tidy check
+
+on:
+  workflow_call:
+    inputs:
+      check_only_changed:
+        description: "Check only changed files in PR. If false, checks all files in the repository."
+        type: boolean
+        default: false
+      create_issue_on_failure:
+        description: "Whether to create an issue if the check failed"
+        type: boolean
+        default: false
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  determine-files:
+    name: Determine files to check
+    if: ${{ inputs.check_only_changed }}
+    runs-on: ubuntu-latest
+    outputs:
+      clang_tidy_config_changed: ${{ steps.changed_clang_tidy.outputs.any_changed }}
+      any_cpp_changed: ${{ steps.changed_files.outputs.any_changed }}
+      all_changed_files: ${{ steps.changed_files.outputs.all_changed_files }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Get changed C++ files
+        id: changed_files
+        uses: tj-actions/changed-files@22103cc46bda19c2b464ffe86db46df6922fd323 # v47.0.5
+        with:
+          files: |
+            **/*.cpp
+            **/*.h
+            **/*.ipp
+          separator: " "
+
+      - name: Get changed clang-tidy configuration
+        id: changed_clang_tidy
+        uses: tj-actions/changed-files@22103cc46bda19c2b464ffe86db46df6922fd323 # v47.0.5
+        with:
+          files: |
+            .clang-tidy
+
+  run-clang-tidy:
+    needs: [determine-files]
+    if: ${{ always() && !cancelled() && (!inputs.check_only_changed || needs.determine-files.outputs.any_cpp_changed == 'true' || needs.determine-files.outputs.clang_tidy_config_changed == 'true') }}
+    uses: ./.github/workflows/reusable-clang-tidy-files.yml
+    with:
+      files: ${{ needs.determine-files.outputs.clang_tidy_config_changed == 'true' && '' || (inputs.check_only_changed && needs.determine-files.outputs.all_changed_files || '') }}
+      create_issue_on_failure: ${{ inputs.create_issue_on_failure }}

.github/workflows/reusable-strategy-matrix.yml

@@ -29,10 +29,10 @@ jobs:
       matrix: ${{ steps.generate.outputs.matrix }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Set up Python
-        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: 3.13
 

.github/workflows/reusable-upload-recipe.yml

@@ -43,16 +43,12 @@ jobs:
     container: ghcr.io/xrplf/ci/ubuntu-noble:gcc-13-sha-5dd7158
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Generate build version number
         id: version
         uses: ./.github/actions/generate-version
 
-      - name: Determine recipe reference
-        id: ref
-        run: echo "ref=xrpl/${{ steps.version.outputs.version }}" >> "${GITHUB_OUTPUT}"
-
       - name: Set up Conan
         uses: ./.github/actions/setup-conan
         with:
@@ -62,17 +58,46 @@ jobs:
       - name: Log into Conan remote
         env:
           REMOTE_NAME: ${{ inputs.remote_name }}
-          REMOTE_USERNAME: ${{ inputs.remote_username }}
-          REMOTE_PASSWORD: ${{ inputs.remote_password }}
+          REMOTE_USERNAME: ${{ secrets.remote_username }}
+          REMOTE_PASSWORD: ${{ secrets.remote_password }}
         run: conan remote login "${REMOTE_NAME}" "${REMOTE_USERNAME}" --password "${REMOTE_PASSWORD}"
 
-      - name: Upload Conan recipe
+      - name: Upload Conan recipe (version)
         env:
-          RECIPE_REF: ${{ steps.ref.outputs.ref }}
           REMOTE_NAME: ${{ inputs.remote_name }}
         run: |
-          conan export .
-          conan upload --confirm --check --remote="${REMOTE_NAME}" ${RECIPE_REF}
+          conan export . --version=${{ steps.version.outputs.version }}
+          conan upload --confirm --check --remote="${REMOTE_NAME}" xrpl/${{ steps.version.outputs.version }}
+
+      # When this workflow is triggered by a push event, it will always be when merging into the
+      # 'develop' branch, see on-trigger.yml.
+      - name: Upload Conan recipe (develop)
+        if: ${{ github.event_name == 'push' }}
+        env:
+          REMOTE_NAME: ${{ inputs.remote_name }}
+        run: |
+          conan export . --version=develop
+          conan upload --confirm --check --remote="${REMOTE_NAME}" xrpl/develop
+
+      # When this workflow is triggered by a pull request event, it will always be when merging into
+      # one of the 'release' branches, see on-pr.yml.
+      - name: Upload Conan recipe (rc)
+        if: ${{ github.event_name == 'pull_request' }}
+        env:
+          REMOTE_NAME: ${{ inputs.remote_name }}
+        run: |
+          conan export . --version=rc
+          conan upload --confirm --check --remote="${REMOTE_NAME}" xrpl/rc
+
+      # When this workflow is triggered by a tag event, it will always be when tagging a final
+      # release, see on-tag.yml.
+      - name: Upload Conan recipe (release)
+        if: ${{ github.event_name == 'tag' }}
+        env:
+          REMOTE_NAME: ${{ inputs.remote_name }}
+        run: |
+          conan export . --version=release
+          conan upload --confirm --check --remote="${REMOTE_NAME}" xrpl/release
 
     outputs:
-      ref: ${{ steps.ref.outputs.ref }}
+      ref: xrpl/${{ steps.version.outputs.version }}

.github/workflows/telemetry-validation.yml

@@ -0,0 +1,242 @@
+# Telemetry Validation CI Workflow
+#
+# Builds rippled with telemetry enabled, runs the multi-node workload
+# harness, validates all telemetry data, and runs performance benchmarks.
+#
+# This is a separate workflow from the main CI. It runs:
+#   - On manual dispatch (workflow_dispatch)
+#   - On pushes to telemetry-related branches
+#
+# The workflow is intentionally heavyweight (builds rippled, starts Docker
+# services, runs a multi-node cluster) — it validates the full telemetry
+# stack end-to-end rather than individual unit tests.
+#
+# Architecture: two jobs to leverage cached dependencies:
+#   1. build-xrpld — runs on a self-hosted runner inside the same container
+#      image the main CI uses (debian-bookworm-gcc-13). This ensures Conan
+#      packages are fetched from the XRPLF remote instead of built from
+#      source, and ccache hits the remote cache.
+#   2. validate-telemetry — runs on ubuntu-latest (which has Docker) to
+#      launch the telemetry stack (OTel collector, Prometheus, Tempo, etc.)
+#      and validate the full pipeline end-to-end.
+
+name: Telemetry Validation
+
+on:
+  workflow_dispatch:
+    inputs:
+      rpc_rate:
+        description: "RPC load rate (requests per second)"
+        required: false
+        default: "50"
+      rpc_duration:
+        description: "RPC load duration (seconds)"
+        required: false
+        default: "120"
+      tx_tps:
+        description: "Transaction submit rate (TPS)"
+        required: false
+        default: "5"
+      tx_duration:
+        description: "Transaction submit duration (seconds)"
+        required: false
+        default: "120"
+      run_benchmark:
+        description: "Run performance benchmarks"
+        required: false
+        type: boolean
+        default: false
+
+  push:
+    branches:
+      - "pratik/otel-phase*"
+      - "feature/otel-*"
+      - "feature/telemetry-*"
+    paths:
+      - ".github/workflows/telemetry-validation.yml"
+      - "docker/telemetry/**"
+      - "include/xrpl/basics/Telemetry*.h"
+      - "src/xrpld/app/misc/Telemetry*"
+
+concurrency:
+  group: telemetry-validation-${{ github.ref }}
+  cancel-in-progress: true
+
+defaults:
+  run:
+    shell: bash
+
+env:
+  BUILD_DIR: build
+
+jobs:
+  # ── Job 1: Build xrpld in the same container the main CI uses ──────
+  # This ensures Conan binary packages are fetched from the XRPLF remote
+  # (matching package IDs) and ccache hits the remote compilation cache.
+  build-xrpld:
+    name: Build xrpld
+    runs-on: [self-hosted, Linux, X64, heavy]
+    container: ghcr.io/xrplf/ci/debian-bookworm:gcc-13-sha-ab4d1f0
+    timeout-minutes: 60
+    env:
+      CCACHE_NAMESPACE: telemetry-validation
+      CCACHE_REMOTE_ONLY: true
+      CCACHE_REMOTE_STORAGE: http://cache.dev.ripplex.io:8080|layout=bazel
+      CCACHE_SLOPPINESS: include_file_ctime,include_file_mtime
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Prepare runner
+        uses: XRPLF/actions/prepare-runner@2cbf481018d930656e9276fcc20dc0e3a0be5b6d
+        with:
+          enable_ccache: ${{ github.repository_owner == 'XRPLF' }}
+
+      - name: Print build environment
+        uses: ./.github/actions/print-env
+
+      - name: Get number of processors
+        uses: XRPLF/actions/get-nproc@cf0433aa74563aead044a1e395610c96d65a37cf
+        id: nproc
+        with:
+          subtract: 2
+
+      - name: Setup Conan
+        uses: ./.github/actions/setup-conan
+
+      - name: Build dependencies
+        uses: ./.github/actions/build-deps
+        with:
+          build_nproc: ${{ steps.nproc.outputs.nproc }}
+          build_type: Release
+          log_verbosity: verbose
+
+      - name: Configure CMake
+        working-directory: ${{ env.BUILD_DIR }}
+        run: |
+          cmake \
+            -G Ninja \
+            -DCMAKE_TOOLCHAIN_FILE:FILEPATH=build/generators/conan_toolchain.cmake \
+            -DCMAKE_BUILD_TYPE=Release \
+            ..
+
+      - name: Build xrpld
+        working-directory: ${{ env.BUILD_DIR }}
+        env:
+          BUILD_NPROC: ${{ steps.nproc.outputs.nproc }}
+        run: |
+          cmake \
+            --build . \
+            --config Release \
+            --parallel "${BUILD_NPROC}" \
+            --target xrpld
+
+      - name: Show ccache statistics
+        if: ${{ github.repository_owner == 'XRPLF' }}
+        run: ccache --show-stats -vv
+
+      - name: Upload xrpld binary
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
+        with:
+          name: xrpld-telemetry
+          path: ${{ env.BUILD_DIR }}/xrpld
+          retention-days: 1
+          if-no-files-found: error
+
+  # ── Job 2: Run telemetry validation on ubuntu-latest (has Docker) ──
+  validate-telemetry:
+    name: Telemetry Stack Validation
+    needs: build-xrpld
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Install Python dependencies
+        run: pip3 install -r docker/telemetry/workload/requirements.txt
+
+      - name: Download xrpld binary
+        uses: actions/download-artifact@95815c38cf2ff2164869cbab79da8d1f422bc89e # v4.2.1
+        with:
+          name: xrpld-telemetry
+          path: ${{ env.BUILD_DIR }}
+
+      - name: Make binaries and scripts executable
+        run: |
+          chmod +x ${{ env.BUILD_DIR }}/xrpld
+          chmod +x docker/telemetry/workload/*.sh
+
+      - name: Run full telemetry validation
+        id: validation
+        env:
+          RPC_RATE: ${{ github.event.inputs.rpc_rate || '50' }}
+          RPC_DURATION: ${{ github.event.inputs.rpc_duration || '120' }}
+          TX_TPS: ${{ github.event.inputs.tx_tps || '5' }}
+          TX_DURATION: ${{ github.event.inputs.tx_duration || '120' }}
+          RUN_BENCHMARK: ${{ github.event.inputs.run_benchmark }}
+        run: |
+          ARGS="--xrpld ${{ env.BUILD_DIR }}/xrpld --skip-loki"
+          ARGS="$ARGS --rpc-rate $RPC_RATE"
+          ARGS="$ARGS --rpc-duration $RPC_DURATION"
+          ARGS="$ARGS --tx-tps $TX_TPS"
+          ARGS="$ARGS --tx-duration $TX_DURATION"
+          if [ "$RUN_BENCHMARK" = "true" ]; then
+            ARGS="$ARGS --with-benchmark"
+          fi
+          docker/telemetry/workload/run-full-validation.sh $ARGS
+        # continue-on-error allows subsequent steps (artifact upload,
+        # summary printing) to run even if validation fails. The final
+        # "Check validation result" step re-checks steps.validation.outcome
+        # (the pre-continue-on-error result) and fails the job properly.
+        continue-on-error: true
+
+      - name: Upload validation reports
+        if: always()
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
+        with:
+          name: telemetry-validation-reports
+          path: /tmp/xrpld-validation/reports/
+          retention-days: 30
+
+      - name: Upload node logs
+        if: failure()
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
+        with:
+          name: xrpld-node-logs
+          path: /tmp/xrpld-validation/node*/debug.log
+          retention-days: 7
+
+      - name: Print validation summary
+        if: always()
+        run: |
+          REPORT="/tmp/xrpld-validation/reports/validation-report.json"
+          if [ -f "$REPORT" ]; then
+            echo "## Telemetry Validation Results" >> "$GITHUB_STEP_SUMMARY"
+            echo "" >> "$GITHUB_STEP_SUMMARY"
+            TOTAL=$(jq '.summary.total' "$REPORT")
+            PASSED=$(jq '.summary.passed' "$REPORT")
+            FAILED=$(jq '.summary.failed' "$REPORT")
+            echo "| Metric | Value |" >> "$GITHUB_STEP_SUMMARY"
+            echo "|--------|-------|" >> "$GITHUB_STEP_SUMMARY"
+            echo "| Total Checks | $TOTAL |" >> "$GITHUB_STEP_SUMMARY"
+            echo "| Passed | $PASSED |" >> "$GITHUB_STEP_SUMMARY"
+            echo "| Failed | $FAILED |" >> "$GITHUB_STEP_SUMMARY"
+            echo "" >> "$GITHUB_STEP_SUMMARY"
+            if [ "$FAILED" -gt 0 ]; then
+              echo "### Failed Checks" >> "$GITHUB_STEP_SUMMARY"
+              echo "" >> "$GITHUB_STEP_SUMMARY"
+              jq -r '.checks[] | select(.passed == false) | "- **\(.name)**: \(.message)"' "$REPORT" >> "$GITHUB_STEP_SUMMARY"
+            fi
+          fi
+
+      - name: Cleanup
+        if: always()
+        run: |
+          docker/telemetry/workload/run-full-validation.sh --cleanup 2>/dev/null || true
+
+      - name: Check validation result
+        if: steps.validation.outcome == 'failure'
+        run: |
+          echo "Telemetry validation failed. Check the uploaded reports for details."
+          exit 1

.github/workflows/upload-conan-deps.yml

@@ -64,13 +64,13 @@ jobs:
     steps:
       - name: Cleanup workspace (macOS and Windows)
         if: ${{ runner.os == 'macOS' || runner.os == 'Windows' }}
-        uses: XRPLF/actions/cleanup-workspace@2ece4ec6ab7de266859a6f053571425b2bd684b6
+        uses: XRPLF/actions/cleanup-workspace@cf0433aa74563aead044a1e395610c96d65a37cf
 
       - name: Checkout repository
-        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Prepare runner
-        uses: XRPLF/actions/prepare-runner@f05cab7b8541eee6473aa42beb9d2fe35608a190
+        uses: XRPLF/actions/prepare-runner@2cbf481018d930656e9276fcc20dc0e3a0be5b6d
         with:
           enable_ccache: false
 
@@ -78,12 +78,14 @@ jobs:
         uses: ./.github/actions/print-env
 
       - name: Get number of processors
-        uses: XRPLF/actions/get-nproc@2ece4ec6ab7de266859a6f053571425b2bd684b6
+        uses: XRPLF/actions/get-nproc@cf0433aa74563aead044a1e395610c96d65a37cf
         id: nproc
         with:
           subtract: ${{ env.NPROC_SUBTRACT }}
 
       - name: Setup Conan
+        env:
+          SANITIZERS: ${{ matrix.sanitizers }}
         uses: ./.github/actions/setup-conan
         with:
           remote_name: ${{ env.CONAN_REMOTE_NAME }}
@@ -98,13 +100,14 @@ jobs:
           # Set the verbosity to "quiet" for Windows to avoid an excessive
           # amount of logs. For other OSes, the "verbose" logs are more useful.
           log_verbosity: ${{ runner.os == 'Windows' && 'quiet' || 'verbose' }}
+          sanitizers: ${{ matrix.sanitizers }}
 
       - name: Log into Conan remote
-        if: ${{ github.repository_owner == 'XRPLF' && (github.event_name == 'push' || github.event_name == 'workflow_dispatch') }}
+        if: ${{ github.repository == 'XRPLF/rippled' && (github.event_name == 'push' || github.event_name == 'workflow_dispatch') }}
         run: conan remote login "${CONAN_REMOTE_NAME}" "${{ secrets.CONAN_REMOTE_USERNAME }}" --password "${{ secrets.CONAN_REMOTE_PASSWORD }}"
 
       - name: Upload Conan packages
-        if: ${{ github.repository_owner == 'XRPLF' && (github.event_name == 'push' || github.event_name == 'workflow_dispatch') }}
+        if: ${{ github.repository == 'XRPLF/rippled' && (github.event_name == 'push' || github.event_name == 'workflow_dispatch') }}
         env:
           FORCE_OPTION: ${{ github.event.inputs.force_upload == 'true' && '--force' || '' }}
         run: conan upload "*" --remote="${CONAN_REMOTE_NAME}" --confirm ${FORCE_OPTION}

.gitignore

@@ -42,6 +42,9 @@ gmon.out
 # Locally patched Conan recipes
 external/conan-center-index/
 
+# Local conan directory
+.conan
+
 # XCode IDE.
 *.pbxuser
 !default.pbxuser
@@ -64,7 +67,16 @@ DerivedData
 /.vs/
 /.vscode/
 
+# zed IDE.
+/.zed/
+
 # AI tools.
 /.augment
 /.claude
 /CLAUDE.md
+
+# Direnv's directory
+/.direnv
+
+# clangd cache
+/.cache

.pre-commit-config.yaml

@@ -20,24 +20,29 @@ repos:
         args: [--assume-in-merge]
 
   - repo: https://github.com/pre-commit/mirrors-clang-format
-    rev: 7d85583be209cb547946c82fbe51f4bc5dd1d017 # frozen: v18.1.8
+    rev: cd481d7b0bfb5c7b3090c21846317f9a8262e891 # frozen: v22.1.0
     hooks:
       - id: clang-format
         args: [--style=file]
         "types_or": [c++, c, proto]
 
+  - repo: https://github.com/BlankSpruce/gersemi
+    rev: 0.26.0
+    hooks:
+      - id: gersemi
+
   - repo: https://github.com/rbubley/mirrors-prettier
-    rev: 5ba47274f9b181bce26a5150a725577f3c336011 # frozen: v3.6.2
+    rev: c2bc67fe8f8f549cc489e00ba8b45aa18ee713b1 # frozen: v3.8.1
     hooks:
       - id: prettier
 
   - repo: https://github.com/psf/black-pre-commit-mirror
-    rev: 831207fd435b47aeffdf6af853097e64322b4d44 # frozen: v25.12.0
+    rev: ea488cebbfd88a5f50b8bd95d5c829d0bb76feb8 # frozen: 26.1.0
     hooks:
       - id: black
 
   - repo: https://github.com/streetsidesoftware/cspell-cli
-    rev: 1cfa010f078c354f3ffb8413616280cc28f5ba21 # frozen: v9.4.0
+    rev: a42085ade523f591dca134379a595e7859986445 # frozen: v9.7.0
     hooks:
       - id: cspell # Spell check changed files
         exclude: .config/cspell.config.yaml
@@ -51,6 +56,24 @@ repos:
           - .git/COMMIT_EDITMSG
         stages: [commit-msg]
 
+  - repo: local
+    hooks:
+      - id: nix-fmt
+        name: Format Nix files
+        entry: |
+          bash -c '
+            if command -v nix &> /dev/null || [ "$GITHUB_ACTIONS" = "true" ]; then
+              nix --extra-experimental-features "nix-command flakes" fmt "$@"
+            else
+              echo "Skipping nix-fmt: nix not installed and not in GitHub Actions"
+              exit 0
+            fi
+          ' --
+        language: system
+        types:
+          - nix
+        pass_filenames: true
+
 exclude: |
   (?x)^(
       external/.*|

API-CHANGELOG.md

@@ -6,90 +6,98 @@ For info about how [API versioning](https://xrpl.org/request-formatting.html#api
 
 The API version controls the API behavior you see. This includes what properties you see in responses, what parameters you're permitted to send in requests, and so on. You specify the API version in each of your requests. When a breaking change is introduced to the `rippled` API, a new version is released. To avoid breaking your code, you should set (or increase) your version when you're ready to upgrade.
 
+The [commandline](https://xrpl.org/docs/references/http-websocket-apis/api-conventions/request-formatting/#commandline-format) always uses the latest API version. The command line is intended for ad-hoc usage by humans, not programs or automated scripts. The command line is not meant for use in production code.
+
 For a log of breaking changes, see the **API Version [number]** headings. In general, breaking changes are associated with a particular API Version number. For non-breaking changes, scroll to the **XRP Ledger version [x.y.z]** headings. Non-breaking changes are associated with a particular XRP Ledger (`rippled`) release.
 
+## API Version 3 (Beta)
+
+API version 3 is currently a beta API. It requires enabling `[beta_rpc_api]` in the rippled configuration to use. See [API-VERSION-3.md](API-VERSION-3.md) for the full list of changes in API version 3.
+
 ## API Version 2
 
-API version 2 is available in `rippled` version 2.0.0 and later. To use this API, clients specify `"api_version" : 2` in each request.
-
-#### Removed methods
-
-In API version 2, the following deprecated methods are no longer available: (https://github.com/XRPLF/rippled/pull/4759)
-
-- `tx_history` - Instead, use other methods such as `account_tx` or `ledger` with the `transactions` field set to `true`.
-- `ledger_header` - Instead, use the `ledger` method.
-
-#### Modifications to JSON transaction element in V2
-
-In API version 2, JSON elements for transaction output have been changed and made consistent for all methods which output transactions. (https://github.com/XRPLF/rippled/pull/4775)
-This helps to unify the JSON serialization format of transactions. (https://github.com/XRPLF/clio/issues/722, https://github.com/XRPLF/rippled/issues/4727)
-
-- JSON transaction element is named `tx_json`
-- Binary transaction element is named `tx_blob`
-- JSON transaction metadata element is named `meta`
-- Binary transaction metadata element is named `meta_blob`
-
-Additionally, these elements are now consistently available next to `tx_json` (i.e. sibling elements), where possible:
-
-- `hash` - Transaction ID. This data was stored inside transaction output in API version 1, but in API version 2 is a sibling element.
-- `ledger_index` - Ledger index (only set on validated ledgers)
-- `ledger_hash` - Ledger hash (only set on closed or validated ledgers)
-- `close_time_iso` - Ledger close time expressed in ISO 8601 time format (only set on validated ledgers)
-- `validated` - Bool element set to `true` if the transaction is in a validated ledger, otherwise `false`
-
-This change affects the following methods:
-
-- `tx` - Transaction data moved into element `tx_json` (was inline inside `result`) or, if binary output was requested, moved from `tx` to `tx_blob`. Renamed binary transaction metadata element (if it was requested) from `meta` to `meta_blob`. Changed location of `hash` and added new elements
-- `account_tx` - Renamed transaction element from `tx` to `tx_json`. Renamed binary transaction metadata element (if it was requested) from `meta` to `meta_blob`. Changed location of `hash` and added new elements
-- `transaction_entry` - Renamed transaction metadata element from `metadata` to `meta`. Changed location of `hash` and added new elements
-- `subscribe` - Renamed transaction element from `transaction` to `tx_json`. Changed location of `hash` and added new elements
-- `sign`, `sign_for`, `submit` and `submit_multisigned` - Changed location of `hash` element.
-
-#### Modification to `Payment` transaction JSON schema
-
-When reading Payments, the `Amount` field should generally **not** be used. Instead, use [delivered_amount](https://xrpl.org/partial-payments.html#the-delivered_amount-field) to see the amount that the Payment delivered. To clarify its meaning, the `Amount` field is being renamed to `DeliverMax`. (https://github.com/XRPLF/rippled/pull/4733)
-
-- In `Payment` transaction type, JSON RPC field `Amount` is renamed to `DeliverMax`. To enable smooth client transition, `Amount` is still handled, as described below: (https://github.com/XRPLF/rippled/pull/4733)
-  - On JSON RPC input (e.g. `submit_multisigned` etc. methods), `Amount` is recognized as an alias to `DeliverMax` for both API version 1 and version 2 clients.
-  - On JSON RPC input, submitting both `Amount` and `DeliverMax` fields is allowed _only_ if they are identical; otherwise such input is rejected with `rpcINVALID_PARAMS` error.
-  - On JSON RPC output (e.g. `subscribe`, `account_tx` etc. methods), `DeliverMax` is present in both API version 1 and version 2.
-  - On JSON RPC output, `Amount` is only present in API version 1 and _not_ in version 2.
-
-#### Modifications to account_info response
-
-- `signer_lists` is returned in the root of the response. (In API version 1, it was nested under `account_data`.) (https://github.com/XRPLF/rippled/pull/3770)
-- When using an invalid `signer_lists` value, the API now returns an "invalidParams" error. (https://github.com/XRPLF/rippled/pull/4585)
-  - (`signer_lists` must be a boolean. In API version 1, strings were accepted and may return a normal response - i.e. as if `signer_lists` were `true`.)
-
-#### Modifications to [account_tx](https://xrpl.org/account_tx.html#account_tx) response
-
-- Using `ledger_index_min`, `ledger_index_max`, and `ledger_index` returns `invalidParams` because if you use `ledger_index_min` or `ledger_index_max`, then it does not make sense to also specify `ledger_index`. In API version 1, no error was returned. (https://github.com/XRPLF/rippled/pull/4571)
-  - The same applies for `ledger_index_min`, `ledger_index_max`, and `ledger_hash`. (https://github.com/XRPLF/rippled/issues/4545#issuecomment-1565065579)
-- Using a `ledger_index_min` or `ledger_index_max` beyond the range of ledgers that the server has:
-  - returns `lgrIdxMalformed` in API version 2. Previously, in API version 1, no error was returned. (https://github.com/XRPLF/rippled/issues/4288)
-- Attempting to use a non-boolean value (such as a string) for the `binary` or `forward` parameters returns `invalidParams` (`rpcINVALID_PARAMS`). Previously, in API version 1, no error was returned. (https://github.com/XRPLF/rippled/pull/4620)
-
-#### Modifications to [noripple_check](https://xrpl.org/noripple_check.html#noripple_check) response
-
-- Attempting to use a non-boolean value (such as a string) for the `transactions` parameter returns `invalidParams` (`rpcINVALID_PARAMS`). Previously, in API version 1, no error was returned. (https://github.com/XRPLF/rippled/pull/4620)
+API version 2 is available in `rippled` version 2.0.0 and later. See [API-VERSION-2.md](API-VERSION-2.md) for the full list of changes in API version 2.
 
 ## API Version 1
 
 This version is supported by all `rippled` versions. For WebSocket and HTTP JSON-RPC requests, it is currently the default API version used when no `api_version` is specified.
 
-The [commandline](https://xrpl.org/docs/references/http-websocket-apis/api-conventions/request-formatting/#commandline-format) always uses the latest API version. The command line is intended for ad-hoc usage by humans, not programs or automated scripts. The command line is not meant for use in production code.
+## Unreleased
 
-### Inconsistency: server_info - network_id
+This section contains changes targeting a future version.
 
-The `network_id` field was added in the `server_info` response in version 1.5.0 (2019), but it is not returned in [reporting mode](https://xrpl.org/rippled-server-modes.html#reporting-mode). However, use of reporting mode is now discouraged, in favor of using [Clio](https://github.com/XRPLF/clio) instead.
+### Additions
+
+- `server_definitions`: Added the following new sections to the response ([#6321](https://github.com/XRPLF/rippled/pull/6321)):
+  - `TRANSACTION_FORMATS`: Describes the fields and their optionality for each transaction type, including common fields shared across all transactions.
+  - `LEDGER_ENTRY_FORMATS`: Describes the fields and their optionality for each ledger entry type, including common fields shared across all ledger entries.
+  - `TRANSACTION_FLAGS`: Maps transaction type names to their supported flags and flag values.
+  - `LEDGER_ENTRY_FLAGS`: Maps ledger entry type names to their flags and flag values.
+  - `ACCOUNT_SET_FLAGS`: Maps AccountSet flag names (asf flags) to their numeric values.
+
+## XRP Ledger server version 3.1.0
+
+[Version 3.1.0](https://github.com/XRPLF/rippled/releases/tag/3.1.0) was released on Jan 27, 2026.
+
+### Additions in 3.1.0
+
+- `vault_info`: New RPC method to retrieve information about a specific vault (part of XLS-66 Lending Protocol). ([#6156](https://github.com/XRPLF/rippled/pull/6156))
+
+## XRP Ledger server version 3.0.0
+
+[Version 3.0.0](https://github.com/XRPLF/rippled/releases/tag/3.0.0) was released on Dec 9, 2025.
+
+### Additions in 3.0.0
+
+- `ledger_entry`: Supports all ledger entry types with dedicated parsers. ([#5237](https://github.com/XRPLF/rippled/pull/5237))
+- `ledger_entry`: New error codes `entryNotFound` and `unexpectedLedgerType` for more specific error handling. ([#5237](https://github.com/XRPLF/rippled/pull/5237))
+- `ledger_entry`: Improved error messages with more context (e.g., specifying which field is invalid or missing). ([#5237](https://github.com/XRPLF/rippled/pull/5237))
+- `ledger_entry`: Assorted bug fixes in RPC processing. ([#5237](https://github.com/XRPLF/rippled/pull/5237))
+- `simulate`: Supports additional metadata in the response. ([#5754](https://github.com/XRPLF/rippled/pull/5754))
+
+## XRP Ledger server version 2.6.2
+
+[Version 2.6.2](https://github.com/XRPLF/rippled/releases/tag/2.6.2) was released on Nov 19, 2025.
+
+This release contains bug fixes only and no API changes.
+
+## XRP Ledger server version 2.6.1
+
+[Version 2.6.1](https://github.com/XRPLF/rippled/releases/tag/2.6.1) was released on Sep 30, 2025.
+
+This release contains bug fixes only and no API changes.
+
+## XRP Ledger server version 2.6.0
+
+[Version 2.6.0](https://github.com/XRPLF/rippled/releases/tag/2.6.0) was released on Aug 27, 2025.
+
+### Additions in 2.6.0
+
+- `account_info`: Added `allowTrustLineLocking` flag in response. ([#5525](https://github.com/XRPLF/rippled/pull/5525))
+- `ledger`: Removed the type filter from the RPC command. ([#4934](https://github.com/XRPLF/rippled/pull/4934))
+- `subscribe` (`validations` stream): `network_id` is now included. ([#5579](https://github.com/XRPLF/rippled/pull/5579))
+- `subscribe` (`transactions` stream): `nftoken_id`, `nftoken_ids`, and `offer_id` are now included in transaction metadata. ([#5230](https://github.com/XRPLF/rippled/pull/5230))
+
+## XRP Ledger server version 2.5.1
+
+[Version 2.5.1](https://github.com/XRPLF/rippled/releases/tag/2.5.1) was released on Sep 17, 2025.
+
+This release contains bug fixes only and no API changes.
 
 ## XRP Ledger server version 2.5.0
 
-As of 2025-04-04, version 2.5.0 is in development. You can use a pre-release version by building from source or [using the `nightly` package](https://xrpl.org/docs/infrastructure/installation/install-rippled-on-ubuntu).
+[Version 2.5.0](https://github.com/XRPLF/rippled/releases/tag/2.5.0) was released on Jun 24, 2025.
 
 ### Additions and bugfixes in 2.5.0
 
-- `channel_authorize`: If `signing_support` is not enabled in the config, the RPC is disabled.
+- `tx`: Added `ctid` field to the response and improved error handling. ([#4738](https://github.com/XRPLF/rippled/pull/4738))
+- `ledger_entry`: Improved error messages in `permissioned_domain`. ([#5344](https://github.com/XRPLF/rippled/pull/5344))
+- `simulate`: Improved multi-sign usage. ([#5479](https://github.com/XRPLF/rippled/pull/5479))
+- `channel_authorize`: If `signing_support` is not enabled in the config, the RPC is disabled. ([#5385](https://github.com/XRPLF/rippled/pull/5385))
+- `subscribe` (admin): Removed webhook queue limit to prevent dropping notifications; reduced HTTP timeout from 10 minutes to 30 seconds. ([#5163](https://github.com/XRPLF/rippled/pull/5163))
+- `ledger_data` (gRPC): Fixed crashing issue with some invalid markers. ([#5137](https://github.com/XRPLF/rippled/pull/5137))
+- `account_lines`: Fixed error with `no_ripple` and `no_ripple_peer` sometimes showing up incorrectly. ([#5345](https://github.com/XRPLF/rippled/pull/5345))
+- `account_tx`: Fixed issue with incorrect CTIDs. ([#5408](https://github.com/XRPLF/rippled/pull/5408))
 
 ## XRP Ledger server version 2.4.0
 
@@ -97,11 +105,19 @@ As of 2025-04-04, version 2.5.0 is in development. You can use a pre-release ver
 
 ### Additions and bugfixes in 2.4.0
 
-- `ledger_entry`: `state` is added an alias for `ripple_state`.
-- `ledger_entry`: Enables case-insensitive filtering by canonical name in addition to case-sensitive filtering by RPC name.
-- `validators`: Added new field `validator_list_threshold` in response.
-- `simulate`: A new RPC that executes a [dry run of a transaction submission](https://github.com/XRPLF/XRPL-Standards/tree/master/XLS-0069d-simulate#2-rpc-simulate)
-- Signing methods autofill fees better and properly handle transactions that don't have a base fee, and will also autofill the `NetworkID` field.
+- `simulate`: A new RPC that executes a [dry run of a transaction submission](https://github.com/XRPLF/XRPL-Standards/tree/master/XLS-0069d-simulate#2-rpc-simulate). ([#5069](https://github.com/XRPLF/rippled/pull/5069))
+- Signing methods (`sign`, `sign_for`, `submit`): Autofill fees better, properly handle transactions without a base fee, and autofill the `NetworkID` field. ([#5069](https://github.com/XRPLF/rippled/pull/5069))
+- `ledger_entry`: `state` is added as an alias for `ripple_state`. ([#5199](https://github.com/XRPLF/rippled/pull/5199))
+- `ledger`, `ledger_data`, `account_objects`: Support filtering ledger entry types by their canonical names (case-insensitive). ([#5271](https://github.com/XRPLF/rippled/pull/5271))
+- `validators`: Added new field `validator_list_threshold` in response. ([#5112](https://github.com/XRPLF/rippled/pull/5112))
+- `server_info`: Added git commit hash info on admin connection. ([#5225](https://github.com/XRPLF/rippled/pull/5225))
+- `server_definitions`: Changed larger `UInt` serialized types to `Hash`. ([#5231](https://github.com/XRPLF/rippled/pull/5231))
+
+## XRP Ledger server version 2.3.1
+
+[Version 2.3.1](https://github.com/XRPLF/rippled/releases/tag/2.3.1) was released on Jan 29, 2025.
+
+This release contains bug fixes only and no API changes.
 
 ## XRP Ledger server version 2.3.0
 
@@ -109,19 +125,30 @@ As of 2025-04-04, version 2.5.0 is in development. You can use a pre-release ver
 
 ### Breaking changes in 2.3.0
 
-- `book_changes`: If the requested ledger version is not available on this node, a `ledgerNotFound` error is returned and the node does not attempt to acquire the ledger from the p2p network (as with other non-admin RPCs).
-
-Admins can still attempt to retrieve old ledgers with the `ledger_request` RPC.
+- `book_changes`: If the requested ledger version is not available on this node, a `ledgerNotFound` error is returned and the node does not attempt to acquire the ledger from the p2p network (as with other non-admin RPCs). Admins can still attempt to retrieve old ledgers with the `ledger_request` RPC.
 
 ### Additions and bugfixes in 2.3.0
 
-- `book_changes`: Returns a `validated` field in its response, which was missing in prior versions.
+- `book_changes`: Returns a `validated` field in its response. ([#5096](https://github.com/XRPLF/rippled/pull/5096))
+- `book_changes`: Accepts shortcut strings (`current`, `closed`, `validated`) for the `ledger_index` parameter. ([#5096](https://github.com/XRPLF/rippled/pull/5096))
+- `server_definitions`: Include `index` in response. ([#5190](https://github.com/XRPLF/rippled/pull/5190))
+- `account_nfts`: Fix issue where unassociated marker would return incorrect results. ([#5045](https://github.com/XRPLF/rippled/pull/5045))
+- `account_objects`: Fix issue where invalid marker would not return an error. ([#5046](https://github.com/XRPLF/rippled/pull/5046))
+- `account_objects`: Disallow filtering by ledger entry types that an account cannot hold. ([#5056](https://github.com/XRPLF/rippled/pull/5056))
+- `tx`: Allow lowercase CTID. ([#5049](https://github.com/XRPLF/rippled/pull/5049))
+- `feature`: Better error handling for invalid values of `feature`. ([#5063](https://github.com/XRPLF/rippled/pull/5063))
 
 ## XRP Ledger server version 2.2.0
 
 [Version 2.2.0](https://github.com/XRPLF/rippled/releases/tag/2.2.0) was released on Jun 5, 2024. The following additions are non-breaking (because they are purely additive):
 
-- The `feature` method now has a non-admin mode for users. (It was previously only available to admin connections.) The method returns an updated list of amendments, including their names and other information. ([#4781](https://github.com/XRPLF/rippled/pull/4781))
+- `feature`: Add a non-admin mode for users. (It was previously only available to admin connections.) The method returns an updated list of amendments, including their names and other information. ([#4781](https://github.com/XRPLF/rippled/pull/4781))
+
+## XRP Ledger server version 2.0.1
+
+[Version 2.0.1](https://github.com/XRPLF/rippled/releases/tag/2.0.1) was released on Jan 29, 2024. The following additions are non-breaking:
+
+- `path_find`: Fixes unbounded memory growth. ([#4822](https://github.com/XRPLF/rippled/pull/4822))
 
 ## XRP Ledger server version 2.0.0
 
@@ -129,24 +156,18 @@ Admins can still attempt to retrieve old ledgers with the `ledger_request` RPC.
 
 - `server_definitions`: A new RPC that generates a `definitions.json`-like output that can be used in XRPL libraries.
 - In `Payment` transactions, `DeliverMax` has been added. This is a replacement for the `Amount` field, which should not be used. Typically, the `delivered_amount` (in transaction metadata) should be used. To ease the transition, `DeliverMax` is present regardless of API version, since adding a field is non-breaking.
-- API version 2 has been moved from beta to supported, meaning that it is generally available (regardless of the `beta_rpc_api` setting).
-
-## XRP Ledger server version 2.2.0
-
-The following is a non-breaking addition to the API.
-
-- The `feature` method now has a non-admin mode for users. (It was previously only available to admin connections.) The method returns an updated list of amendments, including their names and other information. ([#4781](https://github.com/XRPLF/rippled/pull/4781))
+- API version 2 has been moved from beta to supported, meaning that it is generally available (regardless of the `beta_rpc_api` setting). The full list of changes is in [API-VERSION-2.md](API-VERSION-2.md).
 
 ## XRP Ledger server version 1.12.0
 
-[Version 1.12.0](https://github.com/XRPLF/rippled/releases/tag/1.12.0) was released on Sep 6, 2023. The following additions are non-breaking (because they are purely additive).
+[Version 1.12.0](https://github.com/XRPLF/rippled/releases/tag/1.12.0) was released on Sep 6, 2023. The following additions are non-breaking (because they are purely additive):
 
-- `server_info`: Added `ports`, an array which advertises the RPC and WebSocket ports. This information is also included in the `/crawl` endpoint (which calls `server_info` internally). `grpc` and `peer` ports are also included. (https://github.com/XRPLF/rippled/pull/4427)
+- `server_info`: Added `ports`, an array which advertises the RPC and WebSocket ports. This information is also included in the `/crawl` endpoint (which calls `server_info` internally). `grpc` and `peer` ports are also included. ([#4427](https://github.com/XRPLF/rippled/pull/4427))
   - `ports` contains objects, each containing a `port` for the listening port (a number string), and a `protocol` array listing the supported protocols on that port.
   - This allows crawlers to build a more detailed topology without needing to port-scan nodes.
   - (For peers and other non-admin clients, the info about admin ports is excluded.)
-- Clawback: The following additions are gated by the Clawback amendment (`featureClawback`). (https://github.com/XRPLF/rippled/pull/4553)
-  - Adds an [AccountRoot flag](https://xrpl.org/accountroot.html#accountroot-flags) called `lsfAllowTrustLineClawback` (https://github.com/XRPLF/rippled/pull/4617)
+- Clawback: The following additions are gated by the Clawback amendment (`featureClawback`). ([#4553](https://github.com/XRPLF/rippled/pull/4553))
+  - Adds an [AccountRoot flag](https://xrpl.org/accountroot.html#accountroot-flags) called `lsfAllowTrustLineClawback`. ([#4617](https://github.com/XRPLF/rippled/pull/4617))
     - Adds the corresponding `asfAllowTrustLineClawback` [AccountSet Flag](https://xrpl.org/accountset.html#accountset-flags) as well.
     - Clawback is disabled by default, so if an issuer desires the ability to claw back funds, they must use an `AccountSet` transaction to set the AllowTrustLineClawback flag. They must do this before creating any trust lines, offers, escrows, payment channels, or checks.
   - Adds the [Clawback transaction type](https://github.com/XRPLF/XRPL-Standards/blob/master/XLS-39d-clawback/README.md#331-clawback-transaction), containing these fields:
@@ -181,16 +202,16 @@ The following is a non-breaking addition to the API.
 
 ### Breaking changes in 1.11
 
-- Added the ability to mark amendments as obsolete. For the `feature` admin API, there is a new possible value for the `vetoed` field. (https://github.com/XRPLF/rippled/pull/4291)
+- Added the ability to mark amendments as obsolete. For the `feature` admin API, there is a new possible value for the `vetoed` field. ([#4291](https://github.com/XRPLF/rippled/pull/4291))
   - The value of `vetoed` can now be `true`, `false`, or `"Obsolete"`.
-- Removed the acceptance of seeds or public keys in place of account addresses. (https://github.com/XRPLF/rippled/pull/4404)
+- Removed the acceptance of seeds or public keys in place of account addresses. ([#4404](https://github.com/XRPLF/rippled/pull/4404))
   - This simplifies the API and encourages better security practices (i.e. seeds should never be sent over the network).
-- For the `ledger_data` method, when all entries are filtered out, the `state` field of the response is now an empty list (in other words, an empty array, `[]`). (Previously, it would return `null`.) While this is technically a breaking change, the new behavior is consistent with the documentation, so this is considered only a bug fix. (https://github.com/XRPLF/rippled/pull/4398)
+- For the `ledger_data` method, when all entries are filtered out, the `state` field of the response is now an empty list (in other words, an empty array, `[]`). (Previously, it would return `null`.) While this is technically a breaking change, the new behavior is consistent with the documentation, so this is considered only a bug fix. ([#4398](https://github.com/XRPLF/rippled/pull/4398))
 - If and when the `fixNFTokenRemint` amendment activates, there will be a new AccountRoot field, `FirstNFTSequence`. This field is set to the current account sequence when the account issues their first NFT. If an account has not issued any NFTs, then the field is not set. ([#4406](https://github.com/XRPLF/rippled/pull/4406))
   - There is a new account deletion restriction: an account can only be deleted if `FirstNFTSequence` + `MintedNFTokens` + `256` is less than the current ledger sequence.
   - This is potentially a breaking change if clients have logic for determining whether an account can be deleted.
 - NetworkID
-  - For sidechains and networks with a network ID greater than 1024, there is a new [transaction common field](https://xrpl.org/transaction-common-fields.html), `NetworkID`. (https://github.com/XRPLF/rippled/pull/4370)
+  - For sidechains and networks with a network ID greater than 1024, there is a new [transaction common field](https://xrpl.org/transaction-common-fields.html), `NetworkID`. ([#4370](https://github.com/XRPLF/rippled/pull/4370))
     - This field helps to prevent replay attacks and is now required for chains whose network ID is 1025 or higher.
     - The field must be omitted for Mainnet, so there is no change for Mainnet users.
   - There are three new local error codes:
@@ -200,10 +221,10 @@ The following is a non-breaking addition to the API.
 
 ### Additions and bug fixes in 1.11
 
-- Added `nftoken_id`, `nftoken_ids` and `offer_id` meta fields into NFT `tx` and `account_tx` responses. (https://github.com/XRPLF/rippled/pull/4447)
-- Added an `account_flags` object to the `account_info` method response. (https://github.com/XRPLF/rippled/pull/4459)
-- Added `NFTokenPages` to the `account_objects` RPC. (https://github.com/XRPLF/rippled/pull/4352)
-- Fixed: `marker` returned from the `account_lines` command would not work on subsequent commands. (https://github.com/XRPLF/rippled/pull/4361)
+- Added `nftoken_id`, `nftoken_ids` and `offer_id` meta fields into NFT `tx` and `account_tx` responses. ([#4447](https://github.com/XRPLF/rippled/pull/4447))
+- Added an `account_flags` object to the `account_info` method response. ([#4459](https://github.com/XRPLF/rippled/pull/4459))
+- Added `NFTokenPages` to the `account_objects` RPC. ([#4352](https://github.com/XRPLF/rippled/pull/4352))
+- Fixed: `marker` returned from the `account_lines` command would not work on subsequent commands. ([#4361](https://github.com/XRPLF/rippled/pull/4361))
 
 ## XRP Ledger server version 1.10.0
 

API-VERSION-2.md

@@ -0,0 +1,66 @@
+# API Version 2
+
+API version 2 is available in `rippled` version 2.0.0 and later. To use this API, clients specify `"api_version" : 2` in each request.
+
+For info about how [API versioning](https://xrpl.org/request-formatting.html#api-versioning) works, including examples, please view the [XLS-22d spec](https://github.com/XRPLF/XRPL-Standards/discussions/54). For details about the implementation of API versioning, view the [implementation PR](https://github.com/XRPLF/rippled/pull/3155). API versioning ensures existing integrations and users continue to receive existing behavior, while those that request a higher API version will experience new behavior.
+
+## Removed methods
+
+In API version 2, the following deprecated methods are no longer available: ([#4759](https://github.com/XRPLF/rippled/pull/4759))
+
+- `tx_history` - Instead, use other methods such as `account_tx` or `ledger` with the `transactions` field set to `true`.
+- `ledger_header` - Instead, use the `ledger` method.
+
+## Modifications to JSON transaction element in API version 2
+
+In API version 2, JSON elements for transaction output have been changed and made consistent for all methods which output transactions. ([#4775](https://github.com/XRPLF/rippled/pull/4775))
+This helps to unify the JSON serialization format of transactions. ([clio#722](https://github.com/XRPLF/clio/issues/722), [#4727](https://github.com/XRPLF/rippled/issues/4727))
+
+- JSON transaction element is named `tx_json`
+- Binary transaction element is named `tx_blob`
+- JSON transaction metadata element is named `meta`
+- Binary transaction metadata element is named `meta_blob`
+
+Additionally, these elements are now consistently available next to `tx_json` (i.e. sibling elements), where possible:
+
+- `hash` - Transaction ID. This data was stored inside transaction output in API version 1, but in API version 2 is a sibling element.
+- `ledger_index` - Ledger index (only set on validated ledgers)
+- `ledger_hash` - Ledger hash (only set on closed or validated ledgers)
+- `close_time_iso` - Ledger close time expressed in ISO 8601 time format (only set on validated ledgers)
+- `validated` - Bool element set to `true` if the transaction is in a validated ledger, otherwise `false`
+
+This change affects the following methods:
+
+- `tx` - Transaction data moved into element `tx_json` (was inline inside `result`) or, if binary output was requested, moved from `tx` to `tx_blob`. Renamed binary transaction metadata element (if it was requested) from `meta` to `meta_blob`. Changed location of `hash` and added new elements
+- `account_tx` - Renamed transaction element from `tx` to `tx_json`. Renamed binary transaction metadata element (if it was requested) from `meta` to `meta_blob`. Changed location of `hash` and added new elements
+- `transaction_entry` - Renamed transaction metadata element from `metadata` to `meta`. Changed location of `hash` and added new elements
+- `subscribe` - Renamed transaction element from `transaction` to `tx_json`. Changed location of `hash` and added new elements
+- `sign`, `sign_for`, `submit` and `submit_multisigned` - Changed location of `hash` element.
+
+## Modifications to `Payment` transaction JSON schema
+
+When reading Payments, the `Amount` field should generally **not** be used. Instead, use [delivered_amount](https://xrpl.org/partial-payments.html#the-delivered_amount-field) to see the amount that the Payment delivered. To clarify its meaning, the `Amount` field is being renamed to `DeliverMax`. ([#4733](https://github.com/XRPLF/rippled/pull/4733))
+
+- In `Payment` transaction type, JSON RPC field `Amount` is renamed to `DeliverMax`. To enable smooth client transition, `Amount` is still handled, as described below: ([#4733](https://github.com/XRPLF/rippled/pull/4733))
+  - On JSON RPC input (e.g. `submit_multisigned` etc. methods), `Amount` is recognized as an alias to `DeliverMax` for both API version 1 and version 2 clients.
+  - On JSON RPC input, submitting both `Amount` and `DeliverMax` fields is allowed _only_ if they are identical; otherwise such input is rejected with `rpcINVALID_PARAMS` error.
+  - On JSON RPC output (e.g. `subscribe`, `account_tx` etc. methods), `DeliverMax` is present in both API version 1 and version 2.
+  - On JSON RPC output, `Amount` is only present in API version 1 and _not_ in version 2.
+
+## Modifications to account_info response
+
+- `signer_lists` is returned in the root of the response. (In API version 1, it was nested under `account_data`.) ([#3770](https://github.com/XRPLF/rippled/pull/3770))
+- When using an invalid `signer_lists` value, the API now returns an "invalidParams" error. ([#4585](https://github.com/XRPLF/rippled/pull/4585))
+  - (`signer_lists` must be a boolean. In API version 1, strings were accepted and may return a normal response - i.e. as if `signer_lists` were `true`.)
+
+## Modifications to [account_tx](https://xrpl.org/account_tx.html#account_tx) response
+
+- Using `ledger_index_min`, `ledger_index_max`, and `ledger_index` returns `invalidParams` because if you use `ledger_index_min` or `ledger_index_max`, then it does not make sense to also specify `ledger_index`. In API version 1, no error was returned. ([#4571](https://github.com/XRPLF/rippled/pull/4571))
+  - The same applies for `ledger_index_min`, `ledger_index_max`, and `ledger_hash`. ([#4545](https://github.com/XRPLF/rippled/issues/4545#issuecomment-1565065579))
+- Using a `ledger_index_min` or `ledger_index_max` beyond the range of ledgers that the server has:
+  - returns `lgrIdxMalformed` in API version 2. Previously, in API version 1, no error was returned. ([#4288](https://github.com/XRPLF/rippled/issues/4288))
+- Attempting to use a non-boolean value (such as a string) for the `binary` or `forward` parameters returns `invalidParams` (`rpcINVALID_PARAMS`). Previously, in API version 1, no error was returned. ([#4620](https://github.com/XRPLF/rippled/pull/4620))
+
+## Modifications to [noripple_check](https://xrpl.org/noripple_check.html#noripple_check) response
+
+- Attempting to use a non-boolean value (such as a string) for the `transactions` parameter returns `invalidParams` (`rpcINVALID_PARAMS`). Previously, in API version 1, no error was returned. ([#4620](https://github.com/XRPLF/rippled/pull/4620))

API-VERSION-3.md

@@ -0,0 +1,27 @@
+# API Version 3
+
+API version 3 is currently a **beta API**. It requires enabling `[beta_rpc_api]` in the rippled configuration to use. To use this API, clients specify `"api_version" : 3` in each request.
+
+For info about how [API versioning](https://xrpl.org/request-formatting.html#api-versioning) works, including examples, please view the [XLS-22d spec](https://github.com/XRPLF/XRPL-Standards/discussions/54). For details about the implementation of API versioning, view the [implementation PR](https://github.com/XRPLF/rippled/pull/3155). API versioning ensures existing integrations and users continue to receive existing behavior, while those that request a higher API version will experience new behavior.
+
+## Breaking Changes
+
+### Modifications to `amm_info`
+
+The order of error checks has been changed to provide more specific error messages. ([#4924](https://github.com/XRPLF/rippled/pull/4924))
+
+- **Before (API v2)**: When sending an invalid account or asset to `amm_info` while other parameters are not set as expected, the method returns a generic `rpcINVALID_PARAMS` error.
+- **After (API v3)**: The same scenario returns a more specific error: `rpcISSUE_MALFORMED` for malformed assets or `rpcACT_MALFORMED` for malformed accounts.
+
+### Modifications to `ledger_entry`
+
+Added support for string shortcuts to look up fixed-location ledger entries using the `"index"` parameter. ([#5644](https://github.com/XRPLF/rippled/pull/5644))
+
+In API version 3, the following string values can be used with the `"index"` parameter:
+
+- `"index": "amendments"` - Returns the `Amendments` ledger entry
+- `"index": "fee"` - Returns the `FeeSettings` ledger entry
+- `"index": "nunl"` - Returns the `NegativeUNL` ledger entry
+- `"index": "hashes"` - Returns the "short" `LedgerHashes` ledger entry (recent ledger hashes)
+
+These shortcuts are only available in API version 3 and later. In API versions 1 and 2, these string values would result in an error.

BUILD.md

@@ -148,8 +148,8 @@ function extract_version {
 }
 
 # Define which recipes to export.
-recipes=('ed25519' 'grpc' 'openssl' 'secp256k1' 'snappy' 'soci')
-folders=('all'     'all'  '3.x.x'   'all'       'all'    'all')
+recipes=('ed25519' 'grpc' 'nudb' 'openssl' 'secp256k1' 'snappy' 'soci')
+folders=('all'     'all'  'all'  '3.x.x'   'all'       'all'    'all')
 
 # Selectively check out the recipes from our CCI fork.
 cd external
@@ -368,6 +368,36 @@ The workaround for this error is to add two lines to your profile:
 tools.build:cxxflags=['-DBOOST_ASIO_DISABLE_CONCEPTS']
 ```
 
+### Set Up Ccache
+
+To speed up repeated compilations, we recommend that you install
+[ccache](https://ccache.dev), a tool that wraps your compiler so that it can
+cache build objects locally.
+
+#### Linux
+
+You can install it using the package manager, e.g. `sudo apt install ccache`
+(Ubuntu) or `sudo dnf install ccache` (RHEL).
+
+#### macOS
+
+You can install it using Homebrew, i.e. `brew install ccache`.
+
+#### Windows
+
+You can install it using Chocolatey, i.e. `choco install ccache`. If you already
+have Ccache installed, then `choco upgrade ccache` will update it to the latest
+version. However, if you see an error such as:
+
+```
+terminate called after throwing an instance of 'std::bad_alloc'
+      what():  std::bad_alloc
+C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(617,5): error MSB6006: "cl.exe" exited with code 3.
+```
+
+then please install a specific version of Ccache that we know works, via: `choco
+install ccache --version 4.11.3 --allow-downgrade`.
+
 ### Build and Test
 
 1. Create a build directory and move into it.
@@ -550,10 +580,10 @@ See [Sanitizers docs](./docs/build/sanitizers.md) for more details.
 | `werr`     | OFF           | Treat compilation warnings as errors                           |
 | `wextra`   | OFF           | Enable additional compilation warnings                         |
 
-[Unity builds][5] may be faster for the first build
-(at the cost of much more memory) since they concatenate sources into fewer
-translation units. Non-unity builds may be faster for incremental builds,
-and can be helpful for detecting `#include` omissions.
+[Unity builds][5] may be faster for the first build (at the cost of much more
+memory) since they concatenate sources into fewer translation units. Non-unity
+builds may be faster for incremental builds, and can be helpful for detecting
+`#include` omissions.
 
 ## Troubleshooting
 

CMakeLists.txt

@@ -1,20 +1,23 @@
 cmake_minimum_required(VERSION 3.16)
 
 if(POLICY CMP0074)
-  cmake_policy(SET CMP0074 NEW)
+    cmake_policy(SET CMP0074 NEW)
 endif()
 if(POLICY CMP0077)
-  cmake_policy(SET CMP0077 NEW)
+    cmake_policy(SET CMP0077 NEW)
 endif()
 
 # Fix "unrecognized escape" issues when passing CMAKE_MODULE_PATH on Windows.
-file(TO_CMAKE_PATH "${CMAKE_MODULE_PATH}" CMAKE_MODULE_PATH)
+if(DEFINED CMAKE_MODULE_PATH)
+    file(TO_CMAKE_PATH "${CMAKE_MODULE_PATH}" CMAKE_MODULE_PATH)
+endif()
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
 project(xrpl)
 set(CMAKE_CXX_EXTENSIONS OFF)
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 include(CompilationEnv)
 
@@ -33,51 +36,40 @@ endif()
 # Enable ccache to speed up builds.
 include(Ccache)
 
-# make GIT_COMMIT_HASH define available to all sources
-find_package(Git)
-if(Git_FOUND)
-    execute_process(COMMAND ${GIT_EXECUTABLE} --git-dir=${CMAKE_CURRENT_SOURCE_DIR}/.git rev-parse HEAD
-        OUTPUT_STRIP_TRAILING_WHITESPACE OUTPUT_VARIABLE gch)
-    if(gch)
-        set(GIT_COMMIT_HASH "${gch}")
-        message(STATUS gch: ${GIT_COMMIT_HASH})
-        add_definitions(-DGIT_COMMIT_HASH="${GIT_COMMIT_HASH}")
-    endif()
-
-    execute_process(COMMAND ${GIT_EXECUTABLE} --git-dir=${CMAKE_CURRENT_SOURCE_DIR}/.git rev-parse --abbrev-ref HEAD
-        OUTPUT_STRIP_TRAILING_WHITESPACE OUTPUT_VARIABLE gb)
-    if(gb)
-        set(GIT_BRANCH "${gb}")
-        message(STATUS gb: ${GIT_BRANCH})
-        add_definitions(-DGIT_BRANCH="${GIT_BRANCH}")
-    endif()
-endif() #git
-
 if(thread_safety_analysis)
-  add_compile_options(-Wthread-safety -D_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS -DXRPL_ENABLE_THREAD_SAFETY_ANNOTATIONS)
-  add_compile_options("-stdlib=libc++")
-  add_link_options("-stdlib=libc++")
+    add_compile_options(
+        -Wthread-safety
+        -D_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS
+        -DXRPL_ENABLE_THREAD_SAFETY_ANNOTATIONS
+    )
+    add_compile_options("-stdlib=libc++")
+    add_link_options("-stdlib=libc++")
 endif()
 
-include (CheckCXXCompilerFlag)
-include (FetchContent)
-include (ExternalProject)
-include (CMakeFuncs) # must come *after* ExternalProject b/c it overrides one function in EP
-if (target)
-  message (FATAL_ERROR "The target option has been removed - use native cmake options to control build")
-endif ()
+include(CheckCXXCompilerFlag)
+include(FetchContent)
+include(ExternalProject)
+include(CMakeFuncs) # must come *after* ExternalProject b/c it overrides one function in EP
+if(target)
+    message(
+        FATAL_ERROR
+        "The target option has been removed - use native cmake options to control build"
+    )
+endif()
 
 include(XrplSanity)
 include(XrplVersion)
 include(XrplSettings)
-# this check has to remain in the top-level cmake
-# because of the early return statement
-if (packages_only)
-  if (NOT TARGET rpm)
-    message (FATAL_ERROR "packages_only requested, but targets were not created - is docker installed?")
-  endif()
-  return ()
-endif ()
+# this check has to remain in the top-level cmake because of the early return statement
+if(packages_only)
+    if(NOT TARGET rpm)
+        message(
+            FATAL_ERROR
+            "packages_only requested, but targets were not created - is docker installed?"
+        )
+    endif()
+    return()
+endif()
 include(XrplCompiler)
 include(XrplSanitizers)
 include(XrplInterface)
@@ -85,11 +77,9 @@ include(XrplInterface)
 option(only_docs "Include only the docs target?" FALSE)
 include(XrplDocs)
 if(only_docs)
-  return()
+    return()
 endif()
 
-###
-
 include(deps/Boost)
 
 add_subdirectory(external/antithesis-sdk)
@@ -105,45 +95,59 @@ find_package(SOCI REQUIRED)
 find_package(SQLite3 REQUIRED)
 find_package(xxHash REQUIRED)
 
-target_link_libraries(xrpl_libs INTERFACE
-  ed25519::ed25519
-  lz4::lz4
-  OpenSSL::Crypto
-  OpenSSL::SSL
-  secp256k1::secp256k1
-  soci::soci
-  SQLite::SQLite3
+target_link_libraries(
+    xrpl_libs
+    INTERFACE
+        ed25519::ed25519
+        lz4::lz4
+        OpenSSL::Crypto
+        OpenSSL::SSL
+        secp256k1::secp256k1
+        soci::soci
+        SQLite::SQLite3
 )
 
 option(rocksdb "Enable RocksDB" ON)
 if(rocksdb)
     find_package(RocksDB REQUIRED)
-    set_target_properties(RocksDB::rocksdb PROPERTIES
-            INTERFACE_COMPILE_DEFINITIONS XRPL_ROCKSDB_AVAILABLE=1
+    set_target_properties(
+        RocksDB::rocksdb
+        PROPERTIES INTERFACE_COMPILE_DEFINITIONS XRPL_ROCKSDB_AVAILABLE=1
     )
     target_link_libraries(xrpl_libs INTERFACE RocksDB::rocksdb)
 endif()
 
+# OpenTelemetry distributed tracing (optional).
+# When ON, links against opentelemetry-cpp and defines XRPL_ENABLE_TELEMETRY
+# so that tracing macros in TracingInstrumentation.h are compiled in.
+# When OFF (default), all tracing code compiles to no-ops with zero overhead.
+# Enable via: conan install -o telemetry=True, or cmake -Dtelemetry=ON.
+option(telemetry "Enable OpenTelemetry tracing" OFF)
+if(telemetry)
+    find_package(opentelemetry-cpp CONFIG REQUIRED)
+    add_compile_definitions(XRPL_ENABLE_TELEMETRY)
+    message(STATUS "OpenTelemetry tracing enabled")
+endif()
+
 # Work around changes to Conan recipe for now.
 if(TARGET nudb::core)
-  set(nudb nudb::core)
+    set(nudb nudb::core)
 elseif(TARGET NuDB::nudb)
-  set(nudb NuDB::nudb)
+    set(nudb NuDB::nudb)
 else()
-  message(FATAL_ERROR "unknown nudb target")
+    message(FATAL_ERROR "unknown nudb target")
 endif()
 target_link_libraries(xrpl_libs INTERFACE ${nudb})
 
 if(coverage)
-  include(XrplCov)
+    include(XrplCov)
 endif()
 
-set(PROJECT_EXPORT_SET XrplExports)
 include(XrplCore)
 include(XrplInstall)
 include(XrplValidatorKeys)
 
 if(tests)
-  include(CTest)
-  add_subdirectory(src/tests/libxrpl)
+    include(CTest)
+    add_subdirectory(src/tests/libxrpl)
 endif()

CONTRIBUTING.md

@@ -219,7 +219,7 @@ coherent rather than a set of _thou shalt not_ commandments.
 
 ## Formatting
 
-All code must conform to `clang-format` version 18,
+All code must conform to `clang-format` version 21,
 according to the settings in [`.clang-format`](./.clang-format),
 unless the result would be unreasonably difficult to read or maintain.
 To demarcate lines that should be left as-is, surround them with comments like
@@ -872,7 +872,8 @@ git push --delete upstream-push master-next
 11. [Create a new release on
     Github](https://github.com/XRPLF/rippled/releases). Be sure that
     "Set as the latest release" is checked.
-12. Finally [reverse merge the release into `develop`](#follow-up-reverse-merge).
+12. Open a PR to update the [API-CHANGELOG](API-CHANGELOG.md) and `API-VERSION-[n].md` with the changes for this release (if any are missing).
+13. Finally, [reverse merge the release into `develop`](#follow-up-reverse-merge).
 
 #### Special cases: point releases, hotfixes, etc.
 

OpenTelemetryPlan/00-tracing-fundamentals.md

@@ -0,0 +1,244 @@
+# Distributed Tracing Fundamentals
+
+> **Parent Document**: [OpenTelemetryPlan.md](./OpenTelemetryPlan.md)
+> **Next**: [Architecture Analysis](./01-architecture-analysis.md)
+
+---
+
+## What is Distributed Tracing?
+
+Distributed tracing is a method for tracking data objects as they flow through distributed systems. In a network like XRP Ledger, a single transaction touches multiple independent nodes—each with no shared memory or logging. Distributed tracing connects these dots.
+
+**Without tracing:** You see isolated logs on each node with no way to correlate them.
+
+**With tracing:** You see the complete journey of a transaction or an event across all nodes it touched.
+
+---
+
+## Core Concepts
+
+### 1. Trace
+
+A **trace** represents the entire journey of a request through the system. It has a unique `trace_id` that stays constant across all nodes.
+
+```
+Trace ID: abc123
+├── Node A: received transaction
+├── Node B: relayed transaction
+├── Node C: included in consensus
+└── Node D: applied to ledger
+```
+
+### 2. Span
+
+A **span** represents a single unit of work within a trace. Each span has:
+
+| Attribute        | Description           | Example                    |
+| ---------------- | --------------------- | -------------------------- |
+| `trace_id`       | Links to parent trace | `abc123`                   |
+| `span_id`        | Unique identifier     | `span456`                  |
+| `parent_span_id` | Parent span (if any)  | `p_span123`                |
+| `name`           | Operation name        | `rpc.submit`               |
+| `start_time`     | When work began       | `2024-01-15T10:30:00Z`     |
+| `end_time`       | When work completed   | `2024-01-15T10:30:00.050Z` |
+| `attributes`     | Key-value metadata    | `tx.hash=ABC...`           |
+| `status`         | OK, ERROR MSG         | `OK`                       |
+
+### 3. Trace Context
+
+**Trace context** is the data that propagates between services to link spans together. It contains:
+
+- `trace_id` - The trace this span belongs to
+- `span_id` - The current span (becomes parent for child spans)
+- `trace_flags` - Sampling decisions
+
+---
+
+## How Spans Form a Trace
+
+Spans have parent-child relationships forming a tree structure:
+
+```mermaid
+flowchart TB
+    subgraph trace["Trace: abc123"]
+        A["tx.submit<br/>span_id: 001<br/>50ms"] --> B["tx.validate<br/>span_id: 002<br/>5ms"]
+        A --> C["tx.relay<br/>span_id: 003<br/>10ms"]
+        A --> D["tx.apply<br/>span_id: 004<br/>30ms"]
+        D --> E["ledger.update<br/>span_id: 005<br/>20ms"]
+    end
+
+    style A fill:#0d47a1,stroke:#082f6a,color:#ffffff
+    style B fill:#1b5e20,stroke:#0d3d14,color:#ffffff
+    style C fill:#1b5e20,stroke:#0d3d14,color:#ffffff
+    style D fill:#1b5e20,stroke:#0d3d14,color:#ffffff
+    style E fill:#bf360c,stroke:#8c2809,color:#ffffff
+```
+
+The same trace visualized as a **timeline (Gantt chart)**:
+
+```
+Time →   0ms    10ms    20ms    30ms    40ms    50ms
+         ├───────────────────────────────────────────┤
+tx.submit│▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓│
+         ├─────┤
+tx.valid │▓▓▓▓▓│
+         │     ├──────────┤
+tx.relay │     │▓▓▓▓▓▓▓▓▓▓│
+         │               ├────────────────────────────┤
+tx.apply │               │▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓│
+         │                         ├──────────────────┤
+ledger   │                         │▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓│
+```
+
+---
+
+## Distributed Traces Across Nodes
+
+In distributed systems like rippled, traces span **multiple independent nodes**. The trace context must be propagated in network messages:
+
+```mermaid
+sequenceDiagram
+    participant Client
+    participant NodeA as Node A
+    participant NodeB as Node B
+    participant NodeC as Node C
+
+    Client->>NodeA: Submit TX<br/>(no trace context)
+
+    Note over NodeA: Creates new trace<br/>trace_id: abc123<br/>span: tx.receive
+
+    NodeA->>NodeB: Relay TX<br/>(trace_id: abc123, parent: 001)
+
+    Note over NodeB: Creates child span<br/>span: tx.relay<br/>parent_span_id: 001
+
+    NodeA->>NodeC: Relay TX<br/>(trace_id: abc123, parent: 001)
+
+    Note over NodeC: Creates child span<br/>span: tx.relay<br/>parent_span_id: 001
+
+    Note over NodeA,NodeC: All spans share trace_id: abc123<br/>enabling correlation across nodes
+```
+
+---
+
+## Context Propagation
+
+For traces to work across nodes, **trace context must be propagated** in messages.
+
+### What's in the Context (32 bytes)
+
+| Field         | Size       | Description                                             |
+| ------------- | ---------- | ------------------------------------------------------- |
+| `trace_id`    | 16 bytes   | Identifies the entire trace (constant across all nodes) |
+| `span_id`     | 8 bytes    | The sender's current span (becomes parent on receiver)  |
+| `trace_flags` | 4 bytes    | Sampling decision flags                                 |
+| `trace_state` | ~0-4 bytes | Optional vendor-specific data                           |
+
+### How span_id Changes at Each Hop
+
+Only **one** `span_id` travels in the context - the sender's current span. Each node:
+
+1. Extracts the received `span_id` and uses it as the `parent_span_id`
+2. Creates a **new** `span_id` for its own span
+3. Sends its own `span_id` as the parent when forwarding
+
+```
+Node A                      Node B                      Node C
+──────                      ──────                      ──────
+
+Span AAA                    Span BBB                    Span CCC
+   │                           │                           │
+   ▼                           ▼                           ▼
+Context out:                Context out:                Context out:
+├─ trace_id: abc123         ├─ trace_id: abc123         ├─ trace_id: abc123
+├─ span_id: AAA ──────────► ├─ span_id: BBB ──────────► ├─ span_id: CCC ──────►
+└─ flags: 01                └─ flags: 01                └─ flags: 01
+                               │                           │
+                          parent = AAA               parent = BBB
+```
+
+The `trace_id` stays constant, but `span_id` **changes at every hop** to maintain the parent-child chain.
+
+### Propagation Formats
+
+There are two patterns:
+
+### HTTP/RPC Headers (W3C Trace Context)
+
+```
+traceparent: 00-abc123def456-span789-01
+             │  │             │      │
+             │  │             │      └── Flags (sampled)
+             │  │             └── Parent span ID
+             │  └── Trace ID
+             └── Version
+```
+
+### Protocol Buffers (rippled P2P messages)
+
+```protobuf
+message TMTransaction {
+    bytes rawTransaction = 1;
+    // ... existing fields ...
+
+    // Trace context extension
+    bytes trace_parent = 100;  // W3C traceparent
+    bytes trace_state = 101;   // W3C tracestate
+}
+```
+
+---
+
+## Sampling
+
+Not every trace needs to be recorded. **Sampling** reduces overhead:
+
+### Head Sampling (at trace start)
+
+```
+Request arrives → Random 10% chance → Record or skip entire trace
+```
+
+- ✅ Low overhead
+- ❌ May miss interesting traces
+
+### Tail Sampling (after trace completes)
+
+```
+Trace completes → Collector evaluates:
+                  - Error? → KEEP
+                  - Slow? → KEEP
+                  - Normal? → Sample 10%
+```
+
+- ✅ Never loses important traces
+- ❌ Higher memory usage at collector
+
+---
+
+## Key Benefits for rippled
+
+| Challenge                          | How Tracing Helps                        |
+| ---------------------------------- | ---------------------------------------- |
+| "Where is my transaction?"         | Follow trace across all nodes it touched |
+| "Why was consensus slow?"          | See timing breakdown of each phase       |
+| "Which node is the bottleneck?"    | Compare span durations across nodes      |
+| "What happened during the outage?" | Correlate errors across the network      |
+
+---
+
+## Glossary
+
+| Term                | Definition                                                      |
+| ------------------- | --------------------------------------------------------------- |
+| **Trace**           | Complete journey of a request, identified by `trace_id`         |
+| **Span**            | Single operation within a trace                                 |
+| **Context**         | Data propagated between services (`trace_id`, `span_id`, flags) |
+| **Instrumentation** | Code that creates spans and propagates context                  |
+| **Collector**       | Service that receives, processes, and exports traces            |
+| **Backend**         | Storage/visualization system (Jaeger, Tempo, etc.)              |
+| **Head Sampling**   | Sampling decision at trace start                                |
+| **Tail Sampling**   | Sampling decision after trace completes                         |
+
+---
+
+_Next: [Architecture Analysis](./01-architecture-analysis.md)_ | _Back to: [Overview](./OpenTelemetryPlan.md)_

OpenTelemetryPlan/01-architecture-analysis.md

@@ -0,0 +1,330 @@
+# Architecture Analysis
+
+> **Parent Document**: [OpenTelemetryPlan.md](./OpenTelemetryPlan.md)
+> **Related**: [Design Decisions](./02-design-decisions.md) | [Implementation Strategy](./03-implementation-strategy.md)
+
+---
+
+## 1.1 Current rippled Architecture Overview
+
+The rippled node software consists of several interconnected components that need instrumentation for distributed tracing:
+
+```mermaid
+flowchart TB
+    subgraph rippled["rippled Node"]
+        subgraph services["Core Services"]
+            RPC["RPC Server<br/>(HTTP/WS/gRPC)"]
+            Overlay["Overlay<br/>(P2P Network)"]
+            Consensus["Consensus<br/>(RCLConsensus)"]
+        end
+
+        JobQueue["JobQueue<br/>(Thread Pool)"]
+
+        subgraph processing["Processing Layer"]
+            NetworkOPs["NetworkOPs<br/>(Tx Processing)"]
+            LedgerMaster["LedgerMaster<br/>(Ledger Mgmt)"]
+            NodeStore["NodeStore<br/>(Database)"]
+        end
+
+        subgraph observability["Existing Observability"]
+            PerfLog["PerfLog<br/>(JSON)"]
+            Insight["Insight<br/>(StatsD)"]
+            Logging["Logging<br/>(Journal)"]
+        end
+
+        services --> JobQueue
+        JobQueue --> processing
+    end
+
+    style rippled fill:#424242,stroke:#212121,color:#ffffff
+    style services fill:#1565c0,stroke:#0d47a1,color:#ffffff
+    style processing fill:#2e7d32,stroke:#1b5e20,color:#ffffff
+    style observability fill:#e65100,stroke:#bf360c,color:#ffffff
+```
+
+---
+
+## 1.2 Key Components for Instrumentation
+
+| Component         | Location                                   | Purpose                  | Trace Value                  |
+| ----------------- | ------------------------------------------ | ------------------------ | ---------------------------- |
+| **Overlay**       | `src/xrpld/overlay/`                       | P2P communication        | Message propagation timing   |
+| **PeerImp**       | `src/xrpld/overlay/detail/PeerImp.cpp`     | Individual peer handling | Per-peer latency             |
+| **RCLConsensus**  | `src/xrpld/app/consensus/RCLConsensus.cpp` | Consensus algorithm      | Round timing, phase analysis |
+| **NetworkOPs**    | `src/xrpld/app/misc/NetworkOPs.cpp`        | Transaction processing   | Tx lifecycle tracking        |
+| **ServerHandler** | `src/xrpld/rpc/detail/ServerHandler.cpp`   | RPC entry point          | Request latency              |
+| **RPCHandler**    | `src/xrpld/rpc/detail/RPCHandler.cpp`      | Command execution        | Per-command timing           |
+| **JobQueue**      | `src/xrpl/core/JobQueue.h`                 | Async task execution     | Queue wait times             |
+
+---
+
+## 1.3 Transaction Flow Diagram
+
+Transaction flow spans multiple nodes in the network. Each node creates linked spans to form a distributed trace:
+
+```mermaid
+sequenceDiagram
+    participant Client
+    participant PeerA as Peer A (Receive)
+    participant PeerB as Peer B (Relay)
+    participant PeerC as Peer C (Validate)
+
+    Client->>PeerA: 1. Submit TX
+
+    rect rgb(230, 245, 255)
+        Note over PeerA: tx.receive SPAN START
+        PeerA->>PeerA: HashRouter Deduplication
+        PeerA->>PeerA: tx.validate (child span)
+    end
+
+    PeerA->>PeerB: 2. Relay TX (with trace ctx)
+
+    rect rgb(230, 245, 255)
+        Note over PeerB: tx.receive (linked span)
+    end
+
+    PeerB->>PeerC: 3. Relay TX
+
+    rect rgb(230, 245, 255)
+        Note over PeerC: tx.receive (linked span)
+        PeerC->>PeerC: tx.process
+    end
+
+    Note over Client,PeerC: DISTRIBUTED TRACE (same trace_id: abc123)
+```
+
+### Trace Structure
+
+```
+trace_id: abc123
+├── span: tx.receive (Peer A)
+│   ├── span: tx.validate
+│   └── span: tx.relay
+├── span: tx.receive (Peer B) [parent: Peer A]
+│   └── span: tx.relay
+└── span: tx.receive (Peer C) [parent: Peer B]
+    └── span: tx.process
+```
+
+---
+
+## 1.4 Consensus Round Flow
+
+Consensus rounds are multi-phase operations that benefit significantly from tracing:
+
+```mermaid
+flowchart TB
+    subgraph round["consensus.round (root span)"]
+        attrs["Attributes:<br/>xrpl.consensus.ledger.seq = 12345678<br/>xrpl.consensus.mode = proposing<br/>xrpl.consensus.proposers = 35"]
+
+        subgraph open["consensus.phase.open"]
+            open_desc["Duration: ~3s<br/>Waiting for transactions"]
+        end
+
+        subgraph establish["consensus.phase.establish"]
+            est_attrs["proposals_received = 28<br/>disputes_resolved = 3"]
+            est_children["├── consensus.proposal.receive (×28)<br/>├── consensus.proposal.send (×1)<br/>└── consensus.dispute.resolve (×3)"]
+        end
+
+        subgraph accept["consensus.phase.accept"]
+            acc_attrs["transactions_applied = 150<br/>ledger.hash = DEF456..."]
+            acc_children["├── ledger.build<br/>└── ledger.validate"]
+        end
+
+        attrs --> open
+        open --> establish
+        establish --> accept
+    end
+
+    style round fill:#f57f17,stroke:#e65100,color:#ffffff
+    style open fill:#1565c0,stroke:#0d47a1,color:#ffffff
+    style establish fill:#2e7d32,stroke:#1b5e20,color:#ffffff
+    style accept fill:#c2185b,stroke:#880e4f,color:#ffffff
+```
+
+---
+
+## 1.5 RPC Request Flow
+
+RPC requests support W3C Trace Context headers for distributed tracing across services:
+
+```mermaid
+flowchart TB
+    subgraph request["rpc.request (root span)"]
+        http["HTTP Request<br/>POST /<br/>traceparent: 00-abc123...-def456...-01"]
+
+        attrs["Attributes:<br/>http.method = POST<br/>net.peer.ip = 192.168.1.100<br/>xrpl.rpc.command = submit"]
+
+        subgraph enqueue["jobqueue.enqueue"]
+            job_attr["xrpl.job.type = jtCLIENT_RPC"]
+        end
+
+        subgraph command["rpc.command.submit"]
+            cmd_attrs["xrpl.rpc.version = 2<br/>xrpl.rpc.role = user"]
+            cmd_children["├── tx.deserialize<br/>├── tx.validate_local<br/>└── tx.submit_to_network"]
+        end
+
+        response["Response: 200 OK<br/>Duration: 45ms"]
+
+        http --> attrs
+        attrs --> enqueue
+        enqueue --> command
+        command --> response
+    end
+
+    style request fill:#2e7d32,stroke:#1b5e20,color:#ffffff
+    style enqueue fill:#1565c0,stroke:#0d47a1,color:#ffffff
+    style command fill:#e65100,stroke:#bf360c,color:#ffffff
+```
+
+---
+
+## 1.6 Key Trace Points
+
+The following table identifies priority instrumentation points across the codebase:
+
+| Category        | Span Name              | File                 | Method                 | Priority |
+| --------------- | ---------------------- | -------------------- | ---------------------- | -------- |
+| **Transaction** | `tx.receive`           | `PeerImp.cpp`        | `handleTransaction()`  | High     |
+| **Transaction** | `tx.validate`          | `NetworkOPs.cpp`     | `processTransaction()` | High     |
+| **Transaction** | `tx.process`           | `NetworkOPs.cpp`     | `doTransactionSync()`  | High     |
+| **Transaction** | `tx.relay`             | `OverlayImpl.cpp`    | `relay()`              | Medium   |
+| **Consensus**   | `consensus.round`      | `RCLConsensus.cpp`   | `startRound()`         | High     |
+| **Consensus**   | `consensus.phase.*`    | `Consensus.h`        | `timerEntry()`         | High     |
+| **Consensus**   | `consensus.proposal.*` | `RCLConsensus.cpp`   | `peerProposal()`       | Medium   |
+| **RPC**         | `rpc.request`          | `ServerHandler.cpp`  | `onRequest()`          | High     |
+| **RPC**         | `rpc.command.*`        | `RPCHandler.cpp`     | `doCommand()`          | High     |
+| **Peer**        | `peer.connect`         | `OverlayImpl.cpp`    | `onHandoff()`          | Low      |
+| **Peer**        | `peer.message.*`       | `PeerImp.cpp`        | `onMessage()`          | Low      |
+| **Ledger**      | `ledger.acquire`       | `InboundLedgers.cpp` | `acquire()`            | Medium   |
+| **Ledger**      | `ledger.build`         | `RCLConsensus.cpp`   | `buildLCL()`           | High     |
+
+---
+
+## 1.7 Instrumentation Priority
+
+```mermaid
+quadrantChart
+    title Instrumentation Priority Matrix
+    x-axis Low Complexity --> High Complexity
+    y-axis Low Value --> High Value
+    quadrant-1 Implement First
+    quadrant-2 Plan Carefully
+    quadrant-3 Quick Wins
+    quadrant-4 Consider Later
+
+    RPC Tracing: [0.3, 0.85]
+    Transaction Tracing: [0.65, 0.92]
+    Consensus Tracing: [0.75, 0.87]
+    Peer Message Tracing: [0.4, 0.3]
+    Ledger Acquisition: [0.5, 0.6]
+    JobQueue Tracing: [0.35, 0.5]
+```
+
+---
+
+## 1.8 Observable Outcomes
+
+After implementing OpenTelemetry, operators and developers will gain visibility into the following:
+
+### 1.8.1 What You Will See: Traces
+
+| Trace Type                 | Description                                                                                 | Example Query in Grafana/Tempo                         |
+| -------------------------- | ------------------------------------------------------------------------------------------- | ------------------------------------------------------ |
+| **Transaction Lifecycle**  | Full journey from RPC submission through validation, relay, consensus, and ledger inclusion | `{service.name="rippled" && xrpl.tx.hash="ABC123..."}` |
+| **Cross-Node Propagation** | Transaction path across multiple rippled nodes with timing                                  | `{xrpl.tx.relay_count > 0}`                            |
+| **Consensus Rounds**       | Complete round with all phases (open, establish, accept)                                    | `{span.name=~"consensus.round.*"}`                     |
+| **RPC Request Processing** | Individual command execution with timing breakdown                                          | `{xrpl.rpc.command="account_info"}`                    |
+| **Ledger Acquisition**     | Peer-to-peer ledger data requests and responses                                             | `{span.name="ledger.acquire"}`                         |
+
+### 1.8.2 What You Will See: Metrics (Derived from Traces)
+
+| Metric                        | Description                            | Dashboard Panel             |
+| ----------------------------- | -------------------------------------- | --------------------------- |
+| **RPC Latency (p50/p95/p99)** | Response time distribution per command | Heatmap by command          |
+| **Transaction Throughput**    | Transactions processed per second      | Time series graph           |
+| **Consensus Round Duration**  | Time to complete consensus phases      | Histogram                   |
+| **Cross-Node Latency**        | Time for transaction to reach N nodes  | Line chart with percentiles |
+| **Error Rate**                | Failed transactions/RPC calls by type  | Stacked bar chart           |
+
+### 1.8.3 Concrete Dashboard Examples
+
+**Transaction Trace View (Jaeger/Tempo):**
+
+```
+┌────────────────────────────────────────────────────────────────────────────────┐
+│ Trace: abc123... (Transaction Submission)                    Duration: 847ms   │
+├────────────────────────────────────────────────────────────────────────────────┤
+│ ├── rpc.request [ServerHandler]                              ████░░░░░░  45ms  │
+│ │   └── rpc.command.submit [RPCHandler]                      ████░░░░░░  42ms  │
+│ │       └── tx.receive [NetworkOPs]                          ███░░░░░░░  35ms  │
+│ │           ├── tx.validate [TxQ]                            █░░░░░░░░░   8ms  │
+│ │           └── tx.relay [Overlay]                           ██░░░░░░░░  15ms  │
+│ │               ├── tx.receive [Node-B]                      █████░░░░░  52ms  │
+│ │               │   └── tx.relay [Node-B]                    ██░░░░░░░░  18ms  │
+│ │               └── tx.receive [Node-C]                      ██████░░░░  65ms  │
+│ └── consensus.round [RCLConsensus]                           ████████░░ 720ms  │
+│     ├── consensus.phase.open                                 ██░░░░░░░░ 180ms  │
+│     ├── consensus.phase.establish                            █████░░░░░ 480ms  │
+│     └── consensus.phase.accept                               █░░░░░░░░░  60ms  │
+└────────────────────────────────────────────────────────────────────────────────┘
+```
+
+**RPC Performance Dashboard Panel:**
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│ RPC Command Latency (Last 1 Hour)                           │
+├─────────────────────────────────────────────────────────────┤
+│ Command          │ p50    │ p95    │ p99    │ Errors │ Rate │
+│──────────────────┼────────┼────────┼────────┼────────┼──────│
+│ account_info     │  12ms  │  45ms  │  89ms  │  0.1%  │ 150/s│
+│ submit           │  35ms  │ 120ms  │ 250ms  │  2.3%  │  45/s│
+│ ledger           │   8ms  │  25ms  │  55ms  │  0.0%  │  80/s│
+│ tx               │  15ms  │  50ms  │ 100ms  │  0.5%  │  60/s│
+│ server_info      │   5ms  │  12ms  │  20ms  │  0.0%  │ 200/s│
+└─────────────────────────────────────────────────────────────┘
+```
+
+**Consensus Health Dashboard Panel:**
+
+```mermaid
+---
+config:
+    xyChart:
+        width: 1200
+        height: 400
+        plotReservedSpacePercent: 50
+        chartOrientation: vertical
+    themeVariables:
+        xyChart:
+            plotColorPalette: "#3498db"
+---
+xychart-beta
+    title "Consensus Round Duration (Last 24 Hours)"
+    x-axis "Time of Day (Hours)" [0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24]
+    y-axis "Duration (seconds)" 1 --> 5
+    line [2.1, 2.3, 2.5, 2.4, 2.8, 1.6, 3.2, 3.0, 3.5, 1.3, 3.8, 3.6, 4.0, 3.2, 4.3, 4.1, 4.5, 4.3, 4.2, 2.4, 4.8, 4.6, 4.9, 4.7, 5.0, 4.9, 4.8, 2.6, 4.7, 4.5, 4.2, 4.0, 2.5, 3.7, 3.2, 3.4, 2.9, 3.1, 2.6, 2.8, 2.3, 1.5, 2.7, 2.4, 2.5, 2.3, 2.2, 2.1, 2.0]
+```
+
+### 1.8.4 Operator Actionable Insights
+
+| Scenario              | What You'll See                                                              | Action                           |
+| --------------------- | ---------------------------------------------------------------------------- | -------------------------------- |
+| **Slow RPC**          | Span showing which phase is slow (parsing, execution, serialization)         | Optimize specific code path      |
+| **Transaction Stuck** | Trace stops at validation; error attribute shows reason                      | Fix transaction parameters       |
+| **Consensus Delay**   | Phase.establish taking too long; proposer attribute shows missing validators | Investigate network connectivity |
+| **Memory Spike**      | Large batch of spans correlating with memory increase                        | Tune batch_size or sampling      |
+| **Network Partition** | Traces missing cross-node links for specific peer                            | Check peer connectivity          |
+
+### 1.8.5 Developer Debugging Workflow
+
+1. **Find Transaction**: Query by `xrpl.tx.hash` to get full trace
+2. **Identify Bottleneck**: Look at span durations to find slowest component
+3. **Check Attributes**: Review `xrpl.tx.validity`, `xrpl.rpc.status` for errors
+4. **Correlate Logs**: Use `trace_id` to find related PerfLog entries
+5. **Compare Nodes**: Filter by `service.instance.id` to compare behavior across nodes
+
+---
+
+_Next: [Design Decisions](./02-design-decisions.md)_ | _Back to: [Overview](./OpenTelemetryPlan.md)_

OpenTelemetryPlan/02-design-decisions.md

@@ -0,0 +1,514 @@
+# Design Decisions
+
+> **Parent Document**: [OpenTelemetryPlan.md](./OpenTelemetryPlan.md)
+> **Related**: [Architecture Analysis](./01-architecture-analysis.md) | [Code Samples](./04-code-samples.md)
+
+---
+
+## 2.1 OpenTelemetry Components
+
+### 2.1.1 SDK Selection
+
+**Primary Choice**: OpenTelemetry C++ SDK (`opentelemetry-cpp`)
+
+| Component                               | Purpose                | Required    |
+| --------------------------------------- | ---------------------- | ----------- |
+| `opentelemetry-cpp::api`                | Tracing API headers    | Yes         |
+| `opentelemetry-cpp::sdk`                | SDK implementation     | Yes         |
+| `opentelemetry-cpp::ext`                | Extensions (exporters) | Yes         |
+| `opentelemetry-cpp::otlp_grpc_exporter` | OTLP/gRPC export       | Recommended |
+| `opentelemetry-cpp::otlp_http_exporter` | OTLP/HTTP export       | Alternative |
+
+### 2.1.2 Instrumentation Strategy
+
+**Manual Instrumentation** (recommended):
+
+| Approach   | Pros                                                              | Cons                                                    |
+| ---------- | ----------------------------------------------------------------- | ------------------------------------------------------- |
+| **Manual** | Precise control, optimized placement, rippled-specific attributes | More development effort                                 |
+| **Auto**   | Less code, automatic coverage                                     | Less control, potential overhead, limited customization |
+
+---
+
+## 2.2 Exporter Configuration
+
+```mermaid
+flowchart TB
+    subgraph nodes["rippled Nodes"]
+        node1["rippled<br/>Node 1"]
+        node2["rippled<br/>Node 2"]
+        node3["rippled<br/>Node 3"]
+    end
+
+    collector["OpenTelemetry<br/>Collector<br/>(sidecar or standalone)"]
+
+    subgraph backends["Observability Backends"]
+        jaeger["Jaeger<br/>(Dev)"]
+        tempo["Tempo<br/>(Prod)"]
+        elastic["Elastic<br/>APM"]
+    end
+
+    node1 -->|"OTLP/gRPC<br/>:4317"| collector
+    node2 -->|"OTLP/gRPC<br/>:4317"| collector
+    node3 -->|"OTLP/gRPC<br/>:4317"| collector
+
+    collector --> jaeger
+    collector --> tempo
+    collector --> elastic
+
+    style nodes fill:#0d47a1,stroke:#082f6a,color:#ffffff
+    style backends fill:#1b5e20,stroke:#0d3d14,color:#ffffff
+    style collector fill:#bf360c,stroke:#8c2809,color:#ffffff
+```
+
+### 2.2.1 OTLP/gRPC (Recommended)
+
+```cpp
+// Configuration for OTLP over gRPC
+namespace otlp = opentelemetry::exporter::otlp;
+
+otlp::OtlpGrpcExporterOptions opts;
+opts.endpoint = "localhost:4317";
+opts.use_ssl_credentials = true;
+opts.ssl_credentials_cacert_path = "/path/to/ca.crt";
+```
+
+### 2.2.2 OTLP/HTTP (Alternative)
+
+```cpp
+// Configuration for OTLP over HTTP
+namespace otlp = opentelemetry::exporter::otlp;
+
+otlp::OtlpHttpExporterOptions opts;
+opts.url = "http://localhost:4318/v1/traces";
+opts.content_type = otlp::HttpRequestContentType::kJson;  // or kBinary
+```
+
+---
+
+## 2.3 Span Naming Conventions
+
+### 2.3.1 Naming Schema
+
+```
+<component>.<operation>[.<sub-operation>]
+```
+
+**Examples**:
+
+- `tx.receive` - Transaction received from peer
+- `consensus.phase.establish` - Consensus establish phase
+- `rpc.command.server_info` - server_info RPC command
+
+### 2.3.2 Complete Span Catalog
+
+```yaml
+# Transaction Spans
+tx:
+  receive: "Transaction received from network"
+  validate: "Transaction signature/format validation"
+  process: "Full transaction processing"
+  relay: "Transaction relay to peers"
+  apply: "Apply transaction to ledger"
+
+# Consensus Spans
+consensus:
+  round: "Complete consensus round"
+  phase:
+    open: "Open phase - collecting transactions"
+    establish: "Establish phase - reaching agreement"
+    accept: "Accept phase - applying consensus"
+  proposal:
+    receive: "Receive peer proposal"
+    send: "Send our proposal"
+  validation:
+    receive: "Receive peer validation"
+    send: "Send our validation"
+
+# RPC Spans
+rpc:
+  request: "HTTP/WebSocket request handling"
+  command:
+    "*": "Specific RPC command (dynamic)"
+
+# Peer Spans
+peer:
+  connect: "Peer connection establishment"
+  disconnect: "Peer disconnection"
+  message:
+    send: "Send protocol message"
+    receive: "Receive protocol message"
+
+# Ledger Spans
+ledger:
+  acquire: "Ledger acquisition from network"
+  build: "Build new ledger"
+  validate: "Ledger validation"
+  close: "Close ledger"
+
+# Job Spans
+job:
+  enqueue: "Job added to queue"
+  execute: "Job execution"
+```
+
+---
+
+## 2.4 Attribute Schema
+
+### 2.4.1 Resource Attributes (Set Once at Startup)
+
+```cpp
+// Standard OpenTelemetry semantic conventions
+resource::SemanticConventions::SERVICE_NAME        = "rippled"
+resource::SemanticConventions::SERVICE_VERSION     = BuildInfo::getVersionString()
+resource::SemanticConventions::SERVICE_INSTANCE_ID = <node_public_key_base58>
+
+// Custom rippled attributes
+"xrpl.network.id"      = <network_id>           // e.g., 0 for mainnet
+"xrpl.network.type"    = "mainnet" | "testnet" | "devnet" | "standalone"
+"xrpl.node.type"       = "validator" | "stock" | "reporting"
+"xrpl.node.cluster"    = <cluster_name>         // If clustered
+```
+
+### 2.4.2 Span Attributes by Category
+
+#### Transaction Attributes
+
+```cpp
+"xrpl.tx.hash"         = string   // Transaction hash (hex)
+"xrpl.tx.type"         = string   // "Payment", "OfferCreate", etc.
+"xrpl.tx.account"      = string   // Source account (redacted in prod)
+"xrpl.tx.sequence"     = int64    // Account sequence number
+"xrpl.tx.fee"          = int64    // Fee in drops
+"xrpl.tx.result"       = string   // "tesSUCCESS", "tecPATH_DRY", etc.
+"xrpl.tx.ledger_index" = int64    // Ledger containing transaction
+```
+
+#### Consensus Attributes
+
+```cpp
+"xrpl.consensus.round"          = int64    // Round number
+"xrpl.consensus.phase"          = string   // "open", "establish", "accept"
+"xrpl.consensus.mode"           = string   // "proposing", "observing", etc.
+"xrpl.consensus.proposers"      = int64    // Number of proposers
+"xrpl.consensus.ledger.prev"    = string   // Previous ledger hash
+"xrpl.consensus.ledger.seq"     = int64    // Ledger sequence
+"xrpl.consensus.tx_count"       = int64    // Transactions in consensus set
+"xrpl.consensus.duration_ms"    = float64  // Round duration
+
+// Phase 4a: Establish-phase gap fill & cross-node correlation
+"xrpl.consensus.round_id"          = int64    // Consensus round number
+"xrpl.consensus.ledger_id"         = string   // previousLedger.id() — shared across nodes
+"xrpl.consensus.trace_strategy"    = string   // "deterministic" or "attribute"
+"xrpl.consensus.converge_percent"  = int64    // Convergence % (0-100+)
+"xrpl.consensus.establish_count"   = int64    // Number of establish iterations
+"xrpl.consensus.disputes_count"    = int64    // Active disputed transactions
+"xrpl.consensus.proposers_agreed"  = int64    // Peers agreeing with our position
+"xrpl.consensus.proposers_total"   = int64    // Total peer positions
+"xrpl.consensus.agree_count"       = int64    // Peers that agree (haveConsensus)
+"xrpl.consensus.disagree_count"    = int64    // Peers that disagree
+"xrpl.consensus.threshold_percent" = int64    // Current threshold (50/65/70/95)
+"xrpl.consensus.result"            = string   // "yes", "no", "moved_on"
+"xrpl.consensus.mode.old"          = string   // Previous consensus mode
+"xrpl.consensus.mode.new"          = string   // New consensus mode
+```
+
+#### RPC Attributes
+
+```cpp
+"xrpl.rpc.command"     = string   // Command name
+"xrpl.rpc.version"     = int64    // API version
+"xrpl.rpc.role"        = string   // "admin" or "user"
+"xrpl.rpc.params"      = string   // Sanitized parameters (optional)
+```
+
+#### Peer & Message Attributes
+
+```cpp
+"xrpl.peer.id"            = string   // Peer public key (base58)
+"xrpl.peer.address"       = string   // IP:port
+"xrpl.peer.latency_ms"    = float64  // Measured latency
+"xrpl.peer.cluster"       = string   // Cluster name if clustered
+"xrpl.message.type"       = string   // Protocol message type name
+"xrpl.message.size_bytes" = int64    // Message size
+"xrpl.message.compressed" = bool     // Whether compressed
+```
+
+#### Ledger & Job Attributes
+
+```cpp
+"xrpl.ledger.hash"       = string   // Ledger hash
+"xrpl.ledger.index"      = int64    // Ledger sequence/index
+"xrpl.ledger.close_time" = int64    // Close time (epoch)
+"xrpl.ledger.tx_count"   = int64    // Transaction count
+"xrpl.job.type"          = string   // Job type name
+"xrpl.job.queue_ms"      = float64  // Time spent in queue
+"xrpl.job.worker"        = int64    // Worker thread ID
+```
+
+### 2.4.3 Data Collection Summary
+
+The following table summarizes what data is collected by category:
+
+| Category        | Attributes Collected                                                 | Purpose                     |
+| --------------- | -------------------------------------------------------------------- | --------------------------- |
+| **Transaction** | `tx.hash`, `tx.type`, `tx.result`, `tx.fee`, `ledger_index`          | Trace transaction lifecycle |
+| **Consensus**   | `round`, `phase`, `mode`, `proposers` (public keys), `duration_ms`   | Analyze consensus timing    |
+| **RPC**         | `command`, `version`, `status`, `duration_ms`                        | Monitor RPC performance     |
+| **Peer**        | `peer.id` (public key), `latency_ms`, `message.type`, `message.size` | Network topology analysis   |
+| **Ledger**      | `ledger.hash`, `ledger.index`, `close_time`, `tx_count`              | Ledger progression tracking |
+| **Job**         | `job.type`, `queue_ms`, `worker`                                     | JobQueue performance        |
+
+### 2.4.4 Privacy & Sensitive Data Policy
+
+OpenTelemetry instrumentation is designed to collect **operational metadata only**, never sensitive content.
+
+#### Data NOT Collected
+
+The following data is explicitly **excluded** from telemetry collection:
+
+| Excluded Data           | Reason                                    |
+| ----------------------- | ----------------------------------------- |
+| **Private Keys**        | Never exposed; not relevant to tracing    |
+| **Account Balances**    | Financial data; privacy sensitive         |
+| **Transaction Amounts** | Financial data; privacy sensitive         |
+| **Raw TX Payloads**     | May contain sensitive memo/data fields    |
+| **Personal Data**       | No PII collected                          |
+| **IP Addresses**        | Configurable; excluded by default in prod |
+
+#### Privacy Protection Mechanisms
+
+| Mechanism                     | Description                                                               |
+| ----------------------------- | ------------------------------------------------------------------------- |
+| **Account Hashing**           | `xrpl.tx.account` is hashed at collector level before storage             |
+| **Configurable Redaction**    | Sensitive fields can be excluded via `[telemetry]` config section         |
+| **Sampling**                  | Only 10% of traces recorded by default, reducing data exposure            |
+| **Local Control**             | Node operators have full control over what gets exported                  |
+| **No Raw Payloads**           | Transaction content is never recorded, only metadata (hash, type, result) |
+| **Collector-Level Filtering** | Additional redaction/hashing can be configured at OTel Collector          |
+
+#### Collector-Level Data Protection
+
+The OpenTelemetry Collector can be configured to hash or redact sensitive attributes before export:
+
+```yaml
+processors:
+  attributes:
+    actions:
+      # Hash account addresses before storage
+      - key: xrpl.tx.account
+        action: hash
+      # Remove IP addresses entirely
+      - key: xrpl.peer.address
+        action: delete
+      # Redact specific fields
+      - key: xrpl.rpc.params
+        action: delete
+```
+
+#### Configuration Options for Privacy
+
+In `rippled.cfg`, operators can control data collection granularity:
+
+```ini
+[telemetry]
+enabled=1
+
+# Disable collection of specific components
+trace_transactions=1
+trace_consensus=1
+trace_rpc=1
+trace_peer=0          # Disable peer tracing (high volume, includes addresses)
+
+# Redact specific attributes
+redact_account=1      # Hash account addresses before export
+redact_peer_address=1 # Remove peer IP addresses
+```
+
+> **Key Principle**: Telemetry collects **operational metadata** (timing, counts, hashes) — never **sensitive content** (keys, balances, amounts, raw payloads).
+
+---
+
+## 2.5 Context Propagation Design
+
+### 2.5.1 Propagation Boundaries
+
+```mermaid
+flowchart TB
+    subgraph http["HTTP/WebSocket (RPC)"]
+        w3c["W3C Trace Context Headers:<br/>traceparent: 00-{trace_id}-{span_id}-{flags}<br/>tracestate: rippled=<state>"]
+    end
+
+    subgraph protobuf["Protocol Buffers (P2P)"]
+        proto["message TraceContext {<br/>  bytes trace_id = 1;  // 16 bytes<br/>  bytes span_id = 2;   // 8 bytes<br/>  uint32 trace_flags = 3;<br/>  string trace_state = 4;<br/>}"]
+    end
+
+    subgraph jobqueue["JobQueue (Internal Async)"]
+        job["Context captured at job creation,<br/>restored at execution<br/><br/>class Job {<br/>  opentelemetry::context::Context traceContext_;<br/>};"]
+    end
+
+    style http fill:#0d47a1,stroke:#082f6a,color:#ffffff
+    style protobuf fill:#1b5e20,stroke:#0d3d14,color:#ffffff
+    style jobqueue fill:#bf360c,stroke:#8c2809,color:#ffffff
+```
+
+---
+
+## 2.6 Integration with Existing Observability
+
+### 2.6.1 Existing Frameworks Comparison
+
+rippled already has two observability mechanisms. OpenTelemetry complements (not replaces) them:
+
+| Aspect                | PerfLog                       | Beast Insight (StatsD)       | OpenTelemetry             |
+| --------------------- | ----------------------------- | ---------------------------- | ------------------------- |
+| **Type**              | Logging                       | Metrics                      | Distributed Tracing       |
+| **Data**              | JSON log entries              | Counters, gauges, histograms | Spans with context        |
+| **Scope**             | Single node                   | Single node                  | **Cross-node**            |
+| **Output**            | `perf.log` file               | StatsD server                | OTLP Collector            |
+| **Question answered** | "What happened on this node?" | "How many? How fast?"        | "What was the journey?"   |
+| **Correlation**       | By timestamp                  | By metric name               | By `trace_id`             |
+| **Overhead**          | Low (file I/O)                | Low (UDP packets)            | Low-Medium (configurable) |
+
+### 2.6.2 What Each Framework Does Best
+
+#### PerfLog
+
+- **Purpose**: Detailed local event logging for RPC and job execution
+- **Strengths**:
+  - Rich JSON output with timing data
+  - Already integrated in RPC handlers
+  - File-based, no external dependencies
+- **Limitations**:
+  - Single-node only (no cross-node correlation)
+  - No parent-child relationships between events
+  - Manual log parsing required
+
+```json
+// Example PerfLog entry
+{
+  "time": "2024-01-15T10:30:00.123Z",
+  "method": "submit",
+  "duration_us": 1523,
+  "result": "tesSUCCESS"
+}
+```
+
+#### Beast Insight (StatsD)
+
+- **Purpose**: Real-time metrics for monitoring dashboards
+- **Strengths**:
+  - Aggregated metrics (counters, gauges, histograms)
+  - Low overhead (UDP, fire-and-forget)
+  - Good for alerting thresholds
+- **Limitations**:
+  - No request-level detail
+  - No causal relationships
+  - Single-node perspective
+
+```cpp
+// Example StatsD usage in rippled
+insight.increment("rpc.submit.count");
+insight.gauge("ledger.age", age);
+insight.timing("consensus.round", duration);
+```
+
+#### OpenTelemetry (NEW)
+
+- **Purpose**: Distributed request tracing across nodes
+- **Strengths**:
+  - **Cross-node correlation** via `trace_id`
+  - Parent-child span relationships
+  - Rich attributes per span
+  - Industry standard (CNCF)
+- **Limitations**:
+  - Requires collector infrastructure
+  - Higher complexity than logging
+
+```cpp
+// Example OpenTelemetry span
+auto span = telemetry.startSpan("tx.relay");
+span->SetAttribute("tx.hash", hash);
+span->SetAttribute("peer.id", peerId);
+// Span automatically linked to parent via context
+```
+
+### 2.6.3 When to Use Each
+
+| Scenario                                | PerfLog    | StatsD | OpenTelemetry |
+| --------------------------------------- | ---------- | ------ | ------------- |
+| "How many TXs per second?"              | ❌         | ✅     | ❌            |
+| "What's the p99 RPC latency?"           | ❌         | ✅     | ✅            |
+| "Why was this specific TX slow?"        | ⚠️ partial | ❌     | ✅            |
+| "Which node delayed consensus?"         | ❌         | ❌     | ✅            |
+| "What happened on node X at time T?"    | ✅         | ❌     | ✅            |
+| "Show me the TX journey across 5 nodes" | ❌         | ❌     | ✅            |
+
+### 2.6.4 Coexistence Strategy
+
+> **Note**: Phase 7 replaces the StatsD bridge with native OTel Metrics SDK export. The diagram below shows the Phase 6 intermediate state. See [Phase7_taskList.md](./Phase7_taskList.md) for the migration design where Beast Insight emits via OTLP instead of StatsD.
+
+```mermaid
+flowchart TB
+    subgraph rippled["rippled Process"]
+        perflog["PerfLog<br/>(JSON to file)"]
+        insight["Beast Insight<br/>(StatsD)"]
+        otel["OpenTelemetry<br/>(Tracing)"]
+    end
+
+    perflog --> perffile["perf.log"]
+    insight --> statsd["StatsD Server"]
+    otel --> collector["OTLP Collector"]
+
+    perffile --> grafana["Grafana<br/>(Unified UI)"]
+    statsd --> grafana
+    collector --> grafana
+
+    style rippled fill:#212121,stroke:#0a0a0a,color:#ffffff
+    style grafana fill:#bf360c,stroke:#8c2809,color:#ffffff
+```
+
+**Phase 7 target state**: Beast Insight routes to `OTelCollector` (new `Collector` implementation) which exports via OTLP/HTTP to the same collector endpoint as traces. StatsD UDP path becomes a deprecated fallback (`[insight] server=statsd`). See [06-implementation-phases.md §6.8](./06-implementation-phases.md) and [Phase7_taskList.md](./Phase7_taskList.md) for details.
+
+### 2.6.5 Correlation with PerfLog
+
+Trace IDs can be correlated with existing PerfLog entries for comprehensive debugging:
+
+```cpp
+// In RPCHandler.cpp - correlate trace with PerfLog
+Status doCommand(RPC::JsonContext& context, Json::Value& result)
+{
+    // Start OpenTelemetry span
+    auto span = context.app.getTelemetry().startSpan(
+        "rpc.command." + context.method);
+
+    // Get trace ID for correlation
+    auto traceId = span->GetContext().trace_id().IsValid()
+        ? toHex(span->GetContext().trace_id())
+        : "";
+
+    // Use existing PerfLog with trace correlation
+    auto const curId = context.app.getPerfLog().currentId();
+    context.app.getPerfLog().rpcStart(context.method, curId);
+
+    // Future: Add trace ID to PerfLog entry
+    // context.app.getPerfLog().setTraceId(curId, traceId);
+
+    try {
+        auto ret = handler(context, result);
+        context.app.getPerfLog().rpcFinish(context.method, curId);
+        span->SetStatus(opentelemetry::trace::StatusCode::kOk);
+        return ret;
+    } catch (std::exception const& e) {
+        context.app.getPerfLog().rpcError(context.method, curId);
+        span->RecordException(e);
+        span->SetStatus(opentelemetry::trace::StatusCode::kError, e.what());
+        throw;
+    }
+}
+```
+
+---
+
+_Previous: [Architecture Analysis](./01-architecture-analysis.md)_ | _Next: [Implementation Strategy](./03-implementation-strategy.md)_ | _Back to: [Overview](./OpenTelemetryPlan.md)_

OpenTelemetryPlan/03-implementation-strategy.md

@@ -0,0 +1,451 @@
+# Implementation Strategy
+
+> **Parent Document**: [OpenTelemetryPlan.md](./OpenTelemetryPlan.md)
+> **Related**: [Code Samples](./04-code-samples.md) | [Configuration Reference](./05-configuration-reference.md)
+
+---
+
+## 3.1 Directory Structure
+
+The telemetry implementation follows rippled's existing code organization pattern:
+
+```
+include/xrpl/
+├── telemetry/
+│   ├── Telemetry.h              # Main telemetry interface
+│   ├── TelemetryConfig.h        # Configuration structures
+│   ├── TraceContext.h           # Context propagation utilities
+│   ├── SpanGuard.h              # RAII span management
+│   └── SpanAttributes.h         # Attribute helper functions
+
+src/libxrpl/
+├── telemetry/
+│   ├── Telemetry.cpp            # Implementation
+│   ├── TelemetryConfig.cpp      # Config parsing
+│   ├── TraceContext.cpp         # Context serialization
+│   └── NullTelemetry.cpp        # No-op implementation
+
+src/xrpld/
+├── telemetry/
+│   ├── TracingInstrumentation.h # Instrumentation macros
+│   └── TracingInstrumentation.cpp
+```
+
+---
+
+## 3.2 Implementation Approach
+
+<div align="center">
+
+```mermaid
+%%{init: {'flowchart': {'nodeSpacing': 20, 'rankSpacing': 30}}}%%
+flowchart TB
+    subgraph phase1["Phase 1: Core"]
+        direction LR
+        sdk["SDK Integration"] ~~~ interface["Telemetry Interface"] ~~~ config["Configuration"]
+    end
+
+    subgraph phase2["Phase 2: RPC"]
+        direction LR
+        http["HTTP Context"] ~~~ rpc["RPC Handlers"]
+    end
+
+    subgraph phase3["Phase 3: P2P"]
+        direction LR
+        proto["Protobuf Context"] ~~~ tx["Transaction Relay"]
+    end
+
+    subgraph phase4["Phase 4: Consensus"]
+        direction LR
+        consensus["Consensus Rounds"] ~~~ proposals["Proposals"]
+    end
+
+    phase1 --> phase2 --> phase3 --> phase4
+
+    style phase1 fill:#1565c0,stroke:#0d47a1,color:#ffffff
+    style phase2 fill:#2e7d32,stroke:#1b5e20,color:#ffffff
+    style phase3 fill:#e65100,stroke:#bf360c,color:#ffffff
+    style phase4 fill:#c2185b,stroke:#880e4f,color:#ffffff
+```
+
+</div>
+
+### Key Principles
+
+1. **Minimal Intrusion**: Instrumentation should not alter existing control flow
+2. **Zero-Cost When Disabled**: Use compile-time flags and no-op implementations
+3. **Backward Compatibility**: Protocol Buffer extensions use high field numbers
+4. **Graceful Degradation**: Tracing failures must not affect node operation
+
+---
+
+## 3.3 Performance Overhead Summary
+
+| Metric        | Overhead   | Notes                               |
+| ------------- | ---------- | ----------------------------------- |
+| CPU           | 1-3%       | Span creation and attribute setting |
+| Memory        | 2-5 MB     | Batch buffer for pending spans      |
+| Network       | 10-50 KB/s | Compressed OTLP export to collector |
+| Latency (p99) | <2%        | With proper sampling configuration  |
+
+---
+
+## 3.4 Detailed CPU Overhead Analysis
+
+### 3.4.1 Per-Operation Costs
+
+| Operation             | Time (ns) | Frequency              | Impact     |
+| --------------------- | --------- | ---------------------- | ---------- |
+| Span creation         | 200-500   | Every traced operation | Low        |
+| Span end              | 100-200   | Every traced operation | Low        |
+| SetAttribute (string) | 80-120    | 3-5 per span           | Low        |
+| SetAttribute (int)    | 40-60     | 2-3 per span           | Negligible |
+| AddEvent              | 50-80     | 0-2 per span           | Negligible |
+| Context injection     | 150-250   | Per outgoing message   | Low        |
+| Context extraction    | 100-180   | Per incoming message   | Low        |
+| GetCurrent context    | 10-20     | Thread-local access    | Negligible |
+
+### 3.4.2 Transaction Processing Overhead
+
+<div align="center">
+
+```mermaid
+%%{init: {'pie': {'textPosition': 0.75}}}%%
+pie showData
+    "tx.receive (800ns)" : 800
+    "tx.validate (500ns)" : 500
+    "tx.relay (500ns)" : 500
+    "Context inject (600ns)" : 600
+```
+
+**Transaction Tracing Overhead (~2.4μs total)**
+
+</div>
+
+**Overhead percentage**: 2.4 μs / 200 μs (avg tx processing) = **~1.2%**
+
+### 3.4.3 Consensus Round Overhead
+
+| Operation              | Count | Cost (ns) | Total      |
+| ---------------------- | ----- | --------- | ---------- |
+| consensus.round span   | 1     | ~1000     | ~1 μs      |
+| consensus.phase spans  | 3     | ~700      | ~2.1 μs    |
+| proposal.receive spans | ~20   | ~600      | ~12 μs     |
+| proposal.send spans    | ~3    | ~600      | ~1.8 μs    |
+| Context operations     | ~30   | ~200      | ~6 μs      |
+| **TOTAL**              |       |           | **~23 μs** |
+
+**Overhead percentage**: 23 μs / 3s (typical round) = **~0.0008%** (negligible)
+
+### 3.4.4 RPC Request Overhead
+
+| Operation        | Cost (ns)    |
+| ---------------- | ------------ |
+| rpc.request span | ~700         |
+| rpc.command span | ~600         |
+| Context extract  | ~250         |
+| Context inject   | ~200         |
+| **TOTAL**        | **~1.75 μs** |
+
+- Fast RPC (1ms): 1.75 μs / 1ms = **~0.175%**
+- Slow RPC (100ms): 1.75 μs / 100ms = **~0.002%**
+
+---
+
+## 3.5 Memory Overhead Analysis
+
+### 3.5.1 Static Memory
+
+| Component                | Size        | Allocated  |
+| ------------------------ | ----------- | ---------- |
+| TracerProvider singleton | ~64 KB      | At startup |
+| BatchSpanProcessor       | ~128 KB     | At startup |
+| OTLP exporter            | ~256 KB     | At startup |
+| Propagator registry      | ~8 KB       | At startup |
+| **Total static**         | **~456 KB** |            |
+
+### 3.5.2 Dynamic Memory
+
+| Component            | Size per unit | Max units  | Peak        |
+| -------------------- | ------------- | ---------- | ----------- |
+| Active span          | ~200 bytes    | 1000       | ~200 KB     |
+| Queued span (export) | ~500 bytes    | 2048       | ~1 MB       |
+| Attribute storage    | ~50 bytes     | 5 per span | Included    |
+| Context storage      | ~64 bytes     | Per thread | ~6.4 KB     |
+| **Total dynamic**    |               |            | **~1.2 MB** |
+
+### 3.5.3 Memory Growth Characteristics
+
+```mermaid
+---
+config:
+    xyChart:
+        width: 700
+        height: 400
+---
+xychart-beta
+    title "Memory Usage vs Span Rate"
+    x-axis "Spans/second" [0, 200, 400, 600, 800, 1000]
+    y-axis "Memory (MB)" 0 --> 6
+    line [1, 1.8, 2.6, 3.4, 4.2, 5]
+```
+
+**Notes**:
+
+- Memory increases linearly with span rate
+- Batch export prevents unbounded growth
+- Queue size is configurable (default 2048 spans)
+- At queue limit, oldest spans are dropped (not blocked)
+
+---
+
+## 3.6 Network Overhead Analysis
+
+### 3.6.1 Export Bandwidth
+
+| Sampling Rate | Spans/sec | Bandwidth | Notes            |
+| ------------- | --------- | --------- | ---------------- |
+| 100%          | ~500      | ~250 KB/s | Development only |
+| 10%           | ~50       | ~25 KB/s  | Staging          |
+| 1%            | ~5        | ~2.5 KB/s | Production       |
+| Error-only    | ~1        | ~0.5 KB/s | Minimal overhead |
+
+### 3.6.2 Trace Context Propagation
+
+| Message Type           | Context Size | Messages/sec | Overhead    |
+| ---------------------- | ------------ | ------------ | ----------- |
+| TMTransaction          | 32 bytes     | ~100         | ~3.2 KB/s   |
+| TMProposeSet           | 32 bytes     | ~10          | ~320 B/s    |
+| TMValidation           | 32 bytes     | ~50          | ~1.6 KB/s   |
+| **Total P2P overhead** |              |              | **~5 KB/s** |
+
+---
+
+## 3.7 Optimization Strategies
+
+### 3.7.1 Sampling Strategies
+
+```mermaid
+flowchart TD
+    trace["New Trace"]
+
+    trace --> errors{"Is Error?"}
+    errors -->|Yes| sample["SAMPLE"]
+    errors -->|No| consensus{"Is Consensus?"}
+
+    consensus -->|Yes| sample
+    consensus -->|No| slow{"Is Slow?"}
+
+    slow -->|Yes| sample
+    slow -->|No| prob{"Random < 10%?"}
+
+    prob -->|Yes| sample
+    prob -->|No| drop["DROP"]
+
+    style sample fill:#4caf50,stroke:#388e3c,color:#fff
+    style drop fill:#f44336,stroke:#c62828,color:#fff
+```
+
+### 3.7.2 Batch Tuning Recommendations
+
+| Environment        | Batch Size | Batch Delay | Max Queue |
+| ------------------ | ---------- | ----------- | --------- |
+| Low-latency        | 128        | 1000ms      | 512       |
+| High-throughput    | 1024       | 10000ms     | 8192      |
+| Memory-constrained | 256        | 2000ms      | 512       |
+
+### 3.7.3 Conditional Instrumentation
+
+```cpp
+// Compile-time feature flag
+#ifndef XRPL_ENABLE_TELEMETRY
+// Zero-cost when disabled
+#define XRPL_TRACE_SPAN(t, n) ((void)0)
+#endif
+
+// Runtime component filtering
+if (telemetry.shouldTracePeer())
+{
+    XRPL_TRACE_SPAN(telemetry, "peer.message.receive");
+    // ... instrumentation
+}
+// No overhead when component tracing disabled
+```
+
+---
+
+## 3.8 Links to Detailed Documentation
+
+- **[Code Samples](./04-code-samples.md)**: Complete implementation code for all components
+- **[Configuration Reference](./05-configuration-reference.md)**: Configuration options and collector setup
+- **[Implementation Phases](./06-implementation-phases.md)**: Detailed timeline and milestones
+
+---
+
+## 3.9 Code Intrusiveness Assessment
+
+This section provides a detailed assessment of how intrusive the OpenTelemetry integration is to the existing rippled codebase.
+
+### 3.9.1 Files Modified Summary
+
+| Component             | Files Modified | Lines Added | Lines Changed | Architectural Impact |
+| --------------------- | -------------- | ----------- | ------------- | -------------------- |
+| **Core Telemetry**    | 5 new files    | ~800        | 0             | None (new module)    |
+| **Application Init**  | 2 files        | ~30         | ~5            | Minimal              |
+| **RPC Layer**         | 3 files        | ~80         | ~20           | Minimal              |
+| **Transaction Relay** | 4 files        | ~120        | ~40           | Low                  |
+| **Consensus**         | 3 files        | ~100        | ~30           | Low-Medium           |
+| **Protocol Buffers**  | 1 file         | ~25         | 0             | Low                  |
+| **CMake/Build**       | 3 files        | ~50         | ~10           | Minimal              |
+| **Total**             | **~21 files**  | **~1,205**  | **~105**      | **Low**              |
+
+### 3.9.2 Detailed File Impact
+
+```mermaid
+pie title Code Changes by Component
+    "New Telemetry Module" : 800
+    "Transaction Relay" : 160
+    "Consensus" : 130
+    "RPC Layer" : 100
+    "Application Init" : 35
+    "Protocol Buffers" : 25
+    "Build System" : 60
+```
+
+#### New Files (No Impact on Existing Code)
+
+| File                                           | Lines | Purpose              |
+| ---------------------------------------------- | ----- | -------------------- |
+| `include/xrpl/telemetry/Telemetry.h`           | ~160  | Main interface       |
+| `include/xrpl/telemetry/SpanGuard.h`           | ~120  | RAII wrapper         |
+| `include/xrpl/telemetry/TraceContext.h`        | ~80   | Context propagation  |
+| `src/xrpld/telemetry/TracingInstrumentation.h` | ~60   | Macros               |
+| `src/libxrpl/telemetry/Telemetry.cpp`          | ~200  | Implementation       |
+| `src/libxrpl/telemetry/TelemetryConfig.cpp`    | ~60   | Config parsing       |
+| `src/libxrpl/telemetry/NullTelemetry.cpp`      | ~40   | No-op implementation |
+
+#### Modified Files (Existing Rippled Code)
+
+| File                                              | Lines Added | Lines Changed | Risk Level |
+| ------------------------------------------------- | ----------- | ------------- | ---------- |
+| `src/xrpld/app/main/Application.cpp`              | ~15         | ~3            | Low        |
+| `include/xrpl/app/main/Application.h`             | ~5          | ~2            | Low        |
+| `src/xrpld/rpc/detail/ServerHandler.cpp`          | ~40         | ~10           | Low        |
+| `src/xrpld/rpc/handlers/*.cpp`                    | ~30         | ~8            | Low        |
+| `src/xrpld/overlay/detail/PeerImp.cpp`            | ~60         | ~15           | Medium     |
+| `src/xrpld/overlay/detail/OverlayImpl.cpp`        | ~30         | ~10           | Medium     |
+| `src/xrpld/app/consensus/RCLConsensus.cpp`        | ~50         | ~15           | Medium     |
+| `src/xrpld/app/consensus/RCLConsensusAdaptor.cpp` | ~40         | ~12           | Medium     |
+| `src/xrpld/core/JobQueue.cpp`                     | ~20         | ~5            | Low        |
+| `src/xrpld/overlay/detail/ripple.proto`           | ~25         | 0             | Low        |
+| `CMakeLists.txt`                                  | ~40         | ~8            | Low        |
+| `cmake/FindOpenTelemetry.cmake`                   | ~50         | 0             | None (new) |
+
+### 3.9.3 Risk Assessment by Component
+
+<div align="center">
+
+**Do First** ↖ ↗ **Plan Carefully**
+
+```mermaid
+quadrantChart
+    title Code Intrusiveness Risk Matrix
+    x-axis Low Risk --> High Risk
+    y-axis Low Value --> High Value
+
+    RPC Tracing: [0.2, 0.8]
+    Transaction Relay: [0.5, 0.9]
+    Consensus Tracing: [0.7, 0.95]
+    Peer Message Tracing: [0.8, 0.4]
+    JobQueue Context: [0.4, 0.5]
+    Ledger Acquisition: [0.5, 0.6]
+```
+
+**Optional** ↙ ↘ **Avoid**
+
+</div>
+
+#### Risk Level Definitions
+
+| Risk Level | Definition                                                       | Mitigation                         |
+| ---------- | ---------------------------------------------------------------- | ---------------------------------- |
+| **Low**    | Additive changes only; no modification to existing logic         | Standard code review               |
+| **Medium** | Minor modifications to existing functions; clear boundaries      | Comprehensive unit tests           |
+| **High**   | Changes to core logic or data structures; potential side effects | Integration tests + staged rollout |
+
+### 3.9.4 Architectural Impact Assessment
+
+| Aspect               | Impact  | Justification                                                         |
+| -------------------- | ------- | --------------------------------------------------------------------- |
+| **Data Flow**        | None    | Tracing is purely observational; no business logic changes            |
+| **Threading Model**  | Minimal | Context propagation uses thread-local storage (standard OTel pattern) |
+| **Memory Model**     | Low     | Bounded queues prevent unbounded growth; RAII ensures cleanup         |
+| **Network Protocol** | Low     | Optional fields in protobuf (high field numbers); backward compatible |
+| **Configuration**    | None    | New config section; existing configs unaffected                       |
+| **Build System**     | Low     | Optional CMake flag; builds work without OpenTelemetry                |
+| **Dependencies**     | Low     | OpenTelemetry SDK is optional; null implementation when disabled      |
+
+### 3.9.5 Backward Compatibility
+
+| Compatibility   | Status  | Notes                                                 |
+| --------------- | ------- | ----------------------------------------------------- |
+| **Config File** | ✅ Full | New `[telemetry]` section is optional                 |
+| **Protocol**    | ✅ Full | Optional protobuf fields with high field numbers      |
+| **Build**       | ✅ Full | `XRPL_ENABLE_TELEMETRY=OFF` produces identical binary |
+| **Runtime**     | ✅ Full | `enabled=0` produces zero overhead                    |
+| **API**         | ✅ Full | No changes to public RPC or P2P APIs                  |
+
+### 3.9.6 Rollback Strategy
+
+If issues are discovered after deployment:
+
+1. **Immediate**: Set `enabled=0` in config and restart (zero code change)
+2. **Quick**: Rebuild with `XRPL_ENABLE_TELEMETRY=OFF`
+3. **Complete**: Revert telemetry commits (clean separation makes this easy)
+
+### 3.9.7 Code Change Examples
+
+**Minimal RPC Instrumentation (Low Intrusiveness):**
+
+```cpp
+// Before
+void ServerHandler::onRequest(...) {
+    auto result = processRequest(req);
+    send(result);
+}
+
+// After (only ~10 lines added)
+void ServerHandler::onRequest(...) {
+    XRPL_TRACE_RPC(app_.getTelemetry(), "rpc.request");  // +1 line
+    XRPL_TRACE_SET_ATTR("xrpl.rpc.command", command);     // +1 line
+
+    auto result = processRequest(req);
+
+    XRPL_TRACE_SET_ATTR("xrpl.rpc.status", status);       // +1 line
+    send(result);
+}
+```
+
+**Consensus Instrumentation (Medium Intrusiveness):**
+
+```cpp
+// Before
+void RCLConsensusAdaptor::startRound(...) {
+    // ... existing logic
+}
+
+// After (context storage required)
+void RCLConsensusAdaptor::startRound(...) {
+    XRPL_TRACE_CONSENSUS(app_.getTelemetry(), "consensus.round");
+    XRPL_TRACE_SET_ATTR("xrpl.consensus.ledger.seq", seq);
+
+    // Store context for child spans in phase transitions
+    currentRoundContext_ = _xrpl_guard_->context();  // New member variable
+
+    // ... existing logic unchanged
+}
+```
+
+---
+
+_Previous: [Design Decisions](./02-design-decisions.md)_ | _Next: [Code Samples](./04-code-samples.md)_ | _Back to: [Overview](./OpenTelemetryPlan.md)_

OpenTelemetryPlan/04-code-samples.md

@@ -0,0 +1,982 @@
+# Code Samples
+
+> **Parent Document**: [OpenTelemetryPlan.md](./OpenTelemetryPlan.md)
+> **Related**: [Implementation Strategy](./03-implementation-strategy.md) | [Configuration Reference](./05-configuration-reference.md)
+
+---
+
+## 4.1 Core Interfaces
+
+### 4.1.1 Main Telemetry Interface
+
+```cpp
+// include/xrpl/telemetry/Telemetry.h
+#pragma once
+
+#include <xrpl/telemetry/TelemetryConfig.h>
+#include <opentelemetry/trace/tracer.h>
+#include <opentelemetry/trace/span.h>
+#include <opentelemetry/context/context.h>
+
+#include <memory>
+#include <string>
+#include <string_view>
+
+namespace xrpl {
+namespace telemetry {
+
+/**
+ * Main telemetry interface for OpenTelemetry integration.
+ *
+ * This class provides the primary API for distributed tracing in rippled.
+ * It manages the OpenTelemetry SDK lifecycle and provides convenience
+ * methods for creating spans and propagating context.
+ */
+class Telemetry
+{
+public:
+    /**
+     * Configuration for the telemetry system.
+     */
+    struct Setup
+    {
+        bool enabled = false;
+        std::string serviceName = "rippled";
+        std::string serviceVersion;
+        std::string serviceInstanceId;  // Node public key
+
+        // Exporter configuration
+        std::string exporterType = "otlp_grpc";  // "otlp_grpc", "otlp_http", "none"
+        std::string exporterEndpoint = "localhost:4317";
+        bool useTls = false;
+        std::string tlsCertPath;
+
+        // Sampling configuration
+        double samplingRatio = 1.0;  // 1.0 = 100% sampling
+
+        // Batch processor settings
+        std::uint32_t batchSize = 512;
+        std::chrono::milliseconds batchDelay{5000};
+        std::uint32_t maxQueueSize = 2048;
+
+        // Network attributes
+        std::uint32_t networkId = 0;
+        std::string networkType = "mainnet";
+
+        // Component filtering
+        bool traceTransactions = true;
+        bool traceConsensus = true;
+        bool traceRpc = true;
+        bool tracePeer = false;  // High volume, disabled by default
+        bool traceLedger = true;
+    };
+
+    virtual ~Telemetry() = default;
+
+    // ═══════════════════════════════════════════════════════════════════════
+    // LIFECYCLE
+    // ═══════════════════════════════════════════════════════════════════════
+
+    /** Start the telemetry system (call after configuration) */
+    virtual void start() = 0;
+
+    /** Stop the telemetry system (flushes pending spans) */
+    virtual void stop() = 0;
+
+    /** Check if telemetry is enabled */
+    virtual bool isEnabled() const = 0;
+
+    // ═══════════════════════════════════════════════════════════════════════
+    // TRACER ACCESS
+    // ═══════════════════════════════════════════════════════════════════════
+
+    /** Get the tracer for creating spans */
+    virtual opentelemetry::nostd::shared_ptr<opentelemetry::trace::Tracer>
+    getTracer(std::string_view name = "rippled") = 0;
+
+    // ═══════════════════════════════════════════════════════════════════════
+    // SPAN CREATION (Convenience Methods)
+    // ═══════════════════════════════════════════════════════════════════════
+
+    /** Start a new span with default options */
+    virtual opentelemetry::nostd::shared_ptr<opentelemetry::trace::Span>
+    startSpan(
+        std::string_view name,
+        opentelemetry::trace::SpanKind kind =
+            opentelemetry::trace::SpanKind::kInternal) = 0;
+
+    /** Start a span as child of given context */
+    virtual opentelemetry::nostd::shared_ptr<opentelemetry::trace::Span>
+    startSpan(
+        std::string_view name,
+        opentelemetry::context::Context const& parentContext,
+        opentelemetry::trace::SpanKind kind =
+            opentelemetry::trace::SpanKind::kInternal) = 0;
+
+    // ═══════════════════════════════════════════════════════════════════════
+    // CONTEXT PROPAGATION
+    // ═══════════════════════════════════════════════════════════════════════
+
+    /** Serialize context for network transmission */
+    virtual std::string serializeContext(
+        opentelemetry::context::Context const& ctx) = 0;
+
+    /** Deserialize context from network data */
+    virtual opentelemetry::context::Context deserializeContext(
+        std::string const& serialized) = 0;
+
+    // ═══════════════════════════════════════════════════════════════════════
+    // COMPONENT FILTERING
+    // ═══════════════════════════════════════════════════════════════════════
+
+    /** Check if transaction tracing is enabled */
+    virtual bool shouldTraceTransactions() const = 0;
+
+    /** Check if consensus tracing is enabled */
+    virtual bool shouldTraceConsensus() const = 0;
+
+    /** Check if RPC tracing is enabled */
+    virtual bool shouldTraceRpc() const = 0;
+
+    /** Check if peer message tracing is enabled */
+    virtual bool shouldTracePeer() const = 0;
+};
+
+// Factory functions
+std::unique_ptr<Telemetry>
+make_Telemetry(
+    Telemetry::Setup const& setup,
+    beast::Journal journal);
+
+Telemetry::Setup
+setup_Telemetry(
+    Section const& section,
+    std::string const& nodePublicKey,
+    std::string const& version);
+
+} // namespace telemetry
+} // namespace xrpl
+```
+
+---
+
+## 4.2 RAII Span Guard
+
+```cpp
+// include/xrpl/telemetry/SpanGuard.h
+#pragma once
+
+#include <opentelemetry/trace/span.h>
+#include <opentelemetry/trace/scope.h>
+#include <opentelemetry/trace/status.h>
+
+#include <string_view>
+#include <exception>
+
+namespace xrpl {
+namespace telemetry {
+
+/**
+ * RAII guard for OpenTelemetry spans.
+ *
+ * Automatically ends the span on destruction and makes it the current
+ * span in the thread-local context.
+ */
+class SpanGuard
+{
+    opentelemetry::nostd::shared_ptr<opentelemetry::trace::Span> span_;
+    opentelemetry::trace::Scope scope_;
+
+public:
+    /**
+     * Construct guard with span.
+     * The span becomes the current span in thread-local context.
+     */
+    explicit SpanGuard(
+        opentelemetry::nostd::shared_ptr<opentelemetry::trace::Span> span)
+        : span_(std::move(span))
+        , scope_(span_)
+    {
+    }
+
+    // Non-copyable, non-movable
+    SpanGuard(SpanGuard const&) = delete;
+    SpanGuard& operator=(SpanGuard const&) = delete;
+    SpanGuard(SpanGuard&&) = delete;
+    SpanGuard& operator=(SpanGuard&&) = delete;
+
+    ~SpanGuard()
+    {
+        if (span_)
+            span_->End();
+    }
+
+    /** Access the underlying span */
+    opentelemetry::trace::Span& span() { return *span_; }
+    opentelemetry::trace::Span const& span() const { return *span_; }
+
+    /** Set span status to OK */
+    void setOk()
+    {
+        span_->SetStatus(opentelemetry::trace::StatusCode::kOk);
+    }
+
+    /** Set span status with code and description */
+    void setStatus(
+        opentelemetry::trace::StatusCode code,
+        std::string_view description = "")
+    {
+        span_->SetStatus(code, std::string(description));
+    }
+
+    /** Set an attribute on the span */
+    template<typename T>
+    void setAttribute(std::string_view key, T&& value)
+    {
+        span_->SetAttribute(
+            opentelemetry::nostd::string_view(key.data(), key.size()),
+            std::forward<T>(value));
+    }
+
+    /** Add an event to the span */
+    void addEvent(std::string_view name)
+    {
+        span_->AddEvent(std::string(name));
+    }
+
+    /** Record an exception on the span */
+    void recordException(std::exception const& e)
+    {
+        span_->RecordException(e);
+        span_->SetStatus(
+            opentelemetry::trace::StatusCode::kError,
+            e.what());
+    }
+
+    /** Get the current trace context */
+    opentelemetry::context::Context context() const
+    {
+        return opentelemetry::context::RuntimeContext::GetCurrent();
+    }
+};
+
+/**
+ * No-op span guard for when tracing is disabled.
+ * Provides the same interface but does nothing.
+ */
+class NullSpanGuard
+{
+public:
+    NullSpanGuard() = default;
+
+    void setOk() {}
+    void setStatus(opentelemetry::trace::StatusCode, std::string_view = "") {}
+
+    template<typename T>
+    void setAttribute(std::string_view, T&&) {}
+
+    void addEvent(std::string_view) {}
+    void recordException(std::exception const&) {}
+};
+
+} // namespace telemetry
+} // namespace xrpl
+```
+
+---
+
+## 4.3 Instrumentation Macros
+
+```cpp
+// src/xrpld/telemetry/TracingInstrumentation.h
+#pragma once
+
+#include <xrpl/telemetry/Telemetry.h>
+#include <xrpl/telemetry/SpanGuard.h>
+
+namespace xrpl {
+namespace telemetry {
+
+// ═══════════════════════════════════════════════════════════════════════════
+// INSTRUMENTATION MACROS
+// ═══════════════════════════════════════════════════════════════════════════
+
+#ifdef XRPL_ENABLE_TELEMETRY
+
+// Start a span that is automatically ended when guard goes out of scope
+#define XRPL_TRACE_SPAN(telemetry, name) \
+    auto _xrpl_span_ = (telemetry).startSpan(name); \
+    ::xrpl::telemetry::SpanGuard _xrpl_guard_(_xrpl_span_)
+
+// Start a span with specific kind
+#define XRPL_TRACE_SPAN_KIND(telemetry, name, kind) \
+    auto _xrpl_span_ = (telemetry).startSpan(name, kind); \
+    ::xrpl::telemetry::SpanGuard _xrpl_guard_(_xrpl_span_)
+
+// Conditional span based on component
+#define XRPL_TRACE_TX(telemetry, name) \
+    std::optional<::xrpl::telemetry::SpanGuard> _xrpl_guard_; \
+    if ((telemetry).shouldTraceTransactions()) { \
+        _xrpl_guard_.emplace((telemetry).startSpan(name)); \
+    }
+
+#define XRPL_TRACE_CONSENSUS(telemetry, name) \
+    std::optional<::xrpl::telemetry::SpanGuard> _xrpl_guard_; \
+    if ((telemetry).shouldTraceConsensus()) { \
+        _xrpl_guard_.emplace((telemetry).startSpan(name)); \
+    }
+
+#define XRPL_TRACE_RPC(telemetry, name) \
+    std::optional<::xrpl::telemetry::SpanGuard> _xrpl_guard_; \
+    if ((telemetry).shouldTraceRpc()) { \
+        _xrpl_guard_.emplace((telemetry).startSpan(name)); \
+    }
+
+// Set attribute on current span (if exists)
+#define XRPL_TRACE_SET_ATTR(key, value) \
+    if (_xrpl_guard_.has_value()) { \
+        _xrpl_guard_->setAttribute(key, value); \
+    }
+
+// Record exception on current span
+#define XRPL_TRACE_EXCEPTION(e) \
+    if (_xrpl_guard_.has_value()) { \
+        _xrpl_guard_->recordException(e); \
+    }
+
+#else  // XRPL_ENABLE_TELEMETRY not defined
+
+#define XRPL_TRACE_SPAN(telemetry, name) ((void)0)
+#define XRPL_TRACE_SPAN_KIND(telemetry, name, kind) ((void)0)
+#define XRPL_TRACE_TX(telemetry, name) ((void)0)
+#define XRPL_TRACE_CONSENSUS(telemetry, name) ((void)0)
+#define XRPL_TRACE_RPC(telemetry, name) ((void)0)
+#define XRPL_TRACE_SET_ATTR(key, value) ((void)0)
+#define XRPL_TRACE_EXCEPTION(e) ((void)0)
+
+#endif  // XRPL_ENABLE_TELEMETRY
+
+} // namespace telemetry
+} // namespace xrpl
+```
+
+---
+
+## 4.4 Protocol Buffer Extensions
+
+### 4.4.1 TraceContext Message Definition
+
+Add to `src/xrpld/overlay/detail/ripple.proto`:
+
+```protobuf
+// Trace context for distributed tracing across nodes
+// Uses W3C Trace Context format internally
+message TraceContext {
+    // 16-byte trace identifier (required for valid context)
+    bytes trace_id = 1;
+
+    // 8-byte span identifier of parent span
+    bytes span_id = 2;
+
+    // Trace flags (bit 0 = sampled)
+    uint32 trace_flags = 3;
+
+    // W3C tracestate header value for vendor-specific data
+    string trace_state = 4;
+}
+
+// Extend existing messages with optional trace context
+// High field numbers (1000+) to avoid conflicts
+
+message TMTransaction {
+    // ... existing fields ...
+
+    // Optional trace context for distributed tracing
+    optional TraceContext trace_context = 1001;
+}
+
+message TMProposeSet {
+    // ... existing fields ...
+    optional TraceContext trace_context = 1001;
+}
+
+message TMValidation {
+    // ... existing fields ...
+    optional TraceContext trace_context = 1001;
+}
+
+message TMGetLedger {
+    // ... existing fields ...
+    optional TraceContext trace_context = 1001;
+}
+
+message TMLedgerData {
+    // ... existing fields ...
+    optional TraceContext trace_context = 1001;
+}
+```
+
+### 4.4.2 Context Serialization/Deserialization
+
+```cpp
+// include/xrpl/telemetry/TraceContext.h
+#pragma once
+
+#include <opentelemetry/context/context.h>
+#include <opentelemetry/trace/span_context.h>
+#include <protocol/messages.h>  // Generated protobuf
+
+#include <optional>
+#include <string>
+
+namespace xrpl {
+namespace telemetry {
+
+/**
+ * Utilities for trace context serialization and propagation.
+ */
+class TraceContextPropagator
+{
+public:
+    /**
+     * Extract trace context from Protocol Buffer message.
+     * Returns empty context if no trace info present.
+     */
+    static opentelemetry::context::Context
+    extract(protocol::TraceContext const& proto);
+
+    /**
+     * Inject current trace context into Protocol Buffer message.
+     */
+    static void
+    inject(
+        opentelemetry::context::Context const& ctx,
+        protocol::TraceContext& proto);
+
+    /**
+     * Extract trace context from HTTP headers (for RPC).
+     * Supports W3C Trace Context (traceparent, tracestate).
+     */
+    static opentelemetry::context::Context
+    extractFromHeaders(
+        std::function<std::optional<std::string>(std::string_view)> headerGetter);
+
+    /**
+     * Inject trace context into HTTP headers (for RPC responses).
+     */
+    static void
+    injectToHeaders(
+        opentelemetry::context::Context const& ctx,
+        std::function<void(std::string_view, std::string_view)> headerSetter);
+};
+
+// ═══════════════════════════════════════════════════════════════════════════
+// IMPLEMENTATION
+// ═══════════════════════════════════════════════════════════════════════════
+
+inline opentelemetry::context::Context
+TraceContextPropagator::extract(protocol::TraceContext const& proto)
+{
+    using namespace opentelemetry::trace;
+
+    if (proto.trace_id().size() != 16 || proto.span_id().size() != 8)
+        return opentelemetry::context::Context{};  // Invalid, return empty
+
+    // Construct TraceId and SpanId from bytes
+    TraceId traceId(reinterpret_cast<uint8_t const*>(proto.trace_id().data()));
+    SpanId spanId(reinterpret_cast<uint8_t const*>(proto.span_id().data()));
+    TraceFlags flags(static_cast<uint8_t>(proto.trace_flags()));
+
+    // Create SpanContext from extracted data
+    SpanContext spanContext(traceId, spanId, flags, /* remote = */ true);
+
+    // Create context with extracted span as parent
+    return opentelemetry::context::Context{}.SetValue(
+        opentelemetry::trace::kSpanKey,
+        opentelemetry::nostd::shared_ptr<Span>(
+            new DefaultSpan(spanContext)));
+}
+
+inline void
+TraceContextPropagator::inject(
+    opentelemetry::context::Context const& ctx,
+    protocol::TraceContext& proto)
+{
+    using namespace opentelemetry::trace;
+
+    // Get current span from context
+    auto span = GetSpan(ctx);
+    if (!span)
+        return;
+
+    auto const& spanCtx = span->GetContext();
+    if (!spanCtx.IsValid())
+        return;
+
+    // Serialize trace_id (16 bytes)
+    auto const& traceId = spanCtx.trace_id();
+    proto.set_trace_id(traceId.Id().data(), TraceId::kSize);
+
+    // Serialize span_id (8 bytes)
+    auto const& spanId = spanCtx.span_id();
+    proto.set_span_id(spanId.Id().data(), SpanId::kSize);
+
+    // Serialize flags
+    proto.set_trace_flags(spanCtx.trace_flags().flags());
+
+    // Note: tracestate not implemented yet
+}
+
+} // namespace telemetry
+} // namespace xrpl
+```
+
+---
+
+## 4.5 Module-Specific Instrumentation
+
+### 4.5.1 Transaction Relay Instrumentation
+
+```cpp
+// src/xrpld/overlay/detail/PeerImp.cpp (modified)
+
+#include <xrpl/telemetry/TracingInstrumentation.h>
+
+void
+PeerImp::handleTransaction(
+    std::shared_ptr<protocol::TMTransaction> const& m)
+{
+    // Extract trace context from incoming message
+    opentelemetry::context::Context parentCtx;
+    if (m->has_trace_context())
+    {
+        parentCtx = telemetry::TraceContextPropagator::extract(
+            m->trace_context());
+    }
+
+    // Start span as child of remote span (cross-node link)
+    auto span = app_.getTelemetry().startSpan(
+        "tx.receive",
+        parentCtx,
+        opentelemetry::trace::SpanKind::kServer);
+    telemetry::SpanGuard guard(span);
+
+    try
+    {
+        // Parse and validate transaction
+        SerialIter sit(makeSlice(m->rawtransaction()));
+        auto stx = std::make_shared<STTx const>(sit);
+
+        // Add transaction attributes
+        guard.setAttribute("xrpl.tx.hash", to_string(stx->getTransactionID()));
+        guard.setAttribute("xrpl.tx.type", stx->getTxnType());
+        guard.setAttribute("xrpl.peer.id", remote_address_.to_string());
+
+        // Check if we've seen this transaction (HashRouter)
+        auto const [flags, suppressed] =
+            app_.getHashRouter().addSuppressionPeer(
+                stx->getTransactionID(),
+                id_);
+
+        if (suppressed)
+        {
+            guard.setAttribute("xrpl.tx.suppressed", true);
+            guard.addEvent("tx.duplicate");
+            return;  // Already processing this transaction
+        }
+
+        // Create child span for validation
+        {
+            auto validateSpan = app_.getTelemetry().startSpan("tx.validate");
+            telemetry::SpanGuard validateGuard(validateSpan);
+
+            auto [validity, reason] = checkTransaction(stx);
+            validateGuard.setAttribute("xrpl.tx.validity",
+                validity == Validity::Valid ? "valid" : "invalid");
+
+            if (validity != Validity::Valid)
+            {
+                validateGuard.setStatus(
+                    opentelemetry::trace::StatusCode::kError,
+                    reason);
+                return;
+            }
+        }
+
+        // Relay to other peers (capture context for propagation)
+        auto ctx = guard.context();
+
+        // Create child span for relay
+        auto relaySpan = app_.getTelemetry().startSpan(
+            "tx.relay",
+            ctx,
+            opentelemetry::trace::SpanKind::kClient);
+        {
+            telemetry::SpanGuard relayGuard(relaySpan);
+
+            // Inject context into outgoing message
+            protocol::TraceContext protoCtx;
+            telemetry::TraceContextPropagator::inject(
+                relayGuard.context(), protoCtx);
+
+            // Relay to other peers
+            app_.overlay().relay(
+                stx->getTransactionID(),
+                *m,
+                protoCtx,  // Pass trace context
+                exclusions);
+
+            relayGuard.setAttribute("xrpl.tx.relay_count",
+                static_cast<int64_t>(relayCount));
+        }
+
+        guard.setOk();
+    }
+    catch (std::exception const& e)
+    {
+        guard.recordException(e);
+        JLOG(journal_.warn()) << "Transaction handling failed: " << e.what();
+    }
+}
+```
+
+### 4.5.2 Consensus Instrumentation
+
+```cpp
+// src/xrpld/app/consensus/RCLConsensus.cpp (modified)
+
+#include <xrpl/telemetry/TracingInstrumentation.h>
+
+void
+RCLConsensusAdaptor::startRound(
+    NetClock::time_point const& now,
+    RCLCxLedger::ID const& prevLedgerHash,
+    RCLCxLedger const& prevLedger,
+    hash_set<NodeID> const& peers,
+    bool proposing)
+{
+    XRPL_TRACE_CONSENSUS(app_.getTelemetry(), "consensus.round");
+
+    XRPL_TRACE_SET_ATTR("xrpl.consensus.ledger.prev", to_string(prevLedgerHash));
+    XRPL_TRACE_SET_ATTR("xrpl.consensus.ledger.seq",
+        static_cast<int64_t>(prevLedger.seq() + 1));
+    XRPL_TRACE_SET_ATTR("xrpl.consensus.proposers",
+        static_cast<int64_t>(peers.size()));
+    XRPL_TRACE_SET_ATTR("xrpl.consensus.mode",
+        proposing ? "proposing" : "observing");
+
+    // Store trace context for use in phase transitions
+    currentRoundContext_ = _xrpl_guard_.has_value()
+        ? _xrpl_guard_->context()
+        : opentelemetry::context::Context{};
+
+    // ... existing implementation ...
+}
+
+ConsensusPhase
+RCLConsensusAdaptor::phaseTransition(ConsensusPhase newPhase)
+{
+    // Create span for phase transition
+    auto span = app_.getTelemetry().startSpan(
+        "consensus.phase." + to_string(newPhase),
+        currentRoundContext_);
+    telemetry::SpanGuard guard(span);
+
+    guard.setAttribute("xrpl.consensus.phase", to_string(newPhase));
+    guard.addEvent("phase.enter");
+
+    auto const startTime = std::chrono::steady_clock::now();
+
+    try
+    {
+        auto result = doPhaseTransition(newPhase);
+
+        auto const duration = std::chrono::steady_clock::now() - startTime;
+        guard.setAttribute("xrpl.consensus.phase_duration_ms",
+            std::chrono::duration<double, std::milli>(duration).count());
+
+        guard.setOk();
+        return result;
+    }
+    catch (std::exception const& e)
+    {
+        guard.recordException(e);
+        throw;
+    }
+}
+
+void
+RCLConsensusAdaptor::peerProposal(
+    NetClock::time_point const& now,
+    RCLCxPeerPos const& proposal)
+{
+    // Extract trace context from proposal message
+    opentelemetry::context::Context parentCtx;
+    if (proposal.hasTraceContext())
+    {
+        parentCtx = telemetry::TraceContextPropagator::extract(
+            proposal.traceContext());
+    }
+
+    auto span = app_.getTelemetry().startSpan(
+        "consensus.proposal.receive",
+        parentCtx,
+        opentelemetry::trace::SpanKind::kServer);
+    telemetry::SpanGuard guard(span);
+
+    guard.setAttribute("xrpl.consensus.proposer",
+        toBase58(TokenType::NodePublic, proposal.nodeId()));
+    guard.setAttribute("xrpl.consensus.round",
+        static_cast<int64_t>(proposal.proposal().proposeSeq()));
+
+    // ... existing implementation ...
+
+    guard.setOk();
+}
+```
+
+### 4.5.3 RPC Handler Instrumentation
+
+```cpp
+// src/xrpld/rpc/detail/ServerHandler.cpp (modified)
+
+#include <xrpl/telemetry/TracingInstrumentation.h>
+
+void
+ServerHandler::onRequest(
+    http_request_type&& req,
+    std::function<void(http_response_type&&)>&& send)
+{
+    // Extract trace context from HTTP headers (W3C Trace Context)
+    auto parentCtx = telemetry::TraceContextPropagator::extractFromHeaders(
+        [&req](std::string_view name) -> std::optional<std::string> {
+            auto it = req.find(boost::beast::http::field{
+                std::string(name)});
+            if (it != req.end())
+                return std::string(it->value());
+            return std::nullopt;
+        });
+
+    // Start request span
+    auto span = app_.getTelemetry().startSpan(
+        "rpc.request",
+        parentCtx,
+        opentelemetry::trace::SpanKind::kServer);
+    telemetry::SpanGuard guard(span);
+
+    // Add HTTP attributes
+    guard.setAttribute("http.method", std::string(req.method_string()));
+    guard.setAttribute("http.target", std::string(req.target()));
+    guard.setAttribute("http.user_agent",
+        std::string(req[boost::beast::http::field::user_agent]));
+
+    auto const startTime = std::chrono::steady_clock::now();
+
+    try
+    {
+        // Parse and process request
+        auto const& body = req.body();
+        Json::Value jv;
+        Json::Reader reader;
+
+        if (!reader.parse(body, jv))
+        {
+            guard.setStatus(
+                opentelemetry::trace::StatusCode::kError,
+                "Invalid JSON");
+            sendError(send, "Invalid JSON");
+            return;
+        }
+
+        // Extract command name
+        std::string command = jv.isMember("command")
+            ? jv["command"].asString()
+            : jv.isMember("method")
+                ? jv["method"].asString()
+                : "unknown";
+
+        guard.setAttribute("xrpl.rpc.command", command);
+
+        // Create child span for command execution
+        auto cmdSpan = app_.getTelemetry().startSpan(
+            "rpc.command." + command);
+        {
+            telemetry::SpanGuard cmdGuard(cmdSpan);
+
+            // Execute RPC command
+            auto result = processRequest(jv);
+
+            // Record result attributes
+            if (result.isMember("status"))
+            {
+                cmdGuard.setAttribute("xrpl.rpc.status",
+                    result["status"].asString());
+            }
+
+            if (result["status"].asString() == "error")
+            {
+                cmdGuard.setStatus(
+                    opentelemetry::trace::StatusCode::kError,
+                    result.isMember("error_message")
+                        ? result["error_message"].asString()
+                        : "RPC error");
+            }
+            else
+            {
+                cmdGuard.setOk();
+            }
+        }
+
+        auto const duration = std::chrono::steady_clock::now() - startTime;
+        guard.setAttribute("http.duration_ms",
+            std::chrono::duration<double, std::milli>(duration).count());
+
+        // Inject trace context into response headers
+        http_response_type resp;
+        telemetry::TraceContextPropagator::injectToHeaders(
+            guard.context(),
+            [&resp](std::string_view name, std::string_view value) {
+                resp.set(std::string(name), std::string(value));
+            });
+
+        guard.setOk();
+        send(std::move(resp));
+    }
+    catch (std::exception const& e)
+    {
+        guard.recordException(e);
+        JLOG(journal_.error()) << "RPC request failed: " << e.what();
+        sendError(send, e.what());
+    }
+}
+```
+
+### 4.5.4 JobQueue Context Propagation
+
+```cpp
+// src/xrpld/core/JobQueue.h (modified)
+
+#include <opentelemetry/context/context.h>
+
+class Job
+{
+    // ... existing members ...
+
+    // Captured trace context at job creation
+    opentelemetry::context::Context traceContext_;
+
+public:
+    // Constructor captures current trace context
+    Job(JobType type, std::function<void()> func, ...)
+        : type_(type)
+        , func_(std::move(func))
+        , traceContext_(opentelemetry::context::RuntimeContext::GetCurrent())
+        // ... other initializations ...
+    {
+    }
+
+    // Get trace context for restoration during execution
+    opentelemetry::context::Context const&
+    traceContext() const { return traceContext_; }
+};
+
+// src/xrpld/core/JobQueue.cpp (modified)
+
+void
+Worker::run()
+{
+    while (auto job = getJob())
+    {
+        // Restore trace context from job creation
+        auto token = opentelemetry::context::RuntimeContext::Attach(
+            job->traceContext());
+
+        // Start execution span
+        auto span = app_.getTelemetry().startSpan("job.execute");
+        telemetry::SpanGuard guard(span);
+
+        guard.setAttribute("xrpl.job.type", to_string(job->type()));
+        guard.setAttribute("xrpl.job.queue_ms", job->queueTimeMs());
+        guard.setAttribute("xrpl.job.worker", workerId_);
+
+        try
+        {
+            job->execute();
+            guard.setOk();
+        }
+        catch (std::exception const& e)
+        {
+            guard.recordException(e);
+            JLOG(journal_.error()) << "Job execution failed: " << e.what();
+        }
+    }
+}
+```
+
+---
+
+## 4.6 Span Flow Visualization
+
+<div align="center">
+
+```mermaid
+flowchart TB
+    subgraph Client["External Client"]
+        submit["Submit TX"]
+    end
+
+    subgraph NodeA["rippled Node A"]
+        rpcA["rpc.request"]
+        cmdA["rpc.command.submit"]
+        txRecvA["tx.receive"]
+        txValA["tx.validate"]
+        txRelayA["tx.relay"]
+    end
+
+    subgraph NodeB["rippled Node B"]
+        txRecvB["tx.receive"]
+        txValB["tx.validate"]
+        txRelayB["tx.relay"]
+    end
+
+    subgraph NodeC["rippled Node C"]
+        txRecvC["tx.receive"]
+        consensusC["consensus.round"]
+        phaseC["consensus.phase.establish"]
+    end
+
+    submit --> rpcA
+    rpcA --> cmdA
+    cmdA --> txRecvA
+    txRecvA --> txValA
+    txValA --> txRelayA
+    txRelayA -.->|"TraceContext"| txRecvB
+    txRecvB --> txValB
+    txValB --> txRelayB
+    txRelayB -.->|"TraceContext"| txRecvC
+    txRecvC --> consensusC
+    consensusC --> phaseC
+
+    style Client fill:#334155,stroke:#1e293b,color:#fff
+    style NodeA fill:#1e3a8a,stroke:#172554,color:#fff
+    style NodeB fill:#064e3b,stroke:#022c22,color:#fff
+    style NodeC fill:#78350f,stroke:#451a03,color:#fff
+    style submit fill:#e2e8f0,stroke:#cbd5e1,color:#1e293b
+    style rpcA fill:#1d4ed8,stroke:#1e40af,color:#fff
+    style cmdA fill:#1d4ed8,stroke:#1e40af,color:#fff
+    style txRecvA fill:#047857,stroke:#064e3b,color:#fff
+    style txValA fill:#047857,stroke:#064e3b,color:#fff
+    style txRelayA fill:#047857,stroke:#064e3b,color:#fff
+    style txRecvB fill:#047857,stroke:#064e3b,color:#fff
+    style txValB fill:#047857,stroke:#064e3b,color:#fff
+    style txRelayB fill:#047857,stroke:#064e3b,color:#fff
+    style txRecvC fill:#047857,stroke:#064e3b,color:#fff
+    style consensusC fill:#fef3c7,stroke:#fde68a,color:#1e293b
+    style phaseC fill:#fef3c7,stroke:#fde68a,color:#1e293b
+```
+
+</div>
+
+---
+
+_Previous: [Implementation Strategy](./03-implementation-strategy.md)_ | _Next: [Configuration Reference](./05-configuration-reference.md)_ | _Back to: [Overview](./OpenTelemetryPlan.md)_

OpenTelemetryPlan/05-configuration-reference.md

@@ -0,0 +1,958 @@
+# Configuration Reference
+
+> **Parent Document**: [OpenTelemetryPlan.md](./OpenTelemetryPlan.md)
+> **Related**: [Code Samples](./04-code-samples.md) | [Implementation Phases](./06-implementation-phases.md)
+
+---
+
+## 5.1 rippled Configuration
+
+### 5.1.1 Configuration File Section
+
+Add to `cfg/xrpld-example.cfg`:
+
+```ini
+# ═══════════════════════════════════════════════════════════════════════════════
+# TELEMETRY (OpenTelemetry Distributed Tracing)
+# ═══════════════════════════════════════════════════════════════════════════════
+#
+# Enables distributed tracing for transaction flow, consensus, and RPC calls.
+# Traces are exported to an OpenTelemetry Collector using OTLP protocol.
+#
+# [telemetry]
+#
+# # Enable/disable telemetry (default: 0 = disabled)
+# enabled=1
+#
+# # Exporter type: "otlp_grpc" (default), "otlp_http", or "none"
+# exporter=otlp_grpc
+#
+# # OTLP endpoint (default: localhost:4317 for gRPC, localhost:4318 for HTTP)
+# endpoint=localhost:4317
+#
+# # Use TLS for exporter connection (default: 0)
+# use_tls=0
+#
+# # Path to CA certificate for TLS (optional)
+# # tls_ca_cert=/path/to/ca.crt
+#
+# # Sampling ratio: 0.0-1.0 (default: 1.0 = 100% sampling)
+# # Use lower values in production to reduce overhead
+# sampling_ratio=0.1
+#
+# # Batch processor settings
+# batch_size=512           # Spans per batch (default: 512)
+# batch_delay_ms=5000      # Max delay before sending batch (default: 5000)
+# max_queue_size=2048      # Max queued spans (default: 2048)
+#
+# # Component-specific tracing (default: all enabled except peer)
+# trace_transactions=1     # Transaction relay and processing
+# trace_consensus=1        # Consensus rounds and proposals
+# trace_rpc=1              # RPC request handling
+# trace_peer=0             # Peer messages (high volume, disabled by default)
+# trace_ledger=1           # Ledger acquisition and building
+#
+# # Service identification (automatically detected if not specified)
+# # service_name=rippled
+# # service_instance_id=<node_public_key>
+
+[telemetry]
+enabled=0
+```
+
+### 5.1.2 Configuration Options Summary
+
+| Option                | Type   | Default          | Description                               |
+| --------------------- | ------ | ---------------- | ----------------------------------------- |
+| `enabled`             | bool   | `false`          | Enable/disable telemetry                  |
+| `exporter`            | string | `"otlp_grpc"`    | Exporter type: otlp_grpc, otlp_http, none |
+| `endpoint`            | string | `localhost:4317` | OTLP collector endpoint                   |
+| `use_tls`             | bool   | `false`          | Enable TLS for exporter connection        |
+| `tls_ca_cert`         | string | `""`             | Path to CA certificate file               |
+| `sampling_ratio`      | float  | `1.0`            | Sampling ratio (0.0-1.0)                  |
+| `batch_size`          | uint   | `512`            | Spans per export batch                    |
+| `batch_delay_ms`      | uint   | `5000`           | Max delay before sending batch (ms)       |
+| `max_queue_size`      | uint   | `2048`           | Maximum queued spans                      |
+| `trace_transactions`  | bool   | `true`           | Enable transaction tracing                |
+| `trace_consensus`     | bool   | `true`           | Enable consensus tracing                  |
+| `trace_rpc`           | bool   | `true`           | Enable RPC tracing                        |
+| `trace_peer`          | bool   | `false`          | Enable peer message tracing (high volume) |
+| `trace_ledger`        | bool   | `true`           | Enable ledger tracing                     |
+| `service_name`        | string | `"rippled"`      | Service name for traces                   |
+| `service_instance_id` | string | `<node_pubkey>`  | Instance identifier                       |
+
+---
+
+## 5.2 Configuration Parser
+
+```cpp
+// src/libxrpl/telemetry/TelemetryConfig.cpp
+
+#include <xrpl/telemetry/Telemetry.h>
+#include <xrpl/basics/Log.h>
+
+namespace xrpl {
+namespace telemetry {
+
+Telemetry::Setup
+setup_Telemetry(
+    Section const& section,
+    std::string const& nodePublicKey,
+    std::string const& version)
+{
+    Telemetry::Setup setup;
+
+    // Basic settings
+    setup.enabled = section.value_or("enabled", false);
+    setup.serviceName = section.value_or("service_name", "rippled");
+    setup.serviceVersion = version;
+    setup.serviceInstanceId = section.value_or(
+        "service_instance_id", nodePublicKey);
+
+    // Exporter settings
+    setup.exporterType = section.value_or("exporter", "otlp_grpc");
+
+    if (setup.exporterType == "otlp_grpc")
+        setup.exporterEndpoint = section.value_or("endpoint", "localhost:4317");
+    else if (setup.exporterType == "otlp_http")
+        setup.exporterEndpoint = section.value_or("endpoint", "localhost:4318");
+
+    setup.useTls = section.value_or("use_tls", false);
+    setup.tlsCertPath = section.value_or("tls_ca_cert", "");
+
+    // Sampling
+    setup.samplingRatio = section.value_or("sampling_ratio", 1.0);
+    if (setup.samplingRatio < 0.0 || setup.samplingRatio > 1.0)
+    {
+        Throw<std::runtime_error>(
+            "telemetry.sampling_ratio must be between 0.0 and 1.0");
+    }
+
+    // Batch processor
+    setup.batchSize = section.value_or("batch_size", 512u);
+    setup.batchDelay = std::chrono::milliseconds{
+        section.value_or("batch_delay_ms", 5000u)};
+    setup.maxQueueSize = section.value_or("max_queue_size", 2048u);
+
+    // Component filtering
+    setup.traceTransactions = section.value_or("trace_transactions", true);
+    setup.traceConsensus = section.value_or("trace_consensus", true);
+    setup.traceRpc = section.value_or("trace_rpc", true);
+    setup.tracePeer = section.value_or("trace_peer", false);
+    setup.traceLedger = section.value_or("trace_ledger", true);
+
+    return setup;
+}
+
+} // namespace telemetry
+} // namespace xrpl
+```
+
+---
+
+## 5.3 Application Integration
+
+### 5.3.1 ApplicationImp Changes
+
+```cpp
+// src/xrpld/app/main/Application.cpp (modified)
+
+#include <xrpl/telemetry/Telemetry.h>
+
+class ApplicationImp : public Application
+{
+    // ... existing members ...
+
+    // Telemetry (must be constructed early, destroyed late)
+    std::unique_ptr<telemetry::Telemetry> telemetry_;
+
+public:
+    ApplicationImp(...)
+    {
+        // Initialize telemetry early (before other components)
+        auto telemetrySection = config_->section("telemetry");
+        auto telemetrySetup = telemetry::setup_Telemetry(
+            telemetrySection,
+            toBase58(TokenType::NodePublic, nodeIdentity_.publicKey()),
+            BuildInfo::getVersionString());
+
+        // Set network attributes
+        telemetrySetup.networkId = config_->NETWORK_ID;
+        telemetrySetup.networkType = [&]() {
+            if (config_->NETWORK_ID == 0) return "mainnet";
+            if (config_->NETWORK_ID == 1) return "testnet";
+            if (config_->NETWORK_ID == 2) return "devnet";
+            return "custom";
+        }();
+
+        telemetry_ = telemetry::make_Telemetry(
+            telemetrySetup,
+            logs_->journal("Telemetry"));
+
+        // ... rest of initialization ...
+    }
+
+    void start() override
+    {
+        // Start telemetry first
+        if (telemetry_)
+            telemetry_->start();
+
+        // ... existing start code ...
+    }
+
+    void stop() override
+    {
+        // ... existing stop code ...
+
+        // Stop telemetry last (to capture shutdown spans)
+        if (telemetry_)
+            telemetry_->stop();
+    }
+
+    telemetry::Telemetry& getTelemetry() override
+    {
+        assert(telemetry_);
+        return *telemetry_;
+    }
+};
+```
+
+### 5.3.2 Application Interface Addition
+
+```cpp
+// include/xrpl/app/main/Application.h (modified)
+
+namespace telemetry { class Telemetry; }
+
+class Application
+{
+public:
+    // ... existing virtual methods ...
+
+    /** Get the telemetry system for distributed tracing */
+    virtual telemetry::Telemetry& getTelemetry() = 0;
+};
+```
+
+---
+
+## 5.4 CMake Integration
+
+### 5.4.1 Find OpenTelemetry Module
+
+```cmake
+# cmake/FindOpenTelemetry.cmake
+
+# Find OpenTelemetry C++ SDK
+#
+# This module defines:
+#   OpenTelemetry_FOUND - System has OpenTelemetry
+#   OpenTelemetry::api - API library target
+#   OpenTelemetry::sdk - SDK library target
+#   OpenTelemetry::otlp_grpc_exporter - OTLP gRPC exporter target
+#   OpenTelemetry::otlp_http_exporter - OTLP HTTP exporter target
+
+find_package(opentelemetry-cpp CONFIG QUIET)
+
+if(opentelemetry-cpp_FOUND)
+    set(OpenTelemetry_FOUND TRUE)
+
+    # Create imported targets if not already created by config
+    if(NOT TARGET OpenTelemetry::api)
+        add_library(OpenTelemetry::api ALIAS opentelemetry-cpp::api)
+    endif()
+    if(NOT TARGET OpenTelemetry::sdk)
+        add_library(OpenTelemetry::sdk ALIAS opentelemetry-cpp::sdk)
+    endif()
+    if(NOT TARGET OpenTelemetry::otlp_grpc_exporter)
+        add_library(OpenTelemetry::otlp_grpc_exporter ALIAS
+            opentelemetry-cpp::otlp_grpc_exporter)
+    endif()
+else()
+    # Try pkg-config fallback
+    find_package(PkgConfig QUIET)
+    if(PKG_CONFIG_FOUND)
+        pkg_check_modules(OTEL opentelemetry-cpp QUIET)
+        if(OTEL_FOUND)
+            set(OpenTelemetry_FOUND TRUE)
+            # Create imported targets from pkg-config
+            add_library(OpenTelemetry::api INTERFACE IMPORTED)
+            target_include_directories(OpenTelemetry::api INTERFACE
+                ${OTEL_INCLUDE_DIRS})
+        endif()
+    endif()
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(OpenTelemetry
+    REQUIRED_VARS OpenTelemetry_FOUND)
+```
+
+### 5.4.2 CMakeLists.txt Changes
+
+```cmake
+# CMakeLists.txt (additions)
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# TELEMETRY OPTIONS
+# ═══════════════════════════════════════════════════════════════════════════════
+
+option(XRPL_ENABLE_TELEMETRY
+    "Enable OpenTelemetry distributed tracing support" OFF)
+
+if(XRPL_ENABLE_TELEMETRY)
+    find_package(OpenTelemetry REQUIRED)
+
+    # Define compile-time flag
+    add_compile_definitions(XRPL_ENABLE_TELEMETRY)
+
+    message(STATUS "OpenTelemetry tracing: ENABLED")
+else()
+    message(STATUS "OpenTelemetry tracing: DISABLED")
+endif()
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# TELEMETRY LIBRARY
+# ═══════════════════════════════════════════════════════════════════════════════
+
+if(XRPL_ENABLE_TELEMETRY)
+    add_library(xrpl_telemetry
+        src/libxrpl/telemetry/Telemetry.cpp
+        src/libxrpl/telemetry/TelemetryConfig.cpp
+        src/libxrpl/telemetry/TraceContext.cpp
+    )
+
+    target_include_directories(xrpl_telemetry
+        PUBLIC
+            ${CMAKE_CURRENT_SOURCE_DIR}/include
+    )
+
+    target_link_libraries(xrpl_telemetry
+        PUBLIC
+            OpenTelemetry::api
+            OpenTelemetry::sdk
+            OpenTelemetry::otlp_grpc_exporter
+        PRIVATE
+            xrpl_basics
+    )
+
+    # Add to main library dependencies
+    target_link_libraries(xrpld PRIVATE xrpl_telemetry)
+else()
+    # Create null implementation library
+    add_library(xrpl_telemetry
+        src/libxrpl/telemetry/NullTelemetry.cpp
+    )
+    target_include_directories(xrpl_telemetry
+        PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include
+    )
+endif()
+```
+
+---
+
+## 5.5 OpenTelemetry Collector Configuration
+
+### 5.5.1 Development Configuration
+
+```yaml
+# otel-collector-dev.yaml
+# Minimal configuration for local development
+
+receivers:
+  otlp:
+    protocols:
+      grpc:
+        endpoint: 0.0.0.0:4317
+      http:
+        endpoint: 0.0.0.0:4318
+
+processors:
+  batch:
+    timeout: 1s
+    send_batch_size: 100
+
+exporters:
+  # Console output for debugging
+  logging:
+    verbosity: detailed
+    sampling_initial: 5
+    sampling_thereafter: 200
+
+  # Jaeger for trace visualization
+  jaeger:
+    endpoint: jaeger:14250
+    tls:
+      insecure: true
+
+  # Grafana Tempo for trace storage
+  otlp/tempo:
+    endpoint: tempo:4317
+    tls:
+      insecure: true
+
+service:
+  pipelines:
+    traces:
+      receivers: [otlp]
+      processors: [batch]
+      exporters: [logging, jaeger, otlp/tempo]
+```
+
+### 5.5.2 Production Configuration
+
+```yaml
+# otel-collector-prod.yaml
+# Production configuration with filtering, sampling, and multiple backends
+
+receivers:
+  otlp:
+    protocols:
+      grpc:
+        endpoint: 0.0.0.0:4317
+        tls:
+          cert_file: /etc/otel/server.crt
+          key_file: /etc/otel/server.key
+          ca_file: /etc/otel/ca.crt
+
+processors:
+  # Memory limiter to prevent OOM
+  memory_limiter:
+    check_interval: 1s
+    limit_mib: 1000
+    spike_limit_mib: 200
+
+  # Batch processing for efficiency
+  batch:
+    timeout: 5s
+    send_batch_size: 512
+    send_batch_max_size: 1024
+
+  # Tail-based sampling (keep errors and slow traces)
+  tail_sampling:
+    decision_wait: 10s
+    num_traces: 100000
+    expected_new_traces_per_sec: 1000
+    policies:
+      # Always keep error traces
+      - name: errors
+        type: status_code
+        status_code:
+          status_codes: [ERROR]
+      # Keep slow consensus rounds (>5s)
+      - name: slow-consensus
+        type: latency
+        latency:
+          threshold_ms: 5000
+      # Keep slow RPC requests (>1s)
+      - name: slow-rpc
+        type: and
+        and:
+          and_sub_policy:
+            - name: rpc-spans
+              type: string_attribute
+              string_attribute:
+                key: xrpl.rpc.command
+                values: [".*"]
+                enabled_regex_matching: true
+            - name: latency
+              type: latency
+              latency:
+                threshold_ms: 1000
+      # Probabilistic sampling for the rest
+      - name: probabilistic
+        type: probabilistic
+        probabilistic:
+          sampling_percentage: 10
+
+  # Attribute processing
+  attributes:
+    actions:
+      # Hash sensitive data
+      - key: xrpl.tx.account
+        action: hash
+      # Add deployment info
+      - key: deployment.environment
+        value: production
+        action: upsert
+
+exporters:
+  # Grafana Tempo for long-term storage
+  otlp/tempo:
+    endpoint: tempo.monitoring:4317
+    tls:
+      insecure: false
+      ca_file: /etc/otel/tempo-ca.crt
+
+  # Elastic APM for correlation with logs
+  otlp/elastic:
+    endpoint: apm.elastic:8200
+    headers:
+      Authorization: "Bearer ${ELASTIC_APM_TOKEN}"
+
+extensions:
+  health_check:
+    endpoint: 0.0.0.0:13133
+  zpages:
+    endpoint: 0.0.0.0:55679
+
+service:
+  extensions: [health_check, zpages]
+  pipelines:
+    traces:
+      receivers: [otlp]
+      processors: [memory_limiter, tail_sampling, attributes, batch]
+      exporters: [otlp/tempo, otlp/elastic]
+```
+
+---
+
+## 5.6 Docker Compose Development Environment
+
+```yaml
+# docker-compose-telemetry.yaml
+version: "3.8"
+
+services:
+  # OpenTelemetry Collector
+  otel-collector:
+    image: otel/opentelemetry-collector-contrib:0.92.0
+    container_name: otel-collector
+    command: ["--config=/etc/otel-collector-config.yaml"]
+    volumes:
+      - ./otel-collector-dev.yaml:/etc/otel-collector-config.yaml:ro
+    ports:
+      - "4317:4317" # OTLP gRPC
+      - "4318:4318" # OTLP HTTP
+      - "13133:13133" # Health check
+    depends_on:
+      - jaeger
+
+  # Jaeger for trace visualization
+  jaeger:
+    image: jaegertracing/all-in-one:1.53
+    container_name: jaeger
+    environment:
+      - COLLECTOR_OTLP_ENABLED=true
+    ports:
+      - "16686:16686" # UI
+      - "14250:14250" # gRPC
+
+  # Grafana Tempo for trace storage (recommended for production)
+  tempo:
+    image: grafana/tempo:2.7.2
+    container_name: tempo
+    command: ["-config.file=/etc/tempo.yaml"]
+    volumes:
+      - ./tempo.yaml:/etc/tempo.yaml:ro
+      - tempo-data:/var/tempo
+    ports:
+      - "3200:3200" # HTTP API
+
+  # Grafana for dashboards
+  grafana:
+    image: grafana/grafana:10.2.3
+    container_name: grafana
+    environment:
+      - GF_AUTH_ANONYMOUS_ENABLED=true
+      - GF_AUTH_ANONYMOUS_ORG_ROLE=Admin
+    volumes:
+      - ./grafana/provisioning:/etc/grafana/provisioning:ro
+      - ./grafana/dashboards:/var/lib/grafana/dashboards:ro
+    ports:
+      - "3000:3000"
+    depends_on:
+      - jaeger
+      - tempo
+
+  # Prometheus for metrics (optional, for correlation)
+  prometheus:
+    image: prom/prometheus:v2.48.1
+    container_name: prometheus
+    volumes:
+      - ./prometheus.yaml:/etc/prometheus/prometheus.yml:ro
+    ports:
+      - "9090:9090"
+
+networks:
+  default:
+    name: rippled-telemetry
+```
+
+---
+
+## 5.7 Configuration Architecture
+
+```mermaid
+flowchart TB
+    subgraph config["Configuration Sources"]
+        cfgFile["xrpld.cfg<br/>[telemetry] section"]
+        cmake["CMake<br/>XRPL_ENABLE_TELEMETRY"]
+    end
+
+    subgraph init["Initialization"]
+        parse["setup_Telemetry()"]
+        factory["make_Telemetry()"]
+    end
+
+    subgraph runtime["Runtime Components"]
+        tracer["TracerProvider"]
+        exporter["OTLP Exporter"]
+        processor["BatchProcessor"]
+    end
+
+    subgraph collector["Collector Pipeline"]
+        recv["Receivers"]
+        proc["Processors"]
+        exp["Exporters"]
+    end
+
+    cfgFile --> parse
+    cmake -->|"compile flag"| parse
+    parse --> factory
+    factory --> tracer
+    tracer --> processor
+    processor --> exporter
+    exporter -->|"OTLP"| recv
+    recv --> proc
+    proc --> exp
+
+    style config fill:#e3f2fd,stroke:#1976d2
+    style runtime fill:#e8f5e9,stroke:#388e3c
+    style collector fill:#fff3e0,stroke:#ff9800
+```
+
+---
+
+## 5.8 Grafana Integration
+
+Step-by-step instructions for integrating rippled traces with Grafana.
+
+### 5.8.1 Data Source Configuration
+
+#### Tempo (Recommended)
+
+```yaml
+# grafana/provisioning/datasources/tempo.yaml
+apiVersion: 1
+
+datasources:
+  - name: Tempo
+    type: tempo
+    access: proxy
+    url: http://tempo:3200
+    jsonData:
+      httpMethod: GET
+      tracesToLogs:
+        datasourceUid: loki
+        tags: ["service.name", "xrpl.tx.hash"]
+        mappedTags: [{ key: "trace_id", value: "traceID" }]
+        mapTagNamesEnabled: true
+        filterByTraceID: true
+      serviceMap:
+        datasourceUid: prometheus
+      nodeGraph:
+        enabled: true
+      search:
+        hide: false
+      lokiSearch:
+        datasourceUid: loki
+```
+
+#### Jaeger
+
+```yaml
+# grafana/provisioning/datasources/jaeger.yaml
+apiVersion: 1
+
+datasources:
+  - name: Jaeger
+    type: jaeger
+    access: proxy
+    url: http://jaeger:16686
+    jsonData:
+      tracesToLogs:
+        datasourceUid: loki
+        tags: ["service.name"]
+```
+
+#### Elastic APM
+
+```yaml
+# grafana/provisioning/datasources/elastic-apm.yaml
+apiVersion: 1
+
+datasources:
+  - name: Elasticsearch-APM
+    type: elasticsearch
+    access: proxy
+    url: http://elasticsearch:9200
+    database: "apm-*"
+    jsonData:
+      esVersion: "8.0.0"
+      timeField: "@timestamp"
+      logMessageField: message
+      logLevelField: log.level
+```
+
+### 5.8.2 Dashboard Provisioning
+
+```yaml
+# grafana/provisioning/dashboards/dashboards.yaml
+apiVersion: 1
+
+providers:
+  - name: "rippled-dashboards"
+    orgId: 1
+    folder: "rippled"
+    folderUid: "rippled"
+    type: file
+    disableDeletion: false
+    updateIntervalSeconds: 30
+    options:
+      path: /var/lib/grafana/dashboards/rippled
+```
+
+### 5.8.3 Example Dashboard: RPC Performance
+
+```json
+{
+  "title": "rippled RPC Performance",
+  "uid": "rippled-rpc-performance",
+  "panels": [
+    {
+      "title": "RPC Latency by Command",
+      "type": "heatmap",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\" && span.xrpl.rpc.command != \"\"} | histogram_over_time(duration) by (span.xrpl.rpc.command)"
+        }
+      ],
+      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 0 }
+    },
+    {
+      "title": "RPC Error Rate",
+      "type": "timeseries",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\" && status.code=error} | rate() by (span.xrpl.rpc.command)"
+        }
+      ],
+      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 0 }
+    },
+    {
+      "title": "Top 10 Slowest RPC Commands",
+      "type": "table",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\" && span.xrpl.rpc.command != \"\"} | avg(duration) by (span.xrpl.rpc.command) | topk(10)"
+        }
+      ],
+      "gridPos": { "h": 8, "w": 24, "x": 0, "y": 8 }
+    },
+    {
+      "title": "Recent Traces",
+      "type": "table",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\"}"
+        }
+      ],
+      "gridPos": { "h": 8, "w": 24, "x": 0, "y": 16 }
+    }
+  ]
+}
+```
+
+### 5.8.4 Example Dashboard: Transaction Tracing
+
+```json
+{
+  "title": "rippled Transaction Tracing",
+  "uid": "rippled-tx-tracing",
+  "panels": [
+    {
+      "title": "Transaction Throughput",
+      "type": "stat",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\" && name=\"tx.receive\"} | rate()"
+        }
+      ],
+      "gridPos": { "h": 4, "w": 6, "x": 0, "y": 0 }
+    },
+    {
+      "title": "Cross-Node Relay Count",
+      "type": "timeseries",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\" && name=\"tx.relay\"} | avg(span.xrpl.tx.relay_count)"
+        }
+      ],
+      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 4 }
+    },
+    {
+      "title": "Transaction Validation Errors",
+      "type": "table",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\" && name=\"tx.validate\" && status.code=error}"
+        }
+      ],
+      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 4 }
+    }
+  ]
+}
+```
+
+### 5.8.5 TraceQL Query Examples
+
+Common queries for rippled traces:
+
+```
+# Find all traces for a specific transaction hash
+{resource.service.name="rippled" && span.xrpl.tx.hash="ABC123..."}
+
+# Find slow RPC commands (>100ms)
+{resource.service.name="rippled" && name=~"rpc.command.*"} | duration > 100ms
+
+# Find consensus rounds taking >5 seconds
+{resource.service.name="rippled" && name="consensus.round"} | duration > 5s
+
+# Find failed transactions with error details
+{resource.service.name="rippled" && name="tx.validate" && status.code=error}
+
+# Find transactions relayed to many peers
+{resource.service.name="rippled" && name="tx.relay"} | span.xrpl.tx.relay_count > 10
+
+# Compare latency across nodes
+{resource.service.name="rippled" && name="rpc.command.account_info"} | avg(duration) by (resource.service.instance.id)
+```
+
+### 5.8.6 Correlation with PerfLog
+
+To correlate OpenTelemetry traces with existing PerfLog data:
+
+**Step 1: Configure Loki to ingest PerfLog**
+
+```yaml
+# promtail-config.yaml
+scrape_configs:
+  - job_name: rippled-perflog
+    static_configs:
+      - targets:
+          - localhost
+        labels:
+          job: rippled
+          __path__: /var/log/rippled/perf*.log
+    pipeline_stages:
+      - json:
+          expressions:
+            trace_id: trace_id
+            ledger_seq: ledger_seq
+            tx_hash: tx_hash
+      - labels:
+          trace_id:
+          ledger_seq:
+          tx_hash:
+```
+
+**Step 2: Add trace_id to PerfLog entries**
+
+Modify PerfLog to include trace_id when available:
+
+```cpp
+// In PerfLog output, add trace_id from current span context
+void logPerf(Json::Value& entry) {
+    auto span = opentelemetry::trace::GetSpan(
+        opentelemetry::context::RuntimeContext::GetCurrent());
+    if (span && span->GetContext().IsValid()) {
+        char traceIdHex[33];
+        span->GetContext().trace_id().ToLowerBase16(traceIdHex);
+        entry["trace_id"] = std::string(traceIdHex, 32);
+    }
+    // ... existing logging
+}
+```
+
+**Step 3: Configure Grafana trace-to-logs link**
+
+In Tempo data source configuration, set up the derived field:
+
+```yaml
+jsonData:
+  tracesToLogs:
+    datasourceUid: loki
+    tags: ["trace_id", "xrpl.tx.hash"]
+    filterByTraceID: true
+    filterBySpanID: false
+```
+
+### 5.8.7 Correlation with Insight/OTel System Metrics
+
+To correlate traces with Beast Insight system metrics:
+
+**Step 1: Export Insight metrics to Prometheus**
+
+Beast Insight metrics are exported natively via OTLP to the OTel Collector,
+which exposes them on the Prometheus endpoint alongside spanmetrics. No
+separate StatsD exporter is needed when using `server=otel`.
+
+```ini
+# xrpld.cfg — native OTel metrics (recommended)
+[insight]
+server=otel
+endpoint=http://localhost:4318/v1/metrics
+prefix=rippled
+```
+
+**Step 2: Add exemplars to metrics**
+
+OpenTelemetry SDK automatically adds exemplars (trace IDs) to metrics when using the Prometheus exporter. This links metrics spikes to specific traces.
+
+**Step 3: Configure Grafana metric-to-trace link**
+
+```yaml
+# In Prometheus data source
+jsonData:
+  exemplarTraceIdDestinations:
+    - name: trace_id
+      datasourceUid: tempo
+```
+
+**Step 4: Dashboard panel with exemplars**
+
+```json
+{
+  "title": "RPC Latency with Trace Links",
+  "type": "timeseries",
+  "datasource": "Prometheus",
+  "targets": [
+    {
+      "expr": "histogram_quantile(0.99, rate(rippled_rpc_duration_seconds_bucket[5m]))",
+      "exemplar": true
+    }
+  ]
+}
+```
+
+This allows clicking on metric data points to jump directly to the related trace.
+
+---
+
+_Previous: [Code Samples](./04-code-samples.md)_ | _Next: [Implementation Phases](./06-implementation-phases.md)_ | _Back to: [Overview](./OpenTelemetryPlan.md)_

OpenTelemetryPlan/07-observability-backends.md

@@ -0,0 +1,595 @@
+# Observability Backend Recommendations
+
+> **Parent Document**: [OpenTelemetryPlan.md](./OpenTelemetryPlan.md)
+> **Related**: [Implementation Phases](./06-implementation-phases.md) | [Appendix](./08-appendix.md)
+
+---
+
+## 7.1 Development/Testing Backends
+
+| Backend    | Pros                | Cons              | Use Case          |
+| ---------- | ------------------- | ----------------- | ----------------- |
+| **Jaeger** | Easy setup, good UI | Limited retention | Local dev, CI     |
+| **Zipkin** | Simple, lightweight | Basic features    | Quick prototyping |
+
+### Quick Start with Jaeger
+
+```bash
+# Start Jaeger with OTLP support
+docker run -d --name jaeger \
+  -e COLLECTOR_OTLP_ENABLED=true \
+  -p 16686:16686 \
+  -p 4317:4317 \
+  -p 4318:4318 \
+  jaegertracing/all-in-one:latest
+```
+
+---
+
+## 7.2 Production Backends
+
+| Backend           | Pros                                      | Cons               | Use Case                    |
+| ----------------- | ----------------------------------------- | ------------------ | --------------------------- |
+| **Grafana Tempo** | Cost-effective, Grafana integration       | Newer project      | Most production deployments |
+| **Elastic APM**   | Full observability stack, log correlation | Resource intensive | Existing Elastic users      |
+| **Honeycomb**     | Excellent query, high cardinality         | SaaS cost          | Deep debugging needs        |
+| **Datadog APM**   | Full platform, easy setup                 | SaaS cost          | Enterprise with budget      |
+
+### Backend Selection Flowchart
+
+```mermaid
+flowchart TD
+    start[Select Backend] --> budget{Budget<br/>Constraints?}
+
+    budget -->|Yes| oss[Open Source]
+    budget -->|No| saas{Prefer<br/>SaaS?}
+
+    oss --> existing{Existing<br/>Stack?}
+    existing -->|Grafana| tempo[Grafana Tempo]
+    existing -->|Elastic| elastic[Elastic APM]
+    existing -->|None| tempo
+
+    saas -->|Yes| enterprise{Enterprise<br/>Support?}
+    saas -->|No| oss
+
+    enterprise -->|Yes| datadog[Datadog APM]
+    enterprise -->|No| honeycomb[Honeycomb]
+
+    tempo --> final[Configure Collector]
+    elastic --> final
+    honeycomb --> final
+    datadog --> final
+
+    style start fill:#0f172a,stroke:#020617,color:#fff
+    style budget fill:#334155,stroke:#1e293b,color:#fff
+    style oss fill:#1e293b,stroke:#0f172a,color:#fff
+    style existing fill:#334155,stroke:#1e293b,color:#fff
+    style saas fill:#334155,stroke:#1e293b,color:#fff
+    style enterprise fill:#334155,stroke:#1e293b,color:#fff
+    style final fill:#0f172a,stroke:#020617,color:#fff
+    style tempo fill:#1b5e20,stroke:#0d3d14,color:#fff
+    style elastic fill:#bf360c,stroke:#8c2809,color:#fff
+    style honeycomb fill:#0d47a1,stroke:#082f6a,color:#fff
+    style datadog fill:#4a148c,stroke:#2e0d57,color:#fff
+```
+
+---
+
+## 7.3 Recommended Production Architecture
+
+```mermaid
+flowchart TB
+    subgraph validators["Validator Nodes"]
+        v1[rippled<br/>Validator 1]
+        v2[rippled<br/>Validator 2]
+    end
+
+    subgraph stock["Stock Nodes"]
+        s1[rippled<br/>Stock 1]
+        s2[rippled<br/>Stock 2]
+    end
+
+    subgraph collector["OTel Collector Cluster"]
+        c1[Collector<br/>DC1]
+        c2[Collector<br/>DC2]
+    end
+
+    subgraph backends["Storage Backends"]
+        tempo[(Grafana<br/>Tempo)]
+        elastic[(Elastic<br/>APM)]
+        archive[(S3/GCS<br/>Archive)]
+    end
+
+    subgraph ui["Visualization"]
+        grafana[Grafana<br/>Dashboards]
+    end
+
+    v1 -->|OTLP| c1
+    v2 -->|OTLP| c1
+    s1 -->|OTLP| c2
+    s2 -->|OTLP| c2
+
+    c1 --> tempo
+    c1 --> elastic
+    c2 --> tempo
+    c2 --> archive
+
+    tempo --> grafana
+    elastic --> grafana
+
+    style validators fill:#b71c1c,stroke:#7f1d1d,color:#ffffff
+    style stock fill:#0d47a1,stroke:#082f6a,color:#ffffff
+    style collector fill:#bf360c,stroke:#8c2809,color:#ffffff
+    style backends fill:#1b5e20,stroke:#0d3d14,color:#ffffff
+    style ui fill:#4a148c,stroke:#2e0d57,color:#ffffff
+```
+
+---
+
+## 7.4 Architecture Considerations
+
+### 7.4.1 Collector Placement
+
+| Strategy      | Description          | Pros                     | Cons                    |
+| ------------- | -------------------- | ------------------------ | ----------------------- |
+| **Sidecar**   | Collector per node   | Isolation, simple config | Resource overhead       |
+| **DaemonSet** | Collector per host   | Shared resources         | Complexity              |
+| **Gateway**   | Central collector(s) | Centralized processing   | Single point of failure |
+
+**Recommendation**: Use **Gateway** pattern with regional collectors for rippled networks:
+
+- One collector cluster per datacenter/region
+- Tail-based sampling at collector level
+- Multiple export destinations for redundancy
+
+### 7.4.2 Sampling Strategy
+
+```mermaid
+flowchart LR
+    subgraph head["Head Sampling (Node)"]
+        hs[10% probabilistic]
+    end
+
+    subgraph tail["Tail Sampling (Collector)"]
+        ts1[Keep all errors]
+        ts2[Keep slow >5s]
+        ts3[Keep 10% rest]
+    end
+
+    head --> tail
+
+    ts1 --> final[Final Traces]
+    ts2 --> final
+    ts3 --> final
+
+    style head fill:#0d47a1,stroke:#082f6a,color:#fff
+    style tail fill:#1b5e20,stroke:#0d3d14,color:#fff
+    style hs fill:#0d47a1,stroke:#082f6a,color:#fff
+    style ts1 fill:#1b5e20,stroke:#0d3d14,color:#fff
+    style ts2 fill:#1b5e20,stroke:#0d3d14,color:#fff
+    style ts3 fill:#1b5e20,stroke:#0d3d14,color:#fff
+    style final fill:#bf360c,stroke:#8c2809,color:#fff
+```
+
+### 7.4.3 Data Retention
+
+| Environment | Hot Storage | Warm Storage | Cold Archive |
+| ----------- | ----------- | ------------ | ------------ |
+| Development | 24 hours    | N/A          | N/A          |
+| Staging     | 7 days      | N/A          | N/A          |
+| Production  | 7 days      | 30 days      | many years   |
+
+---
+
+## 7.5 Integration Checklist
+
+- [ ] Choose primary backend (Tempo recommended for cost/features)
+- [ ] Deploy collector cluster with high availability
+- [ ] Configure tail-based sampling for error/latency traces
+- [ ] Set up Grafana dashboards for trace visualization
+- [ ] Configure alerts for trace anomalies
+- [ ] Establish data retention policies
+- [ ] Test trace correlation with logs and metrics
+
+---
+
+## 7.6 Grafana Dashboard Examples
+
+Pre-built dashboards for rippled observability.
+
+### 7.6.1 Consensus Health Dashboard
+
+```json
+{
+  "title": "rippled Consensus Health",
+  "uid": "rippled-consensus-health",
+  "tags": ["rippled", "consensus", "tracing"],
+  "panels": [
+    {
+      "title": "Consensus Round Duration",
+      "type": "timeseries",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\" && name=\"consensus.round\"} | avg(duration) by (resource.service.instance.id)"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ms",
+          "thresholds": {
+            "steps": [
+              { "color": "green", "value": null },
+              { "color": "yellow", "value": 4000 },
+              { "color": "red", "value": 5000 }
+            ]
+          }
+        }
+      },
+      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 0 }
+    },
+    {
+      "title": "Phase Duration Breakdown",
+      "type": "barchart",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\" && name=~\"consensus.phase.*\"} | avg(duration) by (name)"
+        }
+      ],
+      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 0 }
+    },
+    {
+      "title": "Proposers per Round",
+      "type": "stat",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\" && name=\"consensus.round\"} | avg(span.xrpl.consensus.proposers)"
+        }
+      ],
+      "gridPos": { "h": 4, "w": 6, "x": 0, "y": 8 }
+    },
+    {
+      "title": "Recent Slow Rounds (>5s)",
+      "type": "table",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\" && name=\"consensus.round\"} | duration > 5s"
+        }
+      ],
+      "gridPos": { "h": 8, "w": 24, "x": 0, "y": 12 }
+    }
+  ]
+}
+```
+
+### 7.6.2 Node Overview Dashboard
+
+```json
+{
+  "title": "rippled Node Overview",
+  "uid": "rippled-node-overview",
+  "panels": [
+    {
+      "title": "Active Nodes",
+      "type": "stat",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\"} | count_over_time() by (resource.service.instance.id) | count()"
+        }
+      ],
+      "gridPos": { "h": 4, "w": 4, "x": 0, "y": 0 }
+    },
+    {
+      "title": "Total Transactions (1h)",
+      "type": "stat",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\" && name=\"tx.receive\"} | count()"
+        }
+      ],
+      "gridPos": { "h": 4, "w": 4, "x": 4, "y": 0 }
+    },
+    {
+      "title": "Error Rate",
+      "type": "gauge",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\" && status.code=error} | rate() / {resource.service.name=\"rippled\"} | rate() * 100"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "percent",
+          "max": 10,
+          "thresholds": {
+            "steps": [
+              { "color": "green", "value": null },
+              { "color": "yellow", "value": 1 },
+              { "color": "red", "value": 5 }
+            ]
+          }
+        }
+      },
+      "gridPos": { "h": 4, "w": 4, "x": 8, "y": 0 }
+    },
+    {
+      "title": "Service Map",
+      "type": "nodeGraph",
+      "datasource": "Tempo",
+      "gridPos": { "h": 12, "w": 12, "x": 12, "y": 0 }
+    }
+  ]
+}
+```
+
+### 7.6.3 Alert Rules
+
+```yaml
+# grafana/provisioning/alerting/rippled-alerts.yaml
+apiVersion: 1
+
+groups:
+  - name: rippled-tracing-alerts
+    folder: rippled
+    interval: 1m
+    rules:
+      - uid: consensus-slow
+        title: Consensus Round Slow
+        condition: A
+        data:
+          - refId: A
+            datasourceUid: tempo
+            model:
+              queryType: traceql
+              query: '{resource.service.name="rippled" && name="consensus.round"} | avg(duration) > 5s'
+        for: 5m
+        annotations:
+          summary: Consensus rounds taking >5 seconds
+          description: "Consensus duration: {{ $value }}ms"
+        labels:
+          severity: warning
+
+      - uid: rpc-error-spike
+        title: RPC Error Rate Spike
+        condition: B
+        data:
+          - refId: B
+            datasourceUid: tempo
+            model:
+              queryType: traceql
+              query: '{resource.service.name="rippled" && name=~"rpc.command.*" && status.code=error} | rate() > 0.05'
+        for: 2m
+        annotations:
+          summary: RPC error rate >5%
+        labels:
+          severity: critical
+
+      - uid: tx-throughput-drop
+        title: Transaction Throughput Drop
+        condition: C
+        data:
+          - refId: C
+            datasourceUid: tempo
+            model:
+              queryType: traceql
+              query: '{resource.service.name="rippled" && name="tx.receive"} | rate() < 10'
+        for: 10m
+        annotations:
+          summary: Transaction throughput below threshold
+        labels:
+          severity: warning
+```
+
+---
+
+## 7.7 PerfLog and Insight Correlation
+
+How to correlate OpenTelemetry traces with existing rippled observability.
+
+### 7.7.1 Correlation Architecture
+
+```mermaid
+flowchart TB
+    subgraph rippled["rippled Node"]
+        otel[OpenTelemetry<br/>Spans]
+        perflog[PerfLog<br/>JSON Logs]
+        insight[Beast Insight<br/>StatsD Metrics]
+    end
+
+    subgraph collectors["Data Collection"]
+        otelc[OTel Collector]
+        promtail[Promtail/Fluentd]
+        statsd[StatsD Exporter]
+    end
+
+    subgraph storage["Storage"]
+        tempo[(Tempo)]
+        loki[(Loki)]
+        prom[(Prometheus)]
+    end
+
+    subgraph grafana["Grafana"]
+        traces[Trace View]
+        logs[Log View]
+        metrics[Metrics View]
+        corr[Correlation<br/>Panel]
+    end
+
+    otel -->|OTLP| otelc --> tempo
+    perflog -->|JSON| promtail --> loki
+    insight -->|StatsD| statsd --> prom
+
+    tempo --> traces
+    loki --> logs
+    prom --> metrics
+
+    traces --> corr
+    logs --> corr
+    metrics --> corr
+
+    style rippled fill:#0d47a1,stroke:#082f6a,color:#fff
+    style collectors fill:#bf360c,stroke:#8c2809,color:#fff
+    style storage fill:#1b5e20,stroke:#0d3d14,color:#fff
+    style grafana fill:#4a148c,stroke:#2e0d57,color:#fff
+    style otel fill:#0d47a1,stroke:#082f6a,color:#fff
+    style perflog fill:#0d47a1,stroke:#082f6a,color:#fff
+    style insight fill:#0d47a1,stroke:#082f6a,color:#fff
+    style otelc fill:#bf360c,stroke:#8c2809,color:#fff
+    style promtail fill:#bf360c,stroke:#8c2809,color:#fff
+    style statsd fill:#bf360c,stroke:#8c2809,color:#fff
+    style tempo fill:#1b5e20,stroke:#0d3d14,color:#fff
+    style loki fill:#1b5e20,stroke:#0d3d14,color:#fff
+    style prom fill:#1b5e20,stroke:#0d3d14,color:#fff
+    style traces fill:#4a148c,stroke:#2e0d57,color:#fff
+    style logs fill:#4a148c,stroke:#2e0d57,color:#fff
+    style metrics fill:#4a148c,stroke:#2e0d57,color:#fff
+    style corr fill:#4a148c,stroke:#2e0d57,color:#fff
+```
+
+### 7.7.2 Correlation Fields
+
+| Source      | Field                       | Link To       | Purpose                    |
+| ----------- | --------------------------- | ------------- | -------------------------- |
+| **Trace**   | `trace_id`                  | Logs          | Find log entries for trace |
+| **Trace**   | `xrpl.tx.hash`              | Logs, Metrics | Find TX-related data       |
+| **Trace**   | `xrpl.consensus.ledger.seq` | Logs          | Find ledger-related logs   |
+| **PerfLog** | `trace_id` (new)            | Traces        | Jump to trace from log     |
+| **PerfLog** | `ledger_seq`                | Traces        | Find consensus trace       |
+| **Insight** | `exemplar.trace_id`         | Traces        | Jump from metric spike     |
+
+### 7.7.3 Example: Debugging a Slow Transaction
+
+**Step 1: Find the trace**
+
+```
+# In Grafana Explore with Tempo
+{resource.service.name="rippled" && span.xrpl.tx.hash="ABC123..."}
+```
+
+**Step 2: Get the trace_id from the trace view**
+
+```
+Trace ID: 4bf92f3577b34da6a3ce929d0e0e4736
+```
+
+**Step 3: Find related PerfLog entries**
+
+```
+# In Grafana Explore with Loki
+{job="rippled"} |= "4bf92f3577b34da6a3ce929d0e0e4736"
+```
+
+**Step 4: Check Insight metrics for the time window**
+
+```
+# In Grafana with Prometheus
+rate(rippled_tx_applied_total[1m])
+  @ timestamp_from_trace
+```
+
+### 7.7.4 Unified Dashboard Example
+
+```json
+{
+  "title": "rippled Unified Observability",
+  "uid": "rippled-unified",
+  "panels": [
+    {
+      "title": "Transaction Latency (Traces)",
+      "type": "timeseries",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\" && name=\"tx.receive\"} | histogram_over_time(duration)"
+        }
+      ],
+      "gridPos": { "h": 6, "w": 8, "x": 0, "y": 0 }
+    },
+    {
+      "title": "Transaction Rate (Metrics)",
+      "type": "timeseries",
+      "datasource": "Prometheus",
+      "targets": [
+        {
+          "expr": "rate(rippled_tx_received_total[5m])",
+          "legendFormat": "{{ instance }}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "links": [
+            {
+              "title": "View traces",
+              "url": "/explore?left={\"datasource\":\"Tempo\",\"query\":\"{resource.service.name=\\\"rippled\\\" && name=\\\"tx.receive\\\"}\"}"
+            }
+          ]
+        }
+      },
+      "gridPos": { "h": 6, "w": 8, "x": 8, "y": 0 }
+    },
+    {
+      "title": "Recent Logs",
+      "type": "logs",
+      "datasource": "Loki",
+      "targets": [
+        {
+          "expr": "{job=\"rippled\"} | json"
+        }
+      ],
+      "gridPos": { "h": 6, "w": 8, "x": 16, "y": 0 }
+    },
+    {
+      "title": "Trace Search",
+      "type": "table",
+      "datasource": "Tempo",
+      "targets": [
+        {
+          "queryType": "traceql",
+          "query": "{resource.service.name=\"rippled\"}"
+        }
+      ],
+      "fieldConfig": {
+        "overrides": [
+          {
+            "matcher": { "id": "byName", "options": "traceID" },
+            "properties": [
+              {
+                "id": "links",
+                "value": [
+                  {
+                    "title": "View trace",
+                    "url": "/explore?left={\"datasource\":\"Tempo\",\"query\":\"${__value.raw}\"}"
+                  },
+                  {
+                    "title": "View logs",
+                    "url": "/explore?left={\"datasource\":\"Loki\",\"query\":\"{job=\\\"rippled\\\"} |= \\\"${__value.raw}\\\"\"}"
+                  }
+                ]
+              }
+            ]
+          }
+        ]
+      },
+      "gridPos": { "h": 12, "w": 24, "x": 0, "y": 6 }
+    }
+  ]
+}
+```
+
+---
+
+_Previous: [Implementation Phases](./06-implementation-phases.md)_ | _Next: [Appendix](./08-appendix.md)_ | _Back to: [Overview](./OpenTelemetryPlan.md)_

OpenTelemetryPlan/08-appendix.md

@@ -0,0 +1,231 @@
+# Appendix
+
+> **Parent Document**: [OpenTelemetryPlan.md](./OpenTelemetryPlan.md)
+> **Related**: [Observability Backends](./07-observability-backends.md)
+
+---
+
+## 8.1 Glossary
+
+| Term                  | Definition                                                 |
+| --------------------- | ---------------------------------------------------------- |
+| **Span**              | A unit of work with start/end time, name, and attributes   |
+| **Trace**             | A collection of spans representing a complete request flow |
+| **Trace ID**          | 128-bit unique identifier for a trace                      |
+| **Span ID**           | 64-bit unique identifier for a span within a trace         |
+| **Context**           | Carrier for trace/span IDs across boundaries               |
+| **Propagator**        | Component that injects/extracts context                    |
+| **Sampler**           | Decides which traces to record                             |
+| **Exporter**          | Sends spans to backend                                     |
+| **Collector**         | Receives, processes, and forwards telemetry                |
+| **OTLP**              | OpenTelemetry Protocol (wire format)                       |
+| **W3C Trace Context** | Standard HTTP headers for trace propagation                |
+| **Baggage**           | Key-value pairs propagated across service boundaries       |
+| **Resource**          | Entity producing telemetry (service, host, etc.)           |
+| **Instrumentation**   | Code that creates telemetry data                           |
+
+### rippled-Specific Terms
+
+| Term              | Definition                                         |
+| ----------------- | -------------------------------------------------- |
+| **Overlay**       | P2P network layer managing peer connections        |
+| **Consensus**     | XRP Ledger consensus algorithm (RCL)               |
+| **Proposal**      | Validator's suggested transaction set for a ledger |
+| **Validation**    | Validator's signature on a closed ledger           |
+| **HashRouter**    | Component for transaction deduplication            |
+| **JobQueue**      | Thread pool for asynchronous task execution        |
+| **PerfLog**       | Existing performance logging system in rippled     |
+| **Beast Insight** | Existing metrics framework in rippled              |
+
+### Phase 9–11 Terms
+
+| Term                        | Definition                                                                |
+| --------------------------- | ------------------------------------------------------------------------- |
+| **MetricsRegistry**         | Centralized class for OTel async gauge registrations (Phase 9)            |
+| **ObservableGauge**         | OTel Metrics SDK async instrument polled via callback at fixed intervals  |
+| **PeriodicMetricReader**    | OTel SDK component that invokes gauge callbacks at configurable intervals |
+| **CountedObject**           | rippled template that tracks live instance counts via atomic counters     |
+| **TxQ**                     | Transaction queue managing fee escalation and ordering                    |
+| **Load Factor**             | Combined multiplier affecting transaction cost (local, cluster, network)  |
+| **OTel Collector Receiver** | Custom Go plugin that polls rippled RPC and emits OTel metrics (Phase 11) |
+
+---
+
+## 8.2 Span Hierarchy Visualization
+
+```mermaid
+flowchart TB
+    subgraph trace["Trace: Transaction Lifecycle"]
+        rpc["rpc.submit<br/>(entry point)"]
+        validate["tx.validate"]
+        relay["tx.relay<br/>(parent span)"]
+
+        subgraph peers["Peer Spans"]
+            p1["peer.send<br/>Peer A"]
+            p2["peer.send<br/>Peer B"]
+            p3["peer.send<br/>Peer C"]
+        end
+
+        consensus["consensus.round"]
+        apply["tx.apply"]
+    end
+
+    rpc --> validate
+    validate --> relay
+    relay --> p1
+    relay --> p2
+    relay --> p3
+    p1 -.->|"context propagation"| consensus
+    consensus --> apply
+
+    style trace fill:#0f172a,stroke:#020617,color:#fff
+    style peers fill:#1e3a8a,stroke:#172554,color:#fff
+    style rpc fill:#1d4ed8,stroke:#1e40af,color:#fff
+    style validate fill:#047857,stroke:#064e3b,color:#fff
+    style relay fill:#047857,stroke:#064e3b,color:#fff
+    style p1 fill:#0e7490,stroke:#155e75,color:#fff
+    style p2 fill:#0e7490,stroke:#155e75,color:#fff
+    style p3 fill:#0e7490,stroke:#155e75,color:#fff
+    style consensus fill:#fef3c7,stroke:#fde68a,color:#1e293b
+    style apply fill:#047857,stroke:#064e3b,color:#fff
+```
+
+---
+
+## 8.3 References
+
+### OpenTelemetry Resources
+
+1. [OpenTelemetry C++ SDK](https://github.com/open-telemetry/opentelemetry-cpp)
+2. [OpenTelemetry Specification](https://opentelemetry.io/docs/specs/otel/)
+3. [OpenTelemetry Collector](https://opentelemetry.io/docs/collector/)
+4. [OTLP Protocol Specification](https://opentelemetry.io/docs/specs/otlp/)
+
+### Standards
+
+5. [W3C Trace Context](https://www.w3.org/TR/trace-context/)
+6. [W3C Baggage](https://www.w3.org/TR/baggage/)
+7. [Protocol Buffers](https://protobuf.dev/)
+
+### rippled Resources
+
+8. [rippled Source Code](https://github.com/XRPLF/rippled)
+9. [XRP Ledger Documentation](https://xrpl.org/docs/)
+10. [rippled Overlay README](https://github.com/XRPLF/rippled/blob/develop/src/xrpld/overlay/README.md)
+11. [rippled RPC README](https://github.com/XRPLF/rippled/blob/develop/src/xrpld/rpc/README.md)
+12. [rippled Consensus README](https://github.com/XRPLF/rippled/blob/develop/src/xrpld/app/consensus/README.md)
+
+---
+
+## 8.4 Version History
+
+| Version | Date       | Author | Changes                                      |
+| ------- | ---------- | ------ | -------------------------------------------- |
+| 1.0     | 2026-02-12 | -      | Initial implementation plan                  |
+| 1.1     | 2026-02-13 | -      | Refactored into modular documents            |
+| 1.2     | 2026-03-09 | -      | Added Phases 9–11 (future enhancement plans) |
+
+---
+
+## 8.5 Document Index
+
+### Plan Documents
+
+| Document                                                             | Description                                  |
+| -------------------------------------------------------------------- | -------------------------------------------- |
+| [OpenTelemetryPlan.md](./OpenTelemetryPlan.md)                       | Master overview and executive summary        |
+| [00-tracing-fundamentals.md](./00-tracing-fundamentals.md)           | Distributed tracing concepts and OTel primer |
+| [01-architecture-analysis.md](./01-architecture-analysis.md)         | rippled architecture and trace points        |
+| [02-design-decisions.md](./02-design-decisions.md)                   | SDK selection, exporters, span conventions   |
+| [03-implementation-strategy.md](./03-implementation-strategy.md)     | Directory structure, performance analysis    |
+| [04-code-samples.md](./04-code-samples.md)                           | C++ code examples for all components         |
+| [05-configuration-reference.md](./05-configuration-reference.md)     | rippled config, CMake, Collector configs     |
+| [06-implementation-phases.md](./06-implementation-phases.md)         | Timeline, tasks, risks, success metrics      |
+| [07-observability-backends.md](./07-observability-backends.md)       | Backend selection and architecture           |
+| [08-appendix.md](./08-appendix.md)                                   | Glossary, references, version history        |
+| [09-data-collection-reference.md](./09-data-collection-reference.md) | Span/metric/dashboard inventory              |
+| [presentation.md](./presentation.md)                                 | Slide deck for OTel plan overview            |
+
+### Task Lists
+
+| Document                                                                   | Description                                         |
+| -------------------------------------------------------------------------- | --------------------------------------------------- |
+| [POC_taskList.md](./POC_taskList.md)                                       | Proof-of-concept telemetry integration              |
+| [Phase2_taskList.md](./Phase2_taskList.md)                                 | RPC layer trace instrumentation                     |
+| [Phase3_taskList.md](./Phase3_taskList.md)                                 | Peer overlay & consensus tracing                    |
+| [Phase4_taskList.md](./Phase4_taskList.md)                                 | Transaction lifecycle tracing                       |
+| [Phase5_taskList.md](./Phase5_taskList.md)                                 | Ledger processing & advanced tracing                |
+| [Phase5_IntegrationTest_taskList.md](./Phase5_IntegrationTest_taskList.md) | Observability stack integration tests               |
+| [Phase7_taskList.md](./Phase7_taskList.md)                                 | Native OTel metrics migration                       |
+| [Phase8_taskList.md](./Phase8_taskList.md)                                 | Log-trace correlation                               |
+| [Phase9_taskList.md](./Phase9_taskList.md)                                 | Internal metric instrumentation gap fill (future)   |
+| [Phase10_taskList.md](./Phase10_taskList.md)                               | Synthetic workload generation & validation (future) |
+| [Phase11_taskList.md](./Phase11_taskList.md)                               | Third-party data collection pipelines (future)      |
+
+> **Note**: Phases 1 and 6 do not have separate task list files. Phase 1 tasks are documented in [06-implementation-phases.md §6.2](./06-implementation-phases.md). Phase 6 tasks are documented in [06-implementation-phases.md §6.7](./06-implementation-phases.md).
+
+---
+
+## 8.6 Phase 9–11 Cross-Reference Guide
+
+This guide maps Phase 9–11 content to its location across the documentation.
+
+### Phase 9: Internal Metric Instrumentation Gap Fill
+
+| Content                         | Location                                                                 |
+| ------------------------------- | ------------------------------------------------------------------------ |
+| Plan & architecture             | [06-implementation-phases.md §6.8.2](./06-implementation-phases.md)      |
+| Task list (10 tasks, 12d)       | [Phase9_taskList.md](./Phase9_taskList.md)                               |
+| Future metric definitions (~50) | [09-data-collection-reference.md §5b](./09-data-collection-reference.md) |
+| New class: `MetricsRegistry`    | `src/xrpld/telemetry/MetricsRegistry.h/.cpp` (planned)                   |
+| New dashboards                  | `rippled-fee-market`, `rippled-job-queue` (planned)                      |
+
+**Metric categories**: NodeStore I/O, Cache Hit Rates, TxQ, PerfLog Per-RPC, PerfLog Per-Job, Counted Objects, Fee Escalation & Load Factors.
+
+### Phase 10: Synthetic Workload Generation & Telemetry Validation
+
+| Content                  | Location                                                                 |
+| ------------------------ | ------------------------------------------------------------------------ |
+| Plan & architecture      | [06-implementation-phases.md §6.8.3](./06-implementation-phases.md)      |
+| Task list (7 tasks, 10d) | [Phase10_taskList.md](./Phase10_taskList.md)                             |
+| Validation inventory     | [09-data-collection-reference.md §5c](./09-data-collection-reference.md) |
+| Test harness             | `docker/telemetry/docker-compose.workload.yaml` (planned)                |
+| CI workflow              | `.github/workflows/telemetry-validation.yml` (planned)                   |
+
+**Validates**: 16 spans, 22 attributes, 300+ metrics, 10 dashboards, log-trace correlation.
+
+### Phase 11: Third-Party Data Collection Pipelines
+
+| Content                           | Location                                                                 |
+| --------------------------------- | ------------------------------------------------------------------------ |
+| Plan & architecture               | [06-implementation-phases.md §6.8.4](./06-implementation-phases.md)      |
+| Task list (11 tasks, 15d)         | [Phase11_taskList.md](./Phase11_taskList.md)                             |
+| External metric definitions (~30) | [09-data-collection-reference.md §5d](./09-data-collection-reference.md) |
+| Custom OTel Collector receiver    | `docker/telemetry/otel-rippled-receiver/` (planned)                      |
+| Prometheus alerting rules (11)    | [09-data-collection-reference.md §5d](./09-data-collection-reference.md) |
+| New dashboards (4)                | Validator Health, Network Topology, Fee Market (External), DEX & AMM     |
+
+**Consumer categories**: Exchanges, Payment Processors, DeFi/AMM, NFT Marketplaces, Analytics Providers, Wallets, Compliance, Academic Researchers, Institutional Custody, CBDC Bridge Operators.
+
+---
+
+## 8.7 Effort Summary (All Phases)
+
+| Phase | Description                      | Effort     | Status             |
+| ----- | -------------------------------- | ---------- | ------------------ |
+| 1     | Core SDK integration             | 5d         | Active             |
+| 2     | RPC tracing                      | 5d         | Active             |
+| 3     | Peer & consensus tracing         | 8d         | Active             |
+| 4     | Transaction lifecycle            | 7d         | Active             |
+| 5     | Ledger & advanced                | 7.1d       | Active             |
+| 6     | StatsD → OTel bridge             | 8d         | Active             |
+| 7     | Native OTel metrics              | 15d        | Active             |
+| 8     | Log-trace correlation            | 10d        | Active             |
+| 9     | Internal metric gap fill         | 12d        | Future Enhancement |
+| 10    | Workload generation & validation | 10d        | Future Enhancement |
+| 11    | Third-party data pipelines       | 15d        | Future Enhancement |
+|       | **Total**                        | **102.1d** |                    |
+
+---
+
+_Previous: [Observability Backends](./07-observability-backends.md)_ | _Back to: [Overview](./OpenTelemetryPlan.md)_

OpenTelemetryPlan/09-data-collection-reference.md

@@ -0,0 +1,992 @@
+# Observability Data Collection Reference
+
+> **Audience**: Developers and operators. This is the single source of truth for all telemetry data collected by rippled's observability stack.
+>
+> **Related docs**: [docs/telemetry-runbook.md](../docs/telemetry-runbook.md) (operator runbook with alerting and troubleshooting) | [03-implementation-strategy.md](./03-implementation-strategy.md) (code structure and performance optimization) | [04-code-samples.md](./04-code-samples.md) (C++ instrumentation examples)
+
+## Data Flow Overview
+
+```mermaid
+graph LR
+    subgraph rippledNode["rippled Node"]
+        A["Trace Macros<br/>XRPL_TRACE_SPAN<br/>(OTLP/HTTP exporter)"]
+        B["beast::insight<br/>OTel native metrics<br/>(OTLP/HTTP exporter)"]
+        C["MetricsRegistry<br/>OTel SDK metrics<br/>(OTLP/HTTP exporter)"]
+    end
+
+    subgraph collector["OTel Collector  :4317 / :4318"]
+        direction TB
+        R1["OTLP Receiver<br/>:4317 gRPC  |  :4318 HTTP<br/>(traces + metrics)"]
+        BP["Batch Processor<br/>timeout 1s, batch 100"]
+        SM["SpanMetrics Connector<br/>derives RED metrics<br/>from trace spans"]
+
+        R1 --> BP
+        BP --> SM
+    end
+
+    subgraph backends["Trace Backends  (choose one or both)"]
+        D["Jaeger  :16686<br/>Trace search &<br/>visualization"]
+        T["Grafana Tempo<br/>(preferred for production)<br/>S3/GCS long-term storage"]
+    end
+
+    subgraph metrics["Metrics Stack"]
+        E["Prometheus  :9090<br/>scrapes :8889<br/>span-derived + system metrics"]
+    end
+
+    subgraph viz["Visualization"]
+        F["Grafana  :3000<br/>13 dashboards"]
+    end
+
+    A -->|"OTLP/HTTP :4318<br/>(traces + attributes)"| R1
+    B -->|"OTLP/HTTP :4318<br/>(gauges, counters, histograms)"| R1
+    C -->|"OTLP/HTTP :4318<br/>(counters, histograms,<br/>observable gauges)"| R1
+
+    BP -->|"OTLP/gRPC :4317"| D
+    BP -->|"OTLP/gRPC"| T
+
+    SM -->|"span_calls_total<br/>span_duration_ms<br/>(6 dimension labels)"| E
+    R1 -->|"rippled_* gauges<br/>rippled_* counters<br/>rippled_* histograms"| E
+
+    E -->|"Prometheus<br/>data source"| F
+    D -->|"Jaeger<br/>data source"| F
+    T -->|"Tempo<br/>data source"| F
+
+    style A fill:#4a90d9,color:#fff,stroke:#2a6db5
+    style B fill:#4a90d9,color:#fff,stroke:#2a6db5
+    style R1 fill:#5cb85c,color:#fff,stroke:#3d8b3d
+    style BP fill:#449d44,color:#fff,stroke:#2d6e2d
+    style SM fill:#449d44,color:#fff,stroke:#2d6e2d
+    style D fill:#f0ad4e,color:#000,stroke:#c78c2e
+    style T fill:#e8953a,color:#000,stroke:#b5732a
+    style E fill:#f0ad4e,color:#000,stroke:#c78c2e
+    style F fill:#5bc0de,color:#000,stroke:#3aa8c1
+    style rippledNode fill:#1a2633,color:#ccc,stroke:#4a90d9
+    style collector fill:#1a3320,color:#ccc,stroke:#5cb85c
+    style backends fill:#332a1a,color:#ccc,stroke:#f0ad4e
+    style metrics fill:#332a1a,color:#ccc,stroke:#f0ad4e
+    style viz fill:#1a2d33,color:#ccc,stroke:#5bc0de
+```
+
+There are two independent telemetry pipelines entering a single **OTel Collector** via the same OTLP receiver:
+
+1. **OpenTelemetry Traces** — Distributed spans with attributes, exported via OTLP/HTTP (:4318) to the collector's **OTLP Receiver**. The **Batch Processor** groups spans (1s timeout, batch size 100) before forwarding to trace backends. The **SpanMetrics Connector** derives RED metrics (rate, errors, duration) from every span and feeds them into the metrics pipeline.
+2. **beast::insight OTel Metrics** — System-level gauges, counters, and histograms exported natively via OTLP/HTTP (:4318) to the same **OTLP Receiver**. These are batched and exported to Prometheus alongside span-derived metrics. The StatsD UDP transport has been replaced by native OTLP; `server=statsd` remains available as a fallback.
+
+**Trace backends** — The collector exports traces via OTLP/gRPC to one or both:
+
+- **Jaeger** (development) — Provides trace search UI at `:16686`. Easy single-binary setup.
+- **Grafana Tempo** (production) — Preferred for production. Supports S3/GCS object storage for cost-effective long-term trace retention and integrates natively with Grafana.
+
+> **Further reading**: [00-tracing-fundamentals.md](./00-tracing-fundamentals.md) for core OpenTelemetry concepts (traces, spans, context propagation, sampling). [07-observability-backends.md](./07-observability-backends.md) for production backend selection, collector placement, and sampling strategies.
+
+---
+
+## 1. OpenTelemetry Spans
+
+### 1.1 Complete Span Inventory (16 spans)
+
+> **See also**: [02-design-decisions.md §2.3](./02-design-decisions.md#23-span-naming-conventions) for naming conventions and the full span catalog with rationale. [04-code-samples.md §4.6](./04-code-samples.md#46-span-flow-visualization) for span flow diagrams.
+
+#### RPC Spans
+
+Controlled by `trace_rpc=1` in `[telemetry]` config.
+
+| Span Name            | Parent        | Source File       | Description                                                              |
+| -------------------- | ------------- | ----------------- | ------------------------------------------------------------------------ |
+| `rpc.request`        | —             | ServerHandler.cpp | Top-level HTTP RPC request entry point                                   |
+| `rpc.process`        | `rpc.request` | ServerHandler.cpp | RPC processing pipeline                                                  |
+| `rpc.ws_message`     | —             | ServerHandler.cpp | WebSocket message handling                                               |
+| `rpc.command.<name>` | `rpc.process` | RPCHandler.cpp    | Per-command span (e.g., `rpc.command.server_info`, `rpc.command.ledger`) |
+
+**Where to find**: Jaeger → Service: `rippled` → Operation: `rpc.request` or `rpc.command.*`
+
+**Grafana dashboard**: _RPC Performance_ (`rippled-rpc-perf`)
+
+#### Transaction Spans
+
+Controlled by `trace_transactions=1` in `[telemetry]` config.
+
+| Span Name    | Parent         | Source File     | Description                                                       |
+| ------------ | -------------- | --------------- | ----------------------------------------------------------------- |
+| `tx.process` | —              | NetworkOPs.cpp  | Transaction submission entry point (local or peer-relayed)        |
+| `tx.receive` | —              | PeerImp.cpp     | Raw transaction received from peer overlay (before deduplication) |
+| `tx.apply`   | `ledger.build` | BuildLedger.cpp | Transaction set applied to new ledger during consensus            |
+
+**Where to find**: Jaeger → Operation: `tx.process` or `tx.receive`
+
+**Grafana dashboard**: _Transaction Overview_ (`rippled-transactions`)
+
+#### Consensus Spans
+
+Controlled by `trace_consensus=1` in `[telemetry]` config.
+
+| Span Name                   | Parent | Source File      | Description                                   |
+| --------------------------- | ------ | ---------------- | --------------------------------------------- |
+| `consensus.proposal.send`   | —      | RCLConsensus.cpp | Node broadcasts its transaction set proposal  |
+| `consensus.ledger_close`    | —      | RCLConsensus.cpp | Ledger close event triggered by consensus     |
+| `consensus.accept`          | —      | RCLConsensus.cpp | Consensus accepts a ledger (round complete)   |
+| `consensus.validation.send` | —      | RCLConsensus.cpp | Validation message sent after ledger accepted |
+| `consensus.accept.apply`    | —      | RCLConsensus.cpp | Ledger application with close time details    |
+
+**Where to find**: Jaeger → Operation: `consensus.*`
+
+**Grafana dashboard**: _Consensus Health_ (`rippled-consensus`)
+
+#### Ledger Spans
+
+Controlled by `trace_ledger=1` in `[telemetry]` config.
+
+| Span Name         | Parent | Source File      | Description                                    |
+| ----------------- | ------ | ---------------- | ---------------------------------------------- |
+| `ledger.build`    | —      | BuildLedger.cpp  | Build new ledger from accepted transaction set |
+| `ledger.validate` | —      | LedgerMaster.cpp | Ledger promoted to validated status            |
+| `ledger.store`    | —      | LedgerMaster.cpp | Ledger stored to database/history              |
+
+**Where to find**: Jaeger → Operation: `ledger.*`
+
+**Grafana dashboard**: _Ledger Operations_ (`rippled-ledger-ops`)
+
+#### Peer Spans
+
+Controlled by `trace_peer=1` in `[telemetry]` config. **Disabled by default** (high volume).
+
+| Span Name                 | Parent | Source File | Description                           |
+| ------------------------- | ------ | ----------- | ------------------------------------- |
+| `peer.proposal.receive`   | —      | PeerImp.cpp | Consensus proposal received from peer |
+| `peer.validation.receive` | —      | PeerImp.cpp | Validation message received from peer |
+
+**Where to find**: Jaeger → Operation: `peer.*`
+
+**Grafana dashboard**: _Peer Network_ (`rippled-peer-net`)
+
+---
+
+### 1.2 Complete Attribute Inventory (22 attributes)
+
+> **See also**: [02-design-decisions.md §2.4.2](./02-design-decisions.md#242-span-attributes-by-category) for attribute design rationale and privacy considerations.
+
+Every span can carry key-value attributes that provide context for filtering and aggregation.
+
+#### RPC Attributes
+
+| Attribute                | Type   | Set On          | Description                                      |
+| ------------------------ | ------ | --------------- | ------------------------------------------------ |
+| `xrpl.rpc.command`       | string | `rpc.command.*` | RPC command name (e.g., `server_info`, `ledger`) |
+| `xrpl.rpc.version`       | int64  | `rpc.command.*` | API version number                               |
+| `xrpl.rpc.role`          | string | `rpc.command.*` | Caller role: `"admin"` or `"user"`               |
+| `xrpl.rpc.status`        | string | `rpc.command.*` | Result: `"success"` or `"error"`                 |
+| `xrpl.rpc.duration_ms`   | int64  | `rpc.command.*` | Command execution time in milliseconds           |
+| `xrpl.rpc.error_message` | string | `rpc.command.*` | Error details (only set on failure)              |
+
+**Jaeger query**: Tag `xrpl.rpc.command=server_info` to find all `server_info` calls.
+
+**Prometheus label**: `xrpl_rpc_command` (dots converted to underscores by SpanMetrics).
+
+#### Transaction Attributes
+
+| Attribute            | Type    | Set On                     | Description                                          |
+| -------------------- | ------- | -------------------------- | ---------------------------------------------------- |
+| `xrpl.tx.hash`       | string  | `tx.process`, `tx.receive` | Transaction hash (hex-encoded)                       |
+| `xrpl.tx.local`      | boolean | `tx.process`               | `true` if locally submitted, `false` if peer-relayed |
+| `xrpl.tx.path`       | string  | `tx.process`               | Submission path: `"sync"` or `"async"`               |
+| `xrpl.tx.suppressed` | boolean | `tx.receive`               | `true` if transaction was suppressed (duplicate)     |
+| `xrpl.tx.status`     | string  | `tx.receive`               | Transaction status (e.g., `"known_bad"`)             |
+
+**Jaeger query**: Tag `xrpl.tx.hash=<hash>` to trace a specific transaction across nodes.
+
+**Prometheus label**: `xrpl_tx_local` (used as SpanMetrics dimension).
+
+#### Consensus Attributes
+
+| Attribute                            | Type    | Set On                                                                                              | Description                                                   |
+| ------------------------------------ | ------- | --------------------------------------------------------------------------------------------------- | ------------------------------------------------------------- |
+| `xrpl.consensus.round`               | int64   | `consensus.proposal.send`                                                                           | Consensus round number                                        |
+| `xrpl.consensus.mode`                | string  | `consensus.proposal.send`, `consensus.ledger_close`                                                 | Node mode: `"syncing"`, `"tracking"`, `"full"`, `"proposing"` |
+| `xrpl.consensus.proposers`           | int64   | `consensus.proposal.send`, `consensus.accept`                                                       | Number of proposers in the round                              |
+| `xrpl.consensus.proposing`           | boolean | `consensus.validation.send`                                                                         | Whether this node was a proposer                              |
+| `xrpl.consensus.ledger.seq`          | int64   | `consensus.ledger_close`, `consensus.accept`, `consensus.validation.send`, `consensus.accept.apply` | Ledger sequence number                                        |
+| `xrpl.consensus.close_time`          | int64   | `consensus.accept.apply`                                                                            | Agreed-upon ledger close time (epoch seconds)                 |
+| `xrpl.consensus.close_time_correct`  | boolean | `consensus.accept.apply`                                                                            | Whether validators reached agreement on close time            |
+| `xrpl.consensus.close_resolution_ms` | int64   | `consensus.accept.apply`                                                                            | Close time rounding granularity in milliseconds               |
+| `xrpl.consensus.state`               | string  | `consensus.accept.apply`                                                                            | Consensus outcome: `"finished"` or `"moved_on"`               |
+| `xrpl.consensus.round_time_ms`       | int64   | `consensus.accept.apply`                                                                            | Total consensus round duration in milliseconds                |
+
+**Jaeger query**: Tag `xrpl.consensus.mode=proposing` to find rounds where node was proposing.
+
+**Prometheus label**: `xrpl_consensus_mode` (used as SpanMetrics dimension).
+
+#### Ledger Attributes
+
+| Attribute                 | Type  | Set On                                                        | Description                                    |
+| ------------------------- | ----- | ------------------------------------------------------------- | ---------------------------------------------- |
+| `xrpl.ledger.seq`         | int64 | `ledger.build`, `ledger.validate`, `ledger.store`, `tx.apply` | Ledger sequence number                         |
+| `xrpl.ledger.validations` | int64 | `ledger.validate`                                             | Number of validations received for this ledger |
+| `xrpl.ledger.tx_count`    | int64 | `ledger.build`, `tx.apply`                                    | Transactions in the ledger                     |
+| `xrpl.ledger.tx_failed`   | int64 | `ledger.build`, `tx.apply`                                    | Failed transactions in the ledger              |
+
+**Jaeger query**: Tag `xrpl.ledger.seq=12345` to find all spans for a specific ledger.
+
+#### Peer Attributes
+
+| Attribute                      | Type    | Set On                                                           | Description                                          |
+| ------------------------------ | ------- | ---------------------------------------------------------------- | ---------------------------------------------------- |
+| `xrpl.peer.id`                 | int64   | `tx.receive`, `peer.proposal.receive`, `peer.validation.receive` | Peer identifier                                      |
+| `xrpl.peer.proposal.trusted`   | boolean | `peer.proposal.receive`                                          | Whether the proposal came from a trusted validator   |
+| `xrpl.peer.validation.trusted` | boolean | `peer.validation.receive`                                        | Whether the validation came from a trusted validator |
+
+**Prometheus labels**: `xrpl_peer_proposal_trusted`, `xrpl_peer_validation_trusted` (SpanMetrics dimensions).
+
+---
+
+### 1.3 SpanMetrics — Derived Prometheus Metrics
+
+> **See also**: [01-architecture-analysis.md](./01-architecture-analysis.md) §1.8.2 for how span-derived metrics map to operational insights.
+
+The OTel Collector's SpanMetrics connector automatically generates RED (Rate, Errors, Duration) metrics from every span. No custom metrics code in rippled is needed.
+
+| Prometheus Metric                                  | Type      | Description                                                                    |
+| -------------------------------------------------- | --------- | ------------------------------------------------------------------------------ |
+| `traces_span_metrics_calls_total`                  | Counter   | Total span invocations                                                         |
+| `traces_span_metrics_duration_milliseconds_bucket` | Histogram | Latency distribution (buckets: 1, 5, 10, 25, 50, 100, 250, 500, 1000, 5000 ms) |
+| `traces_span_metrics_duration_milliseconds_count`  | Histogram | Observation count                                                              |
+| `traces_span_metrics_duration_milliseconds_sum`    | Histogram | Cumulative latency                                                             |
+
+**Standard labels on every metric**: `span_name`, `status_code`, `service_name`, `span_kind`
+
+**Additional dimension labels** (configured in `otel-collector-config.yaml`):
+
+| Span Attribute                 | Prometheus Label               | Applies To                |
+| ------------------------------ | ------------------------------ | ------------------------- |
+| `xrpl.rpc.command`             | `xrpl_rpc_command`             | `rpc.command.*`           |
+| `xrpl.rpc.status`              | `xrpl_rpc_status`              | `rpc.command.*`           |
+| `xrpl.consensus.mode`          | `xrpl_consensus_mode`          | `consensus.ledger_close`  |
+| `xrpl.tx.local`                | `xrpl_tx_local`                | `tx.process`              |
+| `xrpl.peer.proposal.trusted`   | `xrpl_peer_proposal_trusted`   | `peer.proposal.receive`   |
+| `xrpl.peer.validation.trusted` | `xrpl_peer_validation_trusted` | `peer.validation.receive` |
+
+**Where to query**: Prometheus → `traces_span_metrics_calls_total{span_name="rpc.command.server_info"}`
+
+---
+
+## 2. System Metrics (beast::insight — OTel native)
+
+> **See also**: [02-design-decisions.md](./02-design-decisions.md) for the beast::insight coexistence design. [06-implementation-phases.md](./06-implementation-phases.md) for the Phase 6/7 metric inventory.
+>
+> **Migration complete**: Phase 7 replaced the StatsD UDP transport with native OTel Metrics SDK export via OTLP/HTTP. The `beast::insight::Collector` interface and all metric names are preserved — only the wire protocol changed. `[insight] server=statsd` remains as a fallback.
+
+These are system-level metrics emitted by rippled's `beast::insight` framework via OTel OTLP/HTTP. They cover operational data that doesn't map to individual trace spans.
+
+### Configuration
+
+```ini
+# Recommended: native OTel metrics via OTLP/HTTP
+[insight]
+server=otel
+endpoint=http://localhost:4318/v1/metrics
+prefix=rippled
+```
+
+Fallback (StatsD):
+
+```ini
+[insight]
+server=statsd
+address=127.0.0.1:8125
+prefix=rippled
+```
+
+### 2.1 Gauges
+
+| Prometheus Metric                                   | Source File           | Description                              | Typical Range                   |
+| --------------------------------------------------- | --------------------- | ---------------------------------------- | ------------------------------- |
+| `rippled_LedgerMaster_Validated_Ledger_Age`         | LedgerMaster.h        | Seconds since last validated ledger      | 0–10 (healthy), >30 (stale)     |
+| `rippled_LedgerMaster_Published_Ledger_Age`         | LedgerMaster.h        | Seconds since last published ledger      | 0–10 (healthy)                  |
+| `rippled_State_Accounting_Disconnected_duration`    | NetworkOPs.cpp        | Cumulative seconds in Disconnected state | Monotonic                       |
+| `rippled_State_Accounting_Connected_duration`       | NetworkOPs.cpp        | Cumulative seconds in Connected state    | Monotonic                       |
+| `rippled_State_Accounting_Syncing_duration`         | NetworkOPs.cpp        | Cumulative seconds in Syncing state      | Monotonic                       |
+| `rippled_State_Accounting_Tracking_duration`        | NetworkOPs.cpp        | Cumulative seconds in Tracking state     | Monotonic                       |
+| `rippled_State_Accounting_Full_duration`            | NetworkOPs.cpp        | Cumulative seconds in Full state         | Monotonic (should dominate)     |
+| `rippled_State_Accounting_Disconnected_transitions` | NetworkOPs.cpp        | Count of transitions to Disconnected     | Low                             |
+| `rippled_State_Accounting_Connected_transitions`    | NetworkOPs.cpp        | Count of transitions to Connected        | Low                             |
+| `rippled_State_Accounting_Syncing_transitions`      | NetworkOPs.cpp        | Count of transitions to Syncing          | Low                             |
+| `rippled_State_Accounting_Tracking_transitions`     | NetworkOPs.cpp        | Count of transitions to Tracking         | Low                             |
+| `rippled_State_Accounting_Full_transitions`         | NetworkOPs.cpp        | Count of transitions to Full             | Low (should be 1 after startup) |
+| `rippled_Peer_Finder_Active_Inbound_Peers`          | PeerfinderManager.cpp | Active inbound peer connections          | 0–85                            |
+| `rippled_Peer_Finder_Active_Outbound_Peers`         | PeerfinderManager.cpp | Active outbound peer connections         | 10–21                           |
+| `rippled_Overlay_Peer_Disconnects`                  | OverlayImpl.cpp       | Cumulative peer disconnection count      | Low growth                      |
+| `rippled_job_count`                                 | JobQueue.cpp          | Current job queue depth                  | 0–100 (healthy)                 |
+
+**Grafana dashboard**: _Node Health (System Metrics)_ (`rippled-system-node-health`)
+
+### 2.2 Counters
+
+| Prometheus Metric                 | Source File        | Description                                   |
+| --------------------------------- | ------------------ | --------------------------------------------- |
+| `rippled_rpc_requests`            | ServerHandler.cpp  | Total RPC requests received                   |
+| `rippled_ledger_fetches`          | InboundLedgers.cpp | Inbound ledger fetch attempts                 |
+| `rippled_ledger_history_mismatch` | LedgerHistory.cpp  | Ledger hash mismatches detected               |
+| `rippled_warn`                    | Logic.h            | Resource manager warnings issued              |
+| `rippled_drop`                    | Logic.h            | Resource manager drops (connections rejected) |
+
+**Note**: With `server=otel`, `rippled_warn` and `rippled_drop` are properly exported as OTel Counter instruments. The previous StatsD `|m` type limitation no longer applies.
+
+**Grafana dashboard**: _RPC & Pathfinding (System Metrics)_ (`rippled-system-rpc`)
+
+### 2.3 Histograms (Event timers)
+
+| Prometheus Metric       | Source File       | Unit  | Description                    |
+| ----------------------- | ----------------- | ----- | ------------------------------ |
+| `rippled_rpc_time`      | ServerHandler.cpp | ms    | RPC response time distribution |
+| `rippled_rpc_size`      | ServerHandler.cpp | bytes | RPC response size distribution |
+| `rippled_ios_latency`   | Application.cpp   | ms    | I/O service loop latency       |
+| `rippled_pathfind_fast` | PathRequests.h    | ms    | Fast pathfinding duration      |
+| `rippled_pathfind_full` | PathRequests.h    | ms    | Full pathfinding duration      |
+
+Quantiles collected: 0th, 50th, 90th, 95th, 99th, 100th percentile.
+
+**Grafana dashboards**: _Node Health_ (`ios_latency`), _RPC & Pathfinding_ (`rpc_time`, `rpc_size`, `pathfind_*`)
+
+### 2.4 Overlay Traffic Metrics
+
+For each of the 45+ overlay traffic categories (defined in `TrafficCount.h`), four gauges are emitted:
+
+- `rippled_{category}_Bytes_In`
+- `rippled_{category}_Bytes_Out`
+- `rippled_{category}_Messages_In`
+- `rippled_{category}_Messages_Out`
+
+**Key categories**:
+
+| Category                                                          | Description                |
+| ----------------------------------------------------------------- | -------------------------- |
+| `total`                                                           | All traffic aggregated     |
+| `overhead` / `overhead_overlay`                                   | Protocol overhead          |
+| `transactions` / `transactions_duplicate`                         | Transaction relay          |
+| `proposals` / `proposals_untrusted` / `proposals_duplicate`       | Consensus proposals        |
+| `validations` / `validations_untrusted` / `validations_duplicate` | Consensus validations      |
+| `ledger_data_get` / `ledger_data_share`                           | Ledger data exchange       |
+| `ledger_data_Transaction_Node_get/share`                          | Transaction node data      |
+| `ledger_data_Account_State_Node_get/share`                        | Account state node data    |
+| `ledger_data_Transaction_Set_candidate_get/share`                 | Transaction set candidates |
+| `getObject` / `haveTxSet` / `ledgerData`                          | Object requests            |
+| `ping` / `status`                                                 | Keepalive and status       |
+| `set_get`                                                         | Set requests               |
+
+**Grafana dashboards**: _Network Traffic_ (`rippled-system-network`), _Overlay Traffic Detail_ (`rippled-system-overlay-detail`), _Ledger Data & Sync_ (`rippled-system-ledger-sync`)
+
+---
+
+## 3. Grafana Dashboard Reference
+
+> **See also**: [05-configuration-reference.md](./05-configuration-reference.md) §5.8 for Grafana data source provisioning (Tempo, Jaeger, Prometheus) and TraceQL query examples.
+
+### 3.1 Span-Derived Dashboards (5)
+
+| Dashboard            | UID                    | Data Source              | Key Panels                                                                         |
+| -------------------- | ---------------------- | ------------------------ | ---------------------------------------------------------------------------------- |
+| RPC Performance      | `rippled-rpc-perf`     | Prometheus (SpanMetrics) | Request rate by command, p95 latency by command, error rate, heatmap, top commands |
+| Transaction Overview | `rippled-transactions` | Prometheus (SpanMetrics) | Processing rate, latency p95/p50, local vs relay split, apply duration, heatmap    |
+| Consensus Health     | `rippled-consensus`    | Prometheus (SpanMetrics) | Round duration p95/p50, proposals rate, close duration, mode timeline, heatmap     |
+| Ledger Operations    | `rippled-ledger-ops`   | Prometheus (SpanMetrics) | Build rate, build duration, validation rate, store rate, build vs close comparison |
+| Peer Network         | `rippled-peer-net`     | Prometheus (SpanMetrics) | Proposal receive rate, validation receive rate, trusted vs untrusted breakdown     |
+
+### 3.2 System Metrics Dashboards (5)
+
+| Dashboard              | UID                             | Data Source       | Key Panels                                                                        |
+| ---------------------- | ------------------------------- | ----------------- | --------------------------------------------------------------------------------- |
+| Node Health            | `rippled-system-node-health`    | Prometheus (OTLP) | Ledger age, operating mode, I/O latency, job queue, fetch rate                    |
+| Network Traffic        | `rippled-system-network`        | Prometheus (OTLP) | Active peers, disconnects, bytes in/out, messages in/out, traffic by category     |
+| RPC & Pathfinding      | `rippled-system-rpc`            | Prometheus (OTLP) | RPC rate, response time/size, pathfinding duration, resource warnings/drops       |
+| Overlay Traffic Detail | `rippled-system-overlay-detail` | Prometheus (OTLP) | Squelch, overhead, validator lists, set get/share, have/requested tx, proof paths |
+| Ledger Data & Sync     | `rippled-system-ledger-sync`    | Prometheus (OTLP) | Ledger data exchange, legacy ledger share/get, getobject by type, traffic heatmap |
+
+### 3.3 Accessing the Dashboards
+
+1. Open Grafana at **http://localhost:3000**
+2. Navigate to **Dashboards → rippled** folder
+3. All 10 dashboards are auto-provisioned from `docker/telemetry/grafana/dashboards/`
+
+---
+
+## 4. Jaeger Trace Search Guide
+
+> **See also**: [08-appendix.md](./08-appendix.md) §8.2 for span hierarchy visualizations. [05-configuration-reference.md](./05-configuration-reference.md) §5.8.5 for TraceQL examples when using Grafana Tempo instead of Jaeger.
+
+### Finding Traces by Type
+
+| What to Find             | Jaeger Search Parameters                                   |
+| ------------------------ | ---------------------------------------------------------- |
+| All RPC calls            | Service: `rippled`, Operation: `rpc.request`               |
+| Specific RPC command     | Operation: `rpc.command.server_info` (or any command name) |
+| Slow RPC calls           | Operation: `rpc.command.*`, Min Duration: `100ms`          |
+| Failed RPC calls         | Tag: `xrpl.rpc.status=error`                               |
+| Specific transaction     | Tag: `xrpl.tx.hash=<hex_hash>`                             |
+| Local transactions only  | Tag: `xrpl.tx.local=true`                                  |
+| Consensus rounds         | Operation: `consensus.accept`                              |
+| Rounds by mode           | Tag: `xrpl.consensus.mode=proposing`                       |
+| Specific ledger          | Tag: `xrpl.ledger.seq=12345`                               |
+| Peer proposals (trusted) | Tag: `xrpl.peer.proposal.trusted=true`                     |
+
+### Trace Structure
+
+A typical RPC trace shows the span hierarchy:
+
+```
+rpc.request (ServerHandler)
+  └── rpc.process (ServerHandler)
+       └── rpc.command.server_info (RPCHandler)
+```
+
+A consensus round produces independent spans (not parent-child):
+
+```
+consensus.ledger_close        (close event)
+consensus.proposal.send       (broadcast proposal)
+ledger.build                  (build new ledger)
+  └── tx.apply                (apply transaction set)
+consensus.accept              (accept result)
+consensus.validation.send     (send validation)
+ledger.validate               (promote to validated)
+ledger.store                  (persist to DB)
+```
+
+---
+
+## 5. Prometheus Query Examples
+
+> **See also**: [05-configuration-reference.md](./05-configuration-reference.md) §5.8.7 for correlating Prometheus system metrics with trace-derived metrics.
+
+### Span-Derived Metrics
+
+```promql
+# RPC request rate by command (last 5 minutes)
+sum by (xrpl_rpc_command) (rate(traces_span_metrics_calls_total{span_name=~"rpc.command.*"}[5m]))
+
+# RPC p95 latency by command
+histogram_quantile(0.95, sum by (le, xrpl_rpc_command) (rate(traces_span_metrics_duration_milliseconds_bucket{span_name=~"rpc.command.*"}[5m])))
+
+# Consensus round duration p95
+histogram_quantile(0.95, sum by (le) (rate(traces_span_metrics_duration_milliseconds_bucket{span_name="consensus.accept"}[5m])))
+
+# Transaction processing rate (local vs relay)
+sum by (xrpl_tx_local) (rate(traces_span_metrics_calls_total{span_name="tx.process"}[5m]))
+
+# Trusted vs untrusted proposal rate
+sum by (xrpl_peer_proposal_trusted) (rate(traces_span_metrics_calls_total{span_name="peer.proposal.receive"}[5m]))
+```
+
+### StatsD Metrics
+
+```promql
+# Validated ledger age (should be < 10s)
+rippled_LedgerMaster_Validated_Ledger_Age
+
+# Active peer count
+rippled_Peer_Finder_Active_Inbound_Peers + rippled_Peer_Finder_Active_Outbound_Peers
+
+# RPC response time p95
+histogram_quantile(0.95, rippled_rpc_time_bucket)
+
+# Total network bytes in (rate)
+rate(rippled_total_Bytes_In[5m])
+
+# Operating mode (should be "Full" after startup)
+rippled_State_Accounting_Full_duration
+```
+
+---
+
+## 5a. Log-Trace Correlation (Phase 8)
+
+> **Plan details**: [06-implementation-phases.md §6.8.1](./06-implementation-phases.md) — motivation, architecture, Mermaid diagrams
+> **Task breakdown**: [Phase8_taskList.md](./Phase8_taskList.md) — per-task implementation details
+
+Phase 8 injects OTel trace context into rippled's `Logs::format()` output, enabling log-trace correlation. When a log line is emitted within an active OTel span, the trace and span identifiers are automatically appended after the severity field:
+
+### Log Format
+
+```
+<timestamp> <partition>:<severity> trace_id=<32hex> span_id=<16hex> <message>
+```
+
+Example:
+
+```
+2024-01-15T10:30:45.123Z LedgerMaster:NFO trace_id=abc123def456789012345678abcdef01 span_id=0123456789abcdef Validated ledger 42
+```
+
+- **`trace_id=<hex32>`** — 32-character lowercase hex trace identifier. Links to the distributed trace in Tempo/Jaeger.
+- **`span_id=<hex16>`** — 16-character lowercase hex span identifier. Identifies the specific span within the trace.
+- **Only present** when the log is emitted within an active OTel span. Log lines outside of traced code paths have no trace context fields.
+
+### Implementation
+
+The trace context injection is implemented in `Logs::format()` (`src/libxrpl/basics/Log.cpp`), guarded by `#ifdef XRPL_ENABLE_TELEMETRY`. It reads the current span from OTel's thread-local runtime context via `opentelemetry::trace::GetSpan()` and `opentelemetry::context::RuntimeContext::GetCurrent()`. Both calls are lock-free thread-local reads measured at <10ns per call.
+
+### Log Ingestion Pipeline
+
+```
+rippled debug.log -> OTel Collector filelog receiver -> regex_parser -> Loki exporter -> Grafana Loki
+```
+
+The OTel Collector's `filelog` receiver tails `debug.log` files and uses a `regex_parser` operator to extract structured fields:
+
+| Field       | Type     | Description                                              |
+| ----------- | -------- | -------------------------------------------------------- |
+| `timestamp` | datetime | Log timestamp                                            |
+| `partition` | string   | Log partition (e.g., `LedgerMaster`, `PeerImp`)          |
+| `severity`  | string   | Severity code (`TRC`, `DBG`, `NFO`, `WRN`, `ERR`, `FTL`) |
+| `trace_id`  | string   | 32-hex trace identifier (optional)                       |
+| `span_id`   | string   | 16-hex span identifier (optional)                        |
+| `message`   | string   | Log message body                                         |
+
+### Grafana Correlation
+
+Bidirectional linking between logs and traces is configured via Grafana datasource provisioning:
+
+- **Tempo -> Loki** (`tracesToLogs`): Clicking "Logs for this trace" on a Tempo trace view filters Loki logs by `trace_id`, showing all log lines from that trace.
+- **Loki -> Tempo** (`derivedFields`): A regex-based derived field on the Loki datasource extracts `trace_id` from log lines and renders it as a clickable link to the corresponding trace in Tempo.
+
+### Loki Backend
+
+Grafana Loki (v2.9.0) serves as the log storage backend. It receives log entries from the OTel Collector's `loki` exporter via the push API at `http://loki:3100/loki/api/v1/push`.
+
+### LogQL Query Examples
+
+```logql
+# Find all logs for a specific trace
+{job="rippled"} |= "trace_id=abc123def456789012345678abcdef01"
+
+# Error logs with trace context
+{job="rippled"} |= "ERR" |= "trace_id="
+
+# Logs from a specific partition with trace context
+{job="rippled"} |= "LedgerMaster" | regexp `trace_id=(?P<trace_id>[a-f0-9]+)` | trace_id != ""
+
+# Count traced log lines over time
+count_over_time({job="rippled"} |= "trace_id=" [5m])
+```
+
+---
+
+## 5b. Future: Internal Metric Gap Fill (Phase 9)
+
+> **Status**: Planned, not yet implemented.
+> **Plan details**: [06-implementation-phases.md §6.8.2](./06-implementation-phases.md) — motivation, architecture, third-party context
+> **Task breakdown**: [Phase9_taskList.md](./Phase9_taskList.md) — per-task implementation details
+
+Phase 9 fills ~50+ metrics that exist inside rippled but currently lack time-series export. Uses a hybrid approach: `beast::insight` extensions for NodeStore I/O, OTel `ObservableGauge` async callbacks for new categories.
+
+### New Metric Categories
+
+#### NodeStore I/O (via beast::insight)
+
+| Prometheus Metric                    | Type  | Description                         |
+| ------------------------------------ | ----- | ----------------------------------- |
+| `rippled_nodestore_reads_total`      | Gauge | Cumulative read operations          |
+| `rippled_nodestore_reads_hit`        | Gauge | Cache-served reads                  |
+| `rippled_nodestore_writes`           | Gauge | Cumulative write operations         |
+| `rippled_nodestore_written_bytes`    | Gauge | Cumulative bytes written            |
+| `rippled_nodestore_read_bytes`       | Gauge | Cumulative bytes read               |
+| `rippled_nodestore_read_duration_us` | Gauge | Cumulative read time (microseconds) |
+| `rippled_nodestore_write_load`       | Gauge | Current write load score            |
+| `rippled_nodestore_read_queue`       | Gauge | Items in read queue                 |
+
+#### Cache Hit Rates (via OTel MetricsRegistry)
+
+| Prometheus Metric               | Type  | Description                          |
+| ------------------------------- | ----- | ------------------------------------ |
+| `rippled_cache_SLE_hit_rate`    | Gauge | SLE cache hit rate (0.0-1.0)         |
+| `rippled_cache_ledger_hit_rate` | Gauge | Ledger object cache hit rate         |
+| `rippled_cache_AL_hit_rate`     | Gauge | AcceptedLedger cache hit rate        |
+| `rippled_cache_treenode_size`   | Gauge | SHAMap TreeNode cache size (entries) |
+| `rippled_cache_fullbelow_size`  | Gauge | FullBelow cache size                 |
+
+#### Transaction Queue (via OTel MetricsRegistry)
+
+| Prometheus Metric                      | Type  | Description                      |
+| -------------------------------------- | ----- | -------------------------------- |
+| `rippled_txq_count`                    | Gauge | Current transactions in queue    |
+| `rippled_txq_max_size`                 | Gauge | Maximum queue capacity           |
+| `rippled_txq_in_ledger`                | Gauge | Transactions in open ledger      |
+| `rippled_txq_per_ledger`               | Gauge | Expected transactions per ledger |
+| `rippled_txq_open_ledger_fee_level`    | Gauge | Open ledger fee escalation level |
+| `rippled_txq_med_fee_level`            | Gauge | Median fee level in queue        |
+| `rippled_txq_reference_fee_level`      | Gauge | Reference fee level              |
+| `rippled_txq_min_processing_fee_level` | Gauge | Minimum fee to get processed     |
+
+#### PerfLog Per-RPC Method (via OTel Metrics SDK)
+
+| Prometheus Metric                       | Type      | Labels            | Description                 |
+| --------------------------------------- | --------- | ----------------- | --------------------------- |
+| `rippled_rpc_method_started_total`      | Counter   | `method="<name>"` | RPC calls started           |
+| `rippled_rpc_method_finished_total`     | Counter   | `method="<name>"` | RPC calls completed         |
+| `rippled_rpc_method_errored_total`      | Counter   | `method="<name>"` | RPC calls errored           |
+| `rippled_rpc_method_duration_us_bucket` | Histogram | `method="<name>"` | Execution time distribution |
+
+#### PerfLog Per-Job Type (via OTel Metrics SDK)
+
+| Prometheus Metric                        | Type      | Labels              | Description     |
+| ---------------------------------------- | --------- | ------------------- | --------------- |
+| `rippled_job_queued_total`               | Counter   | `job_type="<name>"` | Jobs queued     |
+| `rippled_job_started_total`              | Counter   | `job_type="<name>"` | Jobs started    |
+| `rippled_job_finished_total`             | Counter   | `job_type="<name>"` | Jobs completed  |
+| `rippled_job_queued_duration_us_bucket`  | Histogram | `job_type="<name>"` | Queue wait time |
+| `rippled_job_running_duration_us_bucket` | Histogram | `job_type="<name>"` | Execution time  |
+
+#### Counted Object Instances (via OTel MetricsRegistry)
+
+| Prometheus Metric      | Type  | Labels          | Description                     |
+| ---------------------- | ----- | --------------- | ------------------------------- |
+| `rippled_object_count` | Gauge | `type="<name>"` | Live instances of internal type |
+
+Tracked types: `Transaction`, `Ledger`, `NodeObject`, `STTx`, `STLedgerEntry`, `InboundLedger`, `Pathfinder`, `PathRequest`, `HashRouterEntry`
+
+#### Fee Escalation & Load Factors (via OTel MetricsRegistry)
+
+| Prometheus Metric                    | Type  | Description                          |
+| ------------------------------------ | ----- | ------------------------------------ |
+| `rippled_load_factor`                | Gauge | Combined transaction cost multiplier |
+| `rippled_load_factor_server`         | Gauge | Server + cluster + network load      |
+| `rippled_load_factor_local`          | Gauge | Local server load only               |
+| `rippled_load_factor_net`            | Gauge | Network-wide load estimate           |
+| `rippled_load_factor_cluster`        | Gauge | Cluster peer load                    |
+| `rippled_load_factor_fee_escalation` | Gauge | Open ledger fee escalation           |
+| `rippled_load_factor_fee_queue`      | Gauge | Queue entry fee level                |
+
+### New Grafana Dashboards (Phase 9)
+
+| Dashboard          | UID                  | Data Source | Key Panels                                                        |
+| ------------------ | -------------------- | ----------- | ----------------------------------------------------------------- |
+| Fee Market & TxQ   | `rippled-fee-market` | Prometheus  | TxQ depth/capacity, fee levels, load factor breakdown, escalation |
+| Job Queue Analysis | `rippled-job-queue`  | Prometheus  | Per-job rates, queue wait times, execution times, queue depth     |
+
+---
+
+## 5c. Future: Synthetic Workload Generation & Telemetry Validation (Phase 10)
+
+> **Plan details**: [06-implementation-phases.md §6.8.3](./06-implementation-phases.md) — motivation, architecture
+> **Task breakdown**: [Phase10_taskList.md](./Phase10_taskList.md) — per-task implementation details
+> **Tools**: [docker/telemetry/workload/](../docker/telemetry/workload/) — RPC load generator, transaction submitter, validation suite, benchmarks
+
+Phase 10 builds a 5-node validator docker-compose harness with RPC load generators, transaction submitters, and automated validation scripts that verify all spans, metrics, dashboards, and log-trace correlation work end-to-end. Includes a benchmark suite comparing telemetry-ON vs telemetry-OFF overhead.
+
+### Running the Validation Suite
+
+```bash
+# Full end-to-end validation (start cluster, generate load, validate):
+docker/telemetry/workload/run-full-validation.sh --xrpld .build/xrpld
+
+# Validation only (assumes stack and cluster are already running):
+python3 docker/telemetry/workload/validate_telemetry.py --report /tmp/report.json
+
+# Performance benchmark (baseline vs telemetry):
+docker/telemetry/workload/benchmark.sh --xrpld .build/xrpld --duration 300
+```
+
+### Validated Telemetry Inventory
+
+| Category           | Expected Count | Validation Method                | Config File             |
+| ------------------ | -------------- | -------------------------------- | ----------------------- |
+| Trace spans        | 17             | Jaeger/Tempo API query           | `expected_spans.json`   |
+| Span attributes    | 22             | Per-span attribute assertion     | `expected_spans.json`   |
+| StatsD metrics     | 255+           | Prometheus query                 | `expected_metrics.json` |
+| Phase 9 metrics    | 50+            | Prometheus query                 | `expected_metrics.json` |
+| SpanMetrics RED    | 4 per span     | Prometheus query                 | `expected_metrics.json` |
+| Grafana dashboards | 10             | Dashboard API "no data" check    | `expected_metrics.json` |
+| Log-trace links    | Present        | Loki query + Tempo reverse check | —                       |
+
+### Performance Overhead Targets
+
+| Metric            | Target       | Measurement Method                  |
+| ----------------- | ------------ | ----------------------------------- |
+| CPU overhead      | < 3%         | ps avg CPU% baseline vs telemetry   |
+| Memory overhead   | < 5MB        | ps peak RSS baseline vs telemetry   |
+| RPC p99 latency   | < 2ms impact | server_info round-trip timing       |
+| Throughput impact | < 5%         | Ledger close rate comparison        |
+| Consensus impact  | < 1%         | Consensus round time p95 comparison |
+
+---
+
+## 5d. Future: Third-Party Data Collection Pipelines (Phase 11)
+
+> **Status**: Planned, not yet implemented.
+> **Plan details**: [06-implementation-phases.md §6.8.4](./06-implementation-phases.md) — motivation, architecture, consumer gap analysis
+> **Task breakdown**: [Phase11_taskList.md](./Phase11_taskList.md) — per-task implementation details
+
+Phase 11 builds a custom OTel Collector receiver (Go) that polls rippled's admin RPCs and exports `xrpl_*` metrics for external consumers. No rippled code changes.
+
+### Exported Metrics (via Custom OTel Collector Receiver)
+
+#### Node Health (from server_info)
+
+| Prometheus Metric                       | Type  | Description                                     |
+| --------------------------------------- | ----- | ----------------------------------------------- |
+| `xrpl_server_state`                     | Gauge | Operating mode (0=disconnected ... 5=proposing) |
+| `xrpl_server_state_duration_seconds`    | Gauge | Seconds in current state                        |
+| `xrpl_uptime_seconds`                   | Gauge | Consecutive seconds running                     |
+| `xrpl_io_latency_ms`                    | Gauge | I/O subsystem latency                           |
+| `xrpl_amendment_blocked`                | Gauge | 1 if amendment-blocked, 0 otherwise             |
+| `xrpl_peers_count`                      | Gauge | Connected peers                                 |
+| `xrpl_validated_ledger_seq`             | Gauge | Latest validated ledger sequence                |
+| `xrpl_validated_ledger_age_seconds`     | Gauge | Seconds since last validated close              |
+| `xrpl_last_close_proposers`             | Gauge | Proposers in last consensus round               |
+| `xrpl_last_close_converge_time_seconds` | Gauge | Last consensus round duration                   |
+| `xrpl_load_factor`                      | Gauge | Transaction cost multiplier                     |
+| `xrpl_state_duration_seconds`           | Gauge | Per-state duration (`state` label)              |
+| `xrpl_state_transitions_total`          | Gauge | Per-state transition count (`state` label)      |
+
+#### Peer Topology (from peers)
+
+| Prometheus Metric           | Type  | Description                         |
+| --------------------------- | ----- | ----------------------------------- |
+| `xrpl_peers_inbound_count`  | Gauge | Inbound peer connections            |
+| `xrpl_peers_outbound_count` | Gauge | Outbound peer connections           |
+| `xrpl_peer_latency_p50_ms`  | Gauge | Median peer latency                 |
+| `xrpl_peer_latency_p95_ms`  | Gauge | p95 peer latency                    |
+| `xrpl_peer_version_count`   | Gauge | Peers per version (`version` label) |
+| `xrpl_peer_diverged_count`  | Gauge | Peers with diverged tracking status |
+
+#### Validator & Amendment (from validators, feature)
+
+| Prometheus Metric                     | Type  | Description                             |
+| ------------------------------------- | ----- | --------------------------------------- |
+| `xrpl_trusted_validators_count`       | Gauge | UNL validator count                     |
+| `xrpl_amendment_enabled_count`        | Gauge | Enabled amendments                      |
+| `xrpl_amendment_majority_count`       | Gauge | Amendments with majority                |
+| `xrpl_amendment_unsupported_majority` | Gauge | 1 if unsupported amendment has majority |
+| `xrpl_validator_list_active`          | Gauge | 1 if validator list is active           |
+
+#### Fee Market (from fee)
+
+| Prometheus Metric                | Type  | Description                           |
+| -------------------------------- | ----- | ------------------------------------- |
+| `xrpl_fee_open_ledger_fee_drops` | Gauge | Minimum fee for open ledger inclusion |
+| `xrpl_fee_median_fee_drops`      | Gauge | Median fee level                      |
+| `xrpl_fee_queue_size`            | Gauge | Current transaction queue depth       |
+| `xrpl_fee_current_ledger_size`   | Gauge | Transactions in current open ledger   |
+
+#### DEX & AMM (optional, from book_offers, amm_info)
+
+| Prometheus Metric          | Type  | Labels                | Description            |
+| -------------------------- | ----- | --------------------- | ---------------------- |
+| `xrpl_amm_tvl_drops`       | Gauge | `pool="<id>"`         | Total value locked     |
+| `xrpl_amm_trading_fee`     | Gauge | `pool="<id>"`         | Pool trading fee (bps) |
+| `xrpl_orderbook_bid_depth` | Gauge | `pair="<base/quote>"` | Total bid volume       |
+| `xrpl_orderbook_ask_depth` | Gauge | `pair="<base/quote>"` | Total ask volume       |
+| `xrpl_orderbook_spread`    | Gauge | `pair="<base/quote>"` | Best bid-ask spread    |
+
+### Phase 9: OTel SDK-Exported Metrics (MetricsRegistry)
+
+Phase 9 introduces the `MetricsRegistry` class (`src/xrpld/telemetry/MetricsRegistry.h/.cpp`)
+which registers metrics directly with the OpenTelemetry Metrics SDK. These are exported
+via OTLP/HTTP to the OTel Collector and scraped by Prometheus.
+
+#### NodeStore I/O (Observable Gauge — `nodestore_state`)
+
+| Prometheus Metric                                      | Type  | Labels   | Description                          |
+| ------------------------------------------------------ | ----- | -------- | ------------------------------------ |
+| `rippled_nodestore_state{metric="node_reads_total"}`   | Gauge | `metric` | Cumulative NodeStore read operations |
+| `rippled_nodestore_state{metric="node_reads_hit"}`     | Gauge | `metric` | Reads served from cache              |
+| `rippled_nodestore_state{metric="node_writes"}`        | Gauge | `metric` | Cumulative write operations          |
+| `rippled_nodestore_state{metric="node_written_bytes"}` | Gauge | `metric` | Cumulative bytes written             |
+| `rippled_nodestore_state{metric="node_read_bytes"}`    | Gauge | `metric` | Cumulative bytes read                |
+| `rippled_nodestore_state{metric="write_load"}`         | Gauge | `metric` | Current write load score             |
+| `rippled_nodestore_state{metric="read_queue"}`         | Gauge | `metric` | Items in read prefetch queue         |
+
+#### Cache Hit Rates & Sizes (Observable Gauge — `cache_metrics`)
+
+| Prometheus Metric                                     | Type  | Labels   | Description                   |
+| ----------------------------------------------------- | ----- | -------- | ----------------------------- |
+| `rippled_cache_metrics{metric="SLE_hit_rate"}`        | Gauge | `metric` | SLE cache hit rate (0.0-1.0)  |
+| `rippled_cache_metrics{metric="ledger_hit_rate"}`     | Gauge | `metric` | Ledger cache hit rate         |
+| `rippled_cache_metrics{metric="AL_hit_rate"}`         | Gauge | `metric` | AcceptedLedger cache hit rate |
+| `rippled_cache_metrics{metric="treenode_cache_size"}` | Gauge | `metric` | SHAMap TreeNode cache entries |
+| `rippled_cache_metrics{metric="treenode_track_size"}` | Gauge | `metric` | Tracked tree nodes            |
+| `rippled_cache_metrics{metric="fullbelow_size"}`      | Gauge | `metric` | FullBelow cache entries       |
+
+#### Transaction Queue (Observable Gauge — `txq_metrics`)
+
+| Prometheus Metric                                            | Type  | Labels   | Description                      |
+| ------------------------------------------------------------ | ----- | -------- | -------------------------------- |
+| `rippled_txq_metrics{metric="txq_count"}`                    | Gauge | `metric` | Transactions currently in queue  |
+| `rippled_txq_metrics{metric="txq_max_size"}`                 | Gauge | `metric` | Maximum queue capacity           |
+| `rippled_txq_metrics{metric="txq_in_ledger"}`                | Gauge | `metric` | Transactions in open ledger      |
+| `rippled_txq_metrics{metric="txq_per_ledger"}`               | Gauge | `metric` | Expected transactions per ledger |
+| `rippled_txq_metrics{metric="txq_reference_fee_level"}`      | Gauge | `metric` | Reference fee level              |
+| `rippled_txq_metrics{metric="txq_min_processing_fee_level"}` | Gauge | `metric` | Minimum fee to get processed     |
+| `rippled_txq_metrics{metric="txq_med_fee_level"}`            | Gauge | `metric` | Median fee level in queue        |
+| `rippled_txq_metrics{metric="txq_open_ledger_fee_level"}`    | Gauge | `metric` | Open ledger fee escalation level |
+
+#### Per-RPC Method Metrics (Synchronous Counters/Histogram)
+
+| Prometheus Metric                   | Type      | Labels            | Description                      |
+| ----------------------------------- | --------- | ----------------- | -------------------------------- |
+| `rippled_rpc_method_started_total`  | Counter   | `method="<name>"` | RPC calls started                |
+| `rippled_rpc_method_finished_total` | Counter   | `method="<name>"` | RPC calls completed successfully |
+| `rippled_rpc_method_errored_total`  | Counter   | `method="<name>"` | RPC calls that errored           |
+| `rippled_rpc_method_duration_us`    | Histogram | `method="<name>"` | Execution time distribution (us) |
+
+#### Per-Job-Type Metrics (Synchronous Counters/Histogram)
+
+| Prometheus Metric                 | Type      | Labels              | Description                       |
+| --------------------------------- | --------- | ------------------- | --------------------------------- |
+| `rippled_job_queued_total`        | Counter   | `job_type="<name>"` | Jobs enqueued                     |
+| `rippled_job_started_total`       | Counter   | `job_type="<name>"` | Jobs started                      |
+| `rippled_job_finished_total`      | Counter   | `job_type="<name>"` | Jobs completed                    |
+| `rippled_job_queued_duration_us`  | Histogram | `job_type="<name>"` | Queue wait time distribution (us) |
+| `rippled_job_running_duration_us` | Histogram | `job_type="<name>"` | Execution time distribution (us)  |
+
+#### Counted Object Instances (Observable Gauge — `object_count`)
+
+| Prometheus Metric                              | Type  | Labels          | Description                    |
+| ---------------------------------------------- | ----- | --------------- | ------------------------------ |
+| `rippled_object_count{type="Transaction"}`     | Gauge | `type="<name>"` | Live Transaction objects       |
+| `rippled_object_count{type="Ledger"}`          | Gauge | `type="<name>"` | Live Ledger objects            |
+| `rippled_object_count{type="NodeObject"}`      | Gauge | `type="<name>"` | Live NodeObject instances      |
+| `rippled_object_count{type="STTx"}`            | Gauge | `type="<name>"` | Serialized transaction objects |
+| `rippled_object_count{type="STLedgerEntry"}`   | Gauge | `type="<name>"` | Serialized ledger entries      |
+| `rippled_object_count{type="InboundLedger"}`   | Gauge | `type="<name>"` | Ledgers being fetched          |
+| `rippled_object_count{type="Pathfinder"}`      | Gauge | `type="<name>"` | Active pathfinding operations  |
+| `rippled_object_count{type="PathRequest"}`     | Gauge | `type="<name>"` | Active path requests           |
+| `rippled_object_count{type="HashRouterEntry"}` | Gauge | `type="<name>"` | Hash router entries            |
+
+#### Load Factor Breakdown (Observable Gauge — `load_factor_metrics`)
+
+| Prometheus Metric                                                  | Type  | Labels   | Description                             |
+| ------------------------------------------------------------------ | ----- | -------- | --------------------------------------- |
+| `rippled_load_factor_metrics{metric="load_factor"}`                | Gauge | `metric` | Combined transaction cost multiplier    |
+| `rippled_load_factor_metrics{metric="load_factor_server"}`         | Gauge | `metric` | Server + cluster + network contribution |
+| `rippled_load_factor_metrics{metric="load_factor_local"}`          | Gauge | `metric` | Local server load only                  |
+| `rippled_load_factor_metrics{metric="load_factor_net"}`            | Gauge | `metric` | Network-wide load estimate              |
+| `rippled_load_factor_metrics{metric="load_factor_cluster"}`        | Gauge | `metric` | Cluster peer load                       |
+| `rippled_load_factor_metrics{metric="load_factor_fee_escalation"}` | Gauge | `metric` | Open ledger fee escalation              |
+| `rippled_load_factor_metrics{metric="load_factor_fee_queue"}`      | Gauge | `metric` | Queue entry fee level                   |
+
+#### Prometheus Query Examples (Phase 9)
+
+```promql
+# NodeStore cache hit ratio
+rippled_nodestore_state{metric="node_reads_hit"} / rippled_nodestore_state{metric="node_reads_total"}
+
+# RPC error rate for server_info
+rate(rippled_rpc_method_errored_total{method="server_info"}[5m])
+
+# Job queue wait time p95
+histogram_quantile(0.95, sum by (le) (rate(rippled_job_queued_duration_us_bucket[5m])))
+
+# TxQ utilization percentage
+rippled_txq_metrics{metric="txq_count"} / rippled_txq_metrics{metric="txq_max_size"}
+
+# High load factor alert candidate
+rippled_load_factor_metrics{metric="load_factor"} > 5
+```
+
+### New Grafana Dashboards (Phase 9)
+
+| Dashboard              | UID                  | Data Source | Key Panels                                                |
+| ---------------------- | -------------------- | ----------- | --------------------------------------------------------- |
+| Fee Market & TxQ       | `rippled-fee-market` | Prometheus  | TxQ depth/capacity, fee levels, load factor breakdown     |
+| Job Queue Analysis     | `rippled-job-queue`  | Prometheus  | Per-job rates, queue wait times, execution times          |
+| RPC Performance (OTel) | `rippled-rpc-perf`   | Prometheus  | Per-method call rates, error rates, latency distributions |
+
+### Updated Grafana Dashboards (Phase 9)
+
+| Dashboard            | UID                          | New Panels Added                                       |
+| -------------------- | ---------------------------- | ------------------------------------------------------ |
+| Node Health (StatsD) | `rippled-statsd-node-health` | NodeStore I/O, cache hit rates, object instance counts |
+
+### New Grafana Dashboards (Phase 11)
+
+| Dashboard          | UID                           | Data Source | Key Panels                                                             |
+| ------------------ | ----------------------------- | ----------- | ---------------------------------------------------------------------- |
+| Validator Health   | `rippled-validator-health`    | Prometheus  | Server state timeline, proposer count, converge time, amendment voting |
+| Network Topology   | `rippled-network-topology`    | Prometheus  | Peer count, version distribution, latency distribution, diverged peers |
+| Fee Market (Ext)   | `rippled-fee-market-external` | Prometheus  | Fee levels, queue depth, load factor breakdown, escalation timeline    |
+| DEX & AMM Overview | `rippled-dex-amm`             | Prometheus  | AMM TVL, order book depth, spread trends, trading fee revenue          |
+
+### Prometheus Alerting Rules (Phase 11)
+
+| Alert Name                         | Severity | Condition                                                   | For |
+| ---------------------------------- | -------- | ----------------------------------------------------------- | --- |
+| `XRPLServerNotFull`                | Critical | `xrpl_server_state < 4` for 15m                             | 15m |
+| `XRPLAmendmentBlocked`             | Critical | `xrpl_amendment_blocked == 1`                               | 1m  |
+| `XRPLNoPeers`                      | Critical | `xrpl_peers_count == 0`                                     | 5m  |
+| `XRPLLedgerStale`                  | Critical | `xrpl_validated_ledger_age_seconds > 120`                   | 2m  |
+| `XRPLHighIOLatency`                | Critical | `xrpl_io_latency_ms > 100`                                  | 5m  |
+| `XRPLUnsupportedAmendmentMajority` | Critical | `xrpl_amendment_unsupported_majority == 1`                  | 1m  |
+| `XRPLLowPeerCount`                 | Warning  | `xrpl_peers_count < 10`                                     | 15m |
+| `XRPLHighLoadFactor`               | Warning  | `xrpl_load_factor > 10`                                     | 10m |
+| `XRPLSlowConsensus`                | Warning  | `xrpl_last_close_converge_time_seconds > 6`                 | 5m  |
+| `XRPLValidatorListExpiring`        | Warning  | `(xrpl_validator_list_expiration_seconds - time()) < 86400` | 1h  |
+| `XRPLStateFlapping`                | Warning  | `rate(xrpl_state_transitions_total{state="full"}[1h]) > 2`  | 30m |
+
+---
+
+## 6. Known Issues
+
+| Issue                                                              | Impact                                           | Status                                                               |
+| ------------------------------------------------------------------ | ------------------------------------------------ | -------------------------------------------------------------------- |
+| `warn` and `drop` metrics use non-standard StatsD `\|m` meter type | Metrics silently dropped by OTel StatsD receiver | Phase 6 Task 6.1 — needs `\|m` → `\|c` change in StatsDCollector.cpp |
+| `rippled_job_count` may not emit in standalone mode                | Missing from Prometheus in some test configs     | Requires active job queue activity                                   |
+| `rippled_rpc_requests` depends on `[insight]` config               | Zero series if StatsD not configured             | Requires `[insight] server=statsd` in xrpld.cfg                      |
+| Peer tracing disabled by default                                   | No `peer.*` spans unless `trace_peer=1`          | Intentional — high volume on mainnet                                 |
+
+---
+
+## 7. Privacy and Data Collection
+
+The telemetry system is designed with privacy in mind:
+
+- **No private keys** are ever included in spans or metrics
+- **No account balances** or financial data is traced
+- **Transaction hashes** are included (public on-ledger data) but not transaction contents
+- **Peer IDs** are internal identifiers, not IP addresses
+- **All telemetry is opt-in** — disabled by default at build time (`-Dtelemetry=OFF`)
+- **Sampling** reduces data volume — `sampling_ratio=0.01` recommended for production
+- **Data stays local** — the default stack sends data to `localhost` only
+
+---
+
+## 8. Configuration Quick Reference
+
+> **Full reference**: [05-configuration-reference.md](./05-configuration-reference.md) §5.1 for all `[telemetry]` options with defaults, the config parser implementation, and collector YAML configurations (dev and production).
+
+### Minimal Setup (development)
+
+```ini
+[telemetry]
+enabled=1
+
+[insight]
+server=statsd
+address=127.0.0.1:8125
+prefix=rippled
+```
+
+### Production Setup
+
+```ini
+[telemetry]
+enabled=1
+endpoint=http://otel-collector:4318/v1/traces
+sampling_ratio=0.01
+trace_peer=0
+batch_size=1024
+max_queue_size=4096
+
+[insight]
+server=statsd
+address=otel-collector:8125
+prefix=rippled
+```
+
+### Trace Category Toggle
+
+| Config Key           | Default | Controls                     |
+| -------------------- | ------- | ---------------------------- |
+| `trace_rpc`          | `1`     | `rpc.*` spans                |
+| `trace_transactions` | `1`     | `tx.*` spans                 |
+| `trace_consensus`    | `1`     | `consensus.*` spans          |
+| `trace_ledger`       | `1`     | `ledger.*` spans             |
+| `trace_peer`         | `0`     | `peer.*` spans (high volume) |

OpenTelemetryPlan/OpenTelemetryPlan.md

@@ -0,0 +1,205 @@
+# [OpenTelemetry](00-tracing-fundamentals.md) Distributed Tracing Implementation Plan for rippled (xrpld)
+
+## Executive Summary
+
+This document provides a comprehensive implementation plan for integrating OpenTelemetry distributed tracing into the rippled XRP Ledger node software. The plan addresses the unique challenges of a decentralized peer-to-peer system where trace context must propagate across network boundaries between independent nodes.
+
+### Key Benefits
+
+- **End-to-end transaction visibility**: Track transactions from submission through consensus to ledger inclusion
+- **Consensus round analysis**: Understand timing and behavior of consensus phases across validators
+- **RPC performance insights**: Identify slow handlers and optimize response times
+- **Network topology understanding**: Visualize message propagation patterns between peers
+- **Incident debugging**: Correlate events across distributed nodes during issues
+
+### Estimated Performance Overhead
+
+| Metric        | Overhead   | Notes                               |
+| ------------- | ---------- | ----------------------------------- |
+| CPU           | 1-3%       | Span creation and attribute setting |
+| Memory        | 2-5 MB     | Batch buffer for pending spans      |
+| Network       | 10-50 KB/s | Compressed OTLP export to collector |
+| Latency (p99) | <2%        | With proper sampling configuration  |
+
+---
+
+## Document Structure
+
+This implementation plan is organized into modular documents for easier navigation:
+
+<div align="center">
+
+```mermaid
+flowchart TB
+    overview["📋 OpenTelemetryPlan.md<br/>(This Document)"]
+
+    subgraph analysis["Analysis & Design"]
+        arch["01-architecture-analysis.md"]
+        design["02-design-decisions.md"]
+    end
+
+    subgraph impl["Implementation"]
+        strategy["03-implementation-strategy.md"]
+        code["04-code-samples.md"]
+        config["05-configuration-reference.md"]
+    end
+
+    subgraph deploy["Deployment & Planning"]
+        phases["06-implementation-phases.md"]
+        backends["07-observability-backends.md"]
+        appendix["08-appendix.md"]
+        dataref["09-data-collection-reference.md"]
+    end
+
+    overview --> analysis
+    overview --> impl
+    overview --> deploy
+
+    arch --> design
+    design --> strategy
+    strategy --> code
+    code --> config
+    config --> phases
+    phases --> backends
+    backends --> appendix
+    appendix --> dataref
+
+    style overview fill:#1b5e20,stroke:#0d3d14,color:#fff,stroke-width:2px
+    style analysis fill:#0d47a1,stroke:#082f6a,color:#fff
+    style impl fill:#bf360c,stroke:#8c2809,color:#fff
+    style deploy fill:#4a148c,stroke:#2e0d57,color:#fff
+    style arch fill:#0d47a1,stroke:#082f6a,color:#fff
+    style design fill:#0d47a1,stroke:#082f6a,color:#fff
+    style strategy fill:#bf360c,stroke:#8c2809,color:#fff
+    style code fill:#bf360c,stroke:#8c2809,color:#fff
+    style config fill:#bf360c,stroke:#8c2809,color:#fff
+    style phases fill:#4a148c,stroke:#2e0d57,color:#fff
+    style backends fill:#4a148c,stroke:#2e0d57,color:#fff
+    style appendix fill:#4a148c,stroke:#2e0d57,color:#fff
+    style dataref fill:#4a148c,stroke:#2e0d57,color:#fff
+```
+
+</div>
+
+---
+
+## Table of Contents
+
+| Section | Document                                                       | Description                                                            |
+| ------- | -------------------------------------------------------------- | ---------------------------------------------------------------------- |
+| **1**   | [Architecture Analysis](./01-architecture-analysis.md)         | rippled component analysis, trace points, instrumentation priorities   |
+| **2**   | [Design Decisions](./02-design-decisions.md)                   | SDK selection, exporters, span naming, attributes, context propagation |
+| **3**   | [Implementation Strategy](./03-implementation-strategy.md)     | Directory structure, key principles, performance optimization          |
+| **4**   | [Code Samples](./04-code-samples.md)                           | Complete C++ implementation examples for all components                |
+| **5**   | [Configuration Reference](./05-configuration-reference.md)     | rippled config, CMake integration, Collector configurations            |
+| **6**   | [Implementation Phases](./06-implementation-phases.md)         | 5-phase timeline, tasks, risks, success metrics                        |
+| **7**   | [Observability Backends](./07-observability-backends.md)       | Backend selection guide and production architecture                    |
+| **8**   | [Appendix](./08-appendix.md)                                   | Glossary, references, version history                                  |
+| **9**   | [Data Collection Reference](./09-data-collection-reference.md) | Complete inventory of spans, attributes, metrics, and dashboards       |
+
+---
+
+## 1. Architecture Analysis
+
+The rippled node consists of several key components that require instrumentation for comprehensive distributed tracing. The main areas include the RPC server (HTTP/WebSocket), Overlay P2P network, Consensus mechanism (RCLConsensus), JobQueue for async task execution, and existing observability infrastructure (PerfLog, Insight/StatsD, Journal logging).
+
+Key trace points span across transaction submission via RPC, peer-to-peer message propagation, consensus round execution, and ledger building. The implementation prioritizes high-value, low-risk components first: RPC handlers provide immediate value with minimal risk, while consensus tracing requires careful implementation to avoid timing impacts.
+
+➡️ **[Read full Architecture Analysis](./01-architecture-analysis.md)**
+
+---
+
+## 2. Design Decisions
+
+The OpenTelemetry C++ SDK is selected for its CNCF backing, active development, and native performance characteristics. Traces are exported via OTLP/gRPC (primary) or OTLP/HTTP (fallback) to an OpenTelemetry Collector, which provides flexible routing and sampling.
+
+Span naming follows a hierarchical `<component>.<operation>` convention (e.g., `rpc.submit`, `tx.relay`, `consensus.round`). Context propagation uses W3C Trace Context headers for HTTP and embedded Protocol Buffer fields for P2P messages. The implementation coexists with existing PerfLog and Insight observability systems through correlation IDs.
+
+**Data Collection & Privacy**: Telemetry collects only operational metadata (timing, counts, hashes) — never sensitive content (private keys, balances, amounts, raw payloads). Privacy protection includes account hashing, configurable redaction, sampling, and collector-level filtering. Node operators retain full control(not penned down in this document yet) over what data is exported.
+
+➡️ **[Read full Design Decisions](./02-design-decisions.md)**
+
+---
+
+## 3. Implementation Strategy
+
+The telemetry code is organized under `include/xrpl/telemetry/` for headers and `src/libxrpl/telemetry/` for implementation. Key principles include RAII-based span management via `SpanGuard`, conditional compilation with `XRPL_ENABLE_TELEMETRY`, and minimal runtime overhead through batch processing and efficient sampling.
+
+Performance optimization strategies include probabilistic head sampling (10% default), tail-based sampling at the collector for errors and slow traces, batch export to reduce network overhead, and conditional instrumentation that compiles to no-ops when disabled.
+
+➡️ **[Read full Implementation Strategy](./03-implementation-strategy.md)**
+
+---
+
+## 4. Code Samples
+
+Complete C++ implementation examples are provided for all telemetry components:
+
+- `Telemetry.h` - Core interface for tracer access and span creation
+- `SpanGuard.h` - RAII wrapper for automatic span lifecycle management
+- `TracingInstrumentation.h` - Macros for conditional instrumentation
+- Protocol Buffer extensions for trace context propagation
+- Module-specific instrumentation (RPC, Consensus, P2P, JobQueue)
+
+➡️ **[View all Code Samples](./04-code-samples.md)**
+
+---
+
+## 5. Configuration Reference
+
+Configuration is handled through the `[telemetry]` section in `xrpld.cfg` with options for enabling/disabling, exporter selection, endpoint configuration, sampling ratios, and component-level filtering. CMake integration includes a `XRPL_ENABLE_TELEMETRY` option for compile-time control.
+
+OpenTelemetry Collector configurations are provided for development (with Jaeger) and production (with tail-based sampling, Tempo, and Elastic APM). Docker Compose examples enable quick local development environment setup.
+
+➡️ **[View full Configuration Reference](./05-configuration-reference.md)**
+
+---
+
+## 6. Implementation Phases
+
+The implementation spans 13 weeks across 8 phases:
+
+| Phase | Duration    | Focus                 | Key Deliverables                                            |
+| ----- | ----------- | --------------------- | ----------------------------------------------------------- |
+| 1     | Weeks 1-2   | Core Infrastructure   | SDK integration, Telemetry interface, Configuration         |
+| 2     | Weeks 3-4   | RPC Tracing           | HTTP context extraction, Handler instrumentation            |
+| 3     | Weeks 5-6   | Transaction Tracing   | Protocol Buffer context, Relay propagation                  |
+| 4     | Weeks 7-8   | Consensus Tracing     | Round spans, Proposal/validation tracing                    |
+| 5     | Week 9      | Documentation         | Runbook, Dashboards, Training                               |
+| 6     | Week 10     | StatsD Metrics Bridge | OTel Collector StatsD receiver, 3 Grafana dashboards        |
+| 7     | Weeks 11-12 | Native OTel Metrics   | OTelCollector impl, OTLP metrics export, StatsD deprecation |
+| 8     | Week 13     | Log-Trace Correlation | trace_id in logs, Loki ingestion, Tempo↔Loki linking        |
+
+**Total Effort**: 65.1 developer-days with 2 developers
+
+➡️ **[View full Implementation Phases](./06-implementation-phases.md)**
+
+---
+
+## 7. Observability Backends
+
+For development and testing, Jaeger provides easy setup with a good UI. For production deployments, Grafana Tempo is recommended for its cost-effectiveness and Grafana integration, while Elastic APM is ideal for organizations with existing Elastic infrastructure.
+
+The recommended production architecture uses a gateway collector pattern with regional collectors performing tail-based sampling, routing traces to multiple backends (Tempo for primary storage, Elastic for log correlation, S3/GCS for long-term archive).
+
+➡️ **[View Observability Backend Recommendations](./07-observability-backends.md)**
+
+---
+
+## 8. Appendix
+
+The appendix contains a glossary of OpenTelemetry and rippled-specific terms, references to external documentation and specifications, version history for this implementation plan, and a complete document index.
+
+➡️ **[View Appendix](./08-appendix.md)**
+
+---
+
+## 9. Data Collection Reference
+
+A single-source-of-truth reference documenting every piece of telemetry data collected by rippled. Covers all 16 OpenTelemetry spans with their 22 attributes, all StatsD metrics (gauges, counters, histograms, overlay traffic), SpanMetrics-derived Prometheus metrics, and all 8 Grafana dashboards. Includes Jaeger search guides and Prometheus query examples.
+
+➡️ **[View Data Collection Reference](./09-data-collection-reference.md)**
+
+---
+
+_This document provides a comprehensive implementation plan for integrating OpenTelemetry distributed tracing into the rippled XRP Ledger node software. For detailed information on any section, follow the links to the corresponding sub-documents._

OpenTelemetryPlan/POC_taskList.md

@@ -0,0 +1,610 @@
+# OpenTelemetry POC Task List
+
+> **Goal**: Build a minimal end-to-end proof of concept that demonstrates distributed tracing in rippled. A successful POC will show RPC request traces flowing from rippled through an OTel Collector into Jaeger, viewable in a browser UI.
+>
+> **Scope**: RPC tracing only (highest value, lowest risk per the [CRAWL phase](./06-implementation-phases.md#6102-quick-wins-immediate-value) in the implementation phases). No cross-node P2P context propagation or consensus tracing in the POC.
+
+### Related Plan Documents
+
+| Document                                                         | Relevance to POC                                                                                                                                          |
+| ---------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| [00-tracing-fundamentals.md](./00-tracing-fundamentals.md)       | Core concepts: traces, spans, context propagation, sampling                                                                                               |
+| [01-architecture-analysis.md](./01-architecture-analysis.md)     | RPC request flow (§1.5), key trace points (§1.6), instrumentation priority (§1.7)                                                                         |
+| [02-design-decisions.md](./02-design-decisions.md)               | SDK selection (§2.1), exporter config (§2.2), span naming (§2.3), attribute schema (§2.4), coexistence with PerfLog/Insight (§2.6)                        |
+| [03-implementation-strategy.md](./03-implementation-strategy.md) | Directory structure (§3.1), key principles (§3.2), performance overhead (§3.3-3.6), conditional compilation (§3.7.3), code intrusiveness (§3.9)           |
+| [04-code-samples.md](./04-code-samples.md)                       | Telemetry interface (§4.1), SpanGuard (§4.2), macros (§4.3), RPC instrumentation (§4.5.3)                                                                 |
+| [05-configuration-reference.md](./05-configuration-reference.md) | rippled config (§5.1), config parser (§5.2), Application integration (§5.3), CMake (§5.4), Collector config (§5.5), Docker Compose (§5.6), Grafana (§5.8) |
+| [06-implementation-phases.md](./06-implementation-phases.md)     | Phase 1 core tasks (§6.2), Phase 2 RPC tasks (§6.3), quick wins (§6.10), definition of done (§6.11)                                                       |
+| [07-observability-backends.md](./07-observability-backends.md)   | Jaeger dev setup (§7.1), Grafana dashboards (§7.6), alert rules (§7.6.3)                                                                                  |
+
+---
+
+## Task 0: Docker Observability Stack Setup
+
+**Objective**: Stand up the backend infrastructure to receive, store, and display traces.
+
+**What to do**:
+
+- Create `docker/telemetry/docker-compose.yml` in the repo with three services:
+  1. **OpenTelemetry Collector** (`otel/opentelemetry-collector-contrib:latest`)
+     - Expose ports `4317` (OTLP gRPC) and `4318` (OTLP HTTP)
+     - Expose port `13133` (health check)
+     - Mount a config file `docker/telemetry/otel-collector-config.yaml`
+  2. **Jaeger** (`jaegertracing/all-in-one:latest`)
+     - Expose port `16686` (UI) and `14250` (gRPC collector)
+     - Set env `COLLECTOR_OTLP_ENABLED=true`
+  3. **Grafana** (`grafana/grafana:latest`) — optional but useful
+     - Expose port `3000`
+     - Enable anonymous admin access for local dev (`GF_AUTH_ANONYMOUS_ENABLED=true`, `GF_AUTH_ANONYMOUS_ORG_ROLE=Admin`)
+     - Provision Jaeger as a data source via `docker/telemetry/grafana/provisioning/datasources/jaeger.yaml`
+
+- Create `docker/telemetry/otel-collector-config.yaml`:
+
+  ```yaml
+  receivers:
+    otlp:
+      protocols:
+        grpc:
+          endpoint: 0.0.0.0:4317
+        http:
+          endpoint: 0.0.0.0:4318
+
+  processors:
+    batch:
+      timeout: 1s
+      send_batch_size: 100
+
+  exporters:
+    logging:
+      verbosity: detailed
+    otlp/jaeger:
+      endpoint: jaeger:4317
+      tls:
+        insecure: true
+
+  service:
+    pipelines:
+      traces:
+        receivers: [otlp]
+        processors: [batch]
+        exporters: [logging, otlp/jaeger]
+  ```
+
+- Create Grafana Jaeger datasource provisioning file at `docker/telemetry/grafana/provisioning/datasources/jaeger.yaml`:
+  ```yaml
+  apiVersion: 1
+  datasources:
+    - name: Jaeger
+      type: jaeger
+      access: proxy
+      url: http://jaeger:16686
+  ```
+
+**Verification**: Run `docker compose -f docker/telemetry/docker-compose.yml up -d`, then:
+
+- `curl http://localhost:13133` returns healthy (Collector)
+- `http://localhost:16686` opens Jaeger UI (no traces yet)
+- `http://localhost:3000` opens Grafana (optional)
+
+**Reference**:
+
+- [05-configuration-reference.md §5.5](./05-configuration-reference.md) — Collector config (dev YAML with Jaeger exporter)
+- [05-configuration-reference.md §5.6](./05-configuration-reference.md) — Docker Compose development environment
+- [07-observability-backends.md §7.1](./07-observability-backends.md) — Jaeger quick start and backend selection
+- [05-configuration-reference.md §5.8](./05-configuration-reference.md) — Grafana datasource provisioning and dashboards
+
+---
+
+## Task 1: Add OpenTelemetry C++ SDK Dependency
+
+**Objective**: Make `opentelemetry-cpp` available to the build system.
+
+**What to do**:
+
+- Edit `conanfile.py` to add `opentelemetry-cpp` as an **optional** dependency. The gRPC otel plugin flag (`"grpc/*:otel_plugin": False`) in the existing conanfile may need to remain false — we pull the OTel SDK separately.
+  - Add a Conan option: `with_telemetry = [True, False]` defaulting to `False`
+  - When `with_telemetry` is `True`, add `opentelemetry-cpp` to `self.requires()`
+  - Required OTel Conan components: `opentelemetry-cpp` (which bundles api, sdk, and exporters). If the package isn't in Conan Center, consider using `FetchContent` in CMake or building from source as a fallback.
+- Edit `CMakeLists.txt`:
+  - Add option: `option(XRPL_ENABLE_TELEMETRY "Enable OpenTelemetry tracing" OFF)`
+  - When ON, `find_package(opentelemetry-cpp CONFIG REQUIRED)` and add compile definition `XRPL_ENABLE_TELEMETRY`
+  - When OFF, do nothing (zero build impact)
+- Verify the build succeeds with `-DXRPL_ENABLE_TELEMETRY=OFF` (no regressions) and with `-DXRPL_ENABLE_TELEMETRY=ON` (SDK links successfully).
+
+**Key files**:
+
+- `conanfile.py`
+- `CMakeLists.txt`
+
+**Reference**:
+
+- [05-configuration-reference.md §5.4](./05-configuration-reference.md) — CMake integration, `FindOpenTelemetry.cmake`, `XRPL_ENABLE_TELEMETRY` option
+- [03-implementation-strategy.md §3.2](./03-implementation-strategy.md) — Key principle: zero-cost when disabled via compile-time flags
+- [02-design-decisions.md §2.1](./02-design-decisions.md) — SDK selection rationale and required OTel components
+
+---
+
+## Task 2: Create Core Telemetry Interface and NullTelemetry
+
+**Objective**: Define the `Telemetry` abstract interface and a no-op implementation so the rest of the codebase can reference telemetry without hard-depending on the OTel SDK.
+
+**What to do**:
+
+- Create `include/xrpl/telemetry/Telemetry.h`:
+  - Define `namespace xrpl::telemetry`
+  - Define `struct Telemetry::Setup` holding: `enabled`, `exporterEndpoint`, `samplingRatio`, `serviceName`, `serviceVersion`, `serviceInstanceId`, `traceRpc`, `traceTransactions`, `traceConsensus`, `tracePeer`
+  - Define abstract `class Telemetry` with:
+    - `virtual void start() = 0;`
+    - `virtual void stop() = 0;`
+    - `virtual bool isEnabled() const = 0;`
+    - `virtual nostd::shared_ptr<Tracer> getTracer(string_view name = "rippled") = 0;`
+    - `virtual nostd::shared_ptr<Span> startSpan(string_view name, SpanKind kind = kInternal) = 0;`
+    - `virtual nostd::shared_ptr<Span> startSpan(string_view name, Context const& parentContext, SpanKind kind = kInternal) = 0;`
+    - `virtual bool shouldTraceRpc() const = 0;`
+    - `virtual bool shouldTraceTransactions() const = 0;`
+    - `virtual bool shouldTraceConsensus() const = 0;`
+  - Factory: `std::unique_ptr<Telemetry> make_Telemetry(Setup const&, beast::Journal);`
+  - Config parser: `Telemetry::Setup setup_Telemetry(Section const&, std::string const& nodePublicKey, std::string const& version);`
+
+- Create `include/xrpl/telemetry/SpanGuard.h`:
+  - RAII guard that takes an `nostd::shared_ptr<Span>`, creates a `Scope`, and calls `span->End()` in destructor.
+  - Convenience: `setAttribute()`, `setOk()`, `setStatus()`, `addEvent()`, `recordException()`, `context()`
+  - See [04-code-samples.md](./04-code-samples.md) §4.2 for the full implementation.
+
+- Create `src/libxrpl/telemetry/NullTelemetry.cpp`:
+  - Implements `Telemetry` with all no-ops.
+  - `isEnabled()` returns `false`, `startSpan()` returns a noop span.
+  - This is used when `XRPL_ENABLE_TELEMETRY` is OFF or `enabled=0` in config.
+
+- Guard all OTel SDK headers behind `#ifdef XRPL_ENABLE_TELEMETRY`. The `NullTelemetry` implementation should compile without the OTel SDK present.
+
+**Key new files**:
+
+- `include/xrpl/telemetry/Telemetry.h`
+- `include/xrpl/telemetry/SpanGuard.h`
+- `src/libxrpl/telemetry/NullTelemetry.cpp`
+
+**Reference**:
+
+- [04-code-samples.md §4.1](./04-code-samples.md) — Full `Telemetry` interface with `Setup` struct, lifecycle, tracer access, span creation, and component filtering methods
+- [04-code-samples.md §4.2](./04-code-samples.md) — Full `SpanGuard` RAII implementation and `NullSpanGuard` no-op class
+- [03-implementation-strategy.md §3.1](./03-implementation-strategy.md) — Directory structure: `include/xrpl/telemetry/` for headers, `src/libxrpl/telemetry/` for implementation
+- [03-implementation-strategy.md §3.7.3](./03-implementation-strategy.md) — Conditional instrumentation and zero-cost compile-time disabled pattern
+
+---
+
+## Task 3: Implement OTel-Backed Telemetry
+
+**Objective**: Implement the real `Telemetry` class that initializes the OTel SDK, configures the OTLP exporter and batch processor, and creates tracers/spans.
+
+**What to do**:
+
+- Create `src/libxrpl/telemetry/Telemetry.cpp` (compiled only when `XRPL_ENABLE_TELEMETRY=ON`):
+  - `class TelemetryImpl : public Telemetry` that:
+    - In `start()`: creates a `TracerProvider` with:
+      - Resource attributes: `service.name`, `service.version`, `service.instance.id`
+      - An `OtlpGrpcExporter` pointed at `setup.exporterEndpoint` (default `localhost:4317`)
+      - A `BatchSpanProcessor` with configurable batch size and delay
+      - A `TraceIdRatioBasedSampler` using `setup.samplingRatio`
+    - Sets the global `TracerProvider`
+    - In `stop()`: calls `ForceFlush()` then shuts down the provider
+    - In `startSpan()`: delegates to `getTracer()->StartSpan(name, ...)`
+    - `shouldTraceRpc()` etc. read from `Setup` fields
+
+- Create `src/libxrpl/telemetry/TelemetryConfig.cpp`:
+  - `setup_Telemetry()` parses the `[telemetry]` config section from `xrpld.cfg`
+  - Maps config keys: `enabled`, `exporter`, `endpoint`, `sampling_ratio`, `trace_rpc`, `trace_transactions`, `trace_consensus`, `trace_peer`
+
+- Wire `make_Telemetry()` factory:
+  - If `setup.enabled` is true AND `XRPL_ENABLE_TELEMETRY` is defined: return `TelemetryImpl`
+  - Otherwise: return `NullTelemetry`
+
+- Add telemetry source files to CMake. When `XRPL_ENABLE_TELEMETRY=ON`, compile `Telemetry.cpp` and `TelemetryConfig.cpp` and link against `opentelemetry-cpp::api`, `opentelemetry-cpp::sdk`, `opentelemetry-cpp::otlp_grpc_exporter`. When OFF, compile only `NullTelemetry.cpp`.
+
+**Key new files**:
+
+- `src/libxrpl/telemetry/Telemetry.cpp`
+- `src/libxrpl/telemetry/TelemetryConfig.cpp`
+
+**Key modified files**:
+
+- `CMakeLists.txt` (add telemetry library target)
+
+**Reference**:
+
+- [04-code-samples.md §4.1](./04-code-samples.md) — `Telemetry` interface that `TelemetryImpl` must implement
+- [05-configuration-reference.md §5.2](./05-configuration-reference.md) — `setup_Telemetry()` config parser implementation
+- [02-design-decisions.md §2.2](./02-design-decisions.md) — OTLP/gRPC exporter config (endpoint, TLS options)
+- [02-design-decisions.md §2.4.1](./02-design-decisions.md) — Resource attributes: `service.name`, `service.version`, `service.instance.id`, `xrpl.network.id`
+- [03-implementation-strategy.md §3.4](./03-implementation-strategy.md) — Per-operation CPU costs and overhead budget for span creation
+- [03-implementation-strategy.md §3.5](./03-implementation-strategy.md) — Memory overhead: static (~456 KB) and dynamic (~1.2 MB) budgets
+
+---
+
+## Task 4: Integrate Telemetry into Application Lifecycle
+
+**Objective**: Wire the `Telemetry` object into `Application` so all components can access it.
+
+**What to do**:
+
+- Edit `src/xrpld/app/main/Application.h`:
+  - Forward-declare `namespace xrpl::telemetry { class Telemetry; }`
+  - Add pure virtual method: `virtual telemetry::Telemetry& getTelemetry() = 0;`
+
+- Edit `src/xrpld/app/main/Application.cpp` (the `ApplicationImp` class):
+  - Add member: `std::unique_ptr<telemetry::Telemetry> telemetry_;`
+  - In the constructor, after config is loaded and node identity is known:
+    ```cpp
+    auto const telemetrySection = config_->section("telemetry");
+    auto telemetrySetup = telemetry::setup_Telemetry(
+        telemetrySection,
+        toBase58(TokenType::NodePublic, nodeIdentity_.publicKey()),
+        BuildInfo::getVersionString());
+    telemetry_ = telemetry::make_Telemetry(telemetrySetup, logs_->journal("Telemetry"));
+    ```
+  - In `start()`: call `telemetry_->start()` early
+  - In `stop()` or destructor: call `telemetry_->stop()` late (to flush pending spans)
+  - Implement `getTelemetry()` override: return `*telemetry_`
+
+- Add `[telemetry]` section to the example config `cfg/rippled-example.cfg`:
+  ```ini
+  # [telemetry]
+  # enabled=1
+  # endpoint=localhost:4317
+  # sampling_ratio=1.0
+  # trace_rpc=1
+  ```
+
+**Key modified files**:
+
+- `src/xrpld/app/main/Application.h`
+- `src/xrpld/app/main/Application.cpp`
+- `cfg/rippled-example.cfg` (or equivalent example config)
+
+**Reference**:
+
+- [05-configuration-reference.md §5.3](./05-configuration-reference.md) — `ApplicationImp` changes: member declaration, constructor init, `start()`/`stop()` wiring, `getTelemetry()` override
+- [05-configuration-reference.md §5.1](./05-configuration-reference.md) — `[telemetry]` config section format and all option defaults
+- [03-implementation-strategy.md §3.9.2](./03-implementation-strategy.md) — File impact assessment: `Application.cpp` ~15 lines added, ~3 changed (Low risk)
+
+---
+
+## Task 5: Create Instrumentation Macros
+
+**Objective**: Define convenience macros that make instrumenting code one-liners, and that compile to zero-cost no-ops when telemetry is disabled.
+
+**What to do**:
+
+- Create `src/xrpld/telemetry/TracingInstrumentation.h`:
+  - When `XRPL_ENABLE_TELEMETRY` is defined:
+
+    ```cpp
+    #define XRPL_TRACE_SPAN(telemetry, name) \
+        auto _xrpl_span_ = (telemetry).startSpan(name); \
+        ::xrpl::telemetry::SpanGuard _xrpl_guard_(_xrpl_span_)
+
+    #define XRPL_TRACE_RPC(telemetry, name) \
+        std::optional<::xrpl::telemetry::SpanGuard> _xrpl_guard_; \
+        if ((telemetry).shouldTraceRpc()) { \
+            _xrpl_guard_.emplace((telemetry).startSpan(name)); \
+        }
+
+    #define XRPL_TRACE_SET_ATTR(key, value) \
+        if (_xrpl_guard_.has_value()) { \
+            _xrpl_guard_->setAttribute(key, value); \
+        }
+
+    #define XRPL_TRACE_EXCEPTION(e) \
+        if (_xrpl_guard_.has_value()) { \
+            _xrpl_guard_->recordException(e); \
+        }
+    ```
+
+  - When `XRPL_ENABLE_TELEMETRY` is NOT defined, all macros expand to `((void)0)`
+
+**Key new file**:
+
+- `src/xrpld/telemetry/TracingInstrumentation.h`
+
+**Reference**:
+
+- [04-code-samples.md §4.3](./04-code-samples.md) — Full macro definitions for `XRPL_TRACE_SPAN`, `XRPL_TRACE_RPC`, `XRPL_TRACE_CONSENSUS`, `XRPL_TRACE_SET_ATTR`, `XRPL_TRACE_EXCEPTION` with both enabled and disabled branches
+- [03-implementation-strategy.md §3.7.3](./03-implementation-strategy.md) — Conditional instrumentation pattern: compile-time `#ifndef` and runtime `shouldTrace*()` checks
+- [03-implementation-strategy.md §3.9.7](./03-implementation-strategy.md) — Before/after code examples showing minimal intrusiveness (~1-3 lines per instrumentation point)
+
+---
+
+## Task 6: Instrument RPC ServerHandler
+
+**Objective**: Add tracing to the HTTP RPC entry point so every incoming RPC request creates a span.
+
+**What to do**:
+
+- Edit `src/xrpld/rpc/detail/ServerHandler.cpp`:
+  - `#include` the `TracingInstrumentation.h` header
+  - In `ServerHandler::onRequest(Session& session)`:
+    - At the top of the method, add: `XRPL_TRACE_RPC(app_.getTelemetry(), "rpc.request");`
+    - After the RPC command name is extracted, set attribute: `XRPL_TRACE_SET_ATTR("xrpl.rpc.command", command);`
+    - After the response status is known, set: `XRPL_TRACE_SET_ATTR("http.status_code", static_cast<int64_t>(statusCode));`
+    - Wrap error paths with: `XRPL_TRACE_EXCEPTION(e);`
+  - In `ServerHandler::processRequest(...)`:
+    - Add a child span: `XRPL_TRACE_RPC(app_.getTelemetry(), "rpc.process");`
+    - Set method attribute: `XRPL_TRACE_SET_ATTR("xrpl.rpc.method", request_method);`
+  - In `ServerHandler::onWSMessage(...)` (WebSocket path):
+    - Add: `XRPL_TRACE_RPC(app_.getTelemetry(), "rpc.ws.message");`
+
+- The goal is to see spans like:
+  ```
+  rpc.request
+    └── rpc.process
+  ```
+  in Jaeger for every HTTP RPC call.
+
+**Key modified file**:
+
+- `src/xrpld/rpc/detail/ServerHandler.cpp` (~15-25 lines added)
+
+**Reference**:
+
+- [04-code-samples.md §4.5.3](./04-code-samples.md) — Complete `ServerHandler::onRequest()` instrumented code sample with W3C header extraction, span creation, attribute setting, and error handling
+- [01-architecture-analysis.md §1.5](./01-architecture-analysis.md) — RPC request flow diagram: HTTP request -> attributes -> jobqueue.enqueue -> rpc.command -> response
+- [01-architecture-analysis.md §1.6](./01-architecture-analysis.md) — Key trace points table: `rpc.request` in `ServerHandler.cpp::onRequest()` (Priority: High)
+- [02-design-decisions.md §2.3](./02-design-decisions.md) — Span naming convention: `rpc.request`, `rpc.command.*`
+- [02-design-decisions.md §2.4.2](./02-design-decisions.md) — RPC span attributes: `xrpl.rpc.command`, `xrpl.rpc.version`, `xrpl.rpc.role`, `xrpl.rpc.params`
+- [03-implementation-strategy.md §3.9.2](./03-implementation-strategy.md) — File impact: `ServerHandler.cpp` ~40 lines added, ~10 changed (Low risk)
+
+---
+
+## Task 7: Instrument RPC Command Execution
+
+**Objective**: Add per-command tracing inside the RPC handler so each command (e.g., `submit`, `account_info`, `server_info`) gets its own child span.
+
+**What to do**:
+
+- Edit `src/xrpld/rpc/detail/RPCHandler.cpp`:
+  - `#include` the `TracingInstrumentation.h` header
+  - In `doCommand(RPC::JsonContext& context, Json::Value& result)`:
+    - At the top: `XRPL_TRACE_RPC(context.app.getTelemetry(), "rpc.command." + context.method);`
+    - Set attributes:
+      - `XRPL_TRACE_SET_ATTR("xrpl.rpc.command", context.method);`
+      - `XRPL_TRACE_SET_ATTR("xrpl.rpc.version", static_cast<int64_t>(context.apiVersion));`
+      - `XRPL_TRACE_SET_ATTR("xrpl.rpc.role", (context.role == Role::ADMIN) ? "admin" : "user");`
+    - On success: `XRPL_TRACE_SET_ATTR("xrpl.rpc.status", "success");`
+    - On error: `XRPL_TRACE_SET_ATTR("xrpl.rpc.status", "error");` and set the error message
+
+- After this, traces in Jaeger should look like:
+  ```
+  rpc.request  (xrpl.rpc.command=account_info)
+    └── rpc.process
+          └── rpc.command.account_info  (xrpl.rpc.version=2, xrpl.rpc.role=user, xrpl.rpc.status=success)
+  ```
+
+**Key modified file**:
+
+- `src/xrpld/rpc/detail/RPCHandler.cpp` (~15-20 lines added)
+
+**Reference**:
+
+- [04-code-samples.md §4.5.3](./04-code-samples.md) — `ServerHandler::onRequest()` code sample (includes child span pattern for `rpc.command.*`)
+- [02-design-decisions.md §2.3](./02-design-decisions.md) — Span naming: `rpc.command.*` pattern with dynamic command name (e.g., `rpc.command.server_info`)
+- [02-design-decisions.md §2.4.2](./02-design-decisions.md) — RPC attribute schema: `xrpl.rpc.command`, `xrpl.rpc.version`, `xrpl.rpc.role`, `xrpl.rpc.status`
+- [01-architecture-analysis.md §1.6](./01-architecture-analysis.md) — Key trace points table: `rpc.command.*` in `RPCHandler.cpp::doCommand()` (Priority: High)
+- [02-design-decisions.md §2.6.5](./02-design-decisions.md) — Correlation with PerfLog: how `doCommand()` can link trace_id with existing PerfLog entries
+- [03-implementation-strategy.md §3.4.4](./03-implementation-strategy.md) — RPC request overhead budget: ~1.75 μs total per request
+
+---
+
+## Task 8: Build, Run, and Verify End-to-End
+
+**Objective**: Prove the full pipeline works: rippled emits traces -> OTel Collector receives them -> Jaeger displays them.
+
+**What to do**:
+
+1. **Start the Docker stack**:
+
+   ```bash
+   docker compose -f docker/telemetry/docker-compose.yml up -d
+   ```
+
+   Verify Collector health: `curl http://localhost:13133`
+
+2. **Build rippled with telemetry**:
+
+   ```bash
+   # Adjust for your actual build workflow
+   conan install . --build=missing -o with_telemetry=True
+   cmake --preset default -DXRPL_ENABLE_TELEMETRY=ON
+   cmake --build --preset default
+   ```
+
+3. **Configure rippled**:
+   Add to `rippled.cfg` (or your local test config):
+
+   ```ini
+   [telemetry]
+   enabled=1
+   endpoint=localhost:4317
+   sampling_ratio=1.0
+   trace_rpc=1
+   ```
+
+4. **Start rippled** in standalone mode:
+
+   ```bash
+   ./rippled --conf rippled.cfg -a --start
+   ```
+
+5. **Generate RPC traffic**:
+
+   ```bash
+   # server_info
+   curl -s -X POST http://localhost:5005 \
+     -H "Content-Type: application/json" \
+     -d '{"method":"server_info","params":[{}]}'
+
+   # ledger
+   curl -s -X POST http://localhost:5005 \
+     -H "Content-Type: application/json" \
+     -d '{"method":"ledger","params":[{"ledger_index":"current"}]}'
+
+   # account_info (will error in standalone, that's fine — we trace errors too)
+   curl -s -X POST http://localhost:5005 \
+     -H "Content-Type: application/json" \
+     -d '{"method":"account_info","params":[{"account":"rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh"}]}'
+   ```
+
+6. **Verify in Jaeger**:
+   - Open `http://localhost:16686`
+   - Select service `rippled` from the dropdown
+   - Click "Find Traces"
+   - Confirm you see traces with spans: `rpc.request` -> `rpc.process` -> `rpc.command.server_info`
+   - Click into a trace and verify attributes: `xrpl.rpc.command`, `xrpl.rpc.status`, `xrpl.rpc.version`
+
+7. **Verify zero-overhead when disabled**:
+   - Rebuild with `XRPL_ENABLE_TELEMETRY=OFF`, or set `enabled=0` in config
+   - Run the same RPC calls
+   - Confirm no new traces appear and no errors in rippled logs
+
+**Verification Checklist**:
+
+- [ ] Docker stack starts without errors
+- [ ] rippled builds with `-DXRPL_ENABLE_TELEMETRY=ON`
+- [ ] rippled starts and connects to OTel Collector (check rippled logs for telemetry messages)
+- [ ] Traces appear in Jaeger UI under service "rippled"
+- [ ] Span hierarchy is correct (parent-child relationships)
+- [ ] Span attributes are populated (`xrpl.rpc.command`, `xrpl.rpc.status`, etc.)
+- [ ] Error spans show error status and message
+- [ ] Building with `XRPL_ENABLE_TELEMETRY=OFF` produces no regressions
+- [ ] Setting `enabled=0` at runtime produces no traces and no errors
+
+**Reference**:
+
+- [06-implementation-phases.md §6.11.1](./06-implementation-phases.md) — Phase 1 definition of done: SDK compiles, runtime toggle works, span creation verified in Jaeger, config validation passes
+- [06-implementation-phases.md §6.11.2](./06-implementation-phases.md) — Phase 2 definition of done: 100% RPC coverage, traceparent propagation, <1ms p99 overhead, dashboard deployed
+- [06-implementation-phases.md §6.8](./06-implementation-phases.md) — Success metrics: trace coverage >95%, CPU overhead <3%, memory <5 MB, latency impact <2%
+- [03-implementation-strategy.md §3.9.5](./03-implementation-strategy.md) — Backward compatibility: config optional, protocol unchanged, `XRPL_ENABLE_TELEMETRY=OFF` produces identical binary
+- [01-architecture-analysis.md §1.8](./01-architecture-analysis.md) — Observable outcomes: what traces, metrics, and dashboards to expect
+
+---
+
+## Task 9: Document POC Results and Next Steps
+
+**Objective**: Capture findings, screenshots, and remaining work for the team.
+
+**What to do**:
+
+- Take screenshots of Jaeger showing:
+  - The service list with "rippled"
+  - A trace with the full span tree
+  - Span detail view showing attributes
+- Document any issues encountered (build issues, SDK quirks, missing attributes)
+- Note performance observations (build time impact, any noticeable runtime overhead)
+- Write a short summary of what the POC proves and what it doesn't cover yet:
+  - **Proves**: OTel SDK integrates with rippled, OTLP export works, RPC traces visible
+  - **Doesn't cover**: Cross-node P2P context propagation, consensus tracing, protobuf trace context, W3C traceparent header extraction, tail-based sampling, production deployment
+- Outline next steps (mapping to the full plan phases):
+  - [Phase 2](./06-implementation-phases.md) completion: [W3C header extraction](./02-design-decisions.md) (§2.5), WebSocket tracing, all [RPC handlers](./01-architecture-analysis.md) (§1.6)
+  - [Phase 3](./06-implementation-phases.md): [Protobuf `TraceContext` message](./04-code-samples.md) (§4.4), [transaction relay tracing](./04-code-samples.md) (§4.5.1) across nodes
+  - [Phase 4](./06-implementation-phases.md): [Consensus round and phase tracing](./04-code-samples.md) (§4.5.2)
+  - [Phase 5](./06-implementation-phases.md): [Production collector config](./05-configuration-reference.md) (§5.5.2), [Grafana dashboards](./07-observability-backends.md) (§7.6), [alerting](./07-observability-backends.md) (§7.6.3)
+
+**Reference**:
+
+- [06-implementation-phases.md §6.1](./06-implementation-phases.md) — Full 5-phase timeline overview and Gantt chart
+- [06-implementation-phases.md §6.10](./06-implementation-phases.md) — Crawl-Walk-Run strategy: POC is the CRAWL phase, next steps are WALK and RUN
+- [06-implementation-phases.md §6.12](./06-implementation-phases.md) — Recommended implementation order (14 steps across 9 weeks)
+- [03-implementation-strategy.md §3.9](./03-implementation-strategy.md) — Code intrusiveness assessment and risk matrix for each remaining component
+- [07-observability-backends.md §7.2](./07-observability-backends.md) — Production backend selection (Tempo, Elastic APM, Honeycomb, Datadog)
+- [02-design-decisions.md §2.5](./02-design-decisions.md) — Context propagation design: W3C HTTP headers, protobuf P2P, JobQueue internal
+- [00-tracing-fundamentals.md](./00-tracing-fundamentals.md) — Reference for team onboarding on distributed tracing concepts
+
+---
+
+## Summary
+
+| Task | Description                          | New Files | Modified Files | Depends On |
+| ---- | ------------------------------------ | --------- | -------------- | ---------- |
+| 0    | Docker observability stack           | 4         | 0              | —          |
+| 1    | OTel C++ SDK dependency              | 0         | 2              | —          |
+| 2    | Core Telemetry interface + NullImpl  | 3         | 0              | 1          |
+| 3    | OTel-backed Telemetry implementation | 2         | 1              | 1, 2       |
+| 4    | Application lifecycle integration    | 0         | 3              | 2, 3       |
+| 5    | Instrumentation macros               | 1         | 0              | 2          |
+| 6    | Instrument RPC ServerHandler         | 0         | 1              | 4, 5       |
+| 7    | Instrument RPC command execution     | 0         | 1              | 4, 5       |
+| 8    | End-to-end verification              | 0         | 0              | 0-7        |
+| 9    | Document results and next steps      | 1         | 0              | 8          |
+
+**Parallel work**: Tasks 0 and 1 can run in parallel. Tasks 2 and 5 have no dependency on each other. Tasks 6 and 7 can be done in parallel once Tasks 4 and 5 are complete.
+
+---
+
+## Next Steps (Post-POC)
+
+### Metrics Pipeline for Grafana Dashboards
+
+The current POC exports **traces only**. Grafana's Explore view can query Jaeger for individual traces, but time-series charts (latency histograms, request throughput, error rates) require a **metrics pipeline**. To enable this:
+
+1. **Add a `spanmetrics` connector** to the OTel Collector config that derives RED metrics (Rate, Errors, Duration) from trace spans automatically:
+
+   ```yaml
+   connectors:
+     spanmetrics:
+       histogram:
+         explicit:
+           buckets: [1ms, 5ms, 10ms, 25ms, 50ms, 100ms, 250ms, 500ms, 1s, 5s]
+       dimensions:
+         - name: xrpl.rpc.command
+         - name: xrpl.rpc.status
+
+   exporters:
+     prometheus:
+       endpoint: 0.0.0.0:8889
+
+   service:
+     pipelines:
+       traces:
+         receivers: [otlp]
+         processors: [batch]
+         exporters: [debug, otlp/jaeger, spanmetrics]
+       metrics:
+         receivers: [spanmetrics]
+         exporters: [prometheus]
+   ```
+
+2. **Add Prometheus** to the Docker Compose stack to scrape the collector's metrics endpoint.
+
+3. **Add Prometheus as a Grafana datasource** and build dashboards for:
+   - RPC request latency (p50/p95/p99) by command
+   - RPC throughput (requests/sec) by command
+   - Error rate by command
+   - Span duration distribution
+
+### Additional Instrumentation
+
+- **W3C `traceparent` header extraction** in `ServerHandler` to support cross-service context propagation from external callers
+- **WebSocket RPC tracing** in `ServerHandler::onWSMessage()`
+- **Transaction relay tracing** across nodes using protobuf `TraceContext` messages
+- **Consensus round and phase tracing** for validator coordination visibility
+- **Ledger close tracing** to measure close-to-validated latency
+
+### Production Hardening
+
+- **Tail-based sampling** in the OTel Collector to reduce volume while retaining error/slow traces
+- **TLS configuration** for the OTLP exporter in production deployments
+- **Resource limits** on the batch processor queue to prevent unbounded memory growth
+- **Health monitoring** for the telemetry pipeline itself (collector lag, export failures)
+
+### POC Lessons Learned
+
+Issues encountered during POC implementation that inform future work:
+
+| Issue                                                                                              | Resolution                                                                    | Impact on Future Work                                            |
+| -------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------- | ---------------------------------------------------------------- |
+| Conan lockfile rejected `opentelemetry-cpp/1.18.0`                                                 | Used `--lockfile=""` to bypass                                                | Lockfile must be regenerated when adding new dependencies        |
+| Conan package only builds OTLP HTTP exporter, not gRPC                                             | Switched from gRPC to HTTP exporter (`localhost:4318/v1/traces`)              | HTTP exporter is the default; gRPC requires custom Conan profile |
+| CMake target `opentelemetry-cpp::api` etc. don't exist in Conan package                            | Use umbrella target `opentelemetry-cpp::opentelemetry-cpp`                    | Conan targets differ from upstream CMake targets                 |
+| OTel Collector `logging` exporter deprecated                                                       | Renamed to `debug` exporter                                                   | Use `debug` in all collector configs going forward               |
+| Macro parameter `telemetry` collided with `::xrpl::telemetry::` namespace                          | Renamed macro params to `_tel_obj_`, `_span_name_`                            | Avoid common words as macro parameter names                      |
+| `opentelemetry::trace::Scope` creates new context on move                                          | Store scope as member, create once in constructor                             | SpanGuard move semantics need care with Scope lifecycle          |
+| `TracerProviderFactory::Create` returns `unique_ptr<sdk::TracerProvider>`, not `nostd::shared_ptr` | Use `std::shared_ptr` member, wrap in `nostd::shared_ptr` for global provider | OTel SDK factory return types don't match API provider types     |

OpenTelemetryPlan/Phase10_taskList.md

@@ -0,0 +1,256 @@
+# Phase 10: Synthetic Workload Generation & Telemetry Validation — Task List
+
+> **Status**: Future Enhancement
+>
+> **Goal**: Build tools that generate realistic XRPL traffic to validate the full Phases 1-9 telemetry stack end-to-end — all spans, attributes, metrics, dashboards, and log-trace correlation — under controlled load.
+>
+> **Scope**: Python/shell test harness + multi-node docker-compose environment + automated validation scripts + performance benchmarks.
+>
+> **Branch**: `pratik/otel-phase10-workload-validation` (from `pratik/otel-phase9-metric-gap-fill`)
+>
+> **Depends on**: Phase 9 (internal metric gap fill) — validates the full metric surface
+
+### Related Plan Documents
+
+| Document                                                             | Relevance                                                       |
+| -------------------------------------------------------------------- | --------------------------------------------------------------- |
+| [06-implementation-phases.md](./06-implementation-phases.md)         | Phase 10 plan: motivation, architecture, exit criteria (§6.8.3) |
+| [09-data-collection-reference.md](./09-data-collection-reference.md) | Defines the full inventory of spans/metrics to validate         |
+| [Phase9_taskList.md](./Phase9_taskList.md)                           | Prerequisite — all internal metrics must be emitting            |
+
+### Why This Phase Exists
+
+Before Phases 1-9 can be considered production-ready, we need proof that:
+
+1. All 16 spans fire with correct attributes under real transaction workloads
+2. All 255+ StatsD metrics + ~50 Phase 9 metrics appear in Prometheus with non-zero values
+3. Log-trace correlation (Phase 8) produces clickable trace_id links in Loki
+4. All 10 Grafana dashboards render meaningful data (no empty panels)
+5. Performance overhead stays within bounds (< 3% CPU, < 5MB memory)
+6. The telemetry stack survives sustained load without data loss or queue backpressure
+
+---
+
+## Task 10.1: Multi-Node Test Harness
+
+**Objective**: Create a docker-compose environment with 3-5 validator nodes that produces real consensus rounds.
+
+**What to do**:
+
+- Create `docker/telemetry/docker-compose.workload.yaml`:
+  - 5 rippled validator nodes with UNL configured for each other
+  - All telemetry enabled: `[telemetry] enabled=1`, `[insight] server=otel`
+  - Full OTel stack: Collector, Jaeger, Tempo, Prometheus, Loki, Grafana
+  - Shared network with service discovery
+
+- Each node should:
+  - Generate validator keys at startup
+  - Configure all 5 nodes in its UNL
+  - Enable all trace categories including `trace_peer=1`
+  - Write logs to a file tailed by the OTel Collector filelog receiver
+
+- Include a `Makefile` target: `make telemetry-workload-up` / `make telemetry-workload-down`
+
+**Key files**:
+
+- New: `docker/telemetry/docker-compose.workload.yaml`
+- New: `docker/telemetry/workload/generate-validator-keys.sh`
+- New: `docker/telemetry/workload/xrpld-validator.cfg.template`
+
+---
+
+## Task 10.2: RPC Load Generator
+
+**Objective**: Configurable tool that fires all traced RPC commands at controlled rates.
+
+**What to do**:
+
+- Create `docker/telemetry/workload/rpc_load_generator.py`:
+  - Connects to one or more rippled WebSocket endpoints
+  - Fires all RPC commands that have trace spans: `server_info`, `ledger`, `tx`, `account_info`, `account_lines`, `fee`, `submit`, etc.
+  - Configurable parameters: rate (RPS), duration, command distribution weights
+  - Injects `traceparent` HTTP headers to test W3C context propagation
+  - Logs progress and errors to stdout
+
+- Command distribution should match realistic production ratios:
+  - 40% `server_info` / `fee` (health checks)
+  - 30% `account_info` / `account_lines` / `account_objects` (wallet queries)
+  - 15% `ledger` / `ledger_data` (explorer queries)
+  - 10% `tx` / `account_tx` (transaction lookups)
+  - 5% `book_offers` / `amm_info` (DEX queries)
+
+**Key files**:
+
+- New: `docker/telemetry/workload/rpc_load_generator.py`
+- New: `docker/telemetry/workload/requirements.txt`
+
+---
+
+## Task 10.3: Transaction Submitter
+
+**Objective**: Generate diverse transaction types to exercise `tx.*` and `ledger.*` spans.
+
+**What to do**:
+
+- Create `docker/telemetry/workload/tx_submitter.py`:
+  - Pre-funds test accounts from genesis account
+  - Submits a mix of transaction types:
+    - `Payment` (XRP and issued currencies) — exercises `tx.process`, `tx.apply`
+    - `OfferCreate` / `OfferCancel` — DEX activity
+    - `TrustSet` — trust line creation for issued currencies
+    - `NFTokenMint` / `NFTokenCreateOffer` / `NFTokenAcceptOffer` — NFT activity
+    - `EscrowCreate` / `EscrowFinish` — escrow lifecycle
+    - `AMMCreate` / `AMMDeposit` / `AMMWithdraw` — AMM pool operations (if amendment enabled)
+  - Configurable: TPS target, transaction mix weights, duration
+  - Monitors submission results and tracks success/failure rates
+
+- The transaction mix ensures the telemetry captures the full range of ledger activity that third parties care about.
+
+**Key files**:
+
+- New: `docker/telemetry/workload/tx_submitter.py`
+- New: `docker/telemetry/workload/test_accounts.json` (pre-generated keypairs)
+
+---
+
+## Task 10.4: Telemetry Validation Suite
+
+**Objective**: Automated scripts that verify all expected telemetry data exists after a workload run.
+
+**What to do**:
+
+- Create `docker/telemetry/workload/validate_telemetry.py`:
+
+  **Span validation** (queries Jaeger/Tempo API):
+  - Assert all 16 span names appear in traces
+  - Assert each span has its required attributes (22 total attributes across spans)
+  - Assert parent-child relationships are correct (`rpc.request` → `rpc.process` → `rpc.command.*`)
+  - Assert span durations are reasonable (> 0, < 60s)
+
+  **Metric validation** (queries Prometheus API):
+  - Assert all SpanMetrics-derived metrics are non-zero: `traces_span_metrics_calls_total`, `traces_span_metrics_duration_milliseconds_bucket`
+  - Assert all StatsD metrics are non-zero: `rippled_LedgerMaster_Validated_Ledger_Age`, `rippled_Peer_Finder_Active_*`, etc.
+  - Assert all Phase 9 metrics are non-zero: `rippled_nodestore_*`, `rippled_cache_*`, `rippled_txq_*`, `rippled_rpc_method_*`, `rippled_object_count`, `rippled_load_factor*`
+  - Assert metric label cardinality is within bounds
+
+  **Log-trace correlation validation** (queries Loki API):
+  - Assert logs contain `trace_id=` and `span_id=` fields
+  - Pick a random trace_id from Jaeger → query Loki for matching logs → assert results exist
+  - Assert Grafana derived field links are functional
+
+  **Dashboard validation**:
+  - For each of the 10 Grafana dashboards, query the dashboard API and assert no panels show "No data"
+
+- Output: JSON report with pass/fail per check, suitable for CI.
+
+**Key files**:
+
+- New: `docker/telemetry/workload/validate_telemetry.py`
+- New: `docker/telemetry/workload/expected_spans.json` (span inventory for validation)
+- New: `docker/telemetry/workload/expected_metrics.json` (metric inventory for validation)
+
+---
+
+## Task 10.5: Performance Benchmark Suite
+
+**Objective**: Measure CPU/memory/latency overhead of the telemetry stack.
+
+**What to do**:
+
+- Create `docker/telemetry/workload/benchmark.sh`:
+  - **Baseline run**: Start cluster with `[telemetry] enabled=0`, run transaction workload for 5 minutes, record metrics
+  - **Telemetry run**: Start cluster with full telemetry enabled, run identical workload, record metrics
+  - **Comparison**: Calculate deltas for:
+    - CPU usage (per-node average)
+    - Memory RSS (per-node peak)
+    - RPC p99 latency
+    - Transaction throughput (TPS)
+    - Consensus round time p95
+    - Ledger close time p95
+
+- Output: Markdown table comparing baseline vs. telemetry, with pass/fail against targets:
+  - CPU overhead < 3%
+  - Memory overhead < 5MB
+  - RPC latency impact < 2ms p99
+  - Throughput impact < 5%
+  - Consensus impact < 1%
+
+- Store results in `docker/telemetry/workload/benchmark-results/` for historical tracking.
+
+**Key files**:
+
+- New: `docker/telemetry/workload/benchmark.sh`
+- New: `docker/telemetry/workload/collect_system_metrics.sh`
+
+---
+
+## Task 10.6: CI Integration
+
+**Objective**: Wire the validation suite into CI for regression detection.
+
+**What to do**:
+
+- Create a CI workflow (GitHub Actions or equivalent) that:
+  1. Builds rippled with `-DXRPL_ENABLE_TELEMETRY=ON`
+  2. Starts the multi-node workload harness
+  3. Runs the RPC load generator + transaction submitter for 2 minutes
+  4. Runs the validation suite
+  5. Runs the benchmark suite
+  6. Fails the build if any validation check fails or benchmark exceeds thresholds
+  7. Archives the validation report and benchmark results as artifacts
+
+- This should be a separate workflow (not part of the main CI), triggered manually or on telemetry-related branch changes.
+
+**Key files**:
+
+- New: `.github/workflows/telemetry-validation.yml`
+- New: `docker/telemetry/workload/run-full-validation.sh` (orchestrator script)
+
+---
+
+## Task 10.7: Documentation
+
+**Objective**: Document the workload tools and validation process.
+
+**What to do**:
+
+- Create `docker/telemetry/workload/README.md`:
+  - Quick start guide for running workload harness
+  - Configuration options for load generator and tx submitter
+  - How to read validation reports
+  - How to run benchmarks and interpret results
+
+- Update `docs/telemetry-runbook.md`:
+  - Add "Validating Telemetry Stack" section
+  - Add "Performance Benchmarking" section
+
+- Update `OpenTelemetryPlan/09-data-collection-reference.md`:
+  - Add "Validation" section with expected metric/span counts
+
+---
+
+## Effort Summary
+
+| Task | Description                 | Effort | Risk   |
+| ---- | --------------------------- | ------ | ------ |
+| 10.1 | Multi-node test harness     | 2d     | Medium |
+| 10.2 | RPC load generator          | 1d     | Low    |
+| 10.3 | Transaction submitter       | 2d     | Medium |
+| 10.4 | Telemetry validation suite  | 2d     | Medium |
+| 10.5 | Performance benchmark suite | 1.5d   | Low    |
+| 10.6 | CI integration              | 1d     | Medium |
+| 10.7 | Documentation               | 0.5d   | Low    |
+
+**Total Effort**: 10 days
+
+## Exit Criteria
+
+- [ ] 5-node validator cluster starts and reaches consensus in docker-compose
+- [ ] RPC load generator fires all traced RPC commands at configurable rates
+- [ ] Transaction submitter generates 6+ transaction types at configurable TPS
+- [ ] Validation suite confirms all 16 spans, 22 attributes, 300+ metrics are present
+- [ ] Log-trace correlation validated end-to-end (Loki ↔ Tempo)
+- [ ] All 10 Grafana dashboards render data (no empty panels)
+- [ ] Benchmark shows < 3% CPU overhead, < 5MB memory overhead
+- [ ] CI workflow runs validation on telemetry branch changes
+- [ ] Validation report output is CI-parseable (JSON with exit codes)

OpenTelemetryPlan/Phase11_taskList.md

@@ -0,0 +1,471 @@
+# Phase 11: Third-Party Data Collection Pipelines — Task List
+
+> **Status**: Future Enhancement
+>
+> **Goal**: Build a custom OTel Collector receiver that periodically polls rippled's admin RPCs and exports structured metrics for external consumers — making all XRPL health, validator, peer, fee, and DEX data available as Prometheus/OTLP metrics without rippled code changes.
+>
+> **Scope**: Go-based OTel Collector receiver plugin + Grafana dashboards + Prometheus alerting rules.
+>
+> **Branch**: `pratik/otel-phase11-third-party-collection` (from `pratik/otel-phase10-workload-validation`)
+>
+> **Depends on**: Phase 10 (validation harness for testing the new receiver)
+
+### Related Plan Documents
+
+| Document                                                             | Relevance                                                       |
+| -------------------------------------------------------------------- | --------------------------------------------------------------- |
+| [06-implementation-phases.md](./06-implementation-phases.md)         | Phase 11 plan: motivation, architecture, exit criteria (§6.8.4) |
+| [09-data-collection-reference.md](./09-data-collection-reference.md) | Defines full metric inventory including third-party metrics     |
+| [Phase10_taskList.md](./Phase10_taskList.md)                         | Prerequisite — validation harness for testing                   |
+
+### Third-Party Consumer Gap Analysis
+
+This phase addresses the cross-cutting gap identified during research: **rippled has no native Prometheus/OTLP metrics export for data accessible only via RPC**. Every consumer (exchanges, payment processors, analytics providers, validators, researchers, compliance firms, custodians) must build custom JSON-RPC polling and conversion. This receiver centralizes that work.
+
+| Consumer Category          | Data Unlocked by This Phase                                        |
+| -------------------------- | ------------------------------------------------------------------ |
+| **Exchanges**              | Real-time fee estimates, TxQ capacity, server health scores        |
+| **Payment Processors**     | Settlement latency percentiles, corridor health, path availability |
+| **Analytics Providers**    | Validator metrics, network topology, amendment voting status       |
+| **DeFi / AMM**             | AMM pool TVL, DEX order book depth, trade volumes                  |
+| **Validators / Operators** | Per-peer latency, version distribution, UNL health, alerting       |
+| **Compliance**             | Transaction volume trends, network growth metrics                  |
+| **Academic Researchers**   | Consensus performance time-series, decentralization metrics        |
+| **CBDC / Tokenization**    | Token supply tracking, trust line adoption, freeze status          |
+| **Institutional Custody**  | Multi-sig status, escrow tracking, reserve calculations            |
+| **Wallet Providers**       | Server health for node selection, fee prediction data              |
+
+---
+
+## Task 11.1: OTel Collector Receiver Scaffold
+
+**Objective**: Create the Go project structure for a custom OTel Collector receiver that polls rippled JSON-RPC.
+
+**What to do**:
+
+- Create `docker/telemetry/otel-rippled-receiver/`:
+  - `receiver.go` — implements `receiver.Metrics` interface
+  - `config.go` — configuration struct (endpoint, poll interval, enabled RPCs)
+  - `factory.go` — receiver factory registration
+  - `go.mod` / `go.sum` — Go module with OTel Collector SDK dependency
+
+- Configuration model:
+
+  ```yaml
+  rippled_receiver:
+    endpoint: "http://localhost:5005" # rippled admin RPC
+    poll_interval: 30s # how often to poll
+    enabled_collectors:
+      - server_info
+      - get_counts
+      - fee
+      - peers
+      - validators
+      - feature
+      - server_state
+    amm_pools: [] # optional: AMM pool IDs to track
+    book_offers_pairs: [] # optional: currency pairs for DEX depth
+  ```
+
+- Build a custom OTel Collector binary that includes this receiver alongside the standard receivers.
+
+**Key files**:
+
+- New: `docker/telemetry/otel-rippled-receiver/receiver.go`
+- New: `docker/telemetry/otel-rippled-receiver/config.go`
+- New: `docker/telemetry/otel-rippled-receiver/factory.go`
+- New: `docker/telemetry/otel-rippled-receiver/go.mod`
+- New: `docker/telemetry/otel-rippled-receiver/Dockerfile`
+
+---
+
+## Task 11.2: server_info / server_state Collector
+
+**Objective**: Poll `server_info` and `server_state` and export all fields as OTel metrics.
+
+**What to do**:
+
+- Implement `serverInfoCollector` that calls `server_info` (admin) and extracts:
+
+  **Node Health Gauges:**
+  - `xrpl_server_state` (enum → int: disconnected=0, connected=1, syncing=2, tracking=3, full=4, proposing=5)
+  - `xrpl_server_state_duration_seconds`
+  - `xrpl_uptime_seconds`
+  - `xrpl_io_latency_ms`
+  - `xrpl_amendment_blocked` (0 or 1)
+  - `xrpl_peers_count`
+  - `xrpl_peer_disconnects_total`
+  - `xrpl_peer_disconnects_resources_total`
+  - `xrpl_jq_trans_overflow_total`
+
+  **Consensus Gauges:**
+  - `xrpl_last_close_proposers`
+  - `xrpl_last_close_converge_time_seconds`
+  - `xrpl_validation_quorum`
+
+  **Ledger Gauges:**
+  - `xrpl_validated_ledger_seq`
+  - `xrpl_validated_ledger_age_seconds`
+  - `xrpl_validated_ledger_base_fee_drops`
+  - `xrpl_validated_ledger_reserve_base_drops`
+  - `xrpl_validated_ledger_reserve_inc_drops`
+  - `xrpl_close_time_offset_seconds` (0 when absent)
+
+  **Load Factor Gauges:**
+  - `xrpl_load_factor`
+  - `xrpl_load_factor_server`
+  - `xrpl_load_factor_fee_escalation`
+  - `xrpl_load_factor_fee_queue`
+  - `xrpl_load_factor_local`
+  - `xrpl_load_factor_net`
+  - `xrpl_load_factor_cluster`
+
+  **State Accounting Gauges** (per state: disconnected, connected, syncing, tracking, full):
+  - `xrpl_state_duration_seconds{state="<name>"}`
+  - `xrpl_state_transitions_total{state="<name>"}`
+
+  **Validator Info** (when node is a validator):
+  - `xrpl_validator_list_count`
+  - `xrpl_validator_list_expiration_seconds` (epoch)
+  - `xrpl_validator_list_active` (0 or 1)
+
+**Key files**:
+
+- New: `docker/telemetry/otel-rippled-receiver/collectors/server_info.go`
+
+---
+
+## Task 11.3: get_counts Collector
+
+**Objective**: Poll `get_counts` and export internal object counts and NodeStore stats.
+
+**What to do**:
+
+- Implement `getCountsCollector`:
+
+  **Database Gauges:**
+  - `xrpl_db_size_kb{db="total"}`, `xrpl_db_size_kb{db="ledger"}`, `xrpl_db_size_kb{db="transaction"}`
+
+  **NodeStore Gauges:**
+  - `xrpl_nodestore_reads_total`, `xrpl_nodestore_reads_hit`, `xrpl_nodestore_writes_total`
+  - `xrpl_nodestore_read_bytes`, `xrpl_nodestore_written_bytes`
+  - `xrpl_nodestore_read_duration_us`, `xrpl_nodestore_write_load`
+  - `xrpl_nodestore_read_queue`, `xrpl_nodestore_read_threads_running`
+
+  **Cache Gauges:**
+  - `xrpl_cache_hit_rate{cache="SLE"}`, `xrpl_cache_hit_rate{cache="ledger"}`, `xrpl_cache_hit_rate{cache="accepted_ledger"}`
+  - `xrpl_cache_size{cache="treenode"}`, `xrpl_cache_size{cache="fullbelow"}`, `xrpl_cache_size{cache="accepted_ledger"}`
+
+  **Object Count Gauges:**
+  - `xrpl_object_count{type="<name>"}` for each counted object type (Transaction, Ledger, NodeObject, STTx, STLedgerEntry, InboundLedger, Pathfinder, etc.)
+
+  **Rates:**
+  - `xrpl_historical_fetch_per_minute`
+  - `xrpl_local_txs`
+
+**Key files**:
+
+- New: `docker/telemetry/otel-rippled-receiver/collectors/get_counts.go`
+
+---
+
+## Task 11.4: Peer Topology Collector
+
+**Objective**: Poll `peers` and export per-peer and aggregate network metrics.
+
+**What to do**:
+
+- Implement `peersCollector`:
+
+  **Aggregate Gauges:**
+  - `xrpl_peers_inbound_count`
+  - `xrpl_peers_outbound_count`
+  - `xrpl_peers_cluster_count`
+
+  **Per-Peer Gauges** (with labels `peer_key` truncated to 8 chars for cardinality control):
+  - `xrpl_peer_latency_ms{peer="<key>", version="<ver>", inbound="<bool>"}`
+  - `xrpl_peer_uptime_seconds{peer="<key>"}`
+  - `xrpl_peer_load{peer="<key>"}`
+
+  **Distribution Gauges** (aggregated across all peers):
+  - `xrpl_peer_latency_p50_ms`, `xrpl_peer_latency_p95_ms`, `xrpl_peer_latency_p99_ms`
+  - `xrpl_peer_version_count{version="<semver>"}` — count of peers per software version
+
+  **Tracking Status:**
+  - `xrpl_peer_diverged_count` — peers with `track=diverged`
+  - `xrpl_peer_unknown_count` — peers with `track=unknown`
+
+**Key files**:
+
+- New: `docker/telemetry/otel-rippled-receiver/collectors/peers.go`
+
+**Cardinality note**: Per-peer metrics use truncated keys. For large peer sets (50+), the aggregate distribution gauges are preferred over per-peer labels.
+
+---
+
+## Task 11.5: Validator & Amendment Collector
+
+**Objective**: Poll `validators` and `feature` to export validator health and amendment voting status.
+
+**What to do**:
+
+- Implement `validatorCollector`:
+
+  **From `validators` RPC:**
+  - `xrpl_trusted_validators_count`
+  - `xrpl_validator_signing` (0 or 1 — whether local validator is signing)
+
+  **From `feature` RPC:**
+  - `xrpl_amendment_enabled_count` — total enabled amendments
+  - `xrpl_amendment_majority_count` — amendments with majority but not yet enabled
+  - `xrpl_amendment_vetoed_count` — locally vetoed amendments
+  - `xrpl_amendment_unsupported_majority` (0 or 1) — any unsupported amendment has majority (critical alert)
+
+  **Per-amendment with majority** (limited cardinality — only amendments with `majority` set):
+  - `xrpl_amendment_majority_time{name="<amendment>"}` — epoch time when majority was gained
+  - `xrpl_amendment_votes{name="<amendment>"}` — current vote count
+  - `xrpl_amendment_threshold{name="<amendment>"}` — votes needed
+
+**Key files**:
+
+- New: `docker/telemetry/otel-rippled-receiver/collectors/validators.go`
+
+---
+
+## Task 11.6: Fee & TxQ Collector
+
+**Objective**: Poll `fee` RPC and export real-time fee market data.
+
+**What to do**:
+
+- Implement `feeCollector` that calls the public `fee` RPC:
+
+  **Fee Level Gauges:**
+  - `xrpl_fee_current_ledger_size` — transactions in current open ledger
+  - `xrpl_fee_expected_ledger_size` — expected transactions at close
+  - `xrpl_fee_max_queue_size` — maximum transaction queue size
+  - `xrpl_fee_open_ledger_fee_drops` — minimum fee for open ledger inclusion
+  - `xrpl_fee_median_fee_drops` — median fee level
+  - `xrpl_fee_minimum_fee_drops` — base reference fee
+  - `xrpl_fee_queue_size` — current queue depth
+
+- This overlaps with Phase 9's internal TxQ metrics but provides an external-only collection path that doesn't require rippled code changes.
+
+**Key files**:
+
+- New: `docker/telemetry/otel-rippled-receiver/collectors/fee.go`
+
+---
+
+## Task 11.7: DEX & AMM Collector (Optional)
+
+**Objective**: Periodically poll configured AMM pools and order book pairs for DeFi metrics.
+
+**What to do**:
+
+- Implement `dexCollector` (enabled only when `amm_pools` or `book_offers_pairs` are configured):
+
+  **AMM Pool Gauges** (per configured pool):
+  - `xrpl_amm_reserve{pool="<id>", asset="<currency>"}` — pool reserve amount
+  - `xrpl_amm_lp_token_supply{pool="<id>"}` — outstanding LP tokens
+  - `xrpl_amm_trading_fee{pool="<id>"}` — pool trading fee (basis points)
+  - `xrpl_amm_tvl_drops{pool="<id>"}` — total value locked (XRP-denominated)
+
+  **Order Book Gauges** (per configured pair):
+  - `xrpl_orderbook_bid_depth{pair="<base>/<quote>"}` — total bid volume
+  - `xrpl_orderbook_ask_depth{pair="<base>/<quote>"}` — total ask volume
+  - `xrpl_orderbook_spread{pair="<base>/<quote>"}` — best bid-ask spread
+  - `xrpl_orderbook_offer_count{pair="<base>/<quote>", side="bid|ask"}` — number of offers
+
+**Key files**:
+
+- New: `docker/telemetry/otel-rippled-receiver/collectors/dex.go`
+
+**Note**: This is optional because it requires explicit configuration of which pools/pairs to track. Default configuration tracks no DEX data.
+
+---
+
+## Task 11.8: Prometheus Alerting Rules
+
+**Objective**: Create production-ready alerting rules for the metrics exported by this receiver.
+
+**What to do**:
+
+- Create `docker/telemetry/prometheus/rippled-alerts.yml`:
+
+  **Tier 1 — Critical (page immediately):**
+
+  ```yaml
+  - alert: XRPLServerNotFull
+    expr: xrpl_server_state < 4
+    for: 15m
+
+  - alert: XRPLAmendmentBlocked
+    expr: xrpl_amendment_blocked == 1
+    for: 1m
+
+  - alert: XRPLNoPeers
+    expr: xrpl_peers_count == 0
+    for: 5m
+
+  - alert: XRPLLedgerStale
+    expr: xrpl_validated_ledger_age_seconds > 120
+    for: 2m
+
+  - alert: XRPLHighIOLatency
+    expr: xrpl_io_latency_ms > 100
+    for: 5m
+
+  - alert: XRPLUnsupportedAmendmentMajority
+    expr: xrpl_amendment_unsupported_majority == 1
+    for: 1m
+  ```
+
+  **Tier 2 — Warning (investigate within hours):**
+
+  ```yaml
+  - alert: XRPLLowPeerCount
+    expr: xrpl_peers_count < 10
+    for: 15m
+
+  - alert: XRPLHighLoadFactor
+    expr: xrpl_load_factor > 10
+    for: 10m
+
+  - alert: XRPLSlowConsensus
+    expr: xrpl_last_close_converge_time_seconds > 6
+    for: 5m
+
+  - alert: XRPLValidatorListExpiring
+    expr: (xrpl_validator_list_expiration_seconds - time()) < 86400
+    for: 1h
+
+  - alert: XRPLClockDrift
+    expr: xrpl_close_time_offset_seconds > 0
+    for: 5m
+
+  - alert: XRPLStateFlapping
+    expr: rate(xrpl_state_transitions_total{state="full"}[1h]) > 2
+    for: 30m
+  ```
+
+**Key files**:
+
+- New: `docker/telemetry/prometheus/rippled-alerts.yml`
+- Update: `docker/telemetry/prometheus/prometheus.yml` (add rule_files reference)
+
+---
+
+## Task 11.9: New Grafana Dashboards
+
+**Objective**: Create 4 new dashboards for the data exported by the receiver.
+
+**What to do**:
+
+- **Validator Health** (`rippled-validator-health`):
+  - Server state timeline, state duration breakdown
+  - Proposer count trend, converge time trend, validation quorum
+  - Validator list expiration countdown
+  - Amendment voting status (majority/enabled/vetoed)
+
+- **Network Topology** (`rippled-network-topology`):
+  - Peer count (inbound/outbound/cluster), peer version distribution
+  - Peer latency distribution (p50/p95/p99), diverged peer count
+  - Geographic distribution (if enriched with GeoIP)
+  - Peer uptime distribution
+
+- **Fee Market** (`rippled-fee-market-external`):
+  - Current fee levels (open ledger, median, minimum), fee escalation timeline
+  - Queue depth vs. capacity, transactions per ledger
+  - Load factor breakdown (server/network/cluster/escalation)
+
+- **DEX & AMM Overview** (`rippled-dex-amm`) (only populated when DEX collectors are configured):
+  - AMM pool TVL, reserve ratios, LP token supply
+  - Order book depth per pair, spread trends
+  - Trading fee revenue estimates
+
+**Key files**:
+
+- New: `docker/telemetry/grafana/dashboards/rippled-validator-health.json`
+- New: `docker/telemetry/grafana/dashboards/rippled-network-topology.json`
+- New: `docker/telemetry/grafana/dashboards/rippled-fee-market-external.json`
+- New: `docker/telemetry/grafana/dashboards/rippled-dex-amm.json`
+
+---
+
+## Task 11.10: Integration with Phase 10 Validation
+
+**Objective**: Extend the Phase 10 validation suite to verify this receiver's metrics.
+
+**What to do**:
+
+- Update `docker/telemetry/workload/validate_telemetry.py`:
+  - Add assertions for all `xrpl_*` metrics produced by the receiver
+  - Verify metric labels have expected values
+  - Verify alerting rules fire correctly (inject a "bad" state and check alert)
+
+- Update `docker/telemetry/docker-compose.workload.yaml`:
+  - Add the custom OTel Collector build with the rippled receiver
+  - Configure the receiver to poll one of the test nodes
+
+**Key files**:
+
+- Update: `docker/telemetry/workload/validate_telemetry.py`
+- Update: `docker/telemetry/docker-compose.workload.yaml`
+- Update: `docker/telemetry/workload/expected_metrics.json`
+
+---
+
+## Task 11.11: Documentation
+
+**Objective**: Document the receiver, its metrics, deployment, and alerting.
+
+**What to do**:
+
+- Create `docker/telemetry/otel-rippled-receiver/README.md`:
+  - Architecture overview (how the receiver fits into the OTel Collector)
+  - Configuration reference (all config options with defaults)
+  - Metric reference table (all exported metrics with types and labels)
+  - Deployment guide (building custom collector binary, docker-compose integration)
+
+- Update `OpenTelemetryPlan/09-data-collection-reference.md`:
+  - Add "Third-Party Metrics (OTel Collector Receiver)" section
+  - Add new Grafana dashboard reference (4 dashboards)
+  - Add alerting rules reference
+
+- Update `docs/telemetry-runbook.md`:
+  - Add "Third-Party Metrics Receiver" troubleshooting section
+  - Add alerting playbook (what to do for each Tier 1/Tier 2 alert)
+
+---
+
+## Effort Summary
+
+| Task  | Description                          | Effort | Risk   |
+| ----- | ------------------------------------ | ------ | ------ |
+| 11.1  | OTel Collector receiver scaffold     | 1.5d   | Medium |
+| 11.2  | server_info / server_state collector | 2d     | Low    |
+| 11.3  | get_counts collector                 | 1.5d   | Low    |
+| 11.4  | Peer topology collector              | 1.5d   | Medium |
+| 11.5  | Validator & amendment collector      | 1d     | Low    |
+| 11.6  | Fee & TxQ collector                  | 0.5d   | Low    |
+| 11.7  | DEX & AMM collector (optional)       | 1.5d   | Medium |
+| 11.8  | Prometheus alerting rules            | 1d     | Low    |
+| 11.9  | New Grafana dashboards (4)           | 2d     | Low    |
+| 11.10 | Integration with Phase 10 validation | 1d     | Low    |
+| 11.11 | Documentation                        | 1d     | Low    |
+
+**Total Effort**: 15 days
+
+## Exit Criteria
+
+- [ ] Custom OTel Collector receiver builds and starts without errors
+- [ ] All `xrpl_*` metrics from server_info, get_counts, peers, validators, fee appear in Prometheus
+- [ ] Metrics update at configured poll interval (default 30s)
+- [ ] 4 new Grafana dashboards operational with data
+- [ ] Prometheus alerting rules fire correctly for simulated failure conditions
+- [ ] DEX/AMM collector works when configured (optional — not required for base exit criteria)
+- [ ] Phase 10 validation suite passes with receiver metrics included
+- [ ] Receiver handles rippled restart/unavailability gracefully (no crash, logs warning, retries)
+- [ ] Documentation complete: receiver README, metric reference, alerting playbook
+- [ ] Go receiver has unit tests with >80% coverage

OpenTelemetryPlan/Phase2_taskList.md

@@ -0,0 +1,220 @@
+# Phase 2: RPC Tracing Completion Task List
+
+> **Goal**: Complete full RPC tracing coverage with W3C Trace Context propagation, unit tests, and performance validation. Build on the POC foundation to achieve production-quality RPC observability.
+>
+> **Scope**: W3C header extraction, TraceContext propagation utilities, unit tests for core telemetry, integration tests for RPC tracing, and performance benchmarks.
+>
+> **Branch**: `pratik/otel-phase2-rpc-tracing` (from `pratik/OpenTelemetry_and_DistributedTracing_planning`)
+
+### Related Plan Documents
+
+| Document                                                     | Relevance                                                     |
+| ------------------------------------------------------------ | ------------------------------------------------------------- |
+| [04-code-samples.md](./04-code-samples.md)                   | TraceContextPropagator (§4.4.2), RPC instrumentation (§4.5.3) |
+| [02-design-decisions.md](./02-design-decisions.md)           | W3C Trace Context (§2.5), span attributes (§2.4.2)            |
+| [06-implementation-phases.md](./06-implementation-phases.md) | Phase 2 tasks (§6.3), definition of done (§6.11.2)            |
+
+---
+
+## Task 2.1: Implement W3C Trace Context HTTP Header Extraction
+
+**Objective**: Extract `traceparent` and `tracestate` headers from incoming HTTP RPC requests so external callers can propagate their trace context into rippled.
+
+**What to do**:
+
+- Create `include/xrpl/telemetry/TraceContextPropagator.h`:
+  - `extractFromHeaders(headerGetter)` - extract W3C traceparent/tracestate from HTTP headers
+  - `injectToHeaders(ctx, headerSetter)` - inject trace context into response headers
+  - Use OTel's `TextMapPropagator` with `W3CTraceContextPropagator` for standards compliance
+  - Only compiled when `XRPL_ENABLE_TELEMETRY` is defined
+
+- Create `src/libxrpl/telemetry/TraceContextPropagator.cpp`:
+  - Implement a simple `TextMapCarrier` adapter for HTTP headers
+  - Use `opentelemetry::context::propagation::GlobalTextMapPropagator` for extraction/injection
+  - Register the W3C propagator in `TelemetryImpl::start()`
+
+- Modify `src/xrpld/rpc/detail/ServerHandler.cpp`:
+  - In the HTTP request handler, extract parent context from headers before creating span
+  - Pass extracted context to `startSpan()` as parent
+  - Inject trace context into response headers
+
+**Key new files**:
+
+- `include/xrpl/telemetry/TraceContextPropagator.h`
+- `src/libxrpl/telemetry/TraceContextPropagator.cpp`
+
+**Key modified files**:
+
+- `src/xrpld/rpc/detail/ServerHandler.cpp`
+- `src/libxrpl/telemetry/Telemetry.cpp` (register W3C propagator)
+
+**Reference**:
+
+- [04-code-samples.md §4.4.2](./04-code-samples.md) — TraceContextPropagator with extractFromHeaders/injectToHeaders
+- [02-design-decisions.md §2.5](./02-design-decisions.md) — W3C Trace Context propagation design
+
+---
+
+## Task 2.2: Add XRPL_TRACE_PEER Macro
+
+**Objective**: Add the missing peer-tracing macro for future Phase 3 use and ensure macro completeness.
+
+**What to do**:
+
+- Edit `src/xrpld/telemetry/TracingInstrumentation.h`:
+  - Add `XRPL_TRACE_PEER(_tel_obj_, _span_name_)` macro that checks `shouldTracePeer()`
+  - Add `XRPL_TRACE_LEDGER(_tel_obj_, _span_name_)` macro (for future ledger tracing)
+  - Ensure disabled variants expand to `((void)0)`
+
+**Key modified file**:
+
+- `src/xrpld/telemetry/TracingInstrumentation.h`
+
+---
+
+## Task 2.3: Add shouldTraceLedger() to Telemetry Interface
+
+**Objective**: The `Setup` struct has a `traceLedger` field but there's no corresponding virtual method. Add it for interface completeness.
+
+**What to do**:
+
+- Edit `include/xrpl/telemetry/Telemetry.h`:
+  - Add `virtual bool shouldTraceLedger() const = 0;`
+
+- Update all implementations:
+  - `src/libxrpl/telemetry/Telemetry.cpp` (TelemetryImpl, NullTelemetryOtel)
+  - `src/libxrpl/telemetry/NullTelemetry.cpp` (NullTelemetry)
+
+**Key modified files**:
+
+- `include/xrpl/telemetry/Telemetry.h`
+- `src/libxrpl/telemetry/Telemetry.cpp`
+- `src/libxrpl/telemetry/NullTelemetry.cpp`
+
+---
+
+## Task 2.4: Unit Tests for Core Telemetry Infrastructure
+
+**Objective**: Add unit tests for the core telemetry abstractions to validate correctness and catch regressions.
+
+**What to do**:
+
+- Create `src/test/telemetry/Telemetry_test.cpp`:
+  - Test NullTelemetry: verify all methods return expected no-op values
+  - Test Setup defaults: verify all Setup fields have correct defaults
+  - Test setup_Telemetry config parser: verify parsing of [telemetry] section
+  - Test enabled/disabled factory paths
+  - Test shouldTrace\* methods respect config flags
+
+- Create `src/test/telemetry/SpanGuard_test.cpp`:
+  - Test SpanGuard RAII lifecycle (span ends on destruction)
+  - Test move constructor works correctly
+  - Test setAttribute, setOk, setStatus, addEvent, recordException
+  - Test context() returns valid context
+
+- Add test files to CMake build
+
+**Key new files**:
+
+- `src/test/telemetry/Telemetry_test.cpp`
+- `src/test/telemetry/SpanGuard_test.cpp`
+
+**Reference**:
+
+- [06-implementation-phases.md §6.11.1](./06-implementation-phases.md) — Phase 1 exit criteria (unit tests passing)
+
+---
+
+## Task 2.5: Enhance RPC Span Attributes
+
+**Objective**: Add additional attributes to RPC spans per the semantic conventions defined in the plan.
+
+**What to do**:
+
+- Edit `src/xrpld/rpc/detail/ServerHandler.cpp`:
+  - Add `http.method` attribute for HTTP requests
+  - Add `http.status_code` attribute for responses
+  - Add `net.peer.ip` attribute for client IP (if available)
+
+- Edit `src/xrpld/rpc/detail/RPCHandler.cpp`:
+  - Add `xrpl.rpc.duration_ms` attribute on completion
+  - Add error message attribute on failure: `xrpl.rpc.error_message`
+
+**Key modified files**:
+
+- `src/xrpld/rpc/detail/ServerHandler.cpp`
+- `src/xrpld/rpc/detail/RPCHandler.cpp`
+
+**Reference**:
+
+- [02-design-decisions.md §2.4.2](./02-design-decisions.md) — RPC attribute schema
+
+---
+
+## Task 2.6: Build Verification and Performance Baseline
+
+**Objective**: Verify the build succeeds with and without telemetry, and establish a performance baseline.
+
+**What to do**:
+
+1. Build with `telemetry=ON` and verify no compilation errors
+2. Build with `telemetry=OFF` and verify no regressions
+3. Run existing unit tests to verify no breakage
+4. Document any build issues in lessons.md
+
+**Verification Checklist**:
+
+- [ ] `conan install . --build=missing -o telemetry=True` succeeds
+- [ ] `cmake --preset default -Dtelemetry=ON` configures correctly
+- [ ] Build succeeds with telemetry ON
+- [ ] Build succeeds with telemetry OFF
+- [ ] Existing tests pass with telemetry ON
+- [ ] Existing tests pass with telemetry OFF
+
+---
+
+## Summary
+
+| Task | Description                                 | New Files | Modified Files | Depends On |
+| ---- | ------------------------------------------- | --------- | -------------- | ---------- |
+| 2.1  | W3C Trace Context header extraction         | 2         | 2              | POC        |
+| 2.2  | Add XRPL_TRACE_PEER/LEDGER macros           | 0         | 1              | POC        |
+| 2.3  | Add shouldTraceLedger() interface method    | 0         | 3              | POC        |
+| 2.4  | Unit tests for core telemetry               | 2         | 1              | POC        |
+| 2.5  | Enhanced RPC span attributes                | 0         | 2              | POC        |
+| 2.6  | Build verification and performance baseline | 0         | 0              | 2.1-2.5    |
+
+**Parallel work**: Tasks 2.1, 2.2, 2.3 can run in parallel. Task 2.4 depends on 2.3. Task 2.5 can run in parallel with 2.4. Task 2.6 depends on all others.
+
+---
+
+## Known Issues / Future Work
+
+### Thread safety of TelemetryImpl::stop() vs startSpan()
+
+`TelemetryImpl::stop()` resets `sdkProvider_` (a `std::shared_ptr`) without
+synchronization. `getTracer()` reads the same member from RPC handler threads.
+This is a data race if any thread calls `startSpan()` concurrently with `stop()`.
+
+**Current mitigation**: `Application::stop()` shuts down `serverHandler_`,
+`overlay_`, and `jobQueue_` before calling `telemetry_->stop()`, so no callers
+remain. See comments in `Telemetry.cpp:stop()` and `Application.cpp`.
+
+**TODO**: Add an `std::atomic<bool> stopped_` flag checked in `getTracer()` to
+make this robust against future shutdown order changes.
+
+### Macro incompatibility: XRPL_TRACE_SPAN vs XRPL_TRACE_SET_ATTR
+
+`XRPL_TRACE_SPAN` and `XRPL_TRACE_SPAN_KIND` declare `_xrpl_guard_` as a bare
+`SpanGuard`, but `XRPL_TRACE_SET_ATTR` and `XRPL_TRACE_EXCEPTION` call
+`_xrpl_guard_.has_value()` which requires `std::optional<SpanGuard>`. Using
+`XRPL_TRACE_SPAN` followed by `XRPL_TRACE_SET_ATTR` in the same scope would
+fail to compile.
+
+**Current mitigation**: No call site currently uses `XRPL_TRACE_SPAN` — all
+production code uses the conditional macros (`XRPL_TRACE_RPC`, `XRPL_TRACE_TX`,
+etc.) which correctly wrap the guard in `std::optional`.
+
+**TODO**: Either make `XRPL_TRACE_SPAN`/`XRPL_TRACE_SPAN_KIND` also wrap in
+`std::optional`, or document that `XRPL_TRACE_SET_ATTR` is only compatible with
+the conditional macros.

OpenTelemetryPlan/Phase3_taskList.md

@@ -0,0 +1,263 @@
+# Phase 3: Transaction Tracing Task List
+
+> **Goal**: Trace the full transaction lifecycle from RPC submission through peer relay, including cross-node context propagation via Protocol Buffer extensions. This is the WALK phase that demonstrates true distributed tracing.
+>
+> **Scope**: Protocol Buffer `TraceContext` message, context serialization, PeerImp transaction instrumentation, NetworkOPs processing instrumentation, HashRouter visibility, and multi-node relay context propagation.
+>
+> **Branch**: `pratik/otel-phase3-tx-tracing` (from `pratik/otel-phase2-rpc-tracing`)
+
+### Related Plan Documents
+
+| Document                                                     | Relevance                                                                                        |
+| ------------------------------------------------------------ | ------------------------------------------------------------------------------------------------ |
+| [04-code-samples.md](./04-code-samples.md)                   | TraceContext protobuf (§4.4.1), PeerImp instrumentation (§4.5.1), context serialization (§4.4.2) |
+| [01-architecture-analysis.md](./01-architecture-analysis.md) | Transaction flow (§1.3), key trace points (§1.6)                                                 |
+| [06-implementation-phases.md](./06-implementation-phases.md) | Phase 3 tasks (§6.4), definition of done (§6.11.3)                                               |
+| [02-design-decisions.md](./02-design-decisions.md)           | Context propagation design (§2.5), attribute schema (§2.4.3)                                     |
+
+---
+
+## Task 3.1: Define TraceContext Protocol Buffer Message
+
+**Objective**: Add trace context fields to the P2P protocol messages so trace IDs can propagate across nodes.
+
+**What to do**:
+
+- Edit `include/xrpl/proto/xrpl.proto` (or `src/ripple/proto/ripple.proto`, wherever the proto is):
+  - Add `TraceContext` message definition:
+    ```protobuf
+    message TraceContext {
+        bytes trace_id = 1;      // 16-byte trace identifier
+        bytes span_id = 2;       // 8-byte span identifier
+        uint32 trace_flags = 3;  // bit 0 = sampled
+        string trace_state = 4;  // W3C tracestate value
+    }
+    ```
+  - Add `optional TraceContext trace_context = 1001;` to:
+    - `TMTransaction`
+    - `TMProposeSet` (for Phase 4 use)
+    - `TMValidation` (for Phase 4 use)
+  - Use high field numbers (1001+) to avoid conflicts with existing fields
+
+- Regenerate protobuf C++ code
+
+**Key modified files**:
+
+- `include/xrpl/proto/xrpl.proto` (or equivalent)
+
+**Reference**:
+
+- [04-code-samples.md §4.4.1](./04-code-samples.md) — TraceContext message definition
+- [02-design-decisions.md §2.5.2](./02-design-decisions.md) — Protocol buffer context propagation design
+
+---
+
+## Task 3.2: Implement Protobuf Context Serialization
+
+**Objective**: Create utilities to serialize/deserialize OTel trace context to/from protobuf `TraceContext` messages.
+
+**What to do**:
+
+- Create `include/xrpl/telemetry/TraceContextPropagator.h` (extend from Phase 2 if exists, or add protobuf methods):
+  - Add protobuf-specific methods:
+    - `static Context extractFromProtobuf(protocol::TraceContext const& proto)` — reconstruct OTel context from protobuf fields
+    - `static void injectToProtobuf(Context const& ctx, protocol::TraceContext& proto)` — serialize current span context into protobuf fields
+  - Both methods guard behind `#ifdef XRPL_ENABLE_TELEMETRY`
+
+- Create/extend `src/libxrpl/telemetry/TraceContextPropagator.cpp`:
+  - Implement extraction: read trace_id (16 bytes), span_id (8 bytes), trace_flags from protobuf, construct `SpanContext`, wrap in `Context`
+  - Implement injection: get current span from context, serialize its TraceId, SpanId, and TraceFlags into protobuf fields
+
+**Key new/modified files**:
+
+- `include/xrpl/telemetry/TraceContextPropagator.h`
+- `src/libxrpl/telemetry/TraceContextPropagator.cpp`
+
+**Reference**:
+
+- [04-code-samples.md §4.4.2](./04-code-samples.md) — Full extract/inject implementation
+
+---
+
+## Task 3.3: Instrument PeerImp Transaction Handling
+
+**Objective**: Add trace spans to the peer-level transaction receive and relay path.
+
+**What to do**:
+
+- Edit `src/xrpld/overlay/detail/PeerImp.cpp`:
+  - In `onMessage(TMTransaction)` / `handleTransaction()`:
+    - Extract parent trace context from incoming `TMTransaction::trace_context` field (if present)
+    - Create `tx.receive` span as child of extracted context (or new root if none)
+    - Set attributes: `xrpl.tx.hash`, `xrpl.peer.id`, `xrpl.tx.status`
+    - On HashRouter suppression (duplicate): set `xrpl.tx.suppressed=true`, add `tx.duplicate` event
+    - Wrap validation call with child span `tx.validate`
+    - Wrap relay with `tx.relay` span
+  - When relaying to peers:
+    - Inject current trace context into outgoing `TMTransaction::trace_context`
+    - Set `xrpl.tx.relay_count` attribute
+
+- Include `TracingInstrumentation.h` and use `XRPL_TRACE_TX` macro
+
+**Key modified files**:
+
+- `src/xrpld/overlay/detail/PeerImp.cpp`
+
+**Reference**:
+
+- [04-code-samples.md §4.5.1](./04-code-samples.md) — Full PeerImp instrumentation example
+- [01-architecture-analysis.md §1.3](./01-architecture-analysis.md) — Transaction flow diagram
+- [01-architecture-analysis.md §1.6](./01-architecture-analysis.md) — tx.receive trace point
+
+---
+
+## Task 3.4: Instrument NetworkOPs Transaction Processing
+
+**Objective**: Trace the transaction processing pipeline in NetworkOPs, covering both sync and async paths.
+
+**What to do**:
+
+- Edit `src/xrpld/app/misc/NetworkOPs.cpp`:
+  - In `processTransaction()`:
+    - Create `tx.process` span
+    - Set attributes: `xrpl.tx.hash`, `xrpl.tx.type`, `xrpl.tx.local` (whether from RPC or peer)
+    - Record whether sync or async path is taken
+
+  - In `doTransactionAsync()`:
+    - Capture parent context before queuing
+    - Create `tx.queue` span with queue depth attribute
+    - Add event when transaction is dequeued for processing
+
+  - In `doTransactionSync()`:
+    - Create `tx.process_sync` span
+    - Record result (applied, queued, rejected)
+
+**Key modified files**:
+
+- `src/xrpld/app/misc/NetworkOPs.cpp`
+
+**Reference**:
+
+- [01-architecture-analysis.md §1.6](./01-architecture-analysis.md) — tx.validate and tx.process trace points
+- [02-design-decisions.md §2.4.3](./02-design-decisions.md) — Transaction attribute schema
+
+---
+
+## Task 3.5: Instrument HashRouter for Dedup Visibility
+
+**Objective**: Make transaction deduplication visible in traces by recording HashRouter decisions as span attributes/events.
+
+**What to do**:
+
+- Edit `src/xrpld/overlay/detail/PeerImp.cpp` (in handleTransaction):
+  - After calling `HashRouter::shouldProcess()` or `addSuppressionPeer()`:
+    - Record `xrpl.tx.suppressed` attribute (true/false)
+    - Record `xrpl.tx.flags` showing current HashRouter state (SAVED, TRUSTED, etc.)
+    - Add `tx.first_seen` or `tx.duplicate` event
+
+- This is NOT a modification to HashRouter itself — just recording its decisions as span attributes in the existing PeerImp instrumentation from Task 3.3.
+
+**Key modified files**:
+
+- `src/xrpld/overlay/detail/PeerImp.cpp` (same changes as 3.3, logically grouped)
+
+---
+
+## Task 3.6: Context Propagation in Transaction Relay
+
+**Objective**: Ensure trace context flows correctly when transactions are relayed between peers, creating linked spans across nodes.
+
+**What to do**:
+
+- Verify the relay path injects trace context:
+  - When `PeerImp` relays a transaction, the `TMTransaction` message should carry `trace_context`
+  - When a remote peer receives it, the context is extracted and used as parent
+
+- Test context propagation:
+  - Manually verify with 2+ node setup that trace IDs match across nodes
+  - Confirm parent-child span relationships are correct in Jaeger
+
+- Handle edge cases:
+  - Missing trace context (older peers): create new root span
+  - Corrupted trace context: log warning, create new root span
+  - Sampled-out traces: respect trace flags
+
+**Key modified files**:
+
+- `src/xrpld/overlay/detail/PeerImp.cpp`
+- `src/xrpld/overlay/detail/OverlayImpl.cpp` (if relay method needs context param)
+
+**Reference**:
+
+- [02-design-decisions.md §2.5](./02-design-decisions.md) — Context propagation design
+- [04-code-samples.md §4.5.1](./04-code-samples.md) — Relay context injection pattern
+
+---
+
+## Task 3.7: Build Verification and Testing
+
+**Objective**: Verify all Phase 3 changes compile and work correctly.
+
+**What to do**:
+
+1. Build with `telemetry=ON` — verify no compilation errors
+2. Build with `telemetry=OFF` — verify no regressions
+3. Run existing unit tests
+4. Verify protobuf regeneration produces correct C++ code
+5. Document any issues encountered
+
+**Verification Checklist**:
+
+- [ ] Protobuf changes generate valid C++
+- [ ] Build succeeds with telemetry ON
+- [ ] Build succeeds with telemetry OFF
+- [ ] Existing tests pass
+- [ ] No undefined symbols from new telemetry calls
+
+---
+
+## Summary
+
+| Task | Description                         | New Files | Modified Files | Depends On |
+| ---- | ----------------------------------- | --------- | -------------- | ---------- |
+| 3.1  | TraceContext protobuf message       | 0         | 1              | Phase 2    |
+| 3.2  | Protobuf context serialization      | 1-2       | 0              | 3.1        |
+| 3.3  | PeerImp transaction instrumentation | 0         | 1              | 3.2        |
+| 3.4  | NetworkOPs transaction processing   | 0         | 1              | Phase 2    |
+| 3.5  | HashRouter dedup visibility         | 0         | 1              | 3.3        |
+| 3.6  | Relay context propagation           | 0         | 1-2            | 3.3, 3.5   |
+| 3.7  | Build verification and testing      | 0         | 0              | 3.1-3.6    |
+
+**Parallel work**: Tasks 3.1 and 3.4 can start in parallel. Task 3.2 depends on 3.1. Tasks 3.3 and 3.5 depend on 3.2. Task 3.6 depends on 3.3 and 3.5.
+
+**Exit Criteria** (from [06-implementation-phases.md §6.11.3](./06-implementation-phases.md)):
+
+- [ ] Transaction traces span across nodes
+- [ ] Trace context in Protocol Buffer messages
+- [ ] HashRouter deduplication visible in traces
+- [ ] <5% overhead on transaction throughput
+
+---
+
+## Known Issues / Future Work
+
+### Propagation utilities not yet wired into P2P flow
+
+`extractFromProtobuf()` and `injectToProtobuf()` in `TraceContextPropagator.h`
+are implemented and tested but not called from production code. To enable
+cross-node distributed traces:
+
+- Call `injectToProtobuf()` in `PeerImp` when sending `TMTransaction` /
+  `TMProposeSet` messages
+- Call `extractFromProtobuf()` in the corresponding message handlers to
+  reconstruct the parent span context, then pass it to `startSpan()` as the
+  parent
+
+This was deferred to validate single-node tracing performance first.
+
+### Unused trace_state proto field
+
+The `TraceContext.trace_state` field (field 4) in `xrpl.proto` is reserved for
+W3C `tracestate` vendor-specific key-value pairs but is not read or written by
+`TraceContextPropagator`. Wire it when cross-vendor trace propagation is needed.
+No wire cost since proto `optional` fields are zero-cost when absent.

OpenTelemetryPlan/Phase4_taskList.md

@@ -0,0 +1,833 @@
+# Phase 4: Consensus Tracing Task List
+
+> **Goal**: Full observability into consensus rounds — track round lifecycle, phase transitions, proposal handling, and validation. This is the RUN phase that completes the distributed tracing story.
+>
+> **Scope**: RCLConsensus instrumentation for round starts, phase transitions (open/establish/accept), proposal send/receive, validation handling, and correlation with transaction traces from Phase 3.
+>
+> **Branch**: `pratik/otel-phase4-consensus-tracing` (from `pratik/otel-phase3-tx-tracing`)
+
+### Related Plan Documents
+
+| Document                                                     | Relevance                                                   |
+| ------------------------------------------------------------ | ----------------------------------------------------------- |
+| [04-code-samples.md](./04-code-samples.md)                   | Consensus instrumentation (§4.5.2), consensus span patterns |
+| [01-architecture-analysis.md](./01-architecture-analysis.md) | Consensus round flow (§1.4), key trace points (§1.6)        |
+| [06-implementation-phases.md](./06-implementation-phases.md) | Phase 4 tasks (§6.5), definition of done (§6.11.4)          |
+| [02-design-decisions.md](./02-design-decisions.md)           | Consensus attribute schema (§2.4.4)                         |
+
+---
+
+## Task 4.1: Instrument Consensus Round Start
+
+**Objective**: Create a root span for each consensus round that captures the round's key parameters.
+
+**What to do**:
+
+- Edit `src/xrpld/app/consensus/RCLConsensus.cpp`:
+  - In `RCLConsensus::startRound()` (or the Adaptor's startRound):
+    - Create `consensus.round` span using `XRPL_TRACE_CONSENSUS` macro
+    - Set attributes:
+      - `xrpl.consensus.ledger.prev` — previous ledger hash
+      - `xrpl.consensus.ledger.seq` — target ledger sequence
+      - `xrpl.consensus.proposers` — number of trusted proposers
+      - `xrpl.consensus.mode` — "proposing" or "observing"
+    - Store the span context for use by child spans in phase transitions
+
+- Add a member to hold current round trace context:
+  - `opentelemetry::context::Context currentRoundContext_` (guarded by `#ifdef`)
+  - Updated at round start, used by phase transition spans
+
+**Key modified files**:
+
+- `src/xrpld/app/consensus/RCLConsensus.cpp`
+- `src/xrpld/app/consensus/RCLConsensus.h` (add context member)
+
+**Reference**:
+
+- [04-code-samples.md §4.5.2](./04-code-samples.md) — startRound instrumentation example
+- [01-architecture-analysis.md §1.4](./01-architecture-analysis.md) — Consensus round flow
+
+---
+
+## Task 4.2: Instrument Phase Transitions
+
+**Objective**: Create child spans for each consensus phase (open, establish, accept) to show timing breakdown.
+
+**What to do**:
+
+- Edit `src/xrpld/app/consensus/RCLConsensus.cpp`:
+  - Identify where phase transitions occur (the `Consensus<Adaptor>` template drives this)
+  - For each phase entry:
+    - Create span as child of `currentRoundContext_`: `consensus.phase.open`, `consensus.phase.establish`, `consensus.phase.accept`
+    - Set `xrpl.consensus.phase` attribute
+    - Add `phase.enter` event at start, `phase.exit` event at end
+    - Record phase duration in milliseconds
+
+  - In the `onClose` adaptor method:
+    - Create `consensus.ledger_close` span
+    - Set attributes: close_time, mode, transaction count in initial position
+
+  - Note: The Consensus template class in `src/xrpld/consensus/Consensus.h` drives phase transitions — Phase 4a instruments directly in the template
+
+**Key modified files**:
+
+- `src/xrpld/app/consensus/RCLConsensus.cpp`
+- Possibly `include/xrpl/consensus/Consensus.h` (for template-level phase tracking)
+
+**Reference**:
+
+- [04-code-samples.md §4.5.2](./04-code-samples.md) — phaseTransition instrumentation
+
+---
+
+## Task 4.3: Instrument Proposal Handling
+
+**Objective**: Trace proposal send and receive to show validator coordination.
+
+**What to do**:
+
+- Edit `src/xrpld/app/consensus/RCLConsensus.cpp`:
+  - In `Adaptor::propose()`:
+    - Create `consensus.proposal.send` span
+    - Set attributes: `xrpl.consensus.round` (proposal sequence), proposal hash
+    - Inject trace context into outgoing `TMProposeSet::trace_context` (from Phase 3 protobuf)
+
+  - In `Adaptor::peerProposal()` (or wherever peer proposals are received):
+    - Extract trace context from incoming `TMProposeSet::trace_context`
+    - Create `consensus.proposal.receive` span as child of extracted context
+    - Set attributes: `xrpl.consensus.proposer` (node ID), `xrpl.consensus.round`
+
+  - In `Adaptor::share(RCLCxPeerPos)`:
+    - Create `consensus.proposal.relay` span for relaying peer proposals
+
+**Key modified files**:
+
+- `src/xrpld/app/consensus/RCLConsensus.cpp`
+
+**Reference**:
+
+- [04-code-samples.md §4.5.2](./04-code-samples.md) — peerProposal instrumentation
+- [02-design-decisions.md §2.4.4](./02-design-decisions.md) — Consensus attribute schema
+
+---
+
+## Task 4.4: Instrument Validation Handling
+
+**Objective**: Trace validation send and receive to show ledger validation flow.
+
+**What to do**:
+
+- Edit `src/xrpld/app/consensus/RCLConsensus.cpp` (or the validation handler):
+  - When sending our validation:
+    - Create `consensus.validation.send` span
+    - Set attributes: validated ledger hash, sequence, signing time
+
+  - When receiving a peer validation:
+    - Extract trace context from `TMValidation::trace_context` (if present)
+    - Create `consensus.validation.receive` span
+    - Set attributes: `xrpl.consensus.validator` (node ID), ledger hash
+
+**Key modified files**:
+
+- `src/xrpld/app/consensus/RCLConsensus.cpp`
+- `src/xrpld/app/misc/NetworkOPs.cpp` (if validation handling is here)
+
+---
+
+## Task 4.5: Add Consensus-Specific Attributes
+
+**Objective**: Enrich consensus spans with detailed attributes for debugging and analysis.
+
+**What to do**:
+
+- Review all consensus spans and ensure they include:
+  - `xrpl.consensus.ledger.seq` — target ledger sequence number
+  - `xrpl.consensus.round` — consensus round number
+  - `xrpl.consensus.mode` — proposing/observing/wrongLedger
+  - `xrpl.consensus.phase` — current phase name
+  - `xrpl.consensus.phase_duration_ms` — time spent in phase
+  - `xrpl.consensus.proposers` — number of trusted proposers
+  - `xrpl.consensus.tx_count` — transactions in proposed set
+  - `xrpl.consensus.disputes` — number of disputed transactions
+  - `xrpl.consensus.converge_percent` — convergence percentage
+
+**Key modified files**:
+
+- `src/xrpld/app/consensus/RCLConsensus.cpp`
+
+---
+
+## Task 4.6: Correlate Transaction and Consensus Traces
+
+**Objective**: Link transaction traces from Phase 3 with consensus traces so you can follow a transaction from submission through consensus into the ledger.
+
+**What to do**:
+
+- In `onClose()` or `onAccept()`:
+  - When building the consensus position, link the round span to individual transaction spans using span links (if OTel SDK supports it) or events
+  - At minimum, record the transaction hashes included in the consensus set as span events: `tx.included` with `xrpl.tx.hash` attribute
+
+- In `processTransactionSet()` (NetworkOPs):
+  - If the consensus round span context is available, create child spans for each transaction applied to the ledger
+
+**Key modified files**:
+
+- `src/xrpld/app/consensus/RCLConsensus.cpp`
+- `src/xrpld/app/misc/NetworkOPs.cpp`
+
+---
+
+## Task 4.7: Build Verification and Testing
+
+**Objective**: Verify all Phase 4 changes compile and don't affect consensus timing.
+
+**What to do**:
+
+1. Build with `telemetry=ON` — verify no compilation errors
+2. Build with `telemetry=OFF` — verify no regressions (critical for consensus code)
+3. Run existing consensus-related unit tests
+4. Verify that all macros expand to no-ops when disabled
+5. Check that no consensus-critical code paths are affected by instrumentation overhead
+
+**Verification Checklist**:
+
+- [ ] Build succeeds with telemetry ON
+- [ ] Build succeeds with telemetry OFF
+- [ ] Existing consensus tests pass
+- [ ] No new includes in consensus headers when telemetry is OFF
+- [ ] Phase timing instrumentation doesn't use blocking operations
+
+---
+
+## Summary
+
+| Task | Description                           | New Files | Modified Files | Depends On    |
+| ---- | ------------------------------------- | --------- | -------------- | ------------- |
+| 4.1  | Consensus round start instrumentation | 0         | 2              | Phase 3       |
+| 4.2  | Phase transition instrumentation      | 0         | 1-2            | 4.1           |
+| 4.3  | Proposal handling instrumentation     | 0         | 1              | 4.1           |
+| 4.4  | Validation handling instrumentation   | 0         | 1-2            | 4.1           |
+| 4.5  | Consensus-specific attributes         | 0         | 1              | 4.2, 4.3, 4.4 |
+| 4.6  | Transaction-consensus correlation     | 0         | 2              | 4.2, Phase 3  |
+| 4.7  | Build verification and testing        | 0         | 0              | 4.1-4.6       |
+
+**Parallel work**: Tasks 4.2, 4.3, and 4.4 can run in parallel after 4.1 is complete. Task 4.5 depends on all three. Task 4.6 depends on 4.2 and Phase 3.
+
+### Implemented Spans
+
+| Span Name                   | Method                             | Key Attributes                                                                                                                |
+| --------------------------- | ---------------------------------- | ----------------------------------------------------------------------------------------------------------------------------- |
+| `consensus.proposal.send`   | `Adaptor::propose`                 | `xrpl.consensus.round`                                                                                                        |
+| `consensus.ledger_close`    | `Adaptor::onClose`                 | `xrpl.consensus.ledger.seq`, `xrpl.consensus.mode`                                                                            |
+| `consensus.accept`          | `Adaptor::onAccept`                | `xrpl.consensus.proposers`, `xrpl.consensus.round_time_ms`                                                                    |
+| `consensus.accept.apply`    | `Adaptor::doAccept`                | `xrpl.consensus.close_time`, `close_time_correct`, `close_resolution_ms`, `state`, `proposing`, `round_time_ms`, `ledger.seq` |
+| `consensus.validation.send` | `Adaptor::onAccept` (via validate) | `xrpl.consensus.proposing`                                                                                                    |
+
+#### Close Time Attributes (consensus.accept.apply)
+
+The `consensus.accept.apply` span captures ledger close time agreement details
+driven by `avCT_CONSENSUS_PCT` (75% validator agreement threshold):
+
+- **`xrpl.consensus.close_time`** — Agreed-upon ledger close time (epoch seconds). When validators disagree (`consensusCloseTime == epoch`), this is synthetically set to `prevCloseTime + 1s`.
+- **`xrpl.consensus.close_time_correct`** — `true` if validators reached agreement, `false` if they "agreed to disagree" (close time forced to prev+1s).
+- **`xrpl.consensus.close_resolution_ms`** — Rounding granularity for close time (starts at 30s, decreases as ledger interval stabilizes).
+- **`xrpl.consensus.state`** — `"finished"` (normal) or `"moved_on"` (consensus failed, adopted best available).
+- **`xrpl.consensus.proposing`** — Whether this node was proposing.
+- **`xrpl.consensus.round_time_ms`** — Total consensus round duration.
+
+**Exit Criteria** (from [06-implementation-phases.md §6.11.4](./06-implementation-phases.md)):
+
+- [x] Complete consensus round traces
+- [x] Phase transitions visible
+- [x] Proposals and validations traced
+- [x] Close time agreement tracked (per `avCT_CONSENSUS_PCT`)
+- [x] No impact on consensus timing
+
+---
+
+# Phase 4a: Establish-Phase Gap Fill & Cross-Node Correlation
+
+> **Goal**: Fill tracing gaps in the consensus establish phase (disputes, convergence,
+> threshold escalation, mode changes) and establish cross-node correlation using a
+> deterministic shared trace ID derived from `previousLedger.id()`.
+>
+> **Approach**: Direct instrumentation in `Consensus.h` — the generic consensus
+> template has full access to internal state (`convergePercent_`, `result_->disputes`,
+> `mode_`, threshold logic). Telemetry access comes via a single new adaptor
+> method `getTelemetry()`. Long-lived spans (round, establish) are stored as
+> class members using `SpanGuard` directly — NOT the `XRPL_TRACE_*` convenience
+> macros (which create local variables named `_xrpl_guard_`). Short-lived
+> scoped spans (update_positions, check) can use the macros. All code compiles
+> to no-ops when `XRPL_ENABLE_TELEMETRY` is not defined.
+>
+> **Branch**: `pratik/otel-phase4-consensus-tracing`
+
+## Design: Switchable Correlation Strategy
+
+Two strategies for cross-node trace correlation, switchable via config:
+
+### Strategy A — Deterministic Trace ID (Default)
+
+Derive `trace_id = SHA256(previousLedger.id())[0:16]` so all nodes in the same
+consensus round share the same trace_id without P2P context propagation.
+
+- **Pros**: All nodes appear in the same trace in Tempo/Jaeger automatically.
+  No collector-side post-processing needed.
+- **Cons**: Overrides OTel's random trace_id generation; requires custom
+  `IdGenerator` or manual span context construction.
+
+### Strategy B — Attribute-Based Correlation
+
+Use normal random trace_id but attach `xrpl.consensus.ledger_id` as an attribute
+on every consensus span. Correlation happens at query time via Tempo/Grafana
+`by attribute` queries.
+
+- **Pros**: Standard OTel trace_id semantics; no SDK customization.
+- **Cons**: Cross-node correlation requires query-time joins, not automatic.
+
+### Config
+
+```ini
+[telemetry]
+# "deterministic" (default) or "attribute"
+consensus_trace_strategy=deterministic
+```
+
+### Implementation
+
+In `RCLConsensus::Adaptor::startRound()`:
+
+- If `deterministic`:
+  1. Compute `trace_id_bytes = SHA256(prevLedgerID)[0:16]`
+  2. Construct `opentelemetry::trace::TraceId(trace_id_bytes)`
+  3. Create a synthetic `SpanContext` with this trace_id and a random span_id:
+     ```cpp
+     auto traceId = opentelemetry::trace::TraceId(trace_id_bytes);
+     auto spanId  = opentelemetry::trace::SpanId(random_8_bytes);
+     auto syntheticCtx = opentelemetry::trace::SpanContext(
+         traceId, spanId, opentelemetry::trace::TraceFlags(1), false);
+     ```
+  4. Wrap in `opentelemetry::context::Context` via
+     `opentelemetry::trace::SetSpan(context, syntheticSpan)`
+  5. Call `startSpan("consensus.round", parentContext)` so the new span
+     inherits the deterministic trace_id.
+- If `attribute`: start a normal `consensus.round` span, set
+  `xrpl.consensus.ledger_id = previousLedger.id()` as attribute.
+
+Both strategies always set `xrpl.consensus.round_id` (round number) and
+`xrpl.consensus.ledger_id` (previous ledger hash) as attributes.
+
+---
+
+## Design: Span Hierarchy
+
+```
+consensus.round  (root — created in RCLConsensus::startRound, closed at accept)
+│   link → previous round's SpanContext (follows-from)
+│
+├── consensus.establish  (phaseEstablish → acceptance, in Consensus.h)
+│   ├── consensus.update_positions  (each updateOurPositions call)
+│   │   └── consensus.dispute.resolve  (per-tx dispute resolution event)
+│   ├── consensus.check  (each haveConsensus call)
+│   └── consensus.mode_change  (short-lived span in adaptor on mode transition)
+│
+├── consensus.accept  (existing onAccept span — reparented under round)
+│
+└── consensus.validation.send  (existing — reparented, follows-from link to round)
+```
+
+### Span Links (follows-from relationships)
+
+| Link Source                               | Link Target                | Rationale                                                                      |
+| ----------------------------------------- | -------------------------- | ------------------------------------------------------------------------------ |
+| `consensus.round` (N+1)                   | `consensus.round` (N)      | Causal chain: round N+1 exists because round N accepted                        |
+| `consensus.validation.send`               | `consensus.round`          | Validation follows from the round that produced it; may outlive the round span |
+| _(Phase 4b)_ Received proposal processing | Sender's `consensus.round` | Cross-node causal link via P2P context propagation                             |
+
+---
+
+## Task 4a.0: Prerequisites — Extend SpanGuard and Telemetry APIs
+
+**Objective**: Add missing API surface needed by later tasks.
+
+**What to do**:
+
+1. **Add `SpanGuard::addEvent()` with attributes** (needed by Task 4a.5):
+   The current `addEvent(string_view name)` only accepts a name. Add an
+   overload that accepts key-value attributes:
+
+   ```cpp
+   void addEvent(std::string_view name,
+       std::initializer_list<
+           std::pair<opentelemetry::nostd::string_view,
+                     opentelemetry::common::AttributeValue>> attributes)
+   {
+       span_->AddEvent(std::string(name), attributes);
+   }
+   ```
+
+2. **Add a `Telemetry::startSpan()` overload that accepts span links** (needed by Tasks 4a.2, 4a.8):
+   The current `startSpan()` has no span link support. Add an overload that
+   accepts a vector of `SpanContext` links for follows-from relationships:
+
+   ```cpp
+   virtual opentelemetry::nostd::shared_ptr<opentelemetry::trace::Span>
+   startSpan(
+       std::string_view name,
+       opentelemetry::context::Context const& parentContext,
+       std::vector<opentelemetry::trace::SpanContext> const& links,
+       opentelemetry::trace::SpanKind kind = opentelemetry::trace::SpanKind::kInternal) = 0;
+   ```
+
+3. **Add `XRPL_TRACE_ADD_EVENT` macro** (needed by Task 4a.5):
+   Add to `TracingInstrumentation.h` to expose `addEvent(name, attrs)` through
+   the macro interface (consistent with `XRPL_TRACE_SET_ATTR` pattern):
+   ```cpp
+   #ifdef XRPL_ENABLE_TELEMETRY
+   #define XRPL_TRACE_ADD_EVENT(name, ...)               \
+       if (_xrpl_guard_.has_value())                     \
+       {                                                 \
+           _xrpl_guard_->addEvent(name, __VA_ARGS__);   \
+       }
+   #else
+   #define XRPL_TRACE_ADD_EVENT(name, ...) ((void)0)
+   #endif
+   ```
+
+**Key modified files**:
+
+- `include/xrpl/telemetry/SpanGuard.h` — add `addEvent()` overload
+- `include/xrpl/telemetry/Telemetry.h` — add `startSpan()` with links
+- `src/xrpld/telemetry/Telemetry.cpp` — implement new overload
+- `src/xrpld/telemetry/NullTelemetry.cpp` — no-op implementation
+- `src/xrpld/telemetry/TracingInstrumentation.h` — add `XRPL_TRACE_ADD_EVENT` macro
+
+---
+
+## Task 4a.1: Adaptor `getTelemetry()` Method
+
+**Objective**: Give `Consensus.h` access to the telemetry subsystem without
+coupling the generic template to OTel headers.
+
+**What to do**:
+
+- Add `getTelemetry()` method to the Adaptor concept (returns
+  `xrpl::telemetry::Telemetry&`). The return type is already forward-declared
+  behind `#ifdef XRPL_ENABLE_TELEMETRY`.
+- Implement in `RCLConsensus::Adaptor` — delegates to `app_.getTelemetry()`.
+- In `Consensus.h`, the `XRPL_TRACE_*` macros call
+  `adaptor_.getTelemetry()` — when telemetry is disabled, the macros expand to
+  `((void)0)` and the method is never called.
+
+**Key modified files**:
+
+- `src/xrpld/app/consensus/RCLConsensus.h` — declare `getTelemetry()`
+- `src/xrpld/app/consensus/RCLConsensus.cpp` — implement `getTelemetry()`
+
+---
+
+## Task 4a.2: Switchable Round Span with Deterministic Trace ID
+
+**Objective**: Create a `consensus.round` root span in `startRound()` that uses
+the switchable correlation strategy. Store span context as a member for child
+spans in `Consensus.h`.
+
+**What to do**:
+
+- In `RCLConsensus::Adaptor::startRound()` (or a new helper):
+  - Read `consensus_trace_strategy` from config.
+  - **Deterministic**: compute `trace_id = SHA256(prevLedgerID)[0:16]`.
+    Construct a `SpanContext` with this trace_id, then start
+    `consensus.round` span as child of that context.
+  - **Attribute**: start normal `consensus.round` span.
+  - Set attributes on both: `xrpl.consensus.round_id`,
+    `xrpl.consensus.ledger_id`, `xrpl.consensus.ledger.seq`,
+    `xrpl.consensus.mode`.
+  - Store the round span in `Consensus` as a member (see Task 4a.3).
+  - If a previous round's span context is available, add a **span link**
+    (follows-from) to establish the round chain.
+
+- Add `createDeterministicTraceId(hash)` utility to
+  `include/xrpl/telemetry/Telemetry.h` (returns 16-byte trace ID from a
+  256-bit hash by truncation).
+
+- Add `consensus_trace_strategy` to `Telemetry::Setup` and
+  `TelemetryConfig.cpp` parser:
+  ```cpp
+  /** Cross-node correlation strategy: "deterministic" or "attribute". */
+  std::string consensusTraceStrategy = "deterministic";
+  ```
+
+**Key modified files**:
+
+- `src/xrpld/app/consensus/RCLConsensus.cpp`
+- `include/xrpl/telemetry/Telemetry.h` — `createDeterministicTraceId()`
+- `src/xrpld/telemetry/TelemetryConfig.cpp` — parse new config option
+
+---
+
+## Task 4a.3: Span Members in `Consensus.h`
+
+**Objective**: Add span storage to the `Consensus` class so that spans created
+in `startRound()` (adaptor) are accessible from `phaseEstablish()`,
+`updateOurPositions()`, and `haveConsensus()` (template methods).
+
+**What to do**:
+
+- Add to `Consensus` private members (guarded by `#ifdef XRPL_ENABLE_TELEMETRY`):
+  ```cpp
+  #ifdef XRPL_ENABLE_TELEMETRY
+  std::optional<xrpl::telemetry::SpanGuard> roundSpan_;
+  std::optional<xrpl::telemetry::SpanGuard> establishSpan_;
+  opentelemetry::context::Context prevRoundContext_;
+  #endif
+  ```
+- `roundSpan_` is created in `startRound()` via the adaptor and stored.
+  Its `SpanGuard::Scope` member keeps the span active on the thread context
+  for the entire round lifetime.
+- `establishSpan_` is created when entering phaseEstablish and cleared on accept.
+  It becomes a child of `roundSpan_` via OTel's thread-local context propagation.
+- `prevRoundContext_` stores the previous round's context for follows-from links.
+
+**Threading assumption**: `startRound()`, `phaseEstablish()`, `updateOurPositions()`,
+and `haveConsensus()` all run on the same thread (the consensus job queue thread).
+This is required for the `SpanGuard::Scope`-based parent-child hierarchy to work.
+The `Consensus` class documentation confirms it is NOT thread-safe and calls are
+serialized by the application.
+
+- Add conditional include at top of `Consensus.h`:
+  ```cpp
+  #ifdef XRPL_ENABLE_TELEMETRY
+  #include <xrpl/telemetry/SpanGuard.h>
+  #include <xrpld/telemetry/TracingInstrumentation.h>
+  #endif
+  ```
+
+**Key modified files**:
+
+- `src/xrpld/consensus/Consensus.h`
+
+---
+
+## Task 4a.4: Instrument `phaseEstablish()`
+
+**Objective**: Create `consensus.establish` span wrapping the establish phase,
+with attributes for convergence progress.
+
+**What to do**:
+
+- At the start of `phaseEstablish()` (line 1298), if `establishSpan_` is not
+  yet created, create it as child of `roundSpan_` using the **direct API**
+  (NOT the `XRPL_TRACE_CONSENSUS` macro, which creates a local variable):
+
+  ```cpp
+  #ifdef XRPL_ENABLE_TELEMETRY
+  if (!establishSpan_ && adaptor_.getTelemetry().shouldTraceConsensus())
+  {
+      establishSpan_.emplace(
+          adaptor_.getTelemetry().startSpan("consensus.establish"));
+  }
+  #endif
+  ```
+
+- Set attributes on each call:
+  - `xrpl.consensus.converge_percent` — `convergePercent_`
+  - `xrpl.consensus.establish_count` — `establishCounter_`
+  - `xrpl.consensus.proposers` — `currPeerPositions_.size()`
+
+- On phase exit (transition to accept), close the establish span and record
+  final duration.
+
+**Key modified files**:
+
+- `src/xrpld/consensus/Consensus.h` — `phaseEstablish()` method
+
+---
+
+## Task 4a.5: Instrument `updateOurPositions()`
+
+**Objective**: Trace each position update cycle including dispute resolution
+details.
+
+**What to do**:
+
+- At the start of `updateOurPositions()` (line 1418), create a scoped child
+  span. This method is called and returns within a single `phaseEstablish()`
+  call, so the `XRPL_TRACE_CONSENSUS` macro works here (scoped local):
+
+  ```cpp
+  XRPL_TRACE_CONSENSUS(adaptor_.getTelemetry(), "consensus.update_positions");
+  ```
+
+- Set attributes:
+  - `xrpl.consensus.disputes_count` — `result_->disputes.size()`
+  - `xrpl.consensus.converge_percent` — current convergence
+  - `xrpl.consensus.proposers_agreed` — count of peers with same position
+  - `xrpl.consensus.proposers_total` — total peer positions
+
+- Inside the dispute resolution loop, for each dispute that changes our vote,
+  add an **event** with attributes using `XRPL_TRACE_ADD_EVENT` (from Task 4a.0):
+  ```cpp
+  XRPL_TRACE_ADD_EVENT("dispute.resolve", {
+      {"xrpl.tx.id", std::string(tx_id)},
+      {"xrpl.dispute.our_vote", our_vote},
+      {"xrpl.dispute.yays", static_cast<int64_t>(yays)},
+      {"xrpl.dispute.nays", static_cast<int64_t>(nays)}
+  });
+  ```
+
+**Key modified files**:
+
+- `src/xrpld/consensus/Consensus.h` — `updateOurPositions()` method
+
+---
+
+## Task 4a.6: Instrument `haveConsensus()` (Threshold & Convergence)
+
+**Objective**: Trace consensus checking including threshold escalation
+(`ConsensusParms::AvalancheState::{init, mid, late, stuck}`).
+
+**What to do**:
+
+- At the start of `haveConsensus()` (line 1598), create a scoped child span:
+
+  ```cpp
+  XRPL_TRACE_CONSENSUS(adaptor_.getTelemetry(), "consensus.check");
+  ```
+
+- Set attributes:
+  - `xrpl.consensus.agree_count` — peers that agree with our position
+  - `xrpl.consensus.disagree_count` — peers that disagree
+  - `xrpl.consensus.converge_percent` — convergence percentage
+  - `xrpl.consensus.result` — ConsensusState result (Yes/No/MovedOn)
+
+- The free function `checkConsensus()` in `Consensus.cpp` (line 151) determines
+  thresholds based on `currentAgreeTime`. Threshold values come from
+  `ConsensusParms::avalancheCutoffs` (defined in `ConsensusParms.h`).
+  The escalation states are `ConsensusParms::AvalancheState::{init, mid, late, stuck}`.
+  Record the effective threshold as an attribute on the span:
+  - `xrpl.consensus.threshold_percent` — current threshold from `avalancheCutoffs`
+
+**Key modified files**:
+
+- `src/xrpld/consensus/Consensus.h` — `haveConsensus()` method
+
+---
+
+## Task 4a.7: Instrument Mode Changes
+
+**Objective**: Trace consensus mode transitions (proposing ↔ observing,
+wrongLedger, switchedLedger).
+
+**What to do**:
+
+Mode changes are rare (typically 0-1 per round), so a **standalone short-lived
+span** is appropriate (not an event). This captures timing of the mode change
+itself.
+
+- In `RCLConsensus::Adaptor::onModeChange()`, create a scoped span:
+
+  ```cpp
+  XRPL_TRACE_CONSENSUS(app_.getTelemetry(), "consensus.mode_change");
+  XRPL_TRACE_SET_ATTR("xrpl.consensus.mode.old", to_string(before).c_str());
+  XRPL_TRACE_SET_ATTR("xrpl.consensus.mode.new", to_string(after).c_str());
+  ```
+
+- Note: `MonitoredMode::set()` (line 304 in `Consensus.h`) calls
+  `adaptor_.onModeChange(before, after)` — so the span is created in the
+  adaptor, which already has telemetry access. No instrumentation needed
+  in `Consensus.h` for this task.
+
+**Key modified files**:
+
+- `src/xrpld/app/consensus/RCLConsensus.cpp` — `onModeChange()`
+
+---
+
+## Task 4a.8: Reparent Existing Spans Under Round
+
+**Objective**: Make existing consensus spans (`consensus.accept`,
+`consensus.accept.apply`, `consensus.validation.send`) children of the
+`consensus.round` root span instead of being standalone.
+
+**What to do**:
+
+- The existing spans in `onAccept()`, `doAccept()`, and `validate()` use
+  `XRPL_TRACE_CONSENSUS(app_.getTelemetry(), ...)` which creates standalone
+  spans on the current thread's context.
+- After Task 4a.2 creates the round span and stores it, these methods run on
+  the same thread within the round span's scope, so they automatically become
+  children. Verify this works correctly.
+- For `consensus.validation.send`: add a **span link** (follows-from) to the
+  round span context, since the validation may be processed after the round
+  completes.
+
+**Key modified files**:
+
+- `src/xrpld/app/consensus/RCLConsensus.cpp` — verify parent-child hierarchy
+
+---
+
+## Task 4a.9: Build Verification and Testing
+
+**Objective**: Verify all Phase 4a changes compile cleanly with telemetry ON
+and OFF, and don't affect consensus timing.
+
+**What to do**:
+
+1. Build with `telemetry=ON` — verify no compilation errors
+2. Build with `telemetry=OFF` — verify macros expand to no-ops, no new includes
+   leak into `Consensus.h` when disabled
+3. Run existing consensus unit tests
+4. Verify `#ifdef XRPL_ENABLE_TELEMETRY` guards on all new members in
+   `Consensus.h`
+5. Run `pccl` pre-commit checks
+
+**Verification Checklist**:
+
+- [x] Build succeeds with telemetry ON
+- [x] Build succeeds with telemetry OFF
+- [x] Existing consensus tests pass
+- [x] `Consensus.h` has zero OTel includes when telemetry is OFF
+- [x] No new virtual calls in hot consensus paths
+- [x] `pccl` passes
+
+---
+
+## Phase 4a Summary
+
+| Task | Description                                      | New Files | Modified Files | Depends On |
+| ---- | ------------------------------------------------ | --------- | -------------- | ---------- |
+| 4a.0 | Prerequisites: extend SpanGuard & Telemetry APIs | 0         | 4              | Phase 4    |
+| 4a.1 | Adaptor `getTelemetry()` method                  | 0         | 2              | Phase 4    |
+| 4a.2 | Switchable round span with deterministic traceID | 0         | 3              | 4a.0, 4a.1 |
+| 4a.3 | Span members in `Consensus.h`                    | 0         | 1              | 4a.1       |
+| 4a.4 | Instrument `phaseEstablish()`                    | 0         | 1              | 4a.3       |
+| 4a.5 | Instrument `updateOurPositions()`                | 0         | 1              | 4a.0, 4a.3 |
+| 4a.6 | Instrument `haveConsensus()` (thresholds)        | 0         | 1              | 4a.3       |
+| 4a.7 | Instrument mode changes                          | 0         | 1              | 4a.1       |
+| 4a.8 | Reparent existing spans under round              | 0         | 1              | 4a.0, 4a.2 |
+| 4a.9 | Build verification and testing                   | 0         | 0              | 4a.0-4a.8  |
+
+**Parallel work**: Tasks 4a.0 and 4a.1 can run in parallel. Tasks 4a.4, 4a.5, 4a.6, and 4a.7 can run in parallel after 4a.3 (and 4a.0 for 4a.5).
+
+### New Spans (Phase 4a)
+
+| Span Name                    | Location           | Key Attributes                                                                     |
+| ---------------------------- | ------------------ | ---------------------------------------------------------------------------------- |
+| `consensus.round`            | `RCLConsensus.cpp` | `round_id`, `ledger_id`, `ledger.seq`, `mode`; link → prev round                   |
+| `consensus.establish`        | `Consensus.h`      | `converge_percent`, `establish_count`, `proposers`                                 |
+| `consensus.update_positions` | `Consensus.h`      | `disputes_count`, `converge_percent`, `proposers_agreed`, `proposers_total`        |
+| `consensus.check`            | `Consensus.h`      | `agree_count`, `disagree_count`, `converge_percent`, `result`, `threshold_percent` |
+| `consensus.mode_change`      | `RCLConsensus.cpp` | `mode.old`, `mode.new`                                                             |
+
+### New Events (Phase 4a)
+
+| Event Name        | Parent Span                  | Attributes                          |
+| ----------------- | ---------------------------- | ----------------------------------- |
+| `dispute.resolve` | `consensus.update_positions` | `tx_id`, `our_vote`, `yays`, `nays` |
+
+### New Attributes (Phase 4a)
+
+```cpp
+// Round-level (on consensus.round)
+"xrpl.consensus.round_id"              = int64    // Consensus round number
+"xrpl.consensus.ledger_id"             = string   // previousLedger.id() hash
+"xrpl.consensus.trace_strategy"        = string   // "deterministic" or "attribute"
+
+// Establish-level
+"xrpl.consensus.converge_percent"      = int64    // Convergence % (0-100+)
+"xrpl.consensus.establish_count"       = int64    // Number of establish iterations
+"xrpl.consensus.disputes_count"        = int64    // Active disputes
+"xrpl.consensus.proposers_agreed"      = int64    // Peers agreeing with us
+"xrpl.consensus.proposers_total"       = int64    // Total peer positions
+"xrpl.consensus.agree_count"           = int64    // Peers that agree (haveConsensus)
+"xrpl.consensus.disagree_count"        = int64    // Peers that disagree
+"xrpl.consensus.threshold_percent"     = int64    // Current threshold (50/65/70/95)
+"xrpl.consensus.result"                = string   // "yes", "no", "moved_on"
+
+// Mode change
+"xrpl.consensus.mode.old"              = string   // Previous mode
+"xrpl.consensus.mode.new"              = string   // New mode
+```
+
+### Implementation Notes
+
+- **Separation of concerns**: All non-trivial telemetry code extracted to private
+  helpers (`startRoundTracing`, `createValidationSpan`, `startEstablishTracing`,
+  `updateEstablishTracing`, `endEstablishTracing`). Business logic methods contain
+  only single-line `#ifdef` blocks calling these helpers.
+- **Thread safety**: `createValidationSpan()` runs on the jtACCEPT worker thread.
+  Instead of accessing `roundSpan_` across threads, a `roundSpanContext_` snapshot
+  (lightweight `SpanContext` value type) is captured on the consensus thread in
+  `startRoundTracing()` and read by `createValidationSpan()`. The job queue
+  provides the happens-before guarantee.
+- **Macro safety**: `XRPL_TRACE_ADD_EVENT` uses `do { } while (0)` to prevent
+  dangling-else issues.
+- **Config validation**: `consensus_trace_strategy` is validated to be either
+  `"deterministic"` or `"attribute"`, falling back to `"deterministic"` for
+  unrecognised values.
+- **Plan deviation**: `roundSpan_` is stored in `RCLConsensus::Adaptor` (not
+  `Consensus.h`) because the adaptor has access to telemetry config and can
+  implement the deterministic trace ID strategy. `establishSpan_` is correctly
+  in `Consensus.h` as planned.
+
+---
+
+# Phase 4b: Cross-Node Propagation (Future — Documentation Only)
+
+> **Goal**: Wire `TraceContextPropagator` for P2P messages so that proposals
+> and validations carry trace context between nodes. This enables true
+> distributed tracing where a proposal sent by Node A creates a child span
+> on Node B.
+>
+> **Status**: NOT IMPLEMENTED. The protobuf fields and propagator class exist
+> but are not wired. This section documents the design for future work.
+
+## Architecture
+
+```
+Node A (proposing)                         Node B (receiving)
+─────────────────                         ──────────────────
+consensus.round                           consensus.round
+├── propose()                             ├── peerProposal()
+│   └── TraceContextPropagator            │   └── TraceContextPropagator
+│       ::injectToProtobuf(               │       ::extractFromProtobuf(
+│           TMProposeSet.trace_context)   │           TMProposeSet.trace_context)
+│                                         │   └── span link → Node A's context
+└── validate()                            └── onValidation()
+    └── inject into TMValidation              └── extract from TMValidation
+```
+
+## Wiring Points
+
+| Message         | Inject Location                    | Extract Location                    | Protobuf Field             |
+| --------------- | ---------------------------------- | ----------------------------------- | -------------------------- |
+| `TMProposeSet`  | `Adaptor::propose()`               | `PeerImp::onMessage(TMProposeSet)`  | field 1001: `TraceContext` |
+| `TMValidation`  | `Adaptor::validate()`              | `PeerImp::onMessage(TMValidation)`  | field 1001: `TraceContext` |
+| `TMTransaction` | `NetworkOPs::processTransaction()` | `PeerImp::onMessage(TMTransaction)` | field 1001: `TraceContext` |
+
+## Span Link Semantics
+
+Received messages use **span links** (follows-from), NOT parent-child:
+
+- The receiver's processing span links to the sender's context
+- This preserves each node's independent trace tree
+- Cross-node correlation visible via linked traces in Tempo/Jaeger
+
+## Interaction with Deterministic Trace ID (Strategy A)
+
+When using deterministic trace_id (Phase 4a default), cross-node spans already
+share the same trace_id. P2P propagation adds **span-level** linking:
+
+- Without propagation: spans from different nodes appear in the same trace
+  (same trace_id) but without parent-child or follows-from relationships.
+- With propagation: spans have explicit links showing which proposal/validation
+  from Node A caused processing on Node B.
+
+## Prerequisites
+
+- Phase 4a (this task list) — establish phase tracing must be in place
+- `TraceContextPropagator` class (already exists in
+  `include/xrpl/telemetry/TraceContextPropagator.h`)
+- Protobuf `TraceContext` message (already exists, field 1001)

OpenTelemetryPlan/Phase5_IntegrationTest_taskList.md

@@ -0,0 +1,221 @@
+# Phase 5: Integration Test Task List
+
+> **Goal**: End-to-end verification of the complete telemetry pipeline using a
+> 6-node consensus network. Proves that RPC, transaction, and consensus spans
+> flow through the observability stack (otel-collector, Jaeger, Prometheus,
+> Grafana) under realistic conditions.
+>
+> **Scope**: Integration test script, manual testing plan, 6-node local network
+> setup, Jaeger/Prometheus/Grafana verification.
+>
+> **Branch**: `pratik/otel-phase5-docs-deployment`
+
+### Related Plan Documents
+
+| Document                                                         | Relevance                                  |
+| ---------------------------------------------------------------- | ------------------------------------------ |
+| [07-observability-backends.md](./07-observability-backends.md)   | Jaeger, Grafana, Prometheus setup          |
+| [05-configuration-reference.md](./05-configuration-reference.md) | Collector config, Docker Compose           |
+| [06-implementation-phases.md](./06-implementation-phases.md)     | Phase 5 tasks, definition of done          |
+| [Phase5_taskList.md](./Phase5_taskList.md)                       | Phase 5 main task list (5.6 = integration) |
+
+---
+
+## Task IT.1: Create Integration Test Script
+
+**Objective**: Automated bash script that stands up a 6-node xrpld network
+with telemetry, exercises all span categories, and verifies data in
+Jaeger/Prometheus.
+
+**What to do**:
+
+- Create `docker/telemetry/integration-test.sh`:
+  - Prerequisites check (docker, xrpld binary, curl, jq)
+  - Start observability stack via `docker compose`
+  - Generate 6 validator key pairs via temp standalone xrpld
+  - Generate 6 node configs + shared `validators.txt`
+  - Start 6 xrpld nodes in consensus mode (`--start`, no `-a`)
+  - Wait for all nodes to reach `"proposing"` state (120s timeout)
+
+**Key new file**: `docker/telemetry/integration-test.sh`
+
+**Verification**:
+
+- [ ] Script starts without errors
+- [ ] All 6 nodes reach "proposing" state
+- [ ] Observability stack is healthy (otel-collector, Jaeger, Prometheus, Grafana)
+
+---
+
+## Task IT.2: RPC Span Verification (Phase 2)
+
+**Objective**: Verify RPC spans flow through the telemetry pipeline.
+
+**What to do**:
+
+- Send `server_info`, `server_state`, `ledger` RPCs to node1 (port 5005)
+- Wait for batch export (5s)
+- Query Jaeger API for:
+  - `rpc.request` spans (ServerHandler::onRequest)
+  - `rpc.process` spans (ServerHandler::processRequest)
+  - `rpc.command.server_info` spans (callMethod)
+  - `rpc.command.server_state` spans (callMethod)
+  - `rpc.command.ledger` spans (callMethod)
+- Verify `xrpl.rpc.command` attribute present on `rpc.command.*` spans
+
+**Verification**:
+
+- [ ] Jaeger shows `rpc.request` traces
+- [ ] Jaeger shows `rpc.process` traces
+- [ ] Jaeger shows `rpc.command.*` traces with correct attributes
+
+---
+
+## Task IT.3: Transaction Span Verification (Phase 3)
+
+**Objective**: Verify transaction spans flow through the telemetry pipeline.
+
+**What to do**:
+
+- Get genesis account sequence via `account_info` RPC
+- Submit Payment transaction using genesis seed (`snoPBrXtMeMyMHUVTgbuqAfg1SUTb`)
+- Wait for consensus inclusion (10s)
+- Query Jaeger API for:
+  - `tx.process` spans (NetworkOPsImp::processTransaction) on submitting node
+  - `tx.receive` spans (PeerImp::handleTransaction) on peer nodes
+- Verify `xrpl.tx.hash` attribute on `tx.process` spans
+- Verify `xrpl.peer.id` attribute on `tx.receive` spans
+
+**Verification**:
+
+- [ ] Jaeger shows `tx.process` traces with `xrpl.tx.hash`
+- [ ] Jaeger shows `tx.receive` traces with `xrpl.peer.id`
+
+---
+
+## Task IT.4: Consensus Span Verification (Phase 4)
+
+**Objective**: Verify consensus spans flow through the telemetry pipeline.
+
+**What to do**:
+
+- Consensus runs automatically in 6-node network
+- Query Jaeger API for:
+  - `consensus.proposal.send` (Adaptor::propose)
+  - `consensus.ledger_close` (Adaptor::onClose)
+  - `consensus.accept` (Adaptor::onAccept)
+  - `consensus.validation.send` (Adaptor::validate)
+- Verify attributes:
+  - `xrpl.consensus.mode` on `consensus.ledger_close`
+  - `xrpl.consensus.proposers` on `consensus.accept`
+  - `xrpl.consensus.ledger.seq` on `consensus.validation.send`
+
+**Verification**:
+
+- [ ] Jaeger shows `consensus.ledger_close` traces with `xrpl.consensus.mode`
+- [ ] Jaeger shows `consensus.accept` traces with `xrpl.consensus.proposers`
+- [ ] Jaeger shows `consensus.proposal.send` traces
+- [ ] Jaeger shows `consensus.validation.send` traces
+
+---
+
+## Task IT.5: Spanmetrics Verification (Phase 5)
+
+**Objective**: Verify spanmetrics connector derives RED metrics from spans.
+
+**What to do**:
+
+- Query Prometheus for `traces_span_metrics_calls_total`
+- Query Prometheus for `traces_span_metrics_duration_milliseconds_count`
+- Verify Grafana loads at `http://localhost:3000`
+
+**Verification**:
+
+- [ ] Prometheus returns non-empty results for `traces_span_metrics_calls_total`
+- [ ] Prometheus returns non-empty results for duration histogram
+- [ ] Grafana UI accessible with dashboards visible
+
+---
+
+## Task IT.6: Manual Testing Plan
+
+**Objective**: Document how to run tests manually for future reference.
+
+**What to do**:
+
+- Create `docker/telemetry/TESTING.md` with:
+  - Prerequisites section
+  - Single-node standalone test (quick verification)
+  - 6-node consensus test (full verification)
+  - Expected span catalog (all 12 span names with attributes)
+  - Verification queries (Jaeger API, Prometheus API)
+  - Troubleshooting guide
+
+**Key new file**: `docker/telemetry/TESTING.md`
+
+**Verification**:
+
+- [ ] Document covers both single-node and multi-node testing
+- [ ] All 12 span names documented with source file and attributes
+- [ ] Troubleshooting section covers common failure modes
+
+---
+
+## Task IT.7: Run and Verify
+
+**Objective**: Execute the integration test and validate results.
+
+**What to do**:
+
+- Run `docker/telemetry/integration-test.sh` locally
+- Debug any failures
+- Leave stack running for manual verification
+- Share URLs:
+  - Jaeger: `http://localhost:16686`
+  - Grafana: `http://localhost:3000`
+  - Prometheus: `http://localhost:9090`
+
+**Verification**:
+
+- [ ] Script completes with all checks passing
+- [ ] Jaeger UI shows rippled service with all expected span names
+- [ ] Grafana dashboards load and show data
+
+---
+
+## Task IT.8: Commit
+
+**Objective**: Commit all new files to Phase 5 branch.
+
+**What to do**:
+
+- Run `pcc` (pre-commit checks)
+- Commit 3 new files to `pratik/otel-phase5-docs-deployment`
+
+**Verification**:
+
+- [ ] `pcc` passes
+- [ ] Commit created on Phase 5 branch
+
+---
+
+## Summary
+
+| Task | Description                   | New Files | Depends On |
+| ---- | ----------------------------- | --------- | ---------- |
+| IT.1 | Integration test script       | 1         | Phase 5    |
+| IT.2 | RPC span verification         | 0         | IT.1       |
+| IT.3 | Transaction span verification | 0         | IT.1       |
+| IT.4 | Consensus span verification   | 0         | IT.1       |
+| IT.5 | Spanmetrics verification      | 0         | IT.1       |
+| IT.6 | Manual testing plan           | 1         | --         |
+| IT.7 | Run and verify                | 0         | IT.1-IT.6  |
+| IT.8 | Commit                        | 0         | IT.7       |
+
+**Exit Criteria**:
+
+- [ ] All 6 xrpld nodes reach "proposing" state
+- [ ] All 11 expected span names visible in Jaeger
+- [ ] Spanmetrics available in Prometheus
+- [ ] Grafana dashboards show data
+- [ ] Manual testing plan document complete

OpenTelemetryPlan/Phase5_taskList.md

@@ -0,0 +1,241 @@
+# Phase 5: Documentation & Deployment Task List
+
+> **Goal**: Production readiness — Grafana dashboards, spanmetrics pipeline, operator runbook, alert definitions, and final integration testing. This phase ensures the telemetry system is useful and maintainable in production.
+>
+> **Scope**: Grafana dashboard definitions, OTel Collector spanmetrics connector, Prometheus integration, alert rules, operator documentation, and production-ready Docker Compose stack.
+>
+> **Branch**: `pratik/otel-phase5-docs-deployment` (from `pratik/otel-phase4-consensus-tracing`)
+
+### Related Plan Documents
+
+| Document                                                         | Relevance                                                                  |
+| ---------------------------------------------------------------- | -------------------------------------------------------------------------- |
+| [07-observability-backends.md](./07-observability-backends.md)   | Jaeger setup (§7.1), Grafana dashboards (§7.6), alerts (§7.6.3)            |
+| [05-configuration-reference.md](./05-configuration-reference.md) | Collector config (§5.5), production config (§5.5.2), Docker Compose (§5.6) |
+| [06-implementation-phases.md](./06-implementation-phases.md)     | Phase 5 tasks (§6.6), definition of done (§6.11.5)                         |
+
+---
+
+## Task 5.1: Add Spanmetrics Connector to OTel Collector
+
+**Objective**: Derive RED metrics (Rate, Errors, Duration) from trace spans automatically, enabling Grafana time-series dashboards.
+
+**What to do**:
+
+- Edit `docker/telemetry/otel-collector-config.yaml`:
+  - Add `spanmetrics` connector:
+    ```yaml
+    connectors:
+      spanmetrics:
+        histogram:
+          explicit:
+            buckets: [1ms, 5ms, 10ms, 25ms, 50ms, 100ms, 250ms, 500ms, 1s, 5s]
+        dimensions:
+          - name: xrpl.rpc.command
+          - name: xrpl.rpc.status
+          - name: xrpl.consensus.phase
+          - name: xrpl.tx.type
+    ```
+  - Add `prometheus` exporter:
+    ```yaml
+    exporters:
+      prometheus:
+        endpoint: 0.0.0.0:8889
+    ```
+  - Wire the pipeline:
+    ```yaml
+    service:
+      pipelines:
+        traces:
+          receivers: [otlp]
+          processors: [batch]
+          exporters: [debug, otlp/jaeger, spanmetrics]
+        metrics:
+          receivers: [spanmetrics]
+          exporters: [prometheus]
+    ```
+
+- Edit `docker/telemetry/docker-compose.yml`:
+  - Expose port `8889` on the collector for Prometheus scraping
+  - Add Prometheus service
+  - Add Prometheus as Grafana datasource
+
+**Key modified files**:
+
+- `docker/telemetry/otel-collector-config.yaml`
+- `docker/telemetry/docker-compose.yml`
+
+**Key new files**:
+
+- `docker/telemetry/prometheus.yml` (Prometheus scrape config)
+- `docker/telemetry/grafana/provisioning/datasources/prometheus.yaml`
+
+**Reference**:
+
+- [POC_taskList.md §Next Steps](./POC_taskList.md) — Metrics pipeline for Grafana dashboards
+
+---
+
+## Task 5.2: Create Grafana Dashboards
+
+**Objective**: Provide pre-built Grafana dashboards for RPC performance, transaction lifecycle, and consensus health.
+
+**What to do**:
+
+- Create `docker/telemetry/grafana/provisioning/dashboards/dashboards.yaml` (provisioning config)
+- Create dashboard JSON files:
+  1. **RPC Performance Dashboard** (`rpc-performance.json`):
+     - RPC request latency (p50/p95/p99) by command — histogram panel
+     - RPC throughput (requests/sec) by command — time series
+     - RPC error rate by command — bar gauge
+     - Top slowest RPC commands — table
+
+  2. **Transaction Overview Dashboard** (`transaction-overview.json`):
+     - Transaction processing rate — time series
+     - Transaction latency distribution — histogram
+     - Suppression rate (duplicates) — stat panel
+     - Transaction processing path (sync vs async) — pie chart
+
+  3. **Consensus Health Dashboard** (`consensus-health.json`):
+     - Consensus round duration — time series
+     - Phase duration breakdown (open/establish/accept) — stacked bar
+     - Proposals sent/received per round — stat panel
+     - Consensus mode distribution (proposing/observing) — pie chart
+
+- Store dashboards in `docker/telemetry/grafana/dashboards/`
+
+**Key new files**:
+
+- `docker/telemetry/grafana/provisioning/dashboards/dashboards.yaml`
+- `docker/telemetry/grafana/dashboards/rpc-performance.json`
+- `docker/telemetry/grafana/dashboards/transaction-overview.json`
+- `docker/telemetry/grafana/dashboards/consensus-health.json`
+
+**Reference**:
+
+- [07-observability-backends.md §7.6](./07-observability-backends.md) — Grafana dashboard specifications
+- [01-architecture-analysis.md §1.8.3](./01-architecture-analysis.md) — Dashboard panel examples
+
+---
+
+## Task 5.3: Define Alert Rules
+
+**Objective**: Create alert definitions for key telemetry anomalies.
+
+**What to do**:
+
+- Create `docker/telemetry/grafana/provisioning/alerting/alerts.yaml`:
+  - **RPC Latency Alert**: p99 latency > 1s for any command over 5 minutes
+  - **RPC Error Rate Alert**: Error rate > 5% for any command over 5 minutes
+  - **Consensus Duration Alert**: Round duration > 10s (warn), > 30s (critical)
+  - **Transaction Processing Alert**: Processing rate drops below threshold
+  - **Telemetry Pipeline Health**: No spans received for > 2 minutes
+
+**Key new files**:
+
+- `docker/telemetry/grafana/provisioning/alerting/alerts.yaml`
+
+**Reference**:
+
+- [07-observability-backends.md §7.6.3](./07-observability-backends.md) — Alert rule definitions
+
+---
+
+## Task 5.4: Production Collector Configuration
+
+**Objective**: Create a production-ready OTel Collector configuration with tail-based sampling and resource limits.
+
+**What to do**:
+
+- Create `docker/telemetry/otel-collector-config-production.yaml`:
+  - Tail-based sampling policy:
+    - Always sample errors and slow traces
+    - 10% base sampling rate for normal traces
+    - Always sample first trace for each unique RPC command
+  - Resource limits:
+    - Memory limiter processor (80% of available memory)
+    - Queued retry for export failures
+  - TLS configuration for production endpoints
+  - Health check endpoint
+
+**Key new files**:
+
+- `docker/telemetry/otel-collector-config-production.yaml`
+
+**Reference**:
+
+- [05-configuration-reference.md §5.5.2](./05-configuration-reference.md) — Production collector config
+
+---
+
+## Task 5.5: Operator Runbook
+
+**Objective**: Create operator documentation for managing the telemetry system in production.
+
+**What to do**:
+
+- Create `docs/telemetry-runbook.md`:
+  - **Setup**: How to enable telemetry in rippled
+  - **Configuration**: All config options with descriptions
+  - **Collector Deployment**: Docker Compose vs. Kubernetes vs. bare metal
+  - **Troubleshooting**: Common issues and resolutions
+    - No traces appearing
+    - High memory usage from telemetry
+    - Collector connection failures
+    - Sampling configuration tuning
+  - **Performance Tuning**: Batch size, queue size, sampling ratio guidelines
+  - **Upgrading**: How to upgrade OTel SDK and Collector versions
+
+**Key new files**:
+
+- `docs/telemetry-runbook.md`
+
+---
+
+## Task 5.6: Final Integration Testing
+
+**Objective**: Validate the complete telemetry stack end-to-end.
+
+**What to do**:
+
+1. Start full Docker stack (Collector, Jaeger, Grafana, Prometheus)
+2. Build rippled with `telemetry=ON`
+3. Run in standalone mode with telemetry enabled
+4. Generate RPC traffic and verify traces in Jaeger
+5. Verify dashboards populate in Grafana
+6. Verify alerts trigger correctly
+7. Test telemetry OFF path (no regressions)
+8. Run full test suite
+
+**Verification Checklist**:
+
+- [ ] Docker stack starts without errors
+- [ ] Traces appear in Jaeger with correct hierarchy
+- [ ] Grafana dashboards show metrics derived from spans
+- [ ] Prometheus scrapes spanmetrics successfully
+- [ ] Alerts can be triggered by simulated conditions
+- [ ] Build succeeds with telemetry ON and OFF
+- [ ] Full test suite passes
+
+---
+
+## Summary
+
+| Task | Description                        | New Files | Modified Files | Depends On |
+| ---- | ---------------------------------- | --------- | -------------- | ---------- |
+| 5.1  | Spanmetrics connector + Prometheus | 2         | 2              | Phase 4    |
+| 5.2  | Grafana dashboards                 | 4         | 0              | 5.1        |
+| 5.3  | Alert definitions                  | 1         | 0              | 5.1        |
+| 5.4  | Production collector config        | 1         | 0              | Phase 4    |
+| 5.5  | Operator runbook                   | 1         | 0              | Phase 4    |
+| 5.6  | Final integration testing          | 0         | 0              | 5.1-5.5    |
+
+**Parallel work**: Tasks 5.1, 5.4, and 5.5 can run in parallel. Tasks 5.2 and 5.3 depend on 5.1. Task 5.6 depends on all others.
+
+**Exit Criteria** (from [06-implementation-phases.md §6.11.5](./06-implementation-phases.md)):
+
+- [ ] Dashboards deployed and showing data
+- [ ] Alerts configured and tested
+- [ ] Operator documentation complete
+- [ ] Production collector config ready
+- [ ] Full test suite passes

OpenTelemetryPlan/Phase7_taskList.md

@@ -0,0 +1,256 @@
+# Phase 7: Native OTel Metrics Migration — Task List
+
+> **Goal**: Replace `StatsDCollector` with a native OpenTelemetry Metrics SDK implementation behind the existing `beast::insight::Collector` interface, eliminating the StatsD UDP dependency.
+>
+> **Scope**: New `OTelCollectorImpl` class, `CollectorManager` config change, OTel Collector pipeline update, Grafana dashboard metric name migration, integration tests.
+>
+> **Branch**: `pratik/otel-phase7-native-metrics` (from `pratik/otel-phase6-statsd`)
+
+### Related Plan Documents
+
+| Document                                                             | Relevance                                                       |
+| -------------------------------------------------------------------- | --------------------------------------------------------------- |
+| [06-implementation-phases.md](./06-implementation-phases.md)         | Phase 7 plan: motivation, architecture, exit criteria (§6.8)    |
+| [02-design-decisions.md](./02-design-decisions.md)                   | Collector interface design, beast::insight coexistence strategy |
+| [05-configuration-reference.md](./05-configuration-reference.md)     | `[insight]` and `[telemetry]` config sections                   |
+| [09-data-collection-reference.md](./09-data-collection-reference.md) | Complete metric inventory that must be preserved                |
+
+---
+
+## Task 7.1: Add OTel Metrics SDK to Build Dependencies
+
+**Objective**: Enable the OTel C++ Metrics SDK components in the build system.
+
+**What to do**:
+
+- Edit `conanfile.py`:
+  - Add OTel metrics SDK components to the dependency list when `telemetry=True`
+  - Components needed: `opentelemetry-cpp::metrics`, `opentelemetry-cpp::otlp_http_metric_exporter`
+
+- Edit `CMakeLists.txt` (telemetry section):
+  - Link `opentelemetry::metrics` and `opentelemetry::otlp_http_metric_exporter` targets
+
+**Key modified files**:
+
+- `conanfile.py`
+- `CMakeLists.txt` (or the relevant telemetry cmake target)
+
+**Reference**: [05-configuration-reference.md §5.3](./05-configuration-reference.md) — CMake integration
+
+---
+
+## Task 7.2: Implement OTelCollector Class
+
+**Objective**: Create the core `OTelCollector` implementation that maps beast::insight instruments to OTel Metrics SDK instruments.
+
+**What to do**:
+
+- Create `include/xrpl/beast/insight/OTelCollector.h`:
+  - Public factory: `static std::shared_ptr<OTelCollector> New(std::string const& endpoint, std::string const& prefix, beast::Journal journal)`
+  - Derives from `StatsDCollector` (or directly from `Collector` — TBD based on shared code)
+
+- Create `src/libxrpl/beast/insight/OTelCollector.cpp` (~400-500 lines):
+  - **OTelCounterImpl**: Wraps `opentelemetry::metrics::Counter<int64_t>`. `increment(amount)` calls `counter->Add(amount)`.
+  - **OTelGaugeImpl**: Uses `opentelemetry::metrics::ObservableGauge<uint64_t>` with an async callback. `set(value)` stores value atomically; callback reads it during collection.
+  - **OTelMeterImpl**: Wraps `opentelemetry::metrics::Counter<uint64_t>`. `increment(amount)` calls `counter->Add(amount)`. Semantically identical to Counter but unsigned.
+  - **OTelEventImpl**: Wraps `opentelemetry::metrics::Histogram<double>`. `notify(duration)` calls `histogram->Record(duration.count())`. Uses explicit bucket boundaries matching SpanMetrics: [1, 5, 10, 25, 50, 100, 250, 500, 1000, 5000] ms.
+  - **OTelHookImpl**: Stores handler function. Called during periodic metric collection (same 1s pattern via PeriodicMetricReader).
+  - **OTelCollectorImp**: Main class.
+    - Creates `MeterProvider` with `PeriodicMetricReader` (1s export interval)
+    - Creates `OtlpHttpMetricExporter` pointing to `[telemetry]` endpoint
+    - Sets resource attributes (service.name, service.instance.id) matching trace exporter
+    - Implements all `make_*()` factory methods
+    - Prefixes metric names with `[insight] prefix=` value
+
+- Guard all OTel SDK includes with `#ifdef XRPL_ENABLE_TELEMETRY` to compile to `NullCollector` equivalents when telemetry disabled.
+
+**Key new files**:
+
+- `include/xrpl/beast/insight/OTelCollector.h`
+- `src/libxrpl/beast/insight/OTelCollector.cpp`
+
+**Key patterns to follow**:
+
+- Match `StatsDCollector.cpp` structure: private impl classes, intrusive list for metrics, strand-based thread safety
+- Match existing telemetry code style from `src/libxrpl/telemetry/Telemetry.cpp`
+- Use RAII for MeterProvider lifecycle (shutdown on destructor)
+
+**Reference**: [04-code-samples.md](./04-code-samples.md) — code style and patterns
+
+---
+
+## Task 7.3: Update CollectorManager
+
+**Objective**: Add `server=otel` config option to route metric creation to the new OTel backend.
+
+**What to do**:
+
+- Edit `src/xrpld/app/main/CollectorManager.cpp`:
+  - In the constructor, add a third branch after `server == "statsd"`:
+    ```cpp
+    else if (server == "otel")
+    {
+        // Read endpoint from [telemetry] section
+        auto const endpoint = get(telemetryParams, "endpoint",
+            "http://localhost:4318/v1/metrics");
+        std::string const& prefix(get(params, "prefix"));
+        m_collector = beast::insight::OTelCollector::New(
+            endpoint, prefix, journal);
+    }
+    ```
+  - This requires access to the `[telemetry]` config section — may need to pass it as a parameter or read from Application config.
+
+- Edit `src/xrpld/app/main/CollectorManager.h`:
+  - Add `#include <xrpl/beast/insight/OTelCollector.h>`
+
+**Key modified files**:
+
+- `src/xrpld/app/main/CollectorManager.cpp`
+- `src/xrpld/app/main/CollectorManager.h`
+
+---
+
+## Task 7.4: Update OTel Collector Configuration
+
+**Objective**: Add a metrics pipeline to the OTLP receiver and remove the StatsD receiver dependency.
+
+**What to do**:
+
+- Edit `docker/telemetry/otel-collector-config.yaml`:
+  - Remove `statsd` receiver (no longer needed when `server=otel`)
+  - Add metrics pipeline under `service.pipelines`:
+    ```yaml
+    metrics:
+      receivers: [otlp, spanmetrics]
+      processors: [batch]
+      exporters: [prometheus]
+    ```
+  - The OTLP receiver already listens on :4318 — it just needs to be added to the metrics pipeline receivers.
+  - Keep `spanmetrics` connector in the metrics pipeline so span-derived RED metrics continue working.
+
+- Edit `docker/telemetry/docker-compose.yml`:
+  - Remove UDP :8125 port mapping from otel-collector service
+  - Update rippled service config: change `[insight] server=statsd` to `server=otel`
+
+**Key modified files**:
+
+- `docker/telemetry/otel-collector-config.yaml`
+- `docker/telemetry/docker-compose.yml`
+
+**Note**: Keep a commented-out `statsd` receiver block for operators who need backward compatibility.
+
+---
+
+## Task 7.5: Preserve Metric Names in Prometheus
+
+**Objective**: Ensure existing Grafana dashboards continue working with identical metric names.
+
+**What to do**:
+
+- In `OTelCollector.cpp`, construct OTel instrument names to match existing Prometheus metric names:
+  - beast::insight `make_gauge("LedgerMaster", "Validated_Ledger_Age")` → OTel instrument name: `rippled_LedgerMaster_Validated_Ledger_Age`
+  - The prefix + group + name concatenation must produce the same string as `StatsDCollector`'s format
+  - Use underscores as separators (matching StatsD convention)
+
+- Verify in integration test that key Prometheus queries still return data:
+  - `rippled_LedgerMaster_Validated_Ledger_Age`
+  - `rippled_Peer_Finder_Active_Inbound_Peers`
+  - `rippled_rpc_requests`
+
+**Key consideration**: OTel Prometheus exporter may normalize metric names differently than StatsD receiver. Test this early (Task 7.2) and adjust naming strategy if needed. The OTel SDK's Prometheus exporter adds `_total` suffix to counters and converts dots to underscores — match existing conventions.
+
+---
+
+## Task 7.6: Update Grafana Dashboards
+
+**Objective**: Update the 3 StatsD dashboards if any metric names change due to OTLP export format differences.
+
+**What to do**:
+
+- If Task 7.5 confirms metric names are preserved exactly, no dashboard changes needed.
+- If OTLP export produces different names (e.g., `_total` suffix on counters), update:
+  - `docker/telemetry/grafana/dashboards/statsd-node-health.json`
+  - `docker/telemetry/grafana/dashboards/statsd-network-traffic.json`
+  - `docker/telemetry/grafana/dashboards/statsd-rpc-pathfinding.json`
+- Rename dashboard titles from "StatsD" to "System Metrics" or similar (since they're no longer StatsD-sourced).
+
+**Key modified files**:
+
+- `docker/telemetry/grafana/dashboards/statsd-*.json` (3 files, conditionally)
+
+---
+
+## Task 7.7: Update Integration Tests
+
+**Objective**: Verify the full OTLP metrics pipeline end-to-end.
+
+**What to do**:
+
+- Edit `docker/telemetry/integration-test.sh`:
+  - Update test config to use `[insight] server=otel`
+  - Verify metrics arrive in Prometheus via OTLP (not StatsD)
+  - Add check that StatsD receiver is no longer required
+  - Preserve all existing metric presence checks
+
+**Key modified files**:
+
+- `docker/telemetry/integration-test.sh`
+
+---
+
+## Task 7.8: Update Documentation
+
+**Objective**: Update all plan docs, runbook, and reference docs to reflect the migration.
+
+**What to do**:
+
+- Edit `docs/telemetry-runbook.md`:
+  - Update `[insight]` config examples to show `server=otel`
+  - Update troubleshooting section (no more StatsD UDP debugging)
+
+- Edit `OpenTelemetryPlan/09-data-collection-reference.md`:
+  - Update Data Flow Overview diagram (remove StatsD receiver)
+  - Update Section 2 header from "StatsD Metrics" to "System Metrics (OTel native)"
+  - Update config examples
+
+- Edit `OpenTelemetryPlan/05-configuration-reference.md`:
+  - Add `server=otel` option to `[insight]` section docs
+
+- Edit `docker/telemetry/TESTING.md`:
+  - Update setup instructions to use `server=otel`
+
+**Key modified files**:
+
+- `docs/telemetry-runbook.md`
+- `OpenTelemetryPlan/09-data-collection-reference.md`
+- `OpenTelemetryPlan/05-configuration-reference.md`
+- `docker/telemetry/TESTING.md`
+
+---
+
+## Summary Table
+
+| Task | Description                            | New Files | Modified Files | Effort | Risk   | Depends On |
+| ---- | -------------------------------------- | --------- | -------------- | ------ | ------ | ---------- |
+| 7.1  | Add OTel Metrics SDK to build deps     | 0         | 2              | 0.5d   | Low    | —          |
+| 7.2  | Implement OTelCollector class          | 2         | 0              | 3d     | Medium | 7.1        |
+| 7.3  | Update CollectorManager config routing | 0         | 2              | 0.5d   | Low    | 7.2        |
+| 7.4  | Update OTel Collector YAML and Docker  | 0         | 2              | 0.5d   | Low    | 7.3        |
+| 7.5  | Preserve metric names in Prometheus    | 0         | 1              | 1d     | Medium | 7.2        |
+| 7.6  | Update Grafana dashboards (if needed)  | 0         | 3              | 1d     | Low    | 7.5        |
+| 7.7  | Update integration tests               | 0         | 1              | 0.5d   | Low    | 7.4        |
+| 7.8  | Update documentation                   | 0         | 4              | 1d     | Low    | 7.6        |
+
+**Total Effort**: 8 days
+
+**Parallel work**: Tasks 7.4 and 7.5 can run in parallel after 7.2/7.3 complete. Task 7.6 depends on 7.5's findings. Tasks 7.7 and 7.8 can run in parallel after 7.6.
+
+**Exit Criteria** (from [06-implementation-phases.md §6.8](./06-implementation-phases.md)):
+
+- [ ] All 255+ metrics visible in Prometheus via OTLP pipeline (no StatsD receiver)
+- [ ] `server=otel` is the default in development docker-compose
+- [ ] `server=statsd` still works as a fallback
+- [ ] Existing Grafana dashboards display data correctly
+- [ ] Integration test passes with OTLP-only metrics pipeline
+- [ ] No performance regression vs StatsD baseline (< 1% CPU overhead)
+- [ ] Deferred Task 6.1 (`|m` wire format) no longer relevant — Meter mapped to OTel Counter

OpenTelemetryPlan/Phase8_taskList.md

@@ -0,0 +1,234 @@
+# Phase 8: Log-Trace Correlation and Centralized Log Ingestion — Task List
+
+> **Goal**: Inject trace context (trace_id, span_id) into rippled's Journal log output for log-trace correlation, and add OTel Collector filelog receiver to ingest logs into Grafana Loki for unified observability.
+>
+> **Scope**: Two independent sub-phases — 8a (code change: trace_id in logs) and 8b (infra only: filelog receiver to Loki). No changes to the `beast::Journal` public API.
+>
+> **Branch**: `pratik/otel-phase8-log-correlation` (from `pratik/otel-phase7-native-metrics`)
+
+### Related Plan Documents
+
+| Document                                                         | Relevance                                                      |
+| ---------------------------------------------------------------- | -------------------------------------------------------------- |
+| [06-implementation-phases.md](./06-implementation-phases.md)     | Phase 8 plan: motivation, architecture, exit criteria (§6.8.1) |
+| [07-observability-backends.md](./07-observability-backends.md)   | Loki backend recommendation, Grafana data source provisioning  |
+| [Phase7_taskList.md](./Phase7_taskList.md)                       | Prerequisite — native OTel metrics pipeline must be working    |
+| [05-configuration-reference.md](./05-configuration-reference.md) | `[telemetry]` config (trace_id injection toggle)               |
+
+---
+
+## Task 8.1: Inject trace_id into Logs::format()
+
+**Objective**: Add OTel trace context to every log line that is emitted within an active span.
+
+**What to do**:
+
+- Edit `src/libxrpl/basics/Log.cpp`:
+  - In `Logs::format()` (around line 346), after severity is appended, check for active OTel span:
+    ```cpp
+    #ifdef XRPL_ENABLE_TELEMETRY
+    auto span = opentelemetry::trace::GetSpan(
+        opentelemetry::context::RuntimeContext::GetCurrent());
+    auto ctx = span->GetContext();
+    if (ctx.IsValid())
+    {
+        // Append trace context as structured fields
+        char traceId[33], spanId[17];
+        ctx.trace_id().ToLowerBase16(traceId);
+        ctx.span_id().ToLowerBase16(spanId);
+        output += "trace_id=";
+        output.append(traceId, 32);
+        output += " span_id=";
+        output.append(spanId, 16);
+        output += ' ';
+    }
+    #endif
+    ```
+  - Add `#include` for OTel context headers, guarded by `#ifdef XRPL_ENABLE_TELEMETRY`
+
+- Edit `include/xrpl/basics/Log.h`:
+  - No changes needed — format() signature unchanged
+
+**Key modified files**:
+
+- `src/libxrpl/basics/Log.cpp`
+
+**Performance note**: `GetSpan()` and `GetContext()` are thread-local reads with no locking — measured at <10ns per call. With ~1000 JLOG calls/min, this adds <10us/min of overhead.
+
+---
+
+## Task 8.2: Add Loki to Docker Compose Stack
+
+**Objective**: Add Grafana Loki as a log storage backend in the development observability stack.
+
+**What to do**:
+
+- Edit `docker/telemetry/docker-compose.yml`:
+  - Add Loki service:
+    ```yaml
+    loki:
+      image: grafana/loki:2.9.0
+      ports:
+        - "3100:3100"
+      command: -config.file=/etc/loki/local-config.yaml
+    ```
+  - Add Loki as a Grafana data source in provisioning
+
+- Create `docker/telemetry/grafana/provisioning/datasources/loki.yaml`:
+  - Configure Loki data source with derived fields linking `trace_id` to Tempo
+
+**Key new files**:
+
+- `docker/telemetry/grafana/provisioning/datasources/loki.yaml`
+
+**Key modified files**:
+
+- `docker/telemetry/docker-compose.yml`
+
+---
+
+## Task 8.3: Add Filelog Receiver to OTel Collector
+
+**Objective**: Configure the OTel Collector to tail rippled's log file and export to Loki.
+
+**What to do**:
+
+- Edit `docker/telemetry/otel-collector-config.yaml`:
+  - Add `filelog` receiver:
+    ```yaml
+    receivers:
+      filelog:
+        include: [/var/log/rippled/debug.log]
+        operators:
+          - type: regex_parser
+            regex: '^(?P<timestamp>\S+)\s+(?P<partition>\S+):(?P<severity>\S+)\s+(?:trace_id=(?P<trace_id>[a-f0-9]+)\s+span_id=(?P<span_id>[a-f0-9]+)\s+)?(?P<message>.*)$'
+            timestamp:
+              parse_from: attributes.timestamp
+              layout: "%Y-%m-%dT%H:%M:%S.%fZ"
+    ```
+  - Add logs pipeline:
+    ```yaml
+    service:
+      pipelines:
+        logs:
+          receivers: [filelog]
+          processors: [batch]
+          exporters: [otlp/loki]
+    ```
+  - Add Loki exporter:
+    ```yaml
+    exporters:
+      otlp/loki:
+        endpoint: loki:3100
+        tls:
+          insecure: true
+    ```
+
+- Mount rippled's log directory into the collector container via docker-compose volume
+
+**Key modified files**:
+
+- `docker/telemetry/otel-collector-config.yaml`
+- `docker/telemetry/docker-compose.yml`
+
+---
+
+## Task 8.4: Configure Grafana Trace-to-Log Correlation
+
+**Objective**: Enable one-click navigation from Tempo traces to Loki logs in Grafana.
+
+**What to do**:
+
+- Edit Grafana Tempo data source provisioning to add `tracesToLogs` configuration:
+
+  ```yaml
+  tracesToLogs:
+    datasourceUid: loki
+    filterByTraceID: true
+    filterBySpanID: false
+    tags: ["partition", "severity"]
+  ```
+
+- Edit Grafana Loki data source provisioning to add `derivedFields` linking trace_id back to Tempo:
+  ```yaml
+  derivedFields:
+    - datasourceUid: tempo
+      matcherRegex: "trace_id=(\\w+)"
+      name: TraceID
+      url: "$${__value.raw}"
+  ```
+
+**Key modified files**:
+
+- `docker/telemetry/grafana/provisioning/datasources/loki.yaml`
+- `docker/telemetry/grafana/provisioning/datasources/` (Tempo data source file)
+
+---
+
+## Task 8.5: Update Integration Tests
+
+**Objective**: Verify trace_id appears in logs and Loki correlation works.
+
+**What to do**:
+
+- Edit `docker/telemetry/integration-test.sh`:
+  - After sending RPC requests (which create spans), grep rippled's log output for `trace_id=`
+  - Verify trace_id matches a trace visible in Jaeger
+  - Optionally: query Loki via API to confirm log ingestion
+
+**Key modified files**:
+
+- `docker/telemetry/integration-test.sh`
+
+---
+
+## Task 8.6: Update Documentation
+
+**Objective**: Document the log correlation feature in runbook and reference docs.
+
+**What to do**:
+
+- Edit `docs/telemetry-runbook.md`:
+  - Add "Log-Trace Correlation" section explaining how to use Grafana Tempo -> Loki linking
+  - Add LogQL query examples for filtering by trace_id
+
+- Edit `OpenTelemetryPlan/09-data-collection-reference.md`:
+  - Add new section "3. Log Correlation" between SpanMetrics and StatsD sections
+  - Document the log format with trace_id injection
+  - Document Loki as a new backend
+
+- Edit `docker/telemetry/TESTING.md`:
+  - Add log correlation verification steps
+
+**Key modified files**:
+
+- `docs/telemetry-runbook.md`
+- `OpenTelemetryPlan/09-data-collection-reference.md`
+- `docker/telemetry/TESTING.md`
+
+---
+
+## Summary Table
+
+| Task | Description                                | Sub-Phase | New Files | Modified Files | Effort | Risk   | Depends On |
+| ---- | ------------------------------------------ | --------- | --------- | -------------- | ------ | ------ | ---------- |
+| 8.1  | Inject trace_id into Logs::format()        | 8a        | 0         | 1              | 1d     | Low    | Phase 7    |
+| 8.2  | Add Loki to Docker Compose stack           | 8b        | 1         | 1              | 0.5d   | Low    | --         |
+| 8.3  | Add filelog receiver to OTel Collector     | 8b        | 0         | 2              | 1d     | Medium | 8.1, 8.2   |
+| 8.4  | Configure Grafana trace-to-log correlation | 8b        | 0         | 2              | 0.5d   | Low    | 8.3        |
+| 8.5  | Update integration tests                   | 8a + 8b   | 0         | 1              | 0.5d   | Low    | 8.4        |
+| 8.6  | Update documentation                       | 8a + 8b   | 0         | 3              | 1d     | Low    | 8.5        |
+
+**Total Effort**: 4.5 days
+
+**Parallel work**: Task 8.2 (Loki infra) can run in parallel with Task 8.1 (code change). Tasks 8.3-8.6 are sequential.
+
+**Exit Criteria** (from [06-implementation-phases.md §6.8.1](./06-implementation-phases.md)):
+
+- [ ] Log lines within active spans contain `trace_id=<hex> span_id=<hex>`
+- [ ] Log lines outside spans have no trace context (no empty fields)
+- [ ] Loki ingests rippled logs via OTel Collector filelog receiver
+- [ ] Grafana Tempo -> Loki one-click correlation works
+- [ ] Grafana Loki -> Tempo reverse lookup works via derived field
+- [ ] Integration test verifies trace_id presence in logs
+- [ ] No performance regression from trace_id injection (< 0.1% overhead)

OpenTelemetryPlan/Phase9_taskList.md

@@ -0,0 +1,329 @@
+# Phase 9: Internal Metric Instrumentation Gap Fill — Task List
+
+> **Status**: Future Enhancement
+>
+> **Goal**: Instrument rippled to emit ~50+ metrics that exist in `get_counts`/`server_info`/TxQ/PerfLog but currently lack time-series export via the OTel or beast::insight pipelines.
+>
+> **Scope**: Hybrid approach — extend `beast::insight` for metrics near existing registrations, use OTel Metrics SDK `ObservableGauge` callbacks for new categories (TxQ, PerfLog, CountedObjects).
+>
+> **Branch**: `pratik/otel-phase9-metric-gap-fill` (from `pratik/otel-phase8-log-correlation`)
+>
+> **Depends on**: Phase 7 (native OTel metrics pipeline) and Phase 8 (log-trace correlation)
+
+### Related Plan Documents
+
+| Document                                                             | Relevance                                                      |
+| -------------------------------------------------------------------- | -------------------------------------------------------------- |
+| [06-implementation-phases.md](./06-implementation-phases.md)         | Phase 9 plan: motivation, architecture, exit criteria (§6.8.2) |
+| [09-data-collection-reference.md](./09-data-collection-reference.md) | Current metric inventory + future metrics section              |
+| [Phase7_taskList.md](./Phase7_taskList.md)                           | Prerequisite — OTel Metrics SDK and `OTelCollector` class      |
+| [Phase8_taskList.md](./Phase8_taskList.md)                           | Prerequisite — log-trace correlation                           |
+
+### Third-Party Consumer Context
+
+These metrics serve multiple external consumer categories identified during research:
+
+| Consumer Category         | Key Metrics They Need                                           |
+| ------------------------- | --------------------------------------------------------------- |
+| **Exchanges**             | Fee escalation levels, TxQ depth, settlement latency            |
+| **Payment Processors**    | Load factors, io_latency, transaction throughput                |
+| **Analytics Providers**   | NodeStore I/O, cache hit rates, counted objects                 |
+| **Validators/Operators**  | Per-job execution times, PerfLog RPC counters, consensus timing |
+| **Academic Researchers**  | Consensus performance time-series, fee market dynamics          |
+| **Institutional Custody** | Server health scores, reserve calculations, node availability   |
+
+---
+
+## Task 9.1: NodeStore I/O Metrics
+
+**Objective**: Export node store read/write performance as time-series metrics.
+
+**What to do**:
+
+- In `src/libxrpl/nodestore/Database.cpp`, extend existing `beast::insight` registrations to add:
+  - Gauge: `node_reads_total` (cumulative read operations)
+  - Gauge: `node_reads_hit` (cache-served reads)
+  - Gauge: `node_writes` (cumulative write operations)
+  - Gauge: `node_written_bytes` (cumulative bytes written)
+  - Gauge: `node_read_bytes` (cumulative bytes read)
+  - Gauge: `node_reads_duration_us` (cumulative read time in microseconds)
+  - Gauge: `write_load` (current write load score)
+  - Gauge: `read_queue` (items in read queue)
+
+- These values are already computed in `Database::getCountsJson()` (line ~236). Wire the same counters to `beast::insight` hooks.
+
+**Key modified files**:
+
+- `src/libxrpl/nodestore/Database.cpp`
+- `src/libxrpl/nodestore/Database.h` (add insight members)
+
+**Derived Prometheus metrics**: `rippled_nodestore_reads_total`, `rippled_nodestore_reads_hit`, `rippled_nodestore_write_load`, etc.
+
+**Grafana dashboard**: Add "NodeStore I/O" panel group to _Node Health_ dashboard.
+
+---
+
+## Task 9.2: Cache Hit Rate Metrics
+
+**Objective**: Export SHAMap and ledger cache performance as time-series gauges.
+
+**What to do**:
+
+- Register OTel `ObservableGauge` callbacks (via Phase 7's `OTelCollector`) for:
+  - `SLE_hit_rate` — SLE cache hit rate (0.0–1.0)
+  - `ledger_hit_rate` — Ledger object cache hit rate
+  - `AL_hit_rate` — AcceptedLedger cache hit rate
+  - `treenode_cache_size` — SHAMap TreeNode cache size (entries)
+  - `treenode_track_size` — Tracked tree nodes
+  - `fullbelow_size` — FullBelow cache size
+
+- The callback should read from the same sources as `GetCounts.cpp` handler (line ~43).
+
+- Create a centralized `MetricsRegistry` class that holds all OTel async gauge registrations, polled at 10-second intervals by the `PeriodicMetricReader`.
+
+**Key modified files**:
+
+- New: `src/xrpld/telemetry/MetricsRegistry.h` / `.cpp`
+- `src/xrpld/rpc/handlers/GetCounts.cpp` (extract shared access methods)
+- `src/xrpld/app/main/Application.cpp` (register MetricsRegistry at startup)
+
+**Derived Prometheus metrics**: `rippled_cache_SLE_hit_rate`, `rippled_cache_ledger_hit_rate`, `rippled_cache_treenode_size`, etc.
+
+---
+
+## Task 9.3: Transaction Queue (TxQ) Metrics
+
+**Objective**: Export TxQ depth, capacity, and fee escalation levels as time-series.
+
+**What to do**:
+
+- Register OTel `ObservableGauge` callbacks for TxQ state (from `TxQ.h` line ~143):
+  - `txq_count` — Current transactions in queue
+  - `txq_max_size` — Maximum queue capacity
+  - `txq_in_ledger` — Transactions in current open ledger
+  - `txq_per_ledger` — Expected transactions per ledger
+  - `txq_reference_fee_level` — Reference fee level
+  - `txq_min_processing_fee_level` — Minimum fee to get processed
+  - `txq_med_fee_level` — Median fee level in queue
+  - `txq_open_ledger_fee_level` — Open ledger fee escalation level
+
+- Add to the `MetricsRegistry` (Task 9.2).
+
+**Key modified files**:
+
+- `src/xrpld/telemetry/MetricsRegistry.cpp` (add TxQ callbacks)
+- `src/xrpld/app/tx/detail/TxQ.h` (expose metrics accessor if needed)
+
+**Derived Prometheus metrics**: `rippled_txq_count`, `rippled_txq_max_size`, `rippled_txq_open_ledger_fee_level`, etc.
+
+**Grafana dashboard**: New _Fee Market & TxQ_ dashboard (`rippled-fee-market`).
+
+---
+
+## Task 9.4: PerfLog Per-RPC Method Metrics
+
+**Objective**: Export per-RPC-method call counts and latency as OTel metrics.
+
+**What to do**:
+
+- Register OTel instruments for PerfLog RPC counters (from `PerfLogImp.cpp` line ~63):
+  - Counter: `rpc_method_started_total{method="<name>"}` — calls started
+  - Counter: `rpc_method_finished_total{method="<name>"}` — calls completed
+  - Counter: `rpc_method_errored_total{method="<name>"}` — calls errored
+  - Histogram: `rpc_method_duration_us{method="<name>"}` — execution time distribution
+
+- Use OTel `Counter<int64_t>` and `Histogram<double>` instruments with `method` attribute label.
+
+- Hook into the existing PerfLog callback mechanism rather than adding new instrumentation points.
+
+**Key modified files**:
+
+- `src/xrpld/perflog/detail/PerfLogImp.cpp` (add OTel instrument updates alongside existing JSON counters)
+- `src/xrpld/telemetry/MetricsRegistry.cpp` (register instruments)
+
+**Derived Prometheus metrics**: `rippled_rpc_method_started_total{method="server_info"}`, `rippled_rpc_method_duration_us_bucket{method="ledger"}`, etc.
+
+**Grafana dashboard**: Add "Per-Method RPC Breakdown" panel group to _RPC Performance_ dashboard.
+
+---
+
+## Task 9.5: PerfLog Per-Job-Type Metrics
+
+**Objective**: Export per-job-type queue and execution metrics.
+
+**What to do**:
+
+- Register OTel instruments for PerfLog job counters:
+  - Counter: `job_queued_total{job_type="<name>"}` — jobs queued
+  - Counter: `job_started_total{job_type="<name>"}` — jobs started
+  - Counter: `job_finished_total{job_type="<name>"}` — jobs completed
+  - Histogram: `job_queued_duration_us{job_type="<name>"}` — time spent waiting in queue
+  - Histogram: `job_running_duration_us{job_type="<name>"}` — execution time distribution
+
+- Hook into PerfLog's existing job tracking alongside Task 9.4.
+
+**Key modified files**:
+
+- `src/xrpld/perflog/detail/PerfLogImp.cpp`
+- `src/xrpld/telemetry/MetricsRegistry.cpp`
+
+**Derived Prometheus metrics**: `rippled_job_queued_total{job_type="ledgerData"}`, `rippled_job_running_duration_us_bucket{job_type="transaction"}`, etc.
+
+**Grafana dashboard**: New _Job Queue Analysis_ dashboard (`rippled-job-queue`).
+
+---
+
+## Task 9.6: Counted Object Instance Metrics
+
+**Objective**: Export live instance counts for key internal object types.
+
+**What to do**:
+
+- Register OTel `ObservableGauge` callbacks for `CountedObject<T>` instance counts:
+  - `object_count{type="Transaction"}` — live Transaction objects
+  - `object_count{type="Ledger"}` — live Ledger objects
+  - `object_count{type="NodeObject"}` — live NodeObject instances
+  - `object_count{type="STTx"}` — serialized transaction objects
+  - `object_count{type="STLedgerEntry"}` — serialized ledger entries
+  - `object_count{type="InboundLedger"}` — ledgers being fetched
+  - `object_count{type="Pathfinder"}` — active pathfinding computations
+  - `object_count{type="PathRequest"}` — active path requests
+  - `object_count{type="HashRouterEntry"}` — hash router entries
+
+- The `CountedObject` template already tracks these via atomic counters. The callback just reads the current counts.
+
+**Key modified files**:
+
+- `src/xrpld/telemetry/MetricsRegistry.cpp` (add counted object callbacks)
+- `include/xrpl/basics/CountedObject.h` (may need static accessor for iteration)
+
+**Derived Prometheus metrics**: `rippled_object_count{type="Transaction"}`, `rippled_object_count{type="NodeObject"}`, etc.
+
+**Grafana dashboard**: Add "Object Instance Counts" panel to _Node Health_ dashboard.
+
+---
+
+## Task 9.7: Fee Escalation & Load Factor Metrics
+
+**Objective**: Export the full load factor breakdown as time-series.
+
+**What to do**:
+
+- Register OTel `ObservableGauge` callbacks for load factors (from `NetworkOPs.cpp` line ~2694):
+  - `load_factor` — combined transaction cost multiplier
+  - `load_factor_server` — server + cluster + network contribution
+  - `load_factor_local` — local server load only
+  - `load_factor_net` — network-wide load estimate
+  - `load_factor_cluster` — cluster peer load
+  - `load_factor_fee_escalation` — open ledger fee escalation
+  - `load_factor_fee_queue` — queue entry fee level
+
+- These overlap with some existing StatsD metrics but provide finer granularity (individual factor breakdown vs. combined value).
+
+**Key modified files**:
+
+- `src/xrpld/telemetry/MetricsRegistry.cpp`
+- `src/xrpld/app/misc/NetworkOPs.cpp` (expose load factor accessors if needed)
+
+**Derived Prometheus metrics**: `rippled_load_factor`, `rippled_load_factor_fee_escalation`, etc.
+
+**Grafana dashboard**: Add "Load Factor Breakdown" panel to _Fee Market & TxQ_ dashboard.
+
+---
+
+## Task 9.8: New Grafana Dashboards
+
+**Objective**: Create Grafana dashboards for the new metric categories.
+
+**What to do**:
+
+- Create 2 new dashboards:
+  1. **Fee Market & TxQ** (`rippled-fee-market`) — TxQ depth/capacity, fee levels, load factor breakdown, fee escalation timeline
+  2. **Job Queue Analysis** (`rippled-job-queue`) — Per-job-type rates, queue wait times, execution times, job queue depth
+
+- Update 2 existing dashboards:
+  1. **Node Health** (`rippled-statsd-node-health`) — Add NodeStore I/O panels, cache hit rate panels, object instance counts
+  2. **RPC Performance** (`rippled-rpc-perf`) — Add per-method RPC breakdown panels
+
+**Key modified files**:
+
+- New: `docker/telemetry/grafana/dashboards/rippled-fee-market.json`
+- New: `docker/telemetry/grafana/dashboards/rippled-job-queue.json`
+- `docker/telemetry/grafana/dashboards/rippled-statsd-node-health.json`
+- `docker/telemetry/grafana/dashboards/rippled-rpc-perf.json`
+
+---
+
+## Task 9.9: Update Documentation
+
+**Objective**: Update telemetry reference docs with all new metrics.
+
+**What to do**:
+
+- Update `OpenTelemetryPlan/09-data-collection-reference.md`:
+  - Add new section for OTel SDK-exported metrics (NodeStore, cache, TxQ, PerfLog, CountedObjects, load factors)
+  - Update Grafana dashboard reference table (add 2 new dashboards)
+  - Add Prometheus query examples for new metrics
+
+- Update `docs/telemetry-runbook.md`:
+  - Add alerting rules for new metrics (NodeStore write_load, TxQ capacity, cache hit rate degradation)
+  - Add troubleshooting entries for new metric categories
+
+**Key modified files**:
+
+- `OpenTelemetryPlan/09-data-collection-reference.md`
+- `docs/telemetry-runbook.md`
+
+---
+
+## Task 9.10: Integration Tests
+
+**Objective**: Verify all new metrics appear in Prometheus after a test workload.
+
+**What to do**:
+
+- Extend the existing telemetry integration test:
+  - Start rippled with `[telemetry] enabled=1` and `[insight] server=otel`
+  - Submit a batch of RPC calls and transactions
+  - Query Prometheus for each new metric family
+  - Assert non-zero values for: NodeStore reads, cache hit rates, TxQ count, PerfLog RPC counters, object counts, load factors
+
+- Add unit tests for the `MetricsRegistry` class:
+  - Verify callback registration and deregistration
+  - Verify metric values match `get_counts` JSON output
+  - Verify graceful behavior when telemetry is disabled
+
+**Key modified files**:
+
+- `src/test/telemetry/MetricsRegistry_test.cpp` (new)
+- Existing integration test script (extend assertions)
+
+---
+
+## Effort Summary
+
+| Task | Description                              | Effort | Risk   |
+| ---- | ---------------------------------------- | ------ | ------ |
+| 9.1  | NodeStore I/O metrics                    | 1d     | Low    |
+| 9.2  | Cache hit rate metrics + MetricsRegistry | 2d     | Medium |
+| 9.3  | TxQ metrics                              | 1d     | Low    |
+| 9.4  | PerfLog per-RPC metrics                  | 1.5d   | Medium |
+| 9.5  | PerfLog per-job metrics                  | 1d     | Low    |
+| 9.6  | Counted object instance metrics          | 0.5d   | Low    |
+| 9.7  | Fee escalation & load factor metrics     | 0.5d   | Low    |
+| 9.8  | New Grafana dashboards                   | 2d     | Low    |
+| 9.9  | Update documentation                     | 1d     | Low    |
+| 9.10 | Integration tests                        | 1.5d   | Medium |
+
+**Total Effort**: 12 days
+
+## Exit Criteria
+
+- [ ] All ~50 new metrics visible in Prometheus via OTLP pipeline
+- [ ] `MetricsRegistry` class registers/deregisters cleanly with OTel SDK
+- [ ] Async gauge callbacks execute at 10s intervals without performance impact
+- [ ] 2 new Grafana dashboards operational (Fee Market, Job Queue)
+- [ ] 2 existing dashboards updated with new panel groups
+- [ ] Integration test validates all new metric families are non-zero
+- [ ] No performance regression (< 0.5% CPU overhead from new callbacks)
+- [ ] Documentation updated with full new metric inventory

OpenTelemetryPlan/presentation.md

@@ -0,0 +1,280 @@
+# OpenTelemetry Distributed Tracing for rippled
+
+---
+
+## Slide 1: Introduction
+
+### What is OpenTelemetry?
+
+OpenTelemetry is an open-source, CNCF-backed observability framework for distributed tracing, metrics, and logs.
+
+### Why OpenTelemetry for rippled?
+
+- **End-to-End Transaction Visibility**: Track transactions from submission → consensus → ledger inclusion
+- **Cross-Node Correlation**: Follow requests across multiple independent nodes using a unique `trace_id`
+- **Consensus Round Analysis**: Understand timing and behavior across validators
+- **Incident Debugging**: Correlate events across distributed nodes during issues
+
+```mermaid
+flowchart LR
+    A["Node A<br/>tx.receive<br/>trace_id: abc123"] --> B["Node B<br/>tx.relay<br/>trace_id: abc123"] --> C["Node C<br/>tx.validate<br/>trace_id: abc123"] --> D["Node D<br/>ledger.apply<br/>trace_id: abc123"]
+
+    style A fill:#1565c0,stroke:#0d47a1,color:#fff
+    style B fill:#2e7d32,stroke:#1b5e20,color:#fff
+    style C fill:#2e7d32,stroke:#1b5e20,color:#fff
+    style D fill:#e65100,stroke:#bf360c,color:#fff
+```
+
+> **Trace ID: abc123** — All nodes share the same trace, enabling cross-node correlation.
+
+---
+
+## Slide 2: OpenTelemetry vs Open Source Alternatives
+
+| Feature             | OpenTelemetry    | Jaeger           | Zipkin             | SkyWalking | Pinpoint   | Prometheus |
+| ------------------- | ---------------- | ---------------- | ------------------ | ---------- | ---------- | ---------- |
+| **Tracing**         | YES              | YES              | YES                | YES        | YES        | NO         |
+| **Metrics**         | YES              | NO               | NO                 | YES        | YES        | YES        |
+| **Logs**            | YES              | NO               | NO                 | YES        | NO         | NO         |
+| **C++ SDK**         | YES Official     | YES (Deprecated) | YES (Unmaintained) | NO         | NO         | YES        |
+| **Vendor Neutral**  | YES Primary goal | NO               | NO                 | NO         | NO         | NO         |
+| **Instrumentation** | Manual + Auto    | Manual           | Manual             | Auto-first | Auto-first | Manual     |
+| **Backend**         | Any (exporters)  | Self             | Self               | Self       | Self       | Self       |
+| **CNCF Status**     | Incubating       | Graduated        | NO                 | Incubating | NO         | Graduated  |
+
+> **Why OpenTelemetry?** It's the only actively maintained, full-featured C++ option with vendor neutrality — allowing export to Jaeger, Prometheus, Grafana, or any commercial backend without changing instrumentation.
+
+---
+
+## Slide 3: Comparison with rippled's Existing Solutions
+
+### Current Observability Stack
+
+| Aspect                | PerfLog (JSON)        | StatsD (Metrics)      | OpenTelemetry (NEW)         |
+| --------------------- | --------------------- | --------------------- | --------------------------- |
+| **Type**              | Logging               | Metrics               | Distributed Tracing         |
+| **Scope**             | Single node           | Single node           | **Cross-node**              |
+| **Data**              | JSON log entries      | Counters, gauges      | Spans with context          |
+| **Correlation**       | By timestamp          | By metric name        | By `trace_id`               |
+| **Overhead**          | Low (file I/O)        | Low (UDP)             | Low-Medium (configurable)   |
+| **Question Answered** | "What happened here?" | "How many? How fast?" | **"What was the journey?"** |
+
+### Use Case Matrix
+
+| Scenario                         | PerfLog | StatsD | OpenTelemetry |
+| -------------------------------- | ------- | ------ | ------------- |
+| "How many TXs per second?"       | ❌      | ✅     | ❌            |
+| "Why was this specific TX slow?" | ⚠️      | ❌     | ✅            |
+| "Which node delayed consensus?"  | ❌      | ❌     | ✅            |
+| "Show TX journey across 5 nodes" | ❌      | ❌     | ✅            |
+
+> **Key Insight**: OpenTelemetry **complements** (not replaces) existing systems.
+
+---
+
+## Slide 4: Architecture
+
+### High-Level Integration Architecture
+
+```mermaid
+flowchart TB
+    subgraph rippled["rippled Node"]
+        subgraph services["Core Services"]
+            direction LR
+            RPC["RPC Server<br/>(HTTP/WS)"] ~~~ Overlay["Overlay<br/>(P2P Network)"] ~~~ Consensus["Consensus<br/>(RCLConsensus)"]
+        end
+
+        Telemetry["Telemetry Module<br/>(OpenTelemetry SDK)"]
+
+        services --> Telemetry
+    end
+
+    Telemetry -->|OTLP/gRPC| Collector["OTel Collector"]
+
+    Collector --> Tempo["Grafana Tempo"]
+    Collector --> Jaeger["Jaeger"]
+    Collector --> Elastic["Elastic APM"]
+
+    style rippled fill:#424242,stroke:#212121,color:#fff
+    style services fill:#1565c0,stroke:#0d47a1,color:#fff
+    style Telemetry fill:#2e7d32,stroke:#1b5e20,color:#fff
+    style Collector fill:#e65100,stroke:#bf360c,color:#fff
+```
+
+### Context Propagation
+
+```mermaid
+sequenceDiagram
+    participant Client
+    participant NodeA as Node A
+    participant NodeB as Node B
+
+    Client->>NodeA: Submit TX (no context)
+    Note over NodeA: Creates trace_id: abc123<br/>span: tx.receive
+    NodeA->>NodeB: Relay TX<br/>(traceparent: abc123)
+    Note over NodeB: Links to trace_id: abc123<br/>span: tx.relay
+```
+
+- **HTTP/RPC**: W3C Trace Context headers (`traceparent`)
+- **P2P Messages**: Protocol Buffer extension fields
+
+---
+
+## Slide 5: Implementation Plan
+
+### 5-Phase Rollout (9 Weeks)
+
+```mermaid
+gantt
+    title Implementation Timeline
+    dateFormat  YYYY-MM-DD
+    axisFormat  Week %W
+
+    section Phase 1
+    Core Infrastructure    :p1, 2024-01-01, 2w
+
+    section Phase 2
+    RPC Tracing           :p2, after p1, 2w
+
+    section Phase 3
+    Transaction Tracing   :p3, after p2, 2w
+
+    section Phase 4
+    Consensus Tracing     :p4, after p3, 2w
+
+    section Phase 5
+    Documentation         :p5, after p4, 1w
+```
+
+### Phase Details
+
+| Phase | Focus               | Key Deliverables                             | Effort  |
+| ----- | ------------------- | -------------------------------------------- | ------- |
+| 1     | Core Infrastructure | SDK integration, Telemetry interface, Config | 10 days |
+| 2     | RPC Tracing         | HTTP context extraction, Handler spans       | 10 days |
+| 3     | Transaction Tracing | Protobuf context, P2P relay propagation      | 10 days |
+| 4     | Consensus Tracing   | Round spans, Proposal/validation tracing     | 10 days |
+| 5     | Documentation       | Runbook, Dashboards, Training                | 7 days  |
+
+**Total Effort**: ~47 developer-days (2 developers)
+
+---
+
+## Slide 6: Performance Overhead
+
+### Estimated System Impact
+
+| Metric            | Overhead   | Notes                               |
+| ----------------- | ---------- | ----------------------------------- |
+| **CPU**           | 1-3%       | Span creation and attribute setting |
+| **Memory**        | 2-5 MB     | Batch buffer for pending spans      |
+| **Network**       | 10-50 KB/s | Compressed OTLP export to collector |
+| **Latency (p99)** | <2%        | With proper sampling configuration  |
+
+### Per-Message Overhead (Context Propagation)
+
+Each P2P message carries trace context with the following overhead:
+
+| Field         | Size          | Description                               |
+| ------------- | ------------- | ----------------------------------------- |
+| `trace_id`    | 16 bytes      | Unique identifier for the entire trace    |
+| `span_id`     | 8 bytes       | Current span (becomes parent on receiver) |
+| `trace_flags` | 4 bytes       | Sampling decision flags                   |
+| `trace_state` | 0-4 bytes     | Optional vendor-specific data             |
+| **Total**     | **~32 bytes** | **Added per traced P2P message**          |
+
+```mermaid
+flowchart LR
+    subgraph msg["P2P Message with Trace Context"]
+        A["Original Message<br/>(variable size)"] --> B["+ TraceContext<br/>(~32 bytes)"]
+    end
+
+    subgraph breakdown["Context Breakdown"]
+        C["trace_id<br/>16 bytes"]
+        D["span_id<br/>8 bytes"]
+        E["flags<br/>4 bytes"]
+        F["state<br/>0-4 bytes"]
+    end
+
+    B --> breakdown
+
+    style A fill:#424242,stroke:#212121,color:#fff
+    style B fill:#2e7d32,stroke:#1b5e20,color:#fff
+    style C fill:#1565c0,stroke:#0d47a1,color:#fff
+    style D fill:#1565c0,stroke:#0d47a1,color:#fff
+    style E fill:#e65100,stroke:#bf360c,color:#fff
+    style F fill:#4a148c,stroke:#2e0d57,color:#fff
+```
+
+> **Note**: 32 bytes is negligible compared to typical transaction messages (hundreds to thousands of bytes)
+
+### Mitigation Strategies
+
+```mermaid
+flowchart LR
+    A["Head Sampling<br/>10% default"] --> B["Tail Sampling<br/>Keep errors/slow"] --> C["Batch Export<br/>Reduce I/O"] --> D["Conditional Compile<br/>XRPL_ENABLE_TELEMETRY"]
+
+    style A fill:#1565c0,stroke:#0d47a1,color:#fff
+    style B fill:#2e7d32,stroke:#1b5e20,color:#fff
+    style C fill:#e65100,stroke:#bf360c,color:#fff
+    style D fill:#4a148c,stroke:#2e0d57,color:#fff
+```
+
+### Kill Switches (Rollback Options)
+
+1. **Config Disable**: Set `enabled=0` in config → instant disable, no restart needed for sampling
+2. **Rebuild**: Compile with `XRPL_ENABLE_TELEMETRY=OFF` → zero overhead (no-op)
+3. **Full Revert**: Clean separation allows easy commit reversion
+
+---
+
+## Slide 7: Data Collection & Privacy
+
+### What Data is Collected
+
+| Category        | Attributes Collected                                                               | Purpose                     |
+| --------------- | ---------------------------------------------------------------------------------- | --------------------------- |
+| **Transaction** | `tx.hash`, `tx.type`, `tx.result`, `tx.fee`, `ledger_index`                        | Trace transaction lifecycle |
+| **Consensus**   | `round`, `phase`, `mode`, `proposers`(public key or public node id), `duration_ms` | Analyze consensus timing    |
+| **RPC**         | `command`, `version`, `status`, `duration_ms`                                      | Monitor RPC performance     |
+| **Peer**        | `peer.id`(public key), `latency_ms`, `message.type`, `message.size`                | Network topology analysis   |
+| **Ledger**      | `ledger.hash`, `ledger.index`, `close_time`, `tx_count`                            | Ledger progression tracking |
+| **Job**         | `job.type`, `queue_ms`, `worker`                                                   | JobQueue performance        |
+
+### What is NOT Collected (Privacy Guarantees)
+
+```mermaid
+flowchart LR
+    subgraph notCollected["❌ NOT Collected"]
+        direction LR
+        A["Private Keys"] ~~~ B["Account Balances"] ~~~ C["Transaction Amounts"]
+    end
+
+    subgraph alsoNot["❌ Also Excluded"]
+        direction LR
+        D["IP Addresses<br/>(configurable)"] ~~~ E["Personal Data"] ~~~ F["Raw TX Payloads"]
+    end
+
+    style A fill:#c62828,stroke:#8c2809,color:#fff
+    style B fill:#c62828,stroke:#8c2809,color:#fff
+    style C fill:#c62828,stroke:#8c2809,color:#fff
+    style D fill:#c62828,stroke:#8c2809,color:#fff
+    style E fill:#c62828,stroke:#8c2809,color:#fff
+    style F fill:#c62828,stroke:#8c2809,color:#fff
+```
+
+### Privacy Protection Mechanisms
+
+| Mechanism                  | Description                                                   |
+| -------------------------- | ------------------------------------------------------------- |
+| **Account Hashing**        | `xrpl.tx.account` is hashed at collector level before storage |
+| **Configurable Redaction** | Sensitive fields can be excluded via config                   |
+| **Sampling**               | Only 10% of traces recorded by default (reduces exposure)     |
+| **Local Control**          | Node operators control what gets exported                     |
+| **No Raw Payloads**        | Transaction content is never recorded, only metadata          |
+
+> **Key Principle**: Telemetry collects **operational metadata** (timing, counts, hashes) — never **sensitive content** (keys, balances, amounts).
+
+---
+
+_End of Presentation_

cfg/xrpld-example.cfg

@@ -940,23 +940,7 @@
 #
 #       path                Location to store the database
 #
-#   Optional keys
-#
-#       cache_size          Size of cache for database records. Default is 16384.
-#                           Setting this value to 0 will use the default value.
-#
-#       cache_age           Length of time in minutes to keep database records
-#                           cached. Default is 5 minutes. Setting this value to
-#                           0 will use the default value.
-#
-#                           Note: if neither cache_size nor cache_age is
-#                           specified, the cache for database records will not
-#                           be created. If only one of cache_size or cache_age
-#                           is specified, the cache will be created using the
-#                           default value for the unspecified parameter.
-#
-#                           Note: the cache will not be created if online_delete
-#                           is specified.
+#   Optional keys for NuDB and RocksDB:
 #
 #       fast_load           Boolean. If set, load the last persisted ledger
 #                           from disk upon process start before syncing to
@@ -964,8 +948,6 @@
 #                           if sufficient IOPS capacity is available.
 #                           Default 0.
 #
-#   Optional keys for NuDB or RocksDB:
-#
 #       earliest_seq        The default is 32570 to match the XRP ledger
 #                           network's earliest allowed sequence. Alternate
 #                           networks may set this value. Minimum value of 1.
@@ -1547,3 +1529,46 @@ validators.txt
 # set to ssl_verify to 0.
 [ssl_verify]
 1
+#-------------------------------------------------------------------------------
+#
+# 11. Telemetry (OpenTelemetry Tracing)
+#
+#-------------------------------------------------------------------------------
+#
+# Enables distributed tracing via OpenTelemetry. Requires building with
+# -DXRPL_ENABLE_TELEMETRY=ON (telemetry Conan option).
+#
+# [telemetry]
+#
+# enabled=0
+#
+#   Enable or disable telemetry at runtime. Default: 0 (disabled).
+#
+# endpoint=http://localhost:4318/v1/traces
+#
+#   The OpenTelemetry Collector endpoint (OTLP/HTTP). Default: http://localhost:4318/v1/traces.
+#
+# exporter=otlp_http
+#
+#   Exporter type: otlp_http. Default: otlp_http.
+#
+# sampling_ratio=1.0
+#
+#   Fraction of traces to sample (0.0 to 1.0). Default: 1.0 (all traces).
+#
+# trace_rpc=1
+#
+#   Enable RPC request tracing. Default: 1.
+#
+# trace_transactions=1
+#
+#   Enable transaction lifecycle tracing. Default: 1.
+#
+# trace_consensus=1
+#
+#   Enable consensus round tracing. Default: 1.
+#
+# trace_peer=0
+#
+#   Enable peer message tracing (high volume). Default: 0.
+#

cmake/CMakeFuncs.cmake

@@ -1,30 +1,32 @@
-macro (exclude_from_default target_)
-  set_target_properties (${target_} PROPERTIES EXCLUDE_FROM_ALL ON)
-  set_target_properties (${target_} PROPERTIES EXCLUDE_FROM_DEFAULT_BUILD ON)
-endmacro ()
+macro(exclude_from_default target_)
+    set_target_properties(${target_} PROPERTIES EXCLUDE_FROM_ALL ON)
+    set_target_properties(${target_} PROPERTIES EXCLUDE_FROM_DEFAULT_BUILD ON)
+endmacro()
 
-macro (exclude_if_included target_)
-  get_directory_property(has_parent PARENT_DIRECTORY)
-  if (has_parent)
-    exclude_from_default (${target_})
-  endif ()
-endmacro ()
+macro(exclude_if_included target_)
+    get_directory_property(has_parent PARENT_DIRECTORY)
+    if(has_parent)
+        exclude_from_default(${target_})
+    endif()
+endmacro()
 
 find_package(Git)
 
-function (git_branch branch_val)
-  if (NOT GIT_FOUND)
-    return ()
-  endif ()
-  set (_branch "")
-  execute_process (COMMAND ${GIT_EXECUTABLE} "rev-parse" "--abbrev-ref" "HEAD"
-                   WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-                   RESULT_VARIABLE _git_exit_code
-                   OUTPUT_VARIABLE _temp_branch
-                   OUTPUT_STRIP_TRAILING_WHITESPACE
-                   ERROR_QUIET)
-  if (_git_exit_code EQUAL 0)
-    set (_branch ${_temp_branch})
-  endif ()
-  set (${branch_val} "${_branch}" PARENT_SCOPE)
-endfunction ()
+function(git_branch branch_val)
+    if(NOT GIT_FOUND)
+        return()
+    endif()
+    set(_branch "")
+    execute_process(
+        COMMAND ${GIT_EXECUTABLE} "rev-parse" "--abbrev-ref" "HEAD"
+        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+        RESULT_VARIABLE _git_exit_code
+        OUTPUT_VARIABLE _temp_branch
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+        ERROR_QUIET
+    )
+    if(_git_exit_code EQUAL 0)
+        set(_branch ${_temp_branch})
+    endif()
+    set(${branch_val} "${_branch}" PARENT_SCOPE)
+endfunction()

cmake/Ccache.cmake

@@ -1,57 +1,62 @@
 find_program(CCACHE_PATH "ccache")
-if (NOT CCACHE_PATH)
+if(NOT CCACHE_PATH)
     return()
-endif ()
+endif()
 
 # For Linux and macOS we can use the ccache binary directly.
-if (NOT MSVC)
+if(NOT MSVC)
     set(CMAKE_C_COMPILER_LAUNCHER "${CCACHE_PATH}")
     set(CMAKE_CXX_COMPILER_LAUNCHER "${CCACHE_PATH}")
     message(STATUS "Found ccache: ${CCACHE_PATH}")
     return()
-endif ()
+endif()
 
 # For Windows more effort is required. The code below is a modified version of
 # https://github.com/ccache/ccache/wiki/MS-Visual-Studio#usage-with-cmake.
-if ("${CCACHE_PATH}" MATCHES "chocolatey")
+if("${CCACHE_PATH}" MATCHES "chocolatey")
     message(DEBUG "Ccache path: ${CCACHE_PATH}")
-    # Chocolatey uses a shim executable that we cannot use directly, in which
-    # case we have to find the executable it points to. If we cannot find the
-    # target executable then we cannot use ccache.
+    # Chocolatey uses a shim executable that we cannot use directly, in which case we have to find the executable it
+    # points to. If we cannot find the target executable then we cannot use ccache.
     find_program(BASH_PATH "bash")
-    if (NOT BASH_PATH)
+    if(NOT BASH_PATH)
         message(WARNING "Could not find bash.")
         return()
-    endif ()
+    endif()
 
     execute_process(
-            COMMAND bash -c "export LC_ALL='en_US.UTF-8'; ${CCACHE_PATH} --shimgen-noop | grep -oP 'path to executable: \\K.+' | head -c -1"
-            OUTPUT_VARIABLE CCACHE_PATH)
+        COMMAND
+            bash -c
+            "export LC_ALL='en_US.UTF-8'; ${CCACHE_PATH} --shimgen-noop | grep -oP 'path to executable: \\K.+' | head -c -1"
+        OUTPUT_VARIABLE CCACHE_PATH
+    )
 
-    if (NOT CCACHE_PATH)
+    if(NOT CCACHE_PATH)
         message(WARNING "Could not find ccache target.")
         return()
-    endif ()
+    endif()
     file(TO_CMAKE_PATH "${CCACHE_PATH}" CCACHE_PATH)
-endif ()
+endif()
 message(STATUS "Found ccache: ${CCACHE_PATH}")
 
 # Tell cmake to use ccache for compiling with Visual Studio.
-file(COPY_FILE
-        ${CCACHE_PATH} ${CMAKE_BINARY_DIR}/cl.exe
-        ONLY_IF_DIFFERENT)
+file(COPY_FILE ${CCACHE_PATH} ${CMAKE_BINARY_DIR}/cl.exe ONLY_IF_DIFFERENT)
 set(CMAKE_VS_GLOBALS
-        "CLToolExe=cl.exe"
-        "CLToolPath=${CMAKE_BINARY_DIR}"
-        "TrackFileAccess=false"
-        "UseMultiToolTask=true")
+    "CLToolExe=cl.exe"
+    "CLToolPath=${CMAKE_BINARY_DIR}"
+    "TrackFileAccess=false"
+    "UseMultiToolTask=true"
+)
 
-# By default Visual Studio generators will use /Zi to capture debug information,
-# which is not compatible with ccache, so tell it to use /Z7 instead.
-if (MSVC)
-    foreach (var_
-        CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
-        CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE)
-        string (REPLACE "/Zi" "/Z7" ${var_} "${${var_}}")
-    endforeach ()
-endif ()
+# By default Visual Studio generators will use /Zi to capture debug information, which is not compatible with ccache, so
+# tell it to use /Z7 instead.
+if(MSVC)
+    foreach(
+        var_
+        CMAKE_C_FLAGS_DEBUG
+        CMAKE_C_FLAGS_RELEASE
+        CMAKE_CXX_FLAGS_DEBUG
+        CMAKE_CXX_FLAGS_RELEASE
+    )
+        string(REPLACE "/Zi" "/Z7" ${var_} "${${var_}}")
+    endforeach()
+endif()

cmake/CodeCoverage.cmake

@@ -172,44 +172,49 @@ include(CMakeParseArguments)
 option(CODE_COVERAGE_VERBOSE "Verbose information" FALSE)
 
 # Check prereqs
-find_program( GCOVR_PATH gcovr PATHS ${CMAKE_SOURCE_DIR}/scripts/test)
+find_program(GCOVR_PATH gcovr PATHS ${CMAKE_SOURCE_DIR}/scripts/test)
 
 if(DEFINED CODE_COVERAGE_GCOV_TOOL)
-  set(GCOV_TOOL "${CODE_COVERAGE_GCOV_TOOL}")
+    set(GCOV_TOOL "${CODE_COVERAGE_GCOV_TOOL}")
 elseif(DEFINED ENV{CODE_COVERAGE_GCOV_TOOL})
-  set(GCOV_TOOL "$ENV{CODE_COVERAGE_GCOV_TOOL}")
+    set(GCOV_TOOL "$ENV{CODE_COVERAGE_GCOV_TOOL}")
 elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "(Apple)?[Cc]lang")
-  if(APPLE)
-    execute_process( COMMAND xcrun -f llvm-cov
-      OUTPUT_VARIABLE LLVMCOV_PATH
-      OUTPUT_STRIP_TRAILING_WHITESPACE
-    )
-  else()
-    find_program( LLVMCOV_PATH llvm-cov )
-  endif()
-  if(LLVMCOV_PATH)
-    set(GCOV_TOOL "${LLVMCOV_PATH} gcov")
-  endif()
+    if(APPLE)
+        execute_process(
+            COMMAND xcrun -f llvm-cov
+            OUTPUT_VARIABLE LLVMCOV_PATH
+            OUTPUT_STRIP_TRAILING_WHITESPACE
+        )
+    else()
+        find_program(LLVMCOV_PATH llvm-cov)
+    endif()
+    if(LLVMCOV_PATH)
+        set(GCOV_TOOL "${LLVMCOV_PATH} gcov")
+    endif()
 elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
-  find_program( GCOV_PATH gcov )
-  set(GCOV_TOOL "${GCOV_PATH}")
+    find_program(GCOV_PATH gcov)
+    set(GCOV_TOOL "${GCOV_PATH}")
 endif()
 
 # Check supported compiler (Clang, GNU and Flang)
 get_property(LANGUAGES GLOBAL PROPERTY ENABLED_LANGUAGES)
 foreach(LANG ${LANGUAGES})
-  if("${CMAKE_${LANG}_COMPILER_ID}" MATCHES "(Apple)?[Cc]lang")
-    if("${CMAKE_${LANG}_COMPILER_VERSION}" VERSION_LESS 3)
-      message(FATAL_ERROR "Clang version must be 3.0.0 or greater! Aborting...")
+    if("${CMAKE_${LANG}_COMPILER_ID}" MATCHES "(Apple)?[Cc]lang")
+        if("${CMAKE_${LANG}_COMPILER_VERSION}" VERSION_LESS 3)
+            message(
+                FATAL_ERROR
+                "Clang version must be 3.0.0 or greater! Aborting..."
+            )
+        endif()
+    elseif(
+        NOT "${CMAKE_${LANG}_COMPILER_ID}" MATCHES "GNU"
+        AND NOT "${CMAKE_${LANG}_COMPILER_ID}" MATCHES "(LLVM)?[Ff]lang"
+    )
+        message(FATAL_ERROR "Compiler is not GNU or Flang! Aborting...")
     endif()
-  elseif(NOT "${CMAKE_${LANG}_COMPILER_ID}" MATCHES "GNU"
-         AND NOT "${CMAKE_${LANG}_COMPILER_ID}" MATCHES "(LLVM)?[Ff]lang")
-    message(FATAL_ERROR "Compiler is not GNU or Flang! Aborting...")
-  endif()
 endforeach()
 
-set(COVERAGE_COMPILER_FLAGS "-g --coverage"
-    CACHE INTERNAL "")
+set(COVERAGE_COMPILER_FLAGS "-g --coverage" CACHE INTERNAL "")
 
 set(COVERAGE_CXX_COMPILER_FLAGS "")
 set(COVERAGE_C_COMPILER_FLAGS "")
@@ -228,49 +233,75 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "(GNU|Clang)")
 
     check_cxx_compiler_flag(-fprofile-abs-path HAVE_cxx_fprofile_abs_path)
     if(HAVE_cxx_fprofile_abs_path)
-        set(COVERAGE_CXX_COMPILER_FLAGS "${COVERAGE_CXX_COMPILER_FLAGS} -fprofile-abs-path")
+        set(COVERAGE_CXX_COMPILER_FLAGS
+            "${COVERAGE_CXX_COMPILER_FLAGS} -fprofile-abs-path"
+        )
     endif()
 
     check_c_compiler_flag(-fprofile-abs-path HAVE_c_fprofile_abs_path)
     if(HAVE_c_fprofile_abs_path)
-        set(COVERAGE_C_COMPILER_FLAGS "${COVERAGE_C_COMPILER_FLAGS} -fprofile-abs-path")
+        set(COVERAGE_C_COMPILER_FLAGS
+            "${COVERAGE_C_COMPILER_FLAGS} -fprofile-abs-path"
+        )
     endif()
 
     check_linker_flag(CXX -fprofile-abs-path HAVE_cxx_linker_fprofile_abs_path)
     if(HAVE_cxx_linker_fprofile_abs_path)
-        set(COVERAGE_CXX_LINKER_FLAGS "${COVERAGE_CXX_LINKER_FLAGS} -fprofile-abs-path")
+        set(COVERAGE_CXX_LINKER_FLAGS
+            "${COVERAGE_CXX_LINKER_FLAGS} -fprofile-abs-path"
+        )
     endif()
 
     check_linker_flag(C -fprofile-abs-path HAVE_c_linker_fprofile_abs_path)
     if(HAVE_c_linker_fprofile_abs_path)
-        set(COVERAGE_C_LINKER_FLAGS "${COVERAGE_C_LINKER_FLAGS} -fprofile-abs-path")
+        set(COVERAGE_C_LINKER_FLAGS
+            "${COVERAGE_C_LINKER_FLAGS} -fprofile-abs-path"
+        )
     endif()
 
     check_cxx_compiler_flag(-fprofile-update=atomic HAVE_cxx_fprofile_update)
     if(HAVE_cxx_fprofile_update)
-        set(COVERAGE_CXX_COMPILER_FLAGS "${COVERAGE_CXX_COMPILER_FLAGS}  -fprofile-update=atomic")
+        set(COVERAGE_CXX_COMPILER_FLAGS
+            "${COVERAGE_CXX_COMPILER_FLAGS}  -fprofile-update=atomic"
+        )
     endif()
 
     check_c_compiler_flag(-fprofile-update=atomic HAVE_c_fprofile_update)
     if(HAVE_c_fprofile_update)
-        set(COVERAGE_C_COMPILER_FLAGS "${COVERAGE_C_COMPILER_FLAGS} -fprofile-update=atomic")
+        set(COVERAGE_C_COMPILER_FLAGS
+            "${COVERAGE_C_COMPILER_FLAGS} -fprofile-update=atomic"
+        )
     endif()
 
-    check_linker_flag(CXX -fprofile-update=atomic HAVE_cxx_linker_fprofile_update)
+    check_linker_flag(
+        CXX
+        -fprofile-update=atomic
+        HAVE_cxx_linker_fprofile_update
+    )
     if(HAVE_cxx_linker_fprofile_update)
-        set(COVERAGE_CXX_LINKER_FLAGS "${COVERAGE_CXX_LINKER_FLAGS} -fprofile-update=atomic")
+        set(COVERAGE_CXX_LINKER_FLAGS
+            "${COVERAGE_CXX_LINKER_FLAGS} -fprofile-update=atomic"
+        )
     endif()
 
     check_linker_flag(C -fprofile-update=atomic HAVE_c_linker_fprofile_update)
     if(HAVE_c_linker_fprofile_update)
-        set(COVERAGE_C_LINKER_FLAGS "${COVERAGE_C_LINKER_FLAGS} -fprofile-update=atomic")
+        set(COVERAGE_C_LINKER_FLAGS
+            "${COVERAGE_C_LINKER_FLAGS} -fprofile-update=atomic"
+        )
     endif()
-
 endif()
 
-get_property(GENERATOR_IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+get_property(
+    GENERATOR_IS_MULTI_CONFIG
+    GLOBAL
+    PROPERTY GENERATOR_IS_MULTI_CONFIG
+)
 if(NOT (CMAKE_BUILD_TYPE STREQUAL "Debug" OR GENERATOR_IS_MULTI_CONFIG))
-    message(WARNING "Code coverage results with an optimised (non-Debug) build may be misleading")
+    message(
+        WARNING
+        "Code coverage results with an optimised (non-Debug) build may be misleading"
+    )
 endif() # NOT (CMAKE_BUILD_TYPE STREQUAL "Debug" OR GENERATOR_IS_MULTI_CONFIG)
 
 # Defines a target for running and collection code coverage information
@@ -299,7 +330,13 @@ function(setup_target_for_coverage_gcovr)
     set(options NONE)
     set(oneValueArgs BASE_DIRECTORY NAME FORMAT)
     set(multiValueArgs EXCLUDE EXECUTABLE EXECUTABLE_ARGS DEPENDENCIES)
-    cmake_parse_arguments(Coverage "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
+    cmake_parse_arguments(
+        Coverage
+        "${options}"
+        "${oneValueArgs}"
+        "${multiValueArgs}"
+        ${ARGN}
+    )
 
     if(NOT GCOV_TOOL)
         message(FATAL_ERROR "Could not find gcov or llvm-cov tool! Aborting...")
@@ -321,21 +358,33 @@ function(setup_target_for_coverage_gcovr)
     endif()
 
     if(NOT DEFINED Coverage_EXECUTABLE AND DEFINED Coverage_EXECUTABLE_ARGS)
-        message(FATAL_ERROR "EXECUTABLE_ARGS must not be set if EXECUTABLE is not set")
+        message(
+            FATAL_ERROR
+            "EXECUTABLE_ARGS must not be set if EXECUTABLE is not set"
+        )
     endif()
 
     if("--output" IN_LIST GCOVR_ADDITIONAL_ARGS)
-        message(FATAL_ERROR "Unsupported --output option detected in GCOVR_ADDITIONAL_ARGS! Aborting...")
+        message(
+            FATAL_ERROR
+            "Unsupported --output option detected in GCOVR_ADDITIONAL_ARGS! Aborting..."
+        )
     else()
-        if((Coverage_FORMAT STREQUAL "html-details")
-            OR (Coverage_FORMAT STREQUAL "html-nested"))
-            set(GCOVR_OUTPUT_FILE ${PROJECT_BINARY_DIR}/${Coverage_NAME}/index.html)
+        if(
+            (Coverage_FORMAT STREQUAL "html-details")
+            OR (Coverage_FORMAT STREQUAL "html-nested")
+        )
+            set(GCOVR_OUTPUT_FILE
+                ${PROJECT_BINARY_DIR}/${Coverage_NAME}/index.html
+            )
             set(GCOVR_CREATE_FOLDER ${PROJECT_BINARY_DIR}/${Coverage_NAME})
         elseif(Coverage_FORMAT STREQUAL "html-single")
             set(GCOVR_OUTPUT_FILE ${Coverage_NAME}.html)
-        elseif((Coverage_FORMAT STREQUAL "json-summary")
+        elseif(
+            (Coverage_FORMAT STREQUAL "json-summary")
             OR (Coverage_FORMAT STREQUAL "json-details")
-            OR (Coverage_FORMAT STREQUAL "coveralls"))
+            OR (Coverage_FORMAT STREQUAL "coveralls")
+        )
             set(GCOVR_OUTPUT_FILE ${Coverage_NAME}.json)
         elseif(Coverage_FORMAT STREQUAL "txt")
             set(GCOVR_OUTPUT_FILE ${Coverage_NAME}.txt)
@@ -348,50 +397,65 @@ function(setup_target_for_coverage_gcovr)
         endif()
     endif()
 
-    if((Coverage_FORMAT STREQUAL "cobertura")
-        OR (Coverage_FORMAT STREQUAL "xml"))
-        list(APPEND GCOVR_ADDITIONAL_ARGS --cobertura "${GCOVR_OUTPUT_FILE}" )
-        list(APPEND GCOVR_ADDITIONAL_ARGS --cobertura-pretty )
+    if(
+        (Coverage_FORMAT STREQUAL "cobertura")
+        OR (Coverage_FORMAT STREQUAL "xml")
+    )
+        list(APPEND GCOVR_ADDITIONAL_ARGS --cobertura "${GCOVR_OUTPUT_FILE}")
+        list(APPEND GCOVR_ADDITIONAL_ARGS --cobertura-pretty)
         set(Coverage_FORMAT cobertura) # overwrite xml
     elseif(Coverage_FORMAT STREQUAL "sonarqube")
-        list(APPEND GCOVR_ADDITIONAL_ARGS --sonarqube "${GCOVR_OUTPUT_FILE}" )
+        list(APPEND GCOVR_ADDITIONAL_ARGS --sonarqube "${GCOVR_OUTPUT_FILE}")
     elseif(Coverage_FORMAT STREQUAL "jacoco")
-        list(APPEND GCOVR_ADDITIONAL_ARGS --jacoco "${GCOVR_OUTPUT_FILE}" )
-        list(APPEND GCOVR_ADDITIONAL_ARGS --jacoco-pretty )
+        list(APPEND GCOVR_ADDITIONAL_ARGS --jacoco "${GCOVR_OUTPUT_FILE}")
+        list(APPEND GCOVR_ADDITIONAL_ARGS --jacoco-pretty)
     elseif(Coverage_FORMAT STREQUAL "clover")
-        list(APPEND GCOVR_ADDITIONAL_ARGS --clover "${GCOVR_OUTPUT_FILE}" )
-        list(APPEND GCOVR_ADDITIONAL_ARGS --clover-pretty )
+        list(APPEND GCOVR_ADDITIONAL_ARGS --clover "${GCOVR_OUTPUT_FILE}")
+        list(APPEND GCOVR_ADDITIONAL_ARGS --clover-pretty)
     elseif(Coverage_FORMAT STREQUAL "lcov")
-        list(APPEND GCOVR_ADDITIONAL_ARGS --lcov "${GCOVR_OUTPUT_FILE}" )
+        list(APPEND GCOVR_ADDITIONAL_ARGS --lcov "${GCOVR_OUTPUT_FILE}")
     elseif(Coverage_FORMAT STREQUAL "json-summary")
-        list(APPEND GCOVR_ADDITIONAL_ARGS --json-summary "${GCOVR_OUTPUT_FILE}" )
+        list(APPEND GCOVR_ADDITIONAL_ARGS --json-summary "${GCOVR_OUTPUT_FILE}")
         list(APPEND GCOVR_ADDITIONAL_ARGS --json-summary-pretty)
     elseif(Coverage_FORMAT STREQUAL "json-details")
-        list(APPEND GCOVR_ADDITIONAL_ARGS --json "${GCOVR_OUTPUT_FILE}" )
+        list(APPEND GCOVR_ADDITIONAL_ARGS --json "${GCOVR_OUTPUT_FILE}")
         list(APPEND GCOVR_ADDITIONAL_ARGS --json-pretty)
     elseif(Coverage_FORMAT STREQUAL "coveralls")
-        list(APPEND GCOVR_ADDITIONAL_ARGS --coveralls "${GCOVR_OUTPUT_FILE}" )
+        list(APPEND GCOVR_ADDITIONAL_ARGS --coveralls "${GCOVR_OUTPUT_FILE}")
         list(APPEND GCOVR_ADDITIONAL_ARGS --coveralls-pretty)
     elseif(Coverage_FORMAT STREQUAL "csv")
-        list(APPEND GCOVR_ADDITIONAL_ARGS --csv "${GCOVR_OUTPUT_FILE}" )
+        list(APPEND GCOVR_ADDITIONAL_ARGS --csv "${GCOVR_OUTPUT_FILE}")
     elseif(Coverage_FORMAT STREQUAL "txt")
-        list(APPEND GCOVR_ADDITIONAL_ARGS --txt "${GCOVR_OUTPUT_FILE}" )
+        list(APPEND GCOVR_ADDITIONAL_ARGS --txt "${GCOVR_OUTPUT_FILE}")
     elseif(Coverage_FORMAT STREQUAL "html-single")
-        list(APPEND GCOVR_ADDITIONAL_ARGS --html "${GCOVR_OUTPUT_FILE}" )
+        list(APPEND GCOVR_ADDITIONAL_ARGS --html "${GCOVR_OUTPUT_FILE}")
         list(APPEND GCOVR_ADDITIONAL_ARGS --html-self-contained)
     elseif(Coverage_FORMAT STREQUAL "html-nested")
-        list(APPEND GCOVR_ADDITIONAL_ARGS --html-nested "${GCOVR_OUTPUT_FILE}" )
+        list(APPEND GCOVR_ADDITIONAL_ARGS --html-nested "${GCOVR_OUTPUT_FILE}")
     elseif(Coverage_FORMAT STREQUAL "html-details")
-        list(APPEND GCOVR_ADDITIONAL_ARGS --html-details "${GCOVR_OUTPUT_FILE}" )
+        list(APPEND GCOVR_ADDITIONAL_ARGS --html-details "${GCOVR_OUTPUT_FILE}")
     else()
-        message(FATAL_ERROR "Unsupported output style ${Coverage_FORMAT}! Aborting...")
+        message(
+            FATAL_ERROR
+            "Unsupported output style ${Coverage_FORMAT}! Aborting..."
+        )
     endif()
 
     # Collect excludes (CMake 3.4+: Also compute absolute paths)
     set(GCOVR_EXCLUDES "")
-    foreach(EXCLUDE ${Coverage_EXCLUDE} ${COVERAGE_EXCLUDES} ${COVERAGE_GCOVR_EXCLUDES})
+    foreach(
+        EXCLUDE
+        ${Coverage_EXCLUDE}
+        ${COVERAGE_EXCLUDES}
+        ${COVERAGE_GCOVR_EXCLUDES}
+    )
         if(CMAKE_VERSION VERSION_GREATER 3.4)
-            get_filename_component(EXCLUDE ${EXCLUDE} ABSOLUTE BASE_DIR ${BASEDIR})
+            get_filename_component(
+                EXCLUDE
+                ${EXCLUDE}
+                ABSOLUTE
+                BASE_DIR ${BASEDIR}
+            )
         endif()
         list(APPEND GCOVR_EXCLUDES "${EXCLUDE}")
     endforeach()
@@ -409,22 +473,29 @@ function(setup_target_for_coverage_gcovr)
     # before running the coverage target NAME
     if(DEFINED Coverage_EXECUTABLE)
         set(GCOVR_EXEC_TESTS_CMD
-            ${Coverage_EXECUTABLE} ${Coverage_EXECUTABLE_ARGS}
+            ${Coverage_EXECUTABLE}
+            ${Coverage_EXECUTABLE_ARGS}
         )
     endif()
 
     # Create folder
     if(DEFINED GCOVR_CREATE_FOLDER)
         set(GCOVR_FOLDER_CMD
-            ${CMAKE_COMMAND} -E make_directory ${GCOVR_CREATE_FOLDER})
+            ${CMAKE_COMMAND}
+            -E
+            make_directory
+            ${GCOVR_CREATE_FOLDER}
+        )
     endif()
 
     # Running gcovr
     set(GCOVR_CMD
         ${GCOVR_PATH}
-        --gcov-executable ${GCOV_TOOL}
+        --gcov-executable
+        ${GCOV_TOOL}
         --gcov-ignore-parse-errors=negative_hits.warn_once_per_file
-        -r ${BASEDIR}
+        -r
+        ${BASEDIR}
         ${GCOVR_ADDITIONAL_ARGS}
         ${GCOVR_EXCLUDE_ARGS}
         --object-directory=${PROJECT_BINARY_DIR}
@@ -435,13 +506,23 @@ function(setup_target_for_coverage_gcovr)
 
         if(NOT "${GCOVR_EXEC_TESTS_CMD}" STREQUAL "")
             message(STATUS "Command to run tests: ")
-            string(REPLACE ";" " " GCOVR_EXEC_TESTS_CMD_SPACED "${GCOVR_EXEC_TESTS_CMD}")
+            string(
+                REPLACE ";"
+                " "
+                GCOVR_EXEC_TESTS_CMD_SPACED
+                "${GCOVR_EXEC_TESTS_CMD}"
+            )
             message(STATUS "${GCOVR_EXEC_TESTS_CMD_SPACED}")
         endif()
 
         if(NOT "${GCOVR_FOLDER_CMD}" STREQUAL "")
             message(STATUS "Command to create a folder: ")
-            string(REPLACE ";" " " GCOVR_FOLDER_CMD_SPACED "${GCOVR_FOLDER_CMD}")
+            string(
+                REPLACE ";"
+                " "
+                GCOVR_FOLDER_CMD_SPACED
+                "${GCOVR_FOLDER_CMD}"
+            )
             message(STATUS "${GCOVR_FOLDER_CMD_SPACED}")
         endif()
 
@@ -450,11 +531,11 @@ function(setup_target_for_coverage_gcovr)
         message(STATUS "${GCOVR_CMD_SPACED}")
     endif()
 
-    add_custom_target(${Coverage_NAME}
+    add_custom_target(
+        ${Coverage_NAME}
         COMMAND ${GCOVR_EXEC_TESTS_CMD}
         COMMAND ${GCOVR_FOLDER_CMD}
         COMMAND ${GCOVR_CMD}
-
         BYPRODUCTS ${GCOVR_OUTPUT_FILE}
         WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
         DEPENDS ${Coverage_DEPENDENCIES}
@@ -463,25 +544,49 @@ function(setup_target_for_coverage_gcovr)
     )
 
     # Show info where to find the report
-    add_custom_command(TARGET ${Coverage_NAME} POST_BUILD
+    add_custom_command(
+        TARGET ${Coverage_NAME}
+        POST_BUILD
         COMMAND echo
-        COMMENT "Code coverage report saved in ${GCOVR_OUTPUT_FILE} formatted as ${Coverage_FORMAT}"
+        COMMENT
+            "Code coverage report saved in ${GCOVR_OUTPUT_FILE} formatted as ${Coverage_FORMAT}"
     )
 endfunction() # setup_target_for_coverage_gcovr
 
 function(add_code_coverage_to_target name scope)
-    separate_arguments(COVERAGE_CXX_COMPILER_FLAGS NATIVE_COMMAND "${COVERAGE_CXX_COMPILER_FLAGS}")
-    separate_arguments(COVERAGE_C_COMPILER_FLAGS NATIVE_COMMAND "${COVERAGE_C_COMPILER_FLAGS}")
-    separate_arguments(COVERAGE_CXX_LINKER_FLAGS NATIVE_COMMAND "${COVERAGE_CXX_LINKER_FLAGS}")
-    separate_arguments(COVERAGE_C_LINKER_FLAGS NATIVE_COMMAND "${COVERAGE_C_LINKER_FLAGS}")
+    separate_arguments(
+        COVERAGE_CXX_COMPILER_FLAGS
+        NATIVE_COMMAND
+        "${COVERAGE_CXX_COMPILER_FLAGS}"
+    )
+    separate_arguments(
+        COVERAGE_C_COMPILER_FLAGS
+        NATIVE_COMMAND
+        "${COVERAGE_C_COMPILER_FLAGS}"
+    )
+    separate_arguments(
+        COVERAGE_CXX_LINKER_FLAGS
+        NATIVE_COMMAND
+        "${COVERAGE_CXX_LINKER_FLAGS}"
+    )
+    separate_arguments(
+        COVERAGE_C_LINKER_FLAGS
+        NATIVE_COMMAND
+        "${COVERAGE_C_LINKER_FLAGS}"
+    )
 
     # Add compiler options to the target
-    target_compile_options(${name} ${scope}
-            $<$<COMPILE_LANGUAGE:CXX>:${COVERAGE_CXX_COMPILER_FLAGS}>
-            $<$<COMPILE_LANGUAGE:C>:${COVERAGE_C_COMPILER_FLAGS}>)
+    target_compile_options(
+        ${name}
+        ${scope}
+        $<$<COMPILE_LANGUAGE:CXX>:${COVERAGE_CXX_COMPILER_FLAGS}>
+        $<$<COMPILE_LANGUAGE:C>:${COVERAGE_C_COMPILER_FLAGS}>
+    )
 
-    target_link_libraries (${name} ${scope}
-            $<$<LINK_LANGUAGE:CXX>:${COVERAGE_CXX_LINKER_FLAGS} gcov>
-            $<$<LINK_LANGUAGE:C>:${COVERAGE_C_LINKER_FLAGS} gcov>
+    target_link_libraries(
+        ${name}
+        ${scope}
+        $<$<LINK_LANGUAGE:CXX>:${COVERAGE_CXX_LINKER_FLAGS}>
+        $<$<LINK_LANGUAGE:C>:${COVERAGE_C_LINKER_FLAGS}>
     )
 endfunction() # add_code_coverage_to_target

cmake/CompilationEnv.cmake

@@ -1,8 +1,7 @@
- # Shared detection of compiler, operating system, and architecture.
- #
- # This module centralizes environment detection so that other
- # CMake modules can use the same variables instead of repeating
- # checks on CMAKE_* and built-in platform variables.
+# Shared detection of compiler, operating system, and architecture.
+#
+# This module centralizes environment detection so that other CMake modules can use the same variables instead of
+# repeating checks on CMAKE_* and built-in platform variables.
 
 # Only run once per configure step.
 include_guard(GLOBAL)
@@ -13,17 +12,22 @@ include_guard(GLOBAL)
 set(is_clang FALSE)
 set(is_gcc FALSE)
 set(is_msvc FALSE)
+set(is_xcode FALSE)
 
 if(CMAKE_CXX_COMPILER_ID MATCHES ".*Clang") # Clang or AppleClang
-  set(is_clang TRUE)
+    set(is_clang TRUE)
 elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
-  set(is_gcc TRUE)
+    set(is_gcc TRUE)
 elseif(MSVC)
-  set(is_msvc TRUE)
+    set(is_msvc TRUE)
 else()
-  message(FATAL_ERROR "Unsupported C++ compiler: ${CMAKE_CXX_COMPILER_ID}")
+    message(FATAL_ERROR "Unsupported C++ compiler: ${CMAKE_CXX_COMPILER_ID}")
 endif()
 
+# Xcode generator detection
+if(CMAKE_GENERATOR STREQUAL "Xcode")
+    set(is_xcode TRUE)
+endif()
 
 # --------------------------------------------------------------------
 # Operating system detection
@@ -33,11 +37,11 @@ set(is_windows FALSE)
 set(is_macos FALSE)
 
 if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
-  set(is_linux TRUE)
+    set(is_linux TRUE)
 elseif(CMAKE_SYSTEM_NAME STREQUAL "Windows")
-  set(is_windows TRUE)
+    set(is_windows TRUE)
 elseif(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
-  set(is_macos TRUE)
+    set(is_macos TRUE)
 endif()
 
 # --------------------------------------------------------------------
@@ -46,9 +50,9 @@ endif()
 set(is_amd64 FALSE)
 set(is_arm64 FALSE)
 if(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|AMD64")
-  set(is_amd64 TRUE)
-elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|arm64")
-  set(is_arm64 TRUE)
+    set(is_amd64 TRUE)
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|arm64|ARM64")
+    set(is_arm64 TRUE)
 else()
-  message(FATAL_ERROR "Unknown architecture: ${CMAKE_SYSTEM_PROCESSOR}")
+    message(FATAL_ERROR "Unknown architecture: ${CMAKE_SYSTEM_PROCESSOR}")
 endif()

cmake/GitInfo.cmake

@@ -0,0 +1,28 @@
+include_guard()
+
+set(GIT_BUILD_BRANCH "")
+set(GIT_COMMIT_HASH "")
+
+find_package(Git)
+if(NOT Git_FOUND)
+    message(WARNING "Git not found. Git branch and commit hash will be empty.")
+    return()
+endif()
+
+set(GIT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/.git)
+
+execute_process(
+    COMMAND
+        ${GIT_EXECUTABLE} --git-dir=${GIT_DIRECTORY} rev-parse --abbrev-ref HEAD
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+    OUTPUT_VARIABLE GIT_BUILD_BRANCH
+)
+
+execute_process(
+    COMMAND ${GIT_EXECUTABLE} --git-dir=${GIT_DIRECTORY} rev-parse HEAD
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+    OUTPUT_VARIABLE GIT_COMMIT_HASH
+)
+
+message(STATUS "Git branch: ${GIT_BUILD_BRANCH}")
+message(STATUS "Git commit hash: ${GIT_COMMIT_HASH}")

cmake/XrplAddTest.cmake

@@ -1,25 +1,22 @@
 include(isolate_headers)
 
 function(xrpl_add_test name)
-  set(target ${PROJECT_NAME}.test.${name})
+    set(target ${PROJECT_NAME}.test.${name})
 
-  file(GLOB_RECURSE sources CONFIGURE_DEPENDS
-  "${CMAKE_CURRENT_SOURCE_DIR}/${name}/*.cpp"
-  "${CMAKE_CURRENT_SOURCE_DIR}/${name}.cpp"
-  )
-  add_executable(${target} ${ARGN} ${sources})
+    file(
+        GLOB_RECURSE sources
+        CONFIGURE_DEPENDS
+        "${CMAKE_CURRENT_SOURCE_DIR}/${name}/*.cpp"
+        "${CMAKE_CURRENT_SOURCE_DIR}/${name}.cpp"
+    )
+    add_executable(${target} ${ARGN} ${sources})
 
-  isolate_headers(
-    ${target}
-    "${CMAKE_SOURCE_DIR}"
-    "${CMAKE_SOURCE_DIR}/tests/${name}"
-    PRIVATE
-  )
+    isolate_headers(
+        ${target}
+        "${CMAKE_SOURCE_DIR}"
+        "${CMAKE_SOURCE_DIR}/tests/${name}"
+        PRIVATE
+    )
 
-  # Make sure the test isn't optimized away in unity builds
-  set_target_properties(${target} PROPERTIES
-    UNITY_BUILD_MODE GROUP
-    UNITY_BUILD_BATCH_SIZE 0)  # Adjust as needed
-
-  add_test(NAME ${target} COMMAND ${target})
+    add_test(NAME ${target} COMMAND ${target})
 endfunction()

cmake/XrplCompiler.cmake

@@ -8,153 +8,192 @@ include(CompilationEnv)
    TODO some/most of these common settings belong in a
    toolchain file, especially the ABI-impacting ones
 #]=========================================================]
-add_library (common INTERFACE)
-add_library (Xrpl::common ALIAS common)
+add_library(common INTERFACE)
+add_library(Xrpl::common ALIAS common)
 include(XrplSanitizers)
 # add a single global dependency on this interface lib
-link_libraries (Xrpl::common)
+link_libraries(Xrpl::common)
 # Respect CMAKE_POSITION_INDEPENDENT_CODE setting (may be set by Conan toolchain)
 if(NOT DEFINED CMAKE_POSITION_INDEPENDENT_CODE)
-  set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+    set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 endif()
-set_target_properties (common
-  PROPERTIES INTERFACE_POSITION_INDEPENDENT_CODE ${CMAKE_POSITION_INDEPENDENT_CODE})
+set_target_properties(
+    common
+    PROPERTIES
+        INTERFACE_POSITION_INDEPENDENT_CODE ${CMAKE_POSITION_INDEPENDENT_CODE}
+)
 set(CMAKE_CXX_EXTENSIONS OFF)
-target_compile_definitions (common
-  INTERFACE
-    $<$<CONFIG:Debug>:DEBUG _DEBUG>
-    #[===[
+target_compile_definitions(
+    common
+    INTERFACE
+        $<$<CONFIG:Debug>:DEBUG
+        _DEBUG>
+        #[===[
     NOTE: CMAKE release builds already have NDEBUG defined, so no need to add it
     explicitly except for the special case of (profile ON) and (assert OFF).
     Presumably this is because we don't want profile builds asserting unless
     asserts were specifically requested.
     ]===]
-    $<$<AND:$<BOOL:${profile}>,$<NOT:$<BOOL:${assert}>>>:NDEBUG>
-    # TODO: Remove once we have migrated functions from OpenSSL 1.x to 3.x.
-    OPENSSL_SUPPRESS_DEPRECATED
+        $<$<AND:$<BOOL:${profile}>,$<NOT:$<BOOL:${assert}>>>:NDEBUG>
+        # TODO: Remove once we have migrated functions from OpenSSL 1.x to 3.x.
+        OPENSSL_SUPPRESS_DEPRECATED
 )
 
-if (MSVC)
-  # remove existing exception flag since we set it to -EHa
-  string (REGEX REPLACE "[-/]EH[a-z]+" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+if(MSVC)
+    # remove existing exception flag since we set it to -EHa
+    string(REGEX REPLACE "[-/]EH[a-z]+" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
 
-  foreach (var_
-      CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
-      CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE)
+    foreach(
+        var_
+        CMAKE_C_FLAGS_DEBUG
+        CMAKE_C_FLAGS_RELEASE
+        CMAKE_CXX_FLAGS_DEBUG
+        CMAKE_CXX_FLAGS_RELEASE
+    )
+        # also remove dynamic runtime
+        string(REGEX REPLACE "[-/]MD[d]*" " " ${var_} "${${var_}}")
 
-    # also remove dynamic runtime
-    string (REGEX REPLACE "[-/]MD[d]*" " " ${var_} "${${var_}}")
+        # /ZI (Edit & Continue debugging information) is incompatible with Gy-
+        string(REPLACE "/ZI" "/Zi" ${var_} "${${var_}}")
 
-    # /ZI (Edit & Continue debugging information) is incompatible with Gy-
-    string (REPLACE "/ZI" "/Zi" ${var_} "${${var_}}")
+        # omit debug info completely under CI (not needed)
+        if(is_ci)
+            string(REPLACE "/Zi" " " ${var_} "${${var_}}")
+            string(REPLACE "/Z7" " " ${var_} "${${var_}}")
+        endif()
+    endforeach()
 
-    # omit debug info completely under CI (not needed)
-    if (is_ci)
-      string (REPLACE "/Zi" " " ${var_} "${${var_}}")
-      string (REPLACE "/Z7" " " ${var_} "${${var_}}")
-    endif ()
-  endforeach ()
-
-  target_compile_options (common
-    INTERFACE
-      -bigobj            # Increase object file max size
-      -fp:precise        # Floating point behavior
-      -Gd                # __cdecl calling convention
-      -Gm-               # Minimal rebuild: disabled
-      -Gy-               # Function level linking: disabled
-      -MP                # Multiprocessor compilation
-      -openmp-           # pragma omp: disabled
-      -errorReport:none  # No error reporting to Internet
-      -nologo            # Suppress login banner
-      -wd4018            # Disable signed/unsigned comparison warnings
-      -wd4244            # Disable float to int possible loss of data warnings
-      -wd4267            # Disable size_t to T possible loss of data warnings
-      -wd4800            # Disable C4800(int to bool performance)
-      -wd4503            # Decorated name length exceeded, name was truncated
-      $<$<COMPILE_LANGUAGE:CXX>:
-        -EHa
-        -GR
-      >
-      $<$<CONFIG:Release>:-Ox>
-      $<$<AND:$<COMPILE_LANGUAGE:CXX>,$<CONFIG:Debug>>:
-        -GS
-        -Zc:forScope
-      >
-      # static runtime
-      $<$<CONFIG:Debug>:-MTd>
-      $<$<NOT:$<CONFIG:Debug>>:-MT>
-      $<$<BOOL:${werr}>:-WX>
-      )
-  target_compile_definitions (common
-    INTERFACE
-      _WIN32_WINNT=0x6000
-      _SCL_SECURE_NO_WARNINGS
-      _CRT_SECURE_NO_WARNINGS
-      WIN32_CONSOLE
-      WIN32_LEAN_AND_MEAN
-      NOMINMAX
-      # TODO: Resolve these warnings, don't just silence them
-      _SILENCE_ALL_CXX17_DEPRECATION_WARNINGS
-      $<$<AND:$<COMPILE_LANGUAGE:CXX>,$<CONFIG:Debug>>:_CRTDBG_MAP_ALLOC>)
-  target_link_libraries (common
-    INTERFACE
-      -errorreport:none
-      -machine:X64)
-else ()
-  target_compile_options (common
-    INTERFACE
-      -Wall
-      -Wdeprecated
-      $<$<BOOL:${is_clang}>:-Wno-deprecated-declarations>
-      $<$<BOOL:${wextra}>:-Wextra -Wno-unused-parameter>
-      $<$<BOOL:${werr}>:-Werror>
-      -fstack-protector
-      -Wno-sign-compare
-      -Wno-unused-but-set-variable
-      $<$<NOT:$<CONFIG:Debug>>:-fno-strict-aliasing>
-      # tweak gcc optimization for debug
-      $<$<AND:$<BOOL:${is_gcc}>,$<CONFIG:Debug>>:-O0>
-      # Add debug symbols to release config
-      $<$<CONFIG:Release>:-g>)
-  target_link_libraries (common
-    INTERFACE
-      -rdynamic
-      $<$<BOOL:${is_linux}>:-Wl,-z,relro,-z,now,--build-id>
-      # link to static libc/c++ iff:
-      #   * static option set and
-      #   * NOT APPLE (AppleClang does not support static libc/c++) and
-      #   * NOT SANITIZERS (sanitizers typically don't work with static libc/c++)
-      $<$<AND:$<BOOL:${static}>,$<NOT:$<BOOL:${APPLE}>>,$<NOT:$<BOOL:${SANITIZERS_ENABLED}>>>:
-      -static-libstdc++
-      -static-libgcc
-      >)
-endif ()
+    target_compile_options(
+        common
+        INTERFACE # Increase object file max size
+            -bigobj
+            # Floating point behavior
+            -fp:precise
+            # __cdecl calling convention
+            -Gd
+            # Minimal rebuild: disabled
+            -Gm-
+            # Function level linking: disabled
+            -Gy-
+            # Multiprocessor compilation
+            -MP
+            # pragma omp: disabled
+            -openmp-
+            # No error reporting to Internet
+            -errorReport:none
+            # Suppress login banner
+            -nologo
+            # Disable signed/unsigned comparison warnings
+            -wd4018
+            # Disable float to int possible loss of data warnings
+            -wd4244
+            # Disable size_t to T possible loss of data warnings
+            -wd4267
+            # Disable C4800(int to bool performance)
+            -wd4800
+            # Decorated name length exceeded, name was truncated
+            -wd4503
+            $<$<COMPILE_LANGUAGE:CXX>:
+            -EHa
+            -GR
+            >
+            $<$<CONFIG:Release>:-Ox>
+            $<$<AND:$<COMPILE_LANGUAGE:CXX>,$<CONFIG:Debug>>:
+            -GS
+            -Zc:forScope
+            >
+            # static runtime
+            $<$<CONFIG:Debug>:-MTd>
+            $<$<NOT:$<CONFIG:Debug>>:-MT>
+            $<$<BOOL:${werr}>:-WX>
+    )
+    target_compile_definitions(
+        common
+        INTERFACE
+            _WIN32_WINNT=0x6000
+            _SCL_SECURE_NO_WARNINGS
+            _CRT_SECURE_NO_WARNINGS
+            WIN32_CONSOLE
+            WIN32_LEAN_AND_MEAN
+            NOMINMAX
+            # TODO: Resolve these warnings, don't just silence them
+            _SILENCE_ALL_CXX17_DEPRECATION_WARNINGS
+            $<$<AND:$<COMPILE_LANGUAGE:CXX>,$<CONFIG:Debug>>:_CRTDBG_MAP_ALLOC>
+    )
+    target_link_libraries(common INTERFACE -errorreport:none -machine:X64)
+else()
+    target_compile_options(
+        common
+        INTERFACE
+            -Wall
+            -Wdeprecated
+            $<$<BOOL:${is_clang}>:-Wno-deprecated-declarations>
+            $<$<BOOL:${wextra}>:-Wextra
+            -Wno-unused-parameter>
+            $<$<BOOL:${werr}>:-Werror>
+            -fstack-protector
+            -Wno-sign-compare
+            -Wno-unused-but-set-variable
+            $<$<NOT:$<CONFIG:Debug>>:-fno-strict-aliasing>
+            # tweak gcc optimization for debug
+            $<$<AND:$<BOOL:${is_gcc}>,$<CONFIG:Debug>>:-O0>
+            # Add debug symbols to release config
+            $<$<CONFIG:Release>:-g>
+    )
+    target_link_libraries(
+        common
+        INTERFACE
+            -rdynamic
+            $<$<BOOL:${is_linux}>:-Wl,-z,relro,-z,now,--build-id>
+            # link to static libc/c++ iff: * static option set and * NOT APPLE (AppleClang does not support static
+            # libc/c++) and * NOT SANITIZERS (sanitizers typically don't work with static libc/c++)
+            $<$<AND:$<BOOL:${static}>,$<NOT:$<BOOL:${APPLE}>>,$<NOT:$<BOOL:${SANITIZERS_ENABLED}>>>:
+            -static-libstdc++
+            -static-libgcc
+            >
+    )
+endif()
 
 # Antithesis instrumentation will only be built and deployed using machines running Linux.
-if (voidstar)
-  if (NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
-    message(FATAL_ERROR "Antithesis instrumentation requires Debug build type, aborting...")
-  elseif (NOT is_linux)
-    message(FATAL_ERROR "Antithesis instrumentation requires Linux, aborting...")
-  elseif (NOT (is_clang AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 16.0))
-    message(FATAL_ERROR "Antithesis instrumentation requires Clang version 16 or later, aborting...")
-  endif ()
-endif ()
+if(voidstar)
+    if(NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
+        message(
+            FATAL_ERROR
+            "Antithesis instrumentation requires Debug build type, aborting..."
+        )
+    elseif(NOT is_linux)
+        message(
+            FATAL_ERROR
+            "Antithesis instrumentation requires Linux, aborting..."
+        )
+    elseif(
+        NOT (is_clang AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 16.0)
+    )
+        message(
+            FATAL_ERROR
+            "Antithesis instrumentation requires Clang version 16 or later, aborting..."
+        )
+    endif()
+endif()
 
-if (use_mold)
-  # use mold linker if available
-  execute_process (
-    COMMAND ${CMAKE_CXX_COMPILER} -fuse-ld=mold -Wl,--version
-    ERROR_QUIET OUTPUT_VARIABLE LD_VERSION)
-  if ("${LD_VERSION}" MATCHES "mold")
-    target_link_libraries (common INTERFACE -fuse-ld=mold)
-  endif ()
-  unset (LD_VERSION)
-elseif (use_gold AND is_gcc)
-  # use gold linker if available
-  execute_process (
-    COMMAND ${CMAKE_CXX_COMPILER} -fuse-ld=gold -Wl,--version
-    ERROR_QUIET OUTPUT_VARIABLE LD_VERSION)
+if(use_mold)
+    # use mold linker if available
+    execute_process(
+        COMMAND ${CMAKE_CXX_COMPILER} -fuse-ld=mold -Wl,--version
+        ERROR_QUIET
+        OUTPUT_VARIABLE LD_VERSION
+    )
+    if("${LD_VERSION}" MATCHES "mold")
+        target_link_libraries(common INTERFACE -fuse-ld=mold)
+    endif()
+    unset(LD_VERSION)
+elseif(use_gold AND is_gcc)
+    # use gold linker if available
+    execute_process(
+        COMMAND ${CMAKE_CXX_COMPILER} -fuse-ld=gold -Wl,--version
+        ERROR_QUIET
+        OUTPUT_VARIABLE LD_VERSION
+    )
     #[=========================================================[
        NOTE: THE gold linker inserts -rpath as DT_RUNPATH by
        default instead of DT_RPATH, so you might have slightly
@@ -168,34 +207,37 @@ elseif (use_gold AND is_gcc)
        disabling would be to figure out all the settings
        required to make gold play nicely with jemalloc.
     #]=========================================================]
-  if (("${LD_VERSION}" MATCHES "GNU gold") AND (NOT jemalloc))
-    target_link_libraries (common
-      INTERFACE
-        -fuse-ld=gold
-        -Wl,--no-as-needed
-        #[=========================================================[
+    if(("${LD_VERSION}" MATCHES "GNU gold") AND (NOT jemalloc))
+        target_link_libraries(
+            common
+            INTERFACE
+                -fuse-ld=gold
+                -Wl,--no-as-needed
+                #[=========================================================[
            see https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/1253638/comments/5
            DT_RUNPATH does not work great for transitive
            dependencies (of which boost has a few) - so just
            switch to DT_RPATH if doing dynamic linking with gold
         #]=========================================================]
-        $<$<NOT:$<BOOL:${static}>>:-Wl,--disable-new-dtags>)
-  endif ()
-  unset (LD_VERSION)
-elseif (use_lld)
-  # use lld linker if available
-  execute_process (
-    COMMAND ${CMAKE_CXX_COMPILER} -fuse-ld=lld -Wl,--version
-    ERROR_QUIET OUTPUT_VARIABLE LD_VERSION)
-  if ("${LD_VERSION}" MATCHES "LLD")
-    target_link_libraries (common INTERFACE -fuse-ld=lld)
-  endif ()
-  unset (LD_VERSION)
+                $<$<NOT:$<BOOL:${static}>>:-Wl,--disable-new-dtags>
+        )
+    endif()
+    unset(LD_VERSION)
+elseif(use_lld)
+    # use lld linker if available
+    execute_process(
+        COMMAND ${CMAKE_CXX_COMPILER} -fuse-ld=lld -Wl,--version
+        ERROR_QUIET
+        OUTPUT_VARIABLE LD_VERSION
+    )
+    if("${LD_VERSION}" MATCHES "LLD")
+        target_link_libraries(common INTERFACE -fuse-ld=lld)
+    endif()
+    unset(LD_VERSION)
 endif()
 
-
-if (assert)
-  foreach (var_ CMAKE_C_FLAGS_RELEASE CMAKE_CXX_FLAGS_RELEASE)
-    STRING (REGEX REPLACE "[-/]DNDEBUG" "" ${var_} "${${var_}}")
-  endforeach ()
-endif ()
+if(assert)
+    foreach(var_ CMAKE_C_FLAGS_RELEASE CMAKE_CXX_FLAGS_RELEASE)
+        string(REGEX REPLACE "[-/]DNDEBUG" "" ${var_} "${${var_}}")
+    endforeach()
+endif()

cmake/XrplConfig.cmake

@@ -1,54 +0,0 @@
-include (CMakeFindDependencyMacro)
-# need to represent system dependencies of the lib here
-#[=========================================================[
-  Boost
-#]=========================================================]
-if (static OR APPLE OR MSVC)
-  set (Boost_USE_STATIC_LIBS ON)
-endif ()
-set (Boost_USE_MULTITHREADED ON)
-if (static OR MSVC)
-  set (Boost_USE_STATIC_RUNTIME ON)
-else ()
-  set (Boost_USE_STATIC_RUNTIME OFF)
-endif ()
-find_dependency (Boost
-  COMPONENTS
-    chrono
-    container
-    context
-    coroutine
-    date_time
-    filesystem
-    program_options
-    regex
-    system
-    thread)
-#[=========================================================[
-  OpenSSL
-#]=========================================================]
-if (NOT DEFINED OPENSSL_ROOT_DIR)
-  if (DEFINED ENV{OPENSSL_ROOT})
-    set (OPENSSL_ROOT_DIR $ENV{OPENSSL_ROOT})
-  elseif (APPLE)
-    find_program (homebrew brew)
-    if (homebrew)
-      execute_process (COMMAND ${homebrew} --prefix openssl
-        OUTPUT_VARIABLE OPENSSL_ROOT_DIR
-        OUTPUT_STRIP_TRAILING_WHITESPACE)
-    endif ()
-  endif ()
-  file (TO_CMAKE_PATH "${OPENSSL_ROOT_DIR}" OPENSSL_ROOT_DIR)
-endif ()
-
-if (static OR APPLE OR MSVC)
-  set (OPENSSL_USE_STATIC_LIBS ON)
-endif ()
-set (OPENSSL_MSVC_STATIC_RT ON)
-find_dependency (OpenSSL REQUIRED)
-find_dependency (ZLIB)
-find_dependency (date)
-if (TARGET ZLIB::ZLIB)
-  set_target_properties(OpenSSL::Crypto PROPERTIES
-    INTERFACE_LINK_LIBRARIES ZLIB::ZLIB)
-endif ()

cmake/XrplCore.cmake

@@ -10,62 +10,66 @@ include(target_protobuf_sources)
 # so we just build them as a separate library.
 add_library(xrpl.libpb)
 set_target_properties(xrpl.libpb PROPERTIES UNITY_BUILD OFF)
-target_protobuf_sources(xrpl.libpb xrpl/proto
-  LANGUAGE cpp
-  IMPORT_DIRS include/xrpl/proto
-  PROTOS include/xrpl/proto/xrpl.proto
+target_protobuf_sources(
+    xrpl.libpb
+    xrpl/proto
+    LANGUAGE cpp
+    IMPORT_DIRS include/xrpl/proto
+    PROTOS include/xrpl/proto/xrpl.proto
 )
 
 file(GLOB_RECURSE protos "include/xrpl/proto/org/*.proto")
-target_protobuf_sources(xrpl.libpb xrpl/proto
-  LANGUAGE cpp
-  IMPORT_DIRS include/xrpl/proto
-  PROTOS "${protos}"
+target_protobuf_sources(
+    xrpl.libpb
+    xrpl/proto
+    LANGUAGE cpp
+    IMPORT_DIRS include/xrpl/proto
+    PROTOS "${protos}"
 )
-target_protobuf_sources(xrpl.libpb xrpl/proto
-  LANGUAGE grpc
-  IMPORT_DIRS include/xrpl/proto
-  PROTOS "${protos}"
-  PLUGIN protoc-gen-grpc=$<TARGET_FILE:gRPC::grpc_cpp_plugin>
-  GENERATE_EXTENSIONS .grpc.pb.h .grpc.pb.cc
+target_protobuf_sources(
+    xrpl.libpb
+    xrpl/proto
+    LANGUAGE grpc
+    IMPORT_DIRS include/xrpl/proto
+    PROTOS "${protos}"
+    PLUGIN protoc-gen-grpc=$<TARGET_FILE:gRPC::grpc_cpp_plugin>
+    GENERATE_EXTENSIONS .grpc.pb.h .grpc.pb.cc
 )
 
-target_compile_options(xrpl.libpb
-  PUBLIC
-    $<$<BOOL:${MSVC}>:-wd4996>
-    $<$<BOOL:${XCODE}>:
-      --system-header-prefix="google/protobuf"
-      -Wno-deprecated-dynamic-exception-spec
-    >
-  PRIVATE
-    $<$<BOOL:${MSVC}>:-wd4065>
-    $<$<NOT:$<BOOL:${MSVC}>>:-Wno-deprecated-declarations>
+target_compile_options(
+    xrpl.libpb
+    PUBLIC
+        $<$<BOOL:${is_msvc}>:-wd4996>
+        $<$<BOOL:${is_xcode}>:
+        --system-header-prefix="google/protobuf"
+        -Wno-deprecated-dynamic-exception-spec
+        >
+    PRIVATE
+        $<$<BOOL:${is_msvc}>:-wd4065>
+        $<$<NOT:$<BOOL:${is_msvc}>>:-Wno-deprecated-declarations>
 )
 
-target_link_libraries(xrpl.libpb
-  PUBLIC
-    protobuf::libprotobuf
-    gRPC::grpc++
-)
+target_link_libraries(xrpl.libpb PUBLIC protobuf::libprotobuf gRPC::grpc++)
 
 # TODO: Clean up the number of library targets later.
 add_library(xrpl.imports.main INTERFACE)
 
-target_link_libraries(xrpl.imports.main
-  INTERFACE
-    absl::random_random
-    date::date
-    ed25519::ed25519
-    LibArchive::LibArchive
-    OpenSSL::Crypto
-    Xrpl::boost
-    Xrpl::libs
-    Xrpl::opts
-    Xrpl::syslibs
-    secp256k1::secp256k1
-    xrpl.libpb
-    xxHash::xxhash
-    $<$<BOOL:${voidstar}>:antithesis-sdk-cpp>
+target_link_libraries(
+    xrpl.imports.main
+    INTERFACE
+        absl::random_random
+        date::date
+        ed25519::ed25519
+        LibArchive::LibArchive
+        OpenSSL::Crypto
+        Xrpl::boost
+        Xrpl::libs
+        Xrpl::opts
+        Xrpl::syslibs
+        secp256k1::secp256k1
+        xrpl.libpb
+        xxHash::xxhash
+        $<$<BOOL:${voidstar}>:antithesis-sdk-cpp>
 )
 
 include(add_module)
@@ -74,6 +78,23 @@ include(target_link_modules)
 # Level 01
 add_module(xrpl beast)
 target_link_libraries(xrpl.libxrpl.beast PUBLIC xrpl.imports.main)
+# OTelCollector in beast/insight uses OTel Metrics SDK when telemetry is enabled.
+if(telemetry)
+    target_link_libraries(
+        xrpl.libxrpl.beast
+        PUBLIC opentelemetry-cpp::opentelemetry-cpp
+    )
+endif()
+
+include(GitInfo)
+add_module(xrpl git)
+target_compile_definitions(
+    xrpl.libxrpl.git
+    PRIVATE
+        GIT_COMMIT_HASH="${GIT_COMMIT_HASH}"
+        GIT_BUILD_BRANCH="${GIT_BUILD_BRANCH}"
+)
+target_link_libraries(xrpl.libxrpl.git PUBLIC xrpl.imports.main)
 
 # Level 02
 add_module(xrpl basics)
@@ -88,17 +109,16 @@ target_link_libraries(xrpl.libxrpl.crypto PUBLIC xrpl.libxrpl.basics)
 
 # Level 04
 add_module(xrpl protocol)
-target_link_libraries(xrpl.libxrpl.protocol PUBLIC
-  xrpl.libxrpl.crypto
-  xrpl.libxrpl.json
+target_link_libraries(
+    xrpl.libxrpl.protocol
+    PUBLIC xrpl.libxrpl.crypto xrpl.libxrpl.git xrpl.libxrpl.json
 )
 
 # Level 05
 add_module(xrpl core)
-target_link_libraries(xrpl.libxrpl.core PUBLIC
-  xrpl.libxrpl.basics
-  xrpl.libxrpl.json
-  xrpl.libxrpl.protocol
+target_link_libraries(
+    xrpl.libxrpl.core
+    PUBLIC xrpl.libxrpl.basics xrpl.libxrpl.json xrpl.libxrpl.protocol
 )
 
 # Level 06
@@ -107,61 +127,115 @@ target_link_libraries(xrpl.libxrpl.resource PUBLIC xrpl.libxrpl.protocol)
 
 # Level 07
 add_module(xrpl net)
-target_link_libraries(xrpl.libxrpl.net PUBLIC
-  xrpl.libxrpl.basics
-  xrpl.libxrpl.json
-  xrpl.libxrpl.protocol
-  xrpl.libxrpl.resource
-)
-
-add_module(xrpl server)
-target_link_libraries(xrpl.libxrpl.server PUBLIC xrpl.libxrpl.protocol)
-
-add_module(xrpl nodestore)
-target_link_libraries(xrpl.libxrpl.nodestore PUBLIC
+target_link_libraries(
+    xrpl.libxrpl.net
+    PUBLIC
         xrpl.libxrpl.basics
         xrpl.libxrpl.json
         xrpl.libxrpl.protocol
+        xrpl.libxrpl.resource
+)
+
+add_module(xrpl nodestore)
+target_link_libraries(
+    xrpl.libxrpl.nodestore
+    PUBLIC xrpl.libxrpl.basics xrpl.libxrpl.json xrpl.libxrpl.protocol
 )
 
 add_module(xrpl shamap)
-target_link_libraries(xrpl.libxrpl.shamap PUBLIC
+target_link_libraries(
+    xrpl.libxrpl.shamap
+    PUBLIC
         xrpl.libxrpl.basics
         xrpl.libxrpl.crypto
         xrpl.libxrpl.protocol
         xrpl.libxrpl.nodestore
 )
 
-add_module(xrpl ledger)
-target_link_libraries(xrpl.libxrpl.ledger PUBLIC
-  xrpl.libxrpl.basics
-  xrpl.libxrpl.json
-  xrpl.libxrpl.protocol
+add_module(xrpl rdb)
+target_link_libraries(
+    xrpl.libxrpl.rdb
+    PUBLIC xrpl.libxrpl.basics xrpl.libxrpl.core
 )
 
+add_module(xrpl server)
+target_link_libraries(
+    xrpl.libxrpl.server
+    PUBLIC
+        xrpl.libxrpl.protocol
+        xrpl.libxrpl.core
+        xrpl.libxrpl.rdb
+        xrpl.libxrpl.resource
+)
+
+add_module(xrpl conditions)
+target_link_libraries(xrpl.libxrpl.conditions PUBLIC xrpl.libxrpl.server)
+
+add_module(xrpl ledger)
+target_link_libraries(
+    xrpl.libxrpl.ledger
+    PUBLIC
+        xrpl.libxrpl.basics
+        xrpl.libxrpl.json
+        xrpl.libxrpl.protocol
+        xrpl.libxrpl.rdb
+        xrpl.libxrpl.server
+        xrpl.libxrpl.shamap
+        xrpl.libxrpl.conditions
+)
+
+add_module(xrpl tx)
+target_link_libraries(xrpl.libxrpl.tx PUBLIC xrpl.libxrpl.ledger)
+
+# Telemetry module — OpenTelemetry distributed tracing support.
+# Sources: include/xrpl/telemetry/ (headers), src/libxrpl/telemetry/ (impl).
+# When telemetry=ON, links the Conan-provided umbrella target
+# opentelemetry-cpp::opentelemetry-cpp (individual component targets like
+# ::api, ::sdk are not available in the Conan package).
+add_module(xrpl telemetry)
+target_link_libraries(
+    xrpl.libxrpl.telemetry
+    PUBLIC xrpl.libxrpl.basics xrpl.libxrpl.beast
+)
+if(telemetry)
+    target_link_libraries(
+        xrpl.libxrpl.telemetry
+        PUBLIC opentelemetry-cpp::opentelemetry-cpp
+    )
+endif()
+
 add_library(xrpl.libxrpl)
 set_target_properties(xrpl.libxrpl PROPERTIES OUTPUT_NAME xrpl)
 
 add_library(xrpl::libxrpl ALIAS xrpl.libxrpl)
 
-file(GLOB_RECURSE sources CONFIGURE_DEPENDS
-  "${CMAKE_CURRENT_SOURCE_DIR}/src/libxrpl/*.cpp"
+file(
+    GLOB_RECURSE sources
+    CONFIGURE_DEPENDS
+    "${CMAKE_CURRENT_SOURCE_DIR}/src/libxrpl/*.cpp"
 )
 target_sources(xrpl.libxrpl PRIVATE ${sources})
 
-target_link_modules(xrpl PUBLIC
-  basics
-  beast
-  core
-  crypto
-  json
-  protocol
-  resource
-  server
-  nodestore
-  shamap
-  net
-  ledger
+target_link_modules(
+    xrpl
+    PUBLIC
+    basics
+    beast
+    conditions
+    core
+    crypto
+    git
+    json
+    ledger
+    net
+    nodestore
+    protocol
+    rdb
+    resource
+    server
+    shamap
+    telemetry
+    tx
 )
 
 # All headers in libxrpl are in modules.
@@ -174,62 +248,50 @@ target_link_modules(xrpl PUBLIC
 #     $<INSTALL_INTERFACE:include>)
 
 if(xrpld)
-  add_executable(xrpld)
-  if(tests)
-    target_compile_definitions(xrpld PUBLIC ENABLE_TESTS)
-    target_compile_definitions(xrpld PRIVATE
-                                       UNIT_TEST_REFERENCE_FEE=${UNIT_TEST_REFERENCE_FEE}
+    add_executable(xrpld)
+    if(tests)
+        target_compile_definitions(xrpld PUBLIC ENABLE_TESTS)
+        target_compile_definitions(
+            xrpld
+            PRIVATE UNIT_TEST_REFERENCE_FEE=${UNIT_TEST_REFERENCE_FEE}
+        )
+    endif()
+    target_include_directories(
+        xrpld
+        PRIVATE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
     )
-  endif()
-  target_include_directories(xrpld
-    PRIVATE
-      $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
-  )
 
-  file(GLOB_RECURSE sources CONFIGURE_DEPENDS
-    "${CMAKE_CURRENT_SOURCE_DIR}/src/xrpld/*.cpp"
-  )
-  target_sources(xrpld PRIVATE ${sources})
-
-  if(tests)
-    file(GLOB_RECURSE sources CONFIGURE_DEPENDS
-      "${CMAKE_CURRENT_SOURCE_DIR}/src/test/*.cpp"
+    file(
+        GLOB_RECURSE sources
+        CONFIGURE_DEPENDS
+        "${CMAKE_CURRENT_SOURCE_DIR}/src/xrpld/*.cpp"
     )
     target_sources(xrpld PRIVATE ${sources})
-  endif()
 
-  target_link_libraries(xrpld
-    Xrpl::boost
-    Xrpl::opts
-    Xrpl::libs
-    xrpl.libxrpl
-  )
-  exclude_if_included(xrpld)
-  # define a macro for tests that might need to
-  # be excluded or run differently in CI environment
-  if(is_ci)
-    target_compile_definitions(xrpld PRIVATE XRPL_RUNNING_IN_CI)
-  endif ()
+    if(tests)
+        file(
+            GLOB_RECURSE sources
+            CONFIGURE_DEPENDS
+            "${CMAKE_CURRENT_SOURCE_DIR}/src/test/*.cpp"
+        )
+        target_sources(xrpld PRIVATE ${sources})
+    endif()
 
-  if(voidstar)
-    target_compile_options(xrpld
-      PRIVATE
-        -fsanitize-coverage=trace-pc-guard
-    )
-    # xrpld requires access to antithesis-sdk-cpp implementation file
-    # antithesis_instrumentation.h, which is not exported as INTERFACE
-    target_include_directories(xrpld
-      PRIVATE
-        ${CMAKE_SOURCE_DIR}/external/antithesis-sdk
-    )
-  endif()
+    target_link_libraries(xrpld Xrpl::boost Xrpl::opts Xrpl::libs xrpl.libxrpl)
+    exclude_if_included(xrpld)
+    # define a macro for tests that might need to
+    # be excluded or run differently in CI environment
+    if(is_ci)
+        target_compile_definitions(xrpld PRIVATE XRPL_RUNNING_IN_CI)
+    endif()
 
-  # any files that don't play well with unity should be added here
-  if(tests)
-    set_source_files_properties(
-      # these two seem to produce conflicts in beast teardown template methods
-      src/test/rpc/ValidatorRPC_test.cpp
-      src/test/ledger/Invariants_test.cpp
-      PROPERTIES SKIP_UNITY_BUILD_INCLUSION TRUE)
-  endif()
+    if(voidstar)
+        target_compile_options(xrpld PRIVATE -fsanitize-coverage=trace-pc-guard)
+        # xrpld requires access to antithesis-sdk-cpp implementation file
+        # antithesis_instrumentation.h, which is not exported as INTERFACE
+        target_include_directories(
+            xrpld
+            PRIVATE ${CMAKE_SOURCE_DIR}/external/antithesis-sdk
+        )
+    endif()
 endif()

cmake/XrplCov.cmake

@@ -3,12 +3,15 @@
 #]===================================================================]
 
 if(NOT coverage)
-  message(FATAL_ERROR "Code coverage not enabled! Aborting ...")
+    message(FATAL_ERROR "Code coverage not enabled! Aborting ...")
 endif()
 
 if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
-  message(WARNING "Code coverage on Windows is not supported, ignoring 'coverage' flag")
-  return()
+    message(
+        WARNING
+        "Code coverage on Windows is not supported, ignoring 'coverage' flag"
+    )
+    return()
 endif()
 
 include(ProcessorCount)
@@ -16,26 +19,35 @@ ProcessorCount(PROCESSOR_COUNT)
 
 include(CodeCoverage)
 
-# The instructions for these commands come from the `CodeCoverage` module,
-# which was copied from https://github.com/bilke/cmake-modules, commit fb7d2a3,
-# then locally changed (see CHANGES: section in `CodeCoverage.cmake`)
+# The instructions for these commands come from the `CodeCoverage` module, which was copied from
+# https://github.com/bilke/cmake-modules, commit fb7d2a3, then locally changed (see CHANGES: section in
+# `CodeCoverage.cmake`)
 
 set(GCOVR_ADDITIONAL_ARGS ${coverage_extra_args})
 if(NOT GCOVR_ADDITIONAL_ARGS STREQUAL "")
-  separate_arguments(GCOVR_ADDITIONAL_ARGS)
+    separate_arguments(GCOVR_ADDITIONAL_ARGS)
 endif()
 
-list(APPEND GCOVR_ADDITIONAL_ARGS
-  --exclude-throw-branches
-  --exclude-noncode-lines
-  --exclude-unreachable-branches -s
-  -j ${PROCESSOR_COUNT})
+list(
+    APPEND GCOVR_ADDITIONAL_ARGS
+    --exclude-throw-branches
+    --exclude-noncode-lines
+    --exclude-unreachable-branches
+    -s
+    -j
+    ${PROCESSOR_COUNT}
+)
 
 setup_target_for_coverage_gcovr(
-  NAME coverage
-  FORMAT ${coverage_format}
-  EXCLUDE "src/test" "src/tests" "include/xrpl/beast/test" "include/xrpl/beast/unit_test" "${CMAKE_BINARY_DIR}/pb-xrpl.libpb"
-  DEPENDENCIES xrpld xrpl.tests
+    NAME coverage
+    FORMAT ${coverage_format}
+    EXCLUDE
+        "src/test"
+        "src/tests"
+        "include/xrpl/beast/test"
+        "include/xrpl/beast/unit_test"
+        "${CMAKE_BINARY_DIR}/pb-xrpl.libpb"
+    DEPENDENCIES xrpld xrpl.tests
 )
 
 add_code_coverage_to_target(opts INTERFACE)

cmake/XrplDocs.cmake

@@ -3,13 +3,13 @@
 #]===================================================================]
 
 if(NOT only_docs)
-  return()
+    return()
 endif()
 
 find_package(Doxygen)
 if(NOT TARGET Doxygen::doxygen)
-  message(STATUS "doxygen executable not found -- skipping docs target")
-  return()
+    message(STATUS "doxygen executable not found -- skipping docs target")
+    return()
 endif()
 
 set(doxygen_output_directory "${CMAKE_BINARY_DIR}/docs")
@@ -17,40 +17,44 @@ set(doxygen_include_path "${CMAKE_CURRENT_SOURCE_DIR}/src")
 set(doxygen_index_file "${doxygen_output_directory}/html/index.html")
 set(doxyfile "${CMAKE_CURRENT_SOURCE_DIR}/docs/Doxyfile")
 
-file(GLOB_RECURSE doxygen_input
-  docs/*.md
-  include/*.h
-  include/*.cpp
-  include/*.md
-  src/*.h
-  src/*.cpp
-  src/*.md
-  Builds/*.md
-  *.md)
-list(APPEND doxygen_input
-  external/README.md
-  )
+file(
+    GLOB_RECURSE doxygen_input
+    docs/*.md
+    include/*.h
+    include/*.cpp
+    include/*.md
+    src/*.h
+    src/*.cpp
+    src/*.md
+    Builds/*.md
+    *.md
+)
+list(APPEND doxygen_input external/README.md)
 set(dependencies "${doxygen_input}" "${doxyfile}")
 
 function(verbose_find_path variable name)
-  # find_path sets a CACHE variable, so don't try using a "local" variable.
-  find_path(${variable} "${name}" ${ARGN})
-  if(NOT ${variable})
-    message(NOTICE "could not find ${name}")
-  else()
-    message(STATUS "found ${name}: ${${variable}}/${name}")
-  endif()
+    # find_path sets a CACHE variable, so don't try using a "local" variable.
+    find_path(${variable} "${name}" ${ARGN})
+    if(NOT ${variable})
+        message(NOTICE "could not find ${name}")
+    else()
+        message(STATUS "found ${name}: ${${variable}}/${name}")
+    endif()
 endfunction()
 
-verbose_find_path(doxygen_plantuml_jar_path plantuml.jar PATH_SUFFIXES share/plantuml)
+verbose_find_path(
+    doxygen_plantuml_jar_path
+    plantuml.jar
+    PATH_SUFFIXES share/plantuml
+)
 verbose_find_path(doxygen_dot_path dot)
 
 # https://en.cppreference.com/w/Cppreference:Archives
 # https://stackoverflow.com/questions/60822559/how-to-move-a-file-download-from-configure-step-to-build-step
 set(download_script "${CMAKE_BINARY_DIR}/docs/download-cppreference.cmake")
-file(WRITE
-  "${download_script}"
-  "file(DOWNLOAD \
+file(
+    WRITE "${download_script}"
+    "file(DOWNLOAD \
     https://github.com/PeterFeicht/cppreference-doc/releases/download/v20250209/html-book-20250209.zip \
     ${CMAKE_BINARY_DIR}/docs/cppreference.zip \
     EXPECTED_HASH MD5=bda585f72fbca4b817b29a3d5746567b \
@@ -61,23 +65,27 @@ file(WRITE
 )
 set(tagfile "${CMAKE_BINARY_DIR}/docs/cppreference-doxygen-web.tag.xml")
 add_custom_command(
-  OUTPUT "${tagfile}"
-  COMMAND "${CMAKE_COMMAND}" -P "${download_script}"
-  WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/docs"
+    OUTPUT "${tagfile}"
+    COMMAND "${CMAKE_COMMAND}" -P "${download_script}"
+    WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/docs"
 )
 set(doxygen_tagfiles "${tagfile}=http://en.cppreference.com/w/")
 
 add_custom_command(
-  OUTPUT "${doxygen_index_file}"
-  COMMAND "${CMAKE_COMMAND}" -E env
-    "DOXYGEN_OUTPUT_DIRECTORY=${doxygen_output_directory}"
-    "DOXYGEN_INCLUDE_PATH=${doxygen_include_path}"
-    "DOXYGEN_TAGFILES=${doxygen_tagfiles}"
-    "DOXYGEN_PLANTUML_JAR_PATH=${doxygen_plantuml_jar_path}"
-    "DOXYGEN_DOT_PATH=${doxygen_dot_path}"
-    "${DOXYGEN_EXECUTABLE}" "${doxyfile}"
-  WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
-  DEPENDS "${dependencies}" "${tagfile}")
-add_custom_target(docs
-  DEPENDS "${doxygen_index_file}"
-  SOURCES "${dependencies}")
+    OUTPUT "${doxygen_index_file}"
+    COMMAND
+        "${CMAKE_COMMAND}" -E env
+        "DOXYGEN_OUTPUT_DIRECTORY=${doxygen_output_directory}"
+        "DOXYGEN_INCLUDE_PATH=${doxygen_include_path}"
+        "DOXYGEN_TAGFILES=${doxygen_tagfiles}"
+        "DOXYGEN_PLANTUML_JAR_PATH=${doxygen_plantuml_jar_path}"
+        "DOXYGEN_DOT_PATH=${doxygen_dot_path}" "${DOXYGEN_EXECUTABLE}"
+        "${doxyfile}"
+    WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+    DEPENDS "${dependencies}" "${tagfile}"
+)
+add_custom_target(
+    docs
+    DEPENDS "${doxygen_index_file}"
+    SOURCES "${dependencies}"
+)

cmake/XrplInstall.cmake

@@ -2,79 +2,38 @@
    install stuff
 #]===================================================================]
 
-include(create_symbolic_link)
+include(GNUInstallDirs)
 
-install (
-  TARGETS
-    common
-    opts
-    xrpl_boost
-    xrpl_libs
-    xrpl_syslibs
-    xrpl.imports.main
-    xrpl.libpb
-    xrpl.libxrpl
-    xrpl.libxrpl.basics
-    xrpl.libxrpl.beast
-    xrpl.libxrpl.core
-    xrpl.libxrpl.crypto
-    xrpl.libxrpl.json
-    xrpl.libxrpl.ledger
-    xrpl.libxrpl.net
-    xrpl.libxrpl.nodestore
-    xrpl.libxrpl.protocol
-    xrpl.libxrpl.resource
-    xrpl.libxrpl.server
-    xrpl.libxrpl.shamap
-    antithesis-sdk-cpp
-  EXPORT XrplExports
-  LIBRARY DESTINATION lib
-  ARCHIVE DESTINATION lib
-  RUNTIME DESTINATION bin
-  INCLUDES DESTINATION include)
+if(is_root_project AND TARGET xrpld)
+    install(
+        TARGETS xrpld
+        RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT runtime
+    )
+
+    install(
+        FILES "${CMAKE_CURRENT_SOURCE_DIR}/cfg/xrpld-example.cfg"
+        DESTINATION "${CMAKE_INSTALL_SYSCONFDIR}/xrpld"
+        RENAME xrpld.cfg
+        COMPONENT runtime
+    )
+
+    install(
+        FILES "${CMAKE_CURRENT_SOURCE_DIR}/cfg/validators-example.txt"
+        DESTINATION "${CMAKE_INSTALL_SYSCONFDIR}/xrpld"
+        RENAME validators.txt
+        COMPONENT runtime
+    )
+endif()
 
 install(
-  DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/include/xrpl"
-  DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
+    TARGETS xrpl.libpb xrpl.libxrpl
+    LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT development
+    ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT development
+    RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT development
 )
 
-install (EXPORT XrplExports
-  FILE XrplTargets.cmake
-  NAMESPACE Xrpl::
-  DESTINATION lib/cmake/xrpl)
-include (CMakePackageConfigHelpers)
-write_basic_package_version_file (
-  XrplConfigVersion.cmake
-  VERSION ${xrpld_version}
-  COMPATIBILITY SameMajorVersion)
-
-if (is_root_project AND TARGET xrpld)
-  install (TARGETS xrpld RUNTIME DESTINATION bin)
-  set_target_properties(xrpld PROPERTIES INSTALL_RPATH_USE_LINK_PATH ON)
-  # sample configs should not overwrite existing files
-  # install if-not-exists workaround as suggested by
-  # https://cmake.org/Bug/view.php?id=12646
-  install(CODE "
-    macro (copy_if_not_exists SRC DEST NEWNAME)
-      if (NOT EXISTS \"\$ENV{DESTDIR}\${CMAKE_INSTALL_PREFIX}/\${DEST}/\${NEWNAME}\")
-        file (INSTALL FILE_PERMISSIONS OWNER_READ OWNER_WRITE DESTINATION \"\${CMAKE_INSTALL_PREFIX}/\${DEST}\" FILES \"\${SRC}\" RENAME \"\${NEWNAME}\")
-      else ()
-        message (\"-- Skipping : \$ENV{DESTDIR}\${CMAKE_INSTALL_PREFIX}/\${DEST}/\${NEWNAME}\")
-      endif ()
-    endmacro()
-    copy_if_not_exists(\"${CMAKE_CURRENT_SOURCE_DIR}/cfg/xrpld-example.cfg\" etc xrpld.cfg)
-    copy_if_not_exists(\"${CMAKE_CURRENT_SOURCE_DIR}/cfg/validators-example.txt\" etc validators.txt)
-  ")
-  install(CODE "
-    set(CMAKE_MODULE_PATH \"${CMAKE_MODULE_PATH}\")
-    include(create_symbolic_link)
-    create_symbolic_link(xrpld${suffix} \
-       \$ENV{DESTDIR}\${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/rippled${suffix})
-  ")
-endif ()
-
-install (
-  FILES
-    ${CMAKE_CURRENT_SOURCE_DIR}/cmake/XrplConfig.cmake
-    ${CMAKE_CURRENT_BINARY_DIR}/XrplConfigVersion.cmake
-  DESTINATION lib/cmake/xrpl)
+install(
+    DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/include/xrpl"
+    DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
+    COMPONENT development
+)

cmake/XrplInterface.cmake

@@ -4,80 +4,93 @@
 
 include(CompilationEnv)
 
-add_library (opts INTERFACE)
-add_library (Xrpl::opts ALIAS opts)
-target_compile_definitions (opts
-  INTERFACE
-    BOOST_ASIO_DISABLE_HANDLER_TYPE_REQUIREMENTS
-    BOOST_ASIO_USE_TS_EXECUTOR_AS_DEFAULT
-    BOOST_CONTAINER_FWD_BAD_DEQUE
-    HAS_UNCAUGHT_EXCEPTIONS=1
-    $<$<BOOL:${boost_show_deprecated}>:
-      BOOST_ASIO_NO_DEPRECATED
-      BOOST_FILESYSTEM_NO_DEPRECATED
-    >
-    $<$<NOT:$<BOOL:${boost_show_deprecated}>>:
-      BOOST_COROUTINES_NO_DEPRECATION_WARNING
-      BOOST_BEAST_ALLOW_DEPRECATED
-      BOOST_FILESYSTEM_DEPRECATED
-    >
-    $<$<BOOL:${beast_no_unit_test_inline}>:BEAST_NO_UNIT_TEST_INLINE=1>
-    $<$<BOOL:${beast_disable_autolink}>:BEAST_DONT_AUTOLINK_TO_WIN32_LIBRARIES=1>
-    $<$<BOOL:${single_io_service_thread}>:XRPL_SINGLE_IO_SERVICE_THREAD=1>
-    $<$<BOOL:${voidstar}>:ENABLE_VOIDSTAR>)
-target_compile_options (opts
-  INTERFACE
-    $<$<AND:$<BOOL:${is_gcc}>,$<COMPILE_LANGUAGE:CXX>>:-Wsuggest-override>
-    $<$<BOOL:${is_gcc}>:-Wno-maybe-uninitialized>
-    $<$<BOOL:${perf}>:-fno-omit-frame-pointer>
-    $<$<BOOL:${profile}>:-pg>
-    $<$<AND:$<BOOL:${is_gcc}>,$<BOOL:${profile}>>:-p>)
+# Set defaults for optional variables to avoid uninitialized variable warnings
+if(NOT DEFINED voidstar)
+    set(voidstar OFF)
+endif()
 
-target_link_libraries (opts
-  INTERFACE
-    $<$<BOOL:${profile}>:-pg>
-    $<$<AND:$<BOOL:${is_gcc}>,$<BOOL:${profile}>>:-p>)
+add_library(opts INTERFACE)
+add_library(Xrpl::opts ALIAS opts)
+target_compile_definitions(
+    opts
+    INTERFACE
+        BOOST_ASIO_DISABLE_HANDLER_TYPE_REQUIREMENTS
+        BOOST_ASIO_USE_TS_EXECUTOR_AS_DEFAULT
+        BOOST_CONTAINER_FWD_BAD_DEQUE
+        HAS_UNCAUGHT_EXCEPTIONS=1
+        $<$<BOOL:${boost_show_deprecated}>:
+        BOOST_ASIO_NO_DEPRECATED
+        BOOST_FILESYSTEM_NO_DEPRECATED
+        >
+        $<$<NOT:$<BOOL:${boost_show_deprecated}>>:
+        BOOST_COROUTINES_NO_DEPRECATION_WARNING
+        BOOST_BEAST_ALLOW_DEPRECATED
+        BOOST_FILESYSTEM_DEPRECATED
+        >
+        $<$<BOOL:${beast_no_unit_test_inline}>:BEAST_NO_UNIT_TEST_INLINE=1>
+        $<$<BOOL:${beast_disable_autolink}>:BEAST_DONT_AUTOLINK_TO_WIN32_LIBRARIES=1>
+        $<$<BOOL:${single_io_service_thread}>:XRPL_SINGLE_IO_SERVICE_THREAD=1>
+        $<$<BOOL:${voidstar}>:ENABLE_VOIDSTAR>
+)
+target_compile_options(
+    opts
+    INTERFACE
+        $<$<AND:$<BOOL:${is_gcc}>,$<COMPILE_LANGUAGE:CXX>>:-Wsuggest-override>
+        $<$<BOOL:${is_gcc}>:-Wno-maybe-uninitialized>
+        $<$<BOOL:${perf}>:-fno-omit-frame-pointer>
+        $<$<BOOL:${profile}>:-pg>
+        $<$<AND:$<BOOL:${is_gcc}>,$<BOOL:${profile}>>:-p>
+)
+
+target_link_libraries(
+    opts
+    INTERFACE
+        $<$<BOOL:${profile}>:-pg>
+        $<$<AND:$<BOOL:${is_gcc}>,$<BOOL:${profile}>>:-p>
+)
 
 if(jemalloc)
-  find_package(jemalloc REQUIRED)
-  target_compile_definitions(opts INTERFACE PROFILE_JEMALLOC)
-  target_link_libraries(opts INTERFACE jemalloc::jemalloc)
-endif ()
+    find_package(jemalloc REQUIRED)
+    target_compile_definitions(opts INTERFACE PROFILE_JEMALLOC)
+    target_link_libraries(opts INTERFACE jemalloc::jemalloc)
+endif()
 
 #[===================================================================[
    xrpld transitive library deps via an interface library
 #]===================================================================]
 
-add_library (xrpl_syslibs INTERFACE)
-add_library (Xrpl::syslibs ALIAS xrpl_syslibs)
-target_link_libraries (xrpl_syslibs
-  INTERFACE
-    $<$<BOOL:${MSVC}>:
-      legacy_stdio_definitions.lib
-      Shlwapi
-      kernel32
-      user32
-      gdi32
-      winspool
-      comdlg32
-      advapi32
-      shell32
-      ole32
-      oleaut32
-      uuid
-      odbc32
-      odbccp32
-      crypt32
-    >
-    $<$<NOT:$<BOOL:${MSVC}>>:dl>
-    $<$<NOT:$<OR:$<BOOL:${MSVC}>,$<BOOL:${APPLE}>>>:rt>)
+add_library(xrpl_syslibs INTERFACE)
+add_library(Xrpl::syslibs ALIAS xrpl_syslibs)
+target_link_libraries(
+    xrpl_syslibs
+    INTERFACE
+        $<$<BOOL:${is_msvc}>:
+        legacy_stdio_definitions.lib
+        Shlwapi
+        kernel32
+        user32
+        gdi32
+        winspool
+        comdlg32
+        advapi32
+        shell32
+        ole32
+        oleaut32
+        uuid
+        odbc32
+        odbccp32
+        crypt32
+        >
+        $<$<NOT:$<BOOL:${is_msvc}>>:dl>
+        $<$<NOT:$<OR:$<BOOL:${is_msvc}>,$<BOOL:${is_macos}>>>:rt>
+)
 
-if (NOT MSVC)
-  set (THREADS_PREFER_PTHREAD_FLAG ON)
-  find_package (Threads)
-  target_link_libraries (xrpl_syslibs INTERFACE Threads::Threads)
-endif ()
+if(NOT is_msvc)
+    set(THREADS_PREFER_PTHREAD_FLAG ON)
+    find_package(Threads)
+    target_link_libraries(xrpl_syslibs INTERFACE Threads::Threads)
+endif()
 
-add_library (xrpl_libs INTERFACE)
-add_library (Xrpl::libs ALIAS xrpl_libs)
-target_link_libraries (xrpl_libs INTERFACE Xrpl::syslibs)
+add_library(xrpl_libs INTERFACE)
+add_library(Xrpl::libs ALIAS xrpl_libs)
+target_link_libraries(xrpl_libs INTERFACE Xrpl::syslibs)

cmake/XrplSanitizers.cmake

@@ -43,7 +43,10 @@
 include(CompilationEnv)
 
 # Read environment variable
-set(SANITIZERS $ENV{SANITIZERS})
+set(SANITIZERS "")
+if(DEFINED ENV{SANITIZERS})
+    set(SANITIZERS "$ENV{SANITIZERS}")
+endif()
 
 # Set SANITIZERS_ENABLED flag for use in other modules
 if(SANITIZERS MATCHES "address|thread|undefinedbehavior")
@@ -55,8 +58,11 @@ endif()
 
 # Sanitizers are not supported on Windows/MSVC
 if(is_msvc)
-    message(FATAL_ERROR "Sanitizers are not supported on Windows/MSVC. "
-            "Please unset the SANITIZERS environment variable.")
+    message(
+        FATAL_ERROR
+        "Sanitizers are not supported on Windows/MSVC. "
+        "Please unset the SANITIZERS environment variable."
+    )
 endif()
 
 message(STATUS "Configuring sanitizers: ${SANITIZERS}")
@@ -79,15 +85,21 @@ foreach(san IN LISTS san_list)
     elseif(san STREQUAL "undefinedbehavior")
         set(enable_ubsan TRUE)
     else()
-        message(FATAL_ERROR "Unsupported sanitizer type: ${san}"
-              "Supported: address, thread, undefinedbehavior and their combinations.")
+        message(
+            FATAL_ERROR
+            "Unsupported sanitizer type: ${san}"
+            "Supported: address, thread, undefinedbehavior and their combinations."
+        )
     endif()
 endforeach()
 
 # Validate sanitizer compatibility
 if(enable_asan AND enable_tsan)
-    message(FATAL_ERROR "AddressSanitizer and ThreadSanitizer are incompatible and cannot be enabled simultaneously. "
-          "Use 'address' or 'thread', optionally with 'undefinedbehavior'.")
+    message(
+        FATAL_ERROR
+        "AddressSanitizer and ThreadSanitizer are incompatible and cannot be enabled simultaneously. "
+        "Use 'address' or 'thread', optionally with 'undefinedbehavior'."
+    )
 endif()
 
 # Frame pointer is required for meaningful stack traces. Sanitizers recommend minimum of -O1 for reasonable performance
@@ -106,25 +118,28 @@ if(enable_ubsan)
     # UB sanitizer flags
     list(APPEND SANITIZER_TYPES "undefined" "float-divide-by-zero")
     if(is_clang)
-        # Clang supports additional UB checks. More info here https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html
+        # Clang supports additional UB checks. More info here
+        # https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html
         list(APPEND SANITIZER_TYPES "unsigned-integer-overflow")
     endif()
 endif()
 
-# Configure code model for GCC on amd64
-# Use large code model for ASAN to avoid relocation errors
-# Use medium code model for TSAN (large is not compatible with TSAN)
+# Configure code model for GCC on amd64 Use large code model for ASAN to avoid relocation errors Use medium code model
+# for TSAN (large is not compatible with TSAN)
 set(SANITIZERS_RELOCATION_FLAGS)
 
 # Compiler-specific configuration
 if(is_gcc)
-    # Disable mold, gold and lld linkers for GCC with sanitizers
-    # Use default linker (bfd/ld) which is more lenient with mixed code models
-    # This is needed since the size of instrumented binary exceeds the limits set by mold, lld and gold linkers
+    # Disable mold, gold and lld linkers for GCC with sanitizers Use default linker (bfd/ld) which is more lenient with
+    # mixed code models This is needed since the size of instrumented binary exceeds the limits set by mold, lld and
+    # gold linkers
     set(use_mold OFF CACHE BOOL "Use mold linker" FORCE)
     set(use_gold OFF CACHE BOOL "Use gold linker" FORCE)
     set(use_lld OFF CACHE BOOL "Use lld linker" FORCE)
-    message(STATUS "  Disabled mold, gold, and lld linkers for GCC with sanitizers")
+    message(
+        STATUS
+        "  Disabled mold, gold, and lld linkers for GCC with sanitizers"
+    )
 
     # Suppress false positive warnings in GCC with stringop-overflow
     list(APPEND SANITIZERS_COMPILE_FLAGS "-Wno-stringop-overflow")
@@ -146,17 +161,26 @@ if(is_gcc)
 
     # Add sanitizer to compile and link flags
     list(APPEND SANITIZERS_COMPILE_FLAGS "-fsanitize=${SANITIZER_TYPES_STR}")
-    set(SANITIZERS_LINK_FLAGS "${SANITIZERS_RELOCATION_FLAGS}" "-fsanitize=${SANITIZER_TYPES_STR}")
-
+    set(SANITIZERS_LINK_FLAGS
+        "${SANITIZERS_RELOCATION_FLAGS}"
+        "-fsanitize=${SANITIZER_TYPES_STR}"
+    )
 elseif(is_clang)
-    # Add ignorelist for Clang (GCC doesn't support this)
-    # Use CMAKE_SOURCE_DIR to get the path to the ignorelist
-    set(IGNORELIST_PATH "${CMAKE_SOURCE_DIR}/sanitizers/suppressions/sanitizer-ignorelist.txt")
+    # Add ignorelist for Clang (GCC doesn't support this) Use CMAKE_SOURCE_DIR to get the path to the ignorelist
+    set(IGNORELIST_PATH
+        "${CMAKE_SOURCE_DIR}/sanitizers/suppressions/sanitizer-ignorelist.txt"
+    )
     if(NOT EXISTS "${IGNORELIST_PATH}")
-        message(FATAL_ERROR "Sanitizer ignorelist not found: ${IGNORELIST_PATH}")
+        message(
+            FATAL_ERROR
+            "Sanitizer ignorelist not found: ${IGNORELIST_PATH}"
+        )
     endif()
 
-    list(APPEND SANITIZERS_COMPILE_FLAGS "-fsanitize-ignorelist=${IGNORELIST_PATH}")
+    list(
+        APPEND SANITIZERS_COMPILE_FLAGS
+        "-fsanitize-ignorelist=${IGNORELIST_PATH}"
+    )
     message(STATUS "  Using sanitizer ignorelist: ${IGNORELIST_PATH}")
 
     # Join sanitizer flags with commas for -fsanitize option
@@ -170,11 +194,12 @@ endif()
 message(STATUS "  Compile flags: ${SANITIZERS_COMPILE_FLAGS}")
 message(STATUS "  Link flags: ${SANITIZERS_LINK_FLAGS}")
 
-# Apply the sanitizer flags to the 'common' interface library
-# This is the same library used by XrplCompiler.cmake
-target_compile_options(common INTERFACE
-    $<$<COMPILE_LANGUAGE:CXX>:${SANITIZERS_COMPILE_FLAGS}>
-    $<$<COMPILE_LANGUAGE:C>:${SANITIZERS_COMPILE_FLAGS}>
+# Apply the sanitizer flags to the 'common' interface library This is the same library used by XrplCompiler.cmake
+target_compile_options(
+    common
+    INTERFACE
+        $<$<COMPILE_LANGUAGE:CXX>:${SANITIZERS_COMPILE_FLAGS}>
+        $<$<COMPILE_LANGUAGE:C>:${SANITIZERS_COMPILE_FLAGS}>
 )
 
 # Apply linker flags

cmake/XrplSanity.cmake

@@ -6,40 +6,57 @@ include(CompilationEnv)
 
 get_property(is_multiconfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
 
-set (CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "" FORCE)
-if (NOT is_multiconfig)
-  if (NOT CMAKE_BUILD_TYPE)
-    message (STATUS "Build type not specified - defaulting to Release")
-    set (CMAKE_BUILD_TYPE Release CACHE STRING "build type" FORCE)
-  elseif (NOT (CMAKE_BUILD_TYPE STREQUAL Debug OR CMAKE_BUILD_TYPE STREQUAL Release))
-    # for simplicity, these are the only two config types we care about. Limiting
-    # the build types simplifies dealing with external project builds especially
-    message (FATAL_ERROR " *** Only Debug or Release build types are currently supported ***")
-  endif ()
-endif ()
+set(CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "" FORCE)
+if(NOT is_multiconfig)
+    if(NOT CMAKE_BUILD_TYPE)
+        message(STATUS "Build type not specified - defaulting to Release")
+        set(CMAKE_BUILD_TYPE Release CACHE STRING "build type" FORCE)
+    elseif(
+        NOT (CMAKE_BUILD_TYPE STREQUAL Debug OR CMAKE_BUILD_TYPE STREQUAL Release)
+    )
+        # for simplicity, these are the only two config types we care about. Limiting the build types simplifies dealing
+        # with external project builds especially
+        message(
+            FATAL_ERROR
+            " *** Only Debug or Release build types are currently supported ***"
+        )
+    endif()
+endif()
 
-if (is_clang) # both Clang and AppleClang
-  if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" AND
-         CMAKE_CXX_COMPILER_VERSION VERSION_LESS 16.0)
-    message (FATAL_ERROR "This project requires clang 16 or later")
-  endif ()
-elseif (is_gcc)
-  if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 12.0)
-    message (FATAL_ERROR "This project requires GCC 12 or later")
-  endif ()
-endif ()
+if(is_clang) # both Clang and AppleClang
+    if(
+        "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang"
+        AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 16.0
+    )
+        message(FATAL_ERROR "This project requires clang 16 or later")
+    endif()
+elseif(is_gcc)
+    if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 12.0)
+        message(FATAL_ERROR "This project requires GCC 12 or later")
+    endif()
+endif()
 
 # check for in-source build and fail
-if ("${CMAKE_CURRENT_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
-  message (FATAL_ERROR "Builds (in-source) are not allowed in "
-    "${CMAKE_CURRENT_SOURCE_DIR}. Please remove CMakeCache.txt and the CMakeFiles "
-    "directory from ${CMAKE_CURRENT_SOURCE_DIR} and try building in a separate directory.")
-endif ()
+if("${CMAKE_CURRENT_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
+    message(
+        FATAL_ERROR
+        "Builds (in-source) are not allowed in "
+        "${CMAKE_CURRENT_SOURCE_DIR}. Please remove CMakeCache.txt and the CMakeFiles "
+        "directory from ${CMAKE_CURRENT_SOURCE_DIR} and try building in a separate directory."
+    )
+endif()
 
-if (MSVC AND CMAKE_GENERATOR_PLATFORM STREQUAL "Win32")
-  message (FATAL_ERROR "Visual Studio 32-bit build is not supported.")
-endif ()
+if(MSVC AND CMAKE_GENERATOR_PLATFORM STREQUAL "Win32")
+    message(FATAL_ERROR "Visual Studio 32-bit build is not supported.")
+endif()
 
-if (APPLE AND NOT HOMEBREW)
-  find_program (HOMEBREW brew)
-endif ()
+if(voidstar AND NOT is_amd64)
+    message(
+        FATAL_ERROR
+        "The voidstar library only supported on amd64/x86_64. Detected archictecture was: ${CMAKE_SYSTEM_PROCESSOR}"
+    )
+endif()
+
+if(APPLE AND NOT HOMEBREW)
+    find_program(HOMEBREW brew)
+endif()

cmake/XrplSettings.cmake

@@ -4,17 +4,18 @@
 
 include(CompilationEnv)
 
-if("$ENV{CI}" STREQUAL "true" OR "$ENV{CONTINUOUS_INTEGRATION}" STREQUAL "true")
-  set(is_ci TRUE)
-else()
-  set(is_ci FALSE)
+set(is_ci FALSE)
+if(DEFINED ENV{CI})
+    if("$ENV{CI}" STREQUAL "true")
+        set(is_ci TRUE)
+    endif()
 endif()
 
 get_directory_property(has_parent PARENT_DIRECTORY)
 if(has_parent)
-  set(is_root_project OFF)
+    set(is_root_project OFF)
 else()
-  set(is_root_project ON)
+    set(is_root_project ON)
 endif()
 
 option(assert "Enables asserts, even in release builds" OFF)
@@ -23,106 +24,132 @@ option(xrpld "Build xrpld" ON)
 
 option(tests "Build tests" ON)
 if(tests)
-  # This setting allows making a separate workflow to test fees other than default 10
-  if(NOT UNIT_TEST_REFERENCE_FEE)
-    set(UNIT_TEST_REFERENCE_FEE "10" CACHE STRING "")
-  endif()
+    # This setting allows making a separate workflow to test fees other than default 10
+    if(NOT UNIT_TEST_REFERENCE_FEE)
+        set(UNIT_TEST_REFERENCE_FEE "10" CACHE STRING "")
+    endif()
 endif()
 
 option(unity "Creates a build using UNITY support in cmake." OFF)
 if(unity)
-  if(NOT is_ci)
-    set(CMAKE_UNITY_BUILD_BATCH_SIZE 15 CACHE STRING "")
-  endif()
-  set(CMAKE_UNITY_BUILD ON CACHE BOOL "Do a unity build")
+    if(NOT is_ci)
+        set(CMAKE_UNITY_BUILD_BATCH_SIZE 15 CACHE STRING "")
+    endif()
+    set(CMAKE_UNITY_BUILD ON CACHE BOOL "Do a unity build")
 endif()
 
 if(is_clang AND is_linux)
-  option(voidstar "Enable Antithesis instrumentation." OFF)
+    option(voidstar "Enable Antithesis instrumentation." OFF)
 endif()
 
 if(is_gcc OR is_clang)
-  include(ProcessorCount)
-  ProcessorCount(PROCESSOR_COUNT)
+    include(ProcessorCount)
+    ProcessorCount(PROCESSOR_COUNT)
 
-  option(coverage "Generates coverage info." OFF)
-  option(profile "Add profiling flags" OFF)
-  set(coverage_format "html-details" CACHE STRING
-    "Output format of the coverage report.")
-  set(coverage_extra_args "" CACHE STRING
-    "Additional arguments to pass to gcovr.")
-  option(wextra "compile with extra gcc/clang warnings enabled" ON)
+    option(coverage "Generates coverage info." OFF)
+    option(profile "Add profiling flags" OFF)
+    set(coverage_format
+        "html-details"
+        CACHE STRING
+        "Output format of the coverage report."
+    )
+    set(coverage_extra_args
+        ""
+        CACHE STRING
+        "Additional arguments to pass to gcovr."
+    )
+    option(wextra "compile with extra gcc/clang warnings enabled" ON)
 else()
-  set(profile OFF CACHE BOOL "gcc/clang only" FORCE)
-  set(coverage OFF CACHE BOOL "gcc/clang only" FORCE)
-  set(wextra OFF CACHE BOOL "gcc/clang only" FORCE)
+    set(profile OFF CACHE BOOL "gcc/clang only" FORCE)
+    set(coverage OFF CACHE BOOL "gcc/clang only" FORCE)
+    set(wextra OFF CACHE BOOL "gcc/clang only" FORCE)
 endif()
 
 if(is_linux AND NOT SANITIZER)
-  option(BUILD_SHARED_LIBS "build shared xrpl libraries" OFF)
-  option(static "link protobuf, openssl, libc++, and boost statically" ON)
-  option(perf "Enables flags that assist with perf recording" OFF)
-  option(use_gold "enables detection of gold (binutils) linker" ON)
-  option(use_mold "enables detection of mold (binutils) linker" ON)
-  # Set a default value for the log flag based on the build type.
-  # This provides a sensible default (on for debug, off for release)
-  # while still allowing the user to override it for any build.
-  if(CMAKE_BUILD_TYPE STREQUAL "Debug")
-    set(TRUNCATED_LOGS_DEFAULT ON)
-  else()
-    set(TRUNCATED_LOGS_DEFAULT OFF)
-  endif()
-  option(TRUNCATED_THREAD_NAME_LOGS
-    "Show warnings about truncated thread names on Linux."
-    ${TRUNCATED_LOGS_DEFAULT}
-  )
-  if(TRUNCATED_THREAD_NAME_LOGS)
-    add_compile_definitions(TRUNCATED_THREAD_NAME_LOGS)
-  endif()
+    option(BUILD_SHARED_LIBS "build shared xrpl libraries" OFF)
+    option(static "link protobuf, openssl, libc++, and boost statically" ON)
+    option(perf "Enables flags that assist with perf recording" OFF)
+    option(use_gold "enables detection of gold (binutils) linker" ON)
+    option(use_mold "enables detection of mold (binutils) linker" ON)
+    # Set a default value for the log flag based on the build type. This provides a sensible default (on for debug, off
+    # for release) while still allowing the user to override it for any build.
+    if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+        set(TRUNCATED_LOGS_DEFAULT ON)
+    else()
+        set(TRUNCATED_LOGS_DEFAULT OFF)
+    endif()
+    option(
+        TRUNCATED_THREAD_NAME_LOGS
+        "Show warnings about truncated thread names on Linux."
+        ${TRUNCATED_LOGS_DEFAULT}
+    )
+    if(TRUNCATED_THREAD_NAME_LOGS)
+        add_compile_definitions(TRUNCATED_THREAD_NAME_LOGS)
+    endif()
 else()
-  # we are not ready to allow shared-libs on windows because it would require
-  # export declarations. On macos it's more feasible, but static openssl
-  # produces odd linker errors, thus we disable shared lib builds for now.
-  set(BUILD_SHARED_LIBS OFF CACHE BOOL "build shared xrpl libraries - OFF for win/macos" FORCE)
-  set(static ON CACHE BOOL "static link, linux only. ON for WIN/macos" FORCE)
-  set(perf OFF CACHE BOOL "perf flags, linux only" FORCE)
-  set(use_gold OFF CACHE BOOL "gold linker, linux only" FORCE)
-  set(use_mold OFF CACHE BOOL "mold linker, linux only" FORCE)
+    # we are not ready to allow shared-libs on windows because it would require export declarations. On macos it's more
+    # feasible, but static openssl produces odd linker errors, thus we disable shared lib builds for now.
+    set(BUILD_SHARED_LIBS
+        OFF
+        CACHE BOOL
+        "build shared xrpl libraries - OFF for win/macos"
+        FORCE
+    )
+    set(static ON CACHE BOOL "static link, linux only. ON for WIN/macos" FORCE)
+    set(perf OFF CACHE BOOL "perf flags, linux only" FORCE)
+    set(use_gold OFF CACHE BOOL "gold linker, linux only" FORCE)
+    set(use_mold OFF CACHE BOOL "mold linker, linux only" FORCE)
 endif()
 
 if(is_clang)
-  option(use_lld "enables detection of lld linker" ON)
+    option(use_lld "enables detection of lld linker" ON)
 else()
-  set(use_lld OFF CACHE BOOL "try lld linker, clang only" FORCE)
+    set(use_lld OFF CACHE BOOL "try lld linker, clang only" FORCE)
 endif()
 
 option(jemalloc "Enables jemalloc for heap profiling" OFF)
 option(werr "treat warnings as errors" OFF)
-option(local_protobuf
-  "Force a local build of protobuf instead of looking for an installed version." OFF)
-option(local_grpc
-  "Force a local build of gRPC instead of looking for an installed version." OFF)
+option(
+    local_protobuf
+    "Force a local build of protobuf instead of looking for an installed version."
+    OFF
+)
+option(
+    local_grpc
+    "Force a local build of gRPC instead of looking for an installed version."
+    OFF
+)
 
 # the remaining options are obscure and rarely used
-option(beast_no_unit_test_inline
-  "Prevents unit test definitions from being inserted into global table"
-  OFF)
-option(single_io_service_thread
-  "Restricts the number of threads calling io_context::run to one. \
+option(
+    beast_no_unit_test_inline
+    "Prevents unit test definitions from being inserted into global table"
+    OFF
+)
+option(
+    single_io_service_thread
+    "Restricts the number of threads calling io_context::run to one. \
   This can be useful when debugging."
-  OFF)
-option(boost_show_deprecated
-  "Allow boost to fail on deprecated usage. Only useful if you're trying\
+    OFF
+)
+option(
+    boost_show_deprecated
+    "Allow boost to fail on deprecated usage. Only useful if you're trying\
   to find deprecated calls."
-  OFF)
+    OFF
+)
 
 if(WIN32)
-  option(beast_disable_autolink "Disables autolinking of system libraries on WIN32" OFF)
+    option(
+        beast_disable_autolink
+        "Disables autolinking of system libraries on WIN32"
+        OFF
+    )
 else()
-  set(beast_disable_autolink OFF CACHE BOOL "WIN32 only" FORCE)
+    set(beast_disable_autolink OFF CACHE BOOL "WIN32 only" FORCE)
 endif()
 
 if(coverage)
-  message(STATUS "coverage build requested - forcing Debug build")
-  set(CMAKE_BUILD_TYPE Debug CACHE STRING "build type" FORCE)
+    message(STATUS "coverage build requested - forcing Debug build")
+    set(CMAKE_BUILD_TYPE Debug CACHE STRING "build type" FORCE)
 endif()

cmake/XrplValidatorKeys.cmake

@@ -1,20 +1,26 @@
-option (validator_keys "Enables building of validator-keys tool as a separate target (imported via FetchContent)" OFF)
-
-if (validator_keys)
-  git_branch (current_branch)
-  # default to tracking VK master branch unless we are on release
-  if (NOT (current_branch STREQUAL "release"))
-    set (current_branch "master")
-  endif ()
-  message (STATUS "Tracking ValidatorKeys branch: ${current_branch}")
-
-  FetchContent_Declare (
+option(
     validator_keys
-    GIT_REPOSITORY https://github.com/ripple/validator-keys-tool.git
-    GIT_TAG        "${current_branch}"
-  )
-  FetchContent_MakeAvailable(validator_keys)
-  set_target_properties(validator-keys PROPERTIES RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}")
-  install(TARGETS validator-keys RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+    "Enables building of validator-keys tool as a separate target (imported via FetchContent)"
+    OFF
+)
 
-endif ()
+if(validator_keys)
+    git_branch(current_branch)
+    # default to tracking VK master branch unless we are on release
+    if(NOT (current_branch STREQUAL "release"))
+        set(current_branch "master")
+    endif()
+    message(STATUS "Tracking ValidatorKeys branch: ${current_branch}")
+
+    FetchContent_Declare(
+        validator_keys
+        GIT_REPOSITORY https://github.com/ripple/validator-keys-tool.git
+        GIT_TAG "${current_branch}"
+    )
+    FetchContent_MakeAvailable(validator_keys)
+    set_target_properties(
+        validator-keys
+        PROPERTIES RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}"
+    )
+    install(TARGETS validator-keys RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+endif()

cmake/XrplVersion.cmake

@@ -4,12 +4,12 @@
 
 file(STRINGS src/libxrpl/protocol/BuildInfo.cpp BUILD_INFO)
 foreach(line_ ${BUILD_INFO})
-  if(line_ MATCHES "versionString[ ]*=[ ]*\"(.+)\"")
-    set(xrpld_version ${CMAKE_MATCH_1})
-  endif()
+    if(line_ MATCHES "versionString[ ]*=[ ]*\"(.+)\"")
+        set(xrpld_version ${CMAKE_MATCH_1})
+    endif()
 endforeach()
 if(xrpld_version)
-  message(STATUS "xrpld version: ${xrpld_version}")
+    message(STATUS "xrpld version: ${xrpld_version}")
 else()
-  message(FATAL_ERROR "unable to determine xrpld version")
+    message(FATAL_ERROR "unable to determine xrpld version")
 endif()

cmake/add_module.cmake

@@ -13,25 +13,28 @@ include(isolate_headers)
 # add_module(parent b)
 # target_link_libraries(project.libparent.b PUBLIC project.libparent.a)
 function(add_module parent name)
-  set(target ${PROJECT_NAME}.lib${parent}.${name})
-  add_library(${target} OBJECT)
-  file(GLOB_RECURSE sources CONFIGURE_DEPENDS
-    "${CMAKE_CURRENT_SOURCE_DIR}/src/lib${parent}/${name}/*.cpp"
-  )
-  target_sources(${target} PRIVATE ${sources})
-  target_include_directories(${target} PUBLIC
-    "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
-  )
-  isolate_headers(
-    ${target}
-    "${CMAKE_CURRENT_SOURCE_DIR}/include"
-    "${CMAKE_CURRENT_SOURCE_DIR}/include/${parent}/${name}"
-    PUBLIC
-  )
-  isolate_headers(
-    ${target}
-    "${CMAKE_CURRENT_SOURCE_DIR}/src"
-    "${CMAKE_CURRENT_SOURCE_DIR}/src/lib${parent}/${name}"
-    PRIVATE
-  )
+    set(target ${PROJECT_NAME}.lib${parent}.${name})
+    add_library(${target} OBJECT)
+    file(
+        GLOB_RECURSE sources
+        CONFIGURE_DEPENDS
+        "${CMAKE_CURRENT_SOURCE_DIR}/src/lib${parent}/${name}/*.cpp"
+    )
+    target_sources(${target} PRIVATE ${sources})
+    target_include_directories(
+        ${target}
+        PUBLIC "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
+    )
+    isolate_headers(
+        ${target}
+        "${CMAKE_CURRENT_SOURCE_DIR}/include"
+        "${CMAKE_CURRENT_SOURCE_DIR}/include/${parent}/${name}"
+        PUBLIC
+    )
+    isolate_headers(
+        ${target}
+        "${CMAKE_CURRENT_SOURCE_DIR}/src"
+        "${CMAKE_CURRENT_SOURCE_DIR}/src/lib${parent}/${name}"
+        PRIVATE
+    )
 endfunction()

cmake/create_symbolic_link.cmake

@@ -1,20 +1,21 @@
-# file(CREATE_SYMLINK) only works on Windows with administrator privileges.
-# https://stackoverflow.com/a/61244115/618906
+# file(CREATE_SYMLINK) only works on Windows with administrator privileges. https://stackoverflow.com/a/61244115/618906
 function(create_symbolic_link target link)
-  if(WIN32)
-    if(NOT IS_SYMLINK "${link}")
-      if(NOT IS_ABSOLUTE "${target}")
-        # Relative links work do not work on Windows.
-        set(target "${link}/../${target}")
-      endif()
-      file(TO_NATIVE_PATH "${target}" target)
-      file(TO_NATIVE_PATH "${link}" link)
-      execute_process(COMMAND cmd.exe /c mklink /J "${link}" "${target}")
+    if(WIN32)
+        if(NOT IS_SYMLINK "${link}")
+            if(NOT IS_ABSOLUTE "${target}")
+                # Relative links work do not work on Windows.
+                set(target "${link}/../${target}")
+            endif()
+            file(TO_NATIVE_PATH "${target}" target)
+            file(TO_NATIVE_PATH "${link}" link)
+            execute_process(
+                COMMAND cmd.exe /c mklink /J "${link}" "${target}"
+            )
+        endif()
+    else()
+        file(CREATE_LINK "${target}" "${link}" SYMBOLIC)
+    endif()
+    if(NOT IS_SYMLINK "${link}")
+        message(ERROR "failed to create symlink: <${link}>")
     endif()
-  else()
-    file(CREATE_LINK "${target}" "${link}" SYMBOLIC)
-  endif()
-  if(NOT IS_SYMLINK "${link}")
-    message(ERROR "failed to create symlink: <${link}>")
-  endif()
 endfunction()

cmake/deps/Boost.cmake

@@ -1,50 +1,60 @@
 include(CompilationEnv)
 include(XrplSanitizers)
 
-find_package(Boost REQUIRED
-  COMPONENTS
-    chrono
-    container
-    coroutine
-    date_time
-    filesystem
-    json
-    program_options
-    regex
-    system
-    thread
+find_package(
+    Boost
+    REQUIRED
+    COMPONENTS
+        chrono
+        container
+        coroutine
+        date_time
+        filesystem
+        json
+        program_options
+        regex
+        system
+        thread
 )
 
 add_library(xrpl_boost INTERFACE)
 add_library(Xrpl::boost ALIAS xrpl_boost)
 
-target_link_libraries(xrpl_boost
-  INTERFACE
-    Boost::headers
-    Boost::chrono
-    Boost::container
-    Boost::coroutine
-    Boost::date_time
-    Boost::filesystem
-    Boost::json
-    Boost::process
-    Boost::program_options
-    Boost::regex
-    Boost::system
-    Boost::thread)
+target_link_libraries(
+    xrpl_boost
+    INTERFACE
+        Boost::headers
+        Boost::chrono
+        Boost::container
+        Boost::coroutine
+        Boost::date_time
+        Boost::filesystem
+        Boost::json
+        Boost::process
+        Boost::program_options
+        Boost::regex
+        Boost::thread
+)
 if(Boost_COMPILER)
-  target_link_libraries(xrpl_boost INTERFACE Boost::disable_autolinking)
+    target_link_libraries(xrpl_boost INTERFACE Boost::disable_autolinking)
 endif()
 if(SANITIZERS_ENABLED AND is_clang)
-  # TODO: gcc does not support -fsanitize-blacklist...can we do something else
-  # for gcc ?
-  if(NOT Boost_INCLUDE_DIRS AND TARGET Boost::headers)
-    get_target_property(Boost_INCLUDE_DIRS Boost::headers INTERFACE_INCLUDE_DIRECTORIES)
-  endif()
-  message(STATUS "Adding [${Boost_INCLUDE_DIRS}] to sanitizer blacklist")
-  file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/san_bl.txt "src:${Boost_INCLUDE_DIRS}/*")
-  target_compile_options(opts
-    INTERFACE
-      # ignore boost headers for sanitizing
-      -fsanitize-blacklist=${CMAKE_CURRENT_BINARY_DIR}/san_bl.txt)
+    # TODO: gcc does not support -fsanitize-blacklist...can we do something else for gcc ?
+    if(NOT Boost_INCLUDE_DIRS AND TARGET Boost::headers)
+        get_target_property(
+            Boost_INCLUDE_DIRS
+            Boost::headers
+            INTERFACE_INCLUDE_DIRECTORIES
+        )
+    endif()
+    message(STATUS "Adding [${Boost_INCLUDE_DIRS}] to sanitizer blacklist")
+    file(
+        WRITE ${CMAKE_CURRENT_BINARY_DIR}/san_bl.txt
+        "src:${Boost_INCLUDE_DIRS}/*"
+    )
+    target_compile_options(
+        opts
+        INTERFACE # ignore boost headers for sanitizing
+            -fsanitize-blacklist=${CMAKE_CURRENT_BINARY_DIR}/san_bl.txt
+    )
 endif()

cmake/isolate_headers.cmake

@@ -38,11 +38,11 @@ include(create_symbolic_link)
 #
 # isolate_headers(target A B scope)
 function(isolate_headers target A B scope)
-  file(RELATIVE_PATH C "${A}" "${B}")
-  set(X "${CMAKE_CURRENT_BINARY_DIR}/modules/${target}")
-  set(Y "${X}/${C}")
-  cmake_path(GET Y PARENT_PATH parent)
-  file(MAKE_DIRECTORY "${parent}")
-  create_symbolic_link("${B}" "${Y}")
-  target_include_directories(${target} ${scope} "$<BUILD_INTERFACE:${X}>")
+    file(RELATIVE_PATH C "${A}" "${B}")
+    set(X "${CMAKE_CURRENT_BINARY_DIR}/modules/${target}")
+    set(Y "${X}/${C}")
+    cmake_path(GET Y PARENT_PATH parent)
+    file(MAKE_DIRECTORY "${parent}")
+    create_symbolic_link("${B}" "${Y}")
+    target_include_directories(${target} ${scope} "$<BUILD_INTERFACE:${X}>")
 endfunction()

cmake/target_link_modules.cmake

@@ -7,18 +7,21 @@
 # add_library(project.libparent)
 # target_link_modules(parent PUBLIC a b)
 function(target_link_modules parent scope)
-  set(library ${PROJECT_NAME}.lib${parent})
-  foreach(name ${ARGN})
-    set(module ${library}.${name})
-    get_target_property(sources ${library} SOURCES)
-    list(LENGTH sources before)
-    get_target_property(dupes ${module} SOURCES)
-    list(LENGTH dupes expected)
-    list(REMOVE_ITEM sources ${dupes})
-    list(LENGTH sources after)
-    math(EXPR actual "${before} - ${after}")
-    message(STATUS "${module} with ${expected} sources took ${actual} sources from ${library}")
-    set_target_properties(${library} PROPERTIES SOURCES "${sources}")
-    target_link_libraries(${library} ${scope} ${module})
-  endforeach()
+    set(library ${PROJECT_NAME}.lib${parent})
+    foreach(name ${ARGN})
+        set(module ${library}.${name})
+        get_target_property(sources ${library} SOURCES)
+        list(LENGTH sources before)
+        get_target_property(dupes ${module} SOURCES)
+        list(LENGTH dupes expected)
+        list(REMOVE_ITEM sources ${dupes})
+        list(LENGTH sources after)
+        math(EXPR actual "${before} - ${after}")
+        message(
+            STATUS
+            "${module} with ${expected} sources took ${actual} sources from ${library}"
+        )
+        set_target_properties(${library} PROPERTIES SOURCES "${sources}")
+        target_link_libraries(${library} ${scope} ${module})
+    endforeach()
 endfunction()

cmake/target_protobuf_sources.cmake

@@ -36,27 +36,30 @@ find_package(Protobuf REQUIRED)
 # ARGN:
 #     A list of .proto files.
 function(target_protobuf_sources target prefix)
-  set(dir "${CMAKE_CURRENT_BINARY_DIR}/pb-${target}")
-  file(MAKE_DIRECTORY "${dir}/${prefix}")
+    set(dir "${CMAKE_CURRENT_BINARY_DIR}/pb-${target}")
+    file(MAKE_DIRECTORY "${dir}/${prefix}")
 
-  protobuf_generate(
-    TARGET ${target}
-    PROTOC_OUT_DIR "${dir}/${prefix}"
-    "${ARGN}"
-  )
-  target_include_directories(${target} SYSTEM PUBLIC
-    # Allows #include <package/path/to/file.proto> used by consumer files.
-    $<BUILD_INTERFACE:${dir}>
-    # Allows #include "path/to/file.proto" used by generated files.
-    $<BUILD_INTERFACE:${dir}/${prefix}>
-    # Allows #include <package/path/to/file.proto> used by consumer files.
-    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
-    # Allows #include "path/to/file.proto" used by generated files.
-    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/${prefix}>
-  )
-  install(
-    DIRECTORY ${dir}/
-    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-    FILES_MATCHING PATTERN "*.h"
-  )
+    protobuf_generate(
+        TARGET ${target}
+        PROTOC_OUT_DIR "${dir}/${prefix}"
+        "${ARGN}"
+    )
+    target_include_directories(
+        ${target}
+        SYSTEM
+        PUBLIC # Allows #include <package/path/to/file.proto> used by consumer files.
+            $<BUILD_INTERFACE:${dir}>
+            # Allows #include "path/to/file.proto" used by generated files.
+            $<BUILD_INTERFACE:${dir}/${prefix}>
+            # Allows #include <package/path/to/file.proto> used by consumer files.
+            $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+            # Allows #include "path/to/file.proto" used by generated files.
+            $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/${prefix}>
+    )
+    install(
+        DIRECTORY ${dir}/
+        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+        FILES_MATCHING
+        PATTERN "*.h"
+    )
 endfunction()

conan.lock

@@ -6,14 +6,17 @@
         "sqlite3/3.49.1#8631739a4c9b93bd3d6b753bac548a63%1765850149.926",
         "soci/4.0.3#a9f8d773cd33e356b5879a4b0564f287%1765850149.46",
         "snappy/1.1.10#968fef506ff261592ec30c574d4a7809%1765850147.878",
-        "secp256k1/0.7.0#9c4ab67bdc3860c16ea5b36aed8f74ea%1765850147.928",
+        "secp256k1/0.7.1#3a61e95e220062ef32c48d019e9c81f7%1770306721.686",
         "rocksdb/10.5.1#4a197eca381a3e5ae8adf8cffa5aacd0%1765850186.86",
         "re2/20230301#ca3b241baec15bd31ea9187150e0b333%1765850148.103",
         "protobuf/6.32.1#f481fd276fc23a33b85a3ed1e898b693%1765850161.038",
-        "openssl/3.5.4#1b986e61b38fdfda3b40bebc1b234393%1768312656.257",
-        "nudb/2.0.9#fb8dfd1a5557f5e0528114c2da17721e%1765850143.957",
+        "opentelemetry-cpp/1.18.0#efd9851e173f8a13b9c7d35232de8cf1%1750409186.472",
+        "openssl/3.5.5#05a4ac5b7323f7a329b2db1391d9941f%1770229825.601",
+        "nudb/2.0.9#0432758a24204da08fee953ec9ea03cb%1769436073.32",
+        "nlohmann_json/3.11.3#45828be26eb619a2e04ca517bb7b828d%1701220705.259",
         "lz4/1.10.0#59fc63cac7f10fbe8e05c7e62c2f3504%1765850143.914",
         "libiconv/1.17#1e65319e945f2d31941a9d28cc13c058%1765842973.492",
+        "libcurl/8.18.0#364bc3755cb9ef84ed9a7ae9c7efc1c1%1770984390.024",
         "libbacktrace/cci.20210118#a7691bfccd8caaf66309df196790a5a1%1765842973.03",
         "libarchive/3.8.1#ffee18995c706e02bf96e7a2f7042e0d%1765850144.736",
         "jemalloc/5.3.0#e951da9cf599e956cebc117880d2d9f8%1729241615.244",
@@ -23,16 +26,22 @@
         "date/3.0.4#862e11e80030356b53c2c38599ceb32b%1765850143.772",
         "c-ares/1.34.5#5581c2b62a608b40bb85d965ab3ec7c8%1765850144.336",
         "bzip2/1.0.8#c470882369c2d95c5c77e970c0c7e321%1765850143.837",
-        "boost/1.88.0#8852c0b72ce8271fb8ff7c53456d4983%1765850172.862",
+        "boost/1.90.0#d5e8defe7355494953be18524a7f135b%1769454080.269",
         "abseil/20250127.0#99262a368bd01c0ccca8790dfced9719%1766517936.993"
     ],
     "build_requires": [
         "zlib/1.3.1#b8bc2603263cf7eccbd6e17e66b0ed76%1765850150.075",
         "strawberryperl/5.32.1.1#707032463aa0620fa17ec0d887f5fe41%1765850165.196",
         "protobuf/6.32.1#f481fd276fc23a33b85a3ed1e898b693%1765850161.038",
+        "pkgconf/2.5.1#93c2051284cba1279494a43a4fcfeae2%1757684701.089",
+        "opentelemetry-proto/1.4.0#4096a3b05916675ef9628f3ffd571f51%1732731336.11",
+        "ninja/1.13.2#c8c5dc2a52ed6e4e42a66d75b4717ceb%1764096931.974",
         "nasm/2.16.01#31e26f2ee3c4346ecd347911bd126904%1765850144.707",
-        "msys2/cci.latest#1996656c3c98e5765b25b60ff5cf77b4%1764840888.758",
+        "msys2/cci.latest#eea83308ad7e9023f7318c60d5a9e6cb%1770199879.083",
+        "meson/1.10.0#60786758ea978964c24525de19603cf4%1768294926.103",
         "m4/1.4.19#70dc8bbb33e981d119d2acc0175cf381%1763158052.846",
+        "libtool/2.4.7#14e7739cc128bc1623d2ed318008e47e%1755679003.847",
+        "gnu-config/cci.20210814#466e9d4d7779e1c142443f7ea44b4284%1762363589.329",
         "cmake/4.2.0#ae0a44f44a1ef9ab68fd4b3e9a1f8671%1765850153.937",
         "cmake/3.31.10#313d16a1aa16bbdb2ca0792467214b76%1765850153.479",
         "b2/5.3.3#107c15377719889654eb9a162a673975%1765850144.355",
@@ -42,18 +51,22 @@
     ],
     "python_requires": [],
     "overrides": {
+        "boost/1.90.0#d5e8defe7355494953be18524a7f135b": [
+            null,
+            "boost/1.90.0"
+        ],
         "protobuf/5.27.0": [
             "protobuf/6.32.1"
         ],
         "lz4/1.9.4": [
             "lz4/1.10.0"
         ],
-        "boost/1.83.0": [
-            "boost/1.88.0"
-        ],
         "sqlite3/3.44.2": [
             "sqlite3/3.49.1"
         ],
+        "boost/1.83.0": [
+            "boost/1.90.0"
+        ],
         "lz4/[>=1.9.4 <2]": [
             "lz4/1.10.0#59fc63cac7f10fbe8e05c7e62c2f3504"
         ]

conanfile.py

@@ -22,6 +22,7 @@ class Xrpl(ConanFile):
         "rocksdb": [True, False],
         "shared": [True, False],
         "static": [True, False],
+        "telemetry": [True, False],
         "tests": [True, False],
         "unity": [True, False],
         "xrpld": [True, False],
@@ -32,8 +33,8 @@ class Xrpl(ConanFile):
         "grpc/1.72.0",
         "libarchive/3.8.1",
         "nudb/2.0.9",
-        "openssl/3.5.4",
-        "secp256k1/0.7.0",
+        "openssl/3.5.5",
+        "secp256k1/0.7.1",
         "soci/4.0.3",
         "zlib/1.3.1",
     ]
@@ -54,6 +55,7 @@ class Xrpl(ConanFile):
         "rocksdb": True,
         "shared": False,
         "static": True,
+        "telemetry": True,
         "tests": False,
         "unity": False,
         "xrpld": False,
@@ -131,7 +133,7 @@ class Xrpl(ConanFile):
         transitive_headers_opt = (
             {"transitive_headers": True} if conan_version.split(".")[0] == "2" else {}
         )
-        self.requires("boost/1.88.0", force=True, **transitive_headers_opt)
+        self.requires("boost/1.90.0", force=True, **transitive_headers_opt)
         self.requires("date/3.0.4", **transitive_headers_opt)
         self.requires("lz4/1.10.0", force=True)
         self.requires("protobuf/6.32.1", force=True)
@@ -140,6 +142,10 @@ class Xrpl(ConanFile):
             self.requires("jemalloc/5.3.0")
         if self.options.rocksdb:
             self.requires("rocksdb/10.5.1")
+        # OpenTelemetry C++ SDK for distributed tracing (optional).
+        # Provides OTLP/HTTP exporter, batch span processor, and trace API.
+        if self.options.telemetry:
+            self.requires("opentelemetry-cpp/1.18.0")
         self.requires("xxhash/0.8.3", **transitive_headers_opt)
 
     exports_sources = (
@@ -168,6 +174,7 @@ class Xrpl(ConanFile):
         tc.variables["rocksdb"] = self.options.rocksdb
         tc.variables["BUILD_SHARED_LIBS"] = self.options.shared
         tc.variables["static"] = self.options.static
+        tc.variables["telemetry"] = self.options.telemetry
         tc.variables["unity"] = self.options.unity
         tc.variables["xrpld"] = self.options.xrpld
         tc.generate()
@@ -203,7 +210,6 @@ class Xrpl(ConanFile):
             "boost::program_options",
             "boost::process",
             "boost::regex",
-            "boost::system",
             "boost::thread",
             "date::date",
             "ed25519::ed25519",
@@ -221,3 +227,5 @@ class Xrpl(ConanFile):
         ]
         if self.options.rocksdb:
             libxrpl.requires.append("rocksdb::librocksdb")
+        if self.options.telemetry:
+            libxrpl.requires.append("opentelemetry-cpp::opentelemetry-cpp")

cspell.config.yaml

@@ -1,14 +1,14 @@
 ignorePaths:
   - build/**
   - src/libxrpl/crypto
-  - src/test/** # Will be removed in the future
   - CMakeUserPresets.json
   - Doxyfile
   - docs/**/*.puml
   - cmake/**
   - LICENSE.md
+  - .clang-tidy
 language: en
-allowCompoundWords: true
+allowCompoundWords: true # TODO (#6334)
 ignoreRandomStrings: true
 minWordLength: 5
 dictionaries:
@@ -16,20 +16,29 @@ dictionaries:
   - en_US
   - en_GB
 ignoreRegExpList:
-  - /[rs][1-9A-HJ-NP-Za-km-z]{25,34}/g # addresses and seeds
-  - /(XRPL|BEAST)_[A-Z_0-9]+_H_INCLUDED+/g # include guards
-  - /(XRPL|BEAST)_[A-Z_0-9]+_H+/g # include guards
+  - /\b[rs][1-9A-HJ-NP-Za-km-z]{25,34}/g # addresses and seeds
+  - /\bC[A-Z0-9]{15}/g # CTIDs
+  - /\b(XRPL|BEAST)_[A-Z_0-9]+_H_INCLUDED+/g # include guards
+  - /\b(XRPL|BEAST)_[A-Z_0-9]+_H+/g # include guards
   - /::[a-z:_]+/g # things from other namespaces
-  - /lib[a-z]+/g # libraries
-  - /[0-9]{4}-[0-9]{2}-[0-9]{2}[,:][A-Za-zÀ-ÖØ-öø-ÿ.\s]+/g # copyright dates
-  - /[0-9]{4}[,:]?\s*[A-Za-zÀ-ÖØ-öø-ÿ.\s]+/g # copyright years
+  - /\blib[a-z]+/g # libraries
+  - /\b[0-9]{4}-[0-9]{2}-[0-9]{2}[,:][A-Za-zÀ-ÖØ-öø-ÿ.\s]+/g # copyright dates
+  - /\b[0-9]{4}[,:]?\s*[A-Za-zÀ-ÖØ-öø-ÿ.\s]+/g # copyright years
   - /\[[A-Za-z0-9-]+\]\(https:\/\/github.com\/[A-Za-z0-9-]+\)/g # Github usernames
   - /-[DWw][a-zA-Z0-9_-]+=/g # compile flags
   - /[\['"`]-[DWw][a-zA-Z0-9_-]+['"`\]]/g # compile flags
+  - ABCDEFGHIJKLMNOPQRSTUVWXYZ
+  - ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
+overrides:
+  - filename: "**/*_test.cpp" # all test files
+    ignoreRegExpList:
+      - /"[^"]*"/g # double-quoted strings
+      - /'[^']*'/g # single-quoted strings
+      - /`[^`]*`/g # backtick strings
 suggestWords:
   - xprl->xrpl
-  - xprld->xrpld
-  - unsynched->unsynced
+  - xprld->xrpld # cspell: disable-line not sure what this problem is....
+  - unsynched->unsynced # cspell: disable-line not sure what this problem is....
   - synched->synced
   - synch->sync
 words:
@@ -51,6 +60,7 @@ words:
   - Britto
   - Btrfs
   - canonicality
+  - changespq
   - checkme
   - choco
   - chrono
@@ -77,6 +87,8 @@ words:
   - daria
   - dcmake
   - dearmor
+  - Dedup
+  - dedup
   - deleteme
   - demultiplexer
   - deserializaton
@@ -87,6 +99,7 @@ words:
   - doxyfile
   - dxrpl
   - endmacro
+  - EOCFG
   - exceptioned
   - Falco
   - finalizers
@@ -101,19 +114,24 @@ words:
   - gpgcheck
   - gpgkey
   - hotwallet
+  - hwrap
   - ifndef
   - inequation
   - insuf
   - insuff
+  - invasively
   - iou
   - ious
   - isrdc
   - itype
   - jemalloc
   - jlog
+  - jtnofill
   - keylet
   - keylets
   - keyvadb
+  - kwarg
+  - kwargs
   - ledgerentry
   - ledgerhash
   - ledgerindex
@@ -125,6 +143,7 @@ words:
   - libxrpl
   - llection
   - LOCALGOOD
+  - logql
   - logwstream
   - lseq
   - lsmf
@@ -135,6 +154,7 @@ words:
   - Metafuncton
   - misprediction
   - mptbalance
+  - MPTDEX
   - mptflags
   - mptid
   - mptissuance
@@ -144,6 +164,7 @@ words:
   - mptokenissuance
   - mptokens
   - mpts
+  - mtgox
   - multisig
   - multisign
   - multisigned
@@ -156,20 +177,31 @@ words:
   - nftokens
   - nftpage
   - nikb
+  - nixfmt
+  - nixos
+  - nixpkgs
+  - NOLINT
+  - NOLINTNEXTLINE
   - nonxrp
   - noripple
+  - nostd
   - nudb
   - nullptr
   - nunl
   - Nyffenegger
   - ostr
+  - pargs
   - partitioner
   - paychan
   - paychans
   - permdex
   - perminute
   - permissioned
+  - pgrep
+  - pkill
   - pointee
+  - populator
+  - pratik
   - preauth
   - preauthorization
   - preauthorize
@@ -178,11 +210,14 @@ words:
   - protobuf
   - protos
   - ptrs
+  - pushd
   - pyenv
   - qalloc
   - queuable
   - Raphson
+  - reparent
   - replayer
+  - reqps
   - rerere
   - retriable
   - RIPD
@@ -277,6 +312,10 @@ words:
   - xchain
   - ximinez
   - EXPECT_STREQ
+  - Gantt
+  - gantt
+  - otelc
+  - traceql
   - XMACRO
   - xrpkuwait
   - xrpl
@@ -284,3 +323,5 @@ words:
   - xrplf
   - xxhash
   - xxhasher
+  - xychart
+  - zpages

docker/telemetry/TESTING.md

@@ -0,0 +1,703 @@
+# OpenTelemetry Integration Testing Guide
+
+This document describes how to verify the rippled OpenTelemetry telemetry
+pipeline end-to-end, from span generation through the observability stack
+(otel-collector, Jaeger, Prometheus, Grafana).
+
+---
+
+## Prerequisites
+
+### Build xrpld with telemetry
+
+```bash
+conan install . --build=missing -o telemetry=True
+cmake --preset default -Dtelemetry=ON
+cmake --build --preset default --target xrpld
+```
+
+The binary is at `.build/xrpld`.
+
+### Required tools
+
+- **Docker** with `docker compose` (v2)
+- **curl**
+- **jq** (JSON processor)
+
+### Verify binary
+
+```bash
+.build/xrpld --version
+```
+
+---
+
+## Test 1: Single-Node Standalone (Quick Verification)
+
+This test verifies RPC and transaction spans in standalone mode. Consensus
+spans will not fire because standalone mode does not run consensus.
+
+### Step 1: Start the observability stack
+
+```bash
+docker compose -f docker/telemetry/docker-compose.yml up -d
+```
+
+Wait for services to be ready:
+
+```bash
+# otel-collector health
+curl -sf http://localhost:13133/ && echo "collector ready"
+
+# Jaeger UI
+curl -sf http://localhost:16686/ > /dev/null && echo "jaeger ready"
+```
+
+### Step 2: Start xrpld in standalone mode
+
+```bash
+.build/xrpld --conf docker/telemetry/xrpld-telemetry.cfg -a --start
+```
+
+Wait a few seconds for the node to initialize.
+
+### Step 3: Exercise RPC spans
+
+```bash
+# server_info
+curl -s http://localhost:5005 \
+  -d '{"method":"server_info"}' | jq .result.info.server_state
+
+# server_state
+curl -s http://localhost:5005 \
+  -d '{"method":"server_state"}' | jq .result.state.server_state
+
+# ledger
+curl -s http://localhost:5005 \
+  -d '{"method":"ledger","params":[{"ledger_index":"current"}]}' \
+  | jq .result.ledger_current_index
+```
+
+### Step 4: Submit a transaction
+
+Close the ledger first (required in standalone mode):
+
+```bash
+curl -s http://localhost:5005 -d '{"method":"ledger_accept"}'
+```
+
+Submit a Payment from the genesis account:
+
+```bash
+curl -s http://localhost:5005 -d '{
+  "method": "submit",
+  "params": [{
+    "secret": "snoPBrXtMeMyMHUVTgbuqAfg1SUTb",
+    "tx_json": {
+      "TransactionType": "Payment",
+      "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
+      "Destination": "rPMh7Pi9ct699iZUTWzJaUMR1o42VEfGqF",
+      "Amount": "10000000"
+    }
+  }]
+}' | jq .result.engine_result
+```
+
+Expected result: `"tesSUCCESS"`.
+
+Close the ledger again to finalize:
+
+```bash
+curl -s http://localhost:5005 -d '{"method":"ledger_accept"}'
+```
+
+### Step 5: Verify traces in Jaeger
+
+Wait 5 seconds for the batch export, then:
+
+```bash
+JAEGER="http://localhost:16686"
+
+# Check rippled service is registered
+curl -s "$JAEGER/api/services" | jq '.data'
+
+# Check RPC spans
+curl -s "$JAEGER/api/traces?service=rippled&operation=rpc.request&limit=5&lookback=1h" \
+  | jq '.data | length'
+
+curl -s "$JAEGER/api/traces?service=rippled&operation=rpc.process&limit=5&lookback=1h" \
+  | jq '.data | length'
+
+curl -s "$JAEGER/api/traces?service=rippled&operation=rpc.command.server_info&limit=5&lookback=1h" \
+  | jq '.data | length'
+
+# Check transaction spans
+curl -s "$JAEGER/api/traces?service=rippled&operation=tx.process&limit=5&lookback=1h" \
+  | jq '.data | length'
+```
+
+Or open the Jaeger UI: http://localhost:16686
+
+### Step 6: Teardown
+
+```bash
+# Kill xrpld (Ctrl+C or)
+kill $(pgrep -f 'xrpld.*xrpld-telemetry')
+
+# Stop observability stack
+docker compose -f docker/telemetry/docker-compose.yml down
+
+# Clean xrpld data
+rm -rf data/
+```
+
+### Expected spans (standalone mode)
+
+| Span Name                   | Expected | Notes                         |
+| --------------------------- | -------- | ----------------------------- |
+| `rpc.request`               | Yes      | Every HTTP RPC call           |
+| `rpc.process`               | Yes      | Every RPC processing          |
+| `rpc.command.server_info`   | Yes      | server_info RPC               |
+| `rpc.command.server_state`  | Yes      | server_state RPC              |
+| `rpc.command.ledger`        | Yes      | ledger RPC                    |
+| `rpc.command.submit`        | Yes      | submit RPC                    |
+| `rpc.command.ledger_accept` | Yes      | ledger_accept RPC             |
+| `tx.process`                | Yes      | Transaction submission        |
+| `tx.receive`                | No       | No peers in standalone        |
+| `consensus.*`               | No       | Consensus disabled standalone |
+
+---
+
+## Test 2: 6-Node Consensus Network (Full Verification)
+
+This test verifies ALL span categories including consensus and peer
+transaction relay, using a 6-node validator network.
+
+### Automated
+
+Run the integration test script:
+
+```bash
+bash docker/telemetry/integration-test.sh
+```
+
+The script will:
+
+1. Start the observability stack
+2. Generate 6 validator key pairs
+3. Create config files for each node
+4. Start all 6 nodes
+5. Wait for consensus ("proposing" state)
+6. Exercise RPC, submit transactions
+7. Verify all span categories in Jaeger
+8. Verify spanmetrics in Prometheus
+9. Print results and leave the stack running
+
+### Manual
+
+If you prefer to run the steps manually:
+
+#### Step 1: Start observability stack
+
+```bash
+docker compose -f docker/telemetry/docker-compose.yml up -d
+```
+
+#### Step 2: Generate validator keys
+
+Start a temporary standalone xrpld:
+
+```bash
+.build/xrpld --conf docker/telemetry/xrpld-telemetry.cfg -a --start &
+TEMP_PID=$!
+sleep 5
+```
+
+Generate 6 key pairs:
+
+```bash
+for i in $(seq 1 6); do
+  curl -s http://localhost:5005 \
+    -d '{"method":"validation_create"}' | jq '.result'
+done
+```
+
+Record the `validation_seed` and `validation_public_key` for each.
+Kill the temporary node:
+
+```bash
+kill $TEMP_PID
+rm -rf data/
+```
+
+#### Step 3: Create node configs
+
+For each node (1-6), create a config file. Template:
+
+```ini
+[server]
+port_rpc
+port_peer
+
+[port_rpc]
+port = {5004 + node_number}
+ip = 127.0.0.1
+admin = 127.0.0.1
+protocol = http
+
+[port_peer]
+port = {51234 + node_number}
+ip = 0.0.0.0
+protocol = peer
+
+[node_db]
+type=NuDB
+path=/tmp/xrpld-integration/node{N}/nudb
+online_delete=256
+
+[database_path]
+/tmp/xrpld-integration/node{N}/db
+
+[debug_logfile]
+/tmp/xrpld-integration/node{N}/debug.log
+
+[validation_seed]
+{seed from step 2}
+
+[validators_file]
+/tmp/xrpld-integration/validators.txt
+
+[ips_fixed]
+127.0.0.1 51235
+127.0.0.1 51236
+127.0.0.1 51237
+127.0.0.1 51238
+127.0.0.1 51239
+127.0.0.1 51240
+
+[peer_private]
+1
+
+[telemetry]
+enabled=1
+endpoint=http://localhost:4318/v1/traces
+exporter=otlp_http
+sampling_ratio=1.0
+batch_size=512
+batch_delay_ms=2000
+max_queue_size=2048
+trace_rpc=1
+trace_transactions=1
+trace_consensus=1
+trace_peer=0
+trace_ledger=1
+
+[rpc_startup]
+{ "command": "log_level", "severity": "warning" }
+
+[ssl_verify]
+0
+```
+
+#### Step 4: Create validators.txt
+
+```ini
+[validators]
+{public_key_1}
+{public_key_2}
+{public_key_3}
+{public_key_4}
+{public_key_5}
+{public_key_6}
+```
+
+#### Step 5: Start all 6 nodes
+
+```bash
+for i in $(seq 1 6); do
+  .build/xrpld --conf /tmp/xrpld-integration/node$i/xrpld.cfg --start &
+  echo $! > /tmp/xrpld-integration/node$i/xrpld.pid
+done
+```
+
+#### Step 6: Wait for consensus
+
+Poll each node until `server_state` = `"proposing"`:
+
+```bash
+for port in 5005 5006 5007 5008 5009 5010; do
+  while true; do
+    state=$(curl -s http://localhost:$port \
+      -d '{"method":"server_info"}' \
+      | jq -r '.result.info.server_state')
+    echo "Port $port: $state"
+    [ "$state" = "proposing" ] && break
+    sleep 5
+  done
+done
+```
+
+#### Step 7: Exercise RPC and submit transaction
+
+```bash
+# RPC calls
+curl -s http://localhost:5005 -d '{"method":"server_info"}'
+curl -s http://localhost:5005 -d '{"method":"server_state"}'
+curl -s http://localhost:5005 -d '{"method":"ledger","params":[{"ledger_index":"current"}]}'
+
+# Submit transaction
+curl -s http://localhost:5005 -d '{
+  "method": "submit",
+  "params": [{
+    "secret": "snoPBrXtMeMyMHUVTgbuqAfg1SUTb",
+    "tx_json": {
+      "TransactionType": "Payment",
+      "Account": "rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh",
+      "Destination": "rPMh7Pi9ct699iZUTWzJaUMR1o42VEfGqF",
+      "Amount": "10000000"
+    }
+  }]
+}'
+```
+
+Wait 15 seconds for consensus and batch export.
+
+#### Step 8: Verify in Jaeger
+
+See the "Verification Queries" section below.
+
+---
+
+## Expected Span Catalog
+
+All 16 production span names instrumented across Phases 2-5:
+
+| Span Name                   | Source File           | Phase | Key Attributes                                                                    | How to Trigger            |
+| --------------------------- | --------------------- | ----- | --------------------------------------------------------------------------------- | ------------------------- |
+| `rpc.request`               | ServerHandler.cpp:271 | 2     | --                                                                                | Any HTTP RPC call         |
+| `rpc.process`               | ServerHandler.cpp:573 | 2     | --                                                                                | Any HTTP RPC call         |
+| `rpc.ws_message`            | ServerHandler.cpp:384 | 2     | --                                                                                | WebSocket RPC message     |
+| `rpc.command.<name>`        | RPCHandler.cpp:161    | 2     | `xrpl.rpc.command`, `xrpl.rpc.version`, `xrpl.rpc.role`                           | Any RPC command           |
+| `tx.process`                | NetworkOPs.cpp:1227   | 3     | `xrpl.tx.hash`, `xrpl.tx.local`, `xrpl.tx.path`                                   | Submit transaction        |
+| `tx.receive`                | PeerImp.cpp:1273      | 3     | `xrpl.peer.id`                                                                    | Peer relays transaction   |
+| `consensus.proposal.send`   | RCLConsensus.cpp:177  | 4     | `xrpl.consensus.round`                                                            | Consensus proposing phase |
+| `consensus.ledger_close`    | RCLConsensus.cpp:282  | 4     | `xrpl.consensus.ledger.seq`, `xrpl.consensus.mode`                                | Ledger close event        |
+| `consensus.accept`          | RCLConsensus.cpp:395  | 4     | `xrpl.consensus.proposers`, `xrpl.consensus.round_time_ms`                        | Ledger accepted           |
+| `consensus.validation.send` | RCLConsensus.cpp:753  | 4     | `xrpl.consensus.ledger.seq`, `xrpl.consensus.proposing`                           | Validation sent           |
+| `consensus.accept.apply`    | RCLConsensus.cpp:453  | 4     | `xrpl.consensus.close_time`, `close_time_correct`, `close_resolution_ms`, `state` | Ledger apply + close time |
+| `tx.apply`                  | BuildLedger.cpp:88    | 5     | `xrpl.ledger.tx_count`, `xrpl.ledger.tx_failed`                                   | Ledger close (tx set)     |
+| `ledger.build`              | BuildLedger.cpp:31    | 5     | `xrpl.ledger.seq`                                                                 | Ledger build              |
+| `ledger.validate`           | LedgerMaster.cpp:915  | 5     | `xrpl.ledger.seq`, `xrpl.ledger.validations`                                      | Ledger validated          |
+| `ledger.store`              | LedgerMaster.cpp:409  | 5     | `xrpl.ledger.seq`                                                                 | Ledger stored             |
+| `peer.proposal.receive`     | PeerImp.cpp:1667      | 5     | `xrpl.peer.id`, `xrpl.peer.proposal.trusted`                                      | Peer sends proposal       |
+| `peer.validation.receive`   | PeerImp.cpp:2264      | 5     | `xrpl.peer.id`, `xrpl.peer.validation.trusted`                                    | Peer sends validation     |
+
+---
+
+## Verification Queries
+
+### Jaeger API
+
+Base URL: `http://localhost:16686`
+
+```bash
+JAEGER="http://localhost:16686"
+
+# List all services
+curl -s "$JAEGER/api/services" | jq '.data'
+
+# List operations for rippled
+curl -s "$JAEGER/api/services/rippled/operations" | jq '.data'
+
+# Query traces by operation
+for op in "rpc.request" "rpc.process" \
+          "rpc.command.server_info" "rpc.command.server_state" "rpc.command.ledger" \
+          "tx.process" "tx.receive" "tx.apply" \
+          "consensus.proposal.send" "consensus.ledger_close" \
+          "consensus.accept" "consensus.accept.apply" \
+          "consensus.validation.send" \
+          "ledger.build" "ledger.validate" "ledger.store" \
+          "peer.proposal.receive" "peer.validation.receive"; do
+  count=$(curl -s "$JAEGER/api/traces?service=rippled&operation=$op&limit=5&lookback=1h" \
+    | jq '.data | length')
+  printf "%-35s %s traces\n" "$op" "$count"
+done
+```
+
+### Prometheus API
+
+Base URL: `http://localhost:9090`
+
+```bash
+PROM="http://localhost:9090"
+
+# Span call counts (from spanmetrics connector)
+curl -s "$PROM/api/v1/query?query=traces_span_metrics_calls_total" \
+  | jq '.data.result[] | {span: .metric.span_name, count: .value[1]}'
+
+# Latency histogram
+curl -s "$PROM/api/v1/query?query=traces_span_metrics_duration_milliseconds_count" \
+  | jq '.data.result[] | {span: .metric.span_name, count: .value[1]}'
+
+# RPC calls by command
+curl -s "$PROM/api/v1/query?query=traces_span_metrics_calls_total{span_name=~\"rpc.command.*\"}" \
+  | jq '.data.result[] | {command: .metric["xrpl.rpc.command"], count: .value[1]}'
+```
+
+### System Metrics (beast::insight via OTel native)
+
+rippled's built-in `beast::insight` framework exports metrics natively via OTLP/HTTP to the OTel Collector
+on port 4318 (same endpoint as traces). These appear in Prometheus alongside spanmetrics.
+
+Requires `[insight]` config in `xrpld.cfg`:
+
+```ini
+[insight]
+server=otel
+endpoint=http://localhost:4318/v1/metrics
+prefix=rippled
+```
+
+Verify system metrics in Prometheus:
+
+```bash
+# Ledger age gauge
+curl -s "$PROM/api/v1/query?query=rippled_LedgerMaster_Validated_Ledger_Age" | jq '.data.result'
+
+# Peer counts
+curl -s "$PROM/api/v1/query?query=rippled_Peer_Finder_Active_Inbound_Peers" | jq '.data.result'
+
+# RPC request counter
+curl -s "$PROM/api/v1/query?query=rippled_rpc_requests" | jq '.data.result'
+
+# State accounting
+curl -s "$PROM/api/v1/query?query=rippled_State_Accounting_Full_duration" | jq '.data.result'
+
+# Overlay traffic
+curl -s "$PROM/api/v1/query?query=rippled_total_Bytes_In" | jq '.data.result'
+```
+
+Key system metrics (prefix `rippled_`):
+
+| Metric                                | Type      | Source                                    |
+| ------------------------------------- | --------- | ----------------------------------------- |
+| `LedgerMaster_Validated_Ledger_Age`   | gauge     | LedgerMaster.h:373                        |
+| `LedgerMaster_Published_Ledger_Age`   | gauge     | LedgerMaster.h:374                        |
+| `State_Accounting_{Mode}_duration`    | gauge     | NetworkOPs.cpp:774                        |
+| `State_Accounting_{Mode}_transitions` | gauge     | NetworkOPs.cpp:780                        |
+| `Peer_Finder_Active_Inbound_Peers`    | gauge     | PeerfinderManager.cpp:214                 |
+| `Peer_Finder_Active_Outbound_Peers`   | gauge     | PeerfinderManager.cpp:215                 |
+| `Overlay_Peer_Disconnects`            | gauge     | OverlayImpl.h:557                         |
+| `job_count`                           | gauge     | JobQueue.cpp:26                           |
+| `rpc_requests`                        | counter   | ServerHandler.cpp:108                     |
+| `rpc_time`                            | histogram | ServerHandler.cpp:110                     |
+| `rpc_size`                            | histogram | ServerHandler.cpp:109                     |
+| `ios_latency`                         | histogram | Application.cpp:438                       |
+| `pathfind_fast`                       | histogram | PathRequests.h:23                         |
+| `pathfind_full`                       | histogram | PathRequests.h:24                         |
+| `ledger_fetches`                      | counter   | InboundLedgers.cpp:44                     |
+| `ledger_history_mismatch`             | counter   | LedgerHistory.cpp:16                      |
+| `warn`                                | counter   | Logic.h:33                                |
+| `drop`                                | counter   | Logic.h:34                                |
+| `{category}_Bytes_In/Out`             | gauge     | OverlayImpl.h:535 (57 traffic categories) |
+| `{category}_Messages_In/Out`          | gauge     | OverlayImpl.h:535 (57 traffic categories) |
+
+### Grafana
+
+Open http://localhost:3000 (anonymous admin access enabled).
+
+Pre-configured dashboards (span-derived):
+
+- **RPC Performance**: Request rates, latency percentiles by command, top commands, WebSocket rate
+- **Transaction Overview**: Transaction processing rates, apply duration, peer relay, failed tx rate
+- **Consensus Health**: Consensus round duration, proposer counts, mode tracking, accept heatmap
+- **Ledger Operations**: Build/validate/store rates and durations, TX apply metrics
+- **Peer Network**: Proposal/validation receive rates, trusted vs untrusted breakdown (requires `trace_peer=1`)
+
+Pre-configured dashboards (system metrics):
+
+- **Node Health (System Metrics)**: Validated/published ledger age, operating mode, I/O latency, job queue
+- **Network Traffic (System Metrics)**: Peer counts, disconnects, overlay traffic by category
+- **RPC & Pathfinding (System Metrics)**: RPC request rate/time/size, pathfinding duration, resource warnings
+
+Pre-configured datasources:
+
+- **Jaeger**: Trace data at `http://jaeger:16686`
+- **Tempo**: Trace data at `http://tempo:3200` (via Grafana Explore)
+- **Prometheus**: Metrics at `http://prometheus:9090`
+- **Loki**: Log data at `http://loki:3100` (via Grafana Explore)
+
+---
+
+## Test 3: Log-Trace Correlation (Phase 8)
+
+Phase 8 injects `trace_id` and `span_id` into rippled's log output when
+a log line is emitted within an active OTel span. This test verifies the
+end-to-end log-trace correlation pipeline.
+
+### Step 1: Verify trace_id in log output
+
+After running Test 1 or Test 2 (which generate RPC spans), check the
+rippled debug.log for trace context:
+
+```bash
+grep 'trace_id=[a-f0-9]\{32\} span_id=[a-f0-9]\{16\}' /path/to/debug.log
+```
+
+Expected: log lines with `trace_id=<32hex> span_id=<16hex>` between the
+severity code and the message. Example:
+
+```
+2024-01-15T10:30:45.123Z RPCHandler:NFO trace_id=abc123def456789012345678abcdef01 span_id=0123456789abcdef Calling server_info
+```
+
+Lines emitted outside of an active span (background tasks, startup) will
+NOT have trace context — this is expected.
+
+### Step 2: Cross-check trace_id in Jaeger
+
+Extract a `trace_id` from the log and verify it exists in Jaeger:
+
+```bash
+TRACE_ID=$(grep -o 'trace_id=[a-f0-9]\{32\}' /path/to/debug.log | head -1 | cut -d= -f2)
+echo "Checking trace: $TRACE_ID"
+curl -s "http://localhost:16686/api/traces/$TRACE_ID" | jq '.data | length'
+```
+
+Expected result: `1` (the trace exists in Jaeger).
+
+### Step 3: Verify Loki log ingestion
+
+The OTel Collector's filelog receiver tails rippled's debug.log and
+exports parsed entries to Loki. Verify Loki has received entries:
+
+```bash
+# Query Loki for any rippled logs
+curl -sG "http://localhost:3100/loki/api/v1/query" \
+  --data-urlencode 'query={job="rippled"}' \
+  --data-urlencode 'limit=5' | jq '.data.result | length'
+```
+
+Expected: > 0 results.
+
+### Step 4: Verify Grafana Tempo-to-Loki correlation
+
+1. Open Grafana at http://localhost:3000
+2. Navigate to **Explore** -> select **Tempo** datasource
+3. Search for a trace (e.g., operation `rpc.command.server_info`)
+4. Click **"Logs for this trace"** in the trace detail view
+5. Verify that Loki log lines appear, filtered by the trace's `trace_id`
+
+### Step 5: Verify Grafana Loki-to-Tempo correlation
+
+1. In Grafana **Explore**, select **Loki** datasource
+2. Query: `{job="rippled"} |= "trace_id="`
+3. In the log results, click the **TraceID** derived field link
+4. Verify it navigates to the full trace in Tempo
+
+### Expected results
+
+| Check                          | Expected                                 |
+| ------------------------------ | ---------------------------------------- |
+| `trace_id=` in debug.log       | Present in log lines within active spans |
+| `span_id=` in debug.log        | Present alongside trace_id               |
+| Logs without active span       | No trace_id/span_id fields               |
+| trace_id in Jaeger             | Matches a valid trace                    |
+| Loki log ingestion             | Logs visible via LogQL                   |
+| Tempo -> Loki "Logs for trace" | Shows correlated log lines               |
+| Loki -> Tempo TraceID link     | Navigates to correct trace               |
+
+---
+
+## Troubleshooting
+
+### No traces in Jaeger
+
+1. Check otel-collector logs:
+   ```bash
+   docker compose -f docker/telemetry/docker-compose.yml logs otel-collector
+   ```
+2. Verify xrpld telemetry config has `enabled=1` and correct endpoint
+3. Check that otel-collector port 4318 is accessible:
+   ```bash
+   curl -sf http://localhost:4318 && echo "reachable"
+   ```
+4. Increase `batch_delay_ms` or decrease `batch_size` in xrpld config
+
+### Nodes not reaching "proposing" state
+
+1. Check that all peer ports (51235-51240) are not in use:
+   ```bash
+   for p in 51235 51236 51237 51238 51239 51240; do
+     ss -tlnp | grep ":$p " && echo "port $p in use"
+   done
+   ```
+2. Verify `[ips_fixed]` lists all 6 peer ports
+3. Verify `validators.txt` has all 6 public keys
+4. Check node debug logs: `tail -50 /tmp/xrpld-integration/node1/debug.log`
+5. Ensure `[peer_private]` is set to `1` (prevents reaching out to public network)
+
+### Transaction not processing
+
+1. Verify genesis account exists:
+   ```bash
+   curl -s http://localhost:5005 \
+     -d '{"method":"account_info","params":[{"account":"rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh"}]}' \
+     | jq .result.account_data.Balance
+   ```
+2. Check submit response for error codes
+3. In standalone mode, remember to call `ledger_accept` after submitting
+
+### No trace_id in log output (Phase 8)
+
+1. Verify rippled was built with `telemetry=ON` (`-Dtelemetry=ON` in CMake)
+2. Verify `enabled=1` in the `[telemetry]` config section
+3. Log lines only contain trace context when emitted inside an active span.
+   Background logs (startup, periodic tasks outside spans) will not have
+   `trace_id`/`span_id`.
+4. Ensure the trace category is enabled (e.g., `trace_rpc=1` for RPC logs)
+
+### No logs in Loki (Phase 8)
+
+1. Verify the log file mount in docker-compose.yml:
+   ```yaml
+   volumes:
+     - /tmp/xrpld-integration:/var/log/rippled:ro
+   ```
+2. Check OTel Collector logs for filelog receiver errors:
+   ```bash
+   docker compose -f docker/telemetry/docker-compose.yml logs otel-collector | grep -i "filelog\|loki\|error"
+   ```
+3. Verify Loki is running:
+   ```bash
+   curl -s http://localhost:3100/ready
+   ```
+4. Verify the filelog receiver glob pattern matches your log files:
+   The default pattern is `/var/log/rippled/*/debug.log`
+
+### Grafana trace-log links not working (Phase 8)
+
+1. Verify `tracesToLogs` is configured in the Tempo datasource provisioning
+   (`docker/telemetry/grafana/provisioning/datasources/tempo.yaml`)
+2. Verify `derivedFields` is configured in the Loki datasource provisioning
+   (`docker/telemetry/grafana/provisioning/datasources/loki.yaml`)
+3. Restart Grafana after changing provisioning files:
+   ```bash
+   docker compose -f docker/telemetry/docker-compose.yml restart grafana
+   ```
+
+### Spanmetrics not appearing in Prometheus
+
+1. Verify otel-collector config has `spanmetrics` connector
+2. Check that the metrics pipeline is configured:
+   ```yaml
+   service:
+     pipelines:
+       metrics:
+         receivers: [otlp, spanmetrics]
+         exporters: [prometheus]
+   ```
+3. Verify Prometheus can reach collector:
+   ```bash
+   curl -s http://localhost:9090/api/v1/targets | jq '.data.activeTargets'
+   ```

docker/telemetry/docker-compose.workload.yaml

@@ -0,0 +1,115 @@
+# Docker Compose workload harness for Phase 10 telemetry validation.
+#
+# Runs a 5-node validator cluster with full OTel telemetry stack:
+#   - 5 rippled validator nodes (consensus network)
+#   - OTel Collector (traces + StatsD metrics)
+#   - Jaeger (trace search UI)
+#   - Tempo (production trace backend)
+#   - Prometheus (metrics)
+#   - Loki (log aggregation for log-trace correlation)
+#   - Grafana (dashboards + trace/log exploration)
+#
+# Usage:
+#   # Start the harness (requires pre-built xrpld image or mount binary):
+#   docker compose -f docker/telemetry/docker-compose.workload.yaml up -d
+#
+#   # Or use the orchestrator:
+#   docker/telemetry/workload/run-full-validation.sh
+#
+# Prerequisites:
+#   - xrpld binary built with -DXRPL_ENABLE_TELEMETRY=ON
+#   - Validator keys generated via generate-validator-keys.sh
+#   - Node configs generated by run-full-validation.sh
+#
+# Note: No Docker healthchecks are defined here. The orchestrator script
+# (run-full-validation.sh) polls each service endpoint directly from the
+# host, which avoids issues with missing curl/wget in container images.
+
+services:
+  # ---------------------------------------------------------------------------
+  # Telemetry Backend Stack
+  # ---------------------------------------------------------------------------
+
+  otel-collector:
+    image: otel/opentelemetry-collector-contrib:latest
+    command: ["--config=/etc/otel-collector-config.yaml"]
+    ports:
+      - "4317:4317" # OTLP gRPC
+      - "4318:4318" # OTLP HTTP
+      - "8125:8125/udp" # StatsD UDP (beast::insight metrics)
+      - "8889:8889" # Prometheus metrics endpoint
+      - "13133:13133" # Health check
+    volumes:
+      - ./otel-collector-config.yaml:/etc/otel-collector-config.yaml:ro
+      # Mount the validation workdir so filelog receiver can tail node logs.
+      - /tmp/xrpld-validation:/var/log/rippled:ro
+    depends_on:
+      - jaeger
+      - tempo
+    networks:
+      - workload-net
+
+  jaeger:
+    image: jaegertracing/all-in-one:latest
+    environment:
+      - COLLECTOR_OTLP_ENABLED=true
+    ports:
+      - "16686:16686" # Jaeger UI
+      - "14250:14250" # gRPC
+    networks:
+      - workload-net
+
+  tempo:
+    image: grafana/tempo:2.7.2
+    command: ["-config.file=/etc/tempo.yaml"]
+    ports:
+      - "3200:3200" # Tempo HTTP API
+    volumes:
+      - ./tempo.yaml:/etc/tempo.yaml:ro
+      - tempo-data:/var/tempo
+    networks:
+      - workload-net
+
+  prometheus:
+    image: prom/prometheus:latest
+    ports:
+      - "9090:9090"
+    volumes:
+      - ./prometheus.yml:/etc/prometheus/prometheus.yml:ro
+    depends_on:
+      - otel-collector
+    networks:
+      - workload-net
+
+  loki:
+    image: grafana/loki:3.4.2
+    ports:
+      - "3100:3100" # Loki HTTP API
+    command: ["-config.file=/etc/loki/local-config.yaml"]
+    networks:
+      - workload-net
+
+  grafana:
+    image: grafana/grafana:latest
+    environment:
+      - GF_AUTH_ANONYMOUS_ENABLED=true
+      - GF_AUTH_ANONYMOUS_ORG_ROLE=Admin
+    ports:
+      - "3000:3000"
+    volumes:
+      - ./grafana/provisioning:/etc/grafana/provisioning:ro
+      - ./grafana/dashboards:/var/lib/grafana/dashboards:ro
+    depends_on:
+      - jaeger
+      - tempo
+      - prometheus
+      - loki
+    networks:
+      - workload-net
+
+volumes:
+  tempo-data:
+
+networks:
+  workload-net:
+    driver: bridge

docker/telemetry/docker-compose.yml

@@ -0,0 +1,118 @@
+# Docker Compose stack for rippled OpenTelemetry observability.
+#
+# Provides services for local development:
+#   - otel-collector: receives OTLP traces from rippled, batches and
+#     forwards them to Jaeger and Tempo. Also tails rippled log files
+#     via filelog receiver and exports to Loki. Listens on ports
+#     4317 (gRPC), 4318 (HTTP), and 8125 (StatsD UDP).
+#   - jaeger: all-in-one tracing backend with UI on port 16686.
+#   - tempo: Grafana Tempo tracing backend, queryable via Grafana Explore
+#     on port 3000. Recommended for production (S3/GCS storage, TraceQL).
+#   - loki: Grafana Loki log aggregation backend for centralized log
+#     ingestion and log-trace correlation (Phase 8).
+#   - grafana: dashboards on port 3000, pre-configured with Jaeger, Tempo,
+#     Prometheus, and Loki datasources.
+#
+# Usage:
+#   docker compose -f docker/telemetry/docker-compose.yml up -d
+#
+# Configure rippled to export traces by adding to xrpld.cfg:
+#   [telemetry]
+#   enabled=1
+#   endpoint=http://localhost:4318/v1/traces
+
+version: "3.8"
+
+services:
+  otel-collector:
+    image: otel/opentelemetry-collector-contrib:latest
+    command: ["--config=/etc/otel-collector-config.yaml"]
+    ports:
+      - "4317:4317" # OTLP gRPC
+      - "4318:4318" # OTLP HTTP (traces + native OTel metrics)
+      - "8889:8889" # Prometheus metrics (spanmetrics + OTLP)
+      - "13133:13133" # Health check
+      # StatsD UDP port removed — beast::insight now uses native OTLP.
+      # Uncomment if using server=statsd fallback:
+      # - "8125:8125/udp"
+    volumes:
+      - ./otel-collector-config.yaml:/etc/otel-collector-config.yaml:ro
+      # Phase 8: Mount rippled log directory for filelog receiver.
+      # The integration test writes logs to /tmp/xrpld-integration/;
+      # mount it read-only so the collector can tail debug.log files.
+      - /tmp/xrpld-integration:/var/log/rippled:ro
+    depends_on:
+      - jaeger
+      - tempo
+      - loki
+    networks:
+      - rippled-telemetry
+
+  jaeger:
+    image: jaegertracing/all-in-one:latest
+    environment:
+      - COLLECTOR_OTLP_ENABLED=true
+    ports:
+      - "16686:16686" # Jaeger UI
+      - "14250:14250" # gRPC
+    networks:
+      - rippled-telemetry
+
+  tempo:
+    image: grafana/tempo:2.7.2
+    command: ["-config.file=/etc/tempo.yaml"]
+    ports:
+      - "3200:3200" # Tempo HTTP API (health, query)
+    volumes:
+      - ./tempo.yaml:/etc/tempo.yaml:ro
+      - tempo-data:/var/tempo
+    networks:
+      - rippled-telemetry
+
+  # Phase 8: Grafana Loki for centralized log ingestion and log-trace
+  # correlation. Loki 3.x supports native OTLP ingestion, so the OTel
+  # Collector exports via otlphttp to Loki's /otlp endpoint.
+  # Query logs via Grafana Explore -> Loki at http://localhost:3000.
+  loki:
+    image: grafana/loki:3.4.2
+    ports:
+      - "3100:3100"
+    command: -config.file=/etc/loki/local-config.yaml
+    networks:
+      - rippled-telemetry
+
+  prometheus:
+    image: prom/prometheus:latest
+    ports:
+      - "9090:9090"
+    volumes:
+      - ./prometheus.yml:/etc/prometheus/prometheus.yml:ro
+    depends_on:
+      - otel-collector
+    networks:
+      - rippled-telemetry
+
+  grafana:
+    image: grafana/grafana:latest
+    environment:
+      - GF_AUTH_ANONYMOUS_ENABLED=true
+      - GF_AUTH_ANONYMOUS_ORG_ROLE=Admin
+    ports:
+      - "3000:3000"
+    volumes:
+      - ./grafana/provisioning:/etc/grafana/provisioning:ro
+      - ./grafana/dashboards:/var/lib/grafana/dashboards:ro
+    depends_on:
+      - jaeger
+      - tempo
+      - prometheus
+      - loki
+    networks:
+      - rippled-telemetry
+
+volumes:
+  tempo-data:
+
+networks:
+  rippled-telemetry:
+    driver: bridge

docker/telemetry/grafana/dashboards/consensus-health.json

@@ -0,0 +1,440 @@
+{
+  "annotations": {
+    "list": []
+  },
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 1,
+  "id": null,
+  "links": [],
+  "panels": [
+    {
+      "title": "Consensus Round Duration",
+      "description": "p95 and p50 duration of consensus accept rounds. The consensus.accept span (RCLConsensus.cpp:395) measures the time to process an accepted ledger including transaction application and state finalization. The span carries xrpl.consensus.proposers and xrpl.consensus.round_time_ms attributes. Normal range is 3-6 seconds on mainnet.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 0
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.95, sum by (le) (rate(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", span_name=\"consensus.accept\"}[5m])))",
+          "legendFormat": "P95 Round Duration"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.50, sum by (le) (rate(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", span_name=\"consensus.accept\"}[5m])))",
+          "legendFormat": "P50 Round Duration"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ms",
+          "custom": {
+            "axisLabel": "Duration (ms)",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Consensus Proposals Sent Rate",
+      "description": "Rate at which this node sends consensus proposals to the network. Sourced from the consensus.proposal.send span (RCLConsensus.cpp:177) which fires each time the node proposes a transaction set. The span carries xrpl.consensus.round identifying the consensus round number. A healthy proposing node should show steady proposal output.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 0
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"consensus.proposal.send\"}[5m]))",
+          "legendFormat": "Proposals / Sec"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "axisLabel": "Proposals / Sec",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Ledger Close Duration",
+      "description": "p95 duration of the ledger close event. The consensus.ledger_close span (RCLConsensus.cpp:282) measures the time from when consensus triggers a ledger close to completion. Carries xrpl.consensus.ledger.seq and xrpl.consensus.mode attributes. Compare with Consensus Round Duration to understand how close timing relates to overall round time.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 8
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.95, sum by (le) (rate(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", span_name=\"consensus.ledger_close\"}[5m])))",
+          "legendFormat": "P95 Close Duration"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ms",
+          "custom": {
+            "axisLabel": "Duration (ms)",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Validation Send Rate",
+      "description": "Rate at which this node sends ledger validations to the network. Sourced from the consensus.validation.send span (RCLConsensus.cpp:753). Each validation confirms the node has fully validated a ledger. The span carries xrpl.consensus.ledger.seq and xrpl.consensus.proposing. Should closely track the ledger close rate when the node is healthy.",
+      "type": "stat",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 8
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"consensus.validation.send\"}[5m]))",
+          "legendFormat": "Validations / Sec"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops"
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Ledger Apply Duration (doAccept)",
+      "description": "Time spent applying the consensus result to build a new ledger. Measured by the consensus.accept.apply span in doAccept().",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 16
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.95, sum by (le) (rate(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", span_name=\"consensus.accept.apply\"}[5m])))",
+          "legendFormat": "P95 Apply Duration"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.50, sum by (le) (rate(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", span_name=\"consensus.accept.apply\"}[5m])))",
+          "legendFormat": "P50 Apply Duration"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ms"
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Close Time Agreement",
+      "description": "Rate of close time agreement vs disagreement across consensus rounds. Based on xrpl.consensus.close_time_correct attribute (true = validators agreed, false = agreed to disagree per avCT_CONSENSUS_PCT).",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 16
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"consensus.accept.apply\"}[5m]))",
+          "legendFormat": "Total Rounds / Sec"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops"
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Consensus Mode Over Time",
+      "description": "Breakdown of consensus ledger close events by the node's consensus mode (proposing, observing, wrongLedger, switchedLedger). Grouped by the xrpl.consensus.mode span attribute from consensus.ledger_close. A healthy validator should be predominantly in 'proposing' mode. Frequent 'wrongLedger' or 'switchedLedger' indicates sync issues.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 24
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum by (xrpl_consensus_mode) (rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"consensus.ledger_close\"}[5m]))",
+          "legendFormat": "{{xrpl_consensus_mode}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "axisLabel": "Events / Sec",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Accept vs Close Rate",
+      "description": "Compares the rate of consensus.accept (ledger accepted after consensus) vs consensus.ledger_close (ledger close initiated). These should track closely in a healthy network. A divergence means some close events are not completing the accept phase, potentially indicating consensus failures or timeouts.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 24
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"consensus.accept\"}[5m]))",
+          "legendFormat": "Accepts / Sec"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"consensus.ledger_close\"}[5m]))",
+          "legendFormat": "Closes / Sec"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "axisLabel": "Events / Sec",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Validation vs Close Rate",
+      "description": "Compares the rate of consensus.validation.send vs consensus.ledger_close. Each validated ledger should produce one validation message. If validations lag behind closes, the node may be falling behind on validation or experiencing issues with the validation pipeline.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 32
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"consensus.validation.send\"}[5m]))",
+          "legendFormat": "Validations / Sec"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"consensus.ledger_close\"}[5m]))",
+          "legendFormat": "Closes / Sec"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "axisLabel": "Events / Sec",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Consensus Accept Duration Heatmap",
+      "description": "Heatmap showing the distribution of consensus.accept span durations across histogram buckets over time. Each cell represents how many accept events fell into that duration bucket in a 5m window. Useful for detecting outlier consensus rounds that take abnormally long.",
+      "type": "heatmap",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 32
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        },
+        "yAxis": {
+          "axisLabel": "Duration (ms)"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(increase(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", span_name=\"consensus.accept\"}[5m])) by (le)",
+          "legendFormat": "{{le}}",
+          "format": "heatmap"
+        }
+      ]
+    }
+  ],
+  "schemaVersion": 39,
+  "tags": ["rippled", "consensus", "telemetry"],
+  "templating": {
+    "list": [
+      {
+        "name": "node",
+        "label": "Node",
+        "description": "Filter by rippled node (service.instance.id \u2014 e.g. Node-1)",
+        "type": "query",
+        "query": "label_values(traces_span_metrics_calls_total, exported_instance)",
+        "datasource": {
+          "type": "prometheus",
+          "uid": "prometheus"
+        },
+        "includeAll": true,
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "multi": true,
+        "refresh": 2,
+        "sort": 1
+      },
+      {
+        "name": "consensus_mode",
+        "label": "Consensus Mode",
+        "description": "Filter by consensus mode (proposing, observing, wrongLedger, switchedLedger)",
+        "type": "query",
+        "query": "label_values(traces_span_metrics_calls_total{span_name=\"consensus.ledger_close\"}, xrpl_consensus_mode)",
+        "datasource": {
+          "type": "prometheus",
+          "uid": "prometheus"
+        },
+        "includeAll": true,
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "multi": true,
+        "refresh": 2,
+        "sort": 1
+      }
+    ]
+  },
+  "time": {
+    "from": "now-1h",
+    "to": "now"
+  },
+  "title": "Consensus Health",
+  "uid": "rippled-consensus"
+}

docker/telemetry/grafana/dashboards/ledger-operations.json

@@ -0,0 +1,347 @@
+{
+  "annotations": {
+    "list": []
+  },
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 1,
+  "id": null,
+  "links": [],
+  "panels": [
+    {
+      "title": "Ledger Build Rate",
+      "description": "Rate at which new ledgers are being built. The ledger.build span (BuildLedger.cpp:31) wraps the entire buildLedgerImpl() function which creates a new ledger from a parent, applies transactions, flushes SHAMap nodes, and sets the accepted state. Should match the consensus close rate (~0.25/sec on mainnet with ~4s rounds).",
+      "type": "stat",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 0
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"ledger.build\"}[5m]))",
+          "legendFormat": "Builds / Sec"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops"
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Ledger Build Duration",
+      "description": "p95 and p50 duration of ledger builds. Measures the full buildLedgerImpl() call including transaction application, SHAMap flushing, and ledger acceptance. The span records xrpl.ledger.seq as an attribute. Long build times indicate expensive transaction sets or I/O pressure from SHAMap flushes.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 0
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.95, sum by (le) (rate(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", span_name=\"ledger.build\"}[5m])))",
+          "legendFormat": "P95 Build Duration"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.50, sum by (le) (rate(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", span_name=\"ledger.build\"}[5m])))",
+          "legendFormat": "P50 Build Duration"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ms",
+          "custom": {
+            "axisLabel": "Duration (ms)",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Ledger Validation Rate",
+      "description": "Rate at which ledgers pass the validation threshold and are accepted as fully validated. The ledger.validate span (LedgerMaster.cpp:915) fires in checkAccept() only after the ledger receives sufficient trusted validations (>= quorum). Records xrpl.ledger.seq and xrpl.ledger.validations (the number of validations received).",
+      "type": "stat",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 8
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"ledger.validate\"}[5m]))",
+          "legendFormat": "Validations / Sec"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops"
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Ledger Build Duration Heatmap",
+      "description": "Heatmap showing the distribution of ledger.build durations across histogram buckets over time. Each cell represents the count of ledger builds that fell into that duration bucket in a 5m window. Useful for spotting occasional slow ledger builds that may not appear in percentile charts.",
+      "type": "heatmap",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 8
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        },
+        "yAxis": {
+          "axisLabel": "Duration (ms)"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(increase(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", span_name=\"ledger.build\"}[5m])) by (le)",
+          "legendFormat": "{{le}}",
+          "format": "heatmap"
+        }
+      ]
+    },
+    {
+      "title": "Transaction Apply Duration",
+      "description": "p95 and p50 duration of applying the consensus transaction set during ledger building. The tx.apply span (BuildLedger.cpp:88) wraps applyTransactions() which iterates through the CanonicalTXSet with multiple retry passes. Records xrpl.ledger.tx_count (successful) and xrpl.ledger.tx_failed (failed) as attributes.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 16
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.95, sum by (le) (rate(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", span_name=\"tx.apply\"}[5m])))",
+          "legendFormat": "P95 tx.apply"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.50, sum by (le) (rate(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", span_name=\"tx.apply\"}[5m])))",
+          "legendFormat": "P50 tx.apply"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ms",
+          "custom": {
+            "axisLabel": "Duration (ms)",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Transaction Apply Rate",
+      "description": "Rate of tx.apply span invocations, reflecting how frequently the transaction application phase runs during ledger building. Each ledger build triggers one tx.apply call. Should closely match the ledger build rate.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 16
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"tx.apply\"}[5m]))",
+          "legendFormat": "tx.apply / Sec"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "axisLabel": "Operations / Sec",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Ledger Store Rate",
+      "description": "Rate at which ledgers are stored into the ledger history. The ledger.store span (LedgerMaster.cpp:409) wraps storeLedger() which inserts the ledger into the LedgerHistory cache. Records xrpl.ledger.seq. Should match the ledger build rate under normal operation.",
+      "type": "stat",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 24
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"ledger.store\"}[5m]))",
+          "legendFormat": "Stores / Sec"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops"
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Build vs Close Duration",
+      "description": "Compares p95 durations of ledger.build (the actual ledger construction in BuildLedger.cpp) vs consensus.ledger_close (the consensus close event in RCLConsensus.cpp). Build time is a subset of close time. A large gap between them indicates overhead in the consensus pipeline outside of ledger construction itself.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 24
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.95, sum by (le) (rate(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", span_name=\"ledger.build\"}[5m])))",
+          "legendFormat": "P95 ledger.build"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.95, sum by (le) (rate(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", span_name=\"consensus.ledger_close\"}[5m])))",
+          "legendFormat": "P95 consensus.ledger_close"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ms",
+          "custom": {
+            "axisLabel": "Duration (ms)",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    }
+  ],
+  "schemaVersion": 39,
+  "tags": ["rippled", "ledger", "telemetry"],
+  "templating": {
+    "list": [
+      {
+        "name": "node",
+        "label": "Node",
+        "description": "Filter by rippled node (service.instance.id \u2014 e.g. Node-1)",
+        "type": "query",
+        "query": "label_values(traces_span_metrics_calls_total, exported_instance)",
+        "datasource": {
+          "type": "prometheus",
+          "uid": "prometheus"
+        },
+        "includeAll": true,
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "multi": true,
+        "refresh": 2,
+        "sort": 1
+      }
+    ]
+  },
+  "time": {
+    "from": "now-1h",
+    "to": "now"
+  },
+  "title": "Ledger Operations",
+  "uid": "rippled-ledger-ops"
+}

docker/telemetry/grafana/dashboards/peer-network.json

@@ -0,0 +1,195 @@
+{
+  "annotations": {
+    "list": []
+  },
+  "description": "Requires trace_peer=1 in the [telemetry] config section.",
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 1,
+  "id": null,
+  "links": [],
+  "panels": [
+    {
+      "title": "Peer Proposal Receive Rate",
+      "description": "Rate of consensus proposals received from network peers. The peer.proposal.receive span (PeerImp.cpp:1667) fires in onMessage(TMProposeSet) for each incoming proposal. Records xrpl.peer.id (sending peer) and xrpl.peer.proposal.trusted (whether the proposer is in our UNL). Requires trace_peer=1 in the telemetry config.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 0
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"peer.proposal.receive\"}[5m]))",
+          "legendFormat": "Proposals Received / Sec"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "axisLabel": "Proposals / Sec",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Peer Validation Receive Rate",
+      "description": "Rate of ledger validations received from network peers. The peer.validation.receive span (PeerImp.cpp:2264) fires in onMessage(TMValidation) for each incoming validation message. Records xrpl.peer.id (sending peer) and xrpl.peer.validation.trusted (whether the validator is trusted). Requires trace_peer=1 in the telemetry config.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 0
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"peer.validation.receive\"}[5m]))",
+          "legendFormat": "Validations Received / Sec"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "axisLabel": "Validations / Sec",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Proposals Trusted vs Untrusted",
+      "description": "Pie chart showing the ratio of proposals received from trusted validators (in our UNL) vs untrusted validators. Grouped by the xrpl.peer.proposal.trusted span attribute (true/false). A healthy node connected to a well-configured UNL should see a significant portion of trusted proposals. Note: proposals that fail early validation may not have the trusted attribute set.",
+      "type": "piechart",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 8
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum by (xrpl_peer_proposal_trusted) (rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"peer.proposal.receive\"}[5m]))",
+          "legendFormat": "Trusted = {{xrpl_peer_proposal_trusted}}"
+        }
+      ]
+    },
+    {
+      "title": "Validations Trusted vs Untrusted",
+      "description": "Pie chart showing the ratio of validations received from trusted validators (in our UNL) vs untrusted validators. Grouped by the xrpl.peer.validation.trusted span attribute (true/false). Monitoring this helps detect if the node is receiving validations from the expected set of trusted validators. Note: validations that fail early checks may not have the trusted attribute set.",
+      "type": "piechart",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 8
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum by (xrpl_peer_validation_trusted) (rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", span_name=\"peer.validation.receive\"}[5m]))",
+          "legendFormat": "Trusted = {{xrpl_peer_validation_trusted}}"
+        }
+      ]
+    }
+  ],
+  "schemaVersion": 39,
+  "tags": ["rippled", "peer", "telemetry"],
+  "templating": {
+    "list": [
+      {
+        "name": "node",
+        "label": "Node",
+        "description": "Filter by rippled node (service.instance.id \u2014 e.g. Node-1)",
+        "type": "query",
+        "query": "label_values(traces_span_metrics_calls_total, exported_instance)",
+        "datasource": {
+          "type": "prometheus",
+          "uid": "prometheus"
+        },
+        "includeAll": true,
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "multi": true,
+        "refresh": 2,
+        "sort": 1
+      },
+      {
+        "name": "proposal_trusted",
+        "label": "Proposal Trusted",
+        "description": "Filter by proposal trust status (true = from trusted validator)",
+        "type": "query",
+        "query": "label_values(traces_span_metrics_calls_total{span_name=\"peer.proposal.receive\"}, xrpl_peer_proposal_trusted)",
+        "datasource": {
+          "type": "prometheus",
+          "uid": "prometheus"
+        },
+        "includeAll": true,
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "multi": true,
+        "refresh": 2,
+        "sort": 1
+      }
+    ]
+  },
+  "time": {
+    "from": "now-1h",
+    "to": "now"
+  },
+  "title": "Peer Network",
+  "uid": "rippled-peer-net"
+}

docker/telemetry/grafana/dashboards/rippled-fee-market.json

@@ -0,0 +1,338 @@
+{
+  "annotations": {
+    "list": []
+  },
+  "description": "Fee market dynamics: TxQ depth/capacity, fee escalation levels, and load factor breakdown. Sourced from OTel MetricsRegistry observable gauges (Phase 9).",
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 1,
+  "id": null,
+  "links": [],
+  "panels": [
+    {
+      "title": "Transaction Queue Depth",
+      "description": "Current number of transactions waiting in the queue vs. maximum capacity. Sourced from MetricsRegistry txq_metrics observable gauge with metric=txq_count and metric=txq_max_size.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 0
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_txq_metrics{exported_instance=~\"$node\", metric=\"txq_count\"}",
+          "legendFormat": "Queue Depth"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_txq_metrics{exported_instance=~\"$node\", metric=\"txq_max_size\"}",
+          "legendFormat": "Max Capacity"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "short",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 2,
+            "fillOpacity": 10
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Transactions Per Ledger",
+      "description": "Transactions in the current open ledger vs. expected per-ledger count. Sourced from txq_metrics with metric=txq_in_ledger and metric=txq_per_ledger.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 0
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_txq_metrics{exported_instance=~\"$node\", metric=\"txq_in_ledger\"}",
+          "legendFormat": "In Ledger"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_txq_metrics{exported_instance=~\"$node\", metric=\"txq_per_ledger\"}",
+          "legendFormat": "Expected Per Ledger"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "short",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 2,
+            "fillOpacity": 10
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Fee Escalation Levels",
+      "description": "Fee levels that control transaction queue admission. Reference fee level is the baseline; open ledger fee level triggers escalation. Sourced from txq_metrics observable gauge.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 24,
+        "x": 0,
+        "y": 8
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_txq_metrics{exported_instance=~\"$node\", metric=\"txq_reference_fee_level\"}",
+          "legendFormat": "Reference Fee Level"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_txq_metrics{exported_instance=~\"$node\", metric=\"txq_min_processing_fee_level\"}",
+          "legendFormat": "Min Processing Fee Level"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_txq_metrics{exported_instance=~\"$node\", metric=\"txq_med_fee_level\"}",
+          "legendFormat": "Median Fee Level"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_txq_metrics{exported_instance=~\"$node\", metric=\"txq_open_ledger_fee_level\"}",
+          "legendFormat": "Open Ledger Fee Level"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "short",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 2,
+            "fillOpacity": 5,
+            "scaleDistribution": {
+              "type": "log",
+              "log": 2
+            }
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Load Factor Breakdown",
+      "description": "Decomposed load factor components: server (max of local, net, cluster), fee escalation, fee queue, and combined. Values are unitless multipliers where 1.0 = no load. Sourced from load_factor_metrics observable gauge.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 16
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_load_factor_metrics{exported_instance=~\"$node\", metric=\"load_factor\"}",
+          "legendFormat": "Combined Load Factor"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_load_factor_metrics{exported_instance=~\"$node\", metric=\"load_factor_server\"}",
+          "legendFormat": "Server"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_load_factor_metrics{exported_instance=~\"$node\", metric=\"load_factor_fee_escalation\"}",
+          "legendFormat": "Fee Escalation"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_load_factor_metrics{exported_instance=~\"$node\", metric=\"load_factor_fee_queue\"}",
+          "legendFormat": "Fee Queue"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "short",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 2,
+            "fillOpacity": 5
+          },
+          "color": {
+            "mode": "palette-classic"
+          },
+          "thresholds": {
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "yellow",
+                "value": 2
+              },
+              {
+                "color": "red",
+                "value": 10
+              }
+            ]
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Load Factor Components",
+      "description": "Individual load factor contributors: local server load, network load, and cluster load. Only differ from 1.0 under load conditions. Sourced from load_factor_metrics observable gauge.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 16
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_load_factor_metrics{exported_instance=~\"$node\", metric=\"load_factor_local\"}",
+          "legendFormat": "Local"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_load_factor_metrics{exported_instance=~\"$node\", metric=\"load_factor_net\"}",
+          "legendFormat": "Network"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "rippled_load_factor_metrics{exported_instance=~\"$node\", metric=\"load_factor_cluster\"}",
+          "legendFormat": "Cluster"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "short",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 2,
+            "fillOpacity": 5
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    }
+  ],
+  "schemaVersion": 39,
+  "tags": ["rippled", "otel", "fee-market"],
+  "templating": {
+    "list": [
+      {
+        "name": "node",
+        "label": "Node",
+        "description": "Filter by rippled node (service.instance.id)",
+        "type": "query",
+        "query": "label_values(exported_instance)",
+        "datasource": {
+          "type": "prometheus",
+          "uid": "prometheus"
+        },
+        "includeAll": true,
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "multi": true,
+        "refresh": 2,
+        "sort": 1
+      }
+    ]
+  },
+  "time": {
+    "from": "now-1h",
+    "to": "now"
+  },
+  "timepicker": {},
+  "timezone": "browser",
+  "title": "rippled - Fee Market & TxQ",
+  "uid": "rippled-fee-market",
+  "version": 1
+}

docker/telemetry/grafana/dashboards/rippled-job-queue.json

@@ -0,0 +1,365 @@
+{
+  "annotations": {
+    "list": []
+  },
+  "description": "Job queue analysis: per-job-type throughput rates, queue wait times, and execution times. Sourced from OTel MetricsRegistry synchronous counters and histograms (Phase 9).",
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 1,
+  "id": null,
+  "links": [],
+  "panels": [
+    {
+      "title": "Job Throughput Rate (per second)",
+      "description": "Rate of jobs queued, started, and finished across all job types. Computed as rate() over the OTel counter values. High queue rates with low finish rates indicate backlog.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 24,
+        "x": 0,
+        "y": 0
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(rippled_job_queued_total{exported_instance=~\"$node\"}[5m]))",
+          "legendFormat": "Queued/s"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(rippled_job_started_total{exported_instance=~\"$node\"}[5m]))",
+          "legendFormat": "Started/s"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(rippled_job_finished_total{exported_instance=~\"$node\"}[5m]))",
+          "legendFormat": "Finished/s"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 2,
+            "fillOpacity": 10
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Per-Job-Type Queued Rate",
+      "description": "Rate of jobs queued broken down by job_type label. Identifies which job types contribute most to queue activity.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 8
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        },
+        "legend": {
+          "displayMode": "table",
+          "placement": "right",
+          "calcs": ["mean", "max"]
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "topk(10, rate(rippled_job_queued_total{exported_instance=~\"$node\"}[5m]))",
+          "legendFormat": "{{job_type}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 1,
+            "fillOpacity": 5
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Per-Job-Type Finish Rate",
+      "description": "Rate of jobs completing broken down by job_type. Compare with queued rate to identify backlog per type.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 8
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        },
+        "legend": {
+          "displayMode": "table",
+          "placement": "right",
+          "calcs": ["mean", "max"]
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "topk(10, rate(rippled_job_finished_total{exported_instance=~\"$node\"}[5m]))",
+          "legendFormat": "{{job_type}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 1,
+            "fillOpacity": 5
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Job Queue Wait Time (p50, p95, p99)",
+      "description": "Histogram quantiles for time jobs spend waiting in the queue before execution starts. High values indicate thread pool saturation.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 16
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.50, sum by (le) (rate(rippled_job_queued_duration_us_bucket{exported_instance=~\"$node\"}[5m])))",
+          "legendFormat": "p50"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.95, sum by (le) (rate(rippled_job_queued_duration_us_bucket{exported_instance=~\"$node\"}[5m])))",
+          "legendFormat": "p95"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.99, sum by (le) (rate(rippled_job_queued_duration_us_bucket{exported_instance=~\"$node\"}[5m])))",
+          "legendFormat": "p99"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "us",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 2,
+            "fillOpacity": 5
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Job Execution Time (p50, p95, p99)",
+      "description": "Histogram quantiles for actual job execution time. High values indicate expensive operations or resource contention.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 16
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.50, sum by (le) (rate(rippled_job_running_duration_us_bucket{exported_instance=~\"$node\"}[5m])))",
+          "legendFormat": "p50"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.95, sum by (le) (rate(rippled_job_running_duration_us_bucket{exported_instance=~\"$node\"}[5m])))",
+          "legendFormat": "p95"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.99, sum by (le) (rate(rippled_job_running_duration_us_bucket{exported_instance=~\"$node\"}[5m])))",
+          "legendFormat": "p99"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "us",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 2,
+            "fillOpacity": 5
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Per-Job-Type Execution Time (p95)",
+      "description": "95th percentile execution time broken down by job type. Identifies the slowest job types.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 24,
+        "x": 0,
+        "y": 24
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        },
+        "legend": {
+          "displayMode": "table",
+          "placement": "right",
+          "calcs": ["mean", "max"]
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "topk(10, histogram_quantile(0.95, sum by (le, job_type) (rate(rippled_job_running_duration_us_bucket{exported_instance=~\"$node\"}[5m]))))",
+          "legendFormat": "{{job_type}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "us",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 1,
+            "fillOpacity": 5
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    }
+  ],
+  "schemaVersion": 39,
+  "tags": ["rippled", "otel", "job-queue"],
+  "templating": {
+    "list": [
+      {
+        "name": "node",
+        "label": "Node",
+        "description": "Filter by rippled node (service.instance.id)",
+        "type": "query",
+        "query": "label_values(exported_instance)",
+        "datasource": {
+          "type": "prometheus",
+          "uid": "prometheus"
+        },
+        "includeAll": true,
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "multi": true,
+        "refresh": 2,
+        "sort": 1
+      },
+      {
+        "name": "job_type",
+        "label": "Job Type",
+        "description": "Filter by job type",
+        "type": "query",
+        "query": "label_values(rippled_job_queued_total, job_type)",
+        "datasource": {
+          "type": "prometheus",
+          "uid": "prometheus"
+        },
+        "includeAll": true,
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "multi": true,
+        "refresh": 2,
+        "sort": 1
+      }
+    ]
+  },
+  "time": {
+    "from": "now-1h",
+    "to": "now"
+  },
+  "timepicker": {},
+  "timezone": "browser",
+  "title": "rippled - Job Queue Analysis",
+  "uid": "rippled-job-queue",
+  "version": 1
+}

docker/telemetry/grafana/dashboards/rippled-rpc-perf.json

@@ -0,0 +1,374 @@
+{
+  "annotations": {
+    "list": []
+  },
+  "description": "Per-RPC-method performance: call rates, error rates, and latency distributions. Sourced from OTel MetricsRegistry synchronous counters and histograms (Phase 9).",
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 1,
+  "id": null,
+  "links": [],
+  "panels": [
+    {
+      "title": "RPC Call Rate (all methods)",
+      "description": "Aggregate rate of RPC calls started, finished, and errored across all methods. Computed as rate() over OTel counters.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 24,
+        "x": 0,
+        "y": 0
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(rippled_rpc_method_started_total{exported_instance=~\"$node\"}[5m]))",
+          "legendFormat": "Started/s"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(rippled_rpc_method_finished_total{exported_instance=~\"$node\"}[5m]))",
+          "legendFormat": "Finished/s"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(rippled_rpc_method_errored_total{exported_instance=~\"$node\"}[5m]))",
+          "legendFormat": "Errored/s"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 2,
+            "fillOpacity": 10
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Per-Method Call Rate (Top 10)",
+      "description": "Per-method RPC call rate, showing the 10 most active methods. Useful for identifying hot paths.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 8
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        },
+        "legend": {
+          "displayMode": "table",
+          "placement": "right",
+          "calcs": ["mean", "max"]
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "topk(10, rate(rippled_rpc_method_started_total{exported_instance=~\"$node\"}[5m]))",
+          "legendFormat": "{{method}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 1,
+            "fillOpacity": 5
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Per-Method Error Rate (Top 10)",
+      "description": "Per-method RPC error rate. Non-zero values warrant investigation. Common culprits: invalid parameters, resource exhaustion.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 8
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        },
+        "legend": {
+          "displayMode": "table",
+          "placement": "right",
+          "calcs": ["mean", "max"]
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "topk(10, rate(rippled_rpc_method_errored_total{exported_instance=~\"$node\"}[5m]))",
+          "legendFormat": "{{method}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 1,
+            "fillOpacity": 5
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "RPC Latency (p50, p95, p99) - All Methods",
+      "description": "Histogram quantiles for RPC execution time across all methods. Sourced from rpc_method_duration_us histogram.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 16
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.50, sum by (le) (rate(rippled_rpc_method_duration_us_bucket{exported_instance=~\"$node\"}[5m])))",
+          "legendFormat": "p50"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.95, sum by (le) (rate(rippled_rpc_method_duration_us_bucket{exported_instance=~\"$node\"}[5m])))",
+          "legendFormat": "p95"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.99, sum by (le) (rate(rippled_rpc_method_duration_us_bucket{exported_instance=~\"$node\"}[5m])))",
+          "legendFormat": "p99"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "us",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 2,
+            "fillOpacity": 5
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Per-Method Latency p95 (Top 10 Slowest)",
+      "description": "95th percentile execution time per method. Identifies the slowest RPC endpoints.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 16
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        },
+        "legend": {
+          "displayMode": "table",
+          "placement": "right",
+          "calcs": ["mean", "max"]
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "topk(10, histogram_quantile(0.95, sum by (le, method) (rate(rippled_rpc_method_duration_us_bucket{exported_instance=~\"$node\"}[5m]))))",
+          "legendFormat": "{{method}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "us",
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 1,
+            "fillOpacity": 5
+          },
+          "color": {
+            "mode": "palette-classic"
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "RPC Error Ratio by Method",
+      "description": "Error ratio (errors / total started) per method. Values above 0.05 (5%) warrant investigation.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 24,
+        "x": 0,
+        "y": 24
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        },
+        "legend": {
+          "displayMode": "table",
+          "placement": "right",
+          "calcs": ["mean", "max"]
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "topk(10, rate(rippled_rpc_method_errored_total{exported_instance=~\"$node\"}[5m]) / (rate(rippled_rpc_method_started_total{exported_instance=~\"$node\"}[5m]) > 0))",
+          "legendFormat": "{{method}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "percentunit",
+          "min": 0,
+          "max": 1,
+          "custom": {
+            "drawStyle": "line",
+            "lineWidth": 1,
+            "fillOpacity": 5
+          },
+          "color": {
+            "mode": "palette-classic"
+          },
+          "thresholds": {
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "yellow",
+                "value": 0.05
+              },
+              {
+                "color": "red",
+                "value": 0.25
+              }
+            ]
+          }
+        },
+        "overrides": []
+      }
+    }
+  ],
+  "schemaVersion": 39,
+  "tags": ["rippled", "otel", "rpc"],
+  "templating": {
+    "list": [
+      {
+        "name": "node",
+        "label": "Node",
+        "description": "Filter by rippled node (service.instance.id)",
+        "type": "query",
+        "query": "label_values(exported_instance)",
+        "datasource": {
+          "type": "prometheus",
+          "uid": "prometheus"
+        },
+        "includeAll": true,
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "multi": true,
+        "refresh": 2,
+        "sort": 1
+      },
+      {
+        "name": "method",
+        "label": "RPC Method",
+        "description": "Filter by RPC method",
+        "type": "query",
+        "query": "label_values(rippled_rpc_method_started_total, method)",
+        "datasource": {
+          "type": "prometheus",
+          "uid": "prometheus"
+        },
+        "includeAll": true,
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "multi": true,
+        "refresh": 2,
+        "sort": 1
+      }
+    ]
+  },
+  "time": {
+    "from": "now-1h",
+    "to": "now"
+  },
+  "timepicker": {},
+  "timezone": "browser",
+  "title": "rippled - RPC Performance (OTel)",
+  "uid": "rippled-rpc-perf",
+  "version": 1
+}

docker/telemetry/grafana/dashboards/rpc-performance.json

@@ -0,0 +1,376 @@
+{
+  "annotations": {
+    "list": []
+  },
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 1,
+  "id": null,
+  "links": [],
+  "panels": [
+    {
+      "title": "RPC Request Rate by Command",
+      "description": "Per-second rate of RPC command executions, broken down by command name (e.g. server_info, submit). Calculated as rate(traces_span_metrics_calls_total{span_name=~\"rpc.command.*\"}) over a 5m window, grouped by the xrpl.rpc.command span attribute.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 0
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum by (xrpl_rpc_command) (rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", xrpl_rpc_command=~\"$command\", span_name=~\"rpc.command.*\"}[5m]))",
+          "legendFormat": "{{xrpl_rpc_command}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "reqps",
+          "custom": {
+            "axisLabel": "Requests / Sec",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "RPC Latency p95 by Command",
+      "description": "95th percentile response time for each RPC command. Computed from the spanmetrics duration histogram using histogram_quantile(0.95) over rpc.command.* spans, grouped by xrpl.rpc.command. High values indicate slow commands that may need optimization.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 0
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "histogram_quantile(0.95, sum by (le, xrpl_rpc_command) (rate(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", xrpl_rpc_command=~\"$command\", span_name=~\"rpc.command.*\"}[5m])))",
+          "legendFormat": "P95 {{xrpl_rpc_command}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ms",
+          "custom": {
+            "axisLabel": "Latency (ms)",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "RPC Error Rate",
+      "description": "Percentage of RPC commands that completed with an error status, per command. Calculated as (error calls / total calls) * 100, where errors have status_code=STATUS_CODE_ERROR. Thresholds: green < 1%, yellow 1-5%, red > 5%.",
+      "type": "bargauge",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 8
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum by (xrpl_rpc_command) (rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", xrpl_rpc_command=~\"$command\", span_name=~\"rpc.command.*\", status_code=\"STATUS_CODE_ERROR\"}[5m])) / sum by (xrpl_rpc_command) (rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", xrpl_rpc_command=~\"$command\", span_name=~\"rpc.command.*\"}[5m])) * 100",
+          "legendFormat": "{{xrpl_rpc_command}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "percent",
+          "thresholds": {
+            "steps": [
+              {
+                "color": "green",
+                "value": null
+              },
+              {
+                "color": "yellow",
+                "value": 1
+              },
+              {
+                "color": "red",
+                "value": 5
+              }
+            ]
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "RPC Latency Heatmap",
+      "description": "Distribution of RPC command response times across histogram buckets. Shows the density of requests at each latency level over time. Each cell represents the count of requests that fell into that duration bucket in a 5m window. Useful for spotting bimodal latency patterns.",
+      "type": "heatmap",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 8
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        },
+        "yAxis": {
+          "axisLabel": "Duration (ms)"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(increase(traces_span_metrics_duration_milliseconds_bucket{exported_instance=~\"$node\", xrpl_rpc_command=~\"$command\", span_name=~\"rpc.command.*\"}[5m])) by (le)",
+          "legendFormat": "{{le}}",
+          "format": "heatmap"
+        }
+      ]
+    },
+    {
+      "title": "Overall RPC Throughput",
+      "description": "Aggregate RPC throughput showing two layers of the request pipeline. rpc.request is the outer HTTP handler (ServerHandler.cpp:271) that accepts incoming connections. rpc.process is the inner processing layer (ServerHandler.cpp:573) that parses and dispatches. A gap between the two indicates requests being queued or rejected before processing.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 16
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", xrpl_rpc_command=~\"$command\", span_name=\"rpc.request\"}[5m]))",
+          "legendFormat": "rpc.request / Sec"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", xrpl_rpc_command=~\"$command\", span_name=\"rpc.process\"}[5m]))",
+          "legendFormat": "rpc.process / Sec"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "reqps",
+          "custom": {
+            "axisLabel": "Requests / Sec",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "RPC Success vs Error",
+      "description": "Aggregate rate of successful vs failed RPC commands across all command types. Success = status_code UNSET (OpenTelemetry default for OK spans). Error = status_code STATUS_CODE_ERROR. A sustained error rate warrants investigation via per-command breakdown above.",
+      "type": "timeseries",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 16
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", xrpl_rpc_command=~\"$command\", span_name=~\"rpc.command.*\", status_code=\"STATUS_CODE_UNSET\"}[5m]))",
+          "legendFormat": "Success"
+        },
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", xrpl_rpc_command=~\"$command\", span_name=~\"rpc.command.*\", status_code=\"STATUS_CODE_ERROR\"}[5m]))",
+          "legendFormat": "Error"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops",
+          "custom": {
+            "axisLabel": "Commands / Sec",
+            "spanNulls": true,
+            "insertNulls": false,
+            "showPoints": "auto",
+            "pointSize": 3
+          }
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "Top Commands by Volume",
+      "description": "Top 10 most frequently called RPC commands by total invocation count over the last 5 minutes. Uses topk(10, increase(calls_total)) to rank commands. Helps identify the hottest API endpoints driving load on the node.",
+      "type": "bargauge",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 24
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "topk(10, sum by (xrpl_rpc_command) (increase(traces_span_metrics_calls_total{exported_instance=~\"$node\", xrpl_rpc_command=~\"$command\", span_name=~\"rpc.command.*\"}[5m])))",
+          "legendFormat": "{{xrpl_rpc_command}}"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "short"
+        },
+        "overrides": []
+      }
+    },
+    {
+      "title": "WebSocket Message Rate",
+      "description": "Rate of incoming WebSocket RPC messages processed by the server. Sourced from the rpc.ws_message span (ServerHandler.cpp:384). Only active when clients connect via WebSocket instead of HTTP. Zero is normal if only HTTP RPC is in use.",
+      "type": "stat",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 24
+      },
+      "options": {
+        "tooltip": {
+          "mode": "multi",
+          "sort": "desc"
+        }
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "prometheus"
+          },
+          "expr": "sum(rate(traces_span_metrics_calls_total{exported_instance=~\"$node\", xrpl_rpc_command=~\"$command\", span_name=\"rpc.ws_message\"}[5m]))",
+          "legendFormat": "WS Messages / Sec"
+        }
+      ],
+      "fieldConfig": {
+        "defaults": {
+          "unit": "ops"
+        },
+        "overrides": []
+      }
+    }
+  ],
+  "schemaVersion": 39,
+  "tags": ["rippled", "rpc", "telemetry"],
+  "templating": {
+    "list": [
+      {
+        "name": "node",
+        "label": "Node",
+        "description": "Filter by rippled node (service.instance.id \u2014 e.g. Node-1)",
+        "type": "query",
+        "query": "label_values(traces_span_metrics_calls_total, exported_instance)",
+        "datasource": {
+          "type": "prometheus",
+          "uid": "prometheus"
+        },
+        "includeAll": true,
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "multi": true,
+        "refresh": 2,
+        "sort": 1
+      },
+      {
+        "name": "command",
+        "label": "RPC Command",
+        "description": "Filter by RPC command name (e.g., server_info, submit)",
+        "type": "query",
+        "query": "label_values(traces_span_metrics_calls_total{span_name=~\"rpc.command.*\"}, xrpl_rpc_command)",
+        "datasource": {
+          "type": "prometheus",
+          "uid": "prometheus"
+        },
+        "includeAll": true,
+        "allValue": ".*",
+        "current": {
+          "text": "All",
+          "value": "$__all"
+        },
+        "multi": true,
+        "refresh": 2,
+        "sort": 1
+      }
+    ]
+  },
+  "time": {
+    "from": "now-1h",
+    "to": "now"
+  },
+  "title": "RPC Performance",
+  "uid": "rippled-rpc-perf"
+}