sync with develop

We are already using OpenSSL 3.5.2. The version number in the `find_dependency` statement is optional, and belongs in `conanfile.py` anyway.

.github/actions/build-deps/action.yml

@@ -10,10 +10,17 @@ inputs:
   build_type:
     description: 'The build type to use ("Debug", "Release").'
     required: true
+  build_nproc:
+    description: "The number of processors to use for building."
+    required: true
   force_build:
     description: 'Force building of all dependencies ("true", "false").'
     required: false
     default: "false"
+  log_verbosity:
+    description: "The logging verbosity."
+    required: false
+    default: "verbose"
 
 runs:
   using: composite
@@ -22,16 +29,21 @@ runs:
       shell: bash
       env:
         BUILD_DIR: ${{ inputs.build_dir }}
+        BUILD_NPROC: ${{ inputs.build_nproc }}
         BUILD_OPTION: ${{ inputs.force_build == 'true' && '*' || 'missing' }}
         BUILD_TYPE: ${{ inputs.build_type }}
+        LOG_VERBOSITY: ${{ inputs.log_verbosity }}
       run: |
         echo 'Installing dependencies.'
-        mkdir -p '${{ env.BUILD_DIR }}'
-        cd '${{ env.BUILD_DIR }}'
+        mkdir -p "${BUILD_DIR}"
+        cd "${BUILD_DIR}"
         conan install \
           --output-folder . \
-          --build=${{ env.BUILD_OPTION }} \
+          --build="${BUILD_OPTION}" \
           --options:host='&:tests=True' \
           --options:host='&:xrpld=True' \
-          --settings:all build_type='${{ env.BUILD_TYPE }}' \
+          --settings:all build_type="${BUILD_TYPE}" \
+          --conf:all tools.build:jobs=${BUILD_NPROC} \
+          --conf:all tools.build:verbosity="${LOG_VERBOSITY}" \
+          --conf:all tools.compilation:verbosity="${LOG_VERBOSITY}" \
           ..

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

@@ -39,8 +39,8 @@ runs:
         CONAN_REMOTE_NAME: ${{ inputs.conan_remote_name }}
         CONAN_REMOTE_URL: ${{ inputs.conan_remote_url }}
       run: |
-        echo "Adding Conan remote '${{ env.CONAN_REMOTE_NAME }}' at '${{ env.CONAN_REMOTE_URL }}'."
-        conan remote add --index 0 --force '${{ env.CONAN_REMOTE_NAME }}' '${{ env.CONAN_REMOTE_URL }}'
+        echo "Adding Conan remote '${CONAN_REMOTE_NAME}' at '${CONAN_REMOTE_URL}'."
+        conan remote add --index 0 --force "${CONAN_REMOTE_NAME}" "${CONAN_REMOTE_URL}"
 
         echo 'Listing Conan remotes.'
         conan remote list

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

@@ -17,7 +17,7 @@ Loop: xrpld.app xrpld.rpc
   xrpld.rpc > xrpld.app
 
 Loop: xrpld.app xrpld.shamap
-  xrpld.app > xrpld.shamap
+  xrpld.shamap ~= xrpld.app
 
 Loop: xrpld.core xrpld.perflog
   xrpld.perflog == xrpld.core

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

@@ -8,6 +8,10 @@ libxrpl.ledger > xrpl.ledger
 libxrpl.ledger > xrpl.protocol
 libxrpl.net > xrpl.basics
 libxrpl.net > xrpl.net
+libxrpl.nodestore > xrpl.basics
+libxrpl.nodestore > xrpl.json
+libxrpl.nodestore > xrpl.nodestore
+libxrpl.nodestore > xrpl.protocol
 libxrpl.protocol > xrpl.basics
 libxrpl.protocol > xrpl.json
 libxrpl.protocol > xrpl.protocol
@@ -18,6 +22,9 @@ libxrpl.server > xrpl.basics
 libxrpl.server > xrpl.json
 libxrpl.server > xrpl.protocol
 libxrpl.server > xrpl.server
+libxrpl.shamap > xrpl.basics
+libxrpl.shamap > xrpl.protocol
+libxrpl.shamap > xrpl.shamap
 test.app > test.jtx
 test.app > test.rpc
 test.app > test.toplevel
@@ -25,11 +32,11 @@ test.app > test.unit_test
 test.app > xrpl.basics
 test.app > xrpld.app
 test.app > xrpld.core
-test.app > xrpld.nodestore
 test.app > xrpld.overlay
 test.app > xrpld.rpc
 test.app > xrpl.json
 test.app > xrpl.ledger
+test.app > xrpl.nodestore
 test.app > xrpl.protocol
 test.app > xrpl.resource
 test.basics > test.jtx
@@ -86,8 +93,7 @@ test.nodestore > test.toplevel
 test.nodestore > test.unit_test
 test.nodestore > xrpl.basics
 test.nodestore > xrpld.core
-test.nodestore > xrpld.nodestore
-test.nodestore > xrpld.unity
+test.nodestore > xrpl.nodestore
 test.overlay > test.jtx
 test.overlay > test.toplevel
 test.overlay > test.unit_test
@@ -95,8 +101,8 @@ test.overlay > xrpl.basics
 test.overlay > xrpld.app
 test.overlay > xrpld.overlay
 test.overlay > xrpld.peerfinder
-test.overlay > xrpld.shamap
 test.overlay > xrpl.protocol
+test.overlay > xrpl.shamap
 test.peerfinder > test.beast
 test.peerfinder > test.unit_test
 test.peerfinder > xrpl.basics
@@ -131,18 +137,22 @@ test.server > xrpl.json
 test.server > xrpl.server
 test.shamap > test.unit_test
 test.shamap > xrpl.basics
-test.shamap > xrpld.nodestore
-test.shamap > xrpld.shamap
+test.shamap > xrpl.nodestore
 test.shamap > xrpl.protocol
+test.shamap > xrpl.shamap
 test.toplevel > test.csf
 test.toplevel > xrpl.json
 test.unit_test > xrpl.basics
 tests.libxrpl > xrpl.basics
+tests.libxrpl > xrpl.ledger
+tests.libxrpl > xrpl.json
 tests.libxrpl > xrpl.net
 xrpl.json > xrpl.basics
 xrpl.ledger > xrpl.basics
 xrpl.ledger > xrpl.protocol
 xrpl.net > xrpl.basics
+xrpl.nodestore > xrpl.basics
+xrpl.nodestore > xrpl.protocol
 xrpl.protocol > xrpl.basics
 xrpl.protocol > xrpl.json
 xrpl.resource > xrpl.basics
@@ -151,17 +161,21 @@ xrpl.resource > xrpl.protocol
 xrpl.server > xrpl.basics
 xrpl.server > xrpl.json
 xrpl.server > xrpl.protocol
+xrpl.shamap > xrpl.basics
+xrpl.shamap > xrpl.nodestore
+xrpl.shamap > xrpl.protocol
 xrpld.app > test.unit_test
 xrpld.app > xrpl.basics
 xrpld.app > xrpld.conditions
 xrpld.app > xrpld.consensus
-xrpld.app > xrpld.nodestore
 xrpld.app > xrpld.perflog
 xrpld.app > xrpl.json
 xrpld.app > xrpl.ledger
 xrpld.app > xrpl.net
+xrpld.app > xrpl.nodestore
 xrpld.app > xrpl.protocol
 xrpld.app > xrpl.resource
+xrpld.app > xrpl.shamap
 xrpld.conditions > xrpl.basics
 xrpld.conditions > xrpl.protocol
 xrpld.consensus > xrpl.basics
@@ -171,11 +185,6 @@ xrpld.core > xrpl.basics
 xrpld.core > xrpl.json
 xrpld.core > xrpl.net
 xrpld.core > xrpl.protocol
-xrpld.nodestore > xrpl.basics
-xrpld.nodestore > xrpld.core
-xrpld.nodestore > xrpld.unity
-xrpld.nodestore > xrpl.json
-xrpld.nodestore > xrpl.protocol
 xrpld.overlay > xrpl.basics
 xrpld.overlay > xrpld.core
 xrpld.overlay > xrpld.peerfinder
@@ -191,13 +200,11 @@ xrpld.perflog > xrpl.basics
 xrpld.perflog > xrpl.json
 xrpld.rpc > xrpl.basics
 xrpld.rpc > xrpld.core
-xrpld.rpc > xrpld.nodestore
 xrpld.rpc > xrpl.json
 xrpld.rpc > xrpl.ledger
 xrpld.rpc > xrpl.net
+xrpld.rpc > xrpl.nodestore
 xrpld.rpc > xrpl.protocol
 xrpld.rpc > xrpl.resource
 xrpld.rpc > xrpl.server
-xrpld.shamap > xrpl.basics
-xrpld.shamap > xrpld.nodestore
-xrpld.shamap > xrpl.protocol
+xrpld.shamap > xrpl.shamap

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

@@ -74,14 +74,14 @@ def generate_strategy_matrix(all: bool, config: Config) -> list:
                     continue
 
             # RHEL:
-            # - 9.4 using GCC 12: Debug and Unity on linux/amd64.
-            # - 9.6 using Clang: Release and no Unity on linux/amd64.
+            # - 9 using GCC 12: Debug and Unity on linux/amd64.
+            # - 10 using Clang: Release and no Unity on linux/amd64.
             if os['distro_name'] == 'rhel':
                 skip = True
-                if os['distro_version'] == '9.4':
+                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
-                elif os['distro_version'] == '9.6':
+                elif os['distro_version'] == '10':
                     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
                 if skip:

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

@@ -14,139 +14,169 @@
       "distro_name": "debian",
       "distro_version": "bookworm",
       "compiler_name": "gcc",
-      "compiler_version": "12"
+      "compiler_version": "12",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "debian",
       "distro_version": "bookworm",
       "compiler_name": "gcc",
-      "compiler_version": "13"
+      "compiler_version": "13",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "debian",
       "distro_version": "bookworm",
       "compiler_name": "gcc",
-      "compiler_version": "14"
+      "compiler_version": "14",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "debian",
       "distro_version": "bookworm",
       "compiler_name": "gcc",
-      "compiler_version": "15"
+      "compiler_version": "15",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "debian",
       "distro_version": "bookworm",
       "compiler_name": "clang",
-      "compiler_version": "16"
+      "compiler_version": "16",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "debian",
       "distro_version": "bookworm",
       "compiler_name": "clang",
-      "compiler_version": "17"
+      "compiler_version": "17",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "debian",
       "distro_version": "bookworm",
       "compiler_name": "clang",
-      "compiler_version": "18"
+      "compiler_version": "18",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "debian",
       "distro_version": "bookworm",
       "compiler_name": "clang",
-      "compiler_version": "19"
+      "compiler_version": "19",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "debian",
       "distro_version": "bookworm",
       "compiler_name": "clang",
-      "compiler_version": "20"
+      "compiler_version": "20",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "rhel",
-      "distro_version": "9.4",
+      "distro_version": "8",
       "compiler_name": "gcc",
-      "compiler_version": "12"
+      "compiler_version": "14",
+      "image_sha": "10e69b4"
     },
     {
       "distro_name": "rhel",
-      "distro_version": "9.4",
-      "compiler_name": "gcc",
-      "compiler_version": "13"
-    },
-    {
-      "distro_name": "rhel",
-      "distro_version": "9.4",
-      "compiler_name": "gcc",
-      "compiler_version": "14"
-    },
-    {
-      "distro_name": "rhel",
-      "distro_version": "9.6",
-      "compiler_name": "gcc",
-      "compiler_version": "13"
-    },
-    {
-      "distro_name": "rhel",
-      "distro_version": "9.6",
-      "compiler_name": "gcc",
-      "compiler_version": "14"
-    },
-    {
-      "distro_name": "rhel",
-      "distro_version": "9.4",
+      "distro_version": "8",
       "compiler_name": "clang",
-      "compiler_version": "any"
+      "compiler_version": "any",
+      "image_sha": "10e69b4"
     },
     {
       "distro_name": "rhel",
-      "distro_version": "9.6",
+      "distro_version": "9",
+      "compiler_name": "gcc",
+      "compiler_version": "12",
+      "image_sha": "10e69b4"
+    },
+    {
+      "distro_name": "rhel",
+      "distro_version": "9",
+      "compiler_name": "gcc",
+      "compiler_version": "13",
+      "image_sha": "10e69b4"
+    },
+    {
+      "distro_name": "rhel",
+      "distro_version": "9",
+      "compiler_name": "gcc",
+      "compiler_version": "14",
+      "image_sha": "10e69b4"
+    },
+    {
+      "distro_name": "rhel",
+      "distro_version": "9",
       "compiler_name": "clang",
-      "compiler_version": "any"
+      "compiler_version": "any",
+      "image_sha": "10e69b4"
+    },
+    {
+      "distro_name": "rhel",
+      "distro_version": "10",
+      "compiler_name": "gcc",
+      "compiler_version": "14",
+      "image_sha": "10e69b4"
+    },
+    {
+      "distro_name": "rhel",
+      "distro_version": "10",
+      "compiler_name": "clang",
+      "compiler_version": "any",
+      "image_sha": "10e69b4"
     },
     {
       "distro_name": "ubuntu",
       "distro_version": "jammy",
       "compiler_name": "gcc",
-      "compiler_version": "12"
+      "compiler_version": "12",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "ubuntu",
       "distro_version": "noble",
       "compiler_name": "gcc",
-      "compiler_version": "13"
+      "compiler_version": "13",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "ubuntu",
       "distro_version": "noble",
       "compiler_name": "gcc",
-      "compiler_version": "14"
+      "compiler_version": "14",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "ubuntu",
       "distro_version": "noble",
       "compiler_name": "clang",
-      "compiler_version": "16"
+      "compiler_version": "16",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "ubuntu",
       "distro_version": "noble",
       "compiler_name": "clang",
-      "compiler_version": "17"
+      "compiler_version": "17",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "ubuntu",
       "distro_version": "noble",
       "compiler_name": "clang",
-      "compiler_version": "18"
+      "compiler_version": "18",
+      "image_sha": "6948666"
     },
     {
       "distro_name": "ubuntu",
       "distro_version": "noble",
       "compiler_name": "clang",
-      "compiler_version": "19"
+      "compiler_version": "19",
+      "image_sha": "6948666"
     }
   ],
   "build_type": ["Debug", "Release"],

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

@@ -10,7 +10,8 @@
       "distro_name": "macos",
       "distro_version": "",
       "compiler_name": "",
-      "compiler_version": ""
+      "compiler_version": "",
+      "image_sha": ""
     }
   ],
   "build_type": ["Debug", "Release"],

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

@@ -10,7 +10,8 @@
       "distro_name": "windows",
       "distro_version": "",
       "compiler_name": "",
-      "compiler_version": ""
+      "compiler_version": "",
+      "image_sha": ""
     }
   ],
   "build_type": ["Debug", "Release"],

.github/workflows/on-pr.yml

@@ -103,6 +103,7 @@ jobs:
     if: ${{ needs.should-run.outputs.go == 'true' }}
     uses: ./.github/workflows/reusable-build-test.yml
     strategy:
+      fail-fast: false
       matrix:
         os: [linux, macos, windows]
     with:

.github/workflows/on-trigger.yml

@@ -9,9 +9,9 @@ name: Trigger
 on:
   push:
     branches:
-      - develop
-      - release
-      - master
+      - "develop"
+      - "release*"
+      - "master"
     paths:
       # These paths are unique to `on-trigger.yml`.
       - ".github/workflows/reusable-check-missing-commits.yml"
@@ -50,7 +50,12 @@ on:
   workflow_dispatch:
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
+  # When a PR is merged into the develop branch it will be assigned a unique
+  # group identifier, so execution will continue even if another PR is merged
+  # while it is still running. In all other cases the group identifier is shared
+  # per branch, so that any in-progress runs are cancelled when a new commit is
+  # pushed.
+  group: ${{ github.workflow }}-${{ github.event_name == 'push' && github.ref == 'refs/heads/develop' && github.sha || github.ref }}
   cancel-in-progress: true
 
 defaults:
@@ -65,6 +70,7 @@ jobs:
   build-test:
     uses: ./.github/workflows/reusable-build-test.yml
     strategy:
+      fail-fast: ${{ github.event_name == 'merge_group' }}
       matrix:
         os: [linux, macos, windows]
     with:

.github/workflows/pre-commit.yml

@@ -9,7 +9,7 @@ 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@af1b0f0d764cda2e5435f5ac97b240d4bd4d95d3
+    uses: XRPLF/actions/.github/workflows/pre-commit.yml@34790936fae4c6c751f62ec8c06696f9c1a5753a
     with:
       runs_on: ubuntu-latest
-      container: '{ "image": "ghcr.io/xrplf/ci/tools-rippled-pre-commit:sha-d1496b8" }'
+      container: '{ "image": "ghcr.io/xrplf/ci/tools-rippled-pre-commit:sha-a8c7be1" }'

.github/workflows/publish-docs.yml

@@ -23,16 +23,24 @@ defaults:
 
 env:
   BUILD_DIR: .build
+  NPROC_SUBTRACT: 2
 
 jobs:
   publish:
     runs-on: ubuntu-latest
-    container: ghcr.io/xrplf/ci/tools-rippled-documentation:sha-d1496b8
+    container: ghcr.io/xrplf/ci/tools-rippled-documentation:sha-a8c7be1
     permissions:
       contents: write
     steps:
       - name: Checkout repository
         uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+
+      - name: Get number of processors
+        uses: XRPLF/actions/.github/actions/get-nproc@046b1620f6bfd6cd0985dc82c3df02786801fe0a
+        id: nproc
+        with:
+          subtract: ${{ env.NPROC_SUBTRACT }}
+
       - name: Check configuration
         run: |
           echo 'Checking path.'
@@ -46,12 +54,16 @@ jobs:
 
           echo 'Checking Doxygen version.'
           doxygen --version
+
       - name: Build documentation
+        env:
+          BUILD_NPROC: ${{ steps.nproc.outputs.nproc }}
         run: |
-          mkdir -p ${{ env.BUILD_DIR }}
-          cd ${{ env.BUILD_DIR }}
+          mkdir -p "${BUILD_DIR}"
+          cd "${BUILD_DIR}"
           cmake -Donly_docs=ON ..
-          cmake --build . --target docs --parallel $(nproc)
+          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

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

@@ -39,6 +39,12 @@ on:
         required: true
         type: string
 
+      nproc_subtract:
+        description: "The number of processors to subtract when calculating parallelism."
+        required: false
+        type: number
+        default: 2
+
     secrets:
       CODECOV_TOKEN:
         description: "The Codecov token to use for uploading coverage reports."
@@ -55,6 +61,7 @@ jobs:
       runs_on: ${{ inputs.runs_on }}
       image: ${{ inputs.image }}
       config_name: ${{ inputs.config_name }}
+      nproc_subtract: ${{ inputs.nproc_subtract }}
     secrets:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
 
@@ -67,3 +74,4 @@ jobs:
       runs_on: ${{ inputs.runs_on }}
       image: ${{ inputs.image }}
       config_name: ${{ inputs.config_name }}
+      nproc_subtract: ${{ inputs.nproc_subtract }}

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

@@ -42,7 +42,7 @@ jobs:
       - generate-matrix
     uses: ./.github/workflows/reusable-build-test-config.yml
     strategy:
-      fail-fast: false
+      fail-fast: ${{ github.event_name == 'merge_group' }}
       matrix: ${{ fromJson(needs.generate-matrix.outputs.matrix) }}
       max-parallel: 10
     with:
@@ -52,7 +52,7 @@ jobs:
       cmake_args: ${{ matrix.cmake_args }}
       cmake_target: ${{ matrix.cmake_target }}
       runs_on: ${{ toJSON(matrix.architecture.runner) }}
-      image: ${{ contains(matrix.architecture.platform, 'linux') && format('ghcr.io/xrplf/ci/{0}-{1}:{2}-{3}-sha-5dd7158', matrix.os.distro_name, matrix.os.distro_version, matrix.os.compiler_name, matrix.os.compiler_version) || '' }}
+      image: ${{ contains(matrix.architecture.platform, 'linux') && format('ghcr.io/xrplf/ci/{0}-{1}:{2}-{3}-sha-{4}', matrix.os.distro_name, matrix.os.distro_version, matrix.os.compiler_name, matrix.os.compiler_version, matrix.os.image_sha) || '' }}
       config_name: ${{ matrix.config_name }}
     secrets:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/reusable-build.yml

@@ -34,6 +34,11 @@ on:
         required: true
         type: string
 
+      nproc_subtract:
+        description: "The number of processors to subtract when calculating parallelism."
+        required: true
+        type: number
+
     secrets:
       CODECOV_TOKEN:
         description: "The Codecov token to use for uploading coverage reports."
@@ -48,6 +53,7 @@ jobs:
     name: Build ${{ inputs.config_name }}
     runs-on: ${{ fromJSON(inputs.runs_on) }}
     container: ${{ inputs.image != '' && inputs.image || null }}
+    timeout-minutes: 60
     steps:
       - name: Cleanup workspace
         if: ${{ runner.os == 'macOS' }}
@@ -57,13 +63,19 @@ jobs:
         uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
 
       - name: Prepare runner
-        uses: XRPLF/actions/.github/actions/prepare-runner@638e0dc11ea230f91bd26622fb542116bb5254d5
+        uses: XRPLF/actions/.github/actions/prepare-runner@99685816bb60a95a66852f212f382580e180df3a
         with:
           disable_ccache: false
 
       - name: Print build environment
         uses: ./.github/actions/print-env
 
+      - name: Get number of processors
+        uses: XRPLF/actions/.github/actions/get-nproc@046b1620f6bfd6cd0985dc82c3df02786801fe0a
+        id: nproc
+        with:
+          subtract: ${{ inputs.nproc_subtract }}
+
       - name: Setup Conan
         uses: ./.github/actions/setup-conan
 
@@ -71,7 +83,11 @@ jobs:
         uses: ./.github/actions/build-deps
         with:
           build_dir: ${{ inputs.build_dir }}
+          build_nproc: ${{ steps.nproc.outputs.nproc }}
           build_type: ${{ inputs.build_type }}
+          # 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' }}
 
       - name: Configure CMake
         shell: bash
@@ -83,33 +99,50 @@ jobs:
           cmake \
             -G '${{ runner.os == 'Windows' && 'Visual Studio 17 2022' || 'Ninja' }}' \
             -DCMAKE_TOOLCHAIN_FILE:FILEPATH=build/generators/conan_toolchain.cmake \
-            -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }} \
-            ${{ env.CMAKE_ARGS }} \
+            -DCMAKE_BUILD_TYPE="${BUILD_TYPE}" \
+            ${CMAKE_ARGS} \
             ..
 
       - name: Build the binary
         shell: bash
         working-directory: ${{ inputs.build_dir }}
         env:
+          BUILD_NPROC: ${{ steps.nproc.outputs.nproc }}
           BUILD_TYPE: ${{ inputs.build_type }}
           CMAKE_TARGET: ${{ inputs.cmake_target }}
         run: |
           cmake \
             --build . \
-            --config ${{ env.BUILD_TYPE }} \
-            --parallel $(nproc) \
-            --target ${{ env.CMAKE_TARGET }}
+            --config "${BUILD_TYPE}" \
+            --parallel ${BUILD_NPROC} \
+            --target "${CMAKE_TARGET}"
+
+      - name: Put built binaries in one location
+        shell: bash
+        working-directory: ${{ inputs.build_dir }}
+        env:
+          BUILD_TYPE_DIR: ${{ runner.os == 'Windows' && inputs.build_type || '' }}
+          CMAKE_TARGET: ${{ inputs.cmake_target }}
+        run: |
+          mkdir -p ./binaries/doctest/
+
+          cp ./${BUILD_TYPE_DIR}/rippled* ./binaries/
+          if [ "${CMAKE_TARGET}" != 'coverage' ]; then
+            cp ./src/tests/libxrpl/${BUILD_TYPE_DIR}/xrpl.test.* ./binaries/doctest/
+          fi
 
       - name: Upload rippled artifact
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
+        env:
+          BUILD_DIR: ${{ inputs.build_dir }}
         with:
           name: rippled-${{ inputs.config_name }}
-          path: ${{ inputs.build_dir }}/${{ runner.os == 'Windows' && inputs.build_type || '' }}/rippled${{ runner.os == 'Windows' && '.exe' || '' }}
+          path: ${{ env.BUILD_DIR }}/binaries/
           retention-days: 3
           if-no-files-found: error
 
       - name: Upload coverage report
-        if: ${{ inputs.cmake_target == 'coverage' }}
+        if: ${{ github.repository_owner == 'XRPLF' && inputs.cmake_target == 'coverage' }}
         uses: codecov/codecov-action@18283e04ce6e62d37312384ff67231eb8fd56d24 # v5.4.3
         with:
           disable_search: true

.github/workflows/reusable-notify-clio.yml

@@ -51,7 +51,7 @@ jobs:
         run: |
           echo 'Generating user and channel.'
           echo "user=clio" >> "${GITHUB_OUTPUT}"
-          echo "channel=pr_${{ env.PR_NUMBER }}" >> "${GITHUB_OUTPUT}"
+          echo "channel=pr_${PR_NUMBER}" >> "${GITHUB_OUTPUT}"
           echo 'Extracting version.'
           echo "version=$(cat src/libxrpl/protocol/BuildInfo.cpp | grep "versionString =" | awk -F '"' '{print $2}')" >> "${GITHUB_OUTPUT}"
       - name: Calculate conan reference
@@ -64,13 +64,15 @@ jobs:
           conan_remote_name: ${{ inputs.conan_remote_name }}
           conan_remote_url: ${{ inputs.conan_remote_url }}
       - name: Log into Conan remote
-        run: conan remote login ${{ inputs.conan_remote_name }} "${{ secrets.conan_remote_username }}" --password "${{ secrets.conan_remote_password }}"
+        env:
+          CONAN_REMOTE_NAME: ${{ inputs.conan_remote_name }}
+        run: conan remote login "${CONAN_REMOTE_NAME}" "${{ secrets.conan_remote_username }}" --password "${{ secrets.conan_remote_password }}"
       - name: Upload package
         env:
           CONAN_REMOTE_NAME: ${{ inputs.conan_remote_name }}
         run: |
           conan export --user=${{ steps.generate.outputs.user }} --channel=${{ steps.generate.outputs.channel }} .
-          conan upload --confirm --check --remote=${{ env.CONAN_REMOTE_NAME }} xrpl/${{ steps.conan_ref.outputs.conan_ref }}
+          conan upload --confirm --check --remote="${CONAN_REMOTE_NAME}" xrpl/${{ steps.conan_ref.outputs.conan_ref }}
     outputs:
       conan_ref: ${{ steps.conan_ref.outputs.conan_ref }}
 
@@ -86,4 +88,4 @@ jobs:
           gh api --method POST -H "Accept: application/vnd.github+json" -H "X-GitHub-Api-Version: 2022-11-28" \
           /repos/xrplf/clio/dispatches -f "event_type=check_libxrpl" \
           -F "client_payload[conan_ref]=${{ needs.upload.outputs.conan_ref }}" \
-          -F "client_payload[pr_url]=${{ env.PR_URL }}"
+          -F "client_payload[pr_url]=${PR_URL}"

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

@@ -38,4 +38,4 @@ jobs:
         env:
           GENERATE_CONFIG: ${{ inputs.os != '' && format('--config={0}.json', inputs.os) || '' }}
           GENERATE_OPTION: ${{ inputs.strategy_matrix == 'all' && '--all' || '' }}
-        run: ./generate.py ${{ env.GENERATE_OPTION }} ${{ env.GENERATE_CONFIG }} >> "${GITHUB_OUTPUT}"
+        run: ./generate.py ${GENERATE_OPTION} ${GENERATE_CONFIG} >> "${GITHUB_OUTPUT}"

.github/workflows/reusable-test.yml

@@ -26,12 +26,28 @@ on:
         required: true
         type: string
 
+      nproc_subtract:
+        description: "The number of processors to subtract when calculating parallelism."
+        required: true
+        type: number
+
 jobs:
   test:
     name: Test ${{ inputs.config_name }}
     runs-on: ${{ fromJSON(inputs.runs_on) }}
     container: ${{ inputs.image != '' && inputs.image || null }}
+    timeout-minutes: 30
     steps:
+      - name: Cleanup workspace
+        if: ${{ runner.os == 'macOS' }}
+        uses: XRPLF/actions/.github/actions/cleanup-workspace@3f044c7478548e3c32ff68980eeb36ece02b364e
+
+      - name: Get number of processors
+        uses: XRPLF/actions/.github/actions/get-nproc@046b1620f6bfd6cd0985dc82c3df02786801fe0a
+        id: nproc
+        with:
+          subtract: ${{ inputs.nproc_subtract }}
+
       - name: Download rippled artifact
         uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
@@ -61,9 +77,35 @@ jobs:
         run: |
           ./rippled --version | grep libvoidstar
 
-      - name: Test the binary
+      - name: Run the embedded tests
         if: ${{ inputs.run_tests }}
         shell: bash
+        env:
+          BUILD_NPROC: ${{ steps.nproc.outputs.nproc }}
         run: |
-          ./rippled --unittest --unittest-jobs $(nproc)
-          ctest -j $(nproc) --output-on-failure
+          ./rippled --unittest --unittest-jobs ${BUILD_NPROC}
+
+      - name: Run the separate tests
+        if: ${{ inputs.run_tests }}
+        env:
+          EXT: ${{ runner.os == 'Windows' && '.exe' || '' }}
+        shell: bash
+        run: |
+          for test_file in ./doctest/*${EXT}; do
+            echo "Executing $test_file"
+            chmod +x "$test_file"
+            if [[ "${{ runner.os }}" == "Windows" && "$test_file" == "./doctest/xrpl.test.net.exe" ]]; then
+              echo "Skipping $test_file on Windows"
+            else
+              "$test_file"
+            fi
+          done
+
+      - name: Debug failure (Linux)
+        if: ${{ failure() && runner.os == 'Linux' && inputs.run_tests }}
+        shell: bash
+        run: |
+          echo "IPv4 local port range:"
+          cat /proc/sys/net/ipv4/ip_local_port_range
+          echo "Netstat:"
+          netstat -an

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

@@ -34,17 +34,20 @@ on:
 env:
   CONAN_REMOTE_NAME: xrplf
   CONAN_REMOTE_URL: https://conan.ripplex.io
+  NPROC_SUBTRACT: 2
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
 jobs:
+  # Generate the strategy matrix to be used by the following job.
   generate-matrix:
     uses: ./.github/workflows/reusable-strategy-matrix.yml
     with:
       strategy_matrix: ${{ github.event_name == 'pull_request' && 'minimal' || 'all' }}
 
+  # Build and upload the dependencies for each configuration.
   run-upload-conan-deps:
     needs:
       - generate-matrix
@@ -53,19 +56,29 @@ jobs:
       matrix: ${{ fromJson(needs.generate-matrix.outputs.matrix) }}
       max-parallel: 10
     runs-on: ${{ matrix.architecture.runner }}
-    container: ${{ contains(matrix.architecture.platform, 'linux') && format('ghcr.io/xrplf/ci/{0}-{1}:{2}-{3}-sha-5dd7158', matrix.os.distro_name, matrix.os.distro_version, matrix.os.compiler_name, matrix.os.compiler_version) || null }}
-
+    container: ${{ contains(matrix.architecture.platform, 'linux') && format('ghcr.io/xrplf/ci/{0}-{1}:{2}-{3}-sha-{4}', matrix.os.distro_name, matrix.os.distro_version, matrix.os.compiler_name, matrix.os.compiler_version, matrix.os.image_sha) || null }}
     steps:
       - name: Cleanup workspace
         if: ${{ runner.os == 'macOS' }}
         uses: XRPLF/actions/.github/actions/cleanup-workspace@3f044c7478548e3c32ff68980eeb36ece02b364e
 
-      - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+      - name: Checkout repository
+        uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
+
       - name: Prepare runner
-        uses: XRPLF/actions/.github/actions/prepare-runner@638e0dc11ea230f91bd26622fb542116bb5254d5
+        uses: XRPLF/actions/.github/actions/prepare-runner@99685816bb60a95a66852f212f382580e180df3a
         with:
           disable_ccache: false
 
+      - name: Print build environment
+        uses: ./.github/actions/print-env
+
+      - name: Get number of processors
+        uses: XRPLF/actions/.github/actions/get-nproc@046b1620f6bfd6cd0985dc82c3df02786801fe0a
+        id: nproc
+        with:
+          subtract: ${{ env.NPROC_SUBTRACT }}
+
       - name: Setup Conan
         uses: ./.github/actions/setup-conan
         with:
@@ -76,15 +89,19 @@ jobs:
         uses: ./.github/actions/build-deps
         with:
           build_dir: .build
+          build_nproc: ${{ steps.nproc.outputs.nproc }}
           build_type: ${{ matrix.build_type }}
           force_build: ${{ github.event_name == 'schedule' || github.event.inputs.force_source_build == 'true' }}
+          # 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' }}
 
       - name: Log into Conan remote
-        if: ${{ github.repository_owner == 'XRPLF' && github.event_name != 'pull_request' }}
-        run: conan remote login ${{ env.CONAN_REMOTE_NAME }} "${{ secrets.CONAN_REMOTE_USERNAME }}" --password "${{ secrets.CONAN_REMOTE_PASSWORD }}"
+        if: ${{ github.repository_owner == 'XRPLF' && (github.event_name == 'push' || github.event_name == 'workflow_dispatch') }}
+        run: conan remote login "${CONAN_REMOTE_NAME}" "${{ secrets.CONAN_REMOTE_USERNAME }}" --password "${{ secrets.CONAN_REMOTE_PASSWORD }}"
 
       - name: Upload Conan packages
-        if: ${{ github.repository_owner == 'XRPLF' && github.event_name != 'pull_request' && github.event_name != 'schedule' }}
+        if: ${{ github.repository_owner == 'XRPLF' && (github.event_name == 'push' || github.event_name == 'workflow_dispatch') }}
         env:
           FORCE_OPTION: ${{ github.event.inputs.force_upload == 'true' && '--force' || '' }}
-        run: conan upload "*" --remote='${{ env.CONAN_REMOTE_NAME }}' --confirm ${{ env.FORCE_OPTION }}
+        run: conan upload "*" --remote="${CONAN_REMOTE_NAME}" --confirm ${FORCE_OPTION}

BUILD.md

@@ -39,17 +39,12 @@ found here](./docs/build/environment.md).
 
 - [Python 3.11](https://www.python.org/downloads/), or higher
 - [Conan 2.17](https://conan.io/downloads.html)[^1], or higher
-- [CMake 3.22](https://cmake.org/download/)[^2], or higher
+- [CMake 3.22](https://cmake.org/download/), or higher
 
 [^1]:
     It is possible to build with Conan 1.60+, but the instructions are
     significantly different, which is why we are not recommending it.
 
-[^2]:
-    CMake 4 is not yet supported by all dependencies required by this project.
-    If you are affected by this issue, follow [conan workaround for cmake
-    4](#workaround-for-cmake-4)
-
 `rippled` is written in the C++20 dialect and includes the `<concepts>` header.
 The [minimum compiler versions][2] required are:
 
@@ -282,21 +277,6 @@ sed -i.bak -e 's|^arch=.*$|arch=x86_64|' $(conan config home)/profiles/default
 sed -i.bak -e 's|^compiler\.runtime=.*$|compiler.runtime=static|' $(conan config home)/profiles/default
 ```
 
-#### Workaround for CMake 4
-
-If your system CMake is version 4 rather than 3, you may have to configure Conan
-profile to use CMake version 3 for dependencies, by adding the following two
-lines to your profile:
-
-```text
-[tool_requires]
-!cmake/*: cmake/[>=3 <4]
-```
-
-This will force Conan to download and use a locally cached CMake 3 version, and
-is needed because some of the dependencies used by this project do not support
-CMake 4.
-
 #### Clang workaround for grpc
 
 If your compiler is clang, version 19 or later, or apple-clang, version 17 or

cfg/rippled-example.cfg

@@ -975,6 +975,47 @@
 #                           number of ledger records online. Must be greater
 #                           than or equal to ledger_history.
 #
+#   Optional keys for NuDB only:
+#
+#       nudb_block_size     EXPERIMENTAL: Block size in bytes for NuDB storage.
+#                           Must be a power of 2 between 4096 and 32768. Default is 4096.
+#
+#                           This parameter controls the fundamental storage unit
+#                           size for NuDB's internal data structures. The choice
+#                           of block size can significantly impact performance
+#                           depending on your storage hardware and filesystem:
+#
+#                           - 4096 bytes: Optimal for most standard SSDs and
+#                             traditional filesystems (ext4, NTFS, HFS+).
+#                             Provides good balance of performance and storage
+#                             efficiency. Recommended for most deployments.
+#                             Minimizes memory footprint and provides consistent
+#                             low-latency access patterns across diverse hardware.
+#
+#                           - 8192-16384 bytes: May improve performance on
+#                             high-end NVMe SSDs and copy-on-write filesystems
+#                             like ZFS or Btrfs that benefit from larger block
+#                             alignment. Can reduce metadata overhead for large
+#                             databases. Offers better sequential throughput and
+#                             reduced I/O operations at the cost of higher memory
+#                             usage per operation.
+#
+#                           - 32768 bytes (32K): Maximum supported block size
+#                             for high-performance scenarios with very fast
+#                             storage. May increase memory usage and reduce
+#                             efficiency for smaller databases. Best suited for
+#                             enterprise environments with abundant RAM.
+#
+#                           Performance testing is recommended before deploying
+#                           any non-default block size in production environments.
+#
+#                           Note: This setting cannot be changed after database
+#                           creation without rebuilding the entire database.
+#                           Choose carefully based on your hardware and expected
+#                           database size.
+#
+#                           Example: nudb_block_size=4096
+#
 #       These keys modify the behavior of online_delete, and thus are only
 #       relevant if online_delete is defined and non-zero:
 #
@@ -1471,6 +1512,7 @@ secure_gateway = 127.0.0.1
 [node_db]
 type=NuDB
 path=/var/lib/rippled/db/nudb
+nudb_block_size=4096
 online_delete=512
 advisory_delete=0
 

cmake/RippleConfig.cmake

@@ -45,7 +45,7 @@ if (static OR APPLE OR MSVC)
   set (OPENSSL_USE_STATIC_LIBS ON)
 endif ()
 set (OPENSSL_MSVC_STATIC_RT ON)
-find_dependency (OpenSSL 1.1.1 REQUIRED)
+find_dependency (OpenSSL REQUIRED)
 find_dependency (ZLIB)
 find_dependency (date)
 if (TARGET ZLIB::ZLIB)

cmake/RippledCompiler.cmake

@@ -16,13 +16,16 @@ set(CMAKE_CXX_EXTENSIONS OFF)
 target_compile_definitions (common
   INTERFACE
     $<$<CONFIG:Debug>:DEBUG _DEBUG>
-    $<$<AND:$<BOOL:${profile}>,$<NOT:$<BOOL:${assert}>>>:NDEBUG>)
-    # ^^^^ NOTE: CMAKE release builds already have NDEBUG
-    # defined, so no need to add it explicitly except for
-    # this special case of (profile ON) and (assert OFF)
-    # -- presumably this is because we don't want profile
-    # builds asserting unless asserts were specifically
-    # requested
+    #[===[
+    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
+)
 
 if (MSVC)
   # remove existing exception flag since we set it to -EHa

cmake/RippledCore.cmake

@@ -53,14 +53,15 @@ add_library(xrpl.imports.main INTERFACE)
 
 target_link_libraries(xrpl.imports.main
   INTERFACE
-    LibArchive::LibArchive
-    OpenSSL::Crypto
-    Ripple::boost
-    Ripple::opts
-    Ripple::syslibs
     absl::random_random
     date::date
     ed25519::ed25519
+    LibArchive::LibArchive
+    OpenSSL::Crypto
+    Ripple::boost
+    Ripple::libs
+    Ripple::opts
+    Ripple::syslibs
     secp256k1::secp256k1
     xrpl.libpb
     xxHash::xxhash
@@ -111,6 +112,21 @@ target_link_libraries(xrpl.libxrpl.net PUBLIC
 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
+        xrpl.libxrpl.basics
+        xrpl.libxrpl.json
+        xrpl.libxrpl.protocol
+)
+
+add_module(xrpl shamap)
+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
@@ -136,6 +152,8 @@ target_link_modules(xrpl PUBLIC
   protocol
   resource
   server
+  nodestore
+  shamap
   net
   ledger
 )

cmake/RippledInstall.cmake

@@ -8,20 +8,23 @@ install (
   TARGETS
     common
     opts
-    ripple_syslibs
     ripple_boost
+    ripple_libs
+    ripple_syslibs
     xrpl.imports.main
     xrpl.libpb
+    xrpl.libxrpl
     xrpl.libxrpl.basics
     xrpl.libxrpl.beast
     xrpl.libxrpl.crypto
     xrpl.libxrpl.json
+    xrpl.libxrpl.ledger
+    xrpl.libxrpl.net
+    xrpl.libxrpl.nodestore
     xrpl.libxrpl.protocol
     xrpl.libxrpl.resource
-    xrpl.libxrpl.ledger
     xrpl.libxrpl.server
-    xrpl.libxrpl.net
-    xrpl.libxrpl
+    xrpl.libxrpl.shamap
     antithesis-sdk-cpp
   EXPORT RippleExports
   LIBRARY DESTINATION lib
@@ -38,7 +41,7 @@ install(CODE "
   set(CMAKE_MODULE_PATH \"${CMAKE_MODULE_PATH}\")
   include(create_symbolic_link)
   create_symbolic_link(xrpl \
-    \${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}/ripple)
+    \$ENV{DESTDIR}\${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}/ripple)
 ")
 
 install (EXPORT RippleExports
@@ -72,7 +75,7 @@ if (is_root_project AND TARGET rippled)
     set(CMAKE_MODULE_PATH \"${CMAKE_MODULE_PATH}\")
     include(create_symbolic_link)
     create_symbolic_link(rippled${suffix} \
-      \${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/xrpld${suffix})
+       \$ENV{DESTDIR}\${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}/xrpld${suffix})
   ")
 endif ()
 

cmake/RippledValidatorKeys.cmake

@@ -1,4 +1,4 @@
-option (validator_keys "Enables building of validator-keys-tool as a separate target (imported via FetchContent)" OFF)
+option (validator_keys "Enables building of validator-keys tool as a separate target (imported via FetchContent)" OFF)
 
 if (validator_keys)
   git_branch (current_branch)
@@ -6,17 +6,15 @@ if (validator_keys)
   if (NOT (current_branch STREQUAL "release"))
     set (current_branch "master")
   endif ()
-  message (STATUS "tracking ValidatorKeys branch: ${current_branch}")
+  message (STATUS "Tracking ValidatorKeys branch: ${current_branch}")
 
   FetchContent_Declare (
-    validator_keys_src
+    validator_keys
     GIT_REPOSITORY https://github.com/ripple/validator-keys-tool.git
     GIT_TAG        "${current_branch}"
   )
-  FetchContent_GetProperties (validator_keys_src)
-  if (NOT validator_keys_src_POPULATED)
-    message (STATUS "Pausing to download ValidatorKeys...")
-    FetchContent_Populate (validator_keys_src)
-  endif ()
-  add_subdirectory (${validator_keys_src_SOURCE_DIR} ${CMAKE_BINARY_DIR}/validator-keys)
+  FetchContent_MakeAvailable(validator_keys)
+  set_target_properties(validator-keys PROPERTIES RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}")
+  install(TARGETS validator-keys RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+
 endif ()

cmake/xrpl_add_test.cmake

@@ -7,7 +7,7 @@ function(xrpl_add_test name)
   "${CMAKE_CURRENT_SOURCE_DIR}/${name}/*.cpp"
   "${CMAKE_CURRENT_SOURCE_DIR}/${name}.cpp"
   )
-  add_executable(${target} EXCLUDE_FROM_ALL ${ARGN} ${sources})
+  add_executable(${target} ${ARGN} ${sources})
 
   isolate_headers(
     ${target}

conan.lock

@@ -9,7 +9,7 @@
         "rocksdb/10.0.1#85537f46e538974d67da0c3977de48ac%1756234304.347",
         "re2/20230301#dfd6e2bf050eb90ddd8729cfb4c844a4%1756234257.976",
         "protobuf/3.21.12#d927114e28de9f4691a6bbcdd9a529d1%1756234251.614",
-        "openssl/1.1.1w#a8f0792d7c5121b954578a7149d23e03%1756223730.729",
+        "openssl/3.5.4#a1d5835cc6ed5c5b8f3cd5b9b5d24205%1759746684.671",
         "nudb/2.0.9#c62cfd501e57055a7e0d8ee3d5e5427d%1756234237.107",
         "lz4/1.10.0#59fc63cac7f10fbe8e05c7e62c2f3504%1756234228.999",
         "libiconv/1.17#1e65319e945f2d31941a9d28cc13c058%1756223727.64",

conan/global.conf

@@ -1,9 +1,5 @@
 # Global configuration for Conan. This is used to set the number of parallel
-# downloads, uploads, and build jobs. The verbosity is set to verbose to
-# provide more information during the build process.
+# downloads and uploads.
 core:non_interactive=True
 core.download:parallel={{ os.cpu_count() }}
 core.upload:parallel={{ os.cpu_count() }}
-tools.build:jobs={{ (os.cpu_count() * 4/5) | int }}
-tools.build:verbosity=verbose
-tools.compilation:verbosity=verbose

conan/profiles/default

@@ -21,14 +21,11 @@ compiler.libcxx={{detect_api.detect_libcxx(compiler, version, compiler_exe)}}
 
 [conf]
 {% if compiler == "clang" and compiler_version >= 19 %}
-tools.build:cxxflags=['-Wno-missing-template-arg-list-after-template-kw']
+grpc/1.50.1:tools.build:cxxflags+=['-Wno-missing-template-arg-list-after-template-kw']
 {% endif %}
 {% if compiler == "apple-clang" and compiler_version >= 17 %}
-tools.build:cxxflags=['-Wno-missing-template-arg-list-after-template-kw']
+grpc/1.50.1:tools.build:cxxflags+=['-Wno-missing-template-arg-list-after-template-kw']
 {% endif %}
 {% if compiler == "gcc" and compiler_version < 13 %}
-tools.build:cxxflags=['-Wno-restrict']
+tools.build:cxxflags+=['-Wno-restrict']
 {% endif %}
-
-[tool_requires]
-!cmake/*: cmake/[>=3 <4]

conanfile.py

@@ -27,7 +27,7 @@ class Xrpl(ConanFile):
         'grpc/1.50.1',
         'libarchive/3.8.1',
         'nudb/2.0.9',
-        'openssl/1.1.1w',
+        'openssl/3.5.4',
         'soci/4.0.3',
         'zlib/1.3.1',
     ]

include/xrpl/basics/IntrusivePointer.ipp

@@ -654,12 +654,14 @@ SharedWeakUnion<T>::convertToWeak()
             break;
         case destroy:
             // We just added a weak ref. How could we destroy?
+            // LCOV_EXCL_START
             UNREACHABLE(
                 "ripple::SharedWeakUnion::convertToWeak : destroying freshly "
                 "added ref");
             delete p;
             unsafeSetRawPtr(nullptr);
             return true;  // Should never happen
+            // LCOV_EXCL_STOP
         case partialDestroy:
             // This is a weird case. We just converted the last strong
             // pointer to a weak pointer.

include/xrpl/basics/TaggedCache.h

@@ -170,9 +170,6 @@ public:
     bool
     retrieve(key_type const& key, T& data);
 
-    mutex_type&
-    peekMutex();
-
     std::vector<key_type>
     getKeys() const;
 

include/xrpl/basics/TaggedCache.ipp

@@ -668,29 +668,6 @@ TaggedCache<
     return true;
 }
 
-template <
-    class Key,
-    class T,
-    bool IsKeyCache,
-    class SharedWeakUnionPointer,
-    class SharedPointerType,
-    class Hash,
-    class KeyEqual,
-    class Mutex>
-inline auto
-TaggedCache<
-    Key,
-    T,
-    IsKeyCache,
-    SharedWeakUnionPointer,
-    SharedPointerType,
-    Hash,
-    KeyEqual,
-    Mutex>::peekMutex() -> mutex_type&
-{
-    return m_mutex;
-}
-
 template <
     class Key,
     class T,

include/xrpl/beast/net/IPAddress.h

@@ -94,7 +94,11 @@ hash_append(Hasher& h, beast::IP::Address const& addr) noexcept
     else if (addr.is_v6())
         hash_append(h, addr.to_v6().to_bytes());
     else
+    {
+        // LCOV_EXCL_START
         UNREACHABLE("beast::hash_append : invalid address type");
+        // LCOV_EXCL_STOP
+    }
 }
 }  // namespace beast
 

include/xrpl/json/json_writer.h

@@ -46,7 +46,7 @@ public:
  * without formatting (not human friendly).
  *
  * The JSON document is written in a single line. It is not intended for 'human'
- * consumption, but may be useful to support feature such as RPC where bandwith
+ * consumption, but may be useful to support feature such as RPC where bandwidth
  * is limited. \sa Reader, Value
  */
 

include/xrpl/ledger/ApplyView.h

@@ -284,12 +284,14 @@ public:
     {
         if (key.type != ltOFFER)
         {
+            // LCOV_EXCL_START
             UNREACHABLE(
                 "ripple::ApplyView::dirAppend : only Offers are appended to "
                 "book directories");
             // Only Offers are appended to book directories. Call dirInsert()
             // instead
             return std::nullopt;
+            // LCOV_EXCL_STOP
         }
         return dirAdd(true, directory, key.key, describe);
     }

include/xrpl/ledger/LedgerIndexMap.h

@@ -0,0 +1,138 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2012, 2013 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF  USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#ifndef RIPPLE_APP_LEDGER_INDEX_MAP_H_INCLUDED
+#define RIPPLE_APP_LEDGER_INDEX_MAP_H_INCLUDED
+
+#include <algorithm>
+#include <mutex>
+#include <unordered_map>
+
+namespace ripple {
+
+template <class Key, class Mapped>
+class LedgerIndexMap
+{
+public:
+    LedgerIndexMap() = default;
+    explicit LedgerIndexMap(std::size_t reserve_capacity)
+    {
+        data_.reserve(reserve_capacity);
+    }
+
+    LedgerIndexMap(LedgerIndexMap const&) = delete;
+    LedgerIndexMap&
+    operator=(LedgerIndexMap const&) = delete;
+    LedgerIndexMap(LedgerIndexMap&&) = delete;
+    LedgerIndexMap&
+    operator=(LedgerIndexMap&&) = delete;
+
+    Mapped&
+    operator[](Key const& k)
+    {
+        std::lock_guard lock(mutex_);
+        return data_[k];
+    }
+
+    Mapped&
+    operator[](Key&& k)
+    {
+        std::lock_guard lock(mutex_);
+        return data_[std::move(k)];
+    }
+
+    [[nodiscard]] Mapped*
+    get(Key const& k)
+    {
+        std::lock_guard lock(mutex_);
+        auto it = data_.find(k);
+        return it == data_.end() ? nullptr : &it->second;
+    }
+
+    [[nodiscard]] Mapped const*
+    get(Key const& k) const
+    {
+        std::lock_guard lock(mutex_);
+        auto it = data_.find(k);
+        return it == data_.end() ? nullptr : &it->second;
+    }
+
+    template <class... Args>
+    Mapped&
+    put(Key const& k, Args&&... args)
+    {
+        std::lock_guard lock(mutex_);
+        auto [it, inserted] = data_.try_emplace(k, std::forward<Args>(args)...);
+        if (!inserted)
+            it->second = Mapped(std::forward<Args>(args)...);
+        return it->second;
+    }
+
+    bool
+    contains(Key const& k) const
+    {
+        std::lock_guard lock(mutex_);
+        return data_.find(k) != data_.end();
+    }
+
+    std::size_t
+    size() const noexcept
+    {
+        std::lock_guard lock(mutex_);
+        return data_.size();
+    }
+
+    bool
+    empty() const noexcept
+    {
+        std::lock_guard lock(mutex_);
+        return data_.empty();
+    }
+
+    void
+    reserve(std::size_t n)
+    {
+        std::lock_guard lock(mutex_);
+        data_.reserve(n);
+    }
+
+    void
+    rehash(std::size_t n)
+    {
+        std::lock_guard lock(mutex_);
+        data_.rehash(n);
+    }
+
+    std::size_t
+    eraseBefore(Key const& cutoff)
+    {
+        std::lock_guard lock(mutex_);
+        auto const before = data_.size();
+        std::erase_if(data_, [&](auto const& kv) { return kv.first < cutoff; });
+        return before - data_.size();
+    }
+
+private:
+    std::unordered_map<Key, Mapped> data_;
+    mutable std::mutex mutex_;
+};
+
+}  // namespace ripple
+
+#endif  // RIPPLE_APP_LEDGER_INDEX_MAP_H_INCLUDED

include/xrpl/nodestore/Backend.h

@@ -20,7 +20,7 @@
 #ifndef RIPPLE_NODESTORE_BACKEND_H_INCLUDED
 #define RIPPLE_NODESTORE_BACKEND_H_INCLUDED
 
-#include <xrpld/nodestore/Types.h>
+#include <xrpl/nodestore/Types.h>
 
 #include <cstdint>
 
@@ -53,6 +53,14 @@ public:
     virtual std::string
     getName() = 0;
 
+    /** Get the block size for backends that support it
+     */
+    virtual std::optional<std::size_t>
+    getBlockSize() const
+    {
+        return std::nullopt;
+    }
+
     /** Open the backend.
         @param createIfMissing Create the database files if necessary.
         This allows the caller to catch exceptions.

include/xrpl/nodestore/Database.h

@@ -20,13 +20,12 @@
 #ifndef RIPPLE_NODESTORE_DATABASE_H_INCLUDED
 #define RIPPLE_NODESTORE_DATABASE_H_INCLUDED
 
-#include <xrpld/nodestore/Backend.h>
-#include <xrpld/nodestore/NodeObject.h>
-#include <xrpld/nodestore/Scheduler.h>
-
 #include <xrpl/basics/BasicConfig.h>
 #include <xrpl/basics/Log.h>
 #include <xrpl/basics/TaggedCache.ipp>
+#include <xrpl/nodestore/Backend.h>
+#include <xrpl/nodestore/NodeObject.h>
+#include <xrpl/nodestore/Scheduler.h>
 #include <xrpl/protocol/SystemParameters.h>
 
 #include <condition_variable>

include/xrpl/nodestore/DatabaseRotating.h

@@ -20,7 +20,7 @@
 #ifndef RIPPLE_NODESTORE_DATABASEROTATING_H_INCLUDED
 #define RIPPLE_NODESTORE_DATABASEROTATING_H_INCLUDED
 
-#include <xrpld/nodestore/Database.h>
+#include <xrpl/nodestore/Database.h>
 
 namespace ripple {
 namespace NodeStore {

include/xrpl/nodestore/DummyScheduler.h

@@ -20,7 +20,7 @@
 #ifndef RIPPLE_NODESTORE_DUMMYSCHEDULER_H_INCLUDED
 #define RIPPLE_NODESTORE_DUMMYSCHEDULER_H_INCLUDED
 
-#include <xrpld/nodestore/Scheduler.h>
+#include <xrpl/nodestore/Scheduler.h>
 
 namespace ripple {
 namespace NodeStore {

include/xrpl/nodestore/Factory.h

@@ -20,11 +20,10 @@
 #ifndef RIPPLE_NODESTORE_FACTORY_H_INCLUDED
 #define RIPPLE_NODESTORE_FACTORY_H_INCLUDED
 
-#include <xrpld/nodestore/Backend.h>
-#include <xrpld/nodestore/Scheduler.h>
-
 #include <xrpl/basics/BasicConfig.h>
 #include <xrpl/beast/utility/Journal.h>
+#include <xrpl/nodestore/Backend.h>
+#include <xrpl/nodestore/Scheduler.h>
 
 #include <nudb/store.hpp>
 

include/xrpl/nodestore/Manager.h

@@ -20,8 +20,8 @@
 #ifndef RIPPLE_NODESTORE_MANAGER_H_INCLUDED
 #define RIPPLE_NODESTORE_MANAGER_H_INCLUDED
 
-#include <xrpld/nodestore/DatabaseRotating.h>
-#include <xrpld/nodestore/Factory.h>
+#include <xrpl/nodestore/DatabaseRotating.h>
+#include <xrpl/nodestore/Factory.h>
 
 namespace ripple {
 

include/xrpl/nodestore/Scheduler.h

@@ -20,7 +20,7 @@
 #ifndef RIPPLE_NODESTORE_SCHEDULER_H_INCLUDED
 #define RIPPLE_NODESTORE_SCHEDULER_H_INCLUDED
 
-#include <xrpld/nodestore/Task.h>
+#include <xrpl/nodestore/Task.h>
 
 #include <chrono>
 

include/xrpl/nodestore/Types.h

@@ -20,7 +20,7 @@
 #ifndef RIPPLE_NODESTORE_TYPES_H_INCLUDED
 #define RIPPLE_NODESTORE_TYPES_H_INCLUDED
 
-#include <xrpld/nodestore/NodeObject.h>
+#include <xrpl/nodestore/NodeObject.h>
 
 #include <vector>
 

include/xrpl/nodestore/detail/BatchWriter.h

@@ -20,9 +20,9 @@
 #ifndef RIPPLE_NODESTORE_BATCHWRITER_H_INCLUDED
 #define RIPPLE_NODESTORE_BATCHWRITER_H_INCLUDED
 
-#include <xrpld/nodestore/Scheduler.h>
-#include <xrpld/nodestore/Task.h>
-#include <xrpld/nodestore/Types.h>
+#include <xrpl/nodestore/Scheduler.h>
+#include <xrpl/nodestore/Task.h>
+#include <xrpl/nodestore/Types.h>
 
 #include <condition_variable>
 #include <mutex>

include/xrpl/nodestore/detail/DatabaseNodeImp.h

@@ -20,10 +20,9 @@
 #ifndef RIPPLE_NODESTORE_DATABASENODEIMP_H_INCLUDED
 #define RIPPLE_NODESTORE_DATABASENODEIMP_H_INCLUDED
 
-#include <xrpld/nodestore/Database.h>
-
 #include <xrpl/basics/TaggedCache.h>
 #include <xrpl/basics/chrono.h>
+#include <xrpl/nodestore/Database.h>
 
 namespace ripple {
 namespace NodeStore {

include/xrpl/nodestore/detail/DatabaseRotatingImp.h

@@ -20,7 +20,7 @@
 #ifndef RIPPLE_NODESTORE_DATABASEROTATINGIMP_H_INCLUDED
 #define RIPPLE_NODESTORE_DATABASEROTATINGIMP_H_INCLUDED
 
-#include <xrpld/nodestore/DatabaseRotating.h>
+#include <xrpl/nodestore/DatabaseRotating.h>
 
 #include <mutex>
 

include/xrpl/nodestore/detail/DecodedBlob.h

@@ -20,7 +20,7 @@
 #ifndef RIPPLE_NODESTORE_DECODEDBLOB_H_INCLUDED
 #define RIPPLE_NODESTORE_DECODEDBLOB_H_INCLUDED
 
-#include <xrpld/nodestore/NodeObject.h>
+#include <xrpl/nodestore/NodeObject.h>
 
 namespace ripple {
 namespace NodeStore {

include/xrpl/nodestore/detail/EncodedBlob.h

@@ -20,9 +20,8 @@
 #ifndef RIPPLE_NODESTORE_ENCODEDBLOB_H_INCLUDED
 #define RIPPLE_NODESTORE_ENCODEDBLOB_H_INCLUDED
 
-#include <xrpld/nodestore/NodeObject.h>
-
 #include <xrpl/beast/utility/instrumentation.h>
+#include <xrpl/nodestore/NodeObject.h>
 
 #include <boost/align/align_up.hpp>
 

include/xrpl/nodestore/detail/ManagerImp.h

@@ -20,7 +20,7 @@
 #ifndef RIPPLE_NODESTORE_MANAGERIMP_H_INCLUDED
 #define RIPPLE_NODESTORE_MANAGERIMP_H_INCLUDED
 
-#include <xrpld/nodestore/Manager.h>
+#include <xrpl/nodestore/Manager.h>
 
 namespace ripple {
 
@@ -39,7 +39,7 @@ public:
     static void
     missing_backend();
 
-    ManagerImp() = default;
+    ManagerImp();
 
     ~ManagerImp() = default;
 

include/xrpl/nodestore/detail/codec.h

@@ -23,11 +23,10 @@
 // Disable lz4 deprecation warning due to incompatibility with clang attributes
 #define LZ4_DISABLE_DEPRECATE_WARNINGS
 
-#include <xrpld/nodestore/NodeObject.h>
-#include <xrpld/nodestore/detail/varint.h>
-
 #include <xrpl/basics/contract.h>
 #include <xrpl/basics/safe_cast.h>
+#include <xrpl/nodestore/NodeObject.h>
+#include <xrpl/nodestore/detail/varint.h>
 #include <xrpl/protocol/HashPrefix.h>
 
 #include <nudb/detail/field.hpp>

include/xrpl/protocol/Protocol.h

@@ -55,7 +55,10 @@ std::size_t constexpr oversizeMetaDataCap = 5200;
 /** The maximum number of entries per directory page */
 std::size_t constexpr dirNodeMaxEntries = 32;
 
-/** The maximum number of pages allowed in a directory */
+/** The maximum number of pages allowed in a directory
+
+    Made obsolete by fixDirectoryLimit amendment.
+*/
 std::uint64_t constexpr dirNodeMaxPages = 262144;
 
 /** The maximum number of items in an NFT page */

include/xrpl/protocol/PublicKey.h

@@ -21,6 +21,7 @@
 #define RIPPLE_PROTOCOL_PUBLICKEY_H_INCLUDED
 
 #include <xrpl/basics/Slice.h>
+#include <xrpl/beast/net/IPEndpoint.h>
 #include <xrpl/protocol/KeyType.h>
 #include <xrpl/protocol/STExchange.h>
 #include <xrpl/protocol/UintTypes.h>
@@ -264,6 +265,24 @@ calcNodeID(PublicKey const&);
 AccountID
 calcAccountID(PublicKey const& pk);
 
+inline std::string
+getFingerprint(
+    beast::IP::Endpoint const& address,
+    std::optional<PublicKey> const& publicKey = std::nullopt,
+    std::optional<std::string> const& id = std::nullopt)
+{
+    std::stringstream ss;
+    ss << "IP Address: " << address;
+    if (publicKey.has_value())
+    {
+        ss << ", Public Key: " << toBase58(TokenType::NodePublic, *publicKey);
+    }
+    if (id.has_value())
+    {
+        ss << ", Id: " << id.value();
+    }
+    return ss.str();
+}
 }  // namespace ripple
 
 //------------------------------------------------------------------------------

include/xrpl/protocol/STAmount.h

@@ -709,37 +709,6 @@ canAdd(STAmount const& amt1, STAmount const& amt2);
 bool
 canSubtract(STAmount const& amt1, STAmount const& amt2);
 
-// Since `canonicalize` does not have access to a ledger, this is needed to put
-// the low-level routine stAmountCanonicalize on an amendment switch. Only
-// transactions need to use this switchover. Outside of a transaction it's safe
-// to unconditionally use the new behavior.
-
-bool
-getSTAmountCanonicalizeSwitchover();
-
-void
-setSTAmountCanonicalizeSwitchover(bool v);
-
-/** RAII class to set and restore the STAmount canonicalize switchover.
- */
-
-class STAmountSO
-{
-public:
-    explicit STAmountSO(bool v) : saved_(getSTAmountCanonicalizeSwitchover())
-    {
-        setSTAmountCanonicalizeSwitchover(v);
-    }
-
-    ~STAmountSO()
-    {
-        setSTAmountCanonicalizeSwitchover(saved_);
-    }
-
-private:
-    bool saved_;
-};
-
 }  // namespace ripple
 
 //------------------------------------------------------------------------------

include/xrpl/protocol/STObject.h

@@ -244,6 +244,9 @@ public:
     getFieldPathSet(SField const& field) const;
     STVector256 const&
     getFieldV256(SField const& field) const;
+    // If not found, returns an object constructed with the given field
+    STObject
+    getFieldObject(SField const& field) const;
     STArray const&
     getFieldArray(SField const& field) const;
     STCurrency const&
@@ -390,6 +393,8 @@ public:
     setFieldV256(SField const& field, STVector256 const& v);
     void
     setFieldArray(SField const& field, STArray const& v);
+    void
+    setFieldObject(SField const& field, STObject const& v);
 
     template <class Tag>
     void

include/xrpl/protocol/STTx.h

@@ -87,8 +87,14 @@ public:
     getFullText() const override;
 
     // Outer transaction functions / signature functions.
+    static Blob
+    getSignature(STObject const& sigObject);
+
     Blob
-    getSignature() const;
+    getSignature() const
+    {
+        return getSignature(*this);
+    }
 
     uint256
     getSigningHash() const;
@@ -119,13 +125,20 @@ public:
     getJson(JsonOptions options, bool binary) const;
 
     void
-    sign(PublicKey const& publicKey, SecretKey const& secretKey);
+    sign(
+        PublicKey const& publicKey,
+        SecretKey const& secretKey,
+        std::optional<std::reference_wrapper<SField const>> signatureTarget =
+            {});
 
-    /** Check the signature.
-        @return `true` if valid signature. If invalid, the error message string.
-    */
     enum class RequireFullyCanonicalSig : bool { no, yes };
 
+    /** Check the signature.
+        @param requireCanonicalSig If `true`, check that the signature is fully
+            canonical. If `false`, only check that the signature is valid.
+        @param rules The current ledger rules.
+        @return `true` if valid signature. If invalid, the error message string.
+    */
     Expected<void, std::string>
     checkSign(RequireFullyCanonicalSig requireCanonicalSig, Rules const& rules)
         const;
@@ -150,17 +163,34 @@ public:
         char status,
         std::string const& escapedMetaData) const;
 
-    std::vector<uint256>
+    std::vector<uint256> const&
     getBatchTransactionIDs() const;
 
 private:
+    /** Check the signature.
+        @param requireCanonicalSig If `true`, check that the signature is fully
+            canonical. If `false`, only check that the signature is valid.
+        @param rules The current ledger rules.
+        @param sigObject Reference to object that contains the signature fields.
+            Will be *this more often than not.
+        @return `true` if valid signature. If invalid, the error message string.
+    */
     Expected<void, std::string>
-    checkSingleSign(RequireFullyCanonicalSig requireCanonicalSig) const;
+    checkSign(
+        RequireFullyCanonicalSig requireCanonicalSig,
+        Rules const& rules,
+        STObject const& sigObject) const;
+
+    Expected<void, std::string>
+    checkSingleSign(
+        RequireFullyCanonicalSig requireCanonicalSig,
+        STObject const& sigObject) const;
 
     Expected<void, std::string>
     checkMultiSign(
         RequireFullyCanonicalSig requireCanonicalSig,
-        Rules const& rules) const;
+        Rules const& rules,
+        STObject const& sigObject) const;
 
     Expected<void, std::string>
     checkBatchSingleSign(
@@ -179,7 +209,7 @@ private:
     move(std::size_t n, void* buf) override;
 
     friend class detail::STVar;
-    mutable std::vector<uint256> batch_txn_ids_;
+    mutable std::vector<uint256> batchTxnIds_;
 };
 
 bool

include/xrpl/protocol/SystemParameters.h

@@ -73,14 +73,8 @@ static constexpr std::uint32_t XRP_LEDGER_EARLIEST_SEQ{32570u};
  * used in asserts and tests. */
 static constexpr std::uint32_t XRP_LEDGER_EARLIEST_FEES{562177u};
 
-/** The minimum amount of support an amendment should have.
-
-    @note This value is used by legacy code and will become obsolete
-          once the fixAmendmentMajorityCalc amendment activates.
-*/
-constexpr std::ratio<204, 256> preFixAmendmentMajorityCalcThreshold;
-
-constexpr std::ratio<80, 100> postFixAmendmentMajorityCalcThreshold;
+/** The minimum amount of support an amendment should have. */
+constexpr std::ratio<80, 100> amendmentMajorityCalcThreshold;
 
 /** The minimum amount of time an amendment must hold a majority */
 constexpr std::chrono::seconds const defaultAmendmentMajorityTime = weeks{2};

include/xrpl/protocol/TER.h

@@ -225,8 +225,9 @@ enum TERcodes : TERUnderlyingType {
     terQUEUED,       // Transaction is being held in TxQ until fee drops
     terPRE_TICKET,   // Ticket is not yet in ledger but might be on its way
     terNO_AMM,       // AMM doesn't exist for the asset pair
-    terADDRESS_COLLISION,  // Failed to allocate AccountID when trying to
-                           // create a pseudo-account
+    terADDRESS_COLLISION,       // Failed to allocate AccountID when trying to
+                                // create a pseudo-account
+    terNO_DELEGATE_PERMISSION,  // Delegate does not have permission
 };
 
 //------------------------------------------------------------------------------
@@ -361,6 +362,9 @@ enum TECcodes : TERUnderlyingType {
     tecLIMIT_EXCEEDED = 195,
     tecPSEUDO_ACCOUNT = 196,
     tecPRECISION_LOSS = 197,
+    // DEPRECATED: This error code tecNO_DELEGATE_PERMISSION is reserved for
+    // backward compatibility with historical data on non-prod networks, can be
+    // reclaimed after those networks reset.
     tecNO_DELEGATE_PERMISSION = 198,
 };
 

include/xrpl/protocol/TxMeta.h

@@ -33,51 +33,35 @@ namespace ripple {
 
 class TxMeta
 {
-private:
-    struct CtorHelper
-    {
-        explicit CtorHelper() = default;
-    };
-    template <class T>
-    TxMeta(
-        uint256 const& txID,
-        std::uint32_t ledger,
-        T const& data,
-        CtorHelper);
-
 public:
-    TxMeta(
-        uint256 const& transactionID,
-        std::uint32_t ledger,
-        std::optional<uint256> parentBatchId = std::nullopt);
+    TxMeta(uint256 const& transactionID, std::uint32_t ledger);
     TxMeta(uint256 const& txID, std::uint32_t ledger, Blob const&);
-    TxMeta(uint256 const& txID, std::uint32_t ledger, std::string const&);
     TxMeta(uint256 const& txID, std::uint32_t ledger, STObject const&);
 
     uint256 const&
     getTxID() const
     {
-        return mTransactionID;
+        return transactionID_;
     }
     std::uint32_t
     getLgrSeq() const
     {
-        return mLedger;
+        return ledgerSeq_;
     }
     int
     getResult() const
     {
-        return mResult;
+        return result_;
     }
     TER
     getResultTER() const
     {
-        return TER::fromInt(mResult);
+        return TER::fromInt(result_);
     }
     std::uint32_t
     getIndex() const
     {
-        return mIndex;
+        return index_;
     }
 
     void
@@ -104,66 +88,52 @@ public:
     STArray&
     getNodes()
     {
-        return (mNodes);
+        return nodes_;
     }
     STArray const&
     getNodes() const
     {
-        return (mNodes);
+        return nodes_;
     }
 
     void
-    setDeliveredAmount(STAmount const& delivered)
+    setAdditionalFields(STObject const& obj)
     {
-        mDelivered = delivered;
+        if (obj.isFieldPresent(sfDeliveredAmount))
+            deliveredAmount_ = obj.getFieldAmount(sfDeliveredAmount);
+
+        if (obj.isFieldPresent(sfParentBatchID))
+            parentBatchID_ = obj.getFieldH256(sfParentBatchID);
     }
 
-    STAmount
+    std::optional<STAmount> const&
     getDeliveredAmount() const
     {
-        XRPL_ASSERT(
-            hasDeliveredAmount(),
-            "ripple::TxMeta::getDeliveredAmount : non-null delivered amount");
-        return *mDelivered;
-    }
-
-    bool
-    hasDeliveredAmount() const
-    {
-        return static_cast<bool>(mDelivered);
+        return deliveredAmount_;
     }
 
     void
-    setParentBatchId(uint256 const& parentBatchId)
+    setDeliveredAmount(std::optional<STAmount> const& amount)
     {
-        mParentBatchId = parentBatchId;
+        deliveredAmount_ = amount;
     }
 
-    uint256
-    getParentBatchId() const
+    void
+    setParentBatchID(std::optional<uint256> const& id)
     {
-        XRPL_ASSERT(
-            hasParentBatchId(),
-            "ripple::TxMeta::getParentBatchId : non-null batch id");
-        return *mParentBatchId;
-    }
-
-    bool
-    hasParentBatchId() const
-    {
-        return static_cast<bool>(mParentBatchId);
+        parentBatchID_ = id;
     }
 
 private:
-    uint256 mTransactionID;
-    std::uint32_t mLedger;
-    std::uint32_t mIndex;
-    int mResult;
+    uint256 transactionID_;
+    std::uint32_t ledgerSeq_;
+    std::uint32_t index_;
+    int result_;
 
-    std::optional<STAmount> mDelivered;
-    std::optional<uint256> mParentBatchId;
+    std::optional<STAmount> deliveredAmount_;
+    std::optional<uint256> parentBatchID_;
 
-    STArray mNodes;
+    STArray nodes_;
 };
 
 }  // namespace ripple

include/xrpl/protocol/detail/b58_utils.h

@@ -129,10 +129,12 @@ inplace_bigint_div_rem(std::span<uint64_t> numerator, std::uint64_t divisor)
     {
         // should never happen, but if it does then it seems natural to define
         // the a null set of numbers to be zero, so the remainder is also zero.
+        // LCOV_EXCL_START
         UNREACHABLE(
             "ripple::b58_fast::detail::inplace_bigint_div_rem : empty "
             "numerator");
         return 0;
+        // LCOV_EXCL_STOP
     }
 
     auto to_u128 = [](std::uint64_t high,

include/xrpl/protocol/detail/features.macro

@@ -29,15 +29,14 @@
 
 // Add new amendments to the top of this list.
 // Keep it sorted in reverse chronological order.
-// If you add an amendment here, then do not forget to increment `numFeatures`
-// in include/xrpl/protocol/Feature.h.
 
+XRPL_FEATURE(PermissionDelegationV1_1,   Supported::no,  VoteBehavior::DefaultNo)
+XRPL_FIX    (DirectoryLimit,             Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FIX    (IncludeKeyletFields,        Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FEATURE(DynamicMPT,                 Supported::no,  VoteBehavior::DefaultNo)
 XRPL_FIX    (TokenEscrowV1,              Supported::yes, VoteBehavior::DefaultNo)
-XRPL_FIX    (DelegateV1_1,               Supported::no,  VoteBehavior::DefaultNo)
 XRPL_FIX    (PriceOracleOrder,           Supported::yes, VoteBehavior::DefaultNo)
-XRPL_FIX    (MPTDeliveredAmount,         Supported::no,  VoteBehavior::DefaultNo)
+XRPL_FIX    (MPTDeliveredAmount,         Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FIX    (AMMClawbackRounding,        Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FEATURE(TokenEscrow,                Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FIX    (EnforceNFTokenTrustlineV2,  Supported::yes, VoteBehavior::DefaultNo)
@@ -45,7 +44,6 @@ XRPL_FIX    (AMMv1_3,                    Supported::yes, VoteBehavior::DefaultNo
 XRPL_FEATURE(PermissionedDEX,            Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FEATURE(Batch,                      Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FEATURE(SingleAssetVault,           Supported::no,  VoteBehavior::DefaultNo)
-XRPL_FEATURE(PermissionDelegation,       Supported::no,  VoteBehavior::DefaultNo)
 XRPL_FIX    (PayChanCancelAfter,         Supported::yes, VoteBehavior::DefaultNo)
 // Check flags in Credential transactions
 XRPL_FIX    (InvalidTxFlags,             Supported::yes, VoteBehavior::DefaultNo)
@@ -79,7 +77,6 @@ XRPL_FIX    (DisallowIncomingV1,         Supported::yes, VoteBehavior::DefaultNo
 XRPL_FEATURE(XChainBridge,               Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FEATURE(AMM,                        Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FEATURE(Clawback,                   Supported::yes, VoteBehavior::DefaultNo)
-XRPL_FIX    (ReducedOffersV1,            Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FIX    (NFTokenRemint,              Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FIX    (NonFungibleTokensV1_2,      Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FIX    (UniversalNumber,            Supported::yes, VoteBehavior::DefaultNo)
@@ -91,33 +88,17 @@ XRPL_FIX    (TrustLinesToSelf,           Supported::yes, VoteBehavior::DefaultNo
 XRPL_FEATURE(NonFungibleTokensV1_1,      Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FEATURE(ExpandedSignerList,         Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FEATURE(CheckCashMakesTrustLine,    Supported::yes, VoteBehavior::DefaultNo)
-XRPL_FIX    (RmSmallIncreasedQOffers,    Supported::yes, VoteBehavior::DefaultYes)
-XRPL_FIX    (STAmountCanonicalize,       Supported::yes, VoteBehavior::DefaultYes)
 XRPL_FEATURE(FlowSortStrands,            Supported::yes, VoteBehavior::DefaultYes)
 XRPL_FEATURE(TicketBatch,                Supported::yes, VoteBehavior::DefaultYes)
 XRPL_FEATURE(NegativeUNL,                Supported::yes, VoteBehavior::DefaultYes)
-XRPL_FIX    (AmendmentMajorityCalc,      Supported::yes, VoteBehavior::DefaultYes)
 XRPL_FEATURE(HardenedValidations,        Supported::yes, VoteBehavior::DefaultYes)
-// fix1781: XRPEndpointSteps should be included in the circular payment check
-XRPL_FIX    (1781,                       Supported::yes, VoteBehavior::DefaultYes)
 XRPL_FEATURE(RequireFullyCanonicalSig,   Supported::yes, VoteBehavior::DefaultYes)
-XRPL_FIX    (QualityUpperBound,          Supported::yes, VoteBehavior::DefaultYes)
 XRPL_FEATURE(DeletableAccounts,          Supported::yes, VoteBehavior::DefaultYes)
 XRPL_FIX    (PayChanRecipientOwnerDir,   Supported::yes, VoteBehavior::DefaultYes)
-XRPL_FIX    (CheckThreading,             Supported::yes, VoteBehavior::DefaultYes)
-XRPL_FIX    (MasterKeyAsRegularKey,      Supported::yes, VoteBehavior::DefaultYes)
-XRPL_FIX    (TakerDryOfferRemoval,       Supported::yes, VoteBehavior::DefaultYes)
 XRPL_FEATURE(MultiSignReserve,           Supported::yes, VoteBehavior::DefaultYes)
-XRPL_FIX    (1578,                       Supported::yes, VoteBehavior::DefaultYes)
-// fix1515: Use liquidity from strands that consume max offers, but mark as dry
-XRPL_FIX    (1515,                       Supported::yes, VoteBehavior::DefaultYes)
 XRPL_FEATURE(DepositPreauth,             Supported::yes, VoteBehavior::DefaultYes)
-XRPL_FIX    (1623,                       Supported::yes, VoteBehavior::DefaultYes)
-XRPL_FIX    (1543,                       Supported::yes, VoteBehavior::DefaultYes)
-XRPL_FIX    (1571,                       Supported::yes, VoteBehavior::DefaultYes)
 XRPL_FEATURE(Checks,                     Supported::yes, VoteBehavior::DefaultYes)
 XRPL_FEATURE(DepositAuth,                Supported::yes, VoteBehavior::DefaultYes)
-XRPL_FIX    (1513,                       Supported::yes, VoteBehavior::DefaultYes)
 XRPL_FEATURE(Flow,                       Supported::yes, VoteBehavior::DefaultYes)
 
 // The following amendments are obsolete, but must remain supported
@@ -138,21 +119,38 @@ XRPL_FEATURE(CryptoConditionsSuite, Supported::yes, VoteBehavior::Obsolete)
 
 // The following amendments have been active for at least two years. Their
 // pre-amendment code has been removed and the identifiers are deprecated.
-// All known amendments and amendments that may appear in a validated
-// ledger must be registered either here or above with the "active" amendments
-XRPL_RETIRE(MultiSign)
-XRPL_RETIRE(TrustSetAuth)
-XRPL_RETIRE(FeeEscalation)
-XRPL_RETIRE(PayChan)
-XRPL_RETIRE(CryptoConditions)
-XRPL_RETIRE(TickSize)
-XRPL_RETIRE(fix1368)
-XRPL_RETIRE(Escrow)
-XRPL_RETIRE(fix1373)
-XRPL_RETIRE(EnforceInvariants)
-XRPL_RETIRE(SortedDirectories)
+// All known amendments and amendments that may appear in a validated ledger
+// must be registered either here or above with the "active" amendments
+//
+// Please keep this list sorted alphabetically for convenience.
 XRPL_RETIRE(fix1201)
+XRPL_RETIRE(fix1368)
+XRPL_RETIRE(fix1373)
 XRPL_RETIRE(fix1512)
+XRPL_RETIRE(fix1513)
+XRPL_RETIRE(fix1515)
 XRPL_RETIRE(fix1523)
 XRPL_RETIRE(fix1528)
+XRPL_RETIRE(fix1543)
+XRPL_RETIRE(fix1571)
+XRPL_RETIRE(fix1578)
+XRPL_RETIRE(fix1623)
+XRPL_RETIRE(fix1781)
+XRPL_RETIRE(fixAmendmentMajorityCalc)
+XRPL_RETIRE(fixCheckThreading)
+XRPL_RETIRE(fixMasterKeyAsRegularKey)
+XRPL_RETIRE(fixQualityUpperBound)
+XRPL_RETIRE(fixReducedOffersV1)
+XRPL_RETIRE(fixRmSmallIncreasedQOffers)
+XRPL_RETIRE(fixSTAmountCanonicalize)
+XRPL_RETIRE(fixTakerDryOfferRemoval)
+XRPL_RETIRE(CryptoConditions)
+XRPL_RETIRE(Escrow)
+XRPL_RETIRE(EnforceInvariants)
+XRPL_RETIRE(FeeEscalation)
 XRPL_RETIRE(FlowCross)
+XRPL_RETIRE(MultiSign)
+XRPL_RETIRE(PayChan)
+XRPL_RETIRE(SortedDirectories)
+XRPL_RETIRE(TickSize)
+XRPL_RETIRE(TrustSetAuth)

include/xrpl/protocol/detail/ledger_entries.macro

@@ -457,7 +457,7 @@ LEDGER_ENTRY(ltCREDENTIAL, 0x0081, Credential, credential, ({
     {sfExpiration,           soeOPTIONAL},
     {sfURI,                  soeOPTIONAL},
     {sfIssuerNode,           soeREQUIRED},
-    {sfSubjectNode,          soeREQUIRED},
+    {sfSubjectNode,          soeOPTIONAL},
     {sfPreviousTxnID,        soeREQUIRED},
     {sfPreviousTxnLgrSeq,    soeREQUIRED},
 }))

include/xrpl/protocol/detail/transactions.macro

@@ -316,7 +316,7 @@ TRANSACTION(ttTRUST_SET, 20, TrustSet,
 #endif
 TRANSACTION(ttACCOUNT_DELETE, 21, AccountDelete,
     Delegation::notDelegatable,
-    uint256{},
+    featureDeletableAccounts,
     mustDeleteAcct,
     ({
     {sfDestination, soeREQUIRED},
@@ -837,7 +837,7 @@ TRANSACTION(ttPERMISSIONED_DOMAIN_DELETE, 63, PermissionedDomainDelete,
 #endif
 TRANSACTION(ttDELEGATE_SET, 64, DelegateSet,
     Delegation::notDelegatable,
-    featurePermissionDelegation,
+    featurePermissionDelegationV1_1,
     noPriv,
     ({
     {sfAuthorize, soeREQUIRED},
@@ -851,7 +851,7 @@ TRANSACTION(ttDELEGATE_SET, 64, DelegateSet,
 TRANSACTION(ttVAULT_CREATE, 65, VaultCreate,
     Delegation::delegatable,
     featureSingleAssetVault,
-    createPseudoAcct | createMPTIssuance,
+    createPseudoAcct | createMPTIssuance | mustModifyVault,
     ({
     {sfAsset, soeREQUIRED, soeMPTSupported},
     {sfAssetsMaximum, soeOPTIONAL},
@@ -869,7 +869,7 @@ TRANSACTION(ttVAULT_CREATE, 65, VaultCreate,
 TRANSACTION(ttVAULT_SET, 66, VaultSet,
     Delegation::delegatable,
     featureSingleAssetVault,
-    noPriv,
+    mustModifyVault,
     ({
     {sfVaultID, soeREQUIRED},
     {sfAssetsMaximum, soeOPTIONAL},
@@ -884,7 +884,7 @@ TRANSACTION(ttVAULT_SET, 66, VaultSet,
 TRANSACTION(ttVAULT_DELETE, 67, VaultDelete,
     Delegation::delegatable,
     featureSingleAssetVault,
-    mustDeleteAcct | destroyMPTIssuance,
+    mustDeleteAcct | destroyMPTIssuance | mustModifyVault,
     ({
     {sfVaultID, soeREQUIRED},
 }))
@@ -896,7 +896,7 @@ TRANSACTION(ttVAULT_DELETE, 67, VaultDelete,
 TRANSACTION(ttVAULT_DEPOSIT, 68, VaultDeposit,
     Delegation::delegatable,
     featureSingleAssetVault,
-    mayAuthorizeMPT,
+    mayAuthorizeMPT | mustModifyVault,
     ({
     {sfVaultID, soeREQUIRED},
     {sfAmount, soeREQUIRED, soeMPTSupported},
@@ -909,7 +909,7 @@ TRANSACTION(ttVAULT_DEPOSIT, 68, VaultDeposit,
 TRANSACTION(ttVAULT_WITHDRAW, 69, VaultWithdraw,
     Delegation::delegatable,
     featureSingleAssetVault,
-    mayDeleteMPT,
+    mayDeleteMPT | mayAuthorizeMPT | mustModifyVault,
     ({
     {sfVaultID, soeREQUIRED},
     {sfAmount, soeREQUIRED, soeMPTSupported},
@@ -924,7 +924,7 @@ TRANSACTION(ttVAULT_WITHDRAW, 69, VaultWithdraw,
 TRANSACTION(ttVAULT_CLAWBACK, 70, VaultClawback,
     Delegation::delegatable,
     featureSingleAssetVault,
-    mayDeleteMPT,
+    mayDeleteMPT | mustModifyVault,
     ({
     {sfVaultID, soeREQUIRED},
     {sfHolder, soeREQUIRED},

include/xrpl/protocol/jss.h

@@ -569,6 +569,7 @@ JSS(settle_delay);            // out: AccountChannels
 JSS(severity);                // in: LogLevel
 JSS(shares);                  // out: VaultInfo
 JSS(signature);               // out: NetworkOPs, ChannelAuthorize
+JSS(signature_target);        // in: TransactionSign
 JSS(signature_verified);      // out: ChannelVerify
 JSS(signing_key);             // out: NetworkOPs
 JSS(signing_keys);            // out: ValidatorList

include/xrpl/resource/Consumer.h

@@ -21,6 +21,7 @@
 #define RIPPLE_RESOURCE_CONSUMER_H_INCLUDED
 
 #include <xrpl/basics/Log.h>
+#include <xrpl/protocol/PublicKey.h>
 #include <xrpl/resource/Charge.h>
 #include <xrpl/resource/Disposition.h>
 
@@ -87,6 +88,9 @@ public:
     Entry&
     entry();
 
+    void
+    setPublicKey(PublicKey const& publicKey);
+
 private:
     Logic* m_logic;
     Entry* m_entry;

include/xrpl/resource/detail/Entry.h

@@ -53,7 +53,7 @@ struct Entry : public beast::List<Entry>::Node
     std::string
     to_string() const
     {
-        return key->address.to_string();
+        return getFingerprint(key->address, publicKey);
     }
 
     /**
@@ -82,6 +82,9 @@ struct Entry : public beast::List<Entry>::Node
         return local_balance.add(charge, now) + remote_balance;
     }
 
+    // The public key of the peer
+    std::optional<PublicKey> publicKey;
+
     // Back pointer to the map key (bit of a hack here)
     Key const* key;
 

include/xrpl/resource/detail/Logic.h

@@ -436,10 +436,12 @@ public:
                     admin_.erase(admin_.iterator_to(entry));
                     break;
                 default:
+                    // LCOV_EXCL_START
                     UNREACHABLE(
                         "ripple::Resource::Logic::release : invalid entry "
                         "kind");
                     break;
+                    // LCOV_EXCL_STOP
             }
             inactive_.push_back(entry);
             entry.whenExpires = m_clock.now() + secondsUntilExpiration;

include/xrpl/server/detail/Door.h

@@ -30,15 +30,29 @@
 #include <boost/asio/buffer.hpp>
 #include <boost/asio/io_context.hpp>
 #include <boost/asio/ip/tcp.hpp>
+#include <boost/asio/post.hpp>
 #include <boost/asio/spawn.hpp>
+#include <boost/asio/steady_timer.hpp>
 #include <boost/beast/core/detect_ssl.hpp>
 #include <boost/beast/core/multi_buffer.hpp>
 #include <boost/beast/core/tcp_stream.hpp>
 #include <boost/container/flat_map.hpp>
+#include <boost/predef.h>
 
+#if !BOOST_OS_WINDOWS
+#include <sys/resource.h>
+
+#include <dirent.h>
+#include <unistd.h>
+#endif
+
+#include <algorithm>
 #include <chrono>
+#include <cstdint>
 #include <functional>
 #include <memory>
+#include <optional>
+#include <sstream>
 
 namespace ripple {
 
@@ -98,10 +112,27 @@ private:
     boost::asio::strand<boost::asio::io_context::executor_type> strand_;
     bool ssl_;
     bool plain_;
+    static constexpr std::chrono::milliseconds INITIAL_ACCEPT_DELAY{50};
+    static constexpr std::chrono::milliseconds MAX_ACCEPT_DELAY{2000};
+    std::chrono::milliseconds accept_delay_{INITIAL_ACCEPT_DELAY};
+    boost::asio::steady_timer backoff_timer_;
+    static constexpr double FREE_FD_THRESHOLD = 0.70;
+
+    struct FDStats
+    {
+        std::uint64_t used{0};
+        std::uint64_t limit{0};
+    };
 
     void
     reOpen();
 
+    std::optional<FDStats>
+    query_fd_stats() const;
+
+    bool
+    should_throttle_for_fds();
+
 public:
     Door(
         Handler& handler,
@@ -299,6 +330,7 @@ Door<Handler>::Door(
     , plain_(
           port_.protocol.count("http") > 0 || port_.protocol.count("ws") > 0 ||
           port_.protocol.count("ws2"))
+    , backoff_timer_(io_context)
 {
     reOpen();
 }
@@ -323,6 +355,7 @@ Door<Handler>::close()
         return boost::asio::post(
             strand_,
             std::bind(&Door<Handler>::close, this->shared_from_this()));
+    backoff_timer_.cancel();
     error_code ec;
     acceptor_.close(ec);
 }
@@ -368,6 +401,17 @@ Door<Handler>::do_accept(boost::asio::yield_context do_yield)
 {
     while (acceptor_.is_open())
     {
+        if (should_throttle_for_fds())
+        {
+            backoff_timer_.expires_after(accept_delay_);
+            boost::system::error_code tec;
+            backoff_timer_.async_wait(do_yield[tec]);
+            accept_delay_ = std::min(accept_delay_ * 2, MAX_ACCEPT_DELAY);
+            JLOG(j_.warn()) << "Throttling do_accept for "
+                            << accept_delay_.count() << "ms.";
+            continue;
+        }
+
         error_code ec;
         endpoint_type remote_address;
         stream_type stream(ioc_);
@@ -377,15 +421,28 @@ Door<Handler>::do_accept(boost::asio::yield_context do_yield)
         {
             if (ec == boost::asio::error::operation_aborted)
                 break;
-            JLOG(j_.error()) << "accept: " << ec.message();
-            if (ec == boost::asio::error::no_descriptors)
+
+            if (ec == boost::asio::error::no_descriptors ||
+                ec == boost::asio::error::no_buffer_space)
             {
-                JLOG(j_.info()) << "re-opening acceptor";
-                reOpen();
+                JLOG(j_.warn()) << "accept: Too many open files. Pausing for "
+                                << accept_delay_.count() << "ms.";
+
+                backoff_timer_.expires_after(accept_delay_);
+                boost::system::error_code tec;
+                backoff_timer_.async_wait(do_yield[tec]);
+
+                accept_delay_ = std::min(accept_delay_ * 2, MAX_ACCEPT_DELAY);
+            }
+            else
+            {
+                JLOG(j_.error()) << "accept error: " << ec.message();
             }
             continue;
         }
 
+        accept_delay_ = INITIAL_ACCEPT_DELAY;
+
         if (ssl_ && plain_)
         {
             if (auto sp = ios().template emplace<Detector>(
@@ -408,6 +465,60 @@ Door<Handler>::do_accept(boost::asio::yield_context do_yield)
     }
 }
 
+template <class Handler>
+std::optional<typename Door<Handler>::FDStats>
+Door<Handler>::query_fd_stats() const
+{
+#if BOOST_OS_WINDOWS
+    return std::nullopt;
+#else
+    FDStats s;
+    struct rlimit rl;
+    if (getrlimit(RLIMIT_NOFILE, &rl) != 0 || rl.rlim_cur == RLIM_INFINITY)
+        return std::nullopt;
+    s.limit = static_cast<std::uint64_t>(rl.rlim_cur);
+#if BOOST_OS_LINUX
+    constexpr char const* kFdDir = "/proc/self/fd";
+#else
+    constexpr char const* kFdDir = "/dev/fd";
+#endif
+    if (DIR* d = ::opendir(kFdDir))
+    {
+        std::uint64_t cnt = 0;
+        while (::readdir(d) != nullptr)
+            ++cnt;
+        ::closedir(d);
+        // readdir counts '.', '..', and the DIR* itself shows in the list
+        s.used = (cnt >= 3) ? (cnt - 3) : 0;
+        return s;
+    }
+    return std::nullopt;
+#endif
+}
+
+template <class Handler>
+bool
+Door<Handler>::should_throttle_for_fds()
+{
+#if BOOST_OS_WINDOWS
+    return false;
+#else
+    auto const stats = query_fd_stats();
+    if (!stats || stats->limit == 0)
+        return false;
+
+    auto const& s = *stats;
+    auto const free = (s.limit > s.used) ? (s.limit - s.used) : 0ull;
+    double const free_ratio =
+        static_cast<double>(free) / static_cast<double>(s.limit);
+    if (free_ratio < FREE_FD_THRESHOLD)
+    {
+        return true;
+    }
+    return false;
+#endif
+}
+
 }  // namespace ripple
 
 #endif

include/xrpl/shamap/Family.h

@@ -20,11 +20,10 @@
 #ifndef RIPPLE_SHAMAP_FAMILY_H_INCLUDED
 #define RIPPLE_SHAMAP_FAMILY_H_INCLUDED
 
-#include <xrpld/nodestore/Database.h>
-#include <xrpld/shamap/FullBelowCache.h>
-#include <xrpld/shamap/TreeNodeCache.h>
-
 #include <xrpl/beast/utility/Journal.h>
+#include <xrpl/nodestore/Database.h>
+#include <xrpl/shamap/FullBelowCache.h>
+#include <xrpl/shamap/TreeNodeCache.h>
 
 #include <cstdint>
 

include/xrpl/shamap/SHAMap.h

@@ -20,21 +20,19 @@
 #ifndef RIPPLE_SHAMAP_SHAMAP_H_INCLUDED
 #define RIPPLE_SHAMAP_SHAMAP_H_INCLUDED
 
-#include <xrpld/nodestore/Database.h>
-#include <xrpld/nodestore/NodeObject.h>
-#include <xrpld/shamap/Family.h>
-#include <xrpld/shamap/SHAMapAddNode.h>
-#include <xrpld/shamap/SHAMapInnerNode.h>
-#include <xrpld/shamap/SHAMapItem.h>
-#include <xrpld/shamap/SHAMapLeafNode.h>
-#include <xrpld/shamap/SHAMapMissingNode.h>
-#include <xrpld/shamap/SHAMapTreeNode.h>
-#include <xrpld/shamap/TreeNodeCache.h>
-
 #include <xrpl/basics/IntrusivePointer.h>
 #include <xrpl/basics/UnorderedContainers.h>
 #include <xrpl/beast/utility/Journal.h>
 #include <xrpl/beast/utility/instrumentation.h>
+#include <xrpl/nodestore/Database.h>
+#include <xrpl/nodestore/NodeObject.h>
+#include <xrpl/shamap/Family.h>
+#include <xrpl/shamap/SHAMapAddNode.h>
+#include <xrpl/shamap/SHAMapInnerNode.h>
+#include <xrpl/shamap/SHAMapItem.h>
+#include <xrpl/shamap/SHAMapLeafNode.h>
+#include <xrpl/shamap/SHAMapMissingNode.h>
+#include <xrpl/shamap/SHAMapTreeNode.h>
 
 #include <set>
 #include <stack>

include/xrpl/shamap/SHAMapAccountStateLeafNode.h

@@ -20,12 +20,11 @@
 #ifndef RIPPLE_SHAMAP_SHAMAPACCOUNTSTATELEAFNODE_H_INCLUDED
 #define RIPPLE_SHAMAP_SHAMAPACCOUNTSTATELEAFNODE_H_INCLUDED
 
-#include <xrpld/shamap/SHAMapItem.h>
-#include <xrpld/shamap/SHAMapLeafNode.h>
-
 #include <xrpl/basics/CountedObject.h>
 #include <xrpl/protocol/HashPrefix.h>
 #include <xrpl/protocol/digest.h>
+#include <xrpl/shamap/SHAMapItem.h>
+#include <xrpl/shamap/SHAMapLeafNode.h>
 
 namespace ripple {
 

include/xrpl/shamap/SHAMapInnerNode.h

@@ -20,10 +20,9 @@
 #ifndef RIPPLE_SHAMAP_SHAMAPINNERNODE_H_INCLUDED
 #define RIPPLE_SHAMAP_SHAMAPINNERNODE_H_INCLUDED
 
-#include <xrpld/shamap/SHAMapNodeID.h>
-#include <xrpld/shamap/detail/TaggedPointer.h>
-
 #include <xrpl/basics/IntrusivePointer.h>
+#include <xrpl/shamap/SHAMapNodeID.h>
+#include <xrpl/shamap/detail/TaggedPointer.h>
 
 #include <atomic>
 #include <cstdint>

include/xrpl/shamap/SHAMapLeafNode.h

@@ -20,8 +20,8 @@
 #ifndef RIPPLE_SHAMAP_SHAMAPLEAFNODE_H_INCLUDED
 #define RIPPLE_SHAMAP_SHAMAPLEAFNODE_H_INCLUDED
 
-#include <xrpld/shamap/SHAMapItem.h>
-#include <xrpld/shamap/SHAMapTreeNode.h>
+#include <xrpl/shamap/SHAMapItem.h>
+#include <xrpl/shamap/SHAMapTreeNode.h>
 
 #include <cstdint>
 

include/xrpl/shamap/SHAMapMissingNode.h

@@ -20,9 +20,8 @@
 #ifndef RIPPLE_SHAMAP_SHAMAPMISSINGNODE_H_INCLUDED
 #define RIPPLE_SHAMAP_SHAMAPMISSINGNODE_H_INCLUDED
 
-#include <xrpld/shamap/SHAMapTreeNode.h>
-
 #include <xrpl/basics/base_uint.h>
+#include <xrpl/shamap/SHAMapTreeNode.h>
 
 #include <iosfwd>
 #include <stdexcept>

include/xrpl/shamap/SHAMapSyncFilter.h

@@ -20,7 +20,7 @@
 #ifndef RIPPLE_SHAMAP_SHAMAPSYNCFILTER_H_INCLUDED
 #define RIPPLE_SHAMAP_SHAMAPSYNCFILTER_H_INCLUDED
 
-#include <xrpld/shamap/SHAMapTreeNode.h>
+#include <xrpl/shamap/SHAMapTreeNode.h>
 
 #include <optional>
 

include/xrpl/shamap/SHAMapTreeNode.h

@@ -20,13 +20,12 @@
 #ifndef RIPPLE_SHAMAP_SHAMAPTREENODE_H_INCLUDED
 #define RIPPLE_SHAMAP_SHAMAPTREENODE_H_INCLUDED
 
-#include <xrpld/shamap/SHAMapItem.h>
-#include <xrpld/shamap/SHAMapNodeID.h>
-
 #include <xrpl/basics/IntrusivePointer.h>
 #include <xrpl/basics/IntrusiveRefCounts.h>
 #include <xrpl/basics/SHAMapHash.h>
 #include <xrpl/protocol/Serializer.h>
+#include <xrpl/shamap/SHAMapItem.h>
+#include <xrpl/shamap/SHAMapNodeID.h>
 
 #include <cstdint>
 #include <string>

include/xrpl/shamap/SHAMapTxLeafNode.h

@@ -20,12 +20,11 @@
 #ifndef RIPPLE_SHAMAP_SHAMAPTXLEAFNODE_H_INCLUDED
 #define RIPPLE_SHAMAP_SHAMAPTXLEAFNODE_H_INCLUDED
 
-#include <xrpld/shamap/SHAMapItem.h>
-#include <xrpld/shamap/SHAMapLeafNode.h>
-
 #include <xrpl/basics/CountedObject.h>
 #include <xrpl/protocol/HashPrefix.h>
 #include <xrpl/protocol/digest.h>
+#include <xrpl/shamap/SHAMapItem.h>
+#include <xrpl/shamap/SHAMapLeafNode.h>
 
 namespace ripple {
 

include/xrpl/shamap/SHAMapTxPlusMetaLeafNode.h

@@ -20,12 +20,11 @@
 #ifndef RIPPLE_SHAMAP_SHAMAPLEAFTXPLUSMETANODE_H_INCLUDED
 #define RIPPLE_SHAMAP_SHAMAPLEAFTXPLUSMETANODE_H_INCLUDED
 
-#include <xrpld/shamap/SHAMapItem.h>
-#include <xrpld/shamap/SHAMapLeafNode.h>
-
 #include <xrpl/basics/CountedObject.h>
 #include <xrpl/protocol/HashPrefix.h>
 #include <xrpl/protocol/digest.h>
+#include <xrpl/shamap/SHAMapItem.h>
+#include <xrpl/shamap/SHAMapLeafNode.h>
 
 namespace ripple {
 

include/xrpl/shamap/TreeNodeCache.h

@@ -20,10 +20,9 @@
 #ifndef RIPPLE_SHAMAP_TREENODECACHE_H_INCLUDED
 #define RIPPLE_SHAMAP_TREENODECACHE_H_INCLUDED
 
-#include <xrpld/shamap/SHAMapTreeNode.h>
-
 #include <xrpl/basics/IntrusivePointer.h>
 #include <xrpl/basics/TaggedCache.h>
+#include <xrpl/shamap/SHAMapTreeNode.h>
 
 namespace ripple {
 

include/xrpl/shamap/detail/TaggedPointer.h

@@ -20,9 +20,8 @@
 #ifndef RIPPLE_SHAMAP_TAGGEDPOINTER_H_INCLUDED
 #define RIPPLE_SHAMAP_TAGGEDPOINTER_H_INCLUDED
 
-#include <xrpld/shamap/SHAMapTreeNode.h>
-
 #include <xrpl/basics/IntrusivePointer.h>
+#include <xrpl/shamap/SHAMapTreeNode.h>
 
 #include <array>
 #include <cstdint>

include/xrpl/shamap/detail/TaggedPointer.ipp

@@ -17,10 +17,9 @@
 */
 //==============================================================================
 
-#include <xrpld/shamap/SHAMapInnerNode.h>
-#include <xrpld/shamap/detail/TaggedPointer.h>
-
 #include <xrpl/basics/ByteUtilities.h>
+#include <xrpl/shamap/SHAMapInnerNode.h>
+#include <xrpl/shamap/detail/TaggedPointer.h>
 
 #include <boost/pool/pool_alloc.hpp>
 

src/libxrpl/basics/Log.cpp

@@ -239,9 +239,11 @@ Logs::fromSeverity(beast::severities::Severity level)
         case kError:
             return lsERROR;
 
+        // LCOV_EXCL_START
         default:
             UNREACHABLE("ripple::Logs::fromSeverity : invalid severity");
             [[fallthrough]];
+        // LCOV_EXCL_STOP
         case kFatal:
             break;
     }
@@ -265,9 +267,11 @@ Logs::toSeverity(LogSeverity level)
             return kWarning;
         case lsERROR:
             return kError;
+        // LCOV_EXCL_START
         default:
             UNREACHABLE("ripple::Logs::toSeverity : invalid severity");
             [[fallthrough]];
+        // LCOV_EXCL_STOP
         case lsFATAL:
             break;
     }
@@ -292,9 +296,11 @@ Logs::toString(LogSeverity s)
             return "Error";
         case lsFATAL:
             return "Fatal";
+        // LCOV_EXCL_START
         default:
             UNREACHABLE("ripple::Logs::toString : invalid severity");
             return "Unknown";
+            // LCOV_EXCL_STOP
     }
 }
 
@@ -356,9 +362,11 @@ Logs::format(
         case kError:
             output += "ERR ";
             break;
+        // LCOV_EXCL_START
         default:
             UNREACHABLE("ripple::Logs::format : invalid severity");
             [[fallthrough]];
+        // LCOV_EXCL_STOP
         case kFatal:
             output += "FTL ";
             break;

src/libxrpl/basics/contract.cpp

@@ -36,6 +36,7 @@ LogThrow(std::string const& title)
 [[noreturn]] void
 LogicError(std::string const& s) noexcept
 {
+    // LCOV_EXCL_START
     JLOG(debugLog().fatal()) << s;
     std::cerr << "Logic error: " << s << std::endl;
     // Use a non-standard contract naming here (without namespace) because
@@ -45,6 +46,7 @@ LogicError(std::string const& s) noexcept
     // For the above reasons, we want this contract to stand out.
     UNREACHABLE("LogicError", {{"message", s}});
     std::abort();
+    // LCOV_EXCL_STOP
 }
 
 }  // namespace ripple

src/libxrpl/json/Object.cpp

@@ -174,7 +174,7 @@ Array::append(Json::Value const& v)
             return;
         }
     }
-    UNREACHABLE("Json::Array::append : invalid type");
+    UNREACHABLE("Json::Array::append : invalid type");  // LCOV_EXCL_LINE
 }
 
 void
@@ -209,7 +209,7 @@ Object::set(std::string const& k, Json::Value const& v)
             return;
         }
     }
-    UNREACHABLE("Json::Object::set : invalid type");
+    UNREACHABLE("Json::Object::set : invalid type");  // LCOV_EXCL_LINE
 }
 
 //------------------------------------------------------------------------------

src/libxrpl/json/json_value.cpp

@@ -213,8 +213,10 @@ Value::Value(ValueType type) : type_(type), allocated_(0)
             value_.bool_ = false;
             break;
 
+        // LCOV_EXCL_START
         default:
             UNREACHABLE("Json::Value::Value(ValueType) : invalid type");
+            // LCOV_EXCL_STOP
     }
 }
 
@@ -290,8 +292,10 @@ Value::Value(Value const& other) : type_(other.type_)
             value_.map_ = new ObjectValues(*other.value_.map_);
             break;
 
+        // LCOV_EXCL_START
         default:
             UNREACHABLE("Json::Value::Value(Value const&) : invalid type");
+            // LCOV_EXCL_STOP
     }
 }
 
@@ -318,8 +322,10 @@ Value::~Value()
                 delete value_.map_;
             break;
 
+        // LCOV_EXCL_START
         default:
             UNREACHABLE("Json::Value::~Value : invalid type");
+            // LCOV_EXCL_STOP
     }
 }
 
@@ -419,8 +425,10 @@ operator<(Value const& x, Value const& y)
             return *x.value_.map_ < *y.value_.map_;
         }
 
+            // LCOV_EXCL_START
         default:
             UNREACHABLE("Json::operator<(Value, Value) : invalid type");
+            // LCOV_EXCL_STOP
     }
 
     return 0;  // unreachable
@@ -465,8 +473,10 @@ operator==(Value const& x, Value const& y)
             return x.value_.map_->size() == y.value_.map_->size() &&
                 *x.value_.map_ == *y.value_.map_;
 
+        // LCOV_EXCL_START
         default:
             UNREACHABLE("Json::operator==(Value, Value) : invalid type");
+            // LCOV_EXCL_STOP
     }
 
     return 0;  // unreachable
@@ -506,8 +516,10 @@ Value::asString() const
         case objectValue:
             JSON_ASSERT_MESSAGE(false, "Type is not convertible to string");
 
+            // LCOV_EXCL_START
         default:
             UNREACHABLE("Json::Value::asString : invalid type");
+            // LCOV_EXCL_STOP
     }
 
     return "";  // unreachable
@@ -548,8 +560,10 @@ Value::asInt() const
         case objectValue:
             JSON_ASSERT_MESSAGE(false, "Type is not convertible to int");
 
+            // LCOV_EXCL_START
         default:
             UNREACHABLE("Json::Value::asInt : invalid type");
+            // LCOV_EXCL_STOP
     }
 
     return 0;  // unreachable;
@@ -590,8 +604,10 @@ Value::asUInt() const
         case objectValue:
             JSON_ASSERT_MESSAGE(false, "Type is not convertible to uint");
 
+            // LCOV_EXCL_START
         default:
             UNREACHABLE("Json::Value::asUInt : invalid type");
+            // LCOV_EXCL_STOP
     }
 
     return 0;  // unreachable;
@@ -622,8 +638,10 @@ Value::asDouble() const
         case objectValue:
             JSON_ASSERT_MESSAGE(false, "Type is not convertible to double");
 
+            // LCOV_EXCL_START
         default:
             UNREACHABLE("Json::Value::asDouble : invalid type");
+            // LCOV_EXCL_STOP
     }
 
     return 0;  // unreachable;
@@ -654,8 +672,10 @@ Value::asBool() const
         case objectValue:
             return value_.map_->size() != 0;
 
+            // LCOV_EXCL_START
         default:
             UNREACHABLE("Json::Value::asBool : invalid type");
+            // LCOV_EXCL_STOP
     }
 
     return false;  // unreachable;
@@ -710,8 +730,10 @@ Value::isConvertibleTo(ValueType other) const
             return other == objectValue ||
                 (other == nullValue && value_.map_->size() == 0);
 
+        // LCOV_EXCL_START
         default:
             UNREACHABLE("Json::Value::isConvertible : invalid type");
+            // LCOV_EXCL_STOP
     }
 
     return false;  // unreachable;
@@ -744,8 +766,10 @@ Value::size() const
         case objectValue:
             return Int(value_.map_->size());
 
+            // LCOV_EXCL_START
         default:
             UNREACHABLE("Json::Value::size : invalid type");
+            // LCOV_EXCL_STOP
     }
 
     return 0;  // unreachable;

src/libxrpl/ledger/ApplyStateTable.cpp

@@ -126,10 +126,10 @@ ApplyStateTable::apply(
     std::optional<TxMeta> metadata;
     if (!to.open() || isDryRun)
     {
-        TxMeta meta(tx.getTransactionID(), to.seq(), parentBatchId);
+        TxMeta meta(tx.getTransactionID(), to.seq());
 
-        if (deliver)
-            meta.setDeliveredAmount(*deliver);
+        meta.setDeliveredAmount(deliver);
+        meta.setParentBatchID(parentBatchId);
 
         Mods newMod;
         for (auto& item : items_)
@@ -259,9 +259,11 @@ ApplyStateTable::apply(
             }
             else
             {
+                // LCOV_EXCL_START
                 UNREACHABLE(
                     "ripple::detail::ApplyStateTable::apply : unsupported "
                     "operation type");
+                // LCOV_EXCL_STOP
             }
         }
 
@@ -680,12 +682,6 @@ ApplyStateTable::threadOwners(
             if (auto const optSleAcct{(*sle)[~sfAccount]})
                 threadTx(base, meta, *optSleAcct, mods, j);
 
-            // Don't thread a check's sfDestination unless the amendment is
-            // enabled
-            if (ledgerType == ltCHECK &&
-                !base.rules().enabled(fixCheckThreading))
-                break;
-
             // If sfDestination is present, thread to that account
             if (auto const optSleDest{(*sle)[~sfDestination]})
                 threadTx(base, meta, *optSleDest, mods, j);

src/libxrpl/ledger/ApplyView.cpp

@@ -22,6 +22,9 @@
 #include <xrpl/ledger/ApplyView.h>
 #include <xrpl/protocol/Protocol.h>
 
+#include <limits>
+#include <type_traits>
+
 namespace ripple {
 
 std::optional<std::uint64_t>
@@ -91,8 +94,21 @@ ApplyView::dirAdd(
         return page;
     }
 
+    // We rely on modulo arithmetic of unsigned integers (guaranteed in
+    // [basic.fundamental] paragraph 2) to detect page representation overflow.
+    // For signed integers this would be UB, hence static_assert here.
+    static_assert(std::is_unsigned_v<decltype(page)>);
+    // Defensive check against breaking changes in compiler.
+    static_assert([]<typename T>(std::type_identity<T>) constexpr -> T {
+        T tmp = std::numeric_limits<T>::max();
+        return ++tmp;
+    }(std::type_identity<decltype(page)>{}) == 0);
+    ++page;
     // Check whether we're out of pages.
-    if (++page >= dirNodeMaxPages)
+    if (page == 0)
+        return std::nullopt;
+    if (!rules().enabled(fixDirectoryLimit) &&
+        page >= dirNodeMaxPages)  // Old pages limit
         return std::nullopt;
 
     // We are about to create a new node; we'll link it to
@@ -133,8 +149,10 @@ ApplyView::emptyDirDelete(Keylet const& directory)
     if (directory.type != ltDIR_NODE ||
         node->getFieldH256(sfRootIndex) != directory.key)
     {
+        // LCOV_EXCL_START
         UNREACHABLE("ripple::ApplyView::emptyDirDelete : invalid node type");
         return false;
+        // LCOV_EXCL_STOP
     }
 
     // The directory still contains entries and so it cannot be removed

src/libxrpl/ledger/BookDirs.cpp

@@ -36,7 +36,9 @@ BookDirs::BookDirs(ReadView const& view, Book const& book)
     {
         if (!cdirFirst(*view_, key_, sle_, entry_, index_))
         {
+            // LCOV_EXCL_START
             UNREACHABLE("ripple::BookDirs::BookDirs : directory is empty");
+            // LCOV_EXCL_STOP
         }
     }
 }
@@ -110,9 +112,11 @@ BookDirs::const_iterator::operator++()
         }
         else if (!cdirFirst(*view_, cur_key_, sle_, entry_, index_))
         {
+            // LCOV_EXCL_START
             UNREACHABLE(
                 "ripple::BookDirs::const_iterator::operator++ : directory is "
                 "empty");
+            // LCOV_EXCL_STOP
         }
     }