Fix build error

Signed-off-by: JCW <a1q123456@users.noreply.github.com>

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

@@ -11,7 +11,7 @@ Loop: xrpld.app xrpld.overlay
   xrpld.overlay > xrpld.app
 
 Loop: xrpld.app xrpld.peerfinder
-  xrpld.peerfinder ~= xrpld.app
+  xrpld.peerfinder == xrpld.app
 
 Loop: xrpld.app xrpld.rpc
   xrpld.rpc > xrpld.app

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

@@ -17,12 +17,15 @@ libxrpl.nodestore > xrpl.protocol
 libxrpl.protocol > xrpl.basics
 libxrpl.protocol > xrpl.json
 libxrpl.protocol > xrpl.protocol
+libxrpl.rdb > xrpl.basics
+libxrpl.rdb > xrpl.rdb
 libxrpl.resource > xrpl.basics
 libxrpl.resource > xrpl.json
 libxrpl.resource > xrpl.resource
 libxrpl.server > xrpl.basics
 libxrpl.server > xrpl.json
 libxrpl.server > xrpl.protocol
+libxrpl.server > xrpl.rdb
 libxrpl.server > xrpl.server
 libxrpl.shamap > xrpl.basics
 libxrpl.shamap > xrpl.protocol
@@ -41,7 +44,9 @@ test.app > xrpl.json
 test.app > xrpl.ledger
 test.app > xrpl.nodestore
 test.app > xrpl.protocol
+test.app > xrpl.rdb
 test.app > xrpl.resource
+test.app > xrpl.server
 test.basics > test.jtx
 test.basics > test.unit_test
 test.basics > xrpl.basics
@@ -67,6 +72,7 @@ test.core > xrpl.basics
 test.core > xrpl.core
 test.core > xrpld.core
 test.core > xrpl.json
+test.core > xrpl.rdb
 test.core > xrpl.server
 test.csf > xrpl.basics
 test.csf > xrpld.consensus
@@ -95,8 +101,8 @@ test.nodestore > test.jtx
 test.nodestore > test.toplevel
 test.nodestore > test.unit_test
 test.nodestore > xrpl.basics
-test.nodestore > xrpld.core
 test.nodestore > xrpl.nodestore
+test.nodestore > xrpl.rdb
 test.overlay > test.jtx
 test.overlay > test.toplevel
 test.overlay > test.unit_test
@@ -152,6 +158,8 @@ tests.libxrpl > xrpl.json
 tests.libxrpl > xrpl.net
 xrpl.core > xrpl.basics
 xrpl.core > xrpl.json
+xrpl.core > xrpl.ledger
+xrpl.core > xrpl.protocol
 xrpl.json > xrpl.basics
 xrpl.ledger > xrpl.basics
 xrpl.ledger > xrpl.protocol
@@ -160,12 +168,17 @@ xrpl.nodestore > xrpl.basics
 xrpl.nodestore > xrpl.protocol
 xrpl.protocol > xrpl.basics
 xrpl.protocol > xrpl.json
+xrpl.rdb > xrpl.basics
+xrpl.rdb > xrpl.core
+xrpl.rdb > xrpl.protocol
 xrpl.resource > xrpl.basics
 xrpl.resource > xrpl.json
 xrpl.resource > xrpl.protocol
 xrpl.server > xrpl.basics
+xrpl.server > xrpl.core
 xrpl.server > xrpl.json
 xrpl.server > xrpl.protocol
+xrpl.server > xrpl.rdb
 xrpl.shamap > xrpl.basics
 xrpl.shamap > xrpl.nodestore
 xrpl.shamap > xrpl.protocol
@@ -179,7 +192,9 @@ xrpld.app > xrpl.ledger
 xrpld.app > xrpl.net
 xrpld.app > xrpl.nodestore
 xrpld.app > xrpl.protocol
+xrpld.app > xrpl.rdb
 xrpld.app > xrpl.resource
+xrpld.app > xrpl.server
 xrpld.app > xrpl.shamap
 xrpld.conditions > xrpl.basics
 xrpld.conditions > xrpl.protocol
@@ -191,17 +206,20 @@ xrpld.core > xrpl.core
 xrpld.core > xrpl.json
 xrpld.core > xrpl.net
 xrpld.core > xrpl.protocol
+xrpld.core > xrpl.rdb
 xrpld.overlay > xrpl.basics
 xrpld.overlay > xrpl.core
 xrpld.overlay > xrpld.core
 xrpld.overlay > xrpld.peerfinder
 xrpld.overlay > xrpl.json
 xrpld.overlay > xrpl.protocol
+xrpld.overlay > xrpl.rdb
 xrpld.overlay > xrpl.resource
 xrpld.overlay > xrpl.server
 xrpld.peerfinder > xrpl.basics
 xrpld.peerfinder > xrpld.core
 xrpld.peerfinder > xrpl.protocol
+xrpld.peerfinder > xrpl.rdb
 xrpld.perflog > xrpl.basics
 xrpld.perflog > xrpl.core
 xrpld.perflog > xrpld.rpc
@@ -214,6 +232,7 @@ xrpld.rpc > xrpl.ledger
 xrpld.rpc > xrpl.net
 xrpld.rpc > xrpl.nodestore
 xrpld.rpc > xrpl.protocol
+xrpld.rpc > xrpl.rdb
 xrpld.rpc > xrpl.resource
 xrpld.rpc > xrpl.server
 xrpld.shamap > xrpl.shamap

cmake/XrplCore.cmake

@@ -114,22 +114,32 @@ target_link_libraries(xrpl.libxrpl.net PUBLIC
   xrpl.libxrpl.resource
 )
 
-add_module(xrpl server)
-target_link_libraries(xrpl.libxrpl.server PUBLIC xrpl.libxrpl.protocol)
-
 add_module(xrpl nodestore)
 target_link_libraries(xrpl.libxrpl.nodestore PUBLIC
-        xrpl.libxrpl.basics
-        xrpl.libxrpl.json
-        xrpl.libxrpl.protocol
+  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
+  xrpl.libxrpl.basics
+  xrpl.libxrpl.crypto
+  xrpl.libxrpl.protocol
+  xrpl.libxrpl.nodestore
+)
+
+add_module(xrpl rdb)
+target_link_libraries(xrpl.libxrpl.rdb PUBLIC
+  xrpl.libxrpl.basics
+  xrpl.libxrpl.core
+)
+
+add_module(xrpl server)
+target_link_libraries(xrpl.libxrpl.server PUBLIC
+  xrpl.libxrpl.protocol
+  xrpl.libxrpl.core
+  xrpl.libxrpl.rdb
 )
 
 add_module(xrpl ledger)
@@ -137,6 +147,7 @@ target_link_libraries(xrpl.libxrpl.ledger PUBLIC
   xrpl.libxrpl.basics
   xrpl.libxrpl.json
   xrpl.libxrpl.protocol
+  xrpl.libxrpl.rdb
 )
 
 add_library(xrpl.libxrpl)
@@ -152,15 +163,16 @@ target_sources(xrpl.libxrpl PRIVATE ${sources})
 target_link_modules(xrpl PUBLIC
   basics
   beast
-  core
   crypto
   json
   protocol
+  core
   resource
-  server
+  net
   nodestore
   shamap
-  net
+  rdb
+  server
   ledger
 )
 

cmake/XrplInstall.cmake

@@ -19,6 +19,7 @@ install (
     xrpl.libxrpl.core
     xrpl.libxrpl.crypto
     xrpl.libxrpl.json
+    xrpl.libxrpl.rdb
     xrpl.libxrpl.ledger
     xrpl.libxrpl.net
     xrpl.libxrpl.nodestore

include/xrpl/core/ServiceRegistry.h

@@ -0,0 +1,228 @@
+#ifndef XRPL_CORE_SERVICEREGISTRY_H_INCLUDED
+#define XRPL_CORE_SERVICEREGISTRY_H_INCLUDED
+
+#include <xrpl/basics/Blob.h>
+#include <xrpl/basics/SHAMapHash.h>
+#include <xrpl/basics/TaggedCache.h>
+#include <xrpl/ledger/CachedSLEs.h>
+#include <xrpl/protocol/Protocol.h>
+
+#include <boost/asio.hpp>
+
+#include <cstdint>
+#include <memory>
+
+namespace xrpl {
+
+// Forward declarations
+namespace NodeStore {
+class Database;
+}
+namespace Resource {
+class Manager;
+}
+namespace perf {
+class PerfLog;
+}
+
+class AcceptedLedger;
+class AmendmentTable;
+class Application;
+class Cluster;
+class CollectorManager;
+class DatabaseCon;
+class Family;
+class HashRouter;
+class InboundLedgers;
+class InboundTransactions;
+class JobQueue;
+class LedgerCleaner;
+class LedgerMaster;
+class LedgerReplayer;
+class LoadFeeTrack;
+class LoadManager;
+class ManifestCache;
+class NetworkOPs;
+class OpenLedger;
+class OrderBookDB;
+class Overlay;
+class PathRequests;
+class PeerReservationTable;
+class PendingSaves;
+class RelationalDatabase;
+class ServerHandler;
+class SHAMapStore;
+class TimeKeeper;
+class TransactionMaster;
+class TxQ;
+class ValidatorList;
+class ValidatorSite;
+
+template <class Adaptor>
+class Validations;
+class RCLValidationsAdaptor;
+using RCLValidations = Validations<RCLValidationsAdaptor>;
+
+using NodeCache = TaggedCache<SHAMapHash, Blob>;
+
+/** Service registry for dependency injection.
+
+    This abstract interface provides access to various services and components
+    used throughout the application. It separates the service locator pattern
+    from the Application lifecycle management.
+
+    Components that need access to services can hold a reference to
+    ServiceRegistry rather than Application when they only need service
+    access and not lifecycle management.
+
+    The implementation (ServiceRegistryImpl) is provided in xrpld.
+*/
+class ServiceRegistry
+{
+public:
+    ServiceRegistry() = default;
+    virtual ~ServiceRegistry() = default;
+
+    // Core infrastructure services
+    virtual CollectorManager&
+    getCollectorManager() = 0;
+
+    virtual Family&
+    getNodeFamily() = 0;
+
+    virtual TimeKeeper&
+    timeKeeper() = 0;
+
+    virtual JobQueue&
+    getJobQueue() = 0;
+
+    virtual NodeCache&
+    getTempNodeCache() = 0;
+
+    virtual CachedSLEs&
+    cachedSLEs() = 0;
+
+    // Protocol and validation services
+    virtual AmendmentTable&
+    getAmendmentTable() = 0;
+
+    virtual HashRouter&
+    getHashRouter() = 0;
+
+    virtual LoadFeeTrack&
+    getFeeTrack() = 0;
+
+    virtual LoadManager&
+    getLoadManager() = 0;
+
+    virtual RCLValidations&
+    getValidations() = 0;
+
+    virtual ValidatorList&
+    validators() = 0;
+
+    virtual ValidatorSite&
+    validatorSites() = 0;
+
+    virtual ManifestCache&
+    validatorManifests() = 0;
+
+    virtual ManifestCache&
+    publisherManifests() = 0;
+
+    // Network services
+    virtual Overlay&
+    overlay() = 0;
+
+    virtual Cluster&
+    cluster() = 0;
+
+    virtual PeerReservationTable&
+    peerReservations() = 0;
+
+    virtual Resource::Manager&
+    getResourceManager() = 0;
+
+    // Storage services
+    virtual NodeStore::Database&
+    getNodeStore() = 0;
+
+    virtual SHAMapStore&
+    getSHAMapStore() = 0;
+
+    virtual RelationalDatabase&
+    getRelationalDatabase() = 0;
+
+    // Ledger services
+    virtual InboundLedgers&
+    getInboundLedgers() = 0;
+
+    virtual InboundTransactions&
+    getInboundTransactions() = 0;
+
+    virtual TaggedCache<uint256, AcceptedLedger>&
+    getAcceptedLedgerCache() = 0;
+
+    virtual LedgerMaster&
+    getLedgerMaster() = 0;
+
+    virtual LedgerCleaner&
+    getLedgerCleaner() = 0;
+
+    virtual LedgerReplayer&
+    getLedgerReplayer() = 0;
+
+    virtual PendingSaves&
+    pendingSaves() = 0;
+
+    virtual OpenLedger&
+    openLedger() = 0;
+
+    virtual OpenLedger const&
+    openLedger() const = 0;
+
+    // Transaction and operation services
+    virtual NetworkOPs&
+    getOPs() = 0;
+
+    virtual OrderBookDB&
+    getOrderBookDB() = 0;
+
+    virtual TransactionMaster&
+    getMasterTransaction() = 0;
+
+    virtual TxQ&
+    getTxQ() = 0;
+
+    virtual PathRequests&
+    getPathRequests() = 0;
+
+    // Server services
+    virtual ServerHandler&
+    getServerHandler() = 0;
+
+    virtual perf::PerfLog&
+    getPerfLog() = 0;
+
+    // Configuration and state
+    virtual bool
+    isStopping() const = 0;
+
+    virtual beast::Journal
+    journal(std::string const& name) = 0;
+
+    virtual boost::asio::io_context&
+    getIOContext() = 0;
+
+    virtual Logs&
+    logs() = 0;
+
+    // Temporary: Get the underlying Application for functions that haven't
+    // been migrated yet. This should be removed once all code is migrated.
+    virtual Application&
+    app() = 0;
+};
+
+}  // namespace xrpl
+
+#endif

include/xrpl/core/StartUpType.h

@@ -0,0 +1,18 @@
+#ifndef XRPL_STARTUPTYPE_H
+#define XRPL_STARTUPTYPE_H
+#include <iosfwd>
+#include <type_traits>
+
+namespace xrpl {
+
+enum class StartUpType { FRESH, NORMAL, LOAD, LOAD_FILE, REPLAY, NETWORK };
+
+inline std::ostream&
+operator<<(std::ostream& os, StartUpType const& type)
+{
+    return os << static_cast<std::underlying_type_t<StartUpType>>(type);
+}
+
+}  // namespace xrpl
+
+#endif  // XRPL_STARTUPTYPE_H

include/xrpl/protocol/LedgerShortcut.h

@@ -0,0 +1,25 @@
+#ifndef XRPL_PROTOCOL_LEDGERSHORTCUT_H_INCLUDED
+#define XRPL_PROTOCOL_LEDGERSHORTCUT_H_INCLUDED
+
+namespace xrpl {
+
+/**
+ * @brief Enumeration of ledger shortcuts for specifying which ledger to use.
+ *
+ * These shortcuts provide a convenient way to reference commonly used ledgers
+ * without needing to specify their exact hash or sequence number.
+ */
+enum class LedgerShortcut {
+    /** The current working ledger (open, not yet closed) */
+    Current,
+
+    /** The most recently closed ledger (may not be validated) */
+    Closed,
+
+    /** The most recently validated ledger */
+    Validated
+};
+
+}  // namespace xrpl
+
+#endif

include/xrpl/protocol/TxSearched.h

@@ -0,0 +1,10 @@
+#ifndef XRPL_APP_TX_TX_SEARCHED_H_INCLUDED
+#define XRPL_APP_TX_TX_SEARCHED_H_INCLUDED
+
+namespace xrpl {
+
+enum class TxSearched { all, some, unknown };
+
+}
+
+#endif

include/xrpl/rdb/DatabaseCon.h

@@ -1,11 +1,10 @@
 #ifndef XRPL_APP_DATA_DATABASECON_H_INCLUDED
 #define XRPL_APP_DATA_DATABASECON_H_INCLUDED
 
-#include <xrpld/app/main/DBInit.h>
-#include <xrpld/core/Config.h>
-#include <xrpld/core/SociDB.h>
-
 #include <xrpl/core/PerfLog.h>
+#include <xrpl/core/StartUpType.h>
+#include <xrpl/rdb/DBInit.h>
+#include <xrpl/rdb/SociDB.h>
 
 #include <boost/filesystem/path.hpp>
 
@@ -71,7 +70,7 @@ public:
     {
         explicit Setup() = default;
 
-        Config::StartUpType startUp = Config::NORMAL;
+        StartUpType startUp = StartUpType::NORMAL;
         bool standAlone = false;
         boost::filesystem::path dataDir;
         // Indicates whether or not to return the `globalPragma`
@@ -109,9 +108,9 @@ public:
         beast::Journal journal)
         // Use temporary files or regular DB files?
         : DatabaseCon(
-              setup.standAlone && setup.startUp != Config::LOAD &&
-                      setup.startUp != Config::LOAD_FILE &&
-                      setup.startUp != Config::REPLAY
+              setup.standAlone && setup.startUp != StartUpType::LOAD &&
+                      setup.startUp != StartUpType::LOAD_FILE &&
+                      setup.startUp != StartUpType::REPLAY
                   ? ""
                   : (setup.dataDir / dbName),
               setup.commonPragma(),
@@ -237,11 +236,6 @@ private:
 std::shared_ptr<Checkpointer>
 checkpointerFromId(std::uintptr_t id);
 
-DatabaseCon::Setup
-setup_DatabaseCon(
-    Config const& c,
-    std::optional<beast::Journal> j = std::nullopt);
-
 }  // namespace xrpl
 
 #endif

include/xrpl/rdb/RelationalDatabase.h

@@ -0,0 +1,488 @@
+#ifndef XRPL_APP_RDB_RELATIONALDATABASE_H_INCLUDED
+#define XRPL_APP_RDB_RELATIONALDATABASE_H_INCLUDED
+
+#include <xrpl/basics/RangeSet.h>
+#include <xrpl/beast/utility/instrumentation.h>
+#include <xrpl/core/ServiceRegistry.h>
+#include <xrpl/protocol/ErrorCodes.h>
+#include <xrpl/protocol/LedgerHeader.h>
+#include <xrpl/protocol/LedgerShortcut.h>
+#include <xrpl/protocol/TxMeta.h>
+#include <xrpl/protocol/TxSearched.h>
+#include <xrpl/rdb/DatabaseCon.h>
+
+#include <boost/filesystem.hpp>
+#include <boost/variant.hpp>
+
+namespace xrpl {
+
+class Transaction;
+class Ledger;
+
+struct LedgerHashPair
+{
+    uint256 ledgerHash;
+    uint256 parentHash;
+};
+
+struct LedgerRange
+{
+    uint32_t min;
+    uint32_t max;
+};
+
+class RelationalDatabase
+{
+public:
+    struct CountMinMax
+    {
+        std::size_t numberOfRows;
+        LedgerIndex minLedgerSequence;
+        LedgerIndex maxLedgerSequence;
+    };
+
+    struct AccountTxMarker
+    {
+        std::uint32_t ledgerSeq = 0;
+        std::uint32_t txnSeq = 0;
+    };
+
+    struct AccountTxOptions
+    {
+        AccountID const& account;
+        std::uint32_t minLedger;
+        std::uint32_t maxLedger;
+        std::uint32_t offset;
+        std::uint32_t limit;
+        bool bUnlimited;
+    };
+
+    struct AccountTxPageOptions
+    {
+        AccountID const& account;
+        std::uint32_t minLedger;
+        std::uint32_t maxLedger;
+        std::optional<AccountTxMarker> marker;
+        std::uint32_t limit;
+        bool bAdmin;
+    };
+
+    using AccountTx =
+        std::pair<std::shared_ptr<Transaction>, std::shared_ptr<TxMeta>>;
+    using AccountTxs = std::vector<AccountTx>;
+    using txnMetaLedgerType = std::tuple<Blob, Blob, std::uint32_t>;
+    using MetaTxsList = std::vector<txnMetaLedgerType>;
+
+    using LedgerSequence = uint32_t;
+    using LedgerHash = uint256;
+    using LedgerSpecifier =
+        std::variant<LedgerRange, LedgerShortcut, LedgerSequence, LedgerHash>;
+
+    struct AccountTxArgs
+    {
+        AccountID account;
+        std::optional<LedgerSpecifier> ledger;
+        bool binary = false;
+        bool forward = false;
+        uint32_t limit = 0;
+        std::optional<AccountTxMarker> marker;
+    };
+
+    struct AccountTxResult
+    {
+        std::variant<AccountTxs, MetaTxsList> transactions;
+        LedgerRange ledgerRange;
+        uint32_t limit;
+        std::optional<AccountTxMarker> marker;
+    };
+
+    virtual ~RelationalDatabase() = default;
+
+    /**
+     * @brief getMinLedgerSeq Returns the minimum ledger sequence in the Ledgers
+     *        table.
+     * @return Ledger sequence or no value if no ledgers exist.
+     */
+    virtual std::optional<LedgerIndex>
+    getMinLedgerSeq() = 0;
+
+    /**
+     * @brief getMaxLedgerSeq Returns the maximum ledger sequence in the Ledgers
+     *        table.
+     * @return Ledger sequence or none if no ledgers exist.
+     */
+    virtual std::optional<LedgerIndex>
+    getMaxLedgerSeq() = 0;
+
+    /**
+     * @brief getLedgerInfoByIndex Returns a ledger by its sequence.
+     * @param ledgerSeq Ledger sequence.
+     * @return The ledger if found, otherwise no value.
+     */
+    virtual std::optional<LedgerHeader>
+    getLedgerInfoByIndex(LedgerIndex ledgerSeq) = 0;
+
+    /**
+     * @brief getNewestLedgerInfo Returns the info of the newest saved ledger.
+     * @return Ledger info if found, otherwise no value.
+     */
+    virtual std::optional<LedgerHeader>
+    getNewestLedgerInfo() = 0;
+
+    /**
+     * @brief getLedgerInfoByHash Returns the info of the ledger with given
+     *        hash.
+     * @param ledgerHash Hash of the ledger.
+     * @return Ledger if found, otherwise no value.
+     */
+    virtual std::optional<LedgerHeader>
+    getLedgerInfoByHash(uint256 const& ledgerHash) = 0;
+
+    /**
+     * @brief getHashByIndex Returns the hash of the ledger with the given
+     *        sequence.
+     * @param ledgerIndex Ledger sequence.
+     * @return Hash of the ledger.
+     */
+    virtual uint256
+    getHashByIndex(LedgerIndex ledgerIndex) = 0;
+
+    /**
+     * @brief getHashesByIndex Returns the hashes of the ledger and its parent
+     *        as specified by the ledgerIndex.
+     * @param ledgerIndex Ledger sequence.
+     * @return Struct LedgerHashPair which contains hashes of the ledger and
+     *         its parent.
+     */
+    virtual std::optional<LedgerHashPair>
+    getHashesByIndex(LedgerIndex ledgerIndex) = 0;
+
+    /**
+     * @brief getHashesByIndex Returns hashes of each ledger and its parent for
+     *        all ledgers within the provided range.
+     * @param minSeq Minimum ledger sequence.
+     * @param maxSeq Maximum ledger sequence.
+     * @return Container that maps the sequence number of a found ledger to the
+     *         struct LedgerHashPair which contains the hashes of the ledger and
+     *         its parent.
+     */
+    virtual std::map<LedgerIndex, LedgerHashPair>
+    getHashesByIndex(LedgerIndex minSeq, LedgerIndex maxSeq) = 0;
+
+    /**
+     * @brief getTxHistory Returns the 20 most recent transactions starting from
+     *        the given number.
+     * @param startIndex First number of returned entry.
+     * @return Vector of shared pointers to transactions sorted in
+     *         descending order by ledger sequence.
+     */
+    virtual std::vector<std::shared_ptr<Transaction>>
+    getTxHistory(LedgerIndex startIndex) = 0;
+
+    /**
+     * @brief getTransactionsMinLedgerSeq Returns the minimum ledger sequence
+     *        stored in the Transactions table.
+     * @return Ledger sequence or no value if no ledgers exist.
+     */
+    virtual std::optional<LedgerIndex>
+    getTransactionsMinLedgerSeq() = 0;
+
+    /**
+     * @brief getAccountTransactionsMinLedgerSeq Returns the minimum ledger
+     *        sequence stored in the AccountTransactions table.
+     * @return Ledger sequence or no value if no ledgers exist.
+     */
+    virtual std::optional<LedgerIndex>
+    getAccountTransactionsMinLedgerSeq() = 0;
+
+    /**
+     * @brief deleteTransactionByLedgerSeq Deletes transactions from the ledger
+     *        with the given sequence.
+     * @param ledgerSeq Ledger sequence.
+     */
+    virtual void
+    deleteTransactionByLedgerSeq(LedgerIndex ledgerSeq) = 0;
+
+    /**
+     * @brief deleteBeforeLedgerSeq Deletes all ledgers with a sequence number
+     *        less than or equal to the given ledger sequence.
+     * @param ledgerSeq Ledger sequence.
+     */
+    virtual void
+    deleteBeforeLedgerSeq(LedgerIndex ledgerSeq) = 0;
+
+    /**
+     * @brief deleteTransactionsBeforeLedgerSeq Deletes all transactions with
+     *        a sequence number less than or equal to the given ledger
+     *        sequence.
+     * @param ledgerSeq Ledger sequence.
+     */
+    virtual void
+    deleteTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq) = 0;
+
+    /**
+     * @brief deleteAccountTransactionsBeforeLedgerSeq Deletes all account
+     *        transactions with a sequence number less than or equal to the
+     *        given ledger sequence.
+     * @param ledgerSeq Ledger sequence.
+     */
+    virtual void
+    deleteAccountTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq) = 0;
+
+    /**
+     * @brief getTransactionCount Returns the number of transactions.
+     * @return Number of transactions.
+     */
+    virtual std::size_t
+    getTransactionCount() = 0;
+
+    /**
+     * @brief getAccountTransactionCount Returns the number of account
+     *        transactions.
+     * @return Number of account transactions.
+     */
+    virtual std::size_t
+    getAccountTransactionCount() = 0;
+
+    /**
+     * @brief getLedgerCountMinMax Returns the minimum ledger sequence,
+     *        maximum ledger sequence and total number of saved ledgers.
+     * @return Struct CountMinMax which contains the minimum sequence,
+     *         maximum sequence and number of ledgers.
+     */
+    virtual struct CountMinMax
+    getLedgerCountMinMax() = 0;
+
+    /**
+     * @brief saveValidatedLedger Saves a ledger into the database.
+     * @param ledger The ledger.
+     * @param current True if the ledger is current.
+     * @return True if saving was successful.
+     */
+    virtual bool
+    saveValidatedLedger(
+        std::shared_ptr<Ledger const> const& ledger,
+        bool current) = 0;
+
+    /**
+     * @brief getLimitedOldestLedgerInfo Returns the info of the oldest ledger
+     *        whose sequence number is greater than or equal to the given
+     *        sequence number.
+     * @param ledgerFirstIndex Minimum ledger sequence.
+     * @return Ledger info if found, otherwise no value.
+     */
+    virtual std::optional<LedgerHeader>
+    getLimitedOldestLedgerInfo(LedgerIndex ledgerFirstIndex) = 0;
+
+    /**
+     * @brief getLimitedNewestLedgerInfo Returns the info of the newest ledger
+     *        whose sequence number is greater than or equal to the given
+     *        sequence number.
+     * @param ledgerFirstIndex Minimum ledger sequence.
+     * @return Ledger info if found, otherwise no value.
+     */
+    virtual std::optional<LedgerHeader>
+    getLimitedNewestLedgerInfo(LedgerIndex ledgerFirstIndex) = 0;
+
+    /**
+     * @brief getOldestAccountTxs Returns the oldest transactions for the
+     *        account that matches the given criteria starting from the provided
+     *        offset.
+     * @param options Struct AccountTxOptions which contains the criteria to
+     *        match: the account, ledger search range, the offset of the first
+     *        entry to return, the number of transactions to return, a flag if
+     *        this number is unlimited.
+     * @return Vector of pairs of found transactions and their metadata
+     *         sorted in ascending order by account sequence.
+     */
+    virtual AccountTxs
+    getOldestAccountTxs(AccountTxOptions const& options) = 0;
+
+    /**
+     * @brief getNewestAccountTxs Returns the newest transactions for the
+     *        account that matches the given criteria starting from the provided
+     *        offset.
+     * @param options Struct AccountTxOptions which contains the criteria to
+     *        match: the account, the ledger search range, the offset of  the
+     *        first entry to return, the number of transactions to return, a
+     *        flag if this number unlimited.
+     * @return Vector of pairs of found transactions and their metadata
+     *         sorted in descending order by account sequence.
+     */
+    virtual AccountTxs
+    getNewestAccountTxs(AccountTxOptions const& options) = 0;
+
+    /**
+     * @brief getOldestAccountTxsB Returns the oldest transactions in binary
+     *        form for the account that matches the given criteria starting from
+     *        the provided offset.
+     * @param options Struct AccountTxOptions which contains the criteria to
+     *        match: the account, the ledger search range, the offset of the
+     *        first entry to return, the number of transactions to return, a
+     *        flag if this number unlimited.
+     * @return Vector of tuples of found transactions, their metadata and
+     *         account sequences sorted in ascending order by account sequence.
+     */
+    virtual MetaTxsList
+    getOldestAccountTxsB(AccountTxOptions const& options) = 0;
+
+    /**
+     * @brief getNewestAccountTxsB Returns the newest transactions in binary
+     *        form for the account that matches the given criteria starting from
+     *        the provided offset.
+     * @param options Struct AccountTxOptions which contains the criteria to
+     *        match: the account, the ledger search range, the offset of the
+     *        first entry to return, the number of transactions to return, a
+     *        flag if this number is unlimited.
+     * @return Vector of tuples of found transactions, their metadata and
+     *         account sequences sorted in descending order by account
+     *         sequence.
+     */
+    virtual MetaTxsList
+    getNewestAccountTxsB(AccountTxOptions const& options) = 0;
+
+    /**
+     * @brief oldestAccountTxPage Returns the oldest transactions for the
+     *        account that matches the given criteria starting from the
+     *        provided marker.
+     * @param options Struct AccountTxPageOptions which contains the criteria to
+     *        match: the account, the ledger search range, the marker of first
+     *        returned entry, the number of transactions to return, a flag if
+     *        this number is unlimited.
+     * @return Vector of pairs of found transactions and their metadata
+     *         sorted in ascending order by account sequence and a marker
+     *         for the next search if the search was not finished.
+     */
+    virtual std::pair<AccountTxs, std::optional<AccountTxMarker>>
+    oldestAccountTxPage(AccountTxPageOptions const& options) = 0;
+
+    /**
+     * @brief newestAccountTxPage Returns the newest transactions for the
+     *        account that matches the given criteria starting from the provided
+     *        marker.
+     * @param options Struct AccountTxPageOptions which contains the criteria to
+     *        match: the account, the ledger search range, the marker of the
+     *        first returned entry, the number of transactions to return, a flag
+     *        if this number unlimited.
+     * @return Vector of pairs of found transactions and their metadata
+     *         sorted in descending order by account sequence and a marker
+     *         for the next search if the search was not finished.
+     */
+    virtual std::pair<AccountTxs, std::optional<AccountTxMarker>>
+    newestAccountTxPage(AccountTxPageOptions const& options) = 0;
+
+    /**
+     * @brief oldestAccountTxPageB Returns the oldest transactions in binary
+     *        form for the account that matches the given criteria starting from
+     *        the provided marker.
+     * @param options Struct AccountTxPageOptions which contains criteria to
+     *        match: the account, the ledger search range, the marker of the
+     *        first returned entry, the number of transactions to return, a flag
+     *        if this number unlimited.
+     * @return Vector of tuples of found transactions, their metadata and
+     *         account sequences sorted in ascending order by account
+     *         sequence and a marker for the next search if the search was not
+     *         finished.
+     */
+    virtual std::pair<MetaTxsList, std::optional<AccountTxMarker>>
+    oldestAccountTxPageB(AccountTxPageOptions const& options) = 0;
+
+    /**
+     * @brief newestAccountTxPageB Returns the newest transactions in binary
+     *        form for the account that matches the given criteria starting from
+     *        the provided marker.
+     * @param options Struct AccountTxPageOptions which contains the criteria to
+     *        match: the account, the ledger search range, the marker of the
+     *        first returned entry, the number of transactions to return, a flag
+     *        if this number is unlimited.
+     * @return Vector of tuples of found transactions, their metadata and
+     *         account sequences sorted in descending order by account
+     *         sequence and a marker for the next search if the search was not
+     *         finished.
+     */
+    virtual std::pair<MetaTxsList, std::optional<AccountTxMarker>>
+    newestAccountTxPageB(AccountTxPageOptions const& options) = 0;
+
+    /**
+     * @brief getTransaction Returns the transaction with the given hash. If a
+     *        range is provided but the transaction is not found, then check if
+     *        all ledgers in the range are present in the database.
+     * @param id Hash of the transaction.
+     * @param range Range of ledgers to check, if present.
+     * @param ec Default error code value.
+     * @return Transaction and its metadata if found, otherwise TxSearched::all
+     *         if a range is provided and all ledgers from the range are present
+     *         in the database, TxSearched::some if a range is provided and not
+     *         all ledgers are present, TxSearched::unknown if the range is not
+     *         provided or a deserializing error occurred. In the last case the
+     *         error code is returned via the ec parameter, in other cases the
+     *         default error code is not changed.
+     */
+    virtual std::variant<AccountTx, TxSearched>
+    getTransaction(
+        uint256 const& id,
+        std::optional<ClosedInterval<uint32_t>> const& range,
+        error_code_i& ec) = 0;
+
+    /**
+     * @brief getKBUsedAll Returns the amount of space used by all databases.
+     * @return Space in kilobytes.
+     */
+    virtual uint32_t
+    getKBUsedAll() = 0;
+
+    /**
+     * @brief getKBUsedLedger Returns the amount of space space used by the
+     *        ledger database.
+     * @return Space in kilobytes.
+     */
+    virtual uint32_t
+    getKBUsedLedger() = 0;
+
+    /**
+     * @brief getKBUsedTransaction Returns the amount of space used by the
+     *        transaction database.
+     * @return Space in kilobytes.
+     */
+    virtual uint32_t
+    getKBUsedTransaction() = 0;
+
+    /**
+     * @brief Closes the ledger database
+     */
+    virtual void
+    closeLedgerDB() = 0;
+
+    /**
+     * @brief Closes the transaction database
+     */
+    virtual void
+    closeTransactionDB() = 0;
+};
+
+template <class T, class C>
+T
+rangeCheckedCast(C c)
+{
+    if ((c > std::numeric_limits<T>::max()) ||
+        (!std::numeric_limits<T>::is_signed && c < 0) ||
+        (std::numeric_limits<T>::is_signed &&
+         std::numeric_limits<C>::is_signed &&
+         c < std::numeric_limits<T>::lowest()))
+    {
+        // This should never happen
+        // LCOV_EXCL_START
+        UNREACHABLE("xrpl::rangeCheckedCast : domain error");
+        JLOG(debugLog().error())
+            << "rangeCheckedCast domain error:"
+            << " value = " << c << " min = " << std::numeric_limits<T>::lowest()
+            << " max: " << std::numeric_limits<T>::max();
+        // LCOV_EXCL_STOP
+    }
+
+    return static_cast<T>(c);
+}
+
+}  // namespace xrpl
+
+#endif

include/xrpl/server/State.h

@@ -1,11 +1,9 @@
 #ifndef XRPL_APP_RDB_STATE_H_INCLUDED
 #define XRPL_APP_RDB_STATE_H_INCLUDED
 
-#include <xrpld/app/ledger/Ledger.h>
-#include <xrpld/app/misc/Manifest.h>
-#include <xrpld/core/Config.h>
-#include <xrpld/core/DatabaseCon.h>
-#include <xrpld/peerfinder/detail/Store.h>
+#include <xrpl/protocol/Protocol.h>
+#include <xrpl/rdb/DatabaseCon.h>
+#include <xrpl/server/Manifest.h>
 
 #include <boost/filesystem.hpp>
 

include/xrpl/server/Vacuum.h

@@ -1,7 +1,7 @@
 #ifndef XRPL_APP_RDB_VACUUM_H_INCLUDED
 #define XRPL_APP_RDB_VACUUM_H_INCLUDED
 
-#include <xrpld/core/DatabaseCon.h>
+#include <xrpl/rdb/DatabaseCon.h>
 
 namespace xrpl {
 

include/xrpl/server/Wallet.h

@@ -1,10 +1,9 @@
 #ifndef XRPL_APP_RDB_WALLET_H_INCLUDED
 #define XRPL_APP_RDB_WALLET_H_INCLUDED
 
-#include <xrpld/app/misc/Manifest.h>
-#include <xrpld/core/Config.h>
-#include <xrpld/core/DatabaseCon.h>
-#include <xrpld/overlay/PeerReservationTable.h>
+#include <xrpl/core/PeerReservationTable.h>
+#include <xrpl/rdb/DatabaseCon.h>
+#include <xrpl/server/Manifest.h>
 
 namespace xrpl {
 

src/libxrpl/rdb/DatabaseCon.cpp

@@ -0,0 +1,97 @@
+#include <xrpl/basics/Log.h>
+#include <xrpl/basics/contract.h>
+#include <xrpl/rdb/DatabaseCon.h>
+#include <xrpl/rdb/SociDB.h>
+
+#include <boost/algorithm/string.hpp>
+#include <boost/format.hpp>
+
+#include <memory>
+#include <unordered_map>
+
+namespace xrpl {
+
+class CheckpointersCollection
+{
+    std::uintptr_t nextId_{0};
+    // Mutex protects the CheckpointersCollection
+    std::mutex mutex_;
+    // Each checkpointer is given a unique id. All the checkpointers that are
+    // part of a DatabaseCon are part of this collection. When the DatabaseCon
+    // is destroyed, its checkpointer is removed from the collection
+    std::unordered_map<std::uintptr_t, std::shared_ptr<Checkpointer>>
+        checkpointers_;
+
+public:
+    std::shared_ptr<Checkpointer>
+    fromId(std::uintptr_t id)
+    {
+        std::lock_guard l{mutex_};
+        auto it = checkpointers_.find(id);
+        if (it != checkpointers_.end())
+            return it->second;
+        return {};
+    }
+
+    void
+    erase(std::uintptr_t id)
+    {
+        std::lock_guard lock{mutex_};
+        checkpointers_.erase(id);
+    }
+
+    std::shared_ptr<Checkpointer>
+    create(
+        std::shared_ptr<soci::session> const& session,
+        JobQueue& jobQueue,
+        Logs& logs)
+    {
+        std::lock_guard lock{mutex_};
+        auto const id = nextId_++;
+        auto const r = makeCheckpointer(id, session, jobQueue, logs);
+        checkpointers_[id] = r;
+        return r;
+    }
+};
+
+CheckpointersCollection checkpointers;
+
+std::shared_ptr<Checkpointer>
+checkpointerFromId(std::uintptr_t id)
+{
+    return checkpointers.fromId(id);
+}
+
+DatabaseCon::~DatabaseCon()
+{
+    if (checkpointer_)
+    {
+        checkpointers.erase(checkpointer_->id());
+
+        std::weak_ptr<Checkpointer> wk(checkpointer_);
+        checkpointer_.reset();
+
+        // The references to our Checkpointer held by 'checkpointer_' and
+        // 'checkpointers' have been removed, so if the use count is nonzero, a
+        // checkpoint is currently in progress. Wait for it to end, otherwise
+        // creating a new DatabaseCon to the same database may fail due to the
+        // database being locked by our (now old) Checkpointer.
+        while (wk.use_count())
+        {
+            std::this_thread::sleep_for(std::chrono::milliseconds(100));
+        }
+    }
+}
+
+std::unique_ptr<std::vector<std::string> const>
+    DatabaseCon::Setup::globalPragma;
+
+void
+DatabaseCon::setupCheckpointing(JobQueue* q, Logs& l)
+{
+    if (!q)
+        Throw<std::logic_error>("No JobQueue");
+    checkpointer_ = checkpointers.create(session_, *q, l);
+}
+
+}  // namespace xrpl

src/libxrpl/rdb/SociDB.cpp

@@ -3,12 +3,10 @@
 #pragma clang diagnostic ignored "-Wdeprecated"
 #endif
 
-#include <xrpld/core/Config.h>
-#include <xrpld/core/DatabaseCon.h>
-#include <xrpld/core/SociDB.h>
-
 #include <xrpl/basics/ByteUtilities.h>
 #include <xrpl/basics/contract.h>
+#include <xrpl/rdb/DatabaseCon.h>
+#include <xrpl/rdb/SociDB.h>
 
 #include <boost/filesystem.hpp>
 

src/libxrpl/server/State.cpp

@@ -1,4 +1,4 @@
-#include <xrpld/app/rdb/State.h>
+#include <xrpl/server/State.h>
 
 namespace xrpl {
 

src/libxrpl/server/Vacuum.cpp

@@ -1,7 +1,9 @@
-#include <xrpld/app/rdb/Vacuum.h>
+#include <xrpl/server/Vacuum.h>
 
 #include <boost/format.hpp>
 
+#include <iostream>
+
 namespace xrpl {
 
 bool

src/libxrpl/server/Wallet.cpp

@@ -1,4 +1,5 @@
-#include <xrpld/app/rdb/Wallet.h>
+#include <xrpl/rdb/DBInit.h>
+#include <xrpl/server/Wallet.h>
 
 #include <boost/format.hpp>
 

src/test/app/LedgerLoad_test.cpp

@@ -21,7 +21,7 @@ class LedgerLoad_test : public beast::unit_test::suite
         std::unique_ptr<Config> cfg,
         std::string const& dbPath,
         std::string const& ledger,
-        Config::StartUpType type,
+        StartUpType type,
         std::optional<uint256> trapTxHash)
     {
         cfg->START_LEDGER = ledger;
@@ -113,7 +113,7 @@ class LedgerLoad_test : public beast::unit_test::suite
                 ledgerConfig,
                 sd.dbPath,
                 sd.ledgerFile,
-                Config::LOAD_FILE,
+                StartUpType::LOAD_FILE,
                 std::nullopt),
             nullptr,
             beast::severities::kDisabled);
@@ -138,7 +138,7 @@ class LedgerLoad_test : public beast::unit_test::suite
                     ledgerConfig,
                     sd.dbPath,
                     "",
-                    Config::LOAD_FILE,
+                    StartUpType::LOAD_FILE,
                     std::nullopt),
                 nullptr,
                 beast::severities::kDisabled);
@@ -152,7 +152,7 @@ class LedgerLoad_test : public beast::unit_test::suite
                     ledgerConfig,
                     sd.dbPath,
                     "badfile.json",
-                    Config::LOAD_FILE,
+                    StartUpType::LOAD_FILE,
                     std::nullopt),
                 nullptr,
                 beast::severities::kDisabled);
@@ -183,7 +183,7 @@ class LedgerLoad_test : public beast::unit_test::suite
                     ledgerConfig,
                     sd.dbPath,
                     ledgerFileCorrupt.string(),
-                    Config::LOAD_FILE,
+                    StartUpType::LOAD_FILE,
                     std::nullopt),
                 nullptr,
                 beast::severities::kDisabled);
@@ -205,7 +205,7 @@ class LedgerLoad_test : public beast::unit_test::suite
                 ledgerConfig,
                 sd.dbPath,
                 ledgerHash,
-                Config::LOAD,
+                StartUpType::LOAD,
                 std::nullopt),
             nullptr,
             beast::severities::kDisabled);
@@ -231,7 +231,7 @@ class LedgerLoad_test : public beast::unit_test::suite
                 ledgerConfig,
                 sd.dbPath,
                 ledgerHash,
-                Config::REPLAY,
+                StartUpType::REPLAY,
                 std::nullopt),
             nullptr,
             beast::severities::kDisabled);
@@ -262,7 +262,7 @@ class LedgerLoad_test : public beast::unit_test::suite
                 ledgerConfig,
                 sd.dbPath,
                 ledgerHash,
-                Config::REPLAY,
+                StartUpType::REPLAY,
                 sd.trapTxHash),
             nullptr,
             beast::severities::kDisabled);
@@ -297,7 +297,7 @@ class LedgerLoad_test : public beast::unit_test::suite
                     ledgerConfig,
                     sd.dbPath,
                     ledgerHash,
-                    Config::REPLAY,
+                    StartUpType::REPLAY,
                     ~sd.trapTxHash),
                 nullptr,
                 beast::severities::kDisabled);
@@ -323,7 +323,11 @@ class LedgerLoad_test : public beast::unit_test::suite
         Env env(
             *this,
             envconfig(
-                ledgerConfig, sd.dbPath, "latest", Config::LOAD, std::nullopt),
+                ledgerConfig,
+                sd.dbPath,
+                "latest",
+                StartUpType::LOAD,
+                std::nullopt),
             nullptr,
             beast::severities::kDisabled);
         auto jrb = env.rpc("ledger", "current", "full")[jss::result];
@@ -342,7 +346,7 @@ class LedgerLoad_test : public beast::unit_test::suite
         Env env(
             *this,
             envconfig(
-                ledgerConfig, sd.dbPath, "43", Config::LOAD, std::nullopt),
+                ledgerConfig, sd.dbPath, "43", StartUpType::LOAD, std::nullopt),
             nullptr,
             beast::severities::kDisabled);
         auto jrb = env.rpc("ledger", "current", "full")[jss::result];

src/test/app/Manifest_test.cpp

@@ -1,15 +1,15 @@
 #include <test/jtx.h>
 
-#include <xrpld/app/main/DBInit.h>
-#include <xrpld/app/misc/Manifest.h>
 #include <xrpld/app/misc/ValidatorList.h>
-#include <xrpld/app/rdb/Wallet.h>
 
 #include <xrpl/basics/base64.h>
 #include <xrpl/basics/contract.h>
 #include <xrpl/protocol/STExchange.h>
 #include <xrpl/protocol/SecretKey.h>
 #include <xrpl/protocol/Sign.h>
+#include <xrpl/rdb/DBInit.h>
+#include <xrpl/server/Manifest.h>
+#include <xrpl/server/Wallet.h>
 
 #include <boost/algorithm/string.hpp>
 #include <boost/filesystem.hpp>

src/test/app/SHAMapStore_test.cpp

@@ -106,8 +106,7 @@ class SHAMapStore_test : public beast::unit_test::suite
     ledgerCheck(jtx::Env& env, int const rows, int const first)
     {
         auto const [actualRows, actualFirst, actualLast] =
-            dynamic_cast<SQLiteDatabase*>(&env.app().getRelationalDatabase())
-                ->getLedgerCountMinMax();
+            env.app().getRelationalDatabase().getLedgerCountMinMax();
 
         BEAST_EXPECT(actualRows == rows);
         BEAST_EXPECT(actualFirst == first);
@@ -118,16 +117,15 @@ class SHAMapStore_test : public beast::unit_test::suite
     transactionCheck(jtx::Env& env, int const rows)
     {
         BEAST_EXPECT(
-            dynamic_cast<SQLiteDatabase*>(&env.app().getRelationalDatabase())
-                ->getTransactionCount() == rows);
+            env.app().getRelationalDatabase().getTransactionCount() == rows);
     }
 
     void
     accountTransactionCheck(jtx::Env& env, int const rows)
     {
         BEAST_EXPECT(
-            dynamic_cast<SQLiteDatabase*>(&env.app().getRelationalDatabase())
-                ->getAccountTransactionCount() == rows);
+            env.app().getRelationalDatabase().getAccountTransactionCount() ==
+            rows);
     }
 
     int

src/test/app/ValidatorKeys_test.cpp

@@ -1,12 +1,12 @@
 #include <test/jtx/Env.h>
 
-#include <xrpld/app/misc/Manifest.h>
 #include <xrpld/app/misc/ValidatorKeys.h>
 #include <xrpld/core/Config.h>
 #include <xrpld/core/ConfigSections.h>
 
 #include <xrpl/basics/base64.h>
 #include <xrpl/beast/unit_test.h>
+#include <xrpl/server/Manifest.h>
 
 #include <string>
 

src/test/core/SociDB_test.cpp

@@ -1,9 +1,8 @@
 #include <test/jtx/TestSuite.h>
 
-#include <xrpld/core/SociDB.h>
-
 #include <xrpl/basics/BasicConfig.h>
 #include <xrpl/basics/contract.h>
+#include <xrpl/rdb/SociDB.h>
 
 #include <boost/algorithm/string.hpp>
 #include <boost/filesystem.hpp>

src/test/nodestore/Database_test.cpp

@@ -4,11 +4,10 @@
 #include <test/nodestore/TestBase.h>
 #include <test/unit_test/SuiteJournal.h>
 
-#include <xrpld/core/DatabaseCon.h>
-
 #include <xrpl/beast/utility/temp_dir.h>
 #include <xrpl/nodestore/DummyScheduler.h>
 #include <xrpl/nodestore/Manager.h>
+#include <xrpl/rdb/DatabaseCon.h>
 
 namespace xrpl {
 

src/test/rpc/Transaction_test.cpp

@@ -119,8 +119,8 @@ class Transaction_test : public beast::unit_test::suite
         auto const deletedLedger = (startLegSeq + endLegSeq) / 2;
         {
             // Remove one of the ledgers from the database directly
-            dynamic_cast<SQLiteDatabase*>(&env.app().getRelationalDatabase())
-                ->deleteTransactionByLedgerSeq(deletedLedger);
+            env.app().getRelationalDatabase().deleteTransactionByLedgerSeq(
+                deletedLedger);
         }
 
         for (int deltaEndSeq = 0; deltaEndSeq < 2; ++deltaEndSeq)
@@ -376,8 +376,8 @@ class Transaction_test : public beast::unit_test::suite
         auto const deletedLedger = (startLegSeq + endLegSeq) / 2;
         {
             // Remove one of the ledgers from the database directly
-            dynamic_cast<SQLiteDatabase*>(&env.app().getRelationalDatabase())
-                ->deleteTransactionByLedgerSeq(deletedLedger);
+            env.app().getRelationalDatabase().deleteTransactionByLedgerSeq(
+                deletedLedger);
         }
 
         for (int deltaEndSeq = 0; deltaEndSeq < 2; ++deltaEndSeq)

src/xrpld/app/ledger/Ledger.cpp

@@ -4,10 +4,8 @@
 #include <xrpld/app/ledger/PendingSaves.h>
 #include <xrpld/app/main/Application.h>
 #include <xrpld/app/misc/HashRouter.h>
-#include <xrpld/app/rdb/backend/SQLiteDatabase.h>
 #include <xrpld/consensus/LedgerTiming.h>
 #include <xrpld/core/Config.h>
-#include <xrpld/core/SociDB.h>
 
 #include <xrpl/basics/Log.h>
 #include <xrpl/basics/contract.h>
@@ -23,6 +21,7 @@
 #include <xrpl/protocol/SecretKey.h>
 #include <xrpl/protocol/digest.h>
 #include <xrpl/protocol/jss.h>
+#include <xrpl/rdb/RelationalDatabase.h>
 
 #include <utility>
 #include <vector>
@@ -962,11 +961,9 @@ saveValidatedLedger(
         return true;
     }
 
-    auto const db = dynamic_cast<SQLiteDatabase*>(&app.getRelationalDatabase());
-    if (!db)
-        Throw<std::runtime_error>("Failed to get relational database");
+    auto& db = app.getRelationalDatabase();
 
-    auto const res = db->saveValidatedLedger(ledger, current);
+    auto const res = db.saveValidatedLedger(ledger, current);
 
     // Clients can now trust the database for
     // information about this ledger sequence.

src/xrpld/app/ledger/detail/LedgerMaster.cpp

@@ -14,7 +14,6 @@
 #include <xrpld/app/misc/TxQ.h>
 #include <xrpld/app/misc/ValidatorList.h>
 #include <xrpld/app/paths/PathRequests.h>
-#include <xrpld/app/rdb/RelationalDatabase.h>
 #include <xrpld/core/TimeKeeper.h>
 #include <xrpld/overlay/Overlay.h>
 #include <xrpld/overlay/Peer.h>
@@ -29,6 +28,7 @@
 #include <xrpl/protocol/BuildInfo.h>
 #include <xrpl/protocol/HashPrefix.h>
 #include <xrpl/protocol/digest.h>
+#include <xrpl/rdb/RelationalDatabase.h>
 #include <xrpl/resource/Fees.h>
 
 #include <algorithm>

src/xrpld/app/main/Application.cpp

@@ -11,7 +11,6 @@
 #include <xrpld/app/ledger/TransactionMaster.h>
 #include <xrpld/app/main/Application.h>
 #include <xrpld/app/main/BasicApp.h>
-#include <xrpld/app/main/DBInit.h>
 #include <xrpld/app/main/GRPCServer.h>
 #include <xrpld/app/main/LoadManager.h>
 #include <xrpld/app/main/NodeIdentity.h>
@@ -25,12 +24,10 @@
 #include <xrpld/app/misc/ValidatorKeys.h>
 #include <xrpld/app/misc/ValidatorSite.h>
 #include <xrpld/app/paths/PathRequests.h>
-#include <xrpld/app/rdb/RelationalDatabase.h>
-#include <xrpld/app/rdb/Wallet.h>
+#include <xrpld/app/rdb/backend/SQLiteDatabase.h>
 #include <xrpld/app/tx/apply.h>
-#include <xrpld/core/DatabaseCon.h>
+#include <xrpld/core/ServiceRegistryImpl.h>
 #include <xrpld/overlay/Cluster.h>
-#include <xrpld/overlay/PeerReservationTable.h>
 #include <xrpld/overlay/PeerSet.h>
 #include <xrpld/overlay/make_Overlay.h>
 #include <xrpld/shamap/NodeFamily.h>
@@ -40,6 +37,7 @@
 #include <xrpl/basics/random.h>
 #include <xrpl/beast/asio/io_latency_probe.h>
 #include <xrpl/beast/core/LexicalCast.h>
+#include <xrpl/core/PeerReservationTable.h>
 #include <xrpl/core/PerfLog.h>
 #include <xrpl/crypto/csprng.h>
 #include <xrpl/json/json_reader.h>
@@ -49,7 +47,9 @@
 #include <xrpl/protocol/Feature.h>
 #include <xrpl/protocol/Protocol.h>
 #include <xrpl/protocol/STParsedJSON.h>
+#include <xrpl/rdb/DatabaseCon.h>
 #include <xrpl/resource/Fees.h>
+#include <xrpl/server/Wallet.h>
 
 #include <boost/algorithm/string/predicate.hpp>
 #include <boost/asio/steady_timer.hpp>
@@ -150,6 +150,10 @@ public:
     std::unique_ptr<perf::PerfLog> perfLog_;
     Application::MutexType m_masterMutex;
 
+    // ServiceRegistry implementation that delegates to this Application
+    // Must be declared before m_txMaster since TransactionMaster needs it
+    std::unique_ptr<ServiceRegistryImpl> serviceRegistry_;
+
     // Required by the SHAMapStore
     TransactionMaster m_txMaster;
 
@@ -196,7 +200,7 @@ public:
     boost::asio::steady_timer sweepTimer_;
     boost::asio::steady_timer entropyTimer_;
 
-    std::unique_ptr<RelationalDatabase> mRelationalDatabase;
+    std::unique_ptr<SQLiteDatabase> relationalDatabase_;
     std::unique_ptr<DatabaseCon> mWalletDB;
     std::unique_ptr<Overlay> overlay_;
     std::optional<uint256> trapTxID_;
@@ -267,6 +271,8 @@ public:
               logs_->journal("PerfLog"),
               [this] { signalStop("PerfLog"); }))
 
+        , serviceRegistry_(std::make_unique<ServiceRegistryImpl>(*this))
+
         , m_txMaster(*this)
 
         , m_collectorManager(make_CollectorManager(
@@ -793,10 +799,10 @@ public:
     getRelationalDatabase() override
     {
         XRPL_ASSERT(
-            mRelationalDatabase,
+            relationalDatabase_,
             "xrpl::ApplicationImp::getRelationalDatabase : non-null "
             "relational database");
-        return *mRelationalDatabase;
+        return *relationalDatabase_;
     }
 
     DatabaseCon&
@@ -808,6 +814,16 @@ public:
         return *mWalletDB;
     }
 
+    ServiceRegistry&
+    getServiceRegistry() override
+    {
+        XRPL_ASSERT(
+            serviceRegistry_,
+            "xrpl::ApplicationImp::getServiceRegistry : non-null service "
+            "registry");
+        return *serviceRegistry_;
+    }
+
     bool
     serverOkay(std::string& reason) override;
 
@@ -826,8 +842,8 @@ public:
 
         try
         {
-            mRelationalDatabase =
-                RelationalDatabase::init(*this, *config_, *m_jobQueue);
+            relationalDatabase_ = setup_RelationalDatabase(
+                getServiceRegistry(), *config_, *m_jobQueue);
 
             // wallet database
             auto setup = setup_DatabaseCon(*config_, m_journal);
@@ -953,7 +969,7 @@ public:
     doSweep()
     {
         if (!config_->standalone() &&
-            !getRelationalDatabase().transactionDbHasSpace(*config_))
+            !relationalDatabase_->transactionDbHasSpace(*config_))
         {
             signalStop("Out of transaction DB space");
         }
@@ -1247,22 +1263,22 @@ ApplicationImp::setup(boost::program_options::variables_map const& cmdline)
 
     auto const startUp = config_->START_UP;
     JLOG(m_journal.debug()) << "startUp: " << startUp;
-    if (startUp == Config::FRESH)
+    if (startUp == StartUpType::FRESH)
     {
         JLOG(m_journal.info()) << "Starting new Ledger";
 
         startGenesisLedger();
     }
     else if (
-        startUp == Config::LOAD || startUp == Config::LOAD_FILE ||
-        startUp == Config::REPLAY)
+        startUp == StartUpType::LOAD || startUp == StartUpType::LOAD_FILE ||
+        startUp == StartUpType::REPLAY)
     {
         JLOG(m_journal.info()) << "Loading specified Ledger";
 
         if (!loadOldLedger(
                 config_->START_LEDGER,
-                startUp == Config::REPLAY,
-                startUp == Config::LOAD_FILE,
+                startUp == StartUpType::REPLAY,
+                startUp == StartUpType::LOAD_FILE,
                 config_->TRAP_TX_HASH))
         {
             JLOG(m_journal.error())
@@ -1279,7 +1295,7 @@ ApplicationImp::setup(boost::program_options::variables_map const& cmdline)
             }
         }
     }
-    else if (startUp == Config::NETWORK)
+    else if (startUp == StartUpType::NETWORK)
     {
         // This should probably become the default once we have a stable
         // network.
@@ -1687,8 +1703,9 @@ void
 ApplicationImp::startGenesisLedger()
 {
     std::vector<uint256> const initialAmendments =
-        (config_->START_UP == Config::FRESH) ? m_amendmentTable->getDesired()
-                                             : std::vector<uint256>{};
+        (config_->START_UP == StartUpType::FRESH)
+        ? m_amendmentTable->getDesired()
+        : std::vector<uint256>{};
 
     std::shared_ptr<Ledger> const genesis = std::make_shared<Ledger>(
         create_genesis, *config_, initialAmendments, nodeFamily_);

src/xrpld/app/main/Application.h

@@ -2,10 +2,11 @@
 #define XRPL_APP_MAIN_APPLICATION_H_INCLUDED
 
 #include <xrpld/core/Config.h>
-#include <xrpld/overlay/PeerReservationTable.h>
 
 #include <xrpl/basics/TaggedCache.h>
 #include <xrpl/beast/utility/PropertyStream.h>
+#include <xrpl/core/PeerReservationTable.h>
+#include <xrpl/core/ServiceRegistry.h>
 #include <xrpl/protocol/Protocol.h>
 #include <xrpl/shamap/TreeNodeCache.h>
 
@@ -256,6 +257,9 @@ public:
 
     virtual std::optional<uint256> const&
     trapTxID() const = 0;
+
+    virtual ServiceRegistry&
+    getServiceRegistry() = 0;
 };
 
 std::unique_ptr<Application>

src/xrpld/app/main/Main.cpp

@@ -1,5 +1,4 @@
 #include <xrpld/app/main/Application.h>
-#include <xrpld/app/rdb/Vacuum.h>
 #include <xrpld/core/Config.h>
 #include <xrpld/core/ConfigSections.h>
 #include <xrpld/core/TimeKeeper.h>
@@ -8,6 +7,7 @@
 #include <xrpl/basics/Log.h>
 #include <xrpl/beast/core/CurrentThreadName.h>
 #include <xrpl/protocol/BuildInfo.h>
+#include <xrpl/server/Vacuum.h>
 
 #include <boost/asio/io_context.hpp>
 #include <boost/process/v1/args.hpp>
@@ -642,7 +642,7 @@ run(int argc, char** argv)
 
     if (vm.count("start"))
     {
-        config->START_UP = Config::FRESH;
+        config->START_UP = StartUpType::FRESH;
     }
 
     if (vm.count("import"))
@@ -653,7 +653,7 @@ run(int argc, char** argv)
         config->START_LEDGER = vm["ledger"].as<std::string>();
         if (vm.count("replay"))
         {
-            config->START_UP = Config::REPLAY;
+            config->START_UP = StartUpType::REPLAY;
             if (vm.count("trap_tx_hash"))
             {
                 uint256 tmp = {};
@@ -672,16 +672,16 @@ run(int argc, char** argv)
             }
         }
         else
-            config->START_UP = Config::LOAD;
+            config->START_UP = StartUpType::LOAD;
     }
     else if (vm.count("ledgerfile"))
     {
         config->START_LEDGER = vm["ledgerfile"].as<std::string>();
-        config->START_UP = Config::LOAD_FILE;
+        config->START_UP = StartUpType::LOAD_FILE;
     }
     else if (vm.count("load") || config->FAST_LOAD)
     {
-        config->START_UP = Config::LOAD;
+        config->START_UP = StartUpType::LOAD;
     }
 
     if (vm.count("trap_tx_hash") && vm.count("replay") == 0)
@@ -693,15 +693,15 @@ run(int argc, char** argv)
 
     if (vm.count("net") && !config->FAST_LOAD)
     {
-        if ((config->START_UP == Config::LOAD) ||
-            (config->START_UP == Config::REPLAY))
+        if ((config->START_UP == StartUpType::LOAD) ||
+            (config->START_UP == StartUpType::REPLAY))
         {
             std::cerr << "Net and load/replay options are incompatible"
                       << std::endl;
             return -1;
         }
 
-        config->START_UP = Config::NETWORK;
+        config->START_UP = StartUpType::NETWORK;
     }
 
     if (vm.count("valid"))

src/xrpld/app/main/NodeIdentity.cpp

@@ -1,9 +1,10 @@
 #include <xrpld/app/main/Application.h>
 #include <xrpld/app/main/NodeIdentity.h>
-#include <xrpld/app/rdb/Wallet.h>
 #include <xrpld/core/Config.h>
 #include <xrpld/core/ConfigSections.h>
 
+#include <xrpl/server/Wallet.h>
+
 namespace xrpl {
 
 std::pair<PublicKey, SecretKey>

src/xrpld/app/misc/SHAMapStoreImp.cpp

@@ -1,13 +1,13 @@
 #include <xrpld/app/ledger/TransactionMaster.h>
 #include <xrpld/app/misc/NetworkOPs.h>
 #include <xrpld/app/misc/SHAMapStoreImp.h>
-#include <xrpld/app/rdb/State.h>
 #include <xrpld/app/rdb/backend/SQLiteDatabase.h>
 #include <xrpld/core/ConfigSections.h>
 
 #include <xrpl/beast/core/CurrentThreadName.h>
 #include <xrpl/nodestore/Scheduler.h>
 #include <xrpl/nodestore/detail/DatabaseRotatingImp.h>
+#include <xrpl/server/State.h>
 #include <xrpl/shamap/SHAMapMissingNode.h>
 
 #include <boost/algorithm/string/predicate.hpp>
@@ -570,17 +570,13 @@ SHAMapStoreImp::clearPrior(LedgerIndex lastRotated)
     if (healthWait() == stopping)
         return;
 
-    SQLiteDatabase* const db =
-        dynamic_cast<SQLiteDatabase*>(&app_.getRelationalDatabase());
-
-    if (!db)
-        Throw<std::runtime_error>("Failed to get relational database");
+    auto& db = app_.getRelationalDatabase();
 
     clearSql(
         lastRotated,
         "Ledgers",
-        [db]() -> std::optional<LedgerIndex> { return db->getMinLedgerSeq(); },
-        [db](LedgerIndex min) -> void { db->deleteBeforeLedgerSeq(min); });
+        [&db]() -> std::optional<LedgerIndex> { return db.getMinLedgerSeq(); },
+        [&db](LedgerIndex min) -> void { db.deleteBeforeLedgerSeq(min); });
     if (healthWait() == stopping)
         return;
 
@@ -591,10 +587,10 @@ SHAMapStoreImp::clearPrior(LedgerIndex lastRotated)
         lastRotated,
         "Transactions",
         [&db]() -> std::optional<LedgerIndex> {
-            return db->getTransactionsMinLedgerSeq();
+            return db.getTransactionsMinLedgerSeq();
         },
         [&db](LedgerIndex min) -> void {
-            db->deleteTransactionsBeforeLedgerSeq(min);
+            db.deleteTransactionsBeforeLedgerSeq(min);
         });
     if (healthWait() == stopping)
         return;
@@ -603,10 +599,10 @@ SHAMapStoreImp::clearPrior(LedgerIndex lastRotated)
         lastRotated,
         "AccountTransactions",
         [&db]() -> std::optional<LedgerIndex> {
-            return db->getAccountTransactionsMinLedgerSeq();
+            return db.getAccountTransactionsMinLedgerSeq();
         },
         [&db](LedgerIndex min) -> void {
-            db->deleteAccountTransactionsBeforeLedgerSeq(min);
+            db.deleteAccountTransactionsBeforeLedgerSeq(min);
         });
     if (healthWait() == stopping)
         return;

src/xrpld/app/misc/SHAMapStoreImp.h

@@ -3,11 +3,11 @@
 
 #include <xrpld/app/ledger/LedgerMaster.h>
 #include <xrpld/app/misc/SHAMapStore.h>
-#include <xrpld/app/rdb/State.h>
-#include <xrpld/core/DatabaseCon.h>
 
 #include <xrpl/nodestore/DatabaseRotating.h>
 #include <xrpl/nodestore/Scheduler.h>
+#include <xrpl/rdb/DatabaseCon.h>
+#include <xrpl/server/State.h>
 
 #include <atomic>
 #include <chrono>

src/xrpld/app/misc/Transaction.h

@@ -9,6 +9,7 @@
 #include <xrpl/protocol/STTx.h>
 #include <xrpl/protocol/TER.h>
 #include <xrpl/protocol/TxMeta.h>
+#include <xrpl/protocol/TxSearched.h>
 
 #include <optional>
 #include <variant>
@@ -36,8 +37,6 @@ enum TransStatus {
     INCOMPLETE = 8   // needs more signatures
 };
 
-enum class TxSearched { all, some, unknown };
-
 // This class is for constructing and examining transactions.
 // Transactions are static so manipulation functions are unnecessary.
 class Transaction : public std::enable_shared_from_this<Transaction>,

src/xrpld/app/misc/ValidatorList.h

@@ -1,7 +1,6 @@
 #ifndef XRPL_APP_MISC_VALIDATORLIST_H_INCLUDED
 #define XRPL_APP_MISC_VALIDATORLIST_H_INCLUDED
 
-#include <xrpld/app/misc/Manifest.h>
 #include <xrpld/core/TimeKeeper.h>
 #include <xrpld/overlay/Message.h>
 
@@ -10,6 +9,7 @@
 #include <xrpl/crypto/csprng.h>
 #include <xrpl/json/json_value.h>
 #include <xrpl/protocol/PublicKey.h>
+#include <xrpl/server/Manifest.h>
 
 #include <boost/thread/shared_mutex.hpp>
 

src/xrpld/app/misc/detail/AccountTxPaging.h

@@ -1,7 +1,7 @@
 #ifndef XRPL_APP_MISC_IMPL_ACCOUNTTXPAGING_H_INCLUDED
 #define XRPL_APP_MISC_IMPL_ACCOUNTTXPAGING_H_INCLUDED
 
-#include <xrpld/app/rdb/RelationalDatabase.h>
+#include <xrpl/rdb/RelationalDatabase.h>
 
 #include <cstdint>
 

src/xrpld/app/misc/detail/AmendmentTable.cpp

@@ -1,12 +1,12 @@
 #include <xrpld/app/main/Application.h>
 #include <xrpld/app/misc/AmendmentTable.h>
-#include <xrpld/app/rdb/Wallet.h>
 #include <xrpld/core/ConfigSections.h>
 
 #include <xrpl/protocol/Feature.h>
 #include <xrpl/protocol/STValidation.h>
 #include <xrpl/protocol/TxFlags.h>
 #include <xrpl/protocol/jss.h>
+#include <xrpl/server/Wallet.h>
 
 #include <boost/algorithm/string.hpp>
 #include <boost/format.hpp>

src/xrpld/app/misc/detail/Manifest.cpp

@@ -1,13 +1,12 @@
-#include <xrpld/app/misc/Manifest.h>
-#include <xrpld/app/rdb/Wallet.h>
-#include <xrpld/core/DatabaseCon.h>
-
 #include <xrpl/basics/Log.h>
 #include <xrpl/basics/StringUtilities.h>
 #include <xrpl/basics/base64.h>
 #include <xrpl/json/json_reader.h>
 #include <xrpl/protocol/PublicKey.h>
 #include <xrpl/protocol/Sign.h>
+#include <xrpl/rdb/DatabaseCon.h>
+#include <xrpl/server/Manifest.h>
+#include <xrpl/server/Wallet.h>
 
 #include <boost/algorithm/string/trim.hpp>
 

src/xrpld/app/misc/detail/Transaction.cpp

@@ -2,13 +2,13 @@
 #include <xrpld/app/main/Application.h>
 #include <xrpld/app/misc/HashRouter.h>
 #include <xrpld/app/misc/Transaction.h>
-#include <xrpld/app/rdb/backend/SQLiteDatabase.h>
 #include <xrpld/app/tx/apply.h>
 #include <xrpld/rpc/CTID.h>
 
 #include <xrpl/basics/safe_cast.h>
 #include <xrpl/protocol/ErrorCodes.h>
 #include <xrpl/protocol/jss.h>
+#include <xrpl/rdb/RelationalDatabase.h>
 
 namespace xrpl {
 
@@ -127,14 +127,9 @@ Transaction::load(
     std::optional<ClosedInterval<uint32_t>> const& range,
     error_code_i& ec)
 {
-    auto const db = dynamic_cast<SQLiteDatabase*>(&app.getRelationalDatabase());
+    auto& db = app.getRelationalDatabase();
 
-    if (!db)
-    {
-        Throw<std::runtime_error>("Failed to get relational database");
-    }
-
-    return db->getTransaction(id, range, ec);
+    return db.getTransaction(id, range, ec);
 }
 
 // options 1 to include the date of the transaction

src/xrpld/app/misc/detail/ValidatorKeys.cpp

@@ -1,10 +1,10 @@
-#include <xrpld/app/misc/Manifest.h>
 #include <xrpld/app/misc/ValidatorKeys.h>
 #include <xrpld/core/Config.h>
 #include <xrpld/core/ConfigSections.h>
 
 #include <xrpl/basics/Log.h>
 #include <xrpl/basics/base64.h>
+#include <xrpl/server/Manifest.h>
 
 namespace xrpl {
 ValidatorKeys::ValidatorKeys(Config const& config, beast::Journal j)

src/xrpld/app/rdb/PeerFinder.h

@@ -2,9 +2,10 @@
 #define XRPL_APP_RDB_PEERFINDER_H_INCLUDED
 
 #include <xrpld/core/Config.h>
-#include <xrpld/core/DatabaseCon.h>
 #include <xrpld/peerfinder/detail/Store.h>
 
+#include <xrpl/rdb/DatabaseCon.h>
+
 namespace xrpl {
 
 /**

src/xrpld/app/rdb/RelationalDatabase.h

@@ -1,234 +0,0 @@
-#ifndef XRPL_APP_RDB_RELATIONALDATABASE_H_INCLUDED
-#define XRPL_APP_RDB_RELATIONALDATABASE_H_INCLUDED
-
-#include <xrpld/app/ledger/Ledger.h>
-#include <xrpld/app/main/Application.h>
-#include <xrpld/app/misc/Transaction.h>
-#include <xrpld/core/Config.h>
-#include <xrpld/core/DatabaseCon.h>
-#include <xrpld/rpc/detail/RPCLedgerHelpers.h>
-
-#include <xrpl/beast/utility/instrumentation.h>
-
-#include <boost/filesystem.hpp>
-#include <boost/variant.hpp>
-
-namespace xrpl {
-
-struct LedgerHashPair
-{
-    uint256 ledgerHash;
-    uint256 parentHash;
-};
-
-struct LedgerRange
-{
-    uint32_t min;
-    uint32_t max;
-};
-
-class RelationalDatabase
-{
-public:
-    struct CountMinMax
-    {
-        std::size_t numberOfRows;
-        LedgerIndex minLedgerSequence;
-        LedgerIndex maxLedgerSequence;
-    };
-
-    struct AccountTxMarker
-    {
-        std::uint32_t ledgerSeq = 0;
-        std::uint32_t txnSeq = 0;
-    };
-
-    struct AccountTxOptions
-    {
-        AccountID const& account;
-        std::uint32_t minLedger;
-        std::uint32_t maxLedger;
-        std::uint32_t offset;
-        std::uint32_t limit;
-        bool bUnlimited;
-    };
-
-    struct AccountTxPageOptions
-    {
-        AccountID const& account;
-        std::uint32_t minLedger;
-        std::uint32_t maxLedger;
-        std::optional<AccountTxMarker> marker;
-        std::uint32_t limit;
-        bool bAdmin;
-    };
-
-    using AccountTx =
-        std::pair<std::shared_ptr<Transaction>, std::shared_ptr<TxMeta>>;
-    using AccountTxs = std::vector<AccountTx>;
-    using txnMetaLedgerType = std::tuple<Blob, Blob, std::uint32_t>;
-    using MetaTxsList = std::vector<txnMetaLedgerType>;
-
-    using LedgerSequence = uint32_t;
-    using LedgerHash = uint256;
-    using LedgerShortcut = RPC::LedgerShortcut;
-    using LedgerSpecifier =
-        std::variant<LedgerRange, LedgerShortcut, LedgerSequence, LedgerHash>;
-
-    struct AccountTxArgs
-    {
-        AccountID account;
-        std::optional<LedgerSpecifier> ledger;
-        bool binary = false;
-        bool forward = false;
-        uint32_t limit = 0;
-        std::optional<AccountTxMarker> marker;
-    };
-
-    struct AccountTxResult
-    {
-        std::variant<AccountTxs, MetaTxsList> transactions;
-        LedgerRange ledgerRange;
-        uint32_t limit;
-        std::optional<AccountTxMarker> marker;
-    };
-
-    /**
-     * @brief init Creates and returns an appropriate RelationalDatabase
-     *        instance based on configuration.
-     * @param app Application object.
-     * @param config Config object.
-     * @param jobQueue JobQueue object.
-     * @return Unique pointer to the interface.
-     */
-    static std::unique_ptr<RelationalDatabase>
-    init(Application& app, Config const& config, JobQueue& jobQueue);
-
-    virtual ~RelationalDatabase() = default;
-
-    /**
-     * @brief getMinLedgerSeq Returns the minimum ledger sequence in the Ledgers
-     *        table.
-     * @return Ledger sequence or no value if no ledgers exist.
-     */
-    virtual std::optional<LedgerIndex>
-    getMinLedgerSeq() = 0;
-
-    /**
-     * @brief getMaxLedgerSeq Returns the maximum ledger sequence in the Ledgers
-     *        table.
-     * @return Ledger sequence or none if no ledgers exist.
-     */
-    virtual std::optional<LedgerIndex>
-    getMaxLedgerSeq() = 0;
-
-    /**
-     * @brief getLedgerInfoByIndex Returns a ledger by its sequence.
-     * @param ledgerSeq Ledger sequence.
-     * @return The ledger if found, otherwise no value.
-     */
-    virtual std::optional<LedgerHeader>
-    getLedgerInfoByIndex(LedgerIndex ledgerSeq) = 0;
-
-    /**
-     * @brief getNewestLedgerInfo Returns the info of the newest saved ledger.
-     * @return Ledger info if found, otherwise no value.
-     */
-    virtual std::optional<LedgerHeader>
-    getNewestLedgerInfo() = 0;
-
-    /**
-     * @brief getLedgerInfoByHash Returns the info of the ledger with given
-     *        hash.
-     * @param ledgerHash Hash of the ledger.
-     * @return Ledger if found, otherwise no value.
-     */
-    virtual std::optional<LedgerHeader>
-    getLedgerInfoByHash(uint256 const& ledgerHash) = 0;
-
-    /**
-     * @brief getHashByIndex Returns the hash of the ledger with the given
-     *        sequence.
-     * @param ledgerIndex Ledger sequence.
-     * @return Hash of the ledger.
-     */
-    virtual uint256
-    getHashByIndex(LedgerIndex ledgerIndex) = 0;
-
-    /**
-     * @brief getHashesByIndex Returns the hashes of the ledger and its parent
-     *        as specified by the ledgerIndex.
-     * @param ledgerIndex Ledger sequence.
-     * @return Struct LedgerHashPair which contains hashes of the ledger and
-     *         its parent.
-     */
-    virtual std::optional<LedgerHashPair>
-    getHashesByIndex(LedgerIndex ledgerIndex) = 0;
-
-    /**
-     * @brief getHashesByIndex Returns hashes of each ledger and its parent for
-     *        all ledgers within the provided range.
-     * @param minSeq Minimum ledger sequence.
-     * @param maxSeq Maximum ledger sequence.
-     * @return Container that maps the sequence number of a found ledger to the
-     *         struct LedgerHashPair which contains the hashes of the ledger and
-     *         its parent.
-     */
-    virtual std::map<LedgerIndex, LedgerHashPair>
-    getHashesByIndex(LedgerIndex minSeq, LedgerIndex maxSeq) = 0;
-
-    /**
-     * @brief getTxHistory Returns the 20 most recent transactions starting from
-     *        the given number.
-     * @param startIndex First number of returned entry.
-     * @return Vector of shared pointers to transactions sorted in
-     *         descending order by ledger sequence.
-     */
-    virtual std::vector<std::shared_ptr<Transaction>>
-    getTxHistory(LedgerIndex startIndex) = 0;
-
-    /**
-     * @brief ledgerDbHasSpace Checks if the ledger database has available
-     *        space.
-     * @param config Config object.
-     * @return True if space is available.
-     */
-    virtual bool
-    ledgerDbHasSpace(Config const& config) = 0;
-
-    /**
-     * @brief transactionDbHasSpace Checks if the transaction database has
-     *        available space.
-     * @param config Config object.
-     * @return True if space is available.
-     */
-    virtual bool
-    transactionDbHasSpace(Config const& config) = 0;
-};
-
-template <class T, class C>
-T
-rangeCheckedCast(C c)
-{
-    if ((c > std::numeric_limits<T>::max()) ||
-        (!std::numeric_limits<T>::is_signed && c < 0) ||
-        (std::numeric_limits<T>::is_signed &&
-         std::numeric_limits<C>::is_signed &&
-         c < std::numeric_limits<T>::lowest()))
-    {
-        // This should never happen
-        // LCOV_EXCL_START
-        UNREACHABLE("xrpl::rangeCheckedCast : domain error");
-        JLOG(debugLog().error())
-            << "rangeCheckedCast domain error:"
-            << " value = " << c << " min = " << std::numeric_limits<T>::lowest()
-            << " max: " << std::numeric_limits<T>::max();
-        // LCOV_EXCL_STOP
-    }
-
-    return static_cast<T>(c);
-}
-
-}  // namespace xrpl
-
-#endif

src/xrpld/app/rdb/backend/SQLiteDatabase.h

@@ -1,11 +1,17 @@
 #ifndef XRPL_APP_RDB_BACKEND_SQLITEDATABASE_H_INCLUDED
 #define XRPL_APP_RDB_BACKEND_SQLITEDATABASE_H_INCLUDED
 
-#include <xrpld/app/rdb/RelationalDatabase.h>
+#include <xrpl/rdb/RelationalDatabase.h>
+
+#include <memory>
 
 namespace xrpl {
 
-class SQLiteDatabase : public RelationalDatabase
+class Config;
+class JobQueue;
+class ServiceRegistry;
+
+class SQLiteDatabase final : public RelationalDatabase
 {
 public:
     /**
@@ -13,32 +19,32 @@ public:
      *        stored in the Transactions table.
      * @return Ledger sequence or no value if no ledgers exist.
      */
-    virtual std::optional<LedgerIndex>
-    getTransactionsMinLedgerSeq() = 0;
+    std::optional<LedgerIndex>
+    getTransactionsMinLedgerSeq() override;
 
     /**
      * @brief getAccountTransactionsMinLedgerSeq Returns the minimum ledger
      *        sequence stored in the AccountTransactions table.
      * @return Ledger sequence or no value if no ledgers exist.
      */
-    virtual std::optional<LedgerIndex>
-    getAccountTransactionsMinLedgerSeq() = 0;
+    std::optional<LedgerIndex>
+    getAccountTransactionsMinLedgerSeq() override;
 
     /**
      * @brief deleteTransactionByLedgerSeq Deletes transactions from the ledger
      *        with the given sequence.
      * @param ledgerSeq Ledger sequence.
      */
-    virtual void
-    deleteTransactionByLedgerSeq(LedgerIndex ledgerSeq) = 0;
+    void
+    deleteTransactionByLedgerSeq(LedgerIndex ledgerSeq) override;
 
     /**
      * @brief deleteBeforeLedgerSeq Deletes all ledgers with a sequence number
      *        less than or equal to the given ledger sequence.
      * @param ledgerSeq Ledger sequence.
      */
-    virtual void
-    deleteBeforeLedgerSeq(LedgerIndex ledgerSeq) = 0;
+    void
+    deleteBeforeLedgerSeq(LedgerIndex ledgerSeq) override;
 
     /**
      * @brief deleteTransactionsBeforeLedgerSeq Deletes all transactions with
@@ -46,8 +52,8 @@ public:
      *        sequence.
      * @param ledgerSeq Ledger sequence.
      */
-    virtual void
-    deleteTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq) = 0;
+    void
+    deleteTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq) override;
 
     /**
      * @brief deleteAccountTransactionsBeforeLedgerSeq Deletes all account
@@ -55,23 +61,23 @@ public:
      *        given ledger sequence.
      * @param ledgerSeq Ledger sequence.
      */
-    virtual void
-    deleteAccountTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq) = 0;
+    void
+    deleteAccountTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq) override;
 
     /**
      * @brief getTransactionCount Returns the number of transactions.
      * @return Number of transactions.
      */
-    virtual std::size_t
-    getTransactionCount() = 0;
+    std::size_t
+    getTransactionCount() override;
 
     /**
      * @brief getAccountTransactionCount Returns the number of account
      *        transactions.
      * @return Number of account transactions.
      */
-    virtual std::size_t
-    getAccountTransactionCount() = 0;
+    std::size_t
+    getAccountTransactionCount() override;
 
     /**
      * @brief getLedgerCountMinMax Returns the minimum ledger sequence,
@@ -79,8 +85,8 @@ public:
      * @return Struct CountMinMax which contains the minimum sequence,
      *         maximum sequence and number of ledgers.
      */
-    virtual struct CountMinMax
-    getLedgerCountMinMax() = 0;
+    RelationalDatabase::CountMinMax
+    getLedgerCountMinMax() override;
 
     /**
      * @brief saveValidatedLedger Saves a ledger into the database.
@@ -88,10 +94,10 @@ public:
      * @param current True if the ledger is current.
      * @return True if saving was successful.
      */
-    virtual bool
+    bool
     saveValidatedLedger(
         std::shared_ptr<Ledger const> const& ledger,
-        bool current) = 0;
+        bool current) override;
 
     /**
      * @brief getLimitedOldestLedgerInfo Returns the info of the oldest ledger
@@ -100,8 +106,8 @@ public:
      * @param ledgerFirstIndex Minimum ledger sequence.
      * @return Ledger info if found, otherwise no value.
      */
-    virtual std::optional<LedgerHeader>
-    getLimitedOldestLedgerInfo(LedgerIndex ledgerFirstIndex) = 0;
+    std::optional<LedgerHeader>
+    getLimitedOldestLedgerInfo(LedgerIndex ledgerFirstIndex) override;
 
     /**
      * @brief getLimitedNewestLedgerInfo Returns the info of the newest ledger
@@ -110,8 +116,8 @@ public:
      * @param ledgerFirstIndex Minimum ledger sequence.
      * @return Ledger info if found, otherwise no value.
      */
-    virtual std::optional<LedgerHeader>
-    getLimitedNewestLedgerInfo(LedgerIndex ledgerFirstIndex) = 0;
+    std::optional<LedgerHeader>
+    getLimitedNewestLedgerInfo(LedgerIndex ledgerFirstIndex) override;
 
     /**
      * @brief getOldestAccountTxs Returns the oldest transactions for the
@@ -124,8 +130,8 @@ public:
      * @return Vector of pairs of found transactions and their metadata
      *         sorted in ascending order by account sequence.
      */
-    virtual AccountTxs
-    getOldestAccountTxs(AccountTxOptions const& options) = 0;
+    AccountTxs
+    getOldestAccountTxs(AccountTxOptions const& options) override;
 
     /**
      * @brief getNewestAccountTxs Returns the newest transactions for the
@@ -138,8 +144,8 @@ public:
      * @return Vector of pairs of found transactions and their metadata
      *         sorted in descending order by account sequence.
      */
-    virtual AccountTxs
-    getNewestAccountTxs(AccountTxOptions const& options) = 0;
+    AccountTxs
+    getNewestAccountTxs(AccountTxOptions const& options) override;
 
     /**
      * @brief getOldestAccountTxsB Returns the oldest transactions in binary
@@ -152,8 +158,8 @@ public:
      * @return Vector of tuples of found transactions, their metadata and
      *         account sequences sorted in ascending order by account sequence.
      */
-    virtual MetaTxsList
-    getOldestAccountTxsB(AccountTxOptions const& options) = 0;
+    MetaTxsList
+    getOldestAccountTxsB(AccountTxOptions const& options) override;
 
     /**
      * @brief getNewestAccountTxsB Returns the newest transactions in binary
@@ -167,8 +173,8 @@ public:
      *         account sequences sorted in descending order by account
      *         sequence.
      */
-    virtual MetaTxsList
-    getNewestAccountTxsB(AccountTxOptions const& options) = 0;
+    MetaTxsList
+    getNewestAccountTxsB(AccountTxOptions const& options) override;
 
     /**
      * @brief oldestAccountTxPage Returns the oldest transactions for the
@@ -182,8 +188,8 @@ public:
      *         sorted in ascending order by account sequence and a marker
      *         for the next search if the search was not finished.
      */
-    virtual std::pair<AccountTxs, std::optional<AccountTxMarker>>
-    oldestAccountTxPage(AccountTxPageOptions const& options) = 0;
+    std::pair<AccountTxs, std::optional<AccountTxMarker>>
+    oldestAccountTxPage(AccountTxPageOptions const& options) override;
 
     /**
      * @brief newestAccountTxPage Returns the newest transactions for the
@@ -197,8 +203,8 @@ public:
      *         sorted in descending order by account sequence and a marker
      *         for the next search if the search was not finished.
      */
-    virtual std::pair<AccountTxs, std::optional<AccountTxMarker>>
-    newestAccountTxPage(AccountTxPageOptions const& options) = 0;
+    std::pair<AccountTxs, std::optional<AccountTxMarker>>
+    newestAccountTxPage(AccountTxPageOptions const& options) override;
 
     /**
      * @brief oldestAccountTxPageB Returns the oldest transactions in binary
@@ -213,8 +219,8 @@ public:
      *         sequence and a marker for the next search if the search was not
      *         finished.
      */
-    virtual std::pair<MetaTxsList, std::optional<AccountTxMarker>>
-    oldestAccountTxPageB(AccountTxPageOptions const& options) = 0;
+    std::pair<MetaTxsList, std::optional<AccountTxMarker>>
+    oldestAccountTxPageB(AccountTxPageOptions const& options) override;
 
     /**
      * @brief newestAccountTxPageB Returns the newest transactions in binary
@@ -229,8 +235,8 @@ public:
      *         sequence and a marker for the next search if the search was not
      *         finished.
      */
-    virtual std::pair<MetaTxsList, std::optional<AccountTxMarker>>
-    newestAccountTxPageB(AccountTxPageOptions const& options) = 0;
+    std::pair<MetaTxsList, std::optional<AccountTxMarker>>
+    newestAccountTxPageB(AccountTxPageOptions const& options) override;
 
     /**
      * @brief getTransaction Returns the transaction with the given hash. If a
@@ -247,48 +253,192 @@ public:
      *         error code is returned via the ec parameter, in other cases the
      *         default error code is not changed.
      */
-    virtual std::variant<AccountTx, TxSearched>
+    std::variant<AccountTx, TxSearched>
     getTransaction(
         uint256 const& id,
-        std::optional<ClosedInterval<uint32_t>> const& range,
-        error_code_i& ec) = 0;
+        std::optional<ClosedInterval<std::uint32_t>> const& range,
+        error_code_i& ec) override;
 
     /**
      * @brief getKBUsedAll Returns the amount of space used by all databases.
      * @return Space in kilobytes.
      */
-    virtual uint32_t
-    getKBUsedAll() = 0;
+    std::uint32_t
+    getKBUsedAll() override;
 
     /**
      * @brief getKBUsedLedger Returns the amount of space space used by the
      *        ledger database.
      * @return Space in kilobytes.
      */
-    virtual uint32_t
-    getKBUsedLedger() = 0;
+    std::uint32_t
+    getKBUsedLedger() override;
 
     /**
      * @brief getKBUsedTransaction Returns the amount of space used by the
      *        transaction database.
      * @return Space in kilobytes.
      */
-    virtual uint32_t
-    getKBUsedTransaction() = 0;
+    std::uint32_t
+    getKBUsedTransaction() override;
 
     /**
      * @brief Closes the ledger database
      */
-    virtual void
-    closeLedgerDB() = 0;
+    void
+    closeLedgerDB() override;
 
     /**
      * @brief Closes the transaction database
      */
-    virtual void
-    closeTransactionDB() = 0;
+    void
+    closeTransactionDB() override;
+
+    std::optional<LedgerHeader>
+    getLedgerInfoByIndex(LedgerIndex ledgerSeq) override;
+
+    std::optional<LedgerHeader>
+    getLedgerInfoByHash(uint256 const& ledgerHash) override;
+
+    uint256
+    getHashByIndex(LedgerIndex ledgerIndex) override;
+
+    std::optional<LedgerHashPair>
+    getHashesByIndex(LedgerIndex ledgerIndex) override;
+
+    std::map<LedgerIndex, LedgerHashPair>
+    getHashesByIndex(LedgerIndex minSeq, LedgerIndex maxSeq) override;
+
+    std::vector<std::shared_ptr<Transaction>>
+    getTxHistory(LedgerIndex startIndex) override;
+
+    std::optional<LedgerHeader>
+    getNewestLedgerInfo() override;
+
+    SQLiteDatabase(
+        ServiceRegistry& registry,
+        Config const& config,
+        JobQueue& jobQueue)
+        : registry_(registry)
+        , useTxTables_(config.useTxTables())
+        , j_(registry.journal("SQLiteDatabase"))
+    {
+        DatabaseCon::Setup const setup = setup_DatabaseCon(config, j_);
+        if (!makeLedgerDBs(
+                config,
+                setup,
+                DatabaseCon::CheckpointerSetup{&jobQueue, &registry_.logs()}))
+        {
+            std::string_view constexpr error =
+                "Failed to create ledger databases";
+
+            JLOG(j_.fatal()) << error;
+            Throw<std::runtime_error>(error.data());
+        }
+    }
+
+    std::optional<LedgerIndex>
+    getMinLedgerSeq() override;
+
+    std::optional<LedgerIndex>
+    getMaxLedgerSeq() override;
+
+    /**
+     * @brief ledgerDbHasSpace Checks if the ledger database has available
+     *        space.
+     * @param config Config object.
+     * @return True if space is available.
+     */
+    bool
+    ledgerDbHasSpace(Config const& config);
+
+    /**
+     * @brief transactionDbHasSpace Checks if the transaction database has
+     *        available space.
+     * @param config Config object.
+     * @return True if space is available.
+     */
+    bool
+    transactionDbHasSpace(Config const& config);
+
+private:
+    ServiceRegistry& registry_;
+    bool const useTxTables_;
+    beast::Journal j_;
+    std::unique_ptr<DatabaseCon> ledgerDb_, txdb_;
+
+    /**
+     * @brief makeLedgerDBs Opens ledger and transaction databases for the node
+     *        store, and stores their descriptors in private member variables.
+     * @param config Config object.
+     * @param setup Path to the databases and other opening parameters.
+     * @param checkpointerSetup Checkpointer parameters.
+     * @return True if node databases opened successfully.
+     */
+    bool
+    makeLedgerDBs(
+        Config const& config,
+        DatabaseCon::Setup const& setup,
+        DatabaseCon::CheckpointerSetup const& checkpointerSetup);
+
+    /**
+     * @brief existsLedger Checks if the node store ledger database exists.
+     * @return True if the node store ledger database exists.
+     */
+    bool
+    existsLedger()
+    {
+        return static_cast<bool>(ledgerDb_);
+    }
+
+    /**
+     * @brief existsTransaction Checks if the node store transaction database
+     *        exists.
+     * @return True if the node store transaction database exists.
+     */
+    bool
+    existsTransaction()
+    {
+        return static_cast<bool>(txdb_);
+    }
+
+    /**
+     * @brief checkoutTransaction Checks out and returns node store ledger
+     *        database.
+     * @return Session to the node store ledger database.
+     */
+    auto
+    checkoutLedger()
+    {
+        return ledgerDb_->checkoutDb();
+    }
+
+    /**
+     * @brief checkoutTransaction Checks out and returns the node store
+     *        transaction database.
+     * @return Session to the node store transaction database.
+     */
+    auto
+    checkoutTransaction()
+    {
+        return txdb_->checkoutDb();
+    }
 };
 
+/**
+ * @brief setup_RelationalDatabase Creates and returns a SQLiteDatabase
+ *        instance based on configuration.
+ * @param registry The service registry.
+ * @param config Config object.
+ * @param jobQueue JobQueue object.
+ * @return Unique pointer to the SQLiteDatabase implementation.
+ */
+std::unique_ptr<SQLiteDatabase>
+setup_RelationalDatabase(
+    ServiceRegistry& registry,
+    Config const& config,
+    JobQueue& jobQueue);
+
 }  // namespace xrpl
 
 #endif

src/xrpld/app/rdb/backend/detail/Node.cpp

@@ -3,14 +3,14 @@
 #include <xrpld/app/ledger/LedgerToJson.h>
 #include <xrpld/app/ledger/PendingSaves.h>
 #include <xrpld/app/ledger/TransactionMaster.h>
-#include <xrpld/app/rdb/RelationalDatabase.h>
 #include <xrpld/app/rdb/backend/detail/Node.h>
-#include <xrpld/core/DatabaseCon.h>
-#include <xrpld/core/SociDB.h>
 
 #include <xrpl/basics/BasicConfig.h>
 #include <xrpl/basics/StringUtilities.h>
 #include <xrpl/json/to_string.h>
+#include <xrpl/rdb/DatabaseCon.h>
+#include <xrpl/rdb/RelationalDatabase.h>
+#include <xrpl/rdb/SociDB.h>
 
 #include <boost/range/adaptor/transformed.hpp>
 
@@ -70,9 +70,9 @@ makeLedgerDBs(
             boost::format("PRAGMA cache_size=-%d;") %
             kilobytes(config.getValueFor(SizedItem::txnDBCache)));
 
-        if (!setup.standAlone || setup.startUp == Config::LOAD ||
-            setup.startUp == Config::LOAD_FILE ||
-            setup.startUp == Config::REPLAY)
+        if (!setup.standAlone || setup.startUp == StartUpType::LOAD ||
+            setup.startUp == StartUpType::LOAD_FILE ||
+            setup.startUp == StartUpType::REPLAY)
         {
             // Check if AccountTransactions has primary key
             std::string cid, name, type;

src/xrpld/app/rdb/backend/detail/Node.h

@@ -2,9 +2,10 @@
 #define XRPL_APP_RDB_BACKEND_DETAIL_NODE_H_INCLUDED
 
 #include <xrpld/app/ledger/Ledger.h>
-#include <xrpld/app/rdb/RelationalDatabase.h>
 #include <xrpld/core/Config.h>
 
+#include <xrpl/rdb/RelationalDatabase.h>
+
 namespace xrpl {
 namespace detail {
 

src/xrpld/app/rdb/backend/detail/SQLiteDatabase.cpp

@@ -3,220 +3,15 @@
 #include <xrpld/app/misc/detail/AccountTxPaging.h>
 #include <xrpld/app/rdb/backend/SQLiteDatabase.h>
 #include <xrpld/app/rdb/backend/detail/Node.h>
-#include <xrpld/core/DatabaseCon.h>
-#include <xrpld/core/SociDB.h>
 
 #include <xrpl/basics/StringUtilities.h>
+#include <xrpl/rdb/DatabaseCon.h>
+#include <xrpl/rdb/SociDB.h>
 
 namespace xrpl {
 
-class SQLiteDatabaseImp final : public SQLiteDatabase
-{
-public:
-    SQLiteDatabaseImp(
-        Application& app,
-        Config const& config,
-        JobQueue& jobQueue)
-        : app_(app)
-        , useTxTables_(config.useTxTables())
-        , j_(app_.journal("SQLiteDatabaseImp"))
-    {
-        DatabaseCon::Setup const setup = setup_DatabaseCon(config, j_);
-        if (!makeLedgerDBs(
-                config,
-                setup,
-                DatabaseCon::CheckpointerSetup{&jobQueue, &app_.logs()}))
-        {
-            std::string_view constexpr error =
-                "Failed to create ledger databases";
-
-            JLOG(j_.fatal()) << error;
-            Throw<std::runtime_error>(error.data());
-        }
-    }
-
-    std::optional<LedgerIndex>
-    getMinLedgerSeq() override;
-
-    std::optional<LedgerIndex>
-    getTransactionsMinLedgerSeq() override;
-
-    std::optional<LedgerIndex>
-    getAccountTransactionsMinLedgerSeq() override;
-
-    std::optional<LedgerIndex>
-    getMaxLedgerSeq() override;
-
-    void
-    deleteTransactionByLedgerSeq(LedgerIndex ledgerSeq) override;
-
-    void
-    deleteBeforeLedgerSeq(LedgerIndex ledgerSeq) override;
-
-    void
-    deleteTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq) override;
-
-    void
-    deleteAccountTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq) override;
-
-    std::size_t
-    getTransactionCount() override;
-
-    std::size_t
-    getAccountTransactionCount() override;
-
-    RelationalDatabase::CountMinMax
-    getLedgerCountMinMax() override;
-
-    bool
-    saveValidatedLedger(
-        std::shared_ptr<Ledger const> const& ledger,
-        bool current) override;
-
-    std::optional<LedgerHeader>
-    getLedgerInfoByIndex(LedgerIndex ledgerSeq) override;
-
-    std::optional<LedgerHeader>
-    getNewestLedgerInfo() override;
-
-    std::optional<LedgerHeader>
-    getLimitedOldestLedgerInfo(LedgerIndex ledgerFirstIndex) override;
-
-    std::optional<LedgerHeader>
-    getLimitedNewestLedgerInfo(LedgerIndex ledgerFirstIndex) override;
-
-    std::optional<LedgerHeader>
-    getLedgerInfoByHash(uint256 const& ledgerHash) override;
-
-    uint256
-    getHashByIndex(LedgerIndex ledgerIndex) override;
-
-    std::optional<LedgerHashPair>
-    getHashesByIndex(LedgerIndex ledgerIndex) override;
-
-    std::map<LedgerIndex, LedgerHashPair>
-    getHashesByIndex(LedgerIndex minSeq, LedgerIndex maxSeq) override;
-
-    std::vector<std::shared_ptr<Transaction>>
-    getTxHistory(LedgerIndex startIndex) override;
-
-    AccountTxs
-    getOldestAccountTxs(AccountTxOptions const& options) override;
-
-    AccountTxs
-    getNewestAccountTxs(AccountTxOptions const& options) override;
-
-    MetaTxsList
-    getOldestAccountTxsB(AccountTxOptions const& options) override;
-
-    MetaTxsList
-    getNewestAccountTxsB(AccountTxOptions const& options) override;
-
-    std::pair<AccountTxs, std::optional<AccountTxMarker>>
-    oldestAccountTxPage(AccountTxPageOptions const& options) override;
-
-    std::pair<AccountTxs, std::optional<AccountTxMarker>>
-    newestAccountTxPage(AccountTxPageOptions const& options) override;
-
-    std::pair<MetaTxsList, std::optional<AccountTxMarker>>
-    oldestAccountTxPageB(AccountTxPageOptions const& options) override;
-
-    std::pair<MetaTxsList, std::optional<AccountTxMarker>>
-    newestAccountTxPageB(AccountTxPageOptions const& options) override;
-
-    std::variant<AccountTx, TxSearched>
-    getTransaction(
-        uint256 const& id,
-        std::optional<ClosedInterval<std::uint32_t>> const& range,
-        error_code_i& ec) override;
-
-    bool
-    ledgerDbHasSpace(Config const& config) override;
-
-    bool
-    transactionDbHasSpace(Config const& config) override;
-
-    std::uint32_t
-    getKBUsedAll() override;
-
-    std::uint32_t
-    getKBUsedLedger() override;
-
-    std::uint32_t
-    getKBUsedTransaction() override;
-
-    void
-    closeLedgerDB() override;
-
-    void
-    closeTransactionDB() override;
-
-private:
-    Application& app_;
-    bool const useTxTables_;
-    beast::Journal j_;
-    std::unique_ptr<DatabaseCon> ledgerDb_, txdb_;
-
-    /**
-     * @brief makeLedgerDBs Opens ledger and transaction databases for the node
-     *        store, and stores their descriptors in private member variables.
-     * @param config Config object.
-     * @param setup Path to the databases and other opening parameters.
-     * @param checkpointerSetup Checkpointer parameters.
-     * @return True if node databases opened successfully.
-     */
-    bool
-    makeLedgerDBs(
-        Config const& config,
-        DatabaseCon::Setup const& setup,
-        DatabaseCon::CheckpointerSetup const& checkpointerSetup);
-
-    /**
-     * @brief existsLedger Checks if the node store ledger database exists.
-     * @return True if the node store ledger database exists.
-     */
-    bool
-    existsLedger()
-    {
-        return static_cast<bool>(ledgerDb_);
-    }
-
-    /**
-     * @brief existsTransaction Checks if the node store transaction database
-     *        exists.
-     * @return True if the node store transaction database exists.
-     */
-    bool
-    existsTransaction()
-    {
-        return static_cast<bool>(txdb_);
-    }
-
-    /**
-     * @brief checkoutTransaction Checks out and returns node store ledger
-     *        database.
-     * @return Session to the node store ledger database.
-     */
-    auto
-    checkoutLedger()
-    {
-        return ledgerDb_->checkoutDb();
-    }
-
-    /**
-     * @brief checkoutTransaction Checks out and returns the node store
-     *        transaction database.
-     * @return Session to the node store transaction database.
-     */
-    auto
-    checkoutTransaction()
-    {
-        return txdb_->checkoutDb();
-    }
-};
-
 bool
-SQLiteDatabaseImp::makeLedgerDBs(
+SQLiteDatabase::makeLedgerDBs(
     Config const& config,
     DatabaseCon::Setup const& setup,
     DatabaseCon::CheckpointerSetup const& checkpointerSetup)
@@ -229,7 +24,7 @@ SQLiteDatabaseImp::makeLedgerDBs(
 }
 
 std::optional<LedgerIndex>
-SQLiteDatabaseImp::getMinLedgerSeq()
+SQLiteDatabase::getMinLedgerSeq()
 {
     /* if databases exists, use it */
     if (existsLedger())
@@ -243,7 +38,7 @@ SQLiteDatabaseImp::getMinLedgerSeq()
 }
 
 std::optional<LedgerIndex>
-SQLiteDatabaseImp::getTransactionsMinLedgerSeq()
+SQLiteDatabase::getTransactionsMinLedgerSeq()
 {
     if (!useTxTables_)
         return {};
@@ -258,7 +53,7 @@ SQLiteDatabaseImp::getTransactionsMinLedgerSeq()
 }
 
 std::optional<LedgerIndex>
-SQLiteDatabaseImp::getAccountTransactionsMinLedgerSeq()
+SQLiteDatabase::getAccountTransactionsMinLedgerSeq()
 {
     if (!useTxTables_)
         return {};
@@ -274,7 +69,7 @@ SQLiteDatabaseImp::getAccountTransactionsMinLedgerSeq()
 }
 
 std::optional<LedgerIndex>
-SQLiteDatabaseImp::getMaxLedgerSeq()
+SQLiteDatabase::getMaxLedgerSeq()
 {
     if (existsLedger())
     {
@@ -286,7 +81,7 @@ SQLiteDatabaseImp::getMaxLedgerSeq()
 }
 
 void
-SQLiteDatabaseImp::deleteTransactionByLedgerSeq(LedgerIndex ledgerSeq)
+SQLiteDatabase::deleteTransactionByLedgerSeq(LedgerIndex ledgerSeq)
 {
     if (!useTxTables_)
         return;
@@ -301,7 +96,7 @@ SQLiteDatabaseImp::deleteTransactionByLedgerSeq(LedgerIndex ledgerSeq)
 }
 
 void
-SQLiteDatabaseImp::deleteBeforeLedgerSeq(LedgerIndex ledgerSeq)
+SQLiteDatabase::deleteBeforeLedgerSeq(LedgerIndex ledgerSeq)
 {
     if (existsLedger())
     {
@@ -313,7 +108,7 @@ SQLiteDatabaseImp::deleteBeforeLedgerSeq(LedgerIndex ledgerSeq)
 }
 
 void
-SQLiteDatabaseImp::deleteTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq)
+SQLiteDatabase::deleteTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq)
 {
     if (!useTxTables_)
         return;
@@ -328,8 +123,7 @@ SQLiteDatabaseImp::deleteTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq)
 }
 
 void
-SQLiteDatabaseImp::deleteAccountTransactionsBeforeLedgerSeq(
-    LedgerIndex ledgerSeq)
+SQLiteDatabase::deleteAccountTransactionsBeforeLedgerSeq(LedgerIndex ledgerSeq)
 {
     if (!useTxTables_)
         return;
@@ -344,7 +138,7 @@ SQLiteDatabaseImp::deleteAccountTransactionsBeforeLedgerSeq(
 }
 
 std::size_t
-SQLiteDatabaseImp::getTransactionCount()
+SQLiteDatabase::getTransactionCount()
 {
     if (!useTxTables_)
         return 0;
@@ -359,7 +153,7 @@ SQLiteDatabaseImp::getTransactionCount()
 }
 
 std::size_t
-SQLiteDatabaseImp::getAccountTransactionCount()
+SQLiteDatabase::getAccountTransactionCount()
 {
     if (!useTxTables_)
         return 0;
@@ -374,7 +168,7 @@ SQLiteDatabaseImp::getAccountTransactionCount()
 }
 
 RelationalDatabase::CountMinMax
-SQLiteDatabaseImp::getLedgerCountMinMax()
+SQLiteDatabase::getLedgerCountMinMax()
 {
     if (existsLedger())
     {
@@ -386,14 +180,14 @@ SQLiteDatabaseImp::getLedgerCountMinMax()
 }
 
 bool
-SQLiteDatabaseImp::saveValidatedLedger(
+SQLiteDatabase::saveValidatedLedger(
     std::shared_ptr<Ledger const> const& ledger,
     bool current)
 {
     if (existsLedger())
     {
         if (!detail::saveValidatedLedger(
-                *ledgerDb_, txdb_, app_, ledger, current))
+                *ledgerDb_, txdb_, registry_.app(), ledger, current))
             return false;
     }
 
@@ -401,7 +195,7 @@ SQLiteDatabaseImp::saveValidatedLedger(
 }
 
 std::optional<LedgerHeader>
-SQLiteDatabaseImp::getLedgerInfoByIndex(LedgerIndex ledgerSeq)
+SQLiteDatabase::getLedgerInfoByIndex(LedgerIndex ledgerSeq)
 {
     if (existsLedger())
     {
@@ -416,7 +210,7 @@ SQLiteDatabaseImp::getLedgerInfoByIndex(LedgerIndex ledgerSeq)
 }
 
 std::optional<LedgerHeader>
-SQLiteDatabaseImp::getNewestLedgerInfo()
+SQLiteDatabase::getNewestLedgerInfo()
 {
     if (existsLedger())
     {
@@ -431,7 +225,7 @@ SQLiteDatabaseImp::getNewestLedgerInfo()
 }
 
 std::optional<LedgerHeader>
-SQLiteDatabaseImp::getLimitedOldestLedgerInfo(LedgerIndex ledgerFirstIndex)
+SQLiteDatabase::getLimitedOldestLedgerInfo(LedgerIndex ledgerFirstIndex)
 {
     if (existsLedger())
     {
@@ -447,7 +241,7 @@ SQLiteDatabaseImp::getLimitedOldestLedgerInfo(LedgerIndex ledgerFirstIndex)
 }
 
 std::optional<LedgerHeader>
-SQLiteDatabaseImp::getLimitedNewestLedgerInfo(LedgerIndex ledgerFirstIndex)
+SQLiteDatabase::getLimitedNewestLedgerInfo(LedgerIndex ledgerFirstIndex)
 {
     if (existsLedger())
     {
@@ -463,7 +257,7 @@ SQLiteDatabaseImp::getLimitedNewestLedgerInfo(LedgerIndex ledgerFirstIndex)
 }
 
 std::optional<LedgerHeader>
-SQLiteDatabaseImp::getLedgerInfoByHash(uint256 const& ledgerHash)
+SQLiteDatabase::getLedgerInfoByHash(uint256 const& ledgerHash)
 {
     if (existsLedger())
     {
@@ -478,7 +272,7 @@ SQLiteDatabaseImp::getLedgerInfoByHash(uint256 const& ledgerHash)
 }
 
 uint256
-SQLiteDatabaseImp::getHashByIndex(LedgerIndex ledgerIndex)
+SQLiteDatabase::getHashByIndex(LedgerIndex ledgerIndex)
 {
     if (existsLedger())
     {
@@ -493,7 +287,7 @@ SQLiteDatabaseImp::getHashByIndex(LedgerIndex ledgerIndex)
 }
 
 std::optional<LedgerHashPair>
-SQLiteDatabaseImp::getHashesByIndex(LedgerIndex ledgerIndex)
+SQLiteDatabase::getHashesByIndex(LedgerIndex ledgerIndex)
 {
     if (existsLedger())
     {
@@ -508,7 +302,7 @@ SQLiteDatabaseImp::getHashesByIndex(LedgerIndex ledgerIndex)
 }
 
 std::map<LedgerIndex, LedgerHashPair>
-SQLiteDatabaseImp::getHashesByIndex(LedgerIndex minSeq, LedgerIndex maxSeq)
+SQLiteDatabase::getHashesByIndex(LedgerIndex minSeq, LedgerIndex maxSeq)
 {
     if (existsLedger())
     {
@@ -523,7 +317,7 @@ SQLiteDatabaseImp::getHashesByIndex(LedgerIndex minSeq, LedgerIndex maxSeq)
 }
 
 std::vector<std::shared_ptr<Transaction>>
-SQLiteDatabaseImp::getTxHistory(LedgerIndex startIndex)
+SQLiteDatabase::getTxHistory(LedgerIndex startIndex)
 {
     if (!useTxTables_)
         return {};
@@ -531,7 +325,8 @@ SQLiteDatabaseImp::getTxHistory(LedgerIndex startIndex)
     if (existsTransaction())
     {
         auto db = checkoutTransaction();
-        auto const res = detail::getTxHistory(*db, app_, startIndex, 20).first;
+        auto const res =
+            detail::getTxHistory(*db, registry_.app(), startIndex, 20).first;
 
         if (!res.empty())
             return res;
@@ -541,17 +336,18 @@ SQLiteDatabaseImp::getTxHistory(LedgerIndex startIndex)
 }
 
 RelationalDatabase::AccountTxs
-SQLiteDatabaseImp::getOldestAccountTxs(AccountTxOptions const& options)
+SQLiteDatabase::getOldestAccountTxs(AccountTxOptions const& options)
 {
     if (!useTxTables_)
         return {};
 
-    LedgerMaster& ledgerMaster = app_.getLedgerMaster();
+    LedgerMaster& ledgerMaster = registry_.getLedgerMaster();
 
     if (existsTransaction())
     {
         auto db = checkoutTransaction();
-        return detail::getOldestAccountTxs(*db, app_, ledgerMaster, options, j_)
+        return detail::getOldestAccountTxs(
+                   *db, registry_.app(), ledgerMaster, options, j_)
             .first;
     }
 
@@ -559,17 +355,18 @@ SQLiteDatabaseImp::getOldestAccountTxs(AccountTxOptions const& options)
 }
 
 RelationalDatabase::AccountTxs
-SQLiteDatabaseImp::getNewestAccountTxs(AccountTxOptions const& options)
+SQLiteDatabase::getNewestAccountTxs(AccountTxOptions const& options)
 {
     if (!useTxTables_)
         return {};
 
-    LedgerMaster& ledgerMaster = app_.getLedgerMaster();
+    LedgerMaster& ledgerMaster = registry_.getLedgerMaster();
 
     if (existsTransaction())
     {
         auto db = checkoutTransaction();
-        return detail::getNewestAccountTxs(*db, app_, ledgerMaster, options, j_)
+        return detail::getNewestAccountTxs(
+                   *db, registry_.app(), ledgerMaster, options, j_)
             .first;
     }
 
@@ -577,7 +374,7 @@ SQLiteDatabaseImp::getNewestAccountTxs(AccountTxOptions const& options)
 }
 
 RelationalDatabase::MetaTxsList
-SQLiteDatabaseImp::getOldestAccountTxsB(AccountTxOptions const& options)
+SQLiteDatabase::getOldestAccountTxsB(AccountTxOptions const& options)
 {
     if (!useTxTables_)
         return {};
@@ -585,14 +382,15 @@ SQLiteDatabaseImp::getOldestAccountTxsB(AccountTxOptions const& options)
     if (existsTransaction())
     {
         auto db = checkoutTransaction();
-        return detail::getOldestAccountTxsB(*db, app_, options, j_).first;
+        return detail::getOldestAccountTxsB(*db, registry_.app(), options, j_)
+            .first;
     }
 
     return {};
 }
 
 RelationalDatabase::MetaTxsList
-SQLiteDatabaseImp::getNewestAccountTxsB(AccountTxOptions const& options)
+SQLiteDatabase::getNewestAccountTxsB(AccountTxOptions const& options)
 {
     if (!useTxTables_)
         return {};
@@ -600,7 +398,8 @@ SQLiteDatabaseImp::getNewestAccountTxsB(AccountTxOptions const& options)
     if (existsTransaction())
     {
         auto db = checkoutTransaction();
-        return detail::getNewestAccountTxsB(*db, app_, options, j_).first;
+        return detail::getNewestAccountTxsB(*db, registry_.app(), options, j_)
+            .first;
     }
 
     return {};
@@ -609,17 +408,16 @@ SQLiteDatabaseImp::getNewestAccountTxsB(AccountTxOptions const& options)
 std::pair<
     RelationalDatabase::AccountTxs,
     std::optional<RelationalDatabase::AccountTxMarker>>
-SQLiteDatabaseImp::oldestAccountTxPage(AccountTxPageOptions const& options)
+SQLiteDatabase::oldestAccountTxPage(AccountTxPageOptions const& options)
 {
     if (!useTxTables_)
         return {};
 
     static std::uint32_t const page_length(200);
-    auto onUnsavedLedger =
-        std::bind(saveLedgerAsync, std::ref(app_), std::placeholders::_1);
+    auto onUnsavedLedger = std::bind(
+        saveLedgerAsync, std::ref(registry_.app()), std::placeholders::_1);
     AccountTxs ret;
-    Application& app = app_;
-    auto onTransaction = [&ret, &app](
+    auto onTransaction = [&ret, &app = registry_.app()](
                              std::uint32_t ledger_index,
                              std::string const& status,
                              Blob&& rawTxn,
@@ -643,17 +441,16 @@ SQLiteDatabaseImp::oldestAccountTxPage(AccountTxPageOptions const& options)
 std::pair<
     RelationalDatabase::AccountTxs,
     std::optional<RelationalDatabase::AccountTxMarker>>
-SQLiteDatabaseImp::newestAccountTxPage(AccountTxPageOptions const& options)
+SQLiteDatabase::newestAccountTxPage(AccountTxPageOptions const& options)
 {
     if (!useTxTables_)
         return {};
 
     static std::uint32_t const page_length(200);
-    auto onUnsavedLedger =
-        std::bind(saveLedgerAsync, std::ref(app_), std::placeholders::_1);
+    auto onUnsavedLedger = std::bind(
+        saveLedgerAsync, std::ref(registry_.app()), std::placeholders::_1);
     AccountTxs ret;
-    Application& app = app_;
-    auto onTransaction = [&ret, &app](
+    auto onTransaction = [&ret, &app = registry_.app()](
                              std::uint32_t ledger_index,
                              std::string const& status,
                              Blob&& rawTxn,
@@ -677,14 +474,14 @@ SQLiteDatabaseImp::newestAccountTxPage(AccountTxPageOptions const& options)
 std::pair<
     RelationalDatabase::MetaTxsList,
     std::optional<RelationalDatabase::AccountTxMarker>>
-SQLiteDatabaseImp::oldestAccountTxPageB(AccountTxPageOptions const& options)
+SQLiteDatabase::oldestAccountTxPageB(AccountTxPageOptions const& options)
 {
     if (!useTxTables_)
         return {};
 
     static std::uint32_t const page_length(500);
-    auto onUnsavedLedger =
-        std::bind(saveLedgerAsync, std::ref(app_), std::placeholders::_1);
+    auto onUnsavedLedger = std::bind(
+        saveLedgerAsync, std::ref(registry_.app()), std::placeholders::_1);
     MetaTxsList ret;
     auto onTransaction = [&ret](
                              std::uint32_t ledgerIndex,
@@ -710,14 +507,14 @@ SQLiteDatabaseImp::oldestAccountTxPageB(AccountTxPageOptions const& options)
 std::pair<
     RelationalDatabase::MetaTxsList,
     std::optional<RelationalDatabase::AccountTxMarker>>
-SQLiteDatabaseImp::newestAccountTxPageB(AccountTxPageOptions const& options)
+SQLiteDatabase::newestAccountTxPageB(AccountTxPageOptions const& options)
 {
     if (!useTxTables_)
         return {};
 
     static std::uint32_t const page_length(500);
-    auto onUnsavedLedger =
-        std::bind(saveLedgerAsync, std::ref(app_), std::placeholders::_1);
+    auto onUnsavedLedger = std::bind(
+        saveLedgerAsync, std::ref(registry_.app()), std::placeholders::_1);
     MetaTxsList ret;
     auto onTransaction = [&ret](
                              std::uint32_t ledgerIndex,
@@ -741,7 +538,7 @@ SQLiteDatabaseImp::newestAccountTxPageB(AccountTxPageOptions const& options)
 }
 
 std::variant<RelationalDatabase::AccountTx, TxSearched>
-SQLiteDatabaseImp::getTransaction(
+SQLiteDatabase::getTransaction(
     uint256 const& id,
     std::optional<ClosedInterval<std::uint32_t>> const& range,
     error_code_i& ec)
@@ -752,14 +549,14 @@ SQLiteDatabaseImp::getTransaction(
     if (existsTransaction())
     {
         auto db = checkoutTransaction();
-        return detail::getTransaction(*db, app_, id, range, ec);
+        return detail::getTransaction(*db, registry_.app(), id, range, ec);
     }
 
     return TxSearched::unknown;
 }
 
 bool
-SQLiteDatabaseImp::ledgerDbHasSpace(Config const& config)
+SQLiteDatabase::ledgerDbHasSpace(Config const& config)
 {
     if (existsLedger())
     {
@@ -771,7 +568,7 @@ SQLiteDatabaseImp::ledgerDbHasSpace(Config const& config)
 }
 
 bool
-SQLiteDatabaseImp::transactionDbHasSpace(Config const& config)
+SQLiteDatabase::transactionDbHasSpace(Config const& config)
 {
     if (!useTxTables_)
         return true;
@@ -786,7 +583,7 @@ SQLiteDatabaseImp::transactionDbHasSpace(Config const& config)
 }
 
 std::uint32_t
-SQLiteDatabaseImp::getKBUsedAll()
+SQLiteDatabase::getKBUsedAll()
 {
     if (existsLedger())
     {
@@ -797,7 +594,7 @@ SQLiteDatabaseImp::getKBUsedAll()
 }
 
 std::uint32_t
-SQLiteDatabaseImp::getKBUsedLedger()
+SQLiteDatabase::getKBUsedLedger()
 {
     if (existsLedger())
     {
@@ -808,7 +605,7 @@ SQLiteDatabaseImp::getKBUsedLedger()
 }
 
 std::uint32_t
-SQLiteDatabaseImp::getKBUsedTransaction()
+SQLiteDatabase::getKBUsedTransaction()
 {
     if (!useTxTables_)
         return 0;
@@ -822,21 +619,24 @@ SQLiteDatabaseImp::getKBUsedTransaction()
 }
 
 void
-SQLiteDatabaseImp::closeLedgerDB()
+SQLiteDatabase::closeLedgerDB()
 {
     ledgerDb_.reset();
 }
 
 void
-SQLiteDatabaseImp::closeTransactionDB()
+SQLiteDatabase::closeTransactionDB()
 {
     txdb_.reset();
 }
 
-std::unique_ptr<RelationalDatabase>
-getSQLiteDatabase(Application& app, Config const& config, JobQueue& jobQueue)
+std::unique_ptr<SQLiteDatabase>
+setup_RelationalDatabase(
+    ServiceRegistry& registry,
+    Config const& config,
+    JobQueue& jobQueue)
 {
-    return std::make_unique<SQLiteDatabaseImp>(app, config, jobQueue);
+    return std::make_unique<SQLiteDatabase>(registry, config, jobQueue);
 }
 
 }  // namespace xrpl

src/xrpld/app/rdb/detail/RelationalDatabase.cpp

@@ -1,45 +0,0 @@
-#include <xrpld/app/main/Application.h>
-#include <xrpld/app/rdb/RelationalDatabase.h>
-#include <xrpld/core/ConfigSections.h>
-
-namespace xrpl {
-
-extern std::unique_ptr<RelationalDatabase>
-getSQLiteDatabase(Application& app, Config const& config, JobQueue& jobQueue);
-
-std::unique_ptr<RelationalDatabase>
-RelationalDatabase::init(
-    Application& app,
-    Config const& config,
-    JobQueue& jobQueue)
-{
-    bool use_sqlite = false;
-
-    Section const& rdb_section{config.section(SECTION_RELATIONAL_DB)};
-    if (!rdb_section.empty())
-    {
-        if (boost::iequals(get(rdb_section, "backend"), "sqlite"))
-        {
-            use_sqlite = true;
-        }
-        else
-        {
-            Throw<std::runtime_error>(
-                "Invalid rdb_section backend value: " +
-                get(rdb_section, "backend"));
-        }
-    }
-    else
-    {
-        use_sqlite = true;
-    }
-
-    if (use_sqlite)
-    {
-        return getSQLiteDatabase(app, config, jobQueue);
-    }
-
-    return std::unique_ptr<RelationalDatabase>();
-}
-
-}  // namespace xrpl

src/xrpld/core/Config.h

@@ -5,7 +5,9 @@
 #include <xrpl/basics/base_uint.h>
 #include <xrpl/beast/net/IPEndpoint.h>
 #include <xrpl/beast/utility/Journal.h>
+#include <xrpl/core/StartUpType.h>
 #include <xrpl/protocol/SystemParameters.h>  // VFALCO Breaks levelization
+#include <xrpl/rdb/DatabaseCon.h>
 
 #include <boost/filesystem.hpp>  // VFALCO FIX: This include should not be here
 
@@ -125,8 +127,7 @@ public:
     // Entries from [ips_fixed] config stanza
     std::vector<std::string> IPS_FIXED;
 
-    enum StartUpType { FRESH, NORMAL, LOAD, LOAD_FILE, REPLAY, NETWORK };
-    StartUpType START_UP = NORMAL;
+    StartUpType START_UP = StartUpType::NORMAL;
 
     bool START_VALID = false;
 
@@ -363,6 +364,11 @@ public:
 FeeSetup
 setup_FeeVote(Section const& section);
 
+DatabaseCon::Setup
+setup_DatabaseCon(
+    Config const& c,
+    std::optional<beast::Journal> j = std::nullopt);
+
 }  // namespace xrpl
 
 #endif

src/xrpld/core/ServiceRegistryImpl.h

@@ -0,0 +1,174 @@
+#ifndef XRPLD_CORE_SERVICEREGISTRYIMPL_H_INCLUDED
+#define XRPLD_CORE_SERVICEREGISTRYIMPL_H_INCLUDED
+
+#include <xrpl/core/ServiceRegistry.h>
+
+namespace xrpl {
+
+// Forward declaration
+class Application;
+
+/** Implementation of ServiceRegistry that delegates to Application.
+
+    This class provides a ServiceRegistry interface that wraps an Application
+    reference. It allows components to depend on ServiceRegistry instead of
+    Application, enabling gradual migration and better separation of concerns.
+
+    Usage:
+        Application& app = ...;
+        ServiceRegistry& registry = app.getServiceRegistry();
+        // or
+        ServiceRegistryImpl registry(app);
+*/
+class ServiceRegistryImpl : public ServiceRegistry
+{
+public:
+    explicit ServiceRegistryImpl(Application& app);
+
+    ~ServiceRegistryImpl() override = default;
+
+    // Core infrastructure services
+    CollectorManager&
+    getCollectorManager() override;
+
+    Family&
+    getNodeFamily() override;
+
+    TimeKeeper&
+    timeKeeper() override;
+
+    JobQueue&
+    getJobQueue() override;
+
+    NodeCache&
+    getTempNodeCache() override;
+
+    CachedSLEs&
+    cachedSLEs() override;
+
+    // Protocol and validation services
+    AmendmentTable&
+    getAmendmentTable() override;
+
+    HashRouter&
+    getHashRouter() override;
+
+    LoadFeeTrack&
+    getFeeTrack() override;
+
+    LoadManager&
+    getLoadManager() override;
+
+    RCLValidations&
+    getValidations() override;
+
+    ValidatorList&
+    validators() override;
+
+    ValidatorSite&
+    validatorSites() override;
+
+    ManifestCache&
+    validatorManifests() override;
+
+    ManifestCache&
+    publisherManifests() override;
+
+    // Network services
+    Overlay&
+    overlay() override;
+
+    Cluster&
+    cluster() override;
+
+    PeerReservationTable&
+    peerReservations() override;
+
+    Resource::Manager&
+    getResourceManager() override;
+
+    // Storage services
+    NodeStore::Database&
+    getNodeStore() override;
+
+    SHAMapStore&
+    getSHAMapStore() override;
+
+    RelationalDatabase&
+    getRelationalDatabase() override;
+
+    // Ledger services
+    InboundLedgers&
+    getInboundLedgers() override;
+
+    InboundTransactions&
+    getInboundTransactions() override;
+
+    TaggedCache<uint256, AcceptedLedger>&
+    getAcceptedLedgerCache() override;
+
+    LedgerMaster&
+    getLedgerMaster() override;
+
+    LedgerCleaner&
+    getLedgerCleaner() override;
+
+    LedgerReplayer&
+    getLedgerReplayer() override;
+
+    PendingSaves&
+    pendingSaves() override;
+
+    OpenLedger&
+    openLedger() override;
+
+    OpenLedger const&
+    openLedger() const override;
+
+    // Transaction and operation services
+    NetworkOPs&
+    getOPs() override;
+
+    OrderBookDB&
+    getOrderBookDB() override;
+
+    TransactionMaster&
+    getMasterTransaction() override;
+
+    TxQ&
+    getTxQ() override;
+
+    PathRequests&
+    getPathRequests() override;
+
+    // Server services
+    ServerHandler&
+    getServerHandler() override;
+
+    perf::PerfLog&
+    getPerfLog() override;
+
+    // Configuration and state
+    bool
+    isStopping() const override;
+
+    beast::Journal
+    journal(std::string const& name) override;
+
+    boost::asio::io_context&
+    getIOContext() override;
+
+    Logs&
+    logs() override;
+
+    // Temporary: Get the underlying Application
+    Application&
+    app() override;
+
+private:
+    Application& app_;
+};
+
+}  // namespace xrpl
+
+#endif

src/xrpld/core/detail/Config.cpp

@@ -1126,4 +1126,173 @@ setup_FeeVote(Section const& section)
     return setup;
 }
 
+DatabaseCon::Setup
+setup_DatabaseCon(Config const& c, std::optional<beast::Journal> j)
+{
+    DatabaseCon::Setup setup;
+
+    setup.startUp = c.START_UP;
+    setup.standAlone = c.standalone();
+    setup.dataDir = c.legacy("database_path");
+    if (!setup.standAlone && setup.dataDir.empty())
+    {
+        Throw<std::runtime_error>("database_path must be set.");
+    }
+
+    if (!setup.globalPragma)
+    {
+        setup.globalPragma = [&c, &j]() {
+            auto const& sqlite = c.section("sqlite");
+            auto result = std::make_unique<std::vector<std::string>>();
+            result->reserve(3);
+
+            // defaults
+            std::string safety_level;
+            std::string journal_mode = "wal";
+            std::string synchronous = "normal";
+            std::string temp_store = "file";
+            bool showRiskWarning = false;
+
+            if (set(safety_level, "safety_level", sqlite))
+            {
+                if (boost::iequals(safety_level, "low"))
+                {
+                    // low safety defaults
+                    journal_mode = "memory";
+                    synchronous = "off";
+                    temp_store = "memory";
+                    showRiskWarning = true;
+                }
+                else if (!boost::iequals(safety_level, "high"))
+                {
+                    Throw<std::runtime_error>(
+                        "Invalid safety_level value: " + safety_level);
+                }
+            }
+
+            {
+                // #journal_mode Valid values : delete, truncate, persist,
+                // memory, wal, off
+                if (set(journal_mode, "journal_mode", sqlite) &&
+                    !safety_level.empty())
+                {
+                    Throw<std::runtime_error>(
+                        "Configuration file may not define both "
+                        "\"safety_level\" and \"journal_mode\"");
+                }
+                bool higherRisk = boost::iequals(journal_mode, "memory") ||
+                    boost::iequals(journal_mode, "off");
+                showRiskWarning = showRiskWarning || higherRisk;
+                if (higherRisk || boost::iequals(journal_mode, "delete") ||
+                    boost::iequals(journal_mode, "truncate") ||
+                    boost::iequals(journal_mode, "persist") ||
+                    boost::iequals(journal_mode, "wal"))
+                {
+                    result->emplace_back(boost::str(
+                        boost::format(CommonDBPragmaJournal) % journal_mode));
+                }
+                else
+                {
+                    Throw<std::runtime_error>(
+                        "Invalid journal_mode value: " + journal_mode);
+                }
+            }
+
+            {
+                // #synchronous Valid values : off, normal, full, extra
+                if (set(synchronous, "synchronous", sqlite) &&
+                    !safety_level.empty())
+                {
+                    Throw<std::runtime_error>(
+                        "Configuration file may not define both "
+                        "\"safety_level\" and \"synchronous\"");
+                }
+                bool higherRisk = boost::iequals(synchronous, "off");
+                showRiskWarning = showRiskWarning || higherRisk;
+                if (higherRisk || boost::iequals(synchronous, "normal") ||
+                    boost::iequals(synchronous, "full") ||
+                    boost::iequals(synchronous, "extra"))
+                {
+                    result->emplace_back(boost::str(
+                        boost::format(CommonDBPragmaSync) % synchronous));
+                }
+                else
+                {
+                    Throw<std::runtime_error>(
+                        "Invalid synchronous value: " + synchronous);
+                }
+            }
+
+            {
+                // #temp_store Valid values : default, file, memory
+                if (set(temp_store, "temp_store", sqlite) &&
+                    !safety_level.empty())
+                {
+                    Throw<std::runtime_error>(
+                        "Configuration file may not define both "
+                        "\"safety_level\" and \"temp_store\"");
+                }
+                bool higherRisk = boost::iequals(temp_store, "memory");
+                showRiskWarning = showRiskWarning || higherRisk;
+                if (higherRisk || boost::iequals(temp_store, "default") ||
+                    boost::iequals(temp_store, "file"))
+                {
+                    result->emplace_back(boost::str(
+                        boost::format(CommonDBPragmaTemp) % temp_store));
+                }
+                else
+                {
+                    Throw<std::runtime_error>(
+                        "Invalid temp_store value: " + temp_store);
+                }
+            }
+
+            if (showRiskWarning && j && c.LEDGER_HISTORY > SQLITE_TUNING_CUTOFF)
+            {
+                JLOG(j->warn())
+                    << "reducing the data integrity guarantees from the "
+                       "default [sqlite] behavior is not recommended for "
+                       "nodes storing large amounts of history, because of the "
+                       "difficulty inherent in rebuilding corrupted data.";
+            }
+            XRPL_ASSERT(
+                result->size() == 3,
+                "xrpl::setup_DatabaseCon::globalPragma : result size is 3");
+            return result;
+        }();
+    }
+    setup.useGlobalPragma = true;
+
+    auto setPragma =
+        [](std::string& pragma, std::string const& key, int64_t value) {
+            pragma = "PRAGMA " + key + "=" + std::to_string(value) + ";";
+        };
+
+    // Lgr Pragma
+    setPragma(setup.lgrPragma[0], "journal_size_limit", 1582080);
+
+    // TX Pragma
+    int64_t page_size = 4096;
+    int64_t journal_size_limit = 1582080;
+    if (c.exists("sqlite"))
+    {
+        auto& s = c.section("sqlite");
+        set(journal_size_limit, "journal_size_limit", s);
+        set(page_size, "page_size", s);
+        if (page_size < 512 || page_size > 65536)
+            Throw<std::runtime_error>(
+                "Invalid page_size. Must be between 512 and 65536.");
+
+        if (page_size & (page_size - 1))
+            Throw<std::runtime_error>(
+                "Invalid page_size. Must be a power of 2.");
+    }
+
+    setPragma(setup.txPragma[0], "page_size", page_size);
+    setPragma(setup.txPragma[1], "journal_size_limit", journal_size_limit);
+    setPragma(setup.txPragma[2], "max_page_count", 4294967294);
+    setPragma(setup.txPragma[3], "mmap_size", 17179869184);
+
+    return setup;
+}
 }  // namespace xrpl

src/xrpld/core/detail/DatabaseCon.cpp

@@ -1,268 +0,0 @@
-#include <xrpld/core/DatabaseCon.h>
-#include <xrpld/core/SociDB.h>
-
-#include <xrpl/basics/Log.h>
-#include <xrpl/basics/contract.h>
-
-#include <boost/algorithm/string.hpp>
-#include <boost/format.hpp>
-
-#include <memory>
-#include <unordered_map>
-
-namespace xrpl {
-
-class CheckpointersCollection
-{
-    std::uintptr_t nextId_{0};
-    // Mutex protects the CheckpointersCollection
-    std::mutex mutex_;
-    // Each checkpointer is given a unique id. All the checkpointers that are
-    // part of a DatabaseCon are part of this collection. When the DatabaseCon
-    // is destroyed, its checkpointer is removed from the collection
-    std::unordered_map<std::uintptr_t, std::shared_ptr<Checkpointer>>
-        checkpointers_;
-
-public:
-    std::shared_ptr<Checkpointer>
-    fromId(std::uintptr_t id)
-    {
-        std::lock_guard l{mutex_};
-        auto it = checkpointers_.find(id);
-        if (it != checkpointers_.end())
-            return it->second;
-        return {};
-    }
-
-    void
-    erase(std::uintptr_t id)
-    {
-        std::lock_guard lock{mutex_};
-        checkpointers_.erase(id);
-    }
-
-    std::shared_ptr<Checkpointer>
-    create(
-        std::shared_ptr<soci::session> const& session,
-        JobQueue& jobQueue,
-        Logs& logs)
-    {
-        std::lock_guard lock{mutex_};
-        auto const id = nextId_++;
-        auto const r = makeCheckpointer(id, session, jobQueue, logs);
-        checkpointers_[id] = r;
-        return r;
-    }
-};
-
-CheckpointersCollection checkpointers;
-
-std::shared_ptr<Checkpointer>
-checkpointerFromId(std::uintptr_t id)
-{
-    return checkpointers.fromId(id);
-}
-
-DatabaseCon::~DatabaseCon()
-{
-    if (checkpointer_)
-    {
-        checkpointers.erase(checkpointer_->id());
-
-        std::weak_ptr<Checkpointer> wk(checkpointer_);
-        checkpointer_.reset();
-
-        // The references to our Checkpointer held by 'checkpointer_' and
-        // 'checkpointers' have been removed, so if the use count is nonzero, a
-        // checkpoint is currently in progress. Wait for it to end, otherwise
-        // creating a new DatabaseCon to the same database may fail due to the
-        // database being locked by our (now old) Checkpointer.
-        while (wk.use_count())
-        {
-            std::this_thread::sleep_for(std::chrono::milliseconds(100));
-        }
-    }
-}
-
-DatabaseCon::Setup
-setup_DatabaseCon(Config const& c, std::optional<beast::Journal> j)
-{
-    DatabaseCon::Setup setup;
-
-    setup.startUp = c.START_UP;
-    setup.standAlone = c.standalone();
-    setup.dataDir = c.legacy("database_path");
-    if (!setup.standAlone && setup.dataDir.empty())
-    {
-        Throw<std::runtime_error>("database_path must be set.");
-    }
-
-    if (!setup.globalPragma)
-    {
-        setup.globalPragma = [&c, &j]() {
-            auto const& sqlite = c.section("sqlite");
-            auto result = std::make_unique<std::vector<std::string>>();
-            result->reserve(3);
-
-            // defaults
-            std::string safety_level;
-            std::string journal_mode = "wal";
-            std::string synchronous = "normal";
-            std::string temp_store = "file";
-            bool showRiskWarning = false;
-
-            if (set(safety_level, "safety_level", sqlite))
-            {
-                if (boost::iequals(safety_level, "low"))
-                {
-                    // low safety defaults
-                    journal_mode = "memory";
-                    synchronous = "off";
-                    temp_store = "memory";
-                    showRiskWarning = true;
-                }
-                else if (!boost::iequals(safety_level, "high"))
-                {
-                    Throw<std::runtime_error>(
-                        "Invalid safety_level value: " + safety_level);
-                }
-            }
-
-            {
-                // #journal_mode Valid values : delete, truncate, persist,
-                // memory, wal, off
-                if (set(journal_mode, "journal_mode", sqlite) &&
-                    !safety_level.empty())
-                {
-                    Throw<std::runtime_error>(
-                        "Configuration file may not define both "
-                        "\"safety_level\" and \"journal_mode\"");
-                }
-                bool higherRisk = boost::iequals(journal_mode, "memory") ||
-                    boost::iequals(journal_mode, "off");
-                showRiskWarning = showRiskWarning || higherRisk;
-                if (higherRisk || boost::iequals(journal_mode, "delete") ||
-                    boost::iequals(journal_mode, "truncate") ||
-                    boost::iequals(journal_mode, "persist") ||
-                    boost::iequals(journal_mode, "wal"))
-                {
-                    result->emplace_back(boost::str(
-                        boost::format(CommonDBPragmaJournal) % journal_mode));
-                }
-                else
-                {
-                    Throw<std::runtime_error>(
-                        "Invalid journal_mode value: " + journal_mode);
-                }
-            }
-
-            {
-                // #synchronous Valid values : off, normal, full, extra
-                if (set(synchronous, "synchronous", sqlite) &&
-                    !safety_level.empty())
-                {
-                    Throw<std::runtime_error>(
-                        "Configuration file may not define both "
-                        "\"safety_level\" and \"synchronous\"");
-                }
-                bool higherRisk = boost::iequals(synchronous, "off");
-                showRiskWarning = showRiskWarning || higherRisk;
-                if (higherRisk || boost::iequals(synchronous, "normal") ||
-                    boost::iequals(synchronous, "full") ||
-                    boost::iequals(synchronous, "extra"))
-                {
-                    result->emplace_back(boost::str(
-                        boost::format(CommonDBPragmaSync) % synchronous));
-                }
-                else
-                {
-                    Throw<std::runtime_error>(
-                        "Invalid synchronous value: " + synchronous);
-                }
-            }
-
-            {
-                // #temp_store Valid values : default, file, memory
-                if (set(temp_store, "temp_store", sqlite) &&
-                    !safety_level.empty())
-                {
-                    Throw<std::runtime_error>(
-                        "Configuration file may not define both "
-                        "\"safety_level\" and \"temp_store\"");
-                }
-                bool higherRisk = boost::iequals(temp_store, "memory");
-                showRiskWarning = showRiskWarning || higherRisk;
-                if (higherRisk || boost::iequals(temp_store, "default") ||
-                    boost::iequals(temp_store, "file"))
-                {
-                    result->emplace_back(boost::str(
-                        boost::format(CommonDBPragmaTemp) % temp_store));
-                }
-                else
-                {
-                    Throw<std::runtime_error>(
-                        "Invalid temp_store value: " + temp_store);
-                }
-            }
-
-            if (showRiskWarning && j && c.LEDGER_HISTORY > SQLITE_TUNING_CUTOFF)
-            {
-                JLOG(j->warn())
-                    << "reducing the data integrity guarantees from the "
-                       "default [sqlite] behavior is not recommended for "
-                       "nodes storing large amounts of history, because of the "
-                       "difficulty inherent in rebuilding corrupted data.";
-            }
-            XRPL_ASSERT(
-                result->size() == 3,
-                "xrpl::setup_DatabaseCon::globalPragma : result size is 3");
-            return result;
-        }();
-    }
-    setup.useGlobalPragma = true;
-
-    auto setPragma =
-        [](std::string& pragma, std::string const& key, int64_t value) {
-            pragma = "PRAGMA " + key + "=" + std::to_string(value) + ";";
-        };
-
-    // Lgr Pragma
-    setPragma(setup.lgrPragma[0], "journal_size_limit", 1582080);
-
-    // TX Pragma
-    int64_t page_size = 4096;
-    int64_t journal_size_limit = 1582080;
-    if (c.exists("sqlite"))
-    {
-        auto& s = c.section("sqlite");
-        set(journal_size_limit, "journal_size_limit", s);
-        set(page_size, "page_size", s);
-        if (page_size < 512 || page_size > 65536)
-            Throw<std::runtime_error>(
-                "Invalid page_size. Must be between 512 and 65536.");
-
-        if (page_size & (page_size - 1))
-            Throw<std::runtime_error>(
-                "Invalid page_size. Must be a power of 2.");
-    }
-
-    setPragma(setup.txPragma[0], "page_size", page_size);
-    setPragma(setup.txPragma[1], "journal_size_limit", journal_size_limit);
-    setPragma(setup.txPragma[2], "max_page_count", 4294967294);
-    setPragma(setup.txPragma[3], "mmap_size", 17179869184);
-
-    return setup;
-}
-
-std::unique_ptr<std::vector<std::string> const>
-    DatabaseCon::Setup::globalPragma;
-
-void
-DatabaseCon::setupCheckpointing(JobQueue* q, Logs& l)
-{
-    if (!q)
-        Throw<std::logic_error>("No JobQueue");
-    checkpointer_ = checkpointers.create(session_, *q, l);
-}
-
-}  // namespace xrpl

src/xrpld/core/detail/ServiceRegistryImpl.cpp

@@ -0,0 +1,276 @@
+#include <xrpld/app/main/Application.h>
+#include <xrpld/core/ServiceRegistryImpl.h>
+
+namespace xrpl {
+
+ServiceRegistryImpl::ServiceRegistryImpl(Application& app) : app_(app)
+{
+}
+
+// Core infrastructure services
+CollectorManager&
+ServiceRegistryImpl::getCollectorManager()
+{
+    return app_.getCollectorManager();
+}
+
+Family&
+ServiceRegistryImpl::getNodeFamily()
+{
+    return app_.getNodeFamily();
+}
+
+TimeKeeper&
+ServiceRegistryImpl::timeKeeper()
+{
+    return app_.timeKeeper();
+}
+
+JobQueue&
+ServiceRegistryImpl::getJobQueue()
+{
+    return app_.getJobQueue();
+}
+
+NodeCache&
+ServiceRegistryImpl::getTempNodeCache()
+{
+    return app_.getTempNodeCache();
+}
+
+CachedSLEs&
+ServiceRegistryImpl::cachedSLEs()
+{
+    return app_.cachedSLEs();
+}
+
+// Protocol and validation services
+AmendmentTable&
+ServiceRegistryImpl::getAmendmentTable()
+{
+    return app_.getAmendmentTable();
+}
+
+HashRouter&
+ServiceRegistryImpl::getHashRouter()
+{
+    return app_.getHashRouter();
+}
+
+LoadFeeTrack&
+ServiceRegistryImpl::getFeeTrack()
+{
+    return app_.getFeeTrack();
+}
+
+LoadManager&
+ServiceRegistryImpl::getLoadManager()
+{
+    return app_.getLoadManager();
+}
+
+RCLValidations&
+ServiceRegistryImpl::getValidations()
+{
+    return app_.getValidations();
+}
+
+ValidatorList&
+ServiceRegistryImpl::validators()
+{
+    return app_.validators();
+}
+
+ValidatorSite&
+ServiceRegistryImpl::validatorSites()
+{
+    return app_.validatorSites();
+}
+
+ManifestCache&
+ServiceRegistryImpl::validatorManifests()
+{
+    return app_.validatorManifests();
+}
+
+ManifestCache&
+ServiceRegistryImpl::publisherManifests()
+{
+    return app_.publisherManifests();
+}
+
+// Network services
+Overlay&
+ServiceRegistryImpl::overlay()
+{
+    return app_.overlay();
+}
+
+Cluster&
+ServiceRegistryImpl::cluster()
+{
+    return app_.cluster();
+}
+
+PeerReservationTable&
+ServiceRegistryImpl::peerReservations()
+{
+    return app_.peerReservations();
+}
+
+Resource::Manager&
+ServiceRegistryImpl::getResourceManager()
+{
+    return app_.getResourceManager();
+}
+
+// Storage services
+NodeStore::Database&
+ServiceRegistryImpl::getNodeStore()
+{
+    return app_.getNodeStore();
+}
+
+SHAMapStore&
+ServiceRegistryImpl::getSHAMapStore()
+{
+    return app_.getSHAMapStore();
+}
+
+RelationalDatabase&
+ServiceRegistryImpl::getRelationalDatabase()
+{
+    return app_.getRelationalDatabase();
+}
+
+// Ledger services
+InboundLedgers&
+ServiceRegistryImpl::getInboundLedgers()
+{
+    return app_.getInboundLedgers();
+}
+
+InboundTransactions&
+ServiceRegistryImpl::getInboundTransactions()
+{
+    return app_.getInboundTransactions();
+}
+
+TaggedCache<uint256, AcceptedLedger>&
+ServiceRegistryImpl::getAcceptedLedgerCache()
+{
+    return app_.getAcceptedLedgerCache();
+}
+
+LedgerMaster&
+ServiceRegistryImpl::getLedgerMaster()
+{
+    return app_.getLedgerMaster();
+}
+
+LedgerCleaner&
+ServiceRegistryImpl::getLedgerCleaner()
+{
+    return app_.getLedgerCleaner();
+}
+
+LedgerReplayer&
+ServiceRegistryImpl::getLedgerReplayer()
+{
+    return app_.getLedgerReplayer();
+}
+
+PendingSaves&
+ServiceRegistryImpl::pendingSaves()
+{
+    return app_.pendingSaves();
+}
+
+OpenLedger&
+ServiceRegistryImpl::openLedger()
+{
+    return app_.openLedger();
+}
+
+OpenLedger const&
+ServiceRegistryImpl::openLedger() const
+{
+    return app_.openLedger();
+}
+
+// Transaction and operation services
+NetworkOPs&
+ServiceRegistryImpl::getOPs()
+{
+    return app_.getOPs();
+}
+
+OrderBookDB&
+ServiceRegistryImpl::getOrderBookDB()
+{
+    return app_.getOrderBookDB();
+}
+
+TransactionMaster&
+ServiceRegistryImpl::getMasterTransaction()
+{
+    return app_.getMasterTransaction();
+}
+
+TxQ&
+ServiceRegistryImpl::getTxQ()
+{
+    return app_.getTxQ();
+}
+
+PathRequests&
+ServiceRegistryImpl::getPathRequests()
+{
+    return app_.getPathRequests();
+}
+
+// Server services
+ServerHandler&
+ServiceRegistryImpl::getServerHandler()
+{
+    return app_.getServerHandler();
+}
+
+perf::PerfLog&
+ServiceRegistryImpl::getPerfLog()
+{
+    return app_.getPerfLog();
+}
+
+// Configuration and state
+bool
+ServiceRegistryImpl::isStopping() const
+{
+    return app_.isStopping();
+}
+
+beast::Journal
+ServiceRegistryImpl::journal(std::string const& name)
+{
+    return app_.journal(name);
+}
+
+boost::asio::io_context&
+ServiceRegistryImpl::getIOContext()
+{
+    return app_.getIOContext();
+}
+
+Logs&
+ServiceRegistryImpl::logs()
+{
+    return app_.logs();
+}
+
+Application&
+ServiceRegistryImpl::app()
+{
+    return app_;
+}
+
+}  // namespace xrpl

src/xrpld/overlay/detail/OverlayImpl.cpp

@@ -2,8 +2,6 @@
 #include <xrpld/app/misc/NetworkOPs.h>
 #include <xrpld/app/misc/ValidatorList.h>
 #include <xrpld/app/misc/ValidatorSite.h>
-#include <xrpld/app/rdb/RelationalDatabase.h>
-#include <xrpld/app/rdb/Wallet.h>
 #include <xrpld/overlay/Cluster.h>
 #include <xrpld/overlay/detail/ConnectAttempt.h>
 #include <xrpld/overlay/detail/PeerImp.h>
@@ -19,7 +17,9 @@
 #include <xrpl/basics/random.h>
 #include <xrpl/beast/core/LexicalCast.h>
 #include <xrpl/protocol/STTx.h>
+#include <xrpl/rdb/RelationalDatabase.h>
 #include <xrpl/server/SimpleWriter.h>
+#include <xrpl/server/Wallet.h>
 
 #include <boost/algorithm/string/predicate.hpp>
 #include <boost/asio/executor_work_guard.hpp>

src/xrpld/overlay/detail/PeerReservationTable.cpp

@@ -1,10 +1,9 @@
-#include <xrpld/app/rdb/RelationalDatabase.h>
-#include <xrpld/app/rdb/Wallet.h>
-#include <xrpld/overlay/PeerReservationTable.h>
-
+#include <xrpl/core/PeerReservationTable.h>
 #include <xrpl/json/json_value.h>
 #include <xrpl/protocol/PublicKey.h>
 #include <xrpl/protocol/jss.h>
+#include <xrpl/rdb/RelationalDatabase.h>
+#include <xrpl/server/Wallet.h>
 
 #include <algorithm>
 #include <iterator>

src/xrpld/peerfinder/detail/StoreSqdb.h

@@ -2,9 +2,10 @@
 #define XRPL_PEERFINDER_STORESQDB_H_INCLUDED
 
 #include <xrpld/app/rdb/PeerFinder.h>
-#include <xrpld/core/SociDB.h>
 #include <xrpld/peerfinder/detail/Store.h>
 
+#include <xrpl/rdb/SociDB.h>
+
 namespace xrpl {
 namespace PeerFinder {
 

src/xrpld/rpc/InfoSub.h

@@ -1,13 +1,12 @@
 #ifndef XRPL_NET_INFOSUB_H_INCLUDED
 #define XRPL_NET_INFOSUB_H_INCLUDED
 
-#include <xrpld/app/misc/Manifest.h>
-
 #include <xrpl/basics/CountedObject.h>
 #include <xrpl/json/json_value.h>
 #include <xrpl/protocol/Book.h>
 #include <xrpl/protocol/ErrorCodes.h>
 #include <xrpl/resource/Consumer.h>
+#include <xrpl/server/Manifest.h>
 
 namespace xrpl {
 

src/xrpld/rpc/detail/RPCHelpers.cpp

@@ -1,6 +1,5 @@
 #include <xrpld/app/misc/Transaction.h>
 #include <xrpld/app/paths/TrustLine.h>
-#include <xrpld/app/rdb/RelationalDatabase.h>
 #include <xrpld/app/tx/detail/NFTokenUtils.h>
 #include <xrpld/rpc/Context.h>
 #include <xrpld/rpc/DeliveredAmount.h>
@@ -10,6 +9,7 @@
 #include <xrpl/protocol/AccountID.h>
 #include <xrpl/protocol/RPCErr.h>
 #include <xrpl/protocol/nftPageMask.h>
+#include <xrpl/rdb/RelationalDatabase.h>
 #include <xrpl/resource/Fees.h>
 
 #include <boost/algorithm/string/case_conv.hpp>

src/xrpld/rpc/detail/RPCLedgerHelpers.h

@@ -8,6 +8,7 @@
 #include <xrpld/rpc/detail/Tuning.h>
 
 #include <xrpl/proto/org/xrpl/rpc/v1/xrp_ledger.pb.h>
+#include <xrpl/protocol/LedgerShortcut.h>
 
 #include <optional>
 
@@ -20,8 +21,6 @@ namespace RPC {
 
 struct JsonContext;
 
-enum class LedgerShortcut { Current, Closed, Validated };
-
 /**
  * @brief Retrieves a ledger by its hash.
  *

src/xrpld/rpc/handlers/AccountTx.cpp

@@ -8,6 +8,7 @@
 #include <xrpld/rpc/MPTokenIssuanceID.h>
 #include <xrpld/rpc/Role.h>
 #include <xrpld/rpc/detail/RPCHelpers.h>
+#include <xrpld/rpc/detail/RPCLedgerHelpers.h>
 #include <xrpld/rpc/detail/Tuning.h>
 
 #include <xrpl/json/json_value.h>
@@ -26,8 +27,6 @@ using TxnsDataBinary = RelationalDatabase::MetaTxsList;
 using TxnDataBinary = RelationalDatabase::txnMetaLedgerType;
 using AccountTxArgs = RelationalDatabase::AccountTxArgs;
 using AccountTxResult = RelationalDatabase::AccountTxResult;
-
-using LedgerShortcut = RelationalDatabase::LedgerShortcut;
 using LedgerSpecifier = RelationalDatabase::LedgerSpecifier;
 
 // parses args into a ledger specifier, or returns a Json object on error
@@ -220,23 +219,19 @@ doAccountTxHelp(RPC::Context& context, AccountTxArgs const& args)
         args.limit,
         isUnlimited(context.role)};
 
-    auto const db =
-        dynamic_cast<SQLiteDatabase*>(&context.app.getRelationalDatabase());
-
-    if (!db)
-        Throw<std::runtime_error>("Failed to get relational database");
+    auto& db = context.app.getRelationalDatabase();
 
     if (args.binary)
     {
         if (args.forward)
         {
-            auto [tx, marker] = db->oldestAccountTxPageB(options);
+            auto [tx, marker] = db.oldestAccountTxPageB(options);
             result.transactions = tx;
             result.marker = marker;
         }
         else
         {
-            auto [tx, marker] = db->newestAccountTxPageB(options);
+            auto [tx, marker] = db.newestAccountTxPageB(options);
             result.transactions = tx;
             result.marker = marker;
         }
@@ -245,13 +240,13 @@ doAccountTxHelp(RPC::Context& context, AccountTxArgs const& args)
     {
         if (args.forward)
         {
-            auto [tx, marker] = db->oldestAccountTxPage(options);
+            auto [tx, marker] = db.oldestAccountTxPage(options);
             result.transactions = tx;
             result.marker = marker;
         }
         else
         {
-            auto [tx, marker] = db->newestAccountTxPage(options);
+            auto [tx, marker] = db.newestAccountTxPage(options);
             result.transactions = tx;
             result.marker = marker;
         }

src/xrpld/rpc/handlers/GetCounts.cpp

@@ -53,23 +53,19 @@ getCountsJson(Application& app, int minObjectCount)
 
     if (app.config().useTxTables())
     {
-        auto const db =
-            dynamic_cast<SQLiteDatabase*>(&app.getRelationalDatabase());
+        auto& db = app.getRelationalDatabase();
 
-        if (!db)
-            Throw<std::runtime_error>("Failed to get relational database");
-
-        auto dbKB = db->getKBUsedAll();
+        auto dbKB = db.getKBUsedAll();
 
         if (dbKB > 0)
             ret[jss::dbKBTotal] = dbKB;
 
-        dbKB = db->getKBUsedLedger();
+        dbKB = db.getKBUsedLedger();
 
         if (dbKB > 0)
             ret[jss::dbKBLedger] = dbKB;
 
-        dbKB = db->getKBUsedTransaction();
+        dbKB = db.getKBUsedTransaction();
 
         if (dbKB > 0)
             ret[jss::dbKBTransaction] = dbKB;

src/xrpld/rpc/handlers/Tx.cpp

@@ -3,18 +3,19 @@
 #include <xrpld/app/misc/DeliverMax.h>
 #include <xrpld/app/misc/NetworkOPs.h>
 #include <xrpld/app/misc/Transaction.h>
-#include <xrpld/app/rdb/RelationalDatabase.h>
 #include <xrpld/rpc/CTID.h>
 #include <xrpld/rpc/Context.h>
 #include <xrpld/rpc/DeliveredAmount.h>
 #include <xrpld/rpc/GRPCHandlers.h>
 #include <xrpld/rpc/MPTokenIssuanceID.h>
+#include <xrpld/rpc/Status.h>
 
 #include <xrpl/basics/ToString.h>
 #include <xrpl/protocol/ErrorCodes.h>
 #include <xrpl/protocol/NFTSyntheticSerializer.h>
 #include <xrpl/protocol/RPCErr.h>
 #include <xrpl/protocol/jss.h>
+#include <xrpl/rdb/RelationalDatabase.h>
 
 #include <regex>
 

src/xrpld/rpc/handlers/TxHistory.cpp

@@ -2,13 +2,13 @@
 #include <xrpld/app/main/Application.h>
 #include <xrpld/app/misc/DeliverMax.h>
 #include <xrpld/app/misc/Transaction.h>
-#include <xrpld/app/rdb/RelationalDatabase.h>
 #include <xrpld/rpc/Context.h>
 #include <xrpld/rpc/Role.h>
 
 #include <xrpl/protocol/ErrorCodes.h>
 #include <xrpl/protocol/RPCErr.h>
 #include <xrpl/protocol/jss.h>
+#include <xrpl/rdb/RelationalDatabase.h>
 #include <xrpl/resource/Fees.h>
 
 namespace xrpl {