Decouple app/tx from Application

include/xrpl/core/NetworkIDService.h

@@ -0,0 +1,36 @@
+#ifndef XRPL_CORE_NETWORKIDSERVICE_H_INCLUDED
+#define XRPL_CORE_NETWORKIDSERVICE_H_INCLUDED
+
+#include <cstdint>
+
+namespace xrpl {
+
+/** Service that provides access to the network ID.
+
+    This service provides read-only access to the network ID configured
+    for this server. The network ID identifies which network (mainnet,
+    testnet, devnet, or custom network) this server is configured to
+    connect to.
+
+    Well-known network IDs:
+    - 0: Mainnet
+    - 1: Testnet
+    - 2: Devnet
+    - 1025+: Custom networks (require NetworkID field in transactions)
+*/
+class NetworkIDService
+{
+public:
+    virtual ~NetworkIDService() = default;
+
+    /** Get the configured network ID
+     *
+     * @return The network ID this server is configured for
+     */
+    virtual std::uint32_t
+    getNetworkID() const = 0;
+};
+
+}  // namespace xrpl
+
+#endif

include/xrpl/core/ServiceRegistry.h

@@ -4,10 +4,11 @@
 #include <xrpl/basics/Blob.h>
 #include <xrpl/basics/SHAMapHash.h>
 #include <xrpl/basics/TaggedCache.h>
+#include <xrpl/beast/utility/Journal.h>
 #include <xrpl/ledger/CachedSLEs.h>
 #include <xrpl/protocol/Protocol.h>
 
-#include <boost/asio.hpp>
+#include <boost/asio/io_context.hpp>
 
 #include <cstdint>
 #include <memory>
@@ -30,6 +31,7 @@ class AmendmentTable;
 class Application;
 class Cluster;
 class CollectorManager;
+class Config;
 class DatabaseCon;
 class Family;
 class HashRouter;
@@ -43,6 +45,7 @@ class LoadFeeTrack;
 class LoadManager;
 class ManifestCache;
 class NetworkOPs;
+class NetworkIDService;
 class OpenLedger;
 class OrderBookDB;
 class Overlay;
@@ -102,6 +105,9 @@ public:
     virtual CachedSLEs&
     cachedSLEs() = 0;
 
+    virtual NetworkIDService&
+    getNetworkIDService() = 0;
+
     // Protocol and validation services
     virtual AmendmentTable&
     getAmendmentTable() = 0;
@@ -217,6 +223,9 @@ public:
     virtual Logs&
     logs() = 0;
 
+    virtual std::optional<uint256> const&
+    trapTxID() const = 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&