Decouple app/tx from Application

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

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

@@ -47,6 +47,7 @@ class LoadFeeTrack;
 class LoadManager;
 class ManifestCache;
 class NetworkOPs;
+class NetworkIDService;
 class OpenLedger;
 class OrderBookDB;
 class Overlay;
@@ -112,6 +113,9 @@ public:
     virtual LedgerConfigService&
     getLedgerConfigService() = 0;
 
+    virtual NetworkIDService&
+    getNetworkIDService() = 0;
+
     // Protocol and validation services
     virtual AmendmentTable&
     getAmendmentTable() = 0;
@@ -227,6 +231,9 @@ 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&