Migrate cardano-rpc submit handler to Ledger.txIdTx

Replace the deprecated getTxBody/getTxId chain in
Cardano.Rpc.Server.Internal.UtxoRpc.Submit with a direct ledger projection:
pattern-match the API Tx, then compute the TxId via Cardano.Ledger.Core.txIdTx
(which is bodyTxL composed with txIdTxBody) and lift back through
fromShelleyTxId.

Author: Jimbo4350

.changes/20260511_cardano_rpc_migrate_txid.yml

@@ -0,0 +1,8 @@
+project: cardano-rpc
+pr: 1200
+kind:
+  - refactoring
+description: |
+  Migrate the UtxoRpc submit handler off the deprecated `getTxBody` /
+  `getTxId` chain. The transaction id is now computed directly from the
+  ledger transaction via `Cardano.Ledger.Core.txIdTx`.

cardano-rpc/src/Cardano/Rpc/Server/Internal/UtxoRpc/Submit.hs

@@ -21,6 +21,8 @@ import Cardano.Rpc.Server.Internal.Monad
 import Cardano.Rpc.Server.Internal.Orphans ()
 import Cardano.Rpc.Server.Internal.Tracing
 
+import Cardano.Ledger.Core qualified as L
+
 import RIO hiding (toList)
 
 import Data.Default
@@ -61,7 +63,9 @@ submitTxMethod req = do
       submitTxToNodeLocal nodeConnInfo (TxInMode sbe tx) <&> \case
         TxSubmitError e -> Left $ TraceRpcSubmitN2cConnectionError e
         TxSubmitFail reason -> Left $ TraceRpcSubmitTxValidationError reason
-        TxSubmitSuccess -> Right $ getTxId $ getTxBody tx
+        TxSubmitSuccess ->
+          let ShelleyTx _ ledgerTx = tx
+           in Right $ shelleyBasedEraConstraints sbe $ fromShelleyTxId (L.txIdTx ledgerTx)
     putTraceThrowEither result
 
   putTraceThrowEither v = withFrozenCallStack $ do