diff --git a/src/transactions/decoders.ts b/src/transactions/decoders.ts
index d112a7c..ccc635b 100644
--- a/src/transactions/decoders.ts
+++ b/src/transactions/decoders.ts
@@ -85,6 +85,12 @@ export const decodeTransaction = (tx: GenLayerRawTransaction): GenLayerTransacti
     txData: txData,
     txDataDecoded: txDataDecoded,
 
+    // Same identifier exposed under both names; the on-chain Solidity struct
+    // uses `txId`, the legacy localnet RPC used `hash`. Populate both so
+    // consumers can rely on either.
+    hash: tx.txId,
+    txId: tx.txId,
+
     currentTimestamp: tx.currentTimestamp.toString(),
     numOfInitialValidators: numOfInitialValidators?.toString() ?? "0",
     txSlot: tx.txSlot.toString(),
@@ -241,6 +247,11 @@ export const simplifyTransactionReceipt = (tx: GenLayerTransaction): GenLayerTra
 };
 
 export const decodeLocalnetTransaction = (tx: GenLayerTransaction): GenLayerTransaction => {
+  // Mirror the testnet decoder: expose the identifier under both `hash`
+  // (legacy localnet name) and `txId` (on-chain Solidity name).
+  if (tx.hash && !tx.txId) tx.txId = tx.hash;
+  else if (tx.txId && !tx.hash) tx.hash = tx.txId;
+
   if (!tx.data) return tx;
   try {
     const leaderReceipt = tx.consensus_data?.leader_receipt;
diff --git a/src/types/transactions.ts b/src/types/transactions.ts
index db3cb4a..dda0cf4 100644
--- a/src/types/transactions.ts
+++ b/src/types/transactions.ts
@@ -255,7 +255,9 @@ export type GenLayerTransaction = {
   status?: TransactionStatus | number;
   statusName?: TransactionStatus;
 
-  // hash: localnet // txId: testnet// hash: localnet // txId: testnet
+  // The same identifier is exposed under both names: `txId` matches the
+  // on-chain Solidity struct field; `hash` is kept for back-compat with the
+  // legacy localnet RPC. Decoders populate both, so consumers can use either.
   hash?: TransactionHash;
   txId?: TransactionHash;
 
diff --git a/tests/transactions.test.ts b/tests/transactions.test.ts
index fd1e82b..5f018fb 100644
--- a/tests/transactions.test.ts
+++ b/tests/transactions.test.ts
@@ -322,6 +322,12 @@ describe("decodeTransaction", () => {
     const names = (decoded.lastRound as any)?.validatorVotesName;
     expect(names).toEqual(["AGREE", "AGREE", "AGREE"]);
   });
+
+  it("should expose the identifier under both `txId` and `hash`", () => {
+    const decoded = decodeTransaction(makeRawTx());
+    expect(decoded.txId).toBe("0x" + "ff".repeat(32));
+    expect(decoded.hash).toBe(decoded.txId);
+  });
 });
 
 describe("simplifyTransactionReceipt", () => {