diff --git a/transactions/jito-rpc-transaction-executor.ts b/transactions/jito-rpc-transaction-executor.ts
index bcb8da1..cac2739 100644
--- a/transactions/jito-rpc-transaction-executor.ts
+++ b/transactions/jito-rpc-transaction-executor.ts
@@ -44,7 +44,7 @@ export class JitoTransactionExecutor implements TransactionExecutor {
     transaction: VersionedTransaction,
     payer: Keypair,
     latestBlockhash: BlockhashWithExpiryBlockHeight,
-  ): Promise<{ confirmed: boolean; signature?: string }> {
+  ): Promise<{ confirmed: boolean; signature?: string; error?: string }> {
     logger.debug('Starting Jito transaction execution...');
     this.JitoFeeWallet = this.getRandomValidatorKey(); // Update wallet key each execution
     logger.trace(`Selected Jito fee wallet: ${this.JitoFeeWallet.toBase58()}`);
diff --git a/transactions/warp-transaction-executor.ts b/transactions/warp-transaction-executor.ts
index da4245f..be26786 100644
--- a/transactions/warp-transaction-executor.ts
+++ b/transactions/warp-transaction-executor.ts
@@ -21,7 +21,7 @@ export class WarpTransactionExecutor implements TransactionExecutor {
     transaction: VersionedTransaction,
     payer: Keypair,
     latestBlockhash: BlockhashWithExpiryBlockHeight,
-  ): Promise<{ confirmed: boolean; signature?: string }> {
+  ): Promise<{ confirmed: boolean; signature?: string; error?: string }> {
     logger.debug('Executing transaction...');
 
     try {
@@ -41,7 +41,7 @@ export class WarpTransactionExecutor implements TransactionExecutor {
       const warpFeeTx = new VersionedTransaction(warpFeeMessage);
       warpFeeTx.sign([payer]);
 
-      const response = await axios.post<{ confirmed: boolean; signature: string, error?: string }>(
+      const response = await axios.post<{ confirmed: boolean; signature: string; error?: string }>(
         'https://tx.warp.id/transaction/execute',
         {
           transactions: [bs58.encode(warpFeeTx.serialize()), bs58.encode(transaction.serialize())],