chore: Dedupe transaction hashes on resend (#802)

Author: arcoraven

src/worker/tasks/sendTransactionWorker.ts

@@ -472,7 +472,10 @@ const _resendTransaction = async (
     resendCount,
     sentAt: new Date(),
     sentAtBlock: await getBlockNumberish(chainId),
-    sentTransactionHashes: [...sentTransactionHashes, transactionHash],
+    // Dedupe transaction hashes.
+    sentTransactionHashes: [
+      ...new Set([...sentTransactionHashes, transactionHash]),
+    ],
     gas: populatedTransaction.gas,
     gasPrice: populatedTransaction.gasPrice,
     maxFeePerGas: populatedTransaction.maxFeePerGas,