eth_sendRawTransactionSync - Monad

Example code for the eth_sendRawTransactionSync JSON-RPC method. Complete guide on how to use eth_sendRawTransactionSync JSON-RPC in GetBlock Web3 documentation.

This is a Monad-specific method (EIP-7966). Unlike eth_sendRawTransaction, this method waits for the transaction to be included in a block before returning.

Parameters

Parameter	Type	Required	Description
data	string	Yes	The signed transaction data as a hex string.

Request

cURL

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "eth_sendRawTransactionSync",
    "params": ["0xf86c0a8502540be400825208944bbeeb066ed09b7aed07bf39eee0460dfa26152088016345785d8a0000801ba0e2c.."],
    "id": "getblock.io"
}'

Axios

Requesr

Rust

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": {
        "transactionHash": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331",
        "blockHash": "0xdc0818cf78f21a8e70579cb46a43643f78291264dda342ae31049421c82d21ae",
        "blockNumber": "0x1b4"
    }
}

Response Parameters

Field	Type	Description
transactionHash	string	The 32-byte transaction hash.
blockHash	string	The 32-byte hash of the block containing the transaction.
blockNumber	string	The block number in hex where the transaction was included.

Use Case

The eth_sendRawTransactionSync method is essential for:

• Applications requiring immediate confirmation feedback

• High-frequency trading where confirmation timing is critical

• Payment processing systems

• Sequential transaction dependencies

• Atomic operation workflows

• Simplified transaction submission without polling

Error Handling

Status Code	Error Message	Cause
403	Forbidden	Missing or invalid ACCESS-TOKEN.
-32602	Invalid params	Invalid transaction data format.
-32000	Nonce too low	Transaction nonce already used.
-32000	Insufficient funds	Not enough MON for gas.
-32000	Transaction timeout	Transaction not included within timeout.
-32003	Transaction rejected	Transaction validation failed.

Comparison with eth_sendRawTransaction

Feature	eth_sendRawTransaction	eth_sendRawTransactionSync
Returns	Immediately after submission	After block inclusion
Response	Transaction hash only	Hash + block info
Polling needed	Yes	No
Timeout	N/A	Yes (server-defined)
Best for	Fire-and-forget	Confirmation-critical ops

Web3 Integration

Ether.js

import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider('https://go.getblock.io/<ACCESS-TOKEN>/');

// Use eth_sendRawTransactionSync for sequential operations
async function sendSyncTransaction(signedTx) {
    const result = await provider.send('eth_sendRawTransactionSync', [signedTx]);
    console.log('Confirmed in block:', parseInt(result.blockNumber, 16));
    return result;
}

// First transaction
const result1 = await sendSyncTransaction(signedTx1);

// Second transaction (can safely use incremented nonce)
const result2 = await sendSyncTransaction(signedTx2);