📤 eth_sendRawTransaction - Base Chain

What This Method Does

The eth_sendRawTransaction method broadcasts a signed transaction to the Base network. This is how you submit transactions that have already been signed offline, allowing you to maintain custody of your private keys while interacting with the network.

🔑 Security Benefit: By signing transactions offline and only sending the signed result, your private keys never need to be exposed to the internet.

Parameters

Parameter	What to Provide
`Transaction data`	The signed transaction data as a hex string (starts with "0x")

What You'll Get Back

Transaction hash - The 32-byte hash of the submitted transaction, which you can use to track its status

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Request Format

POST https://base-mainnet.chainnodes.org/YOUR-API-KEY

Example

HTTPS POST Request with a JSON RPC call in the body
Replace YOUR-API-KEY with the API key from your Chainnodes.org Dashboard
You can use a different supported network by replacing base-mainnet

curl https://base-mainnet.chainnodes.org/YOUR-API-KEY \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_sendRawTransaction","params":["0x02f8b30121847735940085093a1ca031833030d094a0b86991c6218b36c1d19d4a2e9eb0ce3606eb480b844a9059cbb000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc20000000000000000000000000000000000000000000000000000000005f5e100c080a0ed4be6417e56f9692aec11f846b8e37345f1d7ab7468b49f7bd9fe5a44f0cdfda01d52afeac47a51fef92c27c304667241b27b7056f68aa8b92b7e7e8ed4869514"],"id":1}'

Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b"
}

The result contains the transaction hash, which you can use to track the status of your transaction.

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Creating Transactions for Base Chain

When creating transactions to send on Base, you need to be aware of several Base-specific parameters:

1. Base Chain ID

Base mainnet uses chain ID 8453 (0x2105 in hex), and Base Goerli testnet uses 84531 (0x14a33 in hex). This must be included in your transaction signing process.

2. Gas Parameters for Base

Base uses EIP-1559 style gas pricing with typically lower fees than Ethereum mainnet:

// Get recommended values for Base
const maxPriorityFeePerGas = await provider.send("eth_maxPriorityFeePerGas", []);
const block = await provider.getBlock("latest");
const baseFee = block.baseFeePerGas;
 
// Add a small buffer to the base fee for safety
const maxFeePerGas = baseFee.mul(2).add(maxPriorityFeePerGas);

3. Transaction Types

Base supports the same transaction types as Ethereum:

Type 0: Legacy transactions
Type 1: EIP-2930 transactions with access lists
Type 2: EIP-1559 transactions (recommended for Base)

Complete Example: Creating and Sending a Transaction

Here's a complete example using ethers.js to create, sign, and send a transaction on Base:

const { ethers } = require("ethers");
 
async function sendTransaction() {
  // Connect to Base network
  const provider = new ethers.providers.JsonRpcProvider("https://base-mainnet.chainnodes.org/YOUR-API-KEY");
  
  // Create a wallet (in production, use a safer method to handle private keys)
  const privateKey = "0xYOUR_PRIVATE_KEY";
  const wallet = new ethers.Wallet(privateKey, provider);
  
  // Get the current recommended gas values
  const maxPriorityFeePerGas = ethers.utils.parseUnits("0.1", "gwei"); // 0.1 Gwei is often sufficient on Base
  const block = await provider.getBlock("latest");
  const baseFee = block.baseFeePerGas;
  const maxFeePerGas = baseFee.mul(2).add(maxPriorityFeePerGas); // 2x base fee + priority fee
  
  // Create transaction object
  const tx = {
    to: "0xRecipientAddress",
    value: ethers.utils.parseEther("0.01"), // Sending 0.01 ETH
    maxPriorityFeePerGas,
    maxFeePerGas,
    gasLimit: 21000, // Standard transfer gas limit
    chainId: 8453,   // Base mainnet chain ID
    type: 2          // EIP-1559 transaction
  };
  
  // Sign transaction
  const signedTx = await wallet.signTransaction(tx);
  
  // Send the raw transaction
  const txHash = await provider.send("eth_sendRawTransaction", [signedTx]);
  
  console.log(`Transaction sent: ${txHash}`);
  return txHash;
}

Common Errors & Solutions

Error	Possible Cause	Solution
`nonce too low`	The account's nonce is higher than the one specified	Get the current nonce with `eth_getTransactionCount`
`insufficient funds`	Account doesn't have enough ETH	Add more ETH to your account
`gas price too low`	Base fee or priority fee is too low	Increase `maxFeePerGas` and/or `maxPriorityFeePerGas`
`already known`	The same transaction was already submitted	This is normal if you resubmit; wait for confirmation
`replacement transaction underpriced`	Trying to replace a pending tx with too low gas price	Increase gas price at least 10% over the pending tx

Related Methods

eth_getTransactionCount - Get the current nonce for your account
eth_maxPriorityFeePerGas - Get a suggested priority fee
eth_getTransactionReceipt - Check if your transaction was confirmed
eth_estimateGas - Estimate gas needed for a transaction

JSON-RPC Base API Documentation by CHAINNODES is based on Reth node client. Contact us if you are interested in specific methods that are only available on geth, besu, Nethermind or Erigon

eth_getUncleByBlockNumberAndIndex eth_maxPriorityFeePerGas