eth_estimateGas

Generates and returns an estimate of how much gas is necessary for Optimism L2 transactions.

Parameters

1. Transaction Object
   • to - Destination address
   • from (optional) - Sender address
   • value (optional) - Value to send
   • data (optional) - Transaction data

Implementation Examples

cURL

curl -X POST https://api-optimism-mainnet-archive.n.dwellir.com/YOUR_API_KEY \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_estimateGas",
    "params": [{
      "to": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb",
      "value": "0xde0b6b3a7640000"
    }],
    "id": 1
  }'

JavaScript

// Estimate gas for Optimism L2 transaction
const response = await fetch('https://api-optimism-mainnet-archive.n.dwellir.com/YOUR_API_KEY', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    jsonrpc: '2.0',
    method: 'eth_estimateGas',
    params: [{
      to: "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb",
      value: "0xde0b6b3a7640000" // 1 ETH
    }],
    id: 1
  })
});

const data = await response.json();
const gasEstimate = parseInt(data.result, 16);
console.log('Estimated L2 gas:', gasEstimate);

Response Example

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x5208"
}

This represents 21,000 gas for a simple ETH transfer on Optimism L2.

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