eth_estimateL1Fee - Estimate L1 Data Fee

Dwellir's public Optimism endpoints do not expose the L1 fee oracle on the shared archive surface. A live call to eth_estimateL1Fee returns -32601.

When to Use This Method

Use this page to confirm that a public Dwellir Optimism endpoint does not currently expose the L1 fee oracle. For standard transaction pricing, use eth_estimateGas and eth_gasPrice.

Live Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32601,
    "message": "the method eth_estimateL1Fee does not exist/is not available"
  }
}

Fallback Check

import { JsonRpcProvider } from 'ethers';

const provider = new JsonRpcProvider('https://api-optimism-mainnet-archive.n.dwellir.com/YOUR_API_KEY');

async function supportsL1FeeOracle(txObject) {
  try {
    await provider.send('eth_estimateL1Fee', [txObject]);
    return true;
  } catch (error) {
    if (error?.code === -32601) {
      return false;
    }
    throw error;
  }
}

console.log('L1 fee oracle available:', await supportsL1FeeOracle({
  to: '0x0000000000000000000000000000000000000000',
  data: '0x'
}));

Supported Alternatives

• Use eth_estimateGas for execution cost.
• Use eth_gasPrice for current gas pricing.
• Use the Optimism documentation if you need a separate L1 data fee oracle.

Need help? Contact our support team or check the Optimism documentation.