Estimate Gas

Recommended: JavaScript SDK for React Native

While this SDK is still supported, we recommend using newer JavaScript SDK, which is optimized for React Native, but also comes with a host of other benefits.

Before sending a transaction, you can use the public client to estimate the gas fees. Some chains also support custom gas estimation methods.

Here are examples of how to get a gas estimate using viem:

Estimate Gas Function

General

import { mainnet } from 'viem/chains';
import { toHex, parseEther } from 'viem';
import { dynamicClient } from './dynamicClient';

const estimateGas = async () => {
  const publicClient = await dynamicClient.viem.createPublicClient({
    chain: mainnet,
  });

  const estimate = await publicClient.estimateGas({
    from: dynamicClient.wallets.primary.address as `0x${string}`,
    to: '0x123' as `0x${string}`,
    value: toHex(parseEther('0.001')),
  })

  console.log(estimate);
}

Linea

import { linea } from 'viem/chains';
import { toHex, parseEther } from 'viem';
import { dynamicClient } from './dynamicClient';

const estimateGas = async () => {
  const publicClient = await dynamicClient.viem.createPublicClient({
    chain: linea,
  });

  const estimate = await publicClient.estimateGas({
    from: dynamicClient.wallets.primary.address as `0x${string}`,
    to: '0x123' as `0x${string}`,
    value: toHex(parseEther('0.001')),
  })

  console.log(estimate);
}