How to Check the Balance of a Ethereum Wallet Address?

You can retrieve the balance of an Ethereum address using libraries like web3.js or ethers.js.

Check the Balance of a Ethereum Wallet Address Using web3.js

First, ensure you have the web3 library installed:

npm install web3

Here’s the code. The following is based on Infura which has a free plan API, rate limit is 10 requests per second.

const Web3 = require('web3');

const INFURA_ENDPOINT = 'YOUR_INFURA_ENDPOINT';
const web3 = new Web3(INFURA_ENDPOINT);

const getBalance = async (address) => {
    const balanceWei = await web3.eth.getBalance(address);
    const balanceEth = web3.utils.fromWei(balanceWei, 'ether');
    return balanceEth;
};

const address = '0x...';  // Replace with your address
getBalance(address).then(balance => {
    console.log(`Balance of ${address}: ${balance} ETH`);
});

Check the Balance of a Ethereum Wallet Address Using ethers.js

Install the required library:

npm install ethers

Here’s the code:

const { providers } = require('ethers');

const INFURA_PROJECT_ID = 'YOUR_INFURA_PROJECT_ID';  // Replace with your Infura Project ID
const provider = new providers.InfuraProvider('mainnet', INFURA_PROJECT_ID);

const getBalance = async (address) => {
    const balanceWei = await provider.getBalance(address);
    const balanceEth = ethers.utils.formatEther(balanceWei);
    return balanceEth;
};

const address = '0x...';  // Replace with your address
getBalance(address).then(balance => {
    console.log(`Balance of ${address}: ${balance} ETH`);
});

Replace ‘YOUR_INFURA_ENDPOINT’ or ‘YOUR_INFURA_PROJECT_ID’ with your actual Infura endpoint or project ID. If you’re using another service or running a local Ethereum node, adjust the provider setup accordingly.

Check the Balance of a Ethereum Wallet Address Using Alchemy API

With Alchemy API, we can also easily query the RestFul API to query the balance of any given ETH Wallet Address, see below:

const getBalanceETH_Alchemy = async (address) => {
    const ALCHEMY_API_KEY = "REPLACE_WITH_API_KEY";
    const MAIN_ENDPOINT_ALCHEMY = `https://eth-mainnet.g.alchemy.com/v2/${ALCHEMY_API_KEY}`;
    try {
        const data = {
            id: 1,
            jsonrpc: "2.0",
            method: "eth_getBalance",
            params: [
                address,
                "latest"
            ]
        };

        // Making POST request to fetch gas price
        const resp = await axios.post(MAIN_ENDPOINT_ALCHEMY, data, {
            headers: {
                'accept': 'application/json',
                'content-type': 'application/json'
            }
        });

        if (resp && resp.data && resp.data.result) {
            return parseInt(resp.data.result, 16)/1e18;
        }
        return null;
    } catch (error) {
        console.error(`Error fetching data: ${error}`);
        return null;
    }
}

Check the Balance of a Ethereum Wallet Address Using Etherscan API

The Etherscan provides Free API to query the balance. The Free Plan has a rate limit of 5 Requests per second. See Using Etherscan API to Query the Balance of a ETH Wallet

const getBalanceETH_Etherscan = async (address) => {
    const ETHERSCAN_API_KEY = "REPLACE_WITH_KEY";
    const api = `https://api.etherscan.io/api?module=account&action=balance&apikey=${ETHERSCAN_API_KEY}&address=${address}&tag=latest`;
    try {
        const response = await fetch(api, {
            method: 'GET',
            headers: {
                'Content-Type': 'application/json',
            }
        });

        const data = await response.json();
        //console.log(data);
        if (data.status == "1" && data.message == "OK" && data.result) {
            return (data.result)/(1000000000000000000);
        }
        return null;
    } catch (error) {
        console.error('Error fetching balance:', error);
        return null;
    }
}

Ethereum Blockchain

• How to Fix "Returned Error: replacement transaction underpriced" when Sending the ETH on Ethereum Blockchain?
• How to Transfer or Send ETH to Another Wallet on Ethereum Blockchain?
• How to Check the Balance of a Ethereum Wallet Address?
• How to Check if a Given String is a Valid Ethereum Wallet Address?
• How to Get the Gas Price and Gas Fee on Ethereum Blockchain?
• How to Get the Latest Block Number (Head Block) on Ethereum Blockchain?
• Today.. Gas Fee was High
• Gas Fee is Fixed Regardless the Amount of ETH to Send
• The Simple Way to Watch the Transactions of an ETH Account
• Watch Gas Price Before You Send Steem to Swap ETH

–EOF (The Ultimate Computing & Technology Blog) —