How to Check the Balance of a Ethereum Wallet Address?

npm install web3

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`);
});

npm install ethers

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`);
});

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;
    }
}

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;
    }
}