Vérifiez l'équilibre d'un portefeuille en js
const testnet = 'https://ropsten.infura.io/';
const walletAddress = '0x8690F1feff62008A396B31c2C3f380bD0Ca6d8b8';
const web3 = new Web3(new Web3.providers.HttpProvider(testnet));
var balance = web3.eth.getBalance(walletAddress); //Will give value in.
balance = web3.toDecimal(balance);
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