web3js获取区块链钱包地址指定代币余额

获取指定钱包地址默认代币

var account = ethereum.selectedAddress
// 获取余额
ethereum.request({
      method: 'eth_getBalance',
      params: [
        account ,
        'latest'
      ]
  })
  .then((result) => {
      console.log("获取余额success--->" + result)
      let formatEther = ethers.utils.formatEther(result); //16进制的wei
      console.log(formatEther)
  })
  .catch((error) => {
      console.error(error)
  });

获取指定钱包地址指定代币

var account = ethereum.selectedAddress
const USDTContractAddress = "..."; // USDT合约地址
const USDTContractABI = [...]; // USDT合约ABI
// 创建一个web3实例，连接到metamask提供的provider
const web3 = new Web3(window.ethereum);
// 创建一个USDT合约实例
const USDTContract = new web3.eth.Contract(USDTContractABI, USDTContractAddress);
USDTContract.methods.balanceOf(account).call((error, result) => {
  if (error) {
    console.error(error)
  } else {
    console.log(result);
    let formatEther = ethers.utils.formatEther(result); //16进制的wei
    console.log(formatEther)
  }
});