以太-在web3js中，具有空方法的新合约实例

const Web3 = require('web3');

const web3 = new Web3('https://api.infura.io/v1/jsonrpc/mainnet');

const contractABI = [
  {
    "constant": true,
    "inputs": [],
    "name": "emptyMethod",
    "outputs": [],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
  }
];

const contractAddress = '0xContractAddress'; // 合约地址
const contractInstance = new web3.eth.Contract(contractABI, contractAddress);

contractInstance.methods.emptyMethod().call((error, result) => {
  if (error) {
    console.error(error);
  } else {
    console.log(result);
  }
});