使用web3.js监听以太坊智能合约event

var Web3 = require("web3")

var web3;

if (typeof web3 !== 'undefined') {
    web3 = new Web3(web3.currentProvider);
} else {
    web3 = new Web3(new Web3.providers.WebsocketProvider("ws://172.17.116.158:8546"));
}
        
var contractAbi = [{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"id","type":"bytes32"},{"indexed":true,"internalType":"address","name":"proposer","type":"address"},{"indexed":true,"internalType":"address","name":"dst","type":"address"},{"indexed":false,"internalType":"uint256","name":"time","type":"uint256"}],"name":"LogCreateProposal","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"id","type":"bytes32"},{"indexed":true,"internalType":"address","name":"dst","type":"address"},{"indexed":false,"internalType":"uint256","name":"time","type":"uint256"}],"name":"LogPassProposal","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"id","type":"bytes32"},{"indexed":true,"internalType":"address","name":"dst","type":"address"},{"indexed":false,"internalType":"uint256","name":"time","type":"uint256"}],"name":"LogRejectProposal","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"val","type":"address"},{"indexed":false,"internalType":"uint256","name":"time","type":"uint256"}],"name":"LogSetUnpassed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"id","type":"bytes32"},{"indexed":true,"internalType":"address","name":"voter","type":"address"},{"indexed":false,"internalType":"bool","name":"auth","type":"bool"},{"indexed":false,"internalType":"uint256","name":"time","type":"uint256"}],"name":"LogVote","type":"event"},{"inputs":[],"name":"MaxValidators","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MinimalStakingCoin","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PROPOSAL_ADDR","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ProposalAddr","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PunishContractAddr","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"StakingLockPeriod","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ValidatorContractAddr","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"WithdrawProfitPeriod","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"initialized","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"miner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"pass","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"proposalLastingPeriod","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"proposals","outputs":[{"internalType":"address","name":"proposer","type":"address"},{"internalType":"address","name":"dst","type":"address"},{"internalType":"string","name":"details","type":"string"},{"internalType":"uint256","name":"createTime","type":"uint256"},{"internalType":"uint16","name":"agree","type":"uint16"},{"internalType":"uint16","name":"reject","type":"uint16"},{"internalType":"bool","name":"resultExist","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"val","type":"address"},{"internalType":"address","name":"punish","type":"address"},{"internalType":"address","name":"proposal","type":"address"}],"name":"setContracts","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"miner_","type":"address"}],"name":"setMiner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"votes","outputs":[{"internalType":"address","name":"voter","type":"address"},{"internalType":"uint256","name":"voteTime","type":"uint256"},{"internalType":"bool","name":"auth","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"vals","type":"address[]"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"dst","type":"address"},{"internalType":"string","name":"details","type":"string"}],"name":"createProposal","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"id","type":"bytes32"},{"internalType":"bool","name":"auth","type":"bool"}],"name":"voteProposal","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"val","type":"address"}],"name":"setUnpassed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}];

var contractaAddress = "0x000000000000000000000000000000000000F002";
        
MyContract = new web3.eth.Contract(contractAbi, contractaAddress);
                //console.log(MyContract.events.orderlog);
        
var myEvent = MyContract.events.LogCreateProposal({
        filter:{},
        fromBlock: 0
}, function(error, event){})
        .on('data', function(event){
        console.log(event); // same results as the optional callback above
})
        .on('changed', function(event){
                    // remove event from local database
        })        
    .on('error', console.error);
   

运行

npm init -y
npm install web3 --save
node map_event.js

测试数据

{
  address: '0x000000000000000000000000000000000000F002',
  blockNumber: 64274,
  transactionHash: '0x950203bc5d391a6b8180c5be6d290403f39fe81a8666e40b74cc3b9b094ce1a6',
  transactionIndex: 0,
  blockHash: '0x9abb16d015c49268c04909bcea414994d9bc0867dc8648b5e3dd33071d86daf5',
  logIndex: 0,
  removed: false,
  id: 'log_14a4176e',
  returnValues: Result {
    '0': '0x88437e94b8ffc61e30087ba66182c8f291e4af36d289ae299f676f014fdba411',
    '1': '0xc65dD4299C682f335d6e15e2B5774D015E01E479',
    '2': '0xc65dD4299C682f335d6e15e2B5774D015E01E479',
    '3': '1614340623',
    id: '0x88437e94b8ffc61e30087ba66182c8f291e4af36d289ae299f676f014fdba411',
    proposer: '0xc65dD4299C682f335d6e15e2B5774D015E01E479',
    dst: '0xc65dD4299C682f335d6e15e2B5774D015E01E479',
    time: '1614340623'
  },
  event: 'LogCreateProposal',
  signature: '0xc10f2f4d53a0e342536c6af3cce9c6ee25c32dbb323521ce0e1d4494a3e362e8',
  raw: {
    data: '0x000000000000000000000000000000000000000000000000000000006038e20f',
    topics: [
      '0xc10f2f4d53a0e342536c6af3cce9c6ee25c32dbb323521ce0e1d4494a3e362e8',
      '0x88437e94b8ffc61e30087ba66182c8f291e4af36d289ae299f676f014fdba411',
      '0x000000000000000000000000c65dd4299c682f335d6e15e2b5774d015e01e479',
      '0x000000000000000000000000c65dd4299c682f335d6e15e2b5774d015e01e479'
    ]
  }

参考

https://www.cnblogs.com/tokenpai/p/10334952.html