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欢迎来到 AI 中文社区(简称 AI 中文社),这里是学习交流 AI 人工智能技术的中文社区。 为了更好的体验,本站推荐使用 Chrome 浏览器。
完整代码如下:
app.js
const Web3 = require('web3') const web3 = new Web3('https://mainnet.infura.io/v3/YOUR_INFURA_API_KEY') // YOUR_INFURA_API_KEY替换为你自己的key // OMG Token Contract const abi = [{"constant":true,"inputs":[],"name":"mintingFinished","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"unpause","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_amount","type":"uint256"}],"name":"mint","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"paused","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"finishMinting","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"pause","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_amount","type":"uint256"},{"name":"_releaseTime","type":"uint256"}],"name":"mintTimelocked","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[],"name":"MintFinished","type":"event"},{"anonymous":false,"inputs":[],"name":"Pause","type":"event"},{"anonymous":false,"inputs":[],"name":"Unpause","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"}] const address = '0xd26114cd6EE289AccF82350c8d8487fedB8A0C07' const contract = new web3.eth.Contract(abi, address) // 获取事件 contract.getPastEvents( 'AllEvents', { fromBlock: 8717848, toBlock: 'latest' }, ).then(function(events) { console.log(events) });
运行app.js:
$ node app
输出
[ { address: '0xd26114cd6EE289AccF82350c8d8487fedB8A0C07', blockHash: '0x1a1dab6709a8b634c9a5e7e24f6d232b48f82b445154f3cf6d8052bdb0550d53', blockNumber: 8717848, logIndex: 92, removed: false, transactionHash: '0x2ae9c47967eceee1eee042d3d49d89fb8994b2362969a6a7e18c92204bdf5757', transactionIndex: 106, id: 'log_b0adb365', returnValues: Result { '0': '0xB8243475CFFA57E65e739793966fBC03DA35d3aD', '1': '0x3f5CE5FBFe3E9af3971dD833D26bA9b5C936f0bE', '2': '27768634590000000000', from: '0xB8243475CFFA57E65e739793966fBC03DA35d3aD', to: '0x3f5CE5FBFe3E9af3971dD833D26bA9b5C936f0bE', value: '27768634590000000000' }, event: 'Transfer', signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef', raw: { data: '0x000000000000000000000000000000000000000000000001815e0208fa932c00', topics: [Array] } }, ... { address: '0xd26114cd6EE289AccF82350c8d8487fedB8A0C07', blockHash: '0x86b830ce21ac1d2fe88b3210bd9ca6ce8a6dc807a470d3f4cf57d17b3fe0e2bc', blockNumber: 8718031, logIndex: 178, removed: false, transactionHash: '0x76d8fdef6a7dd0099357ddf00c9c812196a98bc8bb3deab31f7f5b8dd823fc4e', transactionIndex: 187, id: 'log_e6809a37', returnValues: Result { '0': '0x0e936B11c2e7b601055e58c7E32417187aF4de4a', '1': '0x11614c5F1Eb215Ecffe657Da56d3Dd12df395dc8', '2': '115164104778191566836', from: '0x0e936B11c2e7b601055e58c7E32417187aF4de4a', to: '0x11614c5F1Eb215Ecffe657Da56d3Dd12df395dc8', value: '115164104778191566836' }, event: 'Transfer', signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef', raw: { data: '0x0000000000000000000000000000000000000000000000063e39172153f977f4', topics: [Array] } } ]
要查询最新区块号,可以使用web3.eth.getBlockNumber()函数。代码如下:app.jsconst Web3 = require('web3')const web3 = new Web3('h ...