本页面使用机器翻译自英语,可能包含错误或不清楚的语言。如需最准确的信息,请参阅英文原文。由于更新频繁,部分内容可能与英文原文有出入。请加入我们在 Crowdin 上的努力,帮助我们改进本页面的翻译。 (Crowdin translation page, Contributing guide)
Write
当您需要更新合约中的某些状态时,可以与智能合约进行**"事务 "**交互。
导入 ethers 和 @kaiachain/ethers-ext 模块,在 ethers.js 上添加 kaia 功能。
定义发件人地址和私人密钥
使用指定的 kairos 测试网 URL 设置提供程序。 以太坊中的提供者是访问区块链数据的只读抽象。
此外,您还可以将提供商 URL 从 kairos 更改为 quicknode 。
用发件人私钥和Web3 提供商创建钱包
设置由 solidity 代码生成的 Abi
定义与之交互的合约地址
使用 ethers.Contract创建合同实例,填写参数 contractAddr、abi、provider。 您可以通过该实例读写合约
使用方法counter.number()获取更新前的数字值
创建事务数据以更新编号值
如果已在区块链中完成发送,wait函数将返回发送回执。
使用方法 counter.number() 获取更新值 number
smartContractWrite.js
const ethers = require("ethers");const { Wallet } = require("@kaiachain/ethers-ext");const senderAddr = "0x24e8efd18d65bcb6b3ba15a4698c0b0d69d13ff7";const senderPriv = "0x4a72b3d09c3d5e28e8652e0111f9c4ce252e8299aad95bb219a38eb0a3f4da49";const provider = new ethers.providers.JsonRpcProvider("https://public-en-kairos.node.kaia.io");const wallet = new Wallet(senderPriv, provider);/* compiled in remix.ethereum.org (compiler: 0.8.18, optimizer: false)// SPDX-License-Identifier: UNLICENSEDpragma solidity ^0.8.13;contract Counter { uint256 public number; event SetNumber(uint256 number); constructor(uint256 initNumber) { number = initNumber; } function setNumber(uint256 newNumber) public { number = newNumber; emit SetNumber(number); } function increment() public { number++; emit SetNumber(number); }}*/const abi = '[{"inputs":[{"internalType":"uint256","name":"initNumber","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"number","type":"uint256"}],"name":"SetNumber","type":"event"},{"inputs":[],"name":"increment","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"number","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"newNumber","type":"uint256"}],"name":"setNumber","outputs":[],"stateMutability":"nonpayable","type":"function"}]';const contractAddr = "0x95Be48607498109030592C08aDC9577c7C2dD505";async function main() { const counter = new ethers.Contract(contractAddr, abi, wallet); console.log("number before", (await counter.number()).toString()); const sentTx = await counter.increment(); const receipt = await sentTx.wait(); console.log("receipt", receipt); console.log("number after", (await counter.number()).toString());}main();
output
❯ node smartContractWrite.jsnumber before 291receipt { to: '0x95Be48607498109030592C08aDC9577c7C2dD505', from: '0x24e8eFD18D65bCb6b3Ba15a4698c0b0d69d13fF7', contractAddress: null, transactionIndex: 0, gasUsed: BigNumber { _hex: '0x6d6e', _isBigNumber: true }, logsBloom: '0x00000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000001200000002', blockHash: '0xbc6486ec825cf2388917f6c5c250af3f811bc838ea3f83382c1786d31b1eaaac', transactionHash: '0x07c87084001218f66e260cb63c207c676eae3bb4a338b7384457f6a4fdebd5da', logs: [ { transactionIndex: 0, blockNumber: 148740640, transactionHash: '0x07c87084001218f66e260cb63c207c676eae3bb4a338b7384457f6a4fdebd5da', address: '0x95Be48607498109030592C08aDC9577c7C2dD505', topics: [Array], data: '0x0000000000000000000000000000000000000000000000000000000000000124', logIndex: 0, blockHash: '0xbc6486ec825cf2388917f6c5c250af3f811bc838ea3f83382c1786d31b1eaaac' } ], blockNumber: 148740640, confirmations: 1, cumulativeGasUsed: BigNumber { _hex: '0x6d6e', _isBigNumber: true }, effectiveGasPrice: BigNumber { _hex: '0x05d21dba00', _isBigNumber: true }, status: 1, type: 2, byzantium: true, events: [ { transactionIndex: 0, blockNumber: 148740640, transactionHash: '0x07c87084001218f66e260cb63c207c676eae3bb4a338b7384457f6a4fdebd5da', address: '0x95Be48607498109030592C08aDC9577c7C2dD505', topics: [Array], data: '0x0000000000000000000000000000000000000000000000000000000000000124', logIndex: 0, blockHash: '0xbc6486ec825cf2388917f6c5c250af3f811bc838ea3f83382c1786d31b1eaaac', args: [Array], decode: [Function (anonymous)], event: 'SetNumber', eventSignature: 'SetNumber(uint256)', removeListener: [Function (anonymous)], getBlock: [Function (anonymous)], getTransaction: [Function (anonymous)], getTransactionReceipt: [Function (anonymous)] } ]}number after 292