write-txtype

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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创建合约实例，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

用上一步的数据创建一个事务对象，其类型为 SmartContractExecution

向区块链发送 tx。函数 "sendTransaction "使用账户的私钥进行内部签名，然后将其传输到区块链网络。

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

writeTxType.js


const ethers = require("ethers");
const { Wallet, TxType } = 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: UNLICENSED
pragma 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 data = (await counter.populateTransaction.increment()).data;
  const tx = {
    type: TxType.SmartContractExecution,
    from: senderAddr,
    to: contractAddr,
    value: 0,
    data: data,
  };
  const sentTx = await wallet.sendTransaction(tx);
  console.log("sentTx", sentTx.hash);
  const receipt = await sentTx.wait();
  console.log("receipt", receipt);
  console.log("number after", (await counter.number()).toString());
}
main();

output


❯ node writeTxType.js
number before 292
sentTx 0x2af4d70ac12b5bedd960200e1791cd06c5ea110acb196c8156837570a158452e
receipt {
  to: '0x95Be48607498109030592C08aDC9577c7C2dD505',
  from: '0x24e8eFD18D65bCb6b3Ba15a4698c0b0d69d13fF7',
  contractAddress: null,
  transactionIndex: 0,
  gasUsed: BigNumber { _hex: '0x6d6e', _isBigNumber: true },
  logsBloom: '0x00000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000001200000002',
  blockHash: '0x91742c5e371cb44f335f2e7e944d0a340bd4bc0f2004197b689020431d72cf74',
  transactionHash: '0x2af4d70ac12b5bedd960200e1791cd06c5ea110acb196c8156837570a158452e',
  logs: [
    {
      transactionIndex: 0,
      blockNumber: 148740675,
      transactionHash: '0x2af4d70ac12b5bedd960200e1791cd06c5ea110acb196c8156837570a158452e',
      address: '0x95Be48607498109030592C08aDC9577c7C2dD505',
      topics: [Array],
      data: '0x0000000000000000000000000000000000000000000000000000000000000125',
      logIndex: 0,
      blockHash: '0x91742c5e371cb44f335f2e7e944d0a340bd4bc0f2004197b689020431d72cf74'
    }
  ],
  blockNumber: 148740675,
  confirmations: 2,
  cumulativeGasUsed: BigNumber { _hex: '0x6d6e', _isBigNumber: true },
  effectiveGasPrice: BigNumber { _hex: '0x05d21dba00', _isBigNumber: true },
  status: 1,
  type: 0,
  byzantium: true
}
number after 293