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Write (SmartContractExecution TxType)

導入 ethers 和 @kaiachain/ethers-ext 模塊，在 ethers.js 上添加 kaia 功能。

定義發件人地址和私人密鑰

使用指定的 kairos 測試網 URL 設置提供程序。 以太坊中的提供者是訪問區塊鏈數據的只讀抽象。

此外，您還可以將提供商 URL 從 kairos 更改為 quicknode

用發件人私鑰和Web3 提供商創建錢包

設置由 solidity 代碼生成的 Abi

定義與之交互的合約地址

使用 ethers.Contract創建合約實例，填寫參數 contractAddr、abi、provider。 您可以通過該實例讀寫合約

使用方法counter.number()獲取更新前的數字值

創建事務數據以更新編號值

用上一步的數據創建一個事務對象，其類型為 SmartContractExecution

向區塊鏈發送 tx。 函數 "sendTransaction "使用賬戶的私鑰進行內部簽名，然後將其傳輸到區塊鏈網絡。

如果已在區塊鏈中完成發送，wait函數將返回發送回執。

使用方法 counter.number() 獲取更新值 number

writeTxType.js

const ethers = require("ethers");

const { Wallet, TxType } = require("@kaiachain/ethers-ext/v6");

const senderAddr = "0x24e8efd18d65bcb6b3ba15a4698c0b0d69d13ff7";

const senderPriv = "0x4a72b3d09c3d5e28e8652e0111f9c4ce252e8299aad95bb219a38eb0a3f4da49";

const provider = new ethers.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