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取消

TxTypeCancel 取消事務池中具有相同 nonce 的事務的執行。 當已提交的交易在一定時間內似乎未得到處理時，這種交易類型就很有用。

導入 web3 和 @kaiachain/web3js-ext 軟件包，在 web3 上添加 kaia 功能

定義發件人地址和發件人私人密鑰

使用指定的 kairos 測試網 URL 設置提供程序。 web3js 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

使用提供程序創建KlaytnWeb3實例

使用web3.eth.accounts.privateKeyToAccount將發件人的私人密鑰轉換為一個賬戶

Define a transaction object for the Cancel transaction, params type: TxType.Cancel and from: senderAddr are required

用發送人的賬戶簽署交易

將已簽名的交易發送到區塊鏈，並打印收據

TxCancelType.js

const { KlaytnWeb3, TxType } = require("@kaiachain/web3js-ext");

const { Web3 } = require("web3");

const senderAddr = "0xa2a8854b1802d8cd5de631e690817c253d6a9153";

const senderPriv = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";

async function main() {

const provider = new Web3.providers.HttpProvider("https://public-en-kairos.node.kaia.io");

const web3 = new KlaytnWeb3(provider);

const senderAccount = web3.eth.accounts.privateKeyToAccount(senderPriv);

const tx = {

type: TxType.Cancel,

from: senderAddr,

};

const signResult = await senderAccount.signTransaction(tx);

console.log("rawTx", signResult.rawTransaction);

const receipt = await web3.eth.sendSignedTransaction(signResult.rawTransaction);

console.log("receipt", receipt);

}

main();

output

❯ js TxCancelType.js

signedTx 0xe9a22708a547b5db4b1787603bdeed4b530b83ca2ba277dffba265061e675896

receipt {

blockHash: '0x8d3772ae12e4ef79b22631a10d02b2b731e3b099327fd58367e3374639aed4ca',

blockNumber: 148742706n,

cumulativeGasUsed: 21000n,

effectiveGasPrice: 25000000000n,

from: '0xa2a8854b1802d8cd5de631e690817c253d6a9153',

gasUsed: 21000n,

logs: [],

logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',

status: 1n,

to: '0xa2a8854b1802d8cd5de631e690817c253d6a9153',

transactionHash: '0xe9a22708a547b5db4b1787603bdeed4b530b83ca2ba277dffba265061e675896',

transactionIndex: 0n,

type: 0n

}