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)

Cancel

TxTypeCancel 取消事务池中具有相同 nonce 的事务的执行。 当已提交的交易在一定时间内似乎未得到处理时，这种交易类型就很有用。

导入 web3 和 @kaiachain/web3js-ext 软件包，在 web3 上添加 kaia 功能

定义发件人、缴费人地址，以及他们的（私钥）（

使用指定的 kairos 测试网 URL 设置提供程序。 web3 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

使用提供程序创建 "KlaytnWeb3 "实例

使用 privateKeyToAccount 将发件人的私人密钥转换为一个账户

使用参数定义一个 FeeDelegatedCancel 事务：类型TxType.FeeDelegatedCancel, from: senderAddr`.

用发送方账户签署交易

将缴费人的私人密钥转换为账户

作为付费者签署交易

发送已签名的交易并记录收据

TxFeeDelegatedCancel.js

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

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

const senderAddr = "0xa2a8854b1802d8cd5de631e690817c253d6a9153";

const senderPriv = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";

const feePayerAddr = "0xcb0eb737dfda52756495a5e08a9b37aab3b271da";

const feePayerPriv = "0x9435261ed483b6efa3886d6ad9f64c12078a0e28d8d80715c773e16fc000cff4";

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.FeeDelegatedCancel,

from: senderAddr,

};

const signResult1 = await senderAccount.signTransaction(tx);

console.log("senderRawTx", signResult1.rawTransaction);

console.log("senderTx", parseTransaction(signResult1.rawTransaction));

// Next step is usually done in the backend by the service provider.

// But for the sake of demonstration, feePayer signature is done here.

const feePayerAccount = web3.eth.accounts.privateKeyToAccount(feePayerPriv);

const signResult2 = await feePayerAccount.signTransactionAsFeePayer(signResult1.rawTransaction);

console.log("rawTx", signResult2.rawTransaction);

console.log("tx", parseTransaction(signResult2.rawTransaction));

const receipt = await web3.eth.sendSignedTransaction(signResult2.rawTransaction);

console.log("receipt", receipt);

}

main();

output

❯ js TxFeeDelegatedCancel.js

senderTxHashRLP 0x39f86b8203ba850ba43b74008302059494a2a8854b1802d8cd5de631e690817c253d6a9153f847f8458207f6a00a348d88278e74688124d4cd3996eed20fba6d5b3e10203d2d52395aab8abfbca031a4213782de0ccaed08a5b08e8e1294e2c8e85f4d758688f96c3e58373c3fed

signedTx 0x8b7fa96dd12a54c077020ddbfdb4114254312bfdbb361cf9479610afe1ba381c

receipt {

blockHash: '0xbb38361be83e6af540b71875824e05a8be986209c0c083eafee07ca35e811334',

blockNumber: 148744957n,

cumulativeGasUsed: 179526n,

effectiveGasPrice: 25000000000n,

from: '0xa2a8854b1802d8cd5de631e690817c253d6a9153',

gasUsed: 31000n,

logs: [],

logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',

status: 1n,

to: '0xa2a8854b1802d8cd5de631e690817c253d6a9153',

transactionHash: '0x8b7fa96dd12a54c077020ddbfdb4114254312bfdbb361cf9479610afe1ba381c',

transactionIndex: 1n,

type: 0n

}