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智能合约执行

TxTypeSmartContractExecution 使用给定数据执行智能合约。 只有当 "to "是智能合约账户时,才接受TxTypeSmartContractExecution

收费代表团

导入**@kaiachain/viem-ext**软件包,在 web3 上添加 kaia 功能

初始化公共客户端,用于与 Kaia 区块链进行只读交互。

使用 createWalletClient,配置Kairos链HTTP传输和转换为账户的发送方私钥,建立发送方和付费方钱包。

在至字段中设置要执行的合同地址,并设置ABI

使用 encodeFunctionData 函数对函数名和参数进行编码

使用prepareTransactionRequest创建执行智能合约的交易请求,指定发送方账户、接收方地址、要转账的金额(本例中为 0 KLAY)和交易类型**(TxType.FeeDelegatedSmartContractDeploy)**。

使用钱包客户端的 signTransaction 方法签署交易。

发送者使用 "klay_sendRawTransaction "向 Kaia 区块链提交交易,并记录结果(通常是交易哈希值)。 汇款人支付交易费用。

准备一个费用委托事务("FeeDelegatedSmartContractExecution"),以调用合同上相同的 "setNumber "函数。 设置与非收费委托交易类似,但收费人在交易上签字,以**支付费用。

发送方首先签署交易,缴费方添加签名,然后将交易提交到 Kaia 区块链。

通过调用 number 函数(一个不修改状态的视图函数),使用公共客户端从合约中读取数字变量的值。

FeeDelegatedSmartContractExecution.js

import {
http, encodeFunctionData, createWalletClient,
createPublicClient, kairos, TxType, privateKeyToAccount
} from "@kaiachain/viem-ext";
const publicClient = createPublicClient({
chain: kairos,
transport: http(),
});
const senderWallet = createWalletClient({
chain: kairos,
transport: http(),
account: privateKeyToAccount(
"0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8"
),
})
const feePayerWallet = createWalletClient({
chain: kairos,
transport: http(),
account: privateKeyToAccount(
"0x9435261ed483b6efa3886d6ad9f64c12078a0e28d8d80715c773e16fc000cff4"
),
});
// Example usage
(async () => {
const contractAddr = "0x95Be48607498109030592C08aDC9577c7C2dD505";
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 data = encodeFunctionData({
abi,
args: [123n],
functionName: "setNumber",
});
// non fee payer
const tx = await senderWallet.prepareTransactionRequest({
type: TxType.SmartContractExecution,
account: senderWallet.account,
to: contractAddr,
value: 0,
data,
});
console.log("preparedTx", tx);
const signedTx = await senderWallet.signTransaction(tx);
const sentTx = await senderWallet.request({
method: "klay_sendRawTransaction",
params: [signedTx],
});
console.log("contract interaction tx", sentTx);
// fee payer
const tx2 = await senderWallet.prepareTransactionRequest({
type: TxType.FeeDelegatedSmartContractExecution,
account: senderWallet.account,
to: contractAddr,
value: 0,
data,
});
const signedTx2 = await senderWallet.signTransaction(tx2);
const feePayerSignedTx = await feePayerWallet.signTransactionAsFeePayer(
signedTx2
);
const sentFeePayerTx = await feePayerWallet.request({
method: "klay_sendRawTransaction",
params: [feePayerSignedTx],
});
console.log("fee payer contract execution tx", sentFeePayerTx);
const result = await publicClient.readContract({
address: contractAddr,
abi,
functionName: 'number'
})
console.log('Current contract value', result);
})();

output

❯ js FeeDelegatedSmartContractExecution.js
preparedTx {
type: 48,
account: {
address: '0xA2a8854b1802D8Cd5De631E690817c253d6a9153',
nonceManager: undefined,
sign: [AsyncFunction: sign],
signAuthorization: [AsyncFunction: signAuthorization],
signMessage: [AsyncFunction: signMessage],
signTransaction: [AsyncFunction: signTransaction],
signTypedData: [AsyncFunction: signTypedData],
source: 'privateKey',
type: 'local',
publicKey: '0x04dc9dccbd788c00fa98f7f4082f2f714e799bc0c29d63f04d48b54fe6250453cdaf06ca34ae8714cf3dae06bacdb78c7c2d4054bd38961d40853cd5f15955da79'
},
to: '0x95Be48607498109030592C08aDC9577c7C2dD505',
value: 0,
data: '0x3fb5c1cb000000000000000000000000000000000000000000000000000000000000007b',
from: '0xA2a8854b1802D8Cd5De631E690817c253d6a9153',
nonce: 2396,
chainId: 1001,
gas: 25093n,
gasPrice: '0x66720b300',
gasLimit: 62732
}
contract interaction tx 0xf92b2450cfe8bb10cdb02f01c99a391be835d94435fd042d22128233e85c8592
fee payer contract execution tx 0x910b967d4bdaa439efab64fa8d7a092d075989a477ef723d66601e694f9c5698
Current contract value 123n

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