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写入（智能合约执行 TxType）

导入 @kaiachain/ethers-ext 模块，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建立钱包客户端，配置Kairos链、HTTP传输和转换为账户的发送者私钥。

设置从 solidity 代码生成的 Abi

定义与之交互的**合同地址

使用 encodeFunctionData 函数对函数名和参数进行编码

使用 prepareTransactionRequest创建转账交易请求，指定发送方账户、接收方地址、转账金额（本例中为 0 KLAY）和交易类型**（TxType.SmartContractExecution）**。

使用钱包客户端的 sendTransaction 方法将交易发送到 Kaia 区块链，并记录交易哈希值。

使用公共客户端从合约中查询 number 函数（一个不修改状态的视图函数）。这将检索数字变量的当前值，该值应反映上一个事务（如果成功）所设置的时间戳。

writeTxType.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"
    ),
});
// 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: [Date.now()],
        functionName: "setNumber",
    });
    const tx = await senderWallet.prepareTransactionRequest({
        type: TxType.SmartContractExecution,
        account: senderWallet.account,
        to: contractAddr,
        value: 0,
        data,
    });
    console.log("preparedTx", tx);
    const sentTx = await senderWallet.sendTransaction(tx);
    console.log("contract interaction tx", sentTx);
    const result = await publicClient.readContract({
        address: contractAddr,
        abi,
        functionName: 'number'
    })
    console.log('Current contract value', result);
})();

output


❯ node writeTxType.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: '0x3fb5c1cb000000000000000000000000000000000000000000000000000001977cfdd996',
  from: '0xA2a8854b1802D8Cd5De631E690817c253d6a9153',
  nonce: 2399,
  chainId: 1001,
  gas: 27953n,
  gasPrice: '0x66720b300',
  gasLimit: 69882
}
contract interaction tx 0x1834bf6fb6fe30bbf1799b03db6dd5448b0bb445e503f38496845b995f909baa
Current contract value 1750147159253n