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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。

这种类型的交易可以创建账户、转移代币、部署智能合约、执行智能合约，或执行上述交易的组合。

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

使用createPublicClient创建一个publicClient，配置为通过HTTP传输（http()）与Kaia Kairos testnet（kairos）交互。公共客户端用于只读操作，如查询区块链或读取智能合约状态，无需私钥或签名功能。

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。

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为执行智能合约创建交易请求。指定交易类型**（TxType.smartContractExecution）**

向区块链发送 tx。函数 "sendTransaction "使用账户的私钥进行内部签名，然后将其传输到区块链网络。

publicClient 调用智能合约上的number函数，该函数会检索存储在合约状态中的当前值。

smartContractExecution.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 smartContractExecution.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: '0x3fb5c1cb000000000000000000000000000000000000000000000000000001977b9b017d',
  from: '0xA2a8854b1802D8Cd5De631E690817c253d6a9153',
  nonce: 2384,
  chainId: 1001,
  gas: 27953n,
  gasPrice: '0x66720b300',
  gasLimit: 69882
}
contract interaction tx 0x50d708b08ae4de72e9e52212eb48ec317032c2d7d06620b615d819ecdf004e8f
Current contract value 1750125336184n