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智慧型契約執行

TxTypeSmartContractExecution 使用給定的資料執行智慧型契約。 TxTypeSmartContractExecution 僅在「to」為智慧型契約帳戶時才會被接受。

此類型的交易可以建立帳戶、轉移代幣、部署智慧型契約、執行智慧型契約，或執行上述的混合交易。

匯入 @kaiachain/viem-ext 套件以在 web3 上新增 kaia 功能

使用 createPublicClient 建立一個 publicClient，設定為透過 HTTP 傳輸 (http())，與 Kaia Kairos testnet (kairos)互動。公共用戶端用於只讀操作，例如查詢區塊鏈或讀取智慧契約狀態，不需要私鑰或簽署功能。

使用 createWalletClient 設定一個錢包用戶端，並配置 Kairos 鏈、HTTP 傳輸，以及轉換為帳戶的寄件者私密金鑰。

在 to 欄位中設定您要執行的合約位址，並設定 ABI。

使用 encodeFunctionData 函式對函式名稱和參數進行編碼

使用 prepareTransactionRequest 建立執行智慧型契約的交易請求。指定交易類型 (TxType.smartContractExecution)

將 tx 傳送至區塊鏈。函式 sendTransaction 內部會以帳戶的私密金鑰簽章，然後傳送到區塊鏈網路。

publicClient 會呼叫智慧型契約上的 number 函式，以擷取契約狀態中儲存的目前值。

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