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寫入 (SmartContractExecution TxType)

匯入 @kaiachain/ethers-ext 模組,在 web3 上加入 kaia 功能。

初始化用於與 Kaia 區塊鏈進行唯讀互動的公共用戶端。

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

設定由 solidity 代碼產生的 Abi

定義合約位址進行互動

使用 encodeFunctionData 函式對函式名稱和參數進行編碼

使用prepareTransactionRequest建立一個轉移價值的交易請求,指定寄件者帳戶、收件者地址、要轉移的價值(本範例中為 0 KLAY),以及交易類型**(TxType.SmartContractExecution)**。

使用錢包用戶端 sendTransaction 方法將交易傳送至 Kaia 區塊鏈,並記錄交易哈希值。

使用公共用戶端從合約中查詢 number 函式(一個不修改狀態的檢視函式)。 這會擷取數字變數的目前值,該值應反映前一筆交易設定的時間戳記 (如果成功的話)。

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

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