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智能合約執行

TxTypeSmartContractExecution 使用給定數據執行智能合約。只有當 "to "是智能合約賬戶時，才接受TxTypeSmartContractExecution。

導入 web3 和 @kaiachain/web3js-ext 軟件包，在 web3 上添加 kaia 功能

定義發件人地址和發件人私人密鑰

定義合約地址和 Abi，可以從塊資源管理器和編譯後的 solidity 代碼中獲取

使用指定的 kairos 測試網 URL 設置提供程序。 web3js 中的提供者是訪問區塊鏈數據的只讀抽象。

此外，您還可以將提供商 URL 從 kairos 更改為 quicknode

使用提供程序創建KlaytnWeb3實例

使用web3.eth.accounts.privateKeyToAccount將發件人的私人密鑰轉換為一個賬戶

使用定義了 contractAbi 和 address 的 Web3.eth.Contract創建合同實例。您可以通過該實例讀寫合同

為 "setNumber "函數的函數數據編碼，將數據轉換為字節

Define a transaction object for the contract execution, params type: TxType.SmartContractExecution, from: senderAddr, to: contractAddr, data: data are required

用發送方的私人密鑰簽署交易

將已簽名的交易發送到區塊鏈。它將返回交易收據

SmartContractExecution.js


const { KlaytnWeb3, TxType } = require("@kaiachain/web3js-ext");
const { Web3 } = require("web3");
const senderAddr = "0xa2a8854b1802d8cd5de631e690817c253d6a9153";
const senderPriv = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";
const contractAddr = "0xD7fA6634bDDe0B2A9d491388e2fdeD0fa25D2067";
const contractAbi = [
  {
    "inputs": [
      {
        "internalType": "uint256",
        "name": "newNumber",
        "type": "uint256"
      }
    ],
    "name": "setNumber",
    "outputs": [],
    "stateMutability": "nonpayable",
    "type": "function"
  }
];
async function main() {
  const provider = new Web3.providers.HttpProvider("https://public-en-kairos.node.kaia.io");
  const web3 = new KlaytnWeb3(provider);
  const senderAccount = web3.eth.accounts.privateKeyToAccount(senderPriv);
  // https://web3js.readthedocs.io/en/v1.2.11/web3-eth-contract.html#methods-mymethod-encodeabi
  const contract = new web3.eth.Contract(contractAbi, contractAddr);
  const data = contract.methods.setNumber(0x123).encodeABI();
  const tx = {
    type: TxType.SmartContractExecution,
    from: senderAddr,
    to: contractAddr,
    data: data,
  };
  const signResult = await senderAccount.signTransaction(tx);
  console.log("rawTx", signResult.rawTransaction);
  const receipt = await web3.eth.sendSignedTransaction(signResult.rawTransaction);
  console.log("receipt", receipt);
}
main();

output


❯ node SmartContractExecution.js
signedTx 0x6e3843d8fe5ef53b4642d82357d423dfb2741a96a9a74307df2bd7caee5659f0
receipt {
  blockHash: '0x4670feb1301e6b726568e81ea084b2b1c7d281c8d989faec8522d67af0cc8870',
  blockNumber: 148742541n,
  cumulativeGasUsed: 26990n,
  effectiveGasPrice: 25000000000n,
  from: '0xa2a8854b1802d8cd5de631e690817c253d6a9153',
  gasUsed: 26990n,
  logs: [],
  logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
  status: 1n,
  to: '0xd7fa6634bdde0b2a9d491388e2fded0fa25d2067',
  transactionHash: '0x6e3843d8fe5ef53b4642d82357d423dfb2741a96a9a74307df2bd7caee5659f0',
  transactionIndex: 0n,
  type: 0n
}