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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 ethers 和 @kaiachain/ethers-ext 模塊，在 ethers.js 上添加 kaia 功能。

定義發件人地址和發件人私人密鑰

使用指定的 kairos 測試網 URL 設置提供程序。以太坊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

使用發件人的私人密鑰和提供商創建發件人錢包

在至字段中設置要執行的合約地址，並設置ABI

使用 ethers.Contract創建合約實例，填寫參數 contractAddr、abi、provider。您可以通過該實例讀寫合約

使用 encodeFunctionData 函數對函數名和參數進行編碼

定義交易對象

向區塊鏈發送 tx。函數 "sendTransaction "使用賬戶的私鑰進行內部簽名，然後將其傳輸到區塊鏈網絡。

如果已在區塊鏈中完成發送，wait函數將返回發送回執。

smartContractExecution.js


const ethers = require("ethers");
const { Wallet, TxType } = require("@kaiachain/ethers-ext/v6");
const senderAddr = "0xa2a8854b1802d8cd5de631e690817c253d6a9153";
const senderPriv = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";
const provider = new ethers.JsonRpcProvider("https://public-en-kairos.node.kaia.io");
const wallet = new Wallet(senderPriv, provider);
const contractAddr = "0x95Be48607498109030592C08aDC9577c7C2dD505";
const abi = ["function setNumber(uint256 newNumber)"];
async function main() {
  const contract = new ethers.Contract(contractAddr, abi, provider);
  const data = contract.interface.encodeFunctionData("setNumber", ["0x123"]);
  const tx = {
    type: TxType.SmartContractExecution,
    from: senderAddr,
    to: contractAddr,
    value: 0,
    data: data,
  };
  const sentTx = await wallet.sendTransaction(tx);
  console.log("sentTx", sentTx.hash);
  const receipt = await sentTx.wait();
  console.log("receipt", receipt);
}
main();

output


❯ node smartContractExecution.js
sentTx 0x6ee58de9d1fd46da6f595112cc6ce060ef560796f78650e8a18fb32f20ec5343
receipt {
  to: '0x95Be48607498109030592C08aDC9577c7C2dD505',
  from: '0xA2a8854b1802D8Cd5De631E690817c253d6a9153',
  contractAddress: null,
  transactionIndex: 3,
  gasUsed: BigNumber { _hex: '0x6f49', _isBigNumber: true },
  logsBloom: '0x00000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000001200000002',
  blockHash: '0xb71bcb74a6772501913302fb30d754bdf82cf2996ba9418b509bfd48b275bb0c',
  transactionHash: '0x6ee58de9d1fd46da6f595112cc6ce060ef560796f78650e8a18fb32f20ec5343',
  logs: [
    {
      transactionIndex: 3,
      blockNumber: 148721006,
      transactionHash: '0x6ee58de9d1fd46da6f595112cc6ce060ef560796f78650e8a18fb32f20ec5343',
      address: '0x95Be48607498109030592C08aDC9577c7C2dD505',
      topics: [Array],
      data: '0x0000000000000000000000000000000000000000000000000000000000000123',
      logIndex: 9,
      blockHash: '0xb71bcb74a6772501913302fb30d754bdf82cf2996ba9418b509bfd48b275bb0c'
    }
  ],
  blockNumber: 148721006,
  confirmations: 2,
  cumulativeGasUsed: BigNumber { _hex: '0x094000', _isBigNumber: true },
  effectiveGasPrice: BigNumber { _hex: '0x05d21dba00', _isBigNumber: true },
  status: 1,
  type: 0,
  byzantium: true
}