如何在 nodejs 中使用這個合約？謝謝

我得到了這個似乎滿足我需要的契約，但我不知道如何從 nodejs 撥打電話，你能幫我嗎？謝謝

// SPDX-License-Identifier: MIT
pragma solidity ^0.8;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract Rewards is Ownable {
   IERC20 public rewardsToken;

   mapping(address => uint) public rewards;

   constructor(address _rewardsToken) {
       rewardsToken = IERC20(_rewardsToken);
   }

   function setReward(address account,uint256 amount)  public onlyOwner  {
       rewards[account] = amount;
   }

   function claimReward() public{
       uint256 reward = rewards[msg.sender];
       rewards[msg.sender] = 0;
       rewardsToken.transfer(msg.sender, reward*10**18);
   }
}

您將使用諸如web3js或ethers之類的庫與它們進行互動。

正如鍊接一樣，這兩個都提供了一些很好的入門步驟，但您也可以在網上找到很多教程：

• https://trufflesuite.com/tutorial/
• https://ethereum.org/en/developers/tutorials/

編輯：

範例ethers：

import { ethers } from "ethers";

// See https://docs.ethers.io/v5/api/providers/
const jsonRpc = "some json rpc (e.g. infura)"
const provider = new new ethers.providers.JsonRpcProvider(jsonRpc)
// See https://docs.ethers.io/v5/api/signer/#Wallet
const privateKey = "some private key"
const wallet = new ethers.Wallet(privateKey, provider)

// Manually define abi for the simplicity of the exmaple
// Solidity also creates a abi definition when compiling the contract that can be used.
const rewardsAbi = [
 "function setReward(address account,uint256 amount) public",
 "function claimReward() public",
]

const rewardsAddress = "0x<some_address>"
// Use signer here as we want to change the state
// See https://docs.ethers.io/v5/getting-started/#getting-started--writing
const rewardsContract = new ethers.Contract(rewardsAddress, rewardsAbi, wallet);

const tx = await rewardsContract.claimReward()
// Wait for the tx to be mined
const receipt = await tx.wait()

引用自：https://ethereum.stackexchange.com/questions/119914