将ERC20令牌与其他ERC20令牌交换

Question

我有两个ERC20代币。合同设计为标准ERC20。这里有两个代币作为例子-

AUDC --> Contract Address: (0xContractAUDC)
         Wallet Address:   (0xWalletAUDC)
DAI  --> Contract Address: (0xContractDAI)
         Wallet Address:   (0xWalletDAI)

我想把一些DAI从钱包0xWalletDAI转到0xWalletAUDC，作为回报，我得到了转换后的AUDC (我有两个钱包的私钥)。

寻找一些帮助，以了解如何实现这一点。如果需要的话，我会尽力提供更多的信息。

我正在使用ethers.js v4.0与区块链交互。

Answer 1

使用ether.js库的解决方案-

const ethers = require('ethers');

let provider = ethers.getDefaultProvider();

// WALLETS
const DAIUserWalletObj = new ethers.Wallet(DAIUserPrivateKey, provider);
const AUDCWalletObj = new ethers.Wallet(AUDCPrivateKey, provider);

//CONTRACTS
const contractDAI = new ethers.Contract(DAIContractAddress, DAIContractABI, provider);
constractDAI = contractDAI.connect(DAIUserWalletObj);
const contractAUDC = new ethers.Contract(AUDCContractAddress, AUDCContractABI, provider);
contractAUDC = contractAUDC.connect(AUDCWalletObj);

let overRide = { gasLimit: 7500000 }
let numDAITokens = 20;  // Just for example
let numOfAUDCTokens = 40; // Just for example
const receipt1 = await contractDAI.transfer(AUDCContractAddress, numDAITokens, overRide);
const receipt2 = await contractAUDC.transfer(DAIUserWalletAddress, numOfAUDCTokens, overRide);
console.log(receipt1);
console.log(receipt2);