如何交换基础链（Eth Layer2）

Question

Stack Overflow 社区您好，

我正在使用 Uniswap V3 和 ethers.js 在基础 Layer2 网络中交换代币。我已经使用approve函数成功批准了交易，但是当我尝试使用exactInputSingle执行交换时，我遇到了“警告！在合约执行期间遇到错误[执行恢复]”错误。

这是我的代码的简化版本：

import { getPoolImmutables, getPoolState } from './utils';
const { ethers } = require('ethers');
const { abi: IUniswapV3PoolABI } = require('@uniswap/v3-core/artifacts/contracts/interfaces/IUniswapV3Pool.sol/IUniswapV3Pool.json');
const SwapRouterABI = require('./routerabi.json');
const ERC20ABI = require('./abi.json');

const QUICKNODE_HTTP_ENDPOINT = 'https://sepolia.base.org';
const WALLET_ADDRESS = '';
const WALLET_SECRET = '';

const provider = new ethers.providers.JsonRpcProvider(QUICKNODE_HTTP_ENDPOINT);
const poolAddress = '0x7516D071921973fDFf29C071f42d21C227CF5740'; 
const swapRouterAddress = '0x050E797f3625EC8785265e1d9BDd4799b97528A1';

async function main() {
  const poolContract = new ethers.Contract(poolAddress, IUniswapV3PoolABI, provider);
  const immutables = await getPoolImmutables(poolContract);
  const state = await getPoolState(poolContract);

  const wallet = new ethers.Wallet(WALLET_SECRET);
  const connectedWallet = wallet.connect(provider);

  const swapRouterContract = new ethers.Contract(swapRouterAddress, SwapRouterABI, provider);
  const inputAmount = 0.09;
  const amountIn = ethers.utils.parseUnits(inputAmount.toString(), 18);
  const approvalAmount = (amountIn * 10).toString();
  const tokenContract0 = new ethers.Contract(immutables.token1, ERC20ABI, provider);

  const approvalResponse = await tokenContract0
    .connect(connectedWallet)
    .approve(swapRouterAddress, approvalAmount);

  const params = {
    tokenIn: immutables.token1,
    tokenOut: immutables.token0,
    fee: immutables.fee,
    recipient: WALLET_ADDRESS,
    deadline: Math.floor(Date.now() / 1000) + 60 * 10,
    amountIn: '0x013fbe85edc90000',
    amountOutMinimum: 0,
    sqrtPriceLimitX96: 0,
    nounce: await connectedWallet.getTransactionCount(),
  };

  const transaction = swapRouterContract
    .connect(connectedWallet)
    .exactInputSingle(params, {
      gasLimit: ethers.utils.hexlify(1000000),
      gasPrice: ethers.utils.parseUnits('10', 'gwei'),
    })
    .then((transaction: any) => {
      console.log(transaction);
    });
}

main();

我怀疑我可能需要使用执行函数，但我不确定如何做到这一点或者这是否是正确的方法。

任何有关如何使用 ethers.js 在基础 Layer2 网络上的 Uniswap V3 池中正确执行交换的任何指导将不胜感激。

谢谢！

Answer 1

这是

params

结构

struct ExactInputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 deadline;
        uint256 amountIn;
        uint256 amountOutMinimum;
        uint160 sqrtPriceLimitX96;
    }

没有

nonce

（您输入了 nounce）。

另外

amountIn

请输入我们

uint256

。你已经正确定义了

  const amountIn = ethers.utils.parseUnits(inputAmount.toString(), 18);

但是在函数调用中你正在传递

amountIn: '0x013fbe85edc90000',

应该是

  amountIn: amountIn