Sepolia测试网Uniswap V3做市机器人CALL_EXCEPTION问题求助

从James Bachini的GitHub仓库获取的做市机器人在ETH主网运行正常，但部署到Sepolia测试网时触发CALL_EXCEPTION错误，以下是适配Sepolia后的代码及报错信息，请求排查解决。

适配Sepolia测试网后的代码 #

const ethers = require('ethers');
require("dotenv").config();

const wethAddress = '0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14'; // Sepolia WETH
const routerAddress = '0x0227628f3F023bb0B980b67D528571c95c6DaC1c'; // Uniswap Router Sepolia
const quoterAddress = '0xEd1f6473345F45b75F8179591dd5bA1888cf2FB3'; // Uniswap Quoter Sepolia
const tokenAddress = '0x1f9840a85d5af5bf1d1762f925bdaddc4201f984'; // UNI Sepolia token

const fee = 3000; // Uniswap pool fee bps 500, 3000, 10000
const buyAmount = ethers.parseUnits('0.001', 'ether');
const targetPrice = BigInt(16); // target exchange rate
const targetAmountOut = buyAmount * targetPrice;
const sellAmount = buyAmount / targetPrice;
const tradeFrequency = 3600 * 1000; // ms (once per hour)

const provider = new ethers.JsonRpcProvider(`https://eth-sepolia.g.alchemy.com/v2/${process.env.ALCHEMY_API_KEY}`);

provider.getBlockNumber().then(blockNumber => {
  console.log('Connected to Sepolia network. Current block number:', blockNumber);
}).catch(error => {
  console.error('Failed to connect to Sepolia network:', error);
});

const wallet = new ethers.Wallet(process.env.PRIVATE_KEY);
const account = wallet.connect(provider);

const token = new ethers.Contract(
  tokenAddress,
  [
    'function approve(address spender, uint256 amount) external returns (bool)',
    'function allowance(address owner, address spender) public view returns (uint256)',
  ],
  account
);

const router = new ethers.Contract(
  routerAddress,
  ['function exactInputSingle((address tokenIn, address tokenOut, uint24 fee, address recipient, uint256 deadline, uint256 amountIn, uint256 amountOutMinimum, uint160 sqrtPriceLimitX96)) external payable returns (uint256 amountOut)'],
  account
);

const quoter = new ethers.Contract(
  quoterAddress,
  ['function quoteExactInputSingle(address tokenIn, address tokenOut, uint24 fee, uint256 amountIn, uint160 sqrtPriceLimitX96) public view returns (uint256 amountOut)'],
  account
);

const buyTokens = async () => {
  console.log('Buying Tokens')
  const deadline = Math.floor(Date.now() / 1000) + 600;
  const tx = await router.exactInputSingle([wethAddress, tokenAddress, fee, wallet.address, deadline, buyAmount, 0, 0], {value: buyAmount});
  await tx.wait();
  console.log(tx.hash);
}

报错信息 #

Error: missing revert data (action="call", data=null, reason=null, transaction={ "data": "0xf7729d43000000000000000000000000fff9976782d46cc05630d1f6ebab18b2324d6b140000000000000000000000001f9840a85d5af5bf1d1762f925bdaddc4201f9840000000000000000000000000000000000000000000000000000000000000bb800000000000000000000000000000000000000000000000000038d7ea4c680000000000000000000000000000000000000000000000000000000000000000000", "from": ... })

排查与解决步骤 #

• 修正结构体参数传递方式：Uniswap V3 Router的exactInputSingle方法接受结构体参数，ethers.js中需传递对象而非数组，数组形式会导致参数解析错误触发CALL_EXCEPTION。修改buyTokens函数中的调用代码：

  const tx = await router.exactInputSingle({
    tokenIn: wethAddress,
    tokenOut: tokenAddress,
    fee: fee,
    recipient: wallet.address,
    deadline: deadline,
    amountIn: buyAmount,
    amountOutMinimum: 0,
    sqrtPriceLimitX96: 0
  }, {value: buyAmount});
  

• 确认合约地址有效性：已验证你使用的Sepolia测试网合约地址均为正确地址
• 检查钱包余额：确保钱包持有足够Sepolia ETH，用于支付0.001 ETH交易金额及gas费用
• 启用调试日志：添加调试代码获取更多交易细节：

  provider.on('debug', (info) => {
    if (info.action === 'call' || info.action === 'sendTransaction') {
      console.log('Debug info:', info);
    }
  });
  

• 模拟交易验证：使用Sepolia区块浏览器或Tenderly模拟交易，查看具体revert原因（如流动性不足、参数错误等）

内容的提问来源于stack exchange，提问作者Valerio