DeFiVulnLabs靶场全系列详解（三十六）没有设置滑点保护，允许最小代币接收数量为0，导致代币价值遭受损失

interfaceIUniswapV2Router02{function  swapExactTokensForTokens(        uint256 amountIn,  //输入代币数量（用户卖出数量        uint256 amountOutMin,  //用户希望输出的代币数量        address[] calldata path, //交易路径，例如weth到usdc        address to, // 接受代币的地址        uint256 deadline // 截止交易时间    )externalreturns(uint256[] memory amounts);}//实际返回的交易数量interfaceIWETH{function   deposit()externalpayable;function   approve(address guy, uint256 wad)externalreturns(bool);function   withdraw(uint256 wad)external;}//设置一个uniswap地址池，交易币种为IWETH和USDTcontract ContractTest is Test {    address UNISWAP_ROUTER = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D; // Uniswap Router address on Ethereum Mainnet    IWETH WETH = IWETH(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);    address USDT = 0xdAC17F958D2ee523a2206206994597C13D831ec7;//它创建了一个以太坊主网的分叉，从区块号17568400开始function  setUp()public{        vm.createSelectFork("mainnet", 17568400);    }functiont  estswapTokensWithMaxDeadline()externalpayable{        WETH.approve(address(UNISWAP_ROUTER), type(uint256).max);        WETH.deposit{value: 1 ether}();        uint256 amountIn = 1 ether;        //定义了最小接收数量，这里设置为0        uint256 amountOutMin = 0;//uint256 amountOutMin = 1867363899; //1867363899 INSUFFICIENT_OUTPUT_AMOUNT// Path for swapping ETH to USDT        address[] memory path = new address[](2);        path[0] = address(WETH); // WETH (Wrapped Ether)        path[1] = USDT; // USDT (Tether)// No Effective Expiration Deadline// The function sets the deadline to the maximum uint256 value, which means the transaction can be executed at any time,// possibly under unfavorable market conditions.        IUniswapV2Router02(UNISWAP_ROUTER).swapExactTokensForTokens(            amountIn,            amountOutMin,            path,            address(this),            type(uint256).max // Setting deadline to max value        );        console.log("USDT", IERC20(USDT).balanceOf(address(this)));    }    receive() external payable {}}

uint256 amountOutMin = amountIn * 99 / 100; 

uint256 amountOutMin = amountIn * 995 / 1000;