Solidity uniswap flashloan boat

solidity

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";

contract FlashLoanBot {
    address constant UNISWAP_ROUTER_ADDRESS = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    address constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
    address constant USDC_ADDRESS = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48;
    address constant USDT_ADDRESS = 0xdAC17F958D2ee523a2206206994597C13D831ec7;
    uint constant AMOUNT_IN = 1 ether;
    uint constant AMOUNT_OUT_MIN = 1;
    uint constant DEADLINE = block.timestamp + 1200; // 20 minutes from now

    IUniswapV2Router02 public router;

    constructor() {
        router = IUniswapV2Router02(UNISWAP_ROUTER_ADDRESS);
    }

    function startFlashLoan() external {
        // Define the tokens and amounts for the flashloan trade
        address[] memory path = new address[](2);
        path[0] = DAI_ADDRESS;
        path[1] = USDT_ADDRESS;

        // Execute the flashloan trade on Uniswap
        router.swapExactTokensForTokens(
            AMOUNT_IN,
            AMOUNT_OUT_MIN,
            path,
            address(this),
            DEADLINE
        );
        
        // Implement your custom logic here
        // ...
        
        // Return the borrowed tokens to the lending pool
        IERC20(DAI_ADDRESS).transfer(UNISWAP_ROUTER_ADDRESS, AMOUNT_IN);
    }
}