flashboyz_v2.sol

pragma solidity ^0.8.0;

/** DESCRIPTION

    pragma solidity ^0.8.0;: Specifies the Solidity compiler version.

    import "./IERC20.sol";: Importing the ERC20 interface.

    import "./IUniswapV2Router02.sol";: Importing the Uniswap V2 Router interface.

    address private owner;: Private variable to store the contract owner's address.

    IUniswapV2Router02 private uniswapRouter;: Private variable to store the Uniswap Router instance.

    constructor(address _routerAddress) { ... }: Constructor function that initializes the contract owner and the Uniswap Router.

    modifier onlyOwner() { ... }: Modifier that restricts access to only the contract owner.

    function flashLoan(address token, uint256 amount, address dex1, address dex2) external onlyOwner { ... }: Function to perform a flash loan between two DEXs. It takes the token address, loan amount, and addresses of the two DEXs as parameters.

    Inside the flashLoan function, there are comments explaining each step of the flash loan process:
        Getting the token from DEX1.
        Performing arbitrage logic.
        Swapping tokens on DEX2 using the Uniswap Router.
        Repaying the flash loan on DEX1.

Please note that the IERC20 and IUniswapV2Router02 interfaces are assumed to be defined in separate Solidity files and imported into this contract.
**/

import "./IERC20.sol";
import "./IUniswapV2Router02.sol";

// Contract for Flash Loan Protocol
contract FlashLoanProtocol {
    address private owner; // Address of the contract owner
    IUniswapV2Router02 private uniswapRouter; // Instance of Uniswap Router

    // Constructor
    constructor(address _routerAddress) {
        owner = msg.sender; // Set the contract owner
        uniswapRouter = IUniswapV2Router02(_routerAddress); // Initialize the Uniswap Router
    }

    // Modifier to restrict access to only the contract owner
    modifier onlyOwner() {
        require(msg.sender == owner, "Only owner can call this function");
        _;
    }

    // Function to perform a flash loan between two DEXs
    function flashLoan(
        address token, // Address of the token
        uint256 amount, // Amount of the flash loan
        address dex1, // Address of the first DEX
        address dex2 // Address of the second DEX
    ) external onlyOwner {
        // Get token from DEX1
        IERC20(token).transferFrom(dex1, address(this), amount);

        // Perform arbitrage logic here
        // ...

        // Swap tokens on DEX2
        address[] memory path = new address[](2);
        path[0] = token;
        path[1] = uniswapRouter.WETH();

        IERC20(token).approve(address(uniswapRouter), amount);
        uniswapRouter.swapExactTokensForETH(
            amount,
            0,
            path,
            address(this),
            block.timestamp + 1800
        );

        // Repay flash loan on DEX1
        IERC20(token).transfer(dex1, amount);
    }
}