Arbitrage_Q4_2022.sol

Arbitrage_Q4_2022.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.12;

interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

interface IMyRouterInterface { // UniswapV2Interface
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
}

contract Arbitrage {
    address public jumboRouter;
    address public jumboFactory;
    
    address public ashiRouter;
    address public ashiFactory;
    
    address public busd;
    address public wbnb;
    
    
    constructor () public {
        jumboRouter = address(0x10ED43C718714eb63d5aA57B78B54704E256024E); // pancake
        // jumboFactory = address(0x4fcEd72290D3337b20F214b2De6dd4974bB75Af2);
        
        ashiRouter = address(0xF6297d882e28fEDF9d39F3C02F81Ed9e3C4d9F4E); // arken
        // ashiFactory = address(0x94487959348Db362325B042f0D4c81Ff6b476050);
        
        busd = address(0xe9e7CEA3DedcA5984780Bafc599bD69ADd087D56);
        wbnb = address(0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c);
    }
    
    function execArbitrage (uint amountWBNB) public returns (uint) {
        
        uint amountBUSD = swapAtJumboRouter(amountWBNB); 
        uint amountWBNBWithProfit = swapAtAshiRouter(amountBUSD); 
       
        uint256 profit = amountWBNBWithProfit - amountWBNB; // 1.03 - 1 = 0.03 WBNB;
        
        // withdrawWBNBProfit(profit - 0.01); // 0.03 WBNB;
        
        return profit;
    } 
    
    
    function swapAtJumboRouter(uint256 amountIn) public returns(uint) {
        
        address[] memory path = new address[](2);
        
        path[0] = address(busd);
        path[1] = address(wbnb);
        
        uint amountOutMin = IMyRouterInterface(jumboRouter).getAmountsOut(
            amountIn,
            path
            )[1];
            
        IERC20(busd).approve(address(jumboRouter), amountIn);
        
        uint[] memory amountsBUSD = IMyRouterInterface(jumboRouter).swapExactTokensForTokens( // return BUSD token amount
            amountIn,
            amountOutMin,
            path,
            address(this),
            block.timestamp // now
        );
        
        return amountsBUSD[1];
    }
    
    function swapAtAshiRouter(uint256 amountIn) public returns (uint) {
        
        address[] memory path = new address[](2);
        
        path[0] = address(wbnb);
        path[1] = address(busd);
        
        uint amountOutMin = IMyRouterInterface(ashiRouter).getAmountsOut(
            amountIn,
            path
            )[1];
            
        IERC20(wbnb).approve(address(ashiRouter), amountIn);
        
        uint[] memory amountsWBNB = IMyRouterInterface(ashiRouter).swapExactTokensForTokens( // return BUSD token amount
            amountIn,
            amountOutMin,
            path,
            address(this),
            block.timestamp // now
        );
        
        return amountsWBNB[1];
        
    }
    
    function checkWBNBpriceAtJumboRouter() public view returns (uint) {
        
        uint256 amountIn = 1 ether;
        
        address[] memory path = new address[](2);
        
        path[0] = address(wbnb);
        path[1] = address(busd);
        
        uint[] memory amountOutMin = IMyRouterInterface(jumboRouter).getAmountsOut(
            amountIn,
            path
            );
            
        return amountOutMin[1];
    }
    
    function checkWBNBpriceAtAshiRouter() public view returns (uint) {
        
        uint256 amountIn = 1 ether;
        
        address[] memory path = new address[](2);
        
        path[0] = address(wbnb);
        path[1] = address(busd);
        
        uint[] memory amountOutMin = IMyRouterInterface(ashiRouter).getAmountsOut(
            amountIn,
            path
            );
            
        return amountOutMin[1];
    }
    
    function withdrawBUSDProfit(uint256 amount) public {
        IERC20(busd).transfer(msg.sender,amount);
    }
    
    function withdrawWBNBProfit(uint256 amount) public {
        IERC20(wbnb).transfer(msg.sender,amount);
    }
}