// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: @openzeppelin/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// File: contracts/ArbitrageBot.sol



//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/access/Ownable.sol";

interface IERC20 {
	function totalSupply() external view returns (uint);
	function balanceOf(address account) external view returns (uint);
	function decimals() external view returns (uint8);
	function transfer(address recipient, uint amount) external returns (bool);
	function allowance(address owner, address spender) external view returns (uint);
	function approve(address spender, uint amount) external returns (bool);
	function transferFrom(address sender, address recipient, uint amount) external returns (bool);
	event Transfer(address indexed from, address indexed to, uint value);
	event Approval(address indexed owner, address indexed spender, uint value);
}

interface IUniswapV2Router {
  function getAmountsOut(uint256 amountIn, address[] memory path) external view returns (uint256[] memory amounts);
  function swapExactTokensForTokens(uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) external returns (uint256[] memory amounts);
}

contract ArbitrageBot is Ownable {

	function getAmountOut(address router, address tokenIn, address tokenOut, uint256 amountIn) public view returns (uint256) {
		address[] memory path;
		path = new address[](2);
		path[0] = tokenIn;
		path[1] = tokenOut;
		uint256[] memory amountOutMins = IUniswapV2Router(router).getAmountsOut(amountIn, path);
		return amountOutMins[path.length -1];
	}

  function estimateTrade(address router1, address router2, address baseToken, address targetToken, uint256 amountIn) external view returns (uint256) {
		uint256 amountOut1 = getAmountOut(router1, baseToken, targetToken, amountIn);
		uint256 amountOut2 = getAmountOut(router2, targetToken, baseToken, amountOut1);
		return amountOut2;
	}
	
	function swap(address router, address tokenIn, address tokenOut, uint256 amountIn) public {
		IERC20(tokenIn).approve(router, amountIn);
		address[] memory path;
		path = new address[](2);
		path[0] = tokenIn;
		path[1] = tokenOut;
		uint256 deadline = block.timestamp + 300;
		IUniswapV2Router(router).swapExactTokensForTokens(amountIn, 1, path, address(this), deadline);
	}

  function trade(address router1, address router2, address baseToken, address targetToken, uint256 amountIn) external onlyOwner returns (uint256) {
    uint256 startBaseTokenBalance = IERC20(baseToken).balanceOf(address(this));
    uint256 startTargetTokenBalance = IERC20(targetToken).balanceOf(address(this));
    swap(router1, baseToken, targetToken, amountIn);
    uint256 targetTokenBalance = IERC20(targetToken).balanceOf(address(this));
    uint256 tradeableTargetTokenAmount = targetTokenBalance - startTargetTokenBalance;
    swap(router2, targetToken, baseToken, tradeableTargetTokenAmount);
    uint256 endBaseTokenBalance = IERC20(baseToken).balanceOf(address(this));
    require(endBaseTokenBalance > startBaseTokenBalance, "Trade reverted");
		return amountIn + endBaseTokenBalance - startBaseTokenBalance;
  }

	function withdrawEth() external onlyOwner {
		payable(msg.sender).transfer(address(this).balance);
	}

	function withdrawToken(address tokenAddress) external onlyOwner {
		IERC20 token = IERC20(tokenAddress);
		token.transfer(msg.sender, token.balanceOf(address(this)));
	}

}