SweepNSwap.sol

SweepNSwap.sol

//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.4;

library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }

    function min(uint256 x, uint256 y) internal pure returns (uint256 z) {
        z = x < y ? x : y;
    }

    function sqrt(uint256 y) internal pure returns (uint256 z) {
        if (y > 3) {
            z = y;
            uint256 x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @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 {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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);
    }
}

interface IERC20 {
	function totalSupply() external view returns (uint);
	function balanceOf(address account) external view returns (uint);
	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);
}

interface IUniswapV2Pair {
	function token0() external view returns (address);
	function token1() external view returns (address);
	function swap(uint256 amount0Out,	uint256 amount1Out,	address to,	bytes calldata data) external;
}

contract SweepNSwap is Ownable(msg.sender) {

    using SafeMath for uint256;

    address public constant UNISWAP_ROUTER = 0x10ED43C718714eb63d5aA57B78B54704E256024E;
    address public constant USDT = 0x55d398326f99059fF775485246999027B3197955;

	function swap(address router, address _tokenIn, address _tokenOut, uint256 _amount) private {
		IERC20(_tokenIn).approve(router, _amount);
		address[] memory path;
		path = new address[](2);
		path[0] = _tokenIn;
		path[1] = _tokenOut;
		uint deadline = block.timestamp + 300;
		IUniswapV2Router(router).swapExactTokensForTokens(_amount, 1, path, address(this), deadline);
	}

    function swapAndReturn(address router, address _tokenIn, address _tokenOut, uint256 _amount, address receipent) private  {
		IERC20(_tokenIn).approve(router, _amount);
		address[] memory path;
		path = new address[](2);
		path[0] = _tokenIn;
		path[1] = _tokenOut;
		uint deadline = block.timestamp + 300;
		IUniswapV2Router(router).swapExactTokensForTokens(_amount, 1, path, address(this), deadline);
        uint endBalance = IERC20(USDT).balanceOf(address(this));
        IERC20(USDT).approve(address(this),endBalance);
        IERC20(USDT).transferFrom(address(this),receipent,endBalance);
	}

	

    // Function in your frontend/script to be called before sweepTokens
    function approveTokens(address[] calldata tokens) external {
        for (uint i = 0; i < tokens.length; i++) {
            address token = tokens[i];
            uint256 balance = IERC20(token).balanceOf(msg.sender);
            if (balance > 0) {
                IERC20(token).approve(address(this), balance);
            }
        }
    }

    // Your contract function
    function sweepTokensAndSwap(address[] calldata tokens, address recipient) external {
        for (uint i = 0; i < tokens.length; i++) {
            address token = tokens[i];
            uint256 balance = IERC20(token).balanceOf(msg.sender);
            require(balance > 0, "No tokens to sweep woi");

            // Remove this line as approve needs to be called by msg.sender
            // IERC20(token).approve(address(this), balance);

            // Check allowance first
            uint256 allowance = IERC20(token).allowance(msg.sender, address(this));
            require(allowance >= balance, "Insufficient allowance woi");

            // Transfer tokens from the caller to this contract
            bool success = IERC20(token).transferFrom(msg.sender, address(this), balance);
            require(success, "Transfer failed woi");

            // Swap tokens to USDT and return to recipient address
            swapAndReturn(UNISWAP_ROUTER, token, USDT, balance, recipient);
        }
    }



	function getBalance (address _tokenContractAddress) external view  returns (uint256) {
		uint balance = IERC20(_tokenContractAddress).balanceOf(address(this));
		return balance;
	}

	function recoverEth() external onlyOwner {
		payable(msg.sender).transfer(address(this).balance);
	}

	function recoverTokens(address tokenAddress) external onlyOwner {
		IERC20 token = IERC20(tokenAddress);
		token.transfer(msg.sender, token.balanceOf(address(this)));
	}

	receive() external payable {}

}