/**
 * SPDX-License-Identifier: MIT
 */
pragma solidity >=0.8.19;

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;
        }
    }
}

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 IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - amount);
        }

        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

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 Returns the address of the current owner.
     */
    function owner() public view virtual 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 {
        _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);
    }
}

interface IUniswapV2Factory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint256
    );

    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(uint256) external view returns (address pair);

    function allPairsLength() external view returns (uint256);

    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;
}

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;
}

contract Kaiji is ERC20, Ownable {
    using SafeMath for uint256;

    IUniswapV2Router02 public immutable uniswapV2Router;
    address public immutable uniswapV2Pair;
    address public constant deadAddress = address(0xdead);

    // Swapback
    bool private swapping;
    bool public swapEnabled = false;
    uint256 public minSwapbackLimit;
    uint256 public maxSwapbackLimit;

    //Anti-whale
    bool public limitsInEffect = true;
    uint256 public maxWallet;
    uint256 public maxTransactionAmount;
    mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch

    // Blacklist
    bool public blacklistEnabled = true;
    mapping(address => bool) public blacklist;

    // Fee receivers
    address public lpWAddress;
    address public mktWAddress;
    address public teamWAddress;


    bool public publicTradingOpen = false;

    uint256 public feesOnBuys;
    uint256 public mktWalletFeeOnBuy;
    uint256 public autoLPFeeOnBuy;
    uint256 public teamWalletFeeOnBuy;

    uint256 public feesOnSells;
    uint256 public mktWalletFeeOnSell;
    uint256 public autoLPFeeOnSell;
    uint256 public teamWalletFeeOnSell;

    uint256 public contractBalanceForMktWAddress;
    uint256 public contractBalanceForAutoLiquidity;
    uint256 public contractBalanceForTeamWallet;

    /******************/

    // exlcude from fees and max transaction amount
    mapping(address => bool) private feeExemptAddress;
    mapping(address => bool) public txLimitExemptAddress;

    // store addresses that a automatic market maker pairs. Any transfer *to* these addresses
    // could be subject to a maximum transfer amount
    mapping(address => bool) public dexPairs;

    event UpdateUniswapV2Router(
        address indexed newAddress,
        address indexed oldAddress
    );

    event ExcludeFromFees(address indexed account, bool isExcluded);

    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);

    event mktWAddressUpdated(
        address indexed newWallet,
        address indexed oldWallet
    );

    event teamWAddressUpdated(
        address indexed newWallet,
        address indexed oldWallet
    );

    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiquidity
    );

    constructor() ERC20("Kaiji", "KAIJI") {
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );

        setTxLimitExemptAddress(address(_uniswapV2Router), true);
        uniswapV2Router = _uniswapV2Router;

        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());
        setTxLimitExemptAddress(address(uniswapV2Pair), true);
        _setDexPairs(address(uniswapV2Pair), true);

        uint256 _mktWalletFeeOnBuy = 1;
        uint256 _autoLPFeeOnBuy = 1;
        uint256 _teamWalletFeeOnBuy = 1;

        uint256 _mktWalletFeeOnSell = 1;
        uint256 _autoLPFeeOnSell = 1;
        uint256 _teamWalletFeeOnSell = 1;

        uint256 totalSupply = 100000000000 * 1e18;

        maxTransactionAmount = (totalSupply * 20) / 1000; // 2% of total supply
        maxWallet = (totalSupply * 20) / 1000; // 2% of total supply

        minSwapbackLimit = (totalSupply * 5) / 10000; // 0.05% swapback trigger
        maxSwapbackLimit = (totalSupply * 1) / 100; // 1% max swapback

        mktWalletFeeOnBuy = _mktWalletFeeOnBuy;
        autoLPFeeOnBuy = _autoLPFeeOnBuy;
        teamWalletFeeOnBuy = _teamWalletFeeOnBuy;
        feesOnBuys = mktWalletFeeOnBuy + autoLPFeeOnBuy + teamWalletFeeOnBuy;

        mktWalletFeeOnSell = _mktWalletFeeOnSell;
        autoLPFeeOnSell = _autoLPFeeOnSell;
        teamWalletFeeOnSell = _teamWalletFeeOnSell;
        feesOnSells = mktWalletFeeOnSell + autoLPFeeOnSell + teamWalletFeeOnSell;

        mktWAddress = address(msg.sender); 
        teamWAddress = address(msg.sender);
        lpWAddress = msg.sender;

        // exclude from paying fees or having max transaction amount
        setFeeExemptAddress(owner(), true);
        setFeeExemptAddress(address(this), true);
        setFeeExemptAddress(address(0xdead), true);
        setFeeExemptAddress(mktWAddress, true);

        setTxLimitExemptAddress(owner(), true);
        setTxLimitExemptAddress(address(this), true);
        setTxLimitExemptAddress(address(0xdead), true);
        setTxLimitExemptAddress(mktWAddress, true);

        /*
            _mint is an internal function in ERC20.sol that is only called here,
            and CANNOT be called ever again
        */
        _mint(msg.sender, totalSupply);
    }

    receive() external payable {}

    /// @dev Launches the token and enables trading. Irriversable.
    function openToPublic() external onlyOwner {
        publicTradingOpen = true;
        swapEnabled = true;
    }

    /// @dev Removes the max wallet and max transaction limits
    function rmvTxAndWalletLimits() external onlyOwner returns (bool) {
        limitsInEffect = false;
        return true;
    }

    /// @dev Changes the minimum balance of tokens the contract must have before swapping tokens for ETH. Base 100000, so 0.5% = 500.
    /// @param newAmount The new amount, in base 100000. Maximum 500 for 0.5%. Cant be higher than maxSwapbackLimit
    function updateMinSwapbackLimit(uint256 newAmount)
        external
        onlyOwner
        returns (bool)
    {
        require(
            newAmount >= totalSupply()/ 100000,
            "Swap amount cannot be lower than 0.001% total supply."
        );
        require(
            newAmount <= 500 * totalSupply()/ 100000,
            "Swap amount cannot be higher than 0.5% total supply."
        );
        require(
             (newAmount * totalSupply()/ 100000) <= maxSwapbackLimit,
            "Swap amount cannot be higher than maxSwapbackLimit"
        );
        minSwapbackLimit = newAmount * totalSupply()/ 100000;
        return true;
    }

    /// @dev Changes the maximum amount of tokens the contract can swap for ETH. Base 10000, so 0.5% = 50.
    /// @param newAmount The new amount, in base 10000. Cant be lower than minSwapbackLimit
    function updateMaxSwapbackLimit(uint256 newAmount)
        external
        onlyOwner
        returns (bool)
    {
        require(
            (newAmount * totalSupply()/ 10000) >= minSwapbackLimit,
            "Swap amount cannot be lower than minSwapbackLimit"
        );
        maxSwapbackLimit =   (newAmount * totalSupply()/ 10000);
        return true;
    }

    /// @dev Changes the maximum amount of tokens that can be bought or sold in a single transaction
    /// @param newNum Base 1000, so 1% = 10. Minimum of 2 for 0.2%
    function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
        require(
            newNum >= 2,
            "Cannot set maxTransactionAmount lower than 0.2%"
        );
        maxTransactionAmount = newNum * totalSupply()/ 1000;
    }

    /// @dev Changes the maximum amount of tokens a wallet can hold
    /// @param newNum Base 1000, so 1% = 10. Minimum of 5 for 0.5%
    function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
        require(
            newNum >= 5,
            "Cannot set maxWallet lower than 0.5%"
        );
        maxWallet = newNum * totalSupply()/1000;
    }


    /// @dev Sets if a wallet is excluded from the max wallet and tx limits
    /// @param updAds The wallet to update
    /// @param isEx If the wallet is excluded or not
    function setTxLimitExemptAddress(address updAds, bool isEx)
        public
        onlyOwner
    {
        txLimitExemptAddress[updAds] = isEx;
    }

    /// @dev Sets if the contract can sell tokens
    /// @param enabled set to false to disable selling
    function setSwapEnabled(bool enabled) external onlyOwner {
        swapEnabled = enabled;
    }
    
    /// @dev Sets the fees for buys
    /// @param _marketing The fee for the marketing wallet
    /// @param _liquidity The fee for the liquidity pool
    /// @param _team The fee for the dev wallet
    function setFeesOnBuys(
        uint256 _marketing,
        uint256 _liquidity,
        uint256 _team
    ) external onlyOwner {
        mktWalletFeeOnBuy = _marketing;
        autoLPFeeOnBuy = _liquidity;
        teamWalletFeeOnBuy = _team;
        feesOnBuys = mktWalletFeeOnBuy + autoLPFeeOnBuy + teamWalletFeeOnBuy;
    }

    /// @dev Sets the fees for sells
    /// @param _marketingFee The fee for the marketing wallet
    /// @param _liquidityFee The fee for the liquidity pool
    /// @param _devFee The fee for the dev wallet
    function setFeesOnSells(
        uint256 _marketingFee,
        uint256 _liquidityFee,
        uint256 _devFee
    ) external onlyOwner {
        mktWalletFeeOnSell = _marketingFee;
        autoLPFeeOnSell = _liquidityFee;
        teamWalletFeeOnSell = _devFee;
        feesOnSells = mktWalletFeeOnSell + autoLPFeeOnSell + teamWalletFeeOnSell;
    }

    /// @dev Sets if a wallet is excluded from fees
    /// @param account The wallet to update
    /// @param excluded If the wallet is excluded or not
    function setFeeExemptAddress(address account, bool excluded) public onlyOwner {
        feeExemptAddress[account] = excluded;
        emit ExcludeFromFees(account, excluded);
    }

    /// @dev Sets an address as a new liquidity pair. You probably dont want to do this.
    /// @param pair The new pair
    function setDexPairs(address pair, bool value)
        public
        onlyOwner
    {
        require(
            pair != uniswapV2Pair,
            "The pair cannot be removed from dexPairs"
        );

        _setDexPairs(pair, value);
    }

    function _setDexPairs(address pair, bool value) private {
        dexPairs[pair] = value;

        emit SetAutomatedMarketMakerPair(pair, value);
    }

    function updateMktWAddress(address newMktWAddress)
        external
        onlyOwner
    {
        emit mktWAddressUpdated(newMktWAddress, mktWAddress);
        mktWAddress = newMktWAddress;
    }

    function updateLpWAddress(address newLpWAddress)
        external
        onlyOwner
    {
        lpWAddress = newLpWAddress;
    }

    function updateTeamWalletAddress(address newWallet) external onlyOwner {
        emit teamWAddressUpdated(newWallet, teamWAddress);
        teamWAddress = newWallet;
    }

    function isFeeExemptAddress(address account) public view returns (bool) {
        return feeExemptAddress[account];
    }
    
    /// @dev Sets if multiple addresses are blacklisted or not
    /// @param accounts The wallets to update
    /// @param isBlacklisted If the wallets are blacklisted or not
    function setBlacklist(address[] memory accounts, bool isBlacklisted)
        external
        onlyOwner
    {
        for (uint256 i = 0; i < accounts.length; i++) {
            blacklist[accounts[i]] = isBlacklisted;
        }
    }

    /// @dev Sets if the blacklist is in effect
    /// @param enabled If the blacklist should be checked or not
    function setBlacklistEnabled(bool enabled) external onlyOwner {
        blacklistEnabled = enabled;
    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal override {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }

        if (limitsInEffect) {
            if (
                from != owner() &&
                to != owner() &&
                to != address(0) &&
                to != address(0xdead) &&
                !swapping
            ) {
                if (!publicTradingOpen) {
                    require(
                        feeExemptAddress[from] || feeExemptAddress[to],
                        "Trading is not active."
                    );
                }

                //when buy
                if (
                    dexPairs[from] &&
                    !txLimitExemptAddress[to]
                ) {
                    require(
                        amount <= maxTransactionAmount,
                        "Buy transfer amount exceeds the maxTransactionAmount."
                    );
                    require(
                        amount + balanceOf(to) <= maxWallet,
                        "Max wallet exceeded"
                    );
                }
                //when sell
                else if (
                    dexPairs[to] &&
                    !txLimitExemptAddress[from]
                ) {
                    require(
                        amount <= maxTransactionAmount,
                        "Sell transfer amount exceeds the maxTransactionAmount."
                    );
                } else if (!txLimitExemptAddress[to]) {
                    require(
                        amount + balanceOf(to) <= maxWallet,
                        "Max wallet exceeded"
                    );
                }
            }
        }

        uint256 contractTokenBalance = balanceOf(address(this));

        bool canSwap = contractTokenBalance >= minSwapbackLimit;

        if (
            canSwap &&
            swapEnabled &&
            !swapping &&
            !dexPairs[from] &&
            !feeExemptAddress[from] &&
            !feeExemptAddress[to]
        ) {
            swapping = true;

            swapBack();

            swapping = false;
        }

        bool takeFee = !swapping;

        // if any account belongs to _isExcludedFromFee account then remove the fee
        if (feeExemptAddress[from] || feeExemptAddress[to]) {
            takeFee = false;
        }

        if (!feeExemptAddress[from] || !feeExemptAddress[to]) {
            require(!blacklist[from], "Address is blacklisted");
        }

        uint256 fees = 0;
        // only take fees on buys/sells, do not take on wallet transfers
        if (takeFee) {
            // on sell
            if (dexPairs[to] && feesOnSells > 0) {
                fees = amount.mul(feesOnSells).div(100);
                contractBalanceForAutoLiquidity += (fees * autoLPFeeOnSell) / feesOnSells;
                contractBalanceForTeamWallet += (fees * teamWalletFeeOnSell) / feesOnSells;
                contractBalanceForMktWAddress += (fees * mktWalletFeeOnSell) / feesOnSells;
            }
            // on buy
            else if (dexPairs[from] && feesOnBuys > 0) {
                fees = amount.mul(feesOnBuys).div(100);
                contractBalanceForAutoLiquidity += (fees * autoLPFeeOnBuy) / feesOnBuys;
                contractBalanceForTeamWallet += (fees * teamWalletFeeOnBuy) / feesOnBuys;
                contractBalanceForMktWAddress += (fees * mktWalletFeeOnBuy) / feesOnBuys;
            }

            if (fees > 0) {
                super._transfer(from, address(this), fees);
            }

            amount -= fees;
        }

        super._transfer(from, to, amount);
    }

    function swapTokensForEth(uint256 tokenAmount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();

        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // make the swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // add the liquidity
        uniswapV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            lpWAddress,
            block.timestamp
        );
    }

    function swapBack() private {
        uint256 contractBalance = balanceOf(address(this));
        uint256 totalTokensToSwap = contractBalanceForAutoLiquidity +
            contractBalanceForMktWAddress +
            contractBalanceForTeamWallet;
        bool success;

        if (contractBalance == 0 || totalTokensToSwap == 0) {
            return;
        }

        if (contractBalance > maxSwapbackLimit) {
            contractBalance = maxSwapbackLimit;
        }

        // Halve the amount of liquidity tokens
        uint256 liquidityTokens = (contractBalance * contractBalanceForAutoLiquidity) /
            totalTokensToSwap /
            2;
        uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);

        uint256 initialETHBalance = address(this).balance;

        swapTokensForEth(amountToSwapForETH);

        uint256 ethBalance = address(this).balance.sub(initialETHBalance);

        uint256 ethForMarketing = ethBalance.mul(contractBalanceForMktWAddress).div(
            totalTokensToSwap
        );
        uint256 ethForDev = ethBalance.mul(contractBalanceForTeamWallet).div(totalTokensToSwap);

        uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;

        contractBalanceForAutoLiquidity = 0;
        contractBalanceForMktWAddress = 0;
        contractBalanceForTeamWallet = 0;

        (success, ) = address(teamWAddress).call{value: ethForDev}("");

        if (liquidityTokens > 0 && ethForLiquidity > 0) {
            addLiquidity(liquidityTokens, ethForLiquidity);
            emit SwapAndLiquify(
                amountToSwapForETH,
                ethForLiquidity,
                contractBalanceForAutoLiquidity
            );
        }

        (success, ) = address(mktWAddress).call{
            value: address(this).balance
        }("");
    }

}