// SPDX-License-Identifier: MIT
pragma solidity ^0.8.27;

/**
Das ist Krok!

Website:  https://krok.show
Telegram: https://t.me/krokshowchat
Twitter:  https://x.com/krokshow
*/

/*

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██  ██  ██   ██ ██    ██ ██  ██  
█████   ██████  ██    ██ █████   
██  ██  ██   ██ ██    ██ ██  ██  
██   ██ ██   ██  ██████  ██   ██ 

*/

/**
 * @dev Standard ERC20 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens.
 */
interface IERC20Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientBalance(
        address sender,
        uint256 balance,
        uint256 needed
    );

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC20InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC20InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     * @param allowance Amount of tokens a `spender` is allowed to operate with.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientAllowance(
        address spender,
        uint256 allowance,
        uint256 needed
    );

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC20InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC20InvalidSpender(address spender);
}

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

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

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

/**
 * @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.
 *
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

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

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

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

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

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

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

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

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

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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
    );

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);
}

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 */
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);
}

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 */
abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
    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}.
     *
     * 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 returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual 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 default value returned by this function, unless
     * it's 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 returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `value`.
     */
    function transfer(address to, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, value);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender)
        public
        view
        virtual
        returns (uint256)
    {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `value` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 value)
        public
        virtual
        returns (bool)
    {
        address owner = _msgSender();
        _approve(owner, spender, value);
        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}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `value`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `value`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 value
    ) public virtual returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, value);
        _transfer(from, to, value);
        return true;
    }

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token taxes, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _transfer(
        address from,
        address to,
        uint256 value
    ) internal {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(from, to, value);
    }

    /**
     * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
     * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
     * this function.
     *
     * Emits a {Transfer} event.
     */
    function _update(
        address from,
        address to,
        uint256 value
    ) internal virtual {
        if (from == address(0)) {
            // Overflow check required: The rest of the code assumes that totalSupply never overflows
            _totalSupply += value;
        } else {
            uint256 fromBalance = _balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                // Overflow not possible: value <= fromBalance <= totalSupply.
                _balances[from] = fromBalance - value;
            }
        }

        if (to == address(0)) {
            unchecked {
                // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
                _totalSupply -= value;
            }
        } else {
            unchecked {
                // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
                _balances[to] += value;
            }
        }

        emit Transfer(from, to, value);
    }

    /**
     * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
     * Relies on the `_update` mechanism
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _mint(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(address(0), account, value);
    }

    /**
     * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
     * Relies on the `_update` mechanism.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead
     */
    function _burn(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        _update(account, address(0), value);
    }

    /**
     * @dev Sets `value` 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.
     *
     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
     */
    function _approve(
        address owner,
        address spender,
        uint256 value
    ) internal {
        _approve(owner, spender, value, true);
    }

    /**
     * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
     *
     * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
     * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
     * `Approval` event during `transferFrom` operations.
     *
     * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
     * true using the following override:
     * ```
     * function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
     *     super._approve(owner, spender, value, true);
     * }
     * ```
     *
     * Requirements are the same as {_approve}.
     */
    function _approve(
        address owner,
        address spender,
        uint256 value,
        bool emitEvent
    ) internal virtual {
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        _allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `value`.
     *
     * Does not update the allowance value in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Does not emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 value
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(
                    spender,
                    currentAllowance,
                    value
                );
            }
            unchecked {
                _approve(owner, spender, currentAllowance - value, false);
            }
        }
    }
}

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

interface IUniswapV2Router {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function swapExactTokensForETH(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

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

contract KROK is ERC20, Ownable {
    //Wallets
    address[] internal taxWallets;

    /// MAX AMOUNT PER BUY / SELL
    uint256 internal maxAmountPerTx = MAX_SUPPLY / 50;
    /// MAX WALLET AMOUNT
    uint256 internal maxWalletAmount = MAX_SUPPLY / 50;

    /// MAX SUPPLY
    uint256 internal constant MAX_SUPPLY = 1_000_000_000 * 1e18;
    /// PERCENT_DIVISOR
    uint256 internal constant PERCENT_DIVISOR = 10_000;

    /// TAX 
    uint256 internal constant totalBuyTax = 200;
    uint256 internal constant totalSellTax = 200; 

    /// Threshold after which collected tax is sold for eth
    uint256 internal constant swapTokensAtAmount = MAX_SUPPLY / 100_000; // = 0.01%

    /// Trading flag
    bool internal trading;

    /// mapping for managing users which are excluded from taxes
    mapping(address => bool) internal isExcluded;

    /// @notice uniswapV2Router
    IUniswapV2Router internal immutable uniswapV2Router;
    /// @notice uniswapPair
    address internal immutable uniswapPair;
    /// swapping used during collected tokens are swapped for eth
    bool internal swapping;

    //// EVENTS

    event TaxWalletTransferred(
        address indexed oldTaxWallet,
        address indexed newTaxWallet
    );

    //// MODIFIER

    /**
     * @dev Throws if the sender is not the tax wallet.
     */

    modifier onlyTaxWallets() {
        require(
            addressExists(taxWallets, msg.sender),
            "Not a Tax Wallet"
        );
        _;
    }

    function addressExists(address[] memory addresses, address _address)
        internal
        pure
        returns (bool)
    {
        for (uint256 i = 0; i < addresses.length; i++) {
            if (addresses[i] == _address) {
                return true;
            }
        }
        return false;
    }

    /** @notice create an erc20, initialize all required variables
     *        like owner, uniswap v2 router, taxes values and wallets values.
     *        excludes the owner and token address from taxes and limits.
     *        mints the total supply to the owner wallet.
     */

    constructor() ERC20("KROK", "$krok") Ownable(msg.sender) {
        uniswapV2Router = IUniswapV2Router(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );

        taxWallets = [
            0x59247Ed344b4505f2Ad78Cfb4D68a97fBFf51425,
            0x1C943C236c17Fce419F60B5828BebbE986E097e2,
            0x962A99Ee3df178DDeA7f4388DC92669136803618,
            0x758F3A7E9BefAEBF425dcb87fc8bF8399cd89222
        ];

        uniswapPair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
            address(this),
            uniswapV2Router.WETH()
        );

        isExcluded[address(this)] = true;
        isExcluded[msg.sender] = true;
        isExcluded[address(0x0)] = true;

        for (uint256 i = 0; i < taxWallets.length; i++) {
            isExcluded[taxWallets[i]] = true;
        }

        trading = false;

        _mint(msg.sender, MAX_SUPPLY);
    }

    /**
     * @notice to recieve ETH from uniswapV2Router when swapping
     */

    receive() external payable {}

    /**
     * @notice Allows the marketing wallet to claim stuck ERC20 tokens
     * @dev Only the marketing wallet can call this function
     * @param token The address of the ERC20 token to claim
     * @param value The amount of tokens to claim
     * @param wallet The address to transfer the claimed tokens to
     */

    function claimStuckERC20(
        address token,
        uint256 value,
        address wallet
    ) external onlyTaxWallets {
        ERC20 ERC20Token = ERC20(token);
        bool success = ERC20Token.transfer(wallet, value);
        require(success, "ERC20 transfer failed");
    }

    /**
     * @notice Allows the marketing wallet to claim stuck ERC20 tokens
     * @dev Only the marketing wallet can call this function
     * @param wallet The address to transfer the claimed tokens to
     */

    function claimStuckEth(address wallet) external onlyTaxWallets {
        require(wallet != address(0), "Wallet must not be 0x0 address");

        uint256 balance = address(this).balance;
        require(balance > 0, "No ETH to transfer");

        payable(wallet).transfer(balance);
    }

    /**
     * @notice Enable Trading
     */

    function enableTrading() external onlyOwner {
        require(!trading, "Trading already open");

        require(address(this).balance > 0, "Needs ETH for liquidity");

        _approve(address(this), address(uniswapV2Router), MAX_SUPPLY);

        uniswapV2Router.addLiquidityETH{value: address(this).balance}(
            address(this),
            balanceOf(address(this)),
            0,
            0,
            owner(),
            block.timestamp
        );

        trading = true;
    }

    /**
     * @notice Update the Tax Wallet wallet address
     * @param newTaxWallet: The new address for the Tax wallet
     */

    function transferTaxWallet(address newTaxWallet) external onlyTaxWallets {
        require(
            newTaxWallet != address(0x0) && newTaxWallet != address(0xdead),
            "New Tax Wallet not 0x0 or 0xdead"
        );
        require(
            !addressExists(taxWallets, newTaxWallet),
            "New tax wallet already exists"
        );

        for (uint256 i = 0; i < taxWallets.length; i++) {
            if (taxWallets[i] == msg.sender) {
                taxWallets[i] = newTaxWallet;
                break;
            }
        }

        isExcluded[msg.sender] = false;
        isExcluded[newTaxWallet] = true;
        emit TaxWalletTransferred(msg.sender, newTaxWallet);
    }

    /**
     * @notice Remove buy and sell restrictions
     */
    function removeRestrictions() external onlyOwner {
        maxAmountPerTx = MAX_SUPPLY;
        maxWalletAmount = MAX_SUPPLY;
    }

    /**
     * @notice Override for _update required by Solidity
     *  Manage fees on buy/sell and maxTxAmount/MaxWalletLimit
     **/

    function _update(
        address from,
        address to,
        uint256 amount
    ) internal override {
        require(
            trading ||
                isExcluded[from] ||
                isExcluded[to] ||
                (from == address(uniswapV2Router) && to == uniswapPair) ||
                (to == address(uniswapV2Router) && from == uniswapPair),
            "Trading disabled"
        );

        if (!(isExcluded[from] || isExcluded[to]) && trading) {
            uint256 fee;
            if (to != uniswapPair) {
                require(
                    amount + balanceOf(to) <= maxWalletAmount,
                    "Max limit per wallet reached"
                );
            }
            if (from == uniswapPair) {
                require(
                    amount <= maxAmountPerTx,
                    "Max buy amount exceeded"
                );
                fee = (amount * totalBuyTax) / PERCENT_DIVISOR;
            } else if (to == uniswapPair) {
                require(
                    amount <= maxAmountPerTx,
                    "Max sell amount exceeded"
                );
                fee = (amount * totalSellTax) / PERCENT_DIVISOR;
            }

            amount = amount - fee;

            if (fee > 0) {
                super._update(from, address(this), fee);
            }
        }

        uint256 contractBalance = balanceOf(address(this));

        //Only swap into ETH when trading is happening
        bool canSwap = contractBalance >= swapTokensAtAmount &&
            from != uniswapPair &&
            !isExcluded[from] &&
            !swapping &&
            trading;

        if (canSwap) {
            swapping = true;
            swapAndDistribute(contractBalance);
            swapping = false;
        }

        super._update(from, to, amount);
    }

    /**
     * @notice The function swaps tokens for ETH, adds liquidity to the Uniswap V2 pair,
     *  and distributes fees according to the configured percentages.
     *
     * @param tokens The total amount of tokens to process for swapping and liquidity addition.
     *
     */

    function swapAndDistribute(uint256 tokens) private {
        swapForEth(tokens);
        if (address(this).balance > 0) {
            uint256 balancePayout = address(this).balance / taxWallets.length;
            for (uint256 i = 0; i < taxWallets.length; i++) {
                payable(taxWallets[i]).transfer(balancePayout);
            }
        }
    }

    /**
     * @notice Swaps the specified amount of tokens for ETH using the Uniswap V2 Router.
     *
     * @param tokens The amount of tokens to swap for ETH.
     *
     * @dev This function generates the Uniswap pair path for the token to WETH,
     * checks the allowance for the token with the Uniswap V2 Router, and then makes
     * the swap from tokens to ETH. It ensures that the swap supports fees on transfer tokens
     * and sets a deadline for the swap transaction.
     */
    function swapForEth(uint256 tokens) private {
        // generate the Uniswap pair path of token -> WETH

        address contractAddress = address(this); 

        address[] memory path = new address[](2);
        path[0] = contractAddress;
        path[1] = uniswapV2Router.WETH();

        if (allowance(contractAddress, address(uniswapV2Router)) < tokens) {
            _approve(
                contractAddress,
                address(uniswapV2Router),
                type(uint256).max
            );
        }

        // make the swap
        uniswapV2Router.swapExactTokensForETH(
            tokens,
            0,
            path,
            contractAddress,
            block.timestamp
        );
    }
}

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