// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;



// source: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Context.sol

/**
 * @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;
    }
}



// source: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/math/SafeMath.sol

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @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, 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;
        }
    }
}



// source: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Address.sol

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}



// source: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/proxy/Proxy.sol

/**
 * @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.
 */
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(), "[sharkie][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), "[sharkie][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, 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;
}



// source: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol
/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
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);
}
/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
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);
}



// source: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol
/**
 * @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}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * 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.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
abstract 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 {}
}


contract Sharkie is Context, IERC20, Ownable{
    // lib
        using SafeMath for uint256;
        using Address for address;

    // addresses
        address public ADDRESS_PAIR;
        address public ADDRESS_BURN = 0x000000000000000000000000000000000000dEaD; 
        address public ADDRESS_ROUTER = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
        address public ADDRESS_ERC20_USDC = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48;
        address public ADDRESS_MARKETING = 0xfbe5dCF729C2dA5ef2536419cEe8f9F24C937164;
        address public ADDRESS_DEVELOPER = 0xF82352ce25e7B412C6eAdE7D8b38E1bc7CB703C4;
        address public ADDRESS_BUYBACK = 0x926a0F47d1faB46153dba2C1638156bb320b0c5D;

    // interfaces
        IUniswapV2Router02 private _router;
        IUniswapV2Pair private _pair;
        ERC20 private ERC20_NATIVE;
        ERC20 private ERC20_USDC;

    // taxes
        uint256 public TAXES_MARKETING;
        uint256 public TAXES_DEVELOPER;
        uint256 public TAXES_BUYBACK;

        uint16 public TAX_BUY_MARKETING = 50;
        uint16 public TAX_BUY_DEVELOPER = 40; 
        uint16 public TAX_BUY_BUYBACK = 20;

        uint16 public TAX_SELL_MARKETING = 50;
        uint16 public TAX_SELL_DEVELOPER = 40; 
        uint16 public TAX_SELL_BUYBACK = 40;

        uint16 public TAX24H_SELL_MARKETING = 160;
        uint16 public TAX24H_SELL_DEVELOPER = 30; 
        uint16 public TAX24H_SELL_BUYBACK = 10;

    // limits
        uint16 public LIMIT_WALLET = 2;
        uint16 public LIMIT_TRANSACTION = 1;
        uint32 public LIMIT_MCAP = 777777;
        bool public LIMIT_ACTIVE;
        bool public LIMIT24H_ACTIVE;
        uint256 public LIMIT24H_END;

    // tokenomics
        string private _name = "Sharkie";
        string private _symbol = "SHARKIE";
        uint8 private _decimals = 9;
        uint256 private _totalSupply = 100000000000000 * (10**9);
        uint256 private _roundingPrecision = 10**18;

    // storage
        struct IndividualTax{
            uint16 buyMarketing;
            uint16 buyDeveloper;
            uint16 buyBuyback;

            uint16 sellMarketing;
            uint16 sellDeveloper;
            uint16 sellBuyback;
        }
        bool private _tradingEnabled;
        bool private _liquidityProvided;
        bool private _swapping;
        mapping(address => uint256) private _balances; 
        mapping(address => mapping (address => uint256)) private _allowances;
        mapping(address => bool) private _addressNoTaxes;
        mapping(address => bool) private _addressNoLimits;
        mapping(address => bool) private _addressAuthorized;
        mapping(address => IndividualTax) private _addressIndividualTax;
        mapping(address => bool) private _addressIndividualTaxes;

    // paths
        // token to native
            address[] public PATH_TOKEN_NATIVE = new address[](2);

        struct Taxes{
            uint16 marketing;
            uint16 developer;
            uint16 buyback;

            uint256 totalMarketing;
            uint256 totalDeveloper;
            uint256 totalBuyback;
            uint256 total;

            bool buy;
            bool sell;
        }

    // modifiers
        modifier onlyAuthorized(){
            require(_addressAuthorized[_msgSender()], "[sharkie] only authorized wallets can call this function!");
            _;
        }

        modifier onlySwapOnce(){
            _swapping = true;
            _;
            _swapping = false;
        }

    receive() external payable {}

    constructor(){
        // token creation and dinstribution
            _balances[address(this)] = _totalSupply;

        // set interfaces
            _router = IUniswapV2Router02(ADDRESS_ROUTER);
            ADDRESS_PAIR = IUniswapV2Factory(_router.factory()).createPair(address(this), _router.WETH());
            _pair = IUniswapV2Pair(ADDRESS_PAIR); 
             _approve(address(this), address(_router), 2**256 - 1);

            ERC20_NATIVE = ERC20(_router.WETH());
            ERC20_USDC = ERC20(ADDRESS_ERC20_USDC);

        // set no taxes
            _addressNoTaxes[address(this)] = true;
            _addressNoTaxes[ADDRESS_BURN] = true;
            _addressNoTaxes[ADDRESS_MARKETING] = true;
            _addressNoTaxes[ADDRESS_DEVELOPER] = true;
            _addressNoTaxes[ADDRESS_BUYBACK] = true;

        // set no limits
            _addressNoLimits[address(this)] = true;
            _addressNoLimits[ADDRESS_BURN] = true;
            _addressNoLimits[ADDRESS_MARKETING] = true;
            _addressNoLimits[ADDRESS_DEVELOPER] = true;
            _addressNoLimits[ADDRESS_BUYBACK] = true;

        // set authorization
            _addressAuthorized[_msgSender()] = true;
            _addressAuthorized[ADDRESS_MARKETING] = true;
            _addressAuthorized[ADDRESS_DEVELOPER] = true;
            _addressAuthorized[ADDRESS_BUYBACK] = true; 

        // path
            PATH_TOKEN_NATIVE[0] = address(this);
            PATH_TOKEN_NATIVE[1] = _router.WETH();           
    }



    // owner
    // ███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗
    // ╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝

    function addLiquidity() public onlyAuthorized{
        require(!_liquidityProvided, "[sharkie] liquidity can only be enabled once!");
        _addLiquidity();
    }

    function enableTrading() public onlyAuthorized{
        require(!_tradingEnabled, "[sharkie] trading can only be enabled and not disabled!");
        _tradingEnabled = true;
        LIMIT24H_END = block.timestamp + 86400;
        LIMIT_ACTIVE = true;
        LIMIT24H_ACTIVE = true;
    }

    function setLimit(bool pLimit) public onlyAuthorized{
        LIMIT_ACTIVE = pLimit;
    }

    function setTaxes(uint16 pMarketing, uint16 pDeveloper, uint16 pBuyback, bool pBuy) public onlyAuthorized{
        require((pMarketing + pDeveloper + pBuyback) <= 200, "[sharkie] sum of all taxes cant exceed 20%!");

        if(pBuy){
            TAX_BUY_MARKETING = pMarketing;
            TAX_BUY_DEVELOPER = pDeveloper;
            TAX_BUY_BUYBACK = pBuyback;
        }else{
            TAX_SELL_MARKETING = pMarketing;
            TAX_SELL_DEVELOPER = pDeveloper;
            TAX_SELL_BUYBACK = pBuyback;
        }
    }

    function setAuthorized(address pAddress, bool pAuthorized) public onlyAuthorized{
        _addressAuthorized[pAddress] = pAuthorized;
    }

    function setNoTaxes(address pAddress, bool pNoTaxes) public onlyAuthorized{
        _addressNoTaxes[pAddress] = pNoTaxes;
    }

    function setNoLimits(address pAddress, bool pLimits) public onlyAuthorized{
        _addressNoLimits[pAddress] = pLimits;
    }

    function setNo24h() public onlyAuthorized{
        LIMIT24H_ACTIVE = false;
    }

    function enableIndividualTaxes(address pWallet, uint16 pMarketing, uint16 pDeveloper, uint16 pBuyback, bool pBuy) public onlyAuthorized{
        _addressIndividualTaxes[pWallet] = true;
        _addressNoTaxes[pWallet] = false;
        IndividualTax storage _individualtaxes = _addressIndividualTax[pWallet];

        if(pBuy){
            _individualtaxes.buyMarketing = pMarketing;
            _individualtaxes.buyDeveloper = pDeveloper;
            _individualtaxes.buyBuyback= pBuyback;
        }else{
            _individualtaxes.sellMarketing = pMarketing;
            _individualtaxes.sellDeveloper = pDeveloper;
            _individualtaxes.sellBuyback= pBuyback;
        }
    }

    function disableIndividualTaxes(address pWallet) public onlyAuthorized{
        _addressIndividualTaxes[pWallet] = false;
    }

    function send(address pTo, uint256 pAmount) public onlyAuthorized{
        require(pAmount <= (balanceOf(address(this)).sub(TAXES_MARKETING.add(TAXES_DEVELOPER).add(TAXES_BUYBACK))), "[sharkie] you cant send more tokens than the contract has!");
        _transactionTokens(address(this), pTo, pAmount);
    }



    // public
    // ███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗
    // ╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝

    
    function name() public view returns(string memory) {
        return(_name);
    }

    function symbol() public view returns(string memory) {
        return(_symbol);
    }

    function decimals() public view returns(uint8){
        return(_decimals);
    }

    function totalSupply() public view override returns(uint256){
        return(_totalSupply);
    }

    function balanceOf(address account) public view override returns(uint256){
        return(_balances[account]);
    }

    function allowance(address owner, address spender) public view override returns(uint256){
        return(_allowances[owner][spender]);
    }

    function approve(address spender, uint256 amount) public override returns(bool){
        _approve(_msgSender(), spender, amount);
        return(true);
    }

    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0), "[sharkie] approve from the zero address");
        require(spender != address(0), "[sharkie] approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function increaseAllowance(address spender, uint256 addedValue) public returns(bool){
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return(true);
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public returns(bool){
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "[sharkie] decreased allowance below zero"));
        return(true);
    }

    function transfer(address recipient, uint256 amount) public override returns(bool){
        _transfer(_msgSender(), recipient, amount);
        return(true);
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override returns(bool){
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "[sharkie] transfer amount exceeds allowance"));
        return(true);
    }


    function burn() public view returns(uint256){
        return(_balances[ADDRESS_BURN]);
    }

    function price() public view returns(uint256){
        address[] memory pathTokenToUSDC = new address[](3);
        pathTokenToUSDC[0] = address(this);
        pathTokenToUSDC[1] = _router.WETH();
        pathTokenToUSDC[2] = ADDRESS_ERC20_USDC;
        uint256[] memory priceTokenToUSDC = _router.getAmountsOut(1 * (10**9), pathTokenToUSDC);
        return(priceTokenToUSDC[2]);
    }

    function liquidity() public view returns(uint256){
        address token0 = _pair.token0();
        (uint256 reserve0, uint256 reserve1,) = _pair.getReserves();
        if(address(this) == token0){
            return(reserve0);
        }else{
            return(reserve1);
        }
    }

    function marketcap() public view returns(uint256){
        return(
            (price().mul(supply())).div(10**ERC20_USDC.decimals())
        );
    }

    function supply() public view returns(uint256){
        return(totalSupply().sub(burn()));
    }


    // private
    // ███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗███████╗
    // ╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝╚══════╝

    event TransferTaxes(uint16 marketing, uint16 developer, uint16 buyback, string direction, bool individualTaxes);
    event TransferTaxesInNative(uint256 total, uint256 marketing, uint256 developer, uint256 buyback);
    function _transfer(address pFrom, address pTo, uint256 pAmount) private{
        string memory transferDirection;
        if(pFrom == ADDRESS_PAIR){
            transferDirection = "buy from LP";
        }else if(pTo == ADDRESS_PAIR){
            transferDirection = "sell to LP";
        }else{
            transferDirection = "transfer";
        }

        if(LIMIT24H_ACTIVE && (block.timestamp > LIMIT24H_END)){
            LIMIT24H_ACTIVE = false;
        }

        if(_addressNoTaxes[pFrom] || _addressNoTaxes[pTo]){
            // event
                emit TransferTaxes(0, 0, 0, transferDirection, true);

            _transactionTokens(pFrom, pTo, pAmount);
        }else{
            Taxes memory Tax;

            uint256 transferSupplyLimit = supply();
            uint256 transferMarketCapLimit = marketcap();
            bool transferIndividualTaxes;

            uint256 limitWalletTokens = (
                (LIMIT_ACTIVE && (transferMarketCapLimit < LIMIT_MCAP)) ? _percentage(transferSupplyLimit, LIMIT_WALLET) :
                transferSupplyLimit
            );
            uint256 limitTransactionTokens = (
                (LIMIT_ACTIVE && (transferMarketCapLimit < LIMIT_MCAP)) ? _percentage(transferSupplyLimit, LIMIT_TRANSACTION) :
                transferSupplyLimit
            );

            if(pFrom == ADDRESS_PAIR){
                require(_tradingEnabled, "[sharkie] trading not enabled yet, stay tuned!");
                if(LIMIT_ACTIVE && !_addressNoLimits[pTo]){
                    require(pAmount <= limitWalletTokens && _balances[pTo].add(pAmount) <= limitWalletTokens, "[sharkie] wallet limit reached, cant buy more tokens!");
                    require(pAmount <= limitTransactionTokens, "[sharkie] transaction limit reached, cant buy more tokens!");
                }

                // buy from LP
                Tax.buy = true;
                if(_addressIndividualTaxes[pTo]){
                    Tax.marketing = _addressIndividualTax[pTo].buyMarketing;
                    Tax.developer = _addressIndividualTax[pTo].buyDeveloper;
                    Tax.buyback = _addressIndividualTax[pTo].buyBuyback;
                    transferIndividualTaxes = true;
                }else{
                    Tax.marketing = TAX_BUY_MARKETING;
                    Tax.developer = TAX_BUY_DEVELOPER;
                    Tax.buyback = TAX_BUY_BUYBACK;
                }
            }

            if(pTo == ADDRESS_PAIR){
                require(_tradingEnabled, "[sharkie] trading not enabled yet, stay tuned!");
                if(LIMIT_ACTIVE && !_addressNoLimits[pTo]){
                    require(pAmount <= limitTransactionTokens, "[sharkie] transaction limit reached, cant buy more tokens!");
                }

                // sell to LP
                Tax.sell = true;
                if(_addressIndividualTaxes[pFrom]){
                    Tax.marketing = _addressIndividualTax[pFrom].sellMarketing;
                    Tax.developer = _addressIndividualTax[pFrom].sellDeveloper;
                    Tax.buyback = _addressIndividualTax[pFrom].sellBuyback;
                    transferIndividualTaxes = true;
                }else{
                    Tax.marketing = TAX_SELL_MARKETING;
                    Tax.developer = TAX_SELL_DEVELOPER;
                    Tax.buyback = TAX_SELL_BUYBACK;

                    if(LIMIT24H_ACTIVE){
                        Tax.marketing = TAX24H_SELL_MARKETING;
                        Tax.developer = TAX24H_SELL_DEVELOPER;
                        Tax.buyback = TAX24H_SELL_BUYBACK;
                    }
                }
            }

            if(!Tax.buy && !Tax.sell){
                if(LIMIT_ACTIVE && !_addressNoLimits[pTo]){
                    require(pAmount <= limitWalletTokens && _balances[pTo].add(pAmount) <= limitWalletTokens, "[sharkie] wallet limit reached, cant transfer more tokens!");
                }

                // transfer from wallet to wallet
                Tax.marketing = 0;
                Tax.developer = 0;
                Tax.buyback = 0;
            }

            // event
                emit TransferTaxes(Tax.marketing, Tax.developer, Tax.buyback, transferDirection, transferIndividualTaxes);

            if(Tax.marketing > 0){
                Tax.totalMarketing = _percentage(pAmount, Tax.marketing);
                Tax.total = Tax.total.add(Tax.totalMarketing);
                TAXES_MARKETING = TAXES_MARKETING.add(Tax.totalMarketing);
                _transactionTokens(pFrom, address(this), Tax.totalMarketing);
            }

            if(Tax.developer > 0){
                Tax.totalDeveloper = _percentage(pAmount, Tax.developer);
                Tax.total = Tax.total.add(Tax.totalDeveloper);
                TAXES_DEVELOPER = TAXES_DEVELOPER.add(Tax.totalDeveloper);
                _transactionTokens(pFrom, address(this), Tax.totalDeveloper);
            }

            if(Tax.buyback > 0){
                Tax.totalBuyback = _percentage(pAmount, Tax.buyback);
                Tax.total = Tax.total.add(Tax.totalBuyback);
                TAXES_BUYBACK = TAXES_BUYBACK.add(Tax.totalBuyback);
                _transactionTokens(pFrom, address(this), Tax.totalBuyback);
            }

            if(!_swapping && pFrom != ADDRESS_PAIR){
                uint256 taxesForSwap = TAXES_MARKETING.add(TAXES_DEVELOPER).add(TAXES_BUYBACK);
                uint256 taxesSwapped = _taxesToNative(taxesForSwap);
                uint256 swappedNativeMarketing;
                uint256 swappedNativeDeveloper;
                uint256 swappedNativeBuyback;

                if(TAXES_MARKETING > 0){               
                    swappedNativeMarketing = TAXES_MARKETING.mul(_roundingPrecision).div(taxesForSwap).mul(taxesSwapped).div(_roundingPrecision);
                    _transactionNative(ADDRESS_MARKETING, swappedNativeMarketing);
                    TAXES_MARKETING = 0;
                }

                if(TAXES_DEVELOPER > 0){
                    swappedNativeDeveloper = TAXES_DEVELOPER.mul(_roundingPrecision).div(taxesForSwap).mul(taxesSwapped).div(_roundingPrecision);
                    _transactionNative(ADDRESS_DEVELOPER, swappedNativeDeveloper);
                    TAXES_DEVELOPER = 0;
                }

                if(TAXES_BUYBACK > 0){
                    swappedNativeBuyback = TAXES_BUYBACK.mul(_roundingPrecision).div(taxesForSwap).mul(taxesSwapped).div(_roundingPrecision);
                    _transactionNative(ADDRESS_BUYBACK, swappedNativeBuyback);
                    TAXES_BUYBACK = 0;
                }

                if(address(this).balance > 0){
                    taxesSwapped = taxesSwapped.add(address(this).balance);
                    swappedNativeBuyback = swappedNativeBuyback.add(address(this).balance);
                    _transactionNative(ADDRESS_BUYBACK, address(this).balance);
                }

                // event
                    emit TransferTaxesInNative(taxesSwapped, swappedNativeMarketing, swappedNativeDeveloper, swappedNativeBuyback);
            }

            _transactionTokens(pFrom, pTo, pAmount.sub(Tax.total));
        }
    }

    function _transactionTokens(address pFrom, address pTo, uint256 pAmount) private{
        _balances[pFrom] = _balances[pFrom].sub(pAmount);
        _balances[pTo] = _balances[pTo].add(pAmount);

        emit Transfer(pFrom, pTo, pAmount);
    }

    function _transactionNative(address pTo, uint256 pAmount) private returns(bool){
        address payable to = payable(pTo);
        (bool sent, ) = to.call{value:pAmount}("");
        return(sent);
    }

    function _taxesToNative(uint256 pTaxes) private onlySwapOnce returns(uint256){
        return(_swap(PATH_TOKEN_NATIVE, pTaxes));
    }

    function _swap(address[] memory pPath, uint256 pTokens) private returns(uint256){
        uint256 balancePreSwap = address(this).balance;
        _router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            pTokens,
            0,
            pPath,
            address(this),
            block.timestamp
        );
        uint256 balancePostSwap = address(this).balance;
        return(balancePostSwap.sub(balancePreSwap));
    }

    function _percentage(uint256 pAmount, uint16 pPercent) private pure returns(uint256){
        return(pAmount.mul(pPercent).div(10**3));
    }

    event TransferLiquidity(uint256 native, uint256 token);
    function _addLiquidity() private{
        uint256 balance = address(this).balance;
        uint256 liquidityForUniswap = 50000000000000 * (10**9);

        require(balance > 0 && _balances[address(this)] >= liquidityForUniswap, "[sharkie] you do not have any coins or tokens to provide liquidity!");
        
        // event
            emit TransferLiquidity(balance, liquidityForUniswap);

        _router.addLiquidityETH{value:balance}(
            address(this),
            liquidityForUniswap,
            0,
            0,
            ADDRESS_DEVELOPER,
            block.timestamp
        );

        _liquidityProvided = true;

        renounceOwnership();
    }
}

// Smart Contract created by ElevenCloud.eth – Open for inquiries