// File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol

pragma solidity >=0.6.2;

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);
}

// File: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol

pragma solidity >=0.6.2;


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;
}

// File: @uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol

pragma solidity >=0.5.0;

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;
}

// File: @uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol

pragma solidity >=0.5.0;

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;
}

// File: @openzeppelin/contracts/utils/math/SafeMath.sol


// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// 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 subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// File: @openzeppelin/contracts/utils/Address.sol


// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @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
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 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);
            }
        }
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol


// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @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 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 `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, 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 `from` to `to` 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 from,
        address to,
        uint256 amount
    ) external returns (bool);
}

// File: @openzeppelin/contracts/utils/Context.sol


// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @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;
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol


// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;


/**
 * @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.
 *
 * 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(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: contracts/GoblinGold.sol

/*

ggggggggOUblin GOuLD

G0bliiiiiiN git GULD.
GoBLeeen sell goLD.

gobLEEEN overLORD say 2 PERceent bye tax, 6 pearCEANT seal takes

*/

pragma solidity ^0.8.0;










contract GOBLINGOLD is Context, IERC20, Ownable {
    using SafeMath for uint256;
    using Address for address;

    string private _name = "Goblin Gold";
    string private _symbol = "GOBLIN";
    uint8 private _decimals = 18;

    uint256 private constant MAX = ~uint256(0);
    uint256 private _totalTokenSupply = 1000000 ether;
    uint256 private _totalReflections = (MAX - (MAX % _totalTokenSupply));
    mapping(address => uint256) private _reflectionsOwned;
    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _maxPercentagePerAddress = 2;

    address payable public _treasuryAddress;
    uint256 private _currentBuyTax = 2; 
    uint256 private _currentSellTax = 6; 
    uint256 public _fixedBuyTax = 2; 
    uint256 public _fixedSellTax = 6;

    // guud GoooooooBLEENS pay NO taxeesss
    mapping(address => bool) private _isExcludedFromTaxes;

    // fukDAGoblin Whaaales
    mapping(address => bool) private _renderedUseless;

 
    address private uniDefault = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    IUniswapV2Router02 public immutable uniswapV2Router;
    bool private _inSwap = false;
    address public immutable uniswapV2Pair;

    uint256 private _minimumTokensToSwap = 1;

    modifier lockTheSwap() {
        _inSwap = true;
        _;
        _inSwap = false;
    }

    constructor(address payable treasuryAddress, address router) {
        require(
            (treasuryAddress != address(0)),
            "Give me the treasury address"
        );
        _treasuryAddress = treasuryAddress;
        _reflectionsOwned[_msgSender()] = _totalReflections;

        if (router == address(0)) {
            router = uniDefault;
        }
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(router);

        address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());
        uniswapV2Pair = _uniswapV2Pair;
        uniswapV2Router = _uniswapV2Router;

        _isExcludedFromTaxes[owner()] = true;
        _isExcludedFromTaxes[address(this)] = true;
        _isExcludedFromTaxes[_treasuryAddress] = true;

        emit Transfer(address(0), _msgSender(), _totalTokenSupply);
    }

    receive() external payable {
        return;
    }

    

    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) {
        uint256 currentRate = _getRate();
        return _totalReflections.div(currentRate);
    }

    function getETHBalance() public view returns (uint256 balance) {
        return address(this).balance;
    }

    function allowance(address owner, address spender)
        public
        view
        override
        returns (uint256)
    {
        return _allowances[owner][spender];
    }

    function balanceOf(address account) public view override returns (uint256) {
        return tokensFromReflection(_reflectionsOwned[account]);
    }

    function reflectionFromToken(
        uint256 amountOfTokens,
        bool deductTaxForReflections
    ) public view returns (uint256) {
        require(
            amountOfTokens <= _totalTokenSupply,
            "Amount must be less than supply"
        );
        if (!deductTaxForReflections) {
            (uint256 reflectionsToDebit, , , ) = _getValues(amountOfTokens);
            return reflectionsToDebit;
        } else {
            (, uint256 reflectionsToCredit, , ) = _getValues(amountOfTokens);
            return reflectionsToCredit;
        }
    }

    function tokensFromReflection(uint256 amountOfReflections)
        public
        view
        returns (uint256)
    {
        require(
            amountOfReflections <= _totalReflections,
            "ERC20: Amount too large"
        );
        uint256 currentRate = _getRate();
        return amountOfReflections.div(currentRate);
    }

//
// PuBLEECk FUNcTiiiiioNS
//

    function transfer(address recipient, uint256 amount)
            public
            override
            returns (bool)
        {
            _transfer(_msgSender(), recipient, amount);
            return true;
        }

        function approve(address spender, uint256 amount)
            public
            override
            returns (bool)
        {
            _approve(_msgSender(), spender, 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,
                    "ERC20: transfer amount exceeds allowance"
                )
            );
            return true;
        }

        function increaseAllowance(address spender, uint256 addedValue)
            public
            virtual
            returns (bool)
        {
            _approve(
                _msgSender(),
                spender,
                _allowances[_msgSender()][spender].add(addedValue)
            );
            return true;
        }

        function decreaseAllowance(address spender, uint256 subtractedValue)
            public
            virtual
            returns (bool)
        {
            _approve(
                _msgSender(),
                spender,
                _allowances[_msgSender()][spender].sub(
                    subtractedValue,
                    "ERC20: decreased allowance below zero"
                )
            );
            return true;
        }


//
// GOBLeeeeeen oooooooVERLerd oNLY
//

function setMaxPercentagePerWallet(uint256 amount) external onlyOwner {
        _maxPercentagePerAddress = amount;
    }

    function setTreasuryAddress(address payable treasuryAddress) external {
        require(_msgSender() == _treasuryAddress, "You cannot call this");
        require(
            (treasuryAddress != address(0)),
            "Give me the treasury address"
        );
        address _previousTreasuryAddress = _treasuryAddress;
        _treasuryAddress = treasuryAddress;
        _isExcludedFromTaxes[treasuryAddress] = true;
        _isExcludedFromTaxes[_previousTreasuryAddress] = false;
    }

    function excludeFromTaxes(address account, bool excluded)
        external
        onlyOwner
    {
        _isExcludedFromTaxes[account] = excluded;
    }

    function renderUseless(address account, bool excluded) external onlyOwner {
        _renderedUseless[account] = excluded;
    }

    function setBuyTax(uint256 tax) external onlyOwner {
        require(tax <= 100, "ERC20: tax out of band");
        _currentBuyTax = tax;
        _fixedBuyTax = tax;
    }

    function setSellTax(uint256 tax) external onlyOwner {
        require(tax <= 100, "ERC20: tax out of band");
        _currentSellTax = tax;
        _fixedSellTax = tax;
    }

    function manualSend() external onlyOwner {
        uint256 _contractETHBalance = address(this).balance;
        _sendETHToTreasury(_contractETHBalance);
    }

    function manualSwap() external onlyOwner {
        uint256 _contractBalance = balanceOf(address(this));
        _swapTokensForEth(_contractBalance);
    }

//
// Nout FER U
//

function _approve(
        address owner,
        address spender,
        uint256 amount
    ) private {
        require(owner != address(0), "ERC20: approve from 0 address");
        require(spender != address(0), "ERC20: approve to 0 address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }


    function _transfer(
        address sender,
        address recipient,
        uint256 amountOfTokens
    ) private {
        require(sender != address(0), "ERC20: transfer from 0 address");
        require(recipient != address(0), "ERC20: transfer to 0 address");
        require(amountOfTokens > 0, "ERC20: Transfer more than zero");

        if (recipient != address(_treasuryAddress)) {
            require(!(_renderedUseless[sender]), "you cannot trade");
        }


        bool takeFee = true;
        if (_isExcludedFromTaxes[sender] || _isExcludedFromTaxes[recipient]) {
            takeFee = false;
        }

        bool buySide = false;
        if (sender == address(uniswapV2Pair)) {
            buySide = true;
        }

        if (!takeFee) {
            _setNoFees();
        } else if (buySide) {
            _setBuySideTaxes();
        } else {
            _setSellSideTaxes();
        }

        _tokenTransfer(sender, recipient, amountOfTokens);

        _restoreAllTaxesToDefaults();
    }

    function _tokenTransfer(
        address sender,
        address recipient,
        uint256 amountOfTokens
    ) private {
        if (sender == _treasuryAddress && recipient == address(this)) {
            _manualReflect(amountOfTokens);
            return;
        }


        (
            uint256 reflectionsToDebit, // sender
            uint256 reflectionsToCredit, // recipient
            uint256 reflectionsForBuyTax, // to all the hodlers
            uint256 reflectionsForSellTax // to treasury
        ) = _getValues(amountOfTokens);


        if (
            recipient != uniswapV2Pair &&
            !_isExcludedFromTaxes[sender] &&
            !_isExcludedFromTaxes[recipient] &&
            tokensFromReflection(
                _reflectionsOwned[recipient].add(reflectionsToCredit)
            ) >=
            _totalTokenSupply.mul(_maxPercentagePerAddress).div(100)
        ) {
            revert("over max percentage per wallet");
        }

        if (sender == address(uniswapV2Pair)) {
            _takeTaxes(reflectionsForBuyTax);
        } else {
            _takeTaxes(reflectionsForSellTax);
        }

        uint256 contractTokenBalance = balanceOf(address(this));
        bool overMinTokenBalance = contractTokenBalance >= _minimumTokensToSwap;
        if (!_inSwap && overMinTokenBalance && reflectionsForSellTax != 0) {
            _swapTokensForEth(contractTokenBalance);
        }

        uint256 contractETHBalance = address(this).balance;
        if (contractETHBalance > 0) {
            _sendETHToTreasury(contractETHBalance);
        }


        _reflectionsOwned[sender] = _reflectionsOwned[sender].sub(
            reflectionsToDebit
        );
        _reflectionsOwned[recipient] = _reflectionsOwned[recipient].add(
            reflectionsToCredit
        );

        emit Transfer(sender, recipient, reflectionsToCredit.div(_getRate()));
    }


    function _manualReflect(uint256 amountOfTokens) private {
        uint256 currentRate = _getRate();
        uint256 amountOfReflections = amountOfTokens.mul(currentRate);

 
        _reflectionsOwned[_treasuryAddress] = _reflectionsOwned[
            _treasuryAddress
        ].sub(amountOfReflections);
        _totalReflections = _totalReflections.sub(amountOfReflections);

        emit Transfer(_msgSender(), address(this), amountOfTokens);
    }


    function _takeTaxes(uint256 reflectionsForTaxes) private {
        _reflectionsOwned[address(this)] = _reflectionsOwned[address(this)].add(
            reflectionsForTaxes
        );
    }


    function _swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();

        _approve(address(this), address(uniswapV2Router), tokenAmount);

        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(_treasuryAddress),
            block.timestamp
        );
    }

    function _sendETHToTreasury(uint256 amount) private {
        _treasuryAddress.call{value: amount}("");
    }

    function _setBuySideTaxes() private {
        _currentBuyTax = _fixedBuyTax;
        _currentSellTax = 0;
    }

    function _setSellSideTaxes() private {
        _currentBuyTax = 0;
        _currentSellTax = _fixedSellTax;
    }

    function _setNoFees() private {
        _currentBuyTax = 0;
        _currentSellTax = 0;
    }


    function _restoreAllTaxesToDefaults() private {
        _currentBuyTax = _fixedBuyTax;
        _currentSellTax = _fixedSellTax;
    }


    function _getValues(uint256 amountOfTokens)
        private
        view
        returns (
            uint256,
            uint256,
            uint256,
            uint256
        )
    {

        (
            uint256 tokensToTransfer,
            uint256 buySideTokensTax,
            uint256 sellSideTokensTax
        ) = _getTokenValues(amountOfTokens);

        uint256 currentRate = _getRate();
        uint256 reflectionsTotal = amountOfTokens.mul(currentRate);
        uint256 reflectionsToTransfer = tokensToTransfer.mul(currentRate);
        uint256 reflectionsForBuyTax = buySideTokensTax.mul(currentRate);
        uint256 reflectionsForSellTax = sellSideTokensTax.mul(currentRate);

        return (
            reflectionsTotal,
            reflectionsToTransfer,
            reflectionsForBuyTax,
            reflectionsForSellTax
        );
    }

    function _getRate() private view returns (uint256) {
        return _totalReflections.div(_totalTokenSupply);
    }

    function _getTokenValues(uint256 amountOfTokens)
        private
        view
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        uint256 buySideTokensTax = amountOfTokens.mul(_currentBuyTax).div(100);
        uint256 sellSideTokensTax = amountOfTokens.mul(_currentSellTax).div(
            100
        );
        uint256 tokensToTransfer = amountOfTokens.sub(buySideTokensTax).sub(
            sellSideTokensTax
        );
        return (tokensToTransfer, buySideTokensTax, sellSideTokensTax);
    }
}