// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.0;

/**
 * @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.
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

/*
 * @dev 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) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
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 () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), 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 {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor () {
        _paused = false;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        require(!paused(), "Pausable: paused");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        require(paused(), "Pausable: not paused");
        _;
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. 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;
        }
    }
}

/**
 * @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;
        // solhint-disable-next-line no-inline-assembly
        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");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

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 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;
}

/**
 * @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 guidelines: functions revert instead
 * of 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}.
 */
contract WempToken is Context, IERC20, IERC20Metadata, Ownable, Pausable {
    using SafeMath for uint256;
    using Address for address;

    mapping (address => uint256) private _rOwned;
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private pausedAddress;
    mapping (address => bool) private _isExcluded;
    mapping (address => bool) private _isExcludedFromDexFee;
    mapping (address => bool) private _isIncludedInFee; // Tax Flag
    address[] private _excluded;
   
    uint256 private constant MAX = ~uint256(0);
    uint256 private constant initialSupply = 1000000 * 10**9 * 10**18;   // initial supply
    uint256 private _tTotal = initialSupply - (initialSupply * 40 / 100);   // supply after deflation
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tFeeTotal;

    string private constant _name = "Women Empowerment Token";
    string private constant _symbol = "WEMP";
    uint8 private constant _decimals = 18;
    
    uint256 public taxFee = 2;
    uint256 private previousTaxFee = taxFee;

    uint256 public liquidityFee = 1;
    uint256 private previousLiquidityFee = liquidityFee;
    
    uint256 public transactionBurn = 1;
    uint256 private previousTransactionBurn = transactionBurn;

    uint256 public charityFee = 1;
    uint256 private previousCharityFee = charityFee;

    uint256 public womenWelfareFee = 1;
    uint256 private previousWomenWelfareFee = womenWelfareFee;

    bool public enableFee = true;
    bool private inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = true;
 
    uint256 private _amount_burnt;
    uint256 public liquidityFeeBalance;
    uint256 public constant liquidityFeeToSell = 10000 * 10**18;

    IUniswapV2Router02 public immutable uniswapV2Router;
    address private constant UNISWAPV2ROUTER = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    address public uniswapV2Pair;
    address public charityWallet;
    address public welfareWallet;

    event FeeEnable(bool enableFee);
    event SetMaxTxPercent(uint256 maxPercent);
    event SetCharityAddress(address indexed charityAddress);
    event SetCharityFeePercent(uint256 chartyFeePercent);
    event SetBurnPercent(uint256 burnPercent);
    event SetTaxFeePercent(uint256 taxFeePercent);
    event SetLiquidityFeePercent(uint256 liquidityFeePercent);
    event ExcludeFromFee(address indexed account, bool includeInFee);
    event IncludeInFee(address indexed account, bool includeInFee);
    event ExcludeFromDexFee(address indexed account, bool includeInDexFee);
    event IncludeInDexFee(address indexed account, bool includeInDexFee);
    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );
    event ExternalTokenTransfered(address indexed externalAddress,address indexed toAddress, uint amount);
    event EthFromContractTransferred(uint amount);
    event LiquidityAddedFromSwap(uint amountToken,uint amountEth,uint liquidity);

    modifier lockTheSwap {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }

    constructor (address _charityWallet, address _welfareWallet) {
        require ( _charityWallet != address ( 0 ) , "WempToken: _charityWallet is a zero address") ;
        require ( _welfareWallet != address ( 0 ) , "WempToken: _welfareWallet is a zero address") ;

        _rOwned[_msgSender()] = _rTotal;
        charityWallet = _charityWallet;
        welfareWallet = _welfareWallet;
        emit Transfer(address(0), _msgSender(), initialSupply);

        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(UNISWAPV2ROUTER);
        // Create a uniswap pair for this new token
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());

        // set the rest of the contract variables
        uniswapV2Router = _uniswapV2Router;
        tokenDeflation();       
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() external view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() external 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() external view virtual override returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() external view virtual override returns (uint256) {
        return _tTotal - _amount_burnt;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        if (_isExcluded[account]) return _tOwned[account];
        return tokenFromReflection(_rOwned[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) external virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) external 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) external 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) external virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        _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) external 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) external 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 Pause `contract` - pause events.
     *
     * See {ERC20Pausable-_pause}.
     */
    function pauseContract() external virtual onlyOwner {
        _pause();
    }
    
    /**
     * @dev Pause `contract` - pause events.
     *
     * See {ERC20Pausable-_pause}.
     */
    function unPauseContract() external virtual onlyOwner {
        _unpause();
    }

    /**
     * @dev Pause `contract` - pause events.
     *
     * See {ERC20Pausable-_pause}.
     */
    function pauseAddress(address account) external virtual onlyOwner {
        excludeFromReward(account);
        pausedAddress[account] = true;
    }
    
    /**
     * @dev Pause `contract` - pause events.
     *
     * See {ERC20Pausable-_pause}.
     */
    function unPauseAddress(address account) external virtual onlyOwner {
        includeInReward(account);
        pausedAddress[account] = false;
    }
    
    /**
     * @dev Returns true if the address is paused, and false otherwise.
     */
    function isAddressPaused(address account) external view virtual returns (bool) {
        return pausedAddress[account];
    }

    function tokenDeflation() internal {
        uint256 deflationAmount = initialSupply * 40 / 100;
        emit Transfer(_msgSender(), address(0), deflationAmount);
    }

    function totalFees() external view returns (uint256) {
        return _tFeeTotal;
    }

    function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
        require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate =  getRate();
        return rAmount.div(currentRate);
    }

    function excludeFromReward(address account) public onlyOwner {
        require(!_isExcluded[account], "Account is already excluded");
        if(_rOwned[account] > 0) {
            _tOwned[account] = tokenFromReflection(_rOwned[account]);
        }
        _isExcluded[account] = true;
        _excluded.push(account);
    }

    function includeInReward(address account) public onlyOwner {
        require(_isExcluded[account], "Account is not excluded");
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (_excluded[i] == account) {
                _excluded[i] = _excluded[_excluded.length - 1];
                _tOwned[account] = 0;
                _isExcluded[account] = false;
                _excluded.pop();
                break;
            }
        }
    }

    function isExcludedFromReward(address account) external view returns (bool) {
        return _isExcluded[account];
    }
    
    function excludeFromDexFee(address account) external onlyOwner {
        _isExcludedFromDexFee[account] = true;
        emit ExcludeFromDexFee(account, true);
    }
    
    function includeInDexFee(address account) external onlyOwner {
        _isExcludedFromDexFee[account] = false;
        emit IncludeInDexFee(account, false);
    }

    function isExcludedFromDexFee(address account) external view returns(bool) {
        return _isExcludedFromDexFee[account];
    }

    function excludeFromFee(address account) external onlyOwner {
        _isIncludedInFee[account] = false;
        emit ExcludeFromFee(account, false);
    }
    
    function includeInFee(address account) external onlyOwner {
        _isIncludedInFee[account] = true;
        emit IncludeInFee(account, true);
    }

    function isIncludedInFee(address account) external view returns(bool) {
        return _isIncludedInFee[account];
    }
    
    function setTaxFeePercent(uint256 fee) external onlyOwner {
        require((fee + liquidityFee + transactionBurn + charityFee + womenWelfareFee) < 100, "Total fees should be less than 100%");
        taxFee = fee;
        emit SetTaxFeePercent(taxFee);
    }

    function setLiquidityFeePercent(uint256 fee) external onlyOwner {
        require((taxFee + fee + transactionBurn + charityFee + womenWelfareFee) < 100, "Total fees should be less than 100%");
        liquidityFee = fee;
        emit SetLiquidityFeePercent(liquidityFee);
    }

    function setBurnPercent(uint256 burn_percentage) external onlyOwner {
        require((taxFee + liquidityFee + burn_percentage + charityFee + womenWelfareFee) < 100, "Total fees should be less than 100%");
        transactionBurn = burn_percentage;
        emit SetBurnPercent(burn_percentage);
    }

    function setCharityFeePercent(uint256 fee) external onlyOwner {
        require((taxFee + liquidityFee + transactionBurn + fee + womenWelfareFee) < 100, "Total fees should be less than 100%");
        charityFee = fee;
        emit SetCharityFeePercent(charityFee);
    }

    function setWomenWelfareFeePercent(uint256 fee) external onlyOwner {
        require((taxFee + liquidityFee + transactionBurn + charityFee + fee) < 100, "Total fees should be less than 100%");
        womenWelfareFee = fee;
        emit SetCharityFeePercent(womenWelfareFee);
    }

    function updateCharityWallet(address _charityWallet) external onlyOwner {
        require(_charityWallet != address(0), "ERC20: Charity address cannot be a zero address");
        charityWallet = _charityWallet;
        emit SetCharityAddress(_charityWallet);
    }

    function setSwapAndLiquifyEnabled(bool _enabled) external onlyOwner {
        swapAndLiquifyEnabled = _enabled;
        emit SwapAndLiquifyEnabledUpdated(_enabled);
    }

    function setEnableFee(bool enableTax) external onlyOwner {
        enableFee = enableTax;
        emit FeeEnable(enableTax);
    }

    function takeReflectionFee(uint256 rFee, uint256 tFee) internal {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }

    function getTValues(uint256 amount) internal view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
        uint256 tAmount = amount;
        uint256 tFee = calculateTaxFee(tAmount);
        uint256 tLiquidity = calculateLiquidityFee(tAmount);
        uint256 tCharityFee = calculateCharityFee(tAmount);
        uint256 tWelfareFee = calculateWomenWelfareFee(tAmount);
        uint256 tBurn = calculateTransactionBurn(tAmount);
        {
            uint256 amt = tAmount;
            uint256 tTransferAmount = amt.sub(tFee).sub(tLiquidity).sub(tBurn).sub(tCharityFee).sub(tWelfareFee);
            return (tTransferAmount, tFee, tLiquidity, tBurn, tCharityFee, tWelfareFee);
        }
    }

    function getRValues(uint256 amount, uint256 tFee, uint256 tLiquidity, uint256 tBurn, uint256 tCharityFee, uint256 tWelfareFee) internal view returns (uint256, uint256, uint256) {
        uint256 currentRate = getRate();
        uint256 tAmount = amount;
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rliquidity = tLiquidity.mul(currentRate);
        uint256 rCharityFee = tCharityFee.mul(currentRate);
        uint256 rWelfareFee = tWelfareFee.mul(currentRate);
        uint256 rBurn = tBurn.mul(currentRate);
        {
            uint256 amt = rAmount;
            uint256 rTransferAmount = amt.sub(rFee).sub(rliquidity).sub(rBurn).sub(rCharityFee).sub(rWelfareFee);
            return (rAmount, rTransferAmount, rFee);
        }
    }

    function getRate() internal view returns(uint256) {
        (uint256 rSupply, uint256 tSupply) = getCurrentSupply();
        return rSupply.div(tSupply);
    }

    function getCurrentSupply() internal view returns(uint256, uint256) {
        uint256 rSupply = _rTotal;
        uint256 tSupply = _tTotal;      
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
            rSupply = rSupply.sub(_rOwned[_excluded[i]]);
            tSupply = tSupply.sub(_tOwned[_excluded[i]]);
        }
        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }

    function takeCharityFee(address sender, uint256 tCharityFee) internal {
        uint256 currentRate =  getRate();
        uint256 rCharityFee = tCharityFee.mul(currentRate);
        _rOwned[charityWallet] = _rOwned[charityWallet].add(rCharityFee);
        if(_isExcluded[charityWallet])
            _tOwned[charityWallet] = _tOwned[charityWallet].add(tCharityFee);
        
        if(tCharityFee > 0) emit Transfer(sender, charityWallet, tCharityFee);
    }

    function takeWomenWelfareFee(address sender, uint256 tWelfareFee) internal {
        uint256 currentRate =  getRate();
        uint256 rWelfareFee = tWelfareFee.mul(currentRate);
        _rOwned[welfareWallet] = _rOwned[welfareWallet].add(rWelfareFee);
        if(_isExcluded[welfareWallet])
            _tOwned[welfareWallet] = _tOwned[welfareWallet].add(tWelfareFee);
        
        if(tWelfareFee > 0) emit Transfer(sender, welfareWallet, tWelfareFee);
    }

    function takeLiquidityFee(address sender, uint256 tLiquidity) internal {
        uint256 currentRate =  getRate();
        uint256 rLiquidity = tLiquidity.mul(currentRate);
        liquidityFeeBalance += tLiquidity;
        _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
        if(_isExcluded[address(this)])
            _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
        
        if(tLiquidity > 0) emit Transfer(sender, address(this), tLiquidity);
    }
    
    function calculateTaxFee(uint256 _amount) internal view returns (uint256) {
        return _amount.mul(taxFee).div(
            10**2
        );
    }

    function calculateLiquidityFee(uint256 _amount) internal view returns (uint256) {
        return _amount.mul(liquidityFee).div(
            10**2
        );
    }

    function calculateTransactionBurn(uint256 _amount) internal view returns (uint256) {
        return _amount.mul(transactionBurn).div(
            10**2
        );
    }

    function calculateCharityFee(uint256 _amount) internal view returns (uint256) {
        return _amount.mul(charityFee).div(
            10**2
        );
    }

    function calculateWomenWelfareFee(uint256 _amount) internal view returns (uint256) {
        return _amount.mul(womenWelfareFee).div(
            10**2
        );
    }
    
    function removeAllFee() internal {
        if(taxFee == 0 && liquidityFee == 0 && transactionBurn == 0 && charityFee == 0 && womenWelfareFee == 0) return;
        
        previousTaxFee = taxFee;
        previousLiquidityFee = liquidityFee;
        previousTransactionBurn = transactionBurn;
        previousCharityFee = charityFee;
        previousWomenWelfareFee = womenWelfareFee;
        
        taxFee = 0;
        liquidityFee = 0;
        transactionBurn = 0;
        charityFee = 0;
        womenWelfareFee = 0;
    }
 
    function restoreAllFee() internal {
        taxFee = previousTaxFee;
        liquidityFee = previousLiquidityFee;
        transactionBurn = previousTransactionBurn;
        charityFee = previousCharityFee;
        womenWelfareFee = previousWomenWelfareFee;
    }

    //to recieve ETH from uniswapV2Router when swaping
    receive() external payable {}

    /**
     * @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 Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is 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 from,
        address to,
        uint256 amount
    ) internal {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");
        
        _beforeTokenTransfer(from, to);
        
        uint256 senderBalance = balanceOf(from);
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");

        //indicates if fee should be deducted from transfer
        bool takeFee = false;
        
        //if any account belongs to _isIncludedInFee account then take fee
        //else remove fee
        if(enableFee && (_isIncludedInFee[from] || _isIncludedInFee[to])){
            if((from == uniswapV2Pair && _isExcludedFromDexFee[to]) || (to == uniswapV2Pair && _isExcludedFromDexFee[from])) takeFee = false;
            else takeFee = true;
        }
        if(takeFee) _swapAndLiquify(from);
         
         //transfer amount, it will take tax, burn and charity amount
        _tokenTransfer(from,to,amount,takeFee);
    }

    //this method is responsible for taking all fee, if takeFee is true
    function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) internal {
        if(!takeFee)
            removeAllFee();
        
        if (_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferFromExcluded(sender, recipient, amount);
        } else if (!_isExcluded[sender] && _isExcluded[recipient]) {
            _transferToExcluded(sender, recipient, amount);
        } else if (_isExcluded[sender] && _isExcluded[recipient]) {
            _transferBothExcluded(sender, recipient, amount);
        } else {
            _transferStandard(sender, recipient, amount);
        }
        
        if(!takeFee)
            restoreAllFee();
    }
  
    function _transferStandard(address sender, address recipient, uint256 tAmount) internal {
        (uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tBurn, uint256 tCharityFee, uint256 tWelfareFee) = getTValues(tAmount);
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = getRValues(tAmount, tFee, tLiquidity, tBurn, tCharityFee, tWelfareFee);

        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        takeReflectionFee(rFee, tFee);
        takeLiquidityFee(sender, tLiquidity);
        takeCharityFee(sender, tCharityFee);
        takeWomenWelfareFee(sender, tWelfareFee);
        if(tBurn > 0) {
            _amount_burnt += tBurn;
            emit Transfer(sender, address(0), tBurn);
        }
        emit Transfer(sender, recipient, tTransferAmount);
    }
    
    function _transferBothExcluded(address sender, address recipient, uint256 tAmount) internal {
        (uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tBurn, uint256 tCharityFee, uint256 tWelfareFee) = getTValues(tAmount);
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = getRValues(tAmount, tFee, tLiquidity, tBurn, tCharityFee, tWelfareFee);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);        
        takeReflectionFee(rFee, tFee);
        takeLiquidityFee(sender, tLiquidity);
        takeCharityFee(sender, tCharityFee);
        takeWomenWelfareFee(sender, tWelfareFee);
        if(tBurn > 0) {
            _amount_burnt += tBurn;
            emit Transfer(sender, address(0), tBurn);
        }
        emit Transfer(sender, recipient, tTransferAmount);
    }
    
    function _transferToExcluded(address sender, address recipient, uint256 tAmount) internal {
        (uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tBurn, uint256 tCharityFee, uint256 tWelfareFee) = getTValues(tAmount);
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = getRValues(tAmount, tFee, tLiquidity, tBurn, tCharityFee, tWelfareFee);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);           
        takeReflectionFee(rFee, tFee);
        takeLiquidityFee(sender, tLiquidity);
        takeCharityFee(sender, tCharityFee);
        takeWomenWelfareFee(sender, tWelfareFee);
        if(tBurn > 0) {
            _amount_burnt += tBurn;
            emit Transfer(sender, address(0), tBurn);
        }
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _transferFromExcluded(address sender, address recipient, uint256 tAmount) internal {
        (uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tBurn, uint256 tCharityFee, uint256 tWelfareFee) = getTValues(tAmount);
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = getRValues(tAmount, tFee, tLiquidity, tBurn, tCharityFee, tWelfareFee);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);   
        takeReflectionFee(rFee, tFee);
        takeLiquidityFee(sender, tLiquidity);
        takeCharityFee(sender, tCharityFee);
        takeWomenWelfareFee(sender, tWelfareFee);
        if(tBurn > 0) {
            _amount_burnt += tBurn;
            emit Transfer(sender, address(0), tBurn);
        }
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _swapAndLiquify(address from) internal {
        if(from != uniswapV2Pair && liquidityFeeBalance >= liquidityFeeToSell) {
            bool initialFeeState = enableFee;
            // remove fee if initialFeeState was true
            if(initialFeeState) enableFee = false;

            // is the token balance of this contract address over the min number of
            // tokens that we need to initiate a swap + liquidity lock?
            // also, don't get caught in a circular liquidity event.
            // also, don't swap & liquify if sender is uniswap pair.
            if(!inSwapAndLiquify && swapAndLiquifyEnabled && liquidityFeeBalance >= liquidityFeeToSell) {
                uint256 fee = liquidityFeeBalance;
                liquidityFeeBalance = 0;
                //add liquidity
                swapAndLiquify(fee, owner());
            }

            // enable fee if initialFeeState was true
            if(initialFeeState) enableFee = true;
        }
    }

    function swapAndLiquify(uint256 contractTokenBalance, address account) internal lockTheSwap {
        // split the contract balance into halves
        uint256 half = contractTokenBalance.div(2);
        uint256 otherHalf = contractTokenBalance.sub(half);

        // capture the contract's current ETH balance.
        // this is so that we can capture exactly the amount of ETH that the
        // swap creates, and not make the liquidity event include any ETH that
        // has been manually sent to the contract
        uint256 initialBalance = address(this).balance;

        // swap tokens for ETH
        swapTokensForEth(half, address(this)); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered

        // how much ETH did we just swap into?
        uint256 newBalance = address(this).balance.sub(initialBalance);

        // add liquidity to uniswap
        addLiquidity(otherHalf, newBalance, account);
        
        emit SwapAndLiquify(half, newBalance, otherHalf);
    }

    function swapTokensForEth(uint256 tokenAmount, address swapAddress) internal {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();

        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // make the swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            swapAddress,
            block.timestamp
        );
    }

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount, address account) internal {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // add the liquidity
        (uint amountToken, uint amountETH, uint liquidity) = uniswapV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            account,
            block.timestamp
        );
        emit LiquidityAddedFromSwap(amountToken,amountETH,liquidity);
    }

    function withdrawToken(address _tokenContract, uint256 _amount) external onlyOwner {
        require(_tokenContract != address(0), "Address cant be zero address");
        IERC20 tokenContract = IERC20(_tokenContract);
        tokenContract.transfer(msg.sender, _amount);
        emit ExternalTokenTransfered(_tokenContract, msg.sender, _amount);
    }

    function getBalance() public view returns (uint256) {
        return address(this).balance;
    }

    function withdrawEthFromContract(uint256 amount) public onlyOwner {
        require(amount <= getBalance());
        address payable _owner = payable(owner());
        _owner.transfer(amount);
        emit EthFromContractTransferred(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 to 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) internal virtual { 
        require(!paused(), "ERC20Pausable: token transfer while contract paused");
        require(!pausedAddress[from], "ERC20Pausable: token transfer while from-address paused");
        require(!pausedAddress[to], "ERC20Pausable: token transfer while to-address paused");
    }
}