Contract Address Details

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol

// SPDX-License-Identifier: MIT

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);
}

// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol

pragma solidity ^0.8.0;

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// File: @openzeppelin/contracts/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/token/ERC20/ERC20.sol

pragma solidity ^0.8.0;



/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

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

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

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

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

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - amount);
        }

        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

// File: @openzeppelin/contracts/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() {
        _setOwner(_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 {
        _setOwner(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");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: @openzeppelin/contracts/utils/Address.sol

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: contracts/ISwapRouter.sol

pragma solidity >=0.6.2;

interface ISwapRouter {
    function factory() external pure returns (address);
    function WWDOGE() 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 addLiquidityWDOGE(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountWDOGEMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountWDOGE, 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 removeLiquidityWDOGE(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountWDOGEMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountWDOGE);
    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 removeLiquidityWDOGEWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountWDOGEMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountWDOGE);
    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 swapExactWDOGEForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactWDOGE(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForWDOGE(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapWDOGEForExactTokens(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);

    function removeLiquidityWDOGESupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountWDOGEMin,
        address to,
        uint deadline
    ) external returns (uint amountWDOGE);
    function removeLiquidityWDOGEWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountWDOGEMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountWDOGE);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function swapExactWDOGEForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;
    function swapExactTokensForWDOGESupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

// File: contracts/ISwapFactory.sol

pragma solidity >=0.6.2;

interface ISwapFactory {
  function getPair(address tokenA, address tokenB) external view returns (address pair);
  function createPair(address tokenA, address tokenB) external view returns (address pair);
}

// File: contracts/BANK.sol

pragma solidity ^0.8.0;




contract DogeBank is Context, IERC20, Ownable {

	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 _isExcludedFromFee;

	mapping (address => bool) private _isExcluded;
	address[] private _excluded;
 
	uint256 private constant MAX = ~uint256(0);
	uint256 private _tTotal = 999999999999999 * 10**18;
	uint256 private _rTotal = (MAX - (MAX % _tTotal));
	uint256 private _tFeeTotal;

	string private _name = "DogeBank";
	string private _symbol = "BANK";
	uint8 private _decimals = 18;
	
	uint256 public _taxFee = 5;
	uint256 private _previousTaxFee = _taxFee;
	
	uint256 public _liquidityFee = 5;
	uint256 private _previousLiquidityFee = _liquidityFee;

	ISwapRouter public router;
	address public lpPair;
	
	bool inSwapAndLiquify;
	bool public swapAndLiquifyEnabled = true;
	
	uint256 public _maxTxAmount = 222222222222222 * 10**18;
	uint256 private numTokensSellToAddToLiquidity = 555555555555 * 10**18;
	
	event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
	event SwapAndLiquifyEnabledUpdated(bool enabled);
	event SwapAndLiquify(
			uint256 tokensSwapped,
			uint256 ethReceived,
			uint256 tokensIntoLiqudity
	);
	
	modifier lockTheSwap {
    inSwapAndLiquify = true;
    _;
    inSwapAndLiquify = false;
	}
	
	constructor() {
			_rOwned[address(this)] = _rTotal;

			ISwapRouter _router = ISwapRouter(0xa4EE06Ce40cb7e8c04E127c1F7D3dFB7F7039C81);

			// set the rest of the contract variables
			router = _router;

			//exclude owner and this contract from fee
			_isExcludedFromFee[owner()] = true;
			_isExcludedFromFee[address(this)] = true;
 			excludeFromReward(address(this));

			emit Transfer(address(0), address(this), _tTotal);
	}

  /* ADMIN */
  /**
     * @notice : deploys liquidity to router, and sends LP tokens to deployer
  */
  function deployLiquidity() public payable onlyOwner {
    _approve(address(this), address(router), totalSupply());

    router.addLiquidityWDOGE{ value: msg.value }(
      address(this), totalSupply(),
      0, 0, msg.sender, block.timestamp + 1000
    );
    lpPair = ISwapFactory(router.factory()).getPair(router.WWDOGE(), address(this));
  }

	function name() public view returns (string memory) {
			return _name;
	}

	function symbol() public view returns (string memory) {
			return _symbol;
	}

	function decimals() public view returns (uint8) {
			return _decimals;
	}

	function totalSupply() public view override returns (uint256) {
			return _tTotal;
	}

	function balanceOf(address account) public view override returns (uint256) {
			if (_isExcluded[account]) return _tOwned[account];
			return tokenFromReflection(_rOwned[account]);
	}

	function transfer(address recipient, uint256 amount) public override returns (bool) {
			_transfer(_msgSender(), recipient, amount);
			return true;
	}

	function allowance(address owner, address spender) public view override returns (uint256) {
			return _allowances[owner][spender];
	}

	function approve(address spender, uint256 amount) public override returns (bool) {
			_approve(_msgSender(), spender, amount);
			return true;
	}

	function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
			_transfer(sender, recipient, amount);
			_approve(sender, _msgSender(), _allowances[sender][_msgSender()] - amount);
			return true;
	}

	function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
			_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
			return true;
	}

	function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
			_approve(_msgSender(), spender, _allowances[_msgSender()][spender] - subtractedValue);
			return true;
	}

	function isExcludedFromReward(address account) public view returns (bool) {
			return _isExcluded[account];
	}

	function totalFees() public view returns (uint256) {
			return _tFeeTotal;
	}

	function deliver(uint256 tAmount) public {
			address sender = _msgSender();
			require(!_isExcluded[sender], "Excluded addresses cannot call this function");
			(uint256 rAmount,,,,,) = _getValues(tAmount);
			_rOwned[sender] = _rOwned[sender] - rAmount;
			_rTotal = _rTotal - rAmount;
			_tFeeTotal = _tFeeTotal + tAmount;
	}

	function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
			require(tAmount <= _tTotal, "Amount must be less than supply");
			if (!deductTransferFee) {
					(uint256 rAmount,,,,,) = _getValues(tAmount);
					return rAmount;
			} else {
					(,uint256 rTransferAmount,,,,) = _getValues(tAmount);
					return rTransferAmount;
			}
	}

	function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
			require(rAmount <= _rTotal, "Amount must be less than total reflections");
			uint256 currentRate =  _getRate();
			return rAmount / currentRate;
	}

	function excludeFromReward(address account) public onlyOwner() {
			// require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.');
			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) external onlyOwner() {
			require(_isExcluded[account], "Account is already 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 _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
			(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
			_tOwned[sender] = _tOwned[sender] - tAmount;
			_rOwned[sender] = _rOwned[sender] - rAmount;
			_tOwned[recipient] = _tOwned[recipient] + tTransferAmount;
			_rOwned[recipient] = _rOwned[recipient] + rTransferAmount;        
			_takeLiquidity(tLiquidity);
			_reflectFee(rFee, tFee);
			emit Transfer(sender, recipient, tTransferAmount);
	}
	
			function excludeFromFee(address account) public onlyOwner {
			_isExcludedFromFee[account] = true;
	}
	
	function includeInFee(address account) public onlyOwner {
			_isExcludedFromFee[account] = false;
	}
	
	function setTaxFeePercent(uint256 taxFee) external onlyOwner() {
			_taxFee = taxFee;
	}
	
	function setLiquidityFeePercent(uint256 liquidityFee) external onlyOwner() {
			_liquidityFee = liquidityFee;
	}
 
	function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
			_maxTxAmount = _tTotal * maxTxPercent / 10**2;
	}

	function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
			swapAndLiquifyEnabled = _enabled;
			emit SwapAndLiquifyEnabledUpdated(_enabled);
	}
	
	 //to recieve WDOGE from router when swaping
	receive() external payable {}

	function _reflectFee(uint256 rFee, uint256 tFee) private {
			_rTotal = _rTotal - rFee;
			_tFeeTotal = _tFeeTotal + tFee;
	}

	function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
			(uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getTValues(tAmount);
			(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, _getRate());
			return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity);
	}

	function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256) {
			uint256 tFee = calculateTaxFee(tAmount);
			uint256 tLiquidity = calculateLiquidityFee(tAmount);
			uint256 tTransferAmount = tAmount - tFee - tLiquidity;
			return (tTransferAmount, tFee, tLiquidity);
	}

	function _getRValues(uint256 tAmount, uint256 tFee, uint256 tLiquidity, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
			uint256 rAmount = tAmount * currentRate;
			uint256 rFee = tFee * currentRate;
			uint256 rLiquidity = tLiquidity * currentRate;
			uint256 rTransferAmount = rAmount - rFee - rLiquidity;
			return (rAmount, rTransferAmount, rFee);
	}

	function _getRate() private view returns(uint256) {
			(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
			return rSupply / tSupply;
	}

	function _getCurrentSupply() private 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 - _rOwned[_excluded[i]];
					tSupply = tSupply - _tOwned[_excluded[i]];
			}
			if (rSupply < _rTotal / _tTotal) return (_rTotal, _tTotal);
			return (rSupply, tSupply);
	}
	
	function _takeLiquidity(uint256 tLiquidity) private {
			uint256 currentRate =  _getRate();
			uint256 rLiquidity = tLiquidity * (currentRate);
			_rOwned[address(this)] = _rOwned[address(this)] + rLiquidity;
			if(_isExcluded[address(this)])
					_tOwned[address(this)] = _tOwned[address(this)] + tLiquidity;
	}
	
	function calculateTaxFee(uint256 _amount) private view returns (uint256) {
			return _amount * _taxFee / 10**2;
	}

	function calculateLiquidityFee(uint256 _amount) private view returns (uint256) {
			return _amount * _liquidityFee / 10**2;
	}
	
	function removeAllFee() private {
			if(_taxFee == 0 && _liquidityFee == 0) return;
			
			_previousTaxFee = _taxFee;
			_previousLiquidityFee = _liquidityFee;
			
			_taxFee = 0;
			_liquidityFee = 0;
	}
	
	function restoreAllFee() private {
			_taxFee = _previousTaxFee;
			_liquidityFee = _previousLiquidityFee;
	}
	
	function isExcludedFromFee(address account) public view returns(bool) {
			return _isExcludedFromFee[account];
	}

	function _approve(address owner, address spender, uint256 amount) private {
			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);
	}

	function _transfer(
			address from,
			address to,
			uint256 amount
	) private {
			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");
			if(from != address(this))
					require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");

			// 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 lp pair.
			uint256 contractTokenBalance = balanceOf(address(this));
			
			if(contractTokenBalance >= _maxTxAmount)
        contractTokenBalance = _maxTxAmount;
			
			bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
			if (
					overMinTokenBalance &&
					!inSwapAndLiquify &&
          lpPair != address(0) &&
					from != lpPair &&
					swapAndLiquifyEnabled
			) {
					contractTokenBalance = numTokensSellToAddToLiquidity;
					//add liquidity
					swapAndLiquify(contractTokenBalance);
			}
			
			//indicates if fee should be deducted from transfer
			bool takeFee = true;
			
			//if any account belongs to _isExcludedFromFee account then remove the fee
			if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
					takeFee = false;
			}
			
			//transfer amount, it will take tax, burn, liquidity fee
			_tokenTransfer(from,to,amount,takeFee);
	}

	function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
			// split the contract balance into halves
			uint256 half = contractTokenBalance / 2;
			uint256 otherHalf = contractTokenBalance - half;

			// capture the contract's current WDOGE balance.
			// this is so that we can capture exactly the amount of WDOGE that the
			// swap creates, and not make the liquidity event include any WDOGE that
			// has been manually sent to the contract
			uint256 initialBalance = address(this).balance;

			// swap tokens for WDOGE
			swapTokensForWDOGE(half);

			// how much WDOGE did we just swap into?
			uint256 newBalance = address(this).balance - initialBalance;

			// add liquidity to uniswap
			addLiquidity(otherHalf, newBalance);
			
			emit SwapAndLiquify(half, newBalance, otherHalf);
	}

	function swapTokensForWDOGE(uint256 tokenAmount) private {
			// generate the pair path of token -> wwdoge
			address[] memory path = new address[](2);
			path[0] = address(this);
			path[1] = router.WWDOGE();

			_approve(address(this), address(router), tokenAmount);

			// make the swap
			router.swapExactTokensForWDOGESupportingFeeOnTransferTokens(
					tokenAmount,
					0, // accept any amount of WDOGE
					path,
					address(this),
					block.timestamp
			);
	}

	function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
			// approve token transfer to cover all possible scenarios
			_approve(address(this), address(router), tokenAmount);

			// add the liquidity
			router.addLiquidityWDOGE{value: ethAmount}(
					address(this),
					tokenAmount,
					0, // slippage is unavoidable
					0, // slippage is unavoidable
					owner(),
					block.timestamp
			);
	}

	//this method is responsible for taking all fee, if takeFee is true
	function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
			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]) {
					_transferStandard(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) private {
			(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
			_rOwned[sender] = _rOwned[sender] - rAmount;
			_rOwned[recipient] = _rOwned[recipient] + rTransferAmount;
			_takeLiquidity(tLiquidity);
			_reflectFee(rFee, tFee);
			emit Transfer(sender, recipient, tTransferAmount);
	}

	function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
			(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
			_rOwned[sender] = _rOwned[sender] - rAmount;
			_tOwned[recipient] = _tOwned[recipient] + tTransferAmount;
			_rOwned[recipient] = _rOwned[recipient] + rTransferAmount;           
			_takeLiquidity(tLiquidity);
			_reflectFee(rFee, tFee);
			emit Transfer(sender, recipient, tTransferAmount);
	}

	function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
			(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount);
			_tOwned[sender] = _tOwned[sender] - tAmount;
			_rOwned[sender] = _rOwned[sender] - rAmount;
			_rOwned[recipient] = _rOwned[recipient] + rTransferAmount;
			_takeLiquidity(tLiquidity);
			_reflectFee(rFee, tFee);
			emit Transfer(sender, recipient, tTransferAmount);
	}

}