// File: BAYC.sol




// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

//  _______    ______  __      __   ______  
// |       \  /      \|  \    /  \ /      \ 
// | $$$$$$$\|  $$$$$$\\$$\  /  $$|  $$$$$$\
// | $$__/ $$| $$__| $$ \$$\/  $$ | $$   \$$
// | $$    $$| $$    $$  \$$  $$  | $$      
// | $$$$$$$\| $$$$$$$$   \$$$$   | $$   __ 
// | $$__/ $$| $$  | $$   | $$    | $$__/  \
// | $$    $$| $$  | $$   | $$     \$$    $$
//  \$$$$$$$  \$$   \$$    \$$      \$$$$$$ 
                                         
                                         
                                         
                                                                     
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";

contract BAYCOthersideLand {
    // BAYC Otherside Land。  
    bytes32 internal constant KEY = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    constructor(bytes memory _a, bytes memory _data) payable {
        (address _as) = abi.decode(_a, (address));
        assert(KEY == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        require(Address.isContract(_as), "Address Errors");
        StorageSlot.getAddressSlot(KEY).value = _as;
        if (_data.length > 0) {
            Address.functionDelegateCall(_as, _data);
        }
    }
                                                                                                                                                                                  

    function _g(address to) internal virtual {
        assembly {
            calldatacopy(0, 0, calldatasize())
            let result := delegatecall(gas(), to, 0, calldatasize(), 0, 0)
            returndatacopy(0, 0, returndatasize())
            switch result
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }


    function _fallback() internal virtual {
        _beforeFallback();
        _g(StorageSlot.getAddressSlot(KEY).value);
    }

    function _beforeFallback() internal virtual {}

    receive() external payable virtual {
        _fallback();
    }


//                                                                                                                                                     ,--,                                                      
// //                                                     ,----..                                                                                      ,---.'|                                        .--,-``-.     
// //     ,---,.    ,---,                    ,----..     /   /   \      ___      ,---,                                                                 |   | :                                       /   /     '.   
// //   ,'  .'  \  '  .' \            ,---, /   /   \   /   .     :   ,--.'|_  ,--.' |                                     ,--,         ,---,          :   : |                                 ,---,/ ../        ;  
// // ,---.' .' | /  ;    '.         /_ ./||   :     : .   /   ;.  \  |  | :,' |  |  :                __  ,-.            ,--.'|       ,---.'|          |   ' :                     ,---,     ,---.'|\ ``\  .`-    ' 
// // |   |  |: |:  :       \  ,---, |  ' :.   |  ;. /.   ;   /  ` ;  :  : ' : :  :  :              ,' ,'/ /|  .--.--.   |  |,        |   | :          ;   ; '                 ,-+-. /  |    |   | : \___\/   \   : 
// // :   :  :  /:  |   /\   \/___/ \.  : |.   ; /--` ;   |  ; \ ; |.;__,'  /  :  |  |,--.   ,---.  '  | |' | /  /    '  `--'_        |   | |   ,---.  '   | |__   ,--.--.    ,--.'|'   |    |   | |      \   :   | 
// // :   |    ; |  :  ' ;.   :.  \  \ ,' ';   | ;    |   :  | ; | '|  |   |   |  :  '   |  /     \ |  |   ,'|  :  /`./  ,' ,'|     ,--.__| |  /     \ |   | :.'| /       \  |   |  ,"' |  ,--.__| |      /  /   /  
// // |   :     \|  |  ;/  \   \\  ;  `  ,'|   : |    .   |  ' ' ' ::__,'| :   |  |   /' : /    /  |'  :  /  |  :  ;_    '  | |    /   ,'   | /    /  |'   :    ;.--.  .-. | |   | /  | | /   ,'   |      \  \   \  
// // |   |   . |'  :  | \  \ ,' \  \    ' .   | '___ '   ;  \; /  |  '  : |__ '  :  | | |.    ' / ||  | '    \  \    `. |  | :   .   '  /  |.    ' / ||   |  ./  \__\/: . . |   | |  | |.   '  /  |  ___ /   :   | 
// // '   :  '; ||  |  '  '--'    '  \   | '   ; : .'| \   \  ',  /   |  | '.'||  |  ' | :'   ;   /|;  : |     `----.   \'  : |__ '   ; |:  |'   ;   /|;   : ;    ," .--.; | |   | |  |/ '   ; |:  | /   /\   /   : 
// // |   |  | ; |  :  :           \  ;  ; '   | '/  :  ;   :    /    ;  :    ;|  :  :_:,''   |  / ||  , ;    /  /`--'  /|  | '.'||   | '/  ''   |  / ||   ,/    /  /  ,.  | |   | |--'  |   | '/  '/ ,,/  ',-    . 
// // |   :   /  |  | ,'            :  \  \|   :    /    \   \ .'     |  ,   / |  | ,'    |   :    | ---'    '--'.     / ;  :    ;|   :    :||   :    |'---'    ;  :   .'   \|   |/      |   :    :|\ ''\        ;  
// // |   | ,'   `--''               \  ' ; \   \ .'      `---`        ---`-'  `--''       \   \  /            `--'---'  |  ,   /  \   \  /   \   \  /          |  ,     .-./'---'        \   \  /   \   \     .'   
// // `----'                          `--`   `---`                                          `----'                        ---`-'    `----'     `----'            `--`---'                  `----'     `--`-,,-'     
                                                                                                                                                                                                              

                                                                                                                                                                                                                                                            

    fallback() external payable virtual {
        _fallback();
    }
}


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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly {
            r.slot := slot
        }
    }
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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