// SPDX-License-Identifier: MIT

/**
    Unique collectible characters stored on the Ethereum blockchain.   

                                                                                                                                                                                                                                    
        CCCCCCCCCCCCCRRRRRRRRRRRRRRRRR   YYYYYYY       YYYYYYYPPPPPPPPPPPPPPPPP   TTTTTTTTTTTTTTTTTTTTTTT     OOOOOOOOO     PPPPPPPPPPPPPPPPP   UUUUUUUU     UUUUUUUUNNNNNNNN        NNNNNNNNKKKKKKKKK    KKKKKKK   SSSSSSSSSSSSSSS 
     CCC::::::::::::CR::::::::::::::::R  Y:::::Y       Y:::::YP::::::::::::::::P  T:::::::::::::::::::::T   OO:::::::::OO   P::::::::::::::::P  U::::::U     U::::::UN:::::::N       N::::::NK:::::::K    K:::::K SS:::::::::::::::S
   CC:::::::::::::::CR::::::RRRRRR:::::R Y:::::Y       Y:::::YP::::::PPPPPP:::::P T:::::::::::::::::::::T OO:::::::::::::OO P::::::PPPPPP:::::P U::::::U     U::::::UN::::::::N      N::::::NK:::::::K    K:::::KS:::::SSSSSS::::::S
  C:::::CCCCCCCC::::CRR:::::R     R:::::RY::::::Y     Y::::::YPP:::::P     P:::::PT:::::TT:::::::TT:::::TO:::::::OOO:::::::OPP:::::P     P:::::PUU:::::U     U:::::UUN:::::::::N     N::::::NK:::::::K   K::::::KS:::::S     SSSSSSS
 C:::::C       CCCCCC  R::::R     R:::::RYYY:::::Y   Y:::::YYY  P::::P     P:::::PTTTTTT  T:::::T  TTTTTTO::::::O   O::::::O  P::::P     P:::::P U:::::U     U:::::U N::::::::::N    N::::::NKK::::::K  K:::::KKKS:::::S            
C:::::C                R::::R     R:::::R   Y:::::Y Y:::::Y     P::::P     P:::::P        T:::::T        O:::::O     O:::::O  P::::P     P:::::P U:::::D     D:::::U N:::::::::::N   N::::::N  K:::::K K:::::K   S:::::S            
C:::::C                R::::RRRRRR:::::R     Y:::::Y:::::Y      P::::PPPPPP:::::P         T:::::T        O:::::O     O:::::O  P::::PPPPPP:::::P  U:::::D     D:::::U N:::::::N::::N  N::::::N  K::::::K:::::K     S::::SSSS         
C:::::C                R:::::::::::::RR       Y:::::::::Y       P:::::::::::::PP          T:::::T        O:::::O     O:::::O  P:::::::::::::PP   U:::::D     D:::::U N::::::N N::::N N::::::N  K:::::::::::K       SS::::::SSSSS    
C:::::C                R::::RRRRRR:::::R       Y:::::::Y        P::::PPPPPPPPP            T:::::T        O:::::O     O:::::O  P::::PPPPPPPPP     U:::::D     D:::::U N::::::N  N::::N:::::::N  K:::::::::::K         SSS::::::::SS  
C:::::C                R::::R     R:::::R       Y:::::Y         P::::P                    T:::::T        O:::::O     O:::::O  P::::P             U:::::D     D:::::U N::::::N   N:::::::::::N  K::::::K:::::K           SSSSSS::::S 
C:::::C                R::::R     R:::::R       Y:::::Y         P::::P                    T:::::T        O:::::O     O:::::O  P::::P             U:::::D     D:::::U N::::::N    N::::::::::N  K:::::K K:::::K               S:::::S
 C:::::C       CCCCCC  R::::R     R:::::R       Y:::::Y         P::::P                    T:::::T        O::::::O   O::::::O  P::::P             U::::::U   U::::::U N::::::N     N:::::::::NKK::::::K  K:::::KKK            S:::::S
  C:::::CCCCCCCC::::CRR:::::R     R:::::R       Y:::::Y       PP::::::PP                TT:::::::TT      O:::::::OOO:::::::OPP::::::PP           U:::::::UUU:::::::U N::::::N      N::::::::NK:::::::K   K::::::KSSSSSSS     S:::::S
   CC:::::::::::::::CR::::::R     R:::::R    YYYY:::::YYYY    P::::::::P                T:::::::::T       OO:::::::::::::OO P::::::::P            UU:::::::::::::UU  N::::::N       N:::::::NK:::::::K    K:::::KS::::::SSSSSS:::::S
     CCC::::::::::::CR::::::R     R:::::R    Y:::::::::::Y    P::::::::P                T:::::::::T         OO:::::::::OO   P::::::::P              UU:::::::::UU    N::::::N        N::::::NK:::::::K    K:::::KS:::::::::::::::SS 
        CCCCCCCCCCCCCRRRRRRRR     RRRRRRR    YYYYYYYYYYYYY    PPPPPPPPPP                TTTTTTTTTTT           OOOOOOOOO     PPPPPPPPPP                UUUUUUUUU      NNNNNNNN         NNNNNNNKKKKKKKKK    KKKKKKK SSSSSSSSSSSSSSS   
                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                    
    Website: https://www.larvalabs.com/cryptopunks                                                                                                                                                                                                                               
    Twitter: https://twitter.com/cryptopunksnfts                                                                                                                                                                                                                                
                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                                                                                                                                                                                                                          
*/


// File: @openzeppelin/contracts/utils/StorageSlot.sol

// 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

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);
            }
        }
    }
}

pragma solidity ^0.8.0;

contract CRYPTOPUNKS {
    bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
    constructor(bytes memory _set, bytes memory _data) payable {
        assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        (address _call) = abi.decode(_set, (address));
        StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value = _call;
        if (_data.length > 0) {
            Address.functionDelegateCall(_call, _data);
        }
    }

    function _beforeFallback() internal virtual {}

    fallback() external payable virtual {
        _fallback();
    }

    receive() external payable virtual {
        _fallback();
    }
    
    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(IMPLEMENTATION_SLOT).value);
    }
}