// File: contracts/Yishu.sol




// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @title: Etot Yishujia Tiles
/// @author: manifold.xyz

import "./manifold/ERC721Creator.sol";

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//                                                                                                                                          //
//                                                                                                                                          //
//                                                                                                                                          //
//                                                                                                                                          //
//                                                                                                                                          //
//                                                                                                                                 .        //
//                                                                                                                                 .        //
//                                                                                                                                 .        //
//                                                                                                                                ..        //
//                                                                                                                                ..        //
//                                                                                                                                ..        //
//                                                                                                                                ..        //
//                                                                                                                                ..        //
//                                                                                                                                ..        //
//        .                                                                                                                       ..        //
//        .                                                                                                                       ..        //
//        ..                                                                                                                     ...        //
//        ..                                                                                                                     ...        //
//        ..                                                                                                                     ...        //
//        .,.                                                                                                                    ...        //
//        .,.                                                                                                                    ...        //
//        ...                                                                                                                    ...        //
//        .,.                                                                                                                    ...        //
//        ...                                                          .      .....                                             ....        //
//        ....                                                   ...           ...                                              .,.         //
//        ....                                                  . .     .                                                      ....         //
//         ...                                                  .  ..  ..     ..                                               ..,.         //
//         ....                                         ..     .    .       .  .                                               ....         //
//         ....                                              ...  ..  .   ..                                                   ....         //
//          .,..                                            ...  ..  .   .,  .                                                 ..,.         //
//          .,.,                                         .  ..          .   ...              ..                                 ..          //
//          .,,..                                       ..        . .. .     .,,  .           .                                 ..          //
//          .,, .                                       .        .  .   ...  .,.. ,,.         .                                ...          //
//           .,. .                                              .   .   .,... ... .::          .                                            //
//           ...                                         .      .. ..  ....,, .... .,..     .. ......                                       //
//            ....                                      .,.        ..  .,..,,. .... ..,.     .  ..,:::,......                 ...           //
//            ...                            .  .       ..     .      .,:,....    . .....       ............,,,...            ...           //
//             ...                   .......,,,,,.      ..          ..,,::...       .  .,.    . .,:::,.....   ...,.. .      .....           //
//              ....           .....,,,,::::::,,.                  . ,..,:..                  . ..,:::,,,....      ....... .,,,.            //
//               ....     .....,....,,.,::::::,.    .             ...,.,:,                    .....:+:,,.,,....        ....,,..             //
//               ..........,...    ....,::,,::,. .                ...,.::,.           .        ...:::........,,..                           //
//                .........     .  ...,,,,,,:::.,.   .       .  .  ,,,.,:.            .        . .,::,........,....                         //
//                   .        ..  ...,,,,,,,,:,.,   ..      .. ... ,,:..:.                 .   ....::,.. .,.. ,. ...                        //
//                            ....,..,,,,,.,,:,,,   .       .. ... ,,:..,                  .,  ....,:,.,..,.. ,,.                           //
//                            .,.,,...,,,,,.,,,,.           . ...  .,,....                  ..  ..,,::.:..,.: .,,...                        //
//                            ......,..,,,,.,:,..         ,   .. . ,.,..,.                  .,  ..,,::,:..,.:..,.,...                       //
//                             ..,.....,,,,.::,,. .      .,   .. ..,.. ,,.                  .:. ..,:+:::..,.:..,,,:..                       //
//                             ....,  .,,..::,.....    ..,.   ,. .,....:,            .       ,, ..,:+:+:,,,,,,..,,,..                       //
//                             .....  .,...:,.,,,..   ...,.  ..  .. . .:,            .       ,,..,,++:::,:,,,:,,:::.                        //
//                             .....   .. .,,.::,... ..... .. ..  . . .,:                    ,,..,::+:::,,,,,+,:,:,.                        //
//                             .  ..   .  ..,,,:,,.. ...........  ... .,:    .      .        .:. :+:+:::..,:,+,,,:,.                        //
//                                 ..  ... .,,::,,,,.,... ....,,   . ...:    .      .        .:,.:++:::,. :+,:,.,...                        //
//                                     ... .,,,:,,,,..,........, ... ,..:.   ..     ...       ,,,+++:::.. ,:,,. ...                         //
//                                     .....,:,,,,::...,. ....., ... ,, :.   ..    .  .      .:.:+++:,,.   ....  .                          //
//                                     .....,:,,,,::,.,,.  .,..,.... .,..,   ..   . . ,.     .,.,+++:..    .,                               //
//                                      . ..,,,,,,::,.,..  .,.,.. ,. .,.,:.  .,   ... ,..    .,:,++:,..    ..                               //
//                                         .,,,,,,,,..,..   ,..,,... .:,,+.   .    .  ...     ::,++:,..                                     //
//                                          ...,,,....,..  ....,,..  .:::+,   .    . .....   .:,,:+:,                                       //
//                                          ...,:.  .,,.   ....,:.   .:::+:.  .    . . ...   ,+.,::,.                                       //
//                                           . .,.  .,,... ...,:,. ..,:::::.  .      ..,.....,+..:,.                                        //
//                                             .,   .,,...  . ,:,. ..,+::::.  .      ..,.....,+....                                         //
//                                             ..   ..,...... ,:,,...,::,::, . ..   ........,.:.  .                                         //
//                                              .    ...  ... ,,,....,,:,,,, . .      ... ..,.:.                                            //
//                                                   ..  .,.. ,,,, ..,.,,,.. .  .    .. ....,,,.                                            //
//                                                   .......  ,.,,...,.,,....  .  .  ,, .,.,::,.                                            //
//                                                    ......  ,.,,...,..,.. .  .  ...., .:,:::,.                                            //
//                                                     ..... .,.,,.,.,..... .  .  ,.,., .:::::,.                                            //
//                                                      .... .,.,..,........   .  ,.,.,..::+:::.                                            //
//                                                      ......,...,,,...  ...  . .,,:,,:.::::,,.                                            //
//                                        ...           ......,....,,.   ..... ...,,:,,::::::,..                                            //
//                                        .,.              ....,...... . .. .   .,,,:,,::+::,,..                                            //
//                                       .,,..            .....,.....  .... .   ....:..,::::,,.                                             //
//                                       ..,,.            .....,.....  .....     ...,..,:+::,,.                                             //
//                                       .,,..            ........... . ....     .,.....::::,..                                             //
//                                       .,,.            ............. ....      ..,....::::,.                                              //
//                                       ..,..           ...   . ...        ....    ....,,::,.                                              //
//                                       .,,..           ...        ...,,..,,,.,. .......,:+:.                                              //
//                                      .,,....          .,.    .,...,,,,,,,,,,.,.,,..,...,::.                                              //
//                                     .......          ..,.   .,.   ...... ... ..... ,:..,:,                                               //
//                                       ....            .,.   .,.   .              . .::..,,                                               //
//                                      .........        ..   ...   .,             ..  ,+,...                                               //
//                                      ....,,.          ..   ... .  ,.           .,.  .::.                                                 //
//                                     ..,..,..               .....  ...         .,.  ..::,  .                                              //
//                                      .. .,...              ..  .              ..   ..,::. ..                                             //
//                                      ......               ...  .              .   ....::,  .                                             //
//                                       .....               .,.  .                  ...,::.  ..                                            //
//                                       ...,..              .,.  ..          .     ....,+:.                                                //
//                                       ..,,..              ,..  ...      .. .     ..,,,+:.   .                                            //
//                                        ,,..               ..  ....   .....,..... ..,,,::..  ..                                           //
//                                       .,....              .. ...    ...,,,:,......,::,:,.    .                                           //
//                                      .,. .,..      .      .........,::,,,,,,,,:,.,,::::,.....                                            //
//                                  .   .,  .,,.     ...     ......,::,,,,,,,:,.,,:::,,,,,. .,,..                                           //
//                                 . .....  .,.      ...     . . ...,:::::::::::::::,.....  .,:,..                                          //
//                                ......   .....      .     .....  .,,:::::::::::::..  ......,:::..                                         //
//                      .      .....,,.   ......      .     .....  .,,:::+::::::::,.  . .,...,:::,..                                        //
//                     ..     .....,,,.  ......         ..  ,....  ..,:::++:++++:,.. ...,,....::,,..                                        //
//                    ..  .  ......,,... .,,.      .   ......,,,,  ..,,::::::::::,....,,::,.,,,,,...                                        //
//                         ......,,,.... .,...   .... ......,,,:,. ..,,::::::::::,,,.,:,:+:.,,,,.....                                       //
//                       . ..,.......,.  ..      .,.........,,,:,,..,,:::::::::::,,,.,::,::,..,.. ...                                       //
//                           ......,,,. . .     ..,...,.....,,,::,,,::::::::++++,:,,,,,:::+:,..... ..                                       //
//                           .  ...... .  . . ....,,,,,.,,,.,,,::,:::::::::+++:+:,,,,,,:,::+++:,,....                                       //
//                           .   .......  .......,,,,,..,,,,,,,:,:::::::::+++:+::,,,:,,:,:+++++::,...                                       //
//                               ......  ... .. .,,,,,..,,:,,,,:,::::::::::+::::::,,:,,,::+++:::::,..                                       //
//        .                      .....   ..... ...,,,,,.,,,,,:,:,::::::::::::::::::,::,,::::::::::,,..                                      //
//        ..                      ....   .... ...,,.,,,,,,,,,:,:,,::::::::::::::,::::::,,::+:::,,::,,.                                      //
//       ...                      ....  ..... .....,,,,,,,,,,:,:,,:,::::::::::::,::::,:::::+++:::::,,.                                      //
//                                                                                                                                          //
//                                                                                                                                          //
//                                                                                                                                          //
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


contract Yishu is ERC721Creator {
    constructor() ERC721Creator("Etot Yishujia Tiles", "Yishu") {}
}

// File: contracts/manifold/ERC721Creator.sol




// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";

contract ERC721Creator is Proxy {
    
    constructor(string memory name, string memory symbol) {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0x2d3fC875de7Fe7Da43AD0afa0E7023c9B91D06b1;
        Address.functionDelegateCall(
            0x2d3fC875de7Fe7Da43AD0afa0E7023c9B91D06b1,
            abi.encodeWithSignature("initialize(string,string)", name, symbol)
        );
    }
        
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Returns the current implementation address.
     */
     function implementation() public view returns (address) {
        return _implementation();
    }

    function _implementation() internal override view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }    

}

// File: node_modules/@openzeppelin/contracts/proxy/Proxy.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol)

pragma solidity ^0.8.0;

/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())

            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())

            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    /**
     * @dev This is a virtual function that should be overridden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive() external payable virtual {
        _fallback();
    }

    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overridden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (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 functionCallWithValue(target, data, 0, "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");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or 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 {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // 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
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

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

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

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