Code for 0x7765…2b85 (TCGDragons)

Since block 14140648

Verified contract

// SPDX-License-Identifier: MIT

pragma solidity 0.8.11;



/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}


/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

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

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}



/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}


/**
 * @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);
            }
        }
    }
}



/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}


/**
 * @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;
    }
}



/**
 * @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() {
        _transferOwnership(_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 {
        _transferOwnership(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");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}



/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}



/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}




abstract contract ContextMixin {
    function msgSender()
        internal
        view
        returns (address payable sender)
    {
        if (msg.sender == address(this)) {
            bytes memory array = msg.data;
            uint256 index = msg.data.length;
            assembly {
                // Load the 32 bytes word from memory with the address on the lower 20 bytes, and mask those.
                sender := and(
                    mload(add(array, index)),
                    0xffffffffffffffffffffffffffffffffffffffff
                )
            }
        } else {
            sender = payable(msg.sender);
        }
        return sender;
    }
}


// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}


contract Initializable {
    bool inited = false;

    modifier initializer() {
        require(!inited, "already inited");
        _;
        inited = true;
    }
}


contract EIP712Base is Initializable {
    struct EIP712Domain {
        string name;
        string version;
        address verifyingContract;
        bytes32 salt;
    }

    string constant public ERC712_VERSION = "1";

    bytes32 internal constant EIP712_DOMAIN_TYPEHASH = keccak256(
        bytes(
            "EIP712Domain(string name,string version,address verifyingContract,bytes32 salt)"
        )
    );
    bytes32 internal domainSeperator;

    // supposed to be called once while initializing.
    // one of the contracts that inherits this contract follows proxy pattern
    // so it is not possible to do this in a constructor
    function _initializeEIP712(
        string memory name
    )
        internal
        initializer
    {
        _setDomainSeperator(name);
    }

    function _setDomainSeperator(string memory name) internal {
        domainSeperator = keccak256(
            abi.encode(
                EIP712_DOMAIN_TYPEHASH,
                keccak256(bytes(name)),
                keccak256(bytes(ERC712_VERSION)),
                address(this),
                bytes32(getChainId())
            )
        );
    }

    function getDomainSeperator() public view returns (bytes32) {
        return domainSeperator;
    }

    function getChainId() public view returns (uint256) {
        uint256 id;
        assembly {
            id := chainid()
        }
        return id;
    }

    /**
     * Accept message hash and returns hash message in EIP712 compatible form
     * So that it can be used to recover signer from signature signed using EIP712 formatted data
     * https://eips.ethereum.org/EIPS/eip-712
     * "\\x19" makes the encoding deterministic
     * "\\x01" is the version byte to make it compatible to EIP-191
     */
    function toTypedMessageHash(bytes32 messageHash)
        internal
        view
        returns (bytes32)
    {
        return
            keccak256(
                abi.encodePacked("\x19\x01", getDomainSeperator(), messageHash)
            );
    }
}


contract NativeMetaTransaction is EIP712Base {
    using SafeMath for uint256;
    bytes32 private constant META_TRANSACTION_TYPEHASH = keccak256(
        bytes(
            "MetaTransaction(uint256 nonce,address from,bytes functionSignature)"
        )
    );
    event MetaTransactionExecuted(
        address userAddress,
        address payable relayerAddress,
        bytes functionSignature
    );
    mapping(address => uint256) nonces;

    /*
     * Meta transaction structure.
     * No point of including value field here as if user is doing value transfer then he has the funds to pay for gas
     * He should call the desired function directly in that case.
     */
    struct MetaTransaction {
        uint256 nonce;
        address from;
        bytes functionSignature;
    }

    function executeMetaTransaction(
        address userAddress,
        bytes memory functionSignature,
        bytes32 sigR,
        bytes32 sigS,
        uint8 sigV
    ) public payable returns (bytes memory) {
        MetaTransaction memory metaTx = MetaTransaction({
            nonce: nonces[userAddress],
            from: userAddress,
            functionSignature: functionSignature
        });

        require(
            verify(userAddress, metaTx, sigR, sigS, sigV),
            "Signer and signature do not match"
        );

        // increase nonce for user (to avoid re-use)
        nonces[userAddress] = nonces[userAddress].add(1);

        emit MetaTransactionExecuted(
            userAddress,
            payable(msg.sender),
            functionSignature
        );

        // Append userAddress and relayer address at the end to extract it from calling context
        (bool success, bytes memory returnData) = address(this).call(
            abi.encodePacked(functionSignature, userAddress)
        );
        require(success, "Function call not successful");

        return returnData;
    }

    function hashMetaTransaction(MetaTransaction memory metaTx)
        internal
        pure
        returns (bytes32)
    {
        return
            keccak256(
                abi.encode(
                    META_TRANSACTION_TYPEHASH,
                    metaTx.nonce,
                    metaTx.from,
                    keccak256(metaTx.functionSignature)
                )
            );
    }

    function getNonce(address user) public view returns (uint256 nonce) {
        nonce = nonces[user];
    }

    function verify(
        address signer,
        MetaTransaction memory metaTx,
        bytes32 sigR,
        bytes32 sigS,
        uint8 sigV
    ) internal view returns (bool) {
        require(signer != address(0), "NativeMetaTransaction: INVALID_SIGNER");
        return
            signer ==
            ecrecover(
                toTypedMessageHash(hashMetaTransaction(metaTx)),
                sigV,
                sigR,
                sigS
            );
    }
}


/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to owner address
    mapping(uint256 => address) private _owners;

    // Mapping owner address to token count
    mapping(address => uint256) private _balances;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        require(owner != address(0), "ERC721: balance query for the zero address");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _owners[tokenId];
        require(owner != address(0), "ERC721: owner query for nonexistent token");
        return owner;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}..
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");

        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString(), "/")) : "";
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overridden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ERC721.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not owner nor approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");

        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
        _safeTransfer(from, to, tokenId, _data);
    }

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * `_data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _owners[tokenId] != address(0);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        require(_exists(tokenId), "ERC721: operator query for nonexistent token");
        address owner = ERC721.ownerOf(tokenId);
        return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
    }

    /**
     * @dev Safely mints `tokenId` and transfers it to `to`.
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 tokenId) internal virtual {
        _safeMint(to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _mint(to, tokenId);
        require(
            _checkOnERC721Received(address(0), to, tokenId, _data),
            "ERC721: transfer to non ERC721Receiver implementer"
        );
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _beforeTokenTransfer(address(0), to, tokenId);

        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(address(0), to, tokenId);

        _afterTokenTransfer(address(0), to, tokenId);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId);

        // Clear approvals
        _approve(address(0), tokenId);

        _balances[owner] -= 1;
        delete _owners[tokenId];

        emit Transfer(owner, address(0), tokenId);

        _afterTokenTransfer(owner, address(0), tokenId);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId);

        _balances[from] -= 1;
        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);

        _afterTokenTransfer(from, to, tokenId);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits a {ApprovalForAll} event.
     */
    function _setApprovalForAll(
        address owner,
        address operator,
        bool approved
    ) internal virtual {
        require(owner != operator, "ERC721: approve to caller");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        if (to.isContract()) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
                return retval == IERC721Receiver.onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, ``from``'s `tokenId` 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 tokenId
    ) 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.
     * - `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 tokenId
    ) internal virtual {}
}


contract OwnableDelegateProxy {}

/**
 * Used to delegate ownership of a contract to another address, to save on unneeded transactions to approve contract use for users
 */
contract ProxyRegistry {
    mapping(address => OwnableDelegateProxy) public proxies;
}

/**
 * @title ERC721Tradable
 * ERC721Tradable - ERC721 contract that whitelists a trading address, and has minting functionality.
 */
abstract contract ERC721Tradable is ERC721, ContextMixin, NativeMetaTransaction, Ownable {
    using SafeMath for uint256;
    using Counters for Counters.Counter;

    /**
     * We rely on the OZ Counter util to keep track of the next available ID.
     * We track the nextTokenId instead of the currentTokenId to save users on gas costs. 
     * Read more about it here: https://shiny.mirror.xyz/OUampBbIz9ebEicfGnQf5At_ReMHlZy0tB4glb9xQ0E
     */ 
    Counters.Counter private _nextTokenId;
    address public proxyRegistryAddress;

    constructor(
        string memory _name,
        string memory _symbol
    ) ERC721(_name, _symbol) {
        proxyRegistryAddress = 0xa5409ec958C83C3f309868babACA7c86DCB077c1;
        // nextTokenId is initialized to 1, since starting at 0 leads to higher gas cost for the first minter
        _nextTokenId.increment();
        _initializeEIP712(_name);
    }

    function setProxy(address _proxyRegistryAddress) public onlyOwner{
        proxyRegistryAddress = _proxyRegistryAddress;
    }

    /**
     * @dev Mints a token to an address with a tokenURI.
     * @param _to address of the future owner of the token
     */
    function mintTo(address _to) public onlyOwner {
        uint256 currentTokenId = _nextTokenId.current();
        _nextTokenId.increment();
        _safeMint(_to, currentTokenId);
    }

    function claimMintTo(address _to) private {
        uint256 currentTokenId = _nextTokenId.current();
        _nextTokenId.increment();
        _safeMint(_to, currentTokenId);
        emit Dragon(_to, currentTokenId);
    }

    /**
        @dev Returns the total tokens minted so far.
        1 is always subtracted from the Counter since it tracks the next available tokenId.
     */
    function totalSupply() public view returns (uint256) {
        return _nextTokenId.current() - 1;
    }

    function baseTokenURI() virtual public view returns (string memory);

    function tokenURI(uint256 _tokenId) override public view returns (string memory) {
        return string(abi.encodePacked(baseTokenURI(), Strings.toString(_tokenId), "/"));
    }

    /**
     * Override isApprovedForAll to whitelist user's OpenSea proxy accounts to enable gas-less listings.
     */
    function isApprovedForAll(address owner, address operator)
        override
        public
        view
        returns (bool)
    {
        // Whitelist OpenSea proxy contract for easy trading.
        ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
        if (address(proxyRegistry.proxies(owner)) == operator) {
            return true;
        }

        return super.isApprovedForAll(owner, operator);
    }

    /**
     * This is used instead of msg.sender as transactions won't be sent by the original token owner, but by OpenSea.
     */
    function _msgSender()
        internal
        override
        view
        returns (address sender)
    {
        return ContextMixin.msgSender();
    }


    // game developer's account
    address public original_signer = 0x839C90C930C635ec6E0052592A402D5E341d213e;
    mapping(string => bool) public mintKeys;
    event Dragon(address indexed _to, uint256 indexed _id);
    bytes32 public session_token;
    string public abii;

    // set signer address
    function setOriginalSigner(address _original_signer) public onlyOwner{
        original_signer = _original_signer;
    }

    // player claims price
    function claimDragon(bytes32 _hashedMessage, uint8 _v, bytes32 _r, bytes32 _s, string memory _mintKey) public  returns (bool) {
        bytes memory prefix = "\x19Ethereum Signed Message:\n32";


        
        session_token = keccak256(abi.encodePacked(_mintKey));


        if(session_token != _hashedMessage){
            return false;
        }
        
        bytes32 prefixedHashMessage = keccak256(abi.encodePacked(prefix, _hashedMessage));
        address signer = ecrecover(prefixedHashMessage, _v, _r, _s);

        if(mintKeys[_mintKey] != true){
            // if the signature is signed by the owner
            if (signer == original_signer) {
                claimMintTo(msg.sender);
                mintKeys[_mintKey] = true;
                // give player (msg.sender) a prize
                return true;
            }
        }
        return false;
    }
}



/**
 * @title Creature
 * Creature - a contract for my non-fungible creatures.
 */
contract TCGDragons is ERC721Tradable {
  string _tokenURI;  

  constructor() ERC721Tradable("TCG World Dragons", "TCGD") { 
      _tokenURI = "https://tcg.blockczech.io/dragons/";
   }

  function baseTokenURI() public view override returns (string memory) {
    return _tokenURI;
  }

  function _setTokenURI(string memory tokenURI) public onlyOwner {
        _tokenURI = tokenURI;
  }
}

Contract sourced from Etherscan. Solidity version v0.8.11+commit.d7f03943.

Panoramix decompilation

# Palkeoramix decompiler. 

const getChainId = chainid
const ERC712_VERSION = '1', 0

def storage:
  stor0 is array of struct at storage 0
  stor1 is array of struct at storage 1
  ownerOf is mapping of address at storage 2
  balanceOf is mapping of uint256 at storage 3
  approved is mapping of address at storage 4
  stor5 is mapping of uint8 at storage 5
  domainSeperator is uint256 at storage 7
  owner is address at storage 9
  stor10 is uint256 at storage 10
  proxyRegistryAddress is address at storage 11
  original_signerAddress is address at storage 12
  stor13 is mapping of uint8 at storage 13
  session_token is uint256 at storage 14
  stor15 is array of struct at storage 15
  stor16 is array of struct at storage 16

def getApproved(uint256 tokenId): # not payable
  require calldata.size - 4 >=′ 32
  require tokenId == tokenId
  if not ownerOf[tokenId]:
      revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: approved query for nonexistent token'
  return approved[tokenId]

def getDomainSeperator(): # not payable
  return domainSeperator

def getNonce(address user): # not payable
  require calldata.size - 4 >=′ 32
  require user == user
  return nonce[address(user)].field_0

def ownerOf(uint256 tokenId): # not payable
  require calldata.size - 4 >=′ 32
  require tokenId == tokenId
  if not ownerOf[tokenId]:
      revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: owner query for nonexistent token'
  return ownerOf[tokenId]

def balanceOf(address account): # not payable
  require calldata.size - 4 >=′ 32
  require account == account
  if not account:
      revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: balance query for the zero address'
  return balanceOf[address(account)]

def owner(): # not payable
  return owner

def original_signer(): # not payable
  return original_signerAddress

def proxyRegistryAddress(): # not payable
  return proxyRegistryAddress

def session_token(): # not payable
  return session_token

def mintKeys(string _param1): # not payable
  require calldata.size - 4 >=′ 32
  require _param1 <= LOCK8605463013()
  require _param1 + 35 <′ calldata.size
  if _param1.length > LOCK8605463013():
      revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
  if ceil32(ceil32(_param1.length)) + 97 > LOCK8605463013() or ceil32(ceil32(_param1.length)) + 97 < 96:
      revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
  require _param1 + _param1.length + 36 <= calldata.size
  return bool(stor13[_param1[all]])

#
#  Regular functions
#

def _fallback(?) payable: # default function
  revert

def totalSupply(): # not payable
  if stor10 < 1:
      revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
  return (stor10 - 1)

def supportsInterface(bytes4 interfaceId): # not payable
  require calldata.size - 4 >=′ 32
  require interfaceId == Mask(32, 224, interfaceId)
  if Mask(32, 224, interfaceId) == 0x80ac58cd00000000000000000000000000000000000000000000000000000000:
      return True
  if Mask(32, 224, interfaceId) == 0x5b5e139f00000000000000000000000000000000000000000000000000000000:
      return True
  return (Mask(32, 224, interfaceId) == 0x1ffc9a700000000000000000000000000000000000000000000000000000000)

def renounceOwnership(): # not payable
  if this.address != caller:
      if owner != caller:
          revert with 0, 'Ownable: caller is not the owner'
  else:
      mem[96] = calldata.size
      mem[128 len calldata.size] = call.data[0 len calldata.size]
      if owner != mem[calldata.size + 108 len 20]:
          revert with 0, 'Ownable: caller is not the owner'
  owner = 0
  log OwnershipTransferred(
        address previousOwner=owner,
        address newOwner=0)

def setProxy(address _proxy): # not payable
  require calldata.size - 4 >=′ 32
  require _proxy == _proxy
  if this.address != caller:
      if owner != caller:
          revert with 0, 'Ownable: caller is not the owner'
  else:
      mem[96] = calldata.size
      mem[128 len calldata.size] = call.data[0 len calldata.size]
      if owner != mem[calldata.size + 108 len 20]:
          revert with 0, 'Ownable: caller is not the owner'
  proxyRegistryAddress = _proxy

def setOriginalSigner(address _original_signer): # not payable
  require calldata.size - 4 >=′ 32
  require _original_signer == _original_signer
  if this.address != caller:
      if owner != caller:
          revert with 0, 'Ownable: caller is not the owner'
  else:
      mem[96] = calldata.size
      mem[128 len calldata.size] = call.data[0 len calldata.size]
      if owner != mem[calldata.size + 108 len 20]:
          revert with 0, 'Ownable: caller is not the owner'
  original_signerAddress = _original_signer

def isApprovedForAll(address owner, address operator): # not payable
  require calldata.size - 4 >=′ 64
  require owner == owner
  require operator == operator
  static call proxyRegistryAddress.proxies(address ) with:
          gas gas_remaining wei
         args owner
  if not ext_call.success:
      revert with ext_call.return_data[0 len return_data.size]
  require return_data.size >=′ 32
  require ext_call.return_data[0] == ext_call.return_data[12 len 20]
  if ext_call.return_data[12 len 20] != operator:
      return bool(stor5[address(owner)][address(operator)])
  return 1

def transferOwnership(address newOwner): # not payable
  require calldata.size - 4 >=′ 32
  require newOwner == newOwner
  if this.address != caller:
      if owner != caller:
          revert with 0, 'Ownable: caller is not the owner'
      if not newOwner:
          revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'Ownable: new owner is the zero address'
  else:
      mem[96] = calldata.size
      mem[128 len calldata.size] = call.data[0 len calldata.size]
      if owner != mem[calldata.size + 108 len 20]:
          revert with 0, 'Ownable: caller is not the owner'
      if not newOwner:
          revert with 0, 'Ownable: new owner is the zero address'
  ('bool', ('param', 'newOwner'))
  owner = newOwner
  log OwnershipTransferred(
        address previousOwner=owner,
        address newOwner=newOwner)

def setApprovalForAll(address operator, bool approved): # not payable
  require calldata.size - 4 >=′ 64
  require operator == operator
  require approved == approved
  if this.address != caller:
      if caller == operator:
          revert with 0, 'ERC721: approve to caller'
      stor5[caller][address(operator)] = uint8(approved)
      log ApprovalForAll(
            address owner=approved,
            address operator=caller,
            bool approved=operator)
  else:
      mem[96] = calldata.size
      mem[128 len calldata.size] = call.data[0 len calldata.size]
      if mem[calldata.size + 108 len 20] == operator:
          revert with 0, 'ERC721: approve to caller'
      stor5[mem[calldata.size + 108 len 20]][address(operator)] = uint8(approved)
      log ApprovalForAll(
            address owner=approved,
            address operator=mem[calldata.size + 108 len 20],
            bool approved=operator)

def claimDragon(bytes32 _hashedMessage, uint8 _v, bytes32 _r, bytes32 _s, string _mintKey): # not payable
  require calldata.size - 4 >=′ 160
  require _hashedMessage == _hashedMessage
  require _v == _v
  require _r == _r
  require _s == _s
  require _mintKey <= LOCK8605463013()
  require _mintKey + 35 <′ calldata.size
  if _mintKey.length > LOCK8605463013():
      revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
  if ceil32(ceil32(_mintKey.length)) + 97 > LOCK8605463013() or ceil32(ceil32(_mintKey.length)) + 97 < 96:
      revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
  require _mintKey + _mintKey.length + 36 <= calldata.size
  session_token = sha3(Mask(8 * _mintKey.length, -(8 * _mintKey.length) + 256, _mintKey[all], Mask(8 * ceil32(_mintKey.length) - _mintKey.length, -(8 * ceil32(_mintKey.length) + -ceil32(ceil32(_mintKey.length)) + 31) + 256, 28) >> -(8 * ceil32(_mintKey.length) + -ceil32(ceil32(_mintKey.length)) + 31) + 256) << (8 * _mintKey.length) - 256)
  if session_token == _hashedMessage:
      ...  # Decompilation aborted, sorry: ("decompilation didn't finish",)
  else:
      return 0

def _setTokenURI(string tokenURI_): # not payable
  require calldata.size - 4 >=′ 32
  require tokenURI_ <= LOCK8605463013()
  require tokenURI_ + 35 <′ calldata.size
  if tokenURI_.length > LOCK8605463013():
      revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
  if ceil32(ceil32(tokenURI_.length)) + 97 > LOCK8605463013() or ceil32(ceil32(tokenURI_.length)) + 97 < 96:
      revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
  require tokenURI_ + tokenURI_.length + 36 <= calldata.size
  mem[128 len tokenURI_.length] = tokenURI_[all]
  mem[tokenURI_.length + 128] = 0
  if this.address != caller:
      if owner != caller:
          revert with 0, 'Ownable: caller is not the owner'
  else:
      mem[ceil32(ceil32(tokenURI_.length)) + 97] = calldata.size
      mem[ceil32(ceil32(tokenURI_.length)) + 129 len calldata.size] = call.data[0 len calldata.size]
      if owner != mem[ceil32(ceil32(tokenURI_.length)) + calldata.size + 109 len 20]:
          revert with 0, 'Ownable: caller is not the owner'
  if bool(stor16.length):
      if bool(stor16.length) == stor16.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if tokenURI_.length:
          stor16[].field_0 = Array(len=tokenURI_.length, data=tokenURI_[all])
      else:
          stor16.length = 0
          idx = 0
          while stor16.length.field_1 + 31 / 32 > idx:
              stor16[idx].field_0 = 0
              idx = idx + 1
              continue 
  else:
      if bool(stor16.length) == stor16.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if tokenURI_.length:
          stor16[].field_0 = Array(len=tokenURI_.length, data=tokenURI_[all])
      else:
          stor16.length = 0
          idx = 0
          while stor16.length.field_1 + 31 / 32 > idx:
              stor16[idx].field_0 = 0
              idx = idx + 1
              continue 

def executeMetaTransaction(address userAddress, bytes functionSignature, bytes32 sigR, bytes32 sigS, uint8 sigV) payable: 
  require calldata.size - 4 >=′ 160
  require userAddress == userAddress
  require functionSignature <= LOCK8605463013()
  require functionSignature + 35 <′ calldata.size
  if functionSignature.length > LOCK8605463013():
      revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
  if ceil32(ceil32(functionSignature.length)) + 97 > LOCK8605463013() or ceil32(ceil32(functionSignature.length)) + 97 < 96:
      revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
  require functionSignature + functionSignature.length + 36 <= calldata.size
  require sigR == sigR
  require sigS == sigS
  require sigV == sigV
  if not userAddress:
      revert with 0, 'NativeMetaTransaction: INVALID_SIGNER'
  signer = erecover(sha3(0, domainSeperator, sha3(sha3(0xfe4d6574615472616e73616374696f6e2875696e74323536206e6f6e63652c616464726573732066726f6d2c62797465732066756e6374696f6e5369676e6174757265), nonce[address(userAddress)].field_0, address(userAddress), sha3(functionSignature[all]))), sigV << 248, sigR, sigS) # precompiled
  if not erecover.result:
      revert with ext_call.return_data[0 len return_data.size]
  if userAddress != address(signer):
      revert with 0, 'Signer and signature do not match'
  if nonce[address(userAddress)].field_0 > -2:
      revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
  nonce[address(userAddress)].field_0++
  mem[ceil32(ceil32(functionSignature.length)) + 675] = 96
  mem[ceil32(ceil32(functionSignature.length)) + 707] = functionSignature.length
  mem[ceil32(ceil32(functionSignature.length)) + 739 len ceil32(functionSignature.length)] = functionSignature[all], nonce[address(userAddress)].field_-(8 * ceil32(functionSignature.length) + -ceil32(ceil32(functionSignature.length)) + 31) + 256
  if ceil32(functionSignature.length) > functionSignature.length:
      mem[ceil32(ceil32(functionSignature.length)) + functionSignature.length + 739] = 0
  log MetaTransactionExecuted(
        address userAddress=address(userAddress),
        address relayerAddress=caller,
        bytes functionSignature=Array(len=functionSignature.length, data=functionSignature[all]))
  mem[ceil32(ceil32(functionSignature.length)) + functionSignature.length + 663 len floor32(functionSignature.length + 51)] = Mask(8 * ceil32(functionSignature.length), -(8 * ceil32(functionSignature.length)) + 256, functionSignature[all], nonce[address(userAddress)].field_-(8 * ceil32(functionSignature.length) + -ceil32(ceil32(functionSignature.length)) + 31) + 256) << (8 * ceil32(functionSignature.length)) - 256, Mask((8 * -ceil32(functionSignature.length) + functionSignature.length + 32) - 96, 0, userAddress) << 96, mem[ceil32(ceil32(functionSignature.length)) + functionSignature.length + 675 len floor32(functionSignature.length + 51) + -functionSignature.length - 32]
  if floor32(functionSignature.length + 51) > functionSignature.length + 20:
      mem[ceil32(ceil32(functionSignature.length)) + (2 * functionSignature.length) + 683] = 0
  call this.address.mem[ceil32(ceil32(functionSignature.length)) + functionSignature.length + 663 len 4] with:
       gas gas_remaining wei
      args mem[ceil32(ceil32(functionSignature.length)) + functionSignature.length + 667 len functionSignature.length + 16]
  if not ext_call.success:
      revert with 0, 'Function call not successful'
  if not return_data.size:
      return Array(len=functionSignature.length, data=functionSignature[all])
  return Array(len=return_data.size, data=ext_call.return_data[0 len return_data.size])

def approve(address spender, uint256 amount): # not payable
  require calldata.size - 4 >=′ 64
  require spender == spender
  require amount == amount
  if not ownerOf[amount]:
      revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: owner query for nonexistent token'
  if spender == ownerOf[amount]:
      revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: approval to current owner'
  if this.address != caller:
      if caller == ownerOf[amount]:
          approved[amount] = spender
          if not ownerOf[amount]:
              revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: owner query for nonexistent token'
      else:
          if this.address != caller:
              static call proxyRegistryAddress.proxies(address ) with:
                      gas gas_remaining wei
                     args ownerOf[amount]
              if not ext_call.success:
                  revert with ext_call.return_data[0 len return_data.size]
              require return_data.size >=′ 32
              require ext_call.return_data[0] == ext_call.return_data[12 len 20]
              if ext_call.return_data[12 len 20] != caller:
                  if not stor5[stor2[amount]][caller]:
                      revert with 0, 'ERC721: approve caller is not owner nor approved for all'
          else:
              mem[96] = calldata.size
              mem[128 len calldata.size] = call.data[0 len calldata.size]
              static call proxyRegistryAddress.proxies(address ) with:
                      gas gas_remaining wei
                     args ownerOf[amount]
              if not ext_call.success:
                  revert with ext_call.return_data[0 len return_data.size]
              require return_data.size >=′ 32
              require ext_call.return_data[0] == ext_call.return_data[12 len 20]
              if ext_call.return_data[12 len 20] != mem[calldata.size + 108 len 20]:
                  if not stor5[stor2[amount]][address(mem[calldata.size + 96])]:
                      revert with 0, 'ERC721: approve caller is not owner nor approved for all'
          approved[amount] = spender
          if not ownerOf[amount]:
              revert with 0, 'ERC721: owner query for nonexistent token'
  else:
      mem[96] = calldata.size
      mem[128 len calldata.size] = call.data[0 len calldata.size]
      if mem[calldata.size + 108 len 20] != ownerOf[amount]:
          if this.address != caller:
              static call proxyRegistryAddress.proxies(address ) with:
                      gas gas_remaining wei
                     args ownerOf[amount]
              if not ext_call.success:
                  revert with ext_call.return_data[0 len return_data.size]
              require return_data.size >=′ 32
              require ext_call.return_data[0] == ext_call.return_data[12 len 20]
              if ext_call.return_data[12 len 20] != caller:
                  if not stor5[stor2[amount]][caller]:
                      revert with 0, 'ERC721: approve caller is not owner nor approved for all'
          else:
              mem[ceil32(calldata.size) + 128] = calldata.size
              mem[ceil32(calldata.size) + 160 len calldata.size] = call.data[0 len calldata.size]
              static call proxyRegistryAddress.proxies(address ) with:
                      gas gas_remaining wei
                     args ownerOf[amount]
              if not ext_call.success:
                  revert with ext_call.return_data[0 len return_data.size]
              require return_data.size >=′ 32
              require ext_call.return_data[0] == ext_call.return_data[12 len 20]
              if ext_call.return_data[12 len 20] != mem[ceil32(calldata.size) + calldata.size + 140 len 20]:
                  if not stor5[stor2[amount]][address(mem[ceil32(calldata.size) + calldata.size + 128])]:
                      revert with 0, 'ERC721: approve caller is not owner nor approved for all'
      approved[amount] = spender
      if not ownerOf[amount]:
          revert with 0, 'ERC721: owner query for nonexistent token'
  ('bool', ('stor', ('map', ('param', 'amount'), ('name', 'ownerOf', 2))))
  log Approval(
        address owner=ownerOf[amount],
        address spender=spender,
        uint256 value=amount)

def mintTo(address _to): # not payable
  require calldata.size - 4 >=′ 32
  require _to == _to
  if this.address != caller:
      if owner != caller:
          revert with 0, 'Ownable: caller is not the owner'
      stor10++
      if not _to:
          revert with 0, 'ERC721: mint to the zero address'
      if ownerOf[stor10]:
          revert with 0, 'ERC721: token already minted'
      if balanceOf[address(_to)] > -2:
          revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
      balanceOf[address(_to)]++
      ownerOf[stor10] = _to
      log Transfer(
            address from=0,
            address to=_to,
            uint256 value=stor10)
      if ext_code.size(_to) > 0:
          if this.address != caller:
              call _to.onERC721Received(address , address , uint256 , bytes ) with:
                   gas gas_remaining wei
                  args 0, uint32(caller), 0, stor10, 128, 0
          else:
              mem[128] = calldata.size
              mem[160 len calldata.size] = call.data[0 len calldata.size]
              call _to.onERC721Received(address , address , uint256 , bytes ) with:
                   gas gas_remaining wei
                  args mem[calldata.size + 140 len 20], 0, stor10, 128, 0
          if not ext_call.success:
              if not return_data.size:
                  revert with 0, 'ERC721: transfer to non ERC721Receiver implementer'
              if not return_data.size:
                  revert with 0, 'ERC721: transfer to non ERC721Receiver implementer'
              revert with ext_call.return_data[0 len return_data.size]
          require return_data.size >=′ 32
          require ext_call.return_data[0] == Mask(32, 224, ext_call.return_data[0])
          if Mask(32, 224, ext_call.return_data[0]) != 0x150b7a0200000000000000000000000000000000000000000000000000000000:
              revert with 0, 'ERC721: transfer to non ERC721Receiver implementer'
  else:
      mem[96] = calldata.size
      mem[128 len calldata.size] = call.data[0 len calldata.size]
      if owner != mem[calldata.size + 108 len 20]:
          revert with 0, 'Ownable: caller is not the owner'
      stor10++
      if not _to:
          revert with 0, 'ERC721: mint to the zero address'
      if ownerOf[stor10]:
          revert with 0, 'ERC721: token already minted'
      if balanceOf[address(_to)] > -2:
          revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
      balanceOf[address(_to)]++
      ownerOf[stor10] = _to
      log Transfer(
            address from=0,
            address to=_to,
            uint256 value=stor10)
      if ext_code.size(_to) > 0:
          if this.address != caller:
              call _to.onERC721Received(address , address , uint256 , bytes ) with:
                   gas gas_remaining wei
                  args caller, 0, stor10, 128, 0
          else:
              mem[ceil32(calldata.size) + 160] = calldata.size
              mem[ceil32(calldata.size) + 192 len calldata.size] = call.data[0 len calldata.size]
              mem[(2 * ceil32(calldata.size)) + 228] = 0
              mem[(2 * ceil32(calldata.size)) + 260] = stor10
              mem[(2 * ceil32(calldata.size)) + 292] = 128
              mem[(2 * ceil32(calldata.size)) + 324] = 0
              mem[(2 * ceil32(calldata.size)) + 356 len 0] = None
              call _to.onERC721Received(address , address , uint256 , bytes ) with:
                   gas gas_remaining wei
                  args mem[ceil32(calldata.size) + calldata.size + 172 len 20], 0, stor10, 128, 0
          if not ext_call.success:
              if not return_data.size:
                  if not calldata.size:
                      revert with 0, 'ERC721: transfer to non ERC721Receiver implementer'
                  revert with call.data[0 len calldata.size]
              if not return_data.size:
                  revert with 0, 'ERC721: transfer to non ERC721Receiver implementer'
              revert with ext_call.return_data[0 len return_data.size]
          require return_data.size >=′ 32
          require ext_call.return_data[0] == Mask(32, 224, ext_call.return_data[0])
          if Mask(32, 224, ext_call.return_data[0]) != 0x150b7a0200000000000000000000000000000000000000000000000000000000:
              revert with 0, 'ERC721: transfer to non ERC721Receiver implementer'

def transferFrom(address sender, address recipient, uint256 amount): # not payable
  require calldata.size - 4 >=′ 96
  require sender == sender
  require recipient == recipient
  require amount == amount
  if this.address != caller:
      if not ownerOf[amount]:
          revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: operator query for nonexistent token'
      if not ownerOf[amount]:
          revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: owner query for nonexistent token'
      if caller == ownerOf[amount]:
          if not ownerOf[amount]:
              revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: owner query for nonexistent token'
          if ownerOf[amount] != sender:
              revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: transfer from incorrect owner'
          if not recipient:
              revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: transfer to the zero address'
          approved[amount] = 0
          if not ownerOf[amount]:
              revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: owner query for nonexistent token'
      else:
          if not ownerOf[amount]:
              revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: approved query for nonexistent token'
          if approved[amount] == caller:
              if not ownerOf[amount]:
                  revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: owner query for nonexistent token'
              if ownerOf[amount] != sender:
                  revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: transfer from incorrect owner'
              if not recipient:
                  revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: transfer to the zero address'
              approved[amount] = 0
              if not ownerOf[amount]:
                  revert with 0x8c379a000000000000000000000000000000000000000000000000000000000, 'ERC721: owner query for nonexistent token'
          else:
              static call proxyRegistryAddress.proxies(address ) with:
                      gas gas_remaining wei
                     args ownerOf[amount]
              if not ext_call.success:
                  revert with ext_call.return_data[0 len return_data.size]
              require return_data.size >=′ 32
              require ext_call.return_data[0] == ext_call.return_data[12 len 20]
              if ext_call.return_data[12 len 20] != caller:
                  if not stor5[stor2[amount]][caller]:
                      revert with 0, 'ERC721: transfer caller is not owner nor approved'
              if not ownerOf[amount]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              if ownerOf[amount] != sender:
                  revert with 0, 'ERC721: transfer from incorrect owner'
              if not recipient:
                  revert with 0, 'ERC721: transfer to the zero address'
              approved[amount] = 0
              if not ownerOf[amount]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
  else:
      mem[96] = calldata.size
      mem[128 len calldata.size] = call.data[0 len calldata.size]
      if not ownerOf[amount]:
          revert with 0, 'ERC721: operator query for nonexistent token'
      if not ownerOf[amount]:
          revert with 0, 'ERC721: owner query for nonexistent token'
      if mem[calldata.size + 108 len 20] != ownerOf[amount]:
          if not ownerOf[amount]:
              revert with 0, 'ERC721: approved query for nonexistent token'
          if approved[amount] != mem[calldata.size + 108 len 20]:
              static call proxyRegistryAddress.proxies(address ) with:
                      gas gas_remaining wei
                     args ownerOf[amount]
              if not ext_call.success:
                  revert with ext_call.return_data[0 len return_data.size]
              require return_data.size >=′ 32
              require ext_call.return_data[0] == ext_call.return_data[12 len 20]
              if ext_call.return_data[12 len 20] != mem[calldata.size + 108 len 20]:
                  if not stor5[stor2[amount]][address(mem[calldata.size + 96])]:
                      revert with 0, 'ERC721: transfer caller is not owner nor approved'
      if not ownerOf[amount]:
          revert with 0, 'ERC721: owner query for nonexistent token'
      if ownerOf[amount] != sender:
          revert with 0, 'ERC721: transfer from incorrect owner'
      if not recipient:
          revert with 0, 'ERC721: transfer to the zero address'
      approved[amount] = 0
      if not ownerOf[amount]:
          revert with 0, 'ERC721: owner query for nonexistent token'
  ('bool', ('stor', ('map', ('param', 'amount'), ('name', 'ownerOf', 2))))
  log Approval(
        address owner=ownerOf[amount],
        address spender=0,
        uint256 value=amount)
  if balanceOf[address(sender)] < 1:
      revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
  balanceOf[address(sender)]--
  if balanceOf[address(recipient)] > -2:
      revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
  balanceOf[address(recipient)]++
  ownerOf[amount] = recipient
  log Transfer(
        address from=sender,
        address to=recipient,
        uint256 value=amount)

def name(): # not payable
  if bool(stor0.length):
      if bool(stor0.length) == stor0.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if bool(stor0.length):
          if bool(stor0.length) == stor0.length.field_1 < 32:
              revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
          if stor0.length.field_1:
              if 31 < stor0.length.field_1:
                  mem[128] = uint256(stor0.field_0)
                  idx = 128
                  s = 0
                  while stor0.length.field_1 + 96 > idx:
                      mem[idx + 32] = stor0[s].field_256
                      idx = idx + 32
                      s = s + 1
                      continue 
                  return Array(len=2 * Mask(256, -1, stor0.length.field_1), data=mem[128 len ceil32(stor0.length.field_1)])
              mem[128] = 256 * stor0.length.field_8
      else:
          if bool(stor0.length) == stor0.length.field_1 < 32:
              revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
          if stor0.length.field_1:
              if 31 < stor0.length.field_1:
                  mem[128] = uint256(stor0.field_0)
                  idx = 128
                  s = 0
                  while stor0.length.field_1 + 96 > idx:
                      mem[idx + 32] = stor0[s].field_256
                      idx = idx + 32
                      s = s + 1
                      continue 
                  return Array(len=2 * Mask(256, -1, stor0.length.field_1), data=mem[128 len ceil32(stor0.length.field_1)])
              mem[128] = 256 * stor0.length.field_8
      mem[ceil32(stor0.length.field_1) + 192 len ceil32(stor0.length.field_1)] = mem[128 len ceil32(stor0.length.field_1)]
      if ceil32(stor0.length.field_1) > stor0.length.field_1:
          mem[ceil32(stor0.length.field_1) + stor0.length.field_1 + 192] = 0
      return Array(len=2 * Mask(256, -1, stor0.length.field_1), data=mem[128 len ceil32(stor0.length.field_1)], mem[(2 * ceil32(stor0.length.field_1)) + 192 len 2 * ceil32(stor0.length.field_1)]), 
  if bool(stor0.length) == stor0.length.field_1 < 32:
      revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
  if bool(stor0.length):
      if bool(stor0.length) == stor0.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if stor0.length.field_1:
          if 31 < stor0.length.field_1:
              mem[128] = uint256(stor0.field_0)
              idx = 128
              s = 0
              while stor0.length.field_1 + 96 > idx:
                  mem[idx + 32] = stor0[s].field_256
                  idx = idx + 32
                  s = s + 1
                  continue 
              return Array(len=stor0.length % 128, data=mem[128 len ceil32(stor0.length.field_1)])
          mem[128] = 256 * stor0.length.field_8
  else:
      if bool(stor0.length) == stor0.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if stor0.length.field_1:
          if 31 < stor0.length.field_1:
              mem[128] = uint256(stor0.field_0)
              idx = 128
              s = 0
              while stor0.length.field_1 + 96 > idx:
                  mem[idx + 32] = stor0[s].field_256
                  idx = idx + 32
                  s = s + 1
                  continue 
              return Array(len=stor0.length % 128, data=mem[128 len ceil32(stor0.length.field_1)])
          mem[128] = 256 * stor0.length.field_8
  mem[ceil32(stor0.length.field_1) + 192 len ceil32(stor0.length.field_1)] = mem[128 len ceil32(stor0.length.field_1)]
  if ceil32(stor0.length.field_1) > stor0.length.field_1:
      mem[ceil32(stor0.length.field_1) + stor0.length.field_1 + 192] = 0
  return Array(len=stor0.length % 128, data=mem[128 len ceil32(stor0.length.field_1)], mem[(2 * ceil32(stor0.length.field_1)) + 192 len 2 * ceil32(stor0.length.field_1)]), 

def symbol(): # not payable
  if bool(stor1.length):
      if bool(stor1.length) == stor1.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if bool(stor1.length):
          if bool(stor1.length) == stor1.length.field_1 < 32:
              revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
          if stor1.length.field_1:
              if 31 < stor1.length.field_1:
                  mem[128] = uint256(stor1.field_0)
                  idx = 128
                  s = 0
                  while stor1.length.field_1 + 96 > idx:
                      mem[idx + 32] = stor1[s].field_256
                      idx = idx + 32
                      s = s + 1
                      continue 
                  return Array(len=2 * Mask(256, -1, stor1.length.field_1), data=mem[128 len ceil32(stor1.length.field_1)])
              mem[128] = 256 * stor1.length.field_8
      else:
          if bool(stor1.length) == stor1.length.field_1 < 32:
              revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
          if stor1.length.field_1:
              if 31 < stor1.length.field_1:
                  mem[128] = uint256(stor1.field_0)
                  idx = 128
                  s = 0
                  while stor1.length.field_1 + 96 > idx:
                      mem[idx + 32] = stor1[s].field_256
                      idx = idx + 32
                      s = s + 1
                      continue 
                  return Array(len=2 * Mask(256, -1, stor1.length.field_1), data=mem[128 len ceil32(stor1.length.field_1)])
              mem[128] = 256 * stor1.length.field_8
      mem[ceil32(stor1.length.field_1) + 192 len ceil32(stor1.length.field_1)] = mem[128 len ceil32(stor1.length.field_1)]
      if ceil32(stor1.length.field_1) > stor1.length.field_1:
          mem[ceil32(stor1.length.field_1) + stor1.length.field_1 + 192] = 0
      return Array(len=2 * Mask(256, -1, stor1.length.field_1), data=mem[128 len ceil32(stor1.length.field_1)], mem[(2 * ceil32(stor1.length.field_1)) + 192 len 2 * ceil32(stor1.length.field_1)]), 
  if bool(stor1.length) == stor1.length.field_1 < 32:
      revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
  if bool(stor1.length):
      if bool(stor1.length) == stor1.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if stor1.length.field_1:
          if 31 < stor1.length.field_1:
              mem[128] = uint256(stor1.field_0)
              idx = 128
              s = 0
              while stor1.length.field_1 + 96 > idx:
                  mem[idx + 32] = stor1[s].field_256
                  idx = idx + 32
                  s = s + 1
                  continue 
              return Array(len=stor1.length % 128, data=mem[128 len ceil32(stor1.length.field_1)])
          mem[128] = 256 * stor1.length.field_8
  else:
      if bool(stor1.length) == stor1.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if stor1.length.field_1:
          if 31 < stor1.length.field_1:
              mem[128] = uint256(stor1.field_0)
              idx = 128
              s = 0
              while stor1.length.field_1 + 96 > idx:
                  mem[idx + 32] = stor1[s].field_256
                  idx = idx + 32
                  s = s + 1
                  continue 
              return Array(len=stor1.length % 128, data=mem[128 len ceil32(stor1.length.field_1)])
          mem[128] = 256 * stor1.length.field_8
  mem[ceil32(stor1.length.field_1) + 192 len ceil32(stor1.length.field_1)] = mem[128 len ceil32(stor1.length.field_1)]
  if ceil32(stor1.length.field_1) > stor1.length.field_1:
      mem[ceil32(stor1.length.field_1) + stor1.length.field_1 + 192] = 0
  return Array(len=stor1.length % 128, data=mem[128 len ceil32(stor1.length.field_1)], mem[(2 * ceil32(stor1.length.field_1)) + 192 len 2 * ceil32(stor1.length.field_1)]), 

def abii(): # not payable
  if bool(stor15.length):
      if bool(stor15.length) == stor15.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if bool(stor15.length):
          if bool(stor15.length) == stor15.length.field_1 < 32:
              revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
          if stor15.length.field_1:
              if 31 < stor15.length.field_1:
                  mem[128] = uint256(stor15.field_0)
                  idx = 128
                  s = 0
                  while stor15.length.field_1 + 96 > idx:
                      mem[idx + 32] = stor15[s].field_256
                      idx = idx + 32
                      s = s + 1
                      continue 
                  return Array(len=2 * Mask(256, -1, stor15.length.field_1), data=mem[128 len ceil32(stor15.length.field_1)])
              mem[128] = 256 * stor15.length.field_8
      else:
          if bool(stor15.length) == stor15.length.field_1 < 32:
              revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
          if stor15.length.field_1:
              if 31 < stor15.length.field_1:
                  mem[128] = uint256(stor15.field_0)
                  idx = 128
                  s = 0
                  while stor15.length.field_1 + 96 > idx:
                      mem[idx + 32] = stor15[s].field_256
                      idx = idx + 32
                      s = s + 1
                      continue 
                  return Array(len=2 * Mask(256, -1, stor15.length.field_1), data=mem[128 len ceil32(stor15.length.field_1)])
              mem[128] = 256 * stor15.length.field_8
      mem[ceil32(stor15.length.field_1) + 192 len ceil32(stor15.length.field_1)] = mem[128 len ceil32(stor15.length.field_1)]
      if ceil32(stor15.length.field_1) > stor15.length.field_1:
          mem[ceil32(stor15.length.field_1) + stor15.length.field_1 + 192] = 0
      return Array(len=2 * Mask(256, -1, stor15.length.field_1), data=mem[128 len ceil32(stor15.length.field_1)], mem[(2 * ceil32(stor15.length.field_1)) + 192 len 2 * ceil32(stor15.length.field_1)]), 
  if bool(stor15.length) == stor15.length.field_1 < 32:
      revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
  if bool(stor15.length):
      if bool(stor15.length) == stor15.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if stor15.length.field_1:
          if 31 < stor15.length.field_1:
              mem[128] = uint256(stor15.field_0)
              idx = 128
              s = 0
              while stor15.length.field_1 + 96 > idx:
                  mem[idx + 32] = stor15[s].field_256
                  idx = idx + 32
                  s = s + 1
                  continue 
              return Array(len=stor15.length % 128, data=mem[128 len ceil32(stor15.length.field_1)])
          mem[128] = 256 * stor15.length.field_8
  else:
      if bool(stor15.length) == stor15.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if stor15.length.field_1:
          if 31 < stor15.length.field_1:
              mem[128] = uint256(stor15.field_0)
              idx = 128
              s = 0
              while stor15.length.field_1 + 96 > idx:
                  mem[idx + 32] = stor15[s].field_256
                  idx = idx + 32
                  s = s + 1
                  continue 
              return Array(len=stor15.length % 128, data=mem[128 len ceil32(stor15.length.field_1)])
          mem[128] = 256 * stor15.length.field_8
  mem[ceil32(stor15.length.field_1) + 192 len ceil32(stor15.length.field_1)] = mem[128 len ceil32(stor15.length.field_1)]
  if ceil32(stor15.length.field_1) > stor15.length.field_1:
      mem[ceil32(stor15.length.field_1) + stor15.length.field_1 + 192] = 0
  return Array(len=stor15.length % 128, data=mem[128 len ceil32(stor15.length.field_1)], mem[(2 * ceil32(stor15.length.field_1)) + 192 len 2 * ceil32(stor15.length.field_1)]), 

def baseTokenURI(): # not payable
  if bool(stor16.length):
      if bool(stor16.length) == stor16.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if bool(stor16.length):
          if bool(stor16.length) == stor16.length.field_1 < 32:
              revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
          if stor16.length.field_1:
              if 31 < stor16.length.field_1:
                  mem[128] = uint256(stor16.field_0)
                  idx = 128
                  s = 0
                  while stor16.length.field_1 + 96 > idx:
                      mem[idx + 32] = stor16[s].field_256
                      idx = idx + 32
                      s = s + 1
                      continue 
                  return Array(len=2 * Mask(256, -1, stor16.length.field_1), data=mem[128 len ceil32(stor16.length.field_1)])
              mem[128] = 256 * stor16.length.field_8
      else:
          if bool(stor16.length) == stor16.length.field_1 < 32:
              revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
          if stor16.length.field_1:
              if 31 < stor16.length.field_1:
                  mem[128] = uint256(stor16.field_0)
                  idx = 128
                  s = 0
                  while stor16.length.field_1 + 96 > idx:
                      mem[idx + 32] = stor16[s].field_256
                      idx = idx + 32
                      s = s + 1
                      continue 
                  return Array(len=2 * Mask(256, -1, stor16.length.field_1), data=mem[128 len ceil32(stor16.length.field_1)])
              mem[128] = 256 * stor16.length.field_8
      mem[ceil32(stor16.length.field_1) + 192 len ceil32(stor16.length.field_1)] = mem[128 len ceil32(stor16.length.field_1)]
      if ceil32(stor16.length.field_1) > stor16.length.field_1:
          mem[ceil32(stor16.length.field_1) + stor16.length.field_1 + 192] = 0
      return Array(len=2 * Mask(256, -1, stor16.length.field_1), data=mem[128 len ceil32(stor16.length.field_1)], mem[(2 * ceil32(stor16.length.field_1)) + 192 len 2 * ceil32(stor16.length.field_1)]), 
  if bool(stor16.length) == stor16.length.field_1 < 32:
      revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
  if bool(stor16.length):
      if bool(stor16.length) == stor16.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if stor16.length.field_1:
          if 31 < stor16.length.field_1:
              mem[128] = uint256(stor16.field_0)
              idx = 128
              s = 0
              while stor16.length.field_1 + 96 > idx:
                  mem[idx + 32] = stor16[s].field_256
                  idx = idx + 32
                  s = s + 1
                  continue 
              return Array(len=stor16.length % 128, data=mem[128 len ceil32(stor16.length.field_1)])
          mem[128] = 256 * stor16.length.field_8
  else:
      if bool(stor16.length) == stor16.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if stor16.length.field_1:
          if 31 < stor16.length.field_1:
              mem[128] = uint256(stor16.field_0)
              idx = 128
              s = 0
              while stor16.length.field_1 + 96 > idx:
                  mem[idx + 32] = stor16[s].field_256
                  idx = idx + 32
                  s = s + 1
                  continue 
              return Array(len=stor16.length % 128, data=mem[128 len ceil32(stor16.length.field_1)])
          mem[128] = 256 * stor16.length.field_8
  mem[ceil32(stor16.length.field_1) + 192 len ceil32(stor16.length.field_1)] = mem[128 len ceil32(stor16.length.field_1)]
  if ceil32(stor16.length.field_1) > stor16.length.field_1:
      mem[ceil32(stor16.length.field_1) + stor16.length.field_1 + 192] = 0
  return Array(len=stor16.length % 128, data=mem[128 len ceil32(stor16.length.field_1)], mem[(2 * ceil32(stor16.length.field_1)) + 192 len 2 * ceil32(stor16.length.field_1)]), 

def tokenURI(uint256 tokenId): # not payable
  require calldata.size - 4 >=′ 32
  require tokenId == tokenId
  if bool(stor16.length):
      if bool(stor16.length) == stor16.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
  else:
      if bool(stor16.length) == stor16.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
  if bool(stor16.length):
      if bool(stor16.length) == stor16.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if not stor16.length.field_1:
          if tokenId:
              s = 0
              idx = tokenId
              while idx:
                  if s == -1:
                      revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                  s = s + 1
                  idx = idx / 10
                  continue 
              if s > LOCK8605463013():
                  revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
              if not s:
                  if tokenId:
                      if s < 1:
                          revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                      if 48 > -(tokenId % 10) - 1:
                          revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                      if s - 1 >= s:
                          revert with Panic(50)  # If you access an array, bytesN or an array slice at an out-of-bounds or negative index (i.e. x[i] where i >= x.length or i < 0).
              else:
                  if tokenId:
                      if s < 1:
                          revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                      if 48 > -(tokenId % 10) - 1:
                          revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
      else:
          if 31 < stor16.length.field_1:
              idx = 128
              s = 0
              while stor16.length.field_1 + 96 > idx:
                  mem[idx + 32] = stor16[s].field_256
                  idx = idx + 32
                  s = s + 1
                  continue 
          else:
              if tokenId:
                  s = 0
                  idx = tokenId
                  while idx:
                      if s == -1:
                          revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                      s = s + 1
                      idx = idx / 10
                      continue 
                  if s > LOCK8605463013():
                      revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
                  if not s:
                      if tokenId:
                          if s < 1:
                              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                          if 48 > -(tokenId % 10) - 1:
                              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                          if s - 1 >= s:
                              revert with Panic(50)  # If you access an array, bytesN or an array slice at an out-of-bounds or negative index (i.e. x[i] where i >= x.length or i < 0).
                  else:
                      if tokenId:
                          if s < 1:
                              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                          if 48 > -(tokenId % 10) - 1:
                              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
  else:
      if bool(stor16.length) == stor16.length.field_1 < 32:
          revert with Panic(34)  # If you access a storage byte array that is incorrectly encoded.
      if not stor16.length.field_1:
          if tokenId:
              s = 0
              idx = tokenId
              while idx:
                  if s == -1:
                      revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                  s = s + 1
                  idx = idx / 10
                  continue 
              if s > LOCK8605463013():
                  revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
              if not s:
                  if tokenId:
                      if s < 1:
                          revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                      if 48 > -(tokenId % 10) - 1:
                          revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                      if s - 1 >= s:
                          revert with Panic(50)  # If you access an array, bytesN or an array slice at an out-of-bounds or negative index (i.e. x[i] where i >= x.length or i < 0).
              else:
                  if tokenId:
                      if s < 1:
                          revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                      if 48 > -(tokenId % 10) - 1:
                          revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
      else:
          if 31 < stor16.length.field_1:
              idx = 128
              s = 0
              while stor16.length.field_1 + 96 > idx:
                  mem[idx + 32] = stor16[s].field_256
                  idx = idx + 32
                  s = s + 1
                  continue 
          else:
              if tokenId:
                  s = 0
                  idx = tokenId
                  while idx:
                      if s == -1:
                          revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                      s = s + 1
                      idx = idx / 10
                      continue 
                  if s > LOCK8605463013():
                      revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
                  if not s:
                      if tokenId:
                          if s < 1:
                              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                          if 48 > -(tokenId % 10) - 1:
                              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                          if s - 1 >= s:
                              revert with Panic(50)  # If you access an array, bytesN or an array slice at an out-of-bounds or negative index (i.e. x[i] where i >= x.length or i < 0).
                  else:
                      if tokenId:
                          if s < 1:
                              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
                          if 48 > -(tokenId % 10) - 1:
                              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
  ...  # Decompilation aborted, sorry: ("decompilation didn't finish",)

def safeTransferFrom(address from, address to, uint256 tokenId): # not payable
  require calldata.size - 4 >=′ 96
  require from == from
  require to == to
  require tokenId == tokenId
  if this.address != caller:
      if not ownerOf[tokenId]:
          revert with 0, 'ERC721: operator query for nonexistent token'
      if not ownerOf[tokenId]:
          revert with 0, 'ERC721: owner query for nonexistent token'
      if caller == ownerOf[tokenId]:
          if not ownerOf[tokenId]:
              revert with 0, 'ERC721: owner query for nonexistent token'
          if ownerOf[tokenId] != from:
              revert with 0, 'ERC721: transfer from incorrect owner'
          if not to:
              revert with 0, 'ERC721: transfer to the zero address'
          approved[tokenId] = 0
          if not ownerOf[tokenId]:
              revert with 0, 'ERC721: owner query for nonexistent token'
          log Approval(
                address owner=ownerOf[tokenId],
                address spender=0,
                uint256 value=tokenId)
          if balanceOf[address(from)] < 1:
              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
          balanceOf[address(from)]--
          if balanceOf[address(to)] > -2:
              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
          balanceOf[address(to)]++
          ownerOf[tokenId] = to
          log Transfer(
                address from=from,
                address to=to,
                uint256 value=tokenId)
          if ext_code.size(to) <= 0:
              stop
          if this.address != caller:
              call to.onERC721Received(address , address , uint256 , bytes ) with:
                   gas gas_remaining wei
                  args 0, uint32(caller), address(from), tokenId, 128, 0
          else:
              mem[128] = calldata.size
              mem[160 len calldata.size] = call.data[0 len calldata.size]
              call to.onERC721Received(address , address , uint256 , bytes ) with:
                   gas gas_remaining wei
                  args mem[calldata.size + 140 len 20], address(from), tokenId, 128, 0
      else:
          if not ownerOf[tokenId]:
              revert with 0, 'ERC721: approved query for nonexistent token'
          if approved[tokenId] == caller:
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              if ownerOf[tokenId] != from:
                  revert with 0, 'ERC721: transfer from incorrect owner'
              if not to:
                  revert with 0, 'ERC721: transfer to the zero address'
              approved[tokenId] = 0
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              log Approval(
                    address owner=ownerOf[tokenId],
                    address spender=0,
                    uint256 value=tokenId)
              if balanceOf[address(from)] < 1:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(from)]--
              if balanceOf[address(to)] > -2:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(to)]++
              ownerOf[tokenId] = to
              log Transfer(
                    address from=from,
                    address to=to,
                    uint256 value=tokenId)
              if ext_code.size(to) <= 0:
                  stop
              if this.address != caller:
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args 0, uint32(caller), address(from), tokenId, 128, 0
              else:
                  mem[128] = calldata.size
                  mem[160 len calldata.size] = call.data[0 len calldata.size]
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args mem[calldata.size + 140 len 20], address(from), tokenId, 128, 0
          else:
              mem[132] = ownerOf[tokenId]
              static call proxyRegistryAddress.proxies(address ) with:
                      gas gas_remaining wei
                     args ownerOf[tokenId]
              if not ext_call.success:
                  revert with ext_call.return_data[0 len return_data.size]
              require return_data.size >=′ 32
              require ext_call.return_data[0] == ext_call.return_data[12 len 20]
              if ext_call.return_data[12 len 20] != caller:
                  if not stor5[stor2[tokenId]][caller]:
                      revert with 0, 'ERC721: transfer caller is not owner nor approved'
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              if ownerOf[tokenId] != from:
                  revert with 0, 'ERC721: transfer from incorrect owner'
              if not to:
                  revert with 0, 'ERC721: transfer to the zero address'
              approved[tokenId] = 0
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              log Approval(
                    address owner=ownerOf[tokenId],
                    address spender=0,
                    uint256 value=tokenId)
              if balanceOf[address(from)] < 1:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(from)]--
              if balanceOf[address(to)] > -2:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(to)]++
              ownerOf[tokenId] = to
              log Transfer(
                    address from=from,
                    address to=to,
                    uint256 value=tokenId)
              if ext_code.size(to) <= 0:
                  stop
              if this.address != caller:
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args caller, address(from), tokenId, 128, 0
              else:
                  mem[ceil32(return_data.size) + 128] = calldata.size
                  mem[ceil32(return_data.size) + 160 len calldata.size] = call.data[0 len calldata.size]
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args mem[ceil32(return_data.size) + calldata.size + 140 len 20], address(from), tokenId, 128, 0
  else:
      mem[128] = calldata.size
      mem[160 len calldata.size] = call.data[0 len calldata.size]
      if not ownerOf[tokenId]:
          revert with 0, 'ERC721: operator query for nonexistent token'
      if not ownerOf[tokenId]:
          revert with 0, 'ERC721: owner query for nonexistent token'
      if mem[calldata.size + 140 len 20] == ownerOf[tokenId]:
          if not ownerOf[tokenId]:
              revert with 0, 'ERC721: owner query for nonexistent token'
          if ownerOf[tokenId] != from:
              revert with 0, 'ERC721: transfer from incorrect owner'
          if not to:
              revert with 0, 'ERC721: transfer to the zero address'
          approved[tokenId] = 0
          if not ownerOf[tokenId]:
              revert with 0, 'ERC721: owner query for nonexistent token'
          log Approval(
                address owner=ownerOf[tokenId],
                address spender=0,
                uint256 value=tokenId)
          if balanceOf[address(from)] < 1:
              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
          balanceOf[address(from)]--
          if balanceOf[address(to)] > -2:
              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
          balanceOf[address(to)]++
          ownerOf[tokenId] = to
          log Transfer(
                address from=from,
                address to=to,
                uint256 value=tokenId)
          if ext_code.size(to) <= 0:
              stop
          if this.address != caller:
              call to.onERC721Received(address , address , uint256 , bytes ) with:
                   gas gas_remaining wei
                  args caller, address(from), tokenId, 128, 0
          else:
              mem[ceil32(calldata.size) + 160] = calldata.size
              mem[ceil32(calldata.size) + 192 len calldata.size] = call.data[0 len calldata.size]
              call to.onERC721Received(address , address , uint256 , bytes ) with:
                   gas gas_remaining wei
                  args mem[ceil32(calldata.size) + calldata.size + 172 len 20], address(from), tokenId, 128, 0
      else:
          if not ownerOf[tokenId]:
              revert with 0, 'ERC721: approved query for nonexistent token'
          if approved[tokenId] == mem[calldata.size + 140 len 20]:
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              if ownerOf[tokenId] != from:
                  revert with 0, 'ERC721: transfer from incorrect owner'
              if not to:
                  revert with 0, 'ERC721: transfer to the zero address'
              approved[tokenId] = 0
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              log Approval(
                    address owner=ownerOf[tokenId],
                    address spender=0,
                    uint256 value=tokenId)
              if balanceOf[address(from)] < 1:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(from)]--
              if balanceOf[address(to)] > -2:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(to)]++
              ownerOf[tokenId] = to
              log Transfer(
                    address from=from,
                    address to=to,
                    uint256 value=tokenId)
              if ext_code.size(to) <= 0:
                  stop
              if this.address != caller:
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args caller, address(from), tokenId, 128, 0
              else:
                  mem[ceil32(calldata.size) + 160] = calldata.size
                  mem[ceil32(calldata.size) + 192 len calldata.size] = call.data[0 len calldata.size]
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args mem[ceil32(calldata.size) + calldata.size + 172 len 20], address(from), tokenId, 128, 0
          else:
              mem[ceil32(calldata.size) + 164] = ownerOf[tokenId]
              static call proxyRegistryAddress.proxies(address ) with:
                      gas gas_remaining wei
                     args ownerOf[tokenId]
              if not ext_call.success:
                  revert with ext_call.return_data[0 len return_data.size]
              require return_data.size >=′ 32
              require ext_call.return_data[0] == ext_call.return_data[12 len 20]
              if ext_call.return_data[12 len 20] != mem[calldata.size + 140 len 20]:
                  if not stor5[stor2[tokenId]][address(mem[calldata.size + 128])]:
                      revert with 0, 'ERC721: transfer caller is not owner nor approved'
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              if ownerOf[tokenId] != from:
                  revert with 0, 'ERC721: transfer from incorrect owner'
              if not to:
                  revert with 0, 'ERC721: transfer to the zero address'
              approved[tokenId] = 0
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              log Approval(
                    address owner=ownerOf[tokenId],
                    address spender=0,
                    uint256 value=tokenId)
              if balanceOf[address(from)] < 1:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(from)]--
              if balanceOf[address(to)] > -2:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(to)]++
              ownerOf[tokenId] = to
              log Transfer(
                    address from=from,
                    address to=to,
                    uint256 value=tokenId)
              if ext_code.size(to) <= 0:
                  stop
              if this.address != caller:
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args caller, address(from), tokenId, 128, 0
              else:
                  mem[ceil32(calldata.size) + ceil32(return_data.size) + 160] = calldata.size
                  mem[ceil32(calldata.size) + ceil32(return_data.size) + 192 len calldata.size] = call.data[0 len calldata.size]
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args mem[ceil32(calldata.size) + ceil32(return_data.size) + calldata.size + 172 len 20], address(from), tokenId, 128, 0
  if not ext_call.success:
      if return_data.size:
          if return_data.size:
              revert with ext_call.return_data[0 len return_data.size]
  else:
      require return_data.size >=′ 32
      require ext_call.return_data[0] == Mask(32, 224, ext_call.return_data[0])
  ...  # Decompilation aborted, sorry: ("decompilation didn't finish",)

def safeTransferFrom(address from, address to, uint256 tokenId, bytes _data): # not payable
  require calldata.size - 4 >=′ 128
  require from == from
  require to == to
  require tokenId == tokenId
  require _data <= LOCK8605463013()
  require _data + 35 <′ calldata.size
  if _data.length > LOCK8605463013():
      revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
  if ceil32(ceil32(_data.length)) + 97 > LOCK8605463013() or ceil32(ceil32(_data.length)) + 97 < 96:
      revert with Panic(65)  # If you allocate too much memory or create an array that is too large.
  require _data + _data.length + 36 <= calldata.size
  mem[128 len _data.length] = _data[all]
  mem[_data.length + 128] = 0
  if this.address != caller:
      if not ownerOf[tokenId]:
          revert with 0, 'ERC721: operator query for nonexistent token'
      if not ownerOf[tokenId]:
          revert with 0, 'ERC721: owner query for nonexistent token'
      if caller == ownerOf[tokenId]:
          if not ownerOf[tokenId]:
              revert with 0, 'ERC721: owner query for nonexistent token'
          if ownerOf[tokenId] != from:
              revert with 0, 'ERC721: transfer from incorrect owner'
          if not to:
              revert with 0, 'ERC721: transfer to the zero address'
          approved[tokenId] = 0
          if not ownerOf[tokenId]:
              revert with 0, 'ERC721: owner query for nonexistent token'
          log Approval(
                address owner=ownerOf[tokenId],
                address spender=0,
                uint256 value=tokenId)
          if balanceOf[address(from)] < 1:
              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
          balanceOf[address(from)]--
          if balanceOf[address(to)] > -2:
              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
          balanceOf[address(to)]++
          ownerOf[tokenId] = to
          log Transfer(
                address from=from,
                address to=to,
                uint256 value=tokenId)
          if ext_code.size(to) <= 0:
              stop
          if this.address != caller:
              call to.onERC721Received(address , address , uint256 , bytes ) with:
                   gas gas_remaining wei
                  args caller, address(from), tokenId, Array(len=_data.length, data=_data[all])
          else:
              mem[ceil32(ceil32(_data.length)) + 97] = calldata.size
              mem[ceil32(ceil32(_data.length)) + 129 len calldata.size] = call.data[0 len calldata.size]
              call to.onERC721Received(address , address , uint256 , bytes ) with:
                   gas gas_remaining wei
                  args mem[ceil32(ceil32(_data.length)) + calldata.size + 109 len 20], address(from), tokenId, Array(len=_data.length, data=_data[all])
      else:
          if not ownerOf[tokenId]:
              revert with 0, 'ERC721: approved query for nonexistent token'
          if approved[tokenId] == caller:
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              if ownerOf[tokenId] != from:
                  revert with 0, 'ERC721: transfer from incorrect owner'
              if not to:
                  revert with 0, 'ERC721: transfer to the zero address'
              approved[tokenId] = 0
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              log Approval(
                    address owner=ownerOf[tokenId],
                    address spender=0,
                    uint256 value=tokenId)
              if balanceOf[address(from)] < 1:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(from)]--
              if balanceOf[address(to)] > -2:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(to)]++
              ownerOf[tokenId] = to
              log Transfer(
                    address from=from,
                    address to=to,
                    uint256 value=tokenId)
              if ext_code.size(to) <= 0:
                  stop
              if this.address != caller:
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args caller, address(from), tokenId, Array(len=_data.length, data=_data[all])
              else:
                  mem[ceil32(ceil32(_data.length)) + 97] = calldata.size
                  mem[ceil32(ceil32(_data.length)) + 129 len calldata.size] = call.data[0 len calldata.size]
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args mem[ceil32(ceil32(_data.length)) + calldata.size + 109 len 20], address(from), tokenId, Array(len=_data.length, data=_data[all])
          else:
              mem[ceil32(ceil32(_data.length)) + 101] = ownerOf[tokenId]
              static call proxyRegistryAddress.proxies(address ) with:
                      gas gas_remaining wei
                     args ownerOf[tokenId]
              if not ext_call.success:
                  revert with ext_call.return_data[0 len return_data.size]
              require return_data.size >=′ 32
              require ext_call.return_data[0] == ext_call.return_data[12 len 20]
              if ext_call.return_data[12 len 20] != caller:
                  if not stor5[stor2[tokenId]][caller]:
                      revert with 0, 'ERC721: transfer caller is not owner nor approved'
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              if ownerOf[tokenId] != from:
                  revert with 0, 'ERC721: transfer from incorrect owner'
              if not to:
                  revert with 0, 'ERC721: transfer to the zero address'
              approved[tokenId] = 0
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              log Approval(
                    address owner=ownerOf[tokenId],
                    address spender=0,
                    uint256 value=tokenId)
              if balanceOf[address(from)] < 1:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(from)]--
              if balanceOf[address(to)] > -2:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(to)]++
              ownerOf[tokenId] = to
              log Transfer(
                    address from=from,
                    address to=to,
                    uint256 value=tokenId)
              if ext_code.size(to) <= 0:
                  stop
              if this.address != caller:
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args caller, address(from), tokenId, Array(len=_data.length, data=_data[all])
              else:
                  mem[ceil32(ceil32(_data.length)) + ceil32(return_data.size) + 97] = calldata.size
                  mem[ceil32(ceil32(_data.length)) + ceil32(return_data.size) + 129 len calldata.size] = call.data[0 len calldata.size]
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args mem[ceil32(ceil32(_data.length)) + ceil32(return_data.size) + calldata.size + 109 len 20], address(from), tokenId, Array(len=_data.length, data=_data[all])
  else:
      mem[ceil32(ceil32(_data.length)) + 97] = calldata.size
      mem[ceil32(ceil32(_data.length)) + 129 len calldata.size] = call.data[0 len calldata.size]
      if not ownerOf[tokenId]:
          revert with 0, 'ERC721: operator query for nonexistent token'
      if not ownerOf[tokenId]:
          revert with 0, 'ERC721: owner query for nonexistent token'
      if mem[ceil32(ceil32(_data.length)) + calldata.size + 109 len 20] == ownerOf[tokenId]:
          if not ownerOf[tokenId]:
              revert with 0, 'ERC721: owner query for nonexistent token'
          if ownerOf[tokenId] != from:
              revert with 0, 'ERC721: transfer from incorrect owner'
          if not to:
              revert with 0, 'ERC721: transfer to the zero address'
          approved[tokenId] = 0
          if not ownerOf[tokenId]:
              revert with 0, 'ERC721: owner query for nonexistent token'
          log Approval(
                address owner=ownerOf[tokenId],
                address spender=0,
                uint256 value=tokenId)
          if balanceOf[address(from)] < 1:
              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
          balanceOf[address(from)]--
          if balanceOf[address(to)] > -2:
              revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
          balanceOf[address(to)]++
          ownerOf[tokenId] = to
          log Transfer(
                address from=from,
                address to=to,
                uint256 value=tokenId)
          if ext_code.size(to) <= 0:
              stop
          if this.address != caller:
              call to.onERC721Received(address , address , uint256 , bytes ) with:
                   gas gas_remaining wei
                  args caller, address(from), tokenId, Array(len=_data.length, data=_data[all])
          else:
              mem[ceil32(ceil32(_data.length)) + ceil32(calldata.size) + 129] = calldata.size
              mem[ceil32(ceil32(_data.length)) + ceil32(calldata.size) + 161 len calldata.size] = call.data[0 len calldata.size]
              call to.onERC721Received(address , address , uint256 , bytes ) with:
                   gas gas_remaining wei
                  args mem[ceil32(ceil32(_data.length)) + ceil32(calldata.size) + calldata.size + 141 len 20], address(from), tokenId, Array(len=_data.length, data=_data[all])
      else:
          if not ownerOf[tokenId]:
              revert with 0, 'ERC721: approved query for nonexistent token'
          if approved[tokenId] == mem[ceil32(ceil32(_data.length)) + calldata.size + 109 len 20]:
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              if ownerOf[tokenId] != from:
                  revert with 0, 'ERC721: transfer from incorrect owner'
              if not to:
                  revert with 0, 'ERC721: transfer to the zero address'
              approved[tokenId] = 0
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              log Approval(
                    address owner=ownerOf[tokenId],
                    address spender=0,
                    uint256 value=tokenId)
              if balanceOf[address(from)] < 1:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(from)]--
              if balanceOf[address(to)] > -2:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(to)]++
              ownerOf[tokenId] = to
              log Transfer(
                    address from=from,
                    address to=to,
                    uint256 value=tokenId)
              if ext_code.size(to) <= 0:
                  stop
              if this.address != caller:
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args caller, address(from), tokenId, Array(len=_data.length, data=_data[all])
              else:
                  mem[ceil32(ceil32(_data.length)) + ceil32(calldata.size) + 129] = calldata.size
                  mem[ceil32(ceil32(_data.length)) + ceil32(calldata.size) + 161 len calldata.size] = call.data[0 len calldata.size]
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args mem[ceil32(ceil32(_data.length)) + ceil32(calldata.size) + calldata.size + 141 len 20], address(from), tokenId, Array(len=_data.length, data=_data[all])
          else:
              mem[ceil32(ceil32(_data.length)) + ceil32(calldata.size) + 133] = ownerOf[tokenId]
              static call proxyRegistryAddress.proxies(address ) with:
                      gas gas_remaining wei
                     args ownerOf[tokenId]
              if not ext_call.success:
                  revert with ext_call.return_data[0 len return_data.size]
              require return_data.size >=′ 32
              require ext_call.return_data[0] == ext_call.return_data[12 len 20]
              if ext_call.return_data[12 len 20] != mem[ceil32(ceil32(_data.length)) + calldata.size + 109 len 20]:
                  if not stor5[stor2[tokenId]][address(mem[ceil32(ceil32(_data.length)) + calldata.size + 97])]:
                      revert with 0, 'ERC721: transfer caller is not owner nor approved'
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              if ownerOf[tokenId] != from:
                  revert with 0, 'ERC721: transfer from incorrect owner'
              if not to:
                  revert with 0, 'ERC721: transfer to the zero address'
              approved[tokenId] = 0
              if not ownerOf[tokenId]:
                  revert with 0, 'ERC721: owner query for nonexistent token'
              log Approval(
                    address owner=ownerOf[tokenId],
                    address spender=0,
                    uint256 value=tokenId)
              if balanceOf[address(from)] < 1:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(from)]--
              if balanceOf[address(to)] > -2:
                  revert with Panic(17)  # If an arithmetic operation results in underflow or overflow outside of an unchecked { ... } block.
              balanceOf[address(to)]++
              ownerOf[tokenId] = to
              log Transfer(
                    address from=from,
                    address to=to,
                    uint256 value=tokenId)
              if ext_code.size(to) <= 0:
                  stop
              if this.address != caller:
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args caller, address(from), tokenId, Array(len=_data.length, data=_data[all])
              else:
                  mem[ceil32(ceil32(_data.length)) + ceil32(calldata.size) + ceil32(return_data.size) + 129] = calldata.size
                  mem[ceil32(ceil32(_data.length)) + ceil32(calldata.size) + ceil32(return_data.size) + 161 len calldata.size] = call.data[0 len calldata.size]
                  call to.onERC721Received(address , address , uint256 , bytes ) with:
                       gas gas_remaining wei
                      args mem[ceil32(ceil32(_data.length)) + ceil32(calldata.size) + ceil32(return_data.size) + calldata.size + 141 len 20], address(from), tokenId, Array(len=_data.length, data=_data[all])
  if not ext_call.success:
      if not return_data.size:
          if _data.length:
              revert with _data[all]
      else:
          if return_data.size:
              revert with ext_call.return_data[0 len return_data.size]
  else:
      require return_data.size >=′ 32
      require ext_call.return_data[0] == Mask(32, 224, ext_call.return_data[0])
  ...  # Decompilation aborted, sorry: ("decompilation didn't finish",)

Decompilation generated by Panoramix.

Raw bytecode

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