// File: contracts/QM.sol




// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @title: Falling Through A Field
/// @author: manifold.xyz

import "./ERC721Creator.sol";

////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//                                                                                                            //
//                                                                                                            //
//    7777777777777777777777!!~~^^~~^^::^~~:.:::^~^:~~!!~~~~~~7~^:~^^~~!!!!!7!!7!777777777??7!..:!??777777    //
//    7777777777777777777!!!~~~^^^^:^^^~~~^:^^:.:::.:^!~:::::^^::^^^~!!!!!!!!!7!777!777777??!^::^7??77?777    //
//    77777777777777777777!!!!~~^~~^~!!!!~~~~~^^^:^:...:^....::::^^^~~!!~~~~!77!7!!!~!777???7!~::!7?????77    //
//    777777777777777777!777!!~~~^~~~!!!!!!!!~~~~:^~^..::.....::^^::~^~!~^~~!7!7!!!!^~77777???7^:!???????7    //
//    7777777777777777777777!!~~~!!!!!~~!~~~~~~~~~~!~:....::..:::::^~^~~!!!77!7!!!!!~~~!!77!777!!????????7    //
//    777777777777777777777777777777!!!~~!~^^^^~~!~~!!:...:...:::^^^~~~~!!!?!7!!!~77!^:~!77~:^~!77????????    //
//    777777777777777777777777777777!!^~~~::....:::.::........:::^^^^^^~^!?!!!~!!!77!~~!777~~~~~!77777????    //
//    77777777777777777777777777!!!!!!~~^:....................::::^^^^^^~?~!!~!77!77!!777777~~^~~!!!777???    //
//    777777777777777777777777!!!!!~~:........................:::::::..^?^^~^~!77777!!!!7!~!!~~~~^:!!~!77?    //
//    7777777777777777777!77!!!!!~~~^.........................::......^?^:^~~!!!7777!!!77!!!~~~~!!!^^^~!!7    //
//    77777777777777777777!!7!!~^:::^:.........................::....^7~^^^~!~:~!7777777777!~~~~!!^:::~~~!    //
//    777777777777777777!7!!!!~~!^:^^......:^!?JY55PPPP55YJJ?!~:....^?!^^^^!!~^:~77777777777!~~^^^^::::^~~    //
//    7777777777777777777!7!!^::^:::..^!?5G#&@@@@@@@@@@@&&#BGPP5?!::!!::^^^~!!!~^~!77777777!7!7!:.....::^~    //
//    777777777777777777!!!!!!^...:!?5B&@@@@@@@@@@@@@@@@@@@@@#BGPP5?JP5?!^:^~~!!~^7777777777!777!~:  ...:^    //
//    777777777777777777!!!!!~^:~J5PB&@@@@@@@@@@&&&@@@@@@@@@&@@@#BPP5PPPPY!:::::.^777777777777!77!!^:. ...    //
//    77777777777777777!!!!?^:!5PPB&@@@@@#BGPPPGGB&@@@@@@@@@@@@@@@&GPPPPPPPY~...::^~!7!!!7!!777!!!77!~^..     //
//    7777777777777777!!~!YP5JPPPB&#BBB#&#BB#&&@@@@@@&@@@@@@@@@&@@@#BBGPPPPPP7:..:^^^^~!!!~~!!777777!!!!^.    //
//    777777777777777!7!?PPPBBPP5GBP5G##&@@@#&&@@@@@@@@&@@@&&@@B&@@@##&BPPPPPPY^..:::::::^^~!!77777777777!    //
//    7777777777777!7!~JPPPBBPPPPPG#BB&&B@@@@@@@@@@@@@@@@@@@@@@@#@@@&#B&#PPPPPPJ...::..::::::^~!7777777777    //
//    777777777777!!!~YPPPGBGPBPPG#@@GB#G#@@@@@###&&@&GJB@@@@@@@@@@@@&BG#&GPPPPPJ...::.::::..:::~~!!!7!777    //
//    777777777!!!!~^JPPPG#GPG#B5PPB#GPP5JPG&B55BBBB#B55G&@@@#@@@@&GGB#GG#@BPPPPPY:...:..::..:::.:::~!~!!7    //
//    777777777!!!^^^PPPPGBPPP&@5?JY5GJ5#555YY?75PPGB##G#&#@&&GP#B!^!7BBPB#BP5PPPPJ....:..::::::::...:^^~~    //
//    7777777!^:.:..!55PPPPPP#@&#???5G#P5GPJ?YJ7B&&&@@&&&@&&&@BYP?~^^^5#GGB&G5Y5PPP?...::...::::::::.::::.    //
//    7777777~:.....!P55PPPP#@##@57?Y#@@&5G?755?#&#BBBG&@@&&GJ^:JGP5?~?#BB#@GP5J5PPP?....:....:::^^^^~~!!!    //
//    777777!~::::..YPPPPPP#@&B#@&??5G&@@&BGGB#G5J777775BGGY^   :JYJJ~7###@@BPPY5PPPPYJ~~!~::::^::..::^^~~    //
//    777777!~~^:..:5PPPPPG&&#B#&@BJ55PP&&###P7!!~~!!!?PP5P!^..^~^!YBGG&#@@#BPPP5PPPPP#@&&#G5J7~^::::::::^    //
//    7777777!!~::..JPPPPPPB&#BB#&@BBGYYPPGBG?!7!777?JPP55P5PG5GP5B&&&@&&&BGPPPPPPPPPP#@&@&@@&&&#GGBGPY!::    //
//    7777777!~^^::.?PPPPPPP###B##@&GGY~!?5777JJ???J5GBB##&&@@@@@@@&#GGP5PPPPPPPPPPPPG@@@@@@@&@@@&@@@@@@G5    //
//    7777777!~:^::.7PPPPPPPPB##&&&&&GPG5PPPPG#&&&@@@@@@@@&#BGPYJ??7777JPPGPPPPPPPPPP&@@@@@@@@@@@@@@@@@@@@    //
//    77777777!~^^..7PPPPPPPPGB#&@@@@&&&@@@@@@@@&&#BP5YJ?77!!!!!!77777JP?:7YPP55GPPP#@@@@@@@@@@@@@@@@@@@@@    //
//    777777777!^::!5PPPPPPPPGBGB#&@&#BBBGPP5YJ?77!!!!!!7777777777777J5!.:~?P5J5@&B#@@@@@@@@@@@@@@@@@@@@@@    //
//    77777777!!!7Y#GPPPPPPPPPPGGYPGPY?7777777777777777777777?77777?5#&##&@@@@#P#@@@@@@@@@@@@@@@@@@@@@@@@@    //
//    7777!^!7JB&@@@GPPPPPPPPPP5!.~?5P5J?????7???777?777777777??JYPB@@@@&B###@@BPBBB&@@@@@@@@@@@@@@@@@@@@@    //
//    7!!7?JP#@@@@@@BPPPPPPPY!^.....?#BPYJJJ????77??777?????JJ5G#&@@@@@@@#G#G&@@BG#GG&@@@@@@@@@@@@@@@@@@@@    //
//    7YB#&@@@@@@@@@@GPPPPP#7..^?5YG@@@@&##BGPP5YYYJJ5555PG#&&@@@@@@&##@@@##B#@@&GB&GB@@@@@@@@@@@@@@@@@@@@    //
//    #@@@@@@@@@@@@@@@BPG#&@#?Y@&#&#@@#&@&&@@@@@@&&&&@@@@@@@@@@@@@@@#&&@@@#B&#&@@&B##G&@@@@@@@@@@@@@@@@@@@    //
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//    @@@@@@@@@@@@@@@@@@@@@@@@@&#@&#@@@&#@#&@@@@@&&@&@@@@@@##@BB@@@&#@BB@@@&G#BG@@@BG@@@@@@@@@@@@@@@@@@@@@    //
//    @@@@@@@@@@@&@@@@@@@@@@@@@#B&##@@@&#&B#@@@@@@&&&##@@@&BB&B#@@@&G##PB@@@GG#G#@@&B#@@@@@@@@@@@@@@@@@@@@    //
//    @@@@@@@@@@&&@@@@@@@@@@@@@BB&B#@@@B#&B#@@@@@@&#&&B&@@@BG&BB@@@@GP#BP&@@#P#GG@@&#G&@@@@@@@@@@@@@@@@&#G    //
//    @@@@@@@@@@@@@@@@@@@@@@@@@B#&G&@@@GB&G#@@@#&@@#B&BB@@@&GB&GB@@@#PG#PB@@@GGBP&@B#GP&@@@@@@@@@&BPY?!^::    //
//    @@@@@@@@@@@@@@@@@@@@@@@@&G##G&@@&PB#P#@@@BB@@@GB#G#@@@BP#BP#@@&GPBGP#@@BPBP#@GG#PP&@@@@@@B7:........    //
//    @@@@@@@@@@@@@@@@@@@@@@@@&G#BG@@@#PBBP#@@@GG#@@#PBBP&@@@GP#GP&@@@PPBPB@@#PBPB@#PGBPG@@@@@G:..........    //
//    @@@@@@@@@@@@##&@@@@@@@@@#P#GG@@@BP#GP&@@&PGB@@@GP#GG@@@#PBBPB@@@BPGB#@@#PGP#@@GPBGP#@@&@~....:......    //
//    @@@@@@@@@@@@@@@@@@@@@@@@BP#GG@@@BP#GP&@@#PGB#@@&PBBP#@@@GPBGP#@@@GBGP&@#PGG#@@&PPBPG@@&5....:.......    //
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//    @@@@@@@@@@@@@@&##BBG#@@@GG#PB@@@BP#PG@@@#PBGP&@@BPBGP#@@@GPGGP#@@PPBP&@@BGGP#@@&PPPP@#7....:......^^    //
//    @@@@&&BGGP55Y?77!!!!!J&@PG#PG@@@BP#PG@@@BPBPP&@@&PGBPG@@@&PGBP&@@BPBP&@@BPBPB@@@GPPP@P::..:.........    //
//    5YJ??7!!!!!!!77777777!7B#PBPG@@@BPBPG@@@BPBGP&@@@PPBPP#@@@PBBP&@@#PGPB@@BPGPP&@@BPPG&7.::::.:^^^^^^^    //
//    7777777777777777777777!^YYBGG@@@BPBGG@@@BPBGP#@@@GPBGP#@@&PBBP#@@BPBPG@@#PGGP#@@#5YG#^:^^^:^~!!7!!!!    //
//    7777777777777777777777!~~!PGP&@@BPBGP@@@#PBGPB@@@BPBBP&@@&PGBPB@@BPGPP@@@PPGPB@@#PYB5^^^~~~!!~!!!!!!    //
//    777777777777777777777777!~JGP#@@#PBGP&@@&PGBPB@@@#PBBP&@@&PPBPB@@#PGGP@@@BPGPG@@#5YBJ^^^~~!!!!!!!!!7    //
//    7777777777777777777777777!!5PG@@&PBGP&@@&PGBPG@@@#PBBP#@@@GPBPB@@&PPGP&@@#PGGP&@#5YB7^^^~~!!!7777777    //
//    77777777777777777777777777!JPP#@@GGGP&@@@GP#PG@@@&PGBPB@@@BPBPG@@@BPGP#@@&PGGP#@#5YB!~!~!~7!7777777!    //
//    777777777777777777777777777!5PG@@BPBP#@@@BP#GP&@@@PG#PG@@@#PBGG@@@BPBPB@@@GPGP#@B55B!~!~!~77777777!!    //
//    777777777777777777777777777~J5P#@#PBPB@@@#PBBPB@@@GP#GP&@@&PGGG@@@#PBPG@@@BPGPB@B55B~^^^!~!!!777!!77    //
//    ?7777777777777777777777777!!~55G@&PBPG@@@&PGBPG@@@BPBGP#@@&PGBPG@@BPBGP&@@#PGPB@B55B~^^^!~77!77!7777    //
//    ??77777777777777777777777777!Y55&@GGGP#@@&PP#PG@@@#PBBPB@@@GPBPG@@#PGGP#@@&PPPG@B55B!^~~!~7777777777    //
//    ???7777777777777777777777!~!~!BYP@&PBPG@@@GPBPP@@@&PG#PG@@@BPBGG@@&PGBPG@@@GPPG@B5YB!^~~!~7777777777    //
//    ?????777777777777777777777!~~^G5Y#@GGGP&@@#PBGP#@@@GP#PG@@@#PBGG@@@GPBGP&@@BPPG@#PYB?^^^!~!777777777    //
//    ?????777777777777777777777777!JBYP@#PBPB@@@GPBPG@@@BPBGP&@@&PGBG@@@BPBGP#@@#PPG@&PY#B~^^~~~77!!77777    //
//    ??????777777777777777777777777~YP5#@GGGG@@@BPBPG@@@#PBBP#@@@GGBP&@@&PGBPB@@#PGP@@P5B#~^~~!~!77777777    //
//    ???????77777777777777777777777!5&YP@#PGP#@@#PBGP&@@&PGBP#@@@GGBP#@@@GPBPG@@&PGP&@GPP#J^!!!!!77777777    //
//    ?????7777777777777777777777777!B@BYB@GGPB@@&PGBP#@@&PGBPB@@@GG#PB@@@BPBGP&@&PGP#@BG#@#?!!7!!!7777777    //
//    ?????????77777777777777777777!J&@@BG&&PGP&@&PGBP#@@&PGBPB@@@GPBPG@@@&PGBP#@@GPPB@@@@@@Y!777!!7777777    //
//    ??????????7777777777777777777!P@@@@@@@GGP#@@BPBPB@@&PG#PG@@@BPGGP#@@@GPBP#@@BGB&@@@@@@J!777!!7777777    //
//    ?????????????7777777777777777!J@@@@@@@@@#B&@BPBPB@@@GP#PG@@@&PG#PB@@@BPBPB@@&&@@@@@@@#5J!777!!777777    //
//    ??????????????7777777777777777YG&@@@@@@@@@#@&PBGG@@@BP#GP&@@@GG&GG@@@#G##&@@@@@@@@@@B5557!777!!77777    //
//                                                                                                            //
//                                                                                                            //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////


contract QM is ERC721Creator {
    constructor() ERC721Creator("Falling Through A Field", "QM") {}
}

// File: contracts/ERC721Creator.sol




// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

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

contract ERC721Creator is Proxy {
    
    constructor(string memory name, string memory symbol) {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a;
        Address.functionDelegateCall(
            0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a,
            abi.encodeWithSignature("initialize(string,string)", name, symbol)
        );
    }
        
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

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

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

}

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



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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



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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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



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

pragma solidity ^0.8.0;

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

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

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

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

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

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