// File: contracts/SEC.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @title: Web3 Security Token
/// @author: manifold.xyz

import "./manifold/ERC721Creator.sol";

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//                                                                                                              ......'',,,,..     .........                                                                      //
//                                                                                                     ..,,;:clloodxxkkOOOOOkd:'.,cdxxkxxxdolc:;,'...                                                             //
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//    Ol'.                                                                         ..';cldxkkxdoox0X0kxk000Ox:.         .oKKKXXXXK000Kx'         .'cdk0Oo;:oxkxol;'..                                             //
//    NOl'                                                                     ..;codxkkxdoc;'.,ok0KKOkkkkxxOO;          ;k00KXXKOkO0Ol.         .:xOO0KKKK0OkkOOOkdl:'.                                          //
//    NXOc.                                                                   .;oxxxdlc;'..    'x0OOOxdddddxkx,  ...'',,,;cx000OkO00x:...        .oOOkkO0XXXKOdc:lxOOOkdc,..                                      //
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//    0Kk:..;oO0kl,.                                          .,ldkxo:..   ,dOOOkkOKNXKXNNWWNXKKKKKKXKKK0kkxddxOKXXK0OOOOOOkdc,.   .,lxxc'..,;:cc:,.. ..,:oxOOkdc'.  .dKXXKXNWWXOxdc'                             //
//    0Kk,   .;dOOxc.                                       .;lxkxl,.       ..,oOXNWMWWNNNNWNNNNNNNNX0kkkO0000KK0Odc,,;:clodxkd:.   .cxkdllodxxxxxxdl;.. ..';lxOOkd:';xKXXXKNWWKxxOOd:.                           //
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//               .'lOOx:.                                  .ckOxoldxo,.  .:x0KKNWN0o'         .. .:kXXO:.                 .;x0Oo'                  .'cxxc'.....    .;ldxdocclo;.    .cx0Ox:.                      //
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//    00kc..c0XX0Okk0Od;....                           .:dkOKKKKKOxddxxxo;.. .;xKXO:.     .':llccoOXX0c.       .lOXNNXOo;:kKX0dc,..    .,okOkxooc,.    .......;oxo:.  .'cx0Oo,.     ,okOkkXXxc;,..                //
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//    .,lxO00OOKNWWWNNXKOO000Odc,.                  .cx0Oo;.'cdxxxxkkxxxkkkkxdd0NKx,     .cONNKkddddxOKXXK0ko:':kXXx:..   .':ok0XXX0o'..cOKKx:.              .,lxd:.     .'cxOOd:..;ONXXXXK0kxxO0Oo;.             //
//      .';ldxxOXWWWWNN0kxkxdxO0xl,.              .,lO0kc.  'lk0KXXNNXXK000KKXXXNXO:.    .:OXXOc.....:kXNXK0xollkXNO:.       .:kKXX0o.  'lOKKOo,.          ..;oxxl,.       .,lxOOkooONWNXKK00x:;oO0x:.            //
//         ....,dKNNNNKOOOOo''cxOOxl,.           .;oO0d;.    'o0NWNKOxl:,,,;coxkxd:.      ,dKXKd,   .cOXXOxo::okKNXkc.       .;dOOxc.   'lOKX0x;.      .,:cloxkkdl::;;,..    .'cdxkkOXWWNNNX0c. .lO0xc.           //
//             'oO0XXK00KKx'   .:dOOxc,.        .;dOOd,.      ;xKXkc,..      ....         .:kXXOl. .;xKNKxolokKNNKx;.          ....    ,o0XKkl,.     .,lkOOkxdoodddddddoc,.......',;lOX0xol:'    .ck0kl'          //
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//               'lk0Oo;.        .'',:dOOl'   .:x0kc;:c:'.  'oOKk:.    ..,::;,..   .lkKXXXXXXXOl.     .';;;,'.        .:xKXNKd,...''.....,lOKX0d'    'lOKOdl:,.          ...,cxxl'   'ck0Ol.    .,;''l00o,.       //
//                .;oO0Oo;.   .:dkOkdldOOo'   .:k0kdk0KK0o,:x00x:.   .'ck0KKK0kl'..l0XXKOxddol;.                   .'cx0XNXKOo::okOOOxoc;;cxKXXk;     .:xO000Od,.           .,oxd:.   .ck00o' .ck00d:cOKx:.       //
//                  .:dO0Oo;. 'd0KK0OkO0kc.   .;xO0KKK0OkxdkKKx:.   .;d0XNXXXXXOo:lOXX0o,.           ......        ,d0XXKko:,,ckXNXXXXXXK0KXXX0l.     .;ok0KK0x;.            .cxxl,.   .cx00x:lO0KK0kkO0d,.       //
//                    .:dOKOo;,lkOOkO0XNKo,.   ,dKNNN0kdloxOxl,.    .ckKXXKkxOKXK0KXXKd'     .;cll:;:okOkdl:.     .:OXN0o,.  'dKNXOdodk0KKK0Od:.    .,oO0K0kdl,.            .,lxxl'     .;oO0Oxxxk0KXXKk:.        //
//                      .;dO0OdloxkOKXNNNKkl;;lkXWWWNKOkxxkxc'.     .,o0XKkc',lk0KKKOo,    .,d0XXXKKKXNNXKK0xc,,'..:OXN0l.   'dKXXOo;..,;;;,..     .;d0XKkc'.              .,lxxl,.      ..:dkxoox0XNNWXx,        //
//                        .;lxOOkOOOkxxk000Ok0NWWWNNXXKOkO00ko;.   .':xKXKx;.  .';:;'.     ,dKXX00KXNNKOk0XXXK000xclONN0l.   'd0XNXk:.            .ckKXXKd'                .;okdc'.         .cxddk0KNWWWNd.       //
//                          ..;clooc;'..,::lxKNKKXXXXXX0dcoOKKOd:;cx0KXNX0l.              .cOXXOl,;cddc''lxOXXXKXKOOKNKx;.   .,lxkkl'.            .;xKXXKx,         ..      .cdxdl:,'..    .,lkOkkk0XNWWNO;.      //
//                              ....       .cOKkxkKXXXXO:..,lkKXKKXNNXKXKOl'              .,dKX0d:.      ..,clccdOKKKOo,.       ...',;cllc;..       ':lol;.      .;lolc;'.   .;ldxkxdl;.  .ck00kddxkO000K0o'      //
//                                         .:k0kocldkkd;    .,dKWMWNkclOXKkc'....          .,lk0Kkl.            .,;:;'.          .;ok0KXXK0xc.                 .,oOKK00Oxl;.  .'cxOOkd:. .;xKKkc'.....'ck0kc.     //
//                                         .,d00d:....       .lKWMWKl.'oKXKOxxddl;.     ....';lkKKx;.                           .:kKXXK00KXXkc.        ...    .,d0K0xodk00xc.  .,lddl;.  .,o0K0d:.     'lO0o'     //
//                                          .:dOOd:.      .:dk0NWMWXd..'oOKXKKKK0xc.  .'lxkkkkO00kl'                            ,dKXXOl,:d0NKx;.    ..:odoc,..;dKX0d,.'lOK0d;.  .....     .'lk00k:.    .:xOx;.    //
//                                           .,lkOOd:.   .dKNXXNWWNKo.  .,cllldO0Od;...cx00Oxdol:,.            ...              ,xKNKx;..cOXNKxc,.',cx0XXX0xllxKXKx;. .,lddc'            ...;oOK0o.     ,oOkc.    //
//                                             .,lk0Od:..:0XK0KNWNKx;.       ..cdkkoccldOOxc'..              .;oxl,.';ldo:'.    .l0XX0o...lOXXXKOOkOKXXK0KXXKKXX0d;.    ....          .'codxkO0Kkc.     'okkc.    //
//                                               .,lk0Od:ckXXKXNNKkc.          .,ldxxxxxdl;.            .',,:lxOK0kkk0KKK0x:'..':d0XNKd,  .,lxO0KKKKK0xl:lkKXXKkc.                    'lOKK0Okxo:.      ,okx:.    //
//                                                 .,lk0Okk0KXNWXx:.             ..,;;,'..            .;oxkkkxdddkOOOxoox0KOxdxO0KXX0x:.     .',:ccc:,.. .':cc;.            ....      .ckKKOl,..       .:xko,.    //
//                                                   .,cdkkkkk0XKo'                     ....         .;okkdoc,...',,'...'cdkO00kxdol;.            ......               .';codxxdo:,.. .'lOK0o'   ..',,;cxkd:.     //
//                                                      ..''',ck0kl'.                ..,:cll:'       .;okxoc'.            .';:;'..               .,oxxxdl;.           ,dOKKXXXXXKKOxolclx0K0d,..':dxkkkkxo;.      //
//                                                            .:okOxl;...         ..,:oxxxkkx:.       .:oxkdc,..                                .:kXNNNXKOo,.        .:OXXKOxoooxOKKKKKKK0Od:. .:xOkdol:;..       //
//                                                             ..;ldxxdoc:;;,,,;;:lodxxoccokx:.       ..;lodxdocc::;'.              .',,..      'dKNNK0KXXKx,         ,dKX0x:. ..':lddddoc;.   .;dOkl;..          //
//                                                                .';clodddddddddddol:,..;oko;.......',;::::clooddxxo;.           .:dO0Oko;.   .;xXNXkld0XXO:.    ....,o0XXOc.      .....       .:xOxc.           //
//                                                                    ...',,;;;;,''..   .,oxxdolllooodddoc;,...,:oxdc'           .;x0000KKOd:'':d0XNKd:l0XXO:.  .:dkOOO0XXKk:.                   .cxkl,           //
//                                                                                       .,:clllollcc::;,...   .:ddc.        ...',okOd::oOKKOkO0KKK0x:'ckXX0o,..cOXNXXKK0Okl.      ...           .cxxl'           //
//                                                                                          ........           .:dxl'.   ..,:lodddxko,. .;ok000Oxo:,.  .lOKXKOdokKNX0xl:,'..     'lxxo;.        .:xkd;.           //
//                                                                                                             .'cddoc:::codddolldxxc.    .';;;,..      .:x0XXXXXXNKx:. ..,,'.  .c0XXKx;      .,lkko;.            //
//                                                                                                               .,:looooolc;'...;oxo,.                  .':oxOO0Oko;. .:k0K0kdclkKXKOl'   ..;lxOxl,.             //
//                                                                                                                 ........      .:dxl'.         .          ...'''..   'xXNNNNNXXNXKxc,'';coxkOxo;.               //
//                                                                                                                                .:dxl,.    .,:clc:,.                 'dKXXKKKKXXXX0kkkOOOkxoc,.                 //
//                                                                                                                                 .;oxo:...'cdkkOOOko;.               .:kKXXKOkxxddxxxdol:,'.                    //
//                                                                                                                                  .'cdxo:,:ooc:;cdO0kl'  ..''..       .,coxO0Oxl;......                         //
//                                                                                                                                    .;oxxdl:,.. .'ck0kl'.:xO0xc.        ..,lk0xc'                               //
//                                                                                                                                     .':oxxo:..  .;d00d;;oOKXKx;.     ..;cdkOdc.                                //
//                                                                                                                                       .':odxol:;cx0NN0xodkO0Od:'.',:loxkkxo;'.                                 //
//                                                                                                                                         ..,codxOKNWNNNNNXXXXX0kkkOOOkxoc;..                                    //
//                                                                                                                                            ..,lOXNK0KNWWWWNX0xddolc;'..                                        //
//                                                                                                                                              .l0XOodO0000Okxl'....                                             //
//                                                                                                                                             .:kKk:,dOkkxxxxko,.                                                //
//                                                                                                                                            .,d0Oc. .,,,,,:x0x:.                                                //
//                                                                                                                                            .ck0o'        ;x0d;.                                                //
//                                                                                                                                                                                                                //
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//                                                                                                                                                                                                                //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


contract SEC is ERC721Creator {
    constructor() ERC721Creator("Web3 Security Token", "SEC") {}
}

// File: contracts/manifold/ERC721Creator.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

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

contract ERC721Creator is Proxy {
    
    constructor(string memory name, string memory symbol) {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0x5133522ea5A0494EcB83F26311A095DDD7a9D4b6;
        (bool success, ) = 0x5133522ea5A0494EcB83F26311A095DDD7a9D4b6.delegatecall(abi.encodeWithSignature("initialize(string,string)", name, symbol));
        require(success, "Initialization failed");
    }
        
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

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

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

}

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



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [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://consensys.net/diligence/blog/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/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

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

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

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

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

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

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:
 * ```solidity
 * 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`, `uint256`._
 * _Available since v4.9 for `string`, `bytes`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct StringSlot {
        string value;
    }

    struct BytesSlot {
        bytes value;
    }

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

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

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

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

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

    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }

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

    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }
}