// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;

// interfaces

// libraries

// contracts

library IntrospectionStorage {
    // keccak256(abi.encode(uint256(keccak256("diamond.facets.introspection.storage")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 internal constant STORAGE_SLOT =
        0x81088bbc801e045ea3e7620779ab349988f58afbdfba10dff983df3f33522b00;

    struct Layout {
        mapping(bytes4 => bool) supportedInterfaces;
    }

    function layout() internal pure returns (Layout storage ds) {
        bytes32 slot = STORAGE_SLOT;
        assembly {
            ds.slot := slot
        }
    }
}