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- // SPDX-License-Identifier: MIT
- // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165Storage.sol)
- pragma solidity ^0.8.0;
- import "./ERC165Upgradeable.sol";
- import "../../proxy/utils/Initializable.sol";
- /**
- * @dev Storage based implementation of the {IERC165} interface.
- *
- * Contracts may inherit from this and call {_registerInterface} to declare
- * their support of an interface.
- */
- abstract contract ERC165StorageUpgradeable is Initializable, ERC165Upgradeable {
- function __ERC165Storage_init() internal onlyInitializing {
- __ERC165_init_unchained();
- __ERC165Storage_init_unchained();
- }
- function __ERC165Storage_init_unchained() internal onlyInitializing {
- }
- /**
- * @dev Mapping of interface ids to whether or not it's supported.
- */
- mapping(bytes4 => bool) private _supportedInterfaces;
- /**
- * @dev See {IERC165-supportsInterface}.
- */
- function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
- return super.supportsInterface(interfaceId) || _supportedInterfaces[interfaceId];
- }
- /**
- * @dev Registers the contract as an implementer of the interface defined by
- * `interfaceId`. Support of the actual ERC165 interface is automatic and
- * registering its interface id is not required.
- *
- * See {IERC165-supportsInterface}.
- *
- * Requirements:
- *
- * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
- */
- function _registerInterface(bytes4 interfaceId) internal virtual {
- require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
- _supportedInterfaces[interfaceId] = true;
- }
- uint256[49] private __gap;
- }
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