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30 lines
987 B
Solidity
30 lines
987 B
Solidity
2 years ago
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// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
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pragma solidity ^0.8.0;
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import "./IERC165.sol";
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/**
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* @dev Implementation of the {IERC165} interface.
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*
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* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
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* for the additional interface id that will be supported. For example:
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*
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* ```solidity
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* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
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* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
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* }
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* ```
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*
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* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
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*/
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abstract contract ERC165 is IERC165 {
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/**
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* @dev See {IERC165-supportsInterface}.
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*/
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function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
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return interfaceId == type(IERC165).interfaceId;
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}
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}
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