52 lines
2.1 KiB
Solidity
52 lines
2.1 KiB
Solidity
// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts (last updated v4.5.0-rc.0) (token/ERC721/extensions/ERC721Royalty.sol)
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pragma solidity ^0.8.0;
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import "../ERC721Upgradeable.sol";
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import "../../common/ERC2981Upgradeable.sol";
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import "../../../utils/introspection/ERC165Upgradeable.sol";
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import "../../../proxy/utils/Initializable.sol";
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/**
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* @dev Extension of ERC721 with the ERC2981 NFT Royalty Standard, a standardized way to retrieve royalty payment
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* information.
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*
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* Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for
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* specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first.
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*
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* IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See
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* https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to
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* voluntarily pay royalties together with sales, but note that this standard is not yet widely supported.
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*
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* _Available since v4.5._
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*/
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abstract contract ERC721RoyaltyUpgradeable is Initializable, ERC2981Upgradeable, ERC721Upgradeable {
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function __ERC721Royalty_init() internal onlyInitializing {
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}
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function __ERC721Royalty_init_unchained() internal onlyInitializing {
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}
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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(ERC721Upgradeable, ERC2981Upgradeable) returns (bool) {
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return super.supportsInterface(interfaceId);
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}
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/**
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* @dev See {ERC721-_burn}. This override additionally clears the royalty information for the token.
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*/
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function _burn(uint256 tokenId) internal virtual override {
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super._burn(tokenId);
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_resetTokenRoyalty(tokenId);
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}
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/**
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* This empty reserved space is put in place to allow future versions to add new
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* variables without shifting down storage in the inheritance chain.
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* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
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*/
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uint256[50] private __gap;
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}
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