48 lines
1.8 KiB
Solidity
48 lines
1.8 KiB
Solidity
// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/extensions/ERC721Royalty.sol)
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pragma solidity ^0.8.19;
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import {ERC721} from "../ERC721.sol";
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import {ERC2981} from "../../common/ERC2981.sol";
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import {ERC165} from "../../../utils/introspection/ERC165.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 {ERC2981-_setDefaultRoyalty}, and/or individually for
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* specific token ids via {ERC2981-_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 ERC721Royalty is ERC2981, ERC721 {
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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(ERC721, ERC2981) 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-_update}. This override additionally clears the royalty information for the token.
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*/
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function _update(
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address to,
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uint256 tokenId,
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function(address, address, uint256) view constraints
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) internal virtual override returns (address) {
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address from = super._update(to, tokenId, constraints);
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if (to == address(0)) {
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_resetTokenRoyalty(tokenId);
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}
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return from;
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}
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}
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