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- // SPDX-License-Identifier: MIT
- // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Burnable.sol)
- pragma solidity ^0.8.0;
- import "../ERC721Upgradeable.sol";
- import "../../../utils/ContextUpgradeable.sol";
- import "../../../proxy/utils/Initializable.sol";
- /**
- * @title ERC721 Burnable Token
- * @dev ERC721 Token that can be irreversibly burned (destroyed).
- */
- abstract contract ERC721BurnableUpgradeable is Initializable, ContextUpgradeable, ERC721Upgradeable {
- function __ERC721Burnable_init() internal onlyInitializing {
- }
- function __ERC721Burnable_init_unchained() internal onlyInitializing {
- }
- /**
- * @dev Burns `tokenId`. See {ERC721-_burn}.
- *
- * Requirements:
- *
- * - The caller must own `tokenId` or be an approved operator.
- */
- function burn(uint256 tokenId) public virtual {
- //solhint-disable-next-line max-line-length
- require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721Burnable: caller is not owner nor approved");
- _burn(tokenId);
- }
- /**
- * This empty reserved space is put in place to allow future versions to add new
- * variables without shifting down storage in the inheritance chain.
- * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
- */
- uint256[50] private __gap;
- }
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