# ERC721

- [ERC721Upgradeable](/elin/contracts-upgradeable-4.5.0/token/erc721/erc721upgradeable.md)
- [IERC721ReceiverUpgradeable](/elin/contracts-upgradeable-4.5.0/token/erc721/ierc721receiverupgradeable.md)
- [IERC721Upgradeable](/elin/contracts-upgradeable-4.5.0/token/erc721/ierc721upgradeable.md)
- [extensions](/elin/contracts-upgradeable-4.5.0/token/erc721/extensions.md)
- [ERC721EnumerableUpgradeable](/elin/contracts-upgradeable-4.5.0/token/erc721/extensions/erc721enumerableupgradeable.md)
- [IERC721EnumerableUpgradeable](/elin/contracts-upgradeable-4.5.0/token/erc721/extensions/ierc721enumerableupgradeable.md)
- [IERC721MetadataUpgradeable](/elin/contracts-upgradeable-4.5.0/token/erc721/extensions/ierc721metadataupgradeable.md)