> For the complete documentation index, see [llms.txt](https://contracts.synapseprotocol.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0.md).

# contracts-upgradeable-4.5.0

- [access](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/access.md)
- [AccessControlUpgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/access/accesscontrolupgradeable.md)
- [IAccessControlUpgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/access/iaccesscontrolupgradeable.md)
- [OwnableUpgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/access/ownableupgradeable.md)
- [security](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/security.md)
- [PausableUpgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/security/pausableupgradeable.md)
- [utils](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/utils.md)
- [AddressUpgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/utils/addressupgradeable.md)
- [ContextUpgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/utils/contextupgradeable.md)
- [StringsUpgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/utils/stringsupgradeable.md)
- [introspection](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/utils/introspection.md)
- [ERC165Upgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/utils/introspection/erc165upgradeable.md)
- [IERC165Upgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/utils/introspection/ierc165upgradeable.md)
- [proxy](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/proxy.md)
- [utils](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/proxy/utils.md)
- [Initializable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/proxy/utils/initializable.md)
- [token](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/token.md)
- [ERC20](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/token/erc20.md)
- [IERC20Upgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/token/erc20/ierc20upgradeable.md)
- [ERC721](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/token/erc721.md)
- [ERC721Upgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/token/erc721/erc721upgradeable.md)
- [IERC721ReceiverUpgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/token/erc721/ierc721receiverupgradeable.md)
- [IERC721Upgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/token/erc721/ierc721upgradeable.md)
- [extensions](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/token/erc721/extensions.md)
- [ERC721EnumerableUpgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/token/erc721/extensions/erc721enumerableupgradeable.md)
- [IERC721EnumerableUpgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/token/erc721/extensions/ierc721enumerableupgradeable.md)
- [IERC721MetadataUpgradeable](https://contracts.synapseprotocol.com/elin/contracts-upgradeable-4.5.0/token/erc721/extensions/ierc721metadataupgradeable.md)