> For the complete documentation index, see [llms.txt](https://docs.tokentable.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tokentable.xyz/for-developers/unlocker/evm/apis/utilities/versionable.md).

# Versionable

## IVersionable

*This interface is implemented by all major TokenTable contracts to keep track of their versioning for upgrade compatibility checks.*

### version

```solidity
function version() external pure returns (string)
```