Pretty sure that this is the database that Jon Gjengset[0] was working on as part of his thesis project. There have been several videos shared by him during talks about the system. It's a really interesting concept.

edit: Here's[1] a video where he talks about the concept

[0]: https://www.youtube.com/@jonhoo [1]: https://www.youtube.com/watch?v=GctxvSPIfr8