[mirekrusin]

But this fractalbits thingy is not open source.

Their internals (in zig, actually interesting functional part) are proprietary.

What is open source is client side to access it from rust.

Did I get it right?

[fractalbits]

Yes, since zig is moving to new async IO and we'd like to wait for it to be more stable before open sourcing our metadata engine. You can check the underneath runtime which we are using for now: https://codeberg.org/thomas-fractalbits/iofthetiger