I built a from-scratch experimental blockchain to explore some ideas I’ve been interested in:

– post-quantum signatures (Dilithium)

– custom zk-STARK system (AIR + FRI, written in Rust)

– shielded + anonymous transactions

– simple P2P gossip network

It’s not production-ready (no persistence, no DoS protection, etc.) — this is purely a learning/research project.

The most interesting part was implementing the STARK system end-to-end and integrating it into a working chain.

I’d really appreciate feedback, especially on: – the AIR design

– the privacy model

– tradeoffs between PQ signatures vs performance

Repo / demo:

https://github.com/sil714/qchain

Happy to answer any questions.

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