Summary of my fun week playing with Cashu, that I discovered recently.

This week I did:

- try and tested Cashu.me wallet and loved the UX from the user perspective (sending some sats to my Cashu wallet directly from my Nostr client was also very fun)

- read the Cashu docs

- implemented first step of BDHKE in Cairo and wrote an article about potentially ZKfying Cashu using STARK proofs

- implemented the full BDHKE in Zig

- contributed to Moksha Rust implementation to add criterion benchmarks

- realised that my Zig implementation was 10x slower

- moved to using the libsecp256k1 in C instead of Secp256k1 from the Zig std lib

- managed to have better perf than the Rust version

- contributed to CDK to add criterion benchmarks