Ready for Surfin Bitcoin starting today.

Kinda feel sad for those two folks I saw on the street, wearing guns and bulletproof vests, risking their lives to transport worthless FIAT money that central banks and governments can print out of thin air. If only there could be a way to transport unstoppable value simply with a cryptographic signature gossiped over a P2P network. #Bitcoin fixes this. Bitcoin is for peace.

何も知らずに一生壁の中で過ごすなんて嫌だ！ I don’t want to spend my entire life inside these walls without knowing anything!

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

Managed to beat the Rust implementation with a Zig implementation ⚡️ Initially it was slower, but, moving to use the same libsec256k1 C implementation for operations on SECP256k1 curve, now the Zig version is slightly faster. 113 micro seconds for the End to End BDHKE! Zig is fast ⚡ View quoted note →

Me today: write BDHKE scheme in Zig (https://github.com/AbdelStark/coconut). Benchmark it: Oh wow it's super fast, 1 millisecond for the end to end scheme. Find the Rust implementation (https://github.com/ngutech21/moksha) and benchmark it: it's about 10 times faster than my Zig implementation 😭 Gg Moksha folks! 🦀 is blazingly fast damn. I suspect there might be a gap in terms of performance between the Secp256k1 implementation of the Zig std lib and the C implementation (the secp256k1 crate being a Rust wrapper library for Pieter Wuille's libsecp256k1 in C). Zig benchmark: Rut benchmark:

Yo #nostr fam, anyone going to Surfin Bitcoin this year ? I will be there and giving a talk about Scaling Bitcoin using STARKs. Bring back OP_CAT.

What about Zkfying Cashu guys ? https://hackmd.io/@abdelhamid/starknut-zkfying-cashu

Implemented step 1 of the Blind Diffie-Hellmann Key Exchange (BDHKE) in Cairo. This scheme is used in Cashu (ecash protocol for #Bitcoin). Tested against the Nutshell reference implementation and got same results for blinding of secret messages. Would be cool to implement the other steps to have a version of Cashu protocol that is provable with STARK proofs.

GitHub

GitHub - AbdelStark/cashu-zk-engine: Cashu Protocol ZK engine. Blind Diffie-Hellmann Key Exchange (BDHKE) implementation in Cairo.

Cashu Protocol ZK engine. Blind Diffie-Hellmann Key Exchange (BDHKE) implementation in Cairo. - AbdelStark/cashu-zk-engine

Macro is horrible, risks of escalation of war, Asian Stock Markets crashing like never, capitulation from large funds. Nayib Bukele knows it well, Printer is coming. That's why he was smart enough to bet the future of El Salvador on #Bitcoin, and history will prove him right. No doubt about this.

X (formerly Twitter)

Nayib Bukele (@nayibbukele) on X

Brrrrrrr…

👀

#Nostr #FreedomOfSpeech Protocol

Provable Bitcoin Script VM is moving forward nicely, we implemented more than half of the opcodes in a week 🤯

GitHub

GitHub - starkware-bitcoin/shinigami: Bitcoin Script VM in Cairo

Bitcoin Script VM in Cairo. Contribute to starkware-bitcoin/shinigami development by creating an account on GitHub.

Of course in the remaining ones there are some that are much more complex to implement, but this is very promising.

Powering Verifiable Computation for the Nostr Revolution: https://hackmd.io/@abdelhamid/nostr-dvm-verifiable-computation #Nostr #FreedomOfSpeech #Integrity