Edil Medeiros

Mint, Melt, Repeat: Interactive E-cash for Bitcoiners at @TABConf 8 - Oct 12-15, 2026 ATL Explained the basic crypto behind modern E-cash and the Cashu protocol proposed by @calle. I fast coded a cashu wallet in stage, but you can check a more structured material at

GitHub

GitHub - edilmedeiros/cashu-workshop

Contribute to edilmedeiros/cashu-workshop development by creating an account on GitHub.

Feedback and PRs are super welcome to make this the best introductory cashu workshop/workbook.

Vibe coding is the cheap Chinese plastic gadget factory of the digital world.

The more I see people talking on the internet, the more convinced I get that explaining is a talent, not only a skill.

Bitdevs Porto Alegre essa semana!

Meetup

Porto Alegre Bitdevs - Seminário Socrático de Bitcoin #09, Thu, May 22, 2025, 7:00 PM | Meetup

Nona edição do Porto Alegre BitDev, no Senge (Av. Érico Veríssimo, 960 - Menino Deus). Agradecemos à [Vinteum](https://vinteum.org/) e à [Go...

Would you take a Bitcoin protocol course with the following lecture plan? What am I missing?

GitHub

GitHub - edilmedeiros/bitcoin-course

Contribute to edilmedeiros/bitcoin-course development by creating an account on GitHub.

--- **Part 1: Money, Bitcoin, and the Need for Decentralization** 1. What is Money? Why It Breaks 2. Decentralization and Its Challenges 3. Bitcoin’s High-Level Architecture **Part 2: Cryptographic Foundations for Bitcoin** 4. Finite Fields and Modular Arithmetic 5. Elliptic Curves and secp256k1 6. Digital Signatures: ECDSA and Schnorr 7. Cryptographic Hashes **Part 3: Understanding Bitcoin Transactions** 8. Transaction Serialization Basics (Legacy) 9. Bitcoin Script Language: Stack Semantics and p2pk 10. Bitcoin Script Contracts: p2pkh and p2sh 11. Transaction Malleability: The Problem and Motivation for SegWit 12. SegWit Transactions: p2wpkh and p2wsh 13. Advanced Script Features (Optional/Buffer) **Part 4: Wallets — From Keys to Usability** 14. Private Keys, Public Keys, and Addresses 15. Mnemonics and BIP39 16. Hierarchical Deterministic Wallets (BIP32) 17. Wallet Architecture and Security Models **Part 5: Mining, Proof of Work, and Settlement** 18. Proof of Work and Mining 19. Merkle Trees and Blockchain Structure 20. Chain Splits, Reorgs, and Settlement Assurance **Part 6: Second Layers and the Future of Bitcoin** 21. Bitcoin's Security Guarantees 22. Conceptual Introduction to Lightning Network 23. Other Scaling Visions and Open Problems