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

I'm officially turning the recordings of my Bitcoin course lectures (in Portuguese: https://www.youtube.com/playlist?list=PLfdR3_dt2rbexb-ohbaLLzAuNAp7Ypt8u) into a coherent set of lecture notes. This is a work in progress and will be developed at:

GitHub

GitHub - edilmedeiros/bitcoin-course

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

The case for Bitcoin is not inflation. It is probably the only thing you will be able to truly possess. It's a case for private property.

Nunca imaginei ser convidado para qualquer podcast, quanto mais o da BIPA com o mestre Caio Leta que acompanho com frequência. Falamos um pouco da minha trajetória e do papel das universidades.

How much does it worth (not how much it costs) to send IP packets over the internet nowadays? That's the expected value of one satoshi in a future where bitcoin is as omnipresent as the internet. The screen price tells you nothing about the true value of Bitcoin.

Try to use your brain instead of trying to be right.

Great talk with @Ella Hough today at @Satsconf about bitcoin initiatives at universities. As I say, this is the institutionalization era of Bitcoin and it will be done when universities start to formally teach Bitcoin courses and programs. Ella is driving it from the students side, I'm pushing it from the inside. Let's see what future reserves us.

It's happening!

Sunday reading

Next week I'm attending @Satsconf to talk about the gap between Bitcoin and the Academia. They say that to change academia is like moving a graveyard: you can't count with their inhabitants. This is true in so many aspects. Yet, I believe both communities could benefit from more interaction. For academia, Bitcoin is a huge source of problems in the frontier of knowledge that require strong science. Also, it's an opportunity for working on real-world projects that will impact the lives of millions for good. Contributing to open source is an obvious way of returning the humongous investment all countries make in higher education in a meaningful way. On the Bitcoin side, having some of the smartest brains around has the potential to accelerate the pace of innovation and security in many protocols. This is not to say that Bitcoin needs the academic community, quite the contrary. If we, scholars, don't get out of the ivory tower and embrace the self-organizingethos of Bitcoin and related technologies, we will be obliterated by reality. View quoted note →

Vai ter Bitcoin na universidade pública. Será que sai uns bitcoiners daí? BTW, você pode assistir às minhas aulas no YouTube: https://youtube.com/@edilmedeiros?si=HGAVqLEjRi72MmlH