In this episode, Calle introduces Numopay, an open-source Bitcoin payment terminal that enables tap-to-pay experiences similar to fiat systems. We explore its technical foundations, privacy features, future developments, and the broader ecosystem of Bitcoin payment solutions.
Takeaways:
Numopay's open-source payment terminal
Tap to pay Bitcoin using NFC and QR codes
Privacy features of Cashu’s eCash system
Auto withdrawal to Lightning addresses for security
Future developments including BIP321 and integrations
Timestamps:
(00:00) - Intro
(00:38) - What is Numopay?
(03:29) - Numopay’s UX, tap-to-pay & offline NFC payments
(08:30) - Unified QR codes (BIP 321)
(10:21) - Auto withdrawal to lightning address
(13:51) - Evolution of Bitcoin payment infrastructure
(20:08) - What is the future of Numopay?
(22:47) - The Cashu ecosystem in 2026
(27:34) - Where should people be using Cashu systems today?
(30:48) - Privacy in Bitcoin
(34:34) - Future of Bitcoin development with AI
(42:06) - Closing thoughts
Links:
Stephan Livera links:
Follow me on X: @stephanlivera
