https://blossom.primal.net/8c791b2450fa95e3c14b872d3153423e3fef1a5e35cf4b0c2ba2732da661744c.mp4
Integrated Cashu's Ecash protocol into Nostrpay for #NutNovember bringing offline-first digital Ecash capabilities to it.
It's FOSS: https://github.com/Unit-Matrix/nostrpay/tree/cashu-impl