Cashu developers have so far avoided being seduced by Chinese spies.

Our 🥜's have not been compromised .

We've been cooking in the Cashu R&D labs, building a faster, more efficient animated QR encoder with fewer dependencies.

Please have a play with the demo below - and let me know if it works well. You can try both the existing (UR) and new (Fountain) formats.

Looking to try as many device combos as possible to ensure it is robust, and get an idea of optimal frame speeds etc, so your feedback is very welcome! 🙏

https://qr.cashutools.dev

If you've been thinking of exploring Cashu, then Nut November is the best time to start... as you can win prizes for your creations too!

cashu-ts 4.13.0 is out 🥜

Cashu-TS, the Typescript library that powers many Cashu Wallets and services, just got better NUT-18 payment request support.

- Pay a request in one call. wallet.ops.sendToRequest(request) applies every payer rule for you: unit, mint list, accepted methods, per-method fees, input fees and the lock. You can't underpay by accident.
- Check a payment in one call. wallet.isPaymentRequestSatisfied(...) tells a payee whether the proofs they received really cover the request. It checks the net amount after fees, mint, unit, duplicates and the spending conditions.
- Request features that match v5: preferred mints (mp), supported methods with per-method fees (sm), and wire-safe encodePayload / decodePayload helpers.

It's a drop-in upgrade for v4 users. There's a new usage guide in payment_requests.md.

The Nutroot spec for Cashu is now in review, and we're all pretty excited about it. It's going to be a huge leap forward for Cashu.

So I asked Claude make a video to help explain the core concepts to the rest of the Cashu developer team, and make it easier for them to review.

It's fairly technical, but hopefully may be interesting to others too.

The last few months, I've been head down working on "Nutroot", which is the evolution of Cashu P2PK, built on top of the BLS based "keyset v3".

It's getting the final polishing touches now, and I'm thrilled that @calle will be talking about it and some of the exciting possibilities it unlocks at @btcplusplus on Thursday Oct 1 at 12:00 PM (10AM UTC I believe).

Sadly I won't be there in person, but I will be watching the livestream.

https://btcpp.dev/whois/callebtc

Egge has done an amazing job on NPUB.cash, and the new quote based flow is really slick.

For Nostrly users, there is no change to how you receive your sats - Nostrly passes the lightning request to the NPUB.cash service as before.

The difference is now how you COLLECT those sats. If you previously used the web wallet at npub.cash, you will now need to use a supported wallet like Sovran or Cashu.me.