ABOUT
ABOUT
Nut November was a community-driven month of Cashu development where builders, designers, and community builders came together to crack open new ideas in the Cashu ecosystem.
Throughout November 2025, we celebrated open-source, privacy-preserving ecash on Bitcoin. From wallet innovations to mint software breakthroughs, our community shipped incredible projects that pushed the Cashu ecosystem forward.
Thank you to everyone who participated, sponsored, and supported this hackathon. See the winners below!
WINNERS
WINNERS
Congratulations!
Meet the incredible builders who cracked it open this November
The Golden Nut
Best Overall Project
The Nutty Pill
A Bitcoin education app that gets people motivated to learn. Load up a reward pool via an admin dashboard and learners unlock sats by completing lessons and quizzes. Features roughly 85 lessons across a range of topics, all running locally with Cashu. Smart concept, strong execution.
Hardest Nut to Crack
Technical Breakthrough
Pay to Blinded Key (P2BK)
P2BK brings silent-payment style privacy to Cashu. It lets receivers publish a single key while still getting fully unlinkable payments. No reused pubkeys, no metadata leaks, no side channels. A serious step forward in Cashu privacy.
The Nuttiest Idea
Most Creative Concept
On-Chain Disc Golf
A disc golf scorekeeper with built-in Bitcoin payouts. No spreadsheets. No IOUs. Just pay in when you start, get paid when you finish. Built with Nostr, powered by Bitcoin, and unapologetically off-chain.
Best Design Nut
Outstanding UX/Design
Nostrpay
A child-friendly learning app with offline-first Cashu payments built into an educational environment. Parents connect a Lightning wallet, kids mint and send ecash, and the entire experience is wrapped in a playful, thoughtful, beginner-friendly interface.
Freshly Minted Nut
Best First-Time Contributor
Taskify
A clean, powerful to-do app where tasks can carry Cashu bounties. Share boards over Nostr, customize your workspace, and use a built-in ecash wallet with encrypted sync, notifications, and relay management. Huge debut with big potential.
Crowd Favorite
Community Choice Award
Cashu Monopoly
Classic Monopoly, but the money is real Bitcoin. Buy in with Lightning, pot held in a Cashu wallet, winner takes the sats. A fun, educational way to introduce people to Bitcoin, Lightning, and ecash all in one go.
All Submissions
Thank you to everyone who participated! Here are all the projects submitted to Nut November 2025.
See you next November! 🎉
PRIZES
PRIZES
The Golden Nut
Best overall project. The nut that shines brightest. Grand prize for the most impressive build that pushes Cashu forward.
₿159552
Hardest Nut to Crack
Toughest technical breakthrough. For the ones who refuse to give up. Rewards the most challenging technical innovation or bug fix.
₿89552
The Nuttiest Idea
Wildest experimental concept. Unhinged. Unhinged. Actually brilliant. Celebrates the most creative, out-of-the-box thinking.
₿69552
Best Design Nut
Design-focused improvement. Making ecash actually usable. For projects that make Cashu more accessible and delightful.
₿59552
Freshly Minted Nut
Best first-time contributor. Welcome to the shell game. Recognizes newcomers who made their first meaningful contribution.
₿49552
Crowd Favorite
This is the prize for the entry that receives the most votes from the Cashu community.
₿29552
PARTICIPATE
PARTICIPATE
Fork or Contribute
Find a Cashu project on GitHub or start your own. No idea is too nutty.
Build Something
Create a new tool, improve an existing one, or fix that bug that's been driving you nuts.
Share Your Progress
Post updates on Nostr or X with #NutNovember. Let the community see your nuts.
Submit by Nov 30
Deadline's November 30th.
FAQ
FAQ
Nope. Designers, writers, and community builders are all welcome. If you can contribute to Cashu in any way, you're in.
Submit anyway. Half-cracked nuts are still nuts. Progress and effort matter more than perfection.
Yes. It's a real hackathon with real prizes, but we're not taking ourselves too seriously.
Because Cashu. Also, 'No Nut November' exists, so we're flipping it. We're going nuts for ecash.
Cashu is a Chaumian ecash protocol for Bitcoin. It's private, offline-capable, and runs on Bitcoin. Think digital cash, but actually private.
Absolutely. Go nuts. Submit as many projects as you can build. Just make sure each one is meaningful.
Perfect time to start. Check out the docs, join the community, and dive in. Freshly minted nuts are especially welcome.
