# Cashu Dev Call 27 – November 20th, 2025
## Time: 16:00 UTC

### NUTs

#### Merged

* [NUT-11](https://github.com/cashubtc/nuts/pull/304) - Use new signing scheme for SIG_ALL
* [NUT-11](https://github.com/cashubtc/nuts/pull/302) - SIG_ALL: extent aggregated message to secret + C for inputs and amount + B_ for outputs

#### Edit
* [NUT-12](https://github.com/cashubtc/nuts/pull/311) - DLEQ: 'r' refers to the mint's random nonce, and also to Alice's blinding factor.

#### New(ish)
* [NUT-XX](https://github.com/cashubtc/nuts/pull/292) - Deterministic NUT-13 Derivation Paths, relevant for ehash, also just learned it is relevant for [NUT-XX](https://github.com/cashubtc/nuts/pull/250) - Mint Remote signer standard
* See discussion on this [PR](https://github.com/cashubtc/cdk/pull/1257)

### Projects

#### Mint Updates
* [cdk v0.14.0](https://github.com/cashubtc/cdk/releases)
* [nutshell v0.18.1](https://github.com/cashubtc/nutshell/releases)
* [Rotate keysets and enable fees script](https://gist.github.com/callebtc/2dc31819c46d4093b16325a279aabddc)

#### Library and Bindings Updates
* CDK Bindings
* [cdk-swift v0.14.0](https://github.com/cashubtc/cdk-swift/releases)
* [cdk-kotlin v0.14.0](https://github.com/cashubtc/cdk-kotlin/releases/tag/v0.13.4)
* cashu-ts
* [cashu-ts v3.1.0 and v3.1.1](https://github.com/cashubtc/cashu-ts/releases/tag/v3.1.0)
* [cashu-ts v2.8.0 and 2.8.1](https://github.com/cashubtc/cashu-ts/releases/tag/v2.8.0)
* [NUT-11](https://github.com/cashubtc/cashu-ts/pull/396) - adds support for arbitrary NUT11 secret tags

#### New Libraries

* [cdk-python](https://github.com/cashubtc/cdk-python)

#### Cashu Wallets Updates
* [cashu.me](https://github.com/cashubtc/cashu.me) -
- 🙏 New onboarding: restore from seed phrase during the onboarding, recover your mints from nostr backups, and mint discovery
- 🫂 Web of trust: settings -> nostr -> crawl web of trust. enter your nostr keys to crawl your web of trust
- 🔎 Mint discovery: completely redesigned mint discovery page, loads mint info, and dosen't show mints that don't respond
- 📈 Mint ratings: read ratings or recommend the mints you use.
now comes with mint recommendations
* [Macadamia](https://github.com/zeugmaster/macadamia) - v0.5.0 is in TestFlight!
* Distributing funds via percent allocation
* Sending locked tokens 🔐
* A little bit of glass
* [Minibits](https://github.com/minibits-cash/minibits_wallet/releases/tag/v0.3.2-beta.2) - Now on iOS App Store

#### Various Projects
#### New Projects
* [Wally](https://github.com/Origami74/wally) - Implements Cashu Wallet Connect (CWC), an extension of NIP-47 (Nostr Wallet Connect) that enables applications to interact with Cashu ecash wallets over Nostr
* [cashu.me extensions](https://github.com/Kelbie/cashu.me.extension)
* [Firefox](https://addons.mozilla.org/en-US/firefox/addon/cashu-me/)
* [Chrome](https://chromewebstore.google.com/detail/cashume/adfafhcbnbehkgpkfgpbgagkjlddkohj)
* [payonebite](https://pay.onebitebitcoin.com/) - Cashu ecash/lightning wallet, English/Japanese support and store search
* [bitpoints.me](https://github.com/bitpoints-cashu/bitpoints.me) - Cashu ecash wallet with Bluetooth mesh networking and Nostr integration. [PR](https://github.com/permissionlesstech/bitchat-android/pull/506)

#### Updated Projects
* [hashpool](https://github.com/vnprc/hashpool) - Contributors welcome
* [pool.hashpool.dev](https://pool.hashpool.dev/) - Web interface for pool statistics and monitoring
* [proxy.hashpool.dev](https://proxy.hashpool.dev/) - Web interface for proxy statistics and monitoring
* [wallet.hashpool.dev](https://wallet.hashpool.dev/) - Cashu wallet for ehash
* [Orchard v1.4.0](https://github.com/orangeshyguy21/orchard/releases/tag/v1.4.0) - Multi-user roles, security buffs, and better support for nutshell mints
* [0xchat](https://github.com/0xchat-app/0xchat-app-main/releases/tag/v1.5.0.95-release) - Built-in Tor SDK, now supports accessing onion relays and Cashu mints
* [Zeus](https://github.com/ZeusLN/zeus/releases/tag/v0.12.0-alpha3) - Improved Cashu mint fund restoration
* [Routstr](https://github.com/Routstr)
* [Roustr Chat v0.1.0](https://github.com/Routstr/routstr-chat) - stable release
* [Nostr post](https://njump.me/nevent1qqsznrc48aqkwsa0426kgdlrpjryyzch8smc694napm5p788lp953wgpz3mhxw309ucnydewxqhrqt338g6rsd3e9upzpzlk9xea2xdqlz5rjqfh53zup6e0tu454rkhz9gaazvq285qqmcnqvzqqqqqqyywt6ms)
* [Routstr Core v0.2.0](https://github.com/Routstr/routstr-core/releases/tag/v0.2.0c) live on [api.roustr.com](https://api.routstr.com)

#### Nuttiest Project
* [Cashu for Communites](https://cashu4community.xyz) - Private, censorship-resistant payment systems for communities under authoritarian regimes
* [Video](https://www.youtube.com/watch?v=88fbVqAnWRo)

### Cashu and Privacy Resources/Articles

#### Blogs/Resources
* [Cashu Highlights Q3/25](https://blog.cashu.space/cashu-highlights-q3-25/)
* [Bringing Zero Knowledge Proofs to Cashu: Arbitrary Spending Conditions](https://blog.cashu.space/bringing-zero-knowledge-proofs-to-cashu/)
* [Deterministic Nostr Cashu Wallets ](https://primal.net/a/naddr1qvzqqqr4gupzquwlyyvnr5nwusgjr554h4puh3lrsfg9uvemtsfagqtvak259kwhqq2kgwrnde44wj2g899hq4rpfauyxv6tga54gmu6zxr)
* [Cashu.me Tutorial](https://planb.academy/en/tutorials/wallet/mobile/cashu-me-509bf335-1122-49ec-9600-9987436985eb)

#### Presentations and Workshops
* [Graduated Wallets](https://x.com/i/status/1989362694713950580) - Evan K presentation at bitcoin++
* Vibe Code a Cashu Wallet Workshop
* [Video](https://blob.satellite.earth/f2a9c371eb55e712e8508b9dd27a55b20d03b38ff738b0e228fd45eb507addeb)
* [Nostr post](https://primal.net/e/nevent1qqs9xc5m5qqm76lpy6xa9cde3eky3usuccfsjnv0mnlsh8xdnvr8gsc0pdxuy)

### [NutNovember Hackathon Demoes!](https://nutnovember.org/)

* Prize Pool now at 1 million ~~sats~~ ₿
* [Cashu-402](https://deez-cashus.fly.dev/) - Production-ready demonstration of HTTP 402 (Payment Required) implemented in Go, using Cashu for privacy-preserving, Bitcoin-backed micropayments
* [Purrwallet](https://github.com/heathermm55/purrwallet) - 🐱 Cashu ecash wallet powered by CDK. Latest stable release on Zapstore [here](https://zapstore.dev/apps/naddr1qvzqqqr7pvpzqqxlkgyptfc7y3tj8980m7lhwtjk55reyxuzsusp4wynwjtwarndqqfxxmmd9ec82unjwaskcmr9wshxzursqntc4u)
* [Cashu-casino](https://github.com/babdbtc/cashucasino
) with [Demo](https://cashucasino.cc/) - no-KYC gaming platform built on Cashu ecash and Nostr.
* [P2BK](https://github.com/cashubtc/cashu-ts/pull/377
) - P2BK (Pay to Blinded Key)
* [Taskify](https://github.com/Solife-me/Taskify_Release) - App for tasks that allows you to attach ecash bounties to tasks and share boards over nostr.
* [Bitcoin Colosseum](https://www.bitcoincolosseum.it/) - Cashu + [Bitchat scavaenger hunt](https://cryptpad.fr/file/#/2/file/Idta1uFq08a+sot4sYWjM0rm/), [cashu education project](https://cashu-playbook.lovable.app/).
* [Pecan Bank](https://github.com/Egge21M/pecan-bank) - Cashu Payment Requests powered digital piggy bank build on Coco
* [On-Chains Disc Golf](https://onchaindiscgolf.com) - Disc Golf Score Keeping App with automatic cashu/lightning payouts.
* [CypherTap](https://github.com/cypherflow/cyphertap) - Nostr, Lightning & Ecash in a Single Svelte Component
* [Bitcoin-Skills](https://gitlab.com/lemonknowsall/bitcoin-skills) - Agent skills/instructions for building bitcoin, lightning and cashu wallets using Claude Skills to easily vibe-code wallets.

### Q&A (if time)
* Bring your questions for the nuts.

#### Matrix server
- Join our [Matrix dev server](https://matrix.to/#/#dev:matrix.cashu.space)

#### Next Meeting 16:00 UTC, 3rd Thursday instead December 18th, 2025
* (generally) Last Thursday of each month
* For Nov/Dec, will be November 20th/December 18th, 3rd Thursday due to holidays