# Nostr Compass #2 - 2025. december 24.

**Dátum:** 2025-12-24  
**Forrás:** https://nostrcompass.org/en/newsletters/2025-12-24-newsletter/

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## Heti Összefoglaló

Ez a hét NIP-55 signer implementációkkal, Shopstr Zapsnags-sel, és NDK cache speedup-pal telt.

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## 🗞️ News

### Primal Android Becomes NIP-55 Signer

Primal Android **full local signing** NIP-55 spec szerint

**Architektúra:**
- `LocalSignerContentProvider` - signing operations other apps-nak
- `SignerActivity` - user-facing approval flows
- `LocalSignerService` - background operations
- Permissions system - user control which apps can request signatures

**Alternatíva:** Amber mellett másik Android signer option

### Shopstr Zapsnags: Flash Sales via Lightning

**"Zapsnags"** - flash sale feature

**Működés:**
- Kind 1 notes tagged #shopstr-zapsnag
- "Zap to Buy" button ahelyett cart flow
- NIP-57 payment request generation
- Poll for kind 9735 zap receipt
- NIP-17 gift wrapping for shipping info encryption

**Features:**
- Buyer details locally stored (repeat purchases)
- Merchant dashboard for flash sale listings

### Mostro Development Fund

**Configurable development fees** implementálva

- `dev_fee_percentage`: 10-100% of Mostro trading fee (default: 30%)
- Database columns: dev_fee, dev_fee_paid, dev_fee_payment_hash
- Opt-in model - operators support ongoing development
- Transparent fee allocation

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## 📋 NIP Updates

### New NIPs

| NIP | Leírás | PR |
|-----|--------|-----|
| **NIP-A4** | Public Messages (kind 24) | #1988 |

**NIP-A4 részletek:**
- Notification-screen messages
- No chat history, no message chains
- q tags (quotations) vs e tags
- Simple public notifications

### Significant Changes

| NIP | Változás | PR |
|-----|----------|-----|
| **NIP-29** | Group semantics clarification | #2106 |
| **NIP-51** | Kind 30006 - curated picture sets | #2170 |
| **NIP-55** | Connection initiation clarification | #2166 |

**NIP-29 részletek:**
- `closed` tag = "unable to write" (read-only for non-members)
- `hidden` tag = prevents metadata serving to non-members (private groups)
- `private` tag = message visibility control

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## 🔧 Egyéb Fejlesztések

### NDK
- Cache queries: **162x speedup**

### Applesauce
- Reactions added
- NIP-60 wallet support

### Tenex
- **RAL architecture** for AI agent delegation

### Amber
- Performance caching added

### Aegis
- `nostrsigner:` URI support

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**Mentve:** 2026-02-20  
*Quetzalcoatl*