b2504a7ff5
* feat(cashu): auto-link cashu tokens in chat - Detect cashuA/cashuB tokens via regex and render as tappable links - Style like URLs (underline; blue for others, orange for self) - Add openURL handler for cashu: scheme to delegate to wallet on iOS - Respect existing heavy-content gating and long-message collapsing * feat(ln): auto-link Lightning invoices and LNURL + lightning: scheme\n\n- Detect BOLT11 (lnbc/lntb/lnbcrt...), LNURL bech32, and lightning: URIs\n- Render as tappable links with lightning: scheme; consistent styling\n- Handle lightning: in openURL alongside cashu: * feat(links): replace raw Cashu/Lightning tokens with compact chips (🥜 pay via cashu / ⚡ pay via lightning) while keeping them tappable * style(links): add subtle background highlight to cashu/lightning chips * ui(links): render Lightning/Cashu as rounded chips under message with padding; remove inline chip text * ui(links): increase chip padding and corner radius; add extra top padding for chip row * scroll: auto-scroll to bottom when sending a new message (public + private), regardless of current scroll position * scroll(geo): when switching geohashes, scroll to top of chat (first visible message) --------- Co-authored-by: jack <jackjackbits@users.noreply.github.com>
bitchat
A decentralized peer-to-peer messaging app that works over Bluetooth mesh networks. No internet required, no servers, no phone numbers. It's the side-groupchat.
Warning
Private messages have not received external security review and may contain vulnerabilities. Do not use for sensitive use cases, and do not rely on its security until it has been reviewed. Now uses the Noise Protocol for identity and encryption. Public local chat (the main feature) has no security concerns.
License
This project is released into the public domain. See the LICENSE file for details.
Features
- Decentralized Mesh Network: Automatic peer discovery and multi-hop message relay over Bluetooth LE
- Privacy First: No accounts, no phone numbers, no persistent identifiers
- Private Message End-to-End Encryption: Noise Protocol
- IRC-Style Commands: Familiar
/slap,/msg,/whostyle interface - Universal App: Native support for iOS and macOS
- Emergency Wipe: Triple-tap to instantly clear all data
- Performance Optimizations: LZ4 message compression, adaptive battery modes, and optimized networking
Technical Architecture
Binary Protocol
bitchat uses an efficient binary protocol optimized for Bluetooth LE:
- Compact packet format with 1-byte type field
- TTL-based message routing (max 7 hops)
- Automatic fragmentation for large messages
- Message deduplication via unique IDs
Mesh Networking
- Each device acts as both client and peripheral
- Automatic peer discovery and connection management
- Adaptive duty cycling for battery optimization
For detailed protocol documentation, see the Technical Whitepaper.
Setup
Option 1: Using XcodeGen (Recommended)
-
Install XcodeGen if you haven't already:
brew install xcodegen -
Generate the Xcode project:
cd bitchat xcodegen generate -
Open the generated project:
open bitchat.xcodeproj
Option 2: Using Swift Package Manager
-
Open the project in Xcode:
cd bitchat open Package.swift -
Select your target device and run
Option 3: Manual Xcode Project
- Open Xcode and create a new iOS/macOS App
- Copy all Swift files from the
bitchatdirectory into your project - Update Info.plist with Bluetooth permissions
- Set deployment target to iOS 16.0 / macOS 13.0
Option 4: just
Want to try this on macos: just run will set it up and run from source.
Run just clean afterwards to restore things to original state for mobile app building and development.