s5_messenger

A Flutter package for secure messaging using s5 and MLS (Messaging Layer Security) protocols. Enables easy-to-set-up, end-to-end encrypted messaging between clients.

Features

• End-to-end encryption via MLS
• Decentralized routing using S5 for message transportation
• Cross-platform support (Android, iOS, Linux, macOS, Windows)
• Rust-powered core via flutter_rust_bridge for performance
• Minimal-config messaging between authenticated clients

Installation

Add to your pubspec.yaml:

dependencies:
  s5_messenger: ^0.1.2
  hive_ce: ^2.11.3
  s5:
    git: 
      url: https://github.com/lukehmcc/s5-dart.git
      ref: 0.2.0-patched

Basic Usage

See example

⚠ cargo is required to build this project. Make sure to install first here

To test the library:

git clone --recursive https://github.com/s5-dev/s5_messenger.git # make sure to recuse submodules
# If you forgot to recurse and already cloned you can do this
# git submodule init && git submodule update
cd s5_messenger/
./flutterw run # Make sure to run with the flutter wrapper so everyone is on the same flutter version

Contributing

See CONTRIBUTING.md for development setup using:

• flutter_rust_bridge for FFI
• cargokit for Rust-Flutter integration

License

MIT (See LICENSE)

Acknowledgement

This work is supported by a Sia Foundation grant