Endra App

A P2P encrypted messenger for desktop and mobile.

Linux ⋅ Windows ⋅ Android

Endra combines Walytis' peer-to-peer distributed database, WalytisIdentities' identity & cryptography management, and WalytisOffchain's secure data storage & transmission, and WalytisMutability's database editing abstraction to form a fully featured messaging protocol.

Features

• fully peer to peer, no servers of any kind
• can function independently of internet connectivity
• cryptography:
  • key rotation
  • hybrid cryptography combining classical and post-quantum algorithms
  • cryptographic agility (upgradable to novel algorithms)
  • perfect forward and backward secrecy for transmissions
• multiple devices per profile (user account)
• multiple profiles per device
• can be used as a library for embedding into other applications
• will become part of an expandable ecosystem incl. calendar and file-sharing

Features Coming Soon

So far the main focus of Endra has been its foundational architecture, so until now little work has been invested in essential higher-level messaging features. However, now is the time where some of these will start being developed and tested:

• rich text formatting (markdown as default, perhaps others too)
• inline multimedia
• file attachments with progress tracking for transmission
• take photos with camera
• scan QR-codes
• record audio with microphone
• zip-file backups

Disadvantages

• higher resource usage on user devices compared to conventional messengers

Usage Notes

• Patience - The app is slow to start, and the communication is not neccesarily something you'd call 'instant messaging'.
• Battery drain - On mobile devices, keep an eye on your battery level, as this app's P2P networking engine uses a fair amount of power.

OS Compatibility & Download

The Endra application is designed to be cross-platform for desktop and mobile. So far, it has been tested on Linux (Ubuntu 24 x86-64 & arm64), Android (arm64), Windows 11 (x86-64) and MacOS (x86-64 & arm64).

Package build pipelines have been developed for the below listed formats. You can download these application packages here.

Linux

• flatpak for x86-64 and arm64
• executable binary for x86-64 and arm64

Coming soon: Nix, AUR

Android

• APK for arm64

MacOS

• executable binary for x86-64 and arm64
• .app package for x86-64 and arm64

iOS

probably coming later, in Phase IV of the Endra Roadmap, unless

Windows

• portable EXE for x86-64

Run From Source

Install Prerequisites:

./install_prereqs.sh
pip install -r requirements.txt
pip install -r requirements-dev.txt

python .

Environment Variables

• USE_PANGO (defaults to false): Use the Pango text provider to enable broader character & emoji text rendering support
• USE_BRENTHY (defaults to false): Instead of running an embedded IPFS and Walytis node, use the separately running system services for IPFS and Walytis. This enables faster loading times. To set up IPFS & Walytis in this way, install Brenthy
• KIVY_NO_CONSOLELOG (defaults to false): stop kivy logging to console

DevOps

For speedy starting and termination of the app, on Linux, install Brenthy to run Walytis & IPFS as a systemd service. Then run Endra with:

USE_BRENTHY=1 python tests/test_app.py

Pressing Ctrl+C in the terminal should promptly close the Endra app.

Rerunning the app this way overwrites the app's appdata with a cache stored in tests/appdata, so that it doesn't matter if the app crashes and corrupts its appdata.

To save the current appdata, close the endra app, and run:

tests/update_appdata.sh

From now on, every time you run tests/test_app.py, the new appdata state will be loaded.

To reset the appdata, run:

rm -rf tests/appdata

Documentation

The thorough documentation for this project and the technologies it's based on live in a dedicated repository:

• EndraApp: learn how EndraApp works
• Walytis Technologies: learn about the suite of tools which EndraApp is part of, built to enable developers to easily develop peer-to-peer distributed applications.

Project Status EXPERIMENTAL

This library is very early in its development.

The API of this library IS LIKELY TO CHANGE in the near future!

RoadMap

See the Walytis Technologies RoadMap for the current plans for EndraApp in the context of the larger Walytis Technologies Project.

Contributing

Get Involved

• GitHub Discussions: if you want to share ideas
• GitHub Issues: if you find bugs, other issues, or would like to submit feature requests
• GitHub Merge Requests: if you think you know what you're doing, you're very welcome!

Financial Support

To support me in my work on this and other projects, you can make donations with the following currencies:

• Bitcoin: BC1Q45QEE6YTNGRC5TSZ42ZL3MWV8798ZEF70H2DG0
• Ethereum: 0xA32C3bBC2106C986317f202B3aa8eBc3063323D4
• Fiat (via Credit or Debit Card, Apple Pay, Google Pay, Revolut Pay)

Donations help me:

• dedicate more time to developing and maintaining open-source projects
• cover costs for IT infrastructure
• finance projects requiring additional hardware & compute

About the Developer

This project is developed by a human one-man team, publishing under the name Emendir.
I build open technologies trying to improve our world; learning, working and sharing under the principle:

Freely I have received, freely I give.

Feel welcome to join in with code contributions, discussions, ideas and more!

Open-Source in the Public Domain

I dedicate this project to the public domain. It is open source and free to use, share, modify, and build upon without restrictions or conditions.

I make no patent or trademark claims over this project.

Formally, you may use this project under either the:

• MIT No Attribution (MIT-0) or
• Creative Commons Zero (CC0) licence at your choice.

Related Projects

Walytis Technologies

An overarching project comprising the development of Walytis and a collection of tools based on it for real-world peer-to-peer communications.

• Walytis: A flexible, lightweight, nonlinear database-blockchain, built on IPFS.
• WalytisIdentities: P2P multi-controller cryptographic identity management, built on Walytis.
• WalytisOffchain: Secure access-controlled database-blockchain, built on WalytisIdentities.
• WalytisMutability: A Walytis blockchain overlay featuring block mutability.
• Endra: A P2P encrypted messaging protocol with multiple devices per user, built on Walytis.
• EndraApp: A P2P encrypted messenger supporting multiple devices per user, built on Walytis.

IPFS

A P2P communication and content addressing protocol developed by Protocol Labs. This is the networking foundation which Walytis builds upon.

Alternative Technologies

• Berty: a P2P messenger for mobile phones built on IPFS & OrbitDB