Lightweight Chat Application (LCA)

📌 Overview

LCA (Lightweight Chat Application) is a secure and lightweight and hybrid decentralized communication system. It supports RESTful APIs, WebSocket messaging, and RPC protocols, combining centralized management for security and decentralized personal data for resilience and privacy.

🧠 Core Concepts & Features

• Core Features

  • DID — Decentralized Identifiers for user identity management
  • DCC — Decentralized Communication Channel for peer-to-peer messaging
  • External Interface — Supports fetching and interacting with on-chain data

• Security Architecture

  • Hybrid Encryption using Curve25519 + AES
  • PASETO and JWT for external api authentication and session management
  • Tamper Resistance — Protects against unauthorized access and data modification
  • Integrity Checking — Validates message integrity via CRC/HMAC

🔧 Prerequisites

Before you start, make sure you have:

• Golang >= 1.25.0
• Docker (images will be pulled automatically from Docker Hub)
• Local setup (optional)
  • PostgreSQL server
  • Redis service

Download Build

You can download the lastest build here:

• Windows
• Linux

Get Started

[!WARNING]
If running locally, please verify you meet the prerequisites above.

• Docker
  • Run: docker-compose up --build
  • ShutDowan: docker-compose down
• Local
  • Window:
    • Build: go build -o build ./cmd/LCA/main.go
    • Run: ./build/main.exe
  • Linux:
    • Build: make build
    • Run: make run

Brief Sample

graph TD
    A[Node A] -->|Sign X25519 PubKey with Ed25519| B[Node B]
    A -->|Sign X25519 PubKey with Ed25519| C[Node C]
    B -->|Verify Signature & Create Private Channel| A
    C -->|Verify Signature & Create Private Channel| A
    C -->|Relay Communication| B

❓ Question

If you have any questions, please send me the ISSUE. I will personally understand and check if there are any omissions. Keep doing the best.

👨‍💻 Contributer

• Main Dev:
  • Name: Perry
  • Name: Aliz

📄 Licensing

This project, LightWeight Chat Application (LCA), is released under an open-source license to encourage collaboration, transparency, and innovation in decentralized secure communication systems. We currently use the following license: MIT License You are free to: Use, Copy, Modify, Merge, Publish, and Distribute the software Use it for personal, educational, or commercial purposes Provided that: You include the original copyright and license You provide attribution to the original authors For the full license text, refer to the LICENSE file in the repository.