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  \____|_| \_\|_| |_|    |_| \___/|_| \_|___/_/\_\

Cryptonix is a simple blockchain-based web application developed using C++, Javascript, Node.js, React.js, Firebase, and OpenSSL. The application is designed to provide a basic understanding of blockchain concepts such as transaction signing, Merkle trees, and a proof-of-work consensus algorithm. Users can create accounts, make secure transactions, view transaction history, and check balances, all hosted on a blockchain secured with cryptographic methods.

Table of Contents

Features

  • User Authentication: Users can sign up, log in, and securely access their accounts.
  • Transaction Functionality: Users can make transactions, which are securely signed and verified.S
  • Blockchain Integrity: Each block contains multiple transactions and is hashed using SHA-256, forming a secure chain with Merkle trees for efficient transaction hashing.
  • Proof of Work: Blocks are added based on a proof-of-work consensus, which secures the chain by requiring computational effort to validate blocks.
  • Transaction History and Balance: Users can view their transaction history and balance within the application dashboard.

Technologies

  • Backend: C++ (core blockchain logic, transaction handling), Node.js (REST API)
  • Frontend: Node.js (React for UI)
  • Database: Firebase Firestore (user and transaction data)
  • Cryptography: OpenSSL (SHA-256, signature generation and verification)
  • Hashing and Consensus: Merkle trees and proof-of-work consensus algorithm

Setup and Installation

Prerequisites

  • Node.js and npm
  • OpenSSL
  • Firebase account for authentication and database setup

Installation Steps

  1. Clone the Repository:

    git clone https://github.com/Rk1805/DSA_Project_BlockChain.git

  2. Install Backend Dependencies:

    npm install

  3. Install Frontend Dependencies: Navigate to the frontend directory and run:

    npm install

  4. Configure Firebase:

    • Set up Firebase for user authentication and Firestore database.
    • Add your Firebase configuration in firebase.js.

  5. Run Backend:

    npm start

  6. Run Frontend:

    npm run dev

Usage

  1. Sign Up and Login:

    • Create a user account via the signup page.
    • Log in with registered credentials to access the dashboard.

  2. Dashboard Features:

    • Make a Transaction: Specify recipient, amount, and initiate transactions.
    • Transaction History: View a history of previous transactions.
    • Get Balance: Check current balance based on transactions in the blockchain.

Blockchain Implementation Details

  • Merkle Tree: Each block contains a Merkle root of transaction hashes, ensuring integrity and efficient verification.
  • Proof of Work: Blocks are added only after a valid proof-of-work hash is found, helping secure the chain.
  • Transaction Signing: Transactions are cryptographically signed using OpenSSL, ensuring sender verification.
  • Block Structure: Each block contains a previous block hash, Merkle root, and the current block’s transactions, forming a linked list structure.

Future Improvements

  • Implementing additional cryptographic mechanisms for enhanced security.
  • Improving consensus efficiency and experimenting with other algorithms.
  • Expanding functionality to handle multiple cryptocurrencies or digital assets.
  • Adding an enhanced front-end UI for better user experience.

This application provides a simplified but functional implementation of blockchain concepts, focusing on secure transactions and data integrity. For more in-depth details, refer to the individual files in each directory.