Go-Chain is a custom cryptocurrency blockchain implementation with transaction management and validation. This project includes the following features and components. 👇

• A custom cryptocurrency blockchain.
• Transaction management and validation.

• Managed transactions before adding them to a block.
• Created and tracked reward transactions in the transaction pool.

• Validated transactions to ensure they follow specified rules.

• Supported multiple nodes with blockchain synchronization.
• Utilized Redis for network communication.

• Stored the blockchain, blocks and transactions in a MongoDB database.

• Implemented user registration and login.
• Used JSON Web Tokens (JWT) for user validation.
• Stored user information in MongoDB.

• Developed a client application using React with Vite.
• Enabled the creation of new transactions.
• Listed transactions and blocks.
• Provided functionality to mine blocks with transactions.

• TDD for transaction management.
• Followed best practices: Clean Code, Separation of Concerns (SOC) and Model-View-Controller (MVC).
• Secured the server against various attacks, including NoSQL injections, DDOS and XSS attempts.

To run this project locally, follow these steps:

1. Clone the repository:

   git clone https://github.com/codebatine/gochain.git
   cd gochain

2. Install dependencies for both backend and frontend:

   cd backend
   npm i
   cd ../frontend
   npm i

3. Run Redis server:

   redis-server

4. Set up MongoDB:

   Make sure you have MongoDB installed and running on your local machine.

5. Add environment variables:

   Create a file named .env in the backend/config directory with the following content:

   NODE_ENV=development
   PORT=5000
   MONGO_URI=your_mongo_uri_here
   JWT_SECRET=your_jwt_secret_here
   JWT_TTL=90d
   JWT_COOKIE_TTL=90d
   REDIS_HOST=localhost
   REDIS_PORT=6379

6. Start the backend and frontend servers:

   Open two terminal windows or tabs and run the following commands in each:

   In the first terminal (backend):

   cd backend
   npm run dev

   In the second terminal (frontend):

   cd frontend
   npm run dev

   7. Run tests in backend:

   To run tests for the backend, use the following command:

   cd backend
   npm test

1. Register and log in:

   • Create a new user account and log in to access the blockchain features.

2. Create transactions:

   • Use the client application to create and send new transactions.

3. Mine blocks:

   • Mine blocks to add transactions to the blockchain and receive rewards.

4. View blockchain:

   • Explore the blockchain, view transactions and monitor blocks.

Here are some screenshots of the Go-Chain application in action: