Crypto Bank is a decentralized blockchain application that enables secure transactions between users. It allows users to create and manage transactions, mine blocks, and validate the blockchain. With a focus on transparency and security, Crypto Bank ensures the integrity of transaction records in a reliable digital currency platform.

• Create and manage transactions
• Mine new blocks
• Validate the blockchain
• View transaction history

• Python 3.x
• Flask
• Flask-CORS (for cross-origin requests)
• React (for frontend)

Clone this repository to your local machine using:

git clone https://github.com/Yash22222/CryptoBank.git

cd CryptoBank

1. Navigate to the backend directory:

   cd backend

2. Create a virtual environment (optional but recommended):

   python -m venv venv

3. Activate the virtual environment:

   • On Windows:

     venv\Scripts\activate

   • On macOS/Linux:

     source venv/bin/activate

4. Install the required dependencies:

   pip install -r requirements.txt

1. Navigate to the frontend directory:

   cd ../frontend

2. Install the frontend dependencies:

   npm install

1. Navigate back to the backend directory:

   cd ../backend

2. Run the Flask application:

   python app.py

   The backend server should start running at http://127.0.0.1:5000/.

1. Open a new terminal window and navigate to the frontend directory:

   cd CryptoBank/frontend

2. Start the React application:

   npm start

   The frontend will be accessible at http://localhost:3000/.

• GET /: Welcome message.
• GET /mine: Mine a new block.
• POST /transaction: Create a new transaction (provide JSON body).
• GET /chain: View the entire blockchain.
• GET /validate: Validate the blockchain.

Use Postman or any REST client to send a POST request to:

http://127.0.0.1:5000/transaction

With the following JSON body:

{
  "sender": "Alice",
  "recipient": "Bob",
  "amount": 10
}

Send a GET request to:

http://127.0.0.1:5000/mine

You will receive a JSON response indicating that a new block has been mined.

Send a GET request to:

http://127.0.0.1:5000/validate

This will return a response indicating whether the blockchain is valid or not.

Send a GET request to:

http://127.0.0.1:5000/chain

This will return the complete blockchain, showing all blocks and transactions.

After successfully creating a transaction or mining a block, you will receive a JSON response indicating the success of the operation. For example, after mining a block, you might see:

{
  "message": "New block mined successfully!",
  "block": {
    "index": 1,
    "transactions": [...],
    "proof": 12345,
    "previous_hash": "abcdef..."
  }
}

Crypto Bank demonstrates the practical implementation of blockchain technology, showcasing how transactions can be securely processed in a decentralized manner. It provides insights into the workings of cryptocurrencies and the fundamental concepts of blockchain.

This project is licensed under the MIT License - see the LICENSE file for details.