🎓 Blockchain Certificate Verification System

This project is a decentralized application (DApp) built with Flask, Solidity, and IPFS, allowing institutions to issue and verify academic certificates using the blockchain.

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🚀 Features

• Admin login with MetaMask
• Upload certificate to IPFS
• Store metadata on blockchain
• Student login with wallet
• Verify, view, download, and share certificates

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🛠️ Technologies Used

• Solidity (Smart Contract)
• Flask (Backend)
• HTML/CSS/JS
• IPFS (Certificate storage)
• Web3.js & MetaMask

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🖼️ Project Screenshots

🧑‍💼 Admin Dashboard

🗂️ Upload Certificate

🦊 MetaMask Login

🎓 Student Dashboard

✅ Certificate Verification System

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📁 Folder Structure

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├── app.py                      # Flask backend
├── contracts/                 # Solidity smart contracts
│   └── CertificateVerification.sol
├── frontend/                  # Frontend templates and static files
│   ├── templates/
│   │   ├── admin_dashboard.html
│   │   ├── student_dashboard.html
│   └── static/
│       └── css, js, images...
├── images/                    # Screenshots used in README
├── .env                       # Environment variables (ignored in .gitignore)
├── README.md                  # Project documentation
└── requirements.txt           # Python dependencies

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⚙️ Setup Instructions

1. 🔧 Clone the repository

git clone https://github.com/Spandana-MJ/blockchain-certificate-verification.git
cd blockchain-certificate-verification

2. 📦 Install backend dependencies

pip install -r requirements.txt

3. 🔗 Compile & deploy smart contract (using Hardhat or Remix)

• Compile CertificateVerification.sol
• Deploy to a local or test Ethereum network (e.g. Ganache or Polygon Mumbai)
• Copy the deployed contract address and ABI

4. 📝 Create .env file

CONTRACT_ADDRESS=your_deployed_contract_address
WEB3_PROVIDER=https://your_rpc_provider
PINATA_API_KEY=your_pinata_key
PINATA_SECRET_API_KEY=your_pinata_secret

Make sure .env is listed in .gitignore

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▶️ Run the Application

python app.py

Access it at: http://127.0.0.1:5000

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🧪 Usage Flow

1. Admin logs in via MetaMask
2. Uploads a certificate → stored on IPFS
3. Smart contract stores metadata
4. Student logs in via wallet → can view, verify, and download the certificate

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📌 Future Enhancements

• Email notifications to students
• Multi-user role support
• Add QR code for certificate verification
• Deploy on Ethereum mainnet or Polygon

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🙌 Acknowledgements

• Web3.py
• Pinata
• MetaMask
• IPFS
• Ethereum