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ZeroData

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ZeroData is a decentralized data-sharing network powered by zero-knowledge proofs. It allows users to prove the validity of their data without exposing the raw information.

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# ZeroData

A decentralized data-sharing network powered by zero-knowledge proofs. ZeroData allows users to prove the validity of their data without exposing the raw information, enabling secure and private data transactions in a decentralized ecosystem.

## Features

- **Privacy-Preserving Data Sharing**: Use zero-knowledge proofs to verify data without revealing it
- **Decentralized Storage**: Data encrypted and stored on IPFS/Arweave
- **Smart Contract Integration**: Ethereum-based access control and payment settlement
- **DID Identity Management**: Decentralized identity for secure authentication
- **Data Trading Market**: Transparent data transactions with ERC-20 token payments
- **DAO Governance**: Community-driven decision making

## Architecture

### Core Components

1. **Blockchain Layer**: Ethereum L2 (StarkNet/zkSync) for cost efficiency
2. **Cryptography Layer**: zk-SNARKs/zk-STARKs for zero-knowledge proofs
3. **Storage Layer**: IPFS/Arweave for encrypted data storage
4. **Client SDK**: Cross-language SDKs for easy integration

### Smart Contracts

- `DataRegistry`: Manages data metadata and proofs
- `AccessControl`: Handles permission management
- `PaymentSettlement`: Processes data transactions

## Getting Started

### Prerequisites

- Node.js >= 16.0.0
- Git
- Ethereum wallet (MetaMask recommended)

### Installation

```bash
# Clone the repository
git clone https://github.com/jeanettaskafidas/ZeroData.git
cd ZeroData

# Install dependencies
npm install

# Set up environment variables
cp .env.example .env
# Edit .env with your configuration

# Start the development server
npm run dev
```

### Environment Variables

Create a `.env` file with the following variables:

```env
PORT=3000
NODE_ENV=development
ETHEREUM_RPC_URL=https://goerli.infura.io/v3/YOUR_PROJECT_ID
IPFS_API_URL=http://localhost:5001
DATABASE_URL=mongodb://localhost:27017/zerodata
REDIS_URL=redis://localhost:6379
JWT_SECRET=your-jwt-secret
```

## Usage

### Upload Data

```javascript
const { ZeroDataClient } = require('zerodata-sdk');

const client = new ZeroDataClient({
  rpcUrl: process.env.ETHEREUM_RPC_URL,
  privateKey: process.env.PRIVATE_KEY
});

// Upload encrypted data
const result = await client.uploadData({
  data: "sensitive information",
  accessPolicy: "public",
  price: "1000000000000000000" // 1 token in wei
});
```

### Verify Data Access

```javascript
// Generate zero-knowledge proof
const proof = await client.generateProof({
  dataHash: result.dataHash,
  accessor: "0x...",
  conditions: ["age > 18", "verified == true"]
});

// Verify proof without revealing data
const isValid = await client.verifyProof(proof);
```

## Development

### Project Structure

```
src/
├── contracts/          # Smart contracts
├── circuits/           # Zero-knowledge proof circuits
├── services/           # Core business logic
├── utils/              # Utility functions
├── middleware/         # Express middleware
├── routes/             # API routes
└── tests/              # Test files
```

### Running Tests

```bash
npm test
```

### Building

```bash
npm run build
```

## Contributing

1. Fork the repository
2. Create a feature branch (`git checkout -b feature/amazing-feature`)
3. Commit your changes (`git commit -m 'feat: add amazing feature'`)
4. Push to the branch (`git push origin feature/amazing-feature`)
5. Open a Pull Request

## Tokenomics

The ZeroData ecosystem uses a native ERC-20 token for:

- **Data Transactions**: Payment for data access
- **Node Incentives**: Rewards for storage and validation nodes
- **Governance**: DAO voting rights

### Incentive Structure

- **Data Providers**: Earn tokens for sharing valuable data
- **Validators**: Receive rewards for proof computation services
- **Storage Nodes**: Get stable income for long-term data storage

## Security

- All smart contracts undergo third-party security audits
- GDPR/CCPA compliant data handling
- Data abuse reporting and arbitration mechanisms
- Regular security updates and patches

## Roadmap

- [x] **Phase 1 (MVP)**: Data upload, encryption, and ZKP verification
- [ ] **Phase 2**: Data trading market and incentive mechanisms
- [ ] **Phase 3**: DID integration and multi-chain interoperability
- [ ] **Phase 4**: DAO governance and developer ecosystem

## License

This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.

## Support

- Documentation: [docs.zerodata.io](https://docs.zerodata.io)
- Discord: [discord.gg/zerodata](https://discord.gg/zerodata)
- Twitter: [@ZeroDataProtocol](https://twitter.com/ZeroDataProtocol)

## Acknowledgments

- Circom for zero-knowledge proof circuits
- IPFS for decentralized storage
- Ethereum Foundation for blockchain infrastructure

ZeroData

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