A DeFi platform that connects Zcash (ZEC) to multiple blockchain ecosystems. Privacy Bridge enables users to use ZEC for lending, staking, payments, and trading across chains via NEAR Protocol.
Prototype Notice: This project is currently a prototype and is not production-ready. It is intended for educational purposes, testing, and development.
Click the image above to watch the demo video
Use ZEC as collateral to borrow USDC on NEAR Protocol.
- Deposit ZEC via Defuse Bridge
- ZEC held in NEAR Intents contract
- Real-time pricing via Pyth Oracle
- Automated liquidation system
Stake ZEC into various DeFi protocols across chains.
- Marinade (Solana) - Liquid staking for SOL
- Jito (Solana) - MEV-powered staking
- Lido (Ethereum) - Liquid staking for ETH
- Linear (NEAR) - NEAR liquid staking
- Automatic conversion via OneClick SDK
Accept crypto payments and receive ZEC.
- Create payment requests with USD amounts
- Accept 100+ tokens across multiple chains
- Automatic conversion to ZEC shielded addresses
- QR codes and shareable payment links
Trade on prediction markets using ZEC.
- Access Polymarket from NEAR account
- Derived Polygon addresses via Chain Signatures
- Buy/sell outcome tokens
- Withdraw winnings to ZEC
Trade perpetual futures using ZEC.
- Access Hyperliquid from NEAR account
- Derived Arbitrum addresses via Chain Signatures
- Leverage trading up to 50x
- Deposit ZEC, withdraw to ZEC
┌─────────────────────────────────────┐
│ Privacy Bridge │
│ (NEAR-based) │
└─────────────────────────────────────┘
│
┌──────────────┬─────────────┬─────┴─────┬─────────────┬──────────────┐
│ │ │ │ │ │
▼ ▼ ▼ ▼ ▼ ▼
┌────────────┐ ┌────────────┐ ┌──────────┐ ┌─────────┐ ┌───────────┐ ┌────────────┐
│ Defuse │ │ NEAR │ │ Staking │ │Polymarket│ │Hyperliquid│ │ Payments │
│ Bridge │ │ Intents │ │ Protocols│ │ (Polygon)│ │ (Arbitrum)│ │ (Multi) │
└────────────┘ └────────────┘ └──────────┘ └─────────┘ └───────────┘ └────────────┘
│ │ │ │ │ │
▼ ▼ ▼ ▼ ▼ ▼
Zcash Lending Marinade Prediction Perpetual OneClick
Network Markets Jito Markets Futures SDK
Lido
Linear
| Component | Technology | Purpose |
|---|---|---|
| Defuse Bridge | Cross-chain bridge | ZEC deposits to NEAR |
| NEAR Intents | Token standard | Unified ZEC tokens on NEAR |
| Chain Signatures | MPC signing | Cross-chain transaction signing |
| OneClick SDK | Swap aggregator | Cross-chain token conversions |
| Pyth Oracle | Price feeds | Real-time asset prices |
- Runtime: Node.js 20 LTS
- Framework: Fastify with rate limiting and CORS
- Database: PostgreSQL 16 with Prisma ORM
- Queue: Redis with BullMQ
- Logging: Pino for structured JSON logs
- Framework: Next.js 14 with App Router
- UI: React 18, TailwindCSS, Lucide icons
- State: Zustand for client state, React Query for server state
- Wallets: NEAR Wallet Selector, Wagmi, Solana Wallet Adapter
- Language: Rust with NEAR SDK v5.5
- Standards: NEP-141 (Fungible Token)
- Testing: Workspaces-based integration tests
- Node.js 20 or higher
- Docker and Docker Compose
- Rust toolchain (for contracts)
- PostgreSQL 16
# Clone the repository
git clone https://github.com/collinsville22/privacybridge.git
cd privacy-bridge
# Run setup script
./scripts/setup-testnet.sh
# Start backend
cd backend && npm run dev
# Start frontend (new terminal)
cd frontend && npm run devThe frontend will be available at http://localhost:3000 and the API at http://localhost:3005.
| Method | Endpoint | Description |
|---|---|---|
| GET | /api/lending/markets |
Get lending markets |
| GET | /api/lending/prices |
Get asset prices |
| GET | /api/lending/accounts/:id/positions |
Get user positions |
| Method | Endpoint | Description |
|---|---|---|
| GET | /api/staking/protocols |
List staking protocols |
| POST | /api/staking/positions |
Create staking position |
| GET | /api/staking/positions/:account |
Get user positions |
| POST | /api/staking/unstake |
Initiate unstake |
| Method | Endpoint | Description |
|---|---|---|
| POST | /api/payments/create |
Create payment request |
| GET | /api/payments/:id |
Get payment details |
| GET | /api/payments/tokens |
List accepted tokens |
| POST | /api/payments/prepare-deposit |
Prepare deposit address |
| Method | Endpoint | Description |
|---|---|---|
| GET | /api/polymarket/events |
Get prediction events |
| GET | /api/polymarket/markets/:id |
Get market details |
| POST | /api/polymarket/orders |
Place order |
| GET | /api/polymarket/balances/:account |
Get balances |
| Method | Endpoint | Description |
|---|---|---|
| GET | /api/hyperliquid/meta |
Get exchange metadata |
| GET | /api/hyperliquid/prices |
Get all prices |
| POST | /api/hyperliquid/orders |
Place order |
| POST | /api/hyperliquid/deposit |
Create deposit |
| POST | /api/hyperliquid/withdraw |
Create withdrawal |
| Method | Endpoint | Description |
|---|---|---|
| POST | /api/defuse/deposit-address |
Get ZEC deposit address |
| GET | /api/intents/balance |
Get ZEC balance on NEAR |
| POST | /api/intents/collateral-tx |
Deposit to lending |
| POST | /api/intents/withdrawal-tx |
Withdraw ZEC |
privacy-bridge/
├── backend/ # API server
│ ├── src/
│ │ ├── config/ # Configuration
│ │ ├── routes/ # API endpoints
│ │ │ ├── lending.ts
│ │ │ ├── staking.ts
│ │ │ ├── payments.ts
│ │ │ ├── polymarket.ts
│ │ │ ├── hyperliquid.ts
│ │ │ ├── defuse.ts
│ │ │ └── intents.ts
│ │ ├── services/ # Business logic
│ │ │ ├── lending/ # Lending market
│ │ │ ├── staking/ # Staking protocols
│ │ │ ├── polymarket/ # Prediction markets
│ │ │ ├── hyperliquid/ # Perpetual futures
│ │ │ ├── defuse/ # Defuse bridge
│ │ │ ├── intents/ # NEAR Intents
│ │ │ ├── chain-signatures/ # MPC signing
│ │ │ ├── oneclick/ # Cross-chain swaps
│ │ │ └── liquidator/ # Lending liquidation
│ │ └── workers/ # Background jobs
│ └── prisma/ # Database schema
├── frontend/ # Web application
│ ├── app/
│ │ ├── lending/ # Lending page
│ │ ├── staking/ # Staking page
│ │ ├── trading/ # Trading page
│ │ ├── payment/ # Create payment
│ │ └── pay/[id]/ # Pay request
│ ├── components/ # React components
│ └── lib/ # Utilities
├── contracts/ # NEAR smart contracts
│ ├── lending-common/ # Shared lending types
│ └── lending-market/ # Lending market
├── docker/ # Docker configs
└── scripts/ # Setup scripts
| Variable | Description |
|---|---|
NETWORK |
Network: testnet or mainnet |
PORT |
API server port |
DATABASE_URL |
PostgreSQL connection |
REDIS_URL |
Redis connection |
NEAR_OPERATOR_PRIVATE_KEY |
NEAR operator key |
ONECLICK_JWT |
OneClick API token |
See .env.example for complete list.
| Chain | Faucet | Explorer |
|---|---|---|
| Zcash | TAZ Faucet | Explorer |
| NEAR | Testnet Faucet | NearBlocks |
| Solana | Devnet Faucet | Explorer |
This project is licensed under the MIT License - see the LICENSE file for details.
This software is provided "as is" without warranty of any kind. This is a prototype implementation intended for educational and testing purposes. Do not use with real funds without proper security audits.
- Author: Collins Ville
- Email: chiagoziemc7@gmail.com
- GitHub: @collinsville22