Moneyball Backend

Production-grade backend for prediction market trading platform with Polymarket integration, Solana permissions, and automated trading strategies.

Architecture

• Framework: NestJS (TypeScript)
• Database: PostgreSQL with Prisma ORM
• Cache/PubSub: Redis
• WebSockets: Socket.IO
• Queue: BullMQ (optional)
• Blockchain: Solana Web3.js

Core Domains

1. Market Domain: Normalized market data from Polymarket, Kalshi, and simulated sources
2. Conviction Strategy Domain: Automated thematic trading with real-time execution
3. Arbitrage Domain: Cross-market arbitrage detection and execution
4. Analytics Domain: PnL calculations, payoff curves, scenario modeling
5. Execution Domain: Immutable execution logs with Solana integration

Setup

# Install dependencies
npm install

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

# Set up database
npx prisma generate
npx prisma migrate dev

# Start development server
npm run start:dev

API Endpoints

Markets

• GET /markets - List all markets
• GET /markets/:id - Get market details

Conviction Strategies

• POST /conviction - Create strategy
• GET /conviction - List strategies
• POST /conviction/:id/pause - Pause strategy

Arbitrage

• GET /arbitrage/opportunities - List opportunities
• POST /arbitrage/simulate - Simulate arbitrage trade

Analytics

• GET /analytics/pnl - Get PnL metrics
• GET /analytics/payoff - Get payoff curves
• GET /analytics/scenario - Run scenario analysis

WebSocket Events

• /ws/markets - Real-time market updates
• /ws/conviction - Strategy execution events
• /ws/arbitrage - Arbitrage opportunity alerts

Development

• Deterministic calculations
• Financial correctness > speed
• Clear logs for every trade decision
• Idempotent and replayable execution