# NIN Terminal - Technical Documentation

## 1. System Architecture

### 1.1 Frontend Architecture
- **Framework**: Next.js 15+ (App Router)
- **State Management**: React Context API
- **UI Components**: Custom components with Tailwind CSS
- **Real-time Data**: WebSocket connections for market data
- **Charts**: Custom Lightweight-charts for performance optimization

### 1.2 Backend Services
- **API Layer**: Next.js API routes
- **WebSocket Servers**: Custom WebSocket implementation for real-time data
- **Authentication**: OAuth 2.0 with broker integration
- **Database**: Serverless database architecture

## 2. Core Components

### 2.1 Trading Interface
```typescript
// Components Structure
/components/Exchange/
  ├── TradingChart.tsx      // Advanced charting with technical indicators
  ├── OrderBook.tsx         // Real-time order book visualization
  ├── TradeForm.tsx         // Order entry and execution
  ├── DepthChart.tsx        // Market depth visualization
  └── MarketStats.tsx       // Real-time market statistics

2.2 Market Data System

• Data Sources:
  • Primary: Direct exchange feeds
  • Secondary: Broker APIs
  • Fallback: Third-party data providers
• Data Processing Pipeline:
  1. Raw data ingestion
  2. Normalization
  3. Real-time processing
  4. Distribution via WebSocket

2.3 Order Management

// Order Flow
interface Order {
  type: 'MARKET' | 'LIMIT' | 'SL' | 'SL-M';
  side: 'BUY' | 'SELL';
  quantity: number;
  price?: number;
  stopPrice?: number;
  validity: 'DAY' | 'IOC';
}

// Validation Pipeline
1. Pre-validation
2. Risk check
3. Margin verification
4. Exchange submission
5. Order tracking

3. Integration Points

3.1 Broker Integration

// Broker Connector Interface
interface BrokerConnector {
  connect(): Promise<void>;
  placeOrder(order: Order): Promise<OrderResponse>;
  getPositions(): Promise<Position[]>;
  getHoldings(): Promise<Holding[]>;
  getMargins(): Promise<MarginDetails>;
}

3.2 Market Data Integration

• WebSocket connections for real-time data
• REST APIs for historical data
• Heartbeat mechanism for connection health
• Automatic reconnection strategy

4. Security Implementation

4.1 Authentication Flow

// Authentication Process
1. Broker OAuth initiation
2. Authorization code receipt
3. Token exchange
4. Secure token storage
5. Automatic token refresh

4.2 Data Security

• End-to-end encryption for sensitive data
• Rate limiting on API endpoints