Crypto Exchange Development: Order Book, Liquidity, and Trading Engine

Building a crypto exchange requires a high-performance matching engine, real-time data distribution, and a professional trading interface.

Order Book Data Structure

interface Order { id: string; pair: string; side: 'buy'|'sell'; price: number; amount: number; filled: number }

class OrderBook {
  bids: Map<number, Order[]> = new Map()
  asks: Map<number, Order[]> = new Map()

  addOrder(order: Order) {
    const book = order.side === 'buy' ? this.bids : this.asks
    const existing = book.get(order.price) || []
    existing.push(order)
    book.set(order.price, existing)
  }

  getBestBid(): Order | null {
    const prices = Array.from(this.bids.keys()).sort((a, b) => b - a)
    return prices.length ? this.bids.get(prices[0])![0] : null
  }
}

Real-Time Broadcasting via WebSockets

import { WebSocketServer } from 'ws'
const wss = new WebSocketServer({ port: 8080 })
wss.on('connection', (ws) => {
  ws.on('message', (data) => handleClientMessage(JSON.parse(data.toString())))
})

Trading UI Components

Order book with depth visualization, TradingView lightweight charts, order entry form, open orders table, trade history, and balance display.

The Bottom Line

The Crypto Exchange UI from BreafIO provides a complete trading interface. The Crypto Portfolio Tracker helps track holdings. The Blockchain Explorer verifies transactions. The Web3 Auth Kit handles wallet connection, and the Crypto Payment Gateway enables deposits/withdrawals.