🪙 Full-Stack Crypto Exchange Platform

A comprehensive, centralized crypto exchange platform built from scratch with a modern tech stack. This project features a complete user authentication system, multiple trading interfaces, real-time data integration, and a full-featured admin panel.

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Live Demo

• Frontend (Vercel): https://crypto-exchange-4tmi7izaw-saikrishnacreats-projects.vercel.app/
• Backend (Render): https://crypto-exchange-h0aw.onrender.com/

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✨ Core Features

• Secure User Authentication: Full registration and login flow using JWTs and password hashing with bcrypt.
• Protected Routes: Secure dashboard and trading pages accessible only to authenticated users.
• Live Spot Trading: UI fetches real-time crypto prices from a Chainlink oracle via the backend for trade calculations.
• P2P Trading: Peer-to-peer market where users can create and view trade offers.
• Crypto Deposits & Withdrawals:
  • Unique deposit addresses generated for each user.
  • Backend listener service watches the blockchain for user deposits.
  • Secure withdrawal system sends on-chain transactions from the exchange's hot wallet.
• Admin Panel: Protected area for administrators to view, manage, and edit all users on the platform.

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🛠️ Tech Stack

Backend

• Framework: Node.js, Express.js
• Language: TypeScript
• Database: PostgreSQL
• ORM: Prisma
• Blockchain Interaction: Ethers.js, Chainlink Contracts
• Authentication: JWT, bcrypt
• Deployment: Render

Frontend

• Framework: Next.js (App Router)
• Language: TypeScript
• Styling: Tailwind CSS
• State Management: React Hooks (useState, useEffect)
• Deployment: Vercel

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🚀 Getting Started

Prerequisites

• Node.js (v18+)
• npm or yarn
• PostgreSQL (running instance, e.g., Supabase)

1. Clone the Repository

git clone https://github.com/your-username/crypto-exchange.git
cd crypto-exchange

2. Backend Setup

# Navigate to the server directory
cd server

# Install dependencies
npm install

# Create a .env file from the example
cp .env.example .env

# Run database migrations to create tables
npx prisma migrate dev

# Run the development server
npm run dev

3. Frontend Setup

# Navigate to the client directory from the root
cd client

# Install dependencies
npm install

# Create a .env.local file for the frontend
cp .env.local.example .env.local

# Run the development server
npm run dev

Your application should now be running, with the frontend on http://localhost:3000 and the backend on http://localhost:3001.

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⚙️ Environment Variables

You will need to create .env files for both the client and server.

Backend (/server/.env)

Variable	Description
DATABASE_URL	Your PostgreSQL connection string (e.g., from Supabase).
JWT_SECRET	A long, random string for signing authentication tokens.
SEPOLIA_RPC_URL	RPC URL for the Sepolia testnet (e.g., from Alchemy).
HOT_WALLET_PRIVATE_KEY	Private key of the exchange's wallet for withdrawals.

Frontend (/client/.env.local)

Variable	Description
NEXT_PUBLIC_API_URL	URL of your backend API (http://localhost:3001 for local dev).