MemeMint Backend

A NestJS backend for a Solana meme coin trading platform similar to "Baggs".

Features

• Authentication System: JWT-based authentication with registration and login
• User Management: User profiles with Solana wallet integration
• Database: PostgreSQL with Supabase integration
• Security: Password hashing with bcrypt, input validation
• Error Handling: Global exception filters and validation

Tech Stack

• Framework: NestJS with TypeScript
• Database: PostgreSQL (Supabase)
• ORM: TypeORM
• Authentication: JWT tokens with Passport.js
• Validation: class-validator and class-transformer
• Password Hashing: bcrypt

Setup

1. Install dependencies:

   npm install

2. Environment Configuration:

   • Copy config.example to .env
   • Fill in your Supabase credentials and other configuration

3. Database Setup:

   • Create a Supabase project
   • Get your database URL and API keys
   • Update the .env file with your credentials

4. Run the application:

   # Development
   npm run start:dev
   
   # Production build
   npm run build
   npm run start:prod

API Endpoints

Authentication

• POST /api/auth/register - User registration
• POST /api/auth/login - User login
• GET /api/auth/profile - Get user profile (protected)
• GET /api/auth/validate - Validate JWT token (protected)

Request/Response Examples

Registration

POST /api/auth/register
Content-Type: application/json

{
  "email": "user@example.com",
  "username": "trader123",
  "password": "SecurePass123!",
  "firstName": "John",
  "lastName": "Doe",
  "solanaWalletAddress": "9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM"
}

Login

POST /api/auth/login
Content-Type: application/json

{
  "usernameOrEmail": "trader123",
  "password": "SecurePass123!"
}

Response Format

{
  "user": {
    "id": "uuid",
    "email": "user@example.com",
    "username": "trader123",
    "firstName": "John",
    "lastName": "Doe",
    "solanaWalletAddress": "9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM",
    "balance": 0,
    "isActive": true,
    "isEmailVerified": false,
    "createdAt": "2024-01-01T00:00:00.000Z",
    "updatedAt": "2024-01-01T00:00:00.000Z"
  },
  "access_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..."
}

Environment Variables

# Database Configuration
DATABASE_URL=postgresql://username:password@localhost:5432/mememint
SUPABASE_URL=your_supabase_project_url
SUPABASE_ANON_KEY=your_supabase_anon_key
SUPABASE_SERVICE_ROLE_KEY=your_supabase_service_role_key

# JWT Configuration
JWT_SECRET=your_super_secret_jwt_key_here
JWT_EXPIRES_IN=7d

# Application Configuration
PORT=3000
NODE_ENV=development

Database Schema

Users Table

• id (UUID, Primary Key)
• email (String, Unique)
• username (String, Unique)
• password (String, Hashed)
• firstName (String, Optional)
• lastName (String, Optional)
• solanaWalletAddress (String, Optional)
• balance (Decimal, Default: 0)
• isActive (Boolean, Default: true)
• isEmailVerified (Boolean, Default: false)
• createdAt (Timestamp)
• updatedAt (Timestamp)

Security Features

• Password strength validation
• JWT token-based authentication
• Password hashing with bcrypt (12 rounds)
• Input validation and sanitization
• CORS configuration
• Global exception handling

Development

# Watch mode
npm run start:dev

# Debug mode
npm run start:debug

# Run tests
npm run test

# Run tests in watch mode
npm run test:watch

# Generate coverage report
npm run test:cov

Next Steps

This backend provides the foundation for a meme coin trading platform. You can extend it with:

• Solana blockchain integration
• Token creation and trading endpoints
• Real-time WebSocket connections
• Email verification system
• Admin panel
• Rate limiting
• Logging system
• API documentation with Swagger

License

This project is licensed under the UNLICENSED License.