1. User Management Service

• Function: Handles user registration, authentication, and account management.
• Why It's Important: Central to ensuring only authenticated and authorized users can buy coins, make transactions, and access their balances.
• Multi-Tenancy: Each tenant will have its own user database, ensuring that user data is isolated per platform.
• Security: Strong authentication (OAuth2, JWT) and secure password storage (hashing).
• Key Features:
  • Register/Login: Users can sign up and log in using email/password or OAuth (Google/Facebook).
  • Multi-Tenant Authentication: Tenant-specific authentication, where users have accounts only in their respective tenants (platforms).
  • Password Reset: Secure password recovery using email tokens.
• Endpoints:
  • POST /register: Create a new user.
  • POST /login: User login, returns JWT token.
  • GET /profile: Retrieve user profile information (can also return coin balance here).
• Technologies:
  • OAuth2, JWT for authentication.
  • PostgreSQL for multi-tenant user data (tenant-specific schemas).
  • Hashing (bcrypt) for secure password storage.

2. Coin/Wallet Management Service

• Function: Manages the virtual coin (credits) balance for users, allowing them to purchase coins and use them for transactions. It also tracks coin history (top-ups, usage).
• Why It's Important: This is the core of your project, as it handles the "currency" in the system. Users need to top up their balance, make payments, and check their balance securely.
• Multi-Tenancy: Coin balances, transaction logs, and wallet history are tenant-specific.
• Security: Secure transactions (encryption), anti-fraud mechanisms (e.g., rate-limiting, IP checks).
• Key Features:
  • Buy Coins: Allow users to top-up their wallet with real money or in-app currency.
  • Track Coin Balance: User-specific, tenant-specific, and transaction-specific balances.
  • Transaction History: Log each transaction for auditing and user history (coin spent, time, transaction ID).
  • Refund/Recharge: Users can reverse or recharge their wallets if needed.
• Endpoints:
  • POST /wallet/buy: Allow users to buy coins (could integrate with a payment service like Stripe or PayPal).
  • GET /wallet/balance: Retrieve current coin balance.
  • GET /wallet/transactions: List of transactions made with coins (spend, refund, etc.).
• Technologies:
  • Redis for fast in-memory caching of user balances.
  • MongoDB/PostgreSQL for transactional logs and history.
  • Stripe/PayPal Integration for payment processing.

3. Microtransaction Service