# Mana Core Auth - Implementation Summary

## Overview

The Mana Core Authentication and Credit System has been successfully implemented as a standalone NestJS service with PostgreSQL, JWT-based authentication, and a comprehensive credit management system.

## What Has Been Implemented

### 1. Project Structure ✅

```
mana-core-auth/
├── src/
│   ├── auth/
│   │   ├── dto/
│   │   │   ├── register.dto.ts
│   │   │   ├── login.dto.ts
│   │   │   └── refresh-token.dto.ts
│   │   ├── auth.controller.ts
│   │   ├── auth.service.ts
│   │   └── auth.module.ts
│   ├── credits/
│   │   ├── dto/
│   │   │   ├── use-credits.dto.ts
│   │   │   └── purchase-credits.dto.ts
│   │   ├── credits.controller.ts
│   │   ├── credits.service.ts
│   │   └── credits.module.ts
│   ├── common/
│   │   ├── decorators/
│   │   │   └── current-user.decorator.ts
│   │   ├── guards/
│   │   │   └── jwt-auth.guard.ts
│   │   └── filters/
│   │       └── http-exception.filter.ts
│   ├── config/
│   │   └── configuration.ts
│   ├── db/
│   │   ├── schema/
│   │   │   ├── auth.schema.ts
│   │   │   ├── credits.schema.ts
│   │   │   └── index.ts
│   │   ├── migrations/
│   │   │   └── 0000_lush_ironclad.sql
│   │   ├── connection.ts
│   │   └── migrate.ts
│   ├── app.module.ts
│   └── main.ts
├── postgres/
│   └── init/
│       ├── 01-init-schemas.sql
│       └── 02-init-rls.sql
├── scripts/
│   └── generate-keys.sh
├── Dockerfile
├── package.json
├── tsconfig.json
├── nest-cli.json
├── drizzle.config.ts
├── .env.example
├── .gitignore
└── README.md
```

### 2. Database Schema ✅

**Auth Schema:**

- `auth.users` - User accounts with soft delete support
- `auth.sessions` - Active sessions with device tracking
- `auth.passwords` - Separate password storage (bcrypt hashed)
- `auth.accounts` - OAuth provider accounts
- `auth.verification_tokens` - Email verification & password reset
- `auth.two_factor_auth` - 2FA configuration
- `auth.security_events` - Security audit log

**Credits Schema:**

- `credits.balances` - User credit balances with optimistic locking
- `credits.transactions` - Double-entry transaction ledger
- `credits.packages` - Credit pricing packages
- `credits.purchases` - Stripe purchase history
- `credits.usage_stats` - Usage analytics per app

**Key Features:**

- Row-Level Security (RLS) policies on all tables
- Optimistic locking for balance updates (prevents race conditions)
- Idempotency keys for transactions
- Proper indexing for performance

### 3. Authentication System ✅

**Endpoints Implemented:**

- `POST /api/v1/auth/register` - User registration
- `POST /api/v1/auth/login` - Login with credentials
- `POST /api/v1/auth/refresh` - Refresh access token
- `POST /api/v1/auth/logout` - Logout and revoke session
- `POST /api/v1/auth/validate` - Validate JWT token

**Security Features:**

- RS256 JWT algorithm (asymmetric keys)
- Access tokens: 15 minutes expiry
- Refresh tokens: 7 days expiry with rotation
- Session tracking with device information
- IP address and user agent logging
- Password hashing with bcrypt (cost factor: 12)
- Security events logging

### 4. Credit System ✅

**Endpoints Implemented:**

- `GET /api/v1/credits/balance` - Get current balance
- `POST /api/v1/credits/use` - Deduct credits
- `GET /api/v1/credits/transactions` - Transaction history
- `GET /api/v1/credits/purchases` - Purchase history
- `GET /api/v1/credits/packages` - Available packages

**Features:**

- Signup bonus: 150 free credits
- Daily free credits: 5 credits every 24 hours
- Automatic daily reset with transaction logging
- Usage priority: Free credits → Paid credits
- Optimistic locking prevents concurrent balance updates
- Idempotency protection for duplicate requests
- Complete audit trail via double-entry ledger

**Credit Pricing:**

- 100 mana = €1.00 (configurable)
- Stored as integer (euro cents) for precision

### 5. Docker Infrastructure ✅

**Services Configured:**

- **Traefik** - Reverse proxy with automatic SSL (Let's Encrypt)
- **PostgreSQL 16** - Database with SCRAM-SHA-256 auth
- **PgBouncer** - Connection pooling (transaction mode)
- **Redis 7** - Caching and rate limiting
- **Mana Core Auth** - The authentication service
- **Prometheus** - Metrics collection
- **Grafana** - Monitoring dashboards

**Docker Features:**

- Multi-stage Dockerfile (optimized build)
- Health checks for all services
- Volume persistence for data
- Network isolation
- Security: Non-root user, no privileged containers
- Production-ready configuration

### 6. Configuration & Environment ✅

**Environment Variables:**

- Database connection (PostgreSQL)
- Redis configuration
- JWT keys (RS256 public/private)
- Stripe integration (test/live keys)
- CORS origins
- Credit system settings
- Rate limiting configuration

**Configuration Files:**

- `.env.example` - Template with all variables
- `configuration.ts` - Type-safe config loading
- `docker-compose.yml` - Full stack orchestration

### 7. Security Features ✅

**Application Level:**

- Helmet.js security headers
- CORS protection
- Rate limiting (100 req/min per IP)
- Input validation with class-validator
- JWT signature verification
- Refresh token rotation

**Database Level:**

- Row-Level Security (RLS) policies
- Helper functions: `auth.uid()`, `auth.role()`
- Separate password table
- Soft deletes for users
- Security events logging

**Infrastructure Level:**

- Traefik rate limiting
- PostgreSQL SCRAM-SHA-256
- Redis password protection
- SSL/TLS via Let's Encrypt
- Connection pooling via PgBouncer

### 8. Additional Features ✅

**Scripts:**

- `generate-keys.sh` - Generate RS256 key pair
- Migration management via Drizzle Kit
- Docker health checks

**Documentation:**

- README.md - Complete setup guide
- API endpoint documentation
- Architecture overview
- Security considerations
- Development instructions

## What's Ready to Use

### Immediately Available

1. **User Registration & Authentication** ✅
   - Email/password registration
   - Login with JWT tokens
   - Token refresh mechanism
   - Session management

2. **Credit Balance Management** ✅
   - Check balance
   - Deduct credits
   - View transaction history
   - Automatic daily credits

3. **Database Migrations** ✅
   - Schema fully defined
   - Migration file generated
   - RLS policies configured
   - Indexes in place

4. **Docker Deployment** ✅
   - docker-compose.yml ready
   - All services configured
   - Production-ready setup
   - SSL/TLS automatic

## What Needs to Be Done (Next Steps)

### 1. Generate JWT Keys (Required)

```bash
cd mana-core-auth
./scripts/generate-keys.sh
# Copy the output to .env
```

### 2. Configure Environment Variables

```bash
cp .env.example .env
# Edit .env and add:
# - JWT keys (from step 1)
# - Stripe keys (from Stripe dashboard)
# - Database passwords
# - Redis password
# - Domain names
```

### 3. Start Development Environment

```bash
# Option A: Docker (recommended)
docker-compose up postgres redis -d
cd mana-core-auth
pnpm migration:run
pnpm start:dev

# Option B: Local PostgreSQL
# Make sure PostgreSQL and Redis are running locally
cd mana-core-auth
pnpm migration:run
pnpm start:dev
```

### 4. Test the API

```bash
# Register a user
curl -X POST http://localhost:3001/api/v1/auth/register \
  -H "Content-Type: application/json" \
  -d '{"email":"test@example.com","password":"Test1234!","name":"Test User"}'

# Login
curl -X POST http://localhost:3001/api/v1/auth/login \
  -H "Content-Type: application/json" \
  -d '{"email":"test@example.com","password":"Test1234!"}'

# Check balance (use token from login)
curl -X GET http://localhost:3001/api/v1/credits/balance \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN"
```

### 5. Future Implementation Tasks

**Phase 1: Stripe Integration**

- [ ] Implement Stripe payment intent creation
- [ ] Add webhook handler for payment events
- [ ] Create credit packages in database
- [ ] Add credit purchase endpoint
- [ ] Test payment flow end-to-end

**Phase 2: OAuth Providers**

- [ ] Configure OAuth providers (Google, GitHub, Apple)
- [ ] Add OAuth login endpoints
- [ ] Handle account linking
- [ ] Test social login flow

**Phase 3: Advanced Features**

- [ ] Implement 2FA setup and verification
- [ ] Add email verification system
- [ ] Create password reset flow
- [ ] Multi-session management UI
- [ ] Admin dashboard

**Phase 4: Shared Package**

- [ ] Create `@manacore/shared-auth` package
- [ ] Platform-agnostic auth service
- [ ] Auto-refresh logic
- [ ] Storage adapters (SecureStore, cookies)
- [ ] App-token generation

**Phase 5: Production Deployment**

- [ ] Set up VPS (Hetzner CPX31)
- [ ] Configure DNS records
- [ ] Deploy with docker-compose
- [ ] Set up monitoring alerts
- [ ] Configure backups
- [ ] Security audit

## API Documentation

### Authentication

| Endpoint                | Method | Auth   | Description               |
| ----------------------- | ------ | ------ | ------------------------- |
| `/api/v1/auth/register` | POST   | None   | Register new user         |
| `/api/v1/auth/login`    | POST   | None   | Login with credentials    |
| `/api/v1/auth/refresh`  | POST   | None   | Refresh access token      |
| `/api/v1/auth/logout`   | POST   | Bearer | Logout and revoke session |
| `/api/v1/auth/validate` | POST   | None   | Validate JWT token        |

### Credits

| Endpoint                       | Method | Auth   | Description         |
| ------------------------------ | ------ | ------ | ------------------- |
| `/api/v1/credits/balance`      | GET    | Bearer | Get current balance |
| `/api/v1/credits/use`          | POST   | Bearer | Deduct credits      |
| `/api/v1/credits/transactions` | GET    | Bearer | Transaction history |
| `/api/v1/credits/purchases`    | GET    | Bearer | Purchase history    |
| `/api/v1/credits/packages`     | GET    | Bearer | Available packages  |

## Technical Stack Summary

| Component       | Technology           | Version |
| --------------- | -------------------- | ------- |
| Framework       | NestJS               | 10.4.x  |
| Runtime         | Node.js              | 20+     |
| Package Manager | pnpm                 | 9.15.0  |
| Database        | PostgreSQL           | 16      |
| ORM             | Drizzle              | 0.38.x  |
| Cache           | Redis                | 7       |
| Payment         | Stripe               | 17.x    |
| Reverse Proxy   | Traefik              | 3.0     |
| Connection Pool | PgBouncer            | Latest  |
| Monitoring      | Prometheus + Grafana | Latest  |

## File Locations

- **Main Service:** `mana-core-auth/`
- **Docker Config:** `docker-compose.yml` (root)
- **Environment Template:** `.env.example` (root & package)
- **Database Migrations:** `mana-core-auth/src/db/migrations/`
- **API Documentation:** `mana-core-auth/README.md`
- **Master Plan:** `.hive-mind/MASTER_PLAN_CENTRAL_AUTH_SYSTEM.md`
- **Docker Guide:** `.hive-mind/DOCKER_DEPLOYMENT_GUIDE.md`

## Success Metrics

✅ **Core Implementation Complete**

- 12 database tables with RLS policies
- 10 API endpoints (5 auth + 5 credits)
- Docker deployment infrastructure
- Complete documentation
- Type-safe with TypeScript
- Security best practices applied

## Estimated Time to Production

Based on remaining tasks:

- JWT key generation: 5 minutes
- Environment configuration: 15 minutes
- Local testing: 30 minutes
- Stripe integration: 2-3 days
- Production deployment: 1 day
- Security audit: 2-3 days

**Total: ~1 week to production-ready**

## Support

For questions or issues:

1. Check README.md in the package
2. Review master plan in .hive-mind/
3. Contact the development team

---

**Status:** ✅ Core Implementation Complete - Ready for Testing & Stripe Integration

**Date:** 2025-11-25

**Implementation Time:** ~2 hours