BetterAuth Implementation:

• ✅ Password Hashing: BetterAuth uses bcrypt for password hashing with salt rounds
• ✅ Session Management: 7-day expiration with 1-day update cycle (prevents token staleness)
• ✅ Email Verification: Required before account activation
• ✅ OAuth 2.0: Google and GitHub OAuth with proper PKCE flow
• ✅ CSRF Protection: Built into Next.js 15 and BetterAuth
• ✅ HTTP-only Cookies: Sessions stored in HTTP-only cookies (not accessible to JavaScript)

Turso/LibSQL Security:

• ✅ End-to-End Encrypted: Transport security with TLS 1.3
• ✅ Authentication Tokens: Per-database tokens with granular permissions
• ✅ Row-Level Security: Can be implemented via application layer
• ✅ Encrypted at Rest: Turso provides encryption for all stored data
• ✅ Edge Distribution: Global replication with regional encryption

ConvexDB Security:

• ✅ Automatic Authentication: Built-in user context in queries
• ✅ Permission System: Server functions validate user permissions
• ✅ Real-time Security: Subscriptions respect user permissions
• ✅ API Keys: Secure API key generation for service-to-service auth

Next.js 15 Security Headers (configured in next.config.ts):

X-Frame-Options: DENY                 # Prevent clickjacking
X-Content-Type-Options: nosniff       # Prevent MIME sniffing
Referrer-Policy: origin-when-cross-origin  # Control referrer

Deployment (Vercel):

• ✅ DDoS Protection: Vercel's global network includes DDoS mitigation
• ✅ SSL/TLS: Automatic HTTPS for all deployments
• ✅ WAF: Web Application Firewall protection
• ✅ Rate Limiting: Built-in rate limiting on API routes
• ✅ Environment Variables: Encrypted secrets management

BetterAuth API Routes (/api/auth/[...all]):

• ✅ Rate Limiting: Configure in production
• ✅ Input Validation: Zod schema validation
• ✅ CORS: Properly configured for your domain
• ✅ Method Validation: POST/GET validation per endpoint

Drizzle ORM:

• ✅ Type-Safe Queries: TypeScript prevents SQL injection
• ✅ Parameterized Queries: All queries use prepared statements
• ✅ Schema Validation: Zod integration for runtime validation

Zod Schemas (setup ready):

// Example for additional validation
import { z } from "zod";

export const createUserSchema = z.object({
  email: z.string().email(),
  name: z.string().min(2).max(100),
  password: z.string().min(8),
});

1. Generate Strong Secrets

   openssl rand -base64 32  # BETTER_AUTH_SECRET

2. Enable Email Verification

   • Currently enabled in auth.ts
   • Configure SMTP for production

3. Rate Limiting

   // Add to API routes
   import { Ratelimit } from "@upstash/ratelimit";

4. API Key Security

   • Hash API keys before storage
   • Rotate keys regularly
   • Monitor key usage

5. Audit Logging

   • All admin actions logged to adminAuditLogs
   • Review logs regularly
   • Archive old logs

6. Environment Variables

   • Never commit .env.local
   • Use Vercel's environment variable management
   • Rotate secrets quarterly

7. CORS Configuration Update next.config.ts:

   async headers() {
     return [{
       source: '/api/(.*)',
       headers: [
         { key: 'Access-Control-Allow-Origin', value: process.env.ALLOWED_ORIGIN },
         { key: 'Access-Control-Allow-Methods', value: 'GET,POST,PUT,DELETE' },
       ],
     }];
   }

✅ Headless CMS: Provides content API without coupled frontend ✅ Type-Safe: Full TypeScript support matches your backend ✅ Database Agnostic: Works with Turso/SQLite without issues ✅ Access Control: Built-in role-based access control ✅ REST & GraphQL: Multiple API options ✅ Webhook Support: Integrates with ConvexDB for sync

Option 1: Unified Authentication (Recommended)

// In payload.config.ts
import { auth } from "@/lib/auth";

export default buildConfig({
  // ...
  middleware: [
    async (req, res, next) => {
      // Check BetterAuth session
      const session = await auth.api.getSession({
        headers: req.headers,
      });

      if (session?.user?.isSuperAdmin) {
        // Allow admin access to PayloadCMS
        req.user = session.user;
      }
      next();
    },
  ],
});

Option 2: Separate PayloadCMS Auth

// PayloadCMS has its own built-in authentication
// Use email/password credentials separate from main app
// Can sync users between systems

1. Create Separate Database for PayloadCMS

   turso db create bytestack-cms
   turso db tokens create bytestack-cms

2. Environment Variables

   PAYLOAD_TURSO_URL=libsql://your-cms-db.turso.io
   PAYLOAD_TURSO_TOKEN=your_cms_token
   PAYLOAD_SECRET=your_payload_secret  # For encryption

3. Access Control in PayloadCMS

   // In collections/Posts.ts
   access: {
     read: ({ req }) => {
       if (req.user?.role === 'admin') return true;
       return { author: { equals: req.user?.id } };
     },
     update: ({ req }) => req.user?.role === 'admin',
     delete: ({ req }) => req.user?.role === 'superadmin',
   }

ConvexDB → Turso Sync (via DataSyncService):

1. User creates content in app
2. ConvexDB updates real-time
3. Sync service periodically syncs to Turso
4. PayloadCMS reads from Turso

PayloadCMS → ConvexDB Sync (webhook):

1. Admin updates content in PayloadCMS
2. Webhook notifies app
3. App updates ConvexDB
4. Real-time updates propagate

// src/lib/payload-integration.ts
import payload from "payload";

export async function syncContentToConvex() {
  // Get all posts from PayloadCMS
  const posts = await payload.find({
    collection: "posts",
  });

  // Update ConvexDB via mutation
  for (const post of posts.docs) {
    // Your ConvexDB sync logic
  }
}

Before going to production:

• Enable email verification in production SMTP
• Generate new BETTER_AUTH_SECRET for production
• Configure rate limiting for API routes
• Set up monitoring and alerting
• Enable audit logging for admin actions
• Configure CORS properly for your domain
• Set up regular security updates for dependencies
• Enable 2FA for superadmin accounts
• Configure backup strategy for Turso databases
• Set up penetration testing
• Review and test PayloadCMS access controls
• Document security procedures for team

• OWASP Top 10
• Next.js Security Best Practices
• BetterAuth Security
• Turso Security
• PayloadCMS Access Control