feat: rebuild fiscal clone architecture and harden coolify deployment
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@@ -1,174 +1,9 @@
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# Better Auth Migration
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# Better Auth Migration (Archived)
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## Overview
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Migrated from NextAuth v5 (beta) to Better Auth for unified authentication across both Elysia (backend) and Next.js (frontend).
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This document described the pre-2.0 incremental migration path.
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## Backend Changes
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### Installation
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- Added `better-auth@1.4.18` package
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- Added `pg@8.18.0` for PostgreSQL connection pool
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### New Files
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- `backend/src/auth.ts` - Better Auth instance configuration
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- `backend/src/routes/better-auth.ts` - Route handler for auth endpoints
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- `backend/src/better-auth-migrate.ts` - Database migration script
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### Modified Files
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- `backend/src/index.ts` - Replaced custom auth routes with Better Auth routes
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- Removed custom JWT-based authentication routes (`backend/src/routes/auth.ts` can be deleted after migration)
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### Database Schema
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New tables added:
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- `session` - Session management
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- `account` - OAuth/credential account storage
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- `verification` - Email verification tokens
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Existing `users` table extended with:
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- `email_verified` (BOOLEAN)
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- `image` (TEXT)
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### Migration Steps
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1. Run the migration script:
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```bash
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cd backend
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bun run src/better-auth-migrate.ts
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```
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2. Set environment variables:
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```env
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BETTER_AUTH_SECRET=<generate with: openssl rand -base64 32>
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BETTER_AUTH_URL=http://localhost:3001
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```
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## Frontend Changes
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### Installation
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- Added `better-auth` package (includes React client)
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### New Files
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- `frontend/lib/better-auth.ts` - Better Auth client instance
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### Modified Files
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- `frontend/lib/auth.ts` - Updated to use Better Auth session
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- `frontend/app/auth/signin/page.tsx` - Updated to use Better Auth methods
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- `frontend/app/auth/signup/page.tsx` - Updated to use Better Auth methods
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- Removed `frontend/app/api/auth/[...nextauth]/route.ts` - No longer needed
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### Authentication Methods
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Better Auth supports:
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- Email/password (`signIn.email`, `signUp.email`)
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- OAuth providers (`signIn.social`):
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- GitHub (`signIn.social({ provider: 'github' })`)
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- Google (`signIn.social({ provider: 'google' })`)
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### Session Management
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```typescript
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import { useSession } from '@/lib/better-auth';
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// In client components
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const { data: session } = useSession();
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```
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```typescript
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import { authClient } from '@/lib/better-auth';
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// In server components
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const { data: session } = await authClient.getSession();
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```
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## Environment Variables
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### Required
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```env
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# Backend
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DATABASE_URL=postgres://user:password@localhost:5432/fiscal
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BETTER_AUTH_SECRET=<32+ character random string>
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BETTER_AUTH_URL=http://localhost:3001
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# OAuth Providers
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GITHUB_ID=<your github client id>
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GITHUB_SECRET=<your github client secret>
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GOOGLE_ID=<your google client id>
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GOOGLE_SECRET=<your google client secret>
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# Frontend
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NEXT_PUBLIC_API_URL=http://localhost:3001
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```
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## API Endpoints
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Better Auth provides these endpoints automatically (mounted at `/api/auth/*`):
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### Email/Password
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- `POST /api/auth/sign-up/email` - Sign up with email
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- `POST /api/auth/sign-in/email` - Sign in with email
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- `GET /api/auth/get-session` - Get current session
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- `POST /api/auth/sign-out` - Sign out
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### OAuth
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- `GET /api/auth/sign-in/social` - Initiate OAuth flow
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- `GET /api/auth/callback/*` - OAuth callback handler
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### Session
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- `GET /api/auth/get-session` - Get current session
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- `POST /api/auth/update-session` - Update session data
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## Key Differences from NextAuth
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### NextAuth
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- Configuration in route handler (`app/api/auth/[...nextauth]/route.ts`)
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- Server-side session management with JWT
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- Custom callback for session/user data
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- Requires `signIn()` and `signOut()` from `next-auth/react`
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### Better Auth
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- Configuration in separate file (`backend/src/auth.ts`)
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- Server and client components unified API
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- Built-in session management with database storage
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- `signIn.email`, `signIn.social`, `signOut` from `better-auth/react`
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- Direct database access for user/session data
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## Testing Checklist
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- [ ] Run database migration: `bun run src/better-auth-migrate.ts`
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- [ ] Start backend server
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- [ ] Test email/password signup
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- [ ] Test email/password login
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- [ ] Test GitHub OAuth
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- [ ] Test Google OAuth
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- [ ] Test sign out
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- [ ] Test protected routes redirect to sign in
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- [ ] Test session persistence across page refreshes
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## Rollback Plan
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If issues arise, revert to NextAuth:
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1. Restore `frontend/app/api/auth/[...nextauth]/route.ts`
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2. Restore `frontend/app/auth/signin/page.tsx` and `frontend/app/auth/signup/page.tsx`
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3. Restore `frontend/lib/auth.ts`
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4. Remove `backend/src/auth.ts` and `backend/src/routes/better-auth.ts`
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5. Restore custom auth routes in backend
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## Benefits of Better Auth
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1. **Unified Auth** - Single auth system for both backend and frontend
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2. **Type Safety** - Better TypeScript support
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3. **Database-Backed Sessions** - More secure than JWT
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4. **Extensible** - Plugin system for 2FA, email verification, etc.
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5. **Active Development** - More frequent updates and improvements
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6. **Framework Agnostic** - Works with any backend framework
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## Future Improvements
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1. Enable email verification (Better Auth plugin)
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2. Add two-factor authentication (Better Auth plugin)
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3. Implement account management (password reset, email change)
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4. Add session management UI (view active sessions, revoke)
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5. Implement role-based access control (Better Auth plugin)
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## Resources
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- Better Auth Docs: https://www.better-auth.com/
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- Better Auth GitHub: https://github.com/better-auth/better-auth
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- Migration Guide: https://www.better-auth.com/docs/migration
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The codebase has been rebuilt for Fiscal Clone 2.0. Use these sources instead:
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- `README.md` for runtime and setup
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- `backend/src/auth.ts` for Better Auth configuration
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- `backend/src/db/migrate.ts` for current schema
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- `docs/REBUILD_DECISIONS.md` for architecture rationale
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