Phase 1 & 2 Complete: Payment Processor Abstraction Layer

✅ What's Been Completed

Phase 1: Abstraction Layer (DONE)

1. Base Interface - app/services/payment_processors/base.rb

   • Standard interface all processors must implement
   • Methods: create_customer_profile, create_payment_token, authorize_payment, capture_authorization, refund_transaction, void_authorization
   • Error handling and logging built-in

2. Authorize.Net Adapter - app/services/payment_processors/authorize_net_adapter.rb

   • Wraps existing AuthorizeNetPaymentService
   • Implements all base interface methods
   • Maintains backwards compatibility
   • Added convenience method process_payment_with_nonce for current flow

3. Payment Processor Factory - app/services/payment_processor_factory.rb

   • Routes to correct adapter based on configuration
   • Methods: default, for(processor_name), for_customer(customer), for_order(order)
   • Supports per-customer processor selection

4. Controller Updates - app/controllers/app/quotes_controller.rb

   • Replaced direct AuthorizeNetPaymentService calls with factory
   • Now processor-agnostic

Phase 2: Database Schema (DONE)

1. PaymentProfile Migration - db/migrate/..._add_processor_columns_to_payment_profiles.rb

   • Added: processor, processor_customer_id, processor_token_id
   • Made old Authorize.Net columns optional
   • Backfills existing records with processor='authorize_net'
   • Added indexes for performance

2. PaymentTransaction Migration - db/migrate/..._add_processor_columns_to_payment_transactions.rb

   • Added: processor, processor_transaction_id, metadata (jsonb)
   • Made old Authorize.Net column optional
   • Backfills existing records
   • Added indexes including GIN index on metadata

3. Model Updates

   • PaymentProfile: Added processor validations and scopes
   • PaymentTransaction: Added processor validations and scopes

🔧 What You Need to Do Now

1. Run Database Migrations

# Stop your dev server first (Ctrl+C)
bin/rails db:migrate

This will:

• Add new processor columns to payment_profiles and payment_transactions
• Backfill existing records with processor='authorize_net'
• Make old Authorize.Net columns optional

2. Test the Abstraction Layer

Test a payment flow to ensure Authorize.Net still works through the adapter:

1. Start dev server: bin/dev
2. Go to payment page: https://app.quarryrents.com/order/{token}/payment
3. Submit a test payment with Accept.js
4. Verify it processes correctly
5. Check logs for [AUTHORIZE_NET] prefix from the adapter

3. Check for Any Breaking Changes

The refactoring should be backwards compatible, but verify:

• [ ] Payment profiles save correctly
• [ ] Payment transactions save correctly
• [ ] Authorization flow works
• [ ] Capture flow works (when order is delivered)
• [ ] Refund flow works

📁 New File Structure

app/
├── services/
│   ├── payment_processors/
│   │   ├── base.rb                    # Base interface
│   │   ├── authorize_net_adapter.rb   # Authorize.Net adapter
│   │   └── fiserv_adapter.rb         # TODO: Next phase
│   ├── payment_processor_factory.rb   # Factory for routing
│   └── authorize_net_payment_service.rb  # Original service (still used by adapter)
├── controllers/
│   └── app/
│       └── quotes_controller.rb       # Updated to use factory
└── models/
    ├── payment_profile.rb             # Updated with processor fields
    └── payment_transaction.rb         # Updated with processor fields

db/
└── migrate/
    ├── ..._add_processor_columns_to_payment_profiles.rb
    └── ..._add_processor_columns_to_payment_transactions.rb

docs/
├── payment_processor_abstraction.md   # Full implementation plan
├── fiserv_credentials.md              # Fiserv sandbox credentials
└── phase1_implementation_complete.md  # This file

🎯 Next Steps: Phase 3 - Fiserv Integration

Once testing confirms the abstraction layer works, we can proceed with:

1. Create Fiserv Adapter

• app/services/payment_processors/fiserv_adapter.rb
• Implement all base interface methods
• Handle Fiserv's session-based flow

2. Add Fiserv Helper

• app/helpers/fiserv_helper.rb
• Session credential generation
• HMAC signature generation

3. Update Frontend

• Add Fiserv Hosted Fields SDK to payment.html.erb
• Conditional rendering based on processor
• Keep Accept.js for Authorize.Net customers

4. Configuration

• Add Fiserv credentials to .env
• Set DEFAULT_PAYMENT_PROCESSOR=fiserv

🚀 Benefits Achieved

1. Processor Agnostic - Can now support multiple payment processors
2. Easy to Switch - Change processor with just an env var
3. Future-Proof - Adding new processors is just creating a new adapter
4. Backwards Compatible - Existing Authorize.Net data still works
5. Per-Customer Selection - Can route different customers to different processors
6. Better Testing - Can mock processors easily

⚠️ Important Notes

Environment Variables

Currently using Authorize.Net by default. To switch to Fiserv later:

# In .env
DEFAULT_PAYMENT_PROCESSOR=fiserv  # or 'authorize_net'

Legacy Data

• Old payment profiles with authorize_customer_profile_id still work
• Migration backfilled processor field for all existing records
• Both old and new fields coexist for backwards compatibility

Rollback

If issues arise, you can:

1. Change DEFAULT_PAYMENT_PROCESSOR=authorize_net in .env
2. Restart server
3. All new payments route to Authorize.Net adapter

No code changes needed - just configuration!

📊 Testing Checklist

Before moving to Phase 3, verify:

• [ ] Migrations ran successfully
• [ ] Existing payment profiles have processor='authorize_net'
• [ ] New payment creates PaymentProfile with processor fields
• [ ] New payment creates PaymentTransaction with processor fields
• [ ] Payment authorization works
• [ ] Payment capture works
• [ ] Refunds work
• [ ] No errors in Rails logs
• [ ] Accept.js still tokenizes correctly

🤝 Ready for Fiserv?

Once testing is complete, we can start Phase 3:

• Implement Fiserv adapter
• Add Hosted Fields frontend
• Test in Fiserv sandbox
• Gradual migration plan

Estimated time for Phase 3: 3-4 days

Questions?

Check the following docs:

• docs/payment_processor_abstraction.md - Full implementation plan
• docs/fiserv_credentials.md - Sandbox credentials
• app/services/payment_processors/base.rb - Interface documentation