Summary

Migrate billing products and features APIs from gRPC to Connect RPC format as part of the billing system modernization.

Progress: 8/8 APIs Complete (100%) ✅

✅ Completed APIs:

• ListProducts - Lists all available products
• GetProduct - Retrieves product details by ID
• CreateProduct - Creates new products with pricing and features
• UpdateProduct - Updates existing product configurations
• ListFeatures - Lists all available product features
• GetFeature - Retrieves feature details by ID
• CreateFeature - Creates new product features with metadata support
• UpdateFeature - Updates existing feature configurations

Migration Complete! 🎉

All billing products and features APIs have been successfully migrated from gRPC to Connect RPC format. The migration maintains 100% backward compatibility while modernizing the API interface.

Key Changes Made:

• Migrated handler signatures to use Connect RPC request/response wrappers
• Updated error handling to use Connect error codes and constants
• Preserved all business logic and validation rules
• Added comprehensive test coverage for all migrated endpoints
• Maintained backward compatibility with existing proto definitions

Technical Implementation:

• Request Access: Changed from request.GetField() to request.Msg.GetField()
• Response Wrapping: Using connect.NewResponse(&ResponseType{...})
• Error Handling: Convert to connect.NewError(code, error) format
• Logger Integration: Maintained existing logging patterns where present
• Mock Testing: Updated test framework to use Connect RPC patterns

Test Coverage:

Each migrated API includes comprehensive test coverage with:

• Success scenarios with minimal and complex data
• Error handling for service failures and validation errors
• Edge cases including empty requests and missing data
• Metadata handling for structured data

All APIs maintain identical business logic while adopting Connect RPC interface patterns. The migration provides a solid foundation for modern API development with improved type safety and better tooling support.