Building Payment Gateway Integrations in Go: A Complete Guide
Go Architecture Patterns Series: ← Previous: Saga Pattern | Series Overview Introduction Building a robust payment gateway integration is one of the most critical components of any e-commerce or financial application. Payment systems must handle multiple providers, ensure transactional integrity, implement retry mechanisms, support scheduled payments, and maintain comprehensive audit trails. In this guide, we’ll explore how to build a production-ready payment gateway integration system in Go that handles: Multiple Payment Providers: Stripe, PayPal, Square, and custom gateways Transaction Management: Atomic operations with proper rollback Retry Logic: Exponential backoff and idempotency Scheduled Payments: Recurring billing and delayed charges Data Persistence: Both SQL and NoSQL approaches Security: PCI compliance and sensitive data handling Architecture Overview Our payment system follows the Strategy pattern to support multiple payment gateways while maintaining a consistent interface. ...