domain-ecommerce:payment-integration

Integrating multiple payment gateways like Stripe and PayPal requires multi-PSP routing patterns that orchestrate transactions across different providers. This approach centralizes payment logic, enabling dynamic provider selection based on cost, geography, or success rates within your e-commerce checkout flow.

3DS2 compliance is a mandated authentication protocol for payment gateway integrations that reduces fraud by verifying cardholder identity during checkout. Implementing 3DS2 compliance ensures your e-commerce platform meets global regulatory standards while minimizing transaction friction and false declines.

Yes, you can add Buy Now Pay Later (BNPL) options like Klarna, Affirm, and Afterpay alongside traditional payment gateways. Integrating BNPL services requires specific API patterns to handle deferred payment authorizations, refunds, and settlement schedules within your existing checkout architecture.

This payment integration approach supports cryptocurrency processing by providing implementation patterns for BitPay and BTCPay Server. You can route crypto transactions alongside fiat gateways, handling blockchain confirmations, wallet address generation, and multi-currency settlement within your e-commerce platform.

Handling idempotency and refunds across multiple payment service providers requires generating unique idempotency keys for each transaction attempt to prevent duplicate charges. Subscription billing and refund logic must be centralized to manage recurring schedules and partial reversals consistently across all integrated gateways.

A limitation of multi-PSP routing for fraud prevention is the complexity of maintaining consistent risk scoring rules across disparate payment gateway APIs. Implementing unified fraud prevention requires careful orchestration to avoid data synchronization issues and ensure transaction context is shared effectively across all providers.