payment-integration

Idempotent charging prevents duplicate payments by using unique idempotency keys for each transaction request. This ensures that if a network timeout or retry occurs, the payment gateway processes the charge only once, avoiding double charges and maintaining payment reliability.

Card tokenization replaces sensitive payment credentials with secure tokens, helping achieve PCI DSS compliance through minimal data retention. By avoiding raw card storage and enforcing TLS-only transport, systems prevent PCI violations while maintaining safe logging practices.

Webhook signature verification validates payment gateway notifications cryptographically to prevent tampering. Combined with idempotent asynchronous webhook handling, it ensures reliable processing of subscription billing events and transaction updates without duplicate execution.

Yes, the payment integration supports subscription billing lifecycle management through a structured approach. It includes dunning for failed payment retries, proration for mid-cycle changes, and fraud controls like 3D Secure and AVS to secure recurring transactions.

Handling authorization, capture, void, and refund flows requires correct sequencing of payment gateway API calls. Using idempotency keys during these transaction states ensures reliability, preventing duplicate charges or errors during network failures.

Yes, you can build a PCI-compliant integration with Stripe or Adyen using this approach. It provides guidance for tokenization, minimal retention, and fraud controls required to satisfy PCI DSS requirements for secure payment processing.