payments-billing-integration

Webhook reconciliation syncs your local database state with provider events by handling out-of-order delivery and retries. It provides a reliable mechanism to process Stripe or Adyen events sequentially, ensuring your subscription billing system matches the actual payment provider state without synchronization errors.

Handling subscription proration and dunning requires automating the subscription lifecycle to manage trials, upgrades, and failed payment retries. By standardizing these complex billing scenarios into an idempotent framework, the system safely prorates invoices and triggers dunning workflows without state corruption.

Yes, this payment integration approach works with Adyen and similar platforms by standardizing the provider integration logic. It requires strict adherence to PCI-offloaded checkout patterns, ensuring sensitive card data never touches your backend while still accurately recording immutable ledger entries for all monetary events.

To implement a secure PCI-offloaded checkout flow, you offload the payment form to your provider and use idempotency keys for all backend money-mutating operations. This prevents double-charges and state synchronization errors while ensuring every monetary event is recorded in an immutable ledger.