Payment Gateway Integration: More Than a Checkout Button
Plan payment states, webhooks, refunds, reconciliation and customer communication.
Plan payment states, webhooks, refunds, reconciliation and customer communication.
The server confirms payment
Browser redirects can be interrupted. Verify signed provider events and make processing idempotent so repeated notifications do not duplicate orders.
Represent every state
Pending, authorized, captured, failed, refunded and disputed payments have different operational meaning. Keep customer and finance views consistent.
Reconcile settlements
Gateway balances, fees and payouts must connect to internal orders. Design references and reports that help finance explain differences.
A practical next step
Turn the ideas in this guide into a short list of decisions, owners and evidence. Start with the customer or operational outcome, document the constraints and choose the smallest release that can prove useful value without compromising trust.