FAQ

Quick answers for common integration questions. Use the links below for detailed references.

Where do I find status and error codes?

See Error codes for operation codes, payment transaction codes, subscription contract values, and typical remediation steps.

How do merchant notifications work?

See Notifications for callbacks, IP allowlisting, digest rules, and payload shapes.

Integration models and flows

• DCB overview — subscription and one-time payment flows.
• Subscription SDK — recurring billing integration.
• One time payment SDK — single-charge flows.

Still stuck?

Open Need help? for support paths and escalation.