Payments Integration

Covers payment request initiation, status confirmation, and post-confirmation operational handoff.

• Merchant onboarding and settlement readiness are complete.
• Client system stores canonical payment IDs and idempotency keys.
• Webhook endpoint verification and replay handling are implemented.

• Intent creation returns payment intent identifier and initial state.
• Initiation returns checkout/authorization context for payer action.
• Confirmation is consumed via status checks and webhook event convergence.

1. Create intent with amount, currency, merchant order reference, and idempotency key.
2. Initiate payment action and present customer flow context.
3. Track state transitions through pending, confirmed, failed, expired, or canceled.
4. Release fulfillment only after confirmed terminal state is verified.

• Intent validation failure due to malformed amount or unsupported asset context.
• Initiation failure due to payer authorization or session expiry.
• Confirmation lag from delayed event delivery or unacknowledged webhook processing.

Use one idempotency key per logical merchant order action and avoid creating duplicate intents during uncertain network outcomes.

• Track conversion by payment lifecycle stage and failure reason.
• Monitor confirmation latency and webhook redelivery rates.
• Correlate payment ID across merchant order, event stream, and settlement records.