Case study
A documentation-first payments integration + troubleshooting case study—meant to help teams navigate the common mishaps of working with a payment orchestrator.
Problem
Teams integrating with orchestrators often lose time in ambiguous docs, inconsistent sandbox behavior, and unclear failure ownership.
What it is
A documentation-first case study and playbook for integration and troubleshooting workflows around DEUNA and downstream providers.
Constraints
- Must stay practical for operators under incident pressure.
- Needs to be useful without a full product UI around it.
- Has to connect request shapes with real-world failure diagnostics.
Architecture
Structured docs + request collections + SQL examples, organized as an operational troubleshooting reference instead of a deployed app.
- requests/: step-by-step flow examples
- sql/: incident and decline analysis queries
- troubleshooting guide: DEUNA → PSP → issuer/network
Key decisions
- Treat this as a case study/playbook, not a deployed checkout.
- Organize by end-to-end flow sequence, not endpoint catalog.
- Pair request examples with failure patterns and RCA queries.
What shipped
- Step-by-step request-shape guidance for core payment/refund flow.
- Common failure scenarios and where to investigate first.
- SQL templates for declines, incident windows, and V2 anomalies.
What next
- Expand webhook replay and idempotency troubleshooting.
- Add deeper reconciliation templates for settlement operations.
Notes
- This repo is a case study and playbook. It is not a deployed payment app.
- Purpose: help teams navigate common mishaps when integrating with a payment orchestrator.