I will diagnose one failing payment webhook scenario and turn it into a deterministic, reproducible test.
This entry package covers one endpoint and one event type. I will inspect sanitized code, payloads, headers, and logs to determine whether the failure comes from raw-body parsing, signature construction or comparison, missing or case-sensitive headers, timestamp tolerance, incorrect status codes, provider retries, duplicate delivery, missing idempotency, or event-status mapping.
You receive:
• One automated reproduction test or minimal runnable reproduction
• A concise root-cause report
• A prioritized fix checklist
• Sanitized fixtures used for the reproduction
• One revision within the agreed scenario
This package diagnoses the failure. Production code fixes, deployment, database migration, multiple endpoints, and live-provider configuration are separate.
I do not need production credentials, private keys, seed phrases, live funds, or customer data.
