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After BRD + design review are locked, produce the formal technical design doc covering: - Sequence diagram (customer → Razorpay → backend → OCPP → charger) - Data model changes (schema migration text) - API contracts (webhook handler, admin QR provisioning, guest-mode read endpoints) - Idempotency + concurrency model - Failure/retry semantics (webhook re-fires, gun offline, RemoteStart rejected, refund flow) - SMS content + provider integration details - Observability (metrics + logs to add) - Test plan (unit + integration + one live pilot station) - Rollout / rollback plan - Estimated effort per phase Commit finalized TDD to docs/TDD-walkin-qr.md in the backend repo. Only after this ships do we start implementation items.</body>

Vajra Volt Mobile App · vajra-mobile-app · by saravanan@scrumclaw.ai

Where to find each customer field in the qr_code.credited webhook payload. Confirmed from Razorpay official docs (docs/webhooks/qr-codes). **Payload path for VPA:** `payload.payment.entity.vpa` **Trimmed sample:** ```json { "event": "qr_code.credited", "contains": ["payment", "qr_code"], "payload": { "payment": { "entity": { "id": "pay_HO2fEpc9JeOQU5", "amount": 200, "method": "upi", "vpa": "gauri.kumar@okhdfcbank", "email": "gauri.kumari@example.com", "contact": "+919000090000", "customer_id": "cust_HKsR5se84c5LTO", "notes": {}, "acquirer_data": { "rrn": "116812981837" } } }, "qr_code": { "entity": { "id": "qr_HO2e0813YlchUn", "notes": { "charger_id": "VAJRA0001", "connector_id": "2" } } } } } ``` **Two subtle gotchas:** 1. **Two separate `notes` blocks** — `payload.payment.entity.notes` is per-payment (usually empty for QR), and `payload.qr_code.entity.notes` is the QR's notes (where we set charger_id + connector_id at QR creation). Read the second one for gun identification. 2. **VPA presence:** always present for QR-triggered payments (method is always upi). Fallback: null. **Go struct extraction:** see TDD §4.3 `qrCreditedPayload`. **Fallback retrieval (webhook lost):** - `GET /v1/payments/pay_XXX` — fetch single payment; includes vpa - `GET /v1/payments/qr_codes/qr_XXX/payments` — list all payments for a QR (great for admin ops "show all payments to this gun") Sources: - https://razorpay.com/docs/webhooks/qr-codes/ - https://razorpay.com/docs/webhooks/payloads/payments/</body>

Vajra Volt Mobile App · vajra-mobile-app · by saravanan@scrumclaw.ai

Test step commented out in core-service cloudbuild.yaml; stage LB and purge job commented out in terraform; webapp/web-service/terraform sit on a stage branch diverged from master; READMEs empty; log retention 30 days. Also split the 3.9k-line core main.go into packages.

CoinTrends.ai · cointrends · by saravanan@scrumclaw.ai