| Service | Responsibility | Tech Stack (example) |
|--------|----------------|----------------------|
| UPI Intent Service | Create, store, and expire payment intents. | Go + Redis (TTL) |
| QR/Deep‑Link Generator | Encode intent payload in QR/URL. | Node.js + qrcode lib |
| UPI Orchestrator | Central routing, idempotency, retry logic. | Java‑Spring Boot, gRPC |
| PSP SDK Wrapper | Abstract NPCI/Bank APIs (collect, request‑to‑pay). | Python SDK (thin wrapper) |
| Callback Receiver | Async webhook endpoint (verified via HMAC). | Kotlin + Spring WebFlux |
| Ledger Service | Double‑entry accounting, per‑order ledger entries. | PostgreSQL + Debezium for CDC |
| Event Bus | Publish/subscribe for payment events (Paid, Failed, Refunded). | Apache Kafka (replication factor 3) |
| Notification Service | SMS/Email/Push to shopper & seller. | AWS SNS + Twilio |
| Risk Engine | Real‑time fraud scoring (velocity, device fingerprint). | Flink + Redis Bloom filter |
All services are stateless (except Ledger & Intent Store) and deployable in Kubernetes with auto‑scaling based on CPU/RTT metrics.
If you are attempting to pay via UPI on Faphouse and it fails, here is the likely hierarchy of issues: faphouse upi payment full
Look for an option labeled:
If you see a direct UPI field, you are in luck. If not, select Bank Transfer. The system will ask for your IFSC code and account number. | Service | Responsibility | Tech Stack (example)
Click "Request Payout" or "Withdraw." If you selected UPI, the system will deduct the amount from your Faphouse balance.
The Reality: Faphouse does not process payments directly. Like almost all adult platforms, they use third-party high-risk payment processors (Gateways). If you see a direct UPI field, you are in luck
A: No. This will lead to a permanent ban. The name on Faphouse must match the bank account holder. This is a strict anti-money laundering (AML) rule.