How to Prevent Duplicate Payment Confirmation Issues
·7 min read
Backend
- Unique constraint on gateway payment IDs
- State machine: pending → paid → fulfilled
- Queue workers with exactly-once semantics where possible
Frontend
Disable double-submit on pay buttons; show clear pending states. VyaparGateway helps you issue dynamic UPI QR codes, verify payments, and notify your stack via webhooks—without charging a per-transaction platform fee on top of your plan.
Start with VyaparGateway
Create an account to connect your merchant profile, get API keys, and ship dynamic UPI checkout.