QR Payment Gateway
Production-ready QR payment gateway.
Dynamic QR codes, bank callbacks, idempotent webhooks, and merchant reconciliation.
Problem
Manual payment confirmation slows checkout and reconciliation.
Outcome
Instant verified payments with automated order updates.
Solution Architecture
Merchant QR gateway with dynamic codes, bank callbacks, idempotent webhooks, and POS order sync.
Idempotent
Webhook design
Realtime
Order updates
QR
Dynamic codes
Create QR
Amount-locked payload
Bank scan
Customer banking app
Callback
Signed bank webhook
retryVerify
Idempotency + HMAC
Update order
POS / ecommerce notify
What we shipped
No duplicate charges on replay
Merchant dashboard for settlements
VietQR-style flow compatible
Cross-cutting production layer
Key Features
Webhook callbacks
Real-time status to POS and ecommerce systems.
Retry & idempotency
Safe replays without duplicate charges.
Dynamic QR
Amount-locked codes per transaction.
Instant verification
Automated confirm on bank callback.
Merchant dashboard
Settlements and payment reports in one place.
Tech Stack
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