Zero-Trust Financial Security & Immutable Ledger
Every single rupee transacted across Growzy Payment Gateways is mathematically enforced by atomic row locks, double-entry ledgers, and cryptographic request verification.
Double-Entry Ledger Accounting
Balances are strictly derived from immutable credit/debit records. Transactions are never updated or deleted in-place; financial adjustments use auditable reversal entries with before/after state snapshots.
Row-Level Atomic Concurrency
Every balance mutation executes inside an isolated database transaction using pessimistic SELECT ... FOR UPDATE locks to eliminate race conditions and double-spending across parallel API requests.
HMAC-SHA256 & Replay Protection
API calls require cryptographic signature verification with microsecond-timestamp skew checking (300s window) and atomic nonce validation to reject recorded replay attacks.
SSRF-Proof Webhook Dispatcher
Outbound merchant webhooks validate DNS resolutions and ban all internal IPv4/IPv6 private ranges (RFC 1918, RFC 3927, loopback 127.0.0.1, 0.0.0.0) to prevent Server-Side Request Forgery.
AES-256-CBC Secret Encryption
All merchant API secrets, webhook signing keys, and sensitive credentials are encrypted at rest using industry-standard AES-256-CBC authenticated with unique initialization vectors.
Real-Time Automated Reconciliation
Automated continuous reconciliation cron jobs calculate the mathematical sum of all historical ledger entries against wallet cached balances, alerting instantly if any variance is detected.
Dynamic UPI QR Payment Architecture
Growzy generates dynamic UPI QR payment strings formatted using the standard Unified Payments Interface payload schema (upi://pay?pa=...&pn=...&am=...&tr=...&cu=INR). Every session is tied to a cryptographically unique 5-minute reference to prevent payment collision or duplicate bank UTR claims.
Build on Secure Fintech Infrastructure
Integrate Growzy into your Telegram bot, website, or enterprise system with complete confidence.