QR code web service Docker

📌 Core Functional Modules

1. Payment Notification API

• Endpoint: POST /api/payment/notify

• Function: Receives payment data (e.g., amount, transaction_ref, timestamp, source).

• Security:

• API Key verification via X-API-KEY header.

• Duplicate transaction prevention using transaction_ref.

• Data Storage: Records saved to SQLite database.

• Webhook: Triggers real-time push if enabled.

2. Webhook Push System

• Asynchronous push to an external WEBHOOK_URL when a payment is received.

• Features:

• HMAC-SHA256 signature generation using WEBHOOK_SECRET.

• Retry logic on failure (with max attempts defined in .env).

• Full push log history viewable at /webhook/logs.

• Manual retry supported from the UI.

3. QR Code Redraw API

• Endpoint: POST /api/parse-qr

• Function: Reconstructs and beautifies a DuitNow QR code from raw payload or image.

• Output: QR code image (JPG format), optionally with top-positioned logo.