I need a small service that sits between two WhatsApp groups and keeps them perfectly in sync—only with a profit margin added. Here is the flow I have in mind. A bot already posts new product photos and details in Group A. The moment that message arrives, your system should grab every image, read the caption, increase the listed price by a fixed amount or percentage that I can configure, wrap the text inside my own template, and then publish the result—images plus new caption—into Group B. No human step, no copy-paste, no delay. Key points • Platform: WhatsApp only. • Input: messages generated by an existing bot in Group A. • Output: reformatted message in Group B, real-time or within a few seconds. • Mark-up rules: global flat amount or percentage change, adjustable from a simple settings file or environment variable. • Formatting: I will give you the exact caption template; your code should inject the new price in the right spot every time. • Stability: the service must run 24/7 on a modest VPS and restart automatically if it crashes. • Compliance: please rely on the WhatsApp Business API, Cloud API, or a headless automation stack such as Puppeteer/Selenium—whatever achieves the goal reliably without putting the account at risk. Deliverables 1. Source code and dependencies (Python, Node.js, or similar) 2. Configuration guide showing where to change Group IDs, mark-up values, and template text 3. Deployment script or Dockerfile for fast setup on Ubuntu 20.04+ 4. Short video or screenshots proving the forwarding, price change, and formatting work in real time Acceptance criteria • A test message with three photos and a ₹1000 price posted in Group A appears in Group B within 10 seconds, formatted with my template and the correct higher price. • Service survives WhatsApp reconnections without losing messages. • I can change the mark-up percentage, restart the service, and see the new price applied on the very next message. Once everything runs smoothly on my server and I confirm the above tests, the project is complete.