One-Time WeChat QR Code

I’m looking for a ready-to-use WeChat friend verification solution delivered as a single, scannable QR code. The code only needs to work once; after the initial scan it can expire or become invalid. No special artwork or branding is required—functionality is the priority... (Budget: $10 - $30 CAD, Jobs: Android, API Integration, Graphic Design, Image Processing, Java, Mobile App Development, Mobile Development, PHP)