Brazil Smile.one API Integration

I run a mobile-focused gaming top-up store that targets Brazilian players, and I want to add Smile.one’s Reseller API so customers can buy diamonds, coins, or passes without ever leaving my app.

Your job is to handle the full integration: secure the reseller API key for the Brazil region, hook the mobile endpoints into my existing checkout flow, and make sure every call—from product catalogue to payment confirmation—returns the correct data in real time. Once the connection is live I need basic error handling, a few sandbox test cases, and a short implementation guide so my in-house devs can maintain it.

Key facts you should know
• Primary purpose: Gaming services top-ups
• Platform in scope: Mobile (Android & iOS)

Deliverables
1. Active Smile.one reseller API key configured for Brazilian market
2. Clean, well-commented integration code (PHP or Node preferred, but I’m flexible)
3. Postman collection or curl scripts that demonstrate purchase, balance check, and refund endpoints
4. Brief markdown guide covering endpoint usage, required headers, and response formats
5. Successful live test of at least one real transaction to a Brazilian mobile game account

Acceptance criteria
• API calls complete in