Optimizing Payload Serialization for Low-Bandwidth Terminals

When building for handheld POS systems in regions with 2G/3G connectivity, every byte counts. We recommend using a condensed JSON structure and omitting null fields to reduce the MTU overhead.

{
  "tid": "7782",
  "amt": 5000,
  "cur": "NGN",
  "sig": "a5f8..."
}