Message test. In a predefined order, separated by telda (~) : pan~ amount~ OTP~ merchant name~ currency

Language indicator

Message reference number

Masked PAN

The W3C Trace Context traceparent header for distributed tracing.
It helps propagate trace information across services.
For more details, refer to the official Trace Context documentation.

A unique identifier to ensure the request is processed only once, preventing duplicate operations (e.g. retries).

A unique ID for each API request. When the same ID is reused, the API returns the original response and skips duplicate processing. Useful for retrying failed or timed-out requests.