Specifies the payment or service provider. Currently, only "flutterwave" is supported

A unique identifier assigned to the merchant by the payment or service provider.

A unique identifier to track this operation. It must be between 12 and 255 characters in length.

An optional scenario key that can be used to simulate specific behaviors or test different scenarios within the API. Providing this header allows you to trigger predefined responses or alter data based on the key's value, which can be useful for testing, development, or demonstrating specific functionalities. The key should be a string of 1 to 1000 characters.