Payment report callback signature related naming of headers

[snekbaev]

Hi,

using test credentials and developing callback handling via ngrok.

/payments/report (maybe some others are affected as well) - noticed that I get headers which are not lowercased: Checkout-Account, Checkout-Method, Signature etc. Is this by design? Documentation seems to suggest lowercased convention, which is basically what I'm receiving when doing test payments and parsing the query string, but in this case I have to lowercase the header names prior to signature calculation.

Thank you!