d577db63_API_Integration_Guide___Zaypay__explanation
[status] in_progress [explanation] 
This means the payment process is going on right now. If for instance your customer needs to be on the phone for 50 seconds in order to complete the payment, during those 50 seconds the payment is in_progress. This state also occurs in text message based payments. There it means the customer has sent the message, we've sent (a) premium message(s) back to the customer and we're awaiting Delivery Reports to be sure the customer will be billed. For text-messages that phase should be short, but can be long under certain circumstances. Some of our suppliers retry internally if a first attempt fails. During this phase the payment is in_progress.
API Integration Guide | Zaypay
explanation