when the data is sent from the gateway to lora-server, it contains the field spreadingFactor. However, after processing / decoding the data, the spreadingFactor is not forwarded (whereas, e.g. RSSI is).
Is it possible to also provide the spreadingFactor after the decoding of the messages?
Please see the txInfo -> dr field, it maps to the used spreading-factor / bandwidth (you will find this mapping in the Regional Parameters specification document).