[Dragonpay] A payment notification (postback)

Extensions Dragonpay
,
1

It is described in the part 5.2.1.2 «Response Parameters» (pages 10-11) of the PDF documentation.
Actually, the response parameters are passed through URL, but I converted them to a JSON document for my convenience:

{
    "digest": "31fc934d153a57b183b4acf1abd66289d993d44b",
    "message": "[000] Waiting for deposit to BDO #ML7AM4C9",
    "param1": "",
    "param2": "",
    "procid": "BDO",
    "refno": "ML7AM4C9",
    "status": "P",
    "txnid": "ORD-2017/08-01035"
}