Download Task Completed Notification

Parameter Name			Parameter Type	Description
callBackEnum			string	Callback notification event type. This notification is fixed as: ENVELOPE_UPDATE
callBackDesc			string	Callback notification event action. This notification is fixed as: ENVELOPE_DOWNLOAD_TASK_RESULT. Sent after file assembly is completed.
timestamp			long	Callback time, in Unix timestamp format, unit: milliseconds
CallBack EnvelopeVO			object	Callback notification payload
	taskId		string	Download task ID.
	status		int	Download task status: 1 - Completed.
	envelopeId		string	Envelope ID.
	envelopeStatus		int	Envelope Status 0- Created (Draft) 1- Signing in Progress 2- Completed 3- Expired 5-Revoked
	downloadUrl		string	File download URL [Note] Valid for 30 minutes. After expiration, please call the API again to obtain the download URL. Returned when the original download request has downloadType=zip.
	envelopeFiles		array	Envelope file collection [Note] Returned when the original download request has downloadType=list.
		fileType	string	File type CONTRACT-Signed document ATTACHMENT-Attachment CERTIFICATE-Certificate COMBINED-PDF file that merges the 'signed document' and 'certificate of completion'. Returned when 'merge envelope files for download' is enabled.
		fileName	string	File name
		downloadUrl	string	File download URL (valid for 60 minutes)

Callback example

{
    "callBackEnum": "ENVELOPE_UPDATE",
    "callBackDesc": "ENVELOPE_DOWNLOAD_TASK_RESULT",
    "timestamp": 1789626553000,
    "callBackEnvelopeVO": {
        "taskId": "486a3f623b2c4e12993864482f371486",
        "status": 1,
        "envelopeId": "86e37b9f57564c31afe04a397170f773",
        "envelopeStatus": 1,
        "downloadUrl": "https://example.com/download/file.zip"
    }
}