Message Seen

Description

Viber offers message status updates for each message sent, allowing your bot to be
notified when a message has been seen by the user. The seen event will be sent only once
when the user reads their unread messages, regardless of the number of messages sent
to them or the number of devices they are using.

Event Payload

The event payload is a JSON object with the following properties:

Example

{
  "event": "seen",
  "timestamp": 1457764197627,
  "message_token": 4912661846655238145,
  "user_id": "jc9HsWTZ2Yf2NkRZ8KcNug=="
}

Property	Description	Notes
event	The event name.	Always seen
timestamp	The time the event was triggered.	Unix timestamp in milliseconds
message_token	Unique ID of the message.
user_id	The unique ID of the subscriber