Extension field
The environment variable pointing to different types of configurations for state sync and third-party callbacks.
To resend a message, the generated idClient must used to identify this message.
The target tag of this message. Members with the tag will receive the message; if it is unspecified, use the notifyTargetTags set by the sender when logging in, if it is still missing, the message will be sent to everyone in the chat room
For the matching rules of notifyTargetTags, see the document: Tags
Whether the message is resent
Custom message subtype, an integer greater than 0.
an alert
String array, the content is the account ID of the recipient. If this field is set and not empty, the message is a chat room directional message (the chat room directional message will not be saved in message history)
Field for GuardEase Moderator, up to 1024 bytes in JSON string. Example: "{"email":"test@163.com","phone":"12345678901","token":"1234","extension":"hello"}"
Extension field for GuardEase Moderator. JSON string, the maximum length is 1024.
indicates whether the text is moderated on the client