A big (640x640) chat photo variant in JPEG format. The file can be downloaded only before the photo is changed.
Optional
has_True, if the photo has animated variant.
Optional
is_True, if the photo is visible only for the current user.
Chat photo minithumbnail; may be null.
A small (160x160) chat photo variant in JPEG format. The file can be downloaded only before the photo is changed.
Contains basic information about the photo of a chat.