Constructor schema is available as of layer 138. Switch »
|flags||#||Flags, see TL conditional fields|
|min||flags.0?true||Similar to min objects, used for message reaction constructors that are the same for all users so they don't have the reactions sent by the current user (you can use messages.getMessagesReactions to get the full reaction info).|
In some situations user and channel constructors have reduced set of fields present (although id is always there) and min flag set.
Get message reactions