Application version
Device model
Either an ISO 639-1 language code or a language pack name obtained from a language pack link .
Platform identifier (i.e. android , tdesktop , etc).
OptionalparamsAdditional initConnection parameters. For now, only the tz_offset field is supported, for specifying the timezone offset in seconds.
OptionalproxyInfo about an MTProto proxy
The query itself
Code for the language used on the device's OS, ISO 639-1 standard
Operation system version
Application identifier (see. App configuration )