View Source ExTDLib.Object.UpdateStoryStealthMode (ExTDLib v0.0.4)

Story stealth mode settings have changed.

Name	Type	Description
active_until_date	number	Point in time (Unix timestamp) until stealth mode is active; 0 if it is disabled.
cooldown_until_date	number	Point in time (Unix timestamp) when stealth mode can be enabled again; 0 if there is no active cooldown.

More details on telegram's documentation.