OptionalparentOptionalrefundIf set and require_payment is not set, refunds the amounts the user has already paid us to send us messages (directly or via a monoforum).
OptionalrequireIf set, requires the user to pay in order to send us messages. Can only be set by monoforums, not users, i.e. parent_peer must be set if this flag is set; users must instead use the inputPrivacyKeyNoPaidMessages privacy setting to remove a previously added exemption. If not set, allows the user to send us messages without paying (can be unset by both monoforums and users).
The user to exempt or unexempt.
If set, applies the setting within the monoforum aka direct messages » (pass the ID of the monoforum, not the ID of the associated channel).