# Classes

This object represent a user's profile pictures.

This object represents a file ready to be downloaded. The file can be downloaded via the link https://api.telegram.org/file/bot/. It is guaranteed that the link will be valid for at least 1 hour. When the link expires, a new one can be requested by calling getFile.

Describes a Web App.

This object represents a custom keyboard with reply options (see Introduction to bots for details and examples).

This object represents one button of the reply keyboard. For simple text buttons, String can be used instead of this object to specify the button text. The optional fields web_app, request_user, request_chat, request_contact, request_location, and request_poll are mutually exclusive.

This object defines the criteria used to request a suitable user. The identifier of the selected user will be shared with the bot when the corresponding button is pressed.

This object defines the criteria used to request a suitable chat. The identifier of the selected chat will be shared with the bot when the corresponding button is pressed.

This object represents type of a poll, which is allowed to be created and sent when the corresponding button is pressed.

Upon receiving a message with this object, Telegram clients will remove the current custom keyboard and display the default letter-keyboard. By default, custom keyboards are displayed until a new keyboard is sent by a bot. An exception is made for one-time keyboards that are hidden immediately after the user presses a button (see ReplyKeyboardMarkup).

This object represents an inline keyboard that appears right next to the message it belongs to.