Bot API 6.2

Custom Emoji
• Bots can identify custom emoji sent by Telegram Premium users via the new type "custom_emoji" and field custom_emoji_id added to the MessageEntity class.
• Added the method getCustomEmojiStickers to obtain information about specific emoji.
• Added the fields type and custom_emoji_id to the Sticker class.
• Added sticker_type as a new field for StickerSet and as a new parameter for createNewStickerSet.

Web Apps
• Implemented support for native dialog windows including alerts, popups with custom buttons and confirmation messages.
• A confirmation dialog can now be shown when users close the web app. The dialog can be toggled via the enableClosingConfirmation and disableClosingConfirmation functions.
• Added the field is_premium to the WebAppUser class — the standard User class already included this field, see version 6.1.

• Added has_restricted_voice_and_video_messages to the Chat class to support the new premium setting.

• And more, see the full changelog for details:

https://core.telegram.org/bots/api-changelog#august-12-2022

Note: The documentation for createNewStickerSet and StickerSet no longer mentions the contains_masks parameter and field respectively. In both instances, contains_masks will continue to work for backward compatibility but developers should use sticker_type instead.