Installed stickersets have changed, the client should refetch them as described in the docs.
updateStickerSets#43ae3dec = Update;| Name | Type | Description |
|---|---|---|
| flags | # | Flags, see TL conditional fields |
| masks | flags.0?true | Whether mask stickersets have changed |
| emojis | flags.1?true | Whether the list of installed custom emoji stickersets has changed |
Telegram allows including animated and static custom emojis inside of messages.
Telegram clients support displaying static and animated stickers.