View Source ExTDLib.Method.SetStickerEmojis (ExTDLib v0.0.4)

Changes the list of emoji corresponding to a sticker; for bots only. The sticker must belong to a regular or custom emoji sticker set created by the bot. Returns object_ptr<Ok>.

NameTypeDescription
stickerInputFileSticker.
emojisstringNew string with 1-20 emoji corresponding to the sticker.

More details on telegram's documentation.