ReplaceSticker

import asyncio
from ferogram import Client, raw

app = Client("my_session", api_id=12345, api_hash="0123456789abcdef0123456789abcdef")

async def main():
    await app.start()
    result = await app.raw.stickers.ReplaceSticker(
        sticker=raw.types.InputDocumentEmpty(),
        new_sticker=raw.types.InputStickerSetItem(document=raw.types.InputDocumentEmpty(), emoji='')
    )
    print(result)

asyncio.run(main())