Simple bot to download Sticker Set.
Clone repo, add "Token" file, place your bot token to this file. To get token – create your bot using FatherBot. See details here: https://core.telegram.org/bots#6-botfather
When you create your bot – start a conversation with him. Run project in Xcode (you can debug while running bot).
In Telegram: just write the sticker set name. Wait for a while and bot responds you with a zip file with sickers. To get emoji-prefixed files in zip archive – add " -emoji" after sticker set name. Like "animals -emoji".