How to Manage Stickers and Custom Emoji with Telegram Bots
Use bot-managed sticker sets when sticker or custom emoji management is part of the bot itself: brand packs, community packs, generators, moderation tools, or a workflow around user-submitted images.
Bots (and only bots) can create sticker sets and custom emoji sets. Each pack must have a user specified as its owner. A common way for people to create and manage sticker sets is through @Stickers bot, but other bots can do it as well. Telegram also provides an official @Stickers Mini App, which lets users create stickers and emoji, manage packs, and view usage statistics in a richer interface.
Use the API when the bot should create, rename, edit, or delete sets.
Custom emoji
Only premium users may use custom emoji from sets. Nevertheless, custom emoji sets can be created by any bots and owned by any users.
Choose a set format
Choose the format before processing user files. Sticker sets and custom emoji sets may be static (PNG or WEBP), video (WEBM), or animated (in a special format based on Lottie). Furthermore, a set of single color emoji may be adaptive, meaning that users will see it in the same color as the text regardless of their color theme.