This bot can help people to use awesome telegram stickers in their slack chats. There is also a telegram bot (@slack_stickers_bot), where you need to send stickers that you want to use.
Setting up Slack Sticker Bot in Slack is simple. Just click the button to log in to your Slack account and choose a team!
Also you need to add @slack_stickers_bot to your telegram. Then type /start and follow commands/
Once you install both bots, try to send some stickers to telegram bot and then type /ss in slack to use this sticker.