https://t.me/testdonationsbot
(source: https://github.com/cybeo/StreamDonation/commit/8affe1b93db3c80a5a47907ca0a72f10493d5d36)

This mini app was created for streamers who want to accept donations on streams on Telegram/Twitch/YouTube platforms and everything that supports OBS.
This mini app has a bot for setting up your own bot for accepting donations (@accept_donations_bot) and also has a test bot that already accepts payment from the user (@testdonationsbot) and shows the donation on the stream (working examples and details on github).