By granting Grindery access to your Telegram account you send tokens to your Telegram contacts from the Telegram Mini App.
Unfortunately this Telegram has really limited management of authentication scopes. At this moment the only way to access Telegram contacts is via the TDLib. We know Telegram is working on additional features that will limit address including the ability to use Bots from the attachment menu. We will adjust our integration as soon as they become available.
In the meantime rest assured that your data is safe and only used to allow you to send and receive tokens via Telegram.
Alternatively you can use the
/send command directly in the bot and share a Telegram contact from there.