How to receive webhooks from a public channel? #655

I successfully created a bot, that receives webhooks, if I chat with the bot directly.

I also want to receive webhooks and handle webhooks from other channels. For example a public channel.

• I added the boot as an Admin to the channel.
• Set allow message from unknown chats to true and added the chat id to the database.
• I set the privacy to disabled.

Did I miss something?