Prohibit repost from a specific group in a telegram?

Question

Telegram

There is a public chat, in which chatlans periodically repost posts from other groups, including from the competitor's group.
How to prohibit reposting to a group from a competitor's group?

Answer 1

For forwarded messages, the sender's data (forward_from) comes in the array. If it is a competitor, then delete the message using the deleteMessage method.