(chat bots) Pay subscription to chat in Telegram

Interesting task was in the client, there is a chat photographs of Ukraine in which the author constantly places useful information.
It was a question of monetization chat, developed a chat bot that depending on the success of the listing of funds from the card provides access to the chat telegram. If in the last month the signature failed to sign - the chat bot removes the lulline from the chat automatically!

All processes have been automated and work properly!