Case study: automating subscriptions to a private Telegram channel and recurring payments via CloudPayments

Situation and purpose

It was necessary to set up paid access to a closed channel: the user pays for the subscription with a bank card, receives an invitation to the channel and remains a member upon successful renewals. All the logic is in the Telegram bot: registration, changing payment details, canceling subscriptions, recurring charges and automatic access control.

Subscription Business Logic

1. Decoration
   
   
   
   charge + tokenization

   • subscription_idaccount_idtoken

   • a one-time invite link

2. Access to a private channel
   
   validationgetChatMember

3. Recurrent write-offs
   
   reminder
   
   recurring by token

4. Updating banking details (changing the card)
   
   One more monthNext

5. Cancel subscription
   
   until the end of the paid period

6. An undelivered extension
   
   the strategy of retraysreviewed

Channel access control

• Extradition

• Membership VerificationgetChatMember

• Auto-deletion