Telegram bot for manage private channel subscriptions

Goal of the Bot
The bot need to handle users subscriptions to access to a private telegram channel. Only paying users can see the content on the paid channel.

Payment methods
- PayPal
- Stripe

Features
- Auto kick users from the Telegram channel when the subscription has expired.
- Paying users must reiceve an invitation link to access the private channel.
- Bot need to handle different subscription plans, each of them with a different duration.
- Bot need to send a notification to paid user and notify renewal, the notification must be sent 1 week before renewal.
- Trial period (optional).

Technical structure
- Bot need to be developed in NodeJS.
- TelegrafJS is appreciated.
- MongoDB for users storage is appreciated.

Budget
The budget available for this project is limited, we can discuss about the price based on the features.
Development time
You can stay relaxed on this. I don’t need the bot within a week, I can also wait a month for this.