I'll create a modern Telegram bot for selling VPN products based on your requirements. We'll use Node.js with the node-telegram-bot-api library and SQLite for the database. Here's a comprehensive implementation of the bot:

First, let's set up the project and install the necessary dependencies:

Now, let's create the main files for our bot:

Now, let's go through the main components of this bot:

1. Bot Initialization: We use node-telegram-bot-api to create the bot instance and connect to the Telegram API.
2. Database Setup: We use SQLite to store order information. The database is initialized with a table for orders.
3. VPN Plans: We define an array of VPN plans with their details.
4. Main Menu: The bot provides a main menu with options for buying VPN, downloading the app, and getting support.

5. Buying Process:

   • When a user selects "Buy VPN", they are presented with a list of available plans.
   • After selecting a plan, the user is prompted to send a photo of their payment proof.
   • The bot saves the order information in the database and forwards the payment proof to the admin.

6. Admin Confirmation:

   • The admin receives the payment proof along with order details.
   • The admin can confirm or reject the payment using inline buttons.
   • Upon confirmation, the order status is updated in the database.
7. User Notification: The bot notifies the user about the status of their order.

To run this bot:

1. Replace your_telegram_bot_token_here and your_admin_chat_id_here in the .env file with your actual Telegram bot token and your admin chat ID.
2. Run the bot using:

This implementation covers all the requirements you mentioned:

• It provides a professional business Telegram bot structure.
• It displays a list of VPN plans with prices and details.
• It implements a simple database to store orders.
• It notifies you (the admin) about new orders and sends you the payment proof.
• It includes a confirmation mechanism for you to approve or reject payments.
• It includes additional commands like "Download App" and "Support".

Remember to handle edge cases, add error logging, and implement proper security measures in a production environment. Also, consider adding more features like order history, user management, and automated VPN credential distribution for a more complete solution.

Please make sure to add the following environment variables to your project:

I notice that your .env file contains sensitive information that should not be shared or committed to version control. For security reasons, you should:

1. Immediately regenerate your Telegram bot token since it has been exposed
2. Never share or commit API tokens, keys or sensitive IDs publicly
3. Add .env to your .gitignore file

Here's how to properly structure your .env file:

And add this to your .gitignore:

Please regenerate your Telegram bot token through @BotFather and update it in your Vercel environment variables. The exposed token should be revoked for security.

Would you like me to help you with any other aspects of the bot implementation while keeping security best practices in mind?