Telegram Domain Verification Bot

This bot restricts access to Telegram users by verifying their email address. Users must enter an email with the specified domain and verify their identity using a One-Time Password (OTP) sent via email.

Features

• Accepts only users with emails from a predefined domain (e.g., university.edu).
• Sends an OTP to the provided email for verification.
• Maintains a persistent list of verified users in a JSON file.
• Allows cancellation of the verification process at any stage.

Prerequisites

• Python 3.7 or later.
• A Telegram bot token (generated using BotFather).
• An email account configured to send OTP emails.

Installation

1. Clone this repository:

   git clone https://github.com/ngljcb/px-bot-telegram-domain-verification.git
   cd px-bot-telegram-domain-verification

2. Install dependencies:

   pip install python-telegram-bot

3. Update the script:

   • Replace "YOUR_BOT_TOKEN" in the main() function with your Telegram bot token.
   • Replace "your-email@example.com" and "your-email-password" in the send_email() function with your Gmail credentials.
   • Set your university email domain by updating the UNIVERSITY_DOMAIN variable.

4. Run the bot:

   python bot.py

Usage

1. Start the bot by sending the /start command.
2. Provide your university email when prompted.
3. Enter the OTP sent to your email address.
4. Once verified, you gain access to the bot's features.

File Structure

• bot.py: The main script containing bot logic and email sending functionality.
• verified_users.json: A JSON file to store verified users' information persistently.

Security

• Use environment variables or a secret management tool to store sensitive credentials (e.g., bot token, email password).
• If using Gmail, consider enabling 2-Step Verification and generating an app-specific password for added security.

Troubleshooting

• Email not received: Ensure the sender's Gmail account is properly configured, and verify the recipient email's spam folder.
• Invalid OTP: Ensure the correct OTP is entered before it expires.