You can use @donate Telegram bot to create paid Telegram channels available by subscription. And @donate will manage the accounts in that channel, but not in linked with channel chat. This small Python script can ban users in chat, who are not in channel now.
To install create new virtual environment and install requirements (httpx and telethon).
python3 -m venv env
source ./env/bin/activate
pip install -r requirements.txtThan create telegram bot with @BotFather. Documentation from Telegram. Remember Bot token.
Then create Telegram app, «API development tools» section. Remember api_id and api_hash.
Then find out your channel id, remember it. You can see it in URL on Telegram web version, for example, our channel has url https://web.telegram.org/z/#-1251775798, so -1251775798 is our id, but we need add 100 to the start, so we have id: -1001251775798.
Add bot as admin to your channel and his linked chat.
Run script with activated virtual environment:
source ./env/bin/activate
TG_API_ID=... \
TG_API_HASH=... \
TG_BOT_TOKEN=... \
TG_CHANNEL_ID=... \
python fix-donate-tg-chat.pyTG_API_ID and TG_API_HASH — from my.telegram.org. TG_BOT_TOKEN from @BotFather. TG_CHANNEL_ID is your channel id, -1001251775798 for our Telegram channel.
You can add this script to cron scheduler for everyday run. For production usage with real ban+unban users uncomment lines in script in main function.