This is just a modified version of the code from the Chrome extensions "Save Telegram Chat History".
Purely for research, non-commerical use only. All credit goes to https://github.com/pigpagnet/save-telegram-chat-history, since this is their extension
If you have any feedback, feel free to visit them at https://github.com/pigpagnet/save-telegram-chat-history. The code is open-source.