todo

Additional features
- shift the code from `botogram` to `pyTelegramBotAPI` lib
- whenever tipped, send a message to the receiver, send_message(rcv_chat_id, "You have received 4 EOS")
- token precision detection: if precision of token amount is not maintained => refer to the /tokenguide command.
- custom key generation for contract security: instead of using active, owner permission for pushing txn from inside the bot, it is recommended to add a custom key (say 'botperm') for using it in the bot codebase (uploaded into app server, github). This key can be changed at any time using owner permission.