Hability to pay also in DU
Currently G1 payment is the default unit. Maybe it would be good to add a link in the question "How many G1?" in order to pay with DUs (since DU payments are rare in transactions and prices)...
Not sure if telegram api supports it but maybe that message could be "How many G1? (or pay with DU" ? When clicking, bot would remember the public address before... will remove the "How many G1" message(similar to pushing cancel) and will add a "How many DUs? (text) / Cancel(button)" instead.