package Ġdev . in mo . tg bot api . types . message . abstract s Ċ Ċ import Ġdev . in mo . tg bot api . types . Author Signature Ċ Ċ interface ĠSigned Message Ġ: ĠMessage Ġ{ ĊĠĠĠ Ġval Ġauthor Signature : ĠAuthor Signature ? Ċ }