I am stuck with one question in my research. I found some mentions that bitcoin(or blockchain) is a messeging system, I played with couple curve encoding algorithms and it was like:
Curve params, priv key, pub key or coordinates + messege = signature.
Its easy to read about it but I stuck to figure out what "messege" is in the bitcoin blockchain info? How this related to tx hashes? tx amount? what actually we encoding during the transaction and how to get this input/outut in readable format.