I am already building it. Its 80% done.
Why you ask?? Because I want to profit of the fee each sale creates??
Not sure...
Maria3.0
I like ideas which try to make a cryptocurrency useful and interesting for the mass of people, thats why i ask.
But i don't like it much if the creator do it firstly for his own profit, as the reason behind this idea!
And if it should help you i try to answer your questions:
Question number 1:
What is a Callback?
A activity which follow after a defined event.
Question number 2:
What is middle-ware?
This could be a software which provides services between software applications.
Question number 3:
What is the altcoin that works exactly like bitcoin?
"the altcoin" sounds like you ask for one explicit. But there are more... generally every 1:1 copy works like bitcoin.