Using an API in a Block Chain Project?

Most of the data and most applications, you don't really actually care about. If i could see everyone else's order, because that means everyone else can see my order. I mean, that sort of thing is very easily done in a centralized data basis. It really doesn't make sense to have a decentralized data base for it. And then, so that would be the example of using receipts owbout in the examples of using a central dota bas with an api. Ye.