Can you tell which type of wallet a user is completing the transactions on when viewing say, the Blockchain? Reason is, a friend and I are debating that on the Blockchain you can determine whether one is using an online wallet vs a hardware wallet. I need some support on whether this is true. Cheers.
Nope, it's impossible to say between software, online, and hardware wallets. Though it MIGHT be possible to know if a certain address is an address of a certain exchange or not by looking at the transactions of that certain wallet though a blockchain explorer.
Not 100% sure, so correct me if I'm wrong for those with more knowledge on this.