But as i said i have some ideas how to simplify it..
Can you share some more details and how you plan to simplify it? I think that it actually being over complicated a bit and coin age isn't relevant when you're dealing with exchanges anyways because they're constantly moving the coins back and forth between their own wallet and therefore there's no real way to see how much each person has earned regardless
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This is not about an exchange and moving coins within one wallet. So, yes it can be very simple i guess i miss read your first post.
One have to require people to not move their coins in a certain time period that is a couple of days more then minimum coin age to ensure they stake. Maybe 30 days. If they move them before no interrest is payed.