Confirmation window

I suggest that we add a confirmation window to every transaction with gold, I've mistakenly pressed the button where it let's me buy 4000 from a specific resource for 2500 piece of gold numerous times, so to prevent this, add a window that says for example: Are you sure you want to buy 4k rare materials for 2.5k gold?. Or : Tap to confirm. Its really annoying to lose my gold in such dumb way. Thank you very much.