i was already trying to do it. account 1 have 10 algo balance, and the second 0 algo but wants to opt in for a specific asset. I created a grouped transaction where the first account is paying both fees. the issue is that I need to have a minimum balance on the second account.
and yes my main issue is that fo each user I need to pay 0.2 algo (too much). i’am working on an app and i’am targeting hundreds of users.
opt in should have a flat fee in $ not algos. you see what I mean ?