The opponent won't be able to accept the bet if he doesn't have enough balance. Implementing a feature like this would allow a user to find out how much balance the user has by "probing" the amounts.

Hm, yeah, you right.

But aren't you doing this anyway? Probably remote side could setup this in settings - does it allow to see what balance is, and give exact bet.

But now, with time passed, I actually I think this is not super argent problem.

urgent*