Ability to exchange points with freezing points upon receipt. How to organize?

Question

CMS

Hello, I'm not using phpbb yet, but I'm very interested in it.
You need the ability to exchange points. Found the "Ultimate Points" extension, but I have a question. Can a user send their points to another user using this extension? And is it possible to set it up so that the sent "points" are frozen on the account? To get the so-called "automatic guarantor".
It is necessary that the user can receive points for the service (in advance), while he must complete his work before he can spend the points just transferred by the customer.

Scheme:
The customer sends 100 points to the contractor.
The performer sees the replenishment of the account, but the points are frozen.
The performer is doing his job.
The customer can unfreeze the points that he sent to the contractor. OR points will be automatically unfrozen after a certain time.
Then the performer can transfer points to another user according to the same scheme.

Is it possible to set up such a system on this engine?
And maybe there is such or similar function in Ultimate Points?

Maybe this can be implemented on another open source engine?