Understanding PSM

[pierreeliseeflory]

Hi,

I have a hard time understanding the implementation of PSM here. I don't see where the OPRF of the queries is computed especially since the client has access to the plaintext of the value passed by the server at the end. How would someone adapt the example to use real data instead of arbitrary buckets retrieval ?
Maybe running the basic PSM with a single query would help but there is no example implementation.