create new policy:

[FantZero]

my Q: User A is the provider, user B is the consumer, A create asset1 based on student table, A create strategy policy1 (include log callback interface: http://localhost:19194/protocol/logback), after B and A negotiate the contract, The log callback interface in policy1 is called by B when B get each row of data in asset1.
Who can provide the next create-policy.json and ConstraintFunction.java code in provider, thank you!

[harnvo]

Don't quite understand what in precise do you need to implement.

Why a constraint function should affect the behavior of callback? Is there anything you have already implemented to show us? And if so, what are the things you tried and what are the impediments?