Serialize and Deserialize SchemeSwitching in openfhe-python

Library Questions
1

Dear Team,

For the scheme-switching.py example mentioned on the github repository of openfhe python, I want to replicate it in form of client server environment. This requires serialization. Now I have serialized cryptoContext, EvalMultKey and EvalAutomorphismKey. But I am not able to serialize and schemeSwitchingKey. Without serializing it, I get the following error on server after I try of deserialize the keys execute the command. Can you guide me on how to serialize this here?

RuntimeError: /root/openfhe-python-packager/build/openfhe-development/src/pke/lib/scheme/ckksrns/ckksrns-schemeswitching.cpp:l.1187:EvalSlotsToCoeffsSwitch(): Precomputations for 128 slots were not generated Need to call EvalCKKSToFHEWPrecompute to proceed

2

I suggest looking at the following (C++) example: openfhe-development/src/pke/examples/scheme-switching-serial.cpp at v1.5.0 · openfheorg/openfhe-development · GitHub along with the (Python) examples of scheme switching without parallelization: openfhe-python/examples/pke/scheme-switching.py at v1.5.0.0 · openfheorg/openfhe-python · GitHub. Same functions are exposed through the Python interface. For instance, you can add EvalCKKStoFHEWPrecompute as suggested by the exception.