Check validity of inputs and gracefully handle the error about enigma-core

[moriaab]

If I try to add "0x" to a pre_code, there is no exception. The following happens:
to_hex fails here https://github.com/enigmampc/enigma-core/blob/develop/enigma-core/app/src/networking/ipc_listener.rs#L309
and then IpcResponse::Error is created (as expected).

@elichai, as far as I understand, we have 2 relevant unwraps:
https://github.com/enigmampc/enigma-core/blob/develop/enigma-core/app/src/networking/messages.rs#L219
https://github.com/enigmampc/enigma-core/blob/develop/enigma-core/app/src/main.rs#L37
But I don't see any problems with them in this case.
This defect reveals some issue. Although the problem is wrong user input, system error is returned. Is this what we want?

[elichai]

That's weird. can you give me a sample of data?
I can't see any unwraps there.

[moriaab]

This defect is planned to be fixed as part of general improvement of treating wrong inputs for deployment and computation of secret contracts.