CA bundle for certificate verification

How do I pin my CA bundle to SSL Socket, so I can be sure, no one will read the app traffic through Wireshark?
I was trying to do something like that, but it always failed.
Tried `sys.ssl.Socket.setCA(cert:sys.ssl.Certificate);`, but it didn't work.
Does someone have the code for cpp build of certificate pinning for their HTTP request to the API server, and then give it to me, please?

Start with sys.ssl.Socket.setCA(cert:sys.ssl.Certificate) and the C++ build path mentioned in the request. Clarify whether the goal is CA-bundle configuration or certificate pinning, then define a reproducible API-server test and the expected certificate-verification behavior before implementation.

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