import UIKit
import YoonitHandshake

class HandshakeViewController: HandshakeListener {
                        
    private var handshake = Handshake()
                        
    func updateFingerprints() {
        self.handshake.handshakeListener = self
        self.handshake.updateFingerprints(
            "YOUR PUBLIC KEY",
            "YOUR SERVICE URL"
        )
    }
        
    func onResult(_ result: HandshakeResult) {
        switch result {
        case HandshakeResult.OK:
            // - Everything is OK;
            // - No Action is required;

        case HandshakeResult.STORE_IS_EMPTY:
            // - The update request succeeded;
            // - Result is still an empty list of certificates;
            // - May loading & validating of remote data succeeded;
            // - All loaded certificates are already expired;"

        case HandshakeResult.NETWORK_ERROR:
            // - The update request failed on a network communication.

        case HandshakeResult.INVALID_DATA:
            // The update request returned the data which did not pass the signature validation.

        case HandshakeResult.INVALID_SIGNATURE:
            // The update request returned the data which did not pass the signature validation.
            
        case HandshakeResult.INVALID_URL_SERVICE:
            // The url service does not exist or is invalid.
        }
    }
}