> For the complete documentation index, see [llms.txt](https://docs.caf.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.caf.io/caf-sdk/ios/standalone-modules/cafsmartauth/source-code.md).

# Source Code

```swift
import UIKit
import CafSmartAuth

class MainViewController: UIViewController {
    private var smartAuth: CafSmartAuthSdk?

    override func viewDidLoad() {
        super.viewDidLoad()
        setupCafSmartAuth()

        let verifyPolicyButton = UIButton(type: .system)
        verifyPolicyButton.setTitle("Verify Policy", for: .normal)
        verifyPolicyButton.addTarget(self, action: #selector(verifyPolicy), for: .touchUpInside)
        view.addSubview(verifyPolicyButton)

        // Layout constraints for button (if needed)
    }

    private func setupCafSmartAuth() {
        smartAuth = CafSmartAuthSdk.CafBuilder(mobileToken: "myMFAToken")
            .setStage(.prod)
            .setEmailURL(URL(string: "https://myEmailUrl.com")) // Not mandatory
            .setPhoneURL(URL(string: "https://myPhoneUrl.com")) // Not mandatory
            .setLivenessSettings(
                CafFaceLivenessSettings(
                    faceLivenessToken: "myFaceAuthToken",
                    useLoadingScreen: false,
                    filter: .lineDrawing
                )
            )
            .setThemeConfigurator(
                CafThemeConfigurator(
                    lightTheme: CafTheme(
                        backgroundColor: "#FFFFFF",
                        textColor: "#000000",
                        linkColor: "#004AF7",
                        boxBorderColor: "#cbcbcb",
                        boxFilledBorderColor: "#004AF7",
                        boxBackgroundColor: "#D3D3D3",
                        boxFilledBackgroundColor: "#D3D3D3",
                        boxTextColor: "#004AF7",
                        progressColor: "#004AF7"
                    ),
                    darkTheme: CafTheme(
                        backgroundColor: "#000000",
                        textColor: "#FFFFFF",
                        linkColor: "#004AF7",
                        boxBorderColor: "#cbcbcb",
                        boxFilledBorderColor: "#004AF7",
                        boxBackgroundColor: "#D3D3D3",
                        boxFilledBackgroundColor: "#D3D3D3",
                        boxTextColor: "#004AF7",
                        progressColor: "#004AF7"
                    )
                )
            )
            .build()
    }

    @objc private func verifyPolicy() {
        smartAuth?.verifyPolicy(
            personID: "userDocument",
            policyId: "myPolicyId",
            listener: setupListener()
        )
    }

    private func setupListener() -> CafVerifyPolicyListener {
        return { result in
            switch result {
            case .onSuccess(let response):
                print("CafVerifyPolicyListener.onSuccess isAuthorized: \(response.isAuthorized)")
                print("CafVerifyPolicyListener.onSuccess attestation: \(response.attestation)")

            case .onPending(let response):
                print("CafVerifyPolicyListener.onPending isAuthorized: \(response.isAuthorized)")
                print("CafVerifyPolicyListener.onPending attestation: \(response.attestation)")

            case .onError(let error):
                print("CafVerifyPolicyListener.onError failure: \(error.localizedDescription)")

            case .onCanceled(let error):
                print("CafVerifyPolicyListener.onCanceled failure: \(error.localizedDescription)")

            case .onLoading(let isLoading):
                print("CafVerifyPolicyListener.onLoading isLoading: \(isLoading)")

            case .onLoaded(let isLoaded):
                print("CafVerifyPolicyListener.onLoaded isLoaded: \(isLoaded)")
            }
        }
    }
}
```


---

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