> 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/builder.md).

# Building the SDK

## Creating a CafSmartAuth SDK instance

To create a `CafSmartAuth` instance, use the `CafBuilder` class. This class provides a set of methods to configure the SDK instance.

### Builder Properties

| Property      | Type   | Description                            | Required |
| ------------- | ------ | -------------------------------------- | :------: |
| `mobileToken` | String | Mobile token provided by the platform. |     ✅    |

### Builder Methods

| Method                     | Type                      | Description                                                                              | Required |
| -------------------------- | ------------------------- | ---------------------------------------------------------------------------------------- | :------: |
| `setStage(_:)`             | `CAFStage`                | Defines the environment stage (e.g., `.prod`, `.beta`). Default is `.prod`.              |     ❌    |
| `setEmailURL(_:)`          | `URL`                     | Sets the email authentication URL. Must use HTTPS protocol.                              |     ❌    |
| `setPhoneURL(_:)`          | `URL`                     | Sets the phone authentication URL. Must use HTTPS protocol.                              |     ❌    |
| `setPlatform(_:)`          | `CafSdkPlatform`          | Sets the platform on which the SDK is running. Default is `.nativeIos`.                  |     ❌    |
| `setLivenessSettings(_:)`  | `CafFaceLivenessSettings` | Sets the face liveness authentication settings.                                          |     ❌    |
| `setThemeConfigurator(_:)` | `CafThemeConfigurator`    | Sets the theme configuration for the SDK. Customize appearance for light and dark modes. |     ❌    |

### Theme Configuration

To customize the appearance of the SDK, use the theme configurator methods. Two structures are used for theme configuration: `CafThemeConfigurator` and `CafTheme`.

#### CafThemeConfigurator

```swift
public struct CafThemeConfigurator {
    public var lightTheme: CafTheme
    public var darkTheme: CafTheme

    public init(lightTheme: CafTheme = CafTheme(),
                darkTheme: CafTheme = CafTheme()) {
        self.lightTheme = lightTheme
        self.darkTheme = darkTheme
    }
}
```

This structure allows you to define separate themes for light and dark modes. Each theme is defined by a CafTheme structure.

```swift
public struct CafTheme {
    public var backgroundColor: UIColor
    public var textColor: UIColor
    public var linkColor: UIColor
    public var boxBorderColor: UIColor
    public var boxFilledBorderColor: UIColor
    public var boxBackgroundColor: UIColor
    public var boxFilledBackgroundColor: UIColor
    public var boxTextColor: UIColor
    public var progressColor: UIColor

    public init(backgroundColor: String = "#FFFFFF",
                textColor: String = "#FF000000",
                linkColor: String = "#004AF7",
                boxBorderColor: String = "#cbcbcb",
                boxFilledBorderColor: String = "#004AF7",
                boxBackgroundColor: String = "#D3D3D3",
                boxFilledBackgroundColor: String = "#D3D3D3",
                boxTextColor: String = "#004AF7",
                progressColor: String = "#004AF7") {
        self.backgroundColor = UIColor(hex: backgroundColor)
        self.textColor = UIColor(hex: textColor)
        self.linkColor = UIColor(hex: linkColor)
        self.boxBorderColor = UIColor(hex: boxBorderColor)
        self.boxFilledBorderColor = UIColor(hex: boxFilledBorderColor)
        self.boxBackgroundColor = UIColor(hex: boxBackgroundColor)
        self.boxFilledBackgroundColor = UIColor(hex: boxFilledBackgroundColor)
        self.boxTextColor = UIColor(hex: boxTextColor)
        self.progressColor = UIColor(hex: progressColor)
    }
}
```

This structure defines various appearance attributes for the SDK. You can customize colors for backgrounds, text, links, borders, and progress indicators by providing hex string values.

### Example

```swift
import CafSmartAuth

let smartAuth: CafSmartAuthSdk?

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"
                ),
                darkTheme: CafTheme(
                    backgroundColor: "#000000",
                    textColor: "#FFFFFF"
                )
            )
        )
        .build()
}
```


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