FaceLiveness

It brings cutting-edge live facial verification and fingerprint authentication technology into your Flutter applications, offering a seamless and secure way to authenticate users.

Requirements

Flutter Version
Flutter 1.20+
Dart 2.15+
Android Version
minSdk 21
compileSdk 33
iOS Version
iOS Target 12.0
Xcode 14.3.1+
Swift 5.3.2+

Sending your app to Play Store

To publish your app on the Google Play Store, you must complete a data safety form. Since we integrate with the FingerPrintJS SDK, you'll need to provide the following information:

Question in Google Play Console's data safety form Response
Does your app collect or share any of the required user data types? Yes.
What type of data is collected? Device or other identifiers.
Is this data collected, shared, or both? Collected.
Is this data processed ephemerally? Yes.
Why is this user data collected? Fraud Prevention, Security, and Compliance.

Runtime permissions

Android

Permission Reason Required
CAMERA Capturing the selfie in policies with facial verification Yes

iOS

Permission Reason Required
Privacy - Camera Usage Description Capturing the selfie in live facial verification policies Yes

Platform Configurations

Android

If your version of Gradle is earlier than 7, add these lines to your build.gradle.

allprojects {
  repositories {
    ...
    maven { url 'https://repo.combateafraude.com/android/release' }
    maven { url 'https://raw.githubusercontent.com/iProov/android/master/maven/' }
    maven { url 'https://maven.fpregistry.io/releases' }
    maven { url 'https://jitpack.io' }
  }
}

If your version of Gradle is 7 or newer, add these lines to your settings.gradle.

dependencyResolutionManagement {
  repositories {
    ...
    maven { url 'https://repo.combateafraude.com/android/release' }
    maven { url 'https://raw.githubusercontent.com/iProov/android/master/maven/' }
    maven { url 'https://maven.fpregistry.io/releases' }
    maven { url 'https://jitpack.io' }
  }
}

Add support for Java 8 to your build.gradle file. Skip this if Java 8 is enabled.

android {
    ...
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

iOS

In the info.plist file, add the permissions below:

<key>NSCameraUsageDescription</key>
<string>To capture the selfie</string>

Usage

Parameter Required
mobileToken: Usage token associated with your CAF account Yes
personId: User identification that registers the user's face for face matching. Currently, this value only accepts the user's CPF. Yes 
FaceLiveness faceLiveness =
        FaceLiveness(mobileToken: mobileToken, peopleId: personId);

// Your SDK customization parameters

final stream = faceLiveness.start();

    stream.listen((event) {

      if (event is FaceLivenessEventConnecting) {
        // The SDK is connecting to the server. You should provide an indeterminate progress indicator
        // to let the user know that the connection is taking place.
      } else if (event is FaceLivenessEventConnected) {
        // The SDK has connected, and the iProov user interface will now be displayed. You should hide
        // any progress indication at this point.
      } else if (event is FaceLivenessEventClosed) {
        // The user canceled face verification, either by pressing the close button at the top of the screen, or sending
        // the app to the background.
      } else if (event is FaceLivenessEventSuccess) {
        // The user was successfully verified/enrolled and the token has been validated.
        // You can access the following properties:
        final signedResponse = event.signedResponse;
      } else if (event is FaceLivenessEventFailure) {
        // The user was not successfully verified/enrolled, as their identity could not be verified,
        // or there was another issue with their verification/enrollment (e.g. lost internet connection).
        // You can access the following properties:
        final errorType = event.errorType
        final errorDescription = event.errorDescription
      }
    });

FaceLiveness Options

Option Required Default Value Android iOS

.setStage(String stage)

Used to redirect the SDK to the desired environment in caf api.

 No CafStage.prod ✅ ✅

.setFilter(String filter)

Set the camera filter applied to the camera preview.

 No CameraFilter.lineDrawing ✅ ✅

.setEnableScreenshots(bool enable)

Used to enable screenshots during the SDK scan.

 No false ✅ ❌

.setEnableLoadingScreen(bool enable)

Used to determines whether the SDK's loading screen will be implemented through client side or if will be used the default screen. If set to 'true,' the loading screen will be a standard SDK screen. If 'false,' You should provide an indeterminate progress indicator.

 No false ✅ ✅

.setImageUrlExpirationTime(String time)

Use to change the default image URL expiration time to retrieve the facial capture.

 No 30 min ✅ ✅

Enums

CafStage

Description Values
Used to set the SDK stage on .setStage(String stage) option. CafStage.prod, CafStage.beta

CameraFilter

Description Values
Used to set the SDK's camera filter on .setFilter(String filter) option. CameraFilter.natural, CameraFilter.lineDrawing

Time

Description Values
Used to set the image URL expiration time on .setImageUrlExpirationTime(String time) option. Time.threeHours, Time.thirtyDays

FaceLiveness Event Streaming

FaceLivenessEventConnecting

The SDK is loading, you can use this event return to set an action in your app, for example, a loading indicator.

FaceLivenessEventConnected

The SDK is not loading anymore, you can use this event return to set a action in your app, for example, you can stop your loading indicator.

FaceLivenessEventClosed

The execution has been cancelled by the user.

FaceLivenessEventSuccess

Event Description
requestId Request identifier.
isAlive Validation of a living person, identifies whether the user passed successfully or not.
token Request token.
userId User identifier provided for the request.
imageUrl Temporary link to the image, generated by our API.
personId User identifier provided for the SDK.
sdkVersion Sdk version in use.
iat Token expiration.

The isAlive parameter is very important, based on this validation, the user can be guided to continue the flow or not. In case of isAlive: true, it would be able to continue with the journey. If isAlive: false, this user is not valid and should be prevented from continuing their journey.

FaceLivenessEventFailure

Parameter Description
String errorType Error type returned by the SDK
String errorDescription Error description message returned by the SDK.
Error type cases Description
unsupportedDevice This error may occur if the device hardware or software does not meet the minimum requirements for facial recognition functionality.
cameraPermission This error typically occurs when the user denies access to the camera or if the app lacks the necessary permissions.
networkException This error may occur due to various network issues such as a lack of internet connection, server timeouts, or network congestion.
tokenException This error may occur if the provided authentication token is invalid, expired, or lacks the necessary permissions to perform facial recognition tasks.
serverException This error is typically returned when there is an issue with the server processing the facial recognition request. This could include server-side errors, misconfigurations, or service interruptions.

Libraries

caf_stage
caf_time
camera_filter
face_liveness
face_liveness_events