Onfido #

Table of contents #

Overview
Getting started
Usage
Language Customisation
UI Customisation
Going live
More Information

Overview #

The Onfido Flutter SDK provides a drop-in set of screens and tools for Flutter applications to capture identity documents and selfie photos and videos for the purpose of identity verification.

It offers a number of benefits to help you create the best identity verification experience for your customers:

Carefully designed UI to guide your customers through the photo and video capture process
Modular design to help you seamlessly integrate the photo and video capture process into your application flow
Advanced image quality detection technology to ensure the quality of the captured images meets the requirement of the Onfido identity verification process, guaranteeing the best success rate
Direct image upload to the Onfido service, to simplify integration

ℹ️

If you are integrating using Onfido Studio please see our Studio integration guide

⚠️ Note: The SDK is only responsible for capturing and uploading photos and videos. You still need to access the Onfido API to manage applicants and perform checks.

Getting started #

Dart 2.12 or higher
Flutter 1.20 or higher
Supports iOS 11+
Supports Android API level 21+
Supports iPads and tablets

1. Obtain an API token #

In order to start integrating, you'll need an API token.

You can use our sandbox environment to test your integration. To use the sandbox, you'll need to generate a sandbox API token in your Onfido Dashboard.

⚠️ Note: You must never use API tokens in the frontend of your application or malicious users could discover them in your source code. You should only use them on your server.

1.1 Regions

Onfido offers region-specific environments. Refer to the Regions section in our API documentation for token format and API base URL information.

2. Create an applicant #

To create an applicant from your backend server, make a request to the 'create applicant' endpoint, using a valid API token.

Note: Different report types have different minimum requirements for applicant data. For a Document or Facial Similarity report the minimum applicant details required are first_name and last_name.

$ curl https://api.onfido.com/v3/applicants \
    -H 'Authorization: Token token=<YOUR_API_TOKEN>' \
    -d 'first_name=John' \
    -d 'last_name=Smith'

The JSON response will return an id field containing a UUID that identifies the applicant. Once you pass the applicant ID to the SDK, documents and live photos and videos uploaded by that instance of the SDK will be associated with that applicant.

3. Configure the SDK with token #

You'll need to generate and include an SDK token every time you initialize the SDK.

To generate an SDK token, make a request to the 'generate SDK token' endpoint.

$ curl https://api.onfido.com/v3/sdk_token \
  -H 'Authorization: Token token=<YOUR_API_TOKEN>' \
  -F 'applicant_id=<APPLICANT_ID>' \
  -F 'application_id=<YOUR_APPLICATION_BUNDLE_IDENTIFIER>'

Parameter	Notes
`applicant_id`	required Specifies the applicant for the SDK instance.
`application_id`	required The application ID (for iOS "application bundle ID") that was set up during development. For iOS, this is usually in the form `com.your-company.app-name`. Make sure to use a valid `application_id` or you'll receive a 401 error.

⚠️ SDK tokens expire after 90 minutes.

4. Add the SDK dependency #

flutter pub add onfido_sdk

5. Update your iOS Configuration files #

Change ios/Podfile to use version 11:

platform :ios, '11.0'

The SDK uses the device camera. You're required to have the following keys in your application's ios/Runner/Info.plist file:

NSCameraUsageDescription
NSMicrophoneUsageDescription

<key>NSCameraUsageDescription</key>
<string>Required for document and facial capture</string>
<key>NSMicrophoneUsageDescription</key>
<string>Required for video capture</string>

Note: All keys will be required for app submission.

Usage #

1. Creating the SDK configuration #

Once you have an added the SDK as a dependency, and you have a SDK token, you can configure the SDK:

final Onfido onfido = Onfido(
  sdkToken: apiToken,
  iosLocalizationFileName: "onfido_ios_localisation"
);

1.1 Parameter details

sdkToken: Required. This is the JWT sdk token obtained by making a call to the SDK token API. See section Configuring SDK with Tokens.
iosLocalizationFileName: Optional. This is the file name for configuring the localisation for iOS only. See section Language Customisation for the details.

2. Start the flow #

startOnfido() async {
  try {
    final response = await onfido.start(
      flowSteps: FlowSteps(
        proofOfAddress: true,
        welcome: true,
        documentCapture: DocumentCapture(),
        faceCapture: FaceCaptureType.photo,
      ),
    );
    ... handle response
  } catch (error) {
    ... handle error
  }
}

2.1 Parameter details

flowSteps: Required. This object is used to toggle individual screens on and off and set configurations inside the screens.
- FlowSteps.welcome: Optional. This toggles the welcome screen on or off. If omitted, this screen does not appear in the flow.
- FlowSteps.proofOfAddress: Optional. In the Proof of Address step, a user picks the issuing country and type of document that proves their address before capturing the document with their phone camera or uploading it.
- FlowSteps.documentCapture: Optional. In the Document step, a user can pick the type of document to capture and its issuing country before capturing it with their phone camera. Document selection and country selection are both optional screens. These screens will only show to the end user if specific options are not configured to the SDK.
  - DocumentCapture.documentType: Required if countryCode is specified. Valid values in document_type.dart.
  - DocumentCapture.countryCode: Required if documentType is specified. Valid values in country_code.dart.
- FlowSteps.faceCapture: Optional. In the Face step, a user can use the front camera to capture either a live photo of their face, or a live video. Valid values in face_capture_type.dart.
- FlowSteps.enableNFC: Optional. This toggles the ePassport NFC extraction feature. If omitted, this feature is not enabled in the flow. There is also application configuration changes needed to use this feature. To do that please follow Onfido Developer Hub

3. Handling responses #

Success handling

When the user has reached the end of the flow, you will receive the response with [OnfidoResult] and you can now create a check on your backend server.

[OnfidoResult] is a list with multiple results. The results are different objects, each with its own associated value (also known as payload). This object, OnfidoResult, can have the following values:

OnfidoResult(
  document: DocumentResult(
    front: DocumentSideResult(id: "id"),
    typeSelected: "passport",
    countrySelected: null,
  ),
  face: FaceResult(
    id: "id",
    variant: FaceCaptureType.video,
  ),
  proofOfAddress: ProofOfAddressResult(
    id: "id",
    type: "bank_building_society_statement",
    issuingCountry: "BRA",
  ),
);

Error handling

You will receive a PlatformException if something goes wrong and the SDK will reject the promise falling into the catch block. The failure can be triggered during the initialisation, user leaving the SDK flow without completing it and run time exceptions.

Error Code	Notes
`exit`	When the user has left the SDK flow without completing.
`error`	When something happens in run time, e.g. camera permission denied by the user.
`configuration`	When something happens before initializing the SDK, may be caused by invalid configuration.

Language Customisation #

The SDK supports and maintains the following 7 languages:

English (en) 🇬🇧
Spanish (es) 🇪🇸
French (fr) 🇫🇷
German (de) 🇩🇪
Italian (it) 🇮🇹
Portuguese (pt) 🇵🇹
Dutch (nl) 🇳🇱

However, you can add your own translations.

Android #

By default, custom localisation is enabled on Android. There is no configuration needed on Flutter SDK to enable it. You could also provide custom translation for a locale that we don’t currently support, by having an additional XML strings file inside your resources folder for the desired locale. See Localisation section of Android SDK repo for the details.

iOS #

You can also provide a custom translation for a locale that Onfido doesn't currently support. There is a simple configuration needed on the Flutter SDK to enable custom localisation.

Add this statement to your configuration object.

final Onfido onfido = Onfido(
  ...
  iosLocalizationFileName: '<Your .strings file name in iOS app bundle>'
);

Navigate to the iOS folder cd ios, and open your XCode workspace.
Follow the instructions for iOS Localisation to add a new custom language or override existing translations.
You can find the keys that need to be translated in the iOS SDK repo.

UI Customisation #

The SDK supports the customisation of colors and fonts used in the SDK flow.

Android #

There is no configuration needed on Flutter SDK to enable it. See UI Customisation section on Android SDK for more details.

iOS #

You can use the IOSAppearance object to customise the iOS application.

For example:

final Onfido onfido = Onfido(
  iosAppearance: IOSAppearance(
      fontBold: "<Font-Name>",
      supportDarkMode: false,
      fontRegular: "<Font-Name>",
      secondaryTitleColor: Colors.yourColor,
      primaryColor: Colors.yourColor,
      buttonCornerRadius: 10,
      primaryTitleColor: Colors.yourColor,
      bubbleErrorBackgroundColor: Colors.yourColor,
      primaryBackgroundPressedColor: Colors.yourColor,
      secondaryBackgroundPressedColor: Colors.yourColor),
);

Error handling #

The Error object returned as part of PlatformException which translate the errors from native side to Dart. You can identify the type of the error from the error message

    // This happens if the user denies permission to the SDK during the flow
    PlatformException(error, The operation couldn’t be completed. (Onfido.OnfidoFlowError error 2.), cameraPermission, null)
    
    // This happens when the SDK tries to save capture to disk, maybe due to a lack of space
    PlatformException(error, The operation couldn’t be completed. (Onfido.OnfidoFlowError error 2.), failedToWriteToDisk, null)

    // This happens when the user denies permission for microphone usage by the app during the flow
    PlatformException(error, The operation couldn’t be completed. (Onfido.OnfidoFlowError error 2.), microphonePermission, null)

    // This happens when the SDK receives an error from an API call see [https://documentation.onfido.com/#errors](https://documentation.onfido.com/#errors) for more information
    PlatformException(error, The operation couldn’t be completed. (Onfido.OnfidoFlowError error 2.), upload, null)

    // This happens when an unexpected error occurs. Please contact [ios-sdk@onfido.com](mailto:ios-sdk@onfido.com?Subject=ISSUE%3A) when this happens
    PlatformException(error, The operation couldn’t be completed. (Onfido.OnfidoFlowError error 2.), exception, null)

    // This happens when you are using an older version of the iOS SDK and trying to access a new functionality from workflow. You can fix this by updating the SDK
    PlatformException(error, The operation couldn’t be completed. (Onfido.OnfidoFlowError error 2.), versionInsufficient, null)

    // The flow was exited prematurely by the user. The reason can be `.userExit` or `.consentDenied`
    PlatformException(exit, "User canceled the flow", null, null)

Going live #

Once you are happy with your integration and are ready to go live, please contact client-support@onfido.com to obtain live versions of the API token and the mobile SDK token. You will have to replace the sandbox tokens in your code with the live tokens.

A few things to check before you go live:

Make sure you have entered correct billing details inside your Onfido Dashboard

More Information #

Sample App #

We have included sample app to show how to integrate with the Onfido Flutter SDK. See the SampleApp directory for more information.

Support #

Please open an issue through GitHub. Please be as detailed as you can. Remember not to submit your token in the issue. Also check the closed issues to check whether it has been previously raised and answered.

If you have any issues that contain sensitive information please send us an email with the ISSUE: at the start of the subject to flutter-sdk@onfido.com

Previous version of the SDK will be supported for a month after a new major version release. Note that when the support period has expired for an SDK version, no bug fixes will be provided, but the SDK will keep functioning (until further notice).

How is the Onfido Flutter SDK licensed? #

The Onfido Flutter SDK is available under the MIT license.

onfido_sdk 2.1.0
onfido_sdk: ^2.1.0 copied to clipboard

Metadata

Onfido #

Table of contents #

Overview #

Getting started #

1. Obtain an API token #

1.1 Regions

2. Create an applicant #

3. Configure the SDK with token #

4. Add the SDK dependency #

5. Update your iOS Configuration files #

Usage #

1. Creating the SDK configuration #

1.1 Parameter details

2. Start the flow #

2.1 Parameter details

3. Handling responses #

Success handling

Error handling

Language Customisation #

Android #

iOS #

UI Customisation #

Android #

iOS #

Error handling #

Going live #

More Information #

Sample App #

Support #

How is the Onfido Flutter SDK licensed? #

← Metadata

Publisher

Metadata

License

Dependencies

More

onfido_sdk 2.1.0 onfido_sdk: ^2.1.0 copied to clipboard

Metadata

Onfido #

Table of contents #

Overview #

Getting started #

1. Obtain an API token #

1.1 Regions

2. Create an applicant #

3. Configure the SDK with token #

4. Add the SDK dependency #

5. Update your iOS Configuration files #

Usage #

1. Creating the SDK configuration #

1.1 Parameter details

2. Start the flow #

2.1 Parameter details

3. Handling responses #

Success handling

Error handling

Language Customisation #

Android #

iOS #

UI Customisation #

Android #

iOS #

Error handling #

Going live #

More Information #

Sample App #

Support #

How is the Onfido Flutter SDK licensed? #

← Metadata

Publisher

Metadata

License

Dependencies

More

onfido_sdk 2.1.0
onfido_sdk: ^2.1.0 copied to clipboard