Flutter plugin

Latest release: Version 1.31.3 (Changelog)


  1. Add the following dependency to your package pubspec.yaml file.
  flutter_idensic_mobile_sdk_plugin: ^1.31.3
  1. Run the following command.
flutter pub get




Use Kotlin 1.7.10 and API level 21 (Android 5.0) or higher in your Android project.




Disable bitcode for the whole project and for the flutter_idensic_mobile_sdk_plugin target under Pods project, in particular (Pods -> flutter_idensic_mobile_sdk_plugin -> Build Settings -> Enable Bitcode -> No).

  1. Update ios/Podfile as follows.
platform :ios, '9.0'

source 'https://cdn.cocoapods.org/'
source 'https://github.com/SumSubstance/Specs.git'

# Enable MRTDReader (NFC) module

# Enable VideoIdent module
  1. Update Info.plist to have a description for the usage of the camera, microphone, photo library and geolocation.
plutil -insert "NSCameraUsageDescription" -string "Let us take a photo" ios/Runner/Info.plist
plutil -insert "NSMicrophoneUsageDescription" -string "Time to record a video" ios/Runner/Info.plist
plutil -insert "NSPhotoLibraryUsageDescription" -string "Let us pick a photo" ios/Runner/Info.plist
plutil -insert "NSLocationWhenInUseUsageDescription" -string "Please provide us with your geolocation data to prove your current location" ios/Runner/Info.plist

MRTDReader (NFC)

The MRTDReader is a module that allows the SDK to detect and read the electronic chips placed on MRTD documents via NFC.

For Android, the module comes out of the box. To enable the module for iOS, follow the instructions below:

  1. Update ios/Podfile.
# Enable MRTDReader (NFC) module
  1. Open up the iOS project in XCode.
xed ios/
  1. Turn on the Near Field Communication Tag Reading capability for your project target.
  2. Add to the application Info.plist file.
<string>Let us scan the document for more precise recognition</string>


The VideoIdent is an optional module that is required only if you are going to use the Video identification during the verification flow.

To enable the module:

  1. Update ios/Podfile.
# Enable VideoIdent module
  1. Open up the iOS project in XCode.
xed ios/
  1. Add Background mode capability for your project target and select the Audio, AirPlay, and Picture in Picture option required for the video call not to be broken when the application goes into background.
  2. To enable VideoIdent module on Android, add the following dependency to your 'android/app/build.gradle' file.

dependencies {
    // add dependency to enable videoident
    implementation "com.sumsub.sns:idensic-mobile-sdk-videoident:1.31.3"




Before launching, make sure you have configured your verification level and access token.


import 'package:flutter_idensic_mobile_sdk_plugin/flutter_idensic_mobile_sdk_plugin.dart';

void launchSDK() async {

  // From your backend get an access token for the applicant to be verified.
  // The token must be generated with `levelName` and `userId`,
  // where `levelName` is the name of a level configured in your dashboard.
  // The sdk will work in the production or in the sandbox environment
  // depend on which one the `accessToken` has been generated on.
  final String accessToken = "your_access_token";

  // The access token has a limited lifespan and when it's expired, you must provide another one.
  // So be prepared to get a new token from your backend.
  final onTokenExpiration = () async {
    // call your backend to fetch a new access token (this is just an example)
    return Future<String>.delayed(Duration(seconds: 2), () => "your new access token");

  final SNSStatusChangedHandler onStatusChanged = (SNSMobileSDKStatus newStatus, SNSMobileSDKStatus prevStatus) {
    print("The SDK status was changed: $prevStatus -> $newStatus");

  final snsMobileSDK = SNSMobileSDK.init(accessToken, onTokenExpiration)
    .withHandlers( // optional handlers
      onStatusChanged: onStatusChanged
    .withDebug(true) // set debug mode if required
    .withLocale(Locale("en")) // optional, for cases when you need to override the system locale

  final SNSMobileSDKResult result = await snsMobileSDK.launch();

  print("Completed with result: $result");

The return type of the snsMobileSDK.launch() method is the Future of SNSMobileSDKResult type. Use it to determine the SDK status upon its closure.

Here is an example of the result.

  success: false,
  status: SNSMobileSDKStatus.Failed,
  errorType: SNSMobileSDKErrorType.Unauthorized,
  errorMsg: "Unauthorized access with accessToken=[your access token]",
  actionResult: null


Next, you are able to use the launchSNSMobileSDK(), as defined above, in order to launch the SDK.

For example:

body: Center(
  child: Column(
    mainAxisAlignment: MainAxisAlignment.center,
    children: <Widget>[
        alignment: Alignment.center,
        child: RaisedButton(onPressed: () => launchSDK(),
        child: Text("Launch Sumsub SDK")),


By default, once the applicant is approved the SDK will be dismissed in 3 seconds automatically. You can adjust this time interval or switch the automatic dismissal off by setting value of zero.


Also, in case you need to close the SDK programmatically, here is what you can do.




If it is required, you could provide an email and/or phone number that will be assigned to the applicant initially.

  "email": "...",
  "phone": "..."

Preferred Documents

For IDENTITY* steps, it is possible to specify the preferred country and document type to be selected automatically, bypassing the DocType Selector screen. Note that the parameters provided will be applied only if the corresponding combination of country and idDocType is allowed at the step according to the level configuration.

  "IDENTITY2": {

Disable Google ML Kit



This is an Android-specific feature.

The SumSub SDK uses Google ML Kit face detection library if it is available with the application and builtin Android face detection otherwise. You can disable using ML Kit even if it is available.



You can customize or localize the texts used within the SDK through the MSDK Translations tool in the dashboard.

The language of the texts will be set according to the system locale, but you could override it with the locale you desire:


For a complete list of supported locales, see this article.


In addition to the MSDK Translations tool and .withLocale, you can use .withStrings option that allows you to define the strings locally.

This may be helpful for iOS apps if you would like to avoid the Wordless Oops screen that could be rendered in case the network happens to be down during the SDK initialization and force the SDK to draw the Network Oops instead.

  "sns_oops_network_title": "Oops! Seems like the network is down.",
  "sns_oops_network_html": "Please check your internet connection and try again.",
  "sns_oops_action_retry": "Try again",

Note that .withLocale does not affect these strings, thus it is up to you to use the required localization.


The SDK collects and sends usage data to Sumsub servers. We do not track any sensitive data. Only general usage statistics is sent to us. It includes screen navigation events, UI controls interaction events and so on.

We interpret the usage data in order to improve Sumsub. None of the data is sold or transferred to third parties, and we do not use it for advertisement.

If you still want to disable this feature, you can use the following to do this.



Various events happening along the processing could be delivered into an optional onEvent handler.

final SNSEventHandler onEvent = (SNSMobileSDKEvent event) {
  print("onEvent: $event");

final snsMobileSDK = SNSMobileSDK.init(accessToken, onTokenExpiration)
    onEvent: onEvent

Each Event has eventType and some parameters packed into payload map, for example.

  eventType: "StepInitiated",
  payload: {
    "idDocSetType": "IDENTITY"

Possible events:

"applicantId": "$applicantId"
The applicant $applicantId has been loaded.
"idDocSetType": "$idDocSetType"
Step $idDocSetType has been initiated.
"idDocSetType": "$idDocSetType",
"isCancelled": false

Step $idDocSetType has been fulfilled or cancelled.
"eventName": "$eventName",
"eventPayload": object
Analytics event $eventName has occurred.

Applicant Actions

To run the iOS SDK in Applicant actions mode, you need to have:

  1. A verification level with the Applicant actions type.
  2. An access token created with the userId, levelName, and externalActionId parameters.

Aside from the notes above, use the SDK the same way that you do with regular levels, but the further processing may differ depending on the action type.

The action type is configured for a particular level in the Dashboard and can be one of the following:

Additional Verification

Additional verification actions are processed completely identically to the regular level verifications. You configure and manage the SDK the same way. Nothing special is required.



The Payment methods step is not supported at the moment.

Face Auth

Face authentication actions are handled in a specific manner. The user is taken to the FaceScan (Liveness) screen directly and once the action is complete, the SDK will be automatically closed.

When an action is completed the status will be set to .ActionCompleted and the result structure will contain the actionResult field that describes the outcome of the last invocation:

  success: true,
  status: SNSMobileSDKStatus.ActionCompleted,
  errorType: null,
  errorMsg: null,
  actionResult: SNSMobileSDKActionResult(
    actionId: "5f9186b8aee05c5fa1ae11bb",
    answer: SNSMobileSDKAnswerType.Green

An empty value of actionResult.answer means that the action was cancelled.

Action Result Handler

In addition, for Face Auth actions, there is an optional onActionResult handler that allows you to handle the action result upon its arrival from the backend.

The user sees the Processing... screen at this moment.

final SNSActionResultHandler onActionResult = (SNSMobileSDKActionResult result) {
  print("onActionResult: $result");

  // you must return a `Future` that in turn should be completed with a value of `SNSActionResultHandlerReaction` type
  // you could pass `.Cancel` to force the user interface to close, or `.Continue` to proceed as usual
  return Future.value(SNSActionResultHandlerReaction.Continue);

final snsMobileSDK = SNSMobileSDK.init(accessToken, onTokenExpiration)
    onActionResult: onActionResult

API Reference


An object describing the result of the last SDK launch:

successboolThe boolean value indicates whether there was an error at the moment the SDK was closed. Use errorType and errorMsg to see the reasons of the error, if there is one.
statusSNSMobileSDKStatusSDK status expressed with SNSMobileSDKStatus enum.
errorTypeSNSMobileSDKErrorType?Error reason expressed with SNSMobileSDKErrorType enum.
errorMsgString?A verbose error description.
actionResultSNSMobileSDKActionResult?Describes the result of the latest applicant Face Auth action's invocation, if any.


An enum describing the possible SDK statuses:

ReadySDK is initialized and ready to be presented.
FailedSDK has failed for some reason (see errorType and errorMsg for details).
InitialNo verification steps have been passed yet.
IncompleteSome, but not all, of the verification steps have been completed.
PendingVerification is pending.
TemporarilyDeclinedApplicant has been declined temporarily.
FinallyRejectedApplicant has been finally rejected.
ApprovedApplicant has been approved.
ActionCompletedFace Auth action has been completed.


An enum describing the possible reasons for failure:

UnknownUnknown or no failure.
InvalidParametersAn attempt to setup with invalid parameters.
UnauthorizedUnauthorized access detected (most likely accessToken is invalid or expired and couldn't be refreshed).
InitialLoadingFailedInitial loading from the backend has failed.
ApplicantNotFoundNo applicant can be found for the given parameters.
ApplicantMisconfiguredApplicant has been found, but is misconfigured (most likely they lacks ID Docs).
InitializationErrorAn initialization error has occurred.
NetworkErrorA network error has occurred (the user will be presented with the Network Oops screen).
UnexpectedErrorAn unexpected error has occurred (the user will be presented with the Fatal Oops screen).


An object that represents an event happening along the processing:

eventTypeStringEvent type.
payloadMapEvent payload.


An object that represents the Face Auth action's result:

actionIdStringFace Auth action identifier to check the results against the server.
answerSNSMobileSDKAnswerType?Overall result expressed with SNSMobileSDKAnswerType enum.


An enum describing the possible answers:

GreenPositive answer.
RedNegative answer.
YellowNeutral answer.
ErrorSomething went wrong.
IgnoredThe check had not ever been started.


An enum describing the possible reactions passed back from the Action Result Handler:

ContinueProceed as usual.
CancelForce the user interface to close.