1.0.1

General

RuStore In-app updates SDK enable users to be kept up to date with the latest app version on their device. This allows them to stay informed about any performance enhancements or bug fixes that have been implemented.

## User scenario example

Additionally, the SDK offers the ability to notify users of a new version and provide an option to install it. The installation process can occur in the background, while the user can track the progress of the update.

Prerequisites

For RuStore In-app updates SDK to operate correctly, the following conditions need to be met:

Android 7.0 or later.
RuStore app version on the device is up-to-date.
User is authorized in RuStore.
RuStore app is allowed to install applications.

Connecting to project

To get started, follow these steps:

Copy the contents of the Plugins folder from the official RuStore repository on gitflic to Plugins folder of your project.
Restart Unreal Engine.
In the plug-in list (Edit > Plugins > Project > Mobile) select RuStoreAppUpdate and RuStoreCore.
Enable RuStoreCore and RuStoreAppUpdate in YourProject.Build.cs in the list PublicDependencyModuleNames.
In the project settings (Edit → Project Settings → Android) set the Minimum SDK Version parameter at least to 24 and Target SDK Version parameter to 31 or later.

Create update manager

Create update manager before calling library methods.

How to initialize a library

Initialize the library before calling its methods.

Вызов метода Init
URuStoreAppUpdateManager::Instance()->Init();

All operations with the client are also accessible from Blueprints. Below is an initialization example.

info

The Init call ties the object to the scene root, and, If no further work with the object is needed, execute the Dispose method to free memory. The Dispose method call will untie the object from root and securely complete all sent requests.

Deinitialization

Вызов метода Dispose
URuStoreAppUpdateManager::Instance()->Dispose();

Initialization check

If you need to check whether the library is initialized, use the GetIsInitialized method. Method returns a bool value type:

true — if the library is initialised;
false — if Init has not yet been called.

bool bIsInitialized = URuStoreAppUpdateManager::Instance()->GetIsInitialized();

Check for updates

Before requesting an update, check if it is available for your application To check for updates, call the GetAppUpdateInfo method. When this method is called, the following conditions will be verified:

The current version of RuStore is installed on the user's device.
The user and the app are not banned in RuStore.
RuStore app is allowed to install applications.
User is authorized in RuStore.

Upon calling this method, the FURuStoreAppUpdateInfo object will be returned which contains information regarding any required updates. It is recommended to request and cache this object in advance, ensuring a prompt and convenient update download process for the user.

Each GetAppUpdateInfo request returns requestId, that is unique within a single application run. Each event returns requestId of the request that triggered the event.

Вызов метода GetAppUpdateInfo
long requestId = GetAppUpdateInfo(
    [](long requestId, TSharedPtr<FURuStoreAppUpdateInfo, ESPMode::ThreadSafe> response) {
        // Process response
    },
    [](long requestId, TSharedPtr<FURuStoreError, ESPMode::ThreadSafe> error) {
        // Process error
    }
);

The Success callback notification returns a FURuStoreAppUpdateInfo structure in the Response parameter. The structure contains a set of parameters required to determine the update availability.

Структура FURuStoreAppUpdateInfo
USTRUCT(BlueprintType)
struct RUSTOREAPPUPDATE_API FURuStoreAppUpdateInfo
{
    GENERATED_USTRUCT_BODY()

    FURuStoreAppUpdateInfo()
    {
        updateAvailability = EURuStoreUpdateAvailability::UNKNOWN;
        installStatus = EURuStoreInstallStatus::UNKNOWN;
        availableVersionCode = 0;
    }

    UPROPERTY(BlueprintReadOnly)
    EURuStoreUpdateAvailability updateAvailability;

    UPROPERTY(BlueprintReadOnly)
    EURuStoreInstallStatus installStatus;

    UPROPERTY(BlueprintReadOnly)
    int64 availableVersionCode;
};

updateAvailability — update availability:
:
- UNKNOWN (uint8 = 0) — by default.;
- UPDATE_NOT_AVAILABLE (uint8 = 1) — no update required.;
- UPDATE_AVAILABLE (uint8 = 2) — update needs to be downloaded or it has already been downloaded to the user's device.;
- DEVELOPER_TRIGGERED_UPDATE_IN_PROGRESS (uint8 = 3) — update is already being downloaded or installation is already running..
installStatus— update installation status, if the user has already started the update installation at the time:
:
- UNKNOWN (uint8 = 0) — by default.;
- DOWNLOADED (uint8 = 1) — successfully downloaded.;
- DOWNLOADING (uint8 = 2) — currently being downloaded.;
- FAILED (uint8 = 3) — error.;
- PENDING (uint8 = 5) — awaiting update..
availableVersionCode — update version code.

info

The update download is only available if the updateAvailability field has the UPDATE_AVAILABLE value.

The Failure callback returns структуру with the error information. Error structure is described in Error Handling.

Download and install updates

Using listener

After the update's availability is confirmed, you can receive the update's download status in OnStateUpdatedInstanceEvent of the URuStoreAppUpdateManager object.

Событие OnStateUpdatedInstanceEvent
DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FRuStoreOnStateUpdatedInstanceDelegate, int64, listenerId, FURuStoreInstallState, state);

UPROPERTY(BlueprintAssignable, Category = "RuStore AppUpdate Manager")
FRuStoreOnStateUpdatedInstanceDelegate OnStateUpdatedInstanceEvent;

Подписка на событие слушателя
FScriptDelegate Delegate;
Delegate.BindUFunction(YourUObjectPtr, FName("YourCallbackMethod"));
URuStoreAppUpdateManager::Instance()->OnStateUpdatedInstanceEvent.Add(Delegate);

Пример метода обработчика обратного вызова
UFUNCTION()
void YourCallbackMethod(int64 listenerId, FURuStoreInstallState state) {
	// Process callback
}

Subscribe to a listener event from Blueprint:

The OnStateUpdatedInstanceEvent event returns a FURuStoreInstallState object in the state parameter describing the current download status. FURuStoreInstallState is described in Checking the update download status.

Listener interface

The URuStoreAppUpdateManager class implements a standard listener. You can create your own listener class using the IRuStoreInstallStateUpdateListenerInterface interface.

Интерфес IRuStoreInstallStateUpdateListenerInterface
UINTERFACE(Blueprintable)
class RUSTOREAPPUPDATE_API URuStoreInstallStateUpdateListenerInterface : public UInterface
{
	GENERATED_BODY()
};

class IRuStoreInstallStateUpdateListenerInterface
{
	GENERATED_BODY()

public:
	UFUNCTION(BlueprintCallable, BlueprintNativeEvent, Category = "RuStore InstallStateUpdate Listener Interface")
	void OnStateUpdated(int64 listenerId, FURuStoreInstallState& state);
};

The OnStateUpdated event returns a FURuStoreInstallState object in the state parameter describing the current download status. FURuStoreInstallState is described in Checking the update download status.

Calling the RegisterListener method performs registering the listener.

caution

For the default URuStoreAppUpdateManager listener, calling RegisterListener is not required.

Вызов метода RegisterListener
int64 listenerId = URuStoreAppUpdateManager::Instance()->RegisterListener(YourListenerPtr);

YourListenerPtr — object of a class that implements IRuStoreInstallStateUpdateListenerInterface.

Check update status

FURuStoreInstallState describes the current download status.

Структура FURuStoreInstallState
USTRUCT(BlueprintType)
struct RUSTOREAPPUPDATE_API FURuStoreInstallState
{
    GENERATED_USTRUCT_BODY()

    FURuStoreInstallState()
    {
        bytesDownloaded = 0;
        totalBytesToDownload = 0;
        percentDownloaded = 0;
        installStatus = EURuStoreInstallStatus::UNKNOWN;
        installErrorCode = EURuStoreInstallErrorCode::ERROR_UNKNOWN;
    }

    UPROPERTY(BlueprintReadWrite)
    int64 bytesDownloaded;

    UPROPERTY(BlueprintReadWrite)
    int64 totalBytesToDownload;

    UPROPERTY(BlueprintReadWrite)
    float percentDownloaded;

    UPROPERTY(BlueprintReadWrite)
    EURuStoreInstallStatus installStatus;

    UPROPERTY(BlueprintReadWrite)
    EURuStoreInstallErrorCode installErrorCode;
};

bytesDownloaded — number of bytes downloaded.
totalBytesToDownload — total number of bytes that need to be downloaded.;
percentDownloaded — update download progress in percent;
installStatus — update installation status, if the user has already started the update installation at the time:
- UNKNOWN (int == 0) — default status;
- DOWNLOADED (int == 1) — downloaded;
- DOWNLOADING (int == 2)— being downloaded;
- FAILED (int == 3) — error;
- PENDING (Int == 5) — waiting for download.
installErrorCode — error code during download. All possible errors are described in Error Handling.

Delete listener

If you no longer need a listener, use the UnregisterListener method to remove a listener, passing a previously registered listener to the method. UnregisterListener must be called for all listeners before the application terminates.

caution

For the default URuStoreAppUpdateManager listener, it is not necessary to call UnregisterListener on application shutdown.

Вызов метода UnregisterListener
bool bIsDone = URuStoreAppUpdateManager::Instance()->UnregisterListener(YourListenerPtr);

YourListenerPtr — object of a class that implements IRuStoreInstallStateUpdateListenerInterface.

If you implement your own listener, you can also unregister the default listener to save resources.

Вызов метода UnregisterListener
auto instance = URuStoreAppUpdateManager::Instance();
bool bIsDone = instance->UnregisterListener(instance);

Start downloading update

Delayed update

Running an upgrade script

Update with RuStore UI

To confirm the update, the user is presented with a RuStore UI dialogue.
When you click the Update button, a dialogue box will appear to confirm that the update has been installed.
If the update is successfully installed, the application will be closed.

Running an upgrade script

Use the StartUpdateFlow method to start downloading the application update.

info

The FURuStoreAppUpdateInfo object becomes invalid after a single use. To call the StartUpdateFlow method again, request FURuStoreAppUpdateInfo again using the GetAppUpdateInfo method.

See Checking for updates.

Each StartUpdateFlow request returns requestId, that is unique within a single application run. Each event returns requestId of the request that triggered the event.

Вызов метода StartUpdateFlow
EURuStoreAppUpdateOptions appUpdateOptions = EURuStoreAppUpdateOptions::DELAYED;
long requestId = StartUpdateFlow(
    appUpdateOptions,
    [](long requestId, EURuStoreUpdateFlowResult response) {
        // Process response
    },
    [](long requestId, TSharedPtr<FURuStoreError, ESPMode::ThreadSafe> error) {
        // Process error
    }
);

appUpdateOptions — update type:
- DELAYED — delayed update. To confirm the update, the user is presented with a RuStore UI dialogue.
- SILENT — silent update. The update will be downloaded in the background.
- IMMEDIATE — forced update. Until the update is installed, use of the application will be blocked.

TheSuccess callback returns EURuStoreUpdateFlowResult in the Response parameter:

EURuStoreUpdateFlowResult::RESULT_OK — user has confirmed the download.
EURuStoreUpdateFlowResult::RESULT_CANCELED — user refused to install the update.

The Failure callback returns the FURuStoreError structure with the error information in the Errorparameter. The structure of the FURuStoreError error is described in Error Handling.

After calling the StartUpdateFlow method you can monitor the download status in the OnStateUpdatedInstanceEvent event.

Once the EURuStoreInstallStatus::DOWNLOADED status is received in the installStatus field of FURuStoreInstallState, the update installation method can be called.

Forced update

Running an upgrade script

Update with RuStore UI

To confirm the update, the user is presented with a RuStore UI dialogue. Until the update is installed, use of the application will be blocked.
When you click the Update button, a dialogue box will appear to confirm that the update has been installed.
If you then click on the 'Install' button, a full-screen dialogue box will appear asking you to install the new app version.
Once the installation is complete, the application will restart.

caution

If the Rustore version is 1.37 or higher, the application will restart. If the version of Rustore is lower, the application will close to install the update. It will not reopen when the update is complete.

Running an upgrade script

Once you receive FURuStoreAppUpdateInfo, you can check if the forced update is available.

Вызов метода CheckIsImmediateUpdateAllowed
bool bIsAvailable = URuStoreAppUpdateManager::Instance()->CheckIsImmediateUpdateAllowed();

The result of CheckIsImmediateUpdateAllowed is recommended when deciding whether to run a forced update, but this result does not affect the ability to run the script. Your internal app logic determines the necessity to run the update script.

Use the StartUpdateFlow method to start downloading the application update.

info

The FURuStoreAppUpdateInfo object becomes invalid after a single use. To call the StartUpdateFlow method again, request FURuStoreAppUpdateInfo again using the GetAppUpdateInfo method.

See Checking for updates.

Each StartUpdateFlow request returns requestId, that is unique within a single application run. Each event returns requestId of the request that triggered the event.

Вызов метода StartUpdateFlow
EURuStoreAppUpdateOptions appUpdateOptions = EURuStoreAppUpdateOptions::IMMEDIATE;
long requestId = StartUpdateFlow(
    appUpdateOptions,
    [](long requestId, EURuStoreUpdateFlowResult response) {
        // Process response
    },
    [](long requestId, TSharedPtr<FURuStoreError, ESPMode::ThreadSafe> error) {
        // Process error
    }
);

appUpdateOptions — update type:
- DELAYED — delayed update. To confirm the update, the user is presented with a RuStore UI dialogue.
- SILENT — silent update. The update will be downloaded in the background.
- IMMEDIATE — forced update. Until the update is installed, use of the application will be blocked.

TheSuccess callback returns EURuStoreUpdateFlowResult in the Response parameter:

EURuStoreUpdateFlowResult::RESULT_OK (-1) — update completed, the code may not be received as the app terminates at the time of update.
EURuStoreUpdateFlowResult::RESULT_CANCELED — flow interrupted by the user or an error occurred. When you receive this code, you are expected to exit the app.
EURuStoreUpdateFlowResult::ACTIVITY_NOT_FOUND — RuStore not installed, or the installed version does not support immediate updates (RuStore versionCode < 191).

The Failure callback returns the FURuStoreError structure with the error information in the Errorparameter. The structure of the FURuStoreError error is described in Error Handling.

No further action is required if the update is successful.

Silent update

Silent Update Scenario Description

Update without RuStore UI

The user will be presented with a dialogue box to confirm the installation of the update (the update will be downloaded in the background).
If the update is successfully installed, the application will be closed.

Running an upgrade script

Use the StartUpdateFlow method to start downloading the application update.

info

The FURuStoreAppUpdateInfo object becomes invalid after a single use. To call the StartUpdateFlow method again, request FURuStoreAppUpdateInfo again using the GetAppUpdateInfo method.

See Checking for updates.

Each StartUpdateFlow request returns requestId, that is unique within a single application run. Each event returns requestId of the request that triggered the event.

Вызов метода StartUpdateFlow
EURuStoreAppUpdateOptions appUpdateOptions = EURuStoreAppUpdateOptions::SILENT;
long requestId = StartUpdateFlow(
    appUpdateOptions,
    [](long requestId, EURuStoreUpdateFlowResult response) {
        // Process response
    },
    [](long requestId, TSharedPtr<FURuStoreError, ESPMode::ThreadSafe> error) {
        // Process error
    }
);

appUpdateOptions — update type:
- DELAYED — delayed update. To confirm the update, the user is presented with a RuStore UI dialogue.
- SILENT — silent update. The update will be downloaded in the background.
- IMMEDIATE — forced update. Until the update is installed, use of the application will be blocked.

TheSuccess callback returns EURuStoreUpdateFlowResult in the Response parameter:

EURuStoreUpdateFlowResult::RESULT_OK — task to download the update has been registered.

The Failure callback returns the FURuStoreError structure with the error information in the Errorparameter. The structure of the FURuStoreError error is described in Error Handling.

After calling the StartUpdateFlow method you can monitor the download status in the OnStateUpdatedInstanceEvent event.

Once the EURuStoreInstallStatus::DOWNLOADED status is received in the installStatus field of FURuStoreInstallState, the update installation method can be called.

tip

Silent update requires a separate interface to operate.

Update installation

tip

It is advisable to notify the user that the update is prepared for installation at this point.

Use the CompleteUpdate method to start the update installation. The update is carried out through the native android tool. If the update is successfully installed, the application will be closed.

Вызов метода CompleteUpdate
requestId = CompleteUpdate(
    [](long requestId, TSharedPtr<FURuStoreError, ESPMode::ThreadSafe> error) {
        // Process error
    }
);

The Failure callback returns the FURuStoreError structure with the error information in the Errorparameter. The structure of the FURuStoreError error is described in Error Handling.

Errors processing

tip

It is not recommended to display the error to the user yourself if you get onFailure in response. It can negatively affect the user experience.

Структура FURuStoreError
USTRUCT(BlueprintType)
struct RUSTORECORE_API FURuStoreError
{
	GENERATED_USTRUCT_BODY()

	FURuStoreError()
	{
		name = "";
		description = "";
	}

	UPROPERTY(BlueprintReadOnly)
	FString name;

	UPROPERTY(BlueprintReadOnly)
	FString description;
};

name — simpleName.
description — error description.

Possible errors

RuStoreNotInstalledException — RuStore is not installed on the user's device;
RuStoreOutdatedException — RuStore version installed on the user's device does not support this SDK;
RuStoreUserUnauthorizedException — user is not authorized in RuStore;
RuStoreException — basic RuStore error from which other errors are inherited;
RuStoreInstallException(public val code: Int) — download and installation error.
- ERROR_UNKNOWN(Int = 4001) — unknown error.
- ERROR_DOWNLOAD(Int = 4002) — error while downloading.
- ERROR_BLOCKED(Int = 4003) — installation blocked by system.
- ERROR_INVALID_APK(Int = 4004) — invalid update APK.
- ERROR_CONFLICT(Int = 4005) — conflict with the current app version.
- ERROR_STORAGE(Int = 4006) — insufficient device storage.
- ERROR_INCOMPATIBLE(Int = 4007) — incompatible with device.
- ERROR_APP_NOT_OWNED(Int = 4008) — application not purchased.
- ERROR_INTERNAL_ERROR(Int = 4009) — internal error.
- ERROR_ABORTED(Int = 4010) — user refused to install the update.
- ERROR_APK_NOT_FOUND(Int = 4011) — APK for installation not found.
- ERROR_EXTERNAL_SOURCE_DENIED(Int = 4012) — update prohibited. For example, the first method responses that an update is not available, but the user calls the second method.
- ERROR_ACTIVITY_SEND_INTENT(Int = 9901) — error while sending intent for opening an activity.
- ERROR_ACTIVITY_UNKNOWN(Int = 9902) — unknown error on activity opening.

1.0.1

General​

Prerequisites​

Connecting to project​

Create update manager​

How to initialize a library​

Deinitialization​

Initialization check​

Check for updates​

Download and install updates​

Using listener​

Listener interface​

Check update status​

Delete listener​

Start downloading update​

Delayed update​

Forced update​

Silent update​

Update installation​

Errors processing​

Possible errors​

General

Prerequisites

Connecting to project

Create update manager

How to initialize a library

Deinitialization

Initialization check

Check for updates

Download and install updates

Using listener

Listener interface

Check update status

Delete listener

Start downloading update

Delayed update

Forced update

Silent update

Update installation

Errors processing

Possible errors