Game > Gamebase > Android Developer's Guide > Purchase

This page describes how to set In-App Purchase (IAP).

Gamebase provides an integrated purchase API to easily link IAP of many stores in a game.

Initialization

  • Store code must be specified to initialize Gamebase.
  • Select STORE_CODE among the following:
    • GG: Google Play
    • ONESTORE: ONE Store
    • GALAXY: Galaxy Store
    • AMAZON: Amazon Appstore
    • HUAWEI: Huawei AppGallery
String STORE_CODE = "GG";   // Google

GamebaseConfiguration configuration = GamebaseConfiguration.newBuilder(APP_ID, APP_VERSION, STORE_CODE)
        .build();

Gamebase.initialize(activity, configuration, callback);

Purchase Flow

Purchase of an item can be divided into Purchase Flow, Consume Flow, and Reprocess Flow. It is recommended to implement the Purchase Flow in the following order:

purchase flow

  1. If the previous purchase was not completed normally, the purchase will fail if the reprocessing is not performed. Therefore, call requestItemListOfNotConsumed before the purchase to run reprocessing, so that the Consume Flow is executed if there are any unprovided items.
  2. The game client attempts to make a purchase by calling requestPurchase of the Gamebase SDK.
  3. If the purchase is successful, call requestItemListOfNotConsumed to check the unconsumed purchase details, and if there is an item to provide, proceed with the Consume Flow.

Consume Flow

If there's a value on the list of unconsumed purchases, proceed with the Consume Flow in the following order:

[Caution]

To prevent duplicate provision of an item, always check whether the item is being provided in duplicate in the game server.

consume flow

  1. The game client makes a request to the game server to consume the purchase item.
    • Passes UserID, gamebaseProductId, paymentSeq, and purchaseToken.
  2. The game server checks the game DB to see if there is a history of already providing an item with the same paymentSeq.
    • 2-1. If the item has not been provided yet, call the Gamebase server's Payment Transaction API to verify that the paymentSeq and purchaseToken values are valid.
    • 2-2. If purchaseToken is a normal value, provide the item corresponding to gamebaseProductId to UserID.
    • 2-3. After providing the item, store UserID, gamebaseProductId, paymentSeq, and purchaseToken in the game DB to prevent duplicate provision or allow for re-provision.
  3. Regardless of whether the item has been provided, the game server completes the item provision by calling the Gamebase server's consume API.

Retry Transaction Flow

retry transaction flow

  • There are cases where the store purchase has been made successfully but the process was not properly completed due to errors.
  • Call requestItemListOfNotConsumed to run reprocessing and proceed with the Consume Flow for any unprovided items.
  • It is recommended to call reprocessing at the following times:
    • After login is completed
    • Before making a purchase
    • When entering the store (or lobby) in a game
    • When checking the user profile or mailbox

Purchase Items

Request purchase by calling the following API using the gamebaseProductId of the item to purchase.
The gamebaseProductId is generally the same as the ID of item registered at the store, but it can be changed in the Gamebase console. Additional information entered in the payload field is maintained at the PurchasableReceipt.payload field after a successful payment, so it can be used for many purposes.

[Caution]

The AMAZON store does not support the payload field.

When a game user cancels purchase, the GamebaseError.PURCHASE_USER_CANCELED error is returned. Please process cancellation.

API

+ (void)Gamebase.Purchase.requestPurchase(@NonNull final Activity activity,
                                          @NonNull final String gamebaseProductId,
                                          @NonNull final GamebaseDataCallback<PurchasableReceipt> callback);
+ (void)Gamebase.Purchase.requestPurchase(@NonNull final Activity activity,
                                          @NonNull final String gamebaseProductId,
                                          @NonNull final String payload,
                                          @NonNull final GamebaseDataCallback<PurchasableReceipt> callback);

Example

String userPayload = "{\"description\":\"This is example\",\"channelId\":\"delta\",\"characterId\":\"abc\"}";
Gamebase.Purchase.requestPurchase(activity, gamebaseProductId, userPayload, new GamebaseDataCallback<PurchasableReceipt>() {
    @Override
    public void onCallback(PurchasableReceipt receipt, GamebaseException exception) {
        if (Gamebase.isSuccess(exception)) {
            // Succeeded.
        } else if(exception.getCode() == GamebaseError.PURCHASE_USER_CANCELED) {
            // User canceled.
        } else {
            // To Purchase Item Failed cause of the error
        }
    }
});

VO

class PurchasableReceipt {
    // The product ID of a purchased item.
    @Nullable
    String gamebaseProductId;

    // It is the value passed to payload when calling Gamebase.Purchase.requestPurchase API.
    //
    // It is the value passed to payload when calling Gamebase.Purchase.requestPurchase API.
    // This field can be used to hold a variety of additional information.
    // For example, this field can be used to separately handle purchase and provision
    // of the products purchased using the same user ID and sort them by game channel or character.
    @Nullable
    String payload;

    // Price of purchased product.
    float price;

    // Currency code.
    @NonNull
    String currency;

    // Payment identifier.
    // This is an important piece of information used to call 'Consume' Server API with purchaseToken.
    //
    // Consume API : https://docs.toast.com/en/Game/Gamebase/en/api-guide/#purchase-iap
    // Caution: Call Consume API from game server!
    @NonNull
    String paymentSeq;

    // Payment identifier.
    // This is an important piece of information used to call 'Consume' server API with paymentSeq.
    // In Consume API, the parameter must be named 'accessToken' to be passed.
    //
    // Consume API : https://docs.toast.com/en/Game/Gamebase/en/api-guide/#purchase-iap
    // In Consume API, the parameter must be named 'accessToken' to be passed.
    @Nullable
    String purchaseToken;

    // This product ID is registered to the console of stores such as Google and Apple.
    @NonNull
    String marketItemId;

    // This is a product type that can have the following values:
    // * UNKNOWN : An unknown type. Either update Gamebase SDK or contact Gamebase Customer Center.
    // * CONSUMABLE : A consumable product.
    // * AUTO_RENEWABLE : A subscription product.
    // * CONSUMABLE_AUTO_RENEWABLE : This 'consumable subscription product' is used when providing a subscribed user a subscription product that can be consumed periodically.
    @NonNull
    String productType;

    // This is a user ID with which a product is purchased.
    // If a user logs in with a user ID that is not used to purchase a product, the user cannot obtain the product they purchased.
    @NonNull
    String userId;

    // The payment identifier of a store.
    @Nullable
    String paymentId;

    // The time when the product was purchased.(epoch time)
    long purchaseTime;

    // The time when the subscription expires.(epoch time)
    long expiryTime;

    // This value is used when making a purchase on Google, which can have the following values.
    // However, if the verification logic is temporarily disabled by Gamebase payment server due to error on Google server,
    // it returns only null, so please remember that it does not guarantee a valid return value at all times.
    // * null : Normal payment
    // * Test : Test payment
    // * Promo : Promotion payment
    @Nullable
    String purchaseType;

    // paymentId is changed whenever product subscription is renewed.
    // This field shows the paymentId that was used when a subscription product was first purchased.
    // This value does not guarantee to be always valid, as it can have no value
    // depending on the store from which the user made a purchase and the status of the payment server.
    @Nullable
    String originalPaymentId;

    // An identifier for Legacy API that purchases products with itemSeq.
    long itemSeq;
}

Response Example

{
    "gamebaseProductId": "my_product_001",
    "payload": "UserPayload:!@#...",
    "price": 1000.0,
    "currency": "KRW",
    "paymentSeq": "2021032510000001",
    "purchaseToken": "5U_NVCLKSDFKLJJ...",
    "marketItemId": "my_product_001",
    "productType": "CONSUMABLE",
    "userId": "AS@123456ABCDEFGHIJ",
    "paymentId": "GPA.1111-2222-3333-44444",
    "purchaseTime": 1616649225531,
    "expiryTime": 0,
    "itemSeq": 1000001
}
{
    "gamebaseProductId": "my_subcription_product_001",
    "payload": "MyData:{\"1234\":\"5678\"}",
    "price": 1000.0,
    "currency": "KRW",
    "paymentSeq": "2021032510000001",
    "purchaseToken": "5U_NVCLKKLJLSDG...",
    "marketItemId": "my_subcription_product_001",
    "productType": "CONSUMABLE_AUTO_RENEWABLE",
    "userId": "AS@123456ABCDEFGHIJ",
    "paymentId": "GPA.1111-2222-3333-56789",
    "purchaseTime": 1617069916128,
    "expiryTime": 1617070323784,
    "purchaseType": "Test",
    "originalPaymentId": "GPA.1111-2222-3333-56789",
    "itemSeq": 1000002
}

List Purchasable Items

To retrieve the list of items, call the following API. Information of each item is included in the array of callback return.

API

+ (void)Gamebase.Purchase.requestItemListPurchasable(Activity activity, GamebaseDataCallback<List<PurchasableItem>> callback);

Example

Gamebase.Purchase.requestItemListPurchasable(activity, new GamebaseDataCallback<List<PurchasableItem>>() {
    @Override
    public void onCallback(List<PurchasableItem> data, GamebaseException exception) {
        if (Gamebase.isSuccess(exception)) {
            // Succeeded.
        } else {
            // Failed.
            Log.e(TAG, "Request item list failed- "
                    + "errorCode: " + exception.getCode()
                    + "errorMessage: " + exception.getMessage());
        }
    }
});

VO

class PurchasableItem {
    // The product ID that is registered with the Gamebase console.
    // This is used when a product is purchased using Gamebase.Purchase.requestPurchase API.
    @Nullable
    String gamebaseProductId;

    // Product price.
    float price;

    // Currency code.
    @Nullable
    String currency;

    // The name of a product registered with the Gamebase console.
    @Nullable
    String itemName;

    // This product ID is registered to the console of stores such as Google and Apple.
    @NonNull
    String marketItemId;

    // This is a product type that can have the following values:
    // * UNKNOWN : An unknown type. Either update Gamebase SDK or contact Gamebase Customer Center.
    // * CONSUMABLE : A consumable product.
    // * AUTORENEWABLE : A subscription product.
    // * CONSUMABLE_AUTO_RENEWABLE : This 'consumable subscription product' is used when providing a subscribed user a subscription product that can be consumed periodically.
    @NonNull
    String productType;

    // Localized price information with currency symbol.
    @Nullable
    String localizedPrice;

    // The name of a localized product registered with the store console.
    @Nullable
    String localizedTitle;

    // The description of a localized product registered with the store console.
    @Nullable
    String localizedDescription;

    // Shows whether the product is 'used or not' in the Gamebase console.
    boolean isActive;

    // An identifier for Legacy API that purchases products with itemSeq.
    long itemSeq;
}

Response Example

{
    "gamebaseProductId": "my_product_001",
    "price": 1000.0,
    "currency": "KRW",
    "itemName": "Consumable product for test",
    "marketItemId": "my_product_001",
    "productType": "CONSUMABLE",
    "localizedPrice": "₩1,000",
    "localizedTitle": "TEST PRODUCT 001",
    "localizedDescription": "Product for test 001",
    "isActive": true,
    "itemSeq": 1000001
}

List Non-Consumed Items

  • List non-consumed consumables (CONSUMABLE) and consumable subscriptions (CONSUMABLE_AUTO_RENEWABLE).
  • In case there is any non-purchased item, request the game server (item server) to proceed with item delivery (provision).
  • If the purchase is not completed normally, this API also serves the reprocessing function, so call it in the following situations:
    • Check if there's any unprovided items for a game user
      • After login is completed
      • When entering the store (or lobby) of a game
      • When checking the user profile or mailbox
    • Check if there's any item in need of reprocessing
      • Before making a purchase
      • After a purchase fails

API

+ (void)Gamebase.Purchase.requestItemListOfNotConsumed(Activity activity, GamebaseDataCallback<List<PurchasableReceipt>> callback);

Example

Gamebase.Purchase.requestItemListOfNotConsumed(activity, new GamebaseDataCallback<List<PurchasableReceipt>>() {
    @Override
    public void onCallback(List<PurchasableReceipt> data, GamebaseException exception) {
        if (Gamebase.isSuccess(exception)) {
            // Succeeded.
        } else {
            // Failed.
            Log.e(TAG, "Request item list failed- "
                    + "errorCode: " + exception.getCode()
                    + "errorMessage: " + exception.getMessage());
        }
    }
});

List Activated Subscriptions

List activated subscriptions for a current user ID. Paid subscriptions (auto-renewable subscription, or auto-renewed consumable subscription) can be queried before they're expired. Under a same user ID, both subscriptions for Android and iOS can be listed.

[Caution]

Current subscriptions for Android are supported by Google Play Store only.

API

+ (void)Gamebase.Purchase.requestActivatedPurchases(Activity activity, GamebaseDataCallback<List<PurchasableReceipt>> callback);

Example

Gamebase.Purchase.requestActivatedPurchases(activity, new GamebaseDataCallback<List<PurchasableReceipt>>() {
    @Override
    public void onCallback(List<PurchasableReceipt> data, GamebaseException exception) {
        if (Gamebase.isSuccess(exception)) {
            // Succeeded.
        } else {
            // Failed.
            Log.e(TAG, "Request subscription list failed- "
                    + "errorCode: " + exception.getCode()
                    + "errorMessage: " + exception.getMessage());
        }
    }
});

Promotional Events

When a promotional purchase is completed, get an event from GamebaseEventHandler to be processed.
See the guide on how to process a promotional purchase event via GamebaseEventHandler. Game > Gamebase > User Guide for Android SDK > ETC > Gamebase Event Handler

Error Handling

Error Error Code Description
PURCHASE_NOT_INITIALIZED 4001 The purchase module has not been initialized.
Check if the gamebase-adapter-purchase-IAP module has been added to the project.
PURCHASE_USER_CANCELED 4002 Purchase has been cancelled.
PURCHASE_NOT_FINISHED_PREVIOUS_PURCHASING 4003 API has been called when a purchase logic is not completed.
PURCHASE_INACTIVE_PRODUCT_ID 4005 Product is not activated.
PURCHASE_NOT_EXIST_PRODUCT_ID 4006 Requested for purchase with invalid GamebaseProductID.
PURCHASE_LIMIT_EXCEEDED 4007 You have exceeded your monthly purchase limit.
PURCHASE_NOT_SUPPORTED_MARKET 4010 The store is not supported.
You can choose either GG (Google), ONESTORE, GALAXY, AMAZON, or HUAWEI.
PURCHASE_EXTERNAL_LIBRARY_ERROR 4201 Error in IAP library.
Check DetailCode.
PURCHASE_UNKNOWN_ERROR 4999 Unknown error in purchase.
Please upload the entire logs to Customer Center and we'll reply at the earliest possible moment.

PURCHASE_EXTERNAL_LIBRARY_ERROR

  • Occurs at an NHN Cloud IAP SDK.
  • Check the error code as below.
Gamebase.Purchase.requestPurchase(activity, gamebaseProductId, new GamebaseDataCallback<PurchasableReceipt>() {
    @Override
    public void onCallback(PurchasableReceipt data, GamebaseException exception) {
        if (Gamebase.isSuccess(exception)) {
            Log.d(TAG, "Purchase successful");
            ...
        } else {
            Log.e(TAG, "Purchase failed");

            // Gamebase Error Info
            int errorCode = exception.getCode();
            String errorMessage = exception.getMessage();

            if (errorCode == GamebaseError.PURCHASE_EXTERNAL_LIBRARY_ERROR) {
                // IAP Error Info
                int moduleErrorCode = exception.getDetailCode();
                String moduleErrorMessage = exception.getDetailMessage();

                ...
            }
        }
    }
});
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