API Reference of GS2-Inventory SDK for Game Engine

Specifications of models and API references for GS2-SDK for Game Engine

Model

EzInventoryModel

Inventory Model

Inventory is like a bag that stores items owned by game players. Inventory can have a set capacity and cannot be owned beyond its capacity.

	Type	Required	Value Limits	Description
name	string	✓	~ 128 chars	Inventory Model Name
metadata	string		~ 2048 chars	Metadata
initialCapacity	int	✓	0 ~ 2147483646	Initial Capacity
maxCapacity	int	✓	0 ~ 2147483646	Maximum Capacity

EzItemModel

Item Model

Items can be held in groups within a single inventory slot, such as Potion ×99. This grouping of multiple items into one slot is called “stacking,” and a maximum stack size can be set for each item.

The behavior when the stack limit is reached can also be set for each item. Specifically, you can choose one of the following:

Add a new inventory slot to allow further acquisition
Prevent further acquisition once the limit is reached

	Type	Required	Value Limits	Description
name	string	✓	~ 128 chars	Item Model Name
metadata	string		~ 2048 chars	Metadata GS2-Enhance features a mechanism that works in conjunction with GS2-Inventory to perform enhancements. It sets the experience value when used as enhancement material in JSON format within the ItemModel metadata. Details are explained in the Microservices Introduction / GS2-Enhance section.
stackingLimit	long	✓	1 ~ 9223372036854775805	Maximum stackable quantity
allowMultipleStacks	bool	✓		Allow items to be stored in multiple slots when the maximum stackable quantity is exceeded
sortValue	int	✓	0 ~ 2147483646	Display order

EzInventory

Inventory

Inventory is like a bag that stores items owned by game players. The bag has a capacity, and the capacity can be expanded by each player.

	Type	Required	Default	Value Limits	Description
inventoryId	string	✓		~ 1024 chars	Inventory GRN
inventoryName	string	✓		~ 128 chars	Inventory Model Name
currentInventoryCapacityUsage	int	✓	0	0 ~ 2147483646	Capacity usage
currentInventoryMaxCapacity	int	✓		1 ~ 2147483646	Maximum capacity

EzItemSet

Item Set

Item set represents the possessions stored in the game player’s inventory. Item set has an item model and the quantity possessed.

	Type	Required	Default	Value Limits	Description
itemSetId	string	✓		~ 1024 chars	Quantity of items held per expiration date GRN
name	string	✓	UUID	~ 36 chars	Name identifying the item set Maintains a unique name for each item set. Names are automatically generated in UUID (Universally Unique Identifier) format and used to identify each item set.
inventoryName	string	✓		~ 128 chars	Inventory Model Name
itemName	string	✓		~ 128 chars	Item Model Name
count	long	✓		1 ~ 9223372036854775805	Quantity in possession
sortValue	int	✓		0 ~ 2147483646	Display order
expiresAt	long	✓	0		Effective date
referenceOf	List<string>		[]	0 ~ 24 items	List of references for this possession

EzSimpleInventoryModel

Simple Inventory Model

In a normal InventoryModel, you could limit the amount of items that could be stored in your inventory. Simple Inventory, however, has no such functionality and simply stores the number of items in the inventory.

However, the Simple Inventory provides an API that can increase or decrease the number of items in a single process.

	Type	Condition	Required	Default	Value Limits	Description
name	string		✓		~ 128 chars	Simple Inventory Model Name
metadata	string				~ 2048 chars	Metadata

EzSimpleItemModel

Simple ItemModel

ItemModel allowed setting a maximum stackable quantity, enabling implementation where items exceeding a certain number could be split into multiple stacks. SimpleItem does not have such a function and simply stores the number of items in the possession of the item.

	Type	Condition	Required	Default	Value Limits	Description
name	string		✓		~ 128 chars	Simple Item Model Name
metadata	string				~ 2048 chars	Metadata

EzSimpleItem

Simple Item

Simple Item represents a possession stored in the game player’s inventory. Simple Item has a model name and the quantity possessed.

	Type	Required	Value Limits	Description
itemId	string	✓	~ 1024 chars	Quantity of items GRN
itemName	string	✓	~ 128 chars	Simple Item Model Name
count	long	✓	0 ~ 9223372036854775805	Quantity in possession

EzBigInventoryModel

Big Inventory model

In the normal InventoryModel and SimpleInventoryModel, the number of items that can be stored in the inventory is limited to the range of 64bit integer values. In inflationary games, you may need a wider range of values.

In the Big Inventory Model, the number of items that can be stored in the inventory can have an integer value of 1024 digits.

	Type	Condition	Required	Default	Value Limits	Description
name	string		✓		~ 128 chars	Big Inventory Model Name
metadata	string				~ 2048 chars	Metadata

EzBigItemModel

Big ItemModel

	Type	Condition	Required	Default	Value Limits	Description
name	string		✓		~ 128 chars	Big Item Model Name
metadata	string				~ 2048 chars	Metadata

EzBigItem

Big item

Big item represent possessions stored in the game player’s huge inventory. Big item model name and the quantity of possessions can be held beyond the int64 range.

	Type	Required	Value Limits	Description
itemId	string	✓	~ 1024 chars	Quantity of items GRN
itemName	string	✓	~ 128 chars	Big Item Model Name
count	string BigInteger (Unity)	✓	~ 1024 chars	Quantity in possession

EzBigInventoryModel

Big Inventory model

In the Big Inventory Model, the number of items that can be stored in the inventory can have an integer value of 1024 digits.

	Type	Condition	Required	Default	Value Limits	Description
name	string		✓		~ 128 chars	Big Inventory Model Name
metadata	string				~ 2048 chars	Metadata

EzBigItemModel

Big ItemModel

	Type	Condition	Required	Default	Value Limits	Description
name	string		✓		~ 128 chars	Big Item Model Name
metadata	string				~ 2048 chars	Metadata

EzBigItem

Big item

Big item represent possessions stored in the game player’s huge inventory. Big item model name and the quantity of possessions can be held beyond the int64 range.

	Type	Required	Value Limits	Description
itemId	string	✓	~ 1024 chars	Quantity of items GRN
itemName	string	✓	~ 128 chars	Big Item Model Name
count	string BigInteger (Unity)	✓	~ 1024 chars	Quantity in possession

EzConsumeCount

Consumption quantity of simple items

	Type	Condition	Required	Default	Value Limits	Description
itemName	string		✓		~ 128 chars	Simple Item Model Name
count	long		✓		1 ~ 9223372036854775805	Quantity to be consumed

EzAcquireCount

Quantity of simple items obtained

	Type	Condition	Required	Default	Value Limits	Description
itemName	string		✓		~ 128 chars	Simple Item Model Name
count	long		✓		1 ~ 9223372036854775805	Quantity to be obtained

Methods

getInventoryModel

Get inventory model by specifying inventory name

Request

	Type	Condition	Required	Default	Value Limits	Description
namespaceName	string		✓		~ 128 chars	Namespace name
inventoryName	string		✓		~ 128 chars	Inventory Model Name

Result

	Type	Description
item	EzInventoryModel	Inventory Model

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).InventoryModel(
        inventoryName: "item"
    );
    var item = await domain.ModelAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).InventoryModel(
        inventoryName: "item"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->InventoryModel(
        "item" // inventoryName
    );
    const auto Future = Domain->Model();
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        return false;
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).InventoryModel(
        inventoryName: "item"
    );
    
    // Start event handling
    var callbackId = domain.Subscribe(
        value => {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    domain.Unsubscribe(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).InventoryModel(
        inventoryName: "item"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->InventoryModel(
        "item" // inventoryName
    );
    
    // Start event handling
    const auto CallbackId = Domain->Subscribe(
        [](TSharedPtr<Gs2::Inventory::Model::FInventoryModel> value) {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    Domain->Unsubscribe(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

The local cache will only be changed by executing the SDK’s API, or by executing a stamp sheet via GS2-Distributor with GS2-Gateway notification enabled, or by executing a GS2-JobQueue with GS2-Gateway notification enabled. GS2-Gateway notification enabled.

Therefore, callbacks will not be invoked if the value is changed in any other way.

listInventoryModels

Get list of inventory models

Request

	Type	Condition	Required	Default	Value Limits	Description
namespaceName	string		✓		~ 128 chars	Namespace name

Result

	Type	Description
items	List<EzInventoryModel>	List of Inventory Models

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    );
    var items = await domain.InventoryModelsAsync(
    ).ToListAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    );
    var it = domain.InventoryModels(
    );
    List<EzInventoryModel> items = new List<EzInventoryModel>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    );
    const auto It = Domain->InventoryModels(
    );
    TArray<Gs2::UE5::Inventory::Model::FEzInventoryModelPtr> Result;
    for (auto Item : *It)
    {
        if (Item.IsError())
        {
            return false;
        }
        Result.Add(Item.Current());
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    );
    
    // Start event handling
    var callbackId = domain.SubscribeInventoryModels(
        () => {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    domain.UnsubscribeInventoryModels(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    );
    var it = domain.InventoryModels(
    );
    List<EzInventoryModel> items = new List<EzInventoryModel>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    );
    
    // Start event handling
    const auto CallbackId = Domain->SubscribeInventoryModels(
        []() {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    Domain->UnsubscribeInventoryModels(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

getItemModel

Get item model by specifying inventory name and item name

Request

	Type	Required	Value Limits	Description
namespaceName	string	✓	~ 128 chars	Namespace name
inventoryName	string	✓	~ 128 chars	Inventory Model Name
itemName	string	✓	~ 128 chars	Item Model Name

Result

	Type	Description
item	EzItemModel

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).InventoryModel(
        inventoryName: "item"
    ).ItemModel(
        itemName: "item-master-0001"
    );
    var item = await domain.ModelAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).InventoryModel(
        inventoryName: "item"
    ).ItemModel(
        itemName: "item-master-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->InventoryModel(
        "item" // inventoryName
    )->ItemModel(
        "item-master-0001" // itemName
    );
    const auto Future = Domain->Model();
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        return false;
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).InventoryModel(
        inventoryName: "item"
    ).ItemModel(
        itemName: "item-master-0001"
    );
    
    // Start event handling
    var callbackId = domain.Subscribe(
        value => {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    domain.Unsubscribe(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).InventoryModel(
        inventoryName: "item"
    ).ItemModel(
        itemName: "item-master-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->InventoryModel(
        "item" // inventoryName
    )->ItemModel(
        "item-master-0001" // itemName
    );
    
    // Start event handling
    const auto CallbackId = Domain->Subscribe(
        [](TSharedPtr<Gs2::Inventory::Model::FItemModel> value) {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    Domain->Unsubscribe(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

listItemModels

Get list of item models by specifying the inventory name

Request

	Type	Condition	Required	Default	Value Limits	Description
namespaceName	string		✓		~ 128 chars	Namespace name
inventoryName	string		✓		~ 128 chars	Inventory Model Name

Result

	Type	Description
items	List<EzItemModel>	List of Item Model

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).InventoryModel(
        inventoryName: "item"
    );
    var items = await domain.ItemModelsAsync(
    ).ToListAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).InventoryModel(
        inventoryName: "item"
    );
    var it = domain.ItemModels(
    );
    List<EzItemModel> items = new List<EzItemModel>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->InventoryModel(
        "item" // inventoryName
    );
    const auto It = Domain->ItemModels(
    );
    TArray<Gs2::UE5::Inventory::Model::FEzItemModelPtr> Result;
    for (auto Item : *It)
    {
        if (Item.IsError())
        {
            return false;
        }
        Result.Add(Item.Current());
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).InventoryModel(
        inventoryName: "item"
    );
    
    // Start event handling
    var callbackId = domain.SubscribeItemModels(
        () => {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    domain.UnsubscribeItemModels(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).InventoryModel(
        inventoryName: "item"
    );
    var it = domain.ItemModels(
    );
    List<EzItemModel> items = new List<EzItemModel>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->InventoryModel(
        "item" // inventoryName
    );
    
    // Start event handling
    const auto CallbackId = Domain->SubscribeItemModels(
        []() {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    Domain->UnsubscribeItemModels(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

getInventory

Get inventory information by specifying the inventory name

Request

	Type	Required	Value Limits	Description
namespaceName	string	✓	~ 128 chars	Namespace name
inventoryName	string	✓	~ 128 chars	Inventory Model Name
accessToken	string	✓	~ 128 chars	Access token

Result

	Type	Description
item	EzInventory	Inventory

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "inventory-0001"
    );
    var item = await domain.ModelAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "inventory-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->Inventory(
        "inventory-0001" // inventoryName
    );
    const auto Future = Domain->Model();
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        return false;
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "inventory-0001"
    );
    
    // Start event handling
    var callbackId = domain.Subscribe(
        value => {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    domain.Unsubscribe(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "inventory-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->Inventory(
        "inventory-0001" // inventoryName
    );
    
    // Start event handling
    const auto CallbackId = Domain->Subscribe(
        [](TSharedPtr<Gs2::Inventory::Model::FInventory> value) {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    Domain->Unsubscribe(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

listInventories

Get Inventory List

Retrieves list of the inventory associated with a game player.

Request

	Type	Required	Default	Value Limits	Description
namespaceName	string	✓		~ 128 chars	Namespace name
accessToken	string	✓		~ 128 chars	Access token
pageToken	string			~ 1024 chars	Token specifying the position from which to start acquiring data
limit	int	✓	30	1 ~ 1000	Number of data acquired

Result

	Type	Description
items	List<EzInventory>	List of Inventories
nextPageToken	string	Page token to retrieve the rest of the listing

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    );
    var items = await domain.InventoriesAsync(
    ).ToListAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    );
    var it = domain.Inventories(
    );
    List<EzInventory> items = new List<EzInventory>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    );
    const auto It = Domain->Inventories(
    );
    TArray<Gs2::UE5::Inventory::Model::FEzInventoryPtr> Result;
    for (auto Item : *It)
    {
        if (Item.IsError())
        {
            return false;
        }
        Result.Add(Item.Current());
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    );
    
    // Start event handling
    var callbackId = domain.SubscribeInventories(
        () => {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    domain.UnsubscribeInventories(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    );
    var it = domain.Inventories(
    );
    List<EzInventory> items = new List<EzInventory>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    );
    
    // Start event handling
    const auto CallbackId = Domain->SubscribeInventories(
        []() {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    Domain->UnsubscribeInventories(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

consume

Consume Item

Use this if you wish to consume items from within the game.

This API is not used to increase or decrease items in conjunction with the GS2 system. This is because if the consideration is needed to purchase an item or to participate in a quest, you can set the consideration on GS2-Showcase or GS2-Quest, and then use the This is because items and other resources are automatically consumed as compensation when purchasing products or participating in quests.

Therefore, this API should be used when items are consumed for elements that do not involve GS2.

Request

	Type	Required	Value Limits	Description
namespaceName	string	✓	~ 128 chars	Namespace name
inventoryName	string	✓	~ 128 chars	Inventory Model Name
itemName	string	✓	~ 128 chars	Item Model Name
accessToken	string	✓	~ 128 chars	Access token
consumeCount	long	✓	1 ~ 9223372036854775805	Amount to consume
itemSetName	string		~ 36 chars	Name identifying the item set

Result

	Type	Description
items	List<EzItemSet>	List of item possession quantities per post-consumption expiration date
itemModel	EzItemModel	Item Model
inventory	EzInventory	Inventory

Error

Special exceptions are defined in this API. GS2-SDK for GameEngine provides specialized exceptions derived from general exceptions to facilitate handling of errors that may need to be handled in games. Please refer to the documentation here for more information on common error types and handling methods.

Type	Base Type	Description
ConflictException	ConflictException	Item manipulation process conflicted. Retry required.
InsufficientException	BadRequestException	Insufficient quantity of items in your possession.

Implementation Example

try {
    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "inventory-0001"
    ).ItemSet(
        itemName: "item-0001",
        itemSetName: null
    );
    var result = await domain.ConsumeAsync(
        consumeCount: 1L
    );
    var item = await result.ModelAsync();
} catch(Gs2.Gs2Inventory.Exception.Conflict e) {
    // Item manipulation process conflicted. Retry required.
} catch(Gs2.Gs2Inventory.Exception.Insufficient e) {
    // Insufficient quantity of items in your possession.
}

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "inventory-0001"
    ).ItemSet(
        itemName: "item-0001",
        itemSetName: null
    );
    var future = domain.ConsumeFuture(
        consumeCount: 1L
    );
    yield return future;
    if (future.Error != null)
    {
        if (future.Error is Gs2.Gs2Inventory.Exception.ConflictException)
        {
            // Item manipulation process conflicted. Retry required.
        }
        if (future.Error is Gs2.Gs2Inventory.Exception.InsufficientException)
        {
            // Insufficient quantity of items in your possession.
        }
        onError.Invoke(future.Error, null);
        yield break;
    }
    var future2 = future.Result.ModelFuture();
    yield return future2;
    if (future2.Error != null)
    {
        onError.Invoke(future2.Error, null);
        yield break;
    }
    var result = future2.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->Inventory(
        "inventory-0001" // inventoryName
    )->ItemSet(
        "item-0001", // itemName
        nullptr // itemSetName
    );
    const auto Future = Domain->Consume(
        1L // consumeCount
    );
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        auto e = Future->GetTask().Error();
        if (e->IsChildOf(Gs2::Inventory::Error::FConflictError::Class))
        {
            // Item manipulation process conflicted. Retry required.
        }
        if (e->IsChildOf(Gs2::Inventory::Error::FInsufficientError::Class))
        {
            // Insufficient quantity of items in your possession.
        }
        return false;
    }

    // obtain changed values / result values
    const auto Future2 = Future->GetTask().Result()->Model();
    Future2->StartSynchronousTask();
    if (Future2->GetTask().IsError())
    {
        return Future2->GetTask().Error();
    }
    const auto Result = Future2->GetTask().Result();

getItem

Retrieve items by specifying the inventory name and item name

Items may be divided into multiple stacks and responded to. Also, items with different expiration dates will always be in different stacks.

Request

	Type	Required	Value Limits	Description
namespaceName	string	✓	~ 128 chars	Namespace name
inventoryName	string	✓	~ 128 chars	Inventory Model Name
itemName	string	✓	~ 128 chars	Item Model Name
accessToken	string	✓	~ 128 chars	Access token

Result

	Type	Description
items	List<EzItemSet>	List of Quantity of items held per expiration date
itemModel	EzItemModel	Item Model
inventory	EzInventory	inventory

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "item"
    ).ItemSet(
        itemName: "item-0001",
        itemSetName: "itemSet-0001"
    );
    var item = await domain.ModelAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "item"
    ).ItemSet(
        itemName: "item-0001",
        itemSetName: "itemSet-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->Inventory(
        "item" // inventoryName
    )->ItemSet(
        "item-0001", // itemName
        "itemSet-0001" // itemSetName
    );
    const auto Future = Domain->Model();
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        return false;
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "item"
    ).ItemSet(
        itemName: "item-0001",
        itemSetName: "itemSet-0001"
    );
    
    // Start event handling
    var callbackId = domain.Subscribe(
        value => {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    domain.Unsubscribe(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "item"
    ).ItemSet(
        itemName: "item-0001",
        itemSetName: "itemSet-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->Inventory(
        "item" // inventoryName
    )->ItemSet(
        "item-0001", // itemName
        "itemSet-0001" // itemSetName
    );
    
    // Start event handling
    const auto CallbackId = Domain->Subscribe(
        [](TSharedPtr<Gs2::Inventory::Model::FItemSet> value) {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    Domain->Unsubscribe(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

getItemWithSignature

Retrieve signed items by specifying the inventory name and item name

This API allows you to prove that you own the item at the moment you call the API

Request

	Type	Required	Default	Value Limits	Description
namespaceName	string	✓		~ 128 chars	Namespace name
inventoryName	string	✓		~ 128 chars	Inventory Model Name
itemName	string	✓		~ 128 chars	Item Model Name
accessToken	string	✓		~ 128 chars	Access token
itemSetName	string			~ 36 chars	Name identifying the item set
keyId	string	✓	“grn:gs2:{region}:{ownerId}:key:default:key:default”	~ 1024 chars	encryption key GRN

Result

	Type	Description
items	List<EzItemSet>	List of Quantity of items held per expiration date
itemModel	EzItemModel	Item Model
inventory	EzInventory	Inventory
body	string	Item Set Information for Signature Subject
signature	string	Signature

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "inventory-0001"
    ).ItemSet(
        itemName: "item-0001",
        itemSetName: null
    );
    var result = await domain.GetItemWithSignatureAsync(
        keyId: "key-0001"
    );
    var item = await result.ModelAsync();
    var body = result.Body;
    var signature = result.Signature;

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "inventory-0001"
    ).ItemSet(
        itemName: "item-0001",
        itemSetName: null
    );
    var future = domain.GetItemWithSignatureFuture(
        keyId: "key-0001"
    );
    yield return future;
    if (future.Error != null)
    {
        onError.Invoke(future.Error, null);
        yield break;
    }
    var future2 = future.Result.ModelFuture();
    yield return future2;
    if (future2.Error != null)
    {
        onError.Invoke(future2.Error, null);
        yield break;
    }
    var result = future2.Result;
    var body = future.Result.Body;
    var signature = future.Result.Signature;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->Inventory(
        "inventory-0001" // inventoryName
    )->ItemSet(
        "item-0001", // itemName
        nullptr // itemSetName
    );
    const auto Future = Domain->GetItemWithSignature(
        "key-0001" // keyId
    );
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        return false;
    }

    // obtain changed values / result values
    const auto Future2 = Future->GetTask().Result()->Model();
    Future2->StartSynchronousTask();
    if (Future2->GetTask().IsError())
    {
        return Future2->GetTask().Error();
    }
    const auto Result = Future2->GetTask().Result();
    const auto Body = Result->Body;
    const auto Signature = Result->Signature;

listItems

Retrieves list of items owned in the specified inventory

Request

	Type	Required	Default	Value Limits	Description
namespaceName	string	✓		~ 128 chars	Namespace name
inventoryName	string	✓		~ 128 chars	Inventory Model Name
accessToken	string	✓		~ 128 chars	Access token
pageToken	string			~ 1024 chars	Token specifying the position from which to start acquiring data
limit	int	✓	30	1 ~ 1000	Number of data acquired

Result

	Type	Description
items	List<EzItemSet>	List of Quantity of items held per expiration date
nextPageToken	string	Page token to retrieve the rest of the listing

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "item"
    );
    var items = await domain.ItemSetsAsync(
    ).ToListAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "item"
    );
    var it = domain.ItemSets(
    );
    List<EzItemSet> items = new List<EzItemSet>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->Inventory(
        "item" // inventoryName
    );
    const auto It = Domain->ItemSets(
    );
    TArray<Gs2::UE5::Inventory::Model::FEzItemSetPtr> Result;
    for (auto Item : *It)
    {
        if (Item.IsError())
        {
            return false;
        }
        Result.Add(Item.Current());
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "item"
    );
    
    // Start event handling
    var callbackId = domain.SubscribeItemSets(
        () => {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    domain.UnsubscribeItemSets(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).Inventory(
        inventoryName: "item"
    );
    var it = domain.ItemSets(
    );
    List<EzItemSet> items = new List<EzItemSet>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->Inventory(
        "item" // inventoryName
    );
    
    // Start event handling
    const auto CallbackId = Domain->SubscribeItemSets(
        []() {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    Domain->UnsubscribeItemSets(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

getSimpleInventoryModel

Get simple inventory model by specifying inventory name

Request

	Type	Condition	Required	Default	Value Limits	Description
namespaceName	string		✓		~ 128 chars	Namespace name
inventoryName	string		✓		~ 128 chars	Simple Inventory Model Name

Result

	Type	Description
item	EzSimpleInventoryModel	Simple Inventory Model

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).SimpleInventoryModel(
        inventoryName: "item"
    );
    var item = await domain.ModelAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).SimpleInventoryModel(
        inventoryName: "item"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->SimpleInventoryModel(
        "item" // inventoryName
    );
    const auto Future = Domain->Model();
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        return false;
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).SimpleInventoryModel(
        inventoryName: "item"
    );
    
    // Start event handling
    var callbackId = domain.Subscribe(
        value => {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    domain.Unsubscribe(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).SimpleInventoryModel(
        inventoryName: "item"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->SimpleInventoryModel(
        "item" // inventoryName
    );
    
    // Start event handling
    const auto CallbackId = Domain->Subscribe(
        [](TSharedPtr<Gs2::Inventory::Model::FSimpleInventoryModel> value) {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    Domain->Unsubscribe(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

listSimpleInventoryModels

Get list of simple inventory models

Request

	Type	Condition	Required	Default	Value Limits	Description
namespaceName	string		✓		~ 128 chars	Namespace name

Result

	Type	Description
items	List<EzSimpleInventoryModel>	List of Simple Inventory Models

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    );
    var items = await domain.SimpleInventoryModelsAsync(
    ).ToListAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    );
    var it = domain.SimpleInventoryModels(
    );
    List<EzSimpleInventoryModel> items = new List<EzSimpleInventoryModel>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    );
    const auto It = Domain->SimpleInventoryModels(
    );
    TArray<Gs2::UE5::Inventory::Model::FEzSimpleInventoryModelPtr> Result;
    for (auto Item : *It)
    {
        if (Item.IsError())
        {
            return false;
        }
        Result.Add(Item.Current());
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    );
    
    // Start event handling
    var callbackId = domain.SubscribeSimpleInventoryModels(
        () => {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    domain.UnsubscribeSimpleInventoryModels(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    );
    var it = domain.SimpleInventoryModels(
    );
    List<EzSimpleInventoryModel> items = new List<EzSimpleInventoryModel>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    );
    
    // Start event handling
    const auto CallbackId = Domain->SubscribeSimpleInventoryModels(
        []() {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    Domain->UnsubscribeSimpleInventoryModels(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

getSimpleItemModel

Get simple item model by specifying inventory name and item name

Request

	Type	Required	Value Limits	Description
namespaceName	string	✓	~ 128 chars	Namespace name
inventoryName	string	✓	~ 128 chars	Simple Inventory Model Name
itemName	string	✓	~ 128 chars	Simple Item Model Name

Result

	Type	Description
item	EzSimpleItemModel

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).SimpleInventoryModel(
        inventoryName: "item"
    ).SimpleItemModel(
        itemName: "item-master-0001"
    );
    var item = await domain.ModelAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).SimpleInventoryModel(
        inventoryName: "item"
    ).SimpleItemModel(
        itemName: "item-master-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->SimpleInventoryModel(
        "item" // inventoryName
    )->SimpleItemModel(
        "item-master-0001" // itemName
    );
    const auto Future = Domain->Model();
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        return false;
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).SimpleInventoryModel(
        inventoryName: "item"
    ).SimpleItemModel(
        itemName: "item-master-0001"
    );
    
    // Start event handling
    var callbackId = domain.Subscribe(
        value => {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    domain.Unsubscribe(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).SimpleInventoryModel(
        inventoryName: "item"
    ).SimpleItemModel(
        itemName: "item-master-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->SimpleInventoryModel(
        "item" // inventoryName
    )->SimpleItemModel(
        "item-master-0001" // itemName
    );
    
    // Start event handling
    const auto CallbackId = Domain->Subscribe(
        [](TSharedPtr<Gs2::Inventory::Model::FSimpleItemModel> value) {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    Domain->Unsubscribe(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

listSimpleItemModels

Get list of simple item models by specifying the inventory name

Request

	Type	Condition	Required	Default	Value Limits	Description
namespaceName	string		✓		~ 128 chars	Namespace name
inventoryName	string		✓		~ 128 chars	Simple Inventory Model Name

Result

	Type	Description
items	List<EzSimpleItemModel>	List of Simple Item Model

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).SimpleInventoryModel(
        inventoryName: "item"
    );
    var items = await domain.SimpleItemModelsAsync(
    ).ToListAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).SimpleInventoryModel(
        inventoryName: "item"
    );
    var it = domain.SimpleItemModels(
    );
    List<EzSimpleItemModel> items = new List<EzSimpleItemModel>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->SimpleInventoryModel(
        "item" // inventoryName
    );
    const auto It = Domain->SimpleItemModels(
    );
    TArray<Gs2::UE5::Inventory::Model::FEzSimpleItemModelPtr> Result;
    for (auto Item : *It)
    {
        if (Item.IsError())
        {
            return false;
        }
        Result.Add(Item.Current());
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).SimpleInventoryModel(
        inventoryName: "item"
    );
    
    // Start event handling
    var callbackId = domain.SubscribeSimpleItemModels(
        () => {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    domain.UnsubscribeSimpleItemModels(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).SimpleInventoryModel(
        inventoryName: "item"
    );
    var it = domain.SimpleItemModels(
    );
    List<EzSimpleItemModel> items = new List<EzSimpleItemModel>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->SimpleInventoryModel(
        "item" // inventoryName
    );
    
    // Start event handling
    const auto CallbackId = Domain->SubscribeSimpleItemModels(
        []() {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    Domain->UnsubscribeSimpleItemModels(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

consumeSimpleItems

Consume Item

Use this if you wish to consume items from within the game.

Therefore, this API should be used when items are consumed for elements that do not involve GS2.

Request

	Type	Required	Value Limits	Description
namespaceName	string	✓	~ 128 chars	Namespace name
inventoryName	string	✓	~ 128 chars	Simple Inventory Model Name
accessToken	string	✓	~ 128 chars	Access token
consumeCounts	List<EzConsumeCount>	✓	1 ~ 100 items	List of quantity of simple items to be consumed

Result

	Type	Description
items	List<EzSimpleItem>	List of simple items possession quantities per post-consumption

Error

Type	Base Type	Description
ConflictException	ConflictException	Item manipulation process conflicted. Retry required.
InsufficientException	BadRequestException	Insufficient quantity of items in your possession.

Implementation Example

try {
    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).SimpleInventory(
        inventoryName: "inventory-0001"
    );
    var result = await domain.ConsumeSimpleItemsAsync(
        consumeCounts: new List<Gs2.Unity.Gs2Inventory.Model.EzConsumeCount> {
            new Gs2.Unity.Gs2Inventory.Model.EzConsumeCount() {
                ItemName = "item-0001",
                Count = 5,
            },
            new Gs2.Unity.Gs2Inventory.Model.EzConsumeCount() {
                ItemName = "item-0002",
                Count = 3,
            },
        }
    );
    var item = await result.ModelAsync();
} catch(Gs2.Gs2Inventory.Exception.Conflict e) {
    // Item manipulation process conflicted. Retry required.
} catch(Gs2.Gs2Inventory.Exception.Insufficient e) {
    // Insufficient quantity of items in your possession.
}

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).SimpleInventory(
        inventoryName: "inventory-0001"
    );
    var future = domain.ConsumeSimpleItemsFuture(
        consumeCounts: new List<Gs2.Unity.Gs2Inventory.Model.EzConsumeCount> {
            new Gs2.Unity.Gs2Inventory.Model.EzConsumeCount() {
                ItemName = "item-0001",
                Count = 5,
            },
            new Gs2.Unity.Gs2Inventory.Model.EzConsumeCount() {
                ItemName = "item-0002",
                Count = 3,
            },
        }
    );
    yield return future;
    if (future.Error != null)
    {
        if (future.Error is Gs2.Gs2Inventory.Exception.ConflictException)
        {
            // Item manipulation process conflicted. Retry required.
        }
        if (future.Error is Gs2.Gs2Inventory.Exception.InsufficientException)
        {
            // Insufficient quantity of items in your possession.
        }
        onError.Invoke(future.Error, null);
        yield break;
    }
    var future2 = future.Result.ModelFuture();
    yield return future2;
    if (future2.Error != null)
    {
        onError.Invoke(future2.Error, null);
        yield break;
    }
    var result = future2.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->SimpleInventory(
        "inventory-0001" // inventoryName
    );
    const auto Future = Domain->ConsumeSimpleItems(
        []
        {
            auto v = MakeShared<TArray<TSharedPtr<Gs2::UE5::Inventory::Model::FEzConsumeCount>>>();
            v->Add(
                MakeShared<Gs2::UE5::Inventory::Model::FEzConsumeCount>()
                ->WithItemName(TOptional<FString>("item-0001"))
                ->WithCount(TOptional<int32>(5))
            );
            v->Add(
                MakeShared<Gs2::UE5::Inventory::Model::FEzConsumeCount>()
                ->WithItemName(TOptional<FString>("item-0002"))
                ->WithCount(TOptional<int32>(3))
            );
            return v;
        }() // consumeCounts
    );
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        auto e = Future->GetTask().Error();
        if (e->IsChildOf(Gs2::Inventory::Error::FConflictError::Class))
        {
            // Item manipulation process conflicted. Retry required.
        }
        if (e->IsChildOf(Gs2::Inventory::Error::FInsufficientError::Class))
        {
            // Insufficient quantity of items in your possession.
        }
        return false;
    }

    // obtain changed values / result values
    const auto Future2 = Future->GetTask().Result()->Model();
    Future2->StartSynchronousTask();
    if (Future2->GetTask().IsError())
    {
        return Future2->GetTask().Error();
    }
    const auto Result = Future2->GetTask().Result();

getSimpleItem

Retrieve items by specifying the inventory name and item name

Items may be divided into multiple stacks and responded to. Also, items with different expiration dates will always be in different stacks.

Request

	Type	Required	Value Limits	Description
namespaceName	string	✓	~ 128 chars	Namespace name
inventoryName	string	✓	~ 128 chars	Simple Inventory Model Name
itemName	string	✓	~ 128 chars	Simple Item Model Name
accessToken	string	✓	~ 128 chars	Access token

Result

	Type	Description
item	EzSimpleItem	Quantity of simple items
itemModel	EzSimpleItemModel	Simple Item Model

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).SimpleInventory(
        inventoryName: "item"
    ).SimpleItem(
        itemName: "item-0001"
    );
    var item = await domain.ModelAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).SimpleInventory(
        inventoryName: "item"
    ).SimpleItem(
        itemName: "item-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->SimpleInventory(
        "item" // inventoryName
    )->SimpleItem(
        "item-0001" // itemName
    );
    const auto Future = Domain->Model();
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        return false;
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).SimpleInventory(
        inventoryName: "item"
    ).SimpleItem(
        itemName: "item-0001"
    );
    
    // Start event handling
    var callbackId = domain.Subscribe(
        value => {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    domain.Unsubscribe(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).SimpleInventory(
        inventoryName: "item"
    ).SimpleItem(
        itemName: "item-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->SimpleInventory(
        "item" // inventoryName
    )->SimpleItem(
        "item-0001" // itemName
    );
    
    // Start event handling
    const auto CallbackId = Domain->Subscribe(
        [](TSharedPtr<Gs2::Inventory::Model::FSimpleItem> value) {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    Domain->Unsubscribe(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

getSimpleItemWithSignature

Retrieve signed items by specifying the inventory name and item name

This API allows you to prove that you own the item at the moment you call the API

Request

	Type	Required	Default	Value Limits	Description
namespaceName	string	✓		~ 128 chars	Namespace name
inventoryName	string	✓		~ 128 chars	Simple Inventory Model Name
itemName	string	✓		~ 128 chars	Simple Item Model Name
accessToken	string	✓		~ 128 chars	Access token
keyId	string	✓	“grn:gs2:{region}:{ownerId}:key:default:key:default”	~ 1024 chars	encryption key GRN

Result

	Type	Description
item	EzSimpleItem	Quantity of simple items
simpleItemModel	EzSimpleItemModel	Simple Item Model
body	string	Simple Item Set Information for Signature Subject
signature	string	Signature

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).SimpleInventory(
        inventoryName: "inventory-0001"
    ).SimpleItem(
        itemName: "item-0001"
    );
    var result = await domain.GetSimpleItemWithSignatureAsync(
        keyId: "key-0001"
    );
    var item = await result.ModelAsync();
    var body = result.Body;
    var signature = result.Signature;

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).SimpleInventory(
        inventoryName: "inventory-0001"
    ).SimpleItem(
        itemName: "item-0001"
    );
    var future = domain.GetSimpleItemWithSignatureFuture(
        keyId: "key-0001"
    );
    yield return future;
    if (future.Error != null)
    {
        onError.Invoke(future.Error, null);
        yield break;
    }
    var future2 = future.Result.ModelFuture();
    yield return future2;
    if (future2.Error != null)
    {
        onError.Invoke(future2.Error, null);
        yield break;
    }
    var result = future2.Result;
    var body = future.Result.Body;
    var signature = future.Result.Signature;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->SimpleInventory(
        "inventory-0001" // inventoryName
    )->SimpleItem(
        "item-0001" // itemName
    );
    const auto Future = Domain->GetSimpleItemWithSignature(
        "key-0001" // keyId
    );
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        return false;
    }

    // obtain changed values / result values
    const auto Future2 = Future->GetTask().Result()->Model();
    Future2->StartSynchronousTask();
    if (Future2->GetTask().IsError())
    {
        return Future2->GetTask().Error();
    }
    const auto Result = Future2->GetTask().Result();
    const auto Body = Result->Body;
    const auto Signature = Result->Signature;

listSimpleItems

Retrieves list of items owned in the specified inventory

Request

	Type	Required	Default	Value Limits	Description
namespaceName	string	✓		~ 128 chars	Namespace name
inventoryName	string	✓		~ 128 chars	Simple Inventory Model Name
accessToken	string	✓		~ 128 chars	Access token
pageToken	string			~ 1024 chars	Token specifying the position from which to start acquiring data
limit	int	✓	30	1 ~ 1000	Number of data acquired

Result

	Type	Description
items	List<EzSimpleItem>	List of Quantity of simple items
nextPageToken	string	Page token to retrieve the rest of the listing

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).SimpleInventory(
        inventoryName: "item"
    );
    var items = await domain.SimpleItemsAsync(
    ).ToListAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).SimpleInventory(
        inventoryName: "item"
    );
    var it = domain.SimpleItems(
    );
    List<EzSimpleItem> items = new List<EzSimpleItem>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->SimpleInventory(
        "item" // inventoryName
    );
    const auto It = Domain->SimpleItems(
    );
    TArray<Gs2::UE5::Inventory::Model::FEzSimpleItemPtr> Result;
    for (auto Item : *It)
    {
        if (Item.IsError())
        {
            return false;
        }
        Result.Add(Item.Current());
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).SimpleInventory(
        inventoryName: "item"
    );
    
    // Start event handling
    var callbackId = domain.SubscribeSimpleItems(
        () => {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    domain.UnsubscribeSimpleItems(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).SimpleInventory(
        inventoryName: "item"
    );
    var it = domain.SimpleItems(
    );
    List<EzSimpleItem> items = new List<EzSimpleItem>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->SimpleInventory(
        "item" // inventoryName
    );
    
    // Start event handling
    const auto CallbackId = Domain->SubscribeSimpleItems(
        []() {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    Domain->UnsubscribeSimpleItems(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

getBigInventoryModel

Get big inventory model by specifying inventory name

Request

	Type	Condition	Required	Default	Value Limits	Description
namespaceName	string		✓		~ 128 chars	Namespace name
inventoryName	string		✓		~ 128 chars	Big Inventory Model Name

Result

	Type	Description
item	EzBigInventoryModel	Big Inventory Model

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).BigInventoryModel(
        inventoryName: "item"
    );
    var item = await domain.ModelAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).BigInventoryModel(
        inventoryName: "item"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->BigInventoryModel(
        "item" // inventoryName
    );
    const auto Future = Domain->Model();
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        return false;
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).BigInventoryModel(
        inventoryName: "item"
    );
    
    // Start event handling
    var callbackId = domain.Subscribe(
        value => {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    domain.Unsubscribe(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).BigInventoryModel(
        inventoryName: "item"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->BigInventoryModel(
        "item" // inventoryName
    );
    
    // Start event handling
    const auto CallbackId = Domain->Subscribe(
        [](TSharedPtr<Gs2::Inventory::Model::FBigInventoryModel> value) {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    Domain->Unsubscribe(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

listBigInventoryModels

Get list of big inventory models

Request

	Type	Condition	Required	Default	Value Limits	Description
namespaceName	string		✓		~ 128 chars	Namespace name

Result

	Type	Description
items	List<EzBigInventoryModel>	List of Big Inventory Models

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    );
    var items = await domain.BigInventoryModelsAsync(
    ).ToListAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    );
    var it = domain.BigInventoryModels(
    );
    List<EzBigInventoryModel> items = new List<EzBigInventoryModel>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    );
    const auto It = Domain->BigInventoryModels(
    );
    TArray<Gs2::UE5::Inventory::Model::FEzBigInventoryModelPtr> Result;
    for (auto Item : *It)
    {
        if (Item.IsError())
        {
            return false;
        }
        Result.Add(Item.Current());
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    );
    
    // Start event handling
    var callbackId = domain.SubscribeBigInventoryModels(
        () => {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    domain.UnsubscribeBigInventoryModels(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    );
    var it = domain.BigInventoryModels(
    );
    List<EzBigInventoryModel> items = new List<EzBigInventoryModel>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    );
    
    // Start event handling
    const auto CallbackId = Domain->SubscribeBigInventoryModels(
        []() {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    Domain->UnsubscribeBigInventoryModels(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

getBigItemModel

Get big item model by specifying inventory name and item name

Request

	Type	Required	Value Limits	Description
namespaceName	string	✓	~ 128 chars	Namespace name
inventoryName	string	✓	~ 128 chars	Big Inventory Model Name
itemName	string	✓	~ 128 chars	Big Item Model Name

Result

	Type	Description
item	EzBigItemModel

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).BigInventoryModel(
        inventoryName: "item"
    ).BigItemModel(
        itemName: "item-master-0001"
    );
    var item = await domain.ModelAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).BigInventoryModel(
        inventoryName: "item"
    ).BigItemModel(
        itemName: "item-master-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->BigInventoryModel(
        "item" // inventoryName
    )->BigItemModel(
        "item-master-0001" // itemName
    );
    const auto Future = Domain->Model();
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        return false;
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).BigInventoryModel(
        inventoryName: "item"
    ).BigItemModel(
        itemName: "item-master-0001"
    );
    
    // Start event handling
    var callbackId = domain.Subscribe(
        value => {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    domain.Unsubscribe(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).BigInventoryModel(
        inventoryName: "item"
    ).BigItemModel(
        itemName: "item-master-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->BigInventoryModel(
        "item" // inventoryName
    )->BigItemModel(
        "item-master-0001" // itemName
    );
    
    // Start event handling
    const auto CallbackId = Domain->Subscribe(
        [](TSharedPtr<Gs2::Inventory::Model::FBigItemModel> value) {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    Domain->Unsubscribe(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

listBigItemModels

Get list of big item models by specifying the inventory name

Request

	Type	Condition	Required	Default	Value Limits	Description
namespaceName	string		✓		~ 128 chars	Namespace name
inventoryName	string		✓		~ 128 chars	Big Inventory Model Name

Result

	Type	Description
items	List<EzBigItemModel>	List of Big Item Model

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).BigInventoryModel(
        inventoryName: "item"
    );
    var items = await domain.BigItemModelsAsync(
    ).ToListAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).BigInventoryModel(
        inventoryName: "item"
    );
    var it = domain.BigItemModels(
    );
    List<EzBigItemModel> items = new List<EzBigItemModel>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->BigInventoryModel(
        "item" // inventoryName
    );
    const auto It = Domain->BigItemModels(
    );
    TArray<Gs2::UE5::Inventory::Model::FEzBigItemModelPtr> Result;
    for (auto Item : *It)
    {
        if (Item.IsError())
        {
            return false;
        }
        Result.Add(Item.Current());
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).BigInventoryModel(
        inventoryName: "item"
    );
    
    // Start event handling
    var callbackId = domain.SubscribeBigItemModels(
        () => {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    domain.UnsubscribeBigItemModels(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).BigInventoryModel(
        inventoryName: "item"
    );
    var it = domain.BigItemModels(
    );
    List<EzBigItemModel> items = new List<EzBigItemModel>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->BigInventoryModel(
        "item" // inventoryName
    );
    
    // Start event handling
    const auto CallbackId = Domain->SubscribeBigItemModels(
        []() {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    Domain->UnsubscribeBigItemModels(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

consumeBigItem

Consume Item

Use this if you wish to consume items from within the game.

Therefore, this API should be used when items are consumed for elements that do not involve GS2.

Request

	Type	Required	Value Limits	Description
namespaceName	string	✓	~ 128 chars	Namespace name
inventoryName	string	✓	~ 128 chars	Big Inventory Model Name
itemName	string	✓	~ 128 chars	Big Item Model Name
accessToken	string	✓	~ 128 chars	Access token
consumeCount	string	✓	~ 1024 chars	Quantity of big items to be consumed

Result

	Type	Description
item	EzBigItem	Quantity of big items held per post-consumption expiration date

Error

Type	Base Type	Description
ConflictException	ConflictException	Item manipulation process conflicted. Retry required.
InsufficientException	BadRequestException	Insufficient quantity of items in your possession.

Implementation Example

try {
    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).BigInventory(
        inventoryName: "inventory-0001"
    ).BigItem(
        itemName: "item-0001"
    );
    var result = await domain.ConsumeBigItemAsync(
        consumeCount: "1234567890123456789012345678901234567890"
    );
    var item = await result.ModelAsync();
} catch(Gs2.Gs2Inventory.Exception.Conflict e) {
    // Item manipulation process conflicted. Retry required.
} catch(Gs2.Gs2Inventory.Exception.Insufficient e) {
    // Insufficient quantity of items in your possession.
}

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).BigInventory(
        inventoryName: "inventory-0001"
    ).BigItem(
        itemName: "item-0001"
    );
    var future = domain.ConsumeBigItemFuture(
        consumeCount: "1234567890123456789012345678901234567890"
    );
    yield return future;
    if (future.Error != null)
    {
        if (future.Error is Gs2.Gs2Inventory.Exception.ConflictException)
        {
            // Item manipulation process conflicted. Retry required.
        }
        if (future.Error is Gs2.Gs2Inventory.Exception.InsufficientException)
        {
            // Insufficient quantity of items in your possession.
        }
        onError.Invoke(future.Error, null);
        yield break;
    }
    var future2 = future.Result.ModelFuture();
    yield return future2;
    if (future2.Error != null)
    {
        onError.Invoke(future2.Error, null);
        yield break;
    }
    var result = future2.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->BigInventory(
        "inventory-0001" // inventoryName
    )->BigItem(
        "item-0001" // itemName
    );
    const auto Future = Domain->ConsumeBigItem(
        "1234567890123456789012345678901234567890" // consumeCount
    );
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        auto e = Future->GetTask().Error();
        if (e->IsChildOf(Gs2::Inventory::Error::FConflictError::Class))
        {
            // Item manipulation process conflicted. Retry required.
        }
        if (e->IsChildOf(Gs2::Inventory::Error::FInsufficientError::Class))
        {
            // Insufficient quantity of items in your possession.
        }
        return false;
    }

    // obtain changed values / result values
    const auto Future2 = Future->GetTask().Result()->Model();
    Future2->StartSynchronousTask();
    if (Future2->GetTask().IsError())
    {
        return Future2->GetTask().Error();
    }
    const auto Result = Future2->GetTask().Result();

getBigItem

Retrieve items by specifying the inventory name and item name

Items may be divided into multiple stacks and responded to. Also, items with different expiration dates will always be in different stacks.

Request

	Type	Required	Value Limits	Description
namespaceName	string	✓	~ 128 chars	Namespace name
inventoryName	string	✓	~ 128 chars	Big Inventory Model Name
itemName	string	✓	~ 128 chars	Big Item Model Name
accessToken	string	✓	~ 128 chars	Access token

Result

	Type	Description
item	EzBigItem	Quantity of big items
itemModel	EzBigItemModel	Big Item Model

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).BigInventory(
        inventoryName: "item"
    ).BigItem(
        itemName: "item-0001"
    );
    var item = await domain.ModelAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).BigInventory(
        inventoryName: "item"
    ).BigItem(
        itemName: "item-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->BigInventory(
        "item" // inventoryName
    )->BigItem(
        "item-0001" // itemName
    );
    const auto Future = Domain->Model();
    Future->StartSynchronousTask();
    if (Future->GetTask().IsError())
    {
        return false;
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).BigInventory(
        inventoryName: "item"
    ).BigItem(
        itemName: "item-0001"
    );
    
    // Start event handling
    var callbackId = domain.Subscribe(
        value => {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    domain.Unsubscribe(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).BigInventory(
        inventoryName: "item"
    ).BigItem(
        itemName: "item-0001"
    );
    var future = domain.ModelFuture();
    yield return future;
    var item = future.Result;

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->BigInventory(
        "item" // inventoryName
    )->BigItem(
        "item-0001" // itemName
    );
    
    // Start event handling
    const auto CallbackId = Domain->Subscribe(
        [](TSharedPtr<Gs2::Inventory::Model::FBigItem> value) {
            // Called when the value changes
            // The "value" is passed the value after the change.
        }
    );

    // Stop event handling
    Domain->Unsubscribe(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.

listBigItems

Retrieves list of items owned in the specified inventory

Request

	Type	Required	Default	Value Limits	Description
namespaceName	string	✓		~ 128 chars	Namespace name
inventoryName	string	✓		~ 128 chars	Big Inventory Model Name
accessToken	string	✓		~ 128 chars	Access token
pageToken	string			~ 1024 chars	Token specifying the position from which to start acquiring data
limit	int	✓	30	1 ~ 1000	Number of data acquired

Result

	Type	Description
items	List<EzBigItem>	List of Quantity of big items
nextPageToken	string	Page token to retrieve the rest of the listing

Implementation Example

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).BigInventory(
        inventoryName: "item"
    );
    var items = await domain.BigItemsAsync(
    ).ToListAsync();

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).BigInventory(
        inventoryName: "item"
    );
    var it = domain.BigItems(
    );
    List<EzBigItem> items = new List<EzBigItem>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->BigInventory(
        "item" // inventoryName
    );
    const auto It = Domain->BigItems(
    );
    TArray<Gs2::UE5::Inventory::Model::FEzBigItemPtr> Result;
    for (auto Item : *It)
    {
        if (Item.IsError())
        {
            return false;
        }
        Result.Add(Item.Current());
    }

Value change event handling

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).BigInventory(
        inventoryName: "item"
    );
    
    // Start event handling
    var callbackId = domain.SubscribeBigItems(
        () => {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    domain.UnsubscribeBigItems(callbackId);

    var domain = gs2.Inventory.Namespace(
        namespaceName: "namespace-0001"
    ).Me(
        gameSession: GameSession
    ).BigInventory(
        inventoryName: "item"
    );
    var it = domain.BigItems(
    );
    List<EzBigItem> items = new List<EzBigItem>();
    while (it.HasNext())
    {
        yield return it.Next();
        if (it.Error != null)
        {
            onError.Invoke(it.Error, null);
            break;
        }
        if (it.Current != null)
        {
            items.Add(it.Current);
        }
        else
        {
            break;
        }
    }

    const auto Domain = Gs2->Inventory->Namespace(
        "namespace-0001" // namespaceName
    )->Me(
        GameSession
    )->BigInventory(
        "item" // inventoryName
    );
    
    // Start event handling
    const auto CallbackId = Domain->SubscribeBigItems(
        []() {
            // Called when an element of the list changes.
        }
    );

    // Stop event handling
    Domain->UnsubscribeBigItems(CallbackId);

Warning

This event is called when the value in the local cache that the SDK has is changed.

Therefore, callbacks will not be invoked if the value is changed in any other way.