> For the complete documentation index, see [llms.txt](https://playnetwork.gitbook.io/play-sdk-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://playnetwork.gitbook.io/play-sdk-documentation/v0.12.0/sdk-integration-guides/currency-iap/unreal.md).

# Unreal

Unreal integration

## Introduction

Every project may have multiple custom currencies. For example "diamonds" and/or "cash". Aside from these typical game currencies, projects wishing to sell NFTs must integrate a specific currency. The internal name for this currency is "rgn-coin". When the "rgn-coin" is presented in the UI it can have any currency name, for example, "gems".

The "rgn-coin" can only be sold using in-app purchases. For more information, please refer to the [Currency GDG](/play-sdk-documentation/v0.12.0/game-design-guides/currency-iap.md#feature-overview).

Other typical currencies can be added and used in an expected manner - as rewards to the user's account, or sold for in-app purchases.

### **Purchase** `rgn-coin` (IAP required)

Purchasing `rgn-coin` works a bit differently, it has its own API called `PurchaseRGNCoinAsync(string iapUUID)`

You will need to get the transactionId and receipt when the in app purchase is completed. 

<details>

<summary><code>rgn-coin</code> Products</summary>

10 rgn-coin :

```json
"uid": "4a13bcd3-ff64-43a4-8c13-e978d968f68c",
"priceInUSD": 0.99,
"quantity": 10
```

20 rgn-coin :

```json
"uid": "0eeae85c-c9af-47f0-8df4-56a4442c23d7",
"priceInUSD": 1.99,
"quantity": 20
```

30 rgn-coin :&#x20;

```json
"uid": "9d2ed68b-2a6c-45d4-bc07-29f256799943",
"priceInUSD": 2.99,
"quantity": 30
```

50 rgn-coin :&#x20;

```json
"uid": "b7bcbbf6-753d-47dd-8bff-93b4539c825d",
"priceInUSD": 4.99,
"quantity": 50
```

110 rgn-coin : &#x20;

```json
"uid": "b81e8e95-59a6-4a77-b1bc-f5b7d6eacfa4",
"priceInUSD": 9.99,
"quantity": 110
```

300 rgn-coin :&#x20;

```json
"uid": "f35c4f83-cf22-4723-828a-66e8069614eb",
"priceInUSD": 24.99,
"quantity": 300
```

500 rgn-coin :&#x20;

```json
"uid": "3c814835-9f6f-4947-98f0-6e70964b887d",
"priceInUSD": 39.99,
"quantity": 500
```

1000 rgn-coin :&#x20;

```json
"uid": "b65994dc-ecfd-4549-ab32-51e196947c8b",
"priceInUSD": 69.99,
"quantity": 1000
```

</details>

#### **Get user rgn-coin quantity**

{% embed url="<https://blueprintue.com/blueprint/lk_wivet>" %}

#### Add rgn-coin to user

{% embed url="<https://blueprintue.com/blueprint/_9h50-k8>" %}

### Custom currency

#### Get user custom currency quantity

{% embed url="<https://blueprintue.com/blueprint/t_blkwjp>" %}

#### Add custom currency to user

{% embed url="<https://blueprintue.com/blueprint/6gkb-tm2>" %}