# Initialization

## **Import SDK**

To use the Wepin React Native Provider SDK, you first need to import the SDK. Add the following import statements:

```javascript
import WepinProvider from '@wepin/provider-rn';
```

## Creating **the WepinProviderSDK Instance**

Before creating an instance of `WepinProvider`, you must register your app's Android/iOS information in the Wepin Workspace.

{% content-ref url="../../../wepin/workspace/app-registration-and-key-issuance" %}
[app-registration-and-key-issuance](https://docs.wepin.io/en/wepin/workspace/app-registration-and-key-issuance)
{% endcontent-ref %}

Using the registered app information, create an instance of `WepinProvider`. Create the `WepinProvider` instance as follows:

```javascript
const wepinProvider = new WepinProvider({
  appId: 'wepinAppId',
  appKey: 'wepinAppKey',
});
```

## **SDK Initialization (init)**

When initializing the Wepin React Native Provider SDK, you can define the required widget properties.

```javascript
await wepinProvider.init();
```

#### **Parameters**

* **attributes** <`IWepinSDKAttributes`> **optional**
  * defaultLanguage: - `defaultLanguage`: The language to be displayed on the widget (default: `'en'`) Currently, only `ko`, `en`, and `ja` are supported.
  * **defaultCurrency**: The currency to be displayed on the widget (default: `'USD'`) Currently, only `'KRW'`,`'USD'` and `'JPY'` are supported.

#### **Return value**

* **Promise**<`boolean`>

#### **Example**

```javascript
await wepinPin.init({
  defaultLanguage: 'ko',
  defaultCurrency: 'KRW',
});
```

## **Checking Initialization Status (isInitialized)**

You can check whether the Wepin Provider SDK has been successfully initialized.

```javascript
wepinProvider.isInitialized();
```

#### **Parameters**

* **None**

#### **Return Value**

* **\<boolean>**
  * Returns `true` if the initialization was successful, and `false` if it failed.

## **Changing Language**

Change the language and currency of the widget.

```javascript
await wepinProvider.changeLanguage({ language, currency });
```

#### **Parameters**

* **\<object>**
  * **language** `<String>`\
    `-` The language to be displayed on the widget. Currently, only `'ko'`, `'en'` and `'ja'` are supported.
  * **currency** `<String>`\
    **optional -** The currency to be displayed on the widget. Currently, only `'KRW'`, `'USD'` and `'JPY'` are supported.