# PurchaseClient.Builder

```
public static final class PurchaseClient.Builder
```

```
java.lang.Object
    ↳ com.gaa.sdk.iap.PurchaseClient.Builder
```

<br>

It is a builder for creating the PurchaseClient instances.

## Public Methods <a href="#purchaseclient.builder-publicmethods" id="purchaseclient.builder-publicmethods"></a>

***

### setBase64PublicKey <a href="#purchaseclient.builder-setbase64publickey" id="purchaseclient.builder-setbase64publickey"></a>

```
@UiThread
public PurchaseClient.Builder setBase64PublicKey(String base64PublicKey)
```

Specify the public key issued by Developer Center for checking the validity of purchase information.

| **Parameters:**                   |                        |
| --------------------------------- | ---------------------- |
| base64PublicKey                   | base64EncodedPublicKey |
| **Returns**                       |                        |
| <p>PurchaseClient.Builder<br></p> |                        |

### setListener <a href="#purchaseclient.builder-setlistener" id="purchaseclient.builder-setlistener"></a>

```
@UiThread
public PurchaseClient.Builder setListener( listener)
```

Specify to receive the onPurchasesUpdated event.

| **Parameters:**                   |                                                                                                          |
| --------------------------------- | -------------------------------------------------------------------------------------------------------- |
| listener                          | [PurchasesUpdatedListener](https://dev.onestore.co.kr/wiki/en/doc/purchasesupdatedlistener-5833461.html) |
| **Returns:**                      |                                                                                                          |
| <p>PurchaseClient.Builder<br></p> |                                                                                                          |

### build <a href="#purchaseclient.builder-build" id="purchaseclient.builder-build"></a>

```
@UiThread
public  build()
```

It creates PurchaseClient instances.

| **Return:**                                                                          |                                               |
| ------------------------------------------------------------------------------------ | --------------------------------------------- |
| [PurchaseClient](https://dev.onestore.co.kr/wiki/en/doc/purchaseclient-5833436.html) |                                               |
| **Throws:**                                                                          |                                               |
| java.lang.IllegalArgumentException                                                   | It occurs if context or listener is abnormal. |