# Button Merchant Library

## Version
1.6.1

### Namespace
- androidJvm

### Main Package
- [ButtonMerchantLibrary](https://building.usebutton.com/button-merchant-android/latest/index.html)

### Subpackages
- [com.usebutton.merchant](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/index.html)
- [com.usebutton.merchant.exception](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant.exception/index.html)
- [com.usebutton.merchant.module](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant.module/index.html)

### Key Classes
- [ActivityReportingTask](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-activity-reporting-task/index.html)
- [ButtonMerchant](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-button-merchant/index.html)
- [AttributionTokenListener](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-button-merchant/-attribution-token-listener/index.html)
- [ButtonProduct](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-button-product/index.html)
- [Order](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-order/index.html)
- [UserActivityListener](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant/-user-activity-listener/index.html)

### List of Exceptions
- [ApplicationIdNotFoundException](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant.exception/-application-id-not-found-exception/index.html)
- [ButtonNetworkException](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant.exception/-button-network-exception/index.html)
- [HttpStatusException](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant.exception/-http-status-exception/index.html)
- [NetworkNotFoundException](https://building.usebutton.com/button-merchant-android/latest/-button%20-merchant%20-library/com.usebutton.merchant.exception/-network-not-found-exception/index.html)

### Key Methods
#### getUpc
- **Return**: the UPC (Universal Product Code) of the product  
- **Signature**:  
  `@Nullable`
  `abstract fun getUpc(): String`