Xsolla UE4 SDK is used to integrate Xsolla products with apps based on the Unreal Engine 4. The solution includes the following SDKs:

* Xsolla Login UE4 SDK
* Xsolla Store UE4 SDK
* Xsolla Pay Station UE4 SDK

Check https://github.com/xsolla/store-ue4-sdk for further details.