ONE store **In-App Integration Library *v1.3.2*** is a service that sells and charges products implemented in Android apps to users using ONE store's authentication and payment system, and settles them with the developers.
In order to pay for in-app products, it must be linked with the ONE store service (OSS) app, and the OSS app works with the ONE store payment server to conduct payments for in-app products.
### Caution
These are required libraries for using in-app purchases or check licenses.
**It's already obfuscated and in aar, so add the package to the proguard rules.**
```text
# Core proGuard rules
-keep class com.gaa.sdk.base.** { *; }
-keep class com.gaa.sdk.auth.** { *; }
# Purchasing proGuard rules
-keep class com.gaa.sdk.iap.** { *; }
# Licensing proGuard rules
-keep class com.onestore.extern.licensing.** { *; }
```
## Include external dependencies
The In-app integration Unity Library is distributed with the [EDM4U(External Dependency Manager for Unity)](https://github.com/googlesamples/unity-jar-resolver).
This library is intended for use by any Unity plugin that requires access to Android-specific libraries. It provides Unity plugins the ability to declare dependencies, which are then automatically resolved and copied into your Unity project.