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    Updating the Gradle Build Properties
    In Android Studio, open the app directory (which can also be labeled Module:
                app) and open the 
build.gradle
 file. Edit the Gradle file located in the app
                directory. Add the contents shown in the example below to the Gradle
            file.If your project uses Progurad, add the lines shown below to therepositories { ... maven { url "https://cardinalcommerceprod.jfrog.io/artifactory/android" credentials { username Artifactory username password Artifactory user API Key } } } dependencies { ... //Cardinal Mobile SDK implementation 2.5-1 }
proguard-rules.pro
 file.
            -keep class com.cardinalcommerce.dependencies.internal.bouncycastle.** -keep class com.cardinalcommerce.dependencies.internal.nimbusds.**