Try adding consumer-rules and proguard-rules

Author: ospfranco

OpacityCore/consumer-rules.pro

@@ -0,0 +1,2 @@
+-keep class com.opacitylabs.opacitycore.** { *; }
+-keepclassmembers class com.opacitylabs.opacitycore.** { *; }

OpacityCore/proguard-rules.pro

@@ -1,22 +1,93 @@
-# Add project specific ProGuard rules here.
-# You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
-
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
-
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
+# Keep all public API classes and methods - this is your main library interface
+-keep public class com.opacitylabs.opacitycore.** { 
+    public *; 
+}
+
+# Keep the main OpacityCore object and all its methods (including native methods)
+-keep class com.opacitylabs.opacitycore.OpacityCore {
+    <fields>;
+    <methods>;
+    native <methods>;
+}
+
+# Keep data classes and response models
+-keep class com.opacitylabs.opacitycore.OpacityResponse { *; }
+-keep class com.opacitylabs.opacitycore.OpacityError { *; }
+
+# Keep the InAppBrowserActivity as it's referenced by string name
+-keep class com.opacitylabs.opacitycore.InAppBrowserActivity { *; }
+
+# Keep utility classes
+-keep class com.opacitylabs.opacitycore.JsonUtils { *; }
+-keep class com.opacitylabs.opacitycore.JsonToAnyConverter { *; }
+-keep class com.opacitylabs.opacitycore.JsonToAnyConverter$Companion { *; }
+-keep class com.opacitylabs.opacitycore.CryptoManager { *; }
+-keep class com.opacitylabs.opacitycore.CookieResultReceiver { *; }
+
+# Keep all enums and their methods
+-keepclassmembers enum com.opacitylabs.opacitycore.** {
+    public static **[] values();
+    public static ** valueOf(java.lang.String);
+    **[] $VALUES;
+}
+
+# Keep companion objects (especially for OpacityCore object)
+-keep class com.opacitylabs.opacitycore.**$Companion { *; }
+
+# Keep Kotlin serialization support
+-keep @kotlinx.serialization.Serializable class com.opacitylabs.opacitycore.** { *; }
+-keepattributes *Annotation*, InnerClasses
+-dontnote kotlinx.serialization.AnnotationsKt
+-dontnote kotlinx.serialization.SerializationKt
+
+# Keep Kotlin metadata for reflection
+-keepattributes RuntimeVisibleAnnotations,RuntimeVisibleParameterAnnotations,RuntimeVisibleTypeAnnotations
+
+# Keep all constructors
+-keepclassmembers class com.opacitylabs.opacitycore.** {
+    <init>(...);
+}
+
+# Keep methods that might be called via reflection or JNI
+-keepclassmembers class com.opacitylabs.opacitycore.** {
+    public <methods>;
+    private <methods>;
+}
+
+# Keep native methods (important for JNI)
+-keepclasseswithmembernames class * {
+    native <methods>;
+}
+
+# Keep classes that extend Android components
+-keep class * extends android.app.Activity
+-keep class * extends android.content.BroadcastReceiver
+-keep class * extends android.os.Parcelable
+
+# Keep GeckoView related classes (since you use Mozilla GeckoView)
+-keep class org.mozilla.geckoview.** { *; }
+-dontwarn org.mozilla.geckoview.**
+
+# Keep security crypto classes
+-keep class androidx.security.crypto.** { *; }
+-dontwarn androidx.security.crypto.**
+
+# Keep JSON handling classes
+-keep class org.json.** { *; }
+-dontwarn org.json.**
+
+# Keep coroutines support
+-keep class kotlinx.coroutines.** { *; }
+-keep class kotlin.coroutines.** { *; }
+
+# Keep Kotlin standard library
+-keep class kotlin.** { *; }
+-keep class kotlin.Metadata { *; }
+-dontwarn kotlin.**
+
+# Preserve line number information for debugging stack traces
+-keepattributes SourceFile,LineNumberTable
 
 # If you keep the line number information, uncomment this to
 # hide the original source file name.
-#-renamesourcefileattribute SourceFile
--keep class com.opacitylabs.opacitycore.OpacityResponse { *; }
+#-renamesourcefileattribute SourceFile