Added more proguard restrictions and rules for kotlin and moshi

app/build.gradle

@@ -28,7 +28,7 @@ android {
 
     buildTypes {
         release {
-            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro', 'proguard-moshi.pro', 'proguard-kotlin.pro'
         }
     }
 

app/proguard-kotlin.pro

@@ -0,0 +1,15 @@
+-dontusemixedcaseclassnames
+-keep class kotlin.** { *; }
+-keep class kotlin.Metadata { *; }
+-dontwarn kotlin.**
+-keepclassmembers class kotlin.Metadata {
+    public <methods>;
+}
+
+# Removes runtime null checks - doesn't really matter if it crashes on kotlin or java NPE
+-assumenosideeffects class kotlin.jvm.internal.Intrinsics {
+    static void checkParameterIsNotNull(java.lang.Object, java.lang.String);
+}
+
+# Useless option for dex
+-dontpreverify

app/proguard-moshi.pro

@@ -0,0 +1,49 @@
+# JSR 305 annotations are for embedding nullability information.
+-dontwarn javax.annotation.**
+
+-keepclasseswithmembers class * {
+    @com.squareup.moshi.* <methods>;
+}
+
+-keep @com.squareup.moshi.JsonQualifier interface *
+
+# Enum field names are used by the integrated EnumJsonAdapter.
+# Annotate enums with @JsonClass(generateAdapter = false) to use them with Moshi.
+-keepclassmembers @com.squareup.moshi.JsonClass class * extends java.lang.Enum {
+    <fields>;
+}
+
+# The name of @JsonClass types is used to look up the generated adapter.
+-keepnames @com.squareup.moshi.JsonClass class *
+
+# Retain generated JsonAdapters if annotated type is retained.
+-if @com.squareup.moshi.JsonClass class *
+-keep class <1>JsonAdapter {
+    <init>(...);
+    <fields>;
+}
+-if @com.squareup.moshi.JsonClass class **$*
+-keep class <1>_<2>JsonAdapter {
+    <init>(...);
+    <fields>;
+}
+-if @com.squareup.moshi.JsonClass class **$*$*
+-keep class <1>_<2>_<3>JsonAdapter {
+    <init>(...);
+    <fields>;
+}
+-if @com.squareup.moshi.JsonClass class **$*$*$*
+-keep class <1>_<2>_<3>_<4>JsonAdapter {
+    <init>(...);
+    <fields>;
+}
+-if @com.squareup.moshi.JsonClass class **$*$*$*$*
+-keep class <1>_<2>_<3>_<4>_<5>JsonAdapter {
+    <init>(...);
+    <fields>;
+}
+-if @com.squareup.moshi.JsonClass class **$*$*$*$*$*
+-keep class <1>_<2>_<3>_<4>_<5>_<6>JsonAdapter {
+    <init>(...);
+    <fields>;
+}