Proguard: Add placeholder rules

app/proguard-rules.pro

@@ -19,3 +19,58 @@
 # If you keep the line number information, uncomment this to
 # hide the original source file name.
 #-renamesourcefileattribute SourceFile
+
+# Firebase rules
+-keepattributes *Annotation*
+-keepattributes SourceFile,LineNumberTable
+-keep public class * extends java.lang.Exception
+
+-keep class com.crashlytics.** { *; }
+-dontwarn com.crashlytics.**
+
+# OkHttp rules
+# JSR 305 annotations are for embedding nullability information.
+-dontwarn javax.annotation.**
+# A resource is loaded with a relative path so the package of this class must be preserved.
+-keepnames class okhttp3.internal.publicsuffix.PublicSuffixDatabase
+# Animal Sniffer compileOnly dependency to ensure APIs are compatible with older versions of Java.
+-dontwarn org.codehaus.mojo.animal_sniffer.*
+# OkHttp platform used only on JVM and when Conscrypt dependency is available.
+-dontwarn okhttp3.internal.platform.ConscryptPlatform
+
+#About libaries rules
+-keep class .R
+-keep class **.R$* {
+    <fields>;
+}
+
+# Gson rules
+
+# Gson uses generic type information stored in a class file when working with fields. Proguard
+# removes such information by default, so configure it to keep all of it.
+-keepattributes Signature
+# For using GSON @Expose annotation
+-keepattributes *Annotation*
+# Gson specific classes
+-dontwarn sun.misc.**
+#-keep class com.google.gson.stream.** { *; }
+# Application classes that will be serialized/deserialized over Gson
+-keep class com.google.gson.examples.android.model.** { *; }
+# Prevent proguard from stripping interface information from TypeAdapterFactory,
+# JsonSerializer, JsonDeserializer instances (so they can be used in @JsonAdapter)
+-keep class * implements com.google.gson.TypeAdapterFactory
+-keep class * implements com.google.gson.JsonSerializer
+-keep class * implements com.google.gson.JsonDeserializer
+
+# Butterknife rules
+
+# Retain generated class which implement Unbinder.
+-keep public class * implements butterknife.Unbinder { public <init>(**, android.view.View); }
+# Prevent obfuscation of types which use ButterKnife annotations since the simple name
+# is used to reflectively look up the generated ViewBinding.
+-keep class butterknife.*
+-keepclasseswithmembernames class * { @butterknife.* <methods>; }
+-keepclasseswithmembernames class * { @butterknife.* <fields>; }
+
+-keep class org.apache.http.**
+-keep interface org.apache.http.**