Enable proguard's minify and fix warnings to be able to create the apks.

app/build.gradle

@@ -28,15 +28,12 @@ android {
     }
     buildTypes {
         release {
-            // TODO Fix minify issues and enable again
-            minifyEnabled false
-            shrinkResources false
+            minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
             // enable crashlytics
             ext.enableCrashlytics = true
         }
         debug {
-            // TODO enabling minify breaks the debugger breakpoints, find a way to fix it and enable minify again
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
             resValue("string", "PORT_NUMBER", "8082")

app/proguard-rules.pro

@@ -20,13 +20,59 @@
 # hide the original source file name.
 #-renamesourcefileattribute SourceFile
 
--dontwarn sun.misc.Unsafe
--dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
--dontwarn org.bitcoinj.store**
--dontwarn org.slf4j.**
--dontwarn okhttp3.internal.platform.*
+###### itextpdf & opencsv
+-dontwarn java.awt.**
+-dontwarn javax.security.**
+-dontwarn java.beans.**
 
-# Firabase Crashlytics
+-dontwarn com.itextpdf.awt.**
+-dontwarn javax.imageio.**
+
+-keep class org.bouncycastle.**
+-dontwarn org.bouncycastle.**
+
+-keep class org.spongycastle.** { *; }
+-dontwarn org.spongycastle.**
+
+-keep class javax.xml.crypto.dsig.** { *; }
+-dontwarn javax.xml.crypto.dsig.**
+
+-keep class org.apache.jcp.xml.dsig.internal.dom.** { *; }
+-dontwarn org.apache.jcp.xml.dsig.internal.dom.**
+
+-keep class javax.xml.crypto.dom.** { *; }
+-dontwarn javax.xml.crypto.dom.**
+
+-keep class org.apache.xml.security.utils.** { *; }
+-dontwarn org.apache.xml.security.utils.**
+
+-keep class javax.xml.crypto.XMLStructure
+-dontwarn javax.xml.crypto.XMLStructure
+
+
+###### OkHttp
+# 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
+
+
+###### bitcoinj
+-dontwarn org.bitcoinj.store**
+
+
+###### ???
+-dontwarn org.slf4j.**
+
+
+###### Firabase Crashlytics
 -keepattributes *Annotation*
 -keepattributes SourceFile,LineNumberTable
 -keep public class * extends java.lang.Exception

build.gradle

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.3.20'
+    ext.kotlin_version = '1.3.21'
     ext.nav_version = '1.0.0-beta01'
     repositories {
         google()
@@ -12,11 +12,11 @@ buildscript {
 
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.0'
+        classpath 'com.android.tools.build:gradle:3.3.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "android.arch.navigation:navigation-safe-args-gradle-plugin:$nav_version"
         classpath 'com.google.gms:google-services:4.2.0'
-        classpath 'io.fabric.tools:gradle:1.27.0'
+        classpath 'io.fabric.tools:gradle:1.27.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files