From bb2a05d1e554a41735267998ff78f1f53c98dd6b Mon Sep 17 00:00:00 2001
From: machiav3lli <antonios.hazim@tutanota.com>
Date: Mon, 6 Jun 2022 10:08:28 +0200
Subject: [PATCH] Fix: R8 exclusion of serializables

---
 proguard.pro | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/proguard.pro b/proguard.pro
index c4b40244..a32c7e16 100644
--- a/proguard.pro
+++ b/proguard.pro
@@ -3,3 +3,30 @@
 # Disable ServiceLoader reproducibility-breaking optimizations
 -keep class kotlinx.coroutines.CoroutineExceptionHandler
 -keep class kotlinx.coroutines.internal.MainDispatcherFactory
+
+# Keep `Companion` object fields of serializable classes.
+# This avoids serializer lookup through `getDeclaredClasses` as done for named companion objects.
+-if @kotlinx.serialization.Serializable class **
+-keepclassmembers class <1> {
+    static <1>$Companion Companion;
+}
+
+# Keep `serializer()` on companion objects (both default and named) of serializable classes.
+-if @kotlinx.serialization.Serializable class ** {
+    static **$* *;
+}
+-keepclassmembers class <2>$<3> {
+    kotlinx.serialization.KSerializer serializer(...);
+}
+
+# Keep `INSTANCE.serializer()` of serializable objects.
+-if @kotlinx.serialization.Serializable class ** {
+    public static ** INSTANCE;
+}
+-keepclassmembers class <1> {
+    public static <1> INSTANCE;
+    kotlinx.serialization.KSerializer serializer(...);
+}
+
+# @Serializable and @Polymorphic are used at runtime for polymorphic serialization.
+-keepattributes RuntimeVisibleAnnotations,AnnotationDefault
\ No newline at end of file