[BWA-110] Retrofit ProGuard missing rule (#291)

app/build.gradle.kts

@@ -162,7 +162,6 @@ dependencies {
     ksp(libs.google.hilt.compiler)
     implementation(libs.google.guava)
     implementation(libs.google.protobuf.javalite)
-    implementation(libs.jakewharton.retrofit.kotlinx.serialization)
     implementation(libs.kotlinx.collections.immutable)
     implementation(libs.kotlinx.coroutines.android)
     implementation(libs.kotlinx.serialization.json)

app/proguard-rules.pro

@@ -74,6 +74,33 @@
     @com.sun.jna.* *;
 }
 
+################################################################################
+# Okhttp/Retrofit https://square.github.io/okhttp/ & https://square.github.io/retrofit/
+################################################################################
+
+# Retrofit does reflection on generic parameters. InnerClasses is required to use Signature and
+# EnclosingMethod is required to use InnerClasses.
+-keepattributes Signature, InnerClasses, EnclosingMethod
+
+# Retrofit does reflection on method and parameter annotations.
+-keepattributes RuntimeVisibleAnnotations, RuntimeVisibleParameterAnnotations
+
+# https://github.com/square/okhttp/blob/339732e3a1b78be5d792860109047f68a011b5eb/okhttp/src/jvmMain/resources/META-INF/proguard/okhttp3.pro#L11-L14
+-dontwarn okhttp3.internal.platform.**
+-dontwarn org.bouncycastle.**
+# Related to this issue on https://github.com/square/retrofit/issues/3880
+# Check https://github.com/square/retrofit/tags for new versions
+-keep,allowobfuscation,allowshrinking class kotlin.Result
+-keep,allowobfuscation,allowshrinking interface retrofit2.Call
+-keep,allowobfuscation,allowshrinking class retrofit2.Response
+# This solves this issue https://github.com/square/retrofit/issues/3880
+-keep,allowobfuscation,allowshrinking class kotlin.coroutines.Continuation
+
+# With R8 full mode, it sees no subtypes of Retrofit interfaces since they are created with a Proxy
+# and replaces all potential values with null. Explicitly keeping the interfaces prevents this.
+-if interface * { @retrofit2.http.* <methods>; }
+-keep,allowobfuscation interface <1>
+
 ################################################################################
 # ZXing
 ################################################################################

app/src/main/kotlin/com/bitwarden/authenticator/data/platform/datasource/network/retrofit/RetrofitsImpl.kt

@@ -4,11 +4,11 @@ import com.bitwarden.authenticator.data.platform.datasource.network.core.ResultC
 import com.bitwarden.authenticator.data.platform.datasource.network.interceptor.BaseUrlInterceptor
 import com.bitwarden.authenticator.data.platform.datasource.network.interceptor.BaseUrlInterceptors
 import com.bitwarden.authenticator.data.platform.datasource.network.interceptor.HeadersInterceptor
-import com.jakewharton.retrofit2.converter.kotlinx.serialization.asConverterFactory
 import kotlinx.serialization.json.Json
 import okhttp3.MediaType.Companion.toMediaType
 import okhttp3.OkHttpClient
 import retrofit2.Retrofit
+import retrofit2.converter.kotlinx.serialization.asConverterFactory
 
 /**
  * Primary implementation of [Retrofits].