Update proguard-rules.pro

app/proguard-rules.pro

@@ -1,21 +1,3 @@
-# Add project specific ProGuard rules here.
-# By default, the flags in this file are appended to flags specified
-# in /Users/topjohnwu/Library/Android/sdk/tools/proguard/proguard-android.txt
-# You can edit the include path and order by changing the proguardFiles
-# directive in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
-
-# Add any project specific keep options here:
-
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
-
 # Parcelable
 -keepclassmembers class * implements android.os.Parcelable {
     public static final ** CREATOR;
@@ -26,6 +8,9 @@
 	public static void check*(...);
 	public static void throw*(...);
 }
+-assumenosideeffects class java.util.Objects {
+    public static ** requireNonNull(...);
+}
 
 # Stub
 -keep class com.topjohnwu.magisk.core.App { <init>(java.lang.Object); }
@@ -34,6 +19,11 @@
   boolean mActivityHandlesUiMode;
 }
 
+# main
+-keep,allowoptimization public class com.topjohnwu.magisk.signing.SignBoot {
+    public static void main(java.lang.String[]);
+}
+
 # Strip Timber verbose and debug logging
 -assumenosideeffects class timber.log.Timber$Tree {
   public void v(**);

app/src/main/java/com/topjohnwu/magisk/signing/SignBoot.java

@@ -1,6 +1,5 @@
 package com.topjohnwu.magisk.signing;
 
-import androidx.annotation.Keep;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
@@ -33,7 +32,6 @@ import java.security.cert.CertificateFactory;
 import java.security.cert.X509Certificate;
 import java.util.Arrays;
 
-@Keep
 public class SignBoot {
 
     private static final int BOOT_IMAGE_HEADER_V1_RECOVERY_DTBO_SIZE_OFFSET = 1632;