fix errors

dist/linux/debian/control

@@ -2,7 +2,7 @@ Source: cryptomator
 Maintainer: Cryptobot <releases@cryptomator.org>
 Section: utils
 Priority: optional
-Build-Depends: debhelper (>=10), coffeelibs-jdk-19, libgtk2.0-0, libgtk-3-0,  libxxf86vm1, libgl1
+Build-Depends: debhelper (>=10), coffeelibs-jdk-20, libgtk2.0-0, libgtk-3-0,  libxxf86vm1, libgl1
 Standards-Version: 4.5.0
 Homepage: https://cryptomator.org
 Vcs-Git: https://github.com/cryptomator/cryptomator.git

src/main/java/org/cryptomator/ipc/IpcMessage.java

@@ -9,8 +9,8 @@ import java.nio.channels.ReadableByteChannel;
 import java.nio.channels.WritableByteChannel;
 import java.util.function.Function;
 
-// TODO make sealed, remove enum
-interface IpcMessage {
+//TODO can the enum be removed?
+sealed interface IpcMessage permits HandleLaunchArgsMessage, RevealRunningAppMessage {
 
 	enum MessageType {
 		REVEAL_RUNNING_APP(RevealRunningAppMessage::decode),