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Is there a way to obfuscate my mod? Because it's on a server and I don'd want anybody to use my code... I've read about the Proguard, but I can't make it to work.. Ui: Sorry about the bad English...

Posted

Like diesieben07 mentions, obfuscation only really prevents people from casually copying your work, but dedicated effort can often still figure it out.  So unless your mod is so good that you expect people to copy it in ways that you don't want, probably not worth the effort.

 

However, obfuscation really just means "make it hard for human to read".  You can actually manually obfuscate with just a couple hours work if you really wanted to:

- delete all comments

- find and replace all class, field and method names with something "random"

 

That goes a long way to preventing someone quickly copying your code.  The downside to this is that it takes a bit of time, and you'd have to do it every time you update your mod so you'd really only want to do it if your mod was finished and unlikely to need regular updates.

Check out my tutorials here: http://jabelarminecraft.blogspot.com/

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    • it worked now. but is therre n outer way to use essential and forggematica?
    • Maybe a conflict with essential - make a test without it
    • ---- Minecraft Crash Report ---- // I let you down. Sorry Time: 6/21/25 5:53 PM Description: Initializing game org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered     at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:392) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:250) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at org.spongepowered.asm.service.modlauncher.MixinTransformationHandler.processClass(MixinTransformationHandler.java:131) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at org.spongepowered.asm.launch.MixinLaunchPluginLegacy.processClass(MixinLaunchPluginLegacy.java:131) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at cpw.mods.modlauncher.serviceapi.ILaunchPluginService.processClassWithFlags(ILaunchPluginService.java:154) ~[modlauncher-8.0.9.jar:8.0.9+86+master.3cf110c] {}     at cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:85) ~[modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120) ~[modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.TransformingClassLoader$DelegatedClassLoader.findClass(TransformingClassLoader.java:265) ~[modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:136) ~[modlauncher-8.0.9.jar:?] {re:classloading,re:classloading,re:classloading}     at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:98) ~[modlauncher-8.0.9.jar:?] {re:classloading,re:classloading,re:classloading}     at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51] {}     at gg.essential.network.connectionmanager.ConnectionManager.<init>(ConnectionManager.java:212) ~[?:?] {re:mixin,re:classloading}     at gg.essential.Essential.<init>(Essential.java:139) ~[?:?] {re:mixin,re:classloading}     at gg.essential.Essential.getInstance(Essential.java:168) ~[?:?] {re:mixin,re:classloading}     at gg.essential.mixins.impl.client.MinecraftHook.preinit(MinecraftHook.java:39) ~[?:?] {re:mixin,re:classloading}     at net.minecraft.client.Minecraft.handler$zgd000$preinit(Minecraft.java:4603) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:forgematica.mixins.json:MixinMinecraftClient,pl:mixin:APP:mafglib.mixins.json:MixinMinecraftClient,pl:mixin:APP:mixins.essential.json:client.Mixin_IncreaseMenuFpsLimit,pl:mixin:APP:mixins.essential.json:client.Mixin_RunEssentialTasks,pl:mixin:APP:mixins.essential.json:client.MixinMinecraft,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_FixKeybindUnpressedInEmoteWheel,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_RecalculateMenuScale,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_UpdateWindowTitle_AddSPSTitle,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_UpdateWindowTitle_DisplayScreen,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_UpdateWindowTitle_LoadWorld,pl:mixin:APP:mixins.essential.json:compatibility.forge.Mixin_FixInternalByteBufAccess,pl:mixin:APP:mixins.essential.json:compatibility.forge.Mixin_FixPrematureByteBufFree,pl:mixin:APP:mixins.essential.json:events.Mixin_RenderTickEvent,pl:mixin:APP:mixins.essential.json:events.Mixin_RenderTickEvent_Final,pl:mixin:APP:abnormals_core.mixins.json:client.MinecraftMixin,pl:mixin:APP:kubejs-common.mixins.json:MinecraftMixin,pl:mixin:APP:flywheel.mixins.json:ShaderCloseMixin,pl:mixin:APP:create.mixins.json:WindowResizeMixin,pl:mixin:A,pl:runtimedistcleaner:A}     at net.minecraft.client.Minecraft.<init>(Minecraft.java:408) [?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:forgematica.mixins.json:MixinMinecraftClient,pl:mixin:APP:mafglib.mixins.json:MixinMinecraftClient,pl:mixin:APP:mixins.essential.json:client.Mixin_IncreaseMenuFpsLimit,pl:mixin:APP:mixins.essential.json:client.Mixin_RunEssentialTasks,pl:mixin:APP:mixins.essential.json:client.MixinMinecraft,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_FixKeybindUnpressedInEmoteWheel,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_RecalculateMenuScale,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_UpdateWindowTitle_AddSPSTitle,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_UpdateWindowTitle_DisplayScreen,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_UpdateWindowTitle_LoadWorld,pl:mixin:APP:mixins.essential.json:compatibility.forge.Mixin_FixInternalByteBufAccess,pl:mixin:APP:mixins.essential.json:compatibility.forge.Mixin_FixPrematureByteBufFree,pl:mixin:APP:mixins.essential.json:events.Mixin_RenderTickEvent,pl:mixin:APP:mixins.essential.json:events.Mixin_RenderTickEvent_Final,pl:mixin:APP:abnormals_core.mixins.json:client.MinecraftMixin,pl:mixin:APP:kubejs-common.mixins.json:MinecraftMixin,pl:mixin:APP:flywheel.mixins.json:ShaderCloseMixin,pl:mixin:APP:create.mixins.json:WindowResizeMixin,pl:mixin:A,pl:runtimedistcleaner:A}     at net.minecraft.client.main.Main.main(Main.java:149) [?:?] {re:classloading,pl:runtimedistcleaner:A}     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {}     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] {}     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] {}     at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] {}     at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) [forge-1.16.5-36.2.20.jar:36.2] {}     at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$531/1174000532.call(Unknown Source) [forge-1.16.5-36.2.20.jar:36.2] {}     at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {} Caused by: org.spongepowered.asm.mixin.throwables.MixinApplyError: Mixin [mixins.essential.json:server.integrated.MixinIntegratedServer] from phase [DEFAULT] in config [mixins.essential.json] FAILED during APPLY     at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinError(MixinProcessor.java:636) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinApplyError(MixinProcessor.java:588) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:379) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     ... 28 more Caused by: org.spongepowered.asm.mixin.transformer.throwables.InvalidMixinException: Conflicting type cast at offset 4 in synthetic bridge method func_212871_a_(Ljava/lang/Object;)V     at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachUniqueMethod(MixinPreProcessorStandard.java:570) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachMethods(MixinPreProcessorStandard.java:354) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attach(MixinPreProcessorStandard.java:302) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.createContextFor(MixinPreProcessorStandard.java:280) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at org.spongepowered.asm.mixin.transformer.MixinInfo.createContextFor(MixinInfo.java:1288) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {re:classloading}     at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:292) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at org.spongepowered.asm.mixin.transformer.TargetClassContext.apply(TargetClassContext.java:383) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {re:classloading}     at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:365) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {re:classloading}     at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     ... 28 more A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- Head -- Thread: Render thread Stacktrace:     at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:392) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:250) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at org.spongepowered.asm.service.modlauncher.MixinTransformationHandler.processClass(MixinTransformationHandler.java:131) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at org.spongepowered.asm.launch.MixinLaunchPluginLegacy.processClass(MixinLaunchPluginLegacy.java:131) ~[mixin-0.8.4.jar:0.8.4+Jenkins-b308.git-2accda5000f7602229606b39437565542cc6fba4] {}     at cpw.mods.modlauncher.serviceapi.ILaunchPluginService.processClassWithFlags(ILaunchPluginService.java:154) ~[modlauncher-8.0.9.jar:8.0.9+86+master.3cf110c] {}     at cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:85) ~[modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120) ~[modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.TransformingClassLoader$DelegatedClassLoader.findClass(TransformingClassLoader.java:265) ~[modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:136) ~[modlauncher-8.0.9.jar:?] {re:classloading,re:classloading,re:classloading,re:classloading}     at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:98) ~[modlauncher-8.0.9.jar:?] {re:classloading,re:classloading,re:classloading,re:classloading}     at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_51] {}     at gg.essential.network.connectionmanager.ConnectionManager.<init>(ConnectionManager.java:212) ~[?:?] {re:mixin,re:classloading}     at gg.essential.Essential.<init>(Essential.java:139) ~[?:?] {re:mixin,re:classloading}     at gg.essential.Essential.getInstance(Essential.java:168) ~[?:?] {re:mixin,re:classloading}     at gg.essential.mixins.impl.client.MinecraftHook.preinit(MinecraftHook.java:39) ~[?:?] {re:mixin,re:classloading}     at net.minecraft.client.Minecraft.handler$zgd000$preinit(Minecraft.java:4603) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:forgematica.mixins.json:MixinMinecraftClient,pl:mixin:APP:mafglib.mixins.json:MixinMinecraftClient,pl:mixin:APP:mixins.essential.json:client.Mixin_IncreaseMenuFpsLimit,pl:mixin:APP:mixins.essential.json:client.Mixin_RunEssentialTasks,pl:mixin:APP:mixins.essential.json:client.MixinMinecraft,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_FixKeybindUnpressedInEmoteWheel,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_RecalculateMenuScale,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_UpdateWindowTitle_AddSPSTitle,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_UpdateWindowTitle_DisplayScreen,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_UpdateWindowTitle_LoadWorld,pl:mixin:APP:mixins.essential.json:compatibility.forge.Mixin_FixInternalByteBufAccess,pl:mixin:APP:mixins.essential.json:compatibility.forge.Mixin_FixPrematureByteBufFree,pl:mixin:APP:mixins.essential.json:events.Mixin_RenderTickEvent,pl:mixin:APP:mixins.essential.json:events.Mixin_RenderTickEvent_Final,pl:mixin:APP:abnormals_core.mixins.json:client.MinecraftMixin,pl:mixin:APP:kubejs-common.mixins.json:MinecraftMixin,pl:mixin:APP:flywheel.mixins.json:ShaderCloseMixin,pl:mixin:APP:create.mixins.json:WindowResizeMixin,pl:mixin:A,pl:runtimedistcleaner:A}     at net.minecraft.client.Minecraft.<init>(Minecraft.java:408) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:forgematica.mixins.json:MixinMinecraftClient,pl:mixin:APP:mafglib.mixins.json:MixinMinecraftClient,pl:mixin:APP:mixins.essential.json:client.Mixin_IncreaseMenuFpsLimit,pl:mixin:APP:mixins.essential.json:client.Mixin_RunEssentialTasks,pl:mixin:APP:mixins.essential.json:client.MixinMinecraft,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_FixKeybindUnpressedInEmoteWheel,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_RecalculateMenuScale,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_UpdateWindowTitle_AddSPSTitle,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_UpdateWindowTitle_DisplayScreen,pl:mixin:APP:mixins.essential.json:client.gui.Mixin_UpdateWindowTitle_LoadWorld,pl:mixin:APP:mixins.essential.json:compatibility.forge.Mixin_FixInternalByteBufAccess,pl:mixin:APP:mixins.essential.json:compatibility.forge.Mixin_FixPrematureByteBufFree,pl:mixin:APP:mixins.essential.json:events.Mixin_RenderTickEvent,pl:mixin:APP:mixins.essential.json:events.Mixin_RenderTickEvent_Final,pl:mixin:APP:abnormals_core.mixins.json:client.MinecraftMixin,pl:mixin:APP:kubejs-common.mixins.json:MinecraftMixin,pl:mixin:APP:flywheel.mixins.json:ShaderCloseMixin,pl:mixin:APP:create.mixins.json:WindowResizeMixin,pl:mixin:A,pl:runtimedistcleaner:A} -- Initialization -- Details: Stacktrace:     at net.minecraft.client.main.Main.main(Main.java:149) [?:?] {re:classloading,pl:runtimedistcleaner:A}     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {}     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] {}     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] {}     at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] {}     at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) [forge-1.16.5-36.2.20.jar:36.2] {}     at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$531/1174000532.call(Unknown Source) [forge-1.16.5-36.2.20.jar:36.2] {}     at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?] {}     at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {} -- System Details -- Details:     Minecraft Version: 1.16.5     Minecraft Version ID: 1.16.5     Operating System: Windows 10 (amd64) version 10.0     Java Version: 1.8.0_51, Oracle Corporation     Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation     Memory: 1117332648 bytes (1065 MB) / 3684696064 bytes (3514 MB) up to 9335996416 bytes (8903 MB)     CPUs: 16     JVM Flags: 4 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx10016m -Xms256m     Launched Version: forge-36.2.20     Backend library: LWJGL version 3.2.2 build 10     Backend API: NO CONTEXT     GL Caps:      Using VBOs: Yes     Is Modded: Definitely; Client brand changed to 'forge'     Type: Client (map_client.txt)     CPU: <unknown>
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