Jint VS dnSpy

Jint https://github.com/sebastienros/jint

There are quite a lot of ways to run scripting languages in C#. I've no idea what JSR223 is but .NET has DLR for example. There are also multiple libraries: IronPython, NLua, Jint and Jurassic for Javascript. There's also older version of CS-Script working with .NET Framework.

You can. Embeding lua is a trivial task, and I'm reasonably sure there even are plug-and-play solutions for that, and for JS there's JINT.

I personally use Jint (a multi-platform Javascript interpreter) since Roslyn is not available on mobile. It basically has the same kind of functionality as Roslyn, but it's JS. JS is well-known and accessible to everybody, but Roslyn might be faster since there's no double indirection when interpreting the script. It also depends on what language your users are comfortable with or could learn easily.

Ah yeah, I looked into it more and decompiled the game to find that it appears they're using Jint to interpret the Javascript, and from testing with someone's REPL BBS server I can find that it's a pretty well isolated environment. Only ways around it I can think of are by exploiting some vulnerability in the sandbox to do external requests, modding the game itself to update the api, or running a parallel server to do some janky communication through the save state data.

We used https://github.com/sebastienros/jint for scripting, it's ES5 JS implementation.

Jint is a JS interpreter with an integrated engine built in C#, like V8, he is responsible for all the base code execution as well as EcmaScript implementations such as default constructors, syntax, Promises... I studied its features in depth to start and it was a bit hard (in the beginning).

MelonRuntime is based on Jint, a JavaScript interpreter created by Sébastien Ros, software developer in the ASP.NET team at Microsoft. Melon works from bindings and functionalities injected into this interpreter together with external typing (provided by another package that comes with the default project generated by the command npx melon new) and built-in tools.

Protip: Use a debugger like dnSpy or Visual studio to trace the source of error, by stepping the program line by line. You can restart with dnSpy attached.

Download dnSpy, Open the file "assembly_valheim.dll", Select view and then Assembly Explorer, search for DLCMan class (if you have trouble there is a search tool in the top bar, doing so you'll find the whole class), went to the correct lines (50, 79, 97 even if for me it was actually 98), right click on edit method/class (might be better to use method) and change the " return false; " to " return true; ". After the process compile again and there you have it.

To inspect the code, I recommend dnSpy. https://github.com/dnSpy/dnSpy You want to run it on the Assembly-CSharp.dll file from _Data/Managed. Then you can view the source code. I searched the entire project for the word "pause" until I found something that looked relevant. Luckily, the code for this game is pretty well written and well laid out.

It's dnSpy.

Great question! The tool I used, DNSpy, has the ability to patch in opcodes. So I just put in the instructions needed as essentially assembly, and I did so by just writing bytes into the existing executable. The two I used were ldc.i4 to put an integer onto the stack, and then mul to multiply it with the existing value.

.NET is super easy to reverse, you don't need Ghidra, go try dnSpy, that should do the trick.

Code Creation. Unfortunately, I don't have more information on the code of the game. This is the part I need help with. I'm quite familiar with HTML, CSS, and Javascript, but haven't really touched C#. The best that I've managed is opening Kitchen.Common.dll and KitchenMode.dll in dnSpy (https://github.com/dnSpy/dnSpy) and looking at the class and struct names, recognizing that some of the contents of those dll files which start with C, like CAppliance, are components of entities in the game, and can be used to retrieve entities somehow. I have no idea how to use the classes, like GrabItems or CreateNewMesses. Who knows if either of those do anything? Oh, and making an item or appliance? No idea.