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unity-dumper

★ 52 Open GitHub ↗

Internal dumper for Unity compatible with Il2cpp games.

// repository documentation

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## Note: This project is no longer maintained, I have no idea if it'll still work or not..

# Memity!
An internal dumper for eliminating the need for offsets in games using the Il2cpp backend or optionally dumping offsets to be used in an external cheat.
No need to tinker with Unity metadata files, everything is processed at runtime.

# How do I use it?

First, initalize the api used by Memity and create a Dumper object. (You can initalize it on the heap or stack if you'd prefer).
```cpp
api::init();
const auto game = std::make_unique<Dumper>(new Dumper());
```
All subsequent calls on any dumper classes **will** fail if the api is not initalized.
Memity needs to resolve the exports from Il2cpp.

### Retrieving class types from images
Before dumping Il2CppClasses classes, you first have to get the image associated with the class. Afterwards, you can retrieve the Il2CppClass.
```cpp
const auto image = game->get_image("Assembly-CSharp.dll");
const auto base_player = image->get_class("BasePlayer");
```
### Modifying fields
When you get the field of a function, it returns a void pointer, leaving it up to the programmer to decide what to do with it.
```cpp
// Class functions
const auto position = reinterpret_cast<Vector3*>(
	base_player->get_field("Position")
);

position->x = 5.0;
position->y = 3.0;
position->z = 2.0;
```
## Dumping offsets
Below is an example of how one could dump offsets to be used in an external application.

```cpp
#include <cstdint>
#include <src/dumper/dumper.hpp> // different for where you decide to include your files

// code somewhere..
void dump() 
{
	// Initalize our API if it isn't already
	api::init();
	
	// Passing false since we won't be using the global class table
	const auto dumper = std::make_unique<Dumper>(new Dumper(false));

for (const auto image : dumper->get_images())
	{
		printf("[memity] current image: %s (0x%llx)\n", image->get_name(), static_cast< void* >(image));
		for (const auto object : image->get_classes())
		{
			const auto klass = static_cast< Class* >(object); // Cast from void* to our custom Il2CppClass implementation
			if (klass)
			{
				printf("\t[memity] dumping class %s (0x%llx)\n", klass->get_name(), static_cast< void* >(klass));
				for (const auto field : klass->get_fields())
				{
					if (field)
						printf("\t\t[memity] field %s dumped at offset 0x%x\n", api::get_field_name(field), klass->get_field_offset(api::get_field_name(field)));
				}
			}
		}
	}
}
```
## Rust example
![Rust BasePlayer dump](https://raw.githubusercontent.com/absceptual/unity-dumper/main/dump.PNG "Rust BasePlayer dump")

### Other necessary information
- When getting classes from an image, the dumper does not include templated classes such as ListDictionaries.
- If you would like to get a class inside of a class, use the ``Class::get_nested_type(const char* name)`` method. Make sure the class is pointing to a valid class type.
- I plan to add functionality to automatically dump information and format it into a proper header file, if you'd like to add that functionality feel free to make a pull request.
- This is my first real "release" of something, constructive critism is appreciated. Additionally, ``api.hpp`` contains some useful il2cpp exports if you'd like to fiddle around with it yourself.

unity-dumper

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