PoC using dev branch of LibCpp2Il

README.md

@@ -1,13 +1,19 @@
 protodec
 ========
-A tool to decompile protobuf classes compiled by [protoc](https://github.com/protocolbuffers/protobuf), from CIL assemblies back into .proto definitions.
+A tool to decompile protobuf classes compiled by [protoc](https://github.com/protocolbuffers/protobuf), from il2cpp compiled CIL assemblies back into .proto definitions.
+
+This branch was created as a proof-of-concept using [the development branch of LibCpp2Il](https://github.com/SamboyCoding/Cpp2IL/tree/development/LibCpp2IL) to parse the game assembly and metadata directly, without the intermediate step of generating dummy DLLs.
+
+I offer no guarantees that this branch functions 1:1 with master, it may explode.
 
 Usage
 -----
 ```
-Usage: protodec(.exe) <target_assembly_path> <out_path> [options]
+Usage: protodec(.exe) <game_assembly_path> <global_metadata_path> <unity_version> <out_path> [options]
 Arguments:
-  target_assembly_path  Either the path to the target assembly or a directory of assemblies, all of which be parsed.
+  game_assembly_path    The path to the game assembly DLL.
+  global_metadata_path  The path to the global-metadata.dat file.
+  unity_version         The version of Unity which was used to create the metadata file or alternatively, the path to the globalgamemanagers or the data.unity3d file.
   out_path              An existing directory to output into individual files, otherwise output to a single file.
 Options:
   --parse_service_servers                                     Parses gRPC service definitions from server classes.
@@ -21,8 +27,9 @@ Limitations
 -----------
 - Integers are assumed to be (u)int32/64 as CIL doesn't differentiate between them and sint32/64 and (s)fixed32/64.
 - Package names are not preserved in protobuf compilation so naturally we cannot recover them during decompilation, which may result in naming conflicts.
-- When decompiling from [Il2CppDumper](https://github.com/Perfare/Il2CppDumper) DummyDLLs
+- Due to the development branch of Cpp2Il not yet recovering method bodies
-    - The `Name` parameter of `OriginalNameAttribute` is not dumped. In this case, the CIL enum field names are used after conforming them to protobuf conventions
+    - The `Name` parameter of `OriginalNameAttribute` is not parsed. In this case, the CIL enum field names are used after conforming them to protobuf conventions.
+    - The `Tool` parameter of `GeneratedCodeAttribute` is not compared against when parsing gRPC service methods, which may cause false positives in the event that another tool has generated methods in the service class.
 
 License
 -------

protodec.sln

@@ -12,6 +12,10 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		README.md = README.md
 	EndProjectSection
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "LibCpp2IL", "..\Cpp2IL\LibCpp2IL\LibCpp2IL.csproj", "{42B987D9-E551-48BC-A821-F7411C664ECC}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WasmDisassembler", "..\Cpp2IL\WasmDisassembler\WasmDisassembler.csproj", "{07C0845C-7579-43C0-B4C9-4769573F3A24}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -26,6 +30,14 @@ Global
 		{5F6DAD82-D9AD-4CE5-86E6-D20C9F059A4D}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{5F6DAD82-D9AD-4CE5-86E6-D20C9F059A4D}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{5F6DAD82-D9AD-4CE5-86E6-D20C9F059A4D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{42B987D9-E551-48BC-A821-F7411C664ECC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{42B987D9-E551-48BC-A821-F7411C664ECC}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{42B987D9-E551-48BC-A821-F7411C664ECC}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{42B987D9-E551-48BC-A821-F7411C664ECC}.Release|Any CPU.Build.0 = Release|Any CPU
+		{07C0845C-7579-43C0-B4C9-4769573F3A24}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{07C0845C-7579-43C0-B4C9-4769573F3A24}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{07C0845C-7579-43C0-B4C9-4769573F3A24}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{07C0845C-7579-43C0-B4C9-4769573F3A24}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

src/LibProtodec/AssemblyInspector.cs

@@ -1,91 +0,0 @@
-// Copyright © 2023-2024 Xpl0itR
-// 
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this
-// file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Reflection;
-
-namespace LibProtodec;
-
-public sealed class AssemblyInspector : IDisposable
-{
-    public readonly MetadataLoadContext AssemblyContext;
-    public readonly IReadOnlyList<Type> LoadedTypes;
-
-    public AssemblyInspector(string assemblyPath)
-    {
-        bool   isFile      = File.Exists(assemblyPath);
-        string assemblyDir = isFile
-            ? Path.GetDirectoryName(assemblyPath)!
-            : assemblyPath;
-
-        PermissiveAssemblyResolver assemblyResolver = new(
-            Directory.EnumerateFiles(assemblyDir, searchPattern: "*.dll"));
-
-        AssemblyContext = new MetadataLoadContext(assemblyResolver);
-        LoadedTypes     = isFile
-            ? AssemblyContext.LoadFromAssemblyPath(assemblyPath).GetTypes()
-            : assemblyResolver.AssemblyPathLookup.Values.SelectMany(path => AssemblyContext.LoadFromAssemblyPath(path).GetTypes()).ToList();
-    }
-
-    public IEnumerable<Type> GetProtobufMessageTypes()
-    {
-        Type? iMessage = LoadedTypes.SingleOrDefault(static type => type?.FullName == "Google.Protobuf.IMessage", null)
-                      ?? AssemblyContext.LoadFromAssemblyName("Google.Protobuf")
-                                        .GetType("Google.Protobuf.IMessage");
-
-        return LoadedTypes.Where(
-            type => type is { IsNested: false, IsSealed: true }
-                 && type.Namespace?.StartsWith("Google.Protobuf", StringComparison.Ordinal) != true
-                 && type.IsAssignableTo(iMessage));
-    }
-
-    public IEnumerable<Type> GetProtobufServiceClientTypes()
-    {
-        Type? clientBase = LoadedTypes.SingleOrDefault(static type => type?.FullName == "Grpc.Core.ClientBase", null)
-                        ?? AssemblyContext.LoadFromAssemblyName("Grpc.Core.Api")
-                                          .GetType("Grpc.Core.ClientBase");
-
-        return LoadedTypes.Where(
-            type => type is { IsNested: true, IsAbstract: false }
-                 && type.IsAssignableTo(clientBase));
-    }
-
-    public IEnumerable<Type> GetProtobufServiceServerTypes()
-    {
-        Type? bindServiceMethodAttribute = LoadedTypes.SingleOrDefault(static type => type?.FullName == "Grpc.Core.BindServiceMethodAttribute", null)
-                                        ?? AssemblyContext.LoadFromAssemblyName("Grpc.Core.Api")
-                                                          .GetType("Grpc.Core.BindServiceMethodAttribute");
-
-        return LoadedTypes.Where(
-            type => type is { IsNested: true, IsAbstract: true, DeclaringType: { IsNested: false, IsSealed: true, IsAbstract: true } }
-                 && type.GetCustomAttributesData().Any(attribute => attribute.AttributeType == bindServiceMethodAttribute));
-    }
-
-    public void Dispose() =>
-        AssemblyContext.Dispose();
-
-    /// <summary>
-    ///     An assembly resolver that uses paths to every assembly that may be loaded.
-    ///     The file name is expected to be the same as the assembly's simple name (casing ignored).
-    ///     PublicKeyToken, Version and CultureName are ignored.
-    /// </summary>
-    private sealed class PermissiveAssemblyResolver(IEnumerable<string> assemblyPaths) : MetadataAssemblyResolver
-    {
-        public readonly IReadOnlyDictionary<string, string> AssemblyPathLookup =
-            assemblyPaths.ToDictionary(
-                static path => Path.GetFileNameWithoutExtension(path),
-                StringComparer.OrdinalIgnoreCase);
-
-        /// <inheritdoc />
-        public override Assembly? Resolve(MetadataLoadContext mlc, AssemblyName assemblyName) =>
-            AssemblyPathLookup.TryGetValue(assemblyName.Name!, out string? assemblyPath)
-                ? mlc.LoadFromAssemblyPath(assemblyPath)
-                : null;
-    }
-}

src/LibProtodec/LibProtodec.csproj

@@ -18,9 +18,10 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\..\..\Cpp2IL\LibCpp2IL\LibCpp2IL.csproj" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
     <PackageReference Include="System.Reflection.MetadataLoadContext" Version="8.0.0" />
-    <PackageReference Include="Xpl0itR.SystemEx" Version="1.1.0" />
+    <PackageReference Include="Xpl0itR.SystemEx" Version="1.2.0" />
   </ItemGroup>
 
 </Project>

src/LibProtodec/Loaders/ClrAssemblyLoader.cs

@@ -0,0 +1,112 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using CommunityToolkit.Diagnostics;
+using LibProtodec.Models.Cil;
+using LibProtodec.Models.Cil.Clr;
+
+namespace LibProtodec.Loaders;
+
+public sealed class ClrAssemblyLoader : ICilAssemblyLoader
+{
+    public readonly MetadataLoadContext LoadContext;
+
+    public ClrAssemblyLoader(string assemblyPath)
+    {
+        bool isFile = File.Exists(assemblyPath);
+        string assemblyDir = isFile
+            ? Path.GetDirectoryName(assemblyPath)!
+            : assemblyPath;
+
+        PermissiveAssemblyResolver assemblyResolver = new(
+            Directory.EnumerateFiles(assemblyDir, searchPattern: "*.dll"));
+
+        LoadContext = new MetadataLoadContext(assemblyResolver);
+        LoadedTypes = isFile
+            ? LoadContext.LoadFromAssemblyPath(assemblyPath)
+                         .GetTypes()
+                         .Select(ClrType.GetOrCreate)
+                         .ToList()
+            : assemblyResolver.AssemblyPathLookup.Values
+                              .SelectMany(path => LoadContext.LoadFromAssemblyPath(path).GetTypes())
+                              .Select(ClrType.GetOrCreate)
+                              .ToList();
+    }
+
+    public IReadOnlyList<ICilType> LoadedTypes { get; }
+
+    public ICilType IMessage
+    {
+        get
+        {
+            ICilType? iMessage = LoadedTypes.SingleOrDefault(static type => type?.FullName == "Google.Protobuf.IMessage", null);
+            if (iMessage is not null)
+                return iMessage;
+
+            Type? iMessageType = LoadContext.LoadFromAssemblyName("Google.Protobuf").GetType("Google.Protobuf.IMessage");
+            Guard.IsNotNull(iMessageType);
+
+            return ClrType.GetOrCreate(iMessageType);
+        }
+    }
+
+    public ICilType ClientBase
+    {
+        get
+        {
+            ICilType? clientBase = LoadedTypes.SingleOrDefault(static type => type?.FullName == "Grpc.Core.ClientBase", null);
+            if (clientBase is not null)
+                return clientBase;
+
+            Type? clientBaseType = LoadContext.LoadFromAssemblyName("Grpc.Core.Api").GetType("Grpc.Core.ClientBase");
+            Guard.IsNotNull(clientBaseType);
+
+            return ClrType.GetOrCreate(clientBaseType);
+        }
+    }
+
+    public ICilType BindServiceMethodAttribute
+    {
+        get
+        {
+            ICilType? attribute = LoadedTypes.SingleOrDefault(static type => type?.FullName == "Grpc.Core.BindServiceMethodAttribute", null);
+            if (attribute is not null)
+                return attribute;
+
+            Type? attributeType = LoadContext.LoadFromAssemblyName("Grpc.Core.Api").GetType("Grpc.Core.BindServiceMethodAttribute");
+            Guard.IsNotNull(attributeType);
+
+            return ClrType.GetOrCreate(attributeType);
+        }
+    }
+
+    public void Dispose() =>
+        LoadContext.Dispose();
+
+    /// <summary>
+    ///     An assembly resolver that uses paths to every assembly that may be loaded.
+    ///     The file name is expected to be the same as the assembly's simple name (casing ignored).
+    ///     PublicKeyToken, Version and CultureName are ignored.
+    /// </summary>
+    private sealed class PermissiveAssemblyResolver(IEnumerable<string> assemblyPaths) : MetadataAssemblyResolver
+    {
+        public readonly IReadOnlyDictionary<string, string> AssemblyPathLookup =
+            assemblyPaths.ToDictionary(
+                static path => Path.GetFileNameWithoutExtension(path),
+                StringComparer.OrdinalIgnoreCase);
+
+        /// <inheritdoc />
+        public override Assembly? Resolve(MetadataLoadContext mlc, AssemblyName assemblyName) =>
+            AssemblyPathLookup.TryGetValue(assemblyName.Name!, out string? assemblyPath)
+                ? mlc.LoadFromAssemblyPath(assemblyPath)
+                : null;
+    }
+}

src/LibProtodec/Loaders/ICilAssemblyLoader.cs

@@ -0,0 +1,23 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System;
+using System.Collections.Generic;
+using LibProtodec.Models.Cil;
+
+namespace LibProtodec.Loaders;
+
+public interface ICilAssemblyLoader : IDisposable
+{
+    IReadOnlyList<ICilType> LoadedTypes { get; }
+
+    // ReSharper disable once InconsistentNaming
+    ICilType IMessage { get; }
+
+    ICilType ClientBase { get; }
+
+    ICilType BindServiceMethodAttribute { get; }
+}

src/LibProtodec/Loaders/Il2CppAssemblyLoader.cs

@@ -0,0 +1,66 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System.Collections.Generic;
+using System.Linq;
+using AssetRipper.Primitives;
+using CommunityToolkit.Diagnostics;
+using LibCpp2IL;
+using LibCpp2IL.Metadata;
+using LibCpp2IL.Reflection;
+using LibProtodec.Models.Cil;
+using LibProtodec.Models.Cil.Il2Cpp;
+
+namespace LibProtodec.Loaders;
+
+public sealed class Il2CppAssemblyLoader : ICilAssemblyLoader
+{
+    public Il2CppAssemblyLoader(string assemblyPath, string metadataPath, UnityVersion unityVersion)
+    {
+        if (!LibCpp2IlMain.LoadFromFile(assemblyPath, metadataPath, unityVersion))
+            ThrowHelper.ThrowInvalidDataException("Failed to load il2cpp assembly!");
+
+        LoadedTypes = LibCpp2IlMain.TheMetadata!.typeDefs.Select(Il2CppType.GetOrCreate).ToList();
+    }
+
+    public IReadOnlyList<ICilType> LoadedTypes { get; }
+
+    public ICilType IMessage
+    {
+        get
+        {
+            Il2CppTypeDefinition? iMessage = LibCpp2IlReflection.GetTypeByFullName("Google.Protobuf.IMessage");
+            Guard.IsNotNull(iMessage);
+
+            return Il2CppType.GetOrCreate(iMessage);
+        }
+    }
+
+    public ICilType ClientBase
+    {
+        get
+        {
+            Il2CppTypeDefinition? clientBase = LibCpp2IlReflection.GetTypeByFullName("Grpc.Core.ClientBase");
+            Guard.IsNotNull(clientBase);
+
+            return Il2CppType.GetOrCreate(clientBase);
+        }
+    }
+
+    public ICilType BindServiceMethodAttribute
+    {
+        get
+        {
+            Il2CppTypeDefinition? attribute = LibCpp2IlReflection.GetTypeByFullName("Grpc.Core.BindServiceMethodAttribute");
+            Guard.IsNotNull(attribute);
+
+            return Il2CppType.GetOrCreate(attribute);
+        }
+    }
+
+    public void Dispose() =>
+        LibCpp2IlMain.Reset();
+}

src/LibProtodec/Models/Cil/Clr/ClrAttribute.cs

@@ -0,0 +1,42 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+
+namespace LibProtodec.Models.Cil.Clr;
+
+public sealed class ClrAttribute(CustomAttributeData clrAttribute) : ICilAttribute
+{
+    private IList<object?>? _constructorArguments;
+
+    public ICilType Type =>
+        ClrType.GetOrCreate(clrAttribute.AttributeType);
+
+    public IList<object?> ConstructorArguments
+    {
+        get
+        {
+            if (_constructorArguments is null)
+            {
+                IList<CustomAttributeTypedArgument> args = clrAttribute.ConstructorArguments;
+
+                if (args.Count < 1)
+                {
+                    _constructorArguments = Array.Empty<object>();
+                }
+                else
+                {
+                    _constructorArguments = args.Select(static arg => arg.Value).ToList();
+                }
+            }
+
+            return _constructorArguments;
+        }
+    }
+}

src/LibProtodec/Models/Cil/Clr/ClrField.cs

@@ -0,0 +1,24 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System.Reflection;
+
+namespace LibProtodec.Models.Cil.Clr;
+
+public sealed class ClrField(FieldInfo clrField) : ClrMember(clrField), ICilField
+{
+    public object? ConstantValue =>
+        clrField.GetRawConstantValue();
+
+    public bool IsLiteral =>
+        clrField.IsLiteral;
+
+    public bool IsPublic =>
+        clrField.IsPublic;
+
+    public bool IsStatic =>
+        clrField.IsStatic;
+}

src/LibProtodec/Models/Cil/Clr/ClrMember.cs

@@ -0,0 +1,33 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System.Collections.Generic;
+using System.Reflection;
+
+namespace LibProtodec.Models.Cil.Clr;
+
+public abstract class ClrMember(MemberInfo clrMember)
+{
+    public string Name =>
+        clrMember.Name;
+
+    public bool IsInherited =>
+        clrMember.DeclaringType != clrMember.ReflectedType;
+
+    public ICilType? DeclaringType =>
+        clrMember.DeclaringType is null
+            ? null
+            : ClrType.GetOrCreate(
+                clrMember.DeclaringType);
+
+    public IEnumerable<ICilAttribute> GetCustomAttributes()
+    {
+        foreach (CustomAttributeData attribute in clrMember.GetCustomAttributesData())
+        {
+            yield return new ClrAttribute(attribute);
+        }
+    }
+}

src/LibProtodec/Models/Cil/Clr/ClrMethod.cs

@@ -0,0 +1,34 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System.Collections.Generic;
+using System.Reflection;
+
+namespace LibProtodec.Models.Cil.Clr;
+
+public sealed class ClrMethod(MethodInfo clrMethod) : ClrMember(clrMethod), ICilMethod
+{
+    public bool IsPublic =>
+        clrMethod.IsPublic;
+
+    public bool IsStatic =>
+        clrMethod.IsStatic;
+
+    public bool IsVirtual =>
+        clrMethod.IsVirtual;
+
+    public ICilType ReturnType =>
+        ClrType.GetOrCreate(clrMethod.ReturnType);
+
+    public IEnumerable<ICilType> GetParameterTypes()
+    {
+        foreach (ParameterInfo parameter in clrMethod.GetParameters())
+        {
+            yield return ClrType.GetOrCreate(
+                parameter.ParameterType);
+        }
+    }
+}

src/LibProtodec/Models/Cil/Clr/ClrProperty.cs

@@ -0,0 +1,32 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System.Reflection;
+
+namespace LibProtodec.Models.Cil.Clr;
+
+public sealed class ClrProperty(PropertyInfo clrProperty) : ClrMember(clrProperty), ICilProperty
+{
+    public ICilType Type =>
+        ClrType.GetOrCreate(
+            clrProperty.PropertyType);
+
+    public bool CanRead =>
+        clrProperty.CanRead;
+
+    public bool CanWrite =>
+        clrProperty.CanWrite;
+
+    public ICilMethod? Getter =>
+        CanRead
+            ? new ClrMethod(clrProperty.GetMethod!)
+            : null;
+
+    public ICilMethod? Setter =>
+        CanWrite
+            ? new ClrMethod(clrProperty.SetMethod!)
+            : null;
+}

src/LibProtodec/Models/Cil/Clr/ClrType.cs

@@ -0,0 +1,129 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using CommunityToolkit.Diagnostics;
+
+namespace LibProtodec.Models.Cil.Clr;
+
+public sealed class ClrType : ClrMember, ICilType
+{
+    private const BindingFlags Everything = BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Static | BindingFlags.Instance;
+
+    private readonly Type _clrType;
+    private IList<ICilType>? _genericTypeArguments;
+
+    private ClrType(Type clrType) : base(clrType) =>
+        _clrType = clrType;
+
+    public string FullName =>
+        _clrType.FullName ?? _clrType.Name;
+
+    public string? Namespace =>
+        _clrType.Namespace;
+
+    public string DeclaringAssemblyName =>
+        _clrType.Assembly.FullName
+     ?? ThrowHelper.ThrowArgumentNullException<string>(
+            nameof(_clrType.Assembly.FullName));
+
+    public ICilType? BaseType =>
+        _clrType.BaseType is null
+            ? null
+            : GetOrCreate(_clrType.BaseType);
+
+    public bool IsAbstract =>
+        _clrType.IsAbstract;
+
+    public bool IsClass =>
+        _clrType.IsClass;
+
+    public bool IsEnum =>
+        _clrType.IsEnum;
+
+    public bool IsNested =>
+        _clrType.IsNested;
+
+    public bool IsSealed =>
+        _clrType.IsSealed;
+
+    public IList<ICilType> GenericTypeArguments
+    {
+        get
+        {
+            if (_genericTypeArguments is null)
+            {
+                Type[] args = _clrType.GenericTypeArguments;
+
+                if (args.Length < 1)
+                {
+                    _genericTypeArguments = Array.Empty<ICilType>();
+                }
+                else
+                {
+                    _genericTypeArguments = args.Select(GetOrCreate).ToList();
+                }
+            }
+
+            return _genericTypeArguments;
+        }
+    }
+
+    public IEnumerable<ICilField> GetFields()
+    {
+        foreach (FieldInfo field in _clrType.GetFields(Everything))
+        {
+            yield return new ClrField(field);
+        }
+    }
+
+    public IEnumerable<ICilMethod> GetMethods()
+    {
+        foreach (MethodInfo method in _clrType.GetMethods(Everything))
+        {
+            yield return new ClrMethod(method);
+        }
+    }
+
+    public IEnumerable<ICilType> GetNestedTypes()
+    {
+        foreach (Type type in _clrType.GetNestedTypes(Everything))
+        {
+            yield return GetOrCreate(type);
+        }
+    }
+
+    public IEnumerable<ICilProperty> GetProperties()
+    {
+        foreach (PropertyInfo property in _clrType.GetProperties(Everything))
+        {
+            yield return new ClrProperty(property);
+        }
+    }
+
+    public bool IsAssignableTo(ICilType type)
+    {
+        if (type is ClrType clrType)
+        {
+            return _clrType.IsAssignableTo(clrType._clrType);
+        }
+
+        return ThrowHelper.ThrowNotSupportedException<bool>();
+    }
+
+
+    private static readonly ConcurrentDictionary<string, ClrType> TypeLookup = [];
+
+    public static ICilType GetOrCreate(Type clrType) =>
+        TypeLookup.GetOrAdd(
+            clrType.FullName ?? clrType.Name,
+            static (_, clrType) => new ClrType(clrType),
+            clrType);
+}

src/LibProtodec/Models/Cil/ICilAttribute.cs

@@ -0,0 +1,16 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System.Collections.Generic;
+
+namespace LibProtodec.Models.Cil;
+
+public interface ICilAttribute
+{
+    ICilType Type { get; }
+
+    IList<object?> ConstructorArguments { get; }
+}

src/LibProtodec/Models/Cil/ICilField.cs

@@ -0,0 +1,22 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System.Collections.Generic;
+
+namespace LibProtodec.Models.Cil;
+
+public interface ICilField
+{
+    string Name { get; }
+
+    object? ConstantValue { get; }
+
+    bool IsLiteral { get; }
+    bool IsPublic  { get; }
+    bool IsStatic  { get; }
+
+    IEnumerable<ICilAttribute> GetCustomAttributes();
+}

src/LibProtodec/Models/Cil/ICilMethod.cs

@@ -0,0 +1,25 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System.Collections.Generic;
+
+namespace LibProtodec.Models.Cil;
+
+public interface ICilMethod
+{
+    string Name { get; }
+
+    bool IsInherited { get; }
+    bool IsPublic    { get; }
+    bool IsStatic    { get; }
+    bool IsVirtual   { get; }
+
+    ICilType ReturnType { get; }
+
+    IEnumerable<ICilAttribute> GetCustomAttributes();
+
+    IEnumerable<ICilType> GetParameterTypes();
+}

src/LibProtodec/Models/Cil/ICilProperty.cs

@@ -0,0 +1,24 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System.Collections.Generic;
+
+namespace LibProtodec.Models.Cil;
+
+public interface ICilProperty
+{
+    string   Name { get; }
+    ICilType Type { get; }
+
+    bool IsInherited { get; }
+    bool CanRead     { get; }
+    bool CanWrite    { get; }
+
+    ICilMethod? Getter { get; }
+    ICilMethod? Setter { get; }
+
+    IEnumerable<ICilAttribute> GetCustomAttributes();
+}

src/LibProtodec/Models/Cil/ICilType.cs

@@ -0,0 +1,40 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System.Collections.Generic;
+
+namespace LibProtodec.Models.Cil;
+
+public interface ICilType
+{
+    string  Name      { get; }
+    string  FullName  { get; }
+    string? Namespace { get; }
+
+    string    DeclaringAssemblyName { get; }
+    ICilType? DeclaringType         { get; }
+    ICilType? BaseType              { get; }
+
+    bool IsAbstract { get; }
+    bool IsClass    { get; }
+    bool IsEnum     { get; }
+    bool IsNested   { get; }
+    bool IsSealed   { get; }
+
+    IList<ICilType> GenericTypeArguments { get; }
+
+    IEnumerable<ICilAttribute> GetCustomAttributes();
+
+    IEnumerable<ICilField> GetFields();
+
+    IEnumerable<ICilMethod> GetMethods();
+
+    IEnumerable<ICilType> GetNestedTypes();
+
+    IEnumerable<ICilProperty> GetProperties();
+
+    bool IsAssignableTo(ICilType type);
+}

src/LibProtodec/Models/Cil/Il2Cpp/Il2CppAttribute.cs

@@ -0,0 +1,20 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System;
+using System.Collections.Generic;
+using LibCpp2IL.Reflection;
+
+namespace LibProtodec.Models.Cil.Il2Cpp;
+
+public sealed class Il2CppAttribute(Il2CppTypeReflectionData il2CppAttrType) : ICilAttribute
+{
+    public ICilType Type =>
+        Il2CppType.GetOrCreate(il2CppAttrType);
+
+    public IList<object?> ConstructorArguments =>
+        throw new NotImplementedException();
+}

src/LibProtodec/Models/Cil/Il2Cpp/Il2CppField.cs

@@ -0,0 +1,40 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System.Reflection;
+using LibCpp2IL.Metadata;
+
+namespace LibProtodec.Models.Cil.Il2Cpp;
+
+public sealed class Il2CppField(Il2CppFieldDefinition il2CppField) : Il2CppMember, ICilField
+{
+    private readonly FieldAttributes _attributes =
+        (FieldAttributes)il2CppField.RawFieldType!.Attrs;
+
+    public string Name =>
+        il2CppField.Name!;
+
+    public object? ConstantValue =>
+        il2CppField.DefaultValue!.Value;
+
+    public bool IsLiteral =>
+        (_attributes & FieldAttributes.Literal) != 0;
+
+    public bool IsPublic =>
+        (_attributes & FieldAttributes.Public) != 0;
+
+    public bool IsStatic =>
+        (_attributes & FieldAttributes.Static) != 0;
+
+    protected override Il2CppImageDefinition DeclaringAssembly =>
+        il2CppField.FieldType!.baseType!.DeclaringAssembly!;
+
+    protected override int CustomAttributeIndex =>
+        il2CppField.customAttributeIndex;
+
+    protected override uint Token =>
+        il2CppField.token;
+}

src/LibProtodec/Models/Cil/Il2Cpp/Il2CppMember.cs

@@ -0,0 +1,47 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System;
+using System.Collections.Generic;
+using LibCpp2IL;
+using LibCpp2IL.Metadata;
+
+namespace LibProtodec.Models.Cil.Il2Cpp;
+
+public abstract class Il2CppMember
+{
+    public IEnumerable<ICilAttribute> GetCustomAttributes()
+    {
+        if (LibCpp2IlMain.MetadataVersion >= 29)
+        {
+            throw new NotImplementedException();
+        }
+
+        Il2CppCustomAttributeTypeRange? attributeTypeRange = LibCpp2IlMain.TheMetadata!.GetCustomAttributeData(
+            DeclaringAssembly, CustomAttributeIndex, Token, out _);
+
+        if (attributeTypeRange is null || attributeTypeRange.count == 0)
+            yield break;
+
+        for (int attrIndex = attributeTypeRange.start,
+                 end = attributeTypeRange.start + attributeTypeRange.count;
+             attrIndex < end;
+             attrIndex++)
+        {
+            int typeIndex = LibCpp2IlMain.TheMetadata.attributeTypes[attrIndex];
+
+            yield return new Il2CppAttribute(
+                LibCpp2ILUtils.GetTypeReflectionData(
+                    LibCpp2IlMain.Binary!.GetType(typeIndex)));
+        }
+    }
+
+    protected abstract Il2CppImageDefinition DeclaringAssembly { get; }
+
+    protected abstract int CustomAttributeIndex { get; }
+
+    protected abstract uint Token { get; }
+}

src/LibProtodec/Models/Cil/Il2Cpp/Il2CppMethod.cs

@@ -0,0 +1,54 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System.Collections.Generic;
+using System.Reflection;
+using LibCpp2IL;
+using LibCpp2IL.Metadata;
+using LibCpp2IL.Reflection;
+
+namespace LibProtodec.Models.Cil.Il2Cpp;
+
+public sealed class Il2CppMethod(Il2CppMethodDefinition il2CppMethod) : Il2CppMember, ICilMethod
+{
+    public string Name =>
+        il2CppMethod.Name!;
+
+    public bool IsInherited =>
+        false;
+
+    public bool IsPublic =>
+        (il2CppMethod.Attributes & MethodAttributes.Public) != 0;
+
+    public bool IsStatic =>
+        (il2CppMethod.Attributes & MethodAttributes.Static) != 0;
+
+    public bool IsVirtual =>
+        (il2CppMethod.Attributes & MethodAttributes.Virtual) != 0;
+
+    public ICilType ReturnType =>
+        Il2CppType.GetOrCreate(
+            LibCpp2ILUtils.GetTypeReflectionData(
+                LibCpp2IlMain.Binary!.GetType(
+                    il2CppMethod.returnTypeIdx)));
+
+    public IEnumerable<ICilType> GetParameterTypes()
+    {
+        foreach (Il2CppParameterReflectionData parameter in il2CppMethod.Parameters!)
+        {
+            yield return Il2CppType.GetOrCreate(parameter.Type);
+        }
+    }
+
+    protected override Il2CppImageDefinition DeclaringAssembly =>
+        il2CppMethod.DeclaringType!.DeclaringAssembly!;
+
+    protected override int CustomAttributeIndex =>
+        il2CppMethod.customAttributeIndex;
+
+    protected override uint Token =>
+        il2CppMethod.token;
+}

src/LibProtodec/Models/Cil/Il2Cpp/Il2CppProperty.cs

@@ -0,0 +1,54 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System.Linq;
+using LibCpp2IL;
+using LibCpp2IL.Metadata;
+
+namespace LibProtodec.Models.Cil.Il2Cpp;
+
+// We take declaring type as a ctor arg because of the nonsensically inefficient way libcpp2il calculates Il2CppPropertyDefinition's DeclaringType property
+public sealed class Il2CppProperty(Il2CppPropertyDefinition il2CppProperty, Il2CppTypeDefinition declaringType) : Il2CppMember, ICilProperty
+{
+    public string Name =>
+        il2CppProperty.Name!;
+
+    public bool IsInherited =>
+        false;
+
+    public bool CanRead =>
+        il2CppProperty.get >= 0;
+
+    public bool CanWrite =>
+        il2CppProperty.set >= 0;
+
+    public ICilMethod? Getter =>
+        CanRead
+            ? new Il2CppMethod(
+                LibCpp2IlMain.TheMetadata!.methodDefs[
+                    declaringType.FirstMethodIdx + il2CppProperty.get])
+            : null;
+
+    public ICilMethod? Setter =>
+        CanWrite
+            ? new Il2CppMethod(
+                LibCpp2IlMain.TheMetadata!.methodDefs[
+                    declaringType.FirstMethodIdx + il2CppProperty.set])
+            : null;
+
+    public ICilType Type =>
+        Getter?.ReturnType
+     ?? Setter!.GetParameterTypes().First();
+
+    protected override Il2CppImageDefinition DeclaringAssembly =>
+        declaringType.DeclaringAssembly!;
+
+    protected override int CustomAttributeIndex =>
+        il2CppProperty.customAttributeIndex;
+
+    protected override uint Token =>
+        il2CppProperty.token;
+}

src/LibProtodec/Models/Cil/Il2Cpp/Il2CppType.cs

@@ -0,0 +1,194 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using CommunityToolkit.Diagnostics;
+using LibCpp2IL;
+using LibCpp2IL.Metadata;
+using LibCpp2IL.Reflection;
+
+namespace LibProtodec.Models.Cil.Il2Cpp;
+
+public sealed class Il2CppType : Il2CppMember, ICilType
+{
+    private readonly Il2CppTypeDefinition _il2CppType;
+    private readonly Il2CppTypeReflectionData[] _genericArgs;
+    private IList<ICilType>? _genericTypeArguments;
+
+    private Il2CppType(Il2CppTypeDefinition il2CppType, Il2CppTypeReflectionData[] genericArgs) =>
+        (_il2CppType, _genericArgs) = (il2CppType, genericArgs);
+
+    public string Name =>
+        _il2CppType.Name!;
+
+    public string FullName =>
+        _il2CppType.FullName!;
+
+    public string? Namespace =>
+        _il2CppType.Namespace;
+
+    public string DeclaringAssemblyName =>
+        LibCpp2IlMain.TheMetadata!.GetStringFromIndex(
+            DeclaringAssembly.nameIndex);
+
+    public ICilType? DeclaringType =>
+        IsNested
+            ? GetOrCreate(
+                LibCpp2ILUtils.GetTypeReflectionData(
+                    LibCpp2IlMain.Binary!.GetType(
+                        _il2CppType.DeclaringTypeIndex)))
+            : null;
+
+    public ICilType? BaseType =>
+        _il2CppType.ParentIndex == -1
+            ? null
+            : GetOrCreate(
+                LibCpp2ILUtils.GetTypeReflectionData(
+                    LibCpp2IlMain.Binary!.GetType(
+                        _il2CppType.ParentIndex)));
+
+    public bool IsAbstract =>
+        _il2CppType.IsAbstract;
+
+    public bool IsClass =>
+        (_il2CppType.Attributes & TypeAttributes.ClassSemanticsMask) == TypeAttributes.Class
+     && !_il2CppType.IsValueType;
+
+    public bool IsEnum =>
+        _il2CppType.IsEnumType;
+
+    public bool IsNested =>
+        _il2CppType.DeclaringTypeIndex >= 0;
+
+    public bool IsSealed =>
+        (_il2CppType.Attributes & TypeAttributes.Sealed) != 0;
+
+    public IList<ICilType> GenericTypeArguments
+    {
+        get
+        {
+            if (_genericTypeArguments is null)
+            {
+                if (_genericArgs.Length < 1)
+                {
+                    _genericTypeArguments = Array.Empty<ICilType>();
+                }
+                else
+                {
+                    _genericTypeArguments = _genericArgs.Select(GetOrCreate).ToList();
+                }
+            }
+
+            return _genericTypeArguments;
+        }
+    }
+
+    public IEnumerable<ICilField> GetFields()
+    {
+        for (int idx = _il2CppType.FirstFieldIdx, end = _il2CppType.FirstFieldIdx + _il2CppType.FieldCount; idx < end; idx++)
+        {
+            yield return new Il2CppField(
+                LibCpp2IlMain.TheMetadata!.fieldDefs[idx]);
+        }
+    }
+
+    public IEnumerable<ICilMethod> GetMethods()
+    {
+        for (int idx = _il2CppType.FirstMethodIdx, end = _il2CppType.FirstMethodIdx + _il2CppType.MethodCount; idx < end; idx++)
+        {
+            yield return new Il2CppMethod(
+                LibCpp2IlMain.TheMetadata!.methodDefs[idx]);
+        }
+    }
+
+    public IEnumerable<ICilType> GetNestedTypes()
+    {
+        for (int idx = _il2CppType.NestedTypesStart, end = _il2CppType.NestedTypesStart + _il2CppType.NestedTypeCount; idx < end; idx++)
+        {
+            yield return GetOrCreate(
+                LibCpp2IlMain.TheMetadata!.typeDefs[
+                    LibCpp2IlMain.TheMetadata.nestedTypeIndices[idx]]);
+        }
+    }
+
+    public IEnumerable<ICilProperty> GetProperties()
+    {
+        for (int idx = _il2CppType.FirstPropertyId, end = _il2CppType.FirstPropertyId + _il2CppType.PropertyCount; idx < end; idx++)
+        {
+            yield return new Il2CppProperty(
+                LibCpp2IlMain.TheMetadata!.propertyDefs[idx],
+                _il2CppType);
+        }
+    }
+
+    public bool IsAssignableTo(ICilType type)
+    {
+        if (type is Il2CppType il2CppType)
+        {
+            return IsAssignableTo(_il2CppType, il2CppType._il2CppType);
+        }
+
+        return ThrowHelper.ThrowNotSupportedException<bool>();
+    }
+
+    protected override Il2CppImageDefinition DeclaringAssembly =>
+        _il2CppType.DeclaringAssembly!;
+
+    protected override int CustomAttributeIndex =>
+        _il2CppType.CustomAttributeIndex;
+
+    protected override uint Token =>
+        _il2CppType.Token;
+
+
+    private static readonly ConcurrentDictionary<string, Il2CppType> TypeLookup = [];
+
+    public static ICilType GetOrCreate(Il2CppTypeDefinition il2CppType) =>
+        TypeLookup.GetOrAdd(
+            il2CppType.FullName!,
+            static (_, il2CppType) =>
+                new Il2CppType(il2CppType, Array.Empty<Il2CppTypeReflectionData>()),
+            il2CppType);
+
+    public static ICilType GetOrCreate(Il2CppTypeReflectionData il2CppTypeData)
+    {
+        Guard.IsTrue(il2CppTypeData.isType);
+
+        return TypeLookup.GetOrAdd(
+            il2CppTypeData.ToString(),
+            static (_, il2CppTypeData) =>
+                new Il2CppType(il2CppTypeData.baseType!, il2CppTypeData.genericParams),
+            il2CppTypeData);
+    }
+
+    private static bool IsAssignableTo(Il2CppTypeDefinition thisType, Il2CppTypeDefinition baseType)
+    {
+        if (baseType.IsInterface)
+        {
+            foreach (Il2CppTypeReflectionData @interface in thisType.Interfaces!)
+            {
+                if (@interface.baseType == baseType)
+                {
+                    return true;
+                }
+            }
+        }
+        
+        if (thisType == baseType)
+        {
+            return true;
+        }
+
+        Il2CppTypeDefinition? thisTypeBaseType = thisType.BaseType?.baseType;
+
+        return thisTypeBaseType is not null
+            && IsAssignableTo(thisTypeBaseType, baseType);
+    }
+}

src/LibProtodec/Models/Protobuf/Fields/EnumField.cs

@@ -4,7 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-namespace LibProtodec.Models.Fields;
+namespace LibProtodec.Models.Protobuf.Fields;
 
 public sealed class EnumField
 {

src/LibProtodec/Models/Protobuf/Fields/MessageField.cs

@@ -5,14 +5,14 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 using System.IO;
-using LibProtodec.Models.TopLevels;
+using LibProtodec.Models.Protobuf.TopLevels;
-using LibProtodec.Models.Types;
+using LibProtodec.Models.Protobuf.Types;
 
-namespace LibProtodec.Models.Fields;
+namespace LibProtodec.Models.Protobuf.Fields;
 
 public sealed class MessageField
 {
-    public required IType  Type { get; init; }
+    public required IProtobufType Type { get; init; }
     public required string        Name { get; init; }
     public required int           Id   { get; init; }
 

src/LibProtodec/Models/Protobuf/Fields/ServiceMethod.cs

@@ -5,16 +5,16 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 using System.CodeDom.Compiler;
-using LibProtodec.Models.TopLevels;
+using LibProtodec.Models.Protobuf.TopLevels;
-using LibProtodec.Models.Types;
+using LibProtodec.Models.Protobuf.Types;
 
-namespace LibProtodec.Models.Fields;
+namespace LibProtodec.Models.Protobuf.Fields;
 
 public sealed class ServiceMethod
 {
     public required string        Name         { get; init; }
-    public required IType  RequestType  { get; init; }
+    public required IProtobufType RequestType  { get; init; }
-    public required IType  ResponseType { get; init; }
+    public required IProtobufType ResponseType { get; init; }
 
     public bool IsRequestStreamed  { get; init; }
     public bool IsResponseStreamed { get; init; }

src/LibProtodec/Models/Protobuf/Protobuf.cs

@@ -8,10 +8,10 @@ using System.CodeDom.Compiler;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
-using LibProtodec.Models.TopLevels;
+using LibProtodec.Models.Protobuf.TopLevels;
-using LibProtodec.Models.Types;
+using LibProtodec.Models.Protobuf.Types;
 
-namespace LibProtodec.Models;
+namespace LibProtodec.Models.Protobuf;
 
 public sealed class Protobuf
 {
@@ -90,7 +90,7 @@ public sealed class Protobuf
         writer.WriteLine(';');
     }
 
-    public static void WriteTypeNameTo(TextWriter writer, IType type, TopLevel topLevel)
+    public static void WriteTypeNameTo(TextWriter writer, IProtobufType type, TopLevel topLevel)
     {
         if (type is TopLevel { Parent: not null } typeTopLevel && typeTopLevel.Parent != topLevel)
         {

src/LibProtodec/Models/Protobuf/TopLevels/Enum.cs

@@ -4,13 +4,13 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-global using Enum = LibProtodec.Models.TopLevels.Enum;
+global using Enum = LibProtodec.Models.Protobuf.TopLevels.Enum;
 using System.CodeDom.Compiler;
 using System.Collections.Generic;
-using LibProtodec.Models.Fields;
+using LibProtodec.Models.Protobuf.Fields;
-using LibProtodec.Models.Types;
+using LibProtodec.Models.Protobuf.Types;
 
-namespace LibProtodec.Models.TopLevels;
+namespace LibProtodec.Models.Protobuf.TopLevels;
 
 public sealed class Enum : TopLevel, INestableType
 {

src/LibProtodec/Models/Protobuf/TopLevels/Message.cs

@@ -7,14 +7,14 @@
 using System.CodeDom.Compiler;
 using System.Collections.Generic;
 using System.Linq;
-using LibProtodec.Models.Fields;
+using LibProtodec.Models.Protobuf.Fields;
-using LibProtodec.Models.Types;
+using LibProtodec.Models.Protobuf.Types;
 
-namespace LibProtodec.Models.TopLevels;
+namespace LibProtodec.Models.Protobuf.TopLevels;
 
 public sealed class Message : TopLevel, INestableType
 {
-    public readonly Dictionary<string, int[]>         OneOfs = [];
+    public readonly Dictionary<string, List<int>>     OneOfs = [];
     public readonly Dictionary<int, MessageField>     Fields = [];
     public readonly Dictionary<string, INestableType> Nested = [];
 
@@ -40,7 +40,7 @@ public sealed class Message : TopLevel, INestableType
             field.WriteTo(writer, this, isOneOf: false);
         }
 
-        foreach ((string name, int[] fieldIds) in OneOfs)
+        foreach ((string name, List<int> fieldIds) in OneOfs)
         {
             // ReSharper disable once StringLiteralTypo
             writer.Write("oneof ");

src/LibProtodec/Models/Protobuf/TopLevels/Service.cs

@@ -6,9 +6,9 @@
 
 using System.CodeDom.Compiler;
 using System.Collections.Generic;
-using LibProtodec.Models.Fields;
+using LibProtodec.Models.Protobuf.Fields;
 
-namespace LibProtodec.Models.TopLevels;
+namespace LibProtodec.Models.Protobuf.TopLevels;
 
 public sealed class Service : TopLevel
 {

src/LibProtodec/Models/Protobuf/TopLevels/TopLevel.cs

@@ -7,7 +7,7 @@
 using System.CodeDom.Compiler;
 using System.Collections.Generic;
 
-namespace LibProtodec.Models.TopLevels;
+namespace LibProtodec.Models.Protobuf.TopLevels;
 
 public abstract class TopLevel
 {

src/LibProtodec/Models/Protobuf/Types/INestableType.cs

@@ -4,9 +4,9 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-namespace LibProtodec.Models.Types;
+namespace LibProtodec.Models.Protobuf.Types;
 
-public interface INestableType : IType
+public interface INestableType : IProtobufType
 {
     Protobuf? Protobuf { get; }
 

src/LibProtodec/Models/Protobuf/Types/IProtobufType.cs

@@ -4,15 +4,9 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-namespace LibProtodec.Models.Types;
+namespace LibProtodec.Models.Protobuf.Types;
 
-public interface IType
+public interface IProtobufType
 {
     string Name { get; }
 }
-
-public sealed class External(string typeName) : IType
-{
-    public string Name =>
-        typeName;
-}

src/LibProtodec/Models/Protobuf/Types/Map.cs

@@ -4,9 +4,9 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-namespace LibProtodec.Models.Types;
+namespace LibProtodec.Models.Protobuf.Types;
 
-public sealed class Map(IType typeKey, IType typeVal) : IType
+public sealed class Map(IProtobufType typeKey, IProtobufType typeVal) : IProtobufType
 {
     public string Name =>
         $"map<{typeKey.Name}, {typeVal.Name}>";

src/LibProtodec/Models/Protobuf/Types/Repeated.cs

@@ -4,9 +4,9 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-namespace LibProtodec.Models.Types;
+namespace LibProtodec.Models.Protobuf.Types;
 
-public sealed class Repeated(IType type) : IType
+public sealed class Repeated(IProtobufType type) : IProtobufType
 {
     public string Name =>
         $"repeated {type.Name}";

src/LibProtodec/Models/Protobuf/Types/Scalar.cs

@@ -0,0 +1,30 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+namespace LibProtodec.Models.Protobuf.Types;
+
+// ReSharper disable StringLiteralTypo
+public sealed class Scalar(string typeName) : IProtobufType
+{
+    public string Name =>
+        typeName;
+
+    public static readonly IProtobufType Bool     = new Scalar("bool");
+    public static readonly IProtobufType Bytes    = new Scalar("bytes");
+    public static readonly IProtobufType Double   = new Scalar("double");
+    public static readonly IProtobufType Fixed32  = new Scalar("fixed32");
+    public static readonly IProtobufType Fixed64  = new Scalar("fixed64");
+    public static readonly IProtobufType Float    = new Scalar("float");
+    public static readonly IProtobufType Int32    = new Scalar("int32");
+    public static readonly IProtobufType Int64    = new Scalar("int64");
+    public static readonly IProtobufType SFixed32 = new Scalar("sfixed32");
+    public static readonly IProtobufType SFixed64 = new Scalar("sfixed64");
+    public static readonly IProtobufType SInt32   = new Scalar("sint32");
+    public static readonly IProtobufType SInt64   = new Scalar("sint64");
+    public static readonly IProtobufType String   = new Scalar("string");
+    public static readonly IProtobufType UInt32   = new Scalar("uint32");
+    public static readonly IProtobufType UInt64   = new Scalar("uint64");
+}

src/LibProtodec/Models/Protobuf/Types/WellKnown.cs

@@ -0,0 +1,45 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+namespace LibProtodec.Models.Protobuf.Types;
+
+public sealed class WellKnown(string typeName, string fileName) : IProtobufType
+{
+    public string Name =>
+        typeName;
+
+    public string FileName =>
+        fileName;
+
+    public static readonly IProtobufType Any           = new WellKnown("google.protobuf.Any",           "google/protobuf/any.proto");
+    public static readonly IProtobufType Api           = new WellKnown("google.protobuf.Api",           "google/protobuf/api.proto");
+    public static readonly IProtobufType BoolValue     = new WellKnown("google.protobuf.BoolValue",     "google/protobuf/wrappers.proto");
+    public static readonly IProtobufType BytesValue    = new WellKnown("google.protobuf.BytesValue",    "google/protobuf/wrappers.proto");
+    public static readonly IProtobufType DoubleValue   = new WellKnown("google.protobuf.DoubleValue",   "google/protobuf/wrappers.proto");
+    public static readonly IProtobufType Duration      = new WellKnown("google.protobuf.Duration",      "google/protobuf/duration.proto");
+    public static readonly IProtobufType Empty         = new WellKnown("google.protobuf.Empty",         "google/protobuf/empty.proto");
+    public static readonly IProtobufType Enum          = new WellKnown("google.protobuf.Enum",          "google/protobuf/type.proto");
+    public static readonly IProtobufType EnumValue     = new WellKnown("google.protobuf.EnumValue",     "google/protobuf/type.proto");
+    public static readonly IProtobufType Field         = new WellKnown("google.protobuf.Field",         "google/protobuf/type.proto");
+    public static readonly IProtobufType FieldMask     = new WellKnown("google.protobuf.FieldMask",     "google/protobuf/field_mask.proto");
+    public static readonly IProtobufType FloatValue    = new WellKnown("google.protobuf.FloatValue",    "google/protobuf/wrappers.proto");
+    public static readonly IProtobufType Int32Value    = new WellKnown("google.protobuf.Int32Value",    "google/protobuf/wrappers.proto");
+    public static readonly IProtobufType Int64Value    = new WellKnown("google.protobuf.Int64Value",    "google/protobuf/wrappers.proto");
+    public static readonly IProtobufType ListValue     = new WellKnown("google.protobuf.ListValue",     "google/protobuf/struct.proto");
+    public static readonly IProtobufType Method        = new WellKnown("google.protobuf.Method",        "google/protobuf/api.proto");
+    public static readonly IProtobufType Mixin         = new WellKnown("google.protobuf.Mixin",         "google/protobuf/api.proto");
+    public static readonly IProtobufType NullValue     = new WellKnown("google.protobuf.NullValue",     "google/protobuf/struct.proto");
+    public static readonly IProtobufType Option        = new WellKnown("google.protobuf.Option",        "google/protobuf/type.proto");
+    public static readonly IProtobufType SourceContext = new WellKnown("google.protobuf.SourceContext", "google/protobuf/source_context.proto");
+    public static readonly IProtobufType StringValue   = new WellKnown("google.protobuf.StringValue",   "google/protobuf/wrappers.proto");
+    public static readonly IProtobufType Struct        = new WellKnown("google.protobuf.Struct",        "google/protobuf/struct.proto");
+    public static readonly IProtobufType Syntax        = new WellKnown("google.protobuf.Syntax",        "google/protobuf/type.proto");
+    public static readonly IProtobufType Timestamp     = new WellKnown("google.protobuf.Timestamp",     "google/protobuf/timestamp.proto");
+    public static readonly IProtobufType Type          = new WellKnown("google.protobuf.Type",          "google/protobuf/type.proto");
+    public static readonly IProtobufType UInt32Value   = new WellKnown("google.protobuf.UInt32Value",   "google/protobuf/wrappers.proto");
+    public static readonly IProtobufType UInt64Value   = new WellKnown("google.protobuf.UInt64Value",   "google/protobuf/wrappers.proto");
+    public static readonly IProtobufType Value         = new WellKnown("google.protobuf.Value",         "google/protobuf/struct.proto");
+}

src/LibProtodec/Models/Types/Scalar.cs

@@ -1,27 +0,0 @@
-// Copyright © 2024 Xpl0itR
-// 
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this
-// file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-namespace LibProtodec.Models.Types;
-
-// ReSharper disable StringLiteralTypo
-public static class Scalar
-{
-    public static readonly IType Bool     = new External("bool");
-    public static readonly IType Bytes    = new External("bytes");
-    public static readonly IType Double   = new External("double");
-    public static readonly IType Fixed32  = new External("fixed32");
-    public static readonly IType Fixed64  = new External("fixed64");
-    public static readonly IType Float    = new External("float");
-    public static readonly IType Int32    = new External("int32");
-    public static readonly IType Int64    = new External("int64");
-    public static readonly IType SFixed32 = new External("sfixed32");
-    public static readonly IType SFixed64 = new External("sfixed64");
-    public static readonly IType SInt32   = new External("sint32");
-    public static readonly IType SInt64   = new External("sint64");
-    public static readonly IType String   = new External("string");
-    public static readonly IType UInt32   = new External("uint32");
-    public static readonly IType UInt64   = new External("uint64");
-}

src/LibProtodec/Models/Types/WellKnown.cs

@@ -1,39 +0,0 @@
-// Copyright © 2024 Xpl0itR
-// 
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this
-// file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-namespace LibProtodec.Models.Types;
-
-public static class WellKnown
-{
-    public static readonly IType Any           = new External("google.protobuf.Any");
-    public static readonly IType Api           = new External("google.protobuf.Api");
-    public static readonly IType BoolValue     = new External("google.protobuf.BoolValue");
-    public static readonly IType BytesValue    = new External("google.protobuf.BytesValue");
-    public static readonly IType DoubleValue   = new External("google.protobuf.DoubleValue");
-    public static readonly IType Duration      = new External("google.protobuf.Duration");
-    public static readonly IType Empty         = new External("google.protobuf.Empty");
-    public static readonly IType Enum          = new External("google.protobuf.Enum");
-    public static readonly IType EnumValue     = new External("google.protobuf.EnumValue");
-    public static readonly IType Field         = new External("google.protobuf.Field");
-    public static readonly IType FieldMask     = new External("google.protobuf.FieldMask");
-    public static readonly IType FloatValue    = new External("google.protobuf.FloatValue");
-    public static readonly IType Int32Value    = new External("google.protobuf.Int32Value");
-    public static readonly IType Int64Value    = new External("google.protobuf.Int64Value");
-    public static readonly IType ListValue     = new External("google.protobuf.ListValue");
-    public static readonly IType Method        = new External("google.protobuf.Method");
-    public static readonly IType Mixin         = new External("google.protobuf.Mixin");
-    public static readonly IType NullValue     = new External("google.protobuf.NullValue");
-    public static readonly IType Option        = new External("google.protobuf.Option");
-    public static readonly IType SourceContext = new External("google.protobuf.SourceContext");
-    public static readonly IType StringValue   = new External("google.protobuf.StringValue");
-    public static readonly IType Struct        = new External("google.protobuf.Struct");
-    public static readonly IType Syntax        = new External("google.protobuf.Syntax");
-    public static readonly IType Timestamp     = new External("google.protobuf.Timestamp");
-    public static readonly IType Type          = new External("google.protobuf.Type");
-    public static readonly IType UInt32Value   = new External("google.protobuf.UInt32Value");
-    public static readonly IType UInt64Value   = new External("google.protobuf.UInt64Value");
-    public static readonly IType Value         = new External("google.protobuf.Value");
-}

src/LibProtodec/ProtodecContext.cs

@@ -10,24 +10,21 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
-using System.Reflection;
 using SystemEx;
 using CommunityToolkit.Diagnostics;
-using LibProtodec.Models;
+using LibProtodec.Models.Cil;
-using LibProtodec.Models.Fields;
+using LibProtodec.Models.Protobuf;
-using LibProtodec.Models.TopLevels;
+using LibProtodec.Models.Protobuf.Fields;
-using LibProtodec.Models.Types;
+using LibProtodec.Models.Protobuf.TopLevels;
+using LibProtodec.Models.Protobuf.Types;
 
 namespace LibProtodec;
 
-public delegate bool TypeLookupFunc(Type type, [NotNullWhen(true)] out IType? fieldType, out string? import);
+public delegate bool TypeLookupFunc(ICilType cilType, [NotNullWhen(true)] out IProtobufType? protobufType);
 public delegate bool NameLookupFunc(string name, [MaybeNullWhen(false)] out string translatedName);
 
 public sealed class ProtodecContext
 {
-    private const BindingFlags PublicStatic           = BindingFlags.Public | BindingFlags.Static;
-    private const BindingFlags PublicInstanceDeclared = BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly;
-
     private readonly Dictionary<string, TopLevel> _parsed = [];
 
     public readonly List<Protobuf> Protobufs = [];
@@ -52,11 +49,11 @@ public sealed class ProtodecContext
         }
     }
 
-    public Message ParseMessage(Type messageClass, ParserOptions options = ParserOptions.None)
+    public Message ParseMessage(ICilType messageClass, ParserOptions options = ParserOptions.None)
     {
         Guard.IsTrue(messageClass is { IsClass: true, IsSealed: true });
 
-        if (_parsed.TryGetValue(messageClass.FullName ?? messageClass.Name, out TopLevel? parsedMessage))
+        if (_parsed.TryGetValue(messageClass.FullName, out TopLevel? parsedMessage))
         {
             return (Message)parsedMessage;
         }
@@ -64,50 +61,48 @@ public sealed class ProtodecContext
         Message message = new()
         {
             Name       = TranslateTypeName(messageClass),
-            IsObsolete = HasObsoleteAttribute(messageClass.GetCustomAttributesData())
+            IsObsolete = HasObsoleteAttribute(messageClass.GetCustomAttributes())
         };
-        _parsed.Add(messageClass.FullName ?? messageClass.Name, message);
+        _parsed.Add(messageClass.FullName, message);
 
         Protobuf protobuf = GetProtobuf(messageClass, message, options);
 
-        FieldInfo[]    idFields   = messageClass.GetFields(PublicStatic);
+        List<ICilField> idFields = messageClass.GetFields()
-        PropertyInfo[] properties = messageClass.GetProperties(PublicInstanceDeclared);
+                                               .Where(static field => field is { IsPublic: true, IsStatic: true, IsLiteral: true })
+                                               .ToList();
 
-        for (int pi = 0, fi = 0; pi < properties.Length; pi++, fi++)
+        List<ICilProperty> properties = messageClass.GetProperties()
-        {
+                                                    .Where(static property => property is { IsInherited: false, CanRead: true, Getter: { IsPublic: true, IsStatic: false, IsVirtual: false } })
-            PropertyInfo               property   = properties[pi];
+                                                    .ToList();
-            IList<CustomAttributeData> attributes = property.GetCustomAttributesData();
 
-            if (((options & ParserOptions.IncludePropertiesWithoutNonUserCodeAttribute) == 0 && !HasNonUserCodeAttribute(attributes))
+        for (int pi = 0, fi = 0; pi < properties.Count; pi++)
-             || property.GetMethod?.IsVirtual != false)
+        {
+            ICilProperty        property   = properties[pi];
+            List<ICilAttribute> attributes = property.GetCustomAttributes().ToList();
+
+            if (((options & ParserOptions.IncludePropertiesWithoutNonUserCodeAttribute) == 0 && !HasNonUserCodeAttribute(attributes)))
             {
-                fi--;
                 continue;
             }
 
-            Type propertyType = property.PropertyType;
+            ICilType propertyType = property.Type;
 
             // only OneOf enums are defined nested directly in the message class
             if (propertyType.IsEnum && propertyType.DeclaringType?.Name == messageClass.Name)
             {
                 string oneOfName = TranslateOneOfPropName(property.Name);
-                int[] oneOfProtoFieldIds = propertyType.GetFields(PublicStatic)
+                List<int> oneOfProtoFieldIds = propertyType.GetFields()
-                                                       .Select(static field => (int)field.GetRawConstantValue()!)
+                                                           .Where(static field => field.IsLiteral)
+                                                           .Select(static field => (int)field.ConstantValue!)
                                                            .Where(static id => id > 0)
-                                                       .ToArray();
+                                                           .ToList();
 
                 message.OneOfs.Add(oneOfName, oneOfProtoFieldIds);
-                
-                fi--;
                 continue;
             }
 
-            FieldInfo idField = idFields[fi];
-            Guard.IsTrue(idField.IsLiteral);
-            Guard.IsEqualTo(idField.FieldType.Name, nameof(Int32));
-
             bool msgFieldHasHasProp = false; // some field properties are immediately followed by an additional "Has" get-only boolean property
-            if (properties.Length > pi + 1 && properties[pi + 1].PropertyType.Name == nameof(Boolean) && !properties[pi + 1].CanWrite)
+            if (properties.Count > pi + 1 && properties[pi + 1].Type.Name == nameof(Boolean) && !properties[pi + 1].CanWrite)
             {
                 msgFieldHasHasProp = true;
                 pi++;
@@ -117,22 +112,23 @@ public sealed class ProtodecContext
             {
                 Type       = ParseFieldType(propertyType, options, protobuf),
                 Name       = TranslateMessageFieldName(property.Name),
-                Id         = (int)idField.GetRawConstantValue()!,
+                Id         = (int)idFields[fi].ConstantValue!,
                 IsObsolete = HasObsoleteAttribute(attributes),
                 HasHasProp = msgFieldHasHasProp
             };
 
             message.Fields.Add(field.Id, field);
+            fi++;
         }
 
         return message;
     }
 
-    public Enum ParseEnum(Type enumEnum, ParserOptions options = ParserOptions.None)
+    public Enum ParseEnum(ICilType enumEnum, ParserOptions options = ParserOptions.None)
     {
         Guard.IsTrue(enumEnum.IsEnum);
 
-        if (_parsed.TryGetValue(enumEnum.FullName ?? enumEnum.Name, out TopLevel? parsedEnum))
+        if (_parsed.TryGetValue(enumEnum.FullName, out TopLevel? parsedEnum))
         {
             return (Enum)parsedEnum;
         }
@@ -140,20 +136,22 @@ public sealed class ProtodecContext
         Enum @enum = new()
         {
             Name         = TranslateTypeName(enumEnum),
-            IsObsolete   = HasObsoleteAttribute(enumEnum.GetCustomAttributesData())
+            IsObsolete   = HasObsoleteAttribute(enumEnum.GetCustomAttributes())
         };
-        _parsed.Add(enumEnum.FullName ?? enumEnum.Name, @enum);
+        _parsed.Add(enumEnum.FullName, @enum);
 
         Protobuf protobuf = GetProtobuf(enumEnum, @enum, options);
 
-        foreach (FieldInfo field in enumEnum.GetFields(PublicStatic))
+        foreach (ICilField field in enumEnum.GetFields().Where(static field => field.IsLiteral))
         {
+            List<ICilAttribute> attributes = field.GetCustomAttributes().ToList();
+
             @enum.Fields.Add(
                 new EnumField
                 {
-                    Id         = (int)field.GetRawConstantValue()!,
+                    Id         = (int)field.ConstantValue!,
-                    Name       = TranslateEnumFieldName(field, @enum.Name),
+                    Name       = TranslateEnumFieldName(attributes, field.Name, @enum.Name),
-                    IsObsolete = HasObsoleteAttribute(field.GetCustomAttributesData())
+                    IsObsolete = HasObsoleteAttribute(attributes)
                 });
         }
 
@@ -166,7 +164,7 @@ public sealed class ProtodecContext
         return @enum;
     }
 
-    public Service ParseService(Type serviceClass, ParserOptions options = ParserOptions.None)
+    public Service ParseService(ICilType serviceClass, ParserOptions options = ParserOptions.None)
     {
         Guard.IsTrue(serviceClass.IsClass);
 
@@ -175,7 +173,7 @@ public sealed class ProtodecContext
         {
             if (serviceClass is { IsSealed: true, IsNested: false })
             {
-                Type[] nested = serviceClass.GetNestedTypes();
+                List<ICilType> nested = serviceClass.GetNestedTypes().ToList();
                 serviceClass = nested.SingleOrDefault(static nested => nested is { IsAbstract: true, IsSealed: false }) 
                             ?? nested.Single(static nested => nested is { IsClass: true, IsAbstract: false });
             }
@@ -193,7 +191,7 @@ public sealed class ProtodecContext
 
         Guard.IsNotNull(isClientClass);
 
-        if (_parsed.TryGetValue(serviceClass.DeclaringType!.FullName ?? serviceClass.DeclaringType!.Name, out TopLevel? parsedService))
+        if (_parsed.TryGetValue(serviceClass.DeclaringType!.FullName, out TopLevel? parsedService))
         {
             return (Service)parsedService;
         }
@@ -201,22 +199,22 @@ public sealed class ProtodecContext
         Service service = new()
         {
             Name         = TranslateTypeName(serviceClass.DeclaringType),
-            IsObsolete   = HasObsoleteAttribute(serviceClass.GetCustomAttributesData())
+            IsObsolete   = HasObsoleteAttribute(serviceClass.GetCustomAttributes())
         };
-        _parsed.Add(serviceClass.DeclaringType!.FullName ?? serviceClass.DeclaringType.Name, service);
+        _parsed.Add(serviceClass.DeclaringType!.FullName, service);
 
         Protobuf protobuf = NewProtobuf(serviceClass, service);
 
-        foreach (MethodInfo method in serviceClass.GetMethods(PublicInstanceDeclared))
+        foreach (ICilMethod method in serviceClass.GetMethods().Where(static method => method is { IsInherited: false, IsPublic: true, IsStatic: false }))
         {
-            IList<CustomAttributeData> attributes = method.GetCustomAttributesData();
+            List<ICilAttribute> attributes = method.GetCustomAttributes().ToList();
             if ((options & ParserOptions.IncludeServiceMethodsWithoutGeneratedCodeAttribute) == 0
              && !HasGeneratedCodeAttribute(attributes, "grpc_csharp_plugin"))
             {
                 continue;
             }
 
-            Type requestType, responseType, returnType = method.ReturnType;
+            ICilType requestType, responseType, returnType = method.ReturnType;
             bool streamReq, streamRes;
 
             if (isClientClass.Value)
@@ -227,14 +225,13 @@ public sealed class ProtodecContext
                     continue;
                 }
 
-                ParameterInfo[] parameters = method.GetParameters();
+                List<ICilType> parameters = method.GetParameterTypes().ToList();
-                if (parameters.Length > 2)
+                if (parameters.Count > 2)
                 {
                     continue;
                 }
 
-                Type firstParamType = parameters[0].ParameterType;
+                switch (returnType.GenericTypeArguments.Count)
-                switch (returnType.GenericTypeArguments.Length)
                 {
                     case 2:
                         requestType  = returnType.GenericTypeArguments[0];
@@ -243,13 +240,13 @@ public sealed class ProtodecContext
                         streamRes    = returnTypeName == "AsyncDuplexStreamingCall`2";
                         break;
                     case 1:
-                        requestType  = firstParamType;
+                        requestType  = parameters[0];
                         responseType = returnType.GenericTypeArguments[0];
                         streamReq    = false;
                         streamRes    = true;
                         break;
                     default:
-                        requestType  = firstParamType;
+                        requestType  = parameters[0];
                         responseType = returnType;
                         streamReq    = false;
                         streamRes    = false;
@@ -258,21 +255,20 @@ public sealed class ProtodecContext
             }
             else
             {
-                ParameterInfo[] parameters     = method.GetParameters();
+                List<ICilType> parameters = method.GetParameterTypes().ToList();
-                Type            firstParamType = parameters[0].ParameterType;
 
-                if (firstParamType.GenericTypeArguments.Length == 1)
+                if (parameters[0].GenericTypeArguments.Count == 1)
                 {
                     streamReq   = true;
-                    requestType = firstParamType.GenericTypeArguments[0];
+                    requestType = parameters[0].GenericTypeArguments[0];
                 }
                 else
                 {
                     streamReq   = false;
-                    requestType = firstParamType;
+                    requestType = parameters[0];
                 }
 
-                if (returnType.GenericTypeArguments.Length == 1)
+                if (returnType.GenericTypeArguments.Count == 1)
                 {
                     streamRes    = false;
                     responseType = returnType.GenericTypeArguments[0];
@@ -280,7 +276,7 @@ public sealed class ProtodecContext
                 else
                 {
                     streamRes    = true;
-                    responseType = parameters[1].ParameterType.GenericTypeArguments[0];
+                    responseType = parameters[1].GenericTypeArguments[0];
                 }
             }
 
@@ -299,9 +295,9 @@ public sealed class ProtodecContext
         return service;
     }
 
-    private IType ParseFieldType(Type type, ParserOptions options, Protobuf referencingProtobuf)
+    private IProtobufType ParseFieldType(ICilType type, ParserOptions options, Protobuf referencingProtobuf)
     {
-        switch (type.GenericTypeArguments.Length)
+        switch (type.GenericTypeArguments.Count)
         {
             case 1:
                 return new Repeated(
@@ -312,16 +308,8 @@ public sealed class ProtodecContext
                     ParseFieldType(type.GenericTypeArguments[1], options, referencingProtobuf));
         }
 
-        if (TypeLookup(type, out IType? fieldType, out string? import))
+        if (!TypeLookup(type, out IProtobufType? fieldType))
         {
-            if (import is not null)
-            {
-                referencingProtobuf.Imports.Add(import);
-            }
-
-            return fieldType;
-        }
-
             if (type.IsEnum)
             {
                 if ((options & ParserOptions.SkipEnums) > 0)
@@ -335,21 +323,30 @@ public sealed class ProtodecContext
             {
                 fieldType = ParseMessage(type, options);
             }
+        }
 
-        Protobuf protobuf = ((INestableType)fieldType).Protobuf!;
+        switch (fieldType)
-        if (referencingProtobuf != protobuf)
         {
-            referencingProtobuf.Imports.Add(protobuf.FileName);
+            case WellKnown wellKnown:
+                referencingProtobuf.Imports.Add(
+                    wellKnown.FileName);
+                break;
+            case INestableType nestableType:
+                Protobuf protobuf = nestableType.Protobuf!;
+                if (referencingProtobuf != protobuf)
+                    referencingProtobuf.Imports.Add(
+                        protobuf.FileName);
+                break;
         }
 
         return fieldType;
     }
 
-    private Protobuf NewProtobuf(Type topLevelType, TopLevel topLevel)
+    private Protobuf NewProtobuf(ICilType topLevelType, TopLevel topLevel)
     {
         Protobuf protobuf = new()
         {
-            AssemblyName = topLevelType.Assembly.FullName,
+            AssemblyName = topLevelType.DeclaringAssemblyName,
             Namespace    = topLevelType.Namespace
         };
 
@@ -360,14 +357,14 @@ public sealed class ProtodecContext
         return protobuf;
     }
 
-    private Protobuf GetProtobuf<T>(Type topLevelType, T topLevel, ParserOptions options)
+    private Protobuf GetProtobuf<T>(ICilType topLevelType, T topLevel, ParserOptions options)
         where T : TopLevel, INestableType
     {
         Protobuf protobuf;
         if (topLevelType.IsNested)
         {
-            Type parent = topLevelType.DeclaringType!.DeclaringType!;
+            ICilType parent = topLevelType.DeclaringType!.DeclaringType!;
-            if (!_parsed.TryGetValue(parent.FullName ?? parent.Name, out TopLevel? parentTopLevel))
+            if (!_parsed.TryGetValue(parent.FullName, out TopLevel? parentTopLevel))
             {
                 parentTopLevel = ParseMessage(parent, options);
             }
@@ -421,25 +418,18 @@ public sealed class ProtodecContext
         return translatedName!.ToSnakeCaseLower();
     }
 
-    private string TranslateEnumFieldName(FieldInfo field, string enumName)
+    private string TranslateEnumFieldName(IEnumerable<ICilAttribute> attributes, string fieldName, string enumName)
     {
-        if (field.GetCustomAttributesData()
+        //TODO: parse original name from first parameter of OriginalNameAttribute constructor
-                 .SingleOrDefault(static attr => attr.AttributeType.Name == "OriginalNameAttribute")
+
-                ?.ConstructorArguments[0]
+        if (NameLookup?.Invoke(fieldName, out string? translatedName) == true)
-                 .Value
-            is string originalName)
         {
-            return originalName;
+            fieldName = translatedName;
         }
 
-        if (NameLookup?.Invoke(field.Name, out string? fieldName) != true)
+        if (!IsBeebyted(fieldName))
         {
-            fieldName = field.Name;
+            fieldName = fieldName.ToSnakeCaseUpper();
-        }
-
-        if (!IsBeebyted(fieldName!))
-        {
-            fieldName = fieldName!.ToSnakeCaseUpper();
         }
 
         if (!IsBeebyted(enumName))
@@ -450,14 +440,12 @@ public sealed class ProtodecContext
         return enumName + '_' + fieldName;
     }
 
-    private string TranslateTypeName(Type type)
+    private string TranslateTypeName(ICilType type)
     {
         if (NameLookup is null)
             return type.Name;
 
-        string? fullName = type.FullName;
+        string fullName = type.FullName;
-        Guard.IsNotNull(fullName);
-
         int genericArgs = fullName.IndexOf('[');
         if (genericArgs != -1)
             fullName = fullName[..genericArgs];
@@ -478,162 +466,123 @@ public sealed class ProtodecContext
         return translatedName;
     }
 
-    public static bool LookupScalarAndWellKnownTypes(Type type, [NotNullWhen(true)] out IType? fieldType, out string? import)
+    public static bool LookupScalarAndWellKnownTypes(ICilType cilType, [NotNullWhen(true)] out IProtobufType? protobufType)
     {
-        switch (type.FullName)
+        switch (cilType.FullName)
         {
             case "System.String":
-                import    = null;
+                protobufType = Scalar.String;
-                fieldType = Scalar.String;
                 return true;
             case "System.Boolean":
-                import    = null;
+                protobufType = Scalar.Bool;
-                fieldType = Scalar.Bool;
                 return true;
             case "System.Double":
-                import    = null;
+                protobufType = Scalar.Double;
-                fieldType = Scalar.Double;
                 return true;
             case "System.UInt32":
-                import    = null;
+                protobufType = Scalar.UInt32;
-                fieldType = Scalar.UInt32;
                 return true;
             case "System.UInt64":
-                import    = null;
+                protobufType = Scalar.UInt64;
-                fieldType = Scalar.UInt64;
                 return true;
             case "System.Int32":
-                import    = null;
+                protobufType = Scalar.Int32;
-                fieldType = Scalar.Int32;
                 return true;
             case "System.Int64":
-                import    = null;
+                protobufType = Scalar.Int64;
-                fieldType = Scalar.Int64;
                 return true;
             case "System.Single":
-                import    = null;
+                protobufType = Scalar.Float;
-                fieldType = Scalar.Float;
                 return true;
             case "Google.Protobuf.ByteString":
-                import    = null;
+                protobufType = Scalar.Bytes;
-                fieldType = Scalar.Bytes;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Any":
-                import    = "google/protobuf/any.proto";
+                protobufType = WellKnown.Any;
-                fieldType = WellKnown.Any;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Api":
-                import    = "google/protobuf/api.proto";
+                protobufType = WellKnown.Api;
-                fieldType = WellKnown.Api;
                 return true;
             case "Google.Protobuf.WellKnownTypes.BoolValue":
-                import    = "google/protobuf/wrappers.proto";
+                protobufType = WellKnown.BoolValue;
-                fieldType = WellKnown.BoolValue;
                 return true;
             case "Google.Protobuf.WellKnownTypes.BytesValue":
-                import    = "google/protobuf/wrappers.proto";
+                protobufType = WellKnown.BytesValue;
-                fieldType = WellKnown.BytesValue;
                 return true;
             case "Google.Protobuf.WellKnownTypes.DoubleValue":
-                import    = "google/protobuf/wrappers.proto";
+                protobufType = WellKnown.DoubleValue;
-                fieldType = WellKnown.DoubleValue;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Duration":
-                import    = "google/protobuf/duration.proto";
+                protobufType = WellKnown.Duration;
-                fieldType = WellKnown.Duration;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Empty":
-                import    = "google/protobuf/empty.proto";
+                protobufType = WellKnown.Empty;
-                fieldType = WellKnown.Empty;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Enum":
-                import    = "google/protobuf/type.proto";
+                protobufType = WellKnown.Enum;
-                fieldType = WellKnown.Enum;
                 return true;
             case "Google.Protobuf.WellKnownTypes.EnumValue":
-                import    = "google/protobuf/type.proto";
+                protobufType = WellKnown.EnumValue;
-                fieldType = WellKnown.EnumValue;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Field":
-                import    = "google/protobuf/type.proto";
+                protobufType = WellKnown.Field;
-                fieldType = WellKnown.Field;
                 return true;
             case "Google.Protobuf.WellKnownTypes.FieldMask":
-                import    = "google/protobuf/field_mask.proto";
+                protobufType = WellKnown.FieldMask;
-                fieldType = WellKnown.FieldMask;
                 return true;
             case "Google.Protobuf.WellKnownTypes.FloatValue":
-                import    = "google/protobuf/wrappers.proto";
+                protobufType = WellKnown.FloatValue;
-                fieldType = WellKnown.FloatValue;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Int32Value":
-                import    = "google/protobuf/wrappers.proto";
+                protobufType = WellKnown.Int32Value;
-                fieldType = WellKnown.Int32Value;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Int64Value":
-                import    = "google/protobuf/wrappers.proto";
+                protobufType = WellKnown.Int64Value;
-                fieldType = WellKnown.Int64Value;
                 return true;
             case "Google.Protobuf.WellKnownTypes.ListValue":
-                import    = "google/protobuf/struct.proto";
+                protobufType = WellKnown.ListValue;
-                fieldType = WellKnown.ListValue;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Method":
-                import    = "google/protobuf/api.proto";
+                protobufType = WellKnown.Method;
-                fieldType = WellKnown.Method;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Mixin":
-                import    = "google/protobuf/api.proto";
+                protobufType = WellKnown.Mixin;
-                fieldType = WellKnown.Mixin;
                 return true;
             case "Google.Protobuf.WellKnownTypes.NullValue":
-                import    = "google/protobuf/struct.proto";
+                protobufType = WellKnown.NullValue;
-                fieldType = WellKnown.NullValue;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Option":
-                import    = "google/protobuf/type.proto";
+                protobufType = WellKnown.Option;
-                fieldType = WellKnown.Option;
                 return true;
             case "Google.Protobuf.WellKnownTypes.SourceContext":
-                import    = "google/protobuf/source_context.proto";
+                protobufType = WellKnown.SourceContext;
-                fieldType = WellKnown.SourceContext;
                 return true;
             case "Google.Protobuf.WellKnownTypes.StringValue":
-                import    = "google/protobuf/wrappers.proto";
+                protobufType = WellKnown.StringValue;
-                fieldType = WellKnown.StringValue;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Struct":
-                import    = "google/protobuf/struct.proto";
+                protobufType = WellKnown.Struct;
-                fieldType = WellKnown.Struct;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Syntax":
-                import    = "google/protobuf/type.proto";
+                protobufType = WellKnown.Syntax;
-                fieldType = WellKnown.Syntax;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Timestamp":
-                import    = "google/protobuf/timestamp.proto";
+                protobufType = WellKnown.Timestamp;
-                fieldType = WellKnown.Timestamp;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Type":
-                import    = "google/protobuf/type.proto";
+                protobufType = WellKnown.Type;
-                fieldType = WellKnown.Type;
                 return true;
             case "Google.Protobuf.WellKnownTypes.UInt32Value":
-                import    = "google/protobuf/wrappers.proto";
+                protobufType = WellKnown.UInt32Value;
-                fieldType = WellKnown.UInt32Value;
                 return true;
             case "Google.Protobuf.WellKnownTypes.UInt64Value":
-                import    = "google/protobuf/wrappers.proto";
+                protobufType = WellKnown.UInt64Value;
-                fieldType = WellKnown.UInt64Value;
                 return true;
             case "Google.Protobuf.WellKnownTypes.Value":
-                import    = "google/protobuf/struct.proto";
+                protobufType = WellKnown.Value;
-                fieldType = WellKnown.Value;
                 return true;
-
             default:
-                import    = null;
+                protobufType = null;
-                fieldType = null;
                 return false;
         }
     }
@@ -642,13 +591,15 @@ public sealed class ProtodecContext
     private static bool IsBeebyted(string name) =>
         name.Length == 11 && name.CountUpper() == 11;
 
-    private static bool HasGeneratedCodeAttribute(IEnumerable<CustomAttributeData> attributes, string tool) =>
+    private static bool HasGeneratedCodeAttribute(IEnumerable<ICilAttribute> attributes, string tool)
-        attributes.Any(attr => attr.AttributeType.Name                      == nameof(GeneratedCodeAttribute)
+    {
-                            && attr.ConstructorArguments[0].Value as string == tool);
+        return attributes.Any(attr => attr.Type.Name == nameof(GeneratedCodeAttribute));
-
+        //TODO: ensure the first argument of the GeneratedCodeAttribute constructor == tool parameter
-    private static bool HasNonUserCodeAttribute(IEnumerable<CustomAttributeData> attributes) =>
+    }
-        attributes.Any(static attr => attr.AttributeType.Name == nameof(DebuggerNonUserCodeAttribute));
+
-
+    private static bool HasNonUserCodeAttribute(IEnumerable<ICilAttribute> attributes) =>
-    private static bool HasObsoleteAttribute(IEnumerable<CustomAttributeData> attributes) =>
+        attributes.Any(static attr => attr.Type.Name == nameof(DebuggerNonUserCodeAttribute));
-        attributes.Any(static attr => attr.AttributeType.Name == nameof(ObsoleteAttribute));
+
+    private static bool HasObsoleteAttribute(IEnumerable<ICilAttribute> attributes) =>
+        attributes.Any(static attr => attr.Type.Name == nameof(ObsoleteAttribute));
 }

src/protodec/Program.cs

@@ -1,16 +1,28 @@
-using System;
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System;
 using System.CodeDom.Compiler;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using AssetRipper.Primitives;
+using LibCpp2IL;
 using LibProtodec;
-using LibProtodec.Models;
+using LibProtodec.Loaders;
+using LibProtodec.Models.Cil;
+using LibProtodec.Models.Protobuf;
 
 const string indent = "  ";
 const string help   = """
-    Usage: protodec(.exe) <target_assembly_path> <out_path> [options]
+    Usage: protodec(.exe) <game_assembly_path> <global_metadata_path> <unity_version> <out_path> [options]
     Arguments:
-      target_assembly_path  Either the path to the target assembly or a directory of assemblies, all of which be parsed.
+      game_assembly_path    The path to the game assembly DLL.
+      global_metadata_path  The path to the global-metadata.dat file.
+      unity_version         The version of Unity which was used to create the metadata file or alternatively, the path to the globalgamemanagers or the data.unity3d file.
       out_path              An existing directory to output into individual files, otherwise output to a single file.
     Options:
       --parse_service_servers                                     Parses gRPC service definitions from server classes.
@@ -20,14 +32,16 @@ const string help   = """
       --include_service_methods_without_generated_code_attribute  Includes methods that aren't decorated with `GeneratedCode("grpc_csharp_plugin")` when parsing gRPC services.
     """;
 
-if (args.Length < 2)
+if (args.Length < 4)
 {
     Console.WriteLine(help);
     return;
 }
 
 string        assembly = args[0];
-string        outPath  = Path.GetFullPath(args[1]);
+string        metadata = args[1];
+string        uVersion = args[2];
+string        outPath  = Path.GetFullPath(args[3]);
 ParserOptions options  = ParserOptions.None;
 
 if (args.Contains("--skip_enums"))
@@ -39,17 +53,26 @@ if (args.Contains("--include_properties_without_non_user_code_attribute"))
 if (args.Contains("--include_service_methods_without_generated_code_attribute"))
     options |= ParserOptions.IncludeServiceMethodsWithoutGeneratedCodeAttribute;
 
-using AssemblyInspector inspector = new(assembly);
+if (!UnityVersion.TryParse(uVersion, out UnityVersion unityVersion, out _))
+{
+    unityVersion = uVersion.EndsWith("globalgamemanagers")
+        ? LibCpp2IlMain.GetVersionFromGlobalGameManagers(
+            File.ReadAllBytes(uVersion))
+        : LibCpp2IlMain.GetVersionFromDataUnity3D(
+            File.OpenRead(uVersion));
+}
+
+using ICilAssemblyLoader loader = new Il2CppAssemblyLoader(assembly, metadata, unityVersion);
 ProtodecContext ctx = new();
 
-foreach (Type message in inspector.GetProtobufMessageTypes())
+foreach (ICilType message in GetProtobufMessageTypes())
 {
     ctx.ParseMessage(message, options);
 }
 
 if (args.Contains("--parse_service_servers"))
 {
-    foreach (Type service in inspector.GetProtobufServiceServerTypes())
+    foreach (ICilType service in GetProtobufServiceServerTypes())
     {
         ctx.ParseService(service, options);
     }
@@ -57,7 +80,7 @@ if (args.Contains("--parse_service_servers"))
 
 if (args.Contains("--parse_service_clients"))
 {
-    foreach (Type service in inspector.GetProtobufServiceClientTypes())
+    foreach (ICilType service in GetProtobufServiceClientTypes())
     {
         ctx.ParseService(service, options);
     }
@@ -92,3 +115,19 @@ else
 
     ctx.WriteAllTo(indentWriter);
 }
+
+IEnumerable<ICilType> GetProtobufMessageTypes() =>
+    loader.LoadedTypes.Where(
+        type => type is { IsNested: false, IsSealed: true }
+             && type.Namespace?.StartsWith("Google.Protobuf", StringComparison.Ordinal) != true
+             && type.IsAssignableTo(loader.IMessage));
+
+IEnumerable<ICilType> GetProtobufServiceClientTypes() =>
+    loader.LoadedTypes.Where(
+        type => type is { IsNested: true, IsAbstract: false }
+             && type.IsAssignableTo(loader.ClientBase));
+
+IEnumerable<ICilType> GetProtobufServiceServerTypes() =>
+    loader.LoadedTypes.Where(
+        type => type is { IsNested: true, IsAbstract: true, DeclaringType: { IsNested: false, IsSealed: true, IsAbstract: true } }
+             && type.GetCustomAttributes().Any(attribute => attribute.Type == loader.BindServiceMethodAttribute));