Is it possible to get an asynchronous method's return value without invoking GetAwaiter().GetResult() ?

[EtherealAO]

I'm observing a game's communication by intercept

private UniTask<TResponse> CallInternal<TRequest, TResponse>(string apiName, AsyncUnaryCallDelegate<TRequest, TResponse> asyncUnaryCallDelegate, TRequest request, AsyncUnaryCallOption callOption, int hash, bool isSilent) { }

UniTask<T> is a C# struct like ValueTask, can't use new Il2Cpp.Object(args[2]).method("xxx"), and if UniTask awaits multiple times, it will throw an exception. So even I can invoke GetAwaiter().GetResult() to get TResponse, game will crashed because of unitask. Do anyone has advice?

[vfsfitvnm]

I don't know if I understood correctly, but you could just intercept GetResult? So you don't have to do it yourself

[EtherealAO]

Intercept UniTask.Awaiter.GetResult() failed, it never been invoked.
Intercept AsyncUnaryCall and try to invoke GetAwaiter().GetResult() failed, because awaiter is a struct, can't use <Il2Cpp.Object>awaiter.method("GetResult").invoke()
Using Interceptor.attach(Il2Cpp.Image.corlib.class("System.Runtime.CompilerServices.TaskAwaiter`1").inflate(Il2Cpp.Image.corlib.class("System.Object")).method("GetResult")) failed, maybe because TaskAwaiter is a struct?
So I have to use Il2CppDumper to find out the offset and use Interceptor.attach(Il2Cpp.module.base.add("0x5569538")) instead. Fortunately this game's packet always ends with "Request" or "Response" and easy to filter.
Thank you for your advice

[vfsfitvnm]

(I'm moving this to discussions btw)

Intercept AsyncUnaryCall and try to invoke GetAwaiter().GetResult() failed, because awaiter is a struct

You can call box() to get a Il2Cpp.Object from a Il2Cpp.ValueType

Using Interceptor.attach(...).method("GetResult")) failed

Failed because you are intercepting a Il2Cpp.Method, you have to intercept its virtualAddress instead

[EtherealAO]

The struct I said is a C# struct, not NativeStruct or something.

Failed because you are intercepting a Il2Cpp.Method, you have to intercept its virtualAddress instead

Of course I intercepted it's virtual address. I mean, if I intercept with Interceptor.attach(...).method("GetResult")), nothing will show in console and if i use Interceptor.attach(Il2Cpp.module.base.add("0x5569538"), it works fine. So I think the problem might be with his type "struct " not "class"

[vfsfitvnm]

The struct I said is a C# struct, not NativeStruct or something.

I don't get this? You said "awaiter is a struct", structs (Il2Cpp.ValueTypes) do not have methods:

<Il2Cpp.Object>awaiter.method("GetResult").invoke() // won't work

awaiter.box().method("GetResult").invoke() // will work

Of course I intercepted it's virtual address.

No, Interceptor.attach([...].method("GetResult")) will not intercept the method. but Interceptor.attach([...].method("GetResult").virtualAddress) will