Possible to get reference to original object from a proxy?

[ivancuric]

Is it possible to get a reference to the original object from a proxy? Similarly to how Immer has original()?

I am working with some delegate patterns from a WASM codebase and need to create 2 class instances, where the second one is taking the first one as a constructor parameter.

So basically this:

// worker.js

const exposedApi = {
    FirstClass: proxy(wasmModule.FirstClass),
    SecondClass: proxy(wasmModule.SecondClass)
}

expose(exposedApi);

// main.js

const wrappedWorker = wrap(worker);

const FirstClassProxyInstance = await new wrappedWorker.FirstClass(...params);

// we make some changes
await FistClassProxy.someMethod(...params)`

// and try to create the second class
const SecondClassProxyInstance = await new wrappedWorker.SecondClass(FirstClassProxyInstance)

How I see it, I should not expose the raw SecondClass, but a helper method which would implement a theoretical Comlink.original that takes the proxy from one thread and gets the original:

createSecondClass: (firstClassProxy: FirstClass & ProxyMarked) {
   const FirstClassOriginal = Comlink.original(firstClassProxy);
   const SecondClassInstance = new SecondClass(FirstClassOriginal)
}

Is it possible to do something like this?

[ghost]

I have another propose - Comlink.weakProxy(obj) (similar with C++ weak_ptr) or Comlink.reference(obj) which means, when will transfer back, will referenced back. Also such type can be transferred into proxy, and from another side. Doing reference database, and object which points into that reference by uuid. When transfers back, ID is checking and backing reference.

[ivancuric]

Here's an example:

https://stackblitz.com/edit/vitejs-vite-7jnhy8?file=src%2Fmain.ts&file=src%2Fworker.ts

Is there any way to make this scenario work?