Passing ByteArray to iOS and back to Ionic

Capacitor
1

Hi,

I created my own plugin where I need to transfer byte arrays from Ionic to iOS (Swift) process them and afterwards back to Ionic.

Ionic → ByteArray → iOS → ByteArray → Ionic

So I created an interface function in the
definitions.ts

transceive(data: Uint8Array): Promise<{ result: Uint8Array }>;

My iOS code looks like the following:
Plugin.swift

 @objc func transceive(_ call: CAPPluginCall) {
        print("transceive()")

        let dataReceived = call.getObject("data")! //crashes
        print(dataReceived) 

       //do something with the byte array

       call.resolve(["result": dataReceived]) // return byte array
 }

My code in Ionic looks like this:
ionic.ts

const test = new Uint8Array([0x90, 0x71]);
const result = await CapacitorPlugin.transceive({ data: test });

Is that possible in Capacitor 2 or do I need to transfer strings and convert them to byteArrays at each endpoint?

Thanks in advance
Max