Wrapping java listener with kotlin corutine to return List of data in suspend way

corutine_extract_callback.kt

// Wrapper funtion for listener/callback
suspend fun hiSearchCameraLan(): Channel<HiSearchSDK.HiSearchResult> {
    val channel = Channel<HiSearchSDK.HiSearchResult>(Channel.UNLIMITED)
    launch(UI) {
        val searchSDK = HiSearchSDK(HiSearchSDK.ISearchResult { result ->
            if (!result.uid.isEmpty())
                channel.offer(result)
            else
                channel.close(NullPointerException())
        })
        searchSDK.search2()
        channel.invokeOnClose {
            searchSDK.stop()
        }
    }
    return channel
}

// Usage
fun findCameras(): Either<Failure, List<MyCameraEntity>> {
    val list = ArrayList<MyCameraEntity>()
    runBlocking {
        val hiSearchCameraLan = hiSearchCameraLan()
        hiSearchCameraLan.consume {
            hiSearchCameraLan.let<ReceiveChannel<HiSearchSDK.HiSearchResult>, Unit> { cameraChannel ->
                while (true) {
                    val nextCamera = withTimeoutOrNull(2, TimeUnit.SECONDS) {
                        cameraChannel.receiveOrNull()
                    } ?: break
                    list.add(MyCameraEntity(nextCamera.uid, "", "", nextCamera.name, nextCamera.version))
                }
            }
        }
    }
    return Either.Right(list)
}