// BroadcastReceiver
class SmsListener: BroadcastReceiver() {

    private var smsNotification: SmsNotification? = null

    override fun onReceive(context: Context?, intent: Intent?) {
        if (BuildConfig.DEBUG) Log.v(TAG, "SmsListener - Intercept message")

        intent?.apply {
            when (action) {
                SmsRetriever.SMS_RETRIEVED_ACTION -> {
                    val extras = this.extras
                    val status = extras?.get(SmsRetriever.EXTRA_STATUS) as Status

                    when (status.statusCode) {
                        CommonStatusCodes.SUCCESS -> {
                            // Get SMS message contents
                            val message = extras.get(SmsRetriever.EXTRA_SMS_MESSAGE).toString()
                            val code = message.filter { it.isDigit() }
                            if (BuildConfig.DEBUG) {
                                Log.v(TAG, "message => $message")
                                Log.v(TAG, "Code from SMS is => $code")
                            }
                            Log.v(TAG, "smsNotification => $smsNotification")
                            smsNotification?.codeFromSms(code) //Вот здесь smsNotification = null ?????
                        }
                        CommonStatusCodes.TIMEOUT -> {
                            status.status.statusMessage?.let { smsNotification?.error(it) }
                            if (BuildConfig.DEBUG) Log.v(TAG, "Status => ${status.status}")
                        }
                        else -> Unit
                    }
                }
            }
        }
    }

    fun setListener(listener: SmsNotification) {
        smsNotification = listener
    }
}

//Interface
interface SmsNotification {
    fun codeFromSms(code: String)
    fun error(message: String)
}

//Fragment
class CodeFragment : Fragment(), SmsNotification {

    @Inject
    lateinit var receiver: SmsListener

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        receiver.setListener(this)
    }

    override fun onStart() {
        super.onStart()
        registerSmsReceiver()
    }

    override fun onPause() {
        super.onPause()
        unregisterSmsReceiver()
    }

    private fun registerSmsReceiver() =
        requireActivity().registerReceiver(receiver, IntentFilter(SMS_RETRIEVER))


    private fun unregisterSmsReceiver() =
        LocalBroadcastManager
            .getInstance(requireContext())
            .unregisterReceiver(receiver)
}