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fun handleDevEvent(data: ByteArray) {

    val cmd = data[0].toInt()

    if (fullForward) {
        listener.handleDevEvent(data)
        return
    }

    if (cmd == Rpc.Cmd.RPC_CMDID_EVT_PCD_SET_FIELD.id) {
        setField(data[1])
    } else {
        listener.handleDevEvent(data)
    }
}
    
@Throws(IOException::class)
fun handleDevRequest(data: ByteArray): ByteArray? {

    val cmd = data[0].toInt()
    if (fullForward) return listener.handleDevRequest(data)

    /* Handles NFC requests locally. Pass the rest onto the higher level app */
    return when (cmd) {
        Rpc.Cmd.RPC_CMDID_REQ_PCD_DETECT.id -> {
        val resp = ByteArray(1)
        val timeout = data[1].toInt()
        resp[0] = detectCard(timeout).toByte()
        resp
        }
        Rpc.Cmd.RPC_CMDID_REQ_PCD_REMOVE.id -> {
            removeCard()
            ByteArray(1)
        }
        Rpc.Cmd.RPC_CMDID_REQ_PCD_XCHNG.id -> {
            val apdu = data.copyOfRange(1, 1 + data.size - 1)
            sendApdu(apdu)
        }
        else -> {
            listener.handleDevRequest(data)null
        }
    }
}