static int readFileFromPhone_chunkSize = 500000; // see #1004128

static byte[] readFileFromPhone(S path) {

  ret readFileFromPhone(gateway(), path);

}

static byte[] readFileFromPhone(S ip, S path) {

  // todo: rough

  DialogIO io;

  talkTo_byThread.set(litmap(ip + ":" + 4999, io = talkTo(ip, 4999)));

  io.noClose = true;

  try {

    long n = parseLong(sendToAwareness(ip, "get file * length", path));

    if (n != (int) n) fail("Too big to load " + quote(path) + " in memory!! " + n);

    int l = (int) n;

    byte[] data = new byte[l];

    for (int i = 0; i < l;) {

      print("[Loading file from phone, " + i + "/" + l + "]");

      int len = min(readFileFromPhone_chunkSize, l-i);

      new Matches m;

      S answer = sendToAwarenessSilently(ip, "load file * bin from * l *", path, i, len);

      assertTrue(answer, answer.startsWith("OK "));

      System.arraycopy(bytesFromHex(answer.substring(3)), 0, data, i, len);

      i += len;

    }

    ret data;

  } finally {

    io.noClose = false;

    io.close();

    talkTo_byThread.set(null);

  }

}