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);
  }
}