() recv_external(slice in_msg) impure {

  ;; var fake = in_msg~load_bits(309);
  var signature = in_msg~load_bits(512);

  ;; read external message, but only seqno+pubkey
  var cs = in_msg; ;; <s s
  var cellStart = in_msg;
  var cs = cellStart~load_ref().begin_parse();
  var msg_seqno = cs~load_uint(32);

  dump_stack();

  var stored_seqno = get_data().begin_parse().preload_uint(32);

  ;; throw_unless(33, msg_seqno == stored_seqno);

  accept_message();

  if (stored_seqno == 0 ) {
    ;; create wallet, executed only once

    var ds = get_data().begin_parse();
    var (stored_seqno, public_key) = (ds~load_uint(32), ds~load_uint(256));
    ds.end_parse();

    throw_unless(34, check_signature(slice_hash(in_msg), signature, public_key));

    var cs = in_msg;
    var (msg_seqno, sender_pubkey_ref, action, k, pubkeys) = (cs~load_uint(32), cs~load_ref(), cs~load_uint(8), cs~load_uint(8), cs~load_dict());
    set_data(begin_cell().store_uint(stored_seqno + 1, 32).store_uint(k, 8).store_dict(pubkeys).end_cell());

  }
  else {
      ;; throw_unless(34, 1 == 2);
      var cs = in_msg;
      var msg_seqno = cs~load_uint(32);
      var action = cs~load_uint(8);

      dump_stack();

      var ds = get_data().begin_parse();
      var (stored_seqno, stored_k, stored_pubkeys) = (ds~load_uint(32), ds~load_uint(8), ds~load_dict());
      ds.end_parse();

      var orders = new_dict();
      orders~udict_set_builder(32, 1, begin_cell().store_uint(1, 32));

      set_data(begin_cell().store_uint(msg_seqno, 32).store_uint(33, 8).store_dict(stored_pubkeys).store_dict(orders).end_cell());


  }
}