Ton

1
;; Simple wallet smart contract
2

3
() recv_internal(slice in_msg) impure {
4
  ;; do nothing for internal messages
5
}
6

7
() recv_external(slice in_msg) impure {
8
  var signature = in_msg~load_bits(512);
9
  var cs = in_msg;
10
  var (msg_seqno, valid_until) = (cs~load_uint(32), cs~load_uint(32));
11
  throw_if(35, valid_until <= now());
12
  var ds = get_data().begin_parse();
13
  var (stored_seqno, public_key) = (ds~load_uint(32), ds~load_uint(256));
14
  ds.end_parse();
15
  throw_unless(33, msg_seqno == stored_seqno);
16
  throw_unless(34, check_signature(slice_hash(in_msg), signature, public_key));
17
  accept_message();
18
  cs~touch();
19
  while (cs.slice_refs()) {
20
    var mode = cs~load_uint(8);
21
    send_raw_message(cs~load_ref(), mode);
22
  }
23
  cs.end_parse();
24
  set_data(begin_cell().store_uint(stored_seqno + 1, 32).store_uint(public_key, 256).end_cell());
25
}
26

27
;; Get methods
28

29
int seqno() method_id {
30
  return get_data().begin_parse().preload_uint(32);
31
}
32

33
int get_public_key() method_id {
34
  var cs = get_data().begin_parse();
35
  cs~load_uint(32);
36
  return cs.preload_uint(256);
37
}
38