Ton

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;; Simple wallet smart contract
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() recv_internal(slice in_msg) impure {
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  ;; do nothing for internal messages
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}
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() recv_external(slice in_msg) impure {
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  var signature = in_msg~load_bits(512);
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  var cs = in_msg;
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  var (subwallet_id, valid_until, msg_seqno) = (cs~load_uint(32), cs~load_uint(32), cs~load_uint(32));
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  throw_if(35, valid_until <= now());
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  var ds = get_data().begin_parse();
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  var (stored_seqno, stored_subwallet, public_key) = (ds~load_uint(32), ds~load_uint(32), ds~load_uint(256));
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  ds.end_parse();
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  throw_unless(33, msg_seqno == stored_seqno);
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  throw_unless(34, subwallet_id == stored_subwallet);
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  throw_unless(35, check_signature(slice_hash(in_msg), signature, public_key));
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  accept_message();
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  cs~touch();
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  while (cs.slice_refs()) {
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    var mode = cs~load_uint(8);
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    send_raw_message(cs~load_ref(), mode);
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  }
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  set_data(begin_cell()
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    .store_uint(stored_seqno + 1, 32)
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    .store_uint(stored_subwallet, 32)
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    .store_uint(public_key, 256)
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    .end_cell());
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}
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;; Get methods
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int seqno() method_id {
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  return get_data().begin_parse().preload_uint(32);
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}
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int get_public_key() method_id {
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  var cs = get_data().begin_parse();
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  cs~load_uint(64);
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  return cs.preload_uint(256);
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}
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