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Build and manipulate TON smart contracts in easy way.

There is a newer version: 0.8.0

;; Custom smart contract, wallet with extra field

() recv_internal(slice in_msg) impure {
    ;; do nothing for internal messages
}

() recv_external(slice in_msg) impure {
    var signature = in_msg~load_bits(512); ;; signature in msg body, see createInitExternalMessage()
    var cs = in_msg;
    var (msg_seqno, valid_until, extra_field) = (cs~load_uint(32), cs~load_uint(32), cs~load_uint(64)); ;; payload in message body, see createSigningMessage()
    throw_if(35, valid_until <= now());
    var ds = get_data().begin_parse();
    var (stored_seqno, public_key, stored_x_data) = (ds~load_uint(32), ds~load_uint(256), ds~load_uint(64)); ;; data in stateInit or in storage. See createDataCell()
    ds.end_parse();
    throw_unless(33, msg_seqno == stored_seqno);
    throw_unless(34, check_signature(slice_hash(in_msg), signature, public_key));
    accept_message();
    cs~touch(); ;; process data stored in ext message refs
    while (cs.slice_refs()) { ;; transfer msg. Data inside the body of external msg. See
        var mode = cs~load_uint(8);
        send_raw_message(cs~load_ref(), mode);
    }
    cs.end_parse();
    set_data(begin_cell().store_uint(stored_seqno + 1, 32).store_uint(public_key, 256).store_uint(stored_x_data, 64).store_uint(extra_field, 64).end_cell());
}

;; Get methods

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

int get_public_key() method_id {
    var cs = get_data().begin_parse();
    cs~load_uint(32);
    return cs.preload_uint(256);
}

int get_x_data() method_id {
    var cs = get_data().begin_parse();
    cs~load_uint(32);
    cs~load_uint(256);
    return cs.preload_uint(64);
}

int get_extra_field() method_id {
    var cs = get_data().begin_parse();
    cs~load_uint(32);
    cs~load_uint(256);
    cs~load_uint(64);
    return cs.preload_uint(64);
}