Function gossmap_chan_get_update

common/gossmap.c:1694–1711

Return the channel_update (or NULL if !gossmap_chan_set) */

/* Return the channel_update (or NULL if !gossmap_chan_set) */
u8 *gossmap_chan_get_update(const tal_t *ctx,
			    const struct gossmap *map,
			    const struct gossmap_chan *chan,
			    int dir)
{
	u16 len;
	u8 *msg;

	if (chan->cupdate_off[dir] == 0)
		return NULL;

	len = map_be16(map, chan->cupdate_off[dir] - sizeof(struct gossip_hdr)
		       + offsetof(struct gossip_hdr, len));
	msg = tal_arr(ctx, u8, len);

	map_copy(map, chan->cupdate_off[dir], msg, len);
	return msg;
}

/* BOLT #7:
 * 1. type: 258 (`channel_update`)