Function gossmap_chan_get_feature

common/gossmap.c:1663–1675

BOLT #7: * 1. type: 256 (`channel_announcement`) * 2. data: * * [`signature`:`node_signature_1`] * * [`signature`:`node_signature_2`] * * [`signature`:`bitcoin_signature_1`] * * [`signature`:`bitcoin_signature_2`] * * [`u16`:`len`] * * [`len*byte`:`features`] * * [`chain_hash`:`chain_hash`] * * [`short_channel_id`:`short_channel_id`] * * [`point`:`nod

 *     * [`point`:`node_id_2`]
 */
int gossmap_chan_get_feature(const struct gossmap *map,
			     const struct gossmap_chan *c,
			     int fbit)
{
	/* Note that first two bytes are message type */
	const u64 feature_len_off = 2 + (64 + 64 + 64 + 64);
	size_t feature_len;

	feature_len = map_be16(map, c->cann_off + feature_len_off);

	return map_feature_test(map, COMPULSORY_FEATURE(fbit),
				c->cann_off + feature_len_off + 2, feature_len);
}

u8 *gossmap_chan_get_features(const tal_t *ctx,
			      const struct gossmap *map,