Function routing_add_channel_update

gossipd/routing.c:1285–1512

}

bool routing_add_channel_update(struct routing_state *rstate,
				const u8 *update TAKES,
				u32 index,
				struct peer *peer,
				bool ignore_timestamp,
				bool force_spam_flag)
{
	secp256k1_ecdsa_signature signature;
	struct short_channel_id short_channel_id;
	u32 timestamp;
	u8 message_flags, channel_flags;
	u16 expiry;
	struct amount_msat htlc_minimum, htlc_maximum;
	u32 fee_base_msat;
	u32 fee_proportional_millionths;
	struct bitcoin_blkid chain_hash;
	struct chan *chan;
	struct half_chan *hc;
	struct unupdated_channel *uc;
	u8 direction;
	struct amount_sat sat;
	bool spam;

	/* Make sure we own msg, even if we don't save it. */
	if (taken(update))
		tal_steal(tmpctx, update);

	if (!fromwire_channel_update(
				update, &signature, &chain_hash,
				&short_channel_id, &timestamp,
				&message_flags, &channel_flags,
				&expiry, &htlc_minimum, &fee_base_msat,
				&fee_proportional_millionths,
				&htlc_maximum))
		return false;

	direction = channel_flags & 0x1;
	chan = get_channel(rstate, &short_channel_id);

	if (chan) {
		uc = NULL;
		sat = chan->sat;
	} else {
		/* Maybe announcement was waiting for this update? */
		uc = get_unupdated_channel(rstate, &short_channel_id);
		if (!uc) {
			return false;
		}
		sat = uc->sat;
	}

	/* Reject update if the `htlc_maximum_msat` is greater
	 * than the total available channel satoshis */
	if (amount_msat_greater_sat(htlc_maximum, sat))
		return false;

	/* Check timestamp is sane (unless from store). */
	if (!index && !timestamp_reasonable(rstate, timestamp)) {