+ /// Update channel from partial announcement data received via rapid gossip sync
+ ///
+ /// `timestamp: u64`: Timestamp emulating the backdated original announcement receipt (by the
+ /// rapid gossip sync server)
+ ///
+ /// All other parameters as used in [`msgs::UnsignedChannelAnnouncement`] fields.
+ pub fn add_channel_from_partial_announcement(&self, short_channel_id: u64, timestamp: u64, features: ChannelFeatures, node_id_1: PublicKey, node_id_2: PublicKey) -> Result<(), LightningError> {
+ if node_id_1 == node_id_2 {
+ return Err(LightningError{err: "Channel announcement node had a channel with itself".to_owned(), action: ErrorAction::IgnoreError});
+ };
+
+ let node_1 = NodeId::from_pubkey(&node_id_1);
+ let node_2 = NodeId::from_pubkey(&node_id_2);
+ let channel_info = ChannelInfo {
+ features,
+ node_one: node_1.clone(),
+ one_to_two: None,
+ node_two: node_2.clone(),
+ two_to_one: None,
+ capacity_sats: None,
+ announcement_message: None,
+ announcement_received_time: timestamp,
+ };
+
+ self.add_channel_between_nodes(short_channel_id, channel_info, None)
+ }
+
+ fn add_channel_between_nodes(&self, short_channel_id: u64, channel_info: ChannelInfo, utxo_value: Option<u64>) -> Result<(), LightningError> {
+ let mut channels = self.channels.write().unwrap();
+ let mut nodes = self.nodes.write().unwrap();
+
+ let node_id_a = channel_info.node_one.clone();
+ let node_id_b = channel_info.node_two.clone();
+
+ match channels.entry(short_channel_id) {
+ BtreeEntry::Occupied(mut entry) => {
+ //TODO: because asking the blockchain if short_channel_id is valid is only optional
+ //in the blockchain API, we need to handle it smartly here, though it's unclear
+ //exactly how...
+ if utxo_value.is_some() {
+ // Either our UTXO provider is busted, there was a reorg, or the UTXO provider
+ // only sometimes returns results. In any case remove the previous entry. Note
+ // that the spec expects us to "blacklist" the node_ids involved, but we can't
+ // do that because
+ // a) we don't *require* a UTXO provider that always returns results.
+ // b) we don't track UTXOs of channels we know about and remove them if they
+ // get reorg'd out.
+ // c) it's unclear how to do so without exposing ourselves to massive DoS risk.
+ Self::remove_channel_in_nodes(&mut nodes, &entry.get(), short_channel_id);
+ *entry.get_mut() = channel_info;
+ } else {
+ return Err(LightningError{err: "Already have knowledge of channel".to_owned(), action: ErrorAction::IgnoreDuplicateGossip});
+ }
+ },
+ BtreeEntry::Vacant(entry) => {
+ entry.insert(channel_info);
+ }
+ };
+
+ for current_node_id in [node_id_a, node_id_b].iter() {
+ match nodes.entry(current_node_id.clone()) {
+ BtreeEntry::Occupied(node_entry) => {
+ node_entry.into_mut().channels.push(short_channel_id);
+ },
+ BtreeEntry::Vacant(node_entry) => {
+ node_entry.insert(NodeInfo {
+ channels: vec!(short_channel_id),
+ lowest_inbound_channel_fees: None,
+ announcement_info: None,
+ });
+ }
+ };
+ };
+
+ Ok(())
+ }
+