Merge pull request #1656 from ViktorTigerstrom/2022-08-forward-htlcs-as-standalone...
[rust-lightning] / lightning / src / routing / gossip.rs
index 92a0e479a3de6a2d12266e8f67cd049243d6ca0c..f5c56ce4bcb99272bddd92fa4ec0e5d471c8413e 100644 (file)
@@ -197,6 +197,7 @@ where C::Target: chain::Access, L::Target: Logger
 {
        network_graph: G,
        chain_access: Option<C>,
+       #[cfg(feature = "std")]
        full_syncs_requested: AtomicUsize,
        pending_events: Mutex<Vec<MessageSendEvent>>,
        logger: L,
@@ -213,6 +214,7 @@ where C::Target: chain::Access, L::Target: Logger
        pub fn new(network_graph: G, chain_access: Option<C>, logger: L) -> Self {
                P2PGossipSync {
                        network_graph,
+                       #[cfg(feature = "std")]
                        full_syncs_requested: AtomicUsize::new(0),
                        chain_access,
                        pending_events: Mutex::new(vec![]),
@@ -235,6 +237,7 @@ where C::Target: chain::Access, L::Target: Logger
                &self.network_graph
        }
 
+       #[cfg(feature = "std")]
        /// Returns true when a full routing table sync should be performed with a peer.
        fn should_request_full_sync(&self, _node_id: &PublicKey) -> bool {
                //TODO: Determine whether to request a full sync based on the network map.
@@ -365,10 +368,12 @@ where C::Target: chain::Access, L::Target: Logger
        /// to request gossip messages for each channel. The sync is considered complete
        /// when the final reply_scids_end message is received, though we are not
        /// tracking this directly.
-       fn peer_connected(&self, their_node_id: &PublicKey, init_msg: &Init) {
+       fn peer_connected(&self, their_node_id: &PublicKey, init_msg: &Init) -> Result<(), ()> {
                // We will only perform a sync with peers that support gossip_queries.
                if !init_msg.features.supports_gossip_queries() {
-                       return ();
+                       // Don't disconnect peers for not supporting gossip queries. We may wish to have
+                       // channels with peers even without being able to exchange gossip.
+                       return Ok(());
                }
 
                // The lightning network's gossip sync system is completely broken in numerous ways.
@@ -421,13 +426,12 @@ where C::Target: chain::Access, L::Target: Logger
                // `gossip_timestamp_filter`, with the filter time set either two weeks ago or an hour ago.
                //
                // For no-std builds, we bury our head in the sand and do a full sync on each connection.
-               let should_request_full_sync = self.should_request_full_sync(&their_node_id);
                #[allow(unused_mut, unused_assignments)]
                let mut gossip_start_time = 0;
                #[cfg(feature = "std")]
                {
                        gossip_start_time = SystemTime::now().duration_since(UNIX_EPOCH).expect("Time must be > 1970").as_secs();
-                       if should_request_full_sync {
+                       if self.should_request_full_sync(&their_node_id) {
                                gossip_start_time -= 60 * 60 * 24 * 7 * 2; // 2 weeks ago
                        } else {
                                gossip_start_time -= 60 * 60; // an hour ago
@@ -443,6 +447,7 @@ where C::Target: chain::Access, L::Target: Logger
                                timestamp_range: u32::max_value(),
                        },
                });
+               Ok(())
        }
 
        fn handle_reply_channel_range(&self, _their_node_id: &PublicKey, _msg: ReplyChannelRange) -> Result<(), LightningError> {
@@ -571,6 +576,12 @@ where C::Target: chain::Access, L::Target: Logger
                })
        }
 
+       fn provided_node_features(&self) -> NodeFeatures {
+               let mut features = NodeFeatures::empty();
+               features.set_gossip_queries_optional();
+               features
+       }
+
        fn provided_init_features(&self, _their_node_id: &PublicKey) -> InitFeatures {
                let mut features = InitFeatures::empty();
                features.set_gossip_queries_optional();
@@ -1858,11 +1869,12 @@ impl ReadOnlyNetworkGraph<'_> {
 #[cfg(test)]
 mod tests {
        use chain;
+       use ln::channelmanager;
        use ln::chan_utils::make_funding_redeemscript;
        use ln::PaymentHash;
-       use ln::features::{ChannelFeatures, InitFeatures, NodeFeatures};
+       use ln::features::InitFeatures;
        use routing::gossip::{P2PGossipSync, NetworkGraph, NetworkUpdate, NodeAlias, MAX_EXCESS_BYTES_FOR_RELAY, NodeId, RoutingFees, ChannelUpdateInfo, ChannelInfo, NodeAnnouncementInfo, NodeInfo};
-       use ln::msgs::{Init, RoutingMessageHandler, UnsignedNodeAnnouncement, NodeAnnouncement,
+       use ln::msgs::{RoutingMessageHandler, UnsignedNodeAnnouncement, NodeAnnouncement,
                UnsignedChannelAnnouncement, ChannelAnnouncement, UnsignedChannelUpdate, ChannelUpdate,
                ReplyChannelRange, QueryChannelRange, QueryShortChannelIds, MAX_VALUE_MSAT};
        use util::test_utils;
@@ -1906,6 +1918,7 @@ mod tests {
        }
 
        #[test]
+       #[cfg(feature = "std")]
        fn request_full_sync_finite_times() {
                let network_graph = create_network_graph();
                let (secp_ctx, gossip_sync) = create_gossip_sync(&network_graph);
@@ -1922,7 +1935,7 @@ mod tests {
        fn get_signed_node_announcement<F: Fn(&mut UnsignedNodeAnnouncement)>(f: F, node_key: &SecretKey, secp_ctx: &Secp256k1<secp256k1::All>) -> NodeAnnouncement {
                let node_id = PublicKey::from_secret_key(&secp_ctx, node_key);
                let mut unsigned_announcement = UnsignedNodeAnnouncement {
-                       features: NodeFeatures::known(),
+                       features: channelmanager::provided_node_features(),
                        timestamp: 100,
                        node_id: node_id,
                        rgb: [0; 3],
@@ -1946,7 +1959,7 @@ mod tests {
                let node_2_btckey = &SecretKey::from_slice(&[39; 32]).unwrap();
 
                let mut unsigned_announcement = UnsignedChannelAnnouncement {
-                       features: ChannelFeatures::known(),
+                       features: channelmanager::provided_channel_features(),
                        chain_hash: genesis_block(Network::Testnet).header.block_hash(),
                        short_channel_id: 0,
                        node_id_1,
@@ -2593,6 +2606,7 @@ mod tests {
        #[cfg(feature = "std")]
        fn calling_sync_routing_table() {
                use std::time::{SystemTime, UNIX_EPOCH};
+               use ln::msgs::Init;
 
                let network_graph = create_network_graph();
                let (secp_ctx, gossip_sync) = create_gossip_sync(&network_graph);
@@ -2603,16 +2617,18 @@ mod tests {
 
                // It should ignore if gossip_queries feature is not enabled
                {
-                       let init_msg = Init { features: InitFeatures::known().clear_gossip_queries(), remote_network_address: None };
-                       gossip_sync.peer_connected(&node_id_1, &init_msg);
+                       let init_msg = Init { features: InitFeatures::empty(), remote_network_address: None };
+                       gossip_sync.peer_connected(&node_id_1, &init_msg).unwrap();
                        let events = gossip_sync.get_and_clear_pending_msg_events();
                        assert_eq!(events.len(), 0);
                }
 
                // It should send a gossip_timestamp_filter with the correct information
                {
-                       let init_msg = Init { features: InitFeatures::known(), remote_network_address: None };
-                       gossip_sync.peer_connected(&node_id_1, &init_msg);
+                       let mut features = InitFeatures::empty();
+                       features.set_gossip_queries_optional();
+                       let init_msg = Init { features, remote_network_address: None };
+                       gossip_sync.peer_connected(&node_id_1, &init_msg).unwrap();
                        let events = gossip_sync.get_and_clear_pending_msg_events();
                        assert_eq!(events.len(), 1);
                        match &events[0] {
@@ -3001,7 +3017,7 @@ mod tests {
                // 2. Test encoding/decoding of ChannelInfo
                // Check we can encode/decode ChannelInfo without ChannelUpdateInfo fields present.
                let chan_info_none_updates = ChannelInfo {
-                       features: ChannelFeatures::known(),
+                       features: channelmanager::provided_channel_features(),
                        node_one: NodeId::from_pubkey(&nodes[0].node.get_our_node_id()),
                        one_to_two: None,
                        node_two: NodeId::from_pubkey(&nodes[1].node.get_our_node_id()),
@@ -3019,7 +3035,7 @@ mod tests {
 
                // Check we can encode/decode ChannelInfo with ChannelUpdateInfo fields present.
                let chan_info_some_updates = ChannelInfo {
-                       features: ChannelFeatures::known(),
+                       features: channelmanager::provided_channel_features(),
                        node_one: NodeId::from_pubkey(&nodes[0].node.get_our_node_id()),
                        one_to_two: Some(chan_update_info.clone()),
                        node_two: NodeId::from_pubkey(&nodes[1].node.get_our_node_id()),
@@ -3061,7 +3077,7 @@ mod tests {
                // 1. Check we can read a valid NodeAnnouncementInfo and fail on an invalid one
                let valid_netaddr = ::ln::msgs::NetAddress::Hostname { hostname: ::util::ser::Hostname::try_from("A".to_string()).unwrap(), port: 1234 };
                let valid_node_ann_info = NodeAnnouncementInfo {
-                       features: NodeFeatures::known(),
+                       features: channelmanager::provided_node_features(),
                        last_update: 0,
                        rgb: [0u8; 3],
                        alias: NodeAlias([0u8; 32]),