From b9547480ea2488f4ea052e632fd9df68e726e543 Mon Sep 17 00:00:00 2001 From: Jeffrey Czyz Date: Tue, 27 Feb 2024 18:37:39 -0600 Subject: [PATCH] Prefer non-Tor nodes when creating blinded paths Tor nodes can have high latency which can have a detrimental effect on onion message reliability. Prefer using nodes that aren't Tor-only when creating blinded paths both in offers and in onion message reply paths. --- lightning/src/ln/offers_tests.rs | 87 +++++++++++++++++++++++- lightning/src/onion_message/messenger.rs | 15 ++-- 2 files changed, 95 insertions(+), 7 deletions(-) diff --git a/lightning/src/ln/offers_tests.rs b/lightning/src/ln/offers_tests.rs index 0038bdd79..54dc5e4a5 100644 --- a/lightning/src/ln/offers_tests.rs +++ b/lightning/src/ln/offers_tests.rs @@ -45,7 +45,7 @@ use crate::blinded_path::BlindedPath; use crate::events::{Event, MessageSendEventsProvider, PaymentPurpose}; use crate::ln::channelmanager::{PaymentId, RecentPaymentDetails, Retry, self}; use crate::ln::functional_test_utils::*; -use crate::ln::msgs::{ChannelMessageHandler, Init, OnionMessage, OnionMessageHandler}; +use crate::ln::msgs::{ChannelMessageHandler, Init, NodeAnnouncement, OnionMessage, OnionMessageHandler, RoutingMessageHandler, SocketAddress, UnsignedGossipMessage, UnsignedNodeAnnouncement}; use crate::offers::invoice::Bolt12Invoice; use crate::offers::invoice_error::InvoiceError; use crate::offers::invoice_request::InvoiceRequest; @@ -53,6 +53,8 @@ use crate::offers::parse::Bolt12SemanticError; use crate::onion_message::messenger::PeeledOnion; use crate::onion_message::offers::OffersMessage; use crate::onion_message::packet::ParsedOnionMessageContents; +use crate::routing::gossip::{NodeAlias, NodeId}; +use crate::sign::{NodeSigner, Recipient}; use crate::prelude::*; @@ -98,6 +100,37 @@ fn disconnect_peers<'a, 'b, 'c>(node_a: &Node<'a, 'b, 'c>, peers: &[&Node<'a, 'b } } +fn announce_node_address<'a, 'b, 'c>( + node: &Node<'a, 'b, 'c>, peers: &[&Node<'a, 'b, 'c>], address: SocketAddress, +) { + let features = node.onion_messenger.provided_node_features() + | node.gossip_sync.provided_node_features(); + let rgb = [0u8; 3]; + let announcement = UnsignedNodeAnnouncement { + features, + timestamp: 1000, + node_id: NodeId::from_pubkey(&node.keys_manager.get_node_id(Recipient::Node).unwrap()), + rgb, + alias: NodeAlias([0u8; 32]), + addresses: vec![address], + excess_address_data: Vec::new(), + excess_data: Vec::new(), + }; + let signature = node.keys_manager.sign_gossip_message( + UnsignedGossipMessage::NodeAnnouncement(&announcement) + ).unwrap(); + + let msg = NodeAnnouncement { + signature, + contents: announcement + }; + + node.gossip_sync.handle_node_announcement(&msg).unwrap(); + for peer in peers { + peer.gossip_sync.handle_node_announcement(&msg).unwrap(); + } +} + fn route_bolt12_payment<'a, 'b, 'c>( node: &Node<'a, 'b, 'c>, path: &[&Node<'a, 'b, 'c>], invoice: &Bolt12Invoice ) { @@ -178,6 +211,58 @@ fn extract_invoice_error<'a, 'b, 'c>( } } +/// Checks that blinded paths without Tor-only nodes are preferred when constructing an offer. +#[test] +fn prefers_non_tor_nodes_in_blinded_paths() { + let mut accept_forward_cfg = test_default_channel_config(); + accept_forward_cfg.accept_forwards_to_priv_channels = true; + + let mut features = channelmanager::provided_init_features(&accept_forward_cfg); + features.set_onion_messages_optional(); + features.set_route_blinding_optional(); + + let chanmon_cfgs = create_chanmon_cfgs(6); + let node_cfgs = create_node_cfgs(6, &chanmon_cfgs); + + *node_cfgs[1].override_init_features.borrow_mut() = Some(features); + + let node_chanmgrs = create_node_chanmgrs( + 6, &node_cfgs, &[None, Some(accept_forward_cfg), None, None, None, None] + ); + let nodes = create_network(6, &node_cfgs, &node_chanmgrs); + + create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000); + create_unannounced_chan_between_nodes_with_value(&nodes, 2, 3, 10_000_000, 1_000_000_000); + create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 10_000_000, 1_000_000_000); + create_announced_chan_between_nodes_with_value(&nodes, 1, 4, 10_000_000, 1_000_000_000); + create_announced_chan_between_nodes_with_value(&nodes, 1, 5, 10_000_000, 1_000_000_000); + create_announced_chan_between_nodes_with_value(&nodes, 2, 4, 10_000_000, 1_000_000_000); + create_announced_chan_between_nodes_with_value(&nodes, 2, 5, 10_000_000, 1_000_000_000); + + // Add an extra channel so that more than one of Bob's peers have MIN_PEER_CHANNELS. + create_announced_chan_between_nodes_with_value(&nodes, 4, 5, 10_000_000, 1_000_000_000); + + let (alice, bob, charlie, david) = (&nodes[0], &nodes[1], &nodes[2], &nodes[3]); + let bob_id = bob.node.get_our_node_id(); + let charlie_id = charlie.node.get_our_node_id(); + + disconnect_peers(alice, &[charlie, david, &nodes[4], &nodes[5]]); + disconnect_peers(david, &[bob, &nodes[4], &nodes[5]]); + + let tor = SocketAddress::OnionV2([255, 254, 253, 252, 251, 250, 249, 248, 247, 246, 38, 7]); + announce_node_address(charlie, &[alice, bob, david, &nodes[4], &nodes[5]], tor); + + let offer = bob.node + .create_offer_builder("coffee".to_string()).unwrap() + .amount_msats(10_000_000) + .build().unwrap(); + assert_ne!(offer.signing_pubkey(), bob_id); + assert!(!offer.paths().is_empty()); + for path in offer.paths() { + assert_ne!(path.introduction_node_id, charlie_id); + } +} + /// Checks that an offer can be paid through blinded paths and that ephemeral pubkeys are used /// rather than exposing a node's pubkey. #[test] diff --git a/lightning/src/onion_message/messenger.rs b/lightning/src/onion_message/messenger.rs index 2dc5a89a3..c221e7820 100644 --- a/lightning/src/onion_message/messenger.rs +++ b/lightning/src/onion_message/messenger.rs @@ -358,16 +358,19 @@ where const MIN_PEER_CHANNELS: usize = 3; let network_graph = self.network_graph.deref().read_only(); - let paths = peers.iter() + let mut peer_info = peers.iter() // Limit to peers with announced channels - .filter(|pubkey| + .filter_map(|pubkey| network_graph .node(&NodeId::from_pubkey(pubkey)) - .map(|info| &info.channels[..]) - .map(|channels| channels.len() >= MIN_PEER_CHANNELS) - .unwrap_or(false) + .filter(|info| info.channels.len() >= MIN_PEER_CHANNELS) + .map(|info| (*pubkey, info.is_tor_only())) ) - .map(|pubkey| vec![*pubkey, recipient]) + .collect::>(); + peer_info.sort_unstable_by(|(_, a_tor_only), (_, b_tor_only)| a_tor_only.cmp(b_tor_only)); + + let paths = peer_info.into_iter() + .map(|(pubkey, _)| vec![pubkey, recipient]) .map(|node_pks| BlindedPath::new_for_message(&node_pks, &*self.entropy_source, secp_ctx)) .take(MAX_PATHS) .collect::, _>>(); -- 2.39.5