assert_eq!(route.paths.len(), 1);
assert_eq!(route.get_total_amount(), amt_msat);
}
+
+ #[test]
+ fn first_hop_preferred_over_hint() {
+ // Check that if we have a first hop to a peer we'd always prefer that over a route hint
+ // they gave us, but we'd still consider all subsequent hints if they are more attractive.
+ let secp_ctx = Secp256k1::new();
+ let logger = Arc::new(ln_test_utils::TestLogger::new());
+ let network_graph = Arc::new(NetworkGraph::new(Network::Testnet, Arc::clone(&logger)));
+ let gossip_sync = P2PGossipSync::new(Arc::clone(&network_graph), None, Arc::clone(&logger));
+ let scorer = ln_test_utils::TestScorer::new();
+ let keys_manager = ln_test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
+ let random_seed_bytes = keys_manager.get_secure_random_bytes();
+ let config = UserConfig::default();
+
+ let amt_msat = 1_000_000;
+ let (our_privkey, our_node_id, privkeys, nodes) = get_nodes(&secp_ctx);
+
+ add_channel(&gossip_sync, &secp_ctx, &our_privkey, &privkeys[0],
+ ChannelFeatures::from_le_bytes(id_to_feature_flags(1)), 1);
+ update_channel(&gossip_sync, &secp_ctx, &our_privkey, UnsignedChannelUpdate {
+ chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+ short_channel_id: 1,
+ timestamp: 1,
+ flags: 0,
+ cltv_expiry_delta: 42,
+ htlc_minimum_msat: 1_000,
+ htlc_maximum_msat: 10_000_000,
+ fee_base_msat: 800,
+ fee_proportional_millionths: 0,
+ excess_data: Vec::new()
+ });
+ update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
+ chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+ short_channel_id: 1,
+ timestamp: 1,
+ flags: 1,
+ cltv_expiry_delta: 42,
+ htlc_minimum_msat: 1_000,
+ htlc_maximum_msat: 10_000_000,
+ fee_base_msat: 800,
+ fee_proportional_millionths: 0,
+ excess_data: Vec::new()
+ });
+
+ add_channel(&gossip_sync, &secp_ctx, &privkeys[0], &privkeys[1],
+ ChannelFeatures::from_le_bytes(id_to_feature_flags(1)), 2);
+ update_channel(&gossip_sync, &secp_ctx, &privkeys[0], UnsignedChannelUpdate {
+ chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+ short_channel_id: 2,
+ timestamp: 2,
+ flags: 0,
+ cltv_expiry_delta: 42,
+ htlc_minimum_msat: 1_000,
+ htlc_maximum_msat: 10_000_000,
+ fee_base_msat: 800,
+ fee_proportional_millionths: 0,
+ excess_data: Vec::new()
+ });
+ update_channel(&gossip_sync, &secp_ctx, &privkeys[1], UnsignedChannelUpdate {
+ chain_hash: genesis_block(Network::Testnet).header.block_hash(),
+ short_channel_id: 2,
+ timestamp: 2,
+ flags: 1,
+ cltv_expiry_delta: 42,
+ htlc_minimum_msat: 1_000,
+ htlc_maximum_msat: 10_000_000,
+ fee_base_msat: 800,
+ fee_proportional_millionths: 0,
+ excess_data: Vec::new()
+ });
+
+ let dest_node_id = nodes[2];
+
+ let route_hint = RouteHint(vec![RouteHintHop {
+ src_node_id: our_node_id,
+ short_channel_id: 44,
+ fees: RoutingFees {
+ base_msat: 234,
+ proportional_millionths: 0,
+ },
+ cltv_expiry_delta: 10,
+ htlc_minimum_msat: None,
+ htlc_maximum_msat: Some(5_000_000),
+ },
+ RouteHintHop {
+ src_node_id: nodes[0],
+ short_channel_id: 45,
+ fees: RoutingFees {
+ base_msat: 123,
+ proportional_millionths: 0,
+ },
+ cltv_expiry_delta: 10,
+ htlc_minimum_msat: None,
+ htlc_maximum_msat: None,
+ }]);
+
+ let payment_params = PaymentParameters::from_node_id(dest_node_id, 42)
+ .with_route_hints(vec![route_hint]).unwrap()
+ .with_bolt11_features(channelmanager::provided_invoice_features(&config)).unwrap();
+ let route_params = RouteParameters::from_payment_params_and_value(
+ payment_params, amt_msat);
+
+ // First create an insufficient first hop for channel with SCID 1 and check we'd use the
+ // route hint.
+ let first_hop = get_channel_details(Some(1), nodes[0],
+ channelmanager::provided_init_features(&config), 999_999);
+ let first_hops = vec![first_hop];
+
+ let route = get_route(&our_node_id, &route_params.clone(), &network_graph.read_only(),
+ Some(&first_hops.iter().collect::<Vec<_>>()), Arc::clone(&logger), &scorer,
+ &Default::default(), &random_seed_bytes).unwrap();
+ assert_eq!(route.paths.len(), 1);
+ assert_eq!(route.get_total_amount(), amt_msat);
+ assert_eq!(route.paths[0].hops.len(), 2);
+ assert_eq!(route.paths[0].hops[0].short_channel_id, 44);
+ assert_eq!(route.paths[0].hops[1].short_channel_id, 45);
+ assert_eq!(route.get_total_fees(), 123);
+
+ // Now check we would trust our first hop info, i.e., fail if we detect the route hint is
+ // for a first hop channel.
+ let mut first_hop = get_channel_details(Some(1), nodes[0], channelmanager::provided_init_features(&config), 999_999);
+ first_hop.outbound_scid_alias = Some(44);
+ let first_hops = vec![first_hop];
+
+ let route_res = get_route(&our_node_id, &route_params.clone(), &network_graph.read_only(),
+ Some(&first_hops.iter().collect::<Vec<_>>()), Arc::clone(&logger), &scorer,
+ &Default::default(), &random_seed_bytes);
+ assert!(route_res.is_err());
+
+ // Finally check we'd use the first hop if has sufficient outbound capacity. But we'd stil
+ // use the cheaper second hop of the route hint.
+ let mut first_hop = get_channel_details(Some(1), nodes[0],
+ channelmanager::provided_init_features(&config), 10_000_000);
+ first_hop.outbound_scid_alias = Some(44);
+ let first_hops = vec![first_hop];
+
+ let route = get_route(&our_node_id, &route_params.clone(), &network_graph.read_only(),
+ Some(&first_hops.iter().collect::<Vec<_>>()), Arc::clone(&logger), &scorer,
+ &Default::default(), &random_seed_bytes).unwrap();
+ assert_eq!(route.paths.len(), 1);
+ assert_eq!(route.get_total_amount(), amt_msat);
+ assert_eq!(route.paths[0].hops.len(), 2);
+ assert_eq!(route.paths[0].hops[0].short_channel_id, 1);
+ assert_eq!(route.paths[0].hops[1].short_channel_id, 45);
+ assert_eq!(route.get_total_fees(), 123);
+ }
}
#[cfg(all(any(test, ldk_bench), not(feature = "no-std")))]
projects / rust-lightning / blobdiff