Allow nodes to be avoided during pathfinding

[rust-lightning] / lightning / src / routing / router.rs

diff --git a/lightning/src/routing/router.rs b/lightning/src/routing/router.rs
index 634282d6c4b1f202fd0867312fc3dd83fc9b57fb..26e00319fbdb3b4f2e45fab8d35f51fea576773f 100644 (file)
--- a/lightning/src/routing/router.rs
+++ b/lightning/src/routing/router.rs
@@ -1878,7 +1878,7 @@ mod tests {
        use routing::router::{get_route, build_route_from_hops_internal, add_random_cltv_offset, default_node_features,
                PaymentParameters, Route, RouteHint, RouteHintHop, RouteHop, RoutingFees,
                DEFAULT_MAX_TOTAL_CLTV_EXPIRY_DELTA, MAX_PATH_LENGTH_ESTIMATE};
-       use routing::scoring::{ChannelUsage, Score};
+       use routing::scoring::{ChannelUsage, Score, ProbabilisticScorer, ProbabilisticScoringParameters};
        use chain::transaction::OutPoint;
        use chain::keysinterface::KeysInterface;
        use ln::features::{ChannelFeatures, InitFeatures, InvoiceFeatures, NodeFeatures};
@@ -5713,6 +5713,33 @@ mod tests {
                        }
                }
        }
+
+       #[test]
+       fn avoids_banned_nodes() {
+               let (secp_ctx, network_graph, _, _, logger) = build_line_graph();
+               let (_, our_id, _, nodes) = get_nodes(&secp_ctx);
+
+               let keys_manager = test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
+               let random_seed_bytes = keys_manager.get_secure_random_bytes();
+
+               let scorer_params = ProbabilisticScoringParameters::default();
+               let mut scorer = ProbabilisticScorer::new(scorer_params, Arc::clone(&network_graph), Arc::clone(&logger));
+
+               // First check we can get a route.
+               let payment_params = PaymentParameters::from_node_id(nodes[10]);
+               let route = get_route(&our_id, &payment_params, &network_graph.read_only(), None, 100, 42, Arc::clone(&logger), &scorer, &random_seed_bytes);
+               assert!(route.is_ok());
+
+               // Then check that we can't get a route if we ban an intermediate node.
+               scorer.add_banned(&NodeId::from_pubkey(&nodes[3]));
+               let route = get_route(&our_id, &payment_params, &network_graph.read_only(), None, 100, 42, Arc::clone(&logger), &scorer, &random_seed_bytes);
+               assert!(route.is_err());
+
+               // Finally make sure we can route again, when we remove the ban.
+               scorer.remove_banned(&NodeId::from_pubkey(&nodes[3]));
+               let route = get_route(&our_id, &payment_params, &network_graph.read_only(), None, 100, 42, Arc::clone(&logger), &scorer, &random_seed_bytes);
+               assert!(route.is_ok());
+       }
 }
 
 #[cfg(all(test, not(feature = "no-std")))]