Have TestRouter wrap DefaultRouter

TestRouter checks route and scoring expectations before delegating to
the standalone find_route function. Refactor it to wrap DefaultRouter
and delegate to it instead. This allows TestRouter to implement
create_blinded_payment_paths by delegating to DefaultRouter.

Author: jkczyz

lightning/src/ln/functional_test_utils.rs

@@ -620,7 +620,7 @@ impl<'a, 'b, 'c> Drop for Node<'a, 'b, 'c> {
 					node_signer: self.keys_manager,
 					signer_provider: self.keys_manager,
 					fee_estimator: &test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) },
-					router: &test_utils::TestRouter::new(Arc::new(network_graph), &scorer),
+					router: &test_utils::TestRouter::new(Arc::new(network_graph), &self.logger, &scorer),
 					chain_monitor: self.chain_monitor,
 					tx_broadcaster: &broadcaster,
 					logger: &self.logger,
@@ -2899,7 +2899,7 @@ pub fn create_node_cfgs_with_persisters<'a>(node_count: usize, chanmon_cfgs: &'a
 			logger: &chanmon_cfgs[i].logger,
 			tx_broadcaster: &chanmon_cfgs[i].tx_broadcaster,
 			fee_estimator: &chanmon_cfgs[i].fee_estimator,
-			router: test_utils::TestRouter::new(network_graph.clone(), &chanmon_cfgs[i].scorer),
+			router: test_utils::TestRouter::new(network_graph.clone(), &chanmon_cfgs[i].logger, &chanmon_cfgs[i].scorer),
 			message_router: test_utils::TestMessageRouter::new(network_graph.clone()),
 			chain_monitor,
 			keys_manager: &chanmon_cfgs[i].keys_manager,

lightning/src/ln/functional_tests.rs

@@ -5537,7 +5537,7 @@ fn test_key_derivation_params() {
 	let chain_monitor = test_utils::TestChainMonitor::new(Some(&chanmon_cfgs[0].chain_source), &chanmon_cfgs[0].tx_broadcaster, &chanmon_cfgs[0].logger, &chanmon_cfgs[0].fee_estimator, &chanmon_cfgs[0].persister, &keys_manager);
 	let network_graph = Arc::new(NetworkGraph::new(Network::Testnet, &chanmon_cfgs[0].logger));
 	let scorer = RwLock::new(test_utils::TestScorer::new());
-	let router = test_utils::TestRouter::new(network_graph.clone(), &scorer);
+	let router = test_utils::TestRouter::new(network_graph.clone(), &chanmon_cfgs[0].logger, &scorer);
 	let message_router = test_utils::TestMessageRouter::new(network_graph.clone());
 	let node = NodeCfg { chain_source: &chanmon_cfgs[0].chain_source, logger: &chanmon_cfgs[0].logger, tx_broadcaster: &chanmon_cfgs[0].tx_broadcaster, fee_estimator: &chanmon_cfgs[0].fee_estimator, router, message_router, chain_monitor, keys_manager: &keys_manager, network_graph, node_seed: seed, override_init_features: alloc::rc::Rc::new(core::cell::RefCell::new(None)) };
 	let mut node_cfgs = create_node_cfgs(3, &chanmon_cfgs);

lightning/src/ln/outbound_payment.rs

@@ -1876,7 +1876,7 @@ mod tests {
 		let logger = test_utils::TestLogger::new();
 		let network_graph = Arc::new(NetworkGraph::new(Network::Testnet, &logger));
 		let scorer = RwLock::new(test_utils::TestScorer::new());
-		let router = test_utils::TestRouter::new(network_graph, &scorer);
+		let router = test_utils::TestRouter::new(network_graph, &logger, &scorer);
 		let secp_ctx = Secp256k1::new();
 		let keys_manager = test_utils::TestKeysInterface::new(&[0; 32], Network::Testnet);
 
@@ -1920,7 +1920,7 @@ mod tests {
 		let logger = test_utils::TestLogger::new();
 		let network_graph = Arc::new(NetworkGraph::new(Network::Testnet, &logger));
 		let scorer = RwLock::new(test_utils::TestScorer::new());
-		let router = test_utils::TestRouter::new(network_graph, &scorer);
+		let router = test_utils::TestRouter::new(network_graph, &logger, &scorer);
 		let secp_ctx = Secp256k1::new();
 		let keys_manager = test_utils::TestKeysInterface::new(&[0; 32], Network::Testnet);
 
@@ -1959,7 +1959,7 @@ mod tests {
 		let logger = test_utils::TestLogger::new();
 		let network_graph = Arc::new(NetworkGraph::new(Network::Testnet, &logger));
 		let scorer = RwLock::new(test_utils::TestScorer::new());
-		let router = test_utils::TestRouter::new(network_graph, &scorer);
+		let router = test_utils::TestRouter::new(network_graph, &logger, &scorer);
 		let secp_ctx = Secp256k1::new();
 		let keys_manager = test_utils::TestKeysInterface::new(&[0; 32], Network::Testnet);
 
@@ -2166,7 +2166,7 @@ mod tests {
 		let logger = test_utils::TestLogger::new();
 		let network_graph = Arc::new(NetworkGraph::new(Network::Testnet, &logger));
 		let scorer = RwLock::new(test_utils::TestScorer::new());
-		let router = test_utils::TestRouter::new(network_graph, &scorer);
+		let router = test_utils::TestRouter::new(network_graph, &logger, &scorer);
 		let keys_manager = test_utils::TestKeysInterface::new(&[0; 32], Network::Testnet);
 
 		let pending_events = Mutex::new(VecDeque::new());
@@ -2217,7 +2217,7 @@ mod tests {
 		let logger = test_utils::TestLogger::new();
 		let network_graph = Arc::new(NetworkGraph::new(Network::Testnet, &logger));
 		let scorer = RwLock::new(test_utils::TestScorer::new());
-		let router = test_utils::TestRouter::new(network_graph, &scorer);
+		let router = test_utils::TestRouter::new(network_graph, &logger, &scorer);
 		let keys_manager = test_utils::TestKeysInterface::new(&[0; 32], Network::Testnet);
 
 		let pending_events = Mutex::new(VecDeque::new());
@@ -2276,7 +2276,7 @@ mod tests {
 		let logger = test_utils::TestLogger::new();
 		let network_graph = Arc::new(NetworkGraph::new(Network::Testnet, &logger));
 		let scorer = RwLock::new(test_utils::TestScorer::new());
-		let router = test_utils::TestRouter::new(network_graph, &scorer);
+		let router = test_utils::TestRouter::new(network_graph, &logger, &scorer);
 		let keys_manager = test_utils::TestKeysInterface::new(&[0; 32], Network::Testnet);
 
 		let pending_events = Mutex::new(VecDeque::new());
@@ -2335,7 +2335,7 @@ mod tests {
 		let logger = test_utils::TestLogger::new();
 		let network_graph = Arc::new(NetworkGraph::new(Network::Testnet, &logger));
 		let scorer = RwLock::new(test_utils::TestScorer::new());
-		let router = test_utils::TestRouter::new(network_graph, &scorer);
+		let router = test_utils::TestRouter::new(network_graph, &logger, &scorer);
 		let keys_manager = test_utils::TestKeysInterface::new(&[0; 32], Network::Testnet);
 
 		let pending_events = Mutex::new(VecDeque::new());

lightning/src/util/test_utils.rs

@@ -35,7 +35,7 @@ use crate::offers::invoice_request::UnsignedInvoiceRequest;
 use crate::onion_message::{DefaultMessageRouter, Destination, MessageRouter, OnionMessagePath};
 use crate::routing::gossip::{EffectiveCapacity, NetworkGraph, NodeId, RoutingFees};
 use crate::routing::utxo::{UtxoLookup, UtxoLookupError, UtxoResult};
-use crate::routing::router::{find_route, InFlightHtlcs, Path, Route, RouteParameters, RouteHintHop, Router, ScorerAccountingForInFlightHtlcs};
+use crate::routing::router::{DefaultRouter, InFlightHtlcs, Path, Route, RouteParameters, RouteHintHop, Router, ScorerAccountingForInFlightHtlcs};
 use crate::routing::scoring::{ChannelUsage, ScoreUpdate, ScoreLookUp};
 use crate::sync::RwLock;
 use crate::util::config::UserConfig;
@@ -104,14 +104,29 @@ impl chaininterface::FeeEstimator for TestFeeEstimator {
 }
 
 pub struct TestRouter<'a> {
+	pub router: DefaultRouter<
+		Arc<NetworkGraph<&'a TestLogger>>,
+		&'a TestLogger,
+		&'a RwLock<TestScorer>,
+		(),
+		TestScorer,
+	>,
 	pub network_graph: Arc<NetworkGraph<&'a TestLogger>>,
 	pub next_routes: Mutex<VecDeque<(RouteParameters, Result<Route, LightningError>)>>,
 	pub scorer: &'a RwLock<TestScorer>,
 }
 
 impl<'a> TestRouter<'a> {
-	pub fn new(network_graph: Arc<NetworkGraph<&'a TestLogger>>, scorer: &'a RwLock<TestScorer>) -> Self {
-		Self { network_graph, next_routes: Mutex::new(VecDeque::new()), scorer }
+	pub fn new(
+		network_graph: Arc<NetworkGraph<&'a TestLogger>>, logger: &'a TestLogger,
+		scorer: &'a RwLock<TestScorer>
+	) -> Self {
+		Self {
+			router: DefaultRouter::new(network_graph.clone(), logger, [42u8; 32], scorer, ()),
+			network_graph,
+			next_routes: Mutex::new(VecDeque::new()),
+			scorer,
+		}
 	}
 
 	pub fn expect_find_route(&self, query: RouteParameters, result: Result<Route, LightningError>) {
@@ -185,38 +200,36 @@ impl<'a> Router for TestRouter<'a> {
 			}
 			return find_route_res;
 		}
-		let logger = TestLogger::new();
-		find_route(
-			payer, params, &self.network_graph, first_hops, &logger,
-			&ScorerAccountingForInFlightHtlcs::new(self.scorer.read().unwrap(), &inflight_htlcs), &Default::default(),
-			&[42; 32]
-		)
+
+		self.router.find_route(payer, params, first_hops, inflight_htlcs)
 	}
 
 	fn create_blinded_payment_paths<
 		ES: EntropySource + ?Sized, T: secp256k1::Signing + secp256k1::Verification
 	>(
-		&self, _recipient: PublicKey, _first_hops: Vec<ChannelDetails>, _tlvs: ReceiveTlvs,
-		_amount_msats: u64, _entropy_source: &ES, _secp_ctx: &Secp256k1<T>
+		&self, recipient: PublicKey, first_hops: Vec<ChannelDetails>, tlvs: ReceiveTlvs,
+		amount_msats: u64, entropy_source: &ES, secp_ctx: &Secp256k1<T>
 	) -> Result<Vec<(BlindedPayInfo, BlindedPath)>, ()> {
-		unreachable!()
+		self.router.create_blinded_payment_paths(
+			recipient, first_hops, tlvs, amount_msats, entropy_source, secp_ctx
+		)
 	}
 }
 
 impl<'a> MessageRouter for TestRouter<'a> {
 	fn find_path(
-		&self, _sender: PublicKey, _peers: Vec<PublicKey>, _destination: Destination
+		&self, sender: PublicKey, peers: Vec<PublicKey>, destination: Destination
 	) -> Result<OnionMessagePath, ()> {
-		unreachable!()
+		self.router.find_path(sender, peers, destination)
 	}
 
 	fn create_blinded_paths<
 		ES: EntropySource + ?Sized, T: secp256k1::Signing + secp256k1::Verification
 	>(
-		&self, _recipient: PublicKey, _peers: Vec<PublicKey>, _entropy_source: &ES,
-		_secp_ctx: &Secp256k1<T>
+		&self, recipient: PublicKey, peers: Vec<PublicKey>, entropy_source: &ES,
+		secp_ctx: &Secp256k1<T>
 	) -> Result<Vec<BlindedPath>, ()> {
-		unreachable!()
+		self.router.create_blinded_paths(recipient, peers, entropy_source, secp_ctx)
 	}
 }