Fuzz test blinded payment pathfinding

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

diff --git a/fuzz/src/router.rs b/fuzz/src/router.rs
index abc6572d85ecc13bd39364d095025bf2736cd70d..653491024d5745d1e687e8ab16e1b46920db57c3 100644 (file)
--- a/fuzz/src/router.rs
+++ b/fuzz/src/router.rs
@@ -11,9 +11,12 @@ use bitcoin::blockdata::script::Builder;
 use bitcoin::blockdata::transaction::TxOut;
 use bitcoin::hash_types::BlockHash;
 
+use lightning::blinded_path::{BlindedHop, BlindedPath};
 use lightning::chain::transaction::OutPoint;
 use lightning::ln::channelmanager::{self, ChannelDetails, ChannelCounterparty};
+use lightning::ln::features::{BlindedHopFeatures, Bolt12InvoiceFeatures};
 use lightning::ln::msgs;
+use lightning::offers::invoice::BlindedPayInfo;
 use lightning::routing::gossip::{NetworkGraph, RoutingFees};
 use lightning::routing::utxo::{UtxoFuture, UtxoLookup, UtxoLookupError, UtxoResult};
 use lightning::routing::router::{find_route, PaymentParameters, RouteHint, RouteHintHop, RouteParameters};
@@ -315,7 +318,7 @@ pub fn do_test<Out: test_logger::Output>(data: &[u8], out: Out) {
                                net_graph.channel_failed_permanent(short_channel_id);
                        },
                        _ if node_pks.is_empty() => {},
-                       _ => {
+                       x if x < 250 => {
                                let mut first_hops_vec = Vec::new();
                                // Use macros here and in the blinded match arm to ensure values are fetched from the fuzz
                                // input in the same order, for better coverage.
@@ -330,6 +333,46 @@ pub fn do_test<Out: test_logger::Output>(data: &[u8], out: Out) {
                                        }
                                });
                        },
+                       x => {
+                               let mut first_hops_vec = Vec::new();
+                               let first_hops = first_hops!(first_hops_vec);
+                               let mut last_hops_unblinded = Vec::new();
+                               last_hops!(last_hops_unblinded);
+                               let dummy_pk = PublicKey::from_slice(&[2; 33]).unwrap();
+                               let last_hops: Vec<(BlindedPayInfo, BlindedPath)> = last_hops_unblinded.into_iter().map(|hint| {
+                                       let hop = &hint.0[0];
+                                       let payinfo = BlindedPayInfo {
+                                               fee_base_msat: hop.fees.base_msat,
+                                               fee_proportional_millionths: hop.fees.proportional_millionths,
+                                               htlc_minimum_msat: hop.htlc_minimum_msat.unwrap(),
+                                               htlc_maximum_msat: hop.htlc_minimum_msat.unwrap().saturating_mul(100),
+                                               cltv_expiry_delta: hop.cltv_expiry_delta,
+                                               features: BlindedHopFeatures::empty(),
+                                       };
+                                       let num_blinded_hops = x % 250;
+                                       let mut blinded_hops = Vec::new();
+                                       for _ in 0..num_blinded_hops {
+                                               blinded_hops.push(BlindedHop {
+                                                       blinded_node_id: dummy_pk,
+                                                       encrypted_payload: Vec::new()
+                                               });
+                                       }
+                                       (payinfo, BlindedPath {
+                                               introduction_node_id: hop.src_node_id,
+                                               blinding_point: dummy_pk,
+                                               blinded_hops,
+                                       })
+                               }).collect();
+                               let mut features = Bolt12InvoiceFeatures::empty();
+                               features.set_basic_mpp_optional();
+                               find_routes!(first_hops, vec![dummy_pk].iter(), |final_amt, _, _| {
+                                       RouteParameters {
+                                               payment_params: PaymentParameters::blinded(last_hops.clone())
+                                                       .with_bolt12_features(features.clone()).unwrap(),
+                                               final_value_msat: final_amt,
+                                       }
+                               });
+                       }
                }
        }
 }