diff --git a/lightning/src/ln/offers_tests.rs b/lightning/src/ln/offers_tests.rs index c7fb5f8fd59..fa9822c6e69 100644 --- a/lightning/src/ln/offers_tests.rs +++ b/lightning/src/ln/offers_tests.rs @@ -568,6 +568,95 @@ fn creates_and_pays_for_offer_using_two_hop_blinded_path() { expect_recent_payment!(david, RecentPaymentDetails::Fulfilled, payment_id); } +/// This test checks that when multiple potential introduction nodes are available for the payer, +/// multiple `invoice_request` messages are sent for the offer, each with a different `reply_path`. +#[test] +fn send_invoice_requests_with_distinct_reply_path() { + 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(7); + let node_cfgs = create_node_cfgs(7, &chanmon_cfgs); + + *node_cfgs[1].override_init_features.borrow_mut() = Some(features); + + let node_chanmgrs = create_node_chanmgrs( + 7, &node_cfgs, &[None, Some(accept_forward_cfg), None, None, None, None, None] + ); + let nodes = create_network(7, &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); + + // Introduce another potential introduction node, node[6], as a candidate + create_unannounced_chan_between_nodes_with_value(&nodes, 3, 6, 10_000_000, 1_000_000_000); + create_announced_chan_between_nodes_with_value(&nodes, 2, 6, 10_000_000, 1_000_000_000); + create_announced_chan_between_nodes_with_value(&nodes, 4, 6, 10_000_000, 1_000_000_000); + create_announced_chan_between_nodes_with_value(&nodes, 5, 6, 10_000_000, 1_000_000_000); + + let (alice, bob, charlie, david) = (&nodes[0], &nodes[1], &nodes[2], &nodes[3]); + let alice_id = alice.node.get_our_node_id(); + let bob_id = bob.node.get_our_node_id(); + let charlie_id = charlie.node.get_our_node_id(); + let david_id = david.node.get_our_node_id(); + + disconnect_peers(alice, &[charlie, david, &nodes[4], &nodes[5], &nodes[6]]); + disconnect_peers(david, &[bob, &nodes[4], &nodes[5]]); + + let offer = alice.node + .create_offer_builder(None) + .unwrap() + .amount_msats(10_000_000) + .build().unwrap(); + assert_ne!(offer.signing_pubkey(), Some(alice_id)); + assert!(!offer.paths().is_empty()); + for path in offer.paths() { + assert_eq!(path.introduction_node, IntroductionNode::NodeId(bob_id)); + } + + let payment_id = PaymentId([1; 32]); + david.node.pay_for_offer(&offer, None, None, None, payment_id, Retry::Attempts(0), None) + .unwrap(); + expect_recent_payment!(david, RecentPaymentDetails::AwaitingInvoice, payment_id); + connect_peers(david, bob); + + // Send, extract and verify the first Invoice Request message + let onion_message = david.onion_messenger.next_onion_message_for_peer(bob_id).unwrap(); + bob.onion_messenger.handle_onion_message(&david_id, &onion_message); + + connect_peers(alice, charlie); + + let onion_message = bob.onion_messenger.next_onion_message_for_peer(alice_id).unwrap(); + alice.onion_messenger.handle_onion_message(&bob_id, &onion_message); + + let (invoice_request, reply_path) = extract_invoice_request(alice, &onion_message); + assert_eq!(invoice_request.amount_msats(), None); + assert_ne!(invoice_request.payer_id(), david_id); + assert_eq!(reply_path.introduction_node, IntroductionNode::NodeId(charlie_id)); + + // Send, extract and verify the second Invoice Request message + let onion_message = david.onion_messenger.next_onion_message_for_peer(bob_id).unwrap(); + bob.onion_messenger.handle_onion_message(&david_id, &onion_message); + + let onion_message = bob.onion_messenger.next_onion_message_for_peer(alice_id).unwrap(); + alice.onion_messenger.handle_onion_message(&bob_id, &onion_message); + + let (invoice_request, reply_path) = extract_invoice_request(alice, &onion_message); + + assert_eq!(invoice_request.amount_msats(), None); + assert_ne!(invoice_request.payer_id(), david_id); + assert_eq!(reply_path.introduction_node, IntroductionNode::NodeId(nodes[6].node.get_our_node_id())); +} + /// Checks that a refund can be paid through blinded paths and that ephemeral pubkeys are used /// rather than exposing a node's pubkey. #[test]