Don't remove failed payments when all paths fail

[rust-lightning] / lightning / src / ln / functional_tests.rs

diff --git a/lightning/src/ln/functional_tests.rs b/lightning/src/ln/functional_tests.rs
index 4ff5f1ea1540ab423ef1d413139d5c680d980809..a2a105758c5d171a95e6a5f88d2e3efb86f34bf7 100644 (file)
--- a/lightning/src/ln/functional_tests.rs
+++ b/lightning/src/ln/functional_tests.rs
@@ -4273,6 +4273,59 @@ fn mpp_retry() {
        claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], false, payment_preimage);
 }
 
+#[test]
+fn retry_single_path_payment() {
+       let chanmon_cfgs = create_chanmon_cfgs(3);
+       let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
+       let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
+       let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
+
+       let _chan_0 = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
+       let _chan_1 = create_announced_chan_between_nodes(&nodes, 2, 1, InitFeatures::known(), InitFeatures::known());
+       // Rebalance to find a route
+       send_payment(&nodes[2], &vec!(&nodes[1])[..], 3_000_000);
+
+       let logger = test_utils::TestLogger::new();
+       let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash!(nodes[2]);
+       let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
+       let route = get_route(&nodes[0].node.get_our_node_id(), &net_graph_msg_handler.network_graph, &nodes[2].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 100_000, TEST_FINAL_CLTV, &logger).unwrap();
+
+       // Rebalance so that the first hop fails.
+       send_payment(&nodes[1], &vec!(&nodes[2])[..], 2_000_000);
+
+       // Make sure the payment fails on the first hop.
+       let payment_id = nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
+       check_added_monitors!(nodes[0], 1);
+       let mut events = nodes[0].node.get_and_clear_pending_msg_events();
+       assert_eq!(events.len(), 1);
+       let mut payment_event = SendEvent::from_event(events.pop().unwrap());
+       nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
+       check_added_monitors!(nodes[1], 0);
+       commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false);
+       expect_pending_htlcs_forwardable!(nodes[1]);
+       expect_pending_htlcs_forwardable!(&nodes[1]);
+       let htlc_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
+       assert!(htlc_updates.update_add_htlcs.is_empty());
+       assert_eq!(htlc_updates.update_fail_htlcs.len(), 1);
+       assert!(htlc_updates.update_fulfill_htlcs.is_empty());
+       assert!(htlc_updates.update_fail_malformed_htlcs.is_empty());
+       check_added_monitors!(nodes[1], 1);
+       nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_updates.update_fail_htlcs[0]);
+       commitment_signed_dance!(nodes[0], nodes[1], htlc_updates.commitment_signed, false);
+       expect_payment_failed!(nodes[0], payment_hash, false);
+
+       // Rebalance the channel so the retry succeeds.
+       send_payment(&nodes[2], &vec!(&nodes[1])[..], 3_000_000);
+
+       // Retry the payment and make sure it succeeds.
+       nodes[0].node.retry_payment(&route, payment_id).unwrap();
+       check_added_monitors!(nodes[0], 1);
+       let mut events = nodes[0].node.get_and_clear_pending_msg_events();
+       assert_eq!(events.len(), 1);
+       pass_along_path(&nodes[0], &[&nodes[1], &nodes[2]], 100_000, payment_hash, Some(payment_secret), events.pop().unwrap(), true, None);
+       claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], false, payment_preimage);
+}
+
 #[test]
 fn test_dup_htlc_onchain_fails_on_reload() {
        // When a Channel is closed, any outbound HTLCs which were relayed through it are simply