Track the amount spent on fees as payments are retried

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

diff --git a/lightning/src/ln/payment_tests.rs b/lightning/src/ln/payment_tests.rs
index 1b9836621e7761a3a0316c4f441ac4d2e826abbc..f685c375f38913c6fbedc9ce40a064d7e7373598 100644 (file)
--- a/lightning/src/ln/payment_tests.rs
+++ b/lightning/src/ln/payment_tests.rs
@@ -296,7 +296,7 @@ fn do_retry_with_no_persist(confirm_before_reload: bool) {
        let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
 
        let (_, _, chan_id, funding_tx) = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
-       create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
+       let (_, _, chan_id_2, _) = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
 
        // Serialize the ChannelManager prior to sending payments
        let nodes_0_serialized = nodes[0].node.encode();
@@ -445,7 +445,13 @@ fn do_retry_with_no_persist(confirm_before_reload: bool) {
        // Finally, retry the payment (which was reloaded from the ChannelMonitor when nodes[0] was
        // reloaded) via a route over the new channel, which work without issue and eventually be
        // received and claimed at the recipient just like any other payment.
-       let (new_route, _, _, _) = get_route_and_payment_hash!(nodes[0], nodes[2], 1_000_000);
+       let (mut new_route, _, _, _) = get_route_and_payment_hash!(nodes[0], nodes[2], 1_000_000);
+
+       // Update the fee on the middle hop to ensure PaymentSent events have the correct (retried) fee
+       // and not the original fee. We also update node[1]'s relevant config as
+       // do_claim_payment_along_route expects us to never overpay.
+       nodes[1].node.channel_state.lock().unwrap().by_id.get_mut(&chan_id_2).unwrap().config.forwarding_fee_base_msat += 100_000;
+       new_route.paths[0][0].fee_msat += 100_000;
 
        assert!(nodes[0].node.retry_payment(&new_route, payment_id_1).is_err()); // Shouldn't be allowed to retry a fulfilled payment
        nodes[0].node.retry_payment(&new_route, payment_id).unwrap();
@@ -453,7 +459,8 @@ fn do_retry_with_no_persist(confirm_before_reload: bool) {
        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]], 1_000_000, payment_hash, Some(payment_secret), events.pop().unwrap(), true, None);
-       claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], false, payment_preimage);
+       do_claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], false, payment_preimage);
+       expect_payment_sent!(nodes[0], payment_preimage, Some(new_route.paths[0][0].fee_msat));
 }
 
 #[test]