Add simple test for duplicate-payment_hash HTLC tracking

diff --git a/src/ln/channelmanager.rs b/src/ln/channelmanager.rs
index d4548ce621a516fca6ba5fdcb1b5a87213373f16..e111a53163cb3273c24c5fa46fe285435ea8b281 100644 (file)
--- a/src/ln/channelmanager.rs
+++ b/src/ln/channelmanager.rs
@@ -3061,6 +3061,32 @@ mod tests {
                }
        }
 
+       #[test]
+       fn duplicate_htlc_test() {
+               // Test that we accept duplicate payment_hash HTLCs across the network and that
+               // claiming/failing them are all separate and don't effect each other
+               let mut nodes = create_network(6);
+
+               // Create some initial channels to route via 3 to 4/5 from 0/1/2
+               create_announced_chan_between_nodes(&nodes, 0, 3);
+               create_announced_chan_between_nodes(&nodes, 1, 3);
+               create_announced_chan_between_nodes(&nodes, 2, 3);
+               create_announced_chan_between_nodes(&nodes, 3, 4);
+               create_announced_chan_between_nodes(&nodes, 3, 5);
+
+               let (payment_preimage, payment_hash) = route_payment(&nodes[0], &vec!(&nodes[3], &nodes[4])[..], 1000000);
+
+               *nodes[0].network_payment_count.borrow_mut() -= 1;
+               assert_eq!(route_payment(&nodes[1], &vec!(&nodes[3])[..], 1000000).0, payment_preimage);
+
+               *nodes[0].network_payment_count.borrow_mut() -= 1;
+               assert_eq!(route_payment(&nodes[2], &vec!(&nodes[3], &nodes[5])[..], 1000000).0, payment_preimage);
+
+               claim_payment(&nodes[0], &vec!(&nodes[3], &nodes[4])[..], payment_preimage);
+               fail_payment(&nodes[2], &vec!(&nodes[3], &nodes[5])[..], payment_hash);
+               claim_payment(&nodes[1], &vec!(&nodes[3])[..], payment_preimage);
+       }
+
        #[derive(PartialEq)]
        enum HTLCType { NONE, TIMEOUT, SUCCESS }
        fn test_txn_broadcast(node: &Node, chan: &(msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction), commitment_tx: Option<Transaction>, has_htlc_tx: HTLCType) -> Vec<Transaction> {