Onion messages: fix edge case where we are the introduction node

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

diff --git a/lightning/src/onion_message/functional_tests.rs b/lightning/src/onion_message/functional_tests.rs
index 5c623cf2f48a143a84a09c5eadc592d61ef21513..991f0d1c2650ab172a1d5e7c0bffb712f5b089c1 100644 (file)
--- a/lightning/src/onion_message/functional_tests.rs
+++ b/lightning/src/onion_message/functional_tests.rs
@@ -170,6 +170,20 @@ fn too_big_packet_error() {
        assert_eq!(err, SendError::TooBigPacket);
 }
 
+#[test]
+fn we_are_intro_node() {
+       // If we are sending straight to a blinded route and we are the introduction node, we need to
+       // advance the blinded route by 1 hop so the second hop is the new introduction node.
+       let nodes = create_nodes(3);
+       let test_msg = TestCustomMessage {};
+
+       let secp_ctx = Secp256k1::new();
+       let blinded_route = BlindedRoute::new(&[nodes[0].get_node_pk(), nodes[1].get_node_pk(), nodes[2].get_node_pk()], &*nodes[2].keys_manager, &secp_ctx).unwrap();
+
+       nodes[0].messenger.send_onion_message(&[], Destination::BlindedRoute(blinded_route), OnionMessageContents::Custom(test_msg.clone()), None).unwrap();
+       pass_along_path(&nodes, None);
+}
+
 #[test]
 fn invalid_blinded_route_error() {
        // Make sure we error as expected if a provided blinded route has 0 or 1 hops.