fn do_accept_underpaying_htlcs_config(num_mpp_parts: usize) {
let chanmon_cfgs = create_chanmon_cfgs(3);
let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
+ let max_in_flight_percent = 10;
let mut intercept_forwards_config = test_default_channel_config();
intercept_forwards_config.accept_intercept_htlcs = true;
+ intercept_forwards_config.channel_handshake_config.max_inbound_htlc_value_in_flight_percent_of_channel = max_in_flight_percent;
let mut underpay_config = test_default_channel_config();
underpay_config.channel_config.accept_underpaying_htlcs = true;
+ underpay_config.channel_handshake_config.max_inbound_htlc_value_in_flight_percent_of_channel = max_in_flight_percent;
let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, Some(intercept_forwards_config), Some(underpay_config)]);
let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
+ let amt_msat = 900_000;
+
let mut chan_ids = Vec::new();
for _ in 0..num_mpp_parts {
- let _ = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000, 0);
- let channel_id = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 2, 2_000_000, 0).0.channel_id;
+ // We choose the channel size so that there can be at most one part pending on each channel.
+ let channel_size = amt_msat / 1000 / num_mpp_parts as u64 * 100 / max_in_flight_percent as u64 + 100;
+ let _ = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, channel_size, 0);
+ let channel_id = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 2, channel_size, 0).0.channel_id;
chan_ids.push(channel_id);
}
// Send the initial payment.
- let amt_msat = 900_000;
let skimmed_fee_msat = 20;
let mut route_hints = Vec::new();
for _ in 0..num_mpp_parts {
// Create a new channel between C and D as A will refuse to retry on the existing one because
// it just failed.
- let chan_id_cd_2 = create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 1_000_000, 0).2;
+ create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 1_000_000, 0);
// Now retry the failed HTLC.
nodes[0].node.process_pending_htlc_forwards();
expect_pending_htlcs_forwardable!(nodes[2]);
check_added_monitors(&nodes[2], 1);
let cs_forward = SendEvent::from_node(&nodes[2]);
+ let cd_channel_used = cs_forward.msgs[0].channel_id;
nodes[3].node.handle_update_add_htlc(&nodes[2].node.get_our_node_id(), &cs_forward.msgs[0]);
commitment_signed_dance!(nodes[3], nodes[2], cs_forward.commitment_msg, false, true);
nodes[2].node.handle_update_fail_htlc(&nodes[3].node.get_our_node_id(), &ds_fail.update_fail_htlcs[0]);
commitment_signed_dance!(nodes[2], nodes[3], ds_fail.commitment_signed, false, true);
expect_pending_htlcs_forwardable_conditions(nodes[2].node.get_and_clear_pending_events(),
- &[HTLCDestination::NextHopChannel { node_id: Some(nodes[3].node.get_our_node_id()), channel_id: chan_id_cd_2 }]);
+ &[HTLCDestination::NextHopChannel { node_id: Some(nodes[3].node.get_our_node_id()), channel_id: cd_channel_used }]);
} else {
expect_pending_htlcs_forwardable!(nodes[3]);
expect_payment_claimable!(nodes[3], payment_hash, payment_secret, amt_msat);
_ => panic!()
}
}
+
+#[test]
+fn test_non_strict_forwarding() {
+ let chanmon_cfgs = create_chanmon_cfgs(3);
+ let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
+ let mut config = test_default_channel_config();
+ config.channel_handshake_config.max_inbound_htlc_value_in_flight_percent_of_channel = 100;
+ let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[Some(config), Some(config), Some(config)]);
+ let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
+
+ // Create a routing node with two outbound channels, each of which can forward 2 payments of
+ // the given value.
+ let payment_value = 1_500_000;
+ create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100_000, 0);
+ let (chan_update_1, _, channel_id_1, _) = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 4_950, 0);
+ let (chan_update_2, _, channel_id_2, _) = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 5_000, 0);
+
+ // Create a route once.
+ let payment_params = PaymentParameters::from_node_id(nodes[2].node.get_our_node_id(), TEST_FINAL_CLTV)
+ .with_bolt11_features(nodes[2].node.bolt11_invoice_features()).unwrap();
+ let route_params = RouteParameters::from_payment_params_and_value(payment_params, payment_value);
+ let route = functional_test_utils::get_route(&nodes[0], &route_params).unwrap();
+
+ // Send 4 payments over the same route.
+ for i in 0..4 {
+ let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[2], Some(payment_value), None);
+ nodes[0].node.send_payment_with_route(&route, payment_hash,
+ RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_hash.0)).unwrap();
+ check_added_monitors!(nodes[0], 1);
+ let mut msg_events = nodes[0].node.get_and_clear_pending_msg_events();
+ assert_eq!(msg_events.len(), 1);
+ let mut send_event = SendEvent::from_event(msg_events.remove(0));
+ nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &send_event.msgs[0]);
+ commitment_signed_dance!(nodes[1], nodes[0], &send_event.commitment_msg, false);
+
+ expect_pending_htlcs_forwardable!(nodes[1]);
+ check_added_monitors!(nodes[1], 1);
+ msg_events = nodes[1].node.get_and_clear_pending_msg_events();
+ assert_eq!(msg_events.len(), 1);
+ send_event = SendEvent::from_event(msg_events.remove(0));
+ // The HTLC will be forwarded over the most appropriate channel with the corresponding peer,
+ // applying non-strict forwarding.
+ // The channel with the least amount of outbound liquidity will be used to maximize the
+ // probability of being able to successfully forward a subsequent HTLC.
+ assert_eq!(send_event.msgs[0].channel_id, if i < 2 {
+ channel_id_1
+ } else {
+ channel_id_2
+ });
+ nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &send_event.msgs[0]);
+ commitment_signed_dance!(nodes[2], nodes[1], &send_event.commitment_msg, false);
+
+ expect_pending_htlcs_forwardable!(nodes[2]);
+ let events = nodes[2].node.get_and_clear_pending_events();
+ assert_eq!(events.len(), 1);
+ assert!(matches!(events[0], Event::PaymentClaimable { .. }));
+
+ claim_payment_along_route(
+ ClaimAlongRouteArgs::new(&nodes[0], &[&[&nodes[1], &nodes[2]]], payment_preimage)
+ );
+ }
+
+ // Send a 5th payment which will fail.
+ let (_, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[2], Some(payment_value), None);
+ nodes[0].node.send_payment_with_route(&route, payment_hash,
+ RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_hash.0)).unwrap();
+ check_added_monitors!(nodes[0], 1);
+ let mut msg_events = nodes[0].node.get_and_clear_pending_msg_events();
+ assert_eq!(msg_events.len(), 1);
+ let mut send_event = SendEvent::from_event(msg_events.remove(0));
+ nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &send_event.msgs[0]);
+ commitment_signed_dance!(nodes[1], nodes[0], &send_event.commitment_msg, false);
+
+ expect_pending_htlcs_forwardable!(nodes[1]);
+ check_added_monitors!(nodes[1], 1);
+ let routed_scid = route.paths[0].hops[1].short_channel_id;
+ let routed_channel_id = match routed_scid {
+ scid if scid == chan_update_1.contents.short_channel_id => channel_id_1,
+ scid if scid == chan_update_2.contents.short_channel_id => channel_id_2,
+ _ => panic!("Unexpected short channel id in route"),
+ };
+ // The failure to forward will refer to the channel given in the onion.
+ expect_pending_htlcs_forwardable_conditions(nodes[1].node.get_and_clear_pending_events(),
+ &[HTLCDestination::NextHopChannel { node_id: Some(nodes[2].node.get_our_node_id()), channel_id: routed_channel_id }]);
+
+ let updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
+ nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
+ commitment_signed_dance!(nodes[0], nodes[1], updates.commitment_signed, false);
+ let events = nodes[0].node.get_and_clear_pending_events();
+ expect_payment_failed_conditions_event(events, payment_hash, false, PaymentFailedConditions::new().blamed_scid(routed_scid));
+}
projects / rust-lightning / blobdiff