+ // A test payment should succeed as the ChannelConfig has not been changed yet.
+ const PAYMENT_AMT: u64 = 40000;
+ let (route, payment_hash, payment_preimage, payment_secret) = if announced_channel {
+ get_route_and_payment_hash!(nodes[0], nodes[2], PAYMENT_AMT)
+ } else {
+ let hop_hints = vec![RouteHint(vec![RouteHintHop {
+ src_node_id: nodes[1].node.get_our_node_id(),
+ short_channel_id: channel_to_update.1,
+ fees: RoutingFees {
+ base_msat: default_config.forwarding_fee_base_msat,
+ proportional_millionths: default_config.forwarding_fee_proportional_millionths,
+ },
+ cltv_expiry_delta: default_config.cltv_expiry_delta,
+ htlc_maximum_msat: None,
+ htlc_minimum_msat: None,
+ }])];
+ let payment_params = PaymentParameters::from_node_id(*channel_to_update_counterparty, TEST_FINAL_CLTV)
+ .with_features(nodes[2].node.invoice_features())
+ .with_route_hints(hop_hints);
+ get_route_and_payment_hash!(nodes[0], nodes[2], payment_params, PAYMENT_AMT)
+ };
+ send_along_route_with_secret(&nodes[0], route.clone(), &[&[&nodes[1], &nodes[2]]], PAYMENT_AMT,
+ payment_hash, payment_secret);
+ claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage);
+
+ // Closure to force expiry of a channel's previous config.
+ let expire_prev_config = || {
+ for _ in 0..EXPIRE_PREV_CONFIG_TICKS {
+ nodes[1].node.timer_tick_occurred();
+ }
+ };
+
+ // Closure to update and retrieve the latest ChannelUpdate.
+ let update_and_get_channel_update = |config: &ChannelConfig, expect_new_update: bool,
+ prev_update: Option<&msgs::ChannelUpdate>, should_expire_prev_config: bool| -> Option<msgs::ChannelUpdate> {
+ nodes[1].node.update_channel_config(
+ channel_to_update_counterparty, &[channel_to_update.0], config,
+ ).unwrap();
+ let events = nodes[1].node.get_and_clear_pending_msg_events();
+ assert_eq!(events.len(), expect_new_update as usize);
+ if !expect_new_update {
+ return None;
+ }
+ let new_update = match &events[0] {
+ MessageSendEvent::BroadcastChannelUpdate { msg } => {
+ assert!(announced_channel);
+ msg.clone()
+ },
+ MessageSendEvent::SendChannelUpdate { node_id, msg } => {
+ assert_eq!(node_id, channel_to_update_counterparty);
+ assert!(!announced_channel);
+ msg.clone()
+ },
+ _ => panic!("expected Broadcast/SendChannelUpdate event"),
+ };
+ if prev_update.is_some() {
+ assert!(new_update.contents.timestamp > prev_update.unwrap().contents.timestamp)
+ }
+ if should_expire_prev_config {
+ expire_prev_config();
+ }
+ Some(new_update)
+ };
+
+ // We'll be attempting to route payments using the default ChannelUpdate for channels. This will
+ // lead to onion failures at the first hop once we update the ChannelConfig for the
+ // second hop.
+ let expect_onion_failure = |name: &str, error_code: u16, channel_update: &msgs::ChannelUpdate| {
+ let short_channel_id = channel_to_update.1;
+ let network_update = NetworkUpdate::ChannelUpdateMessage { msg: channel_update.clone() };
+ run_onion_failure_test(
+ name, 0, &nodes, &route, &payment_hash, &payment_secret, |_| {}, || {}, true,
+ Some(error_code), Some(network_update), Some(short_channel_id),
+ );
+ };
+
+ // Updates to cltv_expiry_delta below MIN_CLTV_EXPIRY_DELTA should fail with APIMisuseError.
+ let mut invalid_config = default_config.clone();
+ invalid_config.cltv_expiry_delta = 0;
+ match nodes[1].node.update_channel_config(
+ channel_to_update_counterparty, &[channel_to_update.0], &invalid_config,
+ ) {
+ Err(APIError::APIMisuseError{ .. }) => {},
+ _ => panic!("unexpected result applying invalid cltv_expiry_delta"),
+ }
+
+ // Increase the base fee which should trigger a new ChannelUpdate.
+ let mut config = nodes[1].node.list_usable_channels().iter()
+ .find(|channel| channel.channel_id == channel_to_update.0).unwrap()
+ .config.unwrap();
+ config.forwarding_fee_base_msat = u32::max_value();
+ let msg = update_and_get_channel_update(&config, true, None, false).unwrap();
+
+ // The old policy should still be in effect until a new block is connected.
+ send_along_route_with_secret(&nodes[0], route.clone(), &[&[&nodes[1], &nodes[2]]], PAYMENT_AMT,
+ payment_hash, payment_secret);
+ claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage);
+
+ // Connect a block, which should expire the previous config, leading to a failure when
+ // forwarding the HTLC.
+ expire_prev_config();
+ expect_onion_failure("fee_insufficient", UPDATE|12, &msg);
+
+ // Redundant updates should not trigger a new ChannelUpdate.
+ assert!(update_and_get_channel_update(&config, false, None, false).is_none());
+
+ // Similarly, updates that do not have an affect on ChannelUpdate should not trigger a new one.
+ config.force_close_avoidance_max_fee_satoshis *= 2;
+ assert!(update_and_get_channel_update(&config, false, None, false).is_none());
+
+ // Reset the base fee to the default and increase the proportional fee which should trigger a
+ // new ChannelUpdate.
+ config.forwarding_fee_base_msat = default_config.forwarding_fee_base_msat;
+ config.cltv_expiry_delta = u16::max_value();
+ let msg = update_and_get_channel_update(&config, true, Some(&msg), true).unwrap();
+ expect_onion_failure("incorrect_cltv_expiry", UPDATE|13, &msg);
+
+ // Reset the proportional fee and increase the CLTV expiry delta which should trigger a new
+ // ChannelUpdate.
+ config.cltv_expiry_delta = default_config.cltv_expiry_delta;
+ config.forwarding_fee_proportional_millionths = u32::max_value();
+ let msg = update_and_get_channel_update(&config, true, Some(&msg), true).unwrap();
+ expect_onion_failure("fee_insufficient", UPDATE|12, &msg);
+
+ // To test persistence of the updated config, we'll re-initialize the ChannelManager.
+ let config_after_restart = {
+ let chan_1_monitor_serialized = get_monitor!(nodes[1], other_channel.3).encode();
+ let chan_2_monitor_serialized = get_monitor!(nodes[1], channel_to_update.0).encode();
+ reload_node!(nodes[1], *nodes[1].node.get_current_default_configuration(), &nodes[1].node.encode(),
+ &[&chan_1_monitor_serialized, &chan_2_monitor_serialized], persister, chain_monitor, channel_manager_1_deserialized);
+ nodes[1].node.list_channels().iter()
+ .find(|channel| channel.channel_id == channel_to_update.0).unwrap()
+ .config.unwrap()