1 // This file is Copyright its original authors, visible in version control
4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
7 // You may not use this file except in accordance with one or both of these
10 use bitcoin::secp256k1::{PublicKey, Secp256k1, SecretKey};
11 use crate::blinded_path::BlindedPath;
12 use crate::blinded_path::payment::{ForwardNode, ForwardTlvs, PaymentConstraints, PaymentRelay, ReceiveTlvs};
13 use crate::events::{Event, HTLCDestination, MessageSendEvent, MessageSendEventsProvider, PaymentFailureReason};
14 use crate::ln::PaymentSecret;
15 use crate::ln::channelmanager;
16 use crate::ln::channelmanager::{PaymentId, RecipientOnionFields};
17 use crate::ln::features::BlindedHopFeatures;
18 use crate::ln::functional_test_utils::*;
20 use crate::ln::msgs::ChannelMessageHandler;
21 use crate::ln::onion_utils;
22 use crate::ln::onion_utils::INVALID_ONION_BLINDING;
23 use crate::ln::outbound_payment::Retry;
24 use crate::offers::invoice::BlindedPayInfo;
25 use crate::prelude::*;
26 use crate::routing::router::{Payee, PaymentParameters, RouteParameters};
27 use crate::util::config::UserConfig;
28 use crate::util::test_utils;
30 fn blinded_payment_path(
31 payment_secret: PaymentSecret, node_ids: Vec<PublicKey>,
32 channel_upds: &[&msgs::UnsignedChannelUpdate], keys_manager: &test_utils::TestKeysInterface
33 ) -> (BlindedPayInfo, BlindedPath) {
34 let mut intermediate_nodes = Vec::new();
35 for (node_id, chan_upd) in node_ids.iter().zip(channel_upds) {
36 intermediate_nodes.push(ForwardNode {
39 short_channel_id: chan_upd.short_channel_id,
40 payment_relay: PaymentRelay {
41 cltv_expiry_delta: chan_upd.cltv_expiry_delta,
42 fee_proportional_millionths: chan_upd.fee_proportional_millionths,
43 fee_base_msat: chan_upd.fee_base_msat,
45 payment_constraints: PaymentConstraints {
46 max_cltv_expiry: u32::max_value(),
47 htlc_minimum_msat: chan_upd.htlc_minimum_msat,
49 features: BlindedHopFeatures::empty(),
51 htlc_maximum_msat: chan_upd.htlc_maximum_msat,
54 let payee_tlvs = ReceiveTlvs {
56 payment_constraints: PaymentConstraints {
57 max_cltv_expiry: u32::max_value(),
58 htlc_minimum_msat: channel_upds.last().unwrap().htlc_minimum_msat,
61 let mut secp_ctx = Secp256k1::new();
62 BlindedPath::new_for_payment(
63 &intermediate_nodes[..], *node_ids.last().unwrap(), payee_tlvs,
64 channel_upds.last().unwrap().htlc_maximum_msat, TEST_FINAL_CLTV as u16, keys_manager, &secp_ctx
68 pub fn get_blinded_route_parameters(
69 amt_msat: u64, payment_secret: PaymentSecret, node_ids: Vec<PublicKey>,
70 channel_upds: &[&msgs::UnsignedChannelUpdate], keys_manager: &test_utils::TestKeysInterface
71 ) -> RouteParameters {
72 RouteParameters::from_payment_params_and_value(
73 PaymentParameters::blinded(vec![
74 blinded_payment_path(payment_secret, node_ids, channel_upds, keys_manager)
80 fn one_hop_blinded_path() {
81 do_one_hop_blinded_path(true);
82 do_one_hop_blinded_path(false);
85 fn do_one_hop_blinded_path(success: bool) {
86 let chanmon_cfgs = create_chanmon_cfgs(2);
87 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
88 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
89 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
90 let chan_upd = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0).0.contents;
93 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[1], Some(amt_msat), None);
94 let payee_tlvs = ReceiveTlvs {
96 payment_constraints: PaymentConstraints {
97 max_cltv_expiry: u32::max_value(),
98 htlc_minimum_msat: chan_upd.htlc_minimum_msat,
101 let mut secp_ctx = Secp256k1::new();
102 let blinded_path = BlindedPath::one_hop_for_payment(
103 nodes[1].node.get_our_node_id(), payee_tlvs, TEST_FINAL_CLTV as u16,
104 &chanmon_cfgs[1].keys_manager, &secp_ctx
107 let route_params = RouteParameters::from_payment_params_and_value(
108 PaymentParameters::blinded(vec![blinded_path]),
111 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(),
112 PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
113 check_added_monitors(&nodes[0], 1);
114 pass_along_route(&nodes[0], &[&[&nodes[1]]], amt_msat, payment_hash, payment_secret);
116 claim_payment(&nodes[0], &[&nodes[1]], payment_preimage);
118 fail_payment(&nodes[0], &[&nodes[1]], payment_hash);
123 fn mpp_to_one_hop_blinded_path() {
124 let chanmon_cfgs = create_chanmon_cfgs(4);
125 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
126 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
127 let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
128 let mut secp_ctx = Secp256k1::new();
130 create_announced_chan_between_nodes(&nodes, 0, 1);
131 create_announced_chan_between_nodes(&nodes, 0, 2);
132 let chan_upd_1_3 = create_announced_chan_between_nodes(&nodes, 1, 3).0.contents;
133 create_announced_chan_between_nodes(&nodes, 2, 3).0.contents;
135 let amt_msat = 15_000_000;
136 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[3], Some(amt_msat), None);
137 let payee_tlvs = ReceiveTlvs {
139 payment_constraints: PaymentConstraints {
140 max_cltv_expiry: u32::max_value(),
141 htlc_minimum_msat: chan_upd_1_3.htlc_minimum_msat,
144 let blinded_path = BlindedPath::one_hop_for_payment(
145 nodes[3].node.get_our_node_id(), payee_tlvs, TEST_FINAL_CLTV as u16,
146 &chanmon_cfgs[3].keys_manager, &secp_ctx
149 let bolt12_features =
150 channelmanager::provided_bolt12_invoice_features(&UserConfig::default());
151 let route_params = RouteParameters::from_payment_params_and_value(
152 PaymentParameters::blinded(vec![blinded_path]).with_bolt12_features(bolt12_features).unwrap(),
155 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
156 check_added_monitors(&nodes[0], 2);
158 let expected_route: &[&[&Node]] = &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]];
159 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
160 assert_eq!(events.len(), 2);
162 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
163 pass_along_path(&nodes[0], expected_route[0], amt_msat, payment_hash.clone(),
164 Some(payment_secret), ev.clone(), false, None);
166 let ev = remove_first_msg_event_to_node(&nodes[2].node.get_our_node_id(), &mut events);
167 pass_along_path(&nodes[0], expected_route[1], amt_msat, payment_hash.clone(),
168 Some(payment_secret), ev.clone(), true, None);
169 claim_payment_along_route(&nodes[0], expected_route, false, payment_preimage);
173 fn mpp_to_three_hop_blinded_paths() {
174 let chanmon_cfgs = create_chanmon_cfgs(6);
175 let node_cfgs = create_node_cfgs(6, &chanmon_cfgs);
176 let node_chanmgrs = create_node_chanmgrs(6, &node_cfgs, &[None, None, None, None, None, None]);
177 let nodes = create_network(6, &node_cfgs, &node_chanmgrs);
179 // Create this network topology so node 0 MPP's over 2 3-hop blinded paths:
185 create_announced_chan_between_nodes(&nodes, 0, 1);
186 create_announced_chan_between_nodes(&nodes, 0, 2);
187 let chan_upd_1_3 = create_announced_chan_between_nodes(&nodes, 1, 3).0.contents;
188 let chan_upd_2_4 = create_announced_chan_between_nodes(&nodes, 2, 4).0.contents;
189 let chan_upd_3_5 = create_announced_chan_between_nodes(&nodes, 3, 5).0.contents;
190 let chan_upd_4_5 = create_announced_chan_between_nodes(&nodes, 4, 5).0.contents;
192 let amt_msat = 15_000_000;
193 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[5], Some(amt_msat), None);
195 let path_1_params = get_blinded_route_parameters(
196 amt_msat, payment_secret, vec![
197 nodes[1].node.get_our_node_id(), nodes[3].node.get_our_node_id(),
198 nodes[5].node.get_our_node_id()
199 ], &[&chan_upd_1_3, &chan_upd_3_5], &chanmon_cfgs[5].keys_manager
201 let path_2_params = get_blinded_route_parameters(
202 amt_msat, payment_secret, vec![
203 nodes[2].node.get_our_node_id(), nodes[4].node.get_our_node_id(),
204 nodes[5].node.get_our_node_id()
205 ], &[&chan_upd_2_4, &chan_upd_4_5], &chanmon_cfgs[5].keys_manager
207 let pay_params = PaymentParameters::blinded(
209 path_1_params.payment_params.payee.blinded_route_hints()[0].clone(),
210 path_2_params.payment_params.payee.blinded_route_hints()[0].clone()
213 .with_bolt12_features(channelmanager::provided_bolt12_invoice_features(&UserConfig::default()))
215 RouteParameters::from_payment_params_and_value(pay_params, amt_msat)
218 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(),
219 PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
220 check_added_monitors(&nodes[0], 2);
222 let expected_route: &[&[&Node]] = &[&[&nodes[1], &nodes[3], &nodes[5]], &[&nodes[2], &nodes[4], &nodes[5]]];
223 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
224 assert_eq!(events.len(), 2);
226 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
227 pass_along_path(&nodes[0], expected_route[0], amt_msat, payment_hash.clone(),
228 Some(payment_secret), ev.clone(), false, None);
230 let ev = remove_first_msg_event_to_node(&nodes[2].node.get_our_node_id(), &mut events);
231 pass_along_path(&nodes[0], expected_route[1], amt_msat, payment_hash.clone(),
232 Some(payment_secret), ev.clone(), true, None);
233 claim_payment_along_route(&nodes[0], expected_route, false, payment_preimage);
236 enum ForwardCheckFail {
237 // Fail a check on the inbound onion payload. In this case, we underflow when calculating the
238 // outgoing cltv_expiry.
240 // The forwarding node's payload is encoded as a receive, i.e. the next hop HMAC is [0; 32].
241 ForwardPayloadEncodedAsReceive,
242 // Fail a check on the outbound channel. In this case, our next-hop peer is offline.
243 OutboundChannelCheck,
247 fn forward_checks_failure() {
248 do_forward_checks_failure(ForwardCheckFail::InboundOnionCheck, true);
249 do_forward_checks_failure(ForwardCheckFail::InboundOnionCheck, false);
250 do_forward_checks_failure(ForwardCheckFail::ForwardPayloadEncodedAsReceive, true);
251 do_forward_checks_failure(ForwardCheckFail::ForwardPayloadEncodedAsReceive, false);
252 do_forward_checks_failure(ForwardCheckFail::OutboundChannelCheck, true);
253 do_forward_checks_failure(ForwardCheckFail::OutboundChannelCheck, false);
256 fn do_forward_checks_failure(check: ForwardCheckFail, intro_fails: bool) {
257 // Ensure we'll fail backwards properly if a forwarding check fails on initial update_add
259 let chanmon_cfgs = create_chanmon_cfgs(4);
260 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
261 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
262 let mut nodes = create_network(4, &node_cfgs, &node_chanmgrs);
263 // We need the session priv to construct a bogus onion packet later.
264 *nodes[0].keys_manager.override_random_bytes.lock().unwrap() = Some([3; 32]);
265 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
266 let chan_upd_1_2 = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0).0.contents;
267 let chan_upd_2_3 = create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 1_000_000, 0).0.contents;
270 let (_, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[3], Some(amt_msat), None);
271 let route_params = get_blinded_route_parameters(amt_msat, payment_secret,
272 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(),
273 &[&chan_upd_1_2, &chan_upd_2_3], &chanmon_cfgs[3].keys_manager);
275 let route = get_route(&nodes[0], &route_params).unwrap();
276 node_cfgs[0].router.expect_find_route(route_params.clone(), Ok(route.clone()));
277 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
278 check_added_monitors(&nodes[0], 1);
280 macro_rules! cause_error {
281 ($src_node_idx: expr, $target_node_idx: expr, $update_add: expr) => {
283 ForwardCheckFail::InboundOnionCheck => {
284 $update_add.cltv_expiry = 10; // causes outbound CLTV expiry to underflow
286 ForwardCheckFail::ForwardPayloadEncodedAsReceive => {
287 let session_priv = SecretKey::from_slice(&[3; 32]).unwrap();
288 let onion_keys = onion_utils::construct_onion_keys(&Secp256k1::new(), &route.paths[0], &session_priv).unwrap();
289 let cur_height = nodes[0].best_block_info().1;
290 let (mut onion_payloads, ..) = onion_utils::build_onion_payloads(
291 &route.paths[0], amt_msat, RecipientOnionFields::spontaneous_empty(), cur_height, &None).unwrap();
292 // Remove the receive payload so the blinded forward payload is encoded as a final payload
293 // (i.e. next_hop_hmac == [0; 32])
294 onion_payloads.pop();
295 if $target_node_idx + 1 < nodes.len() {
296 onion_payloads.pop();
298 $update_add.onion_routing_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, [0; 32], &payment_hash).unwrap();
300 ForwardCheckFail::OutboundChannelCheck => {
301 // The intro node will see that the next-hop peer is disconnected and fail the HTLC backwards.
302 nodes[$src_node_idx].node.peer_disconnected(&nodes[$target_node_idx].node.get_our_node_id());
308 let mut updates_0_1 = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
309 let update_add = &mut updates_0_1.update_add_htlcs[0];
312 cause_error!(1, 2, update_add);
315 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &update_add);
316 check_added_monitors!(nodes[1], 0);
317 do_commitment_signed_dance(&nodes[1], &nodes[0], &updates_0_1.commitment_signed, true, true);
320 let mut updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
321 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
322 do_commitment_signed_dance(&nodes[0], &nodes[1], &updates.commitment_signed, false, false);
323 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
324 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
328 expect_pending_htlcs_forwardable!(nodes[1]);
329 check_added_monitors!(nodes[1], 1);
331 let mut updates_1_2 = get_htlc_update_msgs!(nodes[1], nodes[2].node.get_our_node_id());
332 let mut update_add = &mut updates_1_2.update_add_htlcs[0];
334 cause_error!(2, 3, update_add);
336 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &update_add);
337 check_added_monitors!(nodes[2], 0);
338 do_commitment_signed_dance(&nodes[2], &nodes[1], &updates_1_2.commitment_signed, true, true);
340 let mut updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
341 let update_malformed = &mut updates.update_fail_malformed_htlcs[0];
342 assert_eq!(update_malformed.failure_code, INVALID_ONION_BLINDING);
343 assert_eq!(update_malformed.sha256_of_onion, [0; 32]);
345 // Ensure the intro node will properly blind the error if its downstream node failed to do so.
346 update_malformed.sha256_of_onion = [1; 32];
347 update_malformed.failure_code = INVALID_ONION_BLINDING ^ 1;
348 nodes[1].node.handle_update_fail_malformed_htlc(&nodes[2].node.get_our_node_id(), update_malformed);
349 do_commitment_signed_dance(&nodes[1], &nodes[2], &updates.commitment_signed, true, false);
351 let mut updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
352 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
353 do_commitment_signed_dance(&nodes[0], &nodes[1], &updates.commitment_signed, false, false);
354 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
355 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
359 fn failed_backwards_to_intro_node() {
360 // Ensure the intro node will error backwards properly even if the downstream node did not blind
362 let chanmon_cfgs = create_chanmon_cfgs(3);
363 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
364 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
365 let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
366 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
367 let chan_upd_1_2 = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0).0.contents;
370 let (_, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[2], Some(amt_msat), None);
371 let route_params = get_blinded_route_parameters(amt_msat, payment_secret,
372 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(), &[&chan_upd_1_2],
373 &chanmon_cfgs[2].keys_manager);
375 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
376 check_added_monitors(&nodes[0], 1);
378 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
379 assert_eq!(events.len(), 1);
380 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
381 let mut payment_event = SendEvent::from_event(ev);
383 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
384 check_added_monitors!(nodes[1], 0);
385 do_commitment_signed_dance(&nodes[1], &nodes[0], &payment_event.commitment_msg, false, false);
386 expect_pending_htlcs_forwardable!(nodes[1]);
387 check_added_monitors!(&nodes[1], 1);
389 let mut events = nodes[1].node.get_and_clear_pending_msg_events();
390 assert_eq!(events.len(), 1);
391 let ev = remove_first_msg_event_to_node(&nodes[2].node.get_our_node_id(), &mut events);
392 let mut payment_event = SendEvent::from_event(ev);
394 // Ensure the final node fails to handle the HTLC.
395 payment_event.msgs[0].onion_routing_packet.hop_data[0] ^= 1;
396 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event.msgs[0]);
397 check_added_monitors!(nodes[2], 0);
398 do_commitment_signed_dance(&nodes[2], &nodes[1], &payment_event.commitment_msg, true, true);
399 nodes[2].node.process_pending_htlc_forwards();
401 let mut updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
402 let mut update_malformed = &mut updates.update_fail_malformed_htlcs[0];
403 // Check that the final node encodes its failure correctly.
404 assert_eq!(update_malformed.failure_code, INVALID_ONION_BLINDING);
405 assert_eq!(update_malformed.sha256_of_onion, [0; 32]);
407 // Modify such the final hop does not correctly blind their error so we can ensure the intro node
408 // converts it to the correct error.
409 update_malformed.sha256_of_onion = [1; 32];
410 nodes[1].node.handle_update_fail_malformed_htlc(&nodes[2].node.get_our_node_id(), update_malformed);
411 do_commitment_signed_dance(&nodes[1], &nodes[2], &updates.commitment_signed, true, false);
413 let mut updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
414 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
415 do_commitment_signed_dance(&nodes[0], &nodes[1], &updates.commitment_signed, false, false);
416 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
417 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
420 enum ProcessPendingHTLCsCheck {
426 fn forward_fail_in_process_pending_htlc_fwds() {
427 do_forward_fail_in_process_pending_htlc_fwds(ProcessPendingHTLCsCheck::FwdPeerDisconnected);
428 do_forward_fail_in_process_pending_htlc_fwds(ProcessPendingHTLCsCheck::FwdChannelClosed);
430 fn do_forward_fail_in_process_pending_htlc_fwds(check: ProcessPendingHTLCsCheck) {
431 // Ensure the intro node will error backwards properly if the HTLC fails in
432 // process_pending_htlc_forwards.
433 let chanmon_cfgs = create_chanmon_cfgs(3);
434 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
435 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
436 let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
437 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
438 let (chan_upd_1_2, channel_id) = {
439 let chan = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0);
440 (chan.0.contents, chan.2)
444 let (_, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[2], Some(amt_msat), None);
445 let route_params = get_blinded_route_parameters(amt_msat, payment_secret,
446 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(), &[&chan_upd_1_2],
447 &chanmon_cfgs[2].keys_manager);
449 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
450 check_added_monitors(&nodes[0], 1);
452 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
453 assert_eq!(events.len(), 1);
454 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
455 let mut payment_event = SendEvent::from_event(ev);
457 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
458 check_added_monitors!(nodes[1], 0);
459 do_commitment_signed_dance(&nodes[1], &nodes[0], &payment_event.commitment_msg, false, false);
462 ProcessPendingHTLCsCheck::FwdPeerDisconnected => {
463 // Disconnect the next-hop peer so when we go to forward in process_pending_htlc_forwards, the
464 // intro node will error backwards.
465 nodes[1].node.peer_disconnected(&nodes[2].node.get_our_node_id());
466 expect_pending_htlcs_forwardable!(nodes[1]);
467 expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore!(nodes[1],
468 vec![HTLCDestination::NextHopChannel { node_id: Some(nodes[2].node.get_our_node_id()), channel_id }]);
470 ProcessPendingHTLCsCheck::FwdChannelClosed => {
471 // Force close the next-hop channel so when we go to forward in process_pending_htlc_forwards,
472 // the intro node will error backwards.
473 nodes[1].node.force_close_broadcasting_latest_txn(&channel_id, &nodes[2].node.get_our_node_id()).unwrap();
474 let events = nodes[1].node.get_and_clear_pending_events();
476 crate::events::Event::PendingHTLCsForwardable { .. } => {},
477 _ => panic!("Unexpected event {:?}", events),
480 crate::events::Event::ChannelClosed { .. } => {},
481 _ => panic!("Unexpected event {:?}", events),
484 nodes[1].node.process_pending_htlc_forwards();
485 expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore!(nodes[1],
486 vec![HTLCDestination::UnknownNextHop { requested_forward_scid: chan_upd_1_2.short_channel_id }]);
487 check_closed_broadcast(&nodes[1], 1, true);
488 check_added_monitors!(nodes[1], 1);
489 nodes[1].node.process_pending_htlc_forwards();
493 let mut updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
494 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
495 check_added_monitors!(nodes[1], 1);
496 do_commitment_signed_dance(&nodes[0], &nodes[1], &updates.commitment_signed, false, false);
498 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
499 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
503 fn blinded_intercept_payment() {
504 do_blinded_intercept_payment(true);
505 do_blinded_intercept_payment(false);
507 fn do_blinded_intercept_payment(intercept_node_fails: bool) {
508 let chanmon_cfgs = create_chanmon_cfgs(3);
509 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
510 let mut intercept_forwards_config = test_default_channel_config();
511 intercept_forwards_config.accept_intercept_htlcs = true;
512 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, Some(intercept_forwards_config), None]);
513 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
514 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
515 let (channel_id, chan_upd) = {
516 let chan = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0);
517 (chan.2, chan.0.contents)
521 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[2], Some(amt_msat), None);
522 let intercept_scid = nodes[1].node.get_intercept_scid();
523 let mut intercept_chan_upd = chan_upd;
524 intercept_chan_upd.short_channel_id = intercept_scid;
525 let route_params = get_blinded_route_parameters(amt_msat, payment_secret,
526 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(), &[&intercept_chan_upd],
527 &chanmon_cfgs[2].keys_manager);
529 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(),
530 PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
531 check_added_monitors(&nodes[0], 1);
532 let payment_event = {
533 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
534 assert_eq!(events.len(), 1);
535 SendEvent::from_event(events.remove(0))
537 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
538 commitment_signed_dance!(nodes[1], nodes[0], &payment_event.commitment_msg, false, true);
540 let events = nodes[1].node.get_and_clear_pending_events();
541 assert_eq!(events.len(), 1);
542 let (intercept_id, expected_outbound_amount_msat) = match events[0] {
543 crate::events::Event::HTLCIntercepted {
544 intercept_id, payment_hash: pmt_hash,
545 requested_next_hop_scid: short_channel_id, expected_outbound_amount_msat, ..
547 assert_eq!(pmt_hash, payment_hash);
548 assert_eq!(short_channel_id, intercept_scid);
549 (intercept_id, expected_outbound_amount_msat)
554 if intercept_node_fails {
555 nodes[1].node.fail_intercepted_htlc(intercept_id).unwrap();
556 expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore!(nodes[1], vec![HTLCDestination::UnknownNextHop { requested_forward_scid: intercept_scid }]);
557 nodes[1].node.process_pending_htlc_forwards();
558 let update_fail = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
559 check_added_monitors!(&nodes[1], 1);
560 assert!(update_fail.update_fail_htlcs.len() == 1);
561 let fail_msg = update_fail.update_fail_htlcs[0].clone();
562 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &fail_msg);
563 commitment_signed_dance!(nodes[0], nodes[1], update_fail.commitment_signed, false);
564 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
565 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
569 nodes[1].node.forward_intercepted_htlc(intercept_id, &channel_id, nodes[2].node.get_our_node_id(), expected_outbound_amount_msat).unwrap();
570 expect_pending_htlcs_forwardable!(nodes[1]);
572 let payment_event = {
574 let mut added_monitors = nodes[1].chain_monitor.added_monitors.lock().unwrap();
575 assert_eq!(added_monitors.len(), 1);
576 added_monitors.clear();
578 let mut events = nodes[1].node.get_and_clear_pending_msg_events();
579 assert_eq!(events.len(), 1);
580 SendEvent::from_event(events.remove(0))
582 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event.msgs[0]);
583 commitment_signed_dance!(nodes[2], nodes[1], &payment_event.commitment_msg, false, true);
584 expect_pending_htlcs_forwardable!(nodes[2]);
586 expect_payment_claimable!(&nodes[2], payment_hash, payment_secret, amt_msat, None, nodes[2].node.get_our_node_id());
587 do_claim_payment_along_route(&nodes[0], &vec!(&vec!(&nodes[1], &nodes[2])[..]), false, payment_preimage);
588 expect_payment_sent(&nodes[0], payment_preimage, Some(Some(1000)), true, true);
592 fn two_hop_blinded_path_success() {
593 let chanmon_cfgs = create_chanmon_cfgs(3);
594 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
595 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
596 let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
597 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
598 let chan_upd_1_2 = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0).0.contents;
601 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[2], Some(amt_msat), None);
602 let route_params = get_blinded_route_parameters(amt_msat, payment_secret,
603 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(), &[&chan_upd_1_2],
604 &chanmon_cfgs[2].keys_manager);
606 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
607 check_added_monitors(&nodes[0], 1);
608 pass_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], amt_msat, payment_hash, payment_secret);
609 claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage);
613 fn three_hop_blinded_path_success() {
614 let chanmon_cfgs = create_chanmon_cfgs(5);
615 let node_cfgs = create_node_cfgs(5, &chanmon_cfgs);
616 let node_chanmgrs = create_node_chanmgrs(5, &node_cfgs, &[None, None, None, None, None]);
617 let mut nodes = create_network(5, &node_cfgs, &node_chanmgrs);
618 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
619 create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0);
620 let chan_upd_2_3 = create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 1_000_000, 0).0.contents;
621 let chan_upd_3_4 = create_announced_chan_between_nodes_with_value(&nodes, 3, 4, 1_000_000, 0).0.contents;
623 // Get all our nodes onto the same height so payments don't fail for CLTV violations.
624 connect_blocks(&nodes[0], nodes[4].best_block_info().1 - nodes[0].best_block_info().1);
625 connect_blocks(&nodes[1], nodes[4].best_block_info().1 - nodes[1].best_block_info().1);
626 connect_blocks(&nodes[2], nodes[4].best_block_info().1 - nodes[2].best_block_info().1);
627 assert_eq!(nodes[4].best_block_info().1, nodes[3].best_block_info().1);
630 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[4], Some(amt_msat), None);
631 let route_params = get_blinded_route_parameters(amt_msat, payment_secret,
632 nodes.iter().skip(2).map(|n| n.node.get_our_node_id()).collect(),
633 &[&chan_upd_2_3, &chan_upd_3_4], &chanmon_cfgs[4].keys_manager);
635 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
636 check_added_monitors(&nodes[0], 1);
637 pass_along_route(&nodes[0], &[&[&nodes[1], &nodes[2], &nodes[3], &nodes[4]]], amt_msat, payment_hash, payment_secret);
638 claim_payment(&nodes[0], &[&nodes[1], &nodes[2], &nodes[3], &nodes[4]], payment_preimage);
642 enum ReceiveCheckFail {
643 // The recipient fails the payment upon `PaymentClaimable`.
645 // Failure to decode the recipient's onion payload.
647 // The incoming HTLC did not satisfy our requirements; in this case it underpaid us according to
648 // the expected receive amount in the onion.
650 // The incoming HTLC errors when added to the Channel, in this case due to the HTLC being
651 // delivered out-of-order with a shutdown message.
653 // The HTLC is successfully added to the inbound channel but fails receive checks in
654 // process_pending_htlc_forwards.
655 ProcessPendingHTLCsCheck,
656 // The HTLC violates the `PaymentConstraints` contained within the receiver's encrypted payload.
661 fn multi_hop_receiver_fail() {
662 do_multi_hop_receiver_fail(ReceiveCheckFail::RecipientFail);
663 do_multi_hop_receiver_fail(ReceiveCheckFail::OnionDecodeFail);
664 do_multi_hop_receiver_fail(ReceiveCheckFail::ReceiveRequirements);
665 do_multi_hop_receiver_fail(ReceiveCheckFail::ChannelCheck);
666 do_multi_hop_receiver_fail(ReceiveCheckFail::ProcessPendingHTLCsCheck);
667 do_multi_hop_receiver_fail(ReceiveCheckFail::PaymentConstraints);
670 fn do_multi_hop_receiver_fail(check: ReceiveCheckFail) {
671 // Test that the receiver to a multihop blinded path fails back correctly.
672 let chanmon_cfgs = create_chanmon_cfgs(3);
673 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
674 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
675 let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
676 // We need the session priv to construct an invalid onion packet later.
677 let session_priv = [3; 32];
678 *nodes[0].keys_manager.override_random_bytes.lock().unwrap() = Some(session_priv);
679 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
680 let (chan_upd_1_2, chan_id_1_2) = {
681 let (chan_upd, _, channel_id, ..) = create_announced_chan_between_nodes_with_value(
682 &nodes, 1, 2, 1_000_000, 0
684 (chan_upd.contents, channel_id)
688 let excess_final_cltv_delta_opt = if check == ReceiveCheckFail::ProcessPendingHTLCsCheck {
689 // Set the final CLTV expiry too low to trigger the failure in process_pending_htlc_forwards.
690 Some(TEST_FINAL_CLTV as u16 - 2)
692 let (_, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[2], Some(amt_msat), excess_final_cltv_delta_opt);
693 let mut route_params = get_blinded_route_parameters(amt_msat, payment_secret,
694 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(), &[&chan_upd_1_2],
695 &chanmon_cfgs[2].keys_manager);
697 let route = if check == ReceiveCheckFail::ProcessPendingHTLCsCheck {
698 let mut route = get_route(&nodes[0], &route_params).unwrap();
699 // Set the final CLTV expiry too low to trigger the failure in process_pending_htlc_forwards.
700 route.paths[0].hops.last_mut().map(|h| h.cltv_expiry_delta += excess_final_cltv_delta_opt.unwrap() as u32);
701 route.paths[0].blinded_tail.as_mut().map(|bt| bt.excess_final_cltv_expiry_delta = excess_final_cltv_delta_opt.unwrap() as u32);
703 } else if check == ReceiveCheckFail::PaymentConstraints {
704 // Create a blinded path where the receiver's encrypted payload has an htlc_minimum_msat that is
705 // violated by `amt_msat`, and stick it in the route_params without changing the corresponding
706 // BlindedPayInfo (to ensure pathfinding still succeeds).
707 let high_htlc_min_bp = {
708 let mut high_htlc_minimum_upd = chan_upd_1_2.clone();
709 high_htlc_minimum_upd.htlc_minimum_msat = amt_msat + 1000;
710 let high_htlc_min_params = get_blinded_route_parameters(amt_msat, payment_secret,
711 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(), &[&high_htlc_minimum_upd],
712 &chanmon_cfgs[2].keys_manager);
713 if let Payee::Blinded { route_hints, .. } = high_htlc_min_params.payment_params.payee {
714 route_hints[0].1.clone()
717 if let Payee::Blinded { ref mut route_hints, .. } = route_params.payment_params.payee {
718 route_hints[0].1 = high_htlc_min_bp;
720 find_route(&nodes[0], &route_params).unwrap()
722 find_route(&nodes[0], &route_params).unwrap()
724 node_cfgs[0].router.expect_find_route(route_params.clone(), Ok(route.clone()));
725 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
726 check_added_monitors(&nodes[0], 1);
728 let mut payment_event_0_1 = {
729 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
730 assert_eq!(events.len(), 1);
731 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
732 SendEvent::from_event(ev)
734 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event_0_1.msgs[0]);
735 check_added_monitors!(nodes[1], 0);
736 do_commitment_signed_dance(&nodes[1], &nodes[0], &payment_event_0_1.commitment_msg, false, false);
737 expect_pending_htlcs_forwardable!(nodes[1]);
738 check_added_monitors!(&nodes[1], 1);
740 let mut payment_event_1_2 = {
741 let mut events = nodes[1].node.get_and_clear_pending_msg_events();
742 assert_eq!(events.len(), 1);
743 let ev = remove_first_msg_event_to_node(&nodes[2].node.get_our_node_id(), &mut events);
744 SendEvent::from_event(ev)
748 ReceiveCheckFail::RecipientFail => {
749 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event_1_2.msgs[0]);
750 check_added_monitors!(nodes[2], 0);
751 do_commitment_signed_dance(&nodes[2], &nodes[1], &payment_event_1_2.commitment_msg, true, true);
752 expect_pending_htlcs_forwardable!(nodes[2]);
753 check_payment_claimable(
754 &nodes[2].node.get_and_clear_pending_events()[0], payment_hash, payment_secret, amt_msat,
755 None, nodes[2].node.get_our_node_id()
757 nodes[2].node.fail_htlc_backwards(&payment_hash);
758 expect_pending_htlcs_forwardable_conditions(
759 nodes[2].node.get_and_clear_pending_events(), &[HTLCDestination::FailedPayment { payment_hash }]
761 nodes[2].node.process_pending_htlc_forwards();
762 check_added_monitors!(nodes[2], 1);
764 ReceiveCheckFail::OnionDecodeFail => {
765 let session_priv = SecretKey::from_slice(&session_priv).unwrap();
766 let mut onion_keys = onion_utils::construct_onion_keys(&Secp256k1::new(), &route.paths[0], &session_priv).unwrap();
767 let cur_height = nodes[0].best_block_info().1;
768 let (mut onion_payloads, ..) = onion_utils::build_onion_payloads(
769 &route.paths[0], amt_msat, RecipientOnionFields::spontaneous_empty(), cur_height, &None).unwrap();
771 let update_add = &mut payment_event_1_2.msgs[0];
772 onion_payloads.last_mut().map(|p| {
773 if let msgs::OutboundOnionPayload::BlindedReceive { ref mut intro_node_blinding_point, .. } = p {
774 // The receiver should error if both the update_add blinding_point and the
775 // intro_node_blinding_point are set.
776 assert!(intro_node_blinding_point.is_none() && update_add.blinding_point.is_some());
777 *intro_node_blinding_point = Some(PublicKey::from_slice(&[2; 33]).unwrap());
780 update_add.onion_routing_packet = onion_utils::construct_onion_packet(
781 vec![onion_payloads.pop().unwrap()], vec![onion_keys.pop().unwrap()], [0; 32],
784 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), update_add);
785 check_added_monitors!(nodes[2], 0);
786 do_commitment_signed_dance(&nodes[2], &nodes[1], &payment_event_1_2.commitment_msg, true, true);
788 ReceiveCheckFail::ReceiveRequirements => {
789 let update_add = &mut payment_event_1_2.msgs[0];
790 update_add.amount_msat -= 1;
791 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), update_add);
792 check_added_monitors!(nodes[2], 0);
793 do_commitment_signed_dance(&nodes[2], &nodes[1], &payment_event_1_2.commitment_msg, true, true);
795 ReceiveCheckFail::ChannelCheck => {
796 nodes[2].node.close_channel(&chan_id_1_2, &nodes[1].node.get_our_node_id()).unwrap();
797 let node_2_shutdown = get_event_msg!(nodes[2], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
798 nodes[1].node.handle_shutdown(&nodes[2].node.get_our_node_id(), &node_2_shutdown);
799 let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[2].node.get_our_node_id());
801 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event_1_2.msgs[0]);
802 nodes[2].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &payment_event_1_2.commitment_msg);
803 check_added_monitors!(nodes[2], 1);
805 nodes[2].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
806 commitment_signed_dance!(nodes[2], nodes[1], (), false, true, false, false);
808 ReceiveCheckFail::ProcessPendingHTLCsCheck => {
809 assert_eq!(payment_event_1_2.msgs[0].cltv_expiry, nodes[0].best_block_info().1 + 1 + excess_final_cltv_delta_opt.unwrap() as u32 + TEST_FINAL_CLTV);
810 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event_1_2.msgs[0]);
811 check_added_monitors!(nodes[2], 0);
812 do_commitment_signed_dance(&nodes[2], &nodes[1], &payment_event_1_2.commitment_msg, true, true);
813 expect_pending_htlcs_forwardable!(nodes[2]);
814 expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore!(nodes[2],
815 vec![HTLCDestination::FailedPayment { payment_hash }]);
816 check_added_monitors!(nodes[2], 1);
818 ReceiveCheckFail::PaymentConstraints => {
819 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event_1_2.msgs[0]);
820 check_added_monitors!(nodes[2], 0);
821 do_commitment_signed_dance(&nodes[2], &nodes[1], &payment_event_1_2.commitment_msg, true, true);
825 let updates_2_1 = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
826 assert_eq!(updates_2_1.update_fail_malformed_htlcs.len(), 1);
827 let update_malformed = &updates_2_1.update_fail_malformed_htlcs[0];
828 assert_eq!(update_malformed.sha256_of_onion, [0; 32]);
829 assert_eq!(update_malformed.failure_code, INVALID_ONION_BLINDING);
830 nodes[1].node.handle_update_fail_malformed_htlc(&nodes[2].node.get_our_node_id(), update_malformed);
831 do_commitment_signed_dance(&nodes[1], &nodes[2], &updates_2_1.commitment_signed, true, false);
833 let updates_1_0 = if check == ReceiveCheckFail::ChannelCheck {
834 let events = nodes[1].node.get_and_clear_pending_msg_events();
835 assert_eq!(events.len(), 2);
836 events.into_iter().find_map(|ev| {
838 MessageSendEvent:: UpdateHTLCs { node_id, updates } => {
839 assert_eq!(node_id, nodes[0].node.get_our_node_id());
842 MessageSendEvent::SendClosingSigned { .. } => None,
846 } else { get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id()) };
847 assert_eq!(updates_1_0.update_fail_htlcs.len(), 1);
848 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates_1_0.update_fail_htlcs[0]);
849 do_commitment_signed_dance(&nodes[0], &nodes[1], &updates_1_0.commitment_signed, false, false);
850 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
851 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
855 fn blinded_path_retries() {
856 let chanmon_cfgs = create_chanmon_cfgs(4);
857 // Make one blinded path's fees slightly higher so they are tried in a deterministic order.
858 let mut higher_fee_chan_cfg = test_default_channel_config();
859 higher_fee_chan_cfg.channel_config.forwarding_fee_base_msat += 1;
860 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
861 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, Some(higher_fee_chan_cfg), None]);
862 let mut nodes = create_network(4, &node_cfgs, &node_chanmgrs);
864 // Create this network topology so nodes[0] has a blinded route hint to retry over.
870 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
871 create_announced_chan_between_nodes_with_value(&nodes, 0, 2, 1_000_000, 0);
872 let chan_1_3 = create_announced_chan_between_nodes_with_value(&nodes, 1, 3, 1_000_000, 0);
873 let chan_2_3 = create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 1_000_000, 0);
876 let (_, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[3], Some(amt_msat), None);
878 let pay_params = PaymentParameters::blinded(
880 blinded_payment_path(payment_secret,
881 vec![nodes[1].node.get_our_node_id(), nodes[3].node.get_our_node_id()], &[&chan_1_3.0.contents],
882 &chanmon_cfgs[3].keys_manager
884 blinded_payment_path(payment_secret,
885 vec![nodes[2].node.get_our_node_id(), nodes[3].node.get_our_node_id()], &[&chan_2_3.0.contents],
886 &chanmon_cfgs[3].keys_manager
890 .with_bolt12_features(channelmanager::provided_bolt12_invoice_features(&UserConfig::default()))
892 RouteParameters::from_payment_params_and_value(pay_params, amt_msat)
895 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params.clone(), Retry::Attempts(2)).unwrap();
896 check_added_monitors(&nodes[0], 1);
897 pass_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]]], amt_msat, payment_hash, payment_secret);
899 macro_rules! fail_payment_back {
900 ($intro_node: expr) => {
901 nodes[3].node.fail_htlc_backwards(&payment_hash);
902 expect_pending_htlcs_forwardable_conditions(
903 nodes[3].node.get_and_clear_pending_events(), &[HTLCDestination::FailedPayment { payment_hash }]
905 nodes[3].node.process_pending_htlc_forwards();
906 check_added_monitors!(nodes[3], 1);
908 let updates = get_htlc_update_msgs!(nodes[3], $intro_node.node.get_our_node_id());
909 assert_eq!(updates.update_fail_malformed_htlcs.len(), 1);
910 let update_malformed = &updates.update_fail_malformed_htlcs[0];
911 assert_eq!(update_malformed.sha256_of_onion, [0; 32]);
912 assert_eq!(update_malformed.failure_code, INVALID_ONION_BLINDING);
913 $intro_node.node.handle_update_fail_malformed_htlc(&nodes[3].node.get_our_node_id(), update_malformed);
914 do_commitment_signed_dance(&$intro_node, &nodes[3], &updates.commitment_signed, true, false);
916 let updates = get_htlc_update_msgs!($intro_node, nodes[0].node.get_our_node_id());
917 assert_eq!(updates.update_fail_htlcs.len(), 1);
918 nodes[0].node.handle_update_fail_htlc(&$intro_node.node.get_our_node_id(), &updates.update_fail_htlcs[0]);
919 do_commitment_signed_dance(&nodes[0], &$intro_node, &updates.commitment_signed, false, false);
921 let mut events = nodes[0].node.get_and_clear_pending_events();
922 assert_eq!(events.len(), 2);
924 Event::PaymentPathFailed { payment_hash: ev_payment_hash, payment_failed_permanently, .. } => {
925 assert_eq!(payment_hash, ev_payment_hash);
926 assert_eq!(payment_failed_permanently, false);
928 _ => panic!("Unexpected event"),
931 Event::PendingHTLCsForwardable { .. } => {},
932 _ => panic!("Unexpected event"),
934 nodes[0].node.process_pending_htlc_forwards();
938 fail_payment_back!(nodes[1]);
940 // Pass the retry along.
941 check_added_monitors!(nodes[0], 1);
942 let mut msg_events = nodes[0].node.get_and_clear_pending_msg_events();
943 assert_eq!(msg_events.len(), 1);
944 pass_along_path(&nodes[0], &[&nodes[2], &nodes[3]], amt_msat, payment_hash, Some(payment_secret), msg_events.pop().unwrap(), true, None);
946 fail_payment_back!(nodes[2]);
947 let evs = nodes[0].node.get_and_clear_pending_events();
948 assert_eq!(evs.len(), 1);
950 Event::PaymentFailed { payment_hash: ev_payment_hash, reason, .. } => {
951 assert_eq!(ev_payment_hash, payment_hash);
952 // We have 1 retry attempt remaining, but we're out of blinded paths to try.
953 assert_eq!(reason, Some(PaymentFailureReason::RouteNotFound));