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, PaymentContext, PaymentRelay, ReceiveTlvs};
13 use crate::events::{Event, HTLCDestination, MessageSendEvent, MessageSendEventsProvider, PaymentFailureReason};
14 use crate::ln::types::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, IDEMPOTENCY_TIMEOUT_TICKS};
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, intro_node_min_htlc: u64, intro_node_max_htlc: u64,
32 node_ids: Vec<PublicKey>, channel_upds: &[&msgs::UnsignedChannelUpdate],
33 keys_manager: &test_utils::TestKeysInterface
34 ) -> (BlindedPayInfo, BlindedPath) {
35 let mut intermediate_nodes = Vec::new();
36 let mut intro_node_min_htlc_opt = Some(intro_node_min_htlc);
37 let mut intro_node_max_htlc_opt = Some(intro_node_max_htlc);
38 for (idx, (node_id, chan_upd)) in node_ids.iter().zip(channel_upds).enumerate() {
39 intermediate_nodes.push(ForwardNode {
42 short_channel_id: chan_upd.short_channel_id,
43 payment_relay: PaymentRelay {
44 cltv_expiry_delta: chan_upd.cltv_expiry_delta,
45 fee_proportional_millionths: chan_upd.fee_proportional_millionths,
46 fee_base_msat: chan_upd.fee_base_msat,
48 payment_constraints: PaymentConstraints {
49 max_cltv_expiry: u32::max_value(),
50 htlc_minimum_msat: intro_node_min_htlc_opt.take()
51 .unwrap_or_else(|| channel_upds[idx - 1].htlc_minimum_msat),
53 features: BlindedHopFeatures::empty(),
55 htlc_maximum_msat: intro_node_max_htlc_opt.take()
56 .unwrap_or_else(|| channel_upds[idx - 1].htlc_maximum_msat),
59 let payee_tlvs = ReceiveTlvs {
61 payment_constraints: PaymentConstraints {
62 max_cltv_expiry: u32::max_value(),
64 intro_node_min_htlc_opt.unwrap_or_else(|| channel_upds.last().unwrap().htlc_minimum_msat),
66 payment_context: PaymentContext::unknown(),
68 let mut secp_ctx = Secp256k1::new();
69 BlindedPath::new_for_payment(
70 &intermediate_nodes[..], *node_ids.last().unwrap(), payee_tlvs,
71 intro_node_max_htlc_opt.unwrap_or_else(|| channel_upds.last().unwrap().htlc_maximum_msat),
72 TEST_FINAL_CLTV as u16, keys_manager, &secp_ctx
76 pub fn get_blinded_route_parameters(
77 amt_msat: u64, payment_secret: PaymentSecret, intro_node_min_htlc: u64, intro_node_max_htlc: u64,
78 node_ids: Vec<PublicKey>, channel_upds: &[&msgs::UnsignedChannelUpdate],
79 keys_manager: &test_utils::TestKeysInterface
80 ) -> RouteParameters {
81 RouteParameters::from_payment_params_and_value(
82 PaymentParameters::blinded(vec![
84 payment_secret, intro_node_min_htlc, intro_node_max_htlc, node_ids, channel_upds,
92 fn one_hop_blinded_path() {
93 do_one_hop_blinded_path(true);
94 do_one_hop_blinded_path(false);
97 fn do_one_hop_blinded_path(success: bool) {
98 let chanmon_cfgs = create_chanmon_cfgs(2);
99 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
100 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
101 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
102 let chan_upd = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0).0.contents;
105 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[1], Some(amt_msat), None);
106 let payee_tlvs = ReceiveTlvs {
108 payment_constraints: PaymentConstraints {
109 max_cltv_expiry: u32::max_value(),
110 htlc_minimum_msat: chan_upd.htlc_minimum_msat,
112 payment_context: PaymentContext::unknown(),
114 let mut secp_ctx = Secp256k1::new();
115 let blinded_path = BlindedPath::one_hop_for_payment(
116 nodes[1].node.get_our_node_id(), payee_tlvs, TEST_FINAL_CLTV as u16,
117 &chanmon_cfgs[1].keys_manager, &secp_ctx
120 let route_params = RouteParameters::from_payment_params_and_value(
121 PaymentParameters::blinded(vec![blinded_path]),
124 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(),
125 PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
126 check_added_monitors(&nodes[0], 1);
127 pass_along_route(&nodes[0], &[&[&nodes[1]]], amt_msat, payment_hash, payment_secret);
129 claim_payment(&nodes[0], &[&nodes[1]], payment_preimage);
131 fail_payment(&nodes[0], &[&nodes[1]], payment_hash);
136 fn mpp_to_one_hop_blinded_path() {
137 let chanmon_cfgs = create_chanmon_cfgs(4);
138 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
139 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
140 let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
141 let mut secp_ctx = Secp256k1::new();
143 create_announced_chan_between_nodes(&nodes, 0, 1);
144 create_announced_chan_between_nodes(&nodes, 0, 2);
145 let chan_upd_1_3 = create_announced_chan_between_nodes(&nodes, 1, 3).0.contents;
146 create_announced_chan_between_nodes(&nodes, 2, 3).0.contents;
148 let amt_msat = 15_000_000;
149 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[3], Some(amt_msat), None);
150 let payee_tlvs = ReceiveTlvs {
152 payment_constraints: PaymentConstraints {
153 max_cltv_expiry: u32::max_value(),
154 htlc_minimum_msat: chan_upd_1_3.htlc_minimum_msat,
156 payment_context: PaymentContext::unknown(),
158 let blinded_path = BlindedPath::one_hop_for_payment(
159 nodes[3].node.get_our_node_id(), payee_tlvs, TEST_FINAL_CLTV as u16,
160 &chanmon_cfgs[3].keys_manager, &secp_ctx
163 let bolt12_features =
164 channelmanager::provided_bolt12_invoice_features(&UserConfig::default());
165 let route_params = RouteParameters::from_payment_params_and_value(
166 PaymentParameters::blinded(vec![blinded_path]).with_bolt12_features(bolt12_features).unwrap(),
169 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
170 check_added_monitors(&nodes[0], 2);
172 let expected_route: &[&[&Node]] = &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]];
173 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
174 assert_eq!(events.len(), 2);
176 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
177 pass_along_path(&nodes[0], expected_route[0], amt_msat, payment_hash.clone(),
178 Some(payment_secret), ev.clone(), false, None);
180 let ev = remove_first_msg_event_to_node(&nodes[2].node.get_our_node_id(), &mut events);
181 pass_along_path(&nodes[0], expected_route[1], amt_msat, payment_hash.clone(),
182 Some(payment_secret), ev.clone(), true, None);
183 claim_payment_along_route(&nodes[0], expected_route, false, payment_preimage);
187 fn mpp_to_three_hop_blinded_paths() {
188 let chanmon_cfgs = create_chanmon_cfgs(6);
189 let node_cfgs = create_node_cfgs(6, &chanmon_cfgs);
190 let node_chanmgrs = create_node_chanmgrs(6, &node_cfgs, &[None, None, None, None, None, None]);
191 let nodes = create_network(6, &node_cfgs, &node_chanmgrs);
193 // Create this network topology so node 0 MPP's over 2 3-hop blinded paths:
199 create_announced_chan_between_nodes(&nodes, 0, 1);
200 create_announced_chan_between_nodes(&nodes, 0, 2);
201 let chan_upd_1_3 = create_announced_chan_between_nodes(&nodes, 1, 3).0.contents;
202 let chan_upd_2_4 = create_announced_chan_between_nodes(&nodes, 2, 4).0.contents;
203 let chan_upd_3_5 = create_announced_chan_between_nodes(&nodes, 3, 5).0.contents;
204 let chan_upd_4_5 = create_announced_chan_between_nodes(&nodes, 4, 5).0.contents;
206 let amt_msat = 15_000_000;
207 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[5], Some(amt_msat), None);
209 let path_1_params = get_blinded_route_parameters(
210 amt_msat, payment_secret, 1, 1_0000_0000, vec![
211 nodes[1].node.get_our_node_id(), nodes[3].node.get_our_node_id(),
212 nodes[5].node.get_our_node_id()
213 ], &[&chan_upd_1_3, &chan_upd_3_5], &chanmon_cfgs[5].keys_manager
215 let path_2_params = get_blinded_route_parameters(
216 amt_msat, payment_secret, 1, 1_0000_0000, vec![
217 nodes[2].node.get_our_node_id(), nodes[4].node.get_our_node_id(),
218 nodes[5].node.get_our_node_id()
219 ], &[&chan_upd_2_4, &chan_upd_4_5], &chanmon_cfgs[5].keys_manager
221 let pay_params = PaymentParameters::blinded(
223 path_1_params.payment_params.payee.blinded_route_hints()[0].clone(),
224 path_2_params.payment_params.payee.blinded_route_hints()[0].clone()
227 .with_bolt12_features(channelmanager::provided_bolt12_invoice_features(&UserConfig::default()))
229 RouteParameters::from_payment_params_and_value(pay_params, amt_msat)
232 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(),
233 PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
234 check_added_monitors(&nodes[0], 2);
236 let expected_route: &[&[&Node]] = &[&[&nodes[1], &nodes[3], &nodes[5]], &[&nodes[2], &nodes[4], &nodes[5]]];
237 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
238 assert_eq!(events.len(), 2);
240 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
241 pass_along_path(&nodes[0], expected_route[0], amt_msat, payment_hash.clone(),
242 Some(payment_secret), ev.clone(), false, None);
244 let ev = remove_first_msg_event_to_node(&nodes[2].node.get_our_node_id(), &mut events);
245 pass_along_path(&nodes[0], expected_route[1], amt_msat, payment_hash.clone(),
246 Some(payment_secret), ev.clone(), true, None);
247 claim_payment_along_route(&nodes[0], expected_route, false, payment_preimage);
250 enum ForwardCheckFail {
251 // Fail a check on the inbound onion payload. In this case, we underflow when calculating the
252 // outgoing cltv_expiry.
254 // The forwarding node's payload is encoded as a receive, i.e. the next hop HMAC is [0; 32].
255 ForwardPayloadEncodedAsReceive,
256 // Fail a check on the outbound channel. In this case, our next-hop peer is offline.
257 OutboundChannelCheck,
261 fn forward_checks_failure() {
262 do_forward_checks_failure(ForwardCheckFail::InboundOnionCheck, true);
263 do_forward_checks_failure(ForwardCheckFail::InboundOnionCheck, false);
264 do_forward_checks_failure(ForwardCheckFail::ForwardPayloadEncodedAsReceive, true);
265 do_forward_checks_failure(ForwardCheckFail::ForwardPayloadEncodedAsReceive, false);
266 do_forward_checks_failure(ForwardCheckFail::OutboundChannelCheck, true);
267 do_forward_checks_failure(ForwardCheckFail::OutboundChannelCheck, false);
270 fn do_forward_checks_failure(check: ForwardCheckFail, intro_fails: bool) {
271 // Ensure we'll fail backwards properly if a forwarding check fails on initial update_add
273 let chanmon_cfgs = create_chanmon_cfgs(4);
274 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
275 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
276 let mut nodes = create_network(4, &node_cfgs, &node_chanmgrs);
277 // We need the session priv to construct a bogus onion packet later.
278 *nodes[0].keys_manager.override_random_bytes.lock().unwrap() = Some([3; 32]);
279 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
280 let chan_upd_1_2 = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0).0.contents;
281 let chan_upd_2_3 = create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 1_000_000, 0).0.contents;
284 let (_, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[3], Some(amt_msat), None);
285 let mut route_params = get_blinded_route_parameters(amt_msat, payment_secret, 1, 1_0000_0000,
286 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(),
287 &[&chan_upd_1_2, &chan_upd_2_3], &chanmon_cfgs[3].keys_manager);
288 route_params.payment_params.max_path_length = 18;
290 let route = get_route(&nodes[0], &route_params).unwrap();
291 node_cfgs[0].router.expect_find_route(route_params.clone(), Ok(route.clone()));
292 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
293 check_added_monitors(&nodes[0], 1);
295 macro_rules! cause_error {
296 ($src_node_idx: expr, $target_node_idx: expr, $update_add: expr) => {
298 ForwardCheckFail::InboundOnionCheck => {
299 $update_add.cltv_expiry = 10; // causes outbound CLTV expiry to underflow
301 ForwardCheckFail::ForwardPayloadEncodedAsReceive => {
302 let recipient_onion_fields = RecipientOnionFields::spontaneous_empty();
303 let session_priv = SecretKey::from_slice(&[3; 32]).unwrap();
304 let onion_keys = onion_utils::construct_onion_keys(&Secp256k1::new(), &route.paths[0], &session_priv).unwrap();
305 let cur_height = nodes[0].best_block_info().1;
306 let (mut onion_payloads, ..) = onion_utils::build_onion_payloads(
307 &route.paths[0], amt_msat, &recipient_onion_fields, cur_height, &None).unwrap();
308 // Remove the receive payload so the blinded forward payload is encoded as a final payload
309 // (i.e. next_hop_hmac == [0; 32])
310 onion_payloads.pop();
311 if $target_node_idx + 1 < nodes.len() {
312 onion_payloads.pop();
314 $update_add.onion_routing_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, [0; 32], &payment_hash).unwrap();
316 ForwardCheckFail::OutboundChannelCheck => {
317 // The intro node will see that the next-hop peer is disconnected and fail the HTLC backwards.
318 nodes[$src_node_idx].node.peer_disconnected(&nodes[$target_node_idx].node.get_our_node_id());
324 let mut updates_0_1 = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
325 let update_add = &mut updates_0_1.update_add_htlcs[0];
328 cause_error!(1, 2, update_add);
331 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &update_add);
332 check_added_monitors!(nodes[1], 0);
333 do_commitment_signed_dance(&nodes[1], &nodes[0], &updates_0_1.commitment_signed, true, true);
336 let mut updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
337 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
338 do_commitment_signed_dance(&nodes[0], &nodes[1], &updates.commitment_signed, false, false);
339 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
340 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
344 expect_pending_htlcs_forwardable!(nodes[1]);
345 check_added_monitors!(nodes[1], 1);
347 let mut updates_1_2 = get_htlc_update_msgs!(nodes[1], nodes[2].node.get_our_node_id());
348 let mut update_add = &mut updates_1_2.update_add_htlcs[0];
350 cause_error!(2, 3, update_add);
352 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &update_add);
353 check_added_monitors!(nodes[2], 0);
354 do_commitment_signed_dance(&nodes[2], &nodes[1], &updates_1_2.commitment_signed, true, true);
356 let mut updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
357 let update_malformed = &mut updates.update_fail_malformed_htlcs[0];
358 assert_eq!(update_malformed.failure_code, INVALID_ONION_BLINDING);
359 assert_eq!(update_malformed.sha256_of_onion, [0; 32]);
361 // Ensure the intro node will properly blind the error if its downstream node failed to do so.
362 update_malformed.sha256_of_onion = [1; 32];
363 update_malformed.failure_code = INVALID_ONION_BLINDING ^ 1;
364 nodes[1].node.handle_update_fail_malformed_htlc(&nodes[2].node.get_our_node_id(), update_malformed);
365 do_commitment_signed_dance(&nodes[1], &nodes[2], &updates.commitment_signed, true, false);
367 let mut updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
368 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
369 do_commitment_signed_dance(&nodes[0], &nodes[1], &updates.commitment_signed, false, false);
370 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
371 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
375 fn failed_backwards_to_intro_node() {
376 // Ensure the intro node will error backwards properly even if the downstream node did not blind
378 let chanmon_cfgs = create_chanmon_cfgs(3);
379 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
380 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
381 let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
382 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
383 let chan_upd_1_2 = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0).0.contents;
386 let (_, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[2], Some(amt_msat), None);
387 let route_params = get_blinded_route_parameters(amt_msat, payment_secret, 1, 1_0000_0000,
388 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(), &[&chan_upd_1_2],
389 &chanmon_cfgs[2].keys_manager);
391 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
392 check_added_monitors(&nodes[0], 1);
394 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
395 assert_eq!(events.len(), 1);
396 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
397 let mut payment_event = SendEvent::from_event(ev);
399 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
400 check_added_monitors!(nodes[1], 0);
401 do_commitment_signed_dance(&nodes[1], &nodes[0], &payment_event.commitment_msg, false, false);
402 expect_pending_htlcs_forwardable!(nodes[1]);
403 check_added_monitors!(&nodes[1], 1);
405 let mut events = nodes[1].node.get_and_clear_pending_msg_events();
406 assert_eq!(events.len(), 1);
407 let ev = remove_first_msg_event_to_node(&nodes[2].node.get_our_node_id(), &mut events);
408 let mut payment_event = SendEvent::from_event(ev);
410 // Ensure the final node fails to handle the HTLC.
411 payment_event.msgs[0].onion_routing_packet.hop_data[0] ^= 1;
412 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event.msgs[0]);
413 check_added_monitors!(nodes[2], 0);
414 do_commitment_signed_dance(&nodes[2], &nodes[1], &payment_event.commitment_msg, true, true);
415 nodes[2].node.process_pending_htlc_forwards();
417 let mut updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
418 let mut update_malformed = &mut updates.update_fail_malformed_htlcs[0];
419 // Check that the final node encodes its failure correctly.
420 assert_eq!(update_malformed.failure_code, INVALID_ONION_BLINDING);
421 assert_eq!(update_malformed.sha256_of_onion, [0; 32]);
423 // Modify such the final hop does not correctly blind their error so we can ensure the intro node
424 // converts it to the correct error.
425 update_malformed.sha256_of_onion = [1; 32];
426 nodes[1].node.handle_update_fail_malformed_htlc(&nodes[2].node.get_our_node_id(), update_malformed);
427 do_commitment_signed_dance(&nodes[1], &nodes[2], &updates.commitment_signed, true, false);
429 let mut updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
430 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
431 do_commitment_signed_dance(&nodes[0], &nodes[1], &updates.commitment_signed, false, false);
432 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
433 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
436 enum ProcessPendingHTLCsCheck {
442 fn forward_fail_in_process_pending_htlc_fwds() {
443 do_forward_fail_in_process_pending_htlc_fwds(ProcessPendingHTLCsCheck::FwdPeerDisconnected, true);
444 do_forward_fail_in_process_pending_htlc_fwds(ProcessPendingHTLCsCheck::FwdPeerDisconnected, false);
445 do_forward_fail_in_process_pending_htlc_fwds(ProcessPendingHTLCsCheck::FwdChannelClosed, true);
446 do_forward_fail_in_process_pending_htlc_fwds(ProcessPendingHTLCsCheck::FwdChannelClosed, false);
448 fn do_forward_fail_in_process_pending_htlc_fwds(check: ProcessPendingHTLCsCheck, intro_fails: bool) {
449 // Ensure the intro node will error backwards properly if the HTLC fails in
450 // process_pending_htlc_forwards.
451 let chanmon_cfgs = create_chanmon_cfgs(4);
452 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
453 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
454 let mut nodes = create_network(4, &node_cfgs, &node_chanmgrs);
455 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
456 let (chan_upd_1_2, chan_id_1_2) = {
457 let chan = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0);
458 (chan.0.contents, chan.2)
460 let (chan_upd_2_3, chan_id_2_3) = {
461 let chan = create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 1_000_000, 0);
462 (chan.0.contents, chan.2)
466 let (_, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[2], Some(amt_msat), None);
467 let route_params = get_blinded_route_parameters(amt_msat, payment_secret, 1, 1_0000_0000,
468 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(), &[&chan_upd_1_2, &chan_upd_2_3],
469 &chanmon_cfgs[2].keys_manager);
471 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
472 check_added_monitors(&nodes[0], 1);
474 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
475 assert_eq!(events.len(), 1);
476 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
477 let mut payment_event = SendEvent::from_event(ev);
479 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
480 check_added_monitors!(nodes[1], 0);
481 do_commitment_signed_dance(&nodes[1], &nodes[0], &payment_event.commitment_msg, false, false);
483 macro_rules! cause_error {
484 ($prev_node: expr, $curr_node: expr, $next_node: expr, $failed_chan_id: expr, $failed_scid: expr) => {
486 ProcessPendingHTLCsCheck::FwdPeerDisconnected => {
487 // Disconnect the next-hop peer so when we go to forward in process_pending_htlc_forwards, the
488 // intro node will error backwards.
489 $curr_node.node.peer_disconnected(&$next_node.node.get_our_node_id());
490 expect_pending_htlcs_forwardable!($curr_node);
491 expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore!($curr_node,
492 vec![HTLCDestination::NextHopChannel { node_id: Some($next_node.node.get_our_node_id()), channel_id: $failed_chan_id }]);
494 ProcessPendingHTLCsCheck::FwdChannelClosed => {
495 // Force close the next-hop channel so when we go to forward in process_pending_htlc_forwards,
496 // the intro node will error backwards.
497 $curr_node.node.force_close_broadcasting_latest_txn(&$failed_chan_id, &$next_node.node.get_our_node_id()).unwrap();
498 let events = $curr_node.node.get_and_clear_pending_events();
500 crate::events::Event::PendingHTLCsForwardable { .. } => {},
501 _ => panic!("Unexpected event {:?}", events),
504 crate::events::Event::ChannelClosed { .. } => {},
505 _ => panic!("Unexpected event {:?}", events),
508 $curr_node.node.process_pending_htlc_forwards();
509 expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore!($curr_node,
510 vec![HTLCDestination::UnknownNextHop { requested_forward_scid: $failed_scid }]);
511 check_closed_broadcast(&$curr_node, 1, true);
512 check_added_monitors!($curr_node, 1);
513 $curr_node.node.process_pending_htlc_forwards();
520 cause_error!(nodes[0], nodes[1], nodes[2], chan_id_1_2, chan_upd_1_2.short_channel_id);
521 let mut updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
522 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
523 check_added_monitors!(nodes[1], 1);
524 do_commitment_signed_dance(&nodes[0], &nodes[1], &updates.commitment_signed, false, false);
526 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
527 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
531 expect_pending_htlcs_forwardable!(nodes[1]);
532 check_added_monitors!(nodes[1], 1);
534 let mut updates_1_2 = get_htlc_update_msgs!(nodes[1], nodes[2].node.get_our_node_id());
535 let mut update_add = &mut updates_1_2.update_add_htlcs[0];
536 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &update_add);
537 check_added_monitors!(nodes[2], 0);
538 do_commitment_signed_dance(&nodes[2], &nodes[1], &updates_1_2.commitment_signed, true, true);
540 cause_error!(nodes[1], nodes[2], nodes[3], chan_id_2_3, chan_upd_2_3.short_channel_id);
541 check_added_monitors!(nodes[2], 1);
543 let mut updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
544 let update_malformed = &mut updates.update_fail_malformed_htlcs[0];
545 assert_eq!(update_malformed.failure_code, INVALID_ONION_BLINDING);
546 assert_eq!(update_malformed.sha256_of_onion, [0; 32]);
548 // Ensure the intro node will properly blind the error if its downstream node failed to do so.
549 update_malformed.sha256_of_onion = [1; 32];
550 update_malformed.failure_code = INVALID_ONION_BLINDING ^ 1;
551 nodes[1].node.handle_update_fail_malformed_htlc(&nodes[2].node.get_our_node_id(), update_malformed);
552 do_commitment_signed_dance(&nodes[1], &nodes[2], &updates.commitment_signed, true, false);
554 let mut updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
555 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
556 do_commitment_signed_dance(&nodes[0], &nodes[1], &updates.commitment_signed, false, false);
557 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
558 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
562 fn blinded_intercept_payment() {
563 do_blinded_intercept_payment(true);
564 do_blinded_intercept_payment(false);
566 fn do_blinded_intercept_payment(intercept_node_fails: bool) {
567 let chanmon_cfgs = create_chanmon_cfgs(3);
568 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
569 let mut intercept_forwards_config = test_default_channel_config();
570 intercept_forwards_config.accept_intercept_htlcs = true;
571 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, Some(intercept_forwards_config), None]);
572 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
573 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
574 let (channel_id, chan_upd) = {
575 let chan = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0);
576 (chan.2, chan.0.contents)
580 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[2], Some(amt_msat), None);
581 let intercept_scid = nodes[1].node.get_intercept_scid();
582 let mut intercept_chan_upd = chan_upd;
583 intercept_chan_upd.short_channel_id = intercept_scid;
584 let route_params = get_blinded_route_parameters(amt_msat, payment_secret, 1, 1_0000_0000,
585 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(), &[&intercept_chan_upd],
586 &chanmon_cfgs[2].keys_manager);
588 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(),
589 PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
590 check_added_monitors(&nodes[0], 1);
591 let payment_event = {
592 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
593 assert_eq!(events.len(), 1);
594 SendEvent::from_event(events.remove(0))
596 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
597 commitment_signed_dance!(nodes[1], nodes[0], &payment_event.commitment_msg, false, true);
599 let events = nodes[1].node.get_and_clear_pending_events();
600 assert_eq!(events.len(), 1);
601 let (intercept_id, expected_outbound_amount_msat) = match events[0] {
602 crate::events::Event::HTLCIntercepted {
603 intercept_id, payment_hash: pmt_hash,
604 requested_next_hop_scid: short_channel_id, expected_outbound_amount_msat, ..
606 assert_eq!(pmt_hash, payment_hash);
607 assert_eq!(short_channel_id, intercept_scid);
608 (intercept_id, expected_outbound_amount_msat)
613 if intercept_node_fails {
614 nodes[1].node.fail_intercepted_htlc(intercept_id).unwrap();
615 expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore!(nodes[1], vec![HTLCDestination::UnknownNextHop { requested_forward_scid: intercept_scid }]);
616 nodes[1].node.process_pending_htlc_forwards();
617 let update_fail = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
618 check_added_monitors!(&nodes[1], 1);
619 assert!(update_fail.update_fail_htlcs.len() == 1);
620 let fail_msg = update_fail.update_fail_htlcs[0].clone();
621 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &fail_msg);
622 commitment_signed_dance!(nodes[0], nodes[1], update_fail.commitment_signed, false);
623 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
624 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
628 nodes[1].node.forward_intercepted_htlc(intercept_id, &channel_id, nodes[2].node.get_our_node_id(), expected_outbound_amount_msat).unwrap();
629 expect_pending_htlcs_forwardable!(nodes[1]);
631 let payment_event = {
633 let mut added_monitors = nodes[1].chain_monitor.added_monitors.lock().unwrap();
634 assert_eq!(added_monitors.len(), 1);
635 added_monitors.clear();
637 let mut events = nodes[1].node.get_and_clear_pending_msg_events();
638 assert_eq!(events.len(), 1);
639 SendEvent::from_event(events.remove(0))
641 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event.msgs[0]);
642 commitment_signed_dance!(nodes[2], nodes[1], &payment_event.commitment_msg, false, true);
643 expect_pending_htlcs_forwardable!(nodes[2]);
645 expect_payment_claimable!(&nodes[2], payment_hash, payment_secret, amt_msat, None, nodes[2].node.get_our_node_id());
646 do_claim_payment_along_route(&nodes[0], &vec!(&vec!(&nodes[1], &nodes[2])[..]), false, payment_preimage);
647 expect_payment_sent(&nodes[0], payment_preimage, Some(Some(1000)), true, true);
651 fn two_hop_blinded_path_success() {
652 let chanmon_cfgs = create_chanmon_cfgs(3);
653 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
654 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
655 let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
656 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
657 let chan_upd_1_2 = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0).0.contents;
660 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[2], Some(amt_msat), None);
661 let route_params = get_blinded_route_parameters(amt_msat, payment_secret, 1, 1_0000_0000,
662 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(), &[&chan_upd_1_2],
663 &chanmon_cfgs[2].keys_manager);
665 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
666 check_added_monitors(&nodes[0], 1);
667 pass_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], amt_msat, payment_hash, payment_secret);
668 claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], payment_preimage);
672 fn three_hop_blinded_path_success() {
673 let chanmon_cfgs = create_chanmon_cfgs(5);
674 let node_cfgs = create_node_cfgs(5, &chanmon_cfgs);
675 let node_chanmgrs = create_node_chanmgrs(5, &node_cfgs, &[None, None, None, None, None]);
676 let mut nodes = create_network(5, &node_cfgs, &node_chanmgrs);
677 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
678 create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0);
679 let chan_upd_2_3 = create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 1_000_000, 0).0.contents;
680 let chan_upd_3_4 = create_announced_chan_between_nodes_with_value(&nodes, 3, 4, 1_000_000, 0).0.contents;
682 // Get all our nodes onto the same height so payments don't fail for CLTV violations.
683 connect_blocks(&nodes[0], nodes[4].best_block_info().1 - nodes[0].best_block_info().1);
684 connect_blocks(&nodes[1], nodes[4].best_block_info().1 - nodes[1].best_block_info().1);
685 connect_blocks(&nodes[2], nodes[4].best_block_info().1 - nodes[2].best_block_info().1);
686 assert_eq!(nodes[4].best_block_info().1, nodes[3].best_block_info().1);
689 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[4], Some(amt_msat), None);
690 let route_params = get_blinded_route_parameters(amt_msat, payment_secret, 1, 1_0000_0000,
691 nodes.iter().skip(2).map(|n| n.node.get_our_node_id()).collect(),
692 &[&chan_upd_2_3, &chan_upd_3_4], &chanmon_cfgs[4].keys_manager);
694 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
695 check_added_monitors(&nodes[0], 1);
696 pass_along_route(&nodes[0], &[&[&nodes[1], &nodes[2], &nodes[3], &nodes[4]]], amt_msat, payment_hash, payment_secret);
697 claim_payment(&nodes[0], &[&nodes[1], &nodes[2], &nodes[3], &nodes[4]], payment_preimage);
701 fn three_hop_blinded_path_fail() {
702 // Test that an intermediate blinded forwarding node gets failed back to with
703 // malformed and also fails back themselves with malformed.
704 let chanmon_cfgs = create_chanmon_cfgs(4);
705 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
706 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
707 let mut nodes = create_network(4, &node_cfgs, &node_chanmgrs);
708 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
709 let chan_upd_1_2 = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0).0.contents;
710 let chan_upd_2_3 = create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 1_000_000, 0).0.contents;
713 let (_, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[3], Some(amt_msat), None);
714 let route_params = get_blinded_route_parameters(amt_msat, payment_secret, 1, 1_0000_0000,
715 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(),
716 &[&chan_upd_1_2, &chan_upd_2_3], &chanmon_cfgs[3].keys_manager);
718 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
719 check_added_monitors(&nodes[0], 1);
720 pass_along_route(&nodes[0], &[&[&nodes[1], &nodes[2], &nodes[3]]], amt_msat, payment_hash, payment_secret);
722 nodes[3].node.fail_htlc_backwards(&payment_hash);
723 expect_pending_htlcs_forwardable_conditions(
724 nodes[3].node.get_and_clear_pending_events(), &[HTLCDestination::FailedPayment { payment_hash }]
726 nodes[3].node.process_pending_htlc_forwards();
727 check_added_monitors!(nodes[3], 1);
729 let updates_3_2 = get_htlc_update_msgs!(nodes[3], nodes[2].node.get_our_node_id());
730 assert_eq!(updates_3_2.update_fail_malformed_htlcs.len(), 1);
731 let update_malformed = &updates_3_2.update_fail_malformed_htlcs[0];
732 assert_eq!(update_malformed.sha256_of_onion, [0; 32]);
733 assert_eq!(update_malformed.failure_code, INVALID_ONION_BLINDING);
734 nodes[2].node.handle_update_fail_malformed_htlc(&nodes[3].node.get_our_node_id(), update_malformed);
735 do_commitment_signed_dance(&nodes[2], &nodes[3], &updates_3_2.commitment_signed, true, false);
737 let updates_2_1 = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
738 assert_eq!(updates_2_1.update_fail_malformed_htlcs.len(), 1);
739 let update_malformed = &updates_2_1.update_fail_malformed_htlcs[0];
740 assert_eq!(update_malformed.sha256_of_onion, [0; 32]);
741 assert_eq!(update_malformed.failure_code, INVALID_ONION_BLINDING);
742 nodes[1].node.handle_update_fail_malformed_htlc(&nodes[2].node.get_our_node_id(), update_malformed);
743 do_commitment_signed_dance(&nodes[1], &nodes[2], &updates_2_1.commitment_signed, true, false);
745 let updates_1_0 = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
746 assert_eq!(updates_1_0.update_fail_htlcs.len(), 1);
747 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates_1_0.update_fail_htlcs[0]);
748 do_commitment_signed_dance(&nodes[0], &nodes[1], &updates_1_0.commitment_signed, false, false);
749 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
750 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
754 enum ReceiveCheckFail {
755 // The recipient fails the payment upon `PaymentClaimable`.
757 // Failure to decode the recipient's onion payload.
759 // The incoming HTLC did not satisfy our requirements; in this case it underpaid us according to
760 // the expected receive amount in the onion.
762 // The incoming HTLC errors when added to the Channel, in this case due to the HTLC being
763 // delivered out-of-order with a shutdown message.
765 // The HTLC is successfully added to the inbound channel but fails receive checks in
766 // process_pending_htlc_forwards.
767 ProcessPendingHTLCsCheck,
768 // The HTLC violates the `PaymentConstraints` contained within the receiver's encrypted payload.
773 fn multi_hop_receiver_fail() {
774 do_multi_hop_receiver_fail(ReceiveCheckFail::RecipientFail);
775 do_multi_hop_receiver_fail(ReceiveCheckFail::OnionDecodeFail);
776 do_multi_hop_receiver_fail(ReceiveCheckFail::ReceiveRequirements);
777 do_multi_hop_receiver_fail(ReceiveCheckFail::ChannelCheck);
778 do_multi_hop_receiver_fail(ReceiveCheckFail::ProcessPendingHTLCsCheck);
779 do_multi_hop_receiver_fail(ReceiveCheckFail::PaymentConstraints);
782 fn do_multi_hop_receiver_fail(check: ReceiveCheckFail) {
783 // Test that the receiver to a multihop blinded path fails back correctly.
784 let chanmon_cfgs = create_chanmon_cfgs(3);
785 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
786 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
787 let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
788 // We need the session priv to construct an invalid onion packet later.
789 let session_priv = [3; 32];
790 *nodes[0].keys_manager.override_random_bytes.lock().unwrap() = Some(session_priv);
791 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
792 let (chan_upd_1_2, chan_id_1_2) = {
793 let (chan_upd, _, channel_id, ..) = create_announced_chan_between_nodes_with_value(
794 &nodes, 1, 2, 1_000_000, 0
796 (chan_upd.contents, channel_id)
800 let excess_final_cltv_delta_opt = if check == ReceiveCheckFail::ProcessPendingHTLCsCheck {
801 // Set the final CLTV expiry too low to trigger the failure in process_pending_htlc_forwards.
802 Some(TEST_FINAL_CLTV as u16 - 2)
804 let (_, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[2], Some(amt_msat), excess_final_cltv_delta_opt);
805 let mut route_params = get_blinded_route_parameters(amt_msat, payment_secret, 1, 1_0000_0000,
806 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(), &[&chan_upd_1_2],
807 &chanmon_cfgs[2].keys_manager);
809 let route = if check == ReceiveCheckFail::ProcessPendingHTLCsCheck {
810 let mut route = get_route(&nodes[0], &route_params).unwrap();
811 // Set the final CLTV expiry too low to trigger the failure in process_pending_htlc_forwards.
812 route.paths[0].hops.last_mut().map(|h| h.cltv_expiry_delta += excess_final_cltv_delta_opt.unwrap() as u32);
813 route.paths[0].blinded_tail.as_mut().map(|bt| bt.excess_final_cltv_expiry_delta = excess_final_cltv_delta_opt.unwrap() as u32);
815 } else if check == ReceiveCheckFail::PaymentConstraints {
816 // Create a blinded path where the receiver's encrypted payload has an htlc_minimum_msat that is
817 // violated by `amt_msat`, and stick it in the route_params without changing the corresponding
818 // BlindedPayInfo (to ensure pathfinding still succeeds).
819 let high_htlc_min_bp = {
820 let mut high_htlc_minimum_upd = chan_upd_1_2.clone();
821 high_htlc_minimum_upd.htlc_minimum_msat = amt_msat + 1000;
822 let high_htlc_min_params = get_blinded_route_parameters(amt_msat, payment_secret, 1, 1_0000_0000,
823 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(), &[&high_htlc_minimum_upd],
824 &chanmon_cfgs[2].keys_manager);
825 if let Payee::Blinded { route_hints, .. } = high_htlc_min_params.payment_params.payee {
826 route_hints[0].1.clone()
829 if let Payee::Blinded { ref mut route_hints, .. } = route_params.payment_params.payee {
830 route_hints[0].1 = high_htlc_min_bp;
832 find_route(&nodes[0], &route_params).unwrap()
834 find_route(&nodes[0], &route_params).unwrap()
836 node_cfgs[0].router.expect_find_route(route_params.clone(), Ok(route.clone()));
837 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
838 check_added_monitors(&nodes[0], 1);
840 let mut payment_event_0_1 = {
841 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
842 assert_eq!(events.len(), 1);
843 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
844 SendEvent::from_event(ev)
846 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event_0_1.msgs[0]);
847 check_added_monitors!(nodes[1], 0);
848 do_commitment_signed_dance(&nodes[1], &nodes[0], &payment_event_0_1.commitment_msg, false, false);
849 expect_pending_htlcs_forwardable!(nodes[1]);
850 check_added_monitors!(&nodes[1], 1);
852 let mut payment_event_1_2 = {
853 let mut events = nodes[1].node.get_and_clear_pending_msg_events();
854 assert_eq!(events.len(), 1);
855 let ev = remove_first_msg_event_to_node(&nodes[2].node.get_our_node_id(), &mut events);
856 SendEvent::from_event(ev)
860 ReceiveCheckFail::RecipientFail => {
861 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event_1_2.msgs[0]);
862 check_added_monitors!(nodes[2], 0);
863 do_commitment_signed_dance(&nodes[2], &nodes[1], &payment_event_1_2.commitment_msg, true, true);
864 expect_pending_htlcs_forwardable!(nodes[2]);
865 check_payment_claimable(
866 &nodes[2].node.get_and_clear_pending_events()[0], payment_hash, payment_secret, amt_msat,
867 None, nodes[2].node.get_our_node_id()
869 nodes[2].node.fail_htlc_backwards(&payment_hash);
870 expect_pending_htlcs_forwardable_conditions(
871 nodes[2].node.get_and_clear_pending_events(), &[HTLCDestination::FailedPayment { payment_hash }]
873 nodes[2].node.process_pending_htlc_forwards();
874 check_added_monitors!(nodes[2], 1);
876 ReceiveCheckFail::OnionDecodeFail => {
877 let session_priv = SecretKey::from_slice(&session_priv).unwrap();
878 let mut onion_keys = onion_utils::construct_onion_keys(&Secp256k1::new(), &route.paths[0], &session_priv).unwrap();
879 let cur_height = nodes[0].best_block_info().1;
880 let recipient_onion_fields = RecipientOnionFields::spontaneous_empty();
881 let (mut onion_payloads, ..) = onion_utils::build_onion_payloads(
882 &route.paths[0], amt_msat, &recipient_onion_fields, cur_height, &None).unwrap();
884 let update_add = &mut payment_event_1_2.msgs[0];
885 onion_payloads.last_mut().map(|p| {
886 if let msgs::OutboundOnionPayload::BlindedReceive { ref mut intro_node_blinding_point, .. } = p {
887 // The receiver should error if both the update_add blinding_point and the
888 // intro_node_blinding_point are set.
889 assert!(intro_node_blinding_point.is_none() && update_add.blinding_point.is_some());
890 *intro_node_blinding_point = Some(PublicKey::from_slice(&[2; 33]).unwrap());
893 update_add.onion_routing_packet = onion_utils::construct_onion_packet(
894 vec![onion_payloads.pop().unwrap()], vec![onion_keys.pop().unwrap()], [0; 32],
897 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), update_add);
898 check_added_monitors!(nodes[2], 0);
899 do_commitment_signed_dance(&nodes[2], &nodes[1], &payment_event_1_2.commitment_msg, true, true);
901 ReceiveCheckFail::ReceiveRequirements => {
902 let update_add = &mut payment_event_1_2.msgs[0];
903 update_add.amount_msat -= 1;
904 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), update_add);
905 check_added_monitors!(nodes[2], 0);
906 do_commitment_signed_dance(&nodes[2], &nodes[1], &payment_event_1_2.commitment_msg, true, true);
908 ReceiveCheckFail::ChannelCheck => {
909 nodes[2].node.close_channel(&chan_id_1_2, &nodes[1].node.get_our_node_id()).unwrap();
910 let node_2_shutdown = get_event_msg!(nodes[2], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
911 nodes[1].node.handle_shutdown(&nodes[2].node.get_our_node_id(), &node_2_shutdown);
912 let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[2].node.get_our_node_id());
914 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event_1_2.msgs[0]);
915 nodes[2].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &payment_event_1_2.commitment_msg);
916 check_added_monitors!(nodes[2], 1);
918 nodes[2].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
919 commitment_signed_dance!(nodes[2], nodes[1], (), false, true, false, false);
921 ReceiveCheckFail::ProcessPendingHTLCsCheck => {
922 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);
923 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event_1_2.msgs[0]);
924 check_added_monitors!(nodes[2], 0);
925 do_commitment_signed_dance(&nodes[2], &nodes[1], &payment_event_1_2.commitment_msg, true, true);
926 expect_pending_htlcs_forwardable!(nodes[2]);
927 expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore!(nodes[2],
928 vec![HTLCDestination::FailedPayment { payment_hash }]);
929 check_added_monitors!(nodes[2], 1);
931 ReceiveCheckFail::PaymentConstraints => {
932 nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event_1_2.msgs[0]);
933 check_added_monitors!(nodes[2], 0);
934 do_commitment_signed_dance(&nodes[2], &nodes[1], &payment_event_1_2.commitment_msg, true, true);
938 let updates_2_1 = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
939 assert_eq!(updates_2_1.update_fail_malformed_htlcs.len(), 1);
940 let update_malformed = &updates_2_1.update_fail_malformed_htlcs[0];
941 assert_eq!(update_malformed.sha256_of_onion, [0; 32]);
942 assert_eq!(update_malformed.failure_code, INVALID_ONION_BLINDING);
943 nodes[1].node.handle_update_fail_malformed_htlc(&nodes[2].node.get_our_node_id(), update_malformed);
944 do_commitment_signed_dance(&nodes[1], &nodes[2], &updates_2_1.commitment_signed, true, false);
946 let updates_1_0 = if check == ReceiveCheckFail::ChannelCheck {
947 let events = nodes[1].node.get_and_clear_pending_msg_events();
948 assert_eq!(events.len(), 2);
949 events.into_iter().find_map(|ev| {
951 MessageSendEvent:: UpdateHTLCs { node_id, updates } => {
952 assert_eq!(node_id, nodes[0].node.get_our_node_id());
955 MessageSendEvent::SendClosingSigned { .. } => None,
959 } else { get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id()) };
960 assert_eq!(updates_1_0.update_fail_htlcs.len(), 1);
961 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates_1_0.update_fail_htlcs[0]);
962 do_commitment_signed_dance(&nodes[0], &nodes[1], &updates_1_0.commitment_signed, false, false);
963 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
964 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
968 fn blinded_path_retries() {
969 let chanmon_cfgs = create_chanmon_cfgs(4);
970 // Make one blinded path's fees slightly higher so they are tried in a deterministic order.
971 let mut higher_fee_chan_cfg = test_default_channel_config();
972 higher_fee_chan_cfg.channel_config.forwarding_fee_base_msat += 1;
973 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
974 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, Some(higher_fee_chan_cfg), None]);
975 let mut nodes = create_network(4, &node_cfgs, &node_chanmgrs);
977 // Create this network topology so nodes[0] has a blinded route hint to retry over.
983 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
984 create_announced_chan_between_nodes_with_value(&nodes, 0, 2, 1_000_000, 0);
985 let chan_1_3 = create_announced_chan_between_nodes_with_value(&nodes, 1, 3, 1_000_000, 0);
986 let chan_2_3 = create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 1_000_000, 0);
989 let (_, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[3], Some(amt_msat), None);
991 let pay_params = PaymentParameters::blinded(
993 blinded_payment_path(payment_secret, 1, 1_0000_0000,
994 vec![nodes[1].node.get_our_node_id(), nodes[3].node.get_our_node_id()], &[&chan_1_3.0.contents],
995 &chanmon_cfgs[3].keys_manager
997 blinded_payment_path(payment_secret, 1, 1_0000_0000,
998 vec![nodes[2].node.get_our_node_id(), nodes[3].node.get_our_node_id()], &[&chan_2_3.0.contents],
999 &chanmon_cfgs[3].keys_manager
1003 .with_bolt12_features(channelmanager::provided_bolt12_invoice_features(&UserConfig::default()))
1005 RouteParameters::from_payment_params_and_value(pay_params, amt_msat)
1008 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params.clone(), Retry::Attempts(2)).unwrap();
1009 check_added_monitors(&nodes[0], 1);
1010 pass_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]]], amt_msat, payment_hash, payment_secret);
1012 macro_rules! fail_payment_back {
1013 ($intro_node: expr) => {
1014 nodes[3].node.fail_htlc_backwards(&payment_hash);
1015 expect_pending_htlcs_forwardable_conditions(
1016 nodes[3].node.get_and_clear_pending_events(), &[HTLCDestination::FailedPayment { payment_hash }]
1018 nodes[3].node.process_pending_htlc_forwards();
1019 check_added_monitors!(nodes[3], 1);
1021 let updates = get_htlc_update_msgs!(nodes[3], $intro_node.node.get_our_node_id());
1022 assert_eq!(updates.update_fail_malformed_htlcs.len(), 1);
1023 let update_malformed = &updates.update_fail_malformed_htlcs[0];
1024 assert_eq!(update_malformed.sha256_of_onion, [0; 32]);
1025 assert_eq!(update_malformed.failure_code, INVALID_ONION_BLINDING);
1026 $intro_node.node.handle_update_fail_malformed_htlc(&nodes[3].node.get_our_node_id(), update_malformed);
1027 do_commitment_signed_dance(&$intro_node, &nodes[3], &updates.commitment_signed, true, false);
1029 let updates = get_htlc_update_msgs!($intro_node, nodes[0].node.get_our_node_id());
1030 assert_eq!(updates.update_fail_htlcs.len(), 1);
1031 nodes[0].node.handle_update_fail_htlc(&$intro_node.node.get_our_node_id(), &updates.update_fail_htlcs[0]);
1032 do_commitment_signed_dance(&nodes[0], &$intro_node, &updates.commitment_signed, false, false);
1034 let mut events = nodes[0].node.get_and_clear_pending_events();
1035 assert_eq!(events.len(), 2);
1037 Event::PaymentPathFailed { payment_hash: ev_payment_hash, payment_failed_permanently, .. } => {
1038 assert_eq!(payment_hash, ev_payment_hash);
1039 assert_eq!(payment_failed_permanently, false);
1041 _ => panic!("Unexpected event"),
1044 Event::PendingHTLCsForwardable { .. } => {},
1045 _ => panic!("Unexpected event"),
1047 nodes[0].node.process_pending_htlc_forwards();
1051 fail_payment_back!(nodes[1]);
1053 // Pass the retry along.
1054 check_added_monitors!(nodes[0], 1);
1055 let mut msg_events = nodes[0].node.get_and_clear_pending_msg_events();
1056 assert_eq!(msg_events.len(), 1);
1057 pass_along_path(&nodes[0], &[&nodes[2], &nodes[3]], amt_msat, payment_hash, Some(payment_secret), msg_events.pop().unwrap(), true, None);
1059 fail_payment_back!(nodes[2]);
1060 let evs = nodes[0].node.get_and_clear_pending_events();
1061 assert_eq!(evs.len(), 1);
1063 Event::PaymentFailed { payment_hash: ev_payment_hash, reason, .. } => {
1064 assert_eq!(ev_payment_hash, payment_hash);
1065 // We have 1 retry attempt remaining, but we're out of blinded paths to try.
1066 assert_eq!(reason, Some(PaymentFailureReason::RouteNotFound));
1074 // The min htlc of a blinded path is the max (htlc_min - following_fees) along the path. Make sure
1075 // the payment succeeds when we calculate the min htlc this way.
1076 let chanmon_cfgs = create_chanmon_cfgs(4);
1077 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
1078 let mut node_1_cfg = test_default_channel_config();
1079 node_1_cfg.channel_handshake_config.our_htlc_minimum_msat = 2000;
1080 node_1_cfg.channel_config.forwarding_fee_base_msat = 1000;
1081 node_1_cfg.channel_config.forwarding_fee_proportional_millionths = 100_000;
1082 let mut node_2_cfg = test_default_channel_config();
1083 node_2_cfg.channel_handshake_config.our_htlc_minimum_msat = 5000;
1084 node_2_cfg.channel_config.forwarding_fee_base_msat = 200;
1085 node_2_cfg.channel_config.forwarding_fee_proportional_millionths = 150_000;
1086 let mut node_3_cfg = test_default_channel_config();
1087 node_3_cfg.channel_handshake_config.our_htlc_minimum_msat = 2000;
1088 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, Some(node_1_cfg), Some(node_2_cfg), Some(node_3_cfg)]);
1089 let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
1090 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
1091 let chan_1_2 = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0);
1092 let chan_2_3 = create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 1_000_000, 0);
1094 let min_htlc_msat = {
1095 // The min htlc for this setup is nodes[2]'s htlc_minimum_msat minus the
1097 let post_base_fee = chan_2_3.1.contents.htlc_minimum_msat - chan_2_3.0.contents.fee_base_msat as u64;
1098 let prop_fee = chan_2_3.0.contents.fee_proportional_millionths as u64;
1099 (post_base_fee * 1_000_000 + 1_000_000 + prop_fee - 1) / (prop_fee + 1_000_000)
1101 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[3], Some(min_htlc_msat), None);
1102 let mut route_params = get_blinded_route_parameters(
1103 min_htlc_msat, payment_secret, chan_1_2.1.contents.htlc_minimum_msat,
1104 chan_1_2.1.contents.htlc_maximum_msat, vec![nodes[1].node.get_our_node_id(),
1105 nodes[2].node.get_our_node_id(), nodes[3].node.get_our_node_id()],
1106 &[&chan_1_2.0.contents, &chan_2_3.0.contents], &chanmon_cfgs[3].keys_manager);
1107 assert_eq!(min_htlc_msat,
1108 route_params.payment_params.payee.blinded_route_hints()[0].0.htlc_minimum_msat);
1110 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params.clone(), Retry::Attempts(0)).unwrap();
1111 check_added_monitors(&nodes[0], 1);
1112 pass_along_route(&nodes[0], &[&[&nodes[1], &nodes[2], &nodes[3]]], min_htlc_msat, payment_hash, payment_secret);
1113 claim_payment(&nodes[0], &[&nodes[1], &nodes[2], &nodes[3]], payment_preimage);
1115 // Paying 1 less than the min fails.
1116 for _ in 0..IDEMPOTENCY_TIMEOUT_TICKS + 1 {
1117 nodes[0].node.timer_tick_occurred();
1119 if let Payee::Blinded { ref mut route_hints, .. } = route_params.payment_params.payee {
1120 route_hints[0].0.htlc_minimum_msat -= 1;
1122 route_params.final_value_msat -= 1;
1123 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
1124 check_added_monitors(&nodes[0], 1);
1126 let mut payment_event_0_1 = {
1127 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
1128 assert_eq!(events.len(), 1);
1129 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
1130 SendEvent::from_event(ev)
1132 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event_0_1.msgs[0]);
1133 check_added_monitors!(nodes[1], 0);
1134 do_commitment_signed_dance(&nodes[1], &nodes[0], &payment_event_0_1.commitment_msg, true, true);
1135 let mut updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
1136 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
1137 do_commitment_signed_dance(&nodes[0], &nodes[1], &updates.commitment_signed, false, false);
1138 expect_payment_failed_conditions(&nodes[0], payment_hash, false,
1139 PaymentFailedConditions::new().expected_htlc_error_data(INVALID_ONION_BLINDING, &[0; 32]));
1143 fn conditionally_round_fwd_amt() {
1144 // Previously, the (rng-found) feerates below caught a bug where an intermediate node would
1145 // calculate an amt_to_forward that underpaid them by 1 msat, caused by rounding up the outbound
1146 // amount on top of an already rounded-up total routing fee. Ensure that we'll conditionally round
1147 // down intermediate nodes' outbound amounts based on whether rounding up will result in
1148 // undercharging for relay.
1149 let chanmon_cfgs = create_chanmon_cfgs(5);
1150 let node_cfgs = create_node_cfgs(5, &chanmon_cfgs);
1152 let mut node_1_cfg = test_default_channel_config();
1153 node_1_cfg.channel_config.forwarding_fee_base_msat = 247371;
1154 node_1_cfg.channel_config.forwarding_fee_proportional_millionths = 86552;
1156 let mut node_2_cfg = test_default_channel_config();
1157 node_2_cfg.channel_config.forwarding_fee_base_msat = 198921;
1158 node_2_cfg.channel_config.forwarding_fee_proportional_millionths = 681759;
1160 let mut node_3_cfg = test_default_channel_config();
1161 node_3_cfg.channel_config.forwarding_fee_base_msat = 132845;
1162 node_3_cfg.channel_config.forwarding_fee_proportional_millionths = 552561;
1164 let node_chanmgrs = create_node_chanmgrs(5, &node_cfgs, &[None, Some(node_1_cfg), Some(node_2_cfg), Some(node_3_cfg), None]);
1165 let nodes = create_network(5, &node_cfgs, &node_chanmgrs);
1166 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
1167 let chan_1_2 = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0);
1168 let chan_2_3 = create_announced_chan_between_nodes_with_value(&nodes, 2, 3, 1_000_000, 0);
1169 let chan_3_4 = create_announced_chan_between_nodes_with_value(&nodes, 3, 4, 1_000_000, 0);
1171 let amt_msat = 100_000;
1172 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[4], Some(amt_msat), None);
1173 let mut route_params = get_blinded_route_parameters(amt_msat, payment_secret,
1174 chan_1_2.1.contents.htlc_minimum_msat, chan_1_2.1.contents.htlc_maximum_msat,
1175 vec![nodes[1].node.get_our_node_id(), nodes[2].node.get_our_node_id(),
1176 nodes[3].node.get_our_node_id(), nodes[4].node.get_our_node_id()],
1177 &[&chan_1_2.0.contents, &chan_2_3.0.contents, &chan_3_4.0.contents],
1178 &chanmon_cfgs[4].keys_manager);
1179 route_params.max_total_routing_fee_msat = None;
1181 nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
1182 check_added_monitors(&nodes[0], 1);
1183 pass_along_route(&nodes[0], &[&[&nodes[1], &nodes[2], &nodes[3], &nodes[4]]], amt_msat, payment_hash, payment_secret);
1184 nodes[4].node.claim_funds(payment_preimage);
1185 let expected_path = &[&nodes[1], &nodes[2], &nodes[3], &nodes[4]];
1186 let expected_route = &[&expected_path[..]];
1187 let mut args = ClaimAlongRouteArgs::new(&nodes[0], &expected_route[..], payment_preimage)
1188 .allow_1_msat_fee_overpay();
1189 let expected_fee = pass_claimed_payment_along_route(args);
1190 expect_payment_sent(&nodes[0], payment_preimage, Some(Some(expected_fee)), true, true);
1194 fn blinded_keysend() {
1195 let mut mpp_keysend_config = test_default_channel_config();
1196 mpp_keysend_config.accept_mpp_keysend = true;
1197 let chanmon_cfgs = create_chanmon_cfgs(3);
1198 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1199 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, Some(mpp_keysend_config)]);
1200 let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1201 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
1202 let chan_upd_1_2 = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 1_000_000, 0).0.contents;
1204 let amt_msat = 5000;
1205 let (keysend_preimage, _, payment_secret) = get_payment_preimage_hash(&nodes[2], None, None);
1206 let route_params = get_blinded_route_parameters(amt_msat, payment_secret, 1,
1208 nodes.iter().skip(1).map(|n| n.node.get_our_node_id()).collect(),
1209 &[&chan_upd_1_2], &chanmon_cfgs[2].keys_manager);
1211 let payment_hash = nodes[0].node.send_spontaneous_payment_with_retry(Some(keysend_preimage), RecipientOnionFields::spontaneous_empty(), PaymentId(keysend_preimage.0), route_params, Retry::Attempts(0)).unwrap();
1212 check_added_monitors(&nodes[0], 1);
1214 let expected_route: &[&[&Node]] = &[&[&nodes[1], &nodes[2]]];
1215 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
1216 assert_eq!(events.len(), 1);
1218 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
1219 pass_along_path(&nodes[0], expected_route[0], amt_msat, payment_hash, Some(payment_secret), ev.clone(), true, Some(keysend_preimage));
1220 claim_payment_along_route(&nodes[0], expected_route, false, keysend_preimage);
1224 fn blinded_mpp_keysend() {
1225 let mut mpp_keysend_config = test_default_channel_config();
1226 mpp_keysend_config.accept_mpp_keysend = true;
1227 let chanmon_cfgs = create_chanmon_cfgs(4);
1228 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
1229 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, Some(mpp_keysend_config)]);
1230 let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
1232 create_announced_chan_between_nodes(&nodes, 0, 1);
1233 create_announced_chan_between_nodes(&nodes, 0, 2);
1234 let chan_1_3 = create_announced_chan_between_nodes(&nodes, 1, 3);
1235 let chan_2_3 = create_announced_chan_between_nodes(&nodes, 2, 3);
1237 let amt_msat = 15_000_000;
1238 let (keysend_preimage, _, payment_secret) = get_payment_preimage_hash(&nodes[3], None, None);
1239 let route_params = {
1240 let pay_params = PaymentParameters::blinded(
1242 blinded_payment_path(payment_secret, 1, 1_0000_0000,
1243 vec![nodes[1].node.get_our_node_id(), nodes[3].node.get_our_node_id()], &[&chan_1_3.0.contents],
1244 &chanmon_cfgs[3].keys_manager
1246 blinded_payment_path(payment_secret, 1, 1_0000_0000,
1247 vec![nodes[2].node.get_our_node_id(), nodes[3].node.get_our_node_id()], &[&chan_2_3.0.contents],
1248 &chanmon_cfgs[3].keys_manager
1252 .with_bolt12_features(channelmanager::provided_bolt12_invoice_features(&UserConfig::default()))
1254 RouteParameters::from_payment_params_and_value(pay_params, amt_msat)
1257 let payment_hash = nodes[0].node.send_spontaneous_payment_with_retry(Some(keysend_preimage), RecipientOnionFields::spontaneous_empty(), PaymentId(keysend_preimage.0), route_params, Retry::Attempts(0)).unwrap();
1258 check_added_monitors!(nodes[0], 2);
1260 let expected_route: &[&[&Node]] = &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]];
1261 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
1262 assert_eq!(events.len(), 2);
1264 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
1265 pass_along_path(&nodes[0], expected_route[0], amt_msat, payment_hash.clone(),
1266 Some(payment_secret), ev.clone(), false, Some(keysend_preimage));
1268 let ev = remove_first_msg_event_to_node(&nodes[2].node.get_our_node_id(), &mut events);
1269 pass_along_path(&nodes[0], expected_route[1], amt_msat, payment_hash.clone(),
1270 Some(payment_secret), ev.clone(), true, Some(keysend_preimage));
1271 claim_payment_along_route(&nodes[0], expected_route, false, keysend_preimage);
1275 fn custom_tlvs_to_blinded_path() {
1276 let chanmon_cfgs = create_chanmon_cfgs(2);
1277 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1278 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
1279 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1280 let chan_upd = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0).0.contents;
1282 let amt_msat = 5000;
1283 let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash(&nodes[1], Some(amt_msat), None);
1284 let payee_tlvs = ReceiveTlvs {
1286 payment_constraints: PaymentConstraints {
1287 max_cltv_expiry: u32::max_value(),
1288 htlc_minimum_msat: chan_upd.htlc_minimum_msat,
1290 payment_context: PaymentContext::unknown(),
1292 let mut secp_ctx = Secp256k1::new();
1293 let blinded_path = BlindedPath::one_hop_for_payment(
1294 nodes[1].node.get_our_node_id(), payee_tlvs, TEST_FINAL_CLTV as u16,
1295 &chanmon_cfgs[1].keys_manager, &secp_ctx
1298 let route_params = RouteParameters::from_payment_params_and_value(
1299 PaymentParameters::blinded(vec![blinded_path]),
1303 let recipient_onion_fields = RecipientOnionFields::spontaneous_empty()
1304 .with_custom_tlvs(vec![((1 << 16) + 1, vec![42, 42])])
1306 nodes[0].node.send_payment(payment_hash, recipient_onion_fields.clone(),
1307 PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
1308 check_added_monitors(&nodes[0], 1);
1310 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
1311 assert_eq!(events.len(), 1);
1312 let ev = remove_first_msg_event_to_node(&nodes[1].node.get_our_node_id(), &mut events);
1314 let path = &[&nodes[1]];
1315 let args = PassAlongPathArgs::new(&nodes[0], path, amt_msat, payment_hash, ev)
1316 .with_payment_secret(payment_secret)
1317 .with_custom_tlvs(recipient_onion_fields.custom_tlvs.clone());
1318 do_pass_along_path(args);
1319 claim_payment(&nodes[0], &[&nodes[1]], payment_preimage);