_ Git - rust-lightning/blob - lightning/src/ln/offers_tests.rs

   1 // This file is Copyright its original authors, visible in version control
   2 // history.
   3 //
   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
   8 // licenses.
   9
  10 //! Functional tests for the BOLT 12 Offers payment flow.
  11 //!
  12 //! [`ChannelManager`] provides utilities to create [`Offer`]s and [`Refund`]s along with utilities
  13 //! to initiate and request payment for them, respectively. It also manages the payment flow via
  14 //! implementing [`OffersMessageHandler`]. This module tests that functionality, including the
  15 //! resulting [`Event`] generation.
  16 //!
  17 //! Two-node success tests use an announced channel:
  18 //!
  19 //! Alice --- Bob
  20 //!
  21 //! While two-node failure tests use an unannounced channel:
  22 //!
  23 //! Alice ... Bob
  24 //!
  25 //! Six-node tests use unannounced channels for the sender and recipient and announced channels for
  26 //! the rest of the network.
  27 //!
  28 //!               nodes[4]
  29 //!              /        \
  30 //!             /          \
  31 //!            /            \
  32 //! Alice ... Bob -------- Charlie ... David
  33 //!            \            /
  34 //!             \          /
  35 //!              \        /
  36 //!               nodes[5]
  37 //!
  38 //! Unnamed nodes are needed to ensure unannounced nodes can create two-hop blinded paths.
  39 //!
  40 //! Nodes without channels are disconnected and connected as needed to ensure that deterministic
  41 //! blinded paths are used.
  42
  43 use core::time::Duration;
  44 use crate::blinded_path::BlindedPath;
  45 use crate::events::{Event, MessageSendEventsProvider, PaymentPurpose};
  46 use crate::ln::channelmanager::{PaymentId, RecentPaymentDetails, Retry, self};
  47 use crate::ln::functional_test_utils::*;
  48 use crate::ln::msgs::{ChannelMessageHandler, Init, NodeAnnouncement, OnionMessage, OnionMessageHandler, RoutingMessageHandler, SocketAddress, UnsignedGossipMessage, UnsignedNodeAnnouncement};
  49 use crate::offers::invoice::Bolt12Invoice;
  50 use crate::offers::invoice_error::InvoiceError;
  51 use crate::offers::invoice_request::InvoiceRequest;
  52 use crate::offers::parse::Bolt12SemanticError;
  53 use crate::onion_message::messenger::PeeledOnion;
  54 use crate::onion_message::offers::OffersMessage;
  55 use crate::onion_message::packet::ParsedOnionMessageContents;
  56 use crate::routing::gossip::{NodeAlias, NodeId};
  57 use crate::sign::{NodeSigner, Recipient};
  58
  59 use crate::prelude::*;
  60
  61 macro_rules! expect_recent_payment {
  62         ($node: expr, $payment_state: path, $payment_id: expr) => {
  63                 match $node.node.list_recent_payments().first() {
  64                         Some(&$payment_state { payment_id: actual_payment_id, .. }) => {
  65                                 assert_eq!($payment_id, actual_payment_id);
  66                         },
  67                         Some(_) => panic!("Unexpected recent payment state"),
  68                         None => panic!("No recent payments"),
  69                 }
  70         }
  71 }
  72
  73 fn connect_peers<'a, 'b, 'c>(node_a: &Node<'a, 'b, 'c>, node_b: &Node<'a, 'b, 'c>) {
  74         let node_id_a = node_a.node.get_our_node_id();
  75         let node_id_b = node_b.node.get_our_node_id();
  76
  77         let init_a = Init {
  78                 features: node_a.init_features(&node_id_b),
  79                 networks: None,
  80                 remote_network_address: None,
  81         };
  82         let init_b = Init {
  83                 features: node_b.init_features(&node_id_a),
  84                 networks: None,
  85                 remote_network_address: None,
  86         };
  87
  88         node_a.node.peer_connected(&node_id_b, &init_b, true).unwrap();
  89         node_b.node.peer_connected(&node_id_a, &init_a, false).unwrap();
  90         node_a.onion_messenger.peer_connected(&node_id_b, &init_b, true).unwrap();
  91         node_b.onion_messenger.peer_connected(&node_id_a, &init_a, false).unwrap();
  92 }
  93
  94 fn disconnect_peers<'a, 'b, 'c>(node_a: &Node<'a, 'b, 'c>, peers: &[&Node<'a, 'b, 'c>]) {
  95         for node_b in peers {
  96                 node_a.node.peer_disconnected(&node_b.node.get_our_node_id());
  97                 node_b.node.peer_disconnected(&node_a.node.get_our_node_id());
  98                 node_a.onion_messenger.peer_disconnected(&node_b.node.get_our_node_id());
  99                 node_b.onion_messenger.peer_disconnected(&node_a.node.get_our_node_id());
 100         }
 101 }
 102
 103 fn announce_node_address<'a, 'b, 'c>(
 104         node: &Node<'a, 'b, 'c>, peers: &[&Node<'a, 'b, 'c>], address: SocketAddress,
 105 ) {
 106         let features = node.onion_messenger.provided_node_features()
 107                 | node.gossip_sync.provided_node_features();
 108         let rgb = [0u8; 3];
 109         let announcement = UnsignedNodeAnnouncement {
 110                 features,
 111                 timestamp: 1000,
 112                 node_id: NodeId::from_pubkey(&node.keys_manager.get_node_id(Recipient::Node).unwrap()),
 113                 rgb,
 114                 alias: NodeAlias([0u8; 32]),
 115                 addresses: vec![address],
 116                 excess_address_data: Vec::new(),
 117                 excess_data: Vec::new(),
 118         };
 119         let signature = node.keys_manager.sign_gossip_message(
 120                 UnsignedGossipMessage::NodeAnnouncement(&announcement)
 121         ).unwrap();
 122
 123         let msg = NodeAnnouncement {
 124                 signature,
 125                 contents: announcement
 126         };
 127
 128         node.gossip_sync.handle_node_announcement(&msg).unwrap();
 129         for peer in peers {
 130                 peer.gossip_sync.handle_node_announcement(&msg).unwrap();
 131         }
 132 }
 133
 134 fn route_bolt12_payment<'a, 'b, 'c>(
 135         node: &Node<'a, 'b, 'c>, path: &[&Node<'a, 'b, 'c>], invoice: &Bolt12Invoice
 136 ) {
 137         // Monitor added when handling the invoice onion message.
 138         check_added_monitors(node, 1);
 139
 140         let mut events = node.node.get_and_clear_pending_msg_events();
 141         assert_eq!(events.len(), 1);
 142         let ev = remove_first_msg_event_to_node(&path[0].node.get_our_node_id(), &mut events);
 143
 144         // Use a fake payment_hash and bypass checking for the PaymentClaimable event since the
 145         // invoice contains the payment_hash but it was encrypted inside an onion message.
 146         let amount_msats = invoice.amount_msats();
 147         let payment_hash = invoice.payment_hash();
 148         do_pass_along_path(
 149                 node, path, amount_msats, payment_hash, None, ev, false, false, None, false
 150         );
 151 }
 152
 153 fn claim_bolt12_payment<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, path: &[&Node<'a, 'b, 'c>]) {
 154         let recipient = &path[path.len() - 1];
 155         match get_event!(recipient, Event::PaymentClaimable) {
 156                 Event::PaymentClaimable {
 157                         purpose: PaymentPurpose::InvoicePayment {
 158                                 payment_preimage: Some(payment_preimage), ..
 159                         }, ..
 160                 } => claim_payment(node, path, payment_preimage),
 161                 _ => panic!(),
 162         };
 163 }
 164
 165 fn extract_invoice_request<'a, 'b, 'c>(
 166         node: &Node<'a, 'b, 'c>, message: &OnionMessage
 167 ) -> (InvoiceRequest, Option<BlindedPath>) {
 168         match node.onion_messenger.peel_onion_message(message) {
 169                 Ok(PeeledOnion::Receive(message, _, reply_path)) => match message {
 170                         ParsedOnionMessageContents::Offers(offers_message) => match offers_message {
 171                                 OffersMessage::InvoiceRequest(invoice_request) => (invoice_request, reply_path),
 172                                 OffersMessage::Invoice(invoice) => panic!("Unexpected invoice: {:?}", invoice),
 173                                 OffersMessage::InvoiceError(error) => panic!("Unexpected invoice_error: {:?}", error),
 174                         },
 175                         ParsedOnionMessageContents::Custom(message) => panic!("Unexpected custom message: {:?}", message),
 176                 },
 177                 Ok(PeeledOnion::Forward(_, _)) => panic!("Unexpected onion message forward"),
 178                 Err(e) => panic!("Failed to process onion message {:?}", e),
 179         }
 180 }
 181
 182 fn extract_invoice<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, message: &OnionMessage) -> Bolt12Invoice {
 183         match node.onion_messenger.peel_onion_message(message) {
 184                 Ok(PeeledOnion::Receive(message, _, _)) => match message {
 185                         ParsedOnionMessageContents::Offers(offers_message) => match offers_message {
 186                                 OffersMessage::InvoiceRequest(invoice_request) => panic!("Unexpected invoice_request: {:?}", invoice_request),
 187                                 OffersMessage::Invoice(invoice) => invoice,
 188                                 OffersMessage::InvoiceError(error) => panic!("Unexpected invoice_error: {:?}", error),
 189                         },
 190                         ParsedOnionMessageContents::Custom(message) => panic!("Unexpected custom message: {:?}", message),
 191                 },
 192                 Ok(PeeledOnion::Forward(_, _)) => panic!("Unexpected onion message forward"),
 193                 Err(e) => panic!("Failed to process onion message {:?}", e),
 194         }
 195 }
 196
 197 fn extract_invoice_error<'a, 'b, 'c>(
 198         node: &Node<'a, 'b, 'c>, message: &OnionMessage
 199 ) -> InvoiceError {
 200         match node.onion_messenger.peel_onion_message(message) {
 201                 Ok(PeeledOnion::Receive(message, _, _)) => match message {
 202                         ParsedOnionMessageContents::Offers(offers_message) => match offers_message {
 203                                 OffersMessage::InvoiceRequest(invoice_request) => panic!("Unexpected invoice_request: {:?}", invoice_request),
 204                                 OffersMessage::Invoice(invoice) => panic!("Unexpected invoice: {:?}", invoice),
 205                                 OffersMessage::InvoiceError(error) => error,
 206                         },
 207                         ParsedOnionMessageContents::Custom(message) => panic!("Unexpected custom message: {:?}", message),
 208                 },
 209                 Ok(PeeledOnion::Forward(_, _)) => panic!("Unexpected onion message forward"),
 210                 Err(e) => panic!("Failed to process onion message {:?}", e),
 211         }
 212 }
 213
 214 /// Checks that blinded paths without Tor-only nodes are preferred when constructing an offer.
 215 #[test]
 216 fn prefers_non_tor_nodes_in_blinded_paths() {
 217         let mut accept_forward_cfg = test_default_channel_config();
 218         accept_forward_cfg.accept_forwards_to_priv_channels = true;
 219
 220         let mut features = channelmanager::provided_init_features(&accept_forward_cfg);
 221         features.set_onion_messages_optional();
 222         features.set_route_blinding_optional();
 223
 224         let chanmon_cfgs = create_chanmon_cfgs(6);
 225         let node_cfgs = create_node_cfgs(6, &chanmon_cfgs);
 226
 227         *node_cfgs[1].override_init_features.borrow_mut() = Some(features);
 228
 229         let node_chanmgrs = create_node_chanmgrs(
 230                 6, &node_cfgs, &[None, Some(accept_forward_cfg), None, None, None, None]
 231         );
 232         let nodes = create_network(6, &node_cfgs, &node_chanmgrs);
 233
 234         create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 235         create_unannounced_chan_between_nodes_with_value(&nodes, 2, 3, 10_000_000, 1_000_000_000);
 236         create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 10_000_000, 1_000_000_000);
 237         create_announced_chan_between_nodes_with_value(&nodes, 1, 4, 10_000_000, 1_000_000_000);
 238         create_announced_chan_between_nodes_with_value(&nodes, 1, 5, 10_000_000, 1_000_000_000);
 239         create_announced_chan_between_nodes_with_value(&nodes, 2, 4, 10_000_000, 1_000_000_000);
 240         create_announced_chan_between_nodes_with_value(&nodes, 2, 5, 10_000_000, 1_000_000_000);
 241
 242         // Add an extra channel so that more than one of Bob's peers have MIN_PEER_CHANNELS.
 243         create_announced_chan_between_nodes_with_value(&nodes, 4, 5, 10_000_000, 1_000_000_000);
 244
 245         let (alice, bob, charlie, david) = (&nodes[0], &nodes[1], &nodes[2], &nodes[3]);
 246         let bob_id = bob.node.get_our_node_id();
 247         let charlie_id = charlie.node.get_our_node_id();
 248
 249         disconnect_peers(alice, &[charlie, david, &nodes[4], &nodes[5]]);
 250         disconnect_peers(david, &[bob, &nodes[4], &nodes[5]]);
 251
 252         let tor = SocketAddress::OnionV2([255, 254, 253, 252, 251, 250, 249, 248, 247, 246, 38, 7]);
 253         announce_node_address(charlie, &[alice, bob, david, &nodes[4], &nodes[5]], tor);
 254
 255         let offer = bob.node
 256                 .create_offer_builder("coffee".to_string()).unwrap()
 257                 .amount_msats(10_000_000)
 258                 .build().unwrap();
 259         assert_ne!(offer.signing_pubkey(), bob_id);
 260         assert!(!offer.paths().is_empty());
 261         for path in offer.paths() {
 262                 assert_ne!(path.introduction_node_id, charlie_id);
 263         }
 264 }
 265
 266 /// Checks that an offer can be paid through blinded paths and that ephemeral pubkeys are used
 267 /// rather than exposing a node's pubkey.
 268 #[test]
 269 fn creates_and_pays_for_offer_using_two_hop_blinded_path() {
 270         let mut accept_forward_cfg = test_default_channel_config();
 271         accept_forward_cfg.accept_forwards_to_priv_channels = true;
 272
 273         let mut features = channelmanager::provided_init_features(&accept_forward_cfg);
 274         features.set_onion_messages_optional();
 275         features.set_route_blinding_optional();
 276
 277         let chanmon_cfgs = create_chanmon_cfgs(6);
 278         let node_cfgs = create_node_cfgs(6, &chanmon_cfgs);
 279
 280         *node_cfgs[1].override_init_features.borrow_mut() = Some(features);
 281
 282         let node_chanmgrs = create_node_chanmgrs(
 283                 6, &node_cfgs, &[None, Some(accept_forward_cfg), None, None, None, None]
 284         );
 285         let nodes = create_network(6, &node_cfgs, &node_chanmgrs);
 286
 287         create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 288         create_unannounced_chan_between_nodes_with_value(&nodes, 2, 3, 10_000_000, 1_000_000_000);
 289         create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 10_000_000, 1_000_000_000);
 290         create_announced_chan_between_nodes_with_value(&nodes, 1, 4, 10_000_000, 1_000_000_000);
 291         create_announced_chan_between_nodes_with_value(&nodes, 1, 5, 10_000_000, 1_000_000_000);
 292         create_announced_chan_between_nodes_with_value(&nodes, 2, 4, 10_000_000, 1_000_000_000);
 293         create_announced_chan_between_nodes_with_value(&nodes, 2, 5, 10_000_000, 1_000_000_000);
 294
 295         let (alice, bob, charlie, david) = (&nodes[0], &nodes[1], &nodes[2], &nodes[3]);
 296         let alice_id = alice.node.get_our_node_id();
 297         let bob_id = bob.node.get_our_node_id();
 298         let charlie_id = charlie.node.get_our_node_id();
 299         let david_id = david.node.get_our_node_id();
 300
 301         disconnect_peers(alice, &[charlie, david, &nodes[4], &nodes[5]]);
 302         disconnect_peers(david, &[bob, &nodes[4], &nodes[5]]);
 303
 304         let offer = alice.node
 305                 .create_offer_builder("coffee".to_string()).unwrap()
 306                 .amount_msats(10_000_000)
 307                 .build().unwrap();
 308         assert_ne!(offer.signing_pubkey(), alice_id);
 309         assert!(!offer.paths().is_empty());
 310         for path in offer.paths() {
 311                 assert_eq!(path.introduction_node_id, bob_id);
 312         }
 313
 314         let payment_id = PaymentId([1; 32]);
 315         david.node.pay_for_offer(&offer, None, None, None, payment_id, Retry::Attempts(0), None)
 316                 .unwrap();
 317         expect_recent_payment!(david, RecentPaymentDetails::AwaitingInvoice, payment_id);
 318
 319         connect_peers(david, bob);
 320
 321         let onion_message = david.onion_messenger.next_onion_message_for_peer(bob_id).unwrap();
 322         bob.onion_messenger.handle_onion_message(&david_id, &onion_message);
 323
 324         connect_peers(alice, charlie);
 325
 326         let onion_message = bob.onion_messenger.next_onion_message_for_peer(alice_id).unwrap();
 327         alice.onion_messenger.handle_onion_message(&bob_id, &onion_message);
 328
 329         let (invoice_request, reply_path) = extract_invoice_request(alice, &onion_message);
 330         assert_eq!(invoice_request.amount_msats(), None);
 331         assert_ne!(invoice_request.payer_id(), david_id);
 332         assert_eq!(reply_path.unwrap().introduction_node_id, charlie_id);
 333
 334         let onion_message = alice.onion_messenger.next_onion_message_for_peer(charlie_id).unwrap();
 335         charlie.onion_messenger.handle_onion_message(&alice_id, &onion_message);
 336
 337         let onion_message = charlie.onion_messenger.next_onion_message_for_peer(david_id).unwrap();
 338         david.onion_messenger.handle_onion_message(&charlie_id, &onion_message);
 339
 340         let invoice = extract_invoice(david, &onion_message);
 341         assert_eq!(invoice.amount_msats(), 10_000_000);
 342         assert_ne!(invoice.signing_pubkey(), alice_id);
 343         assert!(!invoice.payment_paths().is_empty());
 344         for (_, path) in invoice.payment_paths() {
 345                 assert_eq!(path.introduction_node_id, bob_id);
 346         }
 347
 348         route_bolt12_payment(david, &[charlie, bob, alice], &invoice);
 349         expect_recent_payment!(david, RecentPaymentDetails::Pending, payment_id);
 350
 351         claim_bolt12_payment(david, &[charlie, bob, alice]);
 352         expect_recent_payment!(david, RecentPaymentDetails::Fulfilled, payment_id);
 353 }
 354
 355 /// Checks that a refund can be paid through blinded paths and that ephemeral pubkeys are used
 356 /// rather than exposing a node's pubkey.
 357 #[test]
 358 fn creates_and_pays_for_refund_using_two_hop_blinded_path() {
 359         let mut accept_forward_cfg = test_default_channel_config();
 360         accept_forward_cfg.accept_forwards_to_priv_channels = true;
 361
 362         let mut features = channelmanager::provided_init_features(&accept_forward_cfg);
 363         features.set_onion_messages_optional();
 364         features.set_route_blinding_optional();
 365
 366         let chanmon_cfgs = create_chanmon_cfgs(6);
 367         let node_cfgs = create_node_cfgs(6, &chanmon_cfgs);
 368
 369         *node_cfgs[1].override_init_features.borrow_mut() = Some(features);
 370
 371         let node_chanmgrs = create_node_chanmgrs(
 372                 6, &node_cfgs, &[None, Some(accept_forward_cfg), None, None, None, None]
 373         );
 374         let nodes = create_network(6, &node_cfgs, &node_chanmgrs);
 375
 376         create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 377         create_unannounced_chan_between_nodes_with_value(&nodes, 2, 3, 10_000_000, 1_000_000_000);
 378         create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 10_000_000, 1_000_000_000);
 379         create_announced_chan_between_nodes_with_value(&nodes, 1, 4, 10_000_000, 1_000_000_000);
 380         create_announced_chan_between_nodes_with_value(&nodes, 1, 5, 10_000_000, 1_000_000_000);
 381         create_announced_chan_between_nodes_with_value(&nodes, 2, 4, 10_000_000, 1_000_000_000);
 382         create_announced_chan_between_nodes_with_value(&nodes, 2, 5, 10_000_000, 1_000_000_000);
 383
 384         let (alice, bob, charlie, david) = (&nodes[0], &nodes[1], &nodes[2], &nodes[3]);
 385         let alice_id = alice.node.get_our_node_id();
 386         let bob_id = bob.node.get_our_node_id();
 387         let charlie_id = charlie.node.get_our_node_id();
 388         let david_id = david.node.get_our_node_id();
 389
 390         disconnect_peers(alice, &[charlie, david, &nodes[4], &nodes[5]]);
 391         disconnect_peers(david, &[bob, &nodes[4], &nodes[5]]);
 392
 393         let absolute_expiry = Duration::from_secs(u64::MAX);
 394         let payment_id = PaymentId([1; 32]);
 395         let refund = david.node
 396                 .create_refund_builder(
 397                         "refund".to_string(), 10_000_000, absolute_expiry, payment_id, Retry::Attempts(0), None
 398                 )
 399                 .unwrap()
 400                 .build().unwrap();
 401         assert_eq!(refund.amount_msats(), 10_000_000);
 402         assert_eq!(refund.absolute_expiry(), Some(absolute_expiry));
 403         assert_ne!(refund.payer_id(), david_id);
 404         assert!(!refund.paths().is_empty());
 405         for path in refund.paths() {
 406                 assert_eq!(path.introduction_node_id, charlie_id);
 407         }
 408         expect_recent_payment!(david, RecentPaymentDetails::AwaitingInvoice, payment_id);
 409
 410         alice.node.request_refund_payment(&refund).unwrap();
 411
 412         connect_peers(alice, charlie);
 413
 414         let onion_message = alice.onion_messenger.next_onion_message_for_peer(charlie_id).unwrap();
 415         charlie.onion_messenger.handle_onion_message(&alice_id, &onion_message);
 416
 417         let onion_message = charlie.onion_messenger.next_onion_message_for_peer(david_id).unwrap();
 418         david.onion_messenger.handle_onion_message(&charlie_id, &onion_message);
 419
 420         let invoice = extract_invoice(david, &onion_message);
 421         assert_eq!(invoice.amount_msats(), 10_000_000);
 422         assert_ne!(invoice.signing_pubkey(), alice_id);
 423         assert!(!invoice.payment_paths().is_empty());
 424         for (_, path) in invoice.payment_paths() {
 425                 assert_eq!(path.introduction_node_id, bob_id);
 426         }
 427
 428         route_bolt12_payment(david, &[charlie, bob, alice], &invoice);
 429         expect_recent_payment!(david, RecentPaymentDetails::Pending, payment_id);
 430
 431         claim_bolt12_payment(david, &[charlie, bob, alice]);
 432         expect_recent_payment!(david, RecentPaymentDetails::Fulfilled, payment_id);
 433 }
 434
 435 /// Checks that an offer can be paid through a one-hop blinded path and that ephemeral pubkeys are
 436 /// used rather than exposing a node's pubkey. However, the node's pubkey is still used as the
 437 /// introduction node of the blinded path.
 438 #[test]
 439 fn creates_and_pays_for_offer_using_one_hop_blinded_path() {
 440         let chanmon_cfgs = create_chanmon_cfgs(2);
 441         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 442         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 443         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 444
 445         create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 446
 447         let alice = &nodes[0];
 448         let alice_id = alice.node.get_our_node_id();
 449         let bob = &nodes[1];
 450         let bob_id = bob.node.get_our_node_id();
 451
 452         let offer = alice.node
 453                 .create_offer_builder("coffee".to_string()).unwrap()
 454                 .amount_msats(10_000_000)
 455                 .build().unwrap();
 456         assert_ne!(offer.signing_pubkey(), alice_id);
 457         assert!(!offer.paths().is_empty());
 458         for path in offer.paths() {
 459                 assert_eq!(path.introduction_node_id, alice_id);
 460         }
 461
 462         let payment_id = PaymentId([1; 32]);
 463         bob.node.pay_for_offer(&offer, None, None, None, payment_id, Retry::Attempts(0), None).unwrap();
 464         expect_recent_payment!(bob, RecentPaymentDetails::AwaitingInvoice, payment_id);
 465
 466         let onion_message = bob.onion_messenger.next_onion_message_for_peer(alice_id).unwrap();
 467         alice.onion_messenger.handle_onion_message(&bob_id, &onion_message);
 468
 469         let (invoice_request, reply_path) = extract_invoice_request(alice, &onion_message);
 470         assert_eq!(invoice_request.amount_msats(), None);
 471         assert_ne!(invoice_request.payer_id(), bob_id);
 472         assert_eq!(reply_path.unwrap().introduction_node_id, bob_id);
 473
 474         let onion_message = alice.onion_messenger.next_onion_message_for_peer(bob_id).unwrap();
 475         bob.onion_messenger.handle_onion_message(&alice_id, &onion_message);
 476
 477         let invoice = extract_invoice(bob, &onion_message);
 478         assert_eq!(invoice.amount_msats(), 10_000_000);
 479         assert_ne!(invoice.signing_pubkey(), alice_id);
 480         assert!(!invoice.payment_paths().is_empty());
 481         for (_, path) in invoice.payment_paths() {
 482                 assert_eq!(path.introduction_node_id, alice_id);
 483         }
 484
 485         route_bolt12_payment(bob, &[alice], &invoice);
 486         expect_recent_payment!(bob, RecentPaymentDetails::Pending, payment_id);
 487
 488         claim_bolt12_payment(bob, &[alice]);
 489         expect_recent_payment!(bob, RecentPaymentDetails::Fulfilled, payment_id);
 490 }
 491
 492 /// Checks that a refund can be paid through a one-hop blinded path and that ephemeral pubkeys are
 493 /// used rather than exposing a node's pubkey. However, the node's pubkey is still used as the
 494 /// introduction node of the blinded path.
 495 #[test]
 496 fn creates_and_pays_for_refund_using_one_hop_blinded_path() {
 497         let chanmon_cfgs = create_chanmon_cfgs(2);
 498         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 499         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 500         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 501
 502         create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 503
 504         let alice = &nodes[0];
 505         let alice_id = alice.node.get_our_node_id();
 506         let bob = &nodes[1];
 507         let bob_id = bob.node.get_our_node_id();
 508
 509         let absolute_expiry = Duration::from_secs(u64::MAX);
 510         let payment_id = PaymentId([1; 32]);
 511         let refund = bob.node
 512                 .create_refund_builder(
 513                         "refund".to_string(), 10_000_000, absolute_expiry, payment_id, Retry::Attempts(0), None
 514                 )
 515                 .unwrap()
 516                 .build().unwrap();
 517         assert_eq!(refund.amount_msats(), 10_000_000);
 518         assert_eq!(refund.absolute_expiry(), Some(absolute_expiry));
 519         assert_ne!(refund.payer_id(), bob_id);
 520         assert!(!refund.paths().is_empty());
 521         for path in refund.paths() {
 522                 assert_eq!(path.introduction_node_id, bob_id);
 523         }
 524         expect_recent_payment!(bob, RecentPaymentDetails::AwaitingInvoice, payment_id);
 525
 526         alice.node.request_refund_payment(&refund).unwrap();
 527
 528         let onion_message = alice.onion_messenger.next_onion_message_for_peer(bob_id).unwrap();
 529         bob.onion_messenger.handle_onion_message(&alice_id, &onion_message);
 530
 531         let invoice = extract_invoice(bob, &onion_message);
 532         assert_eq!(invoice.amount_msats(), 10_000_000);
 533         assert_ne!(invoice.signing_pubkey(), alice_id);
 534         assert!(!invoice.payment_paths().is_empty());
 535         for (_, path) in invoice.payment_paths() {
 536                 assert_eq!(path.introduction_node_id, alice_id);
 537         }
 538
 539         route_bolt12_payment(bob, &[alice], &invoice);
 540         expect_recent_payment!(bob, RecentPaymentDetails::Pending, payment_id);
 541
 542         claim_bolt12_payment(bob, &[alice]);
 543         expect_recent_payment!(bob, RecentPaymentDetails::Fulfilled, payment_id);
 544 }
 545
 546 /// Checks that an invoice for an offer without any blinded paths can be requested. Note that while
 547 /// the requested is sent directly using the node's pubkey, the response and the payment still use
 548 /// blinded paths as required by the spec.
 549 #[test]
 550 fn pays_for_offer_without_blinded_paths() {
 551         let chanmon_cfgs = create_chanmon_cfgs(2);
 552         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 553         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 554         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 555
 556         create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 557
 558         let alice = &nodes[0];
 559         let alice_id = alice.node.get_our_node_id();
 560         let bob = &nodes[1];
 561         let bob_id = bob.node.get_our_node_id();
 562
 563         let offer = alice.node
 564                 .create_offer_builder("coffee".to_string()).unwrap()
 565                 .clear_paths()
 566                 .amount_msats(10_000_000)
 567                 .build().unwrap();
 568         assert_eq!(offer.signing_pubkey(), alice_id);
 569         assert!(offer.paths().is_empty());
 570
 571         let payment_id = PaymentId([1; 32]);
 572         bob.node.pay_for_offer(&offer, None, None, None, payment_id, Retry::Attempts(0), None).unwrap();
 573         expect_recent_payment!(bob, RecentPaymentDetails::AwaitingInvoice, payment_id);
 574
 575         let onion_message = bob.onion_messenger.next_onion_message_for_peer(alice_id).unwrap();
 576         alice.onion_messenger.handle_onion_message(&bob_id, &onion_message);
 577
 578         let onion_message = alice.onion_messenger.next_onion_message_for_peer(bob_id).unwrap();
 579         bob.onion_messenger.handle_onion_message(&alice_id, &onion_message);
 580
 581         let invoice = extract_invoice(bob, &onion_message);
 582         route_bolt12_payment(bob, &[alice], &invoice);
 583         expect_recent_payment!(bob, RecentPaymentDetails::Pending, payment_id);
 584
 585         claim_bolt12_payment(bob, &[alice]);
 586         expect_recent_payment!(bob, RecentPaymentDetails::Fulfilled, payment_id);
 587 }
 588
 589 /// Checks that a refund without any blinded paths can be paid. Note that while the invoice is sent
 590 /// directly using the node's pubkey, the payment still use blinded paths as required by the spec.
 591 #[test]
 592 fn pays_for_refund_without_blinded_paths() {
 593         let chanmon_cfgs = create_chanmon_cfgs(2);
 594         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 595         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 596         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 597
 598         create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 599
 600         let alice = &nodes[0];
 601         let alice_id = alice.node.get_our_node_id();
 602         let bob = &nodes[1];
 603         let bob_id = bob.node.get_our_node_id();
 604
 605         let absolute_expiry = Duration::from_secs(u64::MAX);
 606         let payment_id = PaymentId([1; 32]);
 607         let refund = bob.node
 608                 .create_refund_builder(
 609                         "refund".to_string(), 10_000_000, absolute_expiry, payment_id, Retry::Attempts(0), None
 610                 )
 611                 .unwrap()
 612                 .clear_paths()
 613                 .build().unwrap();
 614         assert_eq!(refund.payer_id(), bob_id);
 615         assert!(refund.paths().is_empty());
 616         expect_recent_payment!(bob, RecentPaymentDetails::AwaitingInvoice, payment_id);
 617
 618         alice.node.request_refund_payment(&refund).unwrap();
 619
 620         let onion_message = alice.onion_messenger.next_onion_message_for_peer(bob_id).unwrap();
 621         bob.onion_messenger.handle_onion_message(&alice_id, &onion_message);
 622
 623         let invoice = extract_invoice(bob, &onion_message);
 624         route_bolt12_payment(bob, &[alice], &invoice);
 625         expect_recent_payment!(bob, RecentPaymentDetails::Pending, payment_id);
 626
 627         claim_bolt12_payment(bob, &[alice]);
 628         expect_recent_payment!(bob, RecentPaymentDetails::Fulfilled, payment_id);
 629 }
 630
 631 /// Fails creating an offer when a blinded path cannot be created without exposing the node's id.
 632 #[test]
 633 fn fails_creating_offer_without_blinded_paths() {
 634         let chanmon_cfgs = create_chanmon_cfgs(2);
 635         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 636         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 637         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 638
 639         create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 640
 641         match nodes[0].node.create_offer_builder("coffee".to_string()) {
 642                 Ok(_) => panic!("Expected error"),
 643                 Err(e) => assert_eq!(e, Bolt12SemanticError::MissingPaths),
 644         }
 645 }
 646
 647 /// Fails creating a refund when a blinded path cannot be created without exposing the node's id.
 648 #[test]
 649 fn fails_creating_refund_without_blinded_paths() {
 650         let chanmon_cfgs = create_chanmon_cfgs(2);
 651         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 652         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 653         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 654
 655         create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 656
 657         let absolute_expiry = Duration::from_secs(u64::MAX);
 658         let payment_id = PaymentId([1; 32]);
 659
 660         match nodes[0].node.create_refund_builder(
 661                 "refund".to_string(), 10_000, absolute_expiry, payment_id, Retry::Attempts(0), None
 662         ) {
 663                 Ok(_) => panic!("Expected error"),
 664                 Err(e) => assert_eq!(e, Bolt12SemanticError::MissingPaths),
 665         }
 666
 667         assert!(nodes[0].node.list_recent_payments().is_empty());
 668 }
 669
 670 /// Fails creating an invoice request when a blinded reply path cannot be created without exposing
 671 /// the node's id.
 672 #[test]
 673 fn fails_creating_invoice_request_without_blinded_reply_path() {
 674         let chanmon_cfgs = create_chanmon_cfgs(6);
 675         let node_cfgs = create_node_cfgs(6, &chanmon_cfgs);
 676         let node_chanmgrs = create_node_chanmgrs(6, &node_cfgs, &[None, None, None, None, None, None]);
 677         let nodes = create_network(6, &node_cfgs, &node_chanmgrs);
 678
 679         create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 680         create_unannounced_chan_between_nodes_with_value(&nodes, 2, 3, 10_000_000, 1_000_000_000);
 681         create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 10_000_000, 1_000_000_000);
 682         create_announced_chan_between_nodes_with_value(&nodes, 1, 4, 10_000_000, 1_000_000_000);
 683         create_announced_chan_between_nodes_with_value(&nodes, 1, 5, 10_000_000, 1_000_000_000);
 684
 685         let (alice, bob, charlie, david) = (&nodes[0], &nodes[1], &nodes[2], &nodes[3]);
 686
 687         disconnect_peers(alice, &[charlie, david, &nodes[4], &nodes[5]]);
 688         disconnect_peers(david, &[bob, &nodes[4], &nodes[5]]);
 689
 690         let offer = alice.node
 691                 .create_offer_builder("coffee".to_string()).unwrap()
 692                 .amount_msats(10_000_000)
 693                 .build().unwrap();
 694
 695         let payment_id = PaymentId([1; 32]);
 696
 697         match david.node.pay_for_offer(&offer, None, None, None, payment_id, Retry::Attempts(0), None) {
 698                 Ok(_) => panic!("Expected error"),
 699                 Err(e) => assert_eq!(e, Bolt12SemanticError::MissingPaths),
 700         }
 701
 702         assert!(nodes[0].node.list_recent_payments().is_empty());
 703 }
 704
 705 #[test]
 706 fn fails_creating_invoice_request_with_duplicate_payment_id() {
 707         let chanmon_cfgs = create_chanmon_cfgs(6);
 708         let node_cfgs = create_node_cfgs(6, &chanmon_cfgs);
 709         let node_chanmgrs = create_node_chanmgrs(6, &node_cfgs, &[None, None, None, None, None, None]);
 710         let nodes = create_network(6, &node_cfgs, &node_chanmgrs);
 711
 712         create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 713         create_unannounced_chan_between_nodes_with_value(&nodes, 2, 3, 10_000_000, 1_000_000_000);
 714         create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 10_000_000, 1_000_000_000);
 715         create_announced_chan_between_nodes_with_value(&nodes, 1, 4, 10_000_000, 1_000_000_000);
 716         create_announced_chan_between_nodes_with_value(&nodes, 1, 5, 10_000_000, 1_000_000_000);
 717         create_announced_chan_between_nodes_with_value(&nodes, 2, 4, 10_000_000, 1_000_000_000);
 718         create_announced_chan_between_nodes_with_value(&nodes, 2, 5, 10_000_000, 1_000_000_000);
 719
 720         let (alice, _bob, charlie, david) = (&nodes[0], &nodes[1], &nodes[2], &nodes[3]);
 721
 722         disconnect_peers(alice, &[charlie, david, &nodes[4], &nodes[5]]);
 723
 724         let offer = alice.node
 725                 .create_offer_builder("coffee".to_string()).unwrap()
 726                 .amount_msats(10_000_000)
 727                 .build().unwrap();
 728
 729         let payment_id = PaymentId([1; 32]);
 730         assert!(
 731                 david.node.pay_for_offer(
 732                         &offer, None, None, None, payment_id, Retry::Attempts(0), None
 733                 ).is_ok()
 734         );
 735         expect_recent_payment!(david, RecentPaymentDetails::AwaitingInvoice, payment_id);
 736
 737         match david.node.pay_for_offer(&offer, None, None, None, payment_id, Retry::Attempts(0), None) {
 738                 Ok(_) => panic!("Expected error"),
 739                 Err(e) => assert_eq!(e, Bolt12SemanticError::DuplicatePaymentId),
 740         }
 741
 742         expect_recent_payment!(david, RecentPaymentDetails::AwaitingInvoice, payment_id);
 743 }
 744
 745 #[test]
 746 fn fails_creating_refund_with_duplicate_payment_id() {
 747         let chanmon_cfgs = create_chanmon_cfgs(2);
 748         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 749         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 750         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 751
 752         create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 753
 754         let absolute_expiry = Duration::from_secs(u64::MAX);
 755         let payment_id = PaymentId([1; 32]);
 756         assert!(
 757                 nodes[0].node.create_refund_builder(
 758                         "refund".to_string(), 10_000, absolute_expiry, payment_id, Retry::Attempts(0), None
 759                 ).is_ok()
 760         );
 761         expect_recent_payment!(nodes[0], RecentPaymentDetails::AwaitingInvoice, payment_id);
 762
 763         match nodes[0].node.create_refund_builder(
 764                 "refund".to_string(), 10_000, absolute_expiry, payment_id, Retry::Attempts(0), None
 765         ) {
 766                 Ok(_) => panic!("Expected error"),
 767                 Err(e) => assert_eq!(e, Bolt12SemanticError::DuplicatePaymentId),
 768         }
 769
 770         expect_recent_payment!(nodes[0], RecentPaymentDetails::AwaitingInvoice, payment_id);
 771 }
 772
 773 #[test]
 774 fn fails_sending_invoice_without_blinded_payment_paths_for_offer() {
 775         let mut accept_forward_cfg = test_default_channel_config();
 776         accept_forward_cfg.accept_forwards_to_priv_channels = true;
 777
 778         // Clearing route_blinding prevents forming any payment paths since the node is unannounced.
 779         let mut features = channelmanager::provided_init_features(&accept_forward_cfg);
 780         features.set_onion_messages_optional();
 781         features.clear_route_blinding();
 782
 783         let chanmon_cfgs = create_chanmon_cfgs(6);
 784         let node_cfgs = create_node_cfgs(6, &chanmon_cfgs);
 785
 786         *node_cfgs[1].override_init_features.borrow_mut() = Some(features);
 787
 788         let node_chanmgrs = create_node_chanmgrs(
 789                 6, &node_cfgs, &[None, Some(accept_forward_cfg), None, None, None, None]
 790         );
 791         let nodes = create_network(6, &node_cfgs, &node_chanmgrs);
 792
 793         create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 794         create_unannounced_chan_between_nodes_with_value(&nodes, 2, 3, 10_000_000, 1_000_000_000);
 795         create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 10_000_000, 1_000_000_000);
 796         create_announced_chan_between_nodes_with_value(&nodes, 1, 4, 10_000_000, 1_000_000_000);
 797         create_announced_chan_between_nodes_with_value(&nodes, 1, 5, 10_000_000, 1_000_000_000);
 798         create_announced_chan_between_nodes_with_value(&nodes, 2, 4, 10_000_000, 1_000_000_000);
 799         create_announced_chan_between_nodes_with_value(&nodes, 2, 5, 10_000_000, 1_000_000_000);
 800
 801         let (alice, bob, charlie, david) = (&nodes[0], &nodes[1], &nodes[2], &nodes[3]);
 802         let alice_id = alice.node.get_our_node_id();
 803         let bob_id = bob.node.get_our_node_id();
 804         let charlie_id = charlie.node.get_our_node_id();
 805         let david_id = david.node.get_our_node_id();
 806
 807         disconnect_peers(alice, &[charlie, david, &nodes[4], &nodes[5]]);
 808         disconnect_peers(david, &[bob, &nodes[4], &nodes[5]]);
 809
 810         let offer = alice.node
 811                 .create_offer_builder("coffee".to_string()).unwrap()
 812                 .amount_msats(10_000_000)
 813                 .build().unwrap();
 814
 815         let payment_id = PaymentId([1; 32]);
 816         david.node.pay_for_offer(&offer, None, None, None, payment_id, Retry::Attempts(0), None)
 817                 .unwrap();
 818
 819         connect_peers(david, bob);
 820
 821         let onion_message = david.onion_messenger.next_onion_message_for_peer(bob_id).unwrap();
 822         bob.onion_messenger.handle_onion_message(&david_id, &onion_message);
 823
 824         connect_peers(alice, charlie);
 825
 826         let onion_message = bob.onion_messenger.next_onion_message_for_peer(alice_id).unwrap();
 827         alice.onion_messenger.handle_onion_message(&bob_id, &onion_message);
 828
 829         let onion_message = alice.onion_messenger.next_onion_message_for_peer(charlie_id).unwrap();
 830         charlie.onion_messenger.handle_onion_message(&alice_id, &onion_message);
 831
 832         let onion_message = charlie.onion_messenger.next_onion_message_for_peer(david_id).unwrap();
 833         david.onion_messenger.handle_onion_message(&charlie_id, &onion_message);
 834
 835         let invoice_error = extract_invoice_error(david, &onion_message);
 836         assert_eq!(invoice_error, InvoiceError::from(Bolt12SemanticError::MissingPaths));
 837 }
 838
 839 #[test]
 840 fn fails_sending_invoice_without_blinded_payment_paths_for_refund() {
 841         let mut accept_forward_cfg = test_default_channel_config();
 842         accept_forward_cfg.accept_forwards_to_priv_channels = true;
 843
 844         // Clearing route_blinding prevents forming any payment paths since the node is unannounced.
 845         let mut features = channelmanager::provided_init_features(&accept_forward_cfg);
 846         features.set_onion_messages_optional();
 847         features.clear_route_blinding();
 848
 849         let chanmon_cfgs = create_chanmon_cfgs(6);
 850         let node_cfgs = create_node_cfgs(6, &chanmon_cfgs);
 851
 852         *node_cfgs[1].override_init_features.borrow_mut() = Some(features);
 853
 854         let node_chanmgrs = create_node_chanmgrs(
 855                 6, &node_cfgs, &[None, Some(accept_forward_cfg), None, None, None, None]
 856         );
 857         let nodes = create_network(6, &node_cfgs, &node_chanmgrs);
 858
 859         create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 860         create_unannounced_chan_between_nodes_with_value(&nodes, 2, 3, 10_000_000, 1_000_000_000);
 861         create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 10_000_000, 1_000_000_000);
 862         create_announced_chan_between_nodes_with_value(&nodes, 1, 4, 10_000_000, 1_000_000_000);
 863         create_announced_chan_between_nodes_with_value(&nodes, 1, 5, 10_000_000, 1_000_000_000);
 864         create_announced_chan_between_nodes_with_value(&nodes, 2, 4, 10_000_000, 1_000_000_000);
 865         create_announced_chan_between_nodes_with_value(&nodes, 2, 5, 10_000_000, 1_000_000_000);
 866
 867         let (alice, bob, charlie, david) = (&nodes[0], &nodes[1], &nodes[2], &nodes[3]);
 868
 869         disconnect_peers(alice, &[charlie, david, &nodes[4], &nodes[5]]);
 870         disconnect_peers(david, &[bob, &nodes[4], &nodes[5]]);
 871
 872         let absolute_expiry = Duration::from_secs(u64::MAX);
 873         let payment_id = PaymentId([1; 32]);
 874         let refund = david.node
 875                 .create_refund_builder(
 876                         "refund".to_string(), 10_000_000, absolute_expiry, payment_id, Retry::Attempts(0), None
 877                 )
 878                 .unwrap()
 879                 .build().unwrap();
 880
 881         match alice.node.request_refund_payment(&refund) {
 882                 Ok(_) => panic!("Expected error"),
 883                 Err(e) => assert_eq!(e, Bolt12SemanticError::MissingPaths),
 884         }
 885 }
 886
 887 #[test]
 888 fn fails_paying_invoice_more_than_once() {
 889         let mut accept_forward_cfg = test_default_channel_config();
 890         accept_forward_cfg.accept_forwards_to_priv_channels = true;
 891
 892         let mut features = channelmanager::provided_init_features(&accept_forward_cfg);
 893         features.set_onion_messages_optional();
 894         features.set_route_blinding_optional();
 895
 896         let chanmon_cfgs = create_chanmon_cfgs(6);
 897         let node_cfgs = create_node_cfgs(6, &chanmon_cfgs);
 898
 899         *node_cfgs[1].override_init_features.borrow_mut() = Some(features);
 900
 901         let node_chanmgrs = create_node_chanmgrs(
 902                 6, &node_cfgs, &[None, Some(accept_forward_cfg), None, None, None, None]
 903         );
 904         let nodes = create_network(6, &node_cfgs, &node_chanmgrs);
 905
 906         create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
 907         create_unannounced_chan_between_nodes_with_value(&nodes, 2, 3, 10_000_000, 1_000_000_000);
 908         create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 10_000_000, 1_000_000_000);
 909         create_announced_chan_between_nodes_with_value(&nodes, 1, 4, 10_000_000, 1_000_000_000);
 910         create_announced_chan_between_nodes_with_value(&nodes, 1, 5, 10_000_000, 1_000_000_000);
 911         create_announced_chan_between_nodes_with_value(&nodes, 2, 4, 10_000_000, 1_000_000_000);
 912         create_announced_chan_between_nodes_with_value(&nodes, 2, 5, 10_000_000, 1_000_000_000);
 913
 914         let (alice, bob, charlie, david) = (&nodes[0], &nodes[1], &nodes[2], &nodes[3]);
 915         let alice_id = alice.node.get_our_node_id();
 916         let bob_id = bob.node.get_our_node_id();
 917         let charlie_id = charlie.node.get_our_node_id();
 918         let david_id = david.node.get_our_node_id();
 919
 920         disconnect_peers(alice, &[charlie, david, &nodes[4], &nodes[5]]);
 921         disconnect_peers(david, &[bob, &nodes[4], &nodes[5]]);
 922
 923         let absolute_expiry = Duration::from_secs(u64::MAX);
 924         let payment_id = PaymentId([1; 32]);
 925         let refund = david.node
 926                 .create_refund_builder(
 927                         "refund".to_string(), 10_000_000, absolute_expiry, payment_id, Retry::Attempts(0), None
 928                 )
 929                 .unwrap()
 930                 .build().unwrap();
 931         expect_recent_payment!(david, RecentPaymentDetails::AwaitingInvoice, payment_id);
 932
 933         // Alice sends the first invoice
 934         alice.node.request_refund_payment(&refund).unwrap();
 935
 936         connect_peers(alice, charlie);
 937
 938         let onion_message = alice.onion_messenger.next_onion_message_for_peer(charlie_id).unwrap();
 939         charlie.onion_messenger.handle_onion_message(&alice_id, &onion_message);
 940
 941         let onion_message = charlie.onion_messenger.next_onion_message_for_peer(david_id).unwrap();
 942         david.onion_messenger.handle_onion_message(&charlie_id, &onion_message);
 943
 944         // David pays the first invoice
 945         let invoice1 = extract_invoice(david, &onion_message);
 946
 947         route_bolt12_payment(david, &[charlie, bob, alice], &invoice1);
 948         expect_recent_payment!(david, RecentPaymentDetails::Pending, payment_id);
 949
 950         claim_bolt12_payment(david, &[charlie, bob, alice]);
 951         expect_recent_payment!(david, RecentPaymentDetails::Fulfilled, payment_id);
 952
 953         disconnect_peers(alice, &[charlie]);
 954
 955         // Alice sends the second invoice
 956         alice.node.request_refund_payment(&refund).unwrap();
 957
 958         connect_peers(alice, charlie);
 959         connect_peers(david, bob);
 960
 961         let onion_message = alice.onion_messenger.next_onion_message_for_peer(charlie_id).unwrap();
 962         charlie.onion_messenger.handle_onion_message(&alice_id, &onion_message);
 963
 964         let onion_message = charlie.onion_messenger.next_onion_message_for_peer(david_id).unwrap();
 965         david.onion_messenger.handle_onion_message(&charlie_id, &onion_message);
 966
 967         let invoice2 = extract_invoice(david, &onion_message);
 968         assert_eq!(invoice1.payer_metadata(), invoice2.payer_metadata());
 969
 970         // David sends an error instead of paying the second invoice
 971         let onion_message = david.onion_messenger.next_onion_message_for_peer(bob_id).unwrap();
 972         bob.onion_messenger.handle_onion_message(&david_id, &onion_message);
 973
 974         let onion_message = bob.onion_messenger.next_onion_message_for_peer(alice_id).unwrap();
 975         alice.onion_messenger.handle_onion_message(&bob_id, &onion_message);
 976
 977         let invoice_error = extract_invoice_error(alice, &onion_message);
 978         assert_eq!(invoice_error, InvoiceError::from_string("DuplicateInvoice".to_string()));
 979 }