1 //! Convenient utilities to create an invoice.
3 use crate::{Bolt11Invoice, CreationError, Currency, InvoiceBuilder, SignOrCreationError};
5 use crate::{prelude::*, Description, Bolt11InvoiceDescription, Sha256};
7 use bitcoin_hashes::Hash;
9 use lightning::chain::chaininterface::{BroadcasterInterface, FeeEstimator};
10 use lightning::sign::{Recipient, NodeSigner, SignerProvider, EntropySource};
11 use lightning::ln::{PaymentHash, PaymentSecret};
12 use lightning::ln::channelmanager::{ChannelDetails, ChannelManager, MIN_FINAL_CLTV_EXPIRY_DELTA};
13 use lightning::ln::channelmanager::{PhantomRouteHints, MIN_CLTV_EXPIRY_DELTA};
14 use lightning::ln::inbound_payment::{create, create_from_hash, ExpandedKey};
15 use lightning::routing::gossip::RoutingFees;
16 use lightning::routing::router::{RouteHint, RouteHintHop, Router};
17 use lightning::util::logger::Logger;
18 use secp256k1::PublicKey;
20 use core::time::Duration;
21 use core::iter::Iterator;
23 /// Utility to create an invoice that can be paid to one of multiple nodes, or a "phantom invoice."
24 /// See [`PhantomKeysManager`] for more information on phantom node payments.
26 /// `phantom_route_hints` parameter:
27 /// * Contains channel info for all nodes participating in the phantom invoice
28 /// * Entries are retrieved from a call to [`ChannelManager::get_phantom_route_hints`] on each
29 /// participating node
30 /// * It is fine to cache `phantom_route_hints` and reuse it across invoices, as long as the data is
31 /// updated when a channel becomes disabled or closes
32 /// * Note that if too many channels are included in [`PhantomRouteHints::channels`], the invoice
33 /// may be too long for QR code scanning. To fix this, `PhantomRouteHints::channels` may be pared
36 /// `payment_hash` can be specified if you have a specific need for a custom payment hash (see the difference
37 /// between [`ChannelManager::create_inbound_payment`] and [`ChannelManager::create_inbound_payment_for_hash`]).
38 /// If `None` is provided for `payment_hash`, then one will be created.
40 /// `invoice_expiry_delta_secs` describes the number of seconds that the invoice is valid for
41 /// in excess of the current time.
43 /// `duration_since_epoch` is the current time since epoch in seconds.
45 /// You can specify a custom `min_final_cltv_expiry_delta`, or let LDK default it to
46 /// [`MIN_FINAL_CLTV_EXPIRY_DELTA`]. The provided expiry must be at least [`MIN_FINAL_CLTV_EXPIRY_DELTA`] - 3.
47 /// Note that LDK will add a buffer of 3 blocks to the delta to allow for up to a few new block
48 /// confirmations during routing.
50 /// Note that the provided `keys_manager`'s `NodeSigner` implementation must support phantom
51 /// invoices in its `sign_invoice` implementation ([`PhantomKeysManager`] satisfies this
54 /// [`PhantomKeysManager`]: lightning::sign::PhantomKeysManager
55 /// [`ChannelManager::get_phantom_route_hints`]: lightning::ln::channelmanager::ChannelManager::get_phantom_route_hints
56 /// [`ChannelManager::create_inbound_payment`]: lightning::ln::channelmanager::ChannelManager::create_inbound_payment
57 /// [`ChannelManager::create_inbound_payment_for_hash`]: lightning::ln::channelmanager::ChannelManager::create_inbound_payment_for_hash
58 /// [`PhantomRouteHints::channels`]: lightning::ln::channelmanager::PhantomRouteHints::channels
59 /// [`MIN_FINAL_CLTV_EXPIRY_DETLA`]: lightning::ln::channelmanager::MIN_FINAL_CLTV_EXPIRY_DELTA
61 /// This can be used in a `no_std` environment, where [`std::time::SystemTime`] is not
62 /// available and the current time is supplied by the caller.
63 pub fn create_phantom_invoice<ES: Deref, NS: Deref, L: Deref>(
64 amt_msat: Option<u64>, payment_hash: Option<PaymentHash>, description: String,
65 invoice_expiry_delta_secs: u32, phantom_route_hints: Vec<PhantomRouteHints>, entropy_source: ES,
66 node_signer: NS, logger: L, network: Currency, min_final_cltv_expiry_delta: Option<u16>, duration_since_epoch: Duration,
67 ) -> Result<Bolt11Invoice, SignOrCreationError<()>>
69 ES::Target: EntropySource,
70 NS::Target: NodeSigner,
73 let description = Description::new(description).map_err(SignOrCreationError::CreationError)?;
74 let description = Bolt11InvoiceDescription::Direct(&description,);
75 _create_phantom_invoice::<ES, NS, L>(
76 amt_msat, payment_hash, description, invoice_expiry_delta_secs, phantom_route_hints,
77 entropy_source, node_signer, logger, network, min_final_cltv_expiry_delta, duration_since_epoch,
81 /// Utility to create an invoice that can be paid to one of multiple nodes, or a "phantom invoice."
82 /// See [`PhantomKeysManager`] for more information on phantom node payments.
84 /// `phantom_route_hints` parameter:
85 /// * Contains channel info for all nodes participating in the phantom invoice
86 /// * Entries are retrieved from a call to [`ChannelManager::get_phantom_route_hints`] on each
87 /// participating node
88 /// * It is fine to cache `phantom_route_hints` and reuse it across invoices, as long as the data is
89 /// updated when a channel becomes disabled or closes
90 /// * Note that the route hints generated from `phantom_route_hints` will be limited to a maximum
91 /// of 3 hints to ensure that the invoice can be scanned in a QR code. These hints are selected
92 /// in the order that the nodes in `PhantomRouteHints` are specified, selecting one hint per node
93 /// until the maximum is hit. Callers may provide as many `PhantomRouteHints::channels` as
94 /// desired, but note that some nodes will be trimmed if more than 3 nodes are provided.
96 /// `description_hash` is a SHA-256 hash of the description text
98 /// `payment_hash` can be specified if you have a specific need for a custom payment hash (see the difference
99 /// between [`ChannelManager::create_inbound_payment`] and [`ChannelManager::create_inbound_payment_for_hash`]).
100 /// If `None` is provided for `payment_hash`, then one will be created.
102 /// `invoice_expiry_delta_secs` describes the number of seconds that the invoice is valid for
103 /// in excess of the current time.
105 /// `duration_since_epoch` is the current time since epoch in seconds.
107 /// Note that the provided `keys_manager`'s `NodeSigner` implementation must support phantom
108 /// invoices in its `sign_invoice` implementation ([`PhantomKeysManager`] satisfies this
111 /// [`PhantomKeysManager`]: lightning::sign::PhantomKeysManager
112 /// [`ChannelManager::get_phantom_route_hints`]: lightning::ln::channelmanager::ChannelManager::get_phantom_route_hints
113 /// [`ChannelManager::create_inbound_payment`]: lightning::ln::channelmanager::ChannelManager::create_inbound_payment
114 /// [`ChannelManager::create_inbound_payment_for_hash`]: lightning::ln::channelmanager::ChannelManager::create_inbound_payment_for_hash
115 /// [`PhantomRouteHints::channels`]: lightning::ln::channelmanager::PhantomRouteHints::channels
117 /// This can be used in a `no_std` environment, where [`std::time::SystemTime`] is not
118 /// available and the current time is supplied by the caller.
119 pub fn create_phantom_invoice_with_description_hash<ES: Deref, NS: Deref, L: Deref>(
120 amt_msat: Option<u64>, payment_hash: Option<PaymentHash>, invoice_expiry_delta_secs: u32,
121 description_hash: Sha256, phantom_route_hints: Vec<PhantomRouteHints>, entropy_source: ES,
122 node_signer: NS, logger: L, network: Currency, min_final_cltv_expiry_delta: Option<u16>, duration_since_epoch: Duration,
123 ) -> Result<Bolt11Invoice, SignOrCreationError<()>>
125 ES::Target: EntropySource,
126 NS::Target: NodeSigner,
129 _create_phantom_invoice::<ES, NS, L>(
130 amt_msat, payment_hash, Bolt11InvoiceDescription::Hash(&description_hash),
131 invoice_expiry_delta_secs, phantom_route_hints, entropy_source, node_signer, logger, network,
132 min_final_cltv_expiry_delta, duration_since_epoch,
136 const MAX_CHANNEL_HINTS: usize = 3;
138 fn _create_phantom_invoice<ES: Deref, NS: Deref, L: Deref>(
139 amt_msat: Option<u64>, payment_hash: Option<PaymentHash>, description: Bolt11InvoiceDescription,
140 invoice_expiry_delta_secs: u32, phantom_route_hints: Vec<PhantomRouteHints>, entropy_source: ES,
141 node_signer: NS, logger: L, network: Currency, min_final_cltv_expiry_delta: Option<u16>, duration_since_epoch: Duration,
142 ) -> Result<Bolt11Invoice, SignOrCreationError<()>>
144 ES::Target: EntropySource,
145 NS::Target: NodeSigner,
149 if phantom_route_hints.is_empty() {
150 return Err(SignOrCreationError::CreationError(
151 CreationError::MissingRouteHints,
155 if min_final_cltv_expiry_delta.is_some() && min_final_cltv_expiry_delta.unwrap().saturating_add(3) < MIN_FINAL_CLTV_EXPIRY_DELTA {
156 return Err(SignOrCreationError::CreationError(CreationError::MinFinalCltvExpiryDeltaTooShort));
159 let invoice = match description {
160 Bolt11InvoiceDescription::Direct(description) => {
161 InvoiceBuilder::new(network).description(description.0.clone())
163 Bolt11InvoiceDescription::Hash(hash) => InvoiceBuilder::new(network).description_hash(hash.0),
166 // If we ever see performance here being too slow then we should probably take this ExpandedKey as a parameter instead.
167 let keys = ExpandedKey::new(&node_signer.get_inbound_payment_key_material());
168 let (payment_hash, payment_secret) = if let Some(payment_hash) = payment_hash {
169 let payment_secret = create_from_hash(
173 invoice_expiry_delta_secs,
176 min_final_cltv_expiry_delta,
178 .map_err(|_| SignOrCreationError::CreationError(CreationError::InvalidAmount))?;
179 (payment_hash, payment_secret)
184 invoice_expiry_delta_secs,
188 min_final_cltv_expiry_delta,
190 .map_err(|_| SignOrCreationError::CreationError(CreationError::InvalidAmount))?
193 log_trace!(logger, "Creating phantom invoice from {} participating nodes with payment hash {}",
194 phantom_route_hints.len(), &payment_hash);
196 let mut invoice = invoice
197 .duration_since_epoch(duration_since_epoch)
198 .payment_hash(Hash::from_slice(&payment_hash.0).unwrap())
199 .payment_secret(payment_secret)
200 .min_final_cltv_expiry_delta(
201 // Add a buffer of 3 to the delta if present, otherwise use LDK's minimum.
202 min_final_cltv_expiry_delta.map(|x| x.saturating_add(3)).unwrap_or(MIN_FINAL_CLTV_EXPIRY_DELTA).into())
203 .expiry_time(Duration::from_secs(invoice_expiry_delta_secs.into()));
204 if let Some(amt) = amt_msat {
205 invoice = invoice.amount_milli_satoshis(amt);
209 for route_hint in select_phantom_hints(amt_msat, phantom_route_hints, logger).take(MAX_CHANNEL_HINTS) {
210 invoice = invoice.private_route(route_hint);
213 let raw_invoice = match invoice.build_raw() {
215 Err(e) => return Err(SignOrCreationError::CreationError(e))
217 let hrp_str = raw_invoice.hrp.to_string();
218 let hrp_bytes = hrp_str.as_bytes();
219 let data_without_signature = raw_invoice.data.to_base32();
220 let signed_raw_invoice = raw_invoice.sign(|_| node_signer.sign_invoice(hrp_bytes, &data_without_signature, Recipient::PhantomNode));
221 match signed_raw_invoice {
222 Ok(inv) => Ok(Bolt11Invoice::from_signed(inv).unwrap()),
223 Err(e) => Err(SignOrCreationError::SignError(e))
227 /// Utility to select route hints for phantom invoices.
228 /// See [`PhantomKeysManager`] for more information on phantom node payments.
230 /// To ensure that the phantom invoice is still readable by QR code, we limit to 3 hints per invoice:
231 /// * Select up to three channels per node.
232 /// * Select one hint from each node, up to three hints or until we run out of hints.
234 /// [`PhantomKeysManager`]: lightning::sign::PhantomKeysManager
235 fn select_phantom_hints<L: Deref>(amt_msat: Option<u64>, phantom_route_hints: Vec<PhantomRouteHints>,
236 logger: L) -> impl Iterator<Item = RouteHint>
240 let mut phantom_hints: Vec<_> = Vec::new();
242 for PhantomRouteHints { channels, phantom_scid, real_node_pubkey } in phantom_route_hints {
243 log_trace!(logger, "Generating phantom route hints for node {}",
244 log_pubkey!(real_node_pubkey));
245 let route_hints = sort_and_filter_channels(channels, amt_msat, &logger);
247 // If we have any public channel, the route hints from `sort_and_filter_channels` will be
248 // empty. In that case we create a RouteHint on which we will push a single hop with the
249 // phantom route into the invoice, and let the sender find the path to the `real_node_pubkey`
250 // node by looking at our public channels.
251 let empty_route_hints = route_hints.len() == 0;
252 let mut have_pushed_empty = false;
253 let route_hints = route_hints
254 .chain(core::iter::from_fn(move || {
255 if empty_route_hints && !have_pushed_empty {
256 // set flag of having handled the empty route_hints and ensure empty vector
257 // returned only once
258 have_pushed_empty = true;
259 Some(RouteHint(Vec::new()))
264 .map(move |mut hint| {
265 hint.0.push(RouteHintHop {
266 src_node_id: real_node_pubkey,
267 short_channel_id: phantom_scid,
270 proportional_millionths: 0,
272 cltv_expiry_delta: MIN_CLTV_EXPIRY_DELTA,
273 htlc_minimum_msat: None,
274 htlc_maximum_msat: None,
279 phantom_hints.push(route_hints);
282 // We have one vector per real node involved in creating the phantom invoice. To distribute
283 // the hints across our real nodes we add one hint from each in turn until no node has any hints
284 // left (if one node has more hints than any other, these will accumulate at the end of the
286 rotate_through_iterators(phantom_hints)
289 /// Draw items iteratively from multiple iterators. The items are retrieved by index and
290 /// rotates through the iterators - first the zero index then the first index then second index, etc.
291 fn rotate_through_iterators<T, I: Iterator<Item = T>>(mut vecs: Vec<I>) -> impl Iterator<Item = T> {
292 let mut iterations = 0;
294 core::iter::from_fn(move || {
295 let mut exhausted_iterators = 0;
300 let next_idx = iterations % vecs.len();
302 if let Some(item) = vecs[next_idx].next() {
305 // exhausted_vectors increase when the "next_idx" vector is exhausted
306 exhausted_iterators += 1;
307 // The check for exhausted iterators gets reset to 0 after each yield of `Some()`
308 // The loop will return None when all of the nested iterators are exhausted
309 if exhausted_iterators == vecs.len() {
316 #[cfg(feature = "std")]
317 /// Utility to construct an invoice. Generally, unless you want to do something like a custom
318 /// cltv_expiry, this is what you should be using to create an invoice. The reason being, this
319 /// method stores the invoice's payment secret and preimage in `ChannelManager`, so (a) the user
320 /// doesn't have to store preimage/payment secret information and (b) `ChannelManager` can verify
321 /// that the payment secret is valid when the invoice is paid.
323 /// `invoice_expiry_delta_secs` describes the number of seconds that the invoice is valid for
324 /// in excess of the current time.
326 /// You can specify a custom `min_final_cltv_expiry_delta`, or let LDK default it to
327 /// [`MIN_FINAL_CLTV_EXPIRY_DELTA`]. The provided expiry must be at least [`MIN_FINAL_CLTV_EXPIRY_DELTA`].
328 /// Note that LDK will add a buffer of 3 blocks to the delta to allow for up to a few new block
329 /// confirmations during routing.
331 /// [`MIN_FINAL_CLTV_EXPIRY_DETLA`]: lightning::ln::channelmanager::MIN_FINAL_CLTV_EXPIRY_DELTA
332 pub fn create_invoice_from_channelmanager<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>(
333 channelmanager: &ChannelManager<M, T, ES, NS, SP, F, R, L>, node_signer: NS, logger: L,
334 network: Currency, amt_msat: Option<u64>, description: String, invoice_expiry_delta_secs: u32,
335 min_final_cltv_expiry_delta: Option<u16>,
336 ) -> Result<Bolt11Invoice, SignOrCreationError<()>>
338 M::Target: chain::Watch<<SP::Target as SignerProvider>::Signer>,
339 T::Target: BroadcasterInterface,
340 ES::Target: EntropySource,
341 NS::Target: NodeSigner,
342 SP::Target: SignerProvider,
343 F::Target: FeeEstimator,
347 use std::time::SystemTime;
348 let duration = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH)
349 .expect("for the foreseeable future this shouldn't happen");
350 create_invoice_from_channelmanager_and_duration_since_epoch(
351 channelmanager, node_signer, logger, network, amt_msat,
352 description, duration, invoice_expiry_delta_secs, min_final_cltv_expiry_delta,
356 #[cfg(feature = "std")]
357 /// Utility to construct an invoice. Generally, unless you want to do something like a custom
358 /// cltv_expiry, this is what you should be using to create an invoice. The reason being, this
359 /// method stores the invoice's payment secret and preimage in `ChannelManager`, so (a) the user
360 /// doesn't have to store preimage/payment secret information and (b) `ChannelManager` can verify
361 /// that the payment secret is valid when the invoice is paid.
362 /// Use this variant if you want to pass the `description_hash` to the invoice.
364 /// `invoice_expiry_delta_secs` describes the number of seconds that the invoice is valid for
365 /// in excess of the current time.
367 /// You can specify a custom `min_final_cltv_expiry_delta`, or let LDK default it to
368 /// [`MIN_FINAL_CLTV_EXPIRY_DELTA`]. The provided expiry must be at least [`MIN_FINAL_CLTV_EXPIRY_DELTA`].
369 /// Note that LDK will add a buffer of 3 blocks to the delta to allow for up to a few new block
370 /// confirmations during routing.
372 /// [`MIN_FINAL_CLTV_EXPIRY_DETLA`]: lightning::ln::channelmanager::MIN_FINAL_CLTV_EXPIRY_DELTA
373 pub fn create_invoice_from_channelmanager_with_description_hash<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>(
374 channelmanager: &ChannelManager<M, T, ES, NS, SP, F, R, L>, node_signer: NS, logger: L,
375 network: Currency, amt_msat: Option<u64>, description_hash: Sha256,
376 invoice_expiry_delta_secs: u32, min_final_cltv_expiry_delta: Option<u16>,
377 ) -> Result<Bolt11Invoice, SignOrCreationError<()>>
379 M::Target: chain::Watch<<SP::Target as SignerProvider>::Signer>,
380 T::Target: BroadcasterInterface,
381 ES::Target: EntropySource,
382 NS::Target: NodeSigner,
383 SP::Target: SignerProvider,
384 F::Target: FeeEstimator,
388 use std::time::SystemTime;
390 let duration = SystemTime::now()
391 .duration_since(SystemTime::UNIX_EPOCH)
392 .expect("for the foreseeable future this shouldn't happen");
394 create_invoice_from_channelmanager_with_description_hash_and_duration_since_epoch(
395 channelmanager, node_signer, logger, network, amt_msat,
396 description_hash, duration, invoice_expiry_delta_secs, min_final_cltv_expiry_delta,
400 /// See [`create_invoice_from_channelmanager_with_description_hash`]
401 /// This version can be used in a `no_std` environment, where [`std::time::SystemTime`] is not
402 /// available and the current time is supplied by the caller.
403 pub fn create_invoice_from_channelmanager_with_description_hash_and_duration_since_epoch<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>(
404 channelmanager: &ChannelManager<M, T, ES, NS, SP, F, R, L>, node_signer: NS, logger: L,
405 network: Currency, amt_msat: Option<u64>, description_hash: Sha256,
406 duration_since_epoch: Duration, invoice_expiry_delta_secs: u32, min_final_cltv_expiry_delta: Option<u16>,
407 ) -> Result<Bolt11Invoice, SignOrCreationError<()>>
409 M::Target: chain::Watch<<SP::Target as SignerProvider>::Signer>,
410 T::Target: BroadcasterInterface,
411 ES::Target: EntropySource,
412 NS::Target: NodeSigner,
413 SP::Target: SignerProvider,
414 F::Target: FeeEstimator,
418 _create_invoice_from_channelmanager_and_duration_since_epoch(
419 channelmanager, node_signer, logger, network, amt_msat,
420 Bolt11InvoiceDescription::Hash(&description_hash),
421 duration_since_epoch, invoice_expiry_delta_secs, min_final_cltv_expiry_delta,
425 /// See [`create_invoice_from_channelmanager`]
426 /// This version can be used in a `no_std` environment, where [`std::time::SystemTime`] is not
427 /// available and the current time is supplied by the caller.
428 pub fn create_invoice_from_channelmanager_and_duration_since_epoch<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>(
429 channelmanager: &ChannelManager<M, T, ES, NS, SP, F, R, L>, node_signer: NS, logger: L,
430 network: Currency, amt_msat: Option<u64>, description: String, duration_since_epoch: Duration,
431 invoice_expiry_delta_secs: u32, min_final_cltv_expiry_delta: Option<u16>,
432 ) -> Result<Bolt11Invoice, SignOrCreationError<()>>
434 M::Target: chain::Watch<<SP::Target as SignerProvider>::Signer>,
435 T::Target: BroadcasterInterface,
436 ES::Target: EntropySource,
437 NS::Target: NodeSigner,
438 SP::Target: SignerProvider,
439 F::Target: FeeEstimator,
443 _create_invoice_from_channelmanager_and_duration_since_epoch(
444 channelmanager, node_signer, logger, network, amt_msat,
445 Bolt11InvoiceDescription::Direct(
446 &Description::new(description).map_err(SignOrCreationError::CreationError)?,
448 duration_since_epoch, invoice_expiry_delta_secs, min_final_cltv_expiry_delta,
452 fn _create_invoice_from_channelmanager_and_duration_since_epoch<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>(
453 channelmanager: &ChannelManager<M, T, ES, NS, SP, F, R, L>, node_signer: NS, logger: L,
454 network: Currency, amt_msat: Option<u64>, description: Bolt11InvoiceDescription,
455 duration_since_epoch: Duration, invoice_expiry_delta_secs: u32, min_final_cltv_expiry_delta: Option<u16>,
456 ) -> Result<Bolt11Invoice, SignOrCreationError<()>>
458 M::Target: chain::Watch<<SP::Target as SignerProvider>::Signer>,
459 T::Target: BroadcasterInterface,
460 ES::Target: EntropySource,
461 NS::Target: NodeSigner,
462 SP::Target: SignerProvider,
463 F::Target: FeeEstimator,
467 if min_final_cltv_expiry_delta.is_some() && min_final_cltv_expiry_delta.unwrap().saturating_add(3) < MIN_FINAL_CLTV_EXPIRY_DELTA {
468 return Err(SignOrCreationError::CreationError(CreationError::MinFinalCltvExpiryDeltaTooShort));
471 // `create_inbound_payment` only returns an error if the amount is greater than the total bitcoin
473 let (payment_hash, payment_secret) = channelmanager
474 .create_inbound_payment(amt_msat, invoice_expiry_delta_secs, min_final_cltv_expiry_delta)
475 .map_err(|()| SignOrCreationError::CreationError(CreationError::InvalidAmount))?;
476 _create_invoice_from_channelmanager_and_duration_since_epoch_with_payment_hash(
477 channelmanager, node_signer, logger, network, amt_msat, description, duration_since_epoch,
478 invoice_expiry_delta_secs, payment_hash, payment_secret, min_final_cltv_expiry_delta)
481 /// See [`create_invoice_from_channelmanager_and_duration_since_epoch`]
482 /// This version allows for providing a custom [`PaymentHash`] for the invoice.
483 /// This may be useful if you're building an on-chain swap or involving another protocol where
484 /// the payment hash is also involved outside the scope of lightning.
485 pub fn create_invoice_from_channelmanager_and_duration_since_epoch_with_payment_hash<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>(
486 channelmanager: &ChannelManager<M, T, ES, NS, SP, F, R, L>, node_signer: NS, logger: L,
487 network: Currency, amt_msat: Option<u64>, description: String, duration_since_epoch: Duration,
488 invoice_expiry_delta_secs: u32, payment_hash: PaymentHash, min_final_cltv_expiry_delta: Option<u16>,
489 ) -> Result<Bolt11Invoice, SignOrCreationError<()>>
491 M::Target: chain::Watch<<SP::Target as SignerProvider>::Signer>,
492 T::Target: BroadcasterInterface,
493 ES::Target: EntropySource,
494 NS::Target: NodeSigner,
495 SP::Target: SignerProvider,
496 F::Target: FeeEstimator,
500 let payment_secret = channelmanager
501 .create_inbound_payment_for_hash(payment_hash, amt_msat, invoice_expiry_delta_secs,
502 min_final_cltv_expiry_delta)
503 .map_err(|()| SignOrCreationError::CreationError(CreationError::InvalidAmount))?;
504 _create_invoice_from_channelmanager_and_duration_since_epoch_with_payment_hash(
505 channelmanager, node_signer, logger, network, amt_msat,
506 Bolt11InvoiceDescription::Direct(
507 &Description::new(description).map_err(SignOrCreationError::CreationError)?,
509 duration_since_epoch, invoice_expiry_delta_secs, payment_hash, payment_secret,
510 min_final_cltv_expiry_delta,
514 fn _create_invoice_from_channelmanager_and_duration_since_epoch_with_payment_hash<M: Deref, T: Deref, ES: Deref, NS: Deref, SP: Deref, F: Deref, R: Deref, L: Deref>(
515 channelmanager: &ChannelManager<M, T, ES, NS, SP, F, R, L>, node_signer: NS, logger: L,
516 network: Currency, amt_msat: Option<u64>, description: Bolt11InvoiceDescription,
517 duration_since_epoch: Duration, invoice_expiry_delta_secs: u32, payment_hash: PaymentHash,
518 payment_secret: PaymentSecret, min_final_cltv_expiry_delta: Option<u16>,
519 ) -> Result<Bolt11Invoice, SignOrCreationError<()>>
521 M::Target: chain::Watch<<SP::Target as SignerProvider>::Signer>,
522 T::Target: BroadcasterInterface,
523 ES::Target: EntropySource,
524 NS::Target: NodeSigner,
525 SP::Target: SignerProvider,
526 F::Target: FeeEstimator,
530 let our_node_pubkey = channelmanager.get_our_node_id();
531 let channels = channelmanager.list_channels();
533 if min_final_cltv_expiry_delta.is_some() && min_final_cltv_expiry_delta.unwrap().saturating_add(3) < MIN_FINAL_CLTV_EXPIRY_DELTA {
534 return Err(SignOrCreationError::CreationError(CreationError::MinFinalCltvExpiryDeltaTooShort));
537 log_trace!(logger, "Creating invoice with payment hash {}", &payment_hash);
539 let invoice = match description {
540 Bolt11InvoiceDescription::Direct(description) => {
541 InvoiceBuilder::new(network).description(description.0.clone())
543 Bolt11InvoiceDescription::Hash(hash) => InvoiceBuilder::new(network).description_hash(hash.0),
546 let mut invoice = invoice
547 .duration_since_epoch(duration_since_epoch)
548 .payee_pub_key(our_node_pubkey)
549 .payment_hash(Hash::from_slice(&payment_hash.0).unwrap())
550 .payment_secret(payment_secret)
552 .min_final_cltv_expiry_delta(
553 // Add a buffer of 3 to the delta if present, otherwise use LDK's minimum.
554 min_final_cltv_expiry_delta.map(|x| x.saturating_add(3)).unwrap_or(MIN_FINAL_CLTV_EXPIRY_DELTA).into())
555 .expiry_time(Duration::from_secs(invoice_expiry_delta_secs.into()));
556 if let Some(amt) = amt_msat {
557 invoice = invoice.amount_milli_satoshis(amt);
560 let route_hints = sort_and_filter_channels(channels, amt_msat, &logger);
561 for hint in route_hints {
562 invoice = invoice.private_route(hint);
565 let raw_invoice = match invoice.build_raw() {
567 Err(e) => return Err(SignOrCreationError::CreationError(e))
569 let hrp_str = raw_invoice.hrp.to_string();
570 let hrp_bytes = hrp_str.as_bytes();
571 let data_without_signature = raw_invoice.data.to_base32();
572 let signed_raw_invoice = raw_invoice.sign(|_| node_signer.sign_invoice(hrp_bytes, &data_without_signature, Recipient::Node));
573 match signed_raw_invoice {
574 Ok(inv) => Ok(Bolt11Invoice::from_signed(inv).unwrap()),
575 Err(e) => Err(SignOrCreationError::SignError(e))
579 /// Sorts and filters the `channels` for an invoice, and returns the corresponding `RouteHint`s to include
582 /// The filtering is based on the following criteria:
583 /// * Only one channel per counterparty node
584 /// * If the counterparty has a channel that is above the `min_inbound_capacity_msat` + 10% scaling
585 /// factor (to allow some margin for change in inbound), select the channel with the lowest
586 /// inbound capacity that is above this threshold.
587 /// * If no `min_inbound_capacity_msat` is specified, or the counterparty has no channels above the
588 /// minimum + 10% scaling factor, select the channel with the highest inbound capacity per counterparty.
589 /// * Prefer channels with capacity at least `min_inbound_capacity_msat` and where the channel
590 /// `is_usable` (i.e. the peer is connected).
591 /// * If any public channel exists, only public [`RouteHint`]s will be returned.
592 /// * If any public, announced, channel exists (i.e. a channel with 7+ confs, to ensure the
593 /// announcement has had a chance to propagate), no [`RouteHint`]s will be returned, as the
594 /// sender is expected to find the path by looking at the public channels instead.
595 /// * Limited to a total of 3 channels.
596 /// * Sorted by lowest inbound capacity if an online channel with the minimum amount requested exists,
597 /// otherwise sort by highest inbound capacity to give the payment the best chance of succeeding.
598 fn sort_and_filter_channels<L: Deref>(
599 channels: Vec<ChannelDetails>,
600 min_inbound_capacity_msat: Option<u64>,
602 ) -> impl ExactSizeIterator<Item = RouteHint>
606 let mut filtered_channels: HashMap<PublicKey, ChannelDetails> = HashMap::new();
607 let min_inbound_capacity = min_inbound_capacity_msat.unwrap_or(0);
608 let mut min_capacity_channel_exists = false;
609 let mut online_channel_exists = false;
610 let mut online_min_capacity_channel_exists = false;
611 let mut has_pub_unconf_chan = false;
613 let route_hint_from_channel = |channel: ChannelDetails| {
614 let forwarding_info = channel.counterparty.forwarding_info.as_ref().unwrap();
615 RouteHint(vec![RouteHintHop {
616 src_node_id: channel.counterparty.node_id,
617 short_channel_id: channel.get_inbound_payment_scid().unwrap(),
619 base_msat: forwarding_info.fee_base_msat,
620 proportional_millionths: forwarding_info.fee_proportional_millionths,
622 cltv_expiry_delta: forwarding_info.cltv_expiry_delta,
623 htlc_minimum_msat: channel.inbound_htlc_minimum_msat,
624 htlc_maximum_msat: channel.inbound_htlc_maximum_msat,}])
627 log_trace!(logger, "Considering {} channels for invoice route hints", channels.len());
628 for channel in channels.into_iter().filter(|chan| chan.is_channel_ready) {
629 if channel.get_inbound_payment_scid().is_none() || channel.counterparty.forwarding_info.is_none() {
630 log_trace!(logger, "Ignoring channel {} for invoice route hints", &channel.channel_id);
634 if channel.is_public {
635 if channel.confirmations.is_some() && channel.confirmations < Some(7) {
636 // If we have a public channel, but it doesn't have enough confirmations to (yet)
637 // be in the public network graph (and have gotten a chance to propagate), include
638 // route hints but only for public channels to protect private channel privacy.
639 has_pub_unconf_chan = true;
641 // If any public channel exists, return no hints and let the sender
642 // look at the public channels instead.
643 log_trace!(logger, "Not including channels in invoice route hints on account of public channel {}",
644 &channel.channel_id);
645 return vec![].into_iter().take(MAX_CHANNEL_HINTS).map(route_hint_from_channel);
649 if channel.inbound_capacity_msat >= min_inbound_capacity {
650 if !min_capacity_channel_exists {
651 log_trace!(logger, "Channel with enough inbound capacity exists for invoice route hints");
652 min_capacity_channel_exists = true;
655 if channel.is_usable {
656 online_min_capacity_channel_exists = true;
660 if channel.is_usable && !online_channel_exists {
661 log_trace!(logger, "Channel with connected peer exists for invoice route hints");
662 online_channel_exists = true;
665 match filtered_channels.entry(channel.counterparty.node_id) {
666 hash_map::Entry::Occupied(mut entry) => {
667 let current_max_capacity = entry.get().inbound_capacity_msat;
668 // If this channel is public and the previous channel is not, ensure we replace the
669 // previous channel to avoid announcing non-public channels.
670 let new_now_public = channel.is_public && !entry.get().is_public;
671 // Decide whether we prefer the currently selected channel with the node to the new one,
672 // based on their inbound capacity.
673 let prefer_current = prefer_current_channel(min_inbound_capacity_msat, current_max_capacity,
674 channel.inbound_capacity_msat);
675 // If the public-ness of the channel has not changed (in which case simply defer to
676 // `new_now_public), and this channel has more desirable inbound than the incumbent,
677 // prefer to include this channel.
678 let new_channel_preferable = channel.is_public == entry.get().is_public && !prefer_current;
680 if new_now_public || new_channel_preferable {
682 "Preferring counterparty {} channel {} (SCID {:?}, {} msats) over {} (SCID {:?}, {} msats) for invoice route hints",
683 log_pubkey!(channel.counterparty.node_id),
684 &channel.channel_id, channel.short_channel_id,
685 channel.inbound_capacity_msat,
686 &entry.get().channel_id, entry.get().short_channel_id,
687 current_max_capacity);
688 entry.insert(channel);
691 "Preferring counterparty {} channel {} (SCID {:?}, {} msats) over {} (SCID {:?}, {} msats) for invoice route hints",
692 log_pubkey!(channel.counterparty.node_id),
693 &entry.get().channel_id, entry.get().short_channel_id,
694 current_max_capacity,
695 &channel.channel_id, channel.short_channel_id,
696 channel.inbound_capacity_msat);
699 hash_map::Entry::Vacant(entry) => {
700 entry.insert(channel);
705 // If all channels are private, prefer to return route hints which have a higher capacity than
706 // the payment value and where we're currently connected to the channel counterparty.
707 // Even if we cannot satisfy both goals, always ensure we include *some* hints, preferring
708 // those which meet at least one criteria.
709 let mut eligible_channels = filtered_channels
711 .map(|(_, channel)| channel)
713 let has_enough_capacity = channel.inbound_capacity_msat >= min_inbound_capacity;
714 let include_channel = if has_pub_unconf_chan {
715 // If we have a public channel, but it doesn't have enough confirmations to (yet)
716 // be in the public network graph (and have gotten a chance to propagate), include
717 // route hints but only for public channels to protect private channel privacy.
719 } else if online_min_capacity_channel_exists {
720 has_enough_capacity && channel.is_usable
721 } else if min_capacity_channel_exists && online_channel_exists {
722 // If there are some online channels and some min_capacity channels, but no
723 // online-and-min_capacity channels, just include the min capacity ones and ignore
726 } else if min_capacity_channel_exists {
728 } else if online_channel_exists {
733 log_trace!(logger, "Including channel {} in invoice route hints",
734 &channel.channel_id);
735 } else if !has_enough_capacity {
736 log_trace!(logger, "Ignoring channel {} without enough capacity for invoice route hints",
737 &channel.channel_id);
739 debug_assert!(!channel.is_usable || (has_pub_unconf_chan && !channel.is_public));
740 log_trace!(logger, "Ignoring channel {} with disconnected peer",
741 &channel.channel_id);
746 .collect::<Vec<ChannelDetails>>();
748 eligible_channels.sort_unstable_by(|a, b| {
749 if online_min_capacity_channel_exists {
750 a.inbound_capacity_msat.cmp(&b.inbound_capacity_msat)
752 b.inbound_capacity_msat.cmp(&a.inbound_capacity_msat)
755 eligible_channels.into_iter().take(MAX_CHANNEL_HINTS).map(route_hint_from_channel)
758 /// prefer_current_channel chooses a channel to use for route hints between a currently selected and candidate
759 /// channel based on the inbound capacity of each channel and the minimum inbound capacity requested for the hints,
760 /// returning true if the current channel should be preferred over the candidate channel.
761 /// * If no minimum amount is requested, the channel with the most inbound is chosen to maximize the chances that a
762 /// payment of any size will succeed.
763 /// * If we have channels with inbound above our minimum requested inbound (plus a 10% scaling factor, expressed as a
764 /// percentage) then we choose the lowest inbound channel with above this amount. If we have sufficient inbound
765 /// channels, we don't want to deplete our larger channels with small payments (the off-chain version of "grinding
767 /// * If no channel above our minimum amount exists, then we just prefer the channel with the most inbound to give
768 /// payments the best chance of succeeding in multiple parts.
769 fn prefer_current_channel(min_inbound_capacity_msat: Option<u64>, current_channel: u64,
770 candidate_channel: u64) -> bool {
772 // If no min amount is given for the hints, err of the side of caution and choose the largest channel inbound to
773 // maximize chances of any payment succeeding.
774 if min_inbound_capacity_msat.is_none() {
775 return current_channel > candidate_channel
778 let scaled_min_inbound = min_inbound_capacity_msat.unwrap() * 110;
779 let current_sufficient = current_channel * 100 >= scaled_min_inbound;
780 let candidate_sufficient = candidate_channel * 100 >= scaled_min_inbound;
782 if current_sufficient && candidate_sufficient {
783 return current_channel < candidate_channel
784 } else if current_sufficient {
786 } else if candidate_sufficient {
790 current_channel > candidate_channel
795 use core::cell::RefCell;
796 use core::time::Duration;
797 use crate::{Currency, Description, Bolt11InvoiceDescription, SignOrCreationError, CreationError};
798 use bitcoin_hashes::{Hash, sha256};
799 use bitcoin_hashes::sha256::Hash as Sha256;
800 use lightning::sign::PhantomKeysManager;
801 use lightning::events::{MessageSendEvent, MessageSendEventsProvider, Event, EventsProvider};
802 use lightning::ln::{PaymentPreimage, PaymentHash};
803 use lightning::ln::channelmanager::{PhantomRouteHints, MIN_FINAL_CLTV_EXPIRY_DELTA, PaymentId, RecipientOnionFields, Retry};
804 use lightning::ln::functional_test_utils::*;
805 use lightning::ln::msgs::ChannelMessageHandler;
806 use lightning::routing::router::{PaymentParameters, RouteParameters};
807 use lightning::util::test_utils;
808 use lightning::util::config::UserConfig;
809 use crate::utils::{create_invoice_from_channelmanager_and_duration_since_epoch, rotate_through_iterators};
810 use std::collections::HashSet;
813 fn test_prefer_current_channel() {
814 // No minimum, prefer larger candidate channel.
815 assert_eq!(crate::utils::prefer_current_channel(None, 100, 200), false);
817 // No minimum, prefer larger current channel.
818 assert_eq!(crate::utils::prefer_current_channel(None, 200, 100), true);
820 // Minimum set, prefer current channel over minimum + buffer.
821 assert_eq!(crate::utils::prefer_current_channel(Some(100), 115, 100), true);
823 // Minimum set, prefer candidate channel over minimum + buffer.
824 assert_eq!(crate::utils::prefer_current_channel(Some(100), 105, 125), false);
826 // Minimum set, both channels sufficient, prefer smaller current channel.
827 assert_eq!(crate::utils::prefer_current_channel(Some(100), 115, 125), true);
829 // Minimum set, both channels sufficient, prefer smaller candidate channel.
830 assert_eq!(crate::utils::prefer_current_channel(Some(100), 200, 160), false);
832 // Minimum set, neither sufficient, prefer larger current channel.
833 assert_eq!(crate::utils::prefer_current_channel(Some(200), 100, 50), true);
835 // Minimum set, neither sufficient, prefer larger candidate channel.
836 assert_eq!(crate::utils::prefer_current_channel(Some(200), 100, 150), false);
841 fn test_from_channelmanager() {
842 let chanmon_cfgs = create_chanmon_cfgs(2);
843 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
844 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
845 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
846 create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 10001);
847 let non_default_invoice_expiry_secs = 4200;
848 let invoice = create_invoice_from_channelmanager_and_duration_since_epoch(
849 nodes[1].node, nodes[1].keys_manager, nodes[1].logger, Currency::BitcoinTestnet,
850 Some(10_000), "test".to_string(), Duration::from_secs(1234567),
851 non_default_invoice_expiry_secs, None).unwrap();
852 assert_eq!(invoice.amount_pico_btc(), Some(100_000));
853 // If no `min_final_cltv_expiry_delta` is specified, then it should be `MIN_FINAL_CLTV_EXPIRY_DELTA`.
854 assert_eq!(invoice.min_final_cltv_expiry_delta(), MIN_FINAL_CLTV_EXPIRY_DELTA as u64);
855 assert_eq!(invoice.description(), Bolt11InvoiceDescription::Direct(&Description("test".to_string())));
856 assert_eq!(invoice.expiry_time(), Duration::from_secs(non_default_invoice_expiry_secs.into()));
858 // Invoice SCIDs should always use inbound SCID aliases over the real channel ID, if one is
860 let chan = &nodes[1].node.list_usable_channels()[0];
861 assert_eq!(invoice.route_hints().len(), 1);
862 assert_eq!(invoice.route_hints()[0].0.len(), 1);
863 assert_eq!(invoice.route_hints()[0].0[0].short_channel_id, chan.inbound_scid_alias.unwrap());
865 assert_eq!(invoice.route_hints()[0].0[0].htlc_minimum_msat, chan.inbound_htlc_minimum_msat);
866 assert_eq!(invoice.route_hints()[0].0[0].htlc_maximum_msat, chan.inbound_htlc_maximum_msat);
868 let payment_params = PaymentParameters::from_node_id(invoice.recover_payee_pub_key(),
869 invoice.min_final_cltv_expiry_delta() as u32)
870 .with_bolt11_features(invoice.features().unwrap().clone()).unwrap()
871 .with_route_hints(invoice.route_hints()).unwrap();
872 let route_params = RouteParameters::from_payment_params_and_value(
873 payment_params, invoice.amount_milli_satoshis().unwrap());
874 let payment_event = {
875 let mut payment_hash = PaymentHash([0; 32]);
876 payment_hash.0.copy_from_slice(&invoice.payment_hash().as_ref()[0..32]);
877 nodes[0].node.send_payment(payment_hash,
878 RecipientOnionFields::secret_only(*invoice.payment_secret()),
879 PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();
880 let mut added_monitors = nodes[0].chain_monitor.added_monitors.lock().unwrap();
881 assert_eq!(added_monitors.len(), 1);
882 added_monitors.clear();
884 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
885 assert_eq!(events.len(), 1);
886 SendEvent::from_event(events.remove(0))
889 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
890 nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &payment_event.commitment_msg);
891 let mut added_monitors = nodes[1].chain_monitor.added_monitors.lock().unwrap();
892 assert_eq!(added_monitors.len(), 1);
893 added_monitors.clear();
894 let events = nodes[1].node.get_and_clear_pending_msg_events();
895 assert_eq!(events.len(), 2);
898 fn do_create_invoice_min_final_cltv_delta(with_custom_delta: bool) {
899 let chanmon_cfgs = create_chanmon_cfgs(2);
900 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
901 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
902 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
903 let custom_min_final_cltv_expiry_delta = Some(50);
905 let invoice = crate::utils::create_invoice_from_channelmanager_and_duration_since_epoch(
906 nodes[1].node, nodes[1].keys_manager, nodes[1].logger, Currency::BitcoinTestnet,
907 Some(10_000), "".into(), Duration::from_secs(1234567), 3600,
908 if with_custom_delta { custom_min_final_cltv_expiry_delta } else { None },
910 assert_eq!(invoice.min_final_cltv_expiry_delta(), if with_custom_delta {
911 custom_min_final_cltv_expiry_delta.unwrap() + 3 /* Buffer */} else { MIN_FINAL_CLTV_EXPIRY_DELTA } as u64);
915 fn test_create_invoice_custom_min_final_cltv_delta() {
916 do_create_invoice_min_final_cltv_delta(true);
917 do_create_invoice_min_final_cltv_delta(false);
921 fn create_invoice_min_final_cltv_delta_equals_htlc_fail_buffer() {
922 let chanmon_cfgs = create_chanmon_cfgs(2);
923 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
924 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
925 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
926 let custom_min_final_cltv_expiry_delta = Some(21);
928 let invoice = crate::utils::create_invoice_from_channelmanager_and_duration_since_epoch(
929 nodes[1].node, nodes[1].keys_manager, nodes[1].logger, Currency::BitcoinTestnet,
930 Some(10_000), "".into(), Duration::from_secs(1234567), 3600,
931 custom_min_final_cltv_expiry_delta,
933 assert_eq!(invoice.min_final_cltv_expiry_delta(), MIN_FINAL_CLTV_EXPIRY_DELTA as u64);
937 fn test_create_invoice_with_description_hash() {
938 let chanmon_cfgs = create_chanmon_cfgs(2);
939 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
940 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
941 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
942 let description_hash = crate::Sha256(Hash::hash("Testing description_hash".as_bytes()));
943 let invoice = crate::utils::create_invoice_from_channelmanager_with_description_hash_and_duration_since_epoch(
944 nodes[1].node, nodes[1].keys_manager, nodes[1].logger, Currency::BitcoinTestnet,
945 Some(10_000), description_hash, Duration::from_secs(1234567), 3600, None,
947 assert_eq!(invoice.amount_pico_btc(), Some(100_000));
948 assert_eq!(invoice.min_final_cltv_expiry_delta(), MIN_FINAL_CLTV_EXPIRY_DELTA as u64);
949 assert_eq!(invoice.description(), Bolt11InvoiceDescription::Hash(&crate::Sha256(Sha256::hash("Testing description_hash".as_bytes()))));
953 fn test_create_invoice_from_channelmanager_and_duration_since_epoch_with_payment_hash() {
954 let chanmon_cfgs = create_chanmon_cfgs(2);
955 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
956 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
957 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
958 let payment_hash = PaymentHash([0; 32]);
959 let invoice = crate::utils::create_invoice_from_channelmanager_and_duration_since_epoch_with_payment_hash(
960 nodes[1].node, nodes[1].keys_manager, nodes[1].logger, Currency::BitcoinTestnet,
961 Some(10_000), "test".to_string(), Duration::from_secs(1234567), 3600,
964 assert_eq!(invoice.amount_pico_btc(), Some(100_000));
965 assert_eq!(invoice.min_final_cltv_expiry_delta(), MIN_FINAL_CLTV_EXPIRY_DELTA as u64);
966 assert_eq!(invoice.description(), Bolt11InvoiceDescription::Direct(&Description("test".to_string())));
967 assert_eq!(invoice.payment_hash(), &sha256::Hash::from_slice(&payment_hash.0[..]).unwrap());
971 fn test_hints_has_only_public_confd_channels() {
972 let chanmon_cfgs = create_chanmon_cfgs(2);
973 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
974 let mut config = test_default_channel_config();
975 config.channel_handshake_config.minimum_depth = 1;
976 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[Some(config), Some(config)]);
977 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
979 // Create a private channel with lots of capacity and a lower value public channel (without
980 // confirming the funding tx yet).
981 let unannounced_scid = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 0);
982 let conf_tx = create_chan_between_nodes_with_value_init(&nodes[0], &nodes[1], 10_000, 0);
984 // Before the channel is available, we should include the unannounced_scid.
985 let mut scid_aliases = HashSet::new();
986 scid_aliases.insert(unannounced_scid.0.short_channel_id_alias.unwrap());
987 match_invoice_routes(Some(5000), &nodes[1], scid_aliases.clone());
989 // However after we mine the funding tx and exchange channel_ready messages for the public
990 // channel we'll immediately switch to including it as a route hint, even though it isn't
992 let pub_channel_scid = mine_transaction(&nodes[0], &conf_tx);
993 let node_a_pub_channel_ready = get_event_msg!(nodes[0], MessageSendEvent::SendChannelReady, nodes[1].node.get_our_node_id());
994 nodes[1].node.handle_channel_ready(&nodes[0].node.get_our_node_id(), &node_a_pub_channel_ready);
996 assert_eq!(mine_transaction(&nodes[1], &conf_tx), pub_channel_scid);
997 let events = nodes[1].node.get_and_clear_pending_msg_events();
998 assert_eq!(events.len(), 2);
999 if let MessageSendEvent::SendChannelReady { msg, .. } = &events[0] {
1000 nodes[0].node.handle_channel_ready(&nodes[1].node.get_our_node_id(), msg);
1001 } else { panic!(); }
1002 if let MessageSendEvent::SendChannelUpdate { msg, .. } = &events[1] {
1003 nodes[0].node.handle_channel_update(&nodes[1].node.get_our_node_id(), msg);
1004 } else { panic!(); }
1006 nodes[1].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &get_event_msg!(nodes[0], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id()));
1008 expect_channel_ready_event(&nodes[0], &nodes[1].node.get_our_node_id());
1009 expect_channel_ready_event(&nodes[1], &nodes[0].node.get_our_node_id());
1011 scid_aliases.clear();
1012 scid_aliases.insert(node_a_pub_channel_ready.short_channel_id_alias.unwrap());
1013 match_invoice_routes(Some(5000), &nodes[1], scid_aliases.clone());
1014 // This also applies even if the amount is more than the payment amount, to ensure users
1015 // dont screw up their privacy.
1016 match_invoice_routes(Some(50_000_000), &nodes[1], scid_aliases.clone());
1018 // The same remains true until the channel has 7 confirmations, at which point we include
1020 connect_blocks(&nodes[1], 5);
1021 match_invoice_routes(Some(5000), &nodes[1], scid_aliases.clone());
1022 connect_blocks(&nodes[1], 1);
1023 get_event_msg!(nodes[1], MessageSendEvent::SendAnnouncementSignatures, nodes[0].node.get_our_node_id());
1024 match_invoice_routes(Some(5000), &nodes[1], HashSet::new());
1028 fn test_hints_includes_single_channels_to_nodes() {
1029 let chanmon_cfgs = create_chanmon_cfgs(3);
1030 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1031 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1032 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1034 let chan_1_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 0, 100000, 10001);
1035 let chan_2_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 2, 0, 100000, 10001);
1037 let mut scid_aliases = HashSet::new();
1038 scid_aliases.insert(chan_1_0.0.short_channel_id_alias.unwrap());
1039 scid_aliases.insert(chan_2_0.0.short_channel_id_alias.unwrap());
1041 match_invoice_routes(Some(5000), &nodes[0], scid_aliases);
1045 fn test_hints_has_only_lowest_inbound_capacity_channel_above_minimum() {
1046 let chanmon_cfgs = create_chanmon_cfgs(2);
1047 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1048 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
1049 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1051 let _chan_1_0_inbound_below_amt = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 0, 10_000, 0);
1052 let _chan_1_0_large_inbound_above_amt = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 0, 500_000, 0);
1053 let chan_1_0_low_inbound_above_amt = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 0, 200_000, 0);
1055 let mut scid_aliases = HashSet::new();
1056 scid_aliases.insert(chan_1_0_low_inbound_above_amt.0.short_channel_id_alias.unwrap());
1057 match_invoice_routes(Some(100_000_000), &nodes[0], scid_aliases);
1061 fn test_hints_has_only_online_channels() {
1062 let chanmon_cfgs = create_chanmon_cfgs(4);
1063 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
1064 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
1065 let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
1066 let chan_a = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 0, 10_000_000, 0);
1067 let chan_b = create_unannounced_chan_between_nodes_with_value(&nodes, 2, 0, 10_000_000, 0);
1068 let _chan_c = create_unannounced_chan_between_nodes_with_value(&nodes, 3, 0, 1_000_000, 0);
1070 // With all peers connected we should get all hints that have sufficient value
1071 let mut scid_aliases = HashSet::new();
1072 scid_aliases.insert(chan_a.0.short_channel_id_alias.unwrap());
1073 scid_aliases.insert(chan_b.0.short_channel_id_alias.unwrap());
1075 match_invoice_routes(Some(1_000_000_000), &nodes[0], scid_aliases.clone());
1077 // With only one sufficient-value peer connected we should only get its hint
1078 scid_aliases.remove(&chan_b.0.short_channel_id_alias.unwrap());
1079 nodes[0].node.peer_disconnected(&nodes[2].node.get_our_node_id());
1080 match_invoice_routes(Some(1_000_000_000), &nodes[0], scid_aliases.clone());
1082 // If we don't have any sufficient-value peers connected we should get all hints with
1083 // sufficient value, even though there is a connected insufficient-value peer.
1084 scid_aliases.insert(chan_b.0.short_channel_id_alias.unwrap());
1085 nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
1086 match_invoice_routes(Some(1_000_000_000), &nodes[0], scid_aliases);
1090 fn test_insufficient_inbound_sort_by_highest_capacity() {
1091 let chanmon_cfgs = create_chanmon_cfgs(5);
1092 let node_cfgs = create_node_cfgs(5, &chanmon_cfgs);
1093 let node_chanmgrs = create_node_chanmgrs(5, &node_cfgs, &[None, None, None, None, None]);
1094 let nodes = create_network(5, &node_cfgs, &node_chanmgrs);
1095 let _chan_1_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 0, 100_000, 0);
1096 let chan_2_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 2, 0, 200_000, 0);
1097 let chan_3_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 3, 0, 300_000, 0);
1098 let chan_4_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 4, 0, 400_000, 0);
1100 // When no single channel has enough inbound capacity for the payment, we expect the three
1101 // highest inbound channels to be chosen.
1102 let mut scid_aliases = HashSet::new();
1103 scid_aliases.insert(chan_2_0.0.short_channel_id_alias.unwrap());
1104 scid_aliases.insert(chan_3_0.0.short_channel_id_alias.unwrap());
1105 scid_aliases.insert(chan_4_0.0.short_channel_id_alias.unwrap());
1107 match_invoice_routes(Some(1_000_000_000), &nodes[0], scid_aliases.clone());
1111 fn test_sufficient_inbound_sort_by_lowest_capacity() {
1112 let chanmon_cfgs = create_chanmon_cfgs(5);
1113 let node_cfgs = create_node_cfgs(5, &chanmon_cfgs);
1114 let node_chanmgrs = create_node_chanmgrs(5, &node_cfgs, &[None, None, None, None, None]);
1115 let nodes = create_network(5, &node_cfgs, &node_chanmgrs);
1116 let chan_1_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 0, 100_000, 0);
1117 let chan_2_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 2, 0, 200_000, 0);
1118 let chan_3_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 3, 0, 300_000, 0);
1119 let _chan_4_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 4, 0, 400_000, 0);
1121 // When we have channels that have sufficient inbound for the payment, test that we sort
1122 // by lowest inbound capacity.
1123 let mut scid_aliases = HashSet::new();
1124 scid_aliases.insert(chan_1_0.0.short_channel_id_alias.unwrap());
1125 scid_aliases.insert(chan_2_0.0.short_channel_id_alias.unwrap());
1126 scid_aliases.insert(chan_3_0.0.short_channel_id_alias.unwrap());
1128 match_invoice_routes(Some(50_000_000), &nodes[0], scid_aliases.clone());
1132 fn test_forwarding_info_not_assigned_channel_excluded_from_hints() {
1133 let chanmon_cfgs = create_chanmon_cfgs(3);
1134 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1135 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1136 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1137 let chan_1_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 0, 100000, 10001);
1139 // Create an unannonced channel between `nodes[2]` and `nodes[0]`, for which the
1140 // `msgs::ChannelUpdate` is never handled for the node(s). As the `msgs::ChannelUpdate`
1141 // is never handled, the `channel.counterparty.forwarding_info` is never assigned.
1142 let mut private_chan_cfg = UserConfig::default();
1143 private_chan_cfg.channel_handshake_config.announced_channel = false;
1144 let temporary_channel_id = nodes[2].node.create_channel(nodes[0].node.get_our_node_id(), 1_000_000, 500_000_000, 42, Some(private_chan_cfg)).unwrap();
1145 let open_channel = get_event_msg!(nodes[2], MessageSendEvent::SendOpenChannel, nodes[0].node.get_our_node_id());
1146 nodes[0].node.handle_open_channel(&nodes[2].node.get_our_node_id(), &open_channel);
1147 let accept_channel = get_event_msg!(nodes[0], MessageSendEvent::SendAcceptChannel, nodes[2].node.get_our_node_id());
1148 nodes[2].node.handle_accept_channel(&nodes[0].node.get_our_node_id(), &accept_channel);
1150 let tx = sign_funding_transaction(&nodes[2], &nodes[0], 1_000_000, temporary_channel_id);
1152 let conf_height = core::cmp::max(nodes[2].best_block_info().1 + 1, nodes[0].best_block_info().1 + 1);
1153 confirm_transaction_at(&nodes[2], &tx, conf_height);
1154 connect_blocks(&nodes[2], CHAN_CONFIRM_DEPTH - 1);
1155 confirm_transaction_at(&nodes[0], &tx, conf_height);
1156 connect_blocks(&nodes[0], CHAN_CONFIRM_DEPTH - 1);
1157 let as_channel_ready = get_event_msg!(nodes[2], MessageSendEvent::SendChannelReady, nodes[0].node.get_our_node_id());
1158 nodes[2].node.handle_channel_ready(&nodes[0].node.get_our_node_id(), &get_event_msg!(nodes[0], MessageSendEvent::SendChannelReady, nodes[2].node.get_our_node_id()));
1159 get_event_msg!(nodes[2], MessageSendEvent::SendChannelUpdate, nodes[0].node.get_our_node_id());
1160 nodes[0].node.handle_channel_ready(&nodes[2].node.get_our_node_id(), &as_channel_ready);
1161 get_event_msg!(nodes[0], MessageSendEvent::SendChannelUpdate, nodes[2].node.get_our_node_id());
1162 expect_channel_ready_event(&nodes[0], &nodes[2].node.get_our_node_id());
1163 expect_channel_ready_event(&nodes[2], &nodes[0].node.get_our_node_id());
1165 // As `msgs::ChannelUpdate` was never handled for the participating node(s) of the second
1166 // channel, the channel will never be assigned any `counterparty.forwarding_info`.
1167 // Therefore only `chan_1_0` should be included in the hints.
1168 let mut scid_aliases = HashSet::new();
1169 scid_aliases.insert(chan_1_0.0.short_channel_id_alias.unwrap());
1170 match_invoice_routes(Some(5000), &nodes[0], scid_aliases);
1174 fn test_no_hints_if_a_mix_between_public_and_private_channel_exists() {
1175 let chanmon_cfgs = create_chanmon_cfgs(3);
1176 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1177 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1178 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1179 let _chan_1_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 0, 100000, 10001);
1181 let chan_2_0 = create_announced_chan_between_nodes_with_value(&nodes, 2, 0, 100000, 10001);
1182 nodes[2].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &chan_2_0.1);
1183 nodes[0].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan_2_0.0);
1185 // Ensure that the invoice doesn't include any route hints for any of `nodes[0]` channels,
1186 // even though all channels between `nodes[1]` and `nodes[0]` are private, as there is a
1187 // public channel between `nodes[2]` and `nodes[0]`
1188 match_invoice_routes(Some(5000), &nodes[0], HashSet::new());
1192 fn test_only_public_channels_includes_no_channels_in_hints() {
1193 let chanmon_cfgs = create_chanmon_cfgs(3);
1194 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1195 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1196 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1197 let chan_1_0 = create_announced_chan_between_nodes_with_value(&nodes, 1, 0, 100000, 10001);
1198 nodes[0].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &chan_1_0.0);
1199 nodes[1].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &chan_1_0.1);
1201 let chan_2_0 = create_announced_chan_between_nodes_with_value(&nodes, 2, 0, 100000, 10001);
1202 nodes[2].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &chan_2_0.1);
1203 nodes[0].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan_2_0.0);
1205 // As all of `nodes[0]` channels are public, no channels should be included in the hints
1206 match_invoice_routes(Some(5000), &nodes[0], HashSet::new());
1210 fn test_channels_with_lower_inbound_capacity_than_invoice_amt_hints_filtering() {
1211 let chanmon_cfgs = create_chanmon_cfgs(3);
1212 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1213 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1214 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1215 let chan_1_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 0, 100_000, 0);
1216 let chan_2_0 = create_unannounced_chan_between_nodes_with_value(&nodes, 2, 0, 1_000_000, 0);
1218 // As the invoice amt is 1 msat above chan_1_0's inbound capacity, it shouldn't be included
1219 let mut scid_aliases_99_000_001_msat = HashSet::new();
1220 scid_aliases_99_000_001_msat.insert(chan_2_0.0.short_channel_id_alias.unwrap());
1222 match_invoice_routes(Some(99_000_001), &nodes[0], scid_aliases_99_000_001_msat);
1224 // As the invoice amt is exactly at chan_1_0's inbound capacity, it should be included
1225 let mut scid_aliases_99_000_000_msat = HashSet::new();
1226 scid_aliases_99_000_000_msat.insert(chan_1_0.0.short_channel_id_alias.unwrap());
1227 scid_aliases_99_000_000_msat.insert(chan_2_0.0.short_channel_id_alias.unwrap());
1229 match_invoice_routes(Some(99_000_000), &nodes[0], scid_aliases_99_000_000_msat);
1231 // As the invoice amt is above all channels' inbound capacity, they will still be included
1232 let mut scid_aliases_2_000_000_000_msat = HashSet::new();
1233 scid_aliases_2_000_000_000_msat.insert(chan_1_0.0.short_channel_id_alias.unwrap());
1234 scid_aliases_2_000_000_000_msat.insert(chan_2_0.0.short_channel_id_alias.unwrap());
1236 match_invoice_routes(Some(2_000_000_000), &nodes[0], scid_aliases_2_000_000_000_msat);
1238 // An invoice with no specified amount should include all channels in the route hints.
1239 let mut scid_aliases_no_specified_amount = HashSet::new();
1240 scid_aliases_no_specified_amount.insert(chan_1_0.0.short_channel_id_alias.unwrap());
1241 scid_aliases_no_specified_amount.insert(chan_2_0.0.short_channel_id_alias.unwrap());
1243 match_invoice_routes(None, &nodes[0], scid_aliases_no_specified_amount);
1246 fn match_invoice_routes<'a, 'b: 'a, 'c: 'b>(
1247 invoice_amt: Option<u64>,
1248 invoice_node: &Node<'a, 'b, 'c>,
1249 mut chan_ids_to_match: HashSet<u64>
1251 let invoice = create_invoice_from_channelmanager_and_duration_since_epoch(
1252 invoice_node.node, invoice_node.keys_manager, invoice_node.logger,
1253 Currency::BitcoinTestnet, invoice_amt, "test".to_string(), Duration::from_secs(1234567),
1254 3600, None).unwrap();
1255 let hints = invoice.private_routes();
1258 let hint_short_chan_id = (hint.0).0[0].short_channel_id;
1259 assert!(chan_ids_to_match.remove(&hint_short_chan_id));
1261 assert!(chan_ids_to_match.is_empty(), "Unmatched short channel ids: {:?}", chan_ids_to_match);
1265 #[cfg(feature = "std")]
1266 fn test_multi_node_receive() {
1267 do_test_multi_node_receive(true);
1268 do_test_multi_node_receive(false);
1271 #[cfg(feature = "std")]
1272 fn do_test_multi_node_receive(user_generated_pmt_hash: bool) {
1273 let mut chanmon_cfgs = create_chanmon_cfgs(3);
1274 let seed_1 = [42u8; 32];
1275 let seed_2 = [43u8; 32];
1276 let cross_node_seed = [44u8; 32];
1277 chanmon_cfgs[1].keys_manager.backing = PhantomKeysManager::new(&seed_1, 43, 44, &cross_node_seed);
1278 chanmon_cfgs[2].keys_manager.backing = PhantomKeysManager::new(&seed_2, 43, 44, &cross_node_seed);
1279 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1280 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1281 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1282 let chan_0_1 = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 10001);
1283 nodes[0].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &chan_0_1.1);
1284 nodes[1].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &chan_0_1.0);
1285 let chan_0_2 = create_announced_chan_between_nodes_with_value(&nodes, 0, 2, 100000, 10001);
1286 nodes[0].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan_0_2.1);
1287 nodes[2].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &chan_0_2.0);
1289 let payment_amt = 10_000;
1290 let route_hints = vec![
1291 nodes[1].node.get_phantom_route_hints(),
1292 nodes[2].node.get_phantom_route_hints(),
1295 let user_payment_preimage = PaymentPreimage([1; 32]);
1296 let payment_hash = if user_generated_pmt_hash {
1297 Some(PaymentHash(Sha256::hash(&user_payment_preimage.0[..]).into_inner()))
1301 let genesis_timestamp = bitcoin::blockdata::constants::genesis_block(bitcoin::Network::Testnet).header.time as u64;
1302 let non_default_invoice_expiry_secs = 4200;
1305 crate::utils::create_phantom_invoice::<&test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestLogger>(
1306 Some(payment_amt), payment_hash, "test".to_string(), non_default_invoice_expiry_secs,
1307 route_hints, nodes[1].keys_manager, nodes[1].keys_manager, nodes[1].logger,
1308 Currency::BitcoinTestnet, None, Duration::from_secs(genesis_timestamp)
1310 let (payment_hash, payment_secret) = (PaymentHash(invoice.payment_hash().into_inner()), *invoice.payment_secret());
1311 let payment_preimage = if user_generated_pmt_hash {
1312 user_payment_preimage
1314 nodes[1].node.get_payment_preimage(payment_hash, payment_secret).unwrap()
1317 assert_eq!(invoice.min_final_cltv_expiry_delta(), MIN_FINAL_CLTV_EXPIRY_DELTA as u64);
1318 assert_eq!(invoice.description(), Bolt11InvoiceDescription::Direct(&Description("test".to_string())));
1319 assert_eq!(invoice.route_hints().len(), 2);
1320 assert_eq!(invoice.expiry_time(), Duration::from_secs(non_default_invoice_expiry_secs.into()));
1321 assert!(!invoice.features().unwrap().supports_basic_mpp());
1323 let payment_params = PaymentParameters::from_node_id(invoice.recover_payee_pub_key(),
1324 invoice.min_final_cltv_expiry_delta() as u32)
1325 .with_bolt11_features(invoice.features().unwrap().clone()).unwrap()
1326 .with_route_hints(invoice.route_hints()).unwrap();
1327 let params = RouteParameters::from_payment_params_and_value(
1328 payment_params, invoice.amount_milli_satoshis().unwrap());
1329 let (payment_event, fwd_idx) = {
1330 let mut payment_hash = PaymentHash([0; 32]);
1331 payment_hash.0.copy_from_slice(&invoice.payment_hash().as_ref()[0..32]);
1332 nodes[0].node.send_payment(payment_hash,
1333 RecipientOnionFields::secret_only(*invoice.payment_secret()),
1334 PaymentId(payment_hash.0), params, Retry::Attempts(0)).unwrap();
1335 let mut added_monitors = nodes[0].chain_monitor.added_monitors.lock().unwrap();
1336 assert_eq!(added_monitors.len(), 1);
1337 added_monitors.clear();
1339 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
1340 assert_eq!(events.len(), 1);
1341 let fwd_idx = match events[0] {
1342 MessageSendEvent::UpdateHTLCs { node_id, .. } => {
1343 if node_id == nodes[1].node.get_our_node_id() {
1347 _ => panic!("Unexpected event")
1349 (SendEvent::from_event(events.remove(0)), fwd_idx)
1351 nodes[fwd_idx].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
1352 commitment_signed_dance!(nodes[fwd_idx], nodes[0], &payment_event.commitment_msg, false, true);
1354 // Note that we have to "forward pending HTLCs" twice before we see the PaymentClaimable as
1355 // this "emulates" the payment taking two hops, providing some privacy to make phantom node
1356 // payments "look real" by taking more time.
1357 let other_events = RefCell::new(Vec::new());
1358 let forward_event_handler = |event: Event| {
1359 if let Event::PendingHTLCsForwardable { .. } = event {
1360 nodes[fwd_idx].node.process_pending_htlc_forwards();
1362 other_events.borrow_mut().push(event);
1365 nodes[fwd_idx].node.process_pending_events(&forward_event_handler);
1366 nodes[fwd_idx].node.process_pending_events(&forward_event_handler);
1368 let payment_preimage_opt = if user_generated_pmt_hash { None } else { Some(payment_preimage) };
1369 assert_eq!(other_events.borrow().len(), 1);
1370 check_payment_claimable(&other_events.borrow()[0], payment_hash, payment_secret, payment_amt, payment_preimage_opt, invoice.recover_payee_pub_key());
1371 do_claim_payment_along_route(&nodes[0], &[&vec!(&nodes[fwd_idx])[..]], false, payment_preimage);
1372 expect_payment_sent(&nodes[0], payment_preimage, None, true, true);
1376 #[cfg(feature = "std")]
1377 fn test_multi_node_hints_has_htlc_min_max_values() {
1378 let mut chanmon_cfgs = create_chanmon_cfgs(3);
1379 let seed_1 = [42u8; 32];
1380 let seed_2 = [43u8; 32];
1381 let cross_node_seed = [44u8; 32];
1382 chanmon_cfgs[1].keys_manager.backing = PhantomKeysManager::new(&seed_1, 43, 44, &cross_node_seed);
1383 chanmon_cfgs[2].keys_manager.backing = PhantomKeysManager::new(&seed_2, 43, 44, &cross_node_seed);
1384 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1385 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1386 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1388 create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 10001);
1389 create_unannounced_chan_between_nodes_with_value(&nodes, 0, 2, 100000, 10001);
1391 let payment_amt = 20_000;
1392 let (payment_hash, _payment_secret) = nodes[1].node.create_inbound_payment(Some(payment_amt), 3600, None).unwrap();
1393 let route_hints = vec![
1394 nodes[1].node.get_phantom_route_hints(),
1395 nodes[2].node.get_phantom_route_hints(),
1398 let invoice = crate::utils::create_phantom_invoice::<&test_utils::TestKeysInterface,
1399 &test_utils::TestKeysInterface, &test_utils::TestLogger>(Some(payment_amt), Some(payment_hash),
1400 "test".to_string(), 3600, route_hints, nodes[1].keys_manager, nodes[1].keys_manager,
1401 nodes[1].logger, Currency::BitcoinTestnet, None, Duration::from_secs(1234567)).unwrap();
1403 let chan_0_1 = &nodes[1].node.list_usable_channels()[0];
1404 assert_eq!(invoice.route_hints()[0].0[0].htlc_minimum_msat, chan_0_1.inbound_htlc_minimum_msat);
1405 assert_eq!(invoice.route_hints()[0].0[0].htlc_maximum_msat, chan_0_1.inbound_htlc_maximum_msat);
1407 let chan_0_2 = &nodes[2].node.list_usable_channels()[0];
1408 assert_eq!(invoice.route_hints()[1].0[0].htlc_minimum_msat, chan_0_2.inbound_htlc_minimum_msat);
1409 assert_eq!(invoice.route_hints()[1].0[0].htlc_maximum_msat, chan_0_2.inbound_htlc_maximum_msat);
1413 #[cfg(feature = "std")]
1414 fn create_phantom_invoice_with_description_hash() {
1415 let chanmon_cfgs = create_chanmon_cfgs(3);
1416 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1417 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1418 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1420 let payment_amt = 20_000;
1421 let route_hints = vec![
1422 nodes[1].node.get_phantom_route_hints(),
1423 nodes[2].node.get_phantom_route_hints(),
1426 let description_hash = crate::Sha256(Hash::hash("Description hash phantom invoice".as_bytes()));
1427 let non_default_invoice_expiry_secs = 4200;
1428 let invoice = crate::utils::create_phantom_invoice_with_description_hash::<
1429 &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestLogger,
1431 Some(payment_amt), None, non_default_invoice_expiry_secs, description_hash,
1432 route_hints, nodes[1].keys_manager, nodes[1].keys_manager, nodes[1].logger,
1433 Currency::BitcoinTestnet, None, Duration::from_secs(1234567),
1436 assert_eq!(invoice.amount_pico_btc(), Some(200_000));
1437 assert_eq!(invoice.min_final_cltv_expiry_delta(), MIN_FINAL_CLTV_EXPIRY_DELTA as u64);
1438 assert_eq!(invoice.expiry_time(), Duration::from_secs(non_default_invoice_expiry_secs.into()));
1439 assert_eq!(invoice.description(), Bolt11InvoiceDescription::Hash(&crate::Sha256(Sha256::hash("Description hash phantom invoice".as_bytes()))));
1443 #[cfg(feature = "std")]
1444 fn create_phantom_invoice_with_custom_payment_hash_and_custom_min_final_cltv_delta() {
1445 let chanmon_cfgs = create_chanmon_cfgs(3);
1446 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1447 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1448 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1450 let payment_amt = 20_000;
1451 let route_hints = vec![
1452 nodes[1].node.get_phantom_route_hints(),
1453 nodes[2].node.get_phantom_route_hints(),
1455 let user_payment_preimage = PaymentPreimage([1; 32]);
1456 let payment_hash = Some(PaymentHash(Sha256::hash(&user_payment_preimage.0[..]).into_inner()));
1457 let non_default_invoice_expiry_secs = 4200;
1458 let min_final_cltv_expiry_delta = Some(100);
1459 let duration_since_epoch = Duration::from_secs(1234567);
1460 let invoice = crate::utils::create_phantom_invoice::<&test_utils::TestKeysInterface,
1461 &test_utils::TestKeysInterface, &test_utils::TestLogger>(Some(payment_amt), payment_hash,
1462 "".to_string(), non_default_invoice_expiry_secs, route_hints, nodes[1].keys_manager, nodes[1].keys_manager,
1463 nodes[1].logger, Currency::BitcoinTestnet, min_final_cltv_expiry_delta, duration_since_epoch).unwrap();
1464 assert_eq!(invoice.amount_pico_btc(), Some(200_000));
1465 assert_eq!(invoice.min_final_cltv_expiry_delta(), (min_final_cltv_expiry_delta.unwrap() + 3) as u64);
1466 assert_eq!(invoice.expiry_time(), Duration::from_secs(non_default_invoice_expiry_secs.into()));
1470 #[cfg(feature = "std")]
1471 fn test_multi_node_hints_includes_single_channels_to_participating_nodes() {
1472 let mut chanmon_cfgs = create_chanmon_cfgs(3);
1473 let seed_1 = [42u8; 32];
1474 let seed_2 = [43u8; 32];
1475 let cross_node_seed = [44u8; 32];
1476 chanmon_cfgs[1].keys_manager.backing = PhantomKeysManager::new(&seed_1, 43, 44, &cross_node_seed);
1477 chanmon_cfgs[2].keys_manager.backing = PhantomKeysManager::new(&seed_2, 43, 44, &cross_node_seed);
1478 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1479 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1480 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1482 let chan_0_1 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 10001);
1483 let chan_0_2 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 2, 100000, 10001);
1485 let mut scid_aliases = HashSet::new();
1486 scid_aliases.insert(chan_0_1.0.short_channel_id_alias.unwrap());
1487 scid_aliases.insert(chan_0_2.0.short_channel_id_alias.unwrap());
1489 match_multi_node_invoice_routes(
1492 vec![&nodes[1], &nodes[2],],
1499 #[cfg(feature = "std")]
1500 fn test_multi_node_hints_includes_one_channel_of_each_counterparty_nodes_per_participating_node() {
1501 let mut chanmon_cfgs = create_chanmon_cfgs(4);
1502 let seed_1 = [42u8; 32];
1503 let seed_2 = [43u8; 32];
1504 let cross_node_seed = [44u8; 32];
1505 chanmon_cfgs[2].keys_manager.backing = PhantomKeysManager::new(&seed_1, 43, 44, &cross_node_seed);
1506 chanmon_cfgs[3].keys_manager.backing = PhantomKeysManager::new(&seed_2, 43, 44, &cross_node_seed);
1507 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
1508 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
1509 let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
1511 let chan_0_2 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 2, 100000, 10001);
1512 let chan_0_3 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 3, 1000000, 10001);
1513 let chan_1_3 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 3, 3_000_000, 10005);
1515 let mut scid_aliases = HashSet::new();
1516 scid_aliases.insert(chan_0_2.0.short_channel_id_alias.unwrap());
1517 scid_aliases.insert(chan_0_3.0.short_channel_id_alias.unwrap());
1518 scid_aliases.insert(chan_1_3.0.short_channel_id_alias.unwrap());
1520 match_multi_node_invoice_routes(
1523 vec![&nodes[2], &nodes[3],],
1530 #[cfg(feature = "std")]
1531 fn test_multi_node_forwarding_info_not_assigned_channel_excluded_from_hints() {
1532 let mut chanmon_cfgs = create_chanmon_cfgs(4);
1533 let seed_1 = [42u8; 32];
1534 let seed_2 = [43u8; 32];
1535 let cross_node_seed = [44u8; 32];
1536 chanmon_cfgs[2].keys_manager.backing = PhantomKeysManager::new(&seed_1, 43, 44, &cross_node_seed);
1537 chanmon_cfgs[3].keys_manager.backing = PhantomKeysManager::new(&seed_2, 43, 44, &cross_node_seed);
1538 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
1539 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
1540 let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
1542 let chan_0_2 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 2, 100000, 10001);
1543 let chan_0_3 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 3, 1000000, 10001);
1545 // Create an unannonced channel between `nodes[1]` and `nodes[3]`, for which the
1546 // `msgs::ChannelUpdate` is never handled for the node(s). As the `msgs::ChannelUpdate`
1547 // is never handled, the `channel.counterparty.forwarding_info` is never assigned.
1548 let mut private_chan_cfg = UserConfig::default();
1549 private_chan_cfg.channel_handshake_config.announced_channel = false;
1550 let temporary_channel_id = nodes[1].node.create_channel(nodes[3].node.get_our_node_id(), 1_000_000, 500_000_000, 42, Some(private_chan_cfg)).unwrap();
1551 let open_channel = get_event_msg!(nodes[1], MessageSendEvent::SendOpenChannel, nodes[3].node.get_our_node_id());
1552 nodes[3].node.handle_open_channel(&nodes[1].node.get_our_node_id(), &open_channel);
1553 let accept_channel = get_event_msg!(nodes[3], MessageSendEvent::SendAcceptChannel, nodes[1].node.get_our_node_id());
1554 nodes[1].node.handle_accept_channel(&nodes[3].node.get_our_node_id(), &accept_channel);
1556 let tx = sign_funding_transaction(&nodes[1], &nodes[3], 1_000_000, temporary_channel_id);
1558 let conf_height = core::cmp::max(nodes[1].best_block_info().1 + 1, nodes[3].best_block_info().1 + 1);
1559 confirm_transaction_at(&nodes[1], &tx, conf_height);
1560 connect_blocks(&nodes[1], CHAN_CONFIRM_DEPTH - 1);
1561 confirm_transaction_at(&nodes[3], &tx, conf_height);
1562 connect_blocks(&nodes[3], CHAN_CONFIRM_DEPTH - 1);
1563 let as_channel_ready = get_event_msg!(nodes[1], MessageSendEvent::SendChannelReady, nodes[3].node.get_our_node_id());
1564 nodes[1].node.handle_channel_ready(&nodes[3].node.get_our_node_id(), &get_event_msg!(nodes[3], MessageSendEvent::SendChannelReady, nodes[1].node.get_our_node_id()));
1565 get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[3].node.get_our_node_id());
1566 nodes[3].node.handle_channel_ready(&nodes[1].node.get_our_node_id(), &as_channel_ready);
1567 get_event_msg!(nodes[3], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
1568 expect_channel_ready_event(&nodes[1], &nodes[3].node.get_our_node_id());
1569 expect_channel_ready_event(&nodes[3], &nodes[1].node.get_our_node_id());
1571 // As `msgs::ChannelUpdate` was never handled for the participating node(s) of the third
1572 // channel, the channel will never be assigned any `counterparty.forwarding_info`.
1573 // Therefore only `chan_0_3` should be included in the hints for `nodes[3]`.
1574 let mut scid_aliases = HashSet::new();
1575 scid_aliases.insert(chan_0_2.0.short_channel_id_alias.unwrap());
1576 scid_aliases.insert(chan_0_3.0.short_channel_id_alias.unwrap());
1578 match_multi_node_invoice_routes(
1581 vec![&nodes[2], &nodes[3],],
1588 #[cfg(feature = "std")]
1589 fn test_multi_node_with_only_public_channels_hints_includes_only_phantom_route() {
1590 let mut chanmon_cfgs = create_chanmon_cfgs(3);
1591 let seed_1 = [42u8; 32];
1592 let seed_2 = [43u8; 32];
1593 let cross_node_seed = [44u8; 32];
1594 chanmon_cfgs[1].keys_manager.backing = PhantomKeysManager::new(&seed_1, 43, 44, &cross_node_seed);
1595 chanmon_cfgs[2].keys_manager.backing = PhantomKeysManager::new(&seed_2, 43, 44, &cross_node_seed);
1596 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1597 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1598 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1600 let chan_0_1 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 10001);
1602 let chan_2_0 = create_announced_chan_between_nodes_with_value(&nodes, 2, 0, 100000, 10001);
1603 nodes[2].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &chan_2_0.1);
1604 nodes[0].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan_2_0.0);
1606 // Hints should include `chan_0_1` from as `nodes[1]` only have private channels, but not
1607 // `chan_0_2` as `nodes[2]` only has public channels.
1608 let mut scid_aliases = HashSet::new();
1609 scid_aliases.insert(chan_0_1.0.short_channel_id_alias.unwrap());
1611 match_multi_node_invoice_routes(
1614 vec![&nodes[1], &nodes[2],],
1621 #[cfg(feature = "std")]
1622 fn test_multi_node_with_mixed_public_and_private_channel_hints_includes_only_phantom_route() {
1623 let mut chanmon_cfgs = create_chanmon_cfgs(4);
1624 let seed_1 = [42u8; 32];
1625 let seed_2 = [43u8; 32];
1626 let cross_node_seed = [44u8; 32];
1627 chanmon_cfgs[1].keys_manager.backing = PhantomKeysManager::new(&seed_1, 43, 44, &cross_node_seed);
1628 chanmon_cfgs[2].keys_manager.backing = PhantomKeysManager::new(&seed_2, 43, 44, &cross_node_seed);
1629 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
1630 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
1631 let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
1633 let chan_0_2 = create_announced_chan_between_nodes_with_value(&nodes, 0, 2, 100000, 10001);
1634 nodes[0].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan_0_2.1);
1635 nodes[2].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &chan_0_2.0);
1636 let _chan_1_2 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 2, 100000, 10001);
1638 let chan_0_3 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 3, 100000, 10001);
1640 // Hints should include `chan_0_3` from as `nodes[3]` only have private channels, and no
1641 // channels for `nodes[2]` as it contains a mix of public and private channels.
1642 let mut scid_aliases = HashSet::new();
1643 scid_aliases.insert(chan_0_3.0.short_channel_id_alias.unwrap());
1645 match_multi_node_invoice_routes(
1648 vec![&nodes[2], &nodes[3],],
1655 #[cfg(feature = "std")]
1656 fn test_multi_node_hints_has_only_lowest_inbound_channel_above_minimum() {
1657 let mut chanmon_cfgs = create_chanmon_cfgs(3);
1658 let seed_1 = [42u8; 32];
1659 let seed_2 = [43u8; 32];
1660 let cross_node_seed = [44u8; 32];
1661 chanmon_cfgs[1].keys_manager.backing = PhantomKeysManager::new(&seed_1, 43, 44, &cross_node_seed);
1662 chanmon_cfgs[2].keys_manager.backing = PhantomKeysManager::new(&seed_2, 43, 44, &cross_node_seed);
1663 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1664 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
1665 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1667 let _chan_0_1_below_amt = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 100_000, 0);
1668 let _chan_0_1_above_amt_high_inbound = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 500_000, 0);
1669 let chan_0_1_above_amt_low_inbound = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 1, 180_000, 0);
1670 let chan_0_2 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 2, 100000, 10001);
1672 let mut scid_aliases = HashSet::new();
1673 scid_aliases.insert(chan_0_1_above_amt_low_inbound.0.short_channel_id_alias.unwrap());
1674 scid_aliases.insert(chan_0_2.0.short_channel_id_alias.unwrap());
1676 match_multi_node_invoice_routes(
1679 vec![&nodes[1], &nodes[2],],
1686 #[cfg(feature = "std")]
1687 fn test_multi_node_channels_inbound_capacity_lower_than_invoice_amt_filtering() {
1688 let mut chanmon_cfgs = create_chanmon_cfgs(4);
1689 let seed_1 = [42u8; 32];
1690 let seed_2 = [43u8; 32];
1691 let cross_node_seed = [44u8; 32];
1692 chanmon_cfgs[1].keys_manager.backing = PhantomKeysManager::new(&seed_1, 43, 44, &cross_node_seed);
1693 chanmon_cfgs[2].keys_manager.backing = PhantomKeysManager::new(&seed_2, 43, 44, &cross_node_seed);
1694 let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
1695 let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
1696 let nodes = create_network(4, &node_cfgs, &node_chanmgrs);
1698 let chan_0_2 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 2, 1_000_000, 0);
1699 let chan_0_3 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 3, 100_000, 0);
1700 let chan_1_3 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 3, 200_000, 0);
1702 // Since the invoice 1 msat above chan_0_3's inbound capacity, it should be filtered out.
1703 let mut scid_aliases_99_000_001_msat = HashSet::new();
1704 scid_aliases_99_000_001_msat.insert(chan_0_2.0.short_channel_id_alias.unwrap());
1705 scid_aliases_99_000_001_msat.insert(chan_1_3.0.short_channel_id_alias.unwrap());
1707 match_multi_node_invoice_routes(
1710 vec![&nodes[2], &nodes[3],],
1711 scid_aliases_99_000_001_msat,
1715 // Since the invoice is exactly at chan_0_3's inbound capacity, it should be included.
1716 let mut scid_aliases_99_000_000_msat = HashSet::new();
1717 scid_aliases_99_000_000_msat.insert(chan_0_2.0.short_channel_id_alias.unwrap());
1718 scid_aliases_99_000_000_msat.insert(chan_0_3.0.short_channel_id_alias.unwrap());
1719 scid_aliases_99_000_000_msat.insert(chan_1_3.0.short_channel_id_alias.unwrap());
1721 match_multi_node_invoice_routes(
1724 vec![&nodes[2], &nodes[3],],
1725 scid_aliases_99_000_000_msat,
1729 // Since the invoice is above all of `nodes[2]` channels' inbound capacity, all of
1730 // `nodes[2]` them should be included.
1731 let mut scid_aliases_300_000_000_msat = HashSet::new();
1732 scid_aliases_300_000_000_msat.insert(chan_0_2.0.short_channel_id_alias.unwrap());
1733 scid_aliases_300_000_000_msat.insert(chan_0_3.0.short_channel_id_alias.unwrap());
1734 scid_aliases_300_000_000_msat.insert(chan_1_3.0.short_channel_id_alias.unwrap());
1736 match_multi_node_invoice_routes(
1739 vec![&nodes[2], &nodes[3],],
1740 scid_aliases_300_000_000_msat,
1744 // Since the no specified amount, all channels should included.
1745 let mut scid_aliases_no_specified_amount = HashSet::new();
1746 scid_aliases_no_specified_amount.insert(chan_0_2.0.short_channel_id_alias.unwrap());
1747 scid_aliases_no_specified_amount.insert(chan_0_3.0.short_channel_id_alias.unwrap());
1748 scid_aliases_no_specified_amount.insert(chan_1_3.0.short_channel_id_alias.unwrap());
1750 match_multi_node_invoice_routes(
1753 vec![&nodes[2], &nodes[3],],
1754 scid_aliases_no_specified_amount,
1760 fn test_multi_node_hints_limited_to_3() {
1761 let mut chanmon_cfgs = create_chanmon_cfgs(6);
1762 let seed_1 = [42 as u8; 32];
1763 let seed_2 = [43 as u8; 32];
1764 let seed_3 = [44 as u8; 32];
1765 let seed_4 = [45 as u8; 32];
1766 let cross_node_seed = [44 as u8; 32];
1767 chanmon_cfgs[2].keys_manager.backing = PhantomKeysManager::new(&seed_1, 43, 44, &cross_node_seed);
1768 chanmon_cfgs[3].keys_manager.backing = PhantomKeysManager::new(&seed_2, 43, 44, &cross_node_seed);
1769 chanmon_cfgs[4].keys_manager.backing = PhantomKeysManager::new(&seed_3, 43, 44, &cross_node_seed);
1770 chanmon_cfgs[5].keys_manager.backing = PhantomKeysManager::new(&seed_4, 43, 44, &cross_node_seed);
1771 let node_cfgs = create_node_cfgs(6, &chanmon_cfgs);
1772 let node_chanmgrs = create_node_chanmgrs(6, &node_cfgs, &[None, None, None, None, None, None]);
1773 let nodes = create_network(6, &node_cfgs, &node_chanmgrs);
1775 // Setup each phantom node with two channels from distinct peers.
1776 let chan_0_2 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 2, 10_000, 0);
1777 let chan_1_2 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 2, 20_000, 0);
1778 let chan_0_3 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 3, 20_000, 0);
1779 let _chan_1_3 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 3, 10_000, 0);
1780 let chan_0_4 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 4, 20_000, 0);
1781 let _chan_1_4 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 4, 10_000, 0);
1782 let _chan_0_5 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 5, 20_000, 0);
1783 let _chan_1_5 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 5, 10_000, 0);
1785 // Set invoice amount > all channels inbound so that every one is eligible for inclusion
1786 // and hints will be sorted by largest inbound capacity.
1787 let invoice_amt = Some(100_000_000);
1789 // With 4 phantom nodes, assert that we include 1 hint per node, up to 3 nodes.
1790 let mut scid_aliases = HashSet::new();
1791 scid_aliases.insert(chan_1_2.0.short_channel_id_alias.unwrap());
1792 scid_aliases.insert(chan_0_3.0.short_channel_id_alias.unwrap());
1793 scid_aliases.insert(chan_0_4.0.short_channel_id_alias.unwrap());
1795 match_multi_node_invoice_routes(
1798 vec![&nodes[2], &nodes[3], &nodes[4], &nodes[5]],
1803 // With 2 phantom nodes, assert that we include no more than 3 hints.
1804 let mut scid_aliases = HashSet::new();
1805 scid_aliases.insert(chan_1_2.0.short_channel_id_alias.unwrap());
1806 scid_aliases.insert(chan_0_3.0.short_channel_id_alias.unwrap());
1807 scid_aliases.insert(chan_0_2.0.short_channel_id_alias.unwrap());
1809 match_multi_node_invoice_routes(
1812 vec![&nodes[2], &nodes[3]],
1819 fn test_multi_node_hints_at_least_3() {
1820 let mut chanmon_cfgs = create_chanmon_cfgs(5);
1821 let seed_1 = [42 as u8; 32];
1822 let seed_2 = [43 as u8; 32];
1823 let cross_node_seed = [44 as u8; 32];
1824 chanmon_cfgs[1].keys_manager.backing = PhantomKeysManager::new(&seed_1, 43, 44, &cross_node_seed);
1825 chanmon_cfgs[2].keys_manager.backing = PhantomKeysManager::new(&seed_2, 43, 44, &cross_node_seed);
1826 let node_cfgs = create_node_cfgs(5, &chanmon_cfgs);
1827 let node_chanmgrs = create_node_chanmgrs(5, &node_cfgs, &[None, None, None, None, None]);
1828 let nodes = create_network(5, &node_cfgs, &node_chanmgrs);
1830 let _chan_0_3 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 3, 10_000, 0);
1831 let chan_1_3 = create_unannounced_chan_between_nodes_with_value(&nodes, 1, 3, 20_000, 0);
1832 let chan_2_3 = create_unannounced_chan_between_nodes_with_value(&nodes, 2, 3, 30_000, 0);
1833 let chan_0_4 = create_unannounced_chan_between_nodes_with_value(&nodes, 0, 4, 10_000, 0);
1835 // Since the invoice amount is above all channels inbound, all four are eligible. Test that
1836 // we still include 3 hints from 2 distinct nodes sorted by inbound.
1837 let mut scid_aliases = HashSet::new();
1838 scid_aliases.insert(chan_1_3.0.short_channel_id_alias.unwrap());
1839 scid_aliases.insert(chan_2_3.0.short_channel_id_alias.unwrap());
1840 scid_aliases.insert(chan_0_4.0.short_channel_id_alias.unwrap());
1842 match_multi_node_invoice_routes(
1845 vec![&nodes[3], &nodes[4],],
1851 fn match_multi_node_invoice_routes<'a, 'b: 'a, 'c: 'b>(
1852 invoice_amt: Option<u64>,
1853 invoice_node: &Node<'a, 'b, 'c>,
1854 network_multi_nodes: Vec<&Node<'a, 'b, 'c>>,
1855 mut chan_ids_to_match: HashSet<u64>,
1856 nodes_contains_public_channels: bool
1858 let phantom_route_hints = network_multi_nodes.iter()
1859 .map(|node| node.node.get_phantom_route_hints())
1860 .collect::<Vec<PhantomRouteHints>>();
1861 let phantom_scids = phantom_route_hints.iter()
1862 .map(|route_hint| route_hint.phantom_scid)
1863 .collect::<HashSet<u64>>();
1865 let invoice = crate::utils::create_phantom_invoice::<&test_utils::TestKeysInterface,
1866 &test_utils::TestKeysInterface, &test_utils::TestLogger>(invoice_amt, None, "test".to_string(),
1867 3600, phantom_route_hints, invoice_node.keys_manager, invoice_node.keys_manager,
1868 invoice_node.logger, Currency::BitcoinTestnet, None, Duration::from_secs(1234567)).unwrap();
1870 let invoice_hints = invoice.private_routes();
1872 for hint in invoice_hints {
1873 let hints = &(hint.0).0;
1876 assert!(nodes_contains_public_channels);
1877 let phantom_scid = hints[0].short_channel_id;
1878 assert!(phantom_scids.contains(&phantom_scid));
1881 let hint_short_chan_id = hints[0].short_channel_id;
1882 assert!(chan_ids_to_match.remove(&hint_short_chan_id));
1883 let phantom_scid = hints[1].short_channel_id;
1884 assert!(phantom_scids.contains(&phantom_scid));
1886 _ => panic!("Incorrect hint length generated")
1889 assert!(chan_ids_to_match.is_empty(), "Unmatched short channel ids: {:?}", chan_ids_to_match);
1893 fn test_create_invoice_fails_with_invalid_custom_min_final_cltv_expiry_delta() {
1894 let chanmon_cfgs = create_chanmon_cfgs(2);
1895 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1896 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
1897 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1898 let result = crate::utils::create_invoice_from_channelmanager_and_duration_since_epoch(
1899 nodes[1].node, nodes[1].keys_manager, nodes[1].logger, Currency::BitcoinTestnet,
1900 Some(10_000), "Some description".into(), Duration::from_secs(1234567), 3600, Some(MIN_FINAL_CLTV_EXPIRY_DELTA - 4),
1903 Err(SignOrCreationError::CreationError(CreationError::MinFinalCltvExpiryDeltaTooShort)) => {},
1909 fn test_rotate_through_iterators() {
1910 // two nested vectors
1911 let a = vec![vec!["a0", "b0", "c0"].into_iter(), vec!["a1", "b1"].into_iter()];
1912 let result = rotate_through_iterators(a).collect::<Vec<_>>();
1914 let expected = vec!["a0", "a1", "b0", "b1", "c0"];
1915 assert_eq!(expected, result);
1917 // test single nested vector
1918 let a = vec![vec!["a0", "b0", "c0"].into_iter()];
1919 let result = rotate_through_iterators(a).collect::<Vec<_>>();
1921 let expected = vec!["a0", "b0", "c0"];
1922 assert_eq!(expected, result);
1924 // test second vector with only one element
1925 let a = vec![vec!["a0", "b0", "c0"].into_iter(), vec!["a1"].into_iter()];
1926 let result = rotate_through_iterators(a).collect::<Vec<_>>();
1928 let expected = vec!["a0", "a1", "b0", "c0"];
1929 assert_eq!(expected, result);
1931 // test three nestend vectors
1932 let a = vec![vec!["a0"].into_iter(), vec!["a1", "b1", "c1"].into_iter(), vec!["a2"].into_iter()];
1933 let result = rotate_through_iterators(a).collect::<Vec<_>>();
1935 let expected = vec!["a0", "a1", "a2", "b1", "c1"];
1936 assert_eq!(expected, result);
1938 // test single nested vector with a single value
1939 let a = vec![vec!["a0"].into_iter()];
1940 let result = rotate_through_iterators(a).collect::<Vec<_>>();
1942 let expected = vec!["a0"];
1943 assert_eq!(expected, result);
1945 // test single empty nested vector
1946 let a:Vec<std::vec::IntoIter<&str>> = vec![vec![].into_iter()];
1947 let result = rotate_through_iterators(a).collect::<Vec<&str>>();
1948 let expected:Vec<&str> = vec![];
1950 assert_eq!(expected, result);
1952 // test first nested vector is empty
1953 let a:Vec<std::vec::IntoIter<&str>>= vec![vec![].into_iter(), vec!["a1", "b1", "c1"].into_iter()];
1954 let result = rotate_through_iterators(a).collect::<Vec<&str>>();
1956 let expected = vec!["a1", "b1", "c1"];
1957 assert_eq!(expected, result);
1959 // test two empty vectors
1960 let a:Vec<std::vec::IntoIter<&str>> = vec![vec![].into_iter(), vec![].into_iter()];
1961 let result = rotate_through_iterators(a).collect::<Vec<&str>>();
1963 let expected:Vec<&str> = vec![];
1964 assert_eq!(expected, result);
1966 // test an empty vector amongst other filled vectors
1968 vec!["a0", "b0", "c0"].into_iter(),
1970 vec!["a1", "b1", "c1"].into_iter(),
1971 vec!["a2", "b2", "c2"].into_iter(),
1973 let result = rotate_through_iterators(a).collect::<Vec<_>>();
1975 let expected = vec!["a0", "a1", "a2", "b0", "b1", "b2", "c0", "c1", "c2"];
1976 assert_eq!(expected, result);
1978 // test a filled vector between two empty vectors
1979 let a = vec![vec![].into_iter(), vec!["a1", "b1", "c1"].into_iter(), vec![].into_iter()];
1980 let result = rotate_through_iterators(a).collect::<Vec<_>>();
1982 let expected = vec!["a1", "b1", "c1"];
1983 assert_eq!(expected, result);
1985 // test an empty vector at the end of the vectors
1986 let a = vec![vec!["a0", "b0", "c0"].into_iter(), vec![].into_iter()];
1987 let result = rotate_through_iterators(a).collect::<Vec<_>>();
1989 let expected = vec!["a0", "b0", "c0"];
1990 assert_eq!(expected, result);
1992 // test multiple empty vectors amongst multiple filled vectors
1995 vec!["a1", "b1", "c1"].into_iter(),
1997 vec!["a3", "b3"].into_iter(),
2001 let result = rotate_through_iterators(a).collect::<Vec<_>>();
2003 let expected = vec!["a1", "a3", "b1", "b3", "c1"];
2004 assert_eq!(expected, result);
2006 // test one element in the first nested vectore and two elements in the second nested
2008 let a = vec![vec!["a0"].into_iter(), vec!["a1", "b1"].into_iter()];
2009 let result = rotate_through_iterators(a).collect::<Vec<_>>();
2011 let expected = vec!["a0", "a1", "b1"];
2012 assert_eq!(expected, result);