1 //! The top-level routing/network map tracking logic lives here.
3 //! You probably want to create a NetGraphMsgHandler and use that as your RoutingMessageHandler and then
4 //! interrogate it to get routes for your own payments.
6 use bitcoin::secp256k1::key::PublicKey;
8 use ln::channelmanager;
9 use ln::features::{ChannelFeatures, NodeFeatures};
10 use ln::msgs::{DecodeError,ErrorAction,LightningError};
11 use routing::network_graph::{NetworkGraph, RoutingFees};
12 use util::ser::{Writeable, Readable};
13 use util::logger::Logger;
16 use std::collections::{HashMap,BinaryHeap};
20 #[derive(Clone, PartialEq)]
22 /// The node_id of the node at this hop.
23 pub pubkey: PublicKey,
24 /// The node_announcement features of the node at this hop. For the last hop, these may be
25 /// amended to match the features present in the invoice this node generated.
26 pub node_features: NodeFeatures,
27 /// The channel that should be used from the previous hop to reach this node.
28 pub short_channel_id: u64,
29 /// The channel_announcement features of the channel that should be used from the previous hop
30 /// to reach this node.
31 pub channel_features: ChannelFeatures,
32 /// The fee taken on this hop. For the last hop, this should be the full value of the payment.
34 /// The CLTV delta added for this hop. For the last hop, this should be the full CLTV value
35 /// expected at the destination, in excess of the current block height.
36 pub cltv_expiry_delta: u32,
39 impl Writeable for Vec<RouteHop> {
40 fn write<W: ::util::ser::Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
41 (self.len() as u8).write(writer)?;
42 for hop in self.iter() {
43 hop.pubkey.write(writer)?;
44 hop.node_features.write(writer)?;
45 hop.short_channel_id.write(writer)?;
46 hop.channel_features.write(writer)?;
47 hop.fee_msat.write(writer)?;
48 hop.cltv_expiry_delta.write(writer)?;
54 impl Readable for Vec<RouteHop> {
55 fn read<R: ::std::io::Read>(reader: &mut R) -> Result<Vec<RouteHop>, DecodeError> {
56 let hops_count: u8 = Readable::read(reader)?;
57 let mut hops = Vec::with_capacity(hops_count as usize);
58 for _ in 0..hops_count {
60 pubkey: Readable::read(reader)?,
61 node_features: Readable::read(reader)?,
62 short_channel_id: Readable::read(reader)?,
63 channel_features: Readable::read(reader)?,
64 fee_msat: Readable::read(reader)?,
65 cltv_expiry_delta: Readable::read(reader)?,
72 /// A route directs a payment from the sender (us) to the recipient. If the recipient supports MPP,
73 /// it can take multiple paths. Each path is composed of one or more hops through the network.
74 #[derive(Clone, PartialEq)]
76 /// The list of routes taken for a single (potentially-)multi-part payment. The pubkey of the
77 /// last RouteHop in each path must be the same.
78 /// Each entry represents a list of hops, NOT INCLUDING our own, where the last hop is the
79 /// destination. Thus, this must always be at least length one. While the maximum length of any
80 /// given path is variable, keeping the length of any path to less than 20 should currently
81 /// ensure it is viable.
82 pub paths: Vec<Vec<RouteHop>>,
85 impl Writeable for Route {
86 fn write<W: ::util::ser::Writer>(&self, writer: &mut W) -> Result<(), ::std::io::Error> {
87 (self.paths.len() as u64).write(writer)?;
88 for hops in self.paths.iter() {
95 impl Readable for Route {
96 fn read<R: ::std::io::Read>(reader: &mut R) -> Result<Route, DecodeError> {
97 let path_count: u64 = Readable::read(reader)?;
98 let mut paths = Vec::with_capacity(cmp::min(path_count, 128) as usize);
99 for _ in 0..path_count {
100 paths.push(Readable::read(reader)?);
106 /// A channel descriptor which provides a last-hop route to get_route
107 pub struct RouteHint {
108 /// The node_id of the non-target end of the route
109 pub src_node_id: PublicKey,
110 /// The short_channel_id of this channel
111 pub short_channel_id: u64,
112 /// The fees which must be paid to use this channel
113 pub fees: RoutingFees,
114 /// The difference in CLTV values between this node and the next node.
115 pub cltv_expiry_delta: u16,
116 /// The minimum value, in msat, which must be relayed to the next hop.
117 pub htlc_minimum_msat: u64,
120 #[derive(Eq, PartialEq)]
121 struct RouteGraphNode {
123 lowest_fee_to_peer_through_node: u64,
124 lowest_fee_to_node: u64,
127 impl cmp::Ord for RouteGraphNode {
128 fn cmp(&self, other: &RouteGraphNode) -> cmp::Ordering {
129 other.lowest_fee_to_peer_through_node.cmp(&self.lowest_fee_to_peer_through_node)
130 .then_with(|| other.pubkey.serialize().cmp(&self.pubkey.serialize()))
134 impl cmp::PartialOrd for RouteGraphNode {
135 fn partial_cmp(&self, other: &RouteGraphNode) -> Option<cmp::Ordering> {
136 Some(self.cmp(other))
140 struct DummyDirectionalChannelInfo {
141 cltv_expiry_delta: u32,
142 htlc_minimum_msat: u64,
147 /// Gets a route from us (as specified in the provided NetworkGraph) to the given target node.
149 /// Extra routing hops between known nodes and the target will be used if they are included in
152 /// If some channels aren't announced, it may be useful to fill in a first_hops with the
153 /// results from a local ChannelManager::list_usable_channels() call. If it is filled in, our
154 /// view of our local channels (from net_graph_msg_handler) will be ignored, and only those in first_hops
157 /// Panics if first_hops contains channels without short_channel_ids
158 /// (ChannelManager::list_usable_channels will never include such channels).
160 /// The fees on channels from us to next-hops are ignored (as they are assumed to all be
161 /// equal), however the enabled/disabled bit on such channels as well as the htlc_minimum_msat
162 /// *is* checked as they may change based on the receiving node.
163 pub fn get_route<L: Deref>(our_node_id: &PublicKey, network: &NetworkGraph, target: &PublicKey, first_hops: Option<&[channelmanager::ChannelDetails]>,
164 last_hops: &[RouteHint], final_value_msat: u64, final_cltv: u32, logger: L) -> Result<Route, LightningError> where L::Target: Logger {
165 // TODO: Obviously *only* using total fee cost sucks. We should consider weighting by
166 // uptime/success in using a node in the past.
167 if *target == *our_node_id {
168 return Err(LightningError{err: "Cannot generate a route to ourselves", action: ErrorAction::IgnoreError});
171 if final_value_msat > 21_000_000 * 1_0000_0000 * 1000 {
172 return Err(LightningError{err: "Cannot generate a route of more value than all existing satoshis", action: ErrorAction::IgnoreError});
175 // We do a dest-to-source Dijkstra's sorting by each node's distance from the destination
176 // plus the minimum per-HTLC fee to get from it to another node (aka "shitty A*").
177 // TODO: There are a few tweaks we could do, including possibly pre-calculating more stuff
178 // to use as the A* heuristic beyond just the cost to get one node further than the current
181 let dummy_directional_info = DummyDirectionalChannelInfo { // used for first_hops routes
182 cltv_expiry_delta: 0,
183 htlc_minimum_msat: 0,
186 proportional_millionths: 0,
190 let mut targets = BinaryHeap::new(); //TODO: Do we care about switching to eg Fibbonaci heap?
191 let mut dist = HashMap::with_capacity(network.get_nodes().len());
193 let mut first_hop_targets = HashMap::with_capacity(if first_hops.is_some() { first_hops.as_ref().unwrap().len() } else { 0 });
194 if let Some(hops) = first_hops {
196 let short_channel_id = chan.short_channel_id.expect("first_hops should be filled in with usable channels, not pending ones");
197 if chan.remote_network_id == *target {
199 paths: vec![vec![RouteHop {
200 pubkey: chan.remote_network_id,
201 node_features: chan.counterparty_features.to_context(),
203 channel_features: chan.counterparty_features.to_context(),
204 fee_msat: final_value_msat,
205 cltv_expiry_delta: final_cltv,
209 first_hop_targets.insert(chan.remote_network_id, (short_channel_id, chan.counterparty_features.clone()));
211 if first_hop_targets.is_empty() {
212 return Err(LightningError{err: "Cannot route when there are no outbound routes away from us", action: ErrorAction::IgnoreError});
216 macro_rules! add_entry {
217 // Adds entry which goes from $src_node_id to $dest_node_id
218 // over the channel with id $chan_id with fees described in
219 // $directional_info.
220 ( $chan_id: expr, $src_node_id: expr, $dest_node_id: expr, $directional_info: expr, $chan_features: expr, $starting_fee_msat: expr ) => {
221 //TODO: Explore simply adding fee to hit htlc_minimum_msat
222 if $starting_fee_msat as u64 + final_value_msat >= $directional_info.htlc_minimum_msat {
223 let proportional_fee_millions = ($starting_fee_msat + final_value_msat).checked_mul($directional_info.fees.proportional_millionths as u64);
224 if let Some(new_fee) = proportional_fee_millions.and_then(|part| {
225 ($directional_info.fees.base_msat as u64).checked_add(part / 1000000) })
227 let mut total_fee = $starting_fee_msat as u64;
228 let hm_entry = dist.entry(&$src_node_id);
229 let old_entry = hm_entry.or_insert_with(|| {
230 let node = network.get_nodes().get(&$src_node_id).unwrap();
231 let mut fee_base_msat = u32::max_value();
232 let mut fee_proportional_millionths = u32::max_value();
233 if let Some(fees) = node.lowest_inbound_channel_fees {
234 fee_base_msat = fees.base_msat;
235 fee_proportional_millionths = fees.proportional_millionths;
239 fee_proportional_millionths,
241 pubkey: $dest_node_id.clone(),
242 node_features: NodeFeatures::empty(),
244 channel_features: $chan_features.clone(),
246 cltv_expiry_delta: 0,
249 if $src_node_id != *our_node_id {
250 // Ignore new_fee for channel-from-us as we assume all channels-from-us
251 // will have the same effective-fee
252 total_fee += new_fee;
253 if let Some(fee_inc) = final_value_msat.checked_add(total_fee).and_then(|inc| { (old_entry.2 as u64).checked_mul(inc) }) {
254 total_fee += fee_inc / 1000000 + (old_entry.1 as u64);
256 // max_value means we'll always fail the old_entry.0 > total_fee check
257 total_fee = u64::max_value();
260 let new_graph_node = RouteGraphNode {
261 pubkey: $src_node_id,
262 lowest_fee_to_peer_through_node: total_fee,
263 lowest_fee_to_node: $starting_fee_msat as u64 + new_fee,
265 if old_entry.0 > total_fee {
266 targets.push(new_graph_node);
267 old_entry.0 = total_fee;
268 old_entry.3 = RouteHop {
269 pubkey: $dest_node_id.clone(),
270 node_features: NodeFeatures::empty(),
271 short_channel_id: $chan_id.clone(),
272 channel_features: $chan_features.clone(),
273 fee_msat: new_fee, // This field is ignored on the last-hop anyway
274 cltv_expiry_delta: $directional_info.cltv_expiry_delta as u32,
282 macro_rules! add_entries_to_cheapest_to_target_node {
283 ( $node: expr, $node_id: expr, $fee_to_target_msat: expr ) => {
284 if first_hops.is_some() {
285 if let Some(&(ref first_hop, ref features)) = first_hop_targets.get(&$node_id) {
286 add_entry!(first_hop, *our_node_id, $node_id, dummy_directional_info, features.to_context(), $fee_to_target_msat);
291 if let Some(node_info) = $node.announcement_info.as_ref() {
292 features = node_info.features.clone();
294 features = NodeFeatures::empty();
297 if !features.requires_unknown_bits() {
298 for chan_id in $node.channels.iter() {
299 let chan = network.get_channels().get(chan_id).unwrap();
300 if !chan.features.requires_unknown_bits() {
301 if chan.node_one == *$node_id {
302 // ie $node is one, ie next hop in A* is two, via the two_to_one channel
303 if first_hops.is_none() || chan.node_two != *our_node_id {
304 if let Some(two_to_one) = chan.two_to_one.as_ref() {
305 if two_to_one.enabled {
306 add_entry!(chan_id, chan.node_two, chan.node_one, two_to_one, chan.features, $fee_to_target_msat);
311 if first_hops.is_none() || chan.node_one != *our_node_id {
312 if let Some(one_to_two) = chan.one_to_two.as_ref() {
313 if one_to_two.enabled {
314 add_entry!(chan_id, chan.node_one, chan.node_two, one_to_two, chan.features, $fee_to_target_msat);
326 match network.get_nodes().get(target) {
329 add_entries_to_cheapest_to_target_node!(node, target, 0);
333 for hop in last_hops.iter() {
334 if first_hops.is_none() || hop.src_node_id != *our_node_id { // first_hop overrules last_hops
335 if network.get_nodes().get(&hop.src_node_id).is_some() {
336 if first_hops.is_some() {
337 if let Some(&(ref first_hop, ref features)) = first_hop_targets.get(&hop.src_node_id) {
338 // Currently there are no channel-context features defined, so we are a
339 // bit lazy here. In the future, we should pull them out via our
340 // ChannelManager, but there's no reason to waste the space until we
342 add_entry!(first_hop, *our_node_id , hop.src_node_id, dummy_directional_info, features.to_context(), 0);
345 // BOLT 11 doesn't allow inclusion of features for the last hop hints, which
346 // really sucks, cause we're gonna need that eventually.
347 add_entry!(hop.short_channel_id, hop.src_node_id, target, hop, ChannelFeatures::empty(), 0);
352 while let Some(RouteGraphNode { pubkey, lowest_fee_to_node, .. }) = targets.pop() {
353 if pubkey == *our_node_id {
354 let mut res = vec!(dist.remove(&our_node_id).unwrap().3);
356 if let Some(&(_, ref features)) = first_hop_targets.get(&res.last().unwrap().pubkey) {
357 res.last_mut().unwrap().node_features = features.to_context();
358 } else if let Some(node) = network.get_nodes().get(&res.last().unwrap().pubkey) {
359 if let Some(node_info) = node.announcement_info.as_ref() {
360 res.last_mut().unwrap().node_features = node_info.features.clone();
362 res.last_mut().unwrap().node_features = NodeFeatures::empty();
365 // We should be able to fill in features for everything except the last
366 // hop, if the last hop was provided via a BOLT 11 invoice (though we
367 // should be able to extend it further as BOLT 11 does have feature
368 // flags for the last hop node itself).
369 assert!(res.last().unwrap().pubkey == *target);
371 if res.last().unwrap().pubkey == *target {
375 let new_entry = match dist.remove(&res.last().unwrap().pubkey) {
377 None => return Err(LightningError{err: "Failed to find a non-fee-overflowing path to the given destination", action: ErrorAction::IgnoreError}),
379 res.last_mut().unwrap().fee_msat = new_entry.fee_msat;
380 res.last_mut().unwrap().cltv_expiry_delta = new_entry.cltv_expiry_delta;
383 res.last_mut().unwrap().fee_msat = final_value_msat;
384 res.last_mut().unwrap().cltv_expiry_delta = final_cltv;
385 let route = Route { paths: vec![res] };
386 log_trace!(logger, "Got route: {}", log_route!(route));
390 match network.get_nodes().get(&pubkey) {
393 add_entries_to_cheapest_to_target_node!(node, &pubkey, lowest_fee_to_node);
398 Err(LightningError{err: "Failed to find a path to the given destination", action: ErrorAction::IgnoreError})
403 use chain::chaininterface;
404 use routing::router::{get_route, RouteHint, RoutingFees};
405 use routing::network_graph::NetGraphMsgHandler;
406 use ln::features::{ChannelFeatures, InitFeatures, NodeFeatures};
407 use ln::msgs::{ErrorAction, LightningError, UnsignedChannelAnnouncement, ChannelAnnouncement, RoutingMessageHandler,
408 NodeAnnouncement, UnsignedNodeAnnouncement, ChannelUpdate, UnsignedChannelUpdate};
409 use ln::channelmanager;
410 use util::test_utils;
411 use util::ser::Writeable;
413 use bitcoin::hashes::sha256d::Hash as Sha256dHash;
414 use bitcoin::hashes::Hash;
415 use bitcoin::network::constants::Network;
416 use bitcoin::blockdata::constants::genesis_block;
417 use bitcoin::util::hash::BitcoinHash;
421 use bitcoin::secp256k1::key::{PublicKey,SecretKey};
422 use bitcoin::secp256k1::{Secp256k1, All};
426 // Using the same keys for LN and BTC ids
427 fn add_channel(net_graph_msg_handler: &NetGraphMsgHandler<Arc<chaininterface::ChainWatchInterfaceUtil>, Arc<test_utils::TestLogger>>, secp_ctx: &Secp256k1<All>, node_1_privkey: &SecretKey,
428 node_2_privkey: &SecretKey, features: ChannelFeatures, short_channel_id: u64) {
429 let node_id_1 = PublicKey::from_secret_key(&secp_ctx, node_1_privkey);
430 let node_id_2 = PublicKey::from_secret_key(&secp_ctx, node_2_privkey);
432 let unsigned_announcement = UnsignedChannelAnnouncement {
434 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
438 bitcoin_key_1: node_id_1,
439 bitcoin_key_2: node_id_2,
440 excess_data: Vec::new(),
443 let msghash = hash_to_message!(&Sha256dHash::hash(&unsigned_announcement.encode()[..])[..]);
444 let valid_announcement = ChannelAnnouncement {
445 node_signature_1: secp_ctx.sign(&msghash, node_1_privkey),
446 node_signature_2: secp_ctx.sign(&msghash, node_2_privkey),
447 bitcoin_signature_1: secp_ctx.sign(&msghash, node_1_privkey),
448 bitcoin_signature_2: secp_ctx.sign(&msghash, node_2_privkey),
449 contents: unsigned_announcement.clone(),
451 match net_graph_msg_handler.handle_channel_announcement(&valid_announcement) {
452 Ok(res) => assert!(res),
457 fn update_channel(net_graph_msg_handler: &NetGraphMsgHandler<Arc<chaininterface::ChainWatchInterfaceUtil>, Arc<test_utils::TestLogger>>, secp_ctx: &Secp256k1<All>, node_privkey: &SecretKey, update: UnsignedChannelUpdate) {
458 let msghash = hash_to_message!(&Sha256dHash::hash(&update.encode()[..])[..]);
459 let valid_channel_update = ChannelUpdate {
460 signature: secp_ctx.sign(&msghash, node_privkey),
461 contents: update.clone()
464 match net_graph_msg_handler.handle_channel_update(&valid_channel_update) {
465 Ok(res) => assert!(res),
466 // Err(_) => panic!()
467 Err(e) => println!("{:?}", e.err)
472 fn add_or_update_node(net_graph_msg_handler: &NetGraphMsgHandler<Arc<chaininterface::ChainWatchInterfaceUtil>, Arc<test_utils::TestLogger>>, secp_ctx: &Secp256k1<All>, node_privkey: &SecretKey,
473 features: NodeFeatures, timestamp: u32) {
474 let node_id = PublicKey::from_secret_key(&secp_ctx, node_privkey);
475 let unsigned_announcement = UnsignedNodeAnnouncement {
481 addresses: Vec::new(),
482 excess_address_data: Vec::new(),
483 excess_data: Vec::new(),
485 let msghash = hash_to_message!(&Sha256dHash::hash(&unsigned_announcement.encode()[..])[..]);
486 let valid_announcement = NodeAnnouncement {
487 signature: secp_ctx.sign(&msghash, node_privkey),
488 contents: unsigned_announcement.clone()
491 match net_graph_msg_handler.handle_node_announcement(&valid_announcement) {
499 let secp_ctx = Secp256k1::new();
500 let our_privkey = &SecretKey::from_slice(&hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap()[..]).unwrap();
501 let our_id = PublicKey::from_secret_key(&secp_ctx, our_privkey);
502 let logger = Arc::new(test_utils::TestLogger::new());
503 let chain_monitor = Arc::new(chaininterface::ChainWatchInterfaceUtil::new(Network::Testnet));
504 let net_graph_msg_handler = NetGraphMsgHandler::new(chain_monitor, Arc::clone(&logger));
505 // Build network from our_id to node8:
507 // -1(1)2- node1 -1(3)2-
509 // our_id -1(12)2- node8 -1(13)2--- node3
511 // -1(2)2- node2 -1(4)2-
514 // chan1 1-to-2: disabled
515 // chan1 2-to-1: enabled, 0 fee
517 // chan2 1-to-2: enabled, ignored fee
518 // chan2 2-to-1: enabled, 0 fee
520 // chan3 1-to-2: enabled, 0 fee
521 // chan3 2-to-1: enabled, 100 msat fee
523 // chan4 1-to-2: enabled, 100% fee
524 // chan4 2-to-1: enabled, 0 fee
526 // chan12 1-to-2: enabled, ignored fee
527 // chan12 2-to-1: enabled, 0 fee
529 // chan13 1-to-2: enabled, 200% fee
530 // chan13 2-to-1: enabled, 0 fee
533 // -1(5)2- node4 -1(8)2--
537 // node3--1(6)2- node5 -1(9)2--- node7 (not in global route map)
539 // -1(7)2- node6 -1(10)2-
541 // chan5 1-to-2: enabled, 100 msat fee
542 // chan5 2-to-1: enabled, 0 fee
544 // chan6 1-to-2: enabled, 0 fee
545 // chan6 2-to-1: enabled, 0 fee
547 // chan7 1-to-2: enabled, 100% fee
548 // chan7 2-to-1: enabled, 0 fee
550 // chan8 1-to-2: enabled, variable fee (0 then 1000 msat)
551 // chan8 2-to-1: enabled, 0 fee
553 // chan9 1-to-2: enabled, 1001 msat fee
554 // chan9 2-to-1: enabled, 0 fee
556 // chan10 1-to-2: enabled, 0 fee
557 // chan10 2-to-1: enabled, 0 fee
559 // chan11 1-to-2: enabled, 0 fee
560 // chan11 2-to-1: enabled, 0 fee
562 let node1_privkey = &SecretKey::from_slice(&hex::decode("0202020202020202020202020202020202020202020202020202020202020202").unwrap()[..]).unwrap();
563 let node2_privkey = &SecretKey::from_slice(&hex::decode("0303030303030303030303030303030303030303030303030303030303030303").unwrap()[..]).unwrap();
564 let node3_privkey = &SecretKey::from_slice(&hex::decode("0404040404040404040404040404040404040404040404040404040404040404").unwrap()[..]).unwrap();
565 let node4_privkey = &SecretKey::from_slice(&hex::decode("0505050505050505050505050505050505050505050505050505050505050505").unwrap()[..]).unwrap();
566 let node5_privkey = &SecretKey::from_slice(&hex::decode("0606060606060606060606060606060606060606060606060606060606060606").unwrap()[..]).unwrap();
567 let node6_privkey = &SecretKey::from_slice(&hex::decode("0707070707070707070707070707070707070707070707070707070707070707").unwrap()[..]).unwrap();
568 let node7_privkey = &SecretKey::from_slice(&hex::decode("0808080808080808080808080808080808080808080808080808080808080808").unwrap()[..]).unwrap();
569 let node8_privkey = &SecretKey::from_slice(&hex::decode("0909090909090909090909090909090909090909090909090909090909090909").unwrap()[..]).unwrap();
572 let node1 = PublicKey::from_secret_key(&secp_ctx, node1_privkey);
573 let node2 = PublicKey::from_secret_key(&secp_ctx, node2_privkey);
574 let node3 = PublicKey::from_secret_key(&secp_ctx, node3_privkey);
575 let node4 = PublicKey::from_secret_key(&secp_ctx, node4_privkey);
576 let node5 = PublicKey::from_secret_key(&secp_ctx, node5_privkey);
577 let node6 = PublicKey::from_secret_key(&secp_ctx, node6_privkey);
578 let node7 = PublicKey::from_secret_key(&secp_ctx, node7_privkey);
579 let node8 = PublicKey::from_secret_key(&secp_ctx, node8_privkey);
581 macro_rules! id_to_feature_flags {
582 // Set the feature flags to the id'th odd (ie non-required) feature bit so that we can
583 // test for it later.
585 let idx = ($id - 1) * 2 + 1;
587 vec![1 << (idx - 8*3), 0, 0, 0]
588 } else if idx > 8*2 {
589 vec![1 << (idx - 8*2), 0, 0]
590 } else if idx > 8*1 {
591 vec![1 << (idx - 8*1), 0]
598 add_channel(&net_graph_msg_handler, &secp_ctx, our_privkey, node1_privkey, ChannelFeatures::from_le_bytes(id_to_feature_flags!(1)), 1);
599 update_channel(&net_graph_msg_handler, &secp_ctx, node1_privkey, UnsignedChannelUpdate {
600 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
604 cltv_expiry_delta: 0,
605 htlc_minimum_msat: 0,
607 fee_proportional_millionths: 0,
608 excess_data: Vec::new()
610 add_or_update_node(&net_graph_msg_handler, &secp_ctx, node1_privkey, NodeFeatures::from_le_bytes(id_to_feature_flags!(1)), 0);
612 add_channel(&net_graph_msg_handler, &secp_ctx, our_privkey, node2_privkey, ChannelFeatures::from_le_bytes(id_to_feature_flags!(2)), 2);
613 update_channel(&net_graph_msg_handler, &secp_ctx, our_privkey, UnsignedChannelUpdate {
614 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
618 cltv_expiry_delta: u16::max_value(),
619 htlc_minimum_msat: 0,
620 fee_base_msat: u32::max_value(),
621 fee_proportional_millionths: u32::max_value(),
622 excess_data: Vec::new()
624 update_channel(&net_graph_msg_handler, &secp_ctx, node2_privkey, UnsignedChannelUpdate {
625 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
629 cltv_expiry_delta: 0,
630 htlc_minimum_msat: 0,
632 fee_proportional_millionths: 0,
633 excess_data: Vec::new()
636 add_or_update_node(&net_graph_msg_handler, &secp_ctx, node2_privkey, NodeFeatures::from_le_bytes(id_to_feature_flags!(2)), 0);
638 add_channel(&net_graph_msg_handler, &secp_ctx, our_privkey, node8_privkey, ChannelFeatures::from_le_bytes(id_to_feature_flags!(12)), 12);
639 update_channel(&net_graph_msg_handler, &secp_ctx, our_privkey, UnsignedChannelUpdate {
640 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
641 short_channel_id: 12,
644 cltv_expiry_delta: u16::max_value(),
645 htlc_minimum_msat: 0,
646 fee_base_msat: u32::max_value(),
647 fee_proportional_millionths: u32::max_value(),
648 excess_data: Vec::new()
650 update_channel(&net_graph_msg_handler, &secp_ctx, node8_privkey, UnsignedChannelUpdate {
651 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
652 short_channel_id: 12,
655 cltv_expiry_delta: 0,
656 htlc_minimum_msat: 0,
658 fee_proportional_millionths: 0,
659 excess_data: Vec::new()
663 add_or_update_node(&net_graph_msg_handler, &secp_ctx, node8_privkey, NodeFeatures::from_le_bytes(id_to_feature_flags!(8)), 0);
665 add_channel(&net_graph_msg_handler, &secp_ctx, node1_privkey, node3_privkey, ChannelFeatures::from_le_bytes(id_to_feature_flags!(3)), 3);
666 update_channel(&net_graph_msg_handler, &secp_ctx, node1_privkey, UnsignedChannelUpdate {
667 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
671 cltv_expiry_delta: (3 << 8) | 1,
672 htlc_minimum_msat: 0,
674 fee_proportional_millionths: 0,
675 excess_data: Vec::new()
677 update_channel(&net_graph_msg_handler, &secp_ctx, node3_privkey, UnsignedChannelUpdate {
678 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
682 cltv_expiry_delta: (3 << 8) | 2,
683 htlc_minimum_msat: 0,
685 fee_proportional_millionths: 0,
686 excess_data: Vec::new()
690 add_channel(&net_graph_msg_handler, &secp_ctx, node2_privkey, node3_privkey, ChannelFeatures::from_le_bytes(id_to_feature_flags!(4)), 4);
691 update_channel(&net_graph_msg_handler, &secp_ctx, node2_privkey, UnsignedChannelUpdate {
692 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
696 cltv_expiry_delta: (4 << 8) | 1,
697 htlc_minimum_msat: 0,
699 fee_proportional_millionths: 1000000,
700 excess_data: Vec::new()
702 update_channel(&net_graph_msg_handler, &secp_ctx, node3_privkey, UnsignedChannelUpdate {
703 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
707 cltv_expiry_delta: (4 << 8) | 2,
708 htlc_minimum_msat: 0,
710 fee_proportional_millionths: 0,
711 excess_data: Vec::new()
714 add_channel(&net_graph_msg_handler, &secp_ctx, node8_privkey, node3_privkey, ChannelFeatures::from_le_bytes(id_to_feature_flags!(13)), 13);
715 update_channel(&net_graph_msg_handler, &secp_ctx, node8_privkey, UnsignedChannelUpdate {
716 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
717 short_channel_id: 13,
720 cltv_expiry_delta: (13 << 8) | 1,
721 htlc_minimum_msat: 0,
723 fee_proportional_millionths: 2000000,
724 excess_data: Vec::new()
726 update_channel(&net_graph_msg_handler, &secp_ctx, node3_privkey, UnsignedChannelUpdate {
727 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
728 short_channel_id: 13,
731 cltv_expiry_delta: (13 << 8) | 2,
732 htlc_minimum_msat: 0,
734 fee_proportional_millionths: 0,
735 excess_data: Vec::new()
737 add_or_update_node(&net_graph_msg_handler, &secp_ctx, node3_privkey, NodeFeatures::from_le_bytes(id_to_feature_flags!(3)), 0);
738 add_channel(&net_graph_msg_handler, &secp_ctx, node3_privkey, node5_privkey, ChannelFeatures::from_le_bytes(id_to_feature_flags!(6)), 6);
740 update_channel(&net_graph_msg_handler, &secp_ctx, node3_privkey, UnsignedChannelUpdate {
741 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
745 cltv_expiry_delta: (6 << 8) | 1,
746 htlc_minimum_msat: 0,
748 fee_proportional_millionths: 0,
749 excess_data: Vec::new()
751 update_channel(&net_graph_msg_handler, &secp_ctx, node5_privkey, UnsignedChannelUpdate {
752 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
756 cltv_expiry_delta: (6 << 8) | 2,
757 htlc_minimum_msat: 0,
759 fee_proportional_millionths: 0,
760 excess_data: Vec::new()
763 add_channel(&net_graph_msg_handler, &secp_ctx, node5_privkey, node4_privkey, ChannelFeatures::from_le_bytes(id_to_feature_flags!(11)), 11);
764 update_channel(&net_graph_msg_handler, &secp_ctx, node5_privkey, UnsignedChannelUpdate {
765 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
766 short_channel_id: 11,
769 cltv_expiry_delta: (11 << 8) | 1,
770 htlc_minimum_msat: 0,
772 fee_proportional_millionths: 0,
773 excess_data: Vec::new()
775 update_channel(&net_graph_msg_handler, &secp_ctx, node4_privkey, UnsignedChannelUpdate {
776 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
777 short_channel_id: 11,
780 cltv_expiry_delta: (11 << 8) | 2,
781 htlc_minimum_msat: 0,
783 fee_proportional_millionths: 0,
784 excess_data: Vec::new()
786 add_or_update_node(&net_graph_msg_handler, &secp_ctx, node5_privkey, NodeFeatures::from_le_bytes(id_to_feature_flags!(5)), 0);
787 add_or_update_node(&net_graph_msg_handler, &secp_ctx, node4_privkey, NodeFeatures::from_le_bytes(id_to_feature_flags!(4)), 0);
789 add_channel(&net_graph_msg_handler, &secp_ctx, node3_privkey, node6_privkey, ChannelFeatures::from_le_bytes(id_to_feature_flags!(7)), 7);
791 update_channel(&net_graph_msg_handler, &secp_ctx, node3_privkey, UnsignedChannelUpdate {
792 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
796 cltv_expiry_delta: (7 << 8) | 1,
797 htlc_minimum_msat: 0,
799 fee_proportional_millionths: 1000000,
800 excess_data: Vec::new()
802 update_channel(&net_graph_msg_handler, &secp_ctx, node6_privkey, UnsignedChannelUpdate {
803 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
807 cltv_expiry_delta: (7 << 8) | 2,
808 htlc_minimum_msat: 0,
810 fee_proportional_millionths: 0,
811 excess_data: Vec::new()
814 add_or_update_node(&net_graph_msg_handler, &secp_ctx, node6_privkey, NodeFeatures::from_le_bytes(id_to_feature_flags!(6)), 0);
816 // Simple route to 3 via 2
817 let route = get_route(&our_id, &net_graph_msg_handler.network_graph.read().unwrap(), &node3, None, &Vec::new(), 100, 42, Arc::clone(&logger)).unwrap();
818 assert_eq!(route.paths[0].len(), 2);
820 assert_eq!(route.paths[0][0].pubkey, node2);
821 assert_eq!(route.paths[0][0].short_channel_id, 2);
822 assert_eq!(route.paths[0][0].fee_msat, 100);
823 assert_eq!(route.paths[0][0].cltv_expiry_delta, (4 << 8) | 1);
824 assert_eq!(route.paths[0][0].node_features.le_flags(), &id_to_feature_flags!(2));
825 assert_eq!(route.paths[0][0].channel_features.le_flags(), &id_to_feature_flags!(2));
827 assert_eq!(route.paths[0][1].pubkey, node3);
828 assert_eq!(route.paths[0][1].short_channel_id, 4);
829 assert_eq!(route.paths[0][1].fee_msat, 100);
830 assert_eq!(route.paths[0][1].cltv_expiry_delta, 42);
831 assert_eq!(route.paths[0][1].node_features.le_flags(), &id_to_feature_flags!(3));
832 assert_eq!(route.paths[0][1].channel_features.le_flags(), &id_to_feature_flags!(4));
835 // // Disable channels 4 and 12 by flags=2
836 update_channel(&net_graph_msg_handler, &secp_ctx, node2_privkey, UnsignedChannelUpdate {
837 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
840 flags: 2, // to disable
841 cltv_expiry_delta: 0,
842 htlc_minimum_msat: 0,
844 fee_proportional_millionths: 0,
845 excess_data: Vec::new()
847 update_channel(&net_graph_msg_handler, &secp_ctx, our_privkey, UnsignedChannelUpdate {
848 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
849 short_channel_id: 12,
851 flags: 2, // to disable
852 cltv_expiry_delta: 0,
853 htlc_minimum_msat: 0,
855 fee_proportional_millionths: 0,
856 excess_data: Vec::new()
859 // If all the channels require some features we don't understand, route should fail
860 if let Err(LightningError{err, action: ErrorAction::IgnoreError}) = get_route(&our_id, &net_graph_msg_handler.network_graph.read().unwrap(), &node3, None, &Vec::new(), 100, 42, Arc::clone(&logger)) {
861 assert_eq!(err, "Failed to find a path to the given destination");
864 // If we specify a channel to node8, that overrides our local channel view and that gets used
865 let our_chans = vec![channelmanager::ChannelDetails {
867 short_channel_id: Some(42),
868 remote_network_id: node8.clone(),
869 counterparty_features: InitFeatures::from_le_bytes(vec![0b11]),
870 channel_value_satoshis: 0,
872 outbound_capacity_msat: 0,
873 inbound_capacity_msat: 0,
876 let route = get_route(&our_id, &net_graph_msg_handler.network_graph.read().unwrap(), &node3, Some(&our_chans), &Vec::new(), 100, 42, Arc::clone(&logger)).unwrap();
877 assert_eq!(route.paths[0].len(), 2);
879 assert_eq!(route.paths[0][0].pubkey, node8);
880 assert_eq!(route.paths[0][0].short_channel_id, 42);
881 assert_eq!(route.paths[0][0].fee_msat, 200);
882 assert_eq!(route.paths[0][0].cltv_expiry_delta, (13 << 8) | 1);
883 assert_eq!(route.paths[0][0].node_features.le_flags(), &vec![0b11]); // it should also override our view of their features
884 assert_eq!(route.paths[0][0].channel_features.le_flags(), &Vec::new()); // No feature flags will meet the relevant-to-channel conversion
886 assert_eq!(route.paths[0][1].pubkey, node3);
887 assert_eq!(route.paths[0][1].short_channel_id, 13);
888 assert_eq!(route.paths[0][1].fee_msat, 100);
889 assert_eq!(route.paths[0][1].cltv_expiry_delta, 42);
890 assert_eq!(route.paths[0][1].node_features.le_flags(), &id_to_feature_flags!(3));
891 assert_eq!(route.paths[0][1].channel_features.le_flags(), &id_to_feature_flags!(13));
893 // Re-enable channels 4 and 12
894 update_channel(&net_graph_msg_handler, &secp_ctx, node2_privkey, UnsignedChannelUpdate {
895 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
898 flags: 0, // to enable
899 cltv_expiry_delta: (4 << 8) | 1,
900 htlc_minimum_msat: 0,
902 fee_proportional_millionths: 1000000,
903 excess_data: Vec::new()
905 update_channel(&net_graph_msg_handler, &secp_ctx, our_privkey, UnsignedChannelUpdate {
906 chain_hash: genesis_block(Network::Testnet).header.bitcoin_hash(),
907 short_channel_id: 12,
909 flags: 0, // to enable
910 cltv_expiry_delta: u16::max_value(),
911 htlc_minimum_msat: 0,
912 fee_base_msat: u32::max_value(),
913 fee_proportional_millionths: u32::max_value(),
914 excess_data: Vec::new()
916 // Disable nodes 1, 2, and 8 by requiring unknown feature bits
917 let mut unknown_features = NodeFeatures::known();
918 unknown_features.set_required_unknown_bits();
919 add_or_update_node(&net_graph_msg_handler, &secp_ctx, node1_privkey, unknown_features.clone(), 1);
920 add_or_update_node(&net_graph_msg_handler, &secp_ctx, node2_privkey, unknown_features.clone(), 1);
921 add_or_update_node(&net_graph_msg_handler, &secp_ctx, node8_privkey, unknown_features.clone(), 1);
923 // // If all nodes require some features we don't understand, route should fail
924 // if let Err(LightningError{err, action: ErrorAction::IgnoreError}) = get_route(&our_id, &net_graph_msg_handler, &node3, None, &Vec::new(), 100, 42, Arc::clone(&logger)) {
925 // assert_eq!(err, "Failed to find a path to the given destination");
926 // } else { panic!(); }
928 // If we specify a channel to node8, that overrides our local channel view and that gets used
929 let our_chans = vec![channelmanager::ChannelDetails {
931 short_channel_id: Some(42),
932 remote_network_id: node8.clone(),
933 counterparty_features: InitFeatures::from_le_bytes(vec![0b11]),
934 channel_value_satoshis: 0,
936 outbound_capacity_msat: 0,
937 inbound_capacity_msat: 0,
940 let route = get_route(&our_id, &net_graph_msg_handler.network_graph.read().unwrap(), &node3, Some(&our_chans), &Vec::new(), 100, 42, Arc::clone(&logger)).unwrap();
941 assert_eq!(route.paths[0].len(), 2);
943 assert_eq!(route.paths[0][0].pubkey, node8);
944 assert_eq!(route.paths[0][0].short_channel_id, 42);
945 assert_eq!(route.paths[0][0].fee_msat, 200);
946 assert_eq!(route.paths[0][0].cltv_expiry_delta, (13 << 8) | 1);
947 assert_eq!(route.paths[0][0].node_features.le_flags(), &vec![0b11]); // it should also override our view of their features
948 assert_eq!(route.paths[0][0].channel_features.le_flags(), &Vec::new()); // No feature flags will meet the relevant-to-channel conversion
950 assert_eq!(route.paths[0][1].pubkey, node3);
951 assert_eq!(route.paths[0][1].short_channel_id, 13);
952 assert_eq!(route.paths[0][1].fee_msat, 100);
953 assert_eq!(route.paths[0][1].cltv_expiry_delta, 42);
954 assert_eq!(route.paths[0][1].node_features.le_flags(), &id_to_feature_flags!(3));
955 assert_eq!(route.paths[0][1].channel_features.le_flags(), &id_to_feature_flags!(13));
957 // Re-enable nodes 1, 2, and 8
958 add_or_update_node(&net_graph_msg_handler, &secp_ctx, node1_privkey, NodeFeatures::from_le_bytes(id_to_feature_flags!(1)), 2);
959 add_or_update_node(&net_graph_msg_handler, &secp_ctx, node2_privkey, NodeFeatures::from_le_bytes(id_to_feature_flags!(2)), 2);
960 add_or_update_node(&net_graph_msg_handler, &secp_ctx, node8_privkey, NodeFeatures::from_le_bytes(id_to_feature_flags!(8)), 2);
962 // Note that we don't test disabling node 3 and failing to route to it, as we (somewhat
963 // naively) assume that the user checked the feature bits on the invoice, which override
964 // the node_announcement.
966 // Route to 1 via 2 and 3 because our channel to 1 is disabled
967 let route = get_route(&our_id, &net_graph_msg_handler.network_graph.read().unwrap(), &node1, None, &Vec::new(), 100, 42, Arc::clone(&logger)).unwrap();
968 assert_eq!(route.paths[0].len(), 3);
970 assert_eq!(route.paths[0][0].pubkey, node2);
971 assert_eq!(route.paths[0][0].short_channel_id, 2);
972 assert_eq!(route.paths[0][0].fee_msat, 200);
973 assert_eq!(route.paths[0][0].cltv_expiry_delta, (4 << 8) | 1);
974 assert_eq!(route.paths[0][0].node_features.le_flags(), &id_to_feature_flags!(2));
975 assert_eq!(route.paths[0][0].channel_features.le_flags(), &id_to_feature_flags!(2));
977 assert_eq!(route.paths[0][1].pubkey, node3);
978 assert_eq!(route.paths[0][1].short_channel_id, 4);
979 assert_eq!(route.paths[0][1].fee_msat, 100);
980 assert_eq!(route.paths[0][1].cltv_expiry_delta, (3 << 8) | 2);
981 assert_eq!(route.paths[0][1].node_features.le_flags(), &id_to_feature_flags!(3));
982 assert_eq!(route.paths[0][1].channel_features.le_flags(), &id_to_feature_flags!(4));
984 assert_eq!(route.paths[0][2].pubkey, node1);
985 assert_eq!(route.paths[0][2].short_channel_id, 3);
986 assert_eq!(route.paths[0][2].fee_msat, 100);
987 assert_eq!(route.paths[0][2].cltv_expiry_delta, 42);
988 assert_eq!(route.paths[0][2].node_features.le_flags(), &id_to_feature_flags!(1));
989 assert_eq!(route.paths[0][2].channel_features.le_flags(), &id_to_feature_flags!(3));
991 // If we specify a channel to node8, that overrides our local channel view and that gets used
992 let our_chans = vec![channelmanager::ChannelDetails {
994 short_channel_id: Some(42),
995 remote_network_id: node8.clone(),
996 counterparty_features: InitFeatures::from_le_bytes(vec![0b11]),
997 channel_value_satoshis: 0,
999 outbound_capacity_msat: 0,
1000 inbound_capacity_msat: 0,
1003 let route = get_route(&our_id, &net_graph_msg_handler.network_graph.read().unwrap(), &node3, Some(&our_chans), &Vec::new(), 100, 42, Arc::clone(&logger)).unwrap();
1004 assert_eq!(route.paths[0].len(), 2);
1006 assert_eq!(route.paths[0][0].pubkey, node8);
1007 assert_eq!(route.paths[0][0].short_channel_id, 42);
1008 assert_eq!(route.paths[0][0].fee_msat, 200);
1009 assert_eq!(route.paths[0][0].cltv_expiry_delta, (13 << 8) | 1);
1010 assert_eq!(route.paths[0][0].node_features.le_flags(), &vec![0b11]);
1011 assert_eq!(route.paths[0][0].channel_features.le_flags(), &Vec::new()); // No feature flags will meet the relevant-to-channel conversion
1013 assert_eq!(route.paths[0][1].pubkey, node3);
1014 assert_eq!(route.paths[0][1].short_channel_id, 13);
1015 assert_eq!(route.paths[0][1].fee_msat, 100);
1016 assert_eq!(route.paths[0][1].cltv_expiry_delta, 42);
1017 assert_eq!(route.paths[0][1].node_features.le_flags(), &id_to_feature_flags!(3));
1018 assert_eq!(route.paths[0][1].channel_features.le_flags(), &id_to_feature_flags!(13));
1020 let zero_fees = RoutingFees {
1022 proportional_millionths: 0,
1024 let mut last_hops = vec!(RouteHint {
1025 src_node_id: node4.clone(),
1026 short_channel_id: 8,
1028 cltv_expiry_delta: (8 << 8) | 1,
1029 htlc_minimum_msat: 0,
1031 src_node_id: node5.clone(),
1032 short_channel_id: 9,
1035 proportional_millionths: 0,
1037 cltv_expiry_delta: (9 << 8) | 1,
1038 htlc_minimum_msat: 0,
1040 src_node_id: node6.clone(),
1041 short_channel_id: 10,
1043 cltv_expiry_delta: (10 << 8) | 1,
1044 htlc_minimum_msat: 0,
1047 // Simple test across 2, 3, 5, and 4 via a last_hop channel
1048 let route = get_route(&our_id, &net_graph_msg_handler.network_graph.read().unwrap(), &node7, None, &last_hops, 100, 42, Arc::clone(&logger)).unwrap();
1049 assert_eq!(route.paths[0].len(), 5);
1051 assert_eq!(route.paths[0][0].pubkey, node2);
1052 assert_eq!(route.paths[0][0].short_channel_id, 2);
1053 assert_eq!(route.paths[0][0].fee_msat, 100);
1054 assert_eq!(route.paths[0][0].cltv_expiry_delta, (4 << 8) | 1);
1055 assert_eq!(route.paths[0][0].node_features.le_flags(), &id_to_feature_flags!(2));
1056 assert_eq!(route.paths[0][0].channel_features.le_flags(), &id_to_feature_flags!(2));
1058 assert_eq!(route.paths[0][1].pubkey, node3);
1059 assert_eq!(route.paths[0][1].short_channel_id, 4);
1060 assert_eq!(route.paths[0][1].fee_msat, 0);
1061 assert_eq!(route.paths[0][1].cltv_expiry_delta, (6 << 8) | 1);
1062 assert_eq!(route.paths[0][1].node_features.le_flags(), &id_to_feature_flags!(3));
1063 assert_eq!(route.paths[0][1].channel_features.le_flags(), &id_to_feature_flags!(4));
1065 assert_eq!(route.paths[0][2].pubkey, node5);
1066 assert_eq!(route.paths[0][2].short_channel_id, 6);
1067 assert_eq!(route.paths[0][2].fee_msat, 0);
1068 assert_eq!(route.paths[0][2].cltv_expiry_delta, (11 << 8) | 1);
1069 assert_eq!(route.paths[0][2].node_features.le_flags(), &id_to_feature_flags!(5));
1070 assert_eq!(route.paths[0][2].channel_features.le_flags(), &id_to_feature_flags!(6));
1072 assert_eq!(route.paths[0][3].pubkey, node4);
1073 assert_eq!(route.paths[0][3].short_channel_id, 11);
1074 assert_eq!(route.paths[0][3].fee_msat, 0);
1075 assert_eq!(route.paths[0][3].cltv_expiry_delta, (8 << 8) | 1);
1076 // If we have a peer in the node map, we'll use their features here since we don't have
1077 // a way of figuring out their features from the invoice:
1078 assert_eq!(route.paths[0][3].node_features.le_flags(), &id_to_feature_flags!(4));
1079 assert_eq!(route.paths[0][3].channel_features.le_flags(), &id_to_feature_flags!(11));
1081 assert_eq!(route.paths[0][4].pubkey, node7);
1082 assert_eq!(route.paths[0][4].short_channel_id, 8);
1083 assert_eq!(route.paths[0][4].fee_msat, 100);
1084 assert_eq!(route.paths[0][4].cltv_expiry_delta, 42);
1085 assert_eq!(route.paths[0][4].node_features.le_flags(), &Vec::new()); // We dont pass flags in from invoices yet
1086 assert_eq!(route.paths[0][4].channel_features.le_flags(), &Vec::new()); // We can't learn any flags from invoices, sadly
1088 // Simple test with outbound channel to 4 to test that last_hops and first_hops connect
1089 let our_chans = vec![channelmanager::ChannelDetails {
1090 channel_id: [0; 32],
1091 short_channel_id: Some(42),
1092 remote_network_id: node4.clone(),
1093 counterparty_features: InitFeatures::from_le_bytes(vec![0b11]),
1094 channel_value_satoshis: 0,
1096 outbound_capacity_msat: 0,
1097 inbound_capacity_msat: 0,
1100 let route = get_route(&our_id, &net_graph_msg_handler.network_graph.read().unwrap(), &node7, Some(&our_chans), &last_hops, 100, 42, Arc::clone(&logger)).unwrap();
1101 assert_eq!(route.paths[0].len(), 2);
1103 assert_eq!(route.paths[0][0].pubkey, node4);
1104 assert_eq!(route.paths[0][0].short_channel_id, 42);
1105 assert_eq!(route.paths[0][0].fee_msat, 0);
1106 assert_eq!(route.paths[0][0].cltv_expiry_delta, (8 << 8) | 1);
1107 assert_eq!(route.paths[0][0].node_features.le_flags(), &vec![0b11]);
1108 assert_eq!(route.paths[0][0].channel_features.le_flags(), &Vec::new()); // No feature flags will meet the relevant-to-channel conversion
1110 assert_eq!(route.paths[0][1].pubkey, node7);
1111 assert_eq!(route.paths[0][1].short_channel_id, 8);
1112 assert_eq!(route.paths[0][1].fee_msat, 100);
1113 assert_eq!(route.paths[0][1].cltv_expiry_delta, 42);
1114 assert_eq!(route.paths[0][1].node_features.le_flags(), &Vec::new()); // We dont pass flags in from invoices yet
1115 assert_eq!(route.paths[0][1].channel_features.le_flags(), &Vec::new()); // We can't learn any flags from invoices, sadly
1117 last_hops[0].fees.base_msat = 1000;
1119 // Revert to via 6 as the fee on 8 goes up
1120 let route = get_route(&our_id, &net_graph_msg_handler.network_graph.read().unwrap(), &node7, None, &last_hops, 100, 42, Arc::clone(&logger)).unwrap();
1121 assert_eq!(route.paths[0].len(), 4);
1123 assert_eq!(route.paths[0][0].pubkey, node2);
1124 assert_eq!(route.paths[0][0].short_channel_id, 2);
1125 assert_eq!(route.paths[0][0].fee_msat, 200); // fee increased as its % of value transferred across node
1126 assert_eq!(route.paths[0][0].cltv_expiry_delta, (4 << 8) | 1);
1127 assert_eq!(route.paths[0][0].node_features.le_flags(), &id_to_feature_flags!(2));
1128 assert_eq!(route.paths[0][0].channel_features.le_flags(), &id_to_feature_flags!(2));
1130 assert_eq!(route.paths[0][1].pubkey, node3);
1131 assert_eq!(route.paths[0][1].short_channel_id, 4);
1132 assert_eq!(route.paths[0][1].fee_msat, 100);
1133 assert_eq!(route.paths[0][1].cltv_expiry_delta, (7 << 8) | 1);
1134 assert_eq!(route.paths[0][1].node_features.le_flags(), &id_to_feature_flags!(3));
1135 assert_eq!(route.paths[0][1].channel_features.le_flags(), &id_to_feature_flags!(4));
1137 assert_eq!(route.paths[0][2].pubkey, node6);
1138 assert_eq!(route.paths[0][2].short_channel_id, 7);
1139 assert_eq!(route.paths[0][2].fee_msat, 0);
1140 assert_eq!(route.paths[0][2].cltv_expiry_delta, (10 << 8) | 1);
1141 // If we have a peer in the node map, we'll use their features here since we don't have
1142 // a way of figuring out their features from the invoice:
1143 assert_eq!(route.paths[0][2].node_features.le_flags(), &id_to_feature_flags!(6));
1144 assert_eq!(route.paths[0][2].channel_features.le_flags(), &id_to_feature_flags!(7));
1146 assert_eq!(route.paths[0][3].pubkey, node7);
1147 assert_eq!(route.paths[0][3].short_channel_id, 10);
1148 assert_eq!(route.paths[0][3].fee_msat, 100);
1149 assert_eq!(route.paths[0][3].cltv_expiry_delta, 42);
1150 assert_eq!(route.paths[0][3].node_features.le_flags(), &Vec::new()); // We dont pass flags in from invoices yet
1151 assert_eq!(route.paths[0][3].channel_features.le_flags(), &Vec::new()); // We can't learn any flags from invoices, sadly
1153 // ...but still use 8 for larger payments as 6 has a variable feerate
1154 let route = get_route(&our_id, &net_graph_msg_handler.network_graph.read().unwrap(), &node7, None, &last_hops, 2000, 42, Arc::clone(&logger)).unwrap();
1155 assert_eq!(route.paths[0].len(), 5);
1157 assert_eq!(route.paths[0][0].pubkey, node2);
1158 assert_eq!(route.paths[0][0].short_channel_id, 2);
1159 assert_eq!(route.paths[0][0].fee_msat, 3000);
1160 assert_eq!(route.paths[0][0].cltv_expiry_delta, (4 << 8) | 1);
1161 assert_eq!(route.paths[0][0].node_features.le_flags(), &id_to_feature_flags!(2));
1162 assert_eq!(route.paths[0][0].channel_features.le_flags(), &id_to_feature_flags!(2));
1164 assert_eq!(route.paths[0][1].pubkey, node3);
1165 assert_eq!(route.paths[0][1].short_channel_id, 4);
1166 assert_eq!(route.paths[0][1].fee_msat, 0);
1167 assert_eq!(route.paths[0][1].cltv_expiry_delta, (6 << 8) | 1);
1168 assert_eq!(route.paths[0][1].node_features.le_flags(), &id_to_feature_flags!(3));
1169 assert_eq!(route.paths[0][1].channel_features.le_flags(), &id_to_feature_flags!(4));
1171 assert_eq!(route.paths[0][2].pubkey, node5);
1172 assert_eq!(route.paths[0][2].short_channel_id, 6);
1173 assert_eq!(route.paths[0][2].fee_msat, 0);
1174 assert_eq!(route.paths[0][2].cltv_expiry_delta, (11 << 8) | 1);
1175 assert_eq!(route.paths[0][2].node_features.le_flags(), &id_to_feature_flags!(5));
1176 assert_eq!(route.paths[0][2].channel_features.le_flags(), &id_to_feature_flags!(6));
1178 assert_eq!(route.paths[0][3].pubkey, node4);
1179 assert_eq!(route.paths[0][3].short_channel_id, 11);
1180 assert_eq!(route.paths[0][3].fee_msat, 1000);
1181 assert_eq!(route.paths[0][3].cltv_expiry_delta, (8 << 8) | 1);
1182 // If we have a peer in the node map, we'll use their features here since we don't have
1183 // a way of figuring out their features from the invoice:
1184 assert_eq!(route.paths[0][3].node_features.le_flags(), &id_to_feature_flags!(4));
1185 assert_eq!(route.paths[0][3].channel_features.le_flags(), &id_to_feature_flags!(11));
1187 assert_eq!(route.paths[0][4].pubkey, node7);
1188 assert_eq!(route.paths[0][4].short_channel_id, 8);
1189 assert_eq!(route.paths[0][4].fee_msat, 2000);
1190 assert_eq!(route.paths[0][4].cltv_expiry_delta, 42);
1191 assert_eq!(route.paths[0][4].node_features.le_flags(), &Vec::new()); // We dont pass flags in from invoices yet
1192 assert_eq!(route.paths[0][4].channel_features.le_flags(), &Vec::new()); // We can't learn any flags from invoices, sadly