1 // This file is Copyright its original authors, visible in version control
4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
7 // You may not use this file except in accordance with one or both of these
10 //! Onion message testing and test utilities live here.
12 use crate::blinded_path::BlindedPath;
13 use crate::sign::{NodeSigner, Recipient};
14 use crate::ln::features::InitFeatures;
15 use crate::ln::msgs::{self, DecodeError, OnionMessageHandler};
16 use super::{CustomOnionMessageContents, CustomOnionMessageHandler, Destination, OnionMessageContents, OnionMessenger, SendError};
17 use crate::util::ser::{Writeable, Writer};
18 use crate::util::test_utils;
20 use bitcoin::network::constants::Network;
21 use bitcoin::secp256k1::{PublicKey, Secp256k1};
23 use core::sync::atomic::{AtomicU16, Ordering};
25 use crate::io_extras::read_to_end;
28 struct MessengerNode {
29 keys_manager: Arc<test_utils::TestKeysInterface>,
30 messenger: OnionMessenger<Arc<test_utils::TestKeysInterface>, Arc<test_utils::TestKeysInterface>, Arc<test_utils::TestLogger>, Arc<TestCustomMessageHandler>>,
31 custom_message_handler: Arc<TestCustomMessageHandler>,
32 logger: Arc<test_utils::TestLogger>,
36 fn get_node_pk(&self) -> PublicKey {
37 self.keys_manager.get_node_id(Recipient::Node).unwrap()
42 struct TestCustomMessage {}
44 const CUSTOM_MESSAGE_TYPE: u64 = 4242;
45 const CUSTOM_MESSAGE_CONTENTS: [u8; 32] = [42; 32];
47 impl CustomOnionMessageContents for TestCustomMessage {
48 fn tlv_type(&self) -> u64 {
53 impl Writeable for TestCustomMessage {
54 fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
55 Ok(CUSTOM_MESSAGE_CONTENTS.write(w)?)
59 struct TestCustomMessageHandler {
60 num_messages_expected: AtomicU16,
63 impl TestCustomMessageHandler {
65 Self { num_messages_expected: AtomicU16::new(0) }
69 impl Drop for TestCustomMessageHandler {
71 #[cfg(feature = "std")] {
72 if std::thread::panicking() {
76 assert_eq!(self.num_messages_expected.load(Ordering::SeqCst), 0);
80 impl CustomOnionMessageHandler for TestCustomMessageHandler {
81 type CustomMessage = TestCustomMessage;
82 fn handle_custom_message(&self, _msg: Self::CustomMessage) {
83 self.num_messages_expected.fetch_sub(1, Ordering::SeqCst);
85 fn read_custom_message<R: io::Read>(&self, message_type: u64, buffer: &mut R) -> Result<Option<Self::CustomMessage>, DecodeError> where Self: Sized {
86 if message_type == CUSTOM_MESSAGE_TYPE {
87 let buf = read_to_end(buffer)?;
88 assert_eq!(buf, CUSTOM_MESSAGE_CONTENTS);
89 return Ok(Some(TestCustomMessage {}))
95 fn create_nodes(num_messengers: u8) -> Vec<MessengerNode> {
96 let mut nodes = Vec::new();
97 for i in 0..num_messengers {
98 let logger = Arc::new(test_utils::TestLogger::with_id(format!("node {}", i)));
99 let seed = [i as u8; 32];
100 let keys_manager = Arc::new(test_utils::TestKeysInterface::new(&seed, Network::Testnet));
101 let custom_message_handler = Arc::new(TestCustomMessageHandler::new());
102 nodes.push(MessengerNode {
103 keys_manager: keys_manager.clone(),
104 messenger: OnionMessenger::new(keys_manager.clone(), keys_manager.clone(), logger.clone(), custom_message_handler.clone()),
105 custom_message_handler,
109 for idx in 0..num_messengers - 1 {
110 let i = idx as usize;
111 let mut features = InitFeatures::empty();
112 features.set_onion_messages_optional();
113 let init_msg = msgs::Init { features, remote_network_address: None };
114 nodes[i].messenger.peer_connected(&nodes[i + 1].get_node_pk(), &init_msg.clone(), true).unwrap();
115 nodes[i + 1].messenger.peer_connected(&nodes[i].get_node_pk(), &init_msg.clone(), false).unwrap();
120 fn pass_along_path(path: &Vec<MessengerNode>) {
121 path[path.len() - 1].custom_message_handler.num_messages_expected.fetch_add(1, Ordering::SeqCst);
122 let mut prev_node = &path[0];
123 for node in path.into_iter().skip(1) {
124 let events = prev_node.messenger.release_pending_msgs();
126 let msgs = events.get(&node.get_node_pk()).unwrap();
127 assert_eq!(msgs.len(), 1);
130 node.messenger.handle_onion_message(&prev_node.get_node_pk(), &onion_msg);
137 let nodes = create_nodes(2);
138 let test_msg = OnionMessageContents::Custom(TestCustomMessage {});
140 nodes[0].messenger.send_onion_message(&[], Destination::Node(nodes[1].get_node_pk()), test_msg, None).unwrap();
141 pass_along_path(&nodes);
145 fn two_unblinded_hops() {
146 let nodes = create_nodes(3);
147 let test_msg = OnionMessageContents::Custom(TestCustomMessage {});
149 nodes[0].messenger.send_onion_message(&[nodes[1].get_node_pk()], Destination::Node(nodes[2].get_node_pk()), test_msg, None).unwrap();
150 pass_along_path(&nodes);
154 fn two_unblinded_two_blinded() {
155 let nodes = create_nodes(5);
156 let test_msg = OnionMessageContents::Custom(TestCustomMessage {});
158 let secp_ctx = Secp256k1::new();
159 let blinded_path = BlindedPath::new_for_message(&[nodes[3].get_node_pk(), nodes[4].get_node_pk()], &*nodes[4].keys_manager, &secp_ctx).unwrap();
161 nodes[0].messenger.send_onion_message(&[nodes[1].get_node_pk(), nodes[2].get_node_pk()], Destination::BlindedPath(blinded_path), test_msg, None).unwrap();
162 pass_along_path(&nodes);
166 fn three_blinded_hops() {
167 let nodes = create_nodes(4);
168 let test_msg = OnionMessageContents::Custom(TestCustomMessage {});
170 let secp_ctx = Secp256k1::new();
171 let blinded_path = BlindedPath::new_for_message(&[nodes[1].get_node_pk(), nodes[2].get_node_pk(), nodes[3].get_node_pk()], &*nodes[3].keys_manager, &secp_ctx).unwrap();
173 nodes[0].messenger.send_onion_message(&[], Destination::BlindedPath(blinded_path), test_msg, None).unwrap();
174 pass_along_path(&nodes);
178 fn too_big_packet_error() {
179 // Make sure we error as expected if a packet is too big to send.
180 let nodes = create_nodes(2);
181 let test_msg = OnionMessageContents::Custom(TestCustomMessage {});
183 let hop_node_id = nodes[1].get_node_pk();
184 let hops = [hop_node_id; 400];
185 let err = nodes[0].messenger.send_onion_message(&hops, Destination::Node(hop_node_id), test_msg, None).unwrap_err();
186 assert_eq!(err, SendError::TooBigPacket);
190 fn we_are_intro_node() {
191 // If we are sending straight to a blinded path and we are the introduction node, we need to
192 // advance the blinded path by 1 hop so the second hop is the new introduction node.
193 let mut nodes = create_nodes(3);
194 let test_msg = TestCustomMessage {};
196 let secp_ctx = Secp256k1::new();
197 let blinded_path = BlindedPath::new_for_message(&[nodes[0].get_node_pk(), nodes[1].get_node_pk(), nodes[2].get_node_pk()], &*nodes[2].keys_manager, &secp_ctx).unwrap();
199 nodes[0].messenger.send_onion_message(&[], Destination::BlindedPath(blinded_path), OnionMessageContents::Custom(test_msg.clone()), None).unwrap();
200 pass_along_path(&nodes);
202 // Try with a two-hop blinded path where we are the introduction node.
203 let blinded_path = BlindedPath::new_for_message(&[nodes[0].get_node_pk(), nodes[1].get_node_pk()], &*nodes[1].keys_manager, &secp_ctx).unwrap();
204 nodes[0].messenger.send_onion_message(&[], Destination::BlindedPath(blinded_path), OnionMessageContents::Custom(test_msg), None).unwrap();
206 pass_along_path(&nodes);
210 fn invalid_blinded_path_error() {
211 // Make sure we error as expected if a provided blinded path has 0 or 1 hops.
212 let nodes = create_nodes(3);
213 let test_msg = TestCustomMessage {};
216 let secp_ctx = Secp256k1::new();
217 let mut blinded_path = BlindedPath::new_for_message(&[nodes[1].get_node_pk(), nodes[2].get_node_pk()], &*nodes[2].keys_manager, &secp_ctx).unwrap();
218 blinded_path.blinded_hops.clear();
219 let err = nodes[0].messenger.send_onion_message(&[], Destination::BlindedPath(blinded_path), OnionMessageContents::Custom(test_msg.clone()), None).unwrap_err();
220 assert_eq!(err, SendError::TooFewBlindedHops);
223 let mut blinded_path = BlindedPath::new_for_message(&[nodes[1].get_node_pk(), nodes[2].get_node_pk()], &*nodes[2].keys_manager, &secp_ctx).unwrap();
224 blinded_path.blinded_hops.remove(0);
225 assert_eq!(blinded_path.blinded_hops.len(), 1);
226 let err = nodes[0].messenger.send_onion_message(&[], Destination::BlindedPath(blinded_path), OnionMessageContents::Custom(test_msg), None).unwrap_err();
227 assert_eq!(err, SendError::TooFewBlindedHops);
232 let nodes = create_nodes(4);
233 let test_msg = TestCustomMessage {};
234 let secp_ctx = Secp256k1::new();
237 let reply_path = BlindedPath::new_for_message(&[nodes[2].get_node_pk(), nodes[1].get_node_pk(), nodes[0].get_node_pk()], &*nodes[0].keys_manager, &secp_ctx).unwrap();
238 nodes[0].messenger.send_onion_message(&[nodes[1].get_node_pk(), nodes[2].get_node_pk()], Destination::Node(nodes[3].get_node_pk()), OnionMessageContents::Custom(test_msg.clone()), Some(reply_path)).unwrap();
239 pass_along_path(&nodes);
240 // Make sure the last node successfully decoded the reply path.
241 nodes[3].logger.assert_log_contains(
242 "lightning::onion_message::messenger",
243 &format!("Received an onion message with path_id None and a reply_path"), 1);
245 // Destination::BlindedPath
246 let blinded_path = BlindedPath::new_for_message(&[nodes[1].get_node_pk(), nodes[2].get_node_pk(), nodes[3].get_node_pk()], &*nodes[3].keys_manager, &secp_ctx).unwrap();
247 let reply_path = BlindedPath::new_for_message(&[nodes[2].get_node_pk(), nodes[1].get_node_pk(), nodes[0].get_node_pk()], &*nodes[0].keys_manager, &secp_ctx).unwrap();
249 nodes[0].messenger.send_onion_message(&[], Destination::BlindedPath(blinded_path), OnionMessageContents::Custom(test_msg), Some(reply_path)).unwrap();
250 pass_along_path(&nodes);
251 nodes[3].logger.assert_log_contains(
252 "lightning::onion_message::messenger",
253 &format!("Received an onion message with path_id None and a reply_path"), 2);
257 fn invalid_custom_message_type() {
258 let nodes = create_nodes(2);
260 struct InvalidCustomMessage{}
261 impl CustomOnionMessageContents for InvalidCustomMessage {
262 fn tlv_type(&self) -> u64 {
263 // Onion message contents must have a TLV >= 64.
268 impl Writeable for InvalidCustomMessage {
269 fn write<W: Writer>(&self, _w: &mut W) -> Result<(), io::Error> { unreachable!() }
272 let test_msg = OnionMessageContents::Custom(InvalidCustomMessage {});
273 let err = nodes[0].messenger.send_onion_message(&[], Destination::Node(nodes[1].get_node_pk()), test_msg, None).unwrap_err();
274 assert_eq!(err, SendError::InvalidMessage);
278 fn peer_buffer_full() {
279 let nodes = create_nodes(2);
280 let test_msg = TestCustomMessage {};
281 for _ in 0..188 { // Based on MAX_PER_PEER_BUFFER_SIZE in OnionMessenger
282 nodes[0].messenger.send_onion_message(&[], Destination::Node(nodes[1].get_node_pk()), OnionMessageContents::Custom(test_msg.clone()), None).unwrap();
284 let err = nodes[0].messenger.send_onion_message(&[], Destination::Node(nodes[1].get_node_pk()), OnionMessageContents::Custom(test_msg), None).unwrap_err();
285 assert_eq!(err, SendError::BufferFull);
290 // Check we can send over a route with many hops. This will exercise our logic for onion messages
291 // of size [`crate::onion_message::packet::BIG_PACKET_HOP_DATA_LEN`].
292 let num_nodes: usize = 25;
293 let nodes = create_nodes(num_nodes as u8);
294 let test_msg = OnionMessageContents::Custom(TestCustomMessage {});
296 let mut intermediates = vec![];
297 for i in 1..(num_nodes-1) {
298 intermediates.push(nodes[i].get_node_pk());
301 nodes[0].messenger.send_onion_message(&intermediates, Destination::Node(nodes[num_nodes-1].get_node_pk()), test_msg, None).unwrap();
302 pass_along_path(&nodes);