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[rust-lightning] / lightning / src / ln / shutdown_tests.rs
1 // This file is Copyright its original authors, visible in version control
2 // history.
3 //
4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
7 // You may not use this file except in accordance with one or both of these
8 // licenses.
9
10 //! Tests of our shutdown and closing_signed negotiation logic.
11
12 use crate::sign::{EntropySource, SignerProvider};
13 use crate::chain::transaction::OutPoint;
14 use crate::events::{MessageSendEvent, MessageSendEventsProvider, ClosureReason};
15 use crate::ln::channelmanager::{self, PaymentSendFailure, PaymentId, RecipientOnionFields, ChannelShutdownState, ChannelDetails};
16 use crate::routing::router::{PaymentParameters, get_route, RouteParameters};
17 use crate::ln::msgs;
18 use crate::ln::msgs::{ChannelMessageHandler, ErrorAction};
19 use crate::ln::script::ShutdownScript;
20 use crate::util::test_utils;
21 use crate::util::test_utils::OnGetShutdownScriptpubkey;
22 use crate::util::errors::APIError;
23 use crate::util::config::UserConfig;
24 use crate::util::string::UntrustedString;
25
26 use bitcoin::blockdata::script::Builder;
27 use bitcoin::blockdata::opcodes;
28 use bitcoin::network::constants::Network;
29 use bitcoin::util::address::WitnessVersion;
30
31 use regex;
32
33 use core::default::Default;
34 use std::convert::TryFrom;
35
36 use crate::ln::functional_test_utils::*;
37
38 #[test]
39 fn pre_funding_lock_shutdown_test() {
40         // Test sending a shutdown prior to channel_ready after funding generation
41         let chanmon_cfgs = create_chanmon_cfgs(2);
42         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
43         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
44         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
45         let tx = create_chan_between_nodes_with_value_init(&nodes[0], &nodes[1], 8000000, 0);
46         mine_transaction(&nodes[0], &tx);
47         mine_transaction(&nodes[1], &tx);
48
49         nodes[0].node.close_channel(&OutPoint { txid: tx.txid(), index: 0 }.to_channel_id(), &nodes[1].node.get_our_node_id()).unwrap();
50         let node_0_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
51         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
52         let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
53         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
54
55         let node_0_closing_signed = get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id());
56         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_closing_signed);
57         let node_1_closing_signed = get_event_msg!(nodes[1], MessageSendEvent::SendClosingSigned, nodes[0].node.get_our_node_id());
58         nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &node_1_closing_signed);
59         let (_, node_0_2nd_closing_signed) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
60         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_2nd_closing_signed.unwrap());
61         let (_, node_1_none) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
62         assert!(node_1_none.is_none());
63
64         assert!(nodes[0].node.list_channels().is_empty());
65         assert!(nodes[1].node.list_channels().is_empty());
66         check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 8000000);
67         check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 8000000);
68 }
69
70 #[test]
71 fn expect_channel_shutdown_state() {
72         // Test sending a shutdown prior to channel_ready after funding generation
73         let chanmon_cfgs = create_chanmon_cfgs(2);
74         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
75         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
76         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
77         let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
78
79         expect_channel_shutdown_state!(nodes[0], chan_1.2, ChannelShutdownState::NotShuttingDown);
80
81         nodes[0].node.close_channel(&chan_1.2, &nodes[1].node.get_our_node_id()).unwrap();
82
83         expect_channel_shutdown_state!(nodes[0], chan_1.2, ChannelShutdownState::ShutdownInitiated);
84         expect_channel_shutdown_state!(nodes[1], chan_1.2, ChannelShutdownState::NotShuttingDown);
85
86         let node_0_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
87         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
88
89         // node1 goes into NegotiatingClosingFee since there are no HTLCs in flight, note that it
90         // doesnt mean that node1 has sent/recved its closing signed message
91         expect_channel_shutdown_state!(nodes[0], chan_1.2, ChannelShutdownState::ShutdownInitiated);
92         expect_channel_shutdown_state!(nodes[1], chan_1.2, ChannelShutdownState::NegotiatingClosingFee);
93
94         let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
95         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
96
97         expect_channel_shutdown_state!(nodes[0], chan_1.2, ChannelShutdownState::NegotiatingClosingFee);
98         expect_channel_shutdown_state!(nodes[1], chan_1.2, ChannelShutdownState::NegotiatingClosingFee);
99
100         let node_0_closing_signed = get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id());
101         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_closing_signed);
102         let node_1_closing_signed = get_event_msg!(nodes[1], MessageSendEvent::SendClosingSigned, nodes[0].node.get_our_node_id());
103         nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &node_1_closing_signed);
104         let (_, node_0_2nd_closing_signed) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
105         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_2nd_closing_signed.unwrap());
106         let (_, node_1_none) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
107         assert!(node_1_none.is_none());
108
109         assert!(nodes[0].node.list_channels().is_empty());
110         assert!(nodes[1].node.list_channels().is_empty());
111         check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
112         check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
113 }
114
115 #[test]
116 fn expect_channel_shutdown_state_with_htlc() {
117         // Test sending a shutdown with outstanding updates pending.
118         let chanmon_cfgs = create_chanmon_cfgs(3);
119         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
120         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
121         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
122         let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
123         let _chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2);
124
125         let (payment_preimage_0, payment_hash_0, ..) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 100_000);
126
127         expect_channel_shutdown_state!(nodes[0], chan_1.2, ChannelShutdownState::NotShuttingDown);
128         expect_channel_shutdown_state!(nodes[1], chan_1.2, ChannelShutdownState::NotShuttingDown);
129
130         nodes[0].node.close_channel(&chan_1.2, &nodes[1].node.get_our_node_id()).unwrap();
131
132         expect_channel_shutdown_state!(nodes[0], chan_1.2, ChannelShutdownState::ShutdownInitiated);
133         expect_channel_shutdown_state!(nodes[1], chan_1.2, ChannelShutdownState::NotShuttingDown);
134
135         let node_0_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
136         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
137
138         expect_channel_shutdown_state!(nodes[0], chan_1.2, ChannelShutdownState::ShutdownInitiated);
139         expect_channel_shutdown_state!(nodes[1], chan_1.2, ChannelShutdownState::ResolvingHTLCs);
140
141         let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
142         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
143
144         expect_channel_shutdown_state!(nodes[0], chan_1.2, ChannelShutdownState::ResolvingHTLCs);
145         expect_channel_shutdown_state!(nodes[1], chan_1.2, ChannelShutdownState::ResolvingHTLCs);
146
147         assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
148         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
149
150         // Claim Funds on Node2
151         nodes[2].node.claim_funds(payment_preimage_0);
152         check_added_monitors!(nodes[2], 1);
153         expect_payment_claimed!(nodes[2], payment_hash_0, 100_000);
154
155         // Fulfil HTLCs on node1 and node0
156         let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
157         assert!(updates.update_add_htlcs.is_empty());
158         assert!(updates.update_fail_htlcs.is_empty());
159         assert!(updates.update_fail_malformed_htlcs.is_empty());
160         assert!(updates.update_fee.is_none());
161         assert_eq!(updates.update_fulfill_htlcs.len(), 1);
162         nodes[1].node.handle_update_fulfill_htlc(&nodes[2].node.get_our_node_id(), &updates.update_fulfill_htlcs[0]);
163         expect_payment_forwarded!(nodes[1], nodes[0], nodes[2], Some(1000), false, false);
164         check_added_monitors!(nodes[1], 1);
165         let updates_2 = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
166         commitment_signed_dance!(nodes[1], nodes[2], updates.commitment_signed, false);
167
168         // Still in "resolvingHTLCs" on chan1 after htlc removed on chan2
169         expect_channel_shutdown_state!(nodes[0], chan_1.2, ChannelShutdownState::ResolvingHTLCs);
170         expect_channel_shutdown_state!(nodes[1], chan_1.2, ChannelShutdownState::ResolvingHTLCs);
171
172         assert!(updates_2.update_add_htlcs.is_empty());
173         assert!(updates_2.update_fail_htlcs.is_empty());
174         assert!(updates_2.update_fail_malformed_htlcs.is_empty());
175         assert!(updates_2.update_fee.is_none());
176         assert_eq!(updates_2.update_fulfill_htlcs.len(), 1);
177         nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &updates_2.update_fulfill_htlcs[0]);
178         commitment_signed_dance!(nodes[0], nodes[1], updates_2.commitment_signed, false, true);
179         expect_payment_sent!(nodes[0], payment_preimage_0);
180
181         // all htlcs removed, chan1 advances to NegotiatingClosingFee
182         expect_channel_shutdown_state!(nodes[0], chan_1.2, ChannelShutdownState::NegotiatingClosingFee);
183         expect_channel_shutdown_state!(nodes[1], chan_1.2, ChannelShutdownState::NegotiatingClosingFee);
184
185         // ClosingSignNegotion process
186         let node_0_closing_signed = get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id());
187         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_closing_signed);
188         let node_1_closing_signed = get_event_msg!(nodes[1], MessageSendEvent::SendClosingSigned, nodes[0].node.get_our_node_id());
189         nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &node_1_closing_signed);
190         let (_, node_0_2nd_closing_signed) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
191         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_2nd_closing_signed.unwrap());
192         let (_, node_1_none) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
193         assert!(node_1_none.is_none());
194         check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
195         check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
196
197         // Shutdown basically removes the channelDetails, testing of shutdowncomplete state unnecessary
198         assert!(nodes[0].node.list_channels().is_empty());
199 }
200
201 #[test]
202 fn test_lnd_bug_6039() {
203         // LND sends a nonsense error message any time it gets a shutdown if there are still HTLCs
204         // pending. We currently swallow that error to work around LND's bug #6039. This test emulates
205         // the LND nonsense and ensures we at least kinda handle it.
206         let chanmon_cfgs = create_chanmon_cfgs(2);
207         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
208         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
209         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
210         let chan = create_announced_chan_between_nodes(&nodes, 0, 1);
211
212         let (payment_preimage, ..) = route_payment(&nodes[0], &[&nodes[1]], 100_000);
213
214         nodes[0].node.close_channel(&chan.2, &nodes[1].node.get_our_node_id()).unwrap();
215         let node_0_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
216         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
217
218         // Generate an lnd-like error message and check that we respond by simply screaming louder to
219         // see if LND will accept our protocol compliance.
220         let err_msg = msgs::ErrorMessage { channel_id: chan.2, data: "link failed to shutdown".to_string() };
221         nodes[0].node.handle_error(&nodes[1].node.get_our_node_id(), &err_msg);
222         let node_a_responses = nodes[0].node.get_and_clear_pending_msg_events();
223         assert_eq!(node_a_responses[0], MessageSendEvent::SendShutdown {
224                         node_id: nodes[1].node.get_our_node_id(),
225                         msg: node_0_shutdown,
226                 });
227         if let MessageSendEvent::HandleError { action: msgs::ErrorAction::SendWarningMessage { .. }, .. }
228                 = node_a_responses[1] {} else { panic!(); }
229
230         let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
231
232         assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
233         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
234
235         claim_payment(&nodes[0], &[&nodes[1]], payment_preimage);
236
237         // Assume that LND will eventually respond to our Shutdown if we clear all the remaining HTLCs
238         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
239
240         // ClosingSignNegotion process
241         let node_0_closing_signed = get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id());
242         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_closing_signed);
243         let node_1_closing_signed = get_event_msg!(nodes[1], MessageSendEvent::SendClosingSigned, nodes[0].node.get_our_node_id());
244         nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &node_1_closing_signed);
245         let (_, node_0_2nd_closing_signed) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
246         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_2nd_closing_signed.unwrap());
247         let (_, node_1_none) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
248         assert!(node_1_none.is_none());
249         check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
250         check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
251
252         // Shutdown basically removes the channelDetails, testing of shutdowncomplete state unnecessary
253         assert!(nodes[0].node.list_channels().is_empty());
254 }
255
256 #[test]
257 fn shutdown_on_unfunded_channel() {
258         // Test receiving a shutdown prior to funding generation
259         let chanmon_cfgs = create_chanmon_cfgs(2);
260         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
261         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
262         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
263
264         nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 1_000_000, 100_000, 0, None).unwrap();
265         let open_chan = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
266
267         // Create a dummy P2WPKH script
268         let script = Builder::new().push_int(0)
269                 .push_slice(&[0; 20])
270                 .into_script();
271
272         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &msgs::Shutdown {
273                 channel_id: open_chan.temporary_channel_id, scriptpubkey: script,
274         });
275         check_closed_event!(nodes[0], 1, ClosureReason::CounterpartyCoopClosedUnfundedChannel, [nodes[1].node.get_our_node_id()], 1_000_000);
276 }
277
278 #[test]
279 fn expect_channel_shutdown_state_with_force_closure() {
280         // Test sending a shutdown prior to channel_ready after funding generation
281         let chanmon_cfgs = create_chanmon_cfgs(2);
282         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
283         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
284         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
285         let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
286
287         expect_channel_shutdown_state!(nodes[0], chan_1.2, ChannelShutdownState::NotShuttingDown);
288         expect_channel_shutdown_state!(nodes[1], chan_1.2, ChannelShutdownState::NotShuttingDown);
289
290         nodes[1].node.force_close_broadcasting_latest_txn(&chan_1.2, &nodes[0].node.get_our_node_id()).unwrap();
291         check_closed_broadcast!(nodes[1], true);
292         check_added_monitors!(nodes[1], 1);
293
294         expect_channel_shutdown_state!(nodes[0], chan_1.2, ChannelShutdownState::NotShuttingDown);
295         assert!(nodes[1].node.list_channels().is_empty());
296
297         let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
298         assert_eq!(node_txn.len(), 1);
299         check_spends!(node_txn[0], chan_1.3);
300         mine_transaction(&nodes[0], &node_txn[0]);
301         check_added_monitors!(nodes[0], 1);
302
303         assert!(nodes[0].node.list_channels().is_empty());
304         assert!(nodes[1].node.list_channels().is_empty());
305         check_closed_broadcast!(nodes[0], true);
306         check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed, [nodes[1].node.get_our_node_id()], 100000);
307         check_closed_event!(nodes[1], 1, ClosureReason::HolderForceClosed, [nodes[0].node.get_our_node_id()], 100000);
308 }
309
310 #[test]
311 fn updates_shutdown_wait() {
312         // Test sending a shutdown with outstanding updates pending
313         let chanmon_cfgs = create_chanmon_cfgs(3);
314         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
315         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
316         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
317         let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
318         let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2);
319         let logger = test_utils::TestLogger::new();
320         let scorer = test_utils::TestScorer::new();
321         let keys_manager = test_utils::TestKeysInterface::new(&[0u8; 32], Network::Testnet);
322         let random_seed_bytes = keys_manager.get_secure_random_bytes();
323
324         let (payment_preimage_0, payment_hash_0, ..) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 100_000);
325
326         nodes[0].node.close_channel(&chan_1.2, &nodes[1].node.get_our_node_id()).unwrap();
327         let node_0_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
328         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
329         let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
330         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
331
332         assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
333         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
334
335         let (_, payment_hash, payment_secret) = get_payment_preimage_hash!(nodes[0]);
336
337         let payment_params_1 = PaymentParameters::from_node_id(nodes[1].node.get_our_node_id(), TEST_FINAL_CLTV).with_bolt11_features(nodes[1].node.invoice_features()).unwrap();
338         let route_params = RouteParameters::from_payment_params_and_value(payment_params_1, 100_000);
339         let route_1 = get_route(&nodes[0].node.get_our_node_id(), &route_params,
340                 &nodes[0].network_graph.read_only(), None, &logger, &scorer, &Default::default(), &random_seed_bytes).unwrap();
341         let payment_params_2 = PaymentParameters::from_node_id(nodes[0].node.get_our_node_id(),
342                 TEST_FINAL_CLTV).with_bolt11_features(nodes[0].node.invoice_features()).unwrap();
343         let route_params = RouteParameters::from_payment_params_and_value(payment_params_2, 100_000);
344         let route_2 = get_route(&nodes[1].node.get_our_node_id(), &route_params,
345                 &nodes[1].network_graph.read_only(), None, &logger, &scorer, &Default::default(), &random_seed_bytes).unwrap();
346         unwrap_send_err!(nodes[0].node.send_payment_with_route(&route_1, payment_hash,
347                         RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_hash.0)
348                 ), true, APIError::ChannelUnavailable {..}, {});
349         unwrap_send_err!(nodes[1].node.send_payment_with_route(&route_2, payment_hash,
350                         RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_hash.0)
351                 ), true, APIError::ChannelUnavailable {..}, {});
352
353         nodes[2].node.claim_funds(payment_preimage_0);
354         check_added_monitors!(nodes[2], 1);
355         expect_payment_claimed!(nodes[2], payment_hash_0, 100_000);
356
357         let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
358         assert!(updates.update_add_htlcs.is_empty());
359         assert!(updates.update_fail_htlcs.is_empty());
360         assert!(updates.update_fail_malformed_htlcs.is_empty());
361         assert!(updates.update_fee.is_none());
362         assert_eq!(updates.update_fulfill_htlcs.len(), 1);
363         nodes[1].node.handle_update_fulfill_htlc(&nodes[2].node.get_our_node_id(), &updates.update_fulfill_htlcs[0]);
364         expect_payment_forwarded!(nodes[1], nodes[0], nodes[2], Some(1000), false, false);
365         check_added_monitors!(nodes[1], 1);
366         let updates_2 = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
367         commitment_signed_dance!(nodes[1], nodes[2], updates.commitment_signed, false);
368
369         assert!(updates_2.update_add_htlcs.is_empty());
370         assert!(updates_2.update_fail_htlcs.is_empty());
371         assert!(updates_2.update_fail_malformed_htlcs.is_empty());
372         assert!(updates_2.update_fee.is_none());
373         assert_eq!(updates_2.update_fulfill_htlcs.len(), 1);
374         nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &updates_2.update_fulfill_htlcs[0]);
375         commitment_signed_dance!(nodes[0], nodes[1], updates_2.commitment_signed, false, true);
376         expect_payment_sent!(nodes[0], payment_preimage_0);
377
378         let node_0_closing_signed = get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id());
379         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_closing_signed);
380         let node_1_closing_signed = get_event_msg!(nodes[1], MessageSendEvent::SendClosingSigned, nodes[0].node.get_our_node_id());
381         nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &node_1_closing_signed);
382         let (_, node_0_2nd_closing_signed) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
383         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_2nd_closing_signed.unwrap());
384         let (_, node_1_none) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
385         assert!(node_1_none.is_none());
386         check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
387         check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
388
389         assert!(nodes[0].node.list_channels().is_empty());
390
391         assert_eq!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
392         nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
393         close_channel(&nodes[1], &nodes[2], &chan_2.2, chan_2.3, true);
394         assert!(nodes[1].node.list_channels().is_empty());
395         assert!(nodes[2].node.list_channels().is_empty());
396         check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[2].node.get_our_node_id()], 100000);
397         check_closed_event!(nodes[2], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
398 }
399
400 #[test]
401 fn htlc_fail_async_shutdown() {
402         // Test HTLCs fail if shutdown starts even if messages are delivered out-of-order
403         let chanmon_cfgs = create_chanmon_cfgs(3);
404         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
405         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
406         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
407         let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
408         let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2);
409
410         let (route, our_payment_hash, _, our_payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], 100000);
411         nodes[0].node.send_payment_with_route(&route, our_payment_hash,
412                 RecipientOnionFields::secret_only(our_payment_secret), PaymentId(our_payment_hash.0)).unwrap();
413         check_added_monitors!(nodes[0], 1);
414         let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
415         assert_eq!(updates.update_add_htlcs.len(), 1);
416         assert!(updates.update_fulfill_htlcs.is_empty());
417         assert!(updates.update_fail_htlcs.is_empty());
418         assert!(updates.update_fail_malformed_htlcs.is_empty());
419         assert!(updates.update_fee.is_none());
420
421         nodes[1].node.close_channel(&chan_1.2, &nodes[0].node.get_our_node_id()).unwrap();
422         let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
423         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
424         let node_0_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
425
426         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
427         nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &updates.commitment_signed);
428         check_added_monitors!(nodes[1], 1);
429         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
430         commitment_signed_dance!(nodes[1], nodes[0], (), false, true, false, false);
431
432         let updates_2 = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
433         assert!(updates_2.update_add_htlcs.is_empty());
434         assert!(updates_2.update_fulfill_htlcs.is_empty());
435         assert_eq!(updates_2.update_fail_htlcs.len(), 1);
436         assert!(updates_2.update_fail_malformed_htlcs.is_empty());
437         assert!(updates_2.update_fee.is_none());
438
439         nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates_2.update_fail_htlcs[0]);
440         commitment_signed_dance!(nodes[0], nodes[1], updates_2.commitment_signed, false, true);
441
442         expect_payment_failed_with_update!(nodes[0], our_payment_hash, false, chan_2.0.contents.short_channel_id, true);
443
444         let msg_events = nodes[0].node.get_and_clear_pending_msg_events();
445         assert_eq!(msg_events.len(), 1);
446         let node_0_closing_signed = match msg_events[0] {
447                 MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
448                         assert_eq!(*node_id, nodes[1].node.get_our_node_id());
449                         (*msg).clone()
450                 },
451                 _ => panic!("Unexpected event"),
452         };
453
454         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
455         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_closing_signed);
456         let node_1_closing_signed = get_event_msg!(nodes[1], MessageSendEvent::SendClosingSigned, nodes[0].node.get_our_node_id());
457         nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &node_1_closing_signed);
458         let (_, node_0_2nd_closing_signed) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
459         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_2nd_closing_signed.unwrap());
460         let (_, node_1_none) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
461         assert!(node_1_none.is_none());
462
463         assert!(nodes[0].node.list_channels().is_empty());
464
465         assert_eq!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
466         nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
467         close_channel(&nodes[1], &nodes[2], &chan_2.2, chan_2.3, true);
468         assert!(nodes[1].node.list_channels().is_empty());
469         assert!(nodes[2].node.list_channels().is_empty());
470         check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
471         check_closed_event!(nodes[1], 2, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id(), nodes[2].node.get_our_node_id()], 100000);
472         check_closed_event!(nodes[2], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
473 }
474
475 fn do_test_shutdown_rebroadcast(recv_count: u8) {
476         // Test that shutdown/closing_signed is re-sent on reconnect with a variable number of
477         // messages delivered prior to disconnect
478         let chanmon_cfgs = create_chanmon_cfgs(3);
479         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
480         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
481         let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
482         let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
483         let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2);
484
485         let (payment_preimage, payment_hash, ..) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 100_000);
486
487         nodes[1].node.close_channel(&chan_1.2, &nodes[0].node.get_our_node_id()).unwrap();
488         let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
489         if recv_count > 0 {
490                 nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
491                 let node_0_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
492                 if recv_count > 1 {
493                         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
494                 }
495         }
496
497         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
498         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
499
500         nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init {
501                 features: nodes[1].node.init_features(), networks: None, remote_network_address: None
502         }, true).unwrap();
503         let node_0_reestablish = get_chan_reestablish_msgs!(nodes[0], nodes[1]).pop().unwrap();
504         nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init {
505                 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
506         }, false).unwrap();
507         let node_1_reestablish = get_chan_reestablish_msgs!(nodes[1], nodes[0]).pop().unwrap();
508
509         nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &node_0_reestablish);
510         let node_1_2nd_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
511         assert!(node_1_shutdown == node_1_2nd_shutdown);
512
513         nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &node_1_reestablish);
514         let node_0_2nd_shutdown = if recv_count > 0 {
515                 let node_0_2nd_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
516                 nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_2nd_shutdown);
517                 node_0_2nd_shutdown
518         } else {
519                 let node_0_chan_update = get_event_msg!(nodes[0], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
520                 assert_eq!(node_0_chan_update.contents.flags & 2, 0); // "disabled" flag must not be set as we just reconnected.
521                 nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_2nd_shutdown);
522                 get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id())
523         };
524         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_2nd_shutdown);
525
526         assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
527         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
528
529         nodes[2].node.claim_funds(payment_preimage);
530         check_added_monitors!(nodes[2], 1);
531         expect_payment_claimed!(nodes[2], payment_hash, 100_000);
532
533         let updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
534         assert!(updates.update_add_htlcs.is_empty());
535         assert!(updates.update_fail_htlcs.is_empty());
536         assert!(updates.update_fail_malformed_htlcs.is_empty());
537         assert!(updates.update_fee.is_none());
538         assert_eq!(updates.update_fulfill_htlcs.len(), 1);
539         nodes[1].node.handle_update_fulfill_htlc(&nodes[2].node.get_our_node_id(), &updates.update_fulfill_htlcs[0]);
540         expect_payment_forwarded!(nodes[1], nodes[0], nodes[2], Some(1000), false, false);
541         check_added_monitors!(nodes[1], 1);
542         let updates_2 = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
543         commitment_signed_dance!(nodes[1], nodes[2], updates.commitment_signed, false);
544
545         assert!(updates_2.update_add_htlcs.is_empty());
546         assert!(updates_2.update_fail_htlcs.is_empty());
547         assert!(updates_2.update_fail_malformed_htlcs.is_empty());
548         assert!(updates_2.update_fee.is_none());
549         assert_eq!(updates_2.update_fulfill_htlcs.len(), 1);
550         nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &updates_2.update_fulfill_htlcs[0]);
551         commitment_signed_dance!(nodes[0], nodes[1], updates_2.commitment_signed, false, true);
552         expect_payment_sent!(nodes[0], payment_preimage);
553
554         let node_0_closing_signed = get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id());
555         if recv_count > 0 {
556                 nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_closing_signed);
557                 let node_1_closing_signed = get_event_msg!(nodes[1], MessageSendEvent::SendClosingSigned, nodes[0].node.get_our_node_id());
558                 nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &node_1_closing_signed);
559                 let (_, node_0_2nd_closing_signed) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
560                 assert!(node_0_2nd_closing_signed.is_some());
561         }
562
563         nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id());
564         nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id());
565
566         nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init {
567                 features: nodes[0].node.init_features(), networks: None, remote_network_address: None
568         }, true).unwrap();
569         let node_1_2nd_reestablish = get_chan_reestablish_msgs!(nodes[1], nodes[0]).pop().unwrap();
570         nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init {
571                 features: nodes[1].node.init_features(), networks: None, remote_network_address: None
572         }, false).unwrap();
573         if recv_count == 0 {
574                 // If all closing_signeds weren't delivered we can just resume where we left off...
575                 let node_0_2nd_reestablish = get_chan_reestablish_msgs!(nodes[0], nodes[1]).pop().unwrap();
576
577                 nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &node_1_2nd_reestablish);
578                 let node_0_msgs = nodes[0].node.get_and_clear_pending_msg_events();
579                 assert_eq!(node_0_msgs.len(), 2);
580                 let node_0_2nd_closing_signed = match node_0_msgs[1] {
581                         MessageSendEvent::SendClosingSigned { ref msg, .. } => {
582                                 assert_eq!(node_0_closing_signed, *msg);
583                                 msg.clone()
584                         },
585                         _ => panic!(),
586                 };
587
588                 let node_0_3rd_shutdown = match node_0_msgs[0] {
589                         MessageSendEvent::SendShutdown { ref msg, .. } => {
590                                 assert_eq!(node_0_2nd_shutdown, *msg);
591                                 msg.clone()
592                         },
593                         _ => panic!(),
594                 };
595                 assert!(node_0_2nd_shutdown == node_0_3rd_shutdown);
596
597                 nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &node_0_2nd_reestablish);
598                 let node_1_3rd_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
599                 assert!(node_1_3rd_shutdown == node_1_2nd_shutdown);
600
601                 nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_3rd_shutdown);
602                 assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
603
604                 nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_3rd_shutdown);
605
606                 nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_2nd_closing_signed);
607                 let node_1_closing_signed = get_event_msg!(nodes[1], MessageSendEvent::SendClosingSigned, nodes[0].node.get_our_node_id());
608                 nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &node_1_closing_signed);
609                 let (_, node_0_2nd_closing_signed) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
610                 nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_2nd_closing_signed.unwrap());
611                 let (_, node_1_none) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
612                 assert!(node_1_none.is_none());
613                 check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
614         } else {
615                 // If one node, however, received + responded with an identical closing_signed we end
616                 // up erroring and node[0] will try to broadcast its own latest commitment transaction.
617                 // There isn't really anything better we can do simply, but in the future we might
618                 // explore storing a set of recently-closed channels that got disconnected during
619                 // closing_signed and avoiding broadcasting local commitment txn for some timeout to
620                 // give our counterparty enough time to (potentially) broadcast a cooperative closing
621                 // transaction.
622                 assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
623
624                 nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &node_1_2nd_reestablish);
625                 let msg_events = nodes[0].node.get_and_clear_pending_msg_events();
626                 assert_eq!(msg_events.len(), 1);
627                 if let MessageSendEvent::HandleError { ref action, .. } = msg_events[0] {
628                         match action {
629                                 &ErrorAction::SendErrorMessage { ref msg } => {
630                                         nodes[1].node.handle_error(&nodes[0].node.get_our_node_id(), &msg);
631                                         assert_eq!(msg.channel_id, chan_1.2);
632                                 },
633                                 _ => panic!("Unexpected event!"),
634                         }
635                 } else { panic!("Needed SendErrorMessage close"); }
636
637                 // get_closing_signed_broadcast usually eats the BroadcastChannelUpdate for us and
638                 // checks it, but in this case nodes[1] didn't ever get a chance to receive a
639                 // closing_signed so we do it ourselves
640                 check_closed_broadcast!(nodes[1], false);
641                 check_added_monitors!(nodes[1], 1);
642                 check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyForceClosed { peer_msg: UntrustedString(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", &nodes[1].node.get_our_node_id())) }
643                         , [nodes[0].node.get_our_node_id()], 100000);
644         }
645
646         assert!(nodes[0].node.list_channels().is_empty());
647
648         assert_eq!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
649         nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
650         close_channel(&nodes[1], &nodes[2], &chan_2.2, chan_2.3, true);
651         assert!(nodes[1].node.list_channels().is_empty());
652         assert!(nodes[2].node.list_channels().is_empty());
653         check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
654         check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[2].node.get_our_node_id()], 100000);
655         check_closed_event!(nodes[2], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
656 }
657
658 #[test]
659 fn test_shutdown_rebroadcast() {
660         do_test_shutdown_rebroadcast(0);
661         do_test_shutdown_rebroadcast(1);
662         do_test_shutdown_rebroadcast(2);
663 }
664
665 #[test]
666 fn test_upfront_shutdown_script() {
667         // BOLT 2 : Option upfront shutdown script, if peer commit its closing_script at channel opening
668         // enforce it at shutdown message
669
670         let mut config = UserConfig::default();
671         config.channel_handshake_config.announced_channel = true;
672         config.channel_handshake_limits.force_announced_channel_preference = false;
673         config.channel_handshake_config.commit_upfront_shutdown_pubkey = false;
674         let user_cfgs = [None, Some(config), None];
675         let chanmon_cfgs = create_chanmon_cfgs(3);
676         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
677         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &user_cfgs);
678         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
679
680         // We test that in case of peer committing upfront to a script, if it changes at closing, we refuse to sign
681         let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 2, 1000000, 1000000);
682         nodes[0].node.close_channel(&OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id(), &nodes[2].node.get_our_node_id()).unwrap();
683         let node_0_orig_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[2].node.get_our_node_id());
684         let mut node_0_shutdown = node_0_orig_shutdown.clone();
685         node_0_shutdown.scriptpubkey = Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script().to_p2sh();
686         // Test we enforce upfront_scriptpbukey if by providing a different one at closing that we warn
687         // the peer and ignore the message.
688         nodes[2].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
689         assert!(regex::Regex::new(r"Got shutdown request with a scriptpubkey \([A-Fa-f0-9]+\) which did not match their previous scriptpubkey.")
690                         .unwrap().is_match(&check_warn_msg!(nodes[2], nodes[0].node.get_our_node_id(), chan.2)));
691         // This allows nodes[2] to retry the shutdown message, which should get a response:
692         nodes[2].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_orig_shutdown);
693         get_event_msg!(nodes[2], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
694
695         // We test that in case of peer committing upfront to a script, if it doesn't change at closing, we sign
696         let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 2, 1000000, 1000000);
697         nodes[0].node.close_channel(&OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id(), &nodes[2].node.get_our_node_id()).unwrap();
698         let node_0_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[2].node.get_our_node_id());
699         // We test that in case of peer committing upfront to a script, if it oesn't change at closing, we sign
700         nodes[2].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
701         let events = nodes[2].node.get_and_clear_pending_msg_events();
702         assert_eq!(events.len(), 1);
703         match events[0] {
704                 MessageSendEvent::SendShutdown { node_id, .. } => { assert_eq!(node_id, nodes[0].node.get_our_node_id()) }
705                 _ => panic!("Unexpected event"),
706         }
707
708         // We test that if case of peer non-signaling we don't enforce committed script at channel opening
709         *nodes[0].override_init_features.borrow_mut() = Some(nodes[0].node.init_features().clear_upfront_shutdown_script());
710         let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1000000, 1000000);
711         nodes[0].node.close_channel(&OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id(), &nodes[1].node.get_our_node_id()).unwrap();
712         let node_1_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
713         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_1_shutdown);
714         check_added_monitors!(nodes[1], 1);
715         let events = nodes[1].node.get_and_clear_pending_msg_events();
716         assert_eq!(events.len(), 1);
717         match events[0] {
718                 MessageSendEvent::SendShutdown { node_id, .. } => { assert_eq!(node_id, nodes[0].node.get_our_node_id()) }
719                 _ => panic!("Unexpected event"),
720         }
721
722         // We test that if user opt-out, we provide a zero-length script at channel opening and we are able to close
723         // channel smoothly, opt-out is from channel initiator here
724         *nodes[0].override_init_features.borrow_mut() = None;
725         let chan = create_announced_chan_between_nodes_with_value(&nodes, 1, 0, 1000000, 1000000);
726         nodes[1].node.close_channel(&OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id(), &nodes[0].node.get_our_node_id()).unwrap();
727         check_added_monitors!(nodes[1], 1);
728         let node_0_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
729         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_0_shutdown);
730         let events = nodes[0].node.get_and_clear_pending_msg_events();
731         assert_eq!(events.len(), 1);
732         match events[0] {
733                 MessageSendEvent::SendShutdown { node_id, .. } => { assert_eq!(node_id, nodes[1].node.get_our_node_id()) }
734                 _ => panic!("Unexpected event"),
735         }
736
737         //// We test that if user opt-out, we provide a zero-length script at channel opening and we are able to close
738         //// channel smoothly
739         let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1000000, 1000000);
740         nodes[1].node.close_channel(&OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id(), &nodes[0].node.get_our_node_id()).unwrap();
741         check_added_monitors!(nodes[1], 1);
742         let node_0_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
743         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_0_shutdown);
744         let events = nodes[0].node.get_and_clear_pending_msg_events();
745         assert_eq!(events.len(), 2);
746         match events[0] {
747                 MessageSendEvent::SendShutdown { node_id, .. } => { assert_eq!(node_id, nodes[1].node.get_our_node_id()) }
748                 _ => panic!("Unexpected event"),
749         }
750         match events[1] {
751                 MessageSendEvent::SendClosingSigned { node_id, .. } => { assert_eq!(node_id, nodes[1].node.get_our_node_id()) }
752                 _ => panic!("Unexpected event"),
753         }
754 }
755
756 #[test]
757 fn test_unsupported_anysegwit_upfront_shutdown_script() {
758         let chanmon_cfgs = create_chanmon_cfgs(2);
759         let mut node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
760         // Clear shutdown_anysegwit on initiator
761         *node_cfgs[0].override_init_features.borrow_mut() = Some(channelmanager::provided_init_features(&test_default_channel_config()).clear_shutdown_anysegwit());
762         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
763         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
764
765         // Use a non-v0 segwit script supported by option_shutdown_anysegwit
766         let anysegwit_shutdown_script = Builder::new()
767                 .push_int(16)
768                 .push_slice(&[0, 40])
769                 .into_script();
770
771         // Check script when handling an open_channel message
772         nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 100000, 10001, 42, None).unwrap();
773         let mut open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
774         open_channel.shutdown_scriptpubkey = Some(anysegwit_shutdown_script.clone());
775         nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel);
776
777         let events = nodes[1].node.get_and_clear_pending_msg_events();
778         assert_eq!(events.len(), 1);
779         match events[0] {
780                 MessageSendEvent::HandleError { action: ErrorAction::SendErrorMessage { ref msg }, node_id } => {
781                         assert_eq!(node_id, nodes[0].node.get_our_node_id());
782                         assert_eq!(msg.data, "Peer is signaling upfront_shutdown but has provided an unacceptable scriptpubkey format: Script(OP_PUSHNUM_16 OP_PUSHBYTES_2 0028)");
783                 },
784                 _ => panic!("Unexpected event"),
785         }
786
787         let chanmon_cfgs = create_chanmon_cfgs(2);
788         let mut node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
789         // Clear shutdown_anysegwit on responder
790         *node_cfgs[1].override_init_features.borrow_mut() = Some(channelmanager::provided_init_features(&test_default_channel_config()).clear_shutdown_anysegwit());
791         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
792         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
793
794         // Check script when handling an accept_channel message
795         nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 100000, 10001, 42, None).unwrap();
796         let open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
797         nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel);
798         let mut accept_channel = get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, nodes[0].node.get_our_node_id());
799         accept_channel.shutdown_scriptpubkey = Some(anysegwit_shutdown_script.clone());
800         nodes[0].node.handle_accept_channel(&nodes[1].node.get_our_node_id(), &accept_channel);
801
802         let events = nodes[0].node.get_and_clear_pending_msg_events();
803         assert_eq!(events.len(), 1);
804         match events[0] {
805                 MessageSendEvent::HandleError { action: ErrorAction::SendErrorMessage { ref msg }, node_id } => {
806                         assert_eq!(node_id, nodes[1].node.get_our_node_id());
807                         assert_eq!(msg.data, "Peer is signaling upfront_shutdown but has provided an unacceptable scriptpubkey format: Script(OP_PUSHNUM_16 OP_PUSHBYTES_2 0028)");
808                 },
809                 _ => panic!("Unexpected event"),
810         }
811         check_closed_event!(nodes[0], 1, ClosureReason::ProcessingError { err: "Peer is signaling upfront_shutdown but has provided an unacceptable scriptpubkey format: Script(OP_PUSHNUM_16 OP_PUSHBYTES_2 0028)".to_string() }
812                 , [nodes[1].node.get_our_node_id()], 100000);
813 }
814
815 #[test]
816 fn test_invalid_upfront_shutdown_script() {
817         let chanmon_cfgs = create_chanmon_cfgs(2);
818         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
819         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
820         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
821
822         nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 100000, 10001, 42, None).unwrap();
823
824         // Use a segwit v0 script with an unsupported witness program
825         let mut open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
826         open_channel.shutdown_scriptpubkey = Some(Builder::new().push_int(0)
827                 .push_slice(&[0, 0])
828                 .into_script());
829         nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel);
830
831         let events = nodes[1].node.get_and_clear_pending_msg_events();
832         assert_eq!(events.len(), 1);
833         match events[0] {
834                 MessageSendEvent::HandleError { action: ErrorAction::SendErrorMessage { ref msg }, node_id } => {
835                         assert_eq!(node_id, nodes[0].node.get_our_node_id());
836                         assert_eq!(msg.data, "Peer is signaling upfront_shutdown but has provided an unacceptable scriptpubkey format: Script(OP_0 OP_PUSHBYTES_2 0000)");
837                 },
838                 _ => panic!("Unexpected event"),
839         }
840 }
841
842 #[test]
843 fn test_segwit_v0_shutdown_script() {
844         let mut config = UserConfig::default();
845         config.channel_handshake_config.announced_channel = true;
846         config.channel_handshake_limits.force_announced_channel_preference = false;
847         config.channel_handshake_config.commit_upfront_shutdown_pubkey = false;
848         let user_cfgs = [None, Some(config), None];
849         let chanmon_cfgs = create_chanmon_cfgs(3);
850         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
851         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &user_cfgs);
852         let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
853
854         let chan = create_announced_chan_between_nodes(&nodes, 0, 1);
855         nodes[1].node.close_channel(&OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id(), &nodes[0].node.get_our_node_id()).unwrap();
856         check_added_monitors!(nodes[1], 1);
857
858         // Use a segwit v0 script supported even without option_shutdown_anysegwit
859         let mut node_0_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
860         node_0_shutdown.scriptpubkey = Builder::new().push_int(0)
861                 .push_slice(&[0; 20])
862                 .into_script();
863         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_0_shutdown);
864
865         let events = nodes[0].node.get_and_clear_pending_msg_events();
866         assert_eq!(events.len(), 2);
867         match events[0] {
868                 MessageSendEvent::SendShutdown { node_id, .. } => { assert_eq!(node_id, nodes[1].node.get_our_node_id()) }
869                 _ => panic!("Unexpected event"),
870         }
871         match events[1] {
872                 MessageSendEvent::SendClosingSigned { node_id, .. } => { assert_eq!(node_id, nodes[1].node.get_our_node_id()) }
873                 _ => panic!("Unexpected event"),
874         }
875 }
876
877 #[test]
878 fn test_anysegwit_shutdown_script() {
879         let mut config = UserConfig::default();
880         config.channel_handshake_config.announced_channel = true;
881         config.channel_handshake_limits.force_announced_channel_preference = false;
882         config.channel_handshake_config.commit_upfront_shutdown_pubkey = false;
883         let user_cfgs = [None, Some(config), None];
884         let chanmon_cfgs = create_chanmon_cfgs(3);
885         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
886         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &user_cfgs);
887         let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
888
889         let chan = create_announced_chan_between_nodes(&nodes, 0, 1);
890         nodes[1].node.close_channel(&OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id(), &nodes[0].node.get_our_node_id()).unwrap();
891         check_added_monitors!(nodes[1], 1);
892
893         // Use a non-v0 segwit script supported by option_shutdown_anysegwit
894         let mut node_0_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
895         node_0_shutdown.scriptpubkey = Builder::new().push_int(16)
896                 .push_slice(&[0, 0])
897                 .into_script();
898         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_0_shutdown);
899
900         let events = nodes[0].node.get_and_clear_pending_msg_events();
901         assert_eq!(events.len(), 2);
902         match events[0] {
903                 MessageSendEvent::SendShutdown { node_id, .. } => { assert_eq!(node_id, nodes[1].node.get_our_node_id()) }
904                 _ => panic!("Unexpected event"),
905         }
906         match events[1] {
907                 MessageSendEvent::SendClosingSigned { node_id, .. } => { assert_eq!(node_id, nodes[1].node.get_our_node_id()) }
908                 _ => panic!("Unexpected event"),
909         }
910 }
911
912 #[test]
913 fn test_unsupported_anysegwit_shutdown_script() {
914         let mut config = UserConfig::default();
915         config.channel_handshake_config.announced_channel = true;
916         config.channel_handshake_limits.force_announced_channel_preference = false;
917         config.channel_handshake_config.commit_upfront_shutdown_pubkey = false;
918         let user_cfgs = [None, Some(config), None];
919         let chanmon_cfgs = create_chanmon_cfgs(3);
920         let mut node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
921         *node_cfgs[0].override_init_features.borrow_mut() = Some(channelmanager::provided_init_features(&config).clear_shutdown_anysegwit());
922         *node_cfgs[1].override_init_features.borrow_mut() = Some(channelmanager::provided_init_features(&config).clear_shutdown_anysegwit());
923         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &user_cfgs);
924         let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
925
926         // Check that using an unsupported shutdown script fails and a supported one succeeds.
927         let supported_shutdown_script = chanmon_cfgs[1].keys_manager.get_shutdown_scriptpubkey().unwrap();
928         let unsupported_shutdown_script =
929                 ShutdownScript::new_witness_program(WitnessVersion::V16, &[0, 40]).unwrap();
930         chanmon_cfgs[1].keys_manager
931                 .expect(OnGetShutdownScriptpubkey { returns: unsupported_shutdown_script.clone() })
932                 .expect(OnGetShutdownScriptpubkey { returns: supported_shutdown_script });
933
934         let chan = create_announced_chan_between_nodes(&nodes, 0, 1);
935         match nodes[1].node.close_channel(&OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id(), &nodes[0].node.get_our_node_id()) {
936                 Err(APIError::IncompatibleShutdownScript { script }) => {
937                         assert_eq!(script.into_inner(), unsupported_shutdown_script.clone().into_inner());
938                 },
939                 Err(e) => panic!("Unexpected error: {:?}", e),
940                 Ok(_) => panic!("Expected error"),
941         }
942         nodes[1].node.close_channel(&OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id(), &nodes[0].node.get_our_node_id()).unwrap();
943         check_added_monitors!(nodes[1], 1);
944
945         // Use a non-v0 segwit script unsupported without option_shutdown_anysegwit
946         let mut node_0_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
947         node_0_shutdown.scriptpubkey = unsupported_shutdown_script.into_inner();
948         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_0_shutdown);
949
950         assert_eq!(&check_warn_msg!(nodes[0], nodes[1].node.get_our_node_id(), chan.2),
951                         "Got a nonstandard scriptpubkey (60020028) from remote peer");
952 }
953
954 #[test]
955 fn test_invalid_shutdown_script() {
956         let mut config = UserConfig::default();
957         config.channel_handshake_config.announced_channel = true;
958         config.channel_handshake_limits.force_announced_channel_preference = false;
959         config.channel_handshake_config.commit_upfront_shutdown_pubkey = false;
960         let user_cfgs = [None, Some(config), None];
961         let chanmon_cfgs = create_chanmon_cfgs(3);
962         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
963         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &user_cfgs);
964         let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
965
966         let chan = create_announced_chan_between_nodes(&nodes, 0, 1);
967         nodes[1].node.close_channel(&OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id(), &nodes[0].node.get_our_node_id()).unwrap();
968         check_added_monitors!(nodes[1], 1);
969
970         // Use a segwit v0 script with an unsupported witness program
971         let mut node_0_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
972         node_0_shutdown.scriptpubkey = Builder::new().push_int(0)
973                 .push_slice(&[0, 0])
974                 .into_script();
975         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_0_shutdown);
976
977         assert_eq!(&check_warn_msg!(nodes[0], nodes[1].node.get_our_node_id(), chan.2),
978                         "Got a nonstandard scriptpubkey (00020000) from remote peer");
979 }
980
981 #[test]
982 fn test_user_shutdown_script() {
983         let mut config = test_default_channel_config();
984         config.channel_handshake_config.announced_channel = true;
985         config.channel_handshake_limits.force_announced_channel_preference = false;
986         config.channel_handshake_config.commit_upfront_shutdown_pubkey = false;
987         let user_cfgs = [None, Some(config), None];
988         let chanmon_cfgs = create_chanmon_cfgs(3);
989         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
990         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &user_cfgs);
991         let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
992
993         // Segwit v0 script of the form OP_0 <20-byte hash>
994         let script = Builder::new().push_int(0)
995                 .push_slice(&[0; 20])
996                 .into_script();
997
998         let shutdown_script = ShutdownScript::try_from(script.clone()).unwrap();
999
1000         let chan = create_announced_chan_between_nodes(&nodes, 0, 1);
1001         nodes[1].node.close_channel_with_feerate_and_script(&OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id(), &nodes[0].node.get_our_node_id(), None, Some(shutdown_script)).unwrap();
1002         check_added_monitors!(nodes[1], 1);
1003
1004         let mut node_0_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
1005
1006         assert_eq!(node_0_shutdown.scriptpubkey, script);
1007 }
1008
1009 #[test]
1010 fn test_already_set_user_shutdown_script() {
1011         let mut config = test_default_channel_config();
1012         config.channel_handshake_config.announced_channel = true;
1013         config.channel_handshake_limits.force_announced_channel_preference = false;
1014         let user_cfgs = [None, Some(config), None];
1015         let chanmon_cfgs = create_chanmon_cfgs(3);
1016         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
1017         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &user_cfgs);
1018         let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
1019
1020         // Segwit v0 script of the form OP_0 <20-byte hash>
1021         let script = Builder::new().push_int(0)
1022                 .push_slice(&[0; 20])
1023                 .into_script();
1024
1025         let shutdown_script = ShutdownScript::try_from(script).unwrap();
1026
1027         let chan = create_announced_chan_between_nodes(&nodes, 0, 1);
1028         let result = nodes[1].node.close_channel_with_feerate_and_script(&OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id(), &nodes[0].node.get_our_node_id(), None, Some(shutdown_script));
1029
1030         assert_eq!(result, Err(APIError::APIMisuseError { err: "Cannot override shutdown script for a channel with one already set".to_string() }));
1031 }
1032
1033 #[derive(PartialEq)]
1034 enum TimeoutStep {
1035         AfterShutdown,
1036         AfterClosingSigned,
1037         NoTimeout,
1038 }
1039
1040 fn do_test_closing_signed_reinit_timeout(timeout_step: TimeoutStep) {
1041         // The range-based closing signed negotiation allows the funder to restart the process with a
1042         // new range if the previous range did not overlap. This allows implementations to request user
1043         // intervention allowing users to enter a new fee range. We do not implement the sending side
1044         // of this, instead opting to allow users to enter an explicit "willing to pay up to X to avoid
1045         // force-closing" value and relying on that instead.
1046         //
1047         // Here we run test the fundee side of that restart mechanism, implementing the funder side of
1048         // it manually.
1049         let chanmon_cfgs = create_chanmon_cfgs(2);
1050         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1051         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
1052         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1053         let chan_id = create_announced_chan_between_nodes(&nodes, 0, 1).2;
1054
1055         send_payment(&nodes[0], &[&nodes[1]], 8_000_000);
1056
1057         nodes[0].node.close_channel(&chan_id, &nodes[1].node.get_our_node_id()).unwrap();
1058         let node_0_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
1059         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
1060         let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
1061         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
1062
1063         {
1064                 // Now we set nodes[1] to require a relatively high feerate for closing. This should result
1065                 // in it rejecting nodes[0]'s initial closing_signed, giving nodes[0] a chance to try
1066                 // again.
1067                 let mut feerate_lock = chanmon_cfgs[1].fee_estimator.sat_per_kw.lock().unwrap();
1068                 *feerate_lock *= 10;
1069         }
1070
1071         let mut node_0_closing_signed = get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id());
1072         // nodes[0] should use a "reasonable" feerate, well under the 10 sat/vByte that nodes[1] thinks
1073         // is the current prevailing feerate.
1074         assert!(node_0_closing_signed.fee_satoshis <= 500);
1075
1076         if timeout_step != TimeoutStep::AfterShutdown {
1077                 nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_closing_signed);
1078                 assert!(check_warn_msg!(nodes[1], nodes[0].node.get_our_node_id(), chan_id)
1079                         .starts_with("Unable to come to consensus about closing feerate"));
1080
1081                 // Now deliver a mutated closing_signed indicating a higher acceptable fee range, which
1082                 // nodes[1] should happily accept and respond to.
1083                 node_0_closing_signed.fee_range.as_mut().unwrap().max_fee_satoshis *= 10;
1084                 {
1085                         let mut node_0_per_peer_lock;
1086                         let mut node_0_peer_state_lock;
1087                         get_channel_ref!(nodes[0], nodes[1], node_0_per_peer_lock, node_0_peer_state_lock, chan_id).context_mut().closing_fee_limits.as_mut().unwrap().1 *= 10;
1088                 }
1089                 nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_closing_signed);
1090                 let node_1_closing_signed = get_event_msg!(nodes[1], MessageSendEvent::SendClosingSigned, nodes[0].node.get_our_node_id());
1091                 nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &node_1_closing_signed);
1092                 let node_0_2nd_closing_signed = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
1093                 if timeout_step == TimeoutStep::NoTimeout {
1094                         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_2nd_closing_signed.1.unwrap());
1095                         check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
1096                 }
1097                 check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
1098         }
1099
1100         if timeout_step != TimeoutStep::NoTimeout {
1101                 assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
1102         } else {
1103                 assert_eq!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
1104         }
1105
1106         nodes[1].node.timer_tick_occurred();
1107         nodes[1].node.timer_tick_occurred();
1108
1109         let txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clone();
1110         assert_eq!(txn.len(), 1);
1111         assert_eq!(txn[0].output.len(), 2);
1112
1113         if timeout_step != TimeoutStep::NoTimeout {
1114                 assert!((txn[0].output[0].script_pubkey.is_v0_p2wpkh() &&
1115                          txn[0].output[1].script_pubkey.is_v0_p2wsh()) ||
1116                         (txn[0].output[1].script_pubkey.is_v0_p2wpkh() &&
1117                          txn[0].output[0].script_pubkey.is_v0_p2wsh()));
1118                 check_closed_broadcast!(nodes[1], true);
1119                 check_added_monitors!(nodes[1], 1);
1120                 check_closed_event!(nodes[1], 1, ClosureReason::ProcessingError { err: "closing_signed negotiation failed to finish within two timer ticks".to_string() }
1121                         , [nodes[0].node.get_our_node_id()], 100000);
1122         } else {
1123                 assert!(txn[0].output[0].script_pubkey.is_v0_p2wpkh());
1124                 assert!(txn[0].output[1].script_pubkey.is_v0_p2wpkh());
1125
1126                 let events = nodes[1].node.get_and_clear_pending_msg_events();
1127                 assert_eq!(events.len(), 1);
1128                 match events[0] {
1129                         MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
1130                                 assert_eq!(msg.contents.flags & 2, 2);
1131                         },
1132                         _ => panic!("Unexpected event"),
1133                 }
1134         }
1135 }
1136
1137 #[test]
1138 fn test_closing_signed_reinit_timeout() {
1139         do_test_closing_signed_reinit_timeout(TimeoutStep::AfterShutdown);
1140         do_test_closing_signed_reinit_timeout(TimeoutStep::AfterClosingSigned);
1141         do_test_closing_signed_reinit_timeout(TimeoutStep::NoTimeout);
1142 }
1143
1144 fn do_simple_legacy_shutdown_test(high_initiator_fee: bool) {
1145         // A simpe test of the legacy shutdown fee negotiation logic.
1146         let chanmon_cfgs = create_chanmon_cfgs(2);
1147         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1148         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
1149         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1150
1151         let chan = create_announced_chan_between_nodes(&nodes, 0, 1);
1152
1153         if high_initiator_fee {
1154                 // If high_initiator_fee is set, set nodes[0]'s feerate significantly higher. This
1155                 // shouldn't impact the flow at all given nodes[1] will happily accept the higher fee.
1156                 let mut feerate_lock = chanmon_cfgs[0].fee_estimator.sat_per_kw.lock().unwrap();
1157                 *feerate_lock *= 10;
1158         }
1159
1160         nodes[0].node.close_channel(&OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id(), &nodes[1].node.get_our_node_id()).unwrap();
1161         let node_0_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
1162         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
1163         let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
1164         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
1165
1166         let mut node_0_closing_signed = get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id());
1167         node_0_closing_signed.fee_range = None;
1168         if high_initiator_fee {
1169                 assert!(node_0_closing_signed.fee_satoshis > 500);
1170         } else {
1171                 assert!(node_0_closing_signed.fee_satoshis < 500);
1172         }
1173
1174         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_closing_signed);
1175         let (_, mut node_1_closing_signed) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
1176         node_1_closing_signed.as_mut().unwrap().fee_range = None;
1177
1178         nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &node_1_closing_signed.unwrap());
1179         let (_, node_0_none) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
1180         assert!(node_0_none.is_none());
1181         check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
1182         check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
1183 }
1184
1185 #[test]
1186 fn simple_legacy_shutdown_test() {
1187         do_simple_legacy_shutdown_test(false);
1188         do_simple_legacy_shutdown_test(true);
1189 }
1190
1191 #[test]
1192 fn simple_target_feerate_shutdown() {
1193         // Simple test of target in `close_channel_with_target_feerate`.
1194         let chanmon_cfgs = create_chanmon_cfgs(2);
1195         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1196         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
1197         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1198
1199         let chan = create_announced_chan_between_nodes(&nodes, 0, 1);
1200         let chan_id = OutPoint { txid: chan.3.txid(), index: 0 }.to_channel_id();
1201
1202         nodes[0].node.close_channel_with_feerate_and_script(&chan_id, &nodes[1].node.get_our_node_id(), Some(253 * 10), None).unwrap();
1203         let node_0_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
1204         nodes[1].node.close_channel_with_feerate_and_script(&chan_id, &nodes[0].node.get_our_node_id(), Some(253 * 5), None).unwrap();
1205         let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
1206
1207         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
1208         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
1209
1210         let node_0_closing_signed = get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id());
1211         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_closing_signed);
1212         let (_, node_1_closing_signed_opt) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
1213         let node_1_closing_signed = node_1_closing_signed_opt.unwrap();
1214
1215         // nodes[1] was passed a target which was larger than the current channel feerate, which it
1216         // should ignore in favor of the channel fee, as there is no use demanding a minimum higher
1217         // than what will be paid on a force-close transaction. Note that we have to consider rounding,
1218         // so only check that we're within 10 sats.
1219         assert!(node_0_closing_signed.fee_range.as_ref().unwrap().min_fee_satoshis >=
1220                 node_1_closing_signed.fee_range.as_ref().unwrap().min_fee_satoshis * 10 - 5);
1221         assert!(node_0_closing_signed.fee_range.as_ref().unwrap().min_fee_satoshis <=
1222                 node_1_closing_signed.fee_range.as_ref().unwrap().min_fee_satoshis * 10 + 5);
1223
1224         // Further, because nodes[0]'s target fee is larger than the `Normal` fee estimation plus our
1225         // force-closure-avoidance buffer, min should equal max, and the nodes[1]-selected fee should
1226         // be the nodes[0] only available fee.
1227         assert_eq!(node_0_closing_signed.fee_range.as_ref().unwrap().min_fee_satoshis,
1228                    node_0_closing_signed.fee_range.as_ref().unwrap().max_fee_satoshis);
1229         assert_eq!(node_0_closing_signed.fee_range.as_ref().unwrap().min_fee_satoshis,
1230                    node_0_closing_signed.fee_satoshis);
1231         assert_eq!(node_0_closing_signed.fee_satoshis, node_1_closing_signed.fee_satoshis);
1232
1233         nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &node_1_closing_signed);
1234         let (_, node_0_none) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
1235         assert!(node_0_none.is_none());
1236         check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 100000);
1237         check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 100000);
1238 }