_ Git - rust-lightning/blob - 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         // P2WSH
 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 }