_ Git - rust-lightning/blob - lightning/src/ln/reorg_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 //! Further functional tests which test blockchain reorganizations.
  11
  12 use crate::chain::channelmonitor::{ANTI_REORG_DELAY, ChannelMonitor};
  13 use crate::chain::transaction::OutPoint;
  14 use crate::chain::{ChannelMonitorUpdateStatus, Confirm, Watch};
  15 use crate::ln::channelmanager::{self, ChannelManager, ChannelManagerReadArgs};
  16 use crate::ln::msgs::ChannelMessageHandler;
  17 use crate::util::enforcing_trait_impls::EnforcingSigner;
  18 use crate::util::events::{Event, MessageSendEvent, MessageSendEventsProvider, ClosureReason, HTLCDestination};
  19 use crate::util::test_utils;
  20 use crate::util::ser::{ReadableArgs, Writeable};
  21
  22 use bitcoin::blockdata::block::{Block, BlockHeader};
  23 use bitcoin::blockdata::script::Builder;
  24 use bitcoin::blockdata::opcodes;
  25 use bitcoin::hash_types::BlockHash;
  26 use bitcoin::secp256k1::Secp256k1;
  27
  28 use crate::prelude::*;
  29 use core::mem;
  30 use bitcoin::hashes::Hash;
  31 use bitcoin::TxMerkleNode;
  32
  33 use crate::ln::functional_test_utils::*;
  34
  35 fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) {
  36         // Our on-chain HTLC-claim learning has a few properties worth testing:
  37         //  * If an upstream HTLC is claimed with a preimage (both against our own commitment
  38         //    transaction our counterparty's), we claim it backwards immediately.
  39         //  * If an upstream HTLC is claimed with a timeout, we delay ANTI_REORG_DELAY before failing
  40         //    it backwards to ensure our counterparty can't claim with a preimage in a reorg.
  41         //
  42         // Here we test both properties in any combination based on the two bools passed in as
  43         // arguments.
  44         //
  45         // If local_commitment is set, we first broadcast a local commitment containing an offered HTLC
  46         // and an HTLC-Timeout tx, otherwise we broadcast a remote commitment containing a received
  47         // HTLC and a local HTLC-Timeout tx spending it.
  48         //
  49         // We then either allow these transactions to confirm (if !claim) or we wait until one block
  50         // before they otherwise would and reorg them out, confirming an HTLC-Success tx instead.
  51         let chanmon_cfgs = create_chanmon_cfgs(3);
  52         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
  53         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
  54         let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
  55
  56         create_announced_chan_between_nodes(&nodes, 0, 1, channelmanager::provided_init_features(), channelmanager::provided_init_features());
  57         let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, channelmanager::provided_init_features(), channelmanager::provided_init_features());
  58
  59         // Make sure all nodes are at the same starting height
  60         connect_blocks(&nodes[0], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[0].best_block_info().1);
  61         connect_blocks(&nodes[1], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[1].best_block_info().1);
  62         connect_blocks(&nodes[2], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[2].best_block_info().1);
  63
  64         let (our_payment_preimage, our_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1_000_000);
  65
  66         // Provide preimage to node 2 by claiming payment
  67         nodes[2].node.claim_funds(our_payment_preimage);
  68         expect_payment_claimed!(nodes[2], our_payment_hash, 1_000_000);
  69         check_added_monitors!(nodes[2], 1);
  70         get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
  71
  72         let mut header = BlockHeader { version: 0x2000_0000, prev_blockhash: nodes[2].best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: 42, bits: 42, nonce: 42 };
  73         let claim_txn = if local_commitment {
  74                 // Broadcast node 1 commitment txn to broadcast the HTLC-Timeout
  75                 let node_1_commitment_txn = get_local_commitment_txn!(nodes[1], chan_2.2);
  76                 assert_eq!(node_1_commitment_txn.len(), 2); // 1 local commitment tx, 1 Outbound HTLC-Timeout
  77                 assert_eq!(node_1_commitment_txn[0].output.len(), 2); // to-self and Offered HTLC (to-remote/to-node-3 is dust)
  78                 check_spends!(node_1_commitment_txn[0], chan_2.3);
  79                 check_spends!(node_1_commitment_txn[1], node_1_commitment_txn[0]);
  80
  81                 // Give node 2 node 1's transactions and get its response (claiming the HTLC instead).
  82                 connect_block(&nodes[2], &Block { header, txdata: node_1_commitment_txn.clone() });
  83                 check_added_monitors!(nodes[2], 1);
  84                 check_closed_broadcast!(nodes[2], true); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate)
  85                 check_closed_event!(nodes[2], 1, ClosureReason::CommitmentTxConfirmed);
  86                 let node_2_commitment_txn = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
  87                 assert_eq!(node_2_commitment_txn.len(), 3); // ChannelMonitor: 1 offered HTLC-Claim, ChannelManger: 1 local commitment tx, 1 Received HTLC-Claim
  88                 assert_eq!(node_2_commitment_txn[1].output.len(), 2); // to-remote and Received HTLC (to-self is dust)
  89                 check_spends!(node_2_commitment_txn[1], chan_2.3);
  90                 check_spends!(node_2_commitment_txn[2], node_2_commitment_txn[1]);
  91                 check_spends!(node_2_commitment_txn[0], node_1_commitment_txn[0]);
  92
  93                 // Make sure node 1's height is the same as the !local_commitment case
  94                 connect_blocks(&nodes[1], 1);
  95                 // Confirm node 1's commitment txn (and HTLC-Timeout) on node 1
  96                 header.prev_blockhash = nodes[1].best_block_hash();
  97                 connect_block(&nodes[1], &Block { header, txdata: node_1_commitment_txn.clone() });
  98
  99                 // ...but return node 1's commitment tx in case claim is set and we're preparing to reorg
 100                 vec![node_1_commitment_txn[0].clone(), node_2_commitment_txn[0].clone()]
 101         } else {
 102                 // Broadcast node 2 commitment txn
 103                 let mut node_2_commitment_txn = get_local_commitment_txn!(nodes[2], chan_2.2);
 104                 assert_eq!(node_2_commitment_txn.len(), 2); // 1 local commitment tx, 1 Received HTLC-Claim
 105                 assert_eq!(node_2_commitment_txn[0].output.len(), 2); // to-remote and Received HTLC (to-self is dust)
 106                 check_spends!(node_2_commitment_txn[0], chan_2.3);
 107                 check_spends!(node_2_commitment_txn[1], node_2_commitment_txn[0]);
 108
 109                 // Give node 1 node 2's commitment transaction and get its response (timing the HTLC out)
 110                 mine_transaction(&nodes[1], &node_2_commitment_txn[0]);
 111                 connect_blocks(&nodes[1], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
 112                 let node_1_commitment_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clone();
 113                 assert_eq!(node_1_commitment_txn.len(), 2); // ChannelMonitor: 1 offered HTLC-Timeout, ChannelManger: 1 local commitment tx
 114                 assert_eq!(node_1_commitment_txn[0].output.len(), 2); // to-local and Offered HTLC (to-remote is dust)
 115                 check_spends!(node_1_commitment_txn[0], chan_2.3);
 116                 check_spends!(node_1_commitment_txn[1], node_2_commitment_txn[0]);
 117
 118                 // Confirm node 1's HTLC-Timeout on node 1
 119                 mine_transaction(&nodes[1], &node_1_commitment_txn[1]);
 120                 // ...but return node 2's commitment tx (and claim) in case claim is set and we're preparing to reorg
 121                 vec![node_2_commitment_txn.pop().unwrap()]
 122         };
 123         check_added_monitors!(nodes[1], 1);
 124         check_closed_broadcast!(nodes[1], true); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate)
 125         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
 126         // Connect ANTI_REORG_DELAY - 2 blocks, giving us a confirmation count of ANTI_REORG_DELAY - 1.
 127         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
 128         check_added_monitors!(nodes[1], 0);
 129         assert_eq!(nodes[1].node.get_and_clear_pending_events().len(), 0);
 130
 131         if claim {
 132                 // Disconnect Node 1's HTLC-Timeout which was connected above
 133                 disconnect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 134
 135                 let block = Block {
 136                         header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: 42, bits: 42, nonce: 42 },
 137                         txdata: claim_txn,
 138                 };
 139                 connect_block(&nodes[1], &block);
 140
 141                 // ChannelManager only polls chain::Watch::release_pending_monitor_events when we
 142                 // probe it for events, so we probe non-message events here (which should just be the
 143                 // PaymentForwarded event).
 144                 expect_payment_forwarded!(nodes[1], nodes[0], nodes[2], Some(1000), true, true);
 145         } else {
 146                 // Confirm the timeout tx and check that we fail the HTLC backwards
 147                 let block = Block {
 148                         header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: 42, bits: 42, nonce: 42 },
 149                         txdata: vec![],
 150                 };
 151                 connect_block(&nodes[1], &block);
 152                 expect_pending_htlcs_forwardable_and_htlc_handling_failed!(nodes[1], vec![HTLCDestination::NextHopChannel { node_id: Some(nodes[2].node.get_our_node_id()), channel_id: chan_2.2 }]);
 153         }
 154
 155         check_added_monitors!(nodes[1], 1);
 156         // Which should result in an immediate claim/fail of the HTLC:
 157         let htlc_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 158         if claim {
 159                 assert_eq!(htlc_updates.update_fulfill_htlcs.len(), 1);
 160                 nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &htlc_updates.update_fulfill_htlcs[0]);
 161         } else {
 162                 assert_eq!(htlc_updates.update_fail_htlcs.len(), 1);
 163                 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_updates.update_fail_htlcs[0]);
 164         }
 165         commitment_signed_dance!(nodes[0], nodes[1], htlc_updates.commitment_signed, false, true);
 166         if claim {
 167                 expect_payment_sent!(nodes[0], our_payment_preimage);
 168         } else {
 169                 expect_payment_failed_with_update!(nodes[0], our_payment_hash, false, chan_2.0.contents.short_channel_id, true);
 170         }
 171 }
 172
 173 #[test]
 174 fn test_onchain_htlc_claim_reorg_local_commitment() {
 175         do_test_onchain_htlc_reorg(true, true);
 176 }
 177 #[test]
 178 fn test_onchain_htlc_timeout_delay_local_commitment() {
 179         do_test_onchain_htlc_reorg(true, false);
 180 }
 181 #[test]
 182 fn test_onchain_htlc_claim_reorg_remote_commitment() {
 183         do_test_onchain_htlc_reorg(false, true);
 184 }
 185 #[test]
 186 fn test_onchain_htlc_timeout_delay_remote_commitment() {
 187         do_test_onchain_htlc_reorg(false, false);
 188 }
 189
 190 #[test]
 191 fn test_counterparty_revoked_reorg() {
 192         // Test what happens when a revoked counterparty transaction is broadcast but then reorg'd out
 193         // of the main chain. Specifically, HTLCs in the latest commitment transaction which are not
 194         // included in the revoked commitment transaction should not be considered failed, and should
 195         // still be claim-from-able after the reorg.
 196         let chanmon_cfgs = create_chanmon_cfgs(2);
 197         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 198         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 199         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 200
 201         let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 500_000_000, channelmanager::provided_init_features(), channelmanager::provided_init_features());
 202
 203         // Get the initial commitment transaction for broadcast, before any HTLCs are added at all.
 204         let revoked_local_txn = get_local_commitment_txn!(nodes[0], chan.2);
 205         assert_eq!(revoked_local_txn.len(), 1);
 206
 207         // Now add two HTLCs in each direction, one dust and one not.
 208         route_payment(&nodes[0], &[&nodes[1]], 5_000_000);
 209         route_payment(&nodes[0], &[&nodes[1]], 5_000);
 210         let (payment_preimage_3, payment_hash_3, ..) = route_payment(&nodes[1], &[&nodes[0]], 4_000_000);
 211         let payment_hash_4 = route_payment(&nodes[1], &[&nodes[0]], 4_000).1;
 212
 213         nodes[0].node.claim_funds(payment_preimage_3);
 214         let _ = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
 215         check_added_monitors!(nodes[0], 1);
 216         expect_payment_claimed!(nodes[0], payment_hash_3, 4_000_000);
 217
 218         let mut unrevoked_local_txn = get_local_commitment_txn!(nodes[0], chan.2);
 219         assert_eq!(unrevoked_local_txn.len(), 3); // commitment + 2 HTLC txn
 220         // Sort the unrevoked transactions in reverse order, ie commitment tx, then HTLC 1 then HTLC 3
 221         unrevoked_local_txn.sort_unstable_by_key(|tx| 1_000_000 - tx.output.iter().map(|outp| outp.value).sum::<u64>());
 222
 223         // Now mine A's old commitment transaction, which should close the channel, but take no action
 224         // on any of the HTLCs, at least until we get six confirmations (which we won't get).
 225         mine_transaction(&nodes[1], &revoked_local_txn[0]);
 226         check_added_monitors!(nodes[1], 1);
 227         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
 228         check_closed_broadcast!(nodes[1], true);
 229
 230         // Connect up to one block before the revoked transaction would be considered final, then do a
 231         // reorg that disconnects the full chain and goes up to the height at which the revoked
 232         // transaction would be final.
 233         let theoretical_conf_height = nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1;
 234         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
 235         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 236         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 237
 238         disconnect_all_blocks(&nodes[1]);
 239         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 240         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 241
 242         connect_blocks(&nodes[1], theoretical_conf_height);
 243         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 244         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 245
 246         // Now connect A's latest commitment transaction instead and resolve the HTLCs
 247         mine_transaction(&nodes[1], &unrevoked_local_txn[0]);
 248         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 249         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 250
 251         // Connect the HTLC claim transaction for HTLC 3
 252         mine_transaction(&nodes[1], &unrevoked_local_txn[2]);
 253         expect_payment_sent!(nodes[1], payment_preimage_3);
 254         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 255
 256         // Connect blocks to confirm the unrevoked commitment transaction
 257         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
 258         expect_payment_failed!(nodes[1], payment_hash_4, false);
 259 }
 260
 261 fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_unconfirmed: bool, connect_style: ConnectStyle) {
 262         // After creating a chan between nodes, we disconnect all blocks previously seen to force a
 263         // channel close on nodes[0] side. We also use this to provide very basic testing of logic
 264         // around freeing background events which store monitor updates during block_[dis]connected.
 265         let chanmon_cfgs = create_chanmon_cfgs(2);
 266         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 267         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 268         let persister: test_utils::TestPersister;
 269         let new_chain_monitor: test_utils::TestChainMonitor;
 270         let nodes_0_deserialized: ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>;
 271         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 272         *nodes[0].connect_style.borrow_mut() = connect_style;
 273
 274         let chan_conf_height = core::cmp::max(nodes[0].best_block_info().1 + 1, nodes[1].best_block_info().1 + 1);
 275         let chan = create_announced_chan_between_nodes(&nodes, 0, 1, channelmanager::provided_init_features(), channelmanager::provided_init_features());
 276
 277         let channel_state = nodes[0].node.channel_state.lock().unwrap();
 278         assert_eq!(channel_state.by_id.len(), 1);
 279         assert_eq!(nodes[0].node.short_to_chan_info.read().unwrap().len(), 2);
 280         mem::drop(channel_state);
 281
 282         if !reorg_after_reload {
 283                 if use_funding_unconfirmed {
 284                         let relevant_txids = nodes[0].node.get_relevant_txids();
 285                         assert_eq!(relevant_txids.len(), 1);
 286                         let block_hash_opt = relevant_txids[0].1;
 287                         let expected_hash = nodes[0].get_block_header(chan_conf_height).block_hash();
 288                         assert_eq!(block_hash_opt, Some(expected_hash));
 289                         let txid = relevant_txids[0].0;
 290                         assert_eq!(txid, chan.3.txid());
 291                         nodes[0].node.transaction_unconfirmed(&txid);
 292                 } else if connect_style == ConnectStyle::FullBlockViaListen {
 293                         disconnect_blocks(&nodes[0], CHAN_CONFIRM_DEPTH - 1);
 294                         assert_eq!(nodes[0].node.list_usable_channels().len(), 1);
 295                         disconnect_blocks(&nodes[0], 1);
 296                 } else {
 297                         disconnect_all_blocks(&nodes[0]);
 298                 }
 299
 300                 let relevant_txids = nodes[0].node.get_relevant_txids();
 301                 assert_eq!(relevant_txids.len(), 0);
 302
 303                 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Channel closed because of an exception: Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs.");
 304                 check_added_monitors!(nodes[1], 1);
 305                 {
 306                         let channel_state = nodes[0].node.channel_state.lock().unwrap();
 307                         assert_eq!(channel_state.by_id.len(), 0);
 308                         assert_eq!(nodes[0].node.short_to_chan_info.read().unwrap().len(), 0);
 309                 }
 310         }
 311
 312         if reload_node {
 313                 // Since we currently have a background event pending, it's good to test that we survive a
 314                 // serialization roundtrip. Further, this tests the somewhat awkward edge-case of dropping
 315                 // the Channel object from the ChannelManager, but still having a monitor event pending for
 316                 // it when we go to deserialize, and then use the ChannelManager.
 317                 let nodes_0_serialized = nodes[0].node.encode();
 318                 let mut chan_0_monitor_serialized = test_utils::TestVecWriter(Vec::new());
 319                 get_monitor!(nodes[0], chan.2).write(&mut chan_0_monitor_serialized).unwrap();
 320
 321                 persister = test_utils::TestPersister::new();
 322                 let keys_manager = &chanmon_cfgs[0].keys_manager;
 323                 new_chain_monitor = test_utils::TestChainMonitor::new(Some(nodes[0].chain_source), nodes[0].tx_broadcaster.clone(), nodes[0].logger, node_cfgs[0].fee_estimator, &persister, keys_manager);
 324                 nodes[0].chain_monitor = &new_chain_monitor;
 325                 let mut chan_0_monitor_read = &chan_0_monitor_serialized.0[..];
 326                 let (_, mut chan_0_monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(
 327                         &mut chan_0_monitor_read, keys_manager).unwrap();
 328                 assert!(chan_0_monitor_read.is_empty());
 329
 330                 let mut nodes_0_read = &nodes_0_serialized[..];
 331                 nodes_0_deserialized = {
 332                         let mut channel_monitors = HashMap::new();
 333                         channel_monitors.insert(chan_0_monitor.get_funding_txo().0, &mut chan_0_monitor);
 334                         <(BlockHash, ChannelManager<&test_utils::TestChainMonitor, &test_utils::TestBroadcaster,
 335                           &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>)>::read(
 336                                 &mut nodes_0_read, ChannelManagerReadArgs {
 337                                         default_config: *nodes[0].node.get_current_default_configuration(),
 338                                         keys_manager,
 339                                         fee_estimator: node_cfgs[0].fee_estimator,
 340                                         chain_monitor: nodes[0].chain_monitor,
 341                                         tx_broadcaster: nodes[0].tx_broadcaster.clone(),
 342                                         logger: nodes[0].logger,
 343                                         channel_monitors,
 344                         }).unwrap().1
 345                 };
 346                 nodes[0].node = &nodes_0_deserialized;
 347                 assert!(nodes_0_read.is_empty());
 348                 if !reorg_after_reload {
 349                         // If the channel is already closed when we reload the node, we'll broadcast a closing
 350                         // transaction via the ChannelMonitor which is missing a corresponding channel.
 351                         assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
 352                         nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
 353                 }
 354
 355                 assert_eq!(nodes[0].chain_monitor.watch_channel(chan_0_monitor.get_funding_txo().0.clone(), chan_0_monitor),
 356                         ChannelMonitorUpdateStatus::Completed);
 357                 check_added_monitors!(nodes[0], 1);
 358         }
 359
 360         if reorg_after_reload {
 361                 if use_funding_unconfirmed {
 362                         let relevant_txids = nodes[0].node.get_relevant_txids();
 363                         assert_eq!(relevant_txids.len(), 1);
 364                         let block_hash_opt = relevant_txids[0].1;
 365                         let expected_hash = nodes[0].get_block_header(chan_conf_height).block_hash();
 366                         assert_eq!(block_hash_opt, Some(expected_hash));
 367                         let txid = relevant_txids[0].0;
 368                         assert_eq!(txid, chan.3.txid());
 369                         nodes[0].node.transaction_unconfirmed(&txid);
 370                 } else if connect_style == ConnectStyle::FullBlockViaListen {
 371                         disconnect_blocks(&nodes[0], CHAN_CONFIRM_DEPTH - 1);
 372                         assert_eq!(nodes[0].node.list_channels().len(), 1);
 373                         disconnect_blocks(&nodes[0], 1);
 374                 } else {
 375                         disconnect_all_blocks(&nodes[0]);
 376                 }
 377
 378                 let relevant_txids = nodes[0].node.get_relevant_txids();
 379                 assert_eq!(relevant_txids.len(), 0);
 380
 381                 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Channel closed because of an exception: Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs.");
 382                 check_added_monitors!(nodes[1], 1);
 383                 {
 384                         let channel_state = nodes[0].node.channel_state.lock().unwrap();
 385                         assert_eq!(channel_state.by_id.len(), 0);
 386                         assert_eq!(nodes[0].node.short_to_chan_info.read().unwrap().len(), 0);
 387                 }
 388         }
 389         // With expect_channel_force_closed set the TestChainMonitor will enforce that the next update
 390         // is a ChannelForcClosed on the right channel with should_broadcast set.
 391         *nodes[0].chain_monitor.expect_channel_force_closed.lock().unwrap() = Some((chan.2, true));
 392         nodes[0].node.test_process_background_events(); // Required to free the pending background monitor update
 393         check_added_monitors!(nodes[0], 1);
 394         let expected_err = "Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs.";
 395         check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyForceClosed { peer_msg: "Channel closed because of an exception: ".to_owned() + expected_err });
 396         check_closed_event!(nodes[0], 1, ClosureReason::ProcessingError { err: expected_err.to_owned() });
 397         assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
 398         nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
 399
 400         // Now check that we can create a new channel
 401         create_announced_chan_between_nodes(&nodes, 0, 1, channelmanager::provided_init_features(), channelmanager::provided_init_features());
 402         send_payment(&nodes[0], &[&nodes[1]], 8000000);
 403 }
 404
 405 #[test]
 406 fn test_unconf_chan() {
 407         do_test_unconf_chan(true, true, false, ConnectStyle::BestBlockFirstSkippingBlocks);
 408         do_test_unconf_chan(false, true, false, ConnectStyle::BestBlockFirstSkippingBlocks);
 409         do_test_unconf_chan(true, false, false, ConnectStyle::BestBlockFirstSkippingBlocks);
 410         do_test_unconf_chan(false, false, false, ConnectStyle::BestBlockFirstSkippingBlocks);
 411
 412         do_test_unconf_chan(true, true, false, ConnectStyle::BestBlockFirstReorgsOnlyTip);
 413         do_test_unconf_chan(false, true, false, ConnectStyle::BestBlockFirstReorgsOnlyTip);
 414         do_test_unconf_chan(true, false, false, ConnectStyle::BestBlockFirstReorgsOnlyTip);
 415         do_test_unconf_chan(false, false, false, ConnectStyle::BestBlockFirstReorgsOnlyTip);
 416 }
 417
 418 #[test]
 419 fn test_unconf_chan_via_listen() {
 420         do_test_unconf_chan(true, true, false, ConnectStyle::FullBlockViaListen);
 421         do_test_unconf_chan(false, true, false, ConnectStyle::FullBlockViaListen);
 422         do_test_unconf_chan(true, false, false, ConnectStyle::FullBlockViaListen);
 423         do_test_unconf_chan(false, false, false, ConnectStyle::FullBlockViaListen);
 424 }
 425
 426 #[test]
 427 fn test_unconf_chan_via_funding_unconfirmed() {
 428         do_test_unconf_chan(true, true, true, ConnectStyle::BestBlockFirstSkippingBlocks);
 429         do_test_unconf_chan(false, true, true, ConnectStyle::BestBlockFirstSkippingBlocks);
 430         do_test_unconf_chan(true, false, true, ConnectStyle::BestBlockFirstSkippingBlocks);
 431         do_test_unconf_chan(false, false, true, ConnectStyle::BestBlockFirstSkippingBlocks);
 432
 433         do_test_unconf_chan(true, true, true, ConnectStyle::BestBlockFirstReorgsOnlyTip);
 434         do_test_unconf_chan(false, true, true, ConnectStyle::BestBlockFirstReorgsOnlyTip);
 435         do_test_unconf_chan(true, false, true, ConnectStyle::BestBlockFirstReorgsOnlyTip);
 436         do_test_unconf_chan(false, false, true, ConnectStyle::BestBlockFirstReorgsOnlyTip);
 437
 438         do_test_unconf_chan(true, true, true, ConnectStyle::FullBlockViaListen);
 439         do_test_unconf_chan(false, true, true, ConnectStyle::FullBlockViaListen);
 440         do_test_unconf_chan(true, false, true, ConnectStyle::FullBlockViaListen);
 441         do_test_unconf_chan(false, false, true, ConnectStyle::FullBlockViaListen);
 442 }
 443
 444 #[test]
 445 fn test_set_outpoints_partial_claiming() {
 446         // - remote party claim tx, new bump tx
 447         // - disconnect remote claiming tx, new bump
 448         // - disconnect tx, see no tx anymore
 449         let chanmon_cfgs = create_chanmon_cfgs(2);
 450         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 451         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 452         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 453
 454         let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1000000, 59000000, channelmanager::provided_init_features(), channelmanager::provided_init_features());
 455         let (payment_preimage_1, payment_hash_1, _) = route_payment(&nodes[1], &[&nodes[0]], 3_000_000);
 456         let (payment_preimage_2, payment_hash_2, _) = route_payment(&nodes[1], &[&nodes[0]], 3_000_000);
 457
 458         // Remote commitment txn with 4 outputs: to_local, to_remote, 2 outgoing HTLC
 459         let remote_txn = get_local_commitment_txn!(nodes[1], chan.2);
 460         assert_eq!(remote_txn.len(), 3);
 461         assert_eq!(remote_txn[0].output.len(), 4);
 462         assert_eq!(remote_txn[0].input.len(), 1);
 463         assert_eq!(remote_txn[0].input[0].previous_output.txid, chan.3.txid());
 464         check_spends!(remote_txn[1], remote_txn[0]);
 465         check_spends!(remote_txn[2], remote_txn[0]);
 466
 467         // Connect blocks on node A to advance height towards TEST_FINAL_CLTV
 468         // Provide node A with both preimage
 469         nodes[0].node.claim_funds(payment_preimage_1);
 470         expect_payment_claimed!(nodes[0], payment_hash_1, 3_000_000);
 471         nodes[0].node.claim_funds(payment_preimage_2);
 472         expect_payment_claimed!(nodes[0], payment_hash_2, 3_000_000);
 473         check_added_monitors!(nodes[0], 2);
 474         nodes[0].node.get_and_clear_pending_msg_events();
 475
 476         // Connect blocks on node A commitment transaction
 477         mine_transaction(&nodes[0], &remote_txn[0]);
 478         check_closed_broadcast!(nodes[0], true);
 479         check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed);
 480         check_added_monitors!(nodes[0], 1);
 481         // Verify node A broadcast tx claiming both HTLCs
 482         {
 483                 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
 484                 // ChannelMonitor: claim tx, ChannelManager: local commitment tx + HTLC-Success*2
 485                 assert_eq!(node_txn.len(), 4);
 486                 check_spends!(node_txn[0], remote_txn[0]);
 487                 check_spends!(node_txn[1], chan.3);
 488                 check_spends!(node_txn[2], node_txn[1]);
 489                 check_spends!(node_txn[3], node_txn[1]);
 490                 assert_eq!(node_txn[0].input.len(), 2);
 491                 node_txn.clear();
 492         }
 493
 494         // Connect blocks on node B
 495         connect_blocks(&nodes[1], 135);
 496         check_closed_broadcast!(nodes[1], true);
 497         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
 498         check_added_monitors!(nodes[1], 1);
 499         // Verify node B broadcast 2 HTLC-timeout txn
 500         let partial_claim_tx = {
 501                 let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
 502                 assert_eq!(node_txn.len(), 3);
 503                 check_spends!(node_txn[1], node_txn[0]);
 504                 check_spends!(node_txn[2], node_txn[0]);
 505                 assert_eq!(node_txn[1].input.len(), 1);
 506                 assert_eq!(node_txn[2].input.len(), 1);
 507                 node_txn[1].clone()
 508         };
 509
 510         // Broadcast partial claim on node A, should regenerate a claiming tx with HTLC dropped
 511         mine_transaction(&nodes[0], &partial_claim_tx);
 512         {
 513                 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
 514                 assert_eq!(node_txn.len(), 1);
 515                 check_spends!(node_txn[0], remote_txn[0]);
 516                 assert_eq!(node_txn[0].input.len(), 1); //dropped HTLC
 517                 node_txn.clear();
 518         }
 519         nodes[0].node.get_and_clear_pending_msg_events();
 520
 521         // Disconnect last block on node A, should regenerate a claiming tx with HTLC dropped
 522         disconnect_blocks(&nodes[0], 1);
 523         {
 524                 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
 525                 assert_eq!(node_txn.len(), 1);
 526                 check_spends!(node_txn[0], remote_txn[0]);
 527                 assert_eq!(node_txn[0].input.len(), 2); //resurrected HTLC
 528                 node_txn.clear();
 529         }
 530
 531         //// Disconnect one more block and then reconnect multiple no transaction should be generated
 532         disconnect_blocks(&nodes[0], 1);
 533         connect_blocks(&nodes[0], 15);
 534         {
 535                 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
 536                 assert_eq!(node_txn.len(), 0);
 537                 node_txn.clear();
 538         }
 539 }
 540
 541 fn do_test_to_remote_after_local_detection(style: ConnectStyle) {
 542         // In previous code, detection of to_remote outputs in a counterparty commitment transaction
 543         // was dependent on whether a local commitment transaction had been seen on-chain previously.
 544         // This resulted in some edge cases around not being able to generate a SpendableOutput event
 545         // after a reorg.
 546         //
 547         // Here, we test this by first confirming one set of commitment transactions, then
 548         // disconnecting them and reconnecting another. We then confirm them and check that the correct
 549         // SpendableOutput event is generated.
 550         let chanmon_cfgs = create_chanmon_cfgs(2);
 551         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 552         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 553         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 554
 555         *nodes[0].connect_style.borrow_mut() = style;
 556         *nodes[1].connect_style.borrow_mut() = style;
 557
 558         let (_, _, chan_id, funding_tx) =
 559                 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 100_000_000, channelmanager::provided_init_features(), channelmanager::provided_init_features());
 560         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
 561         assert_eq!(funding_outpoint.to_channel_id(), chan_id);
 562
 563         let remote_txn_a = get_local_commitment_txn!(nodes[0], chan_id);
 564         let remote_txn_b = get_local_commitment_txn!(nodes[1], chan_id);
 565
 566         mine_transaction(&nodes[0], &remote_txn_a[0]);
 567         mine_transaction(&nodes[1], &remote_txn_a[0]);
 568
 569         assert!(nodes[0].node.list_channels().is_empty());
 570         check_closed_broadcast!(nodes[0], true);
 571         check_added_monitors!(nodes[0], 1);
 572         check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed);
 573         assert!(nodes[1].node.list_channels().is_empty());
 574         check_closed_broadcast!(nodes[1], true);
 575         check_added_monitors!(nodes[1], 1);
 576         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
 577
 578         // Drop transactions broadcasted in response to the first commitment transaction (we have good
 579         // test coverage of these things already elsewhere).
 580         assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0).len(), 1);
 581         assert_eq!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0).len(), 1);
 582
 583         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 584         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 585
 586         disconnect_blocks(&nodes[0], 1);
 587         disconnect_blocks(&nodes[1], 1);
 588
 589         assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
 590         assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
 591         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 592         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 593
 594         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
 595         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 596
 597         assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
 598         assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
 599         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 600         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 601
 602         mine_transaction(&nodes[0], &remote_txn_b[0]);
 603         mine_transaction(&nodes[1], &remote_txn_b[0]);
 604
 605         assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
 606         assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
 607         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 608         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 609
 610         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
 611         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 612
 613         let mut node_a_spendable = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
 614         assert_eq!(node_a_spendable.len(), 1);
 615         if let Event::SpendableOutputs { outputs } = node_a_spendable.pop().unwrap() {
 616                 assert_eq!(outputs.len(), 1);
 617                 let spend_tx = nodes[0].keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(),
 618                         Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, &Secp256k1::new()).unwrap();
 619                 check_spends!(spend_tx, remote_txn_b[0]);
 620         }
 621
 622         // nodes[1] is waiting for the to_self_delay to expire, which is many more than
 623         // ANTI_REORG_DELAY. Instead, walk it back and confirm the original remote_txn_a commitment
 624         // again and check that nodes[1] generates a similar spendable output.
 625         // Technically a reorg of ANTI_REORG_DELAY violates our assumptions, so this is undefined by
 626         // our API spec, but we currently handle this correctly and there's little reason we shouldn't
 627         // in the future.
 628         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 629         disconnect_blocks(&nodes[1], ANTI_REORG_DELAY);
 630         mine_transaction(&nodes[1], &remote_txn_a[0]);
 631         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 632
 633         let mut node_b_spendable = nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events();
 634         assert_eq!(node_b_spendable.len(), 1);
 635         if let Event::SpendableOutputs { outputs } = node_b_spendable.pop().unwrap() {
 636                 assert_eq!(outputs.len(), 1);
 637                 let spend_tx = nodes[1].keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(),
 638                         Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, &Secp256k1::new()).unwrap();
 639                 check_spends!(spend_tx, remote_txn_a[0]);
 640         }
 641 }
 642
 643 #[test]
 644 fn test_to_remote_after_local_detection() {
 645         do_test_to_remote_after_local_detection(ConnectStyle::BestBlockFirst);
 646         do_test_to_remote_after_local_detection(ConnectStyle::BestBlockFirstSkippingBlocks);
 647         do_test_to_remote_after_local_detection(ConnectStyle::BestBlockFirstReorgsOnlyTip);
 648         do_test_to_remote_after_local_detection(ConnectStyle::TransactionsFirst);
 649         do_test_to_remote_after_local_detection(ConnectStyle::TransactionsFirstSkippingBlocks);
 650         do_test_to_remote_after_local_detection(ConnectStyle::TransactionsFirstReorgsOnlyTip);
 651         do_test_to_remote_after_local_detection(ConnectStyle::FullBlockViaListen);
 652 }