1 // This file is Copyright its original authors, visible in version control
4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
7 // You may not use this file except in accordance with one or both of these
10 //! Further functional tests which test blockchain reorganizations.
12 use chain::channelmonitor::{ANTI_REORG_DELAY, ChannelMonitor};
13 use chain::transaction::OutPoint;
14 use chain::{Confirm, Watch};
16 use ln::channelmanager::{ChannelManager, ChannelManagerReadArgs};
17 use ln::features::InitFeatures;
18 use ln::msgs::{ChannelMessageHandler, ErrorAction};
19 use routing::network_graph::NetworkUpdate;
20 use util::enforcing_trait_impls::EnforcingSigner;
21 use util::events::{Event, MessageSendEvent, MessageSendEventsProvider, ClosureReason};
23 use util::ser::{ReadableArgs, Writeable};
25 use bitcoin::blockdata::block::{Block, BlockHeader};
26 use bitcoin::blockdata::script::Builder;
27 use bitcoin::blockdata::opcodes;
28 use bitcoin::hashes::sha256::Hash as Sha256;
29 use bitcoin::hashes::Hash;
30 use bitcoin::hash_types::BlockHash;
31 use bitcoin::secp256k1::Secp256k1;
36 use ln::functional_test_utils::*;
38 fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) {
39 // Our on-chain HTLC-claim learning has a few properties worth testing:
40 // * If an upstream HTLC is claimed with a preimage (both against our own commitment
41 // transaction our counterparty's), we claim it backwards immediately.
42 // * If an upstream HTLC is claimed with a timeout, we delay ANTI_REORG_DELAY before failing
43 // it backwards to ensure our counterparty can't claim with a preimage in a reorg.
45 // Here we test both properties in any combination based on the two bools passed in as
48 // If local_commitment is set, we first broadcast a local commitment containing an offered HTLC
49 // and an HTLC-Timeout tx, otherwise we broadcast a remote commitment containing a received
50 // HTLC and a local HTLC-Timeout tx spending it.
52 // We then either allow these transactions to confirm (if !claim) or we wait until one block
53 // before they otherwise would and reorg them out, confirming an HTLC-Success tx instead.
54 let chanmon_cfgs = create_chanmon_cfgs(3);
55 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
56 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
57 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
59 create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
60 let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
62 // Make sure all nodes are at the same starting height
63 connect_blocks(&nodes[0], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[0].best_block_info().1);
64 connect_blocks(&nodes[1], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[1].best_block_info().1);
65 connect_blocks(&nodes[2], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[2].best_block_info().1);
67 let (our_payment_preimage, our_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1000000);
69 // Provide preimage to node 2 by claiming payment
70 nodes[2].node.claim_funds(our_payment_preimage);
71 check_added_monitors!(nodes[2], 1);
72 get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
74 let mut header = BlockHeader { version: 0x2000_0000, prev_blockhash: nodes[2].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
75 let claim_txn = if local_commitment {
76 // Broadcast node 1 commitment txn to broadcast the HTLC-Timeout
77 let node_1_commitment_txn = get_local_commitment_txn!(nodes[1], chan_2.2);
78 assert_eq!(node_1_commitment_txn.len(), 2); // 1 local commitment tx, 1 Outbound HTLC-Timeout
79 assert_eq!(node_1_commitment_txn[0].output.len(), 2); // to-self and Offered HTLC (to-remote/to-node-3 is dust)
80 check_spends!(node_1_commitment_txn[0], chan_2.3);
81 check_spends!(node_1_commitment_txn[1], node_1_commitment_txn[0]);
83 // Give node 2 node 1's transactions and get its response (claiming the HTLC instead).
84 connect_block(&nodes[2], &Block { header, txdata: node_1_commitment_txn.clone() });
85 check_added_monitors!(nodes[2], 1);
86 check_closed_broadcast!(nodes[2], true); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate)
87 check_closed_event!(nodes[2], 1, ClosureReason::CommitmentTxConfirmed);
88 let node_2_commitment_txn = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap();
89 assert_eq!(node_2_commitment_txn.len(), 3); // ChannelMonitor: 1 offered HTLC-Claim, ChannelManger: 1 local commitment tx, 1 Received HTLC-Claim
90 assert_eq!(node_2_commitment_txn[1].output.len(), 2); // to-remote and Received HTLC (to-self is dust)
91 check_spends!(node_2_commitment_txn[1], chan_2.3);
92 check_spends!(node_2_commitment_txn[2], node_2_commitment_txn[1]);
93 check_spends!(node_2_commitment_txn[0], node_1_commitment_txn[0]);
95 // Make sure node 1's height is the same as the !local_commitment case
96 connect_blocks(&nodes[1], 1);
97 // Confirm node 1's commitment txn (and HTLC-Timeout) on node 1
98 header.prev_blockhash = nodes[1].best_block_hash();
99 connect_block(&nodes[1], &Block { header, txdata: node_1_commitment_txn.clone() });
101 // ...but return node 1's commitment tx in case claim is set and we're preparing to reorg
102 vec![node_1_commitment_txn[0].clone(), node_2_commitment_txn[0].clone()]
104 // Broadcast node 2 commitment txn
105 let node_2_commitment_txn = get_local_commitment_txn!(nodes[2], chan_2.2);
106 assert_eq!(node_2_commitment_txn.len(), 2); // 1 local commitment tx, 1 Received HTLC-Claim
107 assert_eq!(node_2_commitment_txn[0].output.len(), 2); // to-remote and Received HTLC (to-self is dust)
108 check_spends!(node_2_commitment_txn[0], chan_2.3);
109 check_spends!(node_2_commitment_txn[1], node_2_commitment_txn[0]);
111 // Give node 1 node 2's commitment transaction and get its response (timing the HTLC out)
112 mine_transaction(&nodes[1], &node_2_commitment_txn[0]);
113 connect_blocks(&nodes[1], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
114 let node_1_commitment_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clone();
115 assert_eq!(node_1_commitment_txn.len(), 2); // ChannelMonitor: 1 offered HTLC-Timeout, ChannelManger: 1 local commitment tx
116 assert_eq!(node_1_commitment_txn[0].output.len(), 2); // to-local and Offered HTLC (to-remote is dust)
117 check_spends!(node_1_commitment_txn[0], chan_2.3);
118 check_spends!(node_1_commitment_txn[1], node_2_commitment_txn[0]);
120 // Confirm node 2's commitment txn (and node 1's HTLC-Timeout) on node 1
121 header.prev_blockhash = nodes[1].best_block_hash();
122 let block = Block { header, txdata: vec![node_2_commitment_txn[0].clone(), node_1_commitment_txn[1].clone()] };
123 connect_block(&nodes[1], &block);
124 // ...but return node 2's commitment tx (and claim) in case claim is set and we're preparing to reorg
125 node_2_commitment_txn
127 check_added_monitors!(nodes[1], 1);
128 check_closed_broadcast!(nodes[1], true); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate)
129 check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
130 // Connect ANTI_REORG_DELAY - 2 blocks, giving us a confirmation count of ANTI_REORG_DELAY - 1.
131 connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
132 check_added_monitors!(nodes[1], 0);
133 assert_eq!(nodes[1].node.get_and_clear_pending_events().len(), 0);
136 disconnect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
139 header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 },
142 connect_block(&nodes[1], &block);
144 // ChannelManager only polls chain::Watch::release_pending_monitor_events when we
145 // probe it for events, so we probe non-message events here (which should just be the
146 // PaymentForwarded event).
147 expect_payment_forwarded!(nodes[1], Some(1000), true);
149 // Confirm the timeout tx and check that we fail the HTLC backwards
151 header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 },
154 connect_block(&nodes[1], &block);
155 expect_pending_htlcs_forwardable!(nodes[1]);
158 check_added_monitors!(nodes[1], 1);
159 // Which should result in an immediate claim/fail of the HTLC:
160 let htlc_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
162 assert_eq!(htlc_updates.update_fulfill_htlcs.len(), 1);
163 nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &htlc_updates.update_fulfill_htlcs[0]);
165 assert_eq!(htlc_updates.update_fail_htlcs.len(), 1);
166 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_updates.update_fail_htlcs[0]);
168 commitment_signed_dance!(nodes[0], nodes[1], htlc_updates.commitment_signed, false, true);
170 expect_payment_sent!(nodes[0], our_payment_preimage);
172 expect_payment_failed_with_update!(nodes[0], our_payment_hash, false, chan_2.0.contents.short_channel_id, true);
177 fn test_onchain_htlc_claim_reorg_local_commitment() {
178 do_test_onchain_htlc_reorg(true, true);
181 fn test_onchain_htlc_timeout_delay_local_commitment() {
182 do_test_onchain_htlc_reorg(true, false);
185 fn test_onchain_htlc_claim_reorg_remote_commitment() {
186 do_test_onchain_htlc_reorg(false, true);
189 fn test_onchain_htlc_timeout_delay_remote_commitment() {
190 do_test_onchain_htlc_reorg(false, false);
193 fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_unconfirmed: bool, connect_style: ConnectStyle) {
194 // After creating a chan between nodes, we disconnect all blocks previously seen to force a
195 // channel close on nodes[0] side. We also use this to provide very basic testing of logic
196 // around freeing background events which store monitor updates during block_[dis]connected.
197 let chanmon_cfgs = create_chanmon_cfgs(2);
198 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
199 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
200 let persister: test_utils::TestPersister;
201 let new_chain_monitor: test_utils::TestChainMonitor;
202 let nodes_0_deserialized: ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>;
203 let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
204 *nodes[0].connect_style.borrow_mut() = connect_style;
206 let chan = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
208 let channel_state = nodes[0].node.channel_state.lock().unwrap();
209 assert_eq!(channel_state.by_id.len(), 1);
210 assert_eq!(channel_state.short_to_id.len(), 1);
211 mem::drop(channel_state);
213 if !reorg_after_reload {
214 if use_funding_unconfirmed {
215 let relevant_txids = nodes[0].node.get_relevant_txids();
216 assert_eq!(&relevant_txids[..], &[chan.3.txid()]);
217 nodes[0].node.transaction_unconfirmed(&relevant_txids[0]);
219 disconnect_all_blocks(&nodes[0]);
221 if connect_style == ConnectStyle::FullBlockViaListen && !use_funding_unconfirmed {
222 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 2 confs.");
224 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs.");
226 check_added_monitors!(nodes[1], 1);
228 let channel_state = nodes[0].node.channel_state.lock().unwrap();
229 assert_eq!(channel_state.by_id.len(), 0);
230 assert_eq!(channel_state.short_to_id.len(), 0);
235 // Since we currently have a background event pending, it's good to test that we survive a
236 // serialization roundtrip. Further, this tests the somewhat awkward edge-case of dropping
237 // the Channel object from the ChannelManager, but still having a monitor event pending for
238 // it when we go to deserialize, and then use the ChannelManager.
239 let nodes_0_serialized = nodes[0].node.encode();
240 let mut chan_0_monitor_serialized = test_utils::TestVecWriter(Vec::new());
241 nodes[0].chain_monitor.chain_monitor.monitors.read().unwrap().iter().next().unwrap().1.write(&mut chan_0_monitor_serialized).unwrap();
243 persister = test_utils::TestPersister::new();
244 let keys_manager = &chanmon_cfgs[0].keys_manager;
245 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);
246 nodes[0].chain_monitor = &new_chain_monitor;
247 let mut chan_0_monitor_read = &chan_0_monitor_serialized.0[..];
248 let (_, mut chan_0_monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(
249 &mut chan_0_monitor_read, keys_manager).unwrap();
250 assert!(chan_0_monitor_read.is_empty());
252 let mut nodes_0_read = &nodes_0_serialized[..];
253 nodes_0_deserialized = {
254 let mut channel_monitors = HashMap::new();
255 channel_monitors.insert(chan_0_monitor.get_funding_txo().0, &mut chan_0_monitor);
256 <(BlockHash, ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster,
257 &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>)>::read(
258 &mut nodes_0_read, ChannelManagerReadArgs {
259 default_config: *nodes[0].node.get_current_default_configuration(),
261 fee_estimator: node_cfgs[0].fee_estimator,
262 chain_monitor: nodes[0].chain_monitor,
263 tx_broadcaster: nodes[0].tx_broadcaster.clone(),
264 logger: nodes[0].logger,
268 nodes[0].node = &nodes_0_deserialized;
269 assert!(nodes_0_read.is_empty());
270 if !reorg_after_reload {
271 // If the channel is already closed when we reload the node, we'll broadcast a closing
272 // transaction via the ChannelMonitor which is missing a corresponding channel.
273 assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
274 nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
277 nodes[0].chain_monitor.watch_channel(chan_0_monitor.get_funding_txo().0.clone(), chan_0_monitor).unwrap();
278 check_added_monitors!(nodes[0], 1);
281 if reorg_after_reload {
282 if use_funding_unconfirmed {
283 let relevant_txids = nodes[0].node.get_relevant_txids();
284 assert_eq!(&relevant_txids[..], &[chan.3.txid()]);
285 nodes[0].node.transaction_unconfirmed(&relevant_txids[0]);
287 disconnect_all_blocks(&nodes[0]);
289 if connect_style == ConnectStyle::FullBlockViaListen && !use_funding_unconfirmed {
290 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 2 confs.");
292 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs.");
294 check_added_monitors!(nodes[1], 1);
296 let channel_state = nodes[0].node.channel_state.lock().unwrap();
297 assert_eq!(channel_state.by_id.len(), 0);
298 assert_eq!(channel_state.short_to_id.len(), 0);
301 // With expect_channel_force_closed set the TestChainMonitor will enforce that the next update
302 // is a ChannelForcClosed on the right channel with should_broadcast set.
303 *nodes[0].chain_monitor.expect_channel_force_closed.lock().unwrap() = Some((chan.2, true));
304 nodes[0].node.test_process_background_events(); // Required to free the pending background monitor update
305 check_added_monitors!(nodes[0], 1);
306 check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed);
307 if connect_style == ConnectStyle::FullBlockViaListen && !use_funding_unconfirmed {
308 check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyForceClosed { peer_msg: "Funding transaction was un-confirmed. Locked at 6 confs, now have 2 confs.".to_string() });
310 check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyForceClosed { peer_msg: "Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs.".to_string() });
312 assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
313 nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
315 // Now check that we can create a new channel
316 create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
317 send_payment(&nodes[0], &[&nodes[1]], 8000000);
321 fn test_unconf_chan() {
322 do_test_unconf_chan(true, true, false, ConnectStyle::BestBlockFirstSkippingBlocks);
323 do_test_unconf_chan(false, true, false, ConnectStyle::BestBlockFirstSkippingBlocks);
324 do_test_unconf_chan(true, false, false, ConnectStyle::BestBlockFirstSkippingBlocks);
325 do_test_unconf_chan(false, false, false, ConnectStyle::BestBlockFirstSkippingBlocks);
329 fn test_unconf_chan_via_listen() {
330 do_test_unconf_chan(true, true, false, ConnectStyle::FullBlockViaListen);
331 do_test_unconf_chan(false, true, false, ConnectStyle::FullBlockViaListen);
332 do_test_unconf_chan(true, false, false, ConnectStyle::FullBlockViaListen);
333 do_test_unconf_chan(false, false, false, ConnectStyle::FullBlockViaListen);
337 fn test_unconf_chan_via_funding_unconfirmed() {
338 do_test_unconf_chan(true, true, true, ConnectStyle::BestBlockFirstSkippingBlocks);
339 do_test_unconf_chan(false, true, true, ConnectStyle::BestBlockFirstSkippingBlocks);
340 do_test_unconf_chan(true, false, true, ConnectStyle::BestBlockFirstSkippingBlocks);
341 do_test_unconf_chan(false, false, true, ConnectStyle::BestBlockFirstSkippingBlocks);
343 do_test_unconf_chan(true, true, true, ConnectStyle::FullBlockViaListen);
344 do_test_unconf_chan(false, true, true, ConnectStyle::FullBlockViaListen);
345 do_test_unconf_chan(true, false, true, ConnectStyle::FullBlockViaListen);
346 do_test_unconf_chan(false, false, true, ConnectStyle::FullBlockViaListen);
350 fn test_set_outpoints_partial_claiming() {
351 // - remote party claim tx, new bump tx
352 // - disconnect remote claiming tx, new bump
353 // - disconnect tx, see no tx anymore
354 let chanmon_cfgs = create_chanmon_cfgs(2);
355 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
356 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
357 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
359 let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1000000, 59000000, InitFeatures::known(), InitFeatures::known());
360 let payment_preimage_1 = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3_000_000).0;
361 let payment_preimage_2 = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3_000_000).0;
363 // Remote commitment txn with 4 outputs: to_local, to_remote, 2 outgoing HTLC
364 let remote_txn = get_local_commitment_txn!(nodes[1], chan.2);
365 assert_eq!(remote_txn.len(), 3);
366 assert_eq!(remote_txn[0].output.len(), 4);
367 assert_eq!(remote_txn[0].input.len(), 1);
368 assert_eq!(remote_txn[0].input[0].previous_output.txid, chan.3.txid());
369 check_spends!(remote_txn[1], remote_txn[0]);
370 check_spends!(remote_txn[2], remote_txn[0]);
372 // Connect blocks on node A to advance height towards TEST_FINAL_CLTV
373 // Provide node A with both preimage
374 nodes[0].node.claim_funds(payment_preimage_1);
375 nodes[0].node.claim_funds(payment_preimage_2);
376 check_added_monitors!(nodes[0], 2);
377 nodes[0].node.get_and_clear_pending_events();
378 nodes[0].node.get_and_clear_pending_msg_events();
380 // Connect blocks on node A commitment transaction
381 mine_transaction(&nodes[0], &remote_txn[0]);
382 check_closed_broadcast!(nodes[0], true);
383 check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed);
384 check_added_monitors!(nodes[0], 1);
385 // Verify node A broadcast tx claiming both HTLCs
387 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
388 // ChannelMonitor: claim tx, ChannelManager: local commitment tx + HTLC-Success*2
389 assert_eq!(node_txn.len(), 4);
390 check_spends!(node_txn[0], remote_txn[0]);
391 check_spends!(node_txn[1], chan.3);
392 check_spends!(node_txn[2], node_txn[1]);
393 check_spends!(node_txn[3], node_txn[1]);
394 assert_eq!(node_txn[0].input.len(), 2);
398 // Connect blocks on node B
399 connect_blocks(&nodes[1], 135);
400 check_closed_broadcast!(nodes[1], true);
401 check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
402 check_added_monitors!(nodes[1], 1);
403 // Verify node B broadcast 2 HTLC-timeout txn
404 let partial_claim_tx = {
405 let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
406 assert_eq!(node_txn.len(), 3);
407 check_spends!(node_txn[1], node_txn[0]);
408 check_spends!(node_txn[2], node_txn[0]);
409 assert_eq!(node_txn[1].input.len(), 1);
410 assert_eq!(node_txn[2].input.len(), 1);
414 // Broadcast partial claim on node A, should regenerate a claiming tx with HTLC dropped
415 mine_transaction(&nodes[0], &partial_claim_tx);
417 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
418 assert_eq!(node_txn.len(), 1);
419 check_spends!(node_txn[0], remote_txn[0]);
420 assert_eq!(node_txn[0].input.len(), 1); //dropped HTLC
423 nodes[0].node.get_and_clear_pending_msg_events();
425 // Disconnect last block on node A, should regenerate a claiming tx with HTLC dropped
426 disconnect_blocks(&nodes[0], 1);
428 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
429 assert_eq!(node_txn.len(), 1);
430 check_spends!(node_txn[0], remote_txn[0]);
431 assert_eq!(node_txn[0].input.len(), 2); //resurrected HTLC
435 //// Disconnect one more block and then reconnect multiple no transaction should be generated
436 disconnect_blocks(&nodes[0], 1);
437 connect_blocks(&nodes[0], 15);
439 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
440 assert_eq!(node_txn.len(), 0);
445 fn do_test_to_remote_after_local_detection(style: ConnectStyle) {
446 // In previous code, detection of to_remote outputs in a counterparty commitment transaction
447 // was dependent on whether a local commitment transaction had been seen on-chain previously.
448 // This resulted in some edge cases around not being able to generate a SpendableOutput event
451 // Here, we test this by first confirming one set of commitment transactions, then
452 // disconnecting them and reconnecting another. We then confirm them and check that the correct
453 // SpendableOutput event is generated.
454 let chanmon_cfgs = create_chanmon_cfgs(2);
455 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
456 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
457 let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
459 *nodes[0].connect_style.borrow_mut() = style;
460 *nodes[1].connect_style.borrow_mut() = style;
462 let (_, _, chan_id, funding_tx) =
463 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 100_000_000, InitFeatures::known(), InitFeatures::known());
464 let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
465 assert_eq!(funding_outpoint.to_channel_id(), chan_id);
467 let remote_txn_a = get_local_commitment_txn!(nodes[0], chan_id);
468 let remote_txn_b = get_local_commitment_txn!(nodes[1], chan_id);
470 mine_transaction(&nodes[0], &remote_txn_a[0]);
471 mine_transaction(&nodes[1], &remote_txn_a[0]);
473 assert!(nodes[0].node.list_channels().is_empty());
474 check_closed_broadcast!(nodes[0], true);
475 check_added_monitors!(nodes[0], 1);
476 check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed);
477 assert!(nodes[1].node.list_channels().is_empty());
478 check_closed_broadcast!(nodes[1], true);
479 check_added_monitors!(nodes[1], 1);
480 check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
482 // Drop transactions broadcasted in response to the first commitment transaction (we have good
483 // test coverage of these things already elsewhere).
484 assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0).len(), 1);
485 assert_eq!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0).len(), 1);
487 assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
488 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
490 disconnect_blocks(&nodes[0], 1);
491 disconnect_blocks(&nodes[1], 1);
493 assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
494 assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
495 assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
496 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
498 connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
499 connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
501 assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
502 assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
503 assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
504 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
506 mine_transaction(&nodes[0], &remote_txn_b[0]);
507 mine_transaction(&nodes[1], &remote_txn_b[0]);
509 assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
510 assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
511 assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
512 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
514 connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
515 connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
517 let mut node_a_spendable = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
518 assert_eq!(node_a_spendable.len(), 1);
519 if let Event::SpendableOutputs { outputs } = node_a_spendable.pop().unwrap() {
520 assert_eq!(outputs.len(), 1);
521 let spend_tx = nodes[0].keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(),
522 Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, &Secp256k1::new()).unwrap();
523 check_spends!(spend_tx, remote_txn_b[0]);
526 // nodes[1] is waiting for the to_self_delay to expire, which is many more than
527 // ANTI_REORG_DELAY. Instead, walk it back and confirm the original remote_txn_a commitment
528 // again and check that nodes[1] generates a similar spendable output.
529 // Technically a reorg of ANTI_REORG_DELAY violates our assumptions, so this is undefined by
530 // our API spec, but we currently handle this correctly and there's little reason we shouldn't
532 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
533 disconnect_blocks(&nodes[1], ANTI_REORG_DELAY);
534 mine_transaction(&nodes[1], &remote_txn_a[0]);
535 connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
537 let mut node_b_spendable = nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events();
538 assert_eq!(node_b_spendable.len(), 1);
539 if let Event::SpendableOutputs { outputs } = node_b_spendable.pop().unwrap() {
540 assert_eq!(outputs.len(), 1);
541 let spend_tx = nodes[1].keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(),
542 Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, &Secp256k1::new()).unwrap();
543 check_spends!(spend_tx, remote_txn_a[0]);
548 fn test_to_remote_after_local_detection() {
549 do_test_to_remote_after_local_detection(ConnectStyle::BestBlockFirst);
550 do_test_to_remote_after_local_detection(ConnectStyle::BestBlockFirstSkippingBlocks);
551 do_test_to_remote_after_local_detection(ConnectStyle::TransactionsFirst);
552 do_test_to_remote_after_local_detection(ConnectStyle::TransactionsFirstSkippingBlocks);
553 do_test_to_remote_after_local_detection(ConnectStyle::FullBlockViaListen);