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};
15 use ln::channelmanager::{ChannelManager, ChannelManagerReadArgs};
16 use ln::features::InitFeatures;
17 use ln::msgs::{ChannelMessageHandler, ErrorAction};
18 use routing::network_graph::NetworkUpdate;
19 use util::enforcing_trait_impls::EnforcingSigner;
20 use util::events::{Event, MessageSendEvent, MessageSendEventsProvider};
22 use util::ser::{ReadableArgs, Writeable};
24 use bitcoin::blockdata::block::{Block, BlockHeader};
25 use bitcoin::blockdata::script::Builder;
26 use bitcoin::blockdata::opcodes;
27 use bitcoin::hash_types::BlockHash;
28 use bitcoin::secp256k1::Secp256k1;
33 use ln::functional_test_utils::*;
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.
42 // Here we test both properties in any combination based on the two bools passed in as
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.
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);
56 create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
57 let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
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);
64 let (our_payment_preimage, our_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1000000);
66 // Provide preimage to node 2 by claiming payment
67 nodes[2].node.claim_funds(our_payment_preimage);
68 check_added_monitors!(nodes[2], 1);
69 get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
71 let mut header = BlockHeader { version: 0x2000_0000, prev_blockhash: nodes[2].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
72 let claim_txn = if local_commitment {
73 // Broadcast node 1 commitment txn to broadcast the HTLC-Timeout
74 let node_1_commitment_txn = get_local_commitment_txn!(nodes[1], chan_2.2);
75 assert_eq!(node_1_commitment_txn.len(), 2); // 1 local commitment tx, 1 Outbound HTLC-Timeout
76 assert_eq!(node_1_commitment_txn[0].output.len(), 2); // to-self and Offered HTLC (to-remote/to-node-3 is dust)
77 check_spends!(node_1_commitment_txn[0], chan_2.3);
78 check_spends!(node_1_commitment_txn[1], node_1_commitment_txn[0]);
80 // Give node 2 node 1's transactions and get its response (claiming the HTLC instead).
81 connect_block(&nodes[2], &Block { header, txdata: node_1_commitment_txn.clone() });
82 check_added_monitors!(nodes[2], 1);
83 check_closed_broadcast!(nodes[2], true); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate)
84 let node_2_commitment_txn = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap();
85 assert_eq!(node_2_commitment_txn.len(), 3); // ChannelMonitor: 1 offered HTLC-Claim, ChannelManger: 1 local commitment tx, 1 Received HTLC-Claim
86 assert_eq!(node_2_commitment_txn[1].output.len(), 2); // to-remote and Received HTLC (to-self is dust)
87 check_spends!(node_2_commitment_txn[1], chan_2.3);
88 check_spends!(node_2_commitment_txn[2], node_2_commitment_txn[1]);
89 check_spends!(node_2_commitment_txn[0], node_1_commitment_txn[0]);
91 // Make sure node 1's height is the same as the !local_commitment case
92 connect_blocks(&nodes[1], 1);
93 // Confirm node 1's commitment txn (and HTLC-Timeout) on node 1
94 header.prev_blockhash = nodes[1].best_block_hash();
95 connect_block(&nodes[1], &Block { header, txdata: node_1_commitment_txn.clone() });
97 // ...but return node 1's commitment tx in case claim is set and we're preparing to reorg
98 vec![node_1_commitment_txn[0].clone(), node_2_commitment_txn[0].clone()]
100 // Broadcast node 2 commitment txn
101 let node_2_commitment_txn = get_local_commitment_txn!(nodes[2], chan_2.2);
102 assert_eq!(node_2_commitment_txn.len(), 2); // 1 local commitment tx, 1 Received HTLC-Claim
103 assert_eq!(node_2_commitment_txn[0].output.len(), 2); // to-remote and Received HTLC (to-self is dust)
104 check_spends!(node_2_commitment_txn[0], chan_2.3);
105 check_spends!(node_2_commitment_txn[1], node_2_commitment_txn[0]);
107 // Give node 1 node 2's commitment transaction and get its response (timing the HTLC out)
108 mine_transaction(&nodes[1], &node_2_commitment_txn[0]);
109 connect_blocks(&nodes[1], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires
110 let node_1_commitment_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clone();
111 assert_eq!(node_1_commitment_txn.len(), 2); // ChannelMonitor: 1 offered HTLC-Timeout, ChannelManger: 1 local commitment tx
112 assert_eq!(node_1_commitment_txn[0].output.len(), 2); // to-local and Offered HTLC (to-remote is dust)
113 check_spends!(node_1_commitment_txn[0], chan_2.3);
114 check_spends!(node_1_commitment_txn[1], node_2_commitment_txn[0]);
116 // Confirm node 2's commitment txn (and node 1's HTLC-Timeout) on node 1
117 header.prev_blockhash = nodes[1].best_block_hash();
118 let block = Block { header, txdata: vec![node_2_commitment_txn[0].clone(), node_1_commitment_txn[1].clone()] };
119 connect_block(&nodes[1], &block);
120 // ...but return node 2's commitment tx (and claim) in case claim is set and we're preparing to reorg
121 node_2_commitment_txn
123 check_added_monitors!(nodes[1], 1);
124 check_closed_broadcast!(nodes[1], true); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate)
125 // Connect ANTI_REORG_DELAY - 2 blocks, giving us a confirmation count of ANTI_REORG_DELAY - 1.
126 connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
127 check_added_monitors!(nodes[1], 0);
128 assert_eq!(nodes[1].node.get_and_clear_pending_events().len(), 0);
131 disconnect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
134 header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 },
137 connect_block(&nodes[1], &block);
139 // ChannelManager only polls chain::Watch::release_pending_monitor_events when we
140 // probe it for events, so we probe non-message events here (which should just be the
141 // PaymentForwarded event).
142 expect_payment_forwarded!(nodes[1], Some(1000), true);
144 // Confirm the timeout tx and check that we fail the HTLC backwards
146 header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 },
149 connect_block(&nodes[1], &block);
150 expect_pending_htlcs_forwardable!(nodes[1]);
153 check_added_monitors!(nodes[1], 1);
154 // Which should result in an immediate claim/fail of the HTLC:
155 let htlc_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
157 assert_eq!(htlc_updates.update_fulfill_htlcs.len(), 1);
158 nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &htlc_updates.update_fulfill_htlcs[0]);
160 assert_eq!(htlc_updates.update_fail_htlcs.len(), 1);
161 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_updates.update_fail_htlcs[0]);
163 commitment_signed_dance!(nodes[0], nodes[1], htlc_updates.commitment_signed, false, true);
165 expect_payment_sent!(nodes[0], our_payment_preimage);
167 expect_payment_failed_with_update!(nodes[0], our_payment_hash, false, chan_2.0.contents.short_channel_id, true);
172 fn test_onchain_htlc_claim_reorg_local_commitment() {
173 do_test_onchain_htlc_reorg(true, true);
176 fn test_onchain_htlc_timeout_delay_local_commitment() {
177 do_test_onchain_htlc_reorg(true, false);
180 fn test_onchain_htlc_claim_reorg_remote_commitment() {
181 do_test_onchain_htlc_reorg(false, true);
184 fn test_onchain_htlc_timeout_delay_remote_commitment() {
185 do_test_onchain_htlc_reorg(false, false);
188 fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_unconfirmed: bool, connect_style: ConnectStyle) {
189 // After creating a chan between nodes, we disconnect all blocks previously seen to force a
190 // channel close on nodes[0] side. We also use this to provide very basic testing of logic
191 // around freeing background events which store monitor updates during block_[dis]connected.
192 let chanmon_cfgs = create_chanmon_cfgs(2);
193 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
194 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
195 let persister: test_utils::TestPersister;
196 let new_chain_monitor: test_utils::TestChainMonitor;
197 let nodes_0_deserialized: ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>;
198 let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
199 *nodes[0].connect_style.borrow_mut() = connect_style;
201 let chan = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
203 let channel_state = nodes[0].node.channel_state.lock().unwrap();
204 assert_eq!(channel_state.by_id.len(), 1);
205 assert_eq!(channel_state.short_to_id.len(), 1);
206 mem::drop(channel_state);
208 if !reorg_after_reload {
209 if use_funding_unconfirmed {
210 let relevant_txids = nodes[0].node.get_relevant_txids();
211 assert_eq!(&relevant_txids[..], &[chan.3.txid()]);
212 nodes[0].node.transaction_unconfirmed(&relevant_txids[0]);
214 disconnect_all_blocks(&nodes[0]);
216 if connect_style == ConnectStyle::FullBlockViaListen && !use_funding_unconfirmed {
217 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 2 confs.");
219 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs.");
221 check_added_monitors!(nodes[1], 1);
223 let channel_state = nodes[0].node.channel_state.lock().unwrap();
224 assert_eq!(channel_state.by_id.len(), 0);
225 assert_eq!(channel_state.short_to_id.len(), 0);
230 // Since we currently have a background event pending, it's good to test that we survive a
231 // serialization roundtrip. Further, this tests the somewhat awkward edge-case of dropping
232 // the Channel object from the ChannelManager, but still having a monitor event pending for
233 // it when we go to deserialize, and then use the ChannelManager.
234 let nodes_0_serialized = nodes[0].node.encode();
235 let mut chan_0_monitor_serialized = test_utils::TestVecWriter(Vec::new());
236 nodes[0].chain_monitor.chain_monitor.monitors.read().unwrap().iter().next().unwrap().1.write(&mut chan_0_monitor_serialized).unwrap();
238 persister = test_utils::TestPersister::new();
239 let keys_manager = &chanmon_cfgs[0].keys_manager;
240 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);
241 nodes[0].chain_monitor = &new_chain_monitor;
242 let mut chan_0_monitor_read = &chan_0_monitor_serialized.0[..];
243 let (_, mut chan_0_monitor) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(
244 &mut chan_0_monitor_read, keys_manager).unwrap();
245 assert!(chan_0_monitor_read.is_empty());
247 let mut nodes_0_read = &nodes_0_serialized[..];
248 nodes_0_deserialized = {
249 let mut channel_monitors = HashMap::new();
250 channel_monitors.insert(chan_0_monitor.get_funding_txo().0, &mut chan_0_monitor);
251 <(BlockHash, ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster,
252 &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>)>::read(
253 &mut nodes_0_read, ChannelManagerReadArgs {
254 default_config: *nodes[0].node.get_current_default_configuration(),
256 fee_estimator: node_cfgs[0].fee_estimator,
257 chain_monitor: nodes[0].chain_monitor,
258 tx_broadcaster: nodes[0].tx_broadcaster.clone(),
259 logger: nodes[0].logger,
263 nodes[0].node = &nodes_0_deserialized;
264 assert!(nodes_0_read.is_empty());
265 if !reorg_after_reload {
266 // If the channel is already closed when we reload the node, we'll broadcast a closing
267 // transaction via the ChannelMonitor which is missing a corresponding channel.
268 assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
269 nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
272 nodes[0].chain_monitor.watch_channel(chan_0_monitor.get_funding_txo().0.clone(), chan_0_monitor).unwrap();
273 check_added_monitors!(nodes[0], 1);
276 if reorg_after_reload {
277 if use_funding_unconfirmed {
278 let relevant_txids = nodes[0].node.get_relevant_txids();
279 assert_eq!(&relevant_txids[..], &[chan.3.txid()]);
280 nodes[0].node.transaction_unconfirmed(&relevant_txids[0]);
282 disconnect_all_blocks(&nodes[0]);
284 if connect_style == ConnectStyle::FullBlockViaListen && !use_funding_unconfirmed {
285 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 2 confs.");
287 handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs.");
289 check_added_monitors!(nodes[1], 1);
291 let channel_state = nodes[0].node.channel_state.lock().unwrap();
292 assert_eq!(channel_state.by_id.len(), 0);
293 assert_eq!(channel_state.short_to_id.len(), 0);
296 // With expect_channel_force_closed set the TestChainMonitor will enforce that the next update
297 // is a ChannelForcClosed on the right channel with should_broadcast set.
298 *nodes[0].chain_monitor.expect_channel_force_closed.lock().unwrap() = Some((chan.2, true));
299 nodes[0].node.test_process_background_events(); // Required to free the pending background monitor update
300 check_added_monitors!(nodes[0], 1);
301 assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1);
302 nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
304 // Now check that we can create a new channel
305 create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
306 send_payment(&nodes[0], &[&nodes[1]], 8000000);
310 fn test_unconf_chan() {
311 do_test_unconf_chan(true, true, false, ConnectStyle::BestBlockFirstSkippingBlocks);
312 do_test_unconf_chan(false, true, false, ConnectStyle::BestBlockFirstSkippingBlocks);
313 do_test_unconf_chan(true, false, false, ConnectStyle::BestBlockFirstSkippingBlocks);
314 do_test_unconf_chan(false, false, false, ConnectStyle::BestBlockFirstSkippingBlocks);
318 fn test_unconf_chan_via_listen() {
319 do_test_unconf_chan(true, true, false, ConnectStyle::FullBlockViaListen);
320 do_test_unconf_chan(false, true, false, ConnectStyle::FullBlockViaListen);
321 do_test_unconf_chan(true, false, false, ConnectStyle::FullBlockViaListen);
322 do_test_unconf_chan(false, false, false, ConnectStyle::FullBlockViaListen);
326 fn test_unconf_chan_via_funding_unconfirmed() {
327 do_test_unconf_chan(true, true, true, ConnectStyle::BestBlockFirstSkippingBlocks);
328 do_test_unconf_chan(false, true, true, ConnectStyle::BestBlockFirstSkippingBlocks);
329 do_test_unconf_chan(true, false, true, ConnectStyle::BestBlockFirstSkippingBlocks);
330 do_test_unconf_chan(false, false, true, ConnectStyle::BestBlockFirstSkippingBlocks);
332 do_test_unconf_chan(true, true, true, ConnectStyle::FullBlockViaListen);
333 do_test_unconf_chan(false, true, true, ConnectStyle::FullBlockViaListen);
334 do_test_unconf_chan(true, false, true, ConnectStyle::FullBlockViaListen);
335 do_test_unconf_chan(false, false, true, ConnectStyle::FullBlockViaListen);
339 fn test_set_outpoints_partial_claiming() {
340 // - remote party claim tx, new bump tx
341 // - disconnect remote claiming tx, new bump
342 // - disconnect tx, see no tx anymore
343 let chanmon_cfgs = create_chanmon_cfgs(2);
344 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
345 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
346 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
348 let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1000000, 59000000, InitFeatures::known(), InitFeatures::known());
349 let payment_preimage_1 = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3_000_000).0;
350 let payment_preimage_2 = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3_000_000).0;
352 // Remote commitment txn with 4 outputs: to_local, to_remote, 2 outgoing HTLC
353 let remote_txn = get_local_commitment_txn!(nodes[1], chan.2);
354 assert_eq!(remote_txn.len(), 3);
355 assert_eq!(remote_txn[0].output.len(), 4);
356 assert_eq!(remote_txn[0].input.len(), 1);
357 assert_eq!(remote_txn[0].input[0].previous_output.txid, chan.3.txid());
358 check_spends!(remote_txn[1], remote_txn[0]);
359 check_spends!(remote_txn[2], remote_txn[0]);
361 // Connect blocks on node A to advance height towards TEST_FINAL_CLTV
362 // Provide node A with both preimage
363 nodes[0].node.claim_funds(payment_preimage_1);
364 nodes[0].node.claim_funds(payment_preimage_2);
365 check_added_monitors!(nodes[0], 2);
366 nodes[0].node.get_and_clear_pending_events();
367 nodes[0].node.get_and_clear_pending_msg_events();
369 // Connect blocks on node A commitment transaction
370 mine_transaction(&nodes[0], &remote_txn[0]);
371 check_closed_broadcast!(nodes[0], true);
372 check_added_monitors!(nodes[0], 1);
373 // Verify node A broadcast tx claiming both HTLCs
375 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
376 // ChannelMonitor: claim tx, ChannelManager: local commitment tx + HTLC-Success*2
377 assert_eq!(node_txn.len(), 4);
378 check_spends!(node_txn[0], remote_txn[0]);
379 check_spends!(node_txn[1], chan.3);
380 check_spends!(node_txn[2], node_txn[1]);
381 check_spends!(node_txn[3], node_txn[1]);
382 assert_eq!(node_txn[0].input.len(), 2);
386 // Connect blocks on node B
387 connect_blocks(&nodes[1], 135);
388 check_closed_broadcast!(nodes[1], true);
389 check_added_monitors!(nodes[1], 1);
390 // Verify node B broadcast 2 HTLC-timeout txn
391 let partial_claim_tx = {
392 let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
393 assert_eq!(node_txn.len(), 3);
394 check_spends!(node_txn[1], node_txn[0]);
395 check_spends!(node_txn[2], node_txn[0]);
396 assert_eq!(node_txn[1].input.len(), 1);
397 assert_eq!(node_txn[2].input.len(), 1);
401 // Broadcast partial claim on node A, should regenerate a claiming tx with HTLC dropped
402 mine_transaction(&nodes[0], &partial_claim_tx);
404 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
405 assert_eq!(node_txn.len(), 1);
406 check_spends!(node_txn[0], remote_txn[0]);
407 assert_eq!(node_txn[0].input.len(), 1); //dropped HTLC
410 nodes[0].node.get_and_clear_pending_msg_events();
412 // Disconnect last block on node A, should regenerate a claiming tx with HTLC dropped
413 disconnect_blocks(&nodes[0], 1);
415 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
416 assert_eq!(node_txn.len(), 1);
417 check_spends!(node_txn[0], remote_txn[0]);
418 assert_eq!(node_txn[0].input.len(), 2); //resurrected HTLC
422 //// Disconnect one more block and then reconnect multiple no transaction should be generated
423 disconnect_blocks(&nodes[0], 1);
424 connect_blocks(&nodes[0], 15);
426 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
427 assert_eq!(node_txn.len(), 0);
432 fn do_test_to_remote_after_local_detection(style: ConnectStyle) {
433 // In previous code, detection of to_remote outputs in a counterparty commitment transaction
434 // was dependent on whether a local commitment transaction had been seen on-chain previously.
435 // This resulted in some edge cases around not being able to generate a SpendableOutput event
438 // Here, we test this by first confirming one set of commitment transactions, then
439 // disconnecting them and reconnecting another. We then confirm them and check that the correct
440 // SpendableOutput event is generated.
441 let chanmon_cfgs = create_chanmon_cfgs(2);
442 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
443 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
444 let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
446 *nodes[0].connect_style.borrow_mut() = style;
447 *nodes[1].connect_style.borrow_mut() = style;
449 let (_, _, chan_id, funding_tx) =
450 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 100_000_000, InitFeatures::known(), InitFeatures::known());
451 let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
452 assert_eq!(funding_outpoint.to_channel_id(), chan_id);
454 let remote_txn_a = get_local_commitment_txn!(nodes[0], chan_id);
455 let remote_txn_b = get_local_commitment_txn!(nodes[1], chan_id);
457 mine_transaction(&nodes[0], &remote_txn_a[0]);
458 mine_transaction(&nodes[1], &remote_txn_a[0]);
460 assert!(nodes[0].node.list_channels().is_empty());
461 check_closed_broadcast!(nodes[0], true);
462 check_added_monitors!(nodes[0], 1);
463 assert!(nodes[1].node.list_channels().is_empty());
464 check_closed_broadcast!(nodes[1], true);
465 check_added_monitors!(nodes[1], 1);
467 // Drop transactions broadcasted in response to the first commitment transaction (we have good
468 // test coverage of these things already elsewhere).
469 assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0).len(), 1);
470 assert_eq!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0).len(), 1);
472 assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
473 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
475 disconnect_blocks(&nodes[0], 1);
476 disconnect_blocks(&nodes[1], 1);
478 assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
479 assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
480 assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
481 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
483 connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
484 connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
486 assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
487 assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
488 assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
489 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
491 mine_transaction(&nodes[0], &remote_txn_b[0]);
492 mine_transaction(&nodes[1], &remote_txn_b[0]);
494 assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
495 assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
496 assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
497 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
499 connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
500 connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
502 let mut node_a_spendable = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
503 assert_eq!(node_a_spendable.len(), 1);
504 if let Event::SpendableOutputs { outputs } = node_a_spendable.pop().unwrap() {
505 assert_eq!(outputs.len(), 1);
506 let spend_tx = nodes[0].keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(),
507 Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, &Secp256k1::new()).unwrap();
508 check_spends!(spend_tx, remote_txn_b[0]);
511 // nodes[1] is waiting for the to_self_delay to expire, which is many more than
512 // ANTI_REORG_DELAY. Instead, walk it back and confirm the original remote_txn_a commitment
513 // again and check that nodes[1] generates a similar spendable output.
514 // Technically a reorg of ANTI_REORG_DELAY violates our assumptions, so this is undefined by
515 // our API spec, but we currently handle this correctly and there's little reason we shouldn't
517 assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
518 disconnect_blocks(&nodes[1], ANTI_REORG_DELAY);
519 mine_transaction(&nodes[1], &remote_txn_a[0]);
520 connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
522 let mut node_b_spendable = nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events();
523 assert_eq!(node_b_spendable.len(), 1);
524 if let Event::SpendableOutputs { outputs } = node_b_spendable.pop().unwrap() {
525 assert_eq!(outputs.len(), 1);
526 let spend_tx = nodes[1].keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(),
527 Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, &Secp256k1::new()).unwrap();
528 check_spends!(spend_tx, remote_txn_a[0]);
533 fn test_to_remote_after_local_detection() {
534 do_test_to_remote_after_local_detection(ConnectStyle::BestBlockFirst);
535 do_test_to_remote_after_local_detection(ConnectStyle::BestBlockFirstSkippingBlocks);
536 do_test_to_remote_after_local_detection(ConnectStyle::TransactionsFirst);
537 do_test_to_remote_after_local_detection(ConnectStyle::TransactionsFirstSkippingBlocks);
538 do_test_to_remote_after_local_detection(ConnectStyle::FullBlockViaListen);