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;
13 use ln::features::InitFeatures;
14 use ln::msgs::{ChannelMessageHandler, ErrorAction, HTLCFailChannelUpdate};
15 use util::events::{Event, EventsProvider, MessageSendEvent, MessageSendEventsProvider};
17 use bitcoin::blockdata::block::{Block, BlockHeader};
19 use std::default::Default;
22 use ln::functional_test_utils::*;
24 fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) {
25 // Our on-chain HTLC-claim learning has a few properties worth testing:
26 // * If an upstream HTLC is claimed with a preimage (both against our own commitment
27 // transaction our counterparty's), we claim it backwards immediately.
28 // * If an upstream HTLC is claimed with a timeout, we delay ANTI_REORG_DELAY before failing
29 // it backwards to ensure our counterparty can't claim with a preimage in a reorg.
31 // Here we test both properties in any combination based on the two bools passed in as
34 // If local_commitment is set, we first broadcast a local commitment containing an offered HTLC
35 // and an HTLC-Timeout tx, otherwise we broadcast a remote commitment containing a received
36 // HTLC and a local HTLC-Timeout tx spending it.
38 // We then either allow these transactions to confirm (if !claim) or we wait until one block
39 // before they otherwise would and reorg them out, confirming an HTLC-Success tx instead.
40 let chanmon_cfgs = create_chanmon_cfgs(3);
41 let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
42 let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
43 let nodes = create_network(3, &node_cfgs, &node_chanmgrs);
45 create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
46 let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
48 let (our_payment_preimage, our_payment_hash) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1000000);
50 // Provide preimage to node 2 by claiming payment
51 nodes[2].node.claim_funds(our_payment_preimage, &None, 1000000);
52 check_added_monitors!(nodes[2], 1);
53 get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
55 let header = BlockHeader { version: 0x2000_0000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
56 let claim_txn = if local_commitment {
57 // Broadcast node 1 commitment txn to broadcast the HTLC-Timeout
58 let node_1_commitment_txn = get_local_commitment_txn!(nodes[1], chan_2.2);
59 assert_eq!(node_1_commitment_txn.len(), 2); // 1 local commitment tx, 1 Outbound HTLC-Timeout
60 assert_eq!(node_1_commitment_txn[0].output.len(), 2); // to-self and Offered HTLC (to-remote/to-node-3 is dust)
61 check_spends!(node_1_commitment_txn[0], chan_2.3);
62 check_spends!(node_1_commitment_txn[1], node_1_commitment_txn[0]);
64 // Give node 2 node 1's transactions and get its response (claiming the HTLC instead).
65 connect_block(&nodes[2], &Block { header, txdata: node_1_commitment_txn.clone() }, CHAN_CONFIRM_DEPTH + 1);
66 check_added_monitors!(nodes[2], 1);
67 check_closed_broadcast!(nodes[2], false); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate)
68 let node_2_commitment_txn = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap();
69 assert_eq!(node_2_commitment_txn.len(), 3); // ChannelMonitor: 1 offered HTLC-Claim, ChannelManger: 1 local commitment tx, 1 Received HTLC-Claim
70 assert_eq!(node_2_commitment_txn[1].output.len(), 2); // to-remote and Received HTLC (to-self is dust)
71 check_spends!(node_2_commitment_txn[1], chan_2.3);
72 check_spends!(node_2_commitment_txn[2], node_2_commitment_txn[1]);
73 check_spends!(node_2_commitment_txn[0], node_1_commitment_txn[0]);
75 // Confirm node 1's commitment txn (and HTLC-Timeout) on node 1
76 connect_block(&nodes[1], &Block { header, txdata: node_1_commitment_txn.clone() }, CHAN_CONFIRM_DEPTH + 1);
78 // ...but return node 1's commitment tx in case claim is set and we're preparing to reorg
79 vec![node_1_commitment_txn[0].clone(), node_2_commitment_txn[0].clone()]
81 // Broadcast node 2 commitment txn
82 let node_2_commitment_txn = get_local_commitment_txn!(nodes[2], chan_2.2);
83 assert_eq!(node_2_commitment_txn.len(), 2); // 1 local commitment tx, 1 Received HTLC-Claim
84 assert_eq!(node_2_commitment_txn[0].output.len(), 2); // to-remote and Received HTLC (to-self is dust)
85 check_spends!(node_2_commitment_txn[0], chan_2.3);
86 check_spends!(node_2_commitment_txn[1], node_2_commitment_txn[0]);
88 // Give node 1 node 2's commitment transaction and get its response (timing the HTLC out)
89 connect_block(&nodes[1], &Block { header, txdata: vec![node_2_commitment_txn[0].clone()] }, CHAN_CONFIRM_DEPTH + 1);
90 let node_1_commitment_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
91 assert_eq!(node_1_commitment_txn.len(), 3); // ChannelMonitor: 1 offered HTLC-Timeout, ChannelManger: 1 local commitment tx, 1 Offered HTLC-Timeout
92 assert_eq!(node_1_commitment_txn[1].output.len(), 2); // to-local and Offered HTLC (to-remote is dust)
93 check_spends!(node_1_commitment_txn[1], chan_2.3);
94 check_spends!(node_1_commitment_txn[2], node_1_commitment_txn[1]);
95 check_spends!(node_1_commitment_txn[0], node_2_commitment_txn[0]);
97 // Confirm node 2's commitment txn (and node 1's HTLC-Timeout) on node 1
98 connect_block(&nodes[1], &Block { header, txdata: vec![node_2_commitment_txn[0].clone(), node_1_commitment_txn[0].clone()] }, CHAN_CONFIRM_DEPTH + 1);
99 // ...but return node 2's commitment tx (and claim) in case claim is set and we're preparing to reorg
100 node_2_commitment_txn
102 check_added_monitors!(nodes[1], 1);
103 check_closed_broadcast!(nodes[1], false); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate)
104 let mut block = Block { header, txdata: vec![] };
105 let mut blocks = Vec::new();
106 blocks.push(block.clone());
107 // At CHAN_CONFIRM_DEPTH + 1 we have a confirmation count of 1, so CHAN_CONFIRM_DEPTH +
108 // ANTI_REORG_DELAY - 1 will give us a confirmation count of ANTI_REORG_DELAY - 1.
109 for i in CHAN_CONFIRM_DEPTH + 2..CHAN_CONFIRM_DEPTH + ANTI_REORG_DELAY - 1 {
111 header: BlockHeader { version: 0x20000000, prev_blockhash: block.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 },
114 connect_block(&nodes[1], &block, i);
115 blocks.push(block.clone());
117 check_added_monitors!(nodes[1], 0);
118 assert_eq!(nodes[1].node.get_and_clear_pending_events().len(), 0);
121 // Now reorg back to CHAN_CONFIRM_DEPTH and confirm node 2's broadcasted transactions:
122 for (height, block) in (CHAN_CONFIRM_DEPTH + 1..CHAN_CONFIRM_DEPTH + ANTI_REORG_DELAY - 1).zip(blocks.iter()).rev() {
123 disconnect_block(&nodes[1], &block.header, height);
127 header: BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 },
130 connect_block(&nodes[1], &block, CHAN_CONFIRM_DEPTH + 1);
132 // ChannelManager only polls chain::Watch::release_pending_monitor_events when we
133 // probe it for events, so we probe non-message events here (which should still end up empty):
134 assert_eq!(nodes[1].node.get_and_clear_pending_events().len(), 0);
136 // Confirm the timeout tx and check that we fail the HTLC backwards
138 header: BlockHeader { version: 0x20000000, prev_blockhash: block.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 },
141 connect_block(&nodes[1], &block, CHAN_CONFIRM_DEPTH + ANTI_REORG_DELAY);
142 expect_pending_htlcs_forwardable!(nodes[1]);
145 check_added_monitors!(nodes[1], 1);
146 // Which should result in an immediate claim/fail of the HTLC:
147 let htlc_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
149 assert_eq!(htlc_updates.update_fulfill_htlcs.len(), 1);
150 nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &htlc_updates.update_fulfill_htlcs[0]);
152 assert_eq!(htlc_updates.update_fail_htlcs.len(), 1);
153 nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_updates.update_fail_htlcs[0]);
155 commitment_signed_dance!(nodes[0], nodes[1], htlc_updates.commitment_signed, false, true);
157 expect_payment_sent!(nodes[0], our_payment_preimage);
159 let events = nodes[0].node.get_and_clear_pending_msg_events();
160 assert_eq!(events.len(), 1);
161 if let MessageSendEvent::PaymentFailureNetworkUpdate { update: HTLCFailChannelUpdate::ChannelClosed { ref is_permanent, .. } } = events[0] {
162 assert!(is_permanent);
163 } else { panic!("Unexpected event!"); }
164 expect_payment_failed!(nodes[0], our_payment_hash, false);
169 fn test_onchain_htlc_claim_reorg_local_commitment() {
170 do_test_onchain_htlc_reorg(true, true);
173 fn test_onchain_htlc_timeout_delay_local_commitment() {
174 do_test_onchain_htlc_reorg(true, false);
177 fn test_onchain_htlc_claim_reorg_remote_commitment() {
178 do_test_onchain_htlc_reorg(false, true);
181 fn test_onchain_htlc_timeout_delay_remote_commitment() {
182 do_test_onchain_htlc_reorg(false, false);
186 fn test_unconf_chan() {
187 // After creating a chan between nodes, we disconnect all blocks previously seen to force a channel close on nodes[0] side
188 let chanmon_cfgs = create_chanmon_cfgs(2);
189 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
190 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
191 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
192 create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
194 let channel_state = nodes[0].node.channel_state.lock().unwrap();
195 assert_eq!(channel_state.by_id.len(), 1);
196 assert_eq!(channel_state.short_to_id.len(), 1);
197 mem::drop(channel_state);
199 let mut headers = Vec::new();
200 let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
201 headers.push(header.clone());
203 header = BlockHeader { version: 0x20000000, prev_blockhash: header.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
204 headers.push(header.clone());
206 while !headers.is_empty() {
207 nodes[0].node.block_disconnected(&headers.pop().unwrap());
209 check_closed_broadcast!(nodes[0], false);
210 check_added_monitors!(nodes[0], 1);
211 let channel_state = nodes[0].node.channel_state.lock().unwrap();
212 assert_eq!(channel_state.by_id.len(), 0);
213 assert_eq!(channel_state.short_to_id.len(), 0);
217 fn test_set_outpoints_partial_claiming() {
218 // - remote party claim tx, new bump tx
219 // - disconnect remote claiming tx, new bump
220 // - disconnect tx, see no tx anymore
221 let chanmon_cfgs = create_chanmon_cfgs(2);
222 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
223 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
224 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
226 let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1000000, 59000000, InitFeatures::known(), InitFeatures::known());
227 let payment_preimage_1 = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3_000_000).0;
228 let payment_preimage_2 = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3_000_000).0;
230 // Remote commitment txn with 4 outputs: to_local, to_remote, 2 outgoing HTLC
231 let remote_txn = get_local_commitment_txn!(nodes[1], chan.2);
232 assert_eq!(remote_txn.len(), 3);
233 assert_eq!(remote_txn[0].output.len(), 4);
234 assert_eq!(remote_txn[0].input.len(), 1);
235 assert_eq!(remote_txn[0].input[0].previous_output.txid, chan.3.txid());
236 check_spends!(remote_txn[1], remote_txn[0]);
237 check_spends!(remote_txn[2], remote_txn[0]);
239 // Connect blocks on node A to advance height towards TEST_FINAL_CLTV
240 let prev_header_100 = connect_blocks(&nodes[1], 100, 0, false, Default::default());
241 // Provide node A with both preimage
242 nodes[0].node.claim_funds(payment_preimage_1, &None, 3_000_000);
243 nodes[0].node.claim_funds(payment_preimage_2, &None, 3_000_000);
244 check_added_monitors!(nodes[0], 2);
245 nodes[0].node.get_and_clear_pending_events();
246 nodes[0].node.get_and_clear_pending_msg_events();
248 // Connect blocks on node A commitment transaction
249 let header = BlockHeader { version: 0x20000000, prev_blockhash: prev_header_100, merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
250 connect_block(&nodes[0], &Block { header, txdata: vec![remote_txn[0].clone()] }, 101);
251 check_closed_broadcast!(nodes[0], false);
252 check_added_monitors!(nodes[0], 1);
253 // Verify node A broadcast tx claiming both HTLCs
255 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
256 // ChannelMonitor: claim tx, ChannelManager: local commitment tx + HTLC-Success*2
257 assert_eq!(node_txn.len(), 4);
258 check_spends!(node_txn[0], remote_txn[0]);
259 check_spends!(node_txn[1], chan.3);
260 check_spends!(node_txn[2], node_txn[1]);
261 check_spends!(node_txn[3], node_txn[1]);
262 assert_eq!(node_txn[0].input.len(), 2);
266 // Connect blocks on node B
267 connect_blocks(&nodes[1], 135, 0, false, Default::default());
268 check_closed_broadcast!(nodes[1], false);
269 check_added_monitors!(nodes[1], 1);
270 // Verify node B broadcast 2 HTLC-timeout txn
271 let partial_claim_tx = {
272 let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
273 assert_eq!(node_txn.len(), 3);
274 check_spends!(node_txn[1], node_txn[0]);
275 check_spends!(node_txn[2], node_txn[0]);
276 assert_eq!(node_txn[1].input.len(), 1);
277 assert_eq!(node_txn[2].input.len(), 1);
281 // Broadcast partial claim on node A, should regenerate a claiming tx with HTLC dropped
282 let header = BlockHeader { version: 0x20000000, prev_blockhash: header.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
283 connect_block(&nodes[0], &Block { header, txdata: vec![partial_claim_tx.clone()] }, 102);
285 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
286 assert_eq!(node_txn.len(), 1);
287 check_spends!(node_txn[0], remote_txn[0]);
288 assert_eq!(node_txn[0].input.len(), 1); //dropped HTLC
291 nodes[0].node.get_and_clear_pending_msg_events();
293 // Disconnect last block on node A, should regenerate a claiming tx with HTLC dropped
294 disconnect_block(&nodes[0], &header, 102);
296 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
297 assert_eq!(node_txn.len(), 1);
298 check_spends!(node_txn[0], remote_txn[0]);
299 assert_eq!(node_txn[0].input.len(), 2); //resurrected HTLC
303 //// Disconnect one more block and then reconnect multiple no transaction should be generated
304 disconnect_block(&nodes[0], &header, 101);
305 connect_blocks(&nodes[1], 15, 101, false, prev_header_100);
307 let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap();
308 assert_eq!(node_txn.len(), 0);