_ Git - rust-lightning/blob - lightning/src/ln/monitor_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::sign::{EcdsaChannelSigner, SpendableOutputDescriptor};
  13 use crate::chain::channelmonitor::{ANTI_REORG_DELAY, LATENCY_GRACE_PERIOD_BLOCKS, Balance};
  14 use crate::chain::transaction::OutPoint;
  15 use crate::chain::chaininterface::{LowerBoundedFeeEstimator, compute_feerate_sat_per_1000_weight};
  16 use crate::events::bump_transaction::{BumpTransactionEvent, WalletSource};
  17 use crate::events::{Event, MessageSendEvent, MessageSendEventsProvider, ClosureReason, HTLCDestination};
  18 use crate::ln::channel;
  19 use crate::ln::channelmanager::{BREAKDOWN_TIMEOUT, PaymentId, RecipientOnionFields};
  20 use crate::ln::msgs::ChannelMessageHandler;
  21 use crate::util::config::UserConfig;
  22 use crate::util::crypto::sign;
  23 use crate::util::ser::Writeable;
  24 use crate::util::scid_utils::block_from_scid;
  25 use crate::util::test_utils;
  26
  27 use bitcoin::blockdata::transaction::EcdsaSighashType;
  28 use bitcoin::blockdata::script::Builder;
  29 use bitcoin::blockdata::opcodes;
  30 use bitcoin::secp256k1::{Secp256k1, SecretKey};
  31 use bitcoin::{Amount, PublicKey, Script, Transaction, TxIn, TxOut, PackedLockTime, Witness};
  32 use bitcoin::util::sighash::SighashCache;
  33
  34 use crate::prelude::*;
  35
  36 use crate::ln::functional_test_utils::*;
  37
  38 #[test]
  39 fn chanmon_fail_from_stale_commitment() {
  40         // If we forward an HTLC to our counterparty, but we force-closed the channel before our
  41         // counterparty provides us an updated commitment transaction, we'll end up with a commitment
  42         // transaction that does not contain the HTLC which we attempted to forward. In this case, we
  43         // need to wait `ANTI_REORG_DELAY` blocks and then fail back the HTLC as there is no way for us
  44         // to learn the preimage and the confirmed commitment transaction paid us the value of the
  45         // HTLC.
  46         //
  47         // However, previously, we did not do this, ignoring the HTLC entirely.
  48         //
  49         // This could lead to channel closure if the sender we received the HTLC from decides to go on
  50         // chain to get their HTLC back before it times out.
  51         //
  52         // Here, we check exactly this case, forwarding a payment from A, through B, to C, before B
  53         // broadcasts its latest commitment transaction, which should result in it eventually failing
  54         // the HTLC back off-chain to A.
  55         let chanmon_cfgs = create_chanmon_cfgs(3);
  56         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
  57         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
  58         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
  59
  60         create_announced_chan_between_nodes(&nodes, 0, 1);
  61         let (update_a, _, chan_id_2, _) = create_announced_chan_between_nodes(&nodes, 1, 2);
  62
  63         let (route, payment_hash, _, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], 1_000_000);
  64         nodes[0].node.send_payment_with_route(&route, payment_hash,
  65                 RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_hash.0)).unwrap();
  66         check_added_monitors!(nodes[0], 1);
  67
  68         let bs_txn = get_local_commitment_txn!(nodes[1], chan_id_2);
  69
  70         let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
  71         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
  72         commitment_signed_dance!(nodes[1], nodes[0], updates.commitment_signed, false);
  73
  74         expect_pending_htlcs_forwardable!(nodes[1]);
  75         get_htlc_update_msgs!(nodes[1], nodes[2].node.get_our_node_id());
  76         check_added_monitors!(nodes[1], 1);
  77
  78         // Don't bother delivering the new HTLC add/commits, instead confirming the pre-HTLC commitment
  79         // transaction for nodes[1].
  80         mine_transaction(&nodes[1], &bs_txn[0]);
  81         check_added_monitors!(nodes[1], 1);
  82         check_closed_broadcast!(nodes[1], true);
  83         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed, [nodes[2].node.get_our_node_id()], 100000);
  84         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
  85
  86         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
  87         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_id_2 }]);
  88         check_added_monitors!(nodes[1], 1);
  89         let fail_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
  90
  91         nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &fail_updates.update_fail_htlcs[0]);
  92         commitment_signed_dance!(nodes[0], nodes[1], fail_updates.commitment_signed, true, true);
  93         expect_payment_failed_with_update!(nodes[0], payment_hash, false, update_a.contents.short_channel_id, true);
  94 }
  95
  96 fn test_spendable_output<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, spendable_tx: &Transaction) -> Vec<SpendableOutputDescriptor> {
  97         let mut spendable = node.chain_monitor.chain_monitor.get_and_clear_pending_events();
  98         assert_eq!(spendable.len(), 1);
  99         if let Event::SpendableOutputs { outputs, .. } = spendable.pop().unwrap() {
 100                 assert_eq!(outputs.len(), 1);
 101                 let spend_tx = node.keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(),
 102                         Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, None, &Secp256k1::new()).unwrap();
 103                 check_spends!(spend_tx, spendable_tx);
 104                 outputs
 105         } else { panic!(); }
 106 }
 107
 108 #[test]
 109 fn revoked_output_htlc_resolution_timing() {
 110         // Tests that HTLCs which were present in a broadcasted remote revoked commitment transaction
 111         // are resolved only after a spend of the HTLC output reaches six confirmations. Preivously
 112         // they would resolve after the revoked commitment transaction itself reaches six
 113         // confirmations.
 114         let chanmon_cfgs = create_chanmon_cfgs(2);
 115         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 116         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 117         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 118
 119         let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 500_000_000);
 120
 121         let payment_hash_1 = route_payment(&nodes[1], &[&nodes[0]], 1_000_000).1;
 122
 123         // Get a commitment transaction which contains the HTLC we care about, but which we'll revoke
 124         // before forwarding.
 125         let revoked_local_txn = get_local_commitment_txn!(nodes[0], chan.2);
 126         assert_eq!(revoked_local_txn.len(), 1);
 127
 128         // Route a dust payment to revoke the above commitment transaction
 129         route_payment(&nodes[0], &[&nodes[1]], 1_000);
 130
 131         // Confirm the revoked commitment transaction, closing the channel.
 132         mine_transaction(&nodes[1], &revoked_local_txn[0]);
 133         check_added_monitors!(nodes[1], 1);
 134         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed, [nodes[0].node.get_our_node_id()], 1000000);
 135         check_closed_broadcast!(nodes[1], true);
 136
 137         let bs_spend_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 138         assert_eq!(bs_spend_txn.len(), 1);
 139         check_spends!(bs_spend_txn[0], revoked_local_txn[0]);
 140
 141         // After the commitment transaction confirms, we should still wait on the HTLC spend
 142         // transaction to confirm before resolving the HTLC.
 143         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 144         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 145         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 146
 147         // Spend the HTLC output, generating a HTLC failure event after ANTI_REORG_DELAY confirmations.
 148         mine_transaction(&nodes[1], &bs_spend_txn[0]);
 149         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 150         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 151
 152         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 153         expect_payment_failed!(nodes[1], payment_hash_1, false);
 154 }
 155
 156 #[test]
 157 fn chanmon_claim_value_coop_close() {
 158         // Tests `get_claimable_balances` returns the correct values across a simple cooperative claim.
 159         // Specifically, this tests that the channel non-HTLC balances show up in
 160         // `get_claimable_balances` until the cooperative claims have confirmed and generated a
 161         // `SpendableOutputs` event, and no longer.
 162         let chanmon_cfgs = create_chanmon_cfgs(2);
 163         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 164         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 165         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 166
 167         let (_, _, chan_id, funding_tx) =
 168                 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 1_000_000);
 169         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
 170         assert_eq!(funding_outpoint.to_channel_id(), chan_id);
 171
 172         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
 173         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
 174
 175         assert_eq!(vec![Balance::ClaimableOnChannelClose {
 176                         amount_satoshis: 1_000_000 - 1_000 - chan_feerate * channel::commitment_tx_base_weight(&channel_type_features) / 1000
 177                 }],
 178                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 179         assert_eq!(vec![Balance::ClaimableOnChannelClose { amount_satoshis: 1_000, }],
 180                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 181
 182         nodes[0].node.close_channel(&chan_id, &nodes[1].node.get_our_node_id()).unwrap();
 183         let node_0_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
 184         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
 185         let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
 186         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
 187
 188         let node_0_closing_signed = get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id());
 189         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_closing_signed);
 190         let node_1_closing_signed = get_event_msg!(nodes[1], MessageSendEvent::SendClosingSigned, nodes[0].node.get_our_node_id());
 191         nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &node_1_closing_signed);
 192         let (_, node_0_2nd_closing_signed) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
 193         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_2nd_closing_signed.unwrap());
 194         let (_, node_1_none) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
 195         assert!(node_1_none.is_none());
 196
 197         let shutdown_tx = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 198         assert_eq!(shutdown_tx, nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0));
 199         assert_eq!(shutdown_tx.len(), 1);
 200
 201         let shutdown_tx_conf_height_a = block_from_scid(&mine_transaction(&nodes[0], &shutdown_tx[0]));
 202         let shutdown_tx_conf_height_b = block_from_scid(&mine_transaction(&nodes[1], &shutdown_tx[0]));
 203
 204         assert!(nodes[0].node.list_channels().is_empty());
 205         assert!(nodes[1].node.list_channels().is_empty());
 206
 207         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 208         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 209
 210         assert_eq!(vec![Balance::ClaimableAwaitingConfirmations {
 211                         amount_satoshis: 1_000_000 - 1_000 - chan_feerate * channel::commitment_tx_base_weight(&channel_type_features) / 1000,
 212                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1,
 213                 }],
 214                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 215         assert_eq!(vec![Balance::ClaimableAwaitingConfirmations {
 216                         amount_satoshis: 1000,
 217                         confirmation_height: nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1,
 218                 }],
 219                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 220
 221         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 2);
 222         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
 223
 224         assert!(get_monitor!(nodes[0], chan_id)
 225                 .get_spendable_outputs(&shutdown_tx[0], shutdown_tx_conf_height_a).is_empty());
 226         assert!(get_monitor!(nodes[1], chan_id)
 227                 .get_spendable_outputs(&shutdown_tx[0], shutdown_tx_conf_height_b).is_empty());
 228
 229         connect_blocks(&nodes[0], 1);
 230         connect_blocks(&nodes[1], 1);
 231
 232         assert_eq!(Vec::<Balance>::new(),
 233                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 234         assert_eq!(Vec::<Balance>::new(),
 235                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 236
 237         let spendable_outputs_a = test_spendable_output(&nodes[0], &shutdown_tx[0]);
 238         assert_eq!(
 239                 get_monitor!(nodes[0], chan_id).get_spendable_outputs(&shutdown_tx[0], shutdown_tx_conf_height_a),
 240                 spendable_outputs_a
 241         );
 242
 243         let spendable_outputs_b = test_spendable_output(&nodes[1], &shutdown_tx[0]);
 244         assert_eq!(
 245                 get_monitor!(nodes[1], chan_id).get_spendable_outputs(&shutdown_tx[0], shutdown_tx_conf_height_b),
 246                 spendable_outputs_b
 247         );
 248
 249         check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure, [nodes[1].node.get_our_node_id()], 1000000);
 250         check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure, [nodes[0].node.get_our_node_id()], 1000000);
 251 }
 252
 253 fn sorted_vec<T: Ord>(mut v: Vec<T>) -> Vec<T> {
 254         v.sort_unstable();
 255         v
 256 }
 257
 258 /// Asserts that `a` and `b` are close, but maybe off by up to 5.
 259 /// This is useful when checking fees and weights on transactions as things may vary by a few based
 260 /// on signature size and signature size estimation being non-exact.
 261 fn fuzzy_assert_eq<V: core::convert::TryInto<u64>>(a: V, b: V) {
 262         let a_u64 = a.try_into().map_err(|_| ()).unwrap();
 263         let b_u64 = b.try_into().map_err(|_| ()).unwrap();
 264         eprintln!("Checking {} and {} for fuzzy equality", a_u64, b_u64);
 265         assert!(a_u64 >= b_u64 - 5);
 266         assert!(b_u64 >= a_u64 - 5);
 267 }
 268
 269 fn do_test_claim_value_force_close(prev_commitment_tx: bool) {
 270         // Tests `get_claimable_balances` with an HTLC across a force-close.
 271         // We build a channel with an HTLC pending, then force close the channel and check that the
 272         // `get_claimable_balances` return value is correct as transactions confirm on-chain.
 273         let mut chanmon_cfgs = create_chanmon_cfgs(2);
 274         if prev_commitment_tx {
 275                 // We broadcast a second-to-latest commitment transaction, without providing the revocation
 276                 // secret to the counterparty. However, because we always immediately take the revocation
 277                 // secret from the keys_manager, we would panic at broadcast as we're trying to sign a
 278                 // transaction which, from the point of view of our keys_manager, is revoked.
 279                 chanmon_cfgs[1].keys_manager.disable_revocation_policy_check = true;
 280         }
 281         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 282         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 283         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 284
 285         let (_, _, chan_id, funding_tx) =
 286                 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 1_000_000);
 287         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
 288         assert_eq!(funding_outpoint.to_channel_id(), chan_id);
 289
 290         // This HTLC is immediately claimed, giving node B the preimage
 291         let (payment_preimage, payment_hash, ..) = route_payment(&nodes[0], &[&nodes[1]], 3_000_000);
 292         // This HTLC is allowed to time out, letting A claim it. However, in order to test claimable
 293         // balances more fully we also give B the preimage for this HTLC.
 294         let (timeout_payment_preimage, timeout_payment_hash, ..) = route_payment(&nodes[0], &[&nodes[1]], 4_000_000);
 295         // This HTLC will be dust, and not be claimable at all:
 296         let (dust_payment_preimage, dust_payment_hash, ..) = route_payment(&nodes[0], &[&nodes[1]], 3_000);
 297
 298         let htlc_cltv_timeout = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
 299
 300         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
 301         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
 302
 303         let remote_txn = get_local_commitment_txn!(nodes[1], chan_id);
 304         let sent_htlc_balance = Balance::MaybeTimeoutClaimableHTLC {
 305                 amount_satoshis: 3_000,
 306                 claimable_height: htlc_cltv_timeout,
 307                 payment_hash,
 308         };
 309         let sent_htlc_timeout_balance = Balance::MaybeTimeoutClaimableHTLC {
 310                 amount_satoshis: 4_000,
 311                 claimable_height: htlc_cltv_timeout,
 312                 payment_hash: timeout_payment_hash,
 313         };
 314         let received_htlc_balance = Balance::MaybePreimageClaimableHTLC {
 315                 amount_satoshis: 3_000,
 316                 expiry_height: htlc_cltv_timeout,
 317                 payment_hash,
 318         };
 319         let received_htlc_timeout_balance = Balance::MaybePreimageClaimableHTLC {
 320                 amount_satoshis: 4_000,
 321                 expiry_height: htlc_cltv_timeout,
 322                 payment_hash: timeout_payment_hash,
 323         };
 324         let received_htlc_claiming_balance = Balance::ContentiousClaimable {
 325                 amount_satoshis: 3_000,
 326                 timeout_height: htlc_cltv_timeout,
 327                 payment_hash,
 328                 payment_preimage,
 329         };
 330         let received_htlc_timeout_claiming_balance = Balance::ContentiousClaimable {
 331                 amount_satoshis: 4_000,
 332                 timeout_height: htlc_cltv_timeout,
 333                 payment_hash: timeout_payment_hash,
 334                 payment_preimage: timeout_payment_preimage,
 335         };
 336
 337         // Before B receives the payment preimage, it only suggests the push_msat value of 1_000 sats
 338         // as claimable. A lists both its to-self balance and the (possibly-claimable) HTLCs.
 339         assert_eq!(sorted_vec(vec![Balance::ClaimableOnChannelClose {
 340                         amount_satoshis: 1_000_000 - 3_000 - 4_000 - 1_000 - 3 - chan_feerate *
 341                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 342                 }, sent_htlc_balance.clone(), sent_htlc_timeout_balance.clone()]),
 343                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 344         assert_eq!(sorted_vec(vec![Balance::ClaimableOnChannelClose {
 345                         amount_satoshis: 1_000,
 346                 }, received_htlc_balance.clone(), received_htlc_timeout_balance.clone()]),
 347                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 348
 349         nodes[1].node.claim_funds(payment_preimage);
 350         check_added_monitors!(nodes[1], 1);
 351         expect_payment_claimed!(nodes[1], payment_hash, 3_000_000);
 352
 353         let b_htlc_msgs = get_htlc_update_msgs!(&nodes[1], nodes[0].node.get_our_node_id());
 354         // We claim the dust payment here as well, but it won't impact our claimable balances as its
 355         // dust and thus doesn't appear on chain at all.
 356         nodes[1].node.claim_funds(dust_payment_preimage);
 357         check_added_monitors!(nodes[1], 1);
 358         expect_payment_claimed!(nodes[1], dust_payment_hash, 3_000);
 359
 360         nodes[1].node.claim_funds(timeout_payment_preimage);
 361         check_added_monitors!(nodes[1], 1);
 362         expect_payment_claimed!(nodes[1], timeout_payment_hash, 4_000_000);
 363
 364         if prev_commitment_tx {
 365                 // To build a previous commitment transaction, deliver one round of commitment messages.
 366                 nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &b_htlc_msgs.update_fulfill_htlcs[0]);
 367                 expect_payment_sent(&nodes[0], payment_preimage, None, false, false);
 368                 nodes[0].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &b_htlc_msgs.commitment_signed);
 369                 check_added_monitors!(nodes[0], 1);
 370                 let (as_raa, as_cs) = get_revoke_commit_msgs!(nodes[0], nodes[1].node.get_our_node_id());
 371                 nodes[1].node.handle_revoke_and_ack(&nodes[0].node.get_our_node_id(), &as_raa);
 372                 let _htlc_updates = get_htlc_update_msgs!(&nodes[1], nodes[0].node.get_our_node_id());
 373                 check_added_monitors!(nodes[1], 1);
 374                 nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &as_cs);
 375                 let _bs_raa = get_event_msg!(nodes[1], MessageSendEvent::SendRevokeAndACK, nodes[0].node.get_our_node_id());
 376                 check_added_monitors!(nodes[1], 1);
 377         }
 378
 379         // Once B has received the payment preimage, it includes the value of the HTLC in its
 380         // "claimable if you were to close the channel" balance.
 381         let mut a_expected_balances = vec![Balance::ClaimableOnChannelClose {
 382                         amount_satoshis: 1_000_000 - // Channel funding value in satoshis
 383                                 4_000 - // The to-be-failed HTLC value in satoshis
 384                                 3_000 - // The claimed HTLC value in satoshis
 385                                 1_000 - // The push_msat value in satoshis
 386                                 3 - // The dust HTLC value in satoshis
 387                                 // The commitment transaction fee with two HTLC outputs:
 388                                 chan_feerate * (channel::commitment_tx_base_weight(&channel_type_features) +
 389                                                                 if prev_commitment_tx { 1 } else { 2 } *
 390                                                                 channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 391                 }, sent_htlc_timeout_balance.clone()];
 392         if !prev_commitment_tx {
 393                 a_expected_balances.push(sent_htlc_balance.clone());
 394         }
 395         assert_eq!(sorted_vec(a_expected_balances),
 396                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 397         assert_eq!(vec![Balance::ClaimableOnChannelClose {
 398                         amount_satoshis: 1_000 + 3_000 + 4_000,
 399                 }],
 400                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 401
 402         // Broadcast the closing transaction (which has both pending HTLCs in it) and get B's
 403         // broadcasted HTLC claim transaction with preimage.
 404         let node_b_commitment_claimable = nodes[1].best_block_info().1 + BREAKDOWN_TIMEOUT as u32;
 405         mine_transaction(&nodes[0], &remote_txn[0]);
 406         mine_transaction(&nodes[1], &remote_txn[0]);
 407
 408         let b_broadcast_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 409         assert_eq!(b_broadcast_txn.len(), 2);
 410         // b_broadcast_txn should spend the HTLCs output of the commitment tx for 3_000 and 4_000 sats
 411         check_spends!(b_broadcast_txn[0], remote_txn[0]);
 412         check_spends!(b_broadcast_txn[1], remote_txn[0]);
 413         assert_eq!(b_broadcast_txn[0].input.len(), 1);
 414         assert_eq!(b_broadcast_txn[1].input.len(), 1);
 415         assert_eq!(remote_txn[0].output[b_broadcast_txn[0].input[0].previous_output.vout as usize].value, 3_000);
 416         assert_eq!(remote_txn[0].output[b_broadcast_txn[1].input[0].previous_output.vout as usize].value, 4_000);
 417
 418         assert!(nodes[0].node.list_channels().is_empty());
 419         check_closed_broadcast!(nodes[0], true);
 420         check_added_monitors!(nodes[0], 1);
 421         check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed, [nodes[1].node.get_our_node_id()], 1000000);
 422         assert!(nodes[1].node.list_channels().is_empty());
 423         check_closed_broadcast!(nodes[1], true);
 424         check_added_monitors!(nodes[1], 1);
 425         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed, [nodes[0].node.get_our_node_id()], 1000000);
 426         assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
 427         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 428
 429         // Once the commitment transaction confirms, we will wait until ANTI_REORG_DELAY until we
 430         // generate any `SpendableOutputs` events. Thus, the same balances will still be listed
 431         // available in `get_claimable_balances`. However, both will swap from `ClaimableOnClose` to
 432         // other Balance variants, as close has already happened.
 433         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 434         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 435
 436         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 437                         amount_satoshis: 1_000_000 - 3_000 - 4_000 - 1_000 - 3 - chan_feerate *
 438                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 439                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1,
 440                 }, sent_htlc_balance.clone(), sent_htlc_timeout_balance.clone()]),
 441                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 442         // The main non-HTLC balance is just awaiting confirmations, but the claimable height is the
 443         // CSV delay, not ANTI_REORG_DELAY.
 444         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 445                         amount_satoshis: 1_000,
 446                         confirmation_height: node_b_commitment_claimable,
 447                 },
 448                 // Both HTLC balances are "contentious" as our counterparty could claim them if we wait too
 449                 // long.
 450                 received_htlc_claiming_balance.clone(), received_htlc_timeout_claiming_balance.clone()]),
 451                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 452
 453         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
 454         expect_payment_failed!(nodes[0], dust_payment_hash, false);
 455         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 456
 457         // After ANTI_REORG_DELAY, A will consider its balance fully spendable and generate a
 458         // `SpendableOutputs` event. However, B still has to wait for the CSV delay.
 459         assert_eq!(sorted_vec(vec![sent_htlc_balance.clone(), sent_htlc_timeout_balance.clone()]),
 460                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 461         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 462                         amount_satoshis: 1_000,
 463                         confirmation_height: node_b_commitment_claimable,
 464                 }, received_htlc_claiming_balance.clone(), received_htlc_timeout_claiming_balance.clone()]),
 465                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 466
 467         test_spendable_output(&nodes[0], &remote_txn[0]);
 468         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 469
 470         // After broadcasting the HTLC claim transaction, node A will still consider the HTLC
 471         // possibly-claimable up to ANTI_REORG_DELAY, at which point it will drop it.
 472         mine_transaction(&nodes[0], &b_broadcast_txn[0]);
 473         if prev_commitment_tx {
 474                 expect_payment_path_successful!(nodes[0]);
 475         } else {
 476                 expect_payment_sent(&nodes[0], payment_preimage, None, true, false);
 477         }
 478         assert_eq!(sorted_vec(vec![sent_htlc_balance.clone(), sent_htlc_timeout_balance.clone()]),
 479                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 480         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
 481         assert_eq!(vec![sent_htlc_timeout_balance.clone()],
 482                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 483
 484         // When the HTLC timeout output is spendable in the next block, A should broadcast it
 485         connect_blocks(&nodes[0], htlc_cltv_timeout - nodes[0].best_block_info().1);
 486         let a_broadcast_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 487         assert_eq!(a_broadcast_txn.len(), 2);
 488         assert_eq!(a_broadcast_txn[0].input.len(), 1);
 489         check_spends!(a_broadcast_txn[0], remote_txn[0]);
 490         assert_eq!(a_broadcast_txn[1].input.len(), 1);
 491         check_spends!(a_broadcast_txn[1], remote_txn[0]);
 492         assert_ne!(a_broadcast_txn[0].input[0].previous_output.vout,
 493                    a_broadcast_txn[1].input[0].previous_output.vout);
 494         // a_broadcast_txn [0] and [1] should spend the HTLC outputs of the commitment tx
 495         assert_eq!(remote_txn[0].output[a_broadcast_txn[0].input[0].previous_output.vout as usize].value, 3_000);
 496         assert_eq!(remote_txn[0].output[a_broadcast_txn[1].input[0].previous_output.vout as usize].value, 4_000);
 497
 498         // Once the HTLC-Timeout transaction confirms, A will no longer consider the HTLC
 499         // "MaybeClaimable", but instead move it to "AwaitingConfirmations".
 500         mine_transaction(&nodes[0], &a_broadcast_txn[1]);
 501         assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
 502         assert_eq!(vec![Balance::ClaimableAwaitingConfirmations {
 503                         amount_satoshis: 4_000,
 504                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1,
 505                 }],
 506                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 507         // After ANTI_REORG_DELAY, A will generate a SpendableOutputs event and drop the claimable
 508         // balance entry.
 509         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
 510         assert_eq!(Vec::<Balance>::new(),
 511                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 512         expect_payment_failed!(nodes[0], timeout_payment_hash, false);
 513
 514         test_spendable_output(&nodes[0], &a_broadcast_txn[1]);
 515
 516         // Node B will no longer consider the HTLC "contentious" after the HTLC claim transaction
 517         // confirms, and consider it simply "awaiting confirmations". Note that it has to wait for the
 518         // standard revocable transaction CSV delay before receiving a `SpendableOutputs`.
 519         let node_b_htlc_claimable = nodes[1].best_block_info().1 + BREAKDOWN_TIMEOUT as u32;
 520         mine_transaction(&nodes[1], &b_broadcast_txn[0]);
 521
 522         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 523                         amount_satoshis: 1_000,
 524                         confirmation_height: node_b_commitment_claimable,
 525                 }, Balance::ClaimableAwaitingConfirmations {
 526                         amount_satoshis: 3_000,
 527                         confirmation_height: node_b_htlc_claimable,
 528                 }, received_htlc_timeout_claiming_balance.clone()]),
 529                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 530
 531         // After reaching the commitment output CSV, we'll get a SpendableOutputs event for it and have
 532         // only the HTLCs claimable on node B.
 533         connect_blocks(&nodes[1], node_b_commitment_claimable - nodes[1].best_block_info().1);
 534         test_spendable_output(&nodes[1], &remote_txn[0]);
 535
 536         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 537                         amount_satoshis: 3_000,
 538                         confirmation_height: node_b_htlc_claimable,
 539                 }, received_htlc_timeout_claiming_balance.clone()]),
 540                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 541
 542         // After reaching the claimed HTLC output CSV, we'll get a SpendableOutptus event for it and
 543         // have only one HTLC output left spendable.
 544         connect_blocks(&nodes[1], node_b_htlc_claimable - nodes[1].best_block_info().1);
 545         test_spendable_output(&nodes[1], &b_broadcast_txn[0]);
 546
 547         assert_eq!(vec![received_htlc_timeout_claiming_balance.clone()],
 548                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 549
 550         // Finally, mine the HTLC timeout transaction that A broadcasted (even though B should be able
 551         // to claim this HTLC with the preimage it knows!). It will remain listed as a claimable HTLC
 552         // until ANTI_REORG_DELAY confirmations on the spend.
 553         mine_transaction(&nodes[1], &a_broadcast_txn[1]);
 554         assert_eq!(vec![received_htlc_timeout_claiming_balance.clone()],
 555                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 556         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 557         assert_eq!(Vec::<Balance>::new(),
 558                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 559
 560         // Ensure that even if we connect more blocks, potentially replaying the entire chain if we're
 561         // using `ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks`, we don't get new
 562         // monitor events or claimable balances.
 563         for node in nodes.iter() {
 564                 connect_blocks(node, 6);
 565                 connect_blocks(node, 6);
 566                 assert!(node.chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 567                 assert!(node.chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
 568         }
 569 }
 570
 571 #[test]
 572 fn test_claim_value_force_close() {
 573         do_test_claim_value_force_close(true);
 574         do_test_claim_value_force_close(false);
 575 }
 576
 577 #[test]
 578 fn test_balances_on_local_commitment_htlcs() {
 579         // Previously, when handling the broadcast of a local commitment transactions (with associated
 580         // CSV delays prior to spendability), we incorrectly handled the CSV delays on HTLC
 581         // transactions. This caused us to miss spendable outputs for HTLCs which were awaiting a CSV
 582         // delay prior to spendability.
 583         //
 584         // Further, because of this, we could hit an assertion as `get_claimable_balances` asserted
 585         // that HTLCs were resolved after the funding spend was resolved, which was not true if the
 586         // HTLC did not have a CSV delay attached (due to the above bug or due to it being an HTLC
 587         // claim by our counterparty).
 588         let chanmon_cfgs = create_chanmon_cfgs(2);
 589         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 590         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 591         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 592
 593         // Create a single channel with two pending HTLCs from nodes[0] to nodes[1], one which nodes[1]
 594         // knows the preimage for, one which it does not.
 595         let (_, _, chan_id, funding_tx) = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
 596         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
 597
 598         let (route, payment_hash, _, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[1], 10_000_000);
 599         let htlc_cltv_timeout = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
 600         nodes[0].node.send_payment_with_route(&route, payment_hash,
 601                 RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_hash.0)).unwrap();
 602         check_added_monitors!(nodes[0], 1);
 603
 604         let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
 605         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
 606         commitment_signed_dance!(nodes[1], nodes[0], updates.commitment_signed, false);
 607
 608         expect_pending_htlcs_forwardable!(nodes[1]);
 609         expect_payment_claimable!(nodes[1], payment_hash, payment_secret, 10_000_000);
 610
 611         let (route_2, payment_hash_2, payment_preimage_2, payment_secret_2) = get_route_and_payment_hash!(nodes[0], nodes[1], 20_000_000);
 612         nodes[0].node.send_payment_with_route(&route_2, payment_hash_2,
 613                 RecipientOnionFields::secret_only(payment_secret_2), PaymentId(payment_hash_2.0)).unwrap();
 614         check_added_monitors!(nodes[0], 1);
 615
 616         let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
 617         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
 618         commitment_signed_dance!(nodes[1], nodes[0], updates.commitment_signed, false);
 619
 620         expect_pending_htlcs_forwardable!(nodes[1]);
 621         expect_payment_claimable!(nodes[1], payment_hash_2, payment_secret_2, 20_000_000);
 622         nodes[1].node.claim_funds(payment_preimage_2);
 623         get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 624         check_added_monitors!(nodes[1], 1);
 625         expect_payment_claimed!(nodes[1], payment_hash_2, 20_000_000);
 626
 627         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
 628         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
 629
 630         // Get nodes[0]'s commitment transaction and HTLC-Timeout transactions
 631         let as_txn = get_local_commitment_txn!(nodes[0], chan_id);
 632         assert_eq!(as_txn.len(), 3);
 633         check_spends!(as_txn[1], as_txn[0]);
 634         check_spends!(as_txn[2], as_txn[0]);
 635         check_spends!(as_txn[0], funding_tx);
 636
 637         // First confirm the commitment transaction on nodes[0], which should leave us with three
 638         // claimable balances.
 639         let node_a_commitment_claimable = nodes[0].best_block_info().1 + BREAKDOWN_TIMEOUT as u32;
 640         mine_transaction(&nodes[0], &as_txn[0]);
 641         check_added_monitors!(nodes[0], 1);
 642         check_closed_broadcast!(nodes[0], true);
 643         check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed, [nodes[1].node.get_our_node_id()], 1000000);
 644
 645         let htlc_balance_known_preimage = Balance::MaybeTimeoutClaimableHTLC {
 646                 amount_satoshis: 10_000,
 647                 claimable_height: htlc_cltv_timeout,
 648                 payment_hash,
 649         };
 650         let htlc_balance_unknown_preimage = Balance::MaybeTimeoutClaimableHTLC {
 651                 amount_satoshis: 20_000,
 652                 claimable_height: htlc_cltv_timeout,
 653                 payment_hash: payment_hash_2,
 654         };
 655
 656         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 657                         amount_satoshis: 1_000_000 - 10_000 - 20_000 - chan_feerate *
 658                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 659                         confirmation_height: node_a_commitment_claimable,
 660                 }, htlc_balance_known_preimage.clone(), htlc_balance_unknown_preimage.clone()]),
 661                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 662
 663         // Get nodes[1]'s HTLC claim tx for the second HTLC
 664         mine_transaction(&nodes[1], &as_txn[0]);
 665         check_added_monitors!(nodes[1], 1);
 666         check_closed_broadcast!(nodes[1], true);
 667         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed, [nodes[0].node.get_our_node_id()], 1000000);
 668         let bs_htlc_claim_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 669         assert_eq!(bs_htlc_claim_txn.len(), 1);
 670         check_spends!(bs_htlc_claim_txn[0], as_txn[0]);
 671
 672         // Connect blocks until the HTLCs expire, allowing us to (validly) broadcast the HTLC-Timeout
 673         // transaction.
 674         connect_blocks(&nodes[0], TEST_FINAL_CLTV - 1);
 675         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 676                         amount_satoshis: 1_000_000 - 10_000 - 20_000 - chan_feerate *
 677                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 678                         confirmation_height: node_a_commitment_claimable,
 679                 }, htlc_balance_known_preimage.clone(), htlc_balance_unknown_preimage.clone()]),
 680                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 681         assert_eq!(as_txn[1].lock_time.0, nodes[0].best_block_info().1 + 1); // as_txn[1] can be included in the next block
 682
 683         // Now confirm nodes[0]'s HTLC-Timeout transaction, which changes the claimable balance to an
 684         // "awaiting confirmations" one.
 685         let node_a_htlc_claimable = nodes[0].best_block_info().1 + BREAKDOWN_TIMEOUT as u32;
 686         mine_transaction(&nodes[0], &as_txn[1]);
 687         // Note that prior to the fix in the commit which introduced this test, this (and the next
 688         // balance) check failed. With this check removed, the code panicked in the `connect_blocks`
 689         // call, as described, two hunks down.
 690         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 691                         amount_satoshis: 1_000_000 - 10_000 - 20_000 - chan_feerate *
 692                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 693                         confirmation_height: node_a_commitment_claimable,
 694                 }, Balance::ClaimableAwaitingConfirmations {
 695                         amount_satoshis: 10_000,
 696                         confirmation_height: node_a_htlc_claimable,
 697                 }, htlc_balance_unknown_preimage.clone()]),
 698                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 699
 700         // Now confirm nodes[1]'s HTLC claim, giving nodes[0] the preimage. Note that the "maybe
 701         // claimable" balance remains until we see ANTI_REORG_DELAY blocks.
 702         mine_transaction(&nodes[0], &bs_htlc_claim_txn[0]);
 703         expect_payment_sent(&nodes[0], payment_preimage_2, None, true, false);
 704         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 705                         amount_satoshis: 1_000_000 - 10_000 - 20_000 - chan_feerate *
 706                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 707                         confirmation_height: node_a_commitment_claimable,
 708                 }, Balance::ClaimableAwaitingConfirmations {
 709                         amount_satoshis: 10_000,
 710                         confirmation_height: node_a_htlc_claimable,
 711                 }, htlc_balance_unknown_preimage.clone()]),
 712                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 713
 714         // Finally make the HTLC transactions have ANTI_REORG_DELAY blocks. This call previously
 715         // panicked as described in the test introduction. This will remove the "maybe claimable"
 716         // spendable output as nodes[1] has fully claimed the second HTLC.
 717         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
 718         expect_payment_failed!(nodes[0], payment_hash, false);
 719
 720         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 721                         amount_satoshis: 1_000_000 - 10_000 - 20_000 - chan_feerate *
 722                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 723                         confirmation_height: node_a_commitment_claimable,
 724                 }, Balance::ClaimableAwaitingConfirmations {
 725                         amount_satoshis: 10_000,
 726                         confirmation_height: node_a_htlc_claimable,
 727                 }]),
 728                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 729
 730         // Connect blocks until the commitment transaction's CSV expires, providing us the relevant
 731         // `SpendableOutputs` event and removing the claimable balance entry.
 732         connect_blocks(&nodes[0], node_a_commitment_claimable - nodes[0].best_block_info().1);
 733         assert_eq!(vec![Balance::ClaimableAwaitingConfirmations {
 734                         amount_satoshis: 10_000,
 735                         confirmation_height: node_a_htlc_claimable,
 736                 }],
 737                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 738         test_spendable_output(&nodes[0], &as_txn[0]);
 739
 740         // Connect blocks until the HTLC-Timeout's CSV expires, providing us the relevant
 741         // `SpendableOutputs` event and removing the claimable balance entry.
 742         connect_blocks(&nodes[0], node_a_htlc_claimable - nodes[0].best_block_info().1);
 743         assert!(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
 744         test_spendable_output(&nodes[0], &as_txn[1]);
 745
 746         // Ensure that even if we connect more blocks, potentially replaying the entire chain if we're
 747         // using `ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks`, we don't get new
 748         // monitor events or claimable balances.
 749         connect_blocks(&nodes[0], 6);
 750         connect_blocks(&nodes[0], 6);
 751         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 752         assert!(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
 753 }
 754
 755 #[test]
 756 fn test_no_preimage_inbound_htlc_balances() {
 757         // Tests that MaybePreimageClaimableHTLC are generated for inbound HTLCs for which we do not
 758         // have a preimage.
 759         let chanmon_cfgs = create_chanmon_cfgs(2);
 760         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 761         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 762         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 763
 764         let (_, _, chan_id, funding_tx) = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 500_000_000);
 765         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
 766
 767         // Send two HTLCs, one from A to B, and one from B to A.
 768         let to_b_failed_payment_hash = route_payment(&nodes[0], &[&nodes[1]], 10_000_000).1;
 769         let to_a_failed_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 20_000_000).1;
 770         let htlc_cltv_timeout = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
 771
 772         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
 773         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
 774
 775         let a_sent_htlc_balance = Balance::MaybeTimeoutClaimableHTLC {
 776                 amount_satoshis: 10_000,
 777                 claimable_height: htlc_cltv_timeout,
 778                 payment_hash: to_b_failed_payment_hash,
 779         };
 780         let a_received_htlc_balance = Balance::MaybePreimageClaimableHTLC {
 781                 amount_satoshis: 20_000,
 782                 expiry_height: htlc_cltv_timeout,
 783                 payment_hash: to_a_failed_payment_hash,
 784         };
 785         let b_received_htlc_balance = Balance::MaybePreimageClaimableHTLC {
 786                 amount_satoshis: 10_000,
 787                 expiry_height: htlc_cltv_timeout,
 788                 payment_hash: to_b_failed_payment_hash,
 789         };
 790         let b_sent_htlc_balance = Balance::MaybeTimeoutClaimableHTLC {
 791                 amount_satoshis: 20_000,
 792                 claimable_height: htlc_cltv_timeout,
 793                 payment_hash: to_a_failed_payment_hash,
 794         };
 795
 796         // Both A and B will have an HTLC that's claimable on timeout and one that's claimable if they
 797         // receive the preimage. These will remain the same through the channel closure and until the
 798         // HTLC output is spent.
 799
 800         assert_eq!(sorted_vec(vec![Balance::ClaimableOnChannelClose {
 801                         amount_satoshis: 1_000_000 - 500_000 - 10_000 - chan_feerate *
 802                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 803                 }, a_received_htlc_balance.clone(), a_sent_htlc_balance.clone()]),
 804                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 805
 806         assert_eq!(sorted_vec(vec![Balance::ClaimableOnChannelClose {
 807                         amount_satoshis: 500_000 - 20_000,
 808                 }, b_received_htlc_balance.clone(), b_sent_htlc_balance.clone()]),
 809                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 810
 811         // Get nodes[0]'s commitment transaction and HTLC-Timeout transaction
 812         let as_txn = get_local_commitment_txn!(nodes[0], chan_id);
 813         assert_eq!(as_txn.len(), 2);
 814         check_spends!(as_txn[1], as_txn[0]);
 815         check_spends!(as_txn[0], funding_tx);
 816
 817         // Now close the channel by confirming A's commitment transaction on both nodes, checking the
 818         // claimable balances remain the same except for the non-HTLC balance changing variant.
 819         let node_a_commitment_claimable = nodes[0].best_block_info().1 + BREAKDOWN_TIMEOUT as u32;
 820         let as_pre_spend_claims = sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 821                         amount_satoshis: 1_000_000 - 500_000 - 10_000 - chan_feerate *
 822                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 823                         confirmation_height: node_a_commitment_claimable,
 824                 }, a_received_htlc_balance.clone(), a_sent_htlc_balance.clone()]);
 825
 826         mine_transaction(&nodes[0], &as_txn[0]);
 827         nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
 828         check_added_monitors!(nodes[0], 1);
 829         check_closed_broadcast!(nodes[0], true);
 830         check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed, [nodes[1].node.get_our_node_id()], 1000000);
 831
 832         assert_eq!(as_pre_spend_claims,
 833                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 834
 835         mine_transaction(&nodes[1], &as_txn[0]);
 836         check_added_monitors!(nodes[1], 1);
 837         check_closed_broadcast!(nodes[1], true);
 838         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed, [nodes[0].node.get_our_node_id()], 1000000);
 839
 840         let node_b_commitment_claimable = nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1;
 841         let mut bs_pre_spend_claims = sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 842                         amount_satoshis: 500_000 - 20_000,
 843                         confirmation_height: node_b_commitment_claimable,
 844                 }, b_received_htlc_balance.clone(), b_sent_htlc_balance.clone()]);
 845         assert_eq!(bs_pre_spend_claims,
 846                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 847
 848         // We'll broadcast the HTLC-Timeout transaction one block prior to the htlc's expiration (as it
 849         // is confirmable in the next block), but will still include the same claimable balances as no
 850         // HTLC has been spent, even after the HTLC expires. We'll also fail the inbound HTLC, but it
 851         // won't do anything as the channel is already closed.
 852
 853         connect_blocks(&nodes[0], TEST_FINAL_CLTV);
 854         let as_htlc_timeout_claim = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 855         assert_eq!(as_htlc_timeout_claim.len(), 1);
 856         check_spends!(as_htlc_timeout_claim[0], as_txn[0]);
 857         expect_pending_htlcs_forwardable_conditions!(nodes[0],
 858                 [HTLCDestination::FailedPayment { payment_hash: to_a_failed_payment_hash }]);
 859
 860         assert_eq!(as_pre_spend_claims,
 861                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 862
 863         connect_blocks(&nodes[0], 1);
 864         assert_eq!(as_pre_spend_claims,
 865                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 866
 867         // For node B, we'll get the non-HTLC funds claimable after ANTI_REORG_DELAY confirmations
 868         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 869         test_spendable_output(&nodes[1], &as_txn[0]);
 870         bs_pre_spend_claims.retain(|e| if let Balance::ClaimableAwaitingConfirmations { .. } = e { false } else { true });
 871
 872         // The next few blocks for B look the same as for A, though for the opposite HTLC
 873         nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
 874         connect_blocks(&nodes[1], TEST_FINAL_CLTV - (ANTI_REORG_DELAY - 1));
 875         expect_pending_htlcs_forwardable_conditions!(nodes[1],
 876                 [HTLCDestination::FailedPayment { payment_hash: to_b_failed_payment_hash }]);
 877         let bs_htlc_timeout_claim = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 878         assert_eq!(bs_htlc_timeout_claim.len(), 1);
 879         check_spends!(bs_htlc_timeout_claim[0], as_txn[0]);
 880
 881         assert_eq!(bs_pre_spend_claims,
 882                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 883
 884         connect_blocks(&nodes[1], 1);
 885         assert_eq!(bs_pre_spend_claims,
 886                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 887
 888         // Now confirm the two HTLC timeout transactions for A, checking that the inbound HTLC resolves
 889         // after ANTI_REORG_DELAY confirmations and the other takes BREAKDOWN_TIMEOUT confirmations.
 890         mine_transaction(&nodes[0], &as_htlc_timeout_claim[0]);
 891         let as_timeout_claimable_height = nodes[0].best_block_info().1 + (BREAKDOWN_TIMEOUT as u32) - 1;
 892         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 893                         amount_satoshis: 1_000_000 - 500_000 - 10_000 - chan_feerate *
 894                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 895                         confirmation_height: node_a_commitment_claimable,
 896                 }, a_received_htlc_balance.clone(), Balance::ClaimableAwaitingConfirmations {
 897                         amount_satoshis: 10_000,
 898                         confirmation_height: as_timeout_claimable_height,
 899                 }]),
 900                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 901
 902         mine_transaction(&nodes[0], &bs_htlc_timeout_claim[0]);
 903         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 904                         amount_satoshis: 1_000_000 - 500_000 - 10_000 - chan_feerate *
 905                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 906                         confirmation_height: node_a_commitment_claimable,
 907                 }, a_received_htlc_balance.clone(), Balance::ClaimableAwaitingConfirmations {
 908                         amount_satoshis: 10_000,
 909                         confirmation_height: as_timeout_claimable_height,
 910                 }]),
 911                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 912
 913         // Once as_htlc_timeout_claim[0] reaches ANTI_REORG_DELAY confirmations, we should get a
 914         // payment failure event.
 915         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 2);
 916         expect_payment_failed!(nodes[0], to_b_failed_payment_hash, false);
 917
 918         connect_blocks(&nodes[0], 1);
 919         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 920                         amount_satoshis: 1_000_000 - 500_000 - 10_000 - chan_feerate *
 921                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 922                         confirmation_height: node_a_commitment_claimable,
 923                 }, Balance::ClaimableAwaitingConfirmations {
 924                         amount_satoshis: 10_000,
 925                         confirmation_height: core::cmp::max(as_timeout_claimable_height, htlc_cltv_timeout),
 926                 }]),
 927                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 928
 929         connect_blocks(&nodes[0], node_a_commitment_claimable - nodes[0].best_block_info().1);
 930         assert_eq!(vec![Balance::ClaimableAwaitingConfirmations {
 931                         amount_satoshis: 10_000,
 932                         confirmation_height: core::cmp::max(as_timeout_claimable_height, htlc_cltv_timeout),
 933                 }],
 934                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 935         test_spendable_output(&nodes[0], &as_txn[0]);
 936
 937         connect_blocks(&nodes[0], as_timeout_claimable_height - nodes[0].best_block_info().1);
 938         assert!(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
 939         test_spendable_output(&nodes[0], &as_htlc_timeout_claim[0]);
 940
 941         // The process for B should be completely identical as well, noting that the non-HTLC-balance
 942         // was already claimed.
 943         mine_transaction(&nodes[1], &bs_htlc_timeout_claim[0]);
 944         let bs_timeout_claimable_height = nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1;
 945         assert_eq!(sorted_vec(vec![b_received_htlc_balance.clone(), Balance::ClaimableAwaitingConfirmations {
 946                         amount_satoshis: 20_000,
 947                         confirmation_height: bs_timeout_claimable_height,
 948                 }]),
 949                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 950
 951         mine_transaction(&nodes[1], &as_htlc_timeout_claim[0]);
 952         assert_eq!(sorted_vec(vec![b_received_htlc_balance.clone(), Balance::ClaimableAwaitingConfirmations {
 953                         amount_satoshis: 20_000,
 954                         confirmation_height: bs_timeout_claimable_height,
 955                 }]),
 956                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 957
 958         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
 959         expect_payment_failed!(nodes[1], to_a_failed_payment_hash, false);
 960
 961         assert_eq!(vec![b_received_htlc_balance.clone()],
 962                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 963         test_spendable_output(&nodes[1], &bs_htlc_timeout_claim[0]);
 964
 965         connect_blocks(&nodes[1], 1);
 966         assert!(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
 967
 968         // Ensure that even if we connect more blocks, potentially replaying the entire chain if we're
 969         // using `ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks`, we don't get new
 970         // monitor events or claimable balances.
 971         connect_blocks(&nodes[1], 6);
 972         connect_blocks(&nodes[1], 6);
 973         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 974         assert!(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
 975 }
 976
 977 fn sorted_vec_with_additions<T: Ord + Clone>(v_orig: &Vec<T>, extra_ts: &[&T]) -> Vec<T> {
 978         let mut v = v_orig.clone();
 979         for t in extra_ts {
 980                 v.push((*t).clone());
 981         }
 982         v.sort_unstable();
 983         v
 984 }
 985
 986 fn do_test_revoked_counterparty_commitment_balances(confirm_htlc_spend_first: bool) {
 987         // Tests `get_claimable_balances` for revoked counterparty commitment transactions.
 988         let mut chanmon_cfgs = create_chanmon_cfgs(2);
 989         // We broadcast a second-to-latest commitment transaction, without providing the revocation
 990         // secret to the counterparty. However, because we always immediately take the revocation
 991         // secret from the keys_manager, we would panic at broadcast as we're trying to sign a
 992         // transaction which, from the point of view of our keys_manager, is revoked.
 993         chanmon_cfgs[1].keys_manager.disable_revocation_policy_check = true;
 994         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 995         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 996         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 997
 998         let (_, _, chan_id, funding_tx) =
 999                 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 100_000_000);
1000         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
1001         assert_eq!(funding_outpoint.to_channel_id(), chan_id);
1002
1003         // We create five HTLCs for B to claim against A's revoked commitment transaction:
1004         //
1005         // (1) one for which A is the originator and B knows the preimage
1006         // (2) one for which B is the originator where the HTLC has since timed-out
1007         // (3) one for which B is the originator but where the HTLC has not yet timed-out
1008         // (4) one dust HTLC which is lost in the channel closure
1009         // (5) one that actually isn't in the revoked commitment transaction at all, but was added in
1010         //     later commitment transaction updates
1011         //
1012         // Though they could all be claimed in a single claim transaction, due to CLTV timeouts they
1013         // are all currently claimed in separate transactions, which helps us test as we can claim
1014         // HTLCs individually.
1015
1016         let (claimed_payment_preimage, claimed_payment_hash, ..) = route_payment(&nodes[0], &[&nodes[1]], 3_000_000);
1017         let timeout_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 4_000_000).1;
1018         let dust_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 3_000).1;
1019
1020         let htlc_cltv_timeout = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
1021
1022         connect_blocks(&nodes[0], 10);
1023         connect_blocks(&nodes[1], 10);
1024
1025         let live_htlc_cltv_timeout = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
1026         let live_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 5_000_000).1;
1027
1028         // Get the latest commitment transaction from A and then update the fee to revoke it
1029         let as_revoked_txn = get_local_commitment_txn!(nodes[0], chan_id);
1030         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
1031
1032         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
1033
1034         let missing_htlc_cltv_timeout = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
1035         let missing_htlc_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 2_000_000).1;
1036
1037         nodes[1].node.claim_funds(claimed_payment_preimage);
1038         expect_payment_claimed!(nodes[1], claimed_payment_hash, 3_000_000);
1039         check_added_monitors!(nodes[1], 1);
1040         let _b_htlc_msgs = get_htlc_update_msgs!(&nodes[1], nodes[0].node.get_our_node_id());
1041
1042         connect_blocks(&nodes[0], htlc_cltv_timeout + 1 - 10);
1043         check_closed_broadcast!(nodes[0], true);
1044         check_added_monitors!(nodes[0], 1);
1045
1046         let mut events = nodes[0].node.get_and_clear_pending_events();
1047         assert_eq!(events.len(), 6);
1048         let mut failed_payments: HashSet<_> =
1049                 [timeout_payment_hash, dust_payment_hash, live_payment_hash, missing_htlc_payment_hash]
1050                 .iter().map(|a| *a).collect();
1051         events.retain(|ev| {
1052                 match ev {
1053                         Event::HTLCHandlingFailed { failed_next_destination: HTLCDestination::NextHopChannel { node_id, channel_id }, .. } => {
1054                                 assert_eq!(*channel_id, chan_id);
1055                                 assert_eq!(*node_id, Some(nodes[1].node.get_our_node_id()));
1056                                 false
1057                         },
1058                         Event::HTLCHandlingFailed { failed_next_destination: HTLCDestination::FailedPayment { payment_hash }, .. } => {
1059                                 assert!(failed_payments.remove(payment_hash));
1060                                 false
1061                         },
1062                         _ => true,
1063                 }
1064         });
1065         assert!(failed_payments.is_empty());
1066         if let Event::PendingHTLCsForwardable { .. } = events[0] {} else { panic!(); }
1067         match &events[1] {
1068                 Event::ChannelClosed { reason: ClosureReason::HolderForceClosed, .. } => {},
1069                 _ => panic!(),
1070         }
1071
1072         connect_blocks(&nodes[1], htlc_cltv_timeout + 1 - 10);
1073         check_closed_broadcast!(nodes[1], true);
1074         check_added_monitors!(nodes[1], 1);
1075         check_closed_event!(nodes[1], 1, ClosureReason::HolderForceClosed, [nodes[0].node.get_our_node_id()], 1000000);
1076
1077         // Prior to channel closure, B considers the preimage HTLC as its own, and otherwise only
1078         // lists the two on-chain timeout-able HTLCs as claimable balances.
1079         assert_eq!(sorted_vec(vec![Balance::ClaimableOnChannelClose {
1080                         amount_satoshis: 100_000 - 5_000 - 4_000 - 3 - 2_000 + 3_000,
1081                 }, Balance::MaybeTimeoutClaimableHTLC {
1082                         amount_satoshis: 2_000,
1083                         claimable_height: missing_htlc_cltv_timeout,
1084                         payment_hash: missing_htlc_payment_hash,
1085                 }, Balance::MaybeTimeoutClaimableHTLC {
1086                         amount_satoshis: 4_000,
1087                         claimable_height: htlc_cltv_timeout,
1088                         payment_hash: timeout_payment_hash,
1089                 }, Balance::MaybeTimeoutClaimableHTLC {
1090                         amount_satoshis: 5_000,
1091                         claimable_height: live_htlc_cltv_timeout,
1092                         payment_hash: live_payment_hash,
1093                 }]),
1094                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1095
1096         mine_transaction(&nodes[1], &as_revoked_txn[0]);
1097         let mut claim_txn: Vec<_> = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().drain(..).filter(|tx| tx.input.iter().any(|inp| inp.previous_output.txid == as_revoked_txn[0].txid())).collect();
1098         // Currently the revoked commitment is claimed in four transactions as the HTLCs all expire
1099         // quite soon.
1100         assert_eq!(claim_txn.len(), 4);
1101         claim_txn.sort_unstable_by_key(|tx| tx.output.iter().map(|output| output.value).sum::<u64>());
1102
1103         // The following constants were determined experimentally
1104         const BS_TO_SELF_CLAIM_EXP_WEIGHT: usize = 483;
1105         const OUTBOUND_HTLC_CLAIM_EXP_WEIGHT: usize = 571;
1106         const INBOUND_HTLC_CLAIM_EXP_WEIGHT: usize = 578;
1107
1108         // Check that the weight is close to the expected weight. Note that signature sizes vary
1109         // somewhat so it may not always be exact.
1110         fuzzy_assert_eq(claim_txn[0].weight(), OUTBOUND_HTLC_CLAIM_EXP_WEIGHT);
1111         fuzzy_assert_eq(claim_txn[1].weight(), INBOUND_HTLC_CLAIM_EXP_WEIGHT);
1112         fuzzy_assert_eq(claim_txn[2].weight(), INBOUND_HTLC_CLAIM_EXP_WEIGHT);
1113         fuzzy_assert_eq(claim_txn[3].weight(), BS_TO_SELF_CLAIM_EXP_WEIGHT);
1114
1115         // The expected balance for the next three checks, with the largest-HTLC and to_self output
1116         // claim balances separated out.
1117         let expected_balance = vec![Balance::ClaimableAwaitingConfirmations {
1118                         // to_remote output in A's revoked commitment
1119                         amount_satoshis: 100_000 - 5_000 - 4_000 - 3,
1120                         confirmation_height: nodes[1].best_block_info().1 + 5,
1121                 }, Balance::CounterpartyRevokedOutputClaimable {
1122                         amount_satoshis: 3_000,
1123                 }, Balance::CounterpartyRevokedOutputClaimable {
1124                         amount_satoshis: 4_000,
1125                 }];
1126
1127         let to_self_unclaimed_balance = Balance::CounterpartyRevokedOutputClaimable {
1128                 amount_satoshis: 1_000_000 - 100_000 - 3_000 - chan_feerate *
1129                         (channel::commitment_tx_base_weight(&channel_type_features) + 3 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1130         };
1131         let to_self_claimed_avail_height;
1132         let largest_htlc_unclaimed_balance = Balance::CounterpartyRevokedOutputClaimable {
1133                 amount_satoshis: 5_000,
1134         };
1135         let largest_htlc_claimed_avail_height;
1136
1137         // Once the channel has been closed by A, B now considers all of the commitment transactions'
1138         // outputs as `CounterpartyRevokedOutputClaimable`.
1139         assert_eq!(sorted_vec_with_additions(&expected_balance, &[&to_self_unclaimed_balance, &largest_htlc_unclaimed_balance]),
1140                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1141
1142         if confirm_htlc_spend_first {
1143                 mine_transaction(&nodes[1], &claim_txn[2]);
1144                 largest_htlc_claimed_avail_height = nodes[1].best_block_info().1 + 5;
1145                 to_self_claimed_avail_height = nodes[1].best_block_info().1 + 6; // will be claimed in the next block
1146         } else {
1147                 // Connect the to_self output claim, taking all of A's non-HTLC funds
1148                 mine_transaction(&nodes[1], &claim_txn[3]);
1149                 to_self_claimed_avail_height = nodes[1].best_block_info().1 + 5;
1150                 largest_htlc_claimed_avail_height = nodes[1].best_block_info().1 + 6; // will be claimed in the next block
1151         }
1152
1153         let largest_htlc_claimed_balance = Balance::ClaimableAwaitingConfirmations {
1154                 amount_satoshis: 5_000 - chan_feerate * INBOUND_HTLC_CLAIM_EXP_WEIGHT as u64 / 1000,
1155                 confirmation_height: largest_htlc_claimed_avail_height,
1156         };
1157         let to_self_claimed_balance = Balance::ClaimableAwaitingConfirmations {
1158                 amount_satoshis: 1_000_000 - 100_000 - 3_000 - chan_feerate *
1159                         (channel::commitment_tx_base_weight(&channel_type_features) + 3 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000
1160                         - chan_feerate * claim_txn[3].weight() as u64 / 1000,
1161                 confirmation_height: to_self_claimed_avail_height,
1162         };
1163
1164         if confirm_htlc_spend_first {
1165                 assert_eq!(sorted_vec_with_additions(&expected_balance, &[&to_self_unclaimed_balance, &largest_htlc_claimed_balance]),
1166                         sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1167         } else {
1168                 assert_eq!(sorted_vec_with_additions(&expected_balance, &[&to_self_claimed_balance, &largest_htlc_unclaimed_balance]),
1169                         sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1170         }
1171
1172         if confirm_htlc_spend_first {
1173                 mine_transaction(&nodes[1], &claim_txn[3]);
1174         } else {
1175                 mine_transaction(&nodes[1], &claim_txn[2]);
1176         }
1177         assert_eq!(sorted_vec_with_additions(&expected_balance, &[&to_self_claimed_balance, &largest_htlc_claimed_balance]),
1178                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1179
1180         // Finally, connect the last two remaining HTLC spends and check that they move to
1181         // `ClaimableAwaitingConfirmations`
1182         mine_transaction(&nodes[1], &claim_txn[0]);
1183         mine_transaction(&nodes[1], &claim_txn[1]);
1184
1185         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
1186                         // to_remote output in A's revoked commitment
1187                         amount_satoshis: 100_000 - 5_000 - 4_000 - 3,
1188                         confirmation_height: nodes[1].best_block_info().1 + 1,
1189                 }, Balance::ClaimableAwaitingConfirmations {
1190                         amount_satoshis: 1_000_000 - 100_000 - 3_000 - chan_feerate *
1191                                 (channel::commitment_tx_base_weight(&channel_type_features) + 3 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000
1192                                 - chan_feerate * claim_txn[3].weight() as u64 / 1000,
1193                         confirmation_height: to_self_claimed_avail_height,
1194                 }, Balance::ClaimableAwaitingConfirmations {
1195                         amount_satoshis: 3_000 - chan_feerate * OUTBOUND_HTLC_CLAIM_EXP_WEIGHT as u64 / 1000,
1196                         confirmation_height: nodes[1].best_block_info().1 + 4,
1197                 }, Balance::ClaimableAwaitingConfirmations {
1198                         amount_satoshis: 4_000 - chan_feerate * INBOUND_HTLC_CLAIM_EXP_WEIGHT as u64 / 1000,
1199                         confirmation_height: nodes[1].best_block_info().1 + 5,
1200                 }, Balance::ClaimableAwaitingConfirmations {
1201                         amount_satoshis: 5_000 - chan_feerate * INBOUND_HTLC_CLAIM_EXP_WEIGHT as u64 / 1000,
1202                         confirmation_height: largest_htlc_claimed_avail_height,
1203                 }]),
1204                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1205
1206         connect_blocks(&nodes[1], 1);
1207         test_spendable_output(&nodes[1], &as_revoked_txn[0]);
1208
1209         let mut payment_failed_events = nodes[1].node.get_and_clear_pending_events();
1210         expect_payment_failed_conditions_event(payment_failed_events[..2].to_vec(),
1211                 missing_htlc_payment_hash, false, PaymentFailedConditions::new());
1212         expect_payment_failed_conditions_event(payment_failed_events[2..].to_vec(),
1213                 dust_payment_hash, false, PaymentFailedConditions::new());
1214
1215         connect_blocks(&nodes[1], 1);
1216         test_spendable_output(&nodes[1], &claim_txn[if confirm_htlc_spend_first { 2 } else { 3 }]);
1217         connect_blocks(&nodes[1], 1);
1218         test_spendable_output(&nodes[1], &claim_txn[if confirm_htlc_spend_first { 3 } else { 2 }]);
1219         expect_payment_failed!(nodes[1], live_payment_hash, false);
1220         connect_blocks(&nodes[1], 1);
1221         test_spendable_output(&nodes[1], &claim_txn[0]);
1222         connect_blocks(&nodes[1], 1);
1223         test_spendable_output(&nodes[1], &claim_txn[1]);
1224         expect_payment_failed!(nodes[1], timeout_payment_hash, false);
1225         assert_eq!(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances(), Vec::new());
1226
1227         // Ensure that even if we connect more blocks, potentially replaying the entire chain if we're
1228         // using `ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks`, we don't get new
1229         // monitor events or claimable balances.
1230         connect_blocks(&nodes[1], 6);
1231         connect_blocks(&nodes[1], 6);
1232         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
1233         assert!(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
1234 }
1235
1236 #[test]
1237 fn test_revoked_counterparty_commitment_balances() {
1238         do_test_revoked_counterparty_commitment_balances(true);
1239         do_test_revoked_counterparty_commitment_balances(false);
1240 }
1241
1242 #[test]
1243 fn test_revoked_counterparty_htlc_tx_balances() {
1244         // Tests `get_claimable_balances` for revocation spends of HTLC transactions.
1245         let mut chanmon_cfgs = create_chanmon_cfgs(2);
1246         chanmon_cfgs[1].keys_manager.disable_revocation_policy_check = true;
1247         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1248         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
1249         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1250
1251         // Create some initial channels
1252         let (_, _, chan_id, funding_tx) =
1253                 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 11_000_000);
1254         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
1255         assert_eq!(funding_outpoint.to_channel_id(), chan_id);
1256
1257         let payment_preimage = route_payment(&nodes[0], &[&nodes[1]], 3_000_000).0;
1258         let failed_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 1_000_000).1;
1259         let revoked_local_txn = get_local_commitment_txn!(nodes[1], chan_id);
1260         assert_eq!(revoked_local_txn[0].input.len(), 1);
1261         assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, funding_tx.txid());
1262
1263         // The to-be-revoked commitment tx should have two HTLCs and an output for both sides
1264         assert_eq!(revoked_local_txn[0].output.len(), 4);
1265
1266         claim_payment(&nodes[0], &[&nodes[1]], payment_preimage);
1267
1268         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
1269         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
1270
1271         // B will generate an HTLC-Success from its revoked commitment tx
1272         mine_transaction(&nodes[1], &revoked_local_txn[0]);
1273         check_closed_broadcast!(nodes[1], true);
1274         check_added_monitors!(nodes[1], 1);
1275         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed, [nodes[0].node.get_our_node_id()], 1000000);
1276         let revoked_htlc_success = {
1277                 let mut txn = nodes[1].tx_broadcaster.txn_broadcast();
1278                 assert_eq!(txn.len(), 1);
1279                 assert_eq!(txn[0].input.len(), 1);
1280                 assert_eq!(txn[0].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
1281                 check_spends!(txn[0], revoked_local_txn[0]);
1282                 txn.pop().unwrap()
1283         };
1284
1285         connect_blocks(&nodes[1], TEST_FINAL_CLTV);
1286         let revoked_htlc_timeout = {
1287                 let mut txn = nodes[1].tx_broadcaster.unique_txn_broadcast();
1288                 assert_eq!(txn.len(), 2);
1289                 if txn[0].input[0].previous_output == revoked_htlc_success.input[0].previous_output {
1290                         txn.remove(1)
1291                 } else {
1292                         txn.remove(0)
1293                 }
1294         };
1295         check_spends!(revoked_htlc_timeout, revoked_local_txn[0]);
1296         assert_ne!(revoked_htlc_success.input[0].previous_output, revoked_htlc_timeout.input[0].previous_output);
1297         assert_eq!(revoked_htlc_success.lock_time.0, 0);
1298         assert_ne!(revoked_htlc_timeout.lock_time.0, 0);
1299
1300         // A will generate justice tx from B's revoked commitment/HTLC tx
1301         mine_transaction(&nodes[0], &revoked_local_txn[0]);
1302         check_closed_broadcast!(nodes[0], true);
1303         check_added_monitors!(nodes[0], 1);
1304         check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed, [nodes[1].node.get_our_node_id()], 1000000);
1305         let to_remote_conf_height = nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1;
1306
1307         let as_commitment_claim_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
1308         assert_eq!(as_commitment_claim_txn.len(), 1);
1309         check_spends!(as_commitment_claim_txn[0], revoked_local_txn[0]);
1310
1311         // The next two checks have the same balance set for A - even though we confirm a revoked HTLC
1312         // transaction our balance tracking doesn't use the on-chain value so the
1313         // `CounterpartyRevokedOutputClaimable` entry doesn't change.
1314         let as_balances = sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
1315                         // to_remote output in B's revoked commitment
1316                         amount_satoshis: 1_000_000 - 11_000 - 3_000 - chan_feerate *
1317                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1318                         confirmation_height: to_remote_conf_height,
1319                 }, Balance::CounterpartyRevokedOutputClaimable {
1320                         // to_self output in B's revoked commitment
1321                         amount_satoshis: 10_000,
1322                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 1
1323                         amount_satoshis: 3_000,
1324                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1325                         amount_satoshis: 1_000,
1326                 }]);
1327         assert_eq!(as_balances,
1328                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1329
1330         mine_transaction(&nodes[0], &revoked_htlc_success);
1331         let as_htlc_claim_tx = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
1332         assert_eq!(as_htlc_claim_tx.len(), 2);
1333         check_spends!(as_htlc_claim_tx[0], revoked_htlc_success);
1334         check_spends!(as_htlc_claim_tx[1], revoked_local_txn[0]); // A has to generate a new claim for the remaining revoked
1335                                                                   // outputs (which no longer includes the spent HTLC output)
1336
1337         assert_eq!(as_balances,
1338                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1339
1340         assert_eq!(as_htlc_claim_tx[0].output.len(), 1);
1341         fuzzy_assert_eq(as_htlc_claim_tx[0].output[0].value,
1342                 3_000 - chan_feerate * (revoked_htlc_success.weight() + as_htlc_claim_tx[0].weight()) as u64 / 1000);
1343
1344         mine_transaction(&nodes[0], &as_htlc_claim_tx[0]);
1345         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
1346                         // to_remote output in B's revoked commitment
1347                         amount_satoshis: 1_000_000 - 11_000 - 3_000 - chan_feerate *
1348                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1349                         confirmation_height: to_remote_conf_height,
1350                 }, Balance::CounterpartyRevokedOutputClaimable {
1351                         // to_self output in B's revoked commitment
1352                         amount_satoshis: 10_000,
1353                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1354                         amount_satoshis: 1_000,
1355                 }, Balance::ClaimableAwaitingConfirmations {
1356                         amount_satoshis: as_htlc_claim_tx[0].output[0].value,
1357                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1,
1358                 }]),
1359                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1360
1361         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 3);
1362         test_spendable_output(&nodes[0], &revoked_local_txn[0]);
1363         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1364                         // to_self output to B
1365                         amount_satoshis: 10_000,
1366                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1367                         amount_satoshis: 1_000,
1368                 }, Balance::ClaimableAwaitingConfirmations {
1369                         amount_satoshis: as_htlc_claim_tx[0].output[0].value,
1370                         confirmation_height: nodes[0].best_block_info().1 + 2,
1371                 }]),
1372                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1373
1374         connect_blocks(&nodes[0], 2);
1375         test_spendable_output(&nodes[0], &as_htlc_claim_tx[0]);
1376         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1377                         // to_self output in B's revoked commitment
1378                         amount_satoshis: 10_000,
1379                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1380                         amount_satoshis: 1_000,
1381                 }]),
1382                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1383
1384         connect_blocks(&nodes[0], revoked_htlc_timeout.lock_time.0 - nodes[0].best_block_info().1);
1385         expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore!(&nodes[0],
1386                 [HTLCDestination::FailedPayment { payment_hash: failed_payment_hash }]);
1387         // As time goes on A may split its revocation claim transaction into multiple.
1388         let as_fewer_input_rbf = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
1389         for tx in as_fewer_input_rbf.iter() {
1390                 check_spends!(tx, revoked_local_txn[0]);
1391         }
1392
1393         // Connect a number of additional blocks to ensure we don't forget the HTLC output needs
1394         // claiming.
1395         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
1396         let as_fewer_input_rbf = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
1397         for tx in as_fewer_input_rbf.iter() {
1398                 check_spends!(tx, revoked_local_txn[0]);
1399         }
1400
1401         mine_transaction(&nodes[0], &revoked_htlc_timeout);
1402         let as_second_htlc_claim_tx = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
1403         assert_eq!(as_second_htlc_claim_tx.len(), 2);
1404
1405         check_spends!(as_second_htlc_claim_tx[0], revoked_htlc_timeout);
1406         check_spends!(as_second_htlc_claim_tx[1], revoked_local_txn[0]);
1407
1408         // Connect blocks to finalize the HTLC resolution with the HTLC-Timeout transaction. In a
1409         // previous iteration of the revoked balance handling this would result in us "forgetting" that
1410         // the revoked HTLC output still needed to be claimed.
1411         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
1412         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1413                         // to_self output in B's revoked commitment
1414                         amount_satoshis: 10_000,
1415                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1416                         amount_satoshis: 1_000,
1417                 }]),
1418                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1419
1420         mine_transaction(&nodes[0], &as_second_htlc_claim_tx[0]);
1421         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1422                         // to_self output in B's revoked commitment
1423                         amount_satoshis: 10_000,
1424                 }, Balance::ClaimableAwaitingConfirmations {
1425                         amount_satoshis: as_second_htlc_claim_tx[0].output[0].value,
1426                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1,
1427                 }]),
1428                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1429
1430         mine_transaction(&nodes[0], &as_second_htlc_claim_tx[1]);
1431         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
1432                         // to_self output in B's revoked commitment
1433                         amount_satoshis: as_second_htlc_claim_tx[1].output[0].value,
1434                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1,
1435                 }, Balance::ClaimableAwaitingConfirmations {
1436                         amount_satoshis: as_second_htlc_claim_tx[0].output[0].value,
1437                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 2,
1438                 }]),
1439                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1440
1441         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 2);
1442         test_spendable_output(&nodes[0], &as_second_htlc_claim_tx[0]);
1443         connect_blocks(&nodes[0], 1);
1444         test_spendable_output(&nodes[0], &as_second_htlc_claim_tx[1]);
1445
1446         assert_eq!(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances(), Vec::new());
1447
1448         // Ensure that even if we connect more blocks, potentially replaying the entire chain if we're
1449         // using `ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks`, we don't get new
1450         // monitor events or claimable balances.
1451         connect_blocks(&nodes[0], 6);
1452         connect_blocks(&nodes[0], 6);
1453         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
1454         assert!(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
1455 }
1456
1457 #[test]
1458 fn test_revoked_counterparty_aggregated_claims() {
1459         // Tests `get_claimable_balances` for revoked counterparty commitment transactions when
1460         // claiming with an aggregated claim transaction.
1461         let mut chanmon_cfgs = create_chanmon_cfgs(2);
1462         // We broadcast a second-to-latest commitment transaction, without providing the revocation
1463         // secret to the counterparty. However, because we always immediately take the revocation
1464         // secret from the keys_manager, we would panic at broadcast as we're trying to sign a
1465         // transaction which, from the point of view of our keys_manager, is revoked.
1466         chanmon_cfgs[1].keys_manager.disable_revocation_policy_check = true;
1467         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1468         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
1469         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1470
1471         let (_, _, chan_id, funding_tx) =
1472                 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 100_000_000);
1473         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
1474         assert_eq!(funding_outpoint.to_channel_id(), chan_id);
1475
1476         // We create two HTLCs, one which we will give A the preimage to to generate an HTLC-Success
1477         // transaction, and one which we will not, allowing B to claim the HTLC output in an aggregated
1478         // revocation-claim transaction.
1479
1480         let (claimed_payment_preimage, claimed_payment_hash, ..) = route_payment(&nodes[1], &[&nodes[0]], 3_000_000);
1481         let revoked_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 4_000_000).1;
1482
1483         let htlc_cltv_timeout = nodes[1].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
1484
1485         // Cheat by giving A's ChannelMonitor the preimage to the to-be-claimed HTLC so that we have an
1486         // HTLC-claim transaction on the to-be-revoked state.
1487         get_monitor!(nodes[0], chan_id).provide_payment_preimage(&claimed_payment_hash, &claimed_payment_preimage,
1488                 &node_cfgs[0].tx_broadcaster, &LowerBoundedFeeEstimator::new(node_cfgs[0].fee_estimator), &nodes[0].logger);
1489
1490         // Now get the latest commitment transaction from A and then update the fee to revoke it
1491         let as_revoked_txn = get_local_commitment_txn!(nodes[0], chan_id);
1492
1493         assert_eq!(as_revoked_txn.len(), 2);
1494         check_spends!(as_revoked_txn[0], funding_tx);
1495         check_spends!(as_revoked_txn[1], as_revoked_txn[0]); // The HTLC-Claim transaction
1496
1497         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
1498         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
1499
1500         {
1501                 let mut feerate = chanmon_cfgs[0].fee_estimator.sat_per_kw.lock().unwrap();
1502                 *feerate += 1;
1503         }
1504         nodes[0].node.timer_tick_occurred();
1505         check_added_monitors!(nodes[0], 1);
1506
1507         let fee_update = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
1508         nodes[1].node.handle_update_fee(&nodes[0].node.get_our_node_id(), &fee_update.update_fee.unwrap());
1509         commitment_signed_dance!(nodes[1], nodes[0], fee_update.commitment_signed, false);
1510
1511         nodes[0].node.claim_funds(claimed_payment_preimage);
1512         expect_payment_claimed!(nodes[0], claimed_payment_hash, 3_000_000);
1513         check_added_monitors!(nodes[0], 1);
1514         let _a_htlc_msgs = get_htlc_update_msgs!(&nodes[0], nodes[1].node.get_our_node_id());
1515
1516         assert_eq!(sorted_vec(vec![Balance::ClaimableOnChannelClose {
1517                         amount_satoshis: 100_000 - 4_000 - 3_000,
1518                 }, Balance::MaybeTimeoutClaimableHTLC {
1519                         amount_satoshis: 4_000,
1520                         claimable_height: htlc_cltv_timeout,
1521                         payment_hash: revoked_payment_hash,
1522                 }, Balance::MaybeTimeoutClaimableHTLC {
1523                         amount_satoshis: 3_000,
1524                         claimable_height: htlc_cltv_timeout,
1525                         payment_hash: claimed_payment_hash,
1526                 }]),
1527                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1528
1529         mine_transaction(&nodes[1], &as_revoked_txn[0]);
1530         check_closed_broadcast!(nodes[1], true);
1531         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed, [nodes[0].node.get_our_node_id()], 1000000);
1532         check_added_monitors!(nodes[1], 1);
1533
1534         let mut claim_txn: Vec<_> = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().drain(..).filter(|tx| tx.input.iter().any(|inp| inp.previous_output.txid == as_revoked_txn[0].txid())).collect();
1535         // Currently the revoked commitment outputs are all claimed in one aggregated transaction
1536         assert_eq!(claim_txn.len(), 1);
1537         assert_eq!(claim_txn[0].input.len(), 3);
1538         check_spends!(claim_txn[0], as_revoked_txn[0]);
1539
1540         let to_remote_maturity = nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1;
1541
1542         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
1543                         // to_remote output in A's revoked commitment
1544                         amount_satoshis: 100_000 - 4_000 - 3_000,
1545                         confirmation_height: to_remote_maturity,
1546                 }, Balance::CounterpartyRevokedOutputClaimable {
1547                         // to_self output in A's revoked commitment
1548                         amount_satoshis: 1_000_000 - 100_000 - chan_feerate *
1549                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1550                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 1
1551                         amount_satoshis: 4_000,
1552                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1553                         amount_satoshis: 3_000,
1554                 }]),
1555                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1556
1557         // Confirm A's HTLC-Success tranasction which presumably raced B's claim, causing B to create a
1558         // new claim.
1559         mine_transaction(&nodes[1], &as_revoked_txn[1]);
1560         expect_payment_sent(&nodes[1], claimed_payment_preimage, None, true, false);
1561         let mut claim_txn_2: Vec<_> = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clone();
1562         claim_txn_2.sort_unstable_by_key(|tx| if tx.input.iter().any(|inp| inp.previous_output.txid == as_revoked_txn[0].txid()) { 0 } else { 1 });
1563         // Once B sees the HTLC-Success transaction it splits its claim transaction into two, though in
1564         // theory it could re-aggregate the claims as well.
1565         assert_eq!(claim_txn_2.len(), 2);
1566         assert_eq!(claim_txn_2[0].input.len(), 2);
1567         check_spends!(claim_txn_2[0], as_revoked_txn[0]);
1568         assert_eq!(claim_txn_2[1].input.len(), 1);
1569         check_spends!(claim_txn_2[1], as_revoked_txn[1]);
1570
1571         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
1572                         // to_remote output in A's revoked commitment
1573                         amount_satoshis: 100_000 - 4_000 - 3_000,
1574                         confirmation_height: to_remote_maturity,
1575                 }, Balance::CounterpartyRevokedOutputClaimable {
1576                         // to_self output in A's revoked commitment
1577                         amount_satoshis: 1_000_000 - 100_000 - chan_feerate *
1578                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1579                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 1
1580                         amount_satoshis: 4_000,
1581                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1582                         // The amount here is a bit of a misnomer, really its been reduced by the HTLC
1583                         // transaction fee, but the claimable amount is always a bit of an overshoot for HTLCs
1584                         // anyway, so its not a big change.
1585                         amount_satoshis: 3_000,
1586                 }]),
1587                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1588
1589         connect_blocks(&nodes[1], 5);
1590         test_spendable_output(&nodes[1], &as_revoked_txn[0]);
1591
1592         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1593                         // to_self output in A's revoked commitment
1594                         amount_satoshis: 1_000_000 - 100_000 - chan_feerate *
1595                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1596                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 1
1597                         amount_satoshis: 4_000,
1598                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1599                         // The amount here is a bit of a misnomer, really its been reduced by the HTLC
1600                         // transaction fee, but the claimable amount is always a bit of an overshoot for HTLCs
1601                         // anyway, so its not a big change.
1602                         amount_satoshis: 3_000,
1603                 }]),
1604                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1605
1606         mine_transaction(&nodes[1], &claim_txn_2[1]);
1607         let htlc_2_claim_maturity = nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1;
1608
1609         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1610                         // to_self output in A's revoked commitment
1611                         amount_satoshis: 1_000_000 - 100_000 - chan_feerate *
1612                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1613                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 1
1614                         amount_satoshis: 4_000,
1615                 }, Balance::ClaimableAwaitingConfirmations { // HTLC 2
1616                         amount_satoshis: claim_txn_2[1].output[0].value,
1617                         confirmation_height: htlc_2_claim_maturity,
1618                 }]),
1619                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1620
1621         connect_blocks(&nodes[1], 5);
1622         test_spendable_output(&nodes[1], &claim_txn_2[1]);
1623
1624         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1625                         // to_self output in A's revoked commitment
1626                         amount_satoshis: 1_000_000 - 100_000 - chan_feerate *
1627                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1628                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 1
1629                         amount_satoshis: 4_000,
1630                 }]),
1631                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1632
1633         mine_transaction(&nodes[1], &claim_txn_2[0]);
1634         let rest_claim_maturity = nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1;
1635
1636         assert_eq!(vec![Balance::ClaimableAwaitingConfirmations {
1637                         amount_satoshis: claim_txn_2[0].output[0].value,
1638                         confirmation_height: rest_claim_maturity,
1639                 }],
1640                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
1641
1642         assert!(nodes[1].node.get_and_clear_pending_events().is_empty()); // We shouldn't fail the payment until we spend the output
1643
1644         connect_blocks(&nodes[1], 5);
1645         expect_payment_failed!(nodes[1], revoked_payment_hash, false);
1646         test_spendable_output(&nodes[1], &claim_txn_2[0]);
1647         assert!(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
1648
1649         // Ensure that even if we connect more blocks, potentially replaying the entire chain if we're
1650         // using `ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks`, we don't get new
1651         // monitor events or claimable balances.
1652         connect_blocks(&nodes[1], 6);
1653         connect_blocks(&nodes[1], 6);
1654         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
1655         assert!(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
1656 }
1657
1658 fn do_test_restored_packages_retry(check_old_monitor_retries_after_upgrade: bool) {
1659         // Tests that we'll retry packages that were previously timelocked after we've restored them.
1660         let chanmon_cfgs = create_chanmon_cfgs(2);
1661         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1662         let persister;
1663         let new_chain_monitor;
1664
1665         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
1666         let node_deserialized;
1667
1668         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1669
1670         // Open a channel, lock in an HTLC, and immediately broadcast the commitment transaction. This
1671         // ensures that the HTLC timeout package is held until we reach its expiration height.
1672         let (_, _, chan_id, funding_tx) = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100_000, 50_000_000);
1673         route_payment(&nodes[0], &[&nodes[1]], 10_000_000);
1674
1675         nodes[0].node.force_close_broadcasting_latest_txn(&chan_id, &nodes[1].node.get_our_node_id()).unwrap();
1676         check_added_monitors(&nodes[0], 1);
1677         check_closed_broadcast(&nodes[0], 1, true);
1678         check_closed_event!(&nodes[0], 1, ClosureReason::HolderForceClosed, false,
1679                  [nodes[1].node.get_our_node_id()], 100000);
1680
1681         let commitment_tx = {
1682                 let mut txn = nodes[0].tx_broadcaster.txn_broadcast();
1683                 assert_eq!(txn.len(), 1);
1684                 assert_eq!(txn[0].output.len(), 3);
1685                 check_spends!(txn[0], funding_tx);
1686                 txn.pop().unwrap()
1687         };
1688
1689         mine_transaction(&nodes[0], &commitment_tx);
1690
1691         // Connect blocks until the HTLC's expiration is met, expecting a transaction broadcast.
1692         connect_blocks(&nodes[0], TEST_FINAL_CLTV);
1693         let htlc_timeout_tx = {
1694                 let mut txn = nodes[0].tx_broadcaster.txn_broadcast();
1695                 assert_eq!(txn.len(), 1);
1696                 check_spends!(txn[0], commitment_tx);
1697                 txn.pop().unwrap()
1698         };
1699
1700         // Check that we can still rebroadcast these packages/transactions if we're upgrading from an
1701         // old `ChannelMonitor` that did not exercise said rebroadcasting logic.
1702         if check_old_monitor_retries_after_upgrade {
1703                 let serialized_monitor = hex::decode(
1704 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1705                 ).unwrap();
1706                 reload_node!(nodes[0], &nodes[0].node.encode(), &[&serialized_monitor], persister, new_chain_monitor, node_deserialized);
1707         }
1708
1709         // Connecting more blocks should result in the HTLC transactions being rebroadcast.
1710         connect_blocks(&nodes[0], 6);
1711         if check_old_monitor_retries_after_upgrade {
1712                 check_added_monitors(&nodes[0], 1);
1713         }
1714         {
1715                 let txn = nodes[0].tx_broadcaster.txn_broadcast();
1716                 if !nodes[0].connect_style.borrow().skips_blocks() {
1717                         assert_eq!(txn.len(), 6);
1718                 } else {
1719                         assert!(txn.len() < 6);
1720                 }
1721                 for tx in txn {
1722                         assert_eq!(tx.input.len(), htlc_timeout_tx.input.len());
1723                         assert_eq!(tx.output.len(), htlc_timeout_tx.output.len());
1724                         assert_eq!(tx.input[0].previous_output, htlc_timeout_tx.input[0].previous_output);
1725                         assert_eq!(tx.output[0], htlc_timeout_tx.output[0]);
1726                 }
1727         }
1728 }
1729
1730 #[test]
1731 fn test_restored_packages_retry() {
1732         do_test_restored_packages_retry(false);
1733         do_test_restored_packages_retry(true);
1734 }
1735
1736 fn do_test_monitor_rebroadcast_pending_claims(anchors: bool) {
1737         // Test that we will retry broadcasting pending claims for a force-closed channel on every
1738         // `ChainMonitor::rebroadcast_pending_claims` call.
1739         let mut chanmon_cfgs = create_chanmon_cfgs(2);
1740         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1741         let mut config = test_default_channel_config();
1742         if anchors {
1743                 config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
1744                 config.manually_accept_inbound_channels = true;
1745         }
1746         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[Some(config), Some(config)]);
1747         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1748
1749         let (_, _, _, chan_id, funding_tx) = create_chan_between_nodes_with_value(
1750                 &nodes[0], &nodes[1], 1_000_000, 500_000_000
1751         );
1752         const HTLC_AMT_MSAT: u64 = 1_000_000;
1753         const HTLC_AMT_SAT: u64 = HTLC_AMT_MSAT / 1000;
1754         route_payment(&nodes[0], &[&nodes[1]], HTLC_AMT_MSAT);
1755
1756         let htlc_expiry = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1;
1757
1758         let commitment_txn = get_local_commitment_txn!(&nodes[0], &chan_id);
1759         assert_eq!(commitment_txn.len(), if anchors { 1 /* commitment tx only */} else { 2 /* commitment and htlc timeout tx */ });
1760         check_spends!(&commitment_txn[0], &funding_tx);
1761         mine_transaction(&nodes[0], &commitment_txn[0]);
1762         check_closed_broadcast!(&nodes[0], true);
1763         check_closed_event!(&nodes[0], 1, ClosureReason::CommitmentTxConfirmed,
1764                  false, [nodes[1].node.get_our_node_id()], 1000000);
1765         check_added_monitors(&nodes[0], 1);
1766
1767         let coinbase_tx = Transaction {
1768                 version: 2,
1769                 lock_time: PackedLockTime::ZERO,
1770                 input: vec![TxIn { ..Default::default() }],
1771                 output: vec![TxOut { // UTXO to attach fees to `htlc_tx` on anchors
1772                         value: Amount::ONE_BTC.to_sat(),
1773                         script_pubkey: nodes[0].wallet_source.get_change_script().unwrap(),
1774                 }],
1775         };
1776         nodes[0].wallet_source.add_utxo(bitcoin::OutPoint { txid: coinbase_tx.txid(), vout: 0 }, coinbase_tx.output[0].value);
1777
1778         // Set up a helper closure we'll use throughout our test. We should only expect retries without
1779         // bumps if fees have not increased after a block has been connected (assuming the height timer
1780         // re-evaluates at every block) or after `ChainMonitor::rebroadcast_pending_claims` is called.
1781         let mut prev_htlc_tx_feerate = None;
1782         let mut check_htlc_retry = |should_retry: bool, should_bump: bool| -> Option<Transaction> {
1783                 let (htlc_tx, htlc_tx_feerate) = if anchors {
1784                         assert!(nodes[0].tx_broadcaster.txn_broadcast().is_empty());
1785                         let events = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
1786                         assert_eq!(events.len(), if should_retry { 1 } else { 0 });
1787                         if !should_retry {
1788                                 return None;
1789                         }
1790                         match &events[0] {
1791                                 Event::BumpTransaction(event) => {
1792                                         nodes[0].bump_tx_handler.handle_event(&event);
1793                                         let mut txn = nodes[0].tx_broadcaster.unique_txn_broadcast();
1794                                         assert_eq!(txn.len(), 1);
1795                                         let htlc_tx = txn.pop().unwrap();
1796                                         check_spends!(&htlc_tx, &commitment_txn[0], &coinbase_tx);
1797                                         let htlc_tx_fee = HTLC_AMT_SAT + coinbase_tx.output[0].value -
1798                                                 htlc_tx.output.iter().map(|output| output.value).sum::<u64>();
1799                                         let htlc_tx_weight = htlc_tx.weight() as u64;
1800                                         (htlc_tx, compute_feerate_sat_per_1000_weight(htlc_tx_fee, htlc_tx_weight))
1801                                 }
1802                                 _ => panic!("Unexpected event"),
1803                         }
1804                 } else {
1805                         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
1806                         let mut txn = nodes[0].tx_broadcaster.txn_broadcast();
1807                         assert_eq!(txn.len(), if should_retry { 1 } else { 0 });
1808                         if !should_retry {
1809                                 return None;
1810                         }
1811                         let htlc_tx = txn.pop().unwrap();
1812                         check_spends!(htlc_tx, commitment_txn[0]);
1813                         let htlc_tx_fee = HTLC_AMT_SAT - htlc_tx.output[0].value;
1814                         let htlc_tx_weight = htlc_tx.weight() as u64;
1815                         (htlc_tx, compute_feerate_sat_per_1000_weight(htlc_tx_fee, htlc_tx_weight))
1816                 };
1817                 if should_bump {
1818                         assert!(htlc_tx_feerate > prev_htlc_tx_feerate.take().unwrap());
1819                 } else if let Some(prev_feerate) = prev_htlc_tx_feerate.take() {
1820                         assert_eq!(htlc_tx_feerate, prev_feerate);
1821                 }
1822                 prev_htlc_tx_feerate = Some(htlc_tx_feerate);
1823                 Some(htlc_tx)
1824         };
1825
1826         // Connect blocks up to one before the HTLC expires. This should not result in a claim/retry.
1827         connect_blocks(&nodes[0], htlc_expiry - nodes[0].best_block_info().1 - 1);
1828         check_htlc_retry(false, false);
1829
1830         // Connect one more block, producing our first claim.
1831         connect_blocks(&nodes[0], 1);
1832         check_htlc_retry(true, false);
1833
1834         // Connect one more block, expecting a retry with a fee bump. Unfortunately, we cannot bump HTLC
1835         // transactions pre-anchors.
1836         connect_blocks(&nodes[0], 1);
1837         check_htlc_retry(true, anchors);
1838
1839         // Trigger a call and we should have another retry, but without a bump.
1840         nodes[0].chain_monitor.chain_monitor.rebroadcast_pending_claims();
1841         check_htlc_retry(true, false);
1842
1843         // Double the feerate and trigger a call, expecting a fee-bumped retry.
1844         *nodes[0].fee_estimator.sat_per_kw.lock().unwrap() *= 2;
1845         nodes[0].chain_monitor.chain_monitor.rebroadcast_pending_claims();
1846         check_htlc_retry(true, anchors);
1847
1848         // Connect one more block, expecting a retry with a fee bump. Unfortunately, we cannot bump HTLC
1849         // transactions pre-anchors.
1850         connect_blocks(&nodes[0], 1);
1851         let htlc_tx = check_htlc_retry(true, anchors).unwrap();
1852
1853         // Mine the HTLC transaction to ensure we don't retry claims while they're confirmed.
1854         mine_transaction(&nodes[0], &htlc_tx);
1855         // If we have a `ConnectStyle` that advertises the new block first without the transactions,
1856         // we'll receive an extra bumped claim.
1857         if nodes[0].connect_style.borrow().updates_best_block_first() {
1858                 nodes[0].wallet_source.add_utxo(bitcoin::OutPoint { txid: coinbase_tx.txid(), vout: 0 }, coinbase_tx.output[0].value);
1859                 nodes[0].wallet_source.remove_utxo(bitcoin::OutPoint { txid: htlc_tx.txid(), vout: 1 });
1860                 check_htlc_retry(true, anchors);
1861         }
1862         nodes[0].chain_monitor.chain_monitor.rebroadcast_pending_claims();
1863         check_htlc_retry(false, false);
1864 }
1865
1866 #[test]
1867 fn test_monitor_timer_based_claim() {
1868         do_test_monitor_rebroadcast_pending_claims(false);
1869         do_test_monitor_rebroadcast_pending_claims(true);
1870 }
1871
1872 #[test]
1873 fn test_yield_anchors_events() {
1874         // Tests that two parties supporting anchor outputs can open a channel, route payments over
1875         // it, and finalize its resolution uncooperatively. Once the HTLCs are locked in, one side will
1876         // force close once the HTLCs expire. The force close should stem from an event emitted by LDK,
1877         // allowing the consumer to provide additional fees to the commitment transaction to be
1878         // broadcast. Once the commitment transaction confirms, events for the HTLC resolution should be
1879         // emitted by LDK, such that the consumer can attach fees to the zero fee HTLC transactions.
1880         let mut chanmon_cfgs = create_chanmon_cfgs(2);
1881         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1882         let mut anchors_config = UserConfig::default();
1883         anchors_config.channel_handshake_config.announced_channel = true;
1884         anchors_config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
1885         anchors_config.manually_accept_inbound_channels = true;
1886         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[Some(anchors_config), Some(anchors_config)]);
1887         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1888
1889         let (_, _, chan_id, funding_tx) = create_announced_chan_between_nodes_with_value(
1890                 &nodes, 0, 1, 1_000_000, 500_000_000
1891         );
1892         let (payment_preimage_1, payment_hash_1, ..) = route_payment(&nodes[0], &[&nodes[1]], 1_000_000);
1893         let (payment_preimage_2, payment_hash_2, ..) = route_payment(&nodes[1], &[&nodes[0]], 2_000_000);
1894
1895         assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
1896         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
1897
1898         *nodes[0].fee_estimator.sat_per_kw.lock().unwrap() *= 2;
1899
1900         connect_blocks(&nodes[0], TEST_FINAL_CLTV + LATENCY_GRACE_PERIOD_BLOCKS + 1);
1901         assert!(nodes[0].tx_broadcaster.txn_broadcast().is_empty());
1902
1903         connect_blocks(&nodes[1], TEST_FINAL_CLTV + LATENCY_GRACE_PERIOD_BLOCKS + 1);
1904         {
1905                 let txn = nodes[1].tx_broadcaster.txn_broadcast();
1906                 assert_eq!(txn.len(), 1);
1907                 check_spends!(txn[0], funding_tx);
1908         }
1909
1910         get_monitor!(nodes[0], chan_id).provide_payment_preimage(
1911                 &payment_hash_2, &payment_preimage_2, &node_cfgs[0].tx_broadcaster,
1912                 &LowerBoundedFeeEstimator::new(node_cfgs[0].fee_estimator), &nodes[0].logger
1913         );
1914         get_monitor!(nodes[1], chan_id).provide_payment_preimage(
1915                 &payment_hash_1, &payment_preimage_1, &node_cfgs[0].tx_broadcaster,
1916                 &LowerBoundedFeeEstimator::new(node_cfgs[1].fee_estimator), &nodes[1].logger
1917         );
1918
1919         let mut holder_events = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
1920         assert_eq!(holder_events.len(), 1);
1921         let (commitment_tx, anchor_tx) = match holder_events.pop().unwrap() {
1922                 Event::BumpTransaction(event) => {
1923                         let coinbase_tx = Transaction {
1924                                 version: 2,
1925                                 lock_time: PackedLockTime::ZERO,
1926                                 input: vec![TxIn { ..Default::default() }],
1927                                 output: vec![TxOut { // UTXO to attach fees to `anchor_tx`
1928                                         value: Amount::ONE_BTC.to_sat(),
1929                                         script_pubkey: nodes[0].wallet_source.get_change_script().unwrap(),
1930                                 }],
1931                         };
1932                         nodes[0].wallet_source.add_utxo(bitcoin::OutPoint { txid: coinbase_tx.txid(), vout: 0 }, coinbase_tx.output[0].value);
1933                         nodes[0].bump_tx_handler.handle_event(&event);
1934                         let mut txn = nodes[0].tx_broadcaster.unique_txn_broadcast();
1935                         assert_eq!(txn.len(), 2);
1936                         let anchor_tx = txn.pop().unwrap();
1937                         let commitment_tx = txn.pop().unwrap();
1938                         check_spends!(commitment_tx, funding_tx);
1939                         check_spends!(anchor_tx, coinbase_tx, commitment_tx);
1940                         (commitment_tx, anchor_tx)
1941                 },
1942                 _ => panic!("Unexpected event"),
1943         };
1944
1945         assert_eq!(commitment_tx.output[2].value, 1_000); // HTLC A -> B
1946         assert_eq!(commitment_tx.output[3].value, 2_000); // HTLC B -> A
1947
1948         mine_transactions(&nodes[0], &[&commitment_tx, &anchor_tx]);
1949         check_added_monitors!(nodes[0], 1);
1950         mine_transactions(&nodes[1], &[&commitment_tx, &anchor_tx]);
1951         check_added_monitors!(nodes[1], 1);
1952
1953         {
1954                 let mut txn = nodes[1].tx_broadcaster.unique_txn_broadcast();
1955                 assert_eq!(txn.len(), if nodes[1].connect_style.borrow().updates_best_block_first() { 3 } else { 2 });
1956
1957                 let htlc_preimage_tx = txn.pop().unwrap();
1958                 assert_eq!(htlc_preimage_tx.input.len(), 1);
1959                 assert_eq!(htlc_preimage_tx.input[0].previous_output.vout, 3);
1960                 check_spends!(htlc_preimage_tx, commitment_tx);
1961
1962                 let htlc_timeout_tx = txn.pop().unwrap();
1963                 assert_eq!(htlc_timeout_tx.input.len(), 1);
1964                 assert_eq!(htlc_timeout_tx.input[0].previous_output.vout, 2);
1965                 check_spends!(htlc_timeout_tx, commitment_tx);
1966
1967                 if let Some(commitment_tx) = txn.pop() {
1968                         check_spends!(commitment_tx, funding_tx);
1969                 }
1970         }
1971
1972         let mut holder_events = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
1973         // Certain block `ConnectStyle`s cause an extra `ChannelClose` event to be emitted since the
1974         // best block is updated before the confirmed transactions are notified.
1975         if nodes[0].connect_style.borrow().updates_best_block_first() {
1976                 assert_eq!(holder_events.len(), 3);
1977                 if let Event::BumpTransaction(BumpTransactionEvent::ChannelClose { .. }) = holder_events.remove(0) {}
1978                 else { panic!("unexpected event"); }
1979         } else {
1980                 assert_eq!(holder_events.len(), 2);
1981         }
1982         let mut htlc_txs = Vec::with_capacity(2);
1983         for event in holder_events {
1984                 match event {
1985                         Event::BumpTransaction(event) => {
1986                                 nodes[0].bump_tx_handler.handle_event(&event);
1987                                 let mut txn = nodes[0].tx_broadcaster.unique_txn_broadcast();
1988                                 assert_eq!(txn.len(), 1);
1989                                 let htlc_tx = txn.pop().unwrap();
1990                                 check_spends!(htlc_tx, commitment_tx, anchor_tx);
1991                                 htlc_txs.push(htlc_tx);
1992                         },
1993                         _ => panic!("Unexpected event"),
1994                 }
1995         }
1996
1997         mine_transactions(&nodes[0], &[&htlc_txs[0], &htlc_txs[1]]);
1998         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
1999
2000         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
2001
2002         connect_blocks(&nodes[0], BREAKDOWN_TIMEOUT as u32);
2003
2004         let holder_events = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
2005         assert_eq!(holder_events.len(), 3);
2006         for event in holder_events {
2007                 match event {
2008                         Event::SpendableOutputs { .. } => {},
2009                         _ => panic!("Unexpected event"),
2010                 }
2011         }
2012
2013         // Clear the remaining events as they're not relevant to what we're testing.
2014         nodes[0].node.get_and_clear_pending_events();
2015         nodes[1].node.get_and_clear_pending_events();
2016         nodes[0].node.get_and_clear_pending_msg_events();
2017         nodes[1].node.get_and_clear_pending_msg_events();
2018 }
2019
2020 #[test]
2021 fn test_anchors_aggregated_revoked_htlc_tx() {
2022         // Test that `ChannelMonitor`s can properly detect and claim funds from a counterparty claiming
2023         // multiple HTLCs from multiple channels in a single transaction via the success path from a
2024         // revoked commitment.
2025         let secp = Secp256k1::new();
2026         let mut chanmon_cfgs = create_chanmon_cfgs(2);
2027         // Required to sign a revoked commitment transaction
2028         chanmon_cfgs[1].keys_manager.disable_revocation_policy_check = true;
2029         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
2030         let bob_persister;
2031         let bob_chain_monitor;
2032
2033         let mut anchors_config = UserConfig::default();
2034         anchors_config.channel_handshake_config.announced_channel = true;
2035         anchors_config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
2036         anchors_config.manually_accept_inbound_channels = true;
2037         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[Some(anchors_config), Some(anchors_config)]);
2038         let bob_deserialized;
2039
2040         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
2041
2042         let chan_a = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 20_000_000);
2043         let chan_b = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 20_000_000);
2044
2045         // Serialize Bob with the initial state of both channels, which we'll use later.
2046         let bob_serialized = nodes[1].node.encode();
2047
2048         // Route two payments for each channel from Alice to Bob to lock in the HTLCs.
2049         let payment_a = route_payment(&nodes[0], &[&nodes[1]], 50_000_000);
2050         let payment_b = route_payment(&nodes[0], &[&nodes[1]], 50_000_000);
2051         let payment_c = route_payment(&nodes[0], &[&nodes[1]], 50_000_000);
2052         let payment_d = route_payment(&nodes[0], &[&nodes[1]], 50_000_000);
2053
2054         // Serialize Bob's monitors with the HTLCs locked in. We'll restart Bob later on with the state
2055         // at this point such that he broadcasts a revoked commitment transaction with the HTLCs
2056         // present.
2057         let bob_serialized_monitor_a = get_monitor!(nodes[1], chan_a.2).encode();
2058         let bob_serialized_monitor_b = get_monitor!(nodes[1], chan_b.2).encode();
2059
2060         // Bob claims all the HTLCs...
2061         claim_payment(&nodes[0], &[&nodes[1]], payment_a.0);
2062         claim_payment(&nodes[0], &[&nodes[1]], payment_b.0);
2063         claim_payment(&nodes[0], &[&nodes[1]], payment_c.0);
2064         claim_payment(&nodes[0], &[&nodes[1]], payment_d.0);
2065
2066         // ...and sends one back through each channel such that he has a motive to broadcast his
2067         // revoked state.
2068         send_payment(&nodes[1], &[&nodes[0]], 30_000_000);
2069         send_payment(&nodes[1], &[&nodes[0]], 30_000_000);
2070
2071         // Restart Bob with the revoked state and provide the HTLC preimages he claimed.
2072         reload_node!(
2073                 nodes[1], anchors_config, bob_serialized, &[&bob_serialized_monitor_a, &bob_serialized_monitor_b],
2074                 bob_persister, bob_chain_monitor, bob_deserialized
2075         );
2076         for chan_id in [chan_a.2, chan_b.2].iter() {
2077                 let monitor = get_monitor!(nodes[1], chan_id);
2078                 for payment in [payment_a, payment_b, payment_c, payment_d].iter() {
2079                         monitor.provide_payment_preimage(
2080                                 &payment.1, &payment.0, &node_cfgs[1].tx_broadcaster,
2081                                 &LowerBoundedFeeEstimator::new(node_cfgs[1].fee_estimator), &nodes[1].logger
2082                         );
2083                 }
2084         }
2085
2086         // Bob force closes by restarting with the outdated state, prompting the ChannelMonitors to
2087         // broadcast the latest commitment transaction known to them, which in our case is the one with
2088         // the HTLCs still pending.
2089         *nodes[1].fee_estimator.sat_per_kw.lock().unwrap() *= 2;
2090         nodes[1].node.timer_tick_occurred();
2091         check_added_monitors(&nodes[1], 2);
2092         check_closed_event!(&nodes[1], 2, ClosureReason::OutdatedChannelManager, [nodes[0].node.get_our_node_id(); 2], 1000000);
2093         let (revoked_commitment_a, revoked_commitment_b) = {
2094                 let txn = nodes[1].tx_broadcaster.unique_txn_broadcast();
2095                 assert_eq!(txn.len(), 2);
2096                 assert_eq!(txn[0].output.len(), 6); // 2 HTLC outputs + 1 to_self output + 1 to_remote output + 2 anchor outputs
2097                 assert_eq!(txn[1].output.len(), 6); // 2 HTLC outputs + 1 to_self output + 1 to_remote output + 2 anchor outputs
2098                 if txn[0].input[0].previous_output.txid == chan_a.3.txid() {
2099                         check_spends!(&txn[0], &chan_a.3);
2100                         check_spends!(&txn[1], &chan_b.3);
2101                         (txn[0].clone(), txn[1].clone())
2102                 } else {
2103                         check_spends!(&txn[1], &chan_a.3);
2104                         check_spends!(&txn[0], &chan_b.3);
2105                         (txn[1].clone(), txn[0].clone())
2106                 }
2107         };
2108
2109         // Bob should now receive two events to bump his revoked commitment transaction fees.
2110         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
2111         let events = nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events();
2112         assert_eq!(events.len(), 2);
2113         let mut anchor_txs = Vec::with_capacity(events.len());
2114         for (idx, event) in events.into_iter().enumerate() {
2115                 let utxo_value = Amount::ONE_BTC.to_sat() * (idx + 1) as u64;
2116                 let coinbase_tx = Transaction {
2117                         version: 2,
2118                         lock_time: PackedLockTime::ZERO,
2119                         input: vec![TxIn { ..Default::default() }],
2120                         output: vec![TxOut { // UTXO to attach fees to `anchor_tx`
2121                                 value: utxo_value,
2122                                 script_pubkey: nodes[1].wallet_source.get_change_script().unwrap(),
2123                         }],
2124                 };
2125                 nodes[1].wallet_source.add_utxo(bitcoin::OutPoint { txid: coinbase_tx.txid(), vout: 0 }, utxo_value);
2126                 match event {
2127                         Event::BumpTransaction(event) => nodes[1].bump_tx_handler.handle_event(&event),
2128                         _ => panic!("Unexpected event"),
2129                 };
2130                 let txn = nodes[1].tx_broadcaster.txn_broadcast();
2131                 assert_eq!(txn.len(), 2);
2132                 let (commitment_tx, anchor_tx) = (&txn[0], &txn[1]);
2133                 check_spends!(anchor_tx, coinbase_tx, commitment_tx);
2134                 anchor_txs.push(anchor_tx.clone());
2135         };
2136
2137         for node in &nodes {
2138                 mine_transactions(node, &[&revoked_commitment_a, &anchor_txs[0], &revoked_commitment_b, &anchor_txs[1]]);
2139         }
2140         check_added_monitors!(&nodes[0], 2);
2141         check_closed_broadcast(&nodes[0], 2, true);
2142         check_closed_event!(&nodes[0], 2, ClosureReason::CommitmentTxConfirmed, [nodes[1].node.get_our_node_id(); 2], 1000000);
2143
2144         // Alice should detect the confirmed revoked commitments, and attempt to claim all of the
2145         // revoked outputs.
2146         {
2147                 let txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
2148                 assert_eq!(txn.len(), 4);
2149
2150                 let (revoked_htlc_claim_a, revoked_htlc_claim_b) = if txn[0].input[0].previous_output.txid == revoked_commitment_a.txid() {
2151                         (if txn[0].input.len() == 2 { &txn[0] } else { &txn[1] }, if txn[2].input.len() == 2 { &txn[2] } else { &txn[3] })
2152                 } else {
2153                         (if txn[2].input.len() == 2 { &txn[2] } else { &txn[3] }, if txn[0].input.len() == 2 { &txn[0] } else { &txn[1] })
2154                 };
2155
2156                 assert_eq!(revoked_htlc_claim_a.input.len(), 2); // Spends both HTLC outputs
2157                 assert_eq!(revoked_htlc_claim_a.output.len(), 1);
2158                 check_spends!(revoked_htlc_claim_a, revoked_commitment_a);
2159                 assert_eq!(revoked_htlc_claim_b.input.len(), 2); // Spends both HTLC outputs
2160                 assert_eq!(revoked_htlc_claim_b.output.len(), 1);
2161                 check_spends!(revoked_htlc_claim_b, revoked_commitment_b);
2162         }
2163
2164         // Since Bob was able to confirm his revoked commitment, he'll now try to claim the HTLCs
2165         // through the success path.
2166         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
2167         let mut events = nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events();
2168         // Certain block `ConnectStyle`s cause an extra `ChannelClose` event to be emitted since the
2169         // best block is updated before the confirmed transactions are notified.
2170         match *nodes[1].connect_style.borrow() {
2171                 ConnectStyle::BestBlockFirst|ConnectStyle::BestBlockFirstReorgsOnlyTip|ConnectStyle::BestBlockFirstSkippingBlocks => {
2172                         assert_eq!(events.len(), 4);
2173                         if let Event::BumpTransaction(BumpTransactionEvent::ChannelClose { .. }) = events.remove(0) {}
2174                         else { panic!("unexpected event"); }
2175                         if let Event::BumpTransaction(BumpTransactionEvent::ChannelClose { .. }) = events.remove(1) {}
2176                         else { panic!("unexpected event"); }
2177
2178                 },
2179                 _ => assert_eq!(events.len(), 2),
2180         };
2181         let htlc_tx = {
2182                 let secret_key = SecretKey::from_slice(&[1; 32]).unwrap();
2183                 let public_key = PublicKey::new(secret_key.public_key(&secp));
2184                 let fee_utxo_script = Script::new_v0_p2wpkh(&public_key.wpubkey_hash().unwrap());
2185                 let coinbase_tx = Transaction {
2186                         version: 2,
2187                         lock_time: PackedLockTime::ZERO,
2188                         input: vec![TxIn { ..Default::default() }],
2189                         output: vec![TxOut { // UTXO to attach fees to `htlc_tx`
2190                                 value: Amount::ONE_BTC.to_sat(),
2191                                 script_pubkey: fee_utxo_script.clone(),
2192                         }],
2193                 };
2194                 let mut htlc_tx = Transaction {
2195                         version: 2,
2196                         lock_time: PackedLockTime::ZERO,
2197                         input: vec![TxIn { // Fee input
2198                                 previous_output: bitcoin::OutPoint { txid: coinbase_tx.txid(), vout: 0 },
2199                                 ..Default::default()
2200                         }],
2201                         output: vec![TxOut { // Fee input change
2202                                 value: coinbase_tx.output[0].value / 2 ,
2203                                 script_pubkey: Script::new_op_return(&[]),
2204                         }],
2205                 };
2206                 let mut descriptors = Vec::with_capacity(4);
2207                 for event in events {
2208                         // We don't use the `BumpTransactionEventHandler` here because it does not support
2209                         // creating one transaction from multiple `HTLCResolution` events.
2210                         if let Event::BumpTransaction(BumpTransactionEvent::HTLCResolution { mut htlc_descriptors, tx_lock_time, .. }) = event {
2211                                 assert_eq!(htlc_descriptors.len(), 2);
2212                                 for htlc_descriptor in &htlc_descriptors {
2213                                         assert!(!htlc_descriptor.htlc.offered);
2214                                         htlc_tx.input.push(htlc_descriptor.unsigned_tx_input());
2215                                         htlc_tx.output.push(htlc_descriptor.tx_output(&secp));
2216                                 }
2217                                 descriptors.append(&mut htlc_descriptors);
2218                                 htlc_tx.lock_time = tx_lock_time;
2219                         } else {
2220                                 panic!("Unexpected event");
2221                         }
2222                 }
2223                 for (idx, htlc_descriptor) in descriptors.into_iter().enumerate() {
2224                         let htlc_input_idx = idx + 1;
2225                         let signer = htlc_descriptor.derive_channel_signer(&nodes[1].keys_manager);
2226                         let our_sig = signer.sign_holder_htlc_transaction(&htlc_tx, htlc_input_idx, &htlc_descriptor, &secp).unwrap();
2227                         let witness_script = htlc_descriptor.witness_script(&secp);
2228                         htlc_tx.input[htlc_input_idx].witness = htlc_descriptor.tx_input_witness(&our_sig, &witness_script);
2229                 }
2230                 let fee_utxo_sig = {
2231                         let witness_script = Script::new_p2pkh(&public_key.pubkey_hash());
2232                         let sighash = hash_to_message!(&SighashCache::new(&htlc_tx).segwit_signature_hash(
2233                                 0, &witness_script, coinbase_tx.output[0].value, EcdsaSighashType::All
2234                         ).unwrap()[..]);
2235                         let sig = sign(&secp, &sighash, &secret_key);
2236                         let mut sig = sig.serialize_der().to_vec();
2237                         sig.push(EcdsaSighashType::All as u8);
2238                         sig
2239                 };
2240                 htlc_tx.input[0].witness = Witness::from_vec(vec![fee_utxo_sig, public_key.to_bytes()]);
2241                 check_spends!(htlc_tx, coinbase_tx, revoked_commitment_a, revoked_commitment_b);
2242                 htlc_tx
2243         };
2244
2245         for node in &nodes {
2246                 mine_transaction(node, &htlc_tx);
2247         }
2248
2249         // Alice should see that Bob is trying to claim to HTLCs, so she should now try to claim them at
2250         // the second level instead.
2251         let revoked_claim_transactions = {
2252                 let txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
2253                 assert_eq!(txn.len(), 2);
2254
2255                 let revoked_htlc_claims = txn.iter().filter(|tx|
2256                         tx.input.len() == 2 &&
2257                         tx.output.len() == 1 &&
2258                         tx.input[0].previous_output.txid == htlc_tx.txid()
2259                 ).collect::<Vec<_>>();
2260                 assert_eq!(revoked_htlc_claims.len(), 2);
2261                 for revoked_htlc_claim in revoked_htlc_claims {
2262                         check_spends!(revoked_htlc_claim, htlc_tx);
2263                 }
2264
2265                 let mut revoked_claim_transaction_map = HashMap::new();
2266                 for current_tx in txn.into_iter() {
2267                         revoked_claim_transaction_map.insert(current_tx.txid(), current_tx);
2268                 }
2269                 revoked_claim_transaction_map
2270         };
2271         for node in &nodes {
2272                 mine_transactions(node, &revoked_claim_transactions.values().collect::<Vec<_>>());
2273         }
2274
2275
2276         // Connect one block to make sure the HTLC events are not yielded while ANTI_REORG_DELAY has not
2277         // been reached.
2278         connect_blocks(&nodes[0], 1);
2279         connect_blocks(&nodes[1], 1);
2280
2281         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
2282         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
2283
2284         // Connect the remaining blocks to reach ANTI_REORG_DELAY.
2285         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 2);
2286         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
2287
2288         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
2289         let spendable_output_events = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
2290         assert_eq!(spendable_output_events.len(), 2);
2291         for event in spendable_output_events.iter() {
2292                 if let Event::SpendableOutputs { outputs, channel_id } = event {
2293                         assert_eq!(outputs.len(), 1);
2294                         assert!(vec![chan_b.2, chan_a.2].contains(&channel_id.unwrap()));
2295                         let spend_tx = nodes[0].keys_manager.backing.spend_spendable_outputs(
2296                                 &[&outputs[0]], Vec::new(), Script::new_op_return(&[]), 253, None, &Secp256k1::new(),
2297                         ).unwrap();
2298
2299                         check_spends!(spend_tx, revoked_claim_transactions.get(&spend_tx.input[0].previous_output.txid).unwrap());
2300                 } else {
2301                         panic!("unexpected event");
2302                 }
2303         }
2304
2305         assert!(nodes[0].node.list_channels().is_empty());
2306         assert!(nodes[1].node.list_channels().is_empty());
2307         // On the Alice side, the individual to_self_claim are still pending confirmation.
2308         assert_eq!(nodes[0].chain_monitor.chain_monitor.get_claimable_balances(&[]).len(), 2);
2309         // TODO: From Bob's PoV, he still thinks he can claim the outputs from his revoked commitment.
2310         // This needs to be fixed before we enable pruning `ChannelMonitor`s once they don't have any
2311         // balances to claim.
2312         //
2313         // The 6 claimable balances correspond to his `to_self` outputs and the 2 HTLC outputs in each
2314         // revoked commitment which Bob has the preimage for.
2315         assert_eq!(nodes[1].chain_monitor.chain_monitor.get_claimable_balances(&[]).len(), 6);
2316 }