_ 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 #[cfg(anchors)]
  13 use crate::sign::{ChannelSigner, EcdsaChannelSigner};
  14 #[cfg(anchors)]
  15 use crate::chain::channelmonitor::LATENCY_GRACE_PERIOD_BLOCKS;
  16 use crate::chain::channelmonitor::{ANTI_REORG_DELAY, Balance};
  17 use crate::chain::transaction::OutPoint;
  18 use crate::chain::chaininterface::LowerBoundedFeeEstimator;
  19 #[cfg(anchors)]
  20 use crate::events::bump_transaction::BumpTransactionEvent;
  21 use crate::events::{Event, MessageSendEvent, MessageSendEventsProvider, ClosureReason, HTLCDestination};
  22 use crate::ln::channel;
  23 #[cfg(anchors)]
  24 use crate::ln::chan_utils;
  25 #[cfg(anchors)]
  26 use crate::ln::channelmanager::ChannelManager;
  27 use crate::ln::channelmanager::{BREAKDOWN_TIMEOUT, PaymentId, RecipientOnionFields};
  28 use crate::ln::msgs::ChannelMessageHandler;
  29 #[cfg(anchors)]
  30 use crate::util::config::UserConfig;
  31 #[cfg(anchors)]
  32 use crate::util::crypto::sign;
  33 use crate::util::ser::Writeable;
  34 use crate::util::test_utils;
  35
  36 #[cfg(anchors)]
  37 use bitcoin::blockdata::transaction::EcdsaSighashType;
  38 use bitcoin::blockdata::script::Builder;
  39 use bitcoin::blockdata::opcodes;
  40 use bitcoin::secp256k1::Secp256k1;
  41 #[cfg(anchors)]
  42 use bitcoin::secp256k1::SecretKey;
  43 #[cfg(anchors)]
  44 use bitcoin::{Amount, PublicKey, Script, TxIn, TxOut, PackedLockTime, Witness};
  45 use bitcoin::Transaction;
  46 #[cfg(anchors)]
  47 use bitcoin::util::sighash::SighashCache;
  48
  49 use crate::prelude::*;
  50
  51 use crate::ln::functional_test_utils::*;
  52
  53 #[test]
  54 fn chanmon_fail_from_stale_commitment() {
  55         // If we forward an HTLC to our counterparty, but we force-closed the channel before our
  56         // counterparty provides us an updated commitment transaction, we'll end up with a commitment
  57         // transaction that does not contain the HTLC which we attempted to forward. In this case, we
  58         // need to wait `ANTI_REORG_DELAY` blocks and then fail back the HTLC as there is no way for us
  59         // to learn the preimage and the confirmed commitment transaction paid us the value of the
  60         // HTLC.
  61         //
  62         // However, previously, we did not do this, ignoring the HTLC entirely.
  63         //
  64         // This could lead to channel closure if the sender we received the HTLC from decides to go on
  65         // chain to get their HTLC back before it times out.
  66         //
  67         // Here, we check exactly this case, forwarding a payment from A, through B, to C, before B
  68         // broadcasts its latest commitment transaction, which should result in it eventually failing
  69         // the HTLC back off-chain to A.
  70         let chanmon_cfgs = create_chanmon_cfgs(3);
  71         let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
  72         let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
  73         let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
  74
  75         create_announced_chan_between_nodes(&nodes, 0, 1);
  76         let (update_a, _, chan_id_2, _) = create_announced_chan_between_nodes(&nodes, 1, 2);
  77
  78         let (route, payment_hash, _, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[2], 1_000_000);
  79         nodes[0].node.send_payment_with_route(&route, payment_hash,
  80                 RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_hash.0)).unwrap();
  81         check_added_monitors!(nodes[0], 1);
  82
  83         let bs_txn = get_local_commitment_txn!(nodes[1], chan_id_2);
  84
  85         let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
  86         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
  87         commitment_signed_dance!(nodes[1], nodes[0], updates.commitment_signed, false);
  88
  89         expect_pending_htlcs_forwardable!(nodes[1]);
  90         get_htlc_update_msgs!(nodes[1], nodes[2].node.get_our_node_id());
  91         check_added_monitors!(nodes[1], 1);
  92
  93         // Don't bother delivering the new HTLC add/commits, instead confirming the pre-HTLC commitment
  94         // transaction for nodes[1].
  95         mine_transaction(&nodes[1], &bs_txn[0]);
  96         check_added_monitors!(nodes[1], 1);
  97         check_closed_broadcast!(nodes[1], true);
  98         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
  99         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 100
 101         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 102         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 }]);
 103         check_added_monitors!(nodes[1], 1);
 104         let fail_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 105
 106         nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &fail_updates.update_fail_htlcs[0]);
 107         commitment_signed_dance!(nodes[0], nodes[1], fail_updates.commitment_signed, true, true);
 108         expect_payment_failed_with_update!(nodes[0], payment_hash, false, update_a.contents.short_channel_id, true);
 109 }
 110
 111 fn test_spendable_output<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, spendable_tx: &Transaction) {
 112         let mut spendable = node.chain_monitor.chain_monitor.get_and_clear_pending_events();
 113         assert_eq!(spendable.len(), 1);
 114         if let Event::SpendableOutputs { outputs } = spendable.pop().unwrap() {
 115                 assert_eq!(outputs.len(), 1);
 116                 let spend_tx = node.keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(),
 117                         Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, None, &Secp256k1::new()).unwrap();
 118                 check_spends!(spend_tx, spendable_tx);
 119         } else { panic!(); }
 120 }
 121
 122 #[test]
 123 fn revoked_output_htlc_resolution_timing() {
 124         // Tests that HTLCs which were present in a broadcasted remote revoked commitment transaction
 125         // are resolved only after a spend of the HTLC output reaches six confirmations. Preivously
 126         // they would resolve after the revoked commitment transaction itself reaches six
 127         // confirmations.
 128         let chanmon_cfgs = create_chanmon_cfgs(2);
 129         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 130         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 131         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 132
 133         let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 500_000_000);
 134
 135         let payment_hash_1 = route_payment(&nodes[1], &[&nodes[0]], 1_000_000).1;
 136
 137         // Get a commitment transaction which contains the HTLC we care about, but which we'll revoke
 138         // before forwarding.
 139         let revoked_local_txn = get_local_commitment_txn!(nodes[0], chan.2);
 140         assert_eq!(revoked_local_txn.len(), 1);
 141
 142         // Route a dust payment to revoke the above commitment transaction
 143         route_payment(&nodes[0], &[&nodes[1]], 1_000);
 144
 145         // Confirm the revoked commitment transaction, closing the channel.
 146         mine_transaction(&nodes[1], &revoked_local_txn[0]);
 147         check_added_monitors!(nodes[1], 1);
 148         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
 149         check_closed_broadcast!(nodes[1], true);
 150
 151         let bs_spend_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 152         assert_eq!(bs_spend_txn.len(), 1);
 153         check_spends!(bs_spend_txn[0], revoked_local_txn[0]);
 154
 155         // After the commitment transaction confirms, we should still wait on the HTLC spend
 156         // transaction to confirm before resolving the HTLC.
 157         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 158         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 159         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 160
 161         // Spend the HTLC output, generating a HTLC failure event after ANTI_REORG_DELAY confirmations.
 162         mine_transaction(&nodes[1], &bs_spend_txn[0]);
 163         assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 164         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 165
 166         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 167         expect_payment_failed!(nodes[1], payment_hash_1, false);
 168 }
 169
 170 #[test]
 171 fn chanmon_claim_value_coop_close() {
 172         // Tests `get_claimable_balances` returns the correct values across a simple cooperative claim.
 173         // Specifically, this tests that the channel non-HTLC balances show up in
 174         // `get_claimable_balances` until the cooperative claims have confirmed and generated a
 175         // `SpendableOutputs` event, and no longer.
 176         let chanmon_cfgs = create_chanmon_cfgs(2);
 177         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 178         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 179         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 180
 181         let (_, _, chan_id, funding_tx) =
 182                 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 1_000_000);
 183         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
 184         assert_eq!(funding_outpoint.to_channel_id(), chan_id);
 185
 186         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
 187         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
 188
 189         assert_eq!(vec![Balance::ClaimableOnChannelClose {
 190                         claimable_amount_satoshis: 1_000_000 - 1_000 - chan_feerate * channel::commitment_tx_base_weight(&channel_type_features) / 1000
 191                 }],
 192                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 193         assert_eq!(vec![Balance::ClaimableOnChannelClose { claimable_amount_satoshis: 1_000, }],
 194                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 195
 196         nodes[0].node.close_channel(&chan_id, &nodes[1].node.get_our_node_id()).unwrap();
 197         let node_0_shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
 198         nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &node_0_shutdown);
 199         let node_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
 200         nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &node_1_shutdown);
 201
 202         let node_0_closing_signed = get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id());
 203         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_closing_signed);
 204         let node_1_closing_signed = get_event_msg!(nodes[1], MessageSendEvent::SendClosingSigned, nodes[0].node.get_our_node_id());
 205         nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &node_1_closing_signed);
 206         let (_, node_0_2nd_closing_signed) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
 207         nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &node_0_2nd_closing_signed.unwrap());
 208         let (_, node_1_none) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
 209         assert!(node_1_none.is_none());
 210
 211         let shutdown_tx = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 212         assert_eq!(shutdown_tx, nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0));
 213         assert_eq!(shutdown_tx.len(), 1);
 214
 215         mine_transaction(&nodes[0], &shutdown_tx[0]);
 216         mine_transaction(&nodes[1], &shutdown_tx[0]);
 217
 218         assert!(nodes[0].node.list_channels().is_empty());
 219         assert!(nodes[1].node.list_channels().is_empty());
 220
 221         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 222         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 223
 224         assert_eq!(vec![Balance::ClaimableAwaitingConfirmations {
 225                         claimable_amount_satoshis: 1_000_000 - 1_000 - chan_feerate * channel::commitment_tx_base_weight(&channel_type_features) / 1000,
 226                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1,
 227                 }],
 228                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 229         assert_eq!(vec![Balance::ClaimableAwaitingConfirmations {
 230                         claimable_amount_satoshis: 1000,
 231                         confirmation_height: nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1,
 232                 }],
 233                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 234
 235         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
 236         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 237
 238         assert_eq!(Vec::<Balance>::new(),
 239                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 240         assert_eq!(Vec::<Balance>::new(),
 241                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 242
 243         test_spendable_output(&nodes[0], &shutdown_tx[0]);
 244         test_spendable_output(&nodes[1], &shutdown_tx[0]);
 245
 246         check_closed_event!(nodes[0], 1, ClosureReason::CooperativeClosure);
 247         check_closed_event!(nodes[1], 1, ClosureReason::CooperativeClosure);
 248 }
 249
 250 fn sorted_vec<T: Ord>(mut v: Vec<T>) -> Vec<T> {
 251         v.sort_unstable();
 252         v
 253 }
 254
 255 /// Asserts that `a` and `b` are close, but maybe off by up to 5.
 256 /// This is useful when checking fees and weights on transactions as things may vary by a few based
 257 /// on signature size and signature size estimation being non-exact.
 258 fn fuzzy_assert_eq<V: core::convert::TryInto<u64>>(a: V, b: V) {
 259         let a_u64 = a.try_into().map_err(|_| ()).unwrap();
 260         let b_u64 = b.try_into().map_err(|_| ()).unwrap();
 261         eprintln!("Checking {} and {} for fuzzy equality", a_u64, b_u64);
 262         assert!(a_u64 >= b_u64 - 5);
 263         assert!(b_u64 >= a_u64 - 5);
 264 }
 265
 266 fn do_test_claim_value_force_close(prev_commitment_tx: bool) {
 267         // Tests `get_claimable_balances` with an HTLC across a force-close.
 268         // We build a channel with an HTLC pending, then force close the channel and check that the
 269         // `get_claimable_balances` return value is correct as transactions confirm on-chain.
 270         let mut chanmon_cfgs = create_chanmon_cfgs(2);
 271         if prev_commitment_tx {
 272                 // We broadcast a second-to-latest commitment transaction, without providing the revocation
 273                 // secret to the counterparty. However, because we always immediately take the revocation
 274                 // secret from the keys_manager, we would panic at broadcast as we're trying to sign a
 275                 // transaction which, from the point of view of our keys_manager, is revoked.
 276                 chanmon_cfgs[1].keys_manager.disable_revocation_policy_check = true;
 277         }
 278         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 279         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 280         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 281
 282         let (_, _, chan_id, funding_tx) =
 283                 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 1_000_000);
 284         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
 285         assert_eq!(funding_outpoint.to_channel_id(), chan_id);
 286
 287         // This HTLC is immediately claimed, giving node B the preimage
 288         let (payment_preimage, payment_hash, _) = route_payment(&nodes[0], &[&nodes[1]], 3_000_000);
 289         // This HTLC is allowed to time out, letting A claim it. However, in order to test claimable
 290         // balances more fully we also give B the preimage for this HTLC.
 291         let (timeout_payment_preimage, timeout_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1]], 4_000_000);
 292         // This HTLC will be dust, and not be claimable at all:
 293         let (dust_payment_preimage, dust_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1]], 3_000);
 294
 295         let htlc_cltv_timeout = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
 296
 297         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
 298         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
 299
 300         let remote_txn = get_local_commitment_txn!(nodes[1], chan_id);
 301         let sent_htlc_balance = Balance::MaybeTimeoutClaimableHTLC {
 302                 claimable_amount_satoshis: 3_000,
 303                 claimable_height: htlc_cltv_timeout,
 304                 payment_hash,
 305         };
 306         let sent_htlc_timeout_balance = Balance::MaybeTimeoutClaimableHTLC {
 307                 claimable_amount_satoshis: 4_000,
 308                 claimable_height: htlc_cltv_timeout,
 309                 payment_hash: timeout_payment_hash,
 310         };
 311         let received_htlc_balance = Balance::MaybePreimageClaimableHTLC {
 312                 claimable_amount_satoshis: 3_000,
 313                 expiry_height: htlc_cltv_timeout,
 314                 payment_hash,
 315         };
 316         let received_htlc_timeout_balance = Balance::MaybePreimageClaimableHTLC {
 317                 claimable_amount_satoshis: 4_000,
 318                 expiry_height: htlc_cltv_timeout,
 319                 payment_hash: timeout_payment_hash,
 320         };
 321         let received_htlc_claiming_balance = Balance::ContentiousClaimable {
 322                 claimable_amount_satoshis: 3_000,
 323                 timeout_height: htlc_cltv_timeout,
 324                 payment_hash,
 325                 payment_preimage,
 326         };
 327         let received_htlc_timeout_claiming_balance = Balance::ContentiousClaimable {
 328                 claimable_amount_satoshis: 4_000,
 329                 timeout_height: htlc_cltv_timeout,
 330                 payment_hash: timeout_payment_hash,
 331                 payment_preimage: timeout_payment_preimage,
 332         };
 333
 334         // Before B receives the payment preimage, it only suggests the push_msat value of 1_000 sats
 335         // as claimable. A lists both its to-self balance and the (possibly-claimable) HTLCs.
 336         assert_eq!(sorted_vec(vec![Balance::ClaimableOnChannelClose {
 337                         claimable_amount_satoshis: 1_000_000 - 3_000 - 4_000 - 1_000 - 3 - chan_feerate *
 338                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 339                 }, sent_htlc_balance.clone(), sent_htlc_timeout_balance.clone()]),
 340                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 341         assert_eq!(sorted_vec(vec![Balance::ClaimableOnChannelClose {
 342                         claimable_amount_satoshis: 1_000,
 343                 }, received_htlc_balance.clone(), received_htlc_timeout_balance.clone()]),
 344                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 345
 346         nodes[1].node.claim_funds(payment_preimage);
 347         check_added_monitors!(nodes[1], 1);
 348         expect_payment_claimed!(nodes[1], payment_hash, 3_000_000);
 349
 350         let b_htlc_msgs = get_htlc_update_msgs!(&nodes[1], nodes[0].node.get_our_node_id());
 351         // We claim the dust payment here as well, but it won't impact our claimable balances as its
 352         // dust and thus doesn't appear on chain at all.
 353         nodes[1].node.claim_funds(dust_payment_preimage);
 354         check_added_monitors!(nodes[1], 1);
 355         expect_payment_claimed!(nodes[1], dust_payment_hash, 3_000);
 356
 357         nodes[1].node.claim_funds(timeout_payment_preimage);
 358         check_added_monitors!(nodes[1], 1);
 359         expect_payment_claimed!(nodes[1], timeout_payment_hash, 4_000_000);
 360
 361         if prev_commitment_tx {
 362                 // To build a previous commitment transaction, deliver one round of commitment messages.
 363                 nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &b_htlc_msgs.update_fulfill_htlcs[0]);
 364                 expect_payment_sent_without_paths!(nodes[0], payment_preimage);
 365                 nodes[0].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &b_htlc_msgs.commitment_signed);
 366                 check_added_monitors!(nodes[0], 1);
 367                 let (as_raa, as_cs) = get_revoke_commit_msgs!(nodes[0], nodes[1].node.get_our_node_id());
 368                 nodes[1].node.handle_revoke_and_ack(&nodes[0].node.get_our_node_id(), &as_raa);
 369                 let _htlc_updates = get_htlc_update_msgs!(&nodes[1], nodes[0].node.get_our_node_id());
 370                 check_added_monitors!(nodes[1], 1);
 371                 nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &as_cs);
 372                 let _bs_raa = get_event_msg!(nodes[1], MessageSendEvent::SendRevokeAndACK, nodes[0].node.get_our_node_id());
 373                 check_added_monitors!(nodes[1], 1);
 374         }
 375
 376         // Once B has received the payment preimage, it includes the value of the HTLC in its
 377         // "claimable if you were to close the channel" balance.
 378         let mut a_expected_balances = vec![Balance::ClaimableOnChannelClose {
 379                         claimable_amount_satoshis: 1_000_000 - // Channel funding value in satoshis
 380                                 4_000 - // The to-be-failed HTLC value in satoshis
 381                                 3_000 - // The claimed HTLC value in satoshis
 382                                 1_000 - // The push_msat value in satoshis
 383                                 3 - // The dust HTLC value in satoshis
 384                                 // The commitment transaction fee with two HTLC outputs:
 385                                 chan_feerate * (channel::commitment_tx_base_weight(&channel_type_features) +
 386                                                                 if prev_commitment_tx { 1 } else { 2 } *
 387                                                                 channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 388                 }, sent_htlc_timeout_balance.clone()];
 389         if !prev_commitment_tx {
 390                 a_expected_balances.push(sent_htlc_balance.clone());
 391         }
 392         assert_eq!(sorted_vec(a_expected_balances),
 393                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 394         assert_eq!(vec![Balance::ClaimableOnChannelClose {
 395                         claimable_amount_satoshis: 1_000 + 3_000 + 4_000,
 396                 }],
 397                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 398
 399         // Broadcast the closing transaction (which has both pending HTLCs in it) and get B's
 400         // broadcasted HTLC claim transaction with preimage.
 401         let node_b_commitment_claimable = nodes[1].best_block_info().1 + BREAKDOWN_TIMEOUT as u32;
 402         mine_transaction(&nodes[0], &remote_txn[0]);
 403         mine_transaction(&nodes[1], &remote_txn[0]);
 404
 405         let b_broadcast_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 406         assert_eq!(b_broadcast_txn.len(), 2);
 407         // b_broadcast_txn should spend the HTLCs output of the commitment tx for 3_000 and 4_000 sats
 408         check_spends!(b_broadcast_txn[0], remote_txn[0]);
 409         check_spends!(b_broadcast_txn[1], remote_txn[0]);
 410         assert_eq!(b_broadcast_txn[0].input.len(), 1);
 411         assert_eq!(b_broadcast_txn[1].input.len(), 1);
 412         assert_eq!(remote_txn[0].output[b_broadcast_txn[0].input[0].previous_output.vout as usize].value, 3_000);
 413         assert_eq!(remote_txn[0].output[b_broadcast_txn[1].input[0].previous_output.vout as usize].value, 4_000);
 414
 415         assert!(nodes[0].node.list_channels().is_empty());
 416         check_closed_broadcast!(nodes[0], true);
 417         check_added_monitors!(nodes[0], 1);
 418         check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed);
 419         assert!(nodes[1].node.list_channels().is_empty());
 420         check_closed_broadcast!(nodes[1], true);
 421         check_added_monitors!(nodes[1], 1);
 422         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
 423         assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
 424         assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 425
 426         // Once the commitment transaction confirms, we will wait until ANTI_REORG_DELAY until we
 427         // generate any `SpendableOutputs` events. Thus, the same balances will still be listed
 428         // available in `get_claimable_balances`. However, both will swap from `ClaimableOnClose` to
 429         // other Balance variants, as close has already happened.
 430         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 431         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 432
 433         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 434                         claimable_amount_satoshis: 1_000_000 - 3_000 - 4_000 - 1_000 - 3 - chan_feerate *
 435                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 436                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1,
 437                 }, sent_htlc_balance.clone(), sent_htlc_timeout_balance.clone()]),
 438                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 439         // The main non-HTLC balance is just awaiting confirmations, but the claimable height is the
 440         // CSV delay, not ANTI_REORG_DELAY.
 441         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 442                         claimable_amount_satoshis: 1_000,
 443                         confirmation_height: node_b_commitment_claimable,
 444                 },
 445                 // Both HTLC balances are "contentious" as our counterparty could claim them if we wait too
 446                 // long.
 447                 received_htlc_claiming_balance.clone(), received_htlc_timeout_claiming_balance.clone()]),
 448                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 449
 450         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
 451         expect_payment_failed!(nodes[0], dust_payment_hash, false);
 452         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 453
 454         // After ANTI_REORG_DELAY, A will consider its balance fully spendable and generate a
 455         // `SpendableOutputs` event. However, B still has to wait for the CSV delay.
 456         assert_eq!(sorted_vec(vec![sent_htlc_balance.clone(), sent_htlc_timeout_balance.clone()]),
 457                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 458         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 459                         claimable_amount_satoshis: 1_000,
 460                         confirmation_height: node_b_commitment_claimable,
 461                 }, received_htlc_claiming_balance.clone(), received_htlc_timeout_claiming_balance.clone()]),
 462                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 463
 464         test_spendable_output(&nodes[0], &remote_txn[0]);
 465         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 466
 467         // After broadcasting the HTLC claim transaction, node A will still consider the HTLC
 468         // possibly-claimable up to ANTI_REORG_DELAY, at which point it will drop it.
 469         mine_transaction(&nodes[0], &b_broadcast_txn[0]);
 470         if prev_commitment_tx {
 471                 expect_payment_path_successful!(nodes[0]);
 472         } else {
 473                 expect_payment_sent!(nodes[0], payment_preimage);
 474         }
 475         assert_eq!(sorted_vec(vec![sent_htlc_balance.clone(), sent_htlc_timeout_balance.clone()]),
 476                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 477         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
 478         assert_eq!(vec![sent_htlc_timeout_balance.clone()],
 479                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 480
 481         // When the HTLC timeout output is spendable in the next block, A should broadcast it
 482         connect_blocks(&nodes[0], htlc_cltv_timeout - nodes[0].best_block_info().1);
 483         let a_broadcast_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 484         assert_eq!(a_broadcast_txn.len(), 2);
 485         assert_eq!(a_broadcast_txn[0].input.len(), 1);
 486         check_spends!(a_broadcast_txn[0], remote_txn[0]);
 487         assert_eq!(a_broadcast_txn[1].input.len(), 1);
 488         check_spends!(a_broadcast_txn[1], remote_txn[0]);
 489         assert_ne!(a_broadcast_txn[0].input[0].previous_output.vout,
 490                    a_broadcast_txn[1].input[0].previous_output.vout);
 491         // a_broadcast_txn [0] and [1] should spend the HTLC outputs of the commitment tx
 492         assert_eq!(remote_txn[0].output[a_broadcast_txn[0].input[0].previous_output.vout as usize].value, 3_000);
 493         assert_eq!(remote_txn[0].output[a_broadcast_txn[1].input[0].previous_output.vout as usize].value, 4_000);
 494
 495         // Once the HTLC-Timeout transaction confirms, A will no longer consider the HTLC
 496         // "MaybeClaimable", but instead move it to "AwaitingConfirmations".
 497         mine_transaction(&nodes[0], &a_broadcast_txn[1]);
 498         assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
 499         assert_eq!(vec![Balance::ClaimableAwaitingConfirmations {
 500                         claimable_amount_satoshis: 4_000,
 501                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1,
 502                 }],
 503                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 504         // After ANTI_REORG_DELAY, A will generate a SpendableOutputs event and drop the claimable
 505         // balance entry.
 506         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
 507         assert_eq!(Vec::<Balance>::new(),
 508                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 509         expect_payment_failed!(nodes[0], timeout_payment_hash, false);
 510
 511         test_spendable_output(&nodes[0], &a_broadcast_txn[1]);
 512
 513         // Node B will no longer consider the HTLC "contentious" after the HTLC claim transaction
 514         // confirms, and consider it simply "awaiting confirmations". Note that it has to wait for the
 515         // standard revocable transaction CSV delay before receiving a `SpendableOutputs`.
 516         let node_b_htlc_claimable = nodes[1].best_block_info().1 + BREAKDOWN_TIMEOUT as u32;
 517         mine_transaction(&nodes[1], &b_broadcast_txn[0]);
 518
 519         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 520                         claimable_amount_satoshis: 1_000,
 521                         confirmation_height: node_b_commitment_claimable,
 522                 }, Balance::ClaimableAwaitingConfirmations {
 523                         claimable_amount_satoshis: 3_000,
 524                         confirmation_height: node_b_htlc_claimable,
 525                 }, received_htlc_timeout_claiming_balance.clone()]),
 526                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 527
 528         // After reaching the commitment output CSV, we'll get a SpendableOutputs event for it and have
 529         // only the HTLCs claimable on node B.
 530         connect_blocks(&nodes[1], node_b_commitment_claimable - nodes[1].best_block_info().1);
 531         test_spendable_output(&nodes[1], &remote_txn[0]);
 532
 533         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 534                         claimable_amount_satoshis: 3_000,
 535                         confirmation_height: node_b_htlc_claimable,
 536                 }, received_htlc_timeout_claiming_balance.clone()]),
 537                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 538
 539         // After reaching the claimed HTLC output CSV, we'll get a SpendableOutptus event for it and
 540         // have only one HTLC output left spendable.
 541         connect_blocks(&nodes[1], node_b_htlc_claimable - nodes[1].best_block_info().1);
 542         test_spendable_output(&nodes[1], &b_broadcast_txn[0]);
 543
 544         assert_eq!(vec![received_htlc_timeout_claiming_balance.clone()],
 545                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 546
 547         // Finally, mine the HTLC timeout transaction that A broadcasted (even though B should be able
 548         // to claim this HTLC with the preimage it knows!). It will remain listed as a claimable HTLC
 549         // until ANTI_REORG_DELAY confirmations on the spend.
 550         mine_transaction(&nodes[1], &a_broadcast_txn[1]);
 551         assert_eq!(vec![received_htlc_timeout_claiming_balance.clone()],
 552                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 553         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 554         assert_eq!(Vec::<Balance>::new(),
 555                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 556
 557         // Ensure that even if we connect more blocks, potentially replaying the entire chain if we're
 558         // using `ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks`, we don't get new
 559         // monitor events or claimable balances.
 560         for node in nodes.iter() {
 561                 connect_blocks(node, 6);
 562                 connect_blocks(node, 6);
 563                 assert!(node.chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 564                 assert!(node.chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
 565         }
 566 }
 567
 568 #[test]
 569 fn test_claim_value_force_close() {
 570         do_test_claim_value_force_close(true);
 571         do_test_claim_value_force_close(false);
 572 }
 573
 574 #[test]
 575 fn test_balances_on_local_commitment_htlcs() {
 576         // Previously, when handling the broadcast of a local commitment transactions (with associated
 577         // CSV delays prior to spendability), we incorrectly handled the CSV delays on HTLC
 578         // transactions. This caused us to miss spendable outputs for HTLCs which were awaiting a CSV
 579         // delay prior to spendability.
 580         //
 581         // Further, because of this, we could hit an assertion as `get_claimable_balances` asserted
 582         // that HTLCs were resolved after the funding spend was resolved, which was not true if the
 583         // HTLC did not have a CSV delay attached (due to the above bug or due to it being an HTLC
 584         // claim by our counterparty).
 585         let chanmon_cfgs = create_chanmon_cfgs(2);
 586         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 587         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 588         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 589
 590         // Create a single channel with two pending HTLCs from nodes[0] to nodes[1], one which nodes[1]
 591         // knows the preimage for, one which it does not.
 592         let (_, _, chan_id, funding_tx) = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 0);
 593         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
 594
 595         let (route, payment_hash, _, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[1], 10_000_000);
 596         let htlc_cltv_timeout = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
 597         nodes[0].node.send_payment_with_route(&route, payment_hash,
 598                 RecipientOnionFields::secret_only(payment_secret), PaymentId(payment_hash.0)).unwrap();
 599         check_added_monitors!(nodes[0], 1);
 600
 601         let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
 602         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
 603         commitment_signed_dance!(nodes[1], nodes[0], updates.commitment_signed, false);
 604
 605         expect_pending_htlcs_forwardable!(nodes[1]);
 606         expect_payment_claimable!(nodes[1], payment_hash, payment_secret, 10_000_000);
 607
 608         let (route_2, payment_hash_2, payment_preimage_2, payment_secret_2) = get_route_and_payment_hash!(nodes[0], nodes[1], 20_000_000);
 609         nodes[0].node.send_payment_with_route(&route_2, payment_hash_2,
 610                 RecipientOnionFields::secret_only(payment_secret_2), PaymentId(payment_hash_2.0)).unwrap();
 611         check_added_monitors!(nodes[0], 1);
 612
 613         let updates = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
 614         nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
 615         commitment_signed_dance!(nodes[1], nodes[0], updates.commitment_signed, false);
 616
 617         expect_pending_htlcs_forwardable!(nodes[1]);
 618         expect_payment_claimable!(nodes[1], payment_hash_2, payment_secret_2, 20_000_000);
 619         nodes[1].node.claim_funds(payment_preimage_2);
 620         get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
 621         check_added_monitors!(nodes[1], 1);
 622         expect_payment_claimed!(nodes[1], payment_hash_2, 20_000_000);
 623
 624         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
 625         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
 626
 627         // Get nodes[0]'s commitment transaction and HTLC-Timeout transactions
 628         let as_txn = get_local_commitment_txn!(nodes[0], chan_id);
 629         assert_eq!(as_txn.len(), 3);
 630         check_spends!(as_txn[1], as_txn[0]);
 631         check_spends!(as_txn[2], as_txn[0]);
 632         check_spends!(as_txn[0], funding_tx);
 633
 634         // First confirm the commitment transaction on nodes[0], which should leave us with three
 635         // claimable balances.
 636         let node_a_commitment_claimable = nodes[0].best_block_info().1 + BREAKDOWN_TIMEOUT as u32;
 637         mine_transaction(&nodes[0], &as_txn[0]);
 638         check_added_monitors!(nodes[0], 1);
 639         check_closed_broadcast!(nodes[0], true);
 640         check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed);
 641
 642         let htlc_balance_known_preimage = Balance::MaybeTimeoutClaimableHTLC {
 643                 claimable_amount_satoshis: 10_000,
 644                 claimable_height: htlc_cltv_timeout,
 645                 payment_hash,
 646         };
 647         let htlc_balance_unknown_preimage = Balance::MaybeTimeoutClaimableHTLC {
 648                 claimable_amount_satoshis: 20_000,
 649                 claimable_height: htlc_cltv_timeout,
 650                 payment_hash: payment_hash_2,
 651         };
 652
 653         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 654                         claimable_amount_satoshis: 1_000_000 - 10_000 - 20_000 - chan_feerate *
 655                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 656                         confirmation_height: node_a_commitment_claimable,
 657                 }, htlc_balance_known_preimage.clone(), htlc_balance_unknown_preimage.clone()]),
 658                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 659
 660         // Get nodes[1]'s HTLC claim tx for the second HTLC
 661         mine_transaction(&nodes[1], &as_txn[0]);
 662         check_added_monitors!(nodes[1], 1);
 663         check_closed_broadcast!(nodes[1], true);
 664         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
 665         let bs_htlc_claim_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 666         assert_eq!(bs_htlc_claim_txn.len(), 1);
 667         check_spends!(bs_htlc_claim_txn[0], as_txn[0]);
 668
 669         // Connect blocks until the HTLCs expire, allowing us to (validly) broadcast the HTLC-Timeout
 670         // transaction.
 671         connect_blocks(&nodes[0], TEST_FINAL_CLTV - 1);
 672         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 673                         claimable_amount_satoshis: 1_000_000 - 10_000 - 20_000 - chan_feerate *
 674                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 675                         confirmation_height: node_a_commitment_claimable,
 676                 }, htlc_balance_known_preimage.clone(), htlc_balance_unknown_preimage.clone()]),
 677                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 678         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
 679
 680         // Now confirm nodes[0]'s HTLC-Timeout transaction, which changes the claimable balance to an
 681         // "awaiting confirmations" one.
 682         let node_a_htlc_claimable = nodes[0].best_block_info().1 + BREAKDOWN_TIMEOUT as u32;
 683         mine_transaction(&nodes[0], &as_txn[1]);
 684         // Note that prior to the fix in the commit which introduced this test, this (and the next
 685         // balance) check failed. With this check removed, the code panicked in the `connect_blocks`
 686         // call, as described, two hunks down.
 687         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 688                         claimable_amount_satoshis: 1_000_000 - 10_000 - 20_000 - chan_feerate *
 689                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 690                         confirmation_height: node_a_commitment_claimable,
 691                 }, Balance::ClaimableAwaitingConfirmations {
 692                         claimable_amount_satoshis: 10_000,
 693                         confirmation_height: node_a_htlc_claimable,
 694                 }, htlc_balance_unknown_preimage.clone()]),
 695                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 696
 697         // Now confirm nodes[1]'s HTLC claim, giving nodes[0] the preimage. Note that the "maybe
 698         // claimable" balance remains until we see ANTI_REORG_DELAY blocks.
 699         mine_transaction(&nodes[0], &bs_htlc_claim_txn[0]);
 700         expect_payment_sent!(nodes[0], payment_preimage_2);
 701         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 702                         claimable_amount_satoshis: 1_000_000 - 10_000 - 20_000 - chan_feerate *
 703                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 704                         confirmation_height: node_a_commitment_claimable,
 705                 }, Balance::ClaimableAwaitingConfirmations {
 706                         claimable_amount_satoshis: 10_000,
 707                         confirmation_height: node_a_htlc_claimable,
 708                 }, htlc_balance_unknown_preimage.clone()]),
 709                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 710
 711         // Finally make the HTLC transactions have ANTI_REORG_DELAY blocks. This call previously
 712         // panicked as described in the test introduction. This will remove the "maybe claimable"
 713         // spendable output as nodes[1] has fully claimed the second HTLC.
 714         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
 715         expect_payment_failed!(nodes[0], payment_hash, false);
 716
 717         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 718                         claimable_amount_satoshis: 1_000_000 - 10_000 - 20_000 - chan_feerate *
 719                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 720                         confirmation_height: node_a_commitment_claimable,
 721                 }, Balance::ClaimableAwaitingConfirmations {
 722                         claimable_amount_satoshis: 10_000,
 723                         confirmation_height: node_a_htlc_claimable,
 724                 }]),
 725                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 726
 727         // Connect blocks until the commitment transaction's CSV expires, providing us the relevant
 728         // `SpendableOutputs` event and removing the claimable balance entry.
 729         connect_blocks(&nodes[0], node_a_commitment_claimable - nodes[0].best_block_info().1);
 730         assert_eq!(vec![Balance::ClaimableAwaitingConfirmations {
 731                         claimable_amount_satoshis: 10_000,
 732                         confirmation_height: node_a_htlc_claimable,
 733                 }],
 734                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 735         test_spendable_output(&nodes[0], &as_txn[0]);
 736
 737         // Connect blocks until the HTLC-Timeout's CSV expires, providing us the relevant
 738         // `SpendableOutputs` event and removing the claimable balance entry.
 739         connect_blocks(&nodes[0], node_a_htlc_claimable - nodes[0].best_block_info().1);
 740         assert!(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
 741         test_spendable_output(&nodes[0], &as_txn[1]);
 742
 743         // Ensure that even if we connect more blocks, potentially replaying the entire chain if we're
 744         // using `ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks`, we don't get new
 745         // monitor events or claimable balances.
 746         connect_blocks(&nodes[0], 6);
 747         connect_blocks(&nodes[0], 6);
 748         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 749         assert!(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
 750 }
 751
 752 #[test]
 753 fn test_no_preimage_inbound_htlc_balances() {
 754         // Tests that MaybePreimageClaimableHTLC are generated for inbound HTLCs for which we do not
 755         // have a preimage.
 756         let chanmon_cfgs = create_chanmon_cfgs(2);
 757         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 758         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 759         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 760
 761         let (_, _, chan_id, funding_tx) = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 500_000_000);
 762         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
 763
 764         // Send two HTLCs, one from A to B, and one from B to A.
 765         let to_b_failed_payment_hash = route_payment(&nodes[0], &[&nodes[1]], 10_000_000).1;
 766         let to_a_failed_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 20_000_000).1;
 767         let htlc_cltv_timeout = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
 768
 769         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
 770         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
 771
 772         let a_sent_htlc_balance = Balance::MaybeTimeoutClaimableHTLC {
 773                 claimable_amount_satoshis: 10_000,
 774                 claimable_height: htlc_cltv_timeout,
 775                 payment_hash: to_b_failed_payment_hash,
 776         };
 777         let a_received_htlc_balance = Balance::MaybePreimageClaimableHTLC {
 778                 claimable_amount_satoshis: 20_000,
 779                 expiry_height: htlc_cltv_timeout,
 780                 payment_hash: to_a_failed_payment_hash,
 781         };
 782         let b_received_htlc_balance = Balance::MaybePreimageClaimableHTLC {
 783                 claimable_amount_satoshis: 10_000,
 784                 expiry_height: htlc_cltv_timeout,
 785                 payment_hash: to_b_failed_payment_hash,
 786         };
 787         let b_sent_htlc_balance = Balance::MaybeTimeoutClaimableHTLC {
 788                 claimable_amount_satoshis: 20_000,
 789                 claimable_height: htlc_cltv_timeout,
 790                 payment_hash: to_a_failed_payment_hash,
 791         };
 792
 793         // Both A and B will have an HTLC that's claimable on timeout and one that's claimable if they
 794         // receive the preimage. These will remain the same through the channel closure and until the
 795         // HTLC output is spent.
 796
 797         assert_eq!(sorted_vec(vec![Balance::ClaimableOnChannelClose {
 798                         claimable_amount_satoshis: 1_000_000 - 500_000 - 10_000 - chan_feerate *
 799                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 800                 }, a_received_htlc_balance.clone(), a_sent_htlc_balance.clone()]),
 801                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 802
 803         assert_eq!(sorted_vec(vec![Balance::ClaimableOnChannelClose {
 804                         claimable_amount_satoshis: 500_000 - 20_000,
 805                 }, b_received_htlc_balance.clone(), b_sent_htlc_balance.clone()]),
 806                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 807
 808         // Get nodes[0]'s commitment transaction and HTLC-Timeout transaction
 809         let as_txn = get_local_commitment_txn!(nodes[0], chan_id);
 810         assert_eq!(as_txn.len(), 2);
 811         check_spends!(as_txn[1], as_txn[0]);
 812         check_spends!(as_txn[0], funding_tx);
 813
 814         // Now close the channel by confirming A's commitment transaction on both nodes, checking the
 815         // claimable balances remain the same except for the non-HTLC balance changing variant.
 816         let node_a_commitment_claimable = nodes[0].best_block_info().1 + BREAKDOWN_TIMEOUT as u32;
 817         let as_pre_spend_claims = sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 818                         claimable_amount_satoshis: 1_000_000 - 500_000 - 10_000 - chan_feerate *
 819                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 820                         confirmation_height: node_a_commitment_claimable,
 821                 }, a_received_htlc_balance.clone(), a_sent_htlc_balance.clone()]);
 822
 823         mine_transaction(&nodes[0], &as_txn[0]);
 824         nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
 825         check_added_monitors!(nodes[0], 1);
 826         check_closed_broadcast!(nodes[0], true);
 827         check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed);
 828
 829         assert_eq!(as_pre_spend_claims,
 830                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 831
 832         mine_transaction(&nodes[1], &as_txn[0]);
 833         check_added_monitors!(nodes[1], 1);
 834         check_closed_broadcast!(nodes[1], true);
 835         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
 836
 837         let node_b_commitment_claimable = nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1;
 838         let mut bs_pre_spend_claims = sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 839                         claimable_amount_satoshis: 500_000 - 20_000,
 840                         confirmation_height: node_b_commitment_claimable,
 841                 }, b_received_htlc_balance.clone(), b_sent_htlc_balance.clone()]);
 842         assert_eq!(bs_pre_spend_claims,
 843                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 844
 845         // We'll broadcast the HTLC-Timeout transaction one block prior to the htlc's expiration (as it
 846         // is confirmable in the next block), but will still include the same claimable balances as no
 847         // HTLC has been spent, even after the HTLC expires. We'll also fail the inbound HTLC, but it
 848         // won't do anything as the channel is already closed.
 849
 850         connect_blocks(&nodes[0], TEST_FINAL_CLTV);
 851         let as_htlc_timeout_claim = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 852         assert_eq!(as_htlc_timeout_claim.len(), 1);
 853         check_spends!(as_htlc_timeout_claim[0], as_txn[0]);
 854         expect_pending_htlcs_forwardable_conditions!(nodes[0],
 855                 [HTLCDestination::FailedPayment { payment_hash: to_a_failed_payment_hash }]);
 856
 857         assert_eq!(as_pre_spend_claims,
 858                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 859
 860         connect_blocks(&nodes[0], 1);
 861         assert_eq!(as_pre_spend_claims,
 862                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 863
 864         // For node B, we'll get the non-HTLC funds claimable after ANTI_REORG_DELAY confirmations
 865         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 866         test_spendable_output(&nodes[1], &as_txn[0]);
 867         bs_pre_spend_claims.retain(|e| if let Balance::ClaimableAwaitingConfirmations { .. } = e { false } else { true });
 868
 869         // The next few blocks for B look the same as for A, though for the opposite HTLC
 870         nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clear();
 871         connect_blocks(&nodes[1], TEST_FINAL_CLTV - (ANTI_REORG_DELAY - 1));
 872         expect_pending_htlcs_forwardable_conditions!(nodes[1],
 873                 [HTLCDestination::FailedPayment { payment_hash: to_b_failed_payment_hash }]);
 874         let bs_htlc_timeout_claim = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
 875         assert_eq!(bs_htlc_timeout_claim.len(), 1);
 876         check_spends!(bs_htlc_timeout_claim[0], as_txn[0]);
 877
 878         assert_eq!(bs_pre_spend_claims,
 879                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 880
 881         connect_blocks(&nodes[1], 1);
 882         assert_eq!(bs_pre_spend_claims,
 883                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 884
 885         // Now confirm the two HTLC timeout transactions for A, checking that the inbound HTLC resolves
 886         // after ANTI_REORG_DELAY confirmations and the other takes BREAKDOWN_TIMEOUT confirmations.
 887         mine_transaction(&nodes[0], &as_htlc_timeout_claim[0]);
 888         let as_timeout_claimable_height = nodes[0].best_block_info().1 + (BREAKDOWN_TIMEOUT as u32) - 1;
 889         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 890                         claimable_amount_satoshis: 1_000_000 - 500_000 - 10_000 - chan_feerate *
 891                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 892                         confirmation_height: node_a_commitment_claimable,
 893                 }, a_received_htlc_balance.clone(), Balance::ClaimableAwaitingConfirmations {
 894                         claimable_amount_satoshis: 10_000,
 895                         confirmation_height: as_timeout_claimable_height,
 896                 }]),
 897                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 898
 899         mine_transaction(&nodes[0], &bs_htlc_timeout_claim[0]);
 900         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 901                         claimable_amount_satoshis: 1_000_000 - 500_000 - 10_000 - chan_feerate *
 902                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 903                         confirmation_height: node_a_commitment_claimable,
 904                 }, a_received_htlc_balance.clone(), Balance::ClaimableAwaitingConfirmations {
 905                         claimable_amount_satoshis: 10_000,
 906                         confirmation_height: as_timeout_claimable_height,
 907                 }]),
 908                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 909
 910         // Once as_htlc_timeout_claim[0] reaches ANTI_REORG_DELAY confirmations, we should get a
 911         // payment failure event.
 912         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 2);
 913         expect_payment_failed!(nodes[0], to_b_failed_payment_hash, false);
 914
 915         connect_blocks(&nodes[0], 1);
 916         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
 917                         claimable_amount_satoshis: 1_000_000 - 500_000 - 10_000 - chan_feerate *
 918                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
 919                         confirmation_height: node_a_commitment_claimable,
 920                 }, Balance::ClaimableAwaitingConfirmations {
 921                         claimable_amount_satoshis: 10_000,
 922                         confirmation_height: core::cmp::max(as_timeout_claimable_height, htlc_cltv_timeout),
 923                 }]),
 924                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 925
 926         connect_blocks(&nodes[0], node_a_commitment_claimable - nodes[0].best_block_info().1);
 927         assert_eq!(vec![Balance::ClaimableAwaitingConfirmations {
 928                         claimable_amount_satoshis: 10_000,
 929                         confirmation_height: core::cmp::max(as_timeout_claimable_height, htlc_cltv_timeout),
 930                 }],
 931                 nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 932         test_spendable_output(&nodes[0], &as_txn[0]);
 933
 934         connect_blocks(&nodes[0], as_timeout_claimable_height - nodes[0].best_block_info().1);
 935         assert!(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
 936         test_spendable_output(&nodes[0], &as_htlc_timeout_claim[0]);
 937
 938         // The process for B should be completely identical as well, noting that the non-HTLC-balance
 939         // was already claimed.
 940         mine_transaction(&nodes[1], &bs_htlc_timeout_claim[0]);
 941         let bs_timeout_claimable_height = nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1;
 942         assert_eq!(sorted_vec(vec![b_received_htlc_balance.clone(), Balance::ClaimableAwaitingConfirmations {
 943                         claimable_amount_satoshis: 20_000,
 944                         confirmation_height: bs_timeout_claimable_height,
 945                 }]),
 946                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 947
 948         mine_transaction(&nodes[1], &as_htlc_timeout_claim[0]);
 949         assert_eq!(sorted_vec(vec![b_received_htlc_balance.clone(), Balance::ClaimableAwaitingConfirmations {
 950                         claimable_amount_satoshis: 20_000,
 951                         confirmation_height: bs_timeout_claimable_height,
 952                 }]),
 953                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
 954
 955         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
 956         expect_payment_failed!(nodes[1], to_a_failed_payment_hash, false);
 957
 958         assert_eq!(vec![b_received_htlc_balance.clone()],
 959                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
 960         test_spendable_output(&nodes[1], &bs_htlc_timeout_claim[0]);
 961
 962         connect_blocks(&nodes[1], 1);
 963         assert!(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
 964
 965         // Ensure that even if we connect more blocks, potentially replaying the entire chain if we're
 966         // using `ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks`, we don't get new
 967         // monitor events or claimable balances.
 968         connect_blocks(&nodes[1], 6);
 969         connect_blocks(&nodes[1], 6);
 970         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
 971         assert!(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
 972 }
 973
 974 fn sorted_vec_with_additions<T: Ord + Clone>(v_orig: &Vec<T>, extra_ts: &[&T]) -> Vec<T> {
 975         let mut v = v_orig.clone();
 976         for t in extra_ts {
 977                 v.push((*t).clone());
 978         }
 979         v.sort_unstable();
 980         v
 981 }
 982
 983 fn do_test_revoked_counterparty_commitment_balances(confirm_htlc_spend_first: bool) {
 984         // Tests `get_claimable_balances` for revoked counterparty commitment transactions.
 985         let mut chanmon_cfgs = create_chanmon_cfgs(2);
 986         // We broadcast a second-to-latest commitment transaction, without providing the revocation
 987         // secret to the counterparty. However, because we always immediately take the revocation
 988         // secret from the keys_manager, we would panic at broadcast as we're trying to sign a
 989         // transaction which, from the point of view of our keys_manager, is revoked.
 990         chanmon_cfgs[1].keys_manager.disable_revocation_policy_check = true;
 991         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 992         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
 993         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 994
 995         let (_, _, chan_id, funding_tx) =
 996                 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 100_000_000);
 997         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
 998         assert_eq!(funding_outpoint.to_channel_id(), chan_id);
 999
1000         // We create five HTLCs for B to claim against A's revoked commitment transaction:
1001         //
1002         // (1) one for which A is the originator and B knows the preimage
1003         // (2) one for which B is the originator where the HTLC has since timed-out
1004         // (3) one for which B is the originator but where the HTLC has not yet timed-out
1005         // (4) one dust HTLC which is lost in the channel closure
1006         // (5) one that actually isn't in the revoked commitment transaction at all, but was added in
1007         //     later commitment transaction updates
1008         //
1009         // Though they could all be claimed in a single claim transaction, due to CLTV timeouts they
1010         // are all currently claimed in separate transactions, which helps us test as we can claim
1011         // HTLCs individually.
1012
1013         let (claimed_payment_preimage, claimed_payment_hash, ..) = route_payment(&nodes[0], &[&nodes[1]], 3_000_000);
1014         let timeout_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 4_000_000).1;
1015         let dust_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 3_000).1;
1016
1017         let htlc_cltv_timeout = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
1018
1019         connect_blocks(&nodes[0], 10);
1020         connect_blocks(&nodes[1], 10);
1021
1022         let live_htlc_cltv_timeout = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
1023         let live_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 5_000_000).1;
1024
1025         // Get the latest commitment transaction from A and then update the fee to revoke it
1026         let as_revoked_txn = get_local_commitment_txn!(nodes[0], chan_id);
1027         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
1028
1029         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
1030
1031         let missing_htlc_cltv_timeout = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
1032         let missing_htlc_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 2_000_000).1;
1033
1034         nodes[1].node.claim_funds(claimed_payment_preimage);
1035         expect_payment_claimed!(nodes[1], claimed_payment_hash, 3_000_000);
1036         check_added_monitors!(nodes[1], 1);
1037         let _b_htlc_msgs = get_htlc_update_msgs!(&nodes[1], nodes[0].node.get_our_node_id());
1038
1039         connect_blocks(&nodes[0], htlc_cltv_timeout + 1 - 10);
1040         check_closed_broadcast!(nodes[0], true);
1041         check_added_monitors!(nodes[0], 1);
1042
1043         let mut events = nodes[0].node.get_and_clear_pending_events();
1044         assert_eq!(events.len(), 6);
1045         let mut failed_payments: HashSet<_> =
1046                 [timeout_payment_hash, dust_payment_hash, live_payment_hash, missing_htlc_payment_hash]
1047                 .iter().map(|a| *a).collect();
1048         events.retain(|ev| {
1049                 match ev {
1050                         Event::HTLCHandlingFailed { failed_next_destination: HTLCDestination::NextHopChannel { node_id, channel_id }, .. } => {
1051                                 assert_eq!(*channel_id, chan_id);
1052                                 assert_eq!(*node_id, Some(nodes[1].node.get_our_node_id()));
1053                                 false
1054                         },
1055                         Event::HTLCHandlingFailed { failed_next_destination: HTLCDestination::FailedPayment { payment_hash }, .. } => {
1056                                 assert!(failed_payments.remove(payment_hash));
1057                                 false
1058                         },
1059                         _ => true,
1060                 }
1061         });
1062         assert!(failed_payments.is_empty());
1063         if let Event::PendingHTLCsForwardable { .. } = events[0] {} else { panic!(); }
1064         match &events[1] {
1065                 Event::ChannelClosed { reason: ClosureReason::CommitmentTxConfirmed, .. } => {},
1066                 _ => panic!(),
1067         }
1068
1069         connect_blocks(&nodes[1], htlc_cltv_timeout + 1 - 10);
1070         check_closed_broadcast!(nodes[1], true);
1071         check_added_monitors!(nodes[1], 1);
1072         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
1073
1074         // Prior to channel closure, B considers the preimage HTLC as its own, and otherwise only
1075         // lists the two on-chain timeout-able HTLCs as claimable balances.
1076         assert_eq!(sorted_vec(vec![Balance::ClaimableOnChannelClose {
1077                         claimable_amount_satoshis: 100_000 - 5_000 - 4_000 - 3 - 2_000 + 3_000,
1078                 }, Balance::MaybeTimeoutClaimableHTLC {
1079                         claimable_amount_satoshis: 2_000,
1080                         claimable_height: missing_htlc_cltv_timeout,
1081                         payment_hash: missing_htlc_payment_hash,
1082                 }, Balance::MaybeTimeoutClaimableHTLC {
1083                         claimable_amount_satoshis: 4_000,
1084                         claimable_height: htlc_cltv_timeout,
1085                         payment_hash: timeout_payment_hash,
1086                 }, Balance::MaybeTimeoutClaimableHTLC {
1087                         claimable_amount_satoshis: 5_000,
1088                         claimable_height: live_htlc_cltv_timeout,
1089                         payment_hash: live_payment_hash,
1090                 }]),
1091                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1092
1093         mine_transaction(&nodes[1], &as_revoked_txn[0]);
1094         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();
1095         // Currently the revoked commitment is claimed in four transactions as the HTLCs all expire
1096         // quite soon.
1097         assert_eq!(claim_txn.len(), 4);
1098         claim_txn.sort_unstable_by_key(|tx| tx.output.iter().map(|output| output.value).sum::<u64>());
1099
1100         // The following constants were determined experimentally
1101         const BS_TO_SELF_CLAIM_EXP_WEIGHT: usize = 483;
1102         const OUTBOUND_HTLC_CLAIM_EXP_WEIGHT: usize = 571;
1103         const INBOUND_HTLC_CLAIM_EXP_WEIGHT: usize = 578;
1104
1105         // Check that the weight is close to the expected weight. Note that signature sizes vary
1106         // somewhat so it may not always be exact.
1107         fuzzy_assert_eq(claim_txn[0].weight(), OUTBOUND_HTLC_CLAIM_EXP_WEIGHT);
1108         fuzzy_assert_eq(claim_txn[1].weight(), INBOUND_HTLC_CLAIM_EXP_WEIGHT);
1109         fuzzy_assert_eq(claim_txn[2].weight(), INBOUND_HTLC_CLAIM_EXP_WEIGHT);
1110         fuzzy_assert_eq(claim_txn[3].weight(), BS_TO_SELF_CLAIM_EXP_WEIGHT);
1111
1112         // The expected balance for the next three checks, with the largest-HTLC and to_self output
1113         // claim balances separated out.
1114         let expected_balance = vec![Balance::ClaimableAwaitingConfirmations {
1115                         // to_remote output in A's revoked commitment
1116                         claimable_amount_satoshis: 100_000 - 5_000 - 4_000 - 3,
1117                         confirmation_height: nodes[1].best_block_info().1 + 5,
1118                 }, Balance::CounterpartyRevokedOutputClaimable {
1119                         claimable_amount_satoshis: 3_000,
1120                 }, Balance::CounterpartyRevokedOutputClaimable {
1121                         claimable_amount_satoshis: 4_000,
1122                 }];
1123
1124         let to_self_unclaimed_balance = Balance::CounterpartyRevokedOutputClaimable {
1125                 claimable_amount_satoshis: 1_000_000 - 100_000 - 3_000 - chan_feerate *
1126                         (channel::commitment_tx_base_weight(&channel_type_features) + 3 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1127         };
1128         let to_self_claimed_avail_height;
1129         let largest_htlc_unclaimed_balance = Balance::CounterpartyRevokedOutputClaimable {
1130                 claimable_amount_satoshis: 5_000,
1131         };
1132         let largest_htlc_claimed_avail_height;
1133
1134         // Once the channel has been closed by A, B now considers all of the commitment transactions'
1135         // outputs as `CounterpartyRevokedOutputClaimable`.
1136         assert_eq!(sorted_vec_with_additions(&expected_balance, &[&to_self_unclaimed_balance, &largest_htlc_unclaimed_balance]),
1137                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1138
1139         if confirm_htlc_spend_first {
1140                 mine_transaction(&nodes[1], &claim_txn[2]);
1141                 largest_htlc_claimed_avail_height = nodes[1].best_block_info().1 + 5;
1142                 to_self_claimed_avail_height = nodes[1].best_block_info().1 + 6; // will be claimed in the next block
1143         } else {
1144                 // Connect the to_self output claim, taking all of A's non-HTLC funds
1145                 mine_transaction(&nodes[1], &claim_txn[3]);
1146                 to_self_claimed_avail_height = nodes[1].best_block_info().1 + 5;
1147                 largest_htlc_claimed_avail_height = nodes[1].best_block_info().1 + 6; // will be claimed in the next block
1148         }
1149
1150         let largest_htlc_claimed_balance = Balance::ClaimableAwaitingConfirmations {
1151                 claimable_amount_satoshis: 5_000 - chan_feerate * INBOUND_HTLC_CLAIM_EXP_WEIGHT as u64 / 1000,
1152                 confirmation_height: largest_htlc_claimed_avail_height,
1153         };
1154         let to_self_claimed_balance = Balance::ClaimableAwaitingConfirmations {
1155                 claimable_amount_satoshis: 1_000_000 - 100_000 - 3_000 - chan_feerate *
1156                         (channel::commitment_tx_base_weight(&channel_type_features) + 3 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000
1157                         - chan_feerate * claim_txn[3].weight() as u64 / 1000,
1158                 confirmation_height: to_self_claimed_avail_height,
1159         };
1160
1161         if confirm_htlc_spend_first {
1162                 assert_eq!(sorted_vec_with_additions(&expected_balance, &[&to_self_unclaimed_balance, &largest_htlc_claimed_balance]),
1163                         sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1164         } else {
1165                 assert_eq!(sorted_vec_with_additions(&expected_balance, &[&to_self_claimed_balance, &largest_htlc_unclaimed_balance]),
1166                         sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1167         }
1168
1169         if confirm_htlc_spend_first {
1170                 mine_transaction(&nodes[1], &claim_txn[3]);
1171         } else {
1172                 mine_transaction(&nodes[1], &claim_txn[2]);
1173         }
1174         assert_eq!(sorted_vec_with_additions(&expected_balance, &[&to_self_claimed_balance, &largest_htlc_claimed_balance]),
1175                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1176
1177         // Finally, connect the last two remaining HTLC spends and check that they move to
1178         // `ClaimableAwaitingConfirmations`
1179         mine_transaction(&nodes[1], &claim_txn[0]);
1180         mine_transaction(&nodes[1], &claim_txn[1]);
1181
1182         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
1183                         // to_remote output in A's revoked commitment
1184                         claimable_amount_satoshis: 100_000 - 5_000 - 4_000 - 3,
1185                         confirmation_height: nodes[1].best_block_info().1 + 1,
1186                 }, Balance::ClaimableAwaitingConfirmations {
1187                         claimable_amount_satoshis: 1_000_000 - 100_000 - 3_000 - chan_feerate *
1188                                 (channel::commitment_tx_base_weight(&channel_type_features) + 3 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000
1189                                 - chan_feerate * claim_txn[3].weight() as u64 / 1000,
1190                         confirmation_height: to_self_claimed_avail_height,
1191                 }, Balance::ClaimableAwaitingConfirmations {
1192                         claimable_amount_satoshis: 3_000 - chan_feerate * OUTBOUND_HTLC_CLAIM_EXP_WEIGHT as u64 / 1000,
1193                         confirmation_height: nodes[1].best_block_info().1 + 4,
1194                 }, Balance::ClaimableAwaitingConfirmations {
1195                         claimable_amount_satoshis: 4_000 - chan_feerate * INBOUND_HTLC_CLAIM_EXP_WEIGHT as u64 / 1000,
1196                         confirmation_height: nodes[1].best_block_info().1 + 5,
1197                 }, Balance::ClaimableAwaitingConfirmations {
1198                         claimable_amount_satoshis: 5_000 - chan_feerate * INBOUND_HTLC_CLAIM_EXP_WEIGHT as u64 / 1000,
1199                         confirmation_height: largest_htlc_claimed_avail_height,
1200                 }]),
1201                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1202
1203         connect_blocks(&nodes[1], 1);
1204         test_spendable_output(&nodes[1], &as_revoked_txn[0]);
1205
1206         let mut payment_failed_events = nodes[1].node.get_and_clear_pending_events();
1207         expect_payment_failed_conditions_event(payment_failed_events[..2].to_vec(),
1208                 missing_htlc_payment_hash, false, PaymentFailedConditions::new());
1209         expect_payment_failed_conditions_event(payment_failed_events[2..].to_vec(),
1210                 dust_payment_hash, false, PaymentFailedConditions::new());
1211
1212         connect_blocks(&nodes[1], 1);
1213         test_spendable_output(&nodes[1], &claim_txn[if confirm_htlc_spend_first { 2 } else { 3 }]);
1214         connect_blocks(&nodes[1], 1);
1215         test_spendable_output(&nodes[1], &claim_txn[if confirm_htlc_spend_first { 3 } else { 2 }]);
1216         expect_payment_failed!(nodes[1], live_payment_hash, false);
1217         connect_blocks(&nodes[1], 1);
1218         test_spendable_output(&nodes[1], &claim_txn[0]);
1219         connect_blocks(&nodes[1], 1);
1220         test_spendable_output(&nodes[1], &claim_txn[1]);
1221         expect_payment_failed!(nodes[1], timeout_payment_hash, false);
1222         assert_eq!(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances(), Vec::new());
1223
1224         // Ensure that even if we connect more blocks, potentially replaying the entire chain if we're
1225         // using `ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks`, we don't get new
1226         // monitor events or claimable balances.
1227         connect_blocks(&nodes[1], 6);
1228         connect_blocks(&nodes[1], 6);
1229         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
1230         assert!(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
1231 }
1232
1233 #[test]
1234 fn test_revoked_counterparty_commitment_balances() {
1235         do_test_revoked_counterparty_commitment_balances(true);
1236         do_test_revoked_counterparty_commitment_balances(false);
1237 }
1238
1239 #[test]
1240 fn test_revoked_counterparty_htlc_tx_balances() {
1241         // Tests `get_claimable_balances` for revocation spends of HTLC transactions.
1242         let mut chanmon_cfgs = create_chanmon_cfgs(2);
1243         chanmon_cfgs[1].keys_manager.disable_revocation_policy_check = true;
1244         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1245         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
1246         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1247
1248         // Create some initial channels
1249         let (_, _, chan_id, funding_tx) =
1250                 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 11_000_000);
1251         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
1252         assert_eq!(funding_outpoint.to_channel_id(), chan_id);
1253
1254         let payment_preimage = route_payment(&nodes[0], &[&nodes[1]], 3_000_000).0;
1255         let failed_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 1_000_000).1;
1256         let revoked_local_txn = get_local_commitment_txn!(nodes[1], chan_id);
1257         assert_eq!(revoked_local_txn[0].input.len(), 1);
1258         assert_eq!(revoked_local_txn[0].input[0].previous_output.txid, funding_tx.txid());
1259
1260         // The to-be-revoked commitment tx should have two HTLCs and an output for both sides
1261         assert_eq!(revoked_local_txn[0].output.len(), 4);
1262
1263         claim_payment(&nodes[0], &[&nodes[1]], payment_preimage);
1264
1265         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
1266         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
1267
1268         // B will generate an HTLC-Success from its revoked commitment tx
1269         mine_transaction(&nodes[1], &revoked_local_txn[0]);
1270         check_closed_broadcast!(nodes[1], true);
1271         check_added_monitors!(nodes[1], 1);
1272         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
1273         let revoked_htlc_success = {
1274                 let mut txn = nodes[1].tx_broadcaster.txn_broadcast();
1275                 assert_eq!(txn.len(), 1);
1276                 assert_eq!(txn[0].input.len(), 1);
1277                 assert_eq!(txn[0].input[0].witness.last().unwrap().len(), ACCEPTED_HTLC_SCRIPT_WEIGHT);
1278                 check_spends!(txn[0], revoked_local_txn[0]);
1279                 txn.pop().unwrap()
1280         };
1281
1282         connect_blocks(&nodes[1], TEST_FINAL_CLTV);
1283         let revoked_htlc_timeout = {
1284                 let mut txn = nodes[1].tx_broadcaster.unique_txn_broadcast();
1285                 assert_eq!(txn.len(), 2);
1286                 if txn[0].input[0].previous_output == revoked_htlc_success.input[0].previous_output {
1287                         txn.remove(1)
1288                 } else {
1289                         txn.remove(0)
1290                 }
1291         };
1292         check_spends!(revoked_htlc_timeout, revoked_local_txn[0]);
1293         assert_ne!(revoked_htlc_success.input[0].previous_output, revoked_htlc_timeout.input[0].previous_output);
1294         assert_eq!(revoked_htlc_success.lock_time.0, 0);
1295         assert_ne!(revoked_htlc_timeout.lock_time.0, 0);
1296
1297         // A will generate justice tx from B's revoked commitment/HTLC tx
1298         mine_transaction(&nodes[0], &revoked_local_txn[0]);
1299         check_closed_broadcast!(nodes[0], true);
1300         check_added_monitors!(nodes[0], 1);
1301         check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed);
1302         let to_remote_conf_height = nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1;
1303
1304         let as_commitment_claim_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
1305         assert_eq!(as_commitment_claim_txn.len(), 1);
1306         check_spends!(as_commitment_claim_txn[0], revoked_local_txn[0]);
1307
1308         // The next two checks have the same balance set for A - even though we confirm a revoked HTLC
1309         // transaction our balance tracking doesn't use the on-chain value so the
1310         // `CounterpartyRevokedOutputClaimable` entry doesn't change.
1311         let as_balances = sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
1312                         // to_remote output in B's revoked commitment
1313                         claimable_amount_satoshis: 1_000_000 - 11_000 - 3_000 - chan_feerate *
1314                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1315                         confirmation_height: to_remote_conf_height,
1316                 }, Balance::CounterpartyRevokedOutputClaimable {
1317                         // to_self output in B's revoked commitment
1318                         claimable_amount_satoshis: 10_000,
1319                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 1
1320                         claimable_amount_satoshis: 3_000,
1321                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1322                         claimable_amount_satoshis: 1_000,
1323                 }]);
1324         assert_eq!(as_balances,
1325                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1326
1327         mine_transaction(&nodes[0], &revoked_htlc_success);
1328         let as_htlc_claim_tx = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
1329         assert_eq!(as_htlc_claim_tx.len(), 2);
1330         check_spends!(as_htlc_claim_tx[0], revoked_htlc_success);
1331         check_spends!(as_htlc_claim_tx[1], revoked_local_txn[0]); // A has to generate a new claim for the remaining revoked
1332                                                                   // outputs (which no longer includes the spent HTLC output)
1333
1334         assert_eq!(as_balances,
1335                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1336
1337         assert_eq!(as_htlc_claim_tx[0].output.len(), 1);
1338         fuzzy_assert_eq(as_htlc_claim_tx[0].output[0].value,
1339                 3_000 - chan_feerate * (revoked_htlc_success.weight() + as_htlc_claim_tx[0].weight()) as u64 / 1000);
1340
1341         mine_transaction(&nodes[0], &as_htlc_claim_tx[0]);
1342         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
1343                         // to_remote output in B's revoked commitment
1344                         claimable_amount_satoshis: 1_000_000 - 11_000 - 3_000 - chan_feerate *
1345                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1346                         confirmation_height: to_remote_conf_height,
1347                 }, Balance::CounterpartyRevokedOutputClaimable {
1348                         // to_self output in B's revoked commitment
1349                         claimable_amount_satoshis: 10_000,
1350                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1351                         claimable_amount_satoshis: 1_000,
1352                 }, Balance::ClaimableAwaitingConfirmations {
1353                         claimable_amount_satoshis: as_htlc_claim_tx[0].output[0].value,
1354                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1,
1355                 }]),
1356                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1357
1358         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 3);
1359         test_spendable_output(&nodes[0], &revoked_local_txn[0]);
1360         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1361                         // to_self output to B
1362                         claimable_amount_satoshis: 10_000,
1363                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1364                         claimable_amount_satoshis: 1_000,
1365                 }, Balance::ClaimableAwaitingConfirmations {
1366                         claimable_amount_satoshis: as_htlc_claim_tx[0].output[0].value,
1367                         confirmation_height: nodes[0].best_block_info().1 + 2,
1368                 }]),
1369                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1370
1371         connect_blocks(&nodes[0], 2);
1372         test_spendable_output(&nodes[0], &as_htlc_claim_tx[0]);
1373         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1374                         // to_self output in B's revoked commitment
1375                         claimable_amount_satoshis: 10_000,
1376                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1377                         claimable_amount_satoshis: 1_000,
1378                 }]),
1379                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1380
1381         connect_blocks(&nodes[0], revoked_htlc_timeout.lock_time.0 - nodes[0].best_block_info().1);
1382         expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore!(&nodes[0],
1383                 [HTLCDestination::FailedPayment { payment_hash: failed_payment_hash }]);
1384         // As time goes on A may split its revocation claim transaction into multiple.
1385         let as_fewer_input_rbf = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
1386         for tx in as_fewer_input_rbf.iter() {
1387                 check_spends!(tx, revoked_local_txn[0]);
1388         }
1389
1390         // Connect a number of additional blocks to ensure we don't forget the HTLC output needs
1391         // claiming.
1392         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
1393         let as_fewer_input_rbf = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
1394         for tx in as_fewer_input_rbf.iter() {
1395                 check_spends!(tx, revoked_local_txn[0]);
1396         }
1397
1398         mine_transaction(&nodes[0], &revoked_htlc_timeout);
1399         let as_second_htlc_claim_tx = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
1400         assert_eq!(as_second_htlc_claim_tx.len(), 2);
1401
1402         check_spends!(as_second_htlc_claim_tx[0], revoked_htlc_timeout);
1403         check_spends!(as_second_htlc_claim_tx[1], revoked_local_txn[0]);
1404
1405         // Connect blocks to finalize the HTLC resolution with the HTLC-Timeout transaction. In a
1406         // previous iteration of the revoked balance handling this would result in us "forgetting" that
1407         // the revoked HTLC output still needed to be claimed.
1408         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
1409         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1410                         // to_self output in B's revoked commitment
1411                         claimable_amount_satoshis: 10_000,
1412                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1413                         claimable_amount_satoshis: 1_000,
1414                 }]),
1415                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1416
1417         mine_transaction(&nodes[0], &as_second_htlc_claim_tx[0]);
1418         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1419                         // to_self output in B's revoked commitment
1420                         claimable_amount_satoshis: 10_000,
1421                 }, Balance::ClaimableAwaitingConfirmations {
1422                         claimable_amount_satoshis: as_second_htlc_claim_tx[0].output[0].value,
1423                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1,
1424                 }]),
1425                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1426
1427         mine_transaction(&nodes[0], &as_second_htlc_claim_tx[1]);
1428         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
1429                         // to_self output in B's revoked commitment
1430                         claimable_amount_satoshis: as_second_htlc_claim_tx[1].output[0].value,
1431                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 1,
1432                 }, Balance::ClaimableAwaitingConfirmations {
1433                         claimable_amount_satoshis: as_second_htlc_claim_tx[0].output[0].value,
1434                         confirmation_height: nodes[0].best_block_info().1 + ANTI_REORG_DELAY - 2,
1435                 }]),
1436                 sorted_vec(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1437
1438         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 2);
1439         test_spendable_output(&nodes[0], &as_second_htlc_claim_tx[0]);
1440         connect_blocks(&nodes[0], 1);
1441         test_spendable_output(&nodes[0], &as_second_htlc_claim_tx[1]);
1442
1443         assert_eq!(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances(), Vec::new());
1444
1445         // Ensure that even if we connect more blocks, potentially replaying the entire chain if we're
1446         // using `ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks`, we don't get new
1447         // monitor events or claimable balances.
1448         connect_blocks(&nodes[0], 6);
1449         connect_blocks(&nodes[0], 6);
1450         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
1451         assert!(nodes[0].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
1452 }
1453
1454 #[test]
1455 fn test_revoked_counterparty_aggregated_claims() {
1456         // Tests `get_claimable_balances` for revoked counterparty commitment transactions when
1457         // claiming with an aggregated claim transaction.
1458         let mut chanmon_cfgs = create_chanmon_cfgs(2);
1459         // We broadcast a second-to-latest commitment transaction, without providing the revocation
1460         // secret to the counterparty. However, because we always immediately take the revocation
1461         // secret from the keys_manager, we would panic at broadcast as we're trying to sign a
1462         // transaction which, from the point of view of our keys_manager, is revoked.
1463         chanmon_cfgs[1].keys_manager.disable_revocation_policy_check = true;
1464         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1465         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
1466         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1467
1468         let (_, _, chan_id, funding_tx) =
1469                 create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 100_000_000);
1470         let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 };
1471         assert_eq!(funding_outpoint.to_channel_id(), chan_id);
1472
1473         // We create two HTLCs, one which we will give A the preimage to to generate an HTLC-Success
1474         // transaction, and one which we will not, allowing B to claim the HTLC output in an aggregated
1475         // revocation-claim transaction.
1476
1477         let (claimed_payment_preimage, claimed_payment_hash, ..) = route_payment(&nodes[1], &[&nodes[0]], 3_000_000);
1478         let revoked_payment_hash = route_payment(&nodes[1], &[&nodes[0]], 4_000_000).1;
1479
1480         let htlc_cltv_timeout = nodes[1].best_block_info().1 + TEST_FINAL_CLTV + 1; // Note ChannelManager adds one to CLTV timeouts for safety
1481
1482         // Cheat by giving A's ChannelMonitor the preimage to the to-be-claimed HTLC so that we have an
1483         // HTLC-claim transaction on the to-be-revoked state.
1484         get_monitor!(nodes[0], chan_id).provide_payment_preimage(&claimed_payment_hash, &claimed_payment_preimage,
1485                 &node_cfgs[0].tx_broadcaster, &LowerBoundedFeeEstimator::new(node_cfgs[0].fee_estimator), &nodes[0].logger);
1486
1487         // Now get the latest commitment transaction from A and then update the fee to revoke it
1488         let as_revoked_txn = get_local_commitment_txn!(nodes[0], chan_id);
1489
1490         assert_eq!(as_revoked_txn.len(), 2);
1491         check_spends!(as_revoked_txn[0], funding_tx);
1492         check_spends!(as_revoked_txn[1], as_revoked_txn[0]); // The HTLC-Claim transaction
1493
1494         let channel_type_features = get_channel_type_features!(nodes[0], nodes[1], chan_id);
1495         let chan_feerate = get_feerate!(nodes[0], nodes[1], chan_id) as u64;
1496
1497         {
1498                 let mut feerate = chanmon_cfgs[0].fee_estimator.sat_per_kw.lock().unwrap();
1499                 *feerate += 1;
1500         }
1501         nodes[0].node.timer_tick_occurred();
1502         check_added_monitors!(nodes[0], 1);
1503
1504         let fee_update = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
1505         nodes[1].node.handle_update_fee(&nodes[0].node.get_our_node_id(), &fee_update.update_fee.unwrap());
1506         commitment_signed_dance!(nodes[1], nodes[0], fee_update.commitment_signed, false);
1507
1508         nodes[0].node.claim_funds(claimed_payment_preimage);
1509         expect_payment_claimed!(nodes[0], claimed_payment_hash, 3_000_000);
1510         check_added_monitors!(nodes[0], 1);
1511         let _a_htlc_msgs = get_htlc_update_msgs!(&nodes[0], nodes[1].node.get_our_node_id());
1512
1513         assert_eq!(sorted_vec(vec![Balance::ClaimableOnChannelClose {
1514                         claimable_amount_satoshis: 100_000 - 4_000 - 3_000,
1515                 }, Balance::MaybeTimeoutClaimableHTLC {
1516                         claimable_amount_satoshis: 4_000,
1517                         claimable_height: htlc_cltv_timeout,
1518                         payment_hash: revoked_payment_hash,
1519                 }, Balance::MaybeTimeoutClaimableHTLC {
1520                         claimable_amount_satoshis: 3_000,
1521                         claimable_height: htlc_cltv_timeout,
1522                         payment_hash: claimed_payment_hash,
1523                 }]),
1524                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1525
1526         mine_transaction(&nodes[1], &as_revoked_txn[0]);
1527         check_closed_broadcast!(nodes[1], true);
1528         check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed);
1529         check_added_monitors!(nodes[1], 1);
1530
1531         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();
1532         // Currently the revoked commitment outputs are all claimed in one aggregated transaction
1533         assert_eq!(claim_txn.len(), 1);
1534         assert_eq!(claim_txn[0].input.len(), 3);
1535         check_spends!(claim_txn[0], as_revoked_txn[0]);
1536
1537         let to_remote_maturity = nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1;
1538
1539         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
1540                         // to_remote output in A's revoked commitment
1541                         claimable_amount_satoshis: 100_000 - 4_000 - 3_000,
1542                         confirmation_height: to_remote_maturity,
1543                 }, Balance::CounterpartyRevokedOutputClaimable {
1544                         // to_self output in A's revoked commitment
1545                         claimable_amount_satoshis: 1_000_000 - 100_000 - chan_feerate *
1546                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1547                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 1
1548                         claimable_amount_satoshis: 4_000,
1549                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1550                         claimable_amount_satoshis: 3_000,
1551                 }]),
1552                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1553
1554         // Confirm A's HTLC-Success tranasction which presumably raced B's claim, causing B to create a
1555         // new claim.
1556         mine_transaction(&nodes[1], &as_revoked_txn[1]);
1557         expect_payment_sent!(nodes[1], claimed_payment_preimage);
1558         let mut claim_txn_2: Vec<_> = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clone();
1559         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 });
1560         // Once B sees the HTLC-Success transaction it splits its claim transaction into two, though in
1561         // theory it could re-aggregate the claims as well.
1562         assert_eq!(claim_txn_2.len(), 2);
1563         assert_eq!(claim_txn_2[0].input.len(), 2);
1564         check_spends!(claim_txn_2[0], as_revoked_txn[0]);
1565         assert_eq!(claim_txn_2[1].input.len(), 1);
1566         check_spends!(claim_txn_2[1], as_revoked_txn[1]);
1567
1568         assert_eq!(sorted_vec(vec![Balance::ClaimableAwaitingConfirmations {
1569                         // to_remote output in A's revoked commitment
1570                         claimable_amount_satoshis: 100_000 - 4_000 - 3_000,
1571                         confirmation_height: to_remote_maturity,
1572                 }, Balance::CounterpartyRevokedOutputClaimable {
1573                         // to_self output in A's revoked commitment
1574                         claimable_amount_satoshis: 1_000_000 - 100_000 - chan_feerate *
1575                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1576                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 1
1577                         claimable_amount_satoshis: 4_000,
1578                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1579                         // The amount here is a bit of a misnomer, really its been reduced by the HTLC
1580                         // transaction fee, but the claimable amount is always a bit of an overshoot for HTLCs
1581                         // anyway, so its not a big change.
1582                         claimable_amount_satoshis: 3_000,
1583                 }]),
1584                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1585
1586         connect_blocks(&nodes[1], 5);
1587         test_spendable_output(&nodes[1], &as_revoked_txn[0]);
1588
1589         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1590                         // to_self output in A's revoked commitment
1591                         claimable_amount_satoshis: 1_000_000 - 100_000 - chan_feerate *
1592                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1593                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 1
1594                         claimable_amount_satoshis: 4_000,
1595                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 2
1596                         // The amount here is a bit of a misnomer, really its been reduced by the HTLC
1597                         // transaction fee, but the claimable amount is always a bit of an overshoot for HTLCs
1598                         // anyway, so its not a big change.
1599                         claimable_amount_satoshis: 3_000,
1600                 }]),
1601                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1602
1603         mine_transaction(&nodes[1], &claim_txn_2[1]);
1604         let htlc_2_claim_maturity = nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1;
1605
1606         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1607                         // to_self output in A's revoked commitment
1608                         claimable_amount_satoshis: 1_000_000 - 100_000 - chan_feerate *
1609                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1610                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 1
1611                         claimable_amount_satoshis: 4_000,
1612                 }, Balance::ClaimableAwaitingConfirmations { // HTLC 2
1613                         claimable_amount_satoshis: claim_txn_2[1].output[0].value,
1614                         confirmation_height: htlc_2_claim_maturity,
1615                 }]),
1616                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1617
1618         connect_blocks(&nodes[1], 5);
1619         test_spendable_output(&nodes[1], &claim_txn_2[1]);
1620
1621         assert_eq!(sorted_vec(vec![Balance::CounterpartyRevokedOutputClaimable {
1622                         // to_self output in A's revoked commitment
1623                         claimable_amount_satoshis: 1_000_000 - 100_000 - chan_feerate *
1624                                 (channel::commitment_tx_base_weight(&channel_type_features) + 2 * channel::COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000,
1625                 }, Balance::CounterpartyRevokedOutputClaimable { // HTLC 1
1626                         claimable_amount_satoshis: 4_000,
1627                 }]),
1628                 sorted_vec(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances()));
1629
1630         mine_transaction(&nodes[1], &claim_txn_2[0]);
1631         let rest_claim_maturity = nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1;
1632
1633         assert_eq!(vec![Balance::ClaimableAwaitingConfirmations {
1634                         claimable_amount_satoshis: claim_txn_2[0].output[0].value,
1635                         confirmation_height: rest_claim_maturity,
1636                 }],
1637                 nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances());
1638
1639         assert!(nodes[1].node.get_and_clear_pending_events().is_empty()); // We shouldn't fail the payment until we spend the output
1640
1641         connect_blocks(&nodes[1], 5);
1642         expect_payment_failed!(nodes[1], revoked_payment_hash, false);
1643         test_spendable_output(&nodes[1], &claim_txn_2[0]);
1644         assert!(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
1645
1646         // Ensure that even if we connect more blocks, potentially replaying the entire chain if we're
1647         // using `ConnectStyle::HighlyRedundantTransactionsFirstSkippingBlocks`, we don't get new
1648         // monitor events or claimable balances.
1649         connect_blocks(&nodes[1], 6);
1650         connect_blocks(&nodes[1], 6);
1651         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
1652         assert!(nodes[1].chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances().is_empty());
1653 }
1654
1655 fn do_test_restored_packages_retry(check_old_monitor_retries_after_upgrade: bool) {
1656         // Tests that we'll retry packages that were previously timelocked after we've restored them.
1657         let persister;
1658         let new_chain_monitor;
1659         let node_deserialized;
1660
1661         let chanmon_cfgs = create_chanmon_cfgs(2);
1662         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1663         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
1664         let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1665
1666         // Open a channel, lock in an HTLC, and immediately broadcast the commitment transaction. This
1667         // ensures that the HTLC timeout package is held until we reach its expiration height.
1668         let (_, _, chan_id, funding_tx) = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100_000, 50_000_000);
1669         route_payment(&nodes[0], &[&nodes[1]], 10_000_000);
1670
1671         nodes[0].node.force_close_broadcasting_latest_txn(&chan_id, &nodes[1].node.get_our_node_id()).unwrap();
1672         check_added_monitors(&nodes[0], 1);
1673         check_closed_broadcast(&nodes[0], 1, true);
1674         check_closed_event(&nodes[0], 1, ClosureReason::HolderForceClosed, false);
1675
1676         let commitment_tx = {
1677                 let mut txn = nodes[0].tx_broadcaster.txn_broadcast();
1678                 assert_eq!(txn.len(), 1);
1679                 assert_eq!(txn[0].output.len(), 3);
1680                 check_spends!(txn[0], funding_tx);
1681                 txn.pop().unwrap()
1682         };
1683
1684         mine_transaction(&nodes[0], &commitment_tx);
1685
1686         // Connect blocks until the HTLC's expiration is met, expecting a transaction broadcast.
1687         connect_blocks(&nodes[0], TEST_FINAL_CLTV);
1688         let htlc_timeout_tx = {
1689                 let mut txn = nodes[0].tx_broadcaster.txn_broadcast();
1690                 assert_eq!(txn.len(), 1);
1691                 check_spends!(txn[0], commitment_tx);
1692                 txn.pop().unwrap()
1693         };
1694
1695         // Check that we can still rebroadcast these packages/transactions if we're upgrading from an
1696         // old `ChannelMonitor` that did not exercise said rebroadcasting logic.
1697         if check_old_monitor_retries_after_upgrade {
1698                 let serialized_monitor = hex::decode(
1699 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1700                 ).unwrap();
1701                 reload_node!(nodes[0], &nodes[0].node.encode(), &[&serialized_monitor], persister, new_chain_monitor, node_deserialized);
1702         }
1703
1704         // Connecting more blocks should result in the HTLC transactions being rebroadcast.
1705         connect_blocks(&nodes[0], 6);
1706         if check_old_monitor_retries_after_upgrade {
1707                 check_added_monitors(&nodes[0], 1);
1708         }
1709         {
1710                 let txn = nodes[0].tx_broadcaster.txn_broadcast();
1711                 if !nodes[0].connect_style.borrow().skips_blocks() {
1712                         assert_eq!(txn.len(), 6);
1713                 } else {
1714                         assert!(txn.len() < 6);
1715                 }
1716                 for tx in txn {
1717                         assert_eq!(tx.input.len(), htlc_timeout_tx.input.len());
1718                         assert_eq!(tx.output.len(), htlc_timeout_tx.output.len());
1719                         assert_eq!(tx.input[0].previous_output, htlc_timeout_tx.input[0].previous_output);
1720                         assert_eq!(tx.output[0], htlc_timeout_tx.output[0]);
1721                 }
1722         }
1723 }
1724
1725 #[test]
1726 fn test_restored_packages_retry() {
1727         do_test_restored_packages_retry(false);
1728         do_test_restored_packages_retry(true);
1729 }
1730
1731 fn do_test_monitor_rebroadcast_pending_claims(anchors: bool) {
1732         // Test that we will retry broadcasting pending claims for a force-closed channel on every
1733         // `ChainMonitor::rebroadcast_pending_claims` call.
1734         if anchors {
1735                 assert!(cfg!(anchors));
1736         }
1737         let mut chanmon_cfgs = create_chanmon_cfgs(2);
1738         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1739         let mut config = test_default_channel_config();
1740         if anchors {
1741                 #[cfg(anchors)] {
1742                         config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
1743                 }
1744         }
1745         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[Some(config), Some(config)]);
1746         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1747
1748         let (_, _, _, chan_id, funding_tx) = create_chan_between_nodes_with_value(
1749                 &nodes[0], &nodes[1], 1_000_000, 500_000_000
1750         );
1751         const HTLC_AMT_MSAT: u64 = 1_000_000;
1752         const HTLC_AMT_SAT: u64 = HTLC_AMT_MSAT / 1000;
1753         route_payment(&nodes[0], &[&nodes[1]], HTLC_AMT_MSAT);
1754
1755         let htlc_expiry = nodes[0].best_block_info().1 + TEST_FINAL_CLTV + 1;
1756
1757         let commitment_txn = get_local_commitment_txn!(&nodes[0], &chan_id);
1758         assert_eq!(commitment_txn.len(), if anchors { 1 /* commitment tx only */} else { 2 /* commitment and htlc timeout tx */ });
1759         check_spends!(&commitment_txn[0], &funding_tx);
1760         mine_transaction(&nodes[0], &commitment_txn[0]);
1761         check_closed_broadcast!(&nodes[0], true);
1762         check_closed_event(&nodes[0], 1, ClosureReason::CommitmentTxConfirmed, false);
1763         check_added_monitors(&nodes[0], 1);
1764
1765         // Set up a helper closure we'll use throughout our test. We should only expect retries without
1766         // bumps if fees have not increased after a block has been connected (assuming the height timer
1767         // re-evaluates at every block) or after `ChainMonitor::rebroadcast_pending_claims` is called.
1768         let mut prev_htlc_tx_feerate = None;
1769         let mut check_htlc_retry = |should_retry: bool, should_bump: bool| -> Option<Transaction> {
1770                 let (htlc_tx, htlc_tx_feerate) = if anchors {
1771                         assert!(nodes[0].tx_broadcaster.txn_broadcast().is_empty());
1772                         let mut events = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
1773                         assert_eq!(events.len(), if should_retry { 1 } else { 0 });
1774                         if !should_retry {
1775                                 return None;
1776                         }
1777                         #[allow(unused_assignments)]
1778                         let mut tx = Transaction {
1779                                 version: 2,
1780                                 lock_time: bitcoin::PackedLockTime::ZERO,
1781                                 input: vec![],
1782                                 output: vec![],
1783                         };
1784                         #[allow(unused_assignments)]
1785                         let mut feerate = 0;
1786                         #[cfg(anchors)] {
1787                                 feerate = if let Event::BumpTransaction(BumpTransactionEvent::HTLCResolution {
1788                                         target_feerate_sat_per_1000_weight, mut htlc_descriptors, tx_lock_time, ..
1789                                 }) = events.pop().unwrap() {
1790                                         let secp = Secp256k1::new();
1791                                         assert_eq!(htlc_descriptors.len(), 1);
1792                                         let descriptor = htlc_descriptors.pop().unwrap();
1793                                         assert_eq!(descriptor.commitment_txid, commitment_txn[0].txid());
1794                                         let htlc_output_idx = descriptor.htlc.transaction_output_index.unwrap() as usize;
1795                                         assert!(htlc_output_idx < commitment_txn[0].output.len());
1796                                         tx.lock_time = tx_lock_time;
1797                                         // Note that we don't care about actually making the HTLC transaction meet the
1798                                         // feerate for the test, we just want to make sure the feerates we receive from
1799                                         // the events never decrease.
1800                                         tx.input.push(descriptor.unsigned_tx_input());
1801                                         let signer = nodes[0].keys_manager.derive_channel_keys(
1802                                                 descriptor.channel_value_satoshis, &descriptor.channel_keys_id,
1803                                         );
1804                                         let per_commitment_point = signer.get_per_commitment_point(
1805                                                 descriptor.per_commitment_number, &secp
1806                                         );
1807                                         tx.output.push(descriptor.tx_output(&per_commitment_point, &secp));
1808                                         let our_sig = signer.sign_holder_htlc_transaction(&mut tx, 0, &descriptor, &secp).unwrap();
1809                                         let witness_script = descriptor.witness_script(&per_commitment_point, &secp);
1810                                         tx.input[0].witness = descriptor.tx_input_witness(&our_sig, &witness_script);
1811                                         target_feerate_sat_per_1000_weight as u64
1812                                 } else { panic!("unexpected event"); };
1813                         }
1814                         (tx, feerate)
1815                 } else {
1816                         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
1817                         let mut txn = nodes[0].tx_broadcaster.txn_broadcast();
1818                         assert_eq!(txn.len(), if should_retry { 1 } else { 0 });
1819                         if !should_retry {
1820                                 return None;
1821                         }
1822                         let htlc_tx = txn.pop().unwrap();
1823                         check_spends!(htlc_tx, commitment_txn[0]);
1824                         let htlc_tx_fee = HTLC_AMT_SAT - htlc_tx.output[0].value;
1825                         let htlc_tx_feerate = htlc_tx_fee * 1000 / htlc_tx.weight() as u64;
1826                         (htlc_tx, htlc_tx_feerate)
1827                 };
1828                 if should_bump {
1829                         assert!(htlc_tx_feerate > prev_htlc_tx_feerate.take().unwrap());
1830                 } else if let Some(prev_feerate) = prev_htlc_tx_feerate.take() {
1831                         assert_eq!(htlc_tx_feerate, prev_feerate);
1832                 }
1833                 prev_htlc_tx_feerate = Some(htlc_tx_feerate);
1834                 Some(htlc_tx)
1835         };
1836
1837         // Connect blocks up to one before the HTLC expires. This should not result in a claim/retry.
1838         connect_blocks(&nodes[0], htlc_expiry - nodes[0].best_block_info().1 - 1);
1839         check_htlc_retry(false, false);
1840
1841         // Connect one more block, producing our first claim.
1842         connect_blocks(&nodes[0], 1);
1843         check_htlc_retry(true, false);
1844
1845         // Connect one more block, expecting a retry with a fee bump. Unfortunately, we cannot bump HTLC
1846         // transactions pre-anchors.
1847         connect_blocks(&nodes[0], 1);
1848         check_htlc_retry(true, anchors);
1849
1850         // Trigger a call and we should have another retry, but without a bump.
1851         nodes[0].chain_monitor.chain_monitor.rebroadcast_pending_claims();
1852         check_htlc_retry(true, false);
1853
1854         // Double the feerate and trigger a call, expecting a fee-bumped retry.
1855         *nodes[0].fee_estimator.sat_per_kw.lock().unwrap() *= 2;
1856         nodes[0].chain_monitor.chain_monitor.rebroadcast_pending_claims();
1857         check_htlc_retry(true, anchors);
1858
1859         // Connect one more block, expecting a retry with a fee bump. Unfortunately, we cannot bump HTLC
1860         // transactions pre-anchors.
1861         connect_blocks(&nodes[0], 1);
1862         let htlc_tx = check_htlc_retry(true, anchors).unwrap();
1863
1864         // Mine the HTLC transaction to ensure we don't retry claims while they're confirmed.
1865         mine_transaction(&nodes[0], &htlc_tx);
1866         // If we have a `ConnectStyle` that advertises the new block first without the transasctions,
1867         // we'll receive an extra bumped claim.
1868         if nodes[0].connect_style.borrow().updates_best_block_first() {
1869                 check_htlc_retry(true, anchors);
1870         }
1871         nodes[0].chain_monitor.chain_monitor.rebroadcast_pending_claims();
1872         check_htlc_retry(false, false);
1873 }
1874
1875 #[test]
1876 fn test_monitor_timer_based_claim() {
1877         do_test_monitor_rebroadcast_pending_claims(false);
1878         #[cfg(anchors)]
1879         do_test_monitor_rebroadcast_pending_claims(true);
1880 }
1881
1882 #[cfg(anchors)]
1883 #[test]
1884 fn test_yield_anchors_events() {
1885         // Tests that two parties supporting anchor outputs can open a channel, route payments over
1886         // it, and finalize its resolution uncooperatively. Once the HTLCs are locked in, one side will
1887         // force close once the HTLCs expire. The force close should stem from an event emitted by LDK,
1888         // allowing the consumer to provide additional fees to the commitment transaction to be
1889         // broadcast. Once the commitment transaction confirms, events for the HTLC resolution should be
1890         // emitted by LDK, such that the consumer can attach fees to the zero fee HTLC transactions.
1891         let secp = Secp256k1::new();
1892         let mut chanmon_cfgs = create_chanmon_cfgs(2);
1893         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
1894         let mut anchors_config = UserConfig::default();
1895         anchors_config.channel_handshake_config.announced_channel = true;
1896         anchors_config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
1897         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[Some(anchors_config), Some(anchors_config)]);
1898         let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
1899
1900         let chan_id = create_announced_chan_between_nodes_with_value(
1901                 &nodes, 0, 1, 1_000_000, 500_000_000
1902         ).2;
1903         route_payment(&nodes[0], &[&nodes[1]], 1_000_000);
1904         let (payment_preimage, payment_hash, _) = route_payment(&nodes[1], &[&nodes[0]], 1_000_000);
1905
1906         assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
1907
1908         connect_blocks(&nodes[0], TEST_FINAL_CLTV + LATENCY_GRACE_PERIOD_BLOCKS + 1);
1909         check_closed_broadcast!(&nodes[0], true);
1910         assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
1911
1912         get_monitor!(nodes[0], chan_id).provide_payment_preimage(
1913                 &payment_hash, &payment_preimage, &node_cfgs[0].tx_broadcaster,
1914                 &LowerBoundedFeeEstimator::new(node_cfgs[0].fee_estimator), &nodes[0].logger
1915         );
1916
1917         let mut holder_events = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
1918         assert_eq!(holder_events.len(), 1);
1919         let (commitment_tx, anchor_tx) = match holder_events.pop().unwrap() {
1920                 Event::BumpTransaction(BumpTransactionEvent::ChannelClose { commitment_tx, anchor_descriptor, .. })  => {
1921                         assert_eq!(commitment_tx.input.len(), 1);
1922                         assert_eq!(commitment_tx.output.len(), 6);
1923                         let mut anchor_tx = Transaction {
1924                                 version: 2,
1925                                 lock_time: PackedLockTime::ZERO,
1926                                 input: vec![
1927                                         TxIn { previous_output: anchor_descriptor.outpoint, ..Default::default() },
1928                                         TxIn { ..Default::default() },
1929                                 ],
1930                                 output: vec![TxOut {
1931                                         value: Amount::ONE_BTC.to_sat(),
1932                                         script_pubkey: Script::new_op_return(&[]),
1933                                 }],
1934                         };
1935                         let signer = nodes[0].keys_manager.derive_channel_keys(
1936                                 anchor_descriptor.channel_value_satoshis, &anchor_descriptor.channel_keys_id,
1937                         );
1938                         let funding_sig = signer.sign_holder_anchor_input(&mut anchor_tx, 0, &secp).unwrap();
1939                         anchor_tx.input[0].witness = chan_utils::build_anchor_input_witness(
1940                                 &signer.pubkeys().funding_pubkey, &funding_sig
1941                         );
1942                         (commitment_tx, anchor_tx)
1943                 },
1944                 _ => panic!("Unexpected event"),
1945         };
1946
1947         mine_transactions(&nodes[0], &[&commitment_tx, &anchor_tx]);
1948         check_added_monitors!(nodes[0], 1);
1949
1950         let mut holder_events = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
1951         // Certain block `ConnectStyle`s cause an extra `ChannelClose` event to be emitted since the
1952         // best block is updated before the confirmed transactions are notified.
1953         match *nodes[0].connect_style.borrow() {
1954                 ConnectStyle::BestBlockFirst|ConnectStyle::BestBlockFirstReorgsOnlyTip|ConnectStyle::BestBlockFirstSkippingBlocks => {
1955                         assert_eq!(holder_events.len(), 3);
1956                         if let Event::BumpTransaction(BumpTransactionEvent::ChannelClose { .. }) = holder_events.remove(0) {}
1957                         else { panic!("unexpected event"); }
1958
1959                 },
1960                 _ => assert_eq!(holder_events.len(), 2),
1961         };
1962         let mut htlc_txs = Vec::with_capacity(2);
1963         for event in holder_events {
1964                 match event {
1965                         Event::BumpTransaction(BumpTransactionEvent::HTLCResolution { htlc_descriptors, tx_lock_time, .. }) => {
1966                                 assert_eq!(htlc_descriptors.len(), 1);
1967                                 let htlc_descriptor = &htlc_descriptors[0];
1968                                 let signer = nodes[0].keys_manager.derive_channel_keys(
1969                                         htlc_descriptor.channel_value_satoshis, &htlc_descriptor.channel_keys_id
1970                                 );
1971                                 let per_commitment_point = signer.get_per_commitment_point(htlc_descriptor.per_commitment_number, &secp);
1972                                 let mut htlc_tx = Transaction {
1973                                         version: 2,
1974                                         lock_time: tx_lock_time,
1975                                         input: vec![
1976                                                 htlc_descriptor.unsigned_tx_input(), // HTLC input
1977                                                 TxIn { ..Default::default() } // Fee input
1978                                         ],
1979                                         output: vec![
1980                                                 htlc_descriptor.tx_output(&per_commitment_point, &secp), // HTLC output
1981                                                 TxOut { // Fee input change
1982                                                         value: Amount::ONE_BTC.to_sat(),
1983                                                         script_pubkey: Script::new_op_return(&[]),
1984                                                 }
1985                                         ]
1986                                 };
1987                                 let our_sig = signer.sign_holder_htlc_transaction(&mut htlc_tx, 0, htlc_descriptor, &secp).unwrap();
1988                                 let witness_script = htlc_descriptor.witness_script(&per_commitment_point, &secp);
1989                                 htlc_tx.input[0].witness = htlc_descriptor.tx_input_witness(&our_sig, &witness_script);
1990                                 htlc_txs.push(htlc_tx);
1991                         },
1992                         _ => panic!("Unexpected event"),
1993                 }
1994         }
1995
1996         mine_transactions(&nodes[0], &[&htlc_txs[0], &htlc_txs[1]]);
1997         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
1998
1999         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
2000
2001         connect_blocks(&nodes[0], BREAKDOWN_TIMEOUT as u32);
2002
2003         let holder_events = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
2004         assert_eq!(holder_events.len(), 3);
2005         for event in holder_events {
2006                 match event {
2007                         Event::SpendableOutputs { .. } => {},
2008                         _ => panic!("Unexpected event"),
2009                 }
2010         }
2011
2012         // Clear the remaining events as they're not relevant to what we're testing.
2013         nodes[0].node.get_and_clear_pending_events();
2014 }
2015
2016 #[cfg(anchors)]
2017 #[test]
2018 fn test_anchors_aggregated_revoked_htlc_tx() {
2019         // Test that `ChannelMonitor`s can properly detect and claim funds from a counterparty claiming
2020         // multiple HTLCs from multiple channels in a single transaction via the success path from a
2021         // revoked commitment.
2022         let secp = Secp256k1::new();
2023         let mut chanmon_cfgs = create_chanmon_cfgs(2);
2024         // Required to sign a revoked commitment transaction
2025         chanmon_cfgs[1].keys_manager.disable_revocation_policy_check = true;
2026         let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
2027         let mut anchors_config = UserConfig::default();
2028         anchors_config.channel_handshake_config.announced_channel = true;
2029         anchors_config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
2030         let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[Some(anchors_config), Some(anchors_config)]);
2031
2032         let bob_persister: test_utils::TestPersister;
2033         let bob_chain_monitor: test_utils::TestChainMonitor;
2034         let bob_deserialized: ChannelManager<
2035                 &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface,
2036                 &test_utils::TestKeysInterface, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator,
2037                 &test_utils::TestRouter, &test_utils::TestLogger,
2038         >;
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].node.timer_tick_occurred();
2090         check_added_monitors(&nodes[1], 2);
2091         check_closed_event!(&nodes[1], 2, ClosureReason::OutdatedChannelManager);
2092         let (revoked_commitment_a, revoked_commitment_b) = {
2093                 let txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
2094                 assert_eq!(txn.len(), 2);
2095                 assert_eq!(txn[0].output.len(), 6); // 2 HTLC outputs + 1 to_self output + 1 to_remote output + 2 anchor outputs
2096                 assert_eq!(txn[1].output.len(), 6); // 2 HTLC outputs + 1 to_self output + 1 to_remote output + 2 anchor outputs
2097                 if txn[0].input[0].previous_output.txid == chan_a.3.txid() {
2098                         check_spends!(&txn[0], &chan_a.3);
2099                         check_spends!(&txn[1], &chan_b.3);
2100                         (txn[0].clone(), txn[1].clone())
2101                 } else {
2102                         check_spends!(&txn[1], &chan_a.3);
2103                         check_spends!(&txn[0], &chan_b.3);
2104                         (txn[1].clone(), txn[0].clone())
2105                 }
2106         };
2107
2108         // Bob should now receive two events to bump his revoked commitment transaction fees.
2109         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
2110         let events = nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events();
2111         assert_eq!(events.len(), 2);
2112         let anchor_tx = {
2113                 let secret_key = SecretKey::from_slice(&[1; 32]).unwrap();
2114                 let public_key = PublicKey::new(secret_key.public_key(&secp));
2115                 let fee_utxo_script = Script::new_v0_p2wpkh(&public_key.wpubkey_hash().unwrap());
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: Amount::ONE_BTC.to_sat(),
2122                                 script_pubkey: fee_utxo_script.clone(),
2123                         }],
2124                 };
2125                 let mut anchor_tx = Transaction {
2126                         version: 2,
2127                         lock_time: PackedLockTime::ZERO,
2128                         input: vec![
2129                                 TxIn { // Fee input
2130                                         previous_output: bitcoin::OutPoint { txid: coinbase_tx.txid(), vout: 0 },
2131                                         ..Default::default()
2132                                 },
2133                         ],
2134                         output: vec![TxOut { // Fee input change
2135                                 value: coinbase_tx.output[0].value / 2 ,
2136                                 script_pubkey: Script::new_op_return(&[]),
2137                         }],
2138                 };
2139                 let mut signers = Vec::with_capacity(2);
2140                 for event in events {
2141                         match event {
2142                                 Event::BumpTransaction(BumpTransactionEvent::ChannelClose { anchor_descriptor, .. })  => {
2143                                         anchor_tx.input.push(TxIn {
2144                                                 previous_output: anchor_descriptor.outpoint,
2145                                                 ..Default::default()
2146                                         });
2147                                         let signer = nodes[1].keys_manager.derive_channel_keys(
2148                                                 anchor_descriptor.channel_value_satoshis, &anchor_descriptor.channel_keys_id,
2149                                         );
2150                                         signers.push(signer);
2151                                 },
2152                                 _ => panic!("Unexpected event"),
2153                         }
2154                 }
2155                 for (i, signer) in signers.into_iter().enumerate() {
2156                         let anchor_idx = i + 1;
2157                         let funding_sig = signer.sign_holder_anchor_input(&mut anchor_tx, anchor_idx, &secp).unwrap();
2158                         anchor_tx.input[anchor_idx].witness = chan_utils::build_anchor_input_witness(
2159                                 &signer.pubkeys().funding_pubkey, &funding_sig
2160                         );
2161                 }
2162                 let fee_utxo_sig = {
2163                         let witness_script = Script::new_p2pkh(&public_key.pubkey_hash());
2164                         let sighash = hash_to_message!(&SighashCache::new(&anchor_tx).segwit_signature_hash(
2165                                 0, &witness_script, coinbase_tx.output[0].value, EcdsaSighashType::All
2166                         ).unwrap()[..]);
2167                         let sig = sign(&secp, &sighash, &secret_key);
2168                         let mut sig = sig.serialize_der().to_vec();
2169                         sig.push(EcdsaSighashType::All as u8);
2170                         sig
2171                 };
2172                 anchor_tx.input[0].witness = Witness::from_vec(vec![fee_utxo_sig, public_key.to_bytes()]);
2173                 check_spends!(anchor_tx, coinbase_tx, revoked_commitment_a, revoked_commitment_b);
2174                 anchor_tx
2175         };
2176
2177         for node in &nodes {
2178                 mine_transactions(node, &[&revoked_commitment_a, &revoked_commitment_b, &anchor_tx]);
2179         }
2180         check_added_monitors!(&nodes[0], 2);
2181         check_closed_broadcast(&nodes[0], 2, true);
2182         check_closed_event!(&nodes[0], 2, ClosureReason::CommitmentTxConfirmed);
2183
2184         // Alice should detect the confirmed revoked commitments, and attempt to claim all of the
2185         // revoked outputs.
2186         {
2187                 let txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
2188                 assert_eq!(txn.len(), 4);
2189
2190                 let (revoked_htlc_claim_a, revoked_htlc_claim_b) = if txn[0].input[0].previous_output.txid == revoked_commitment_a.txid() {
2191                         (if txn[0].input.len() == 2 { &txn[0] } else { &txn[1] }, if txn[2].input.len() == 2 { &txn[2] } else { &txn[3] })
2192                 } else {
2193                         (if txn[2].input.len() == 2 { &txn[2] } else { &txn[3] }, if txn[0].input.len() == 2 { &txn[0] } else { &txn[1] })
2194                 };
2195
2196                 assert_eq!(revoked_htlc_claim_a.input.len(), 2); // Spends both HTLC outputs
2197                 assert_eq!(revoked_htlc_claim_a.output.len(), 1);
2198                 check_spends!(revoked_htlc_claim_a, revoked_commitment_a);
2199                 assert_eq!(revoked_htlc_claim_b.input.len(), 2); // Spends both HTLC outputs
2200                 assert_eq!(revoked_htlc_claim_b.output.len(), 1);
2201                 check_spends!(revoked_htlc_claim_b, revoked_commitment_b);
2202         }
2203
2204         // Since Bob was able to confirm his revoked commitment, he'll now try to claim the HTLCs
2205         // through the success path.
2206         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
2207         let mut events = nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events();
2208         // Certain block `ConnectStyle`s cause an extra `ChannelClose` event to be emitted since the
2209         // best block is updated before the confirmed transactions are notified.
2210         match *nodes[1].connect_style.borrow() {
2211                 ConnectStyle::BestBlockFirst|ConnectStyle::BestBlockFirstReorgsOnlyTip|ConnectStyle::BestBlockFirstSkippingBlocks => {
2212                         assert_eq!(events.len(), 4);
2213                         if let Event::BumpTransaction(BumpTransactionEvent::ChannelClose { .. }) = events.remove(0) {}
2214                         else { panic!("unexpected event"); }
2215                         if let Event::BumpTransaction(BumpTransactionEvent::ChannelClose { .. }) = events.remove(1) {}
2216                         else { panic!("unexpected event"); }
2217
2218                 },
2219                 _ => assert_eq!(events.len(), 2),
2220         };
2221         let htlc_tx = {
2222                 let secret_key = SecretKey::from_slice(&[1; 32]).unwrap();
2223                 let public_key = PublicKey::new(secret_key.public_key(&secp));
2224                 let fee_utxo_script = Script::new_v0_p2wpkh(&public_key.wpubkey_hash().unwrap());
2225                 let coinbase_tx = Transaction {
2226                         version: 2,
2227                         lock_time: PackedLockTime::ZERO,
2228                         input: vec![TxIn { ..Default::default() }],
2229                         output: vec![TxOut { // UTXO to attach fees to `htlc_tx`
2230                                 value: Amount::ONE_BTC.to_sat(),
2231                                 script_pubkey: fee_utxo_script.clone(),
2232                         }],
2233                 };
2234                 let mut htlc_tx = Transaction {
2235                         version: 2,
2236                         lock_time: PackedLockTime::ZERO,
2237                         input: vec![TxIn { // Fee input
2238                                 previous_output: bitcoin::OutPoint { txid: coinbase_tx.txid(), vout: 0 },
2239                                 ..Default::default()
2240                         }],
2241                         output: vec![TxOut { // Fee input change
2242                                 value: coinbase_tx.output[0].value / 2 ,
2243                                 script_pubkey: Script::new_op_return(&[]),
2244                         }],
2245                 };
2246                 let mut descriptors = Vec::with_capacity(4);
2247                 for event in events {
2248                         if let Event::BumpTransaction(BumpTransactionEvent::HTLCResolution { mut htlc_descriptors, tx_lock_time, .. }) = event {
2249                                 assert_eq!(htlc_descriptors.len(), 2);
2250                                 for htlc_descriptor in &htlc_descriptors {
2251                                         assert!(!htlc_descriptor.htlc.offered);
2252                                         let signer = nodes[1].keys_manager.derive_channel_keys(
2253                                                 htlc_descriptor.channel_value_satoshis, &htlc_descriptor.channel_keys_id
2254                                         );
2255                                         let per_commitment_point = signer.get_per_commitment_point(htlc_descriptor.per_commitment_number, &secp);
2256                                         htlc_tx.input.push(htlc_descriptor.unsigned_tx_input());
2257                                         htlc_tx.output.push(htlc_descriptor.tx_output(&per_commitment_point, &secp));
2258                                 }
2259                                 descriptors.append(&mut htlc_descriptors);
2260                                 htlc_tx.lock_time = tx_lock_time;
2261                         } else {
2262                                 panic!("Unexpected event");
2263                         }
2264                 }
2265                 for (idx, htlc_descriptor) in descriptors.into_iter().enumerate() {
2266                         let htlc_input_idx = idx + 1;
2267                         let signer = nodes[1].keys_manager.derive_channel_keys(
2268                                 htlc_descriptor.channel_value_satoshis, &htlc_descriptor.channel_keys_id
2269                         );
2270                         let our_sig = signer.sign_holder_htlc_transaction(&htlc_tx, htlc_input_idx, &htlc_descriptor, &secp).unwrap();
2271                         let per_commitment_point = signer.get_per_commitment_point(htlc_descriptor.per_commitment_number, &secp);
2272                         let witness_script = htlc_descriptor.witness_script(&per_commitment_point, &secp);
2273                         htlc_tx.input[htlc_input_idx].witness = htlc_descriptor.tx_input_witness(&our_sig, &witness_script);
2274                 }
2275                 let fee_utxo_sig = {
2276                         let witness_script = Script::new_p2pkh(&public_key.pubkey_hash());
2277                         let sighash = hash_to_message!(&SighashCache::new(&htlc_tx).segwit_signature_hash(
2278                                 0, &witness_script, coinbase_tx.output[0].value, EcdsaSighashType::All
2279                         ).unwrap()[..]);
2280                         let sig = sign(&secp, &sighash, &secret_key);
2281                         let mut sig = sig.serialize_der().to_vec();
2282                         sig.push(EcdsaSighashType::All as u8);
2283                         sig
2284                 };
2285                 htlc_tx.input[0].witness = Witness::from_vec(vec![fee_utxo_sig, public_key.to_bytes()]);
2286                 check_spends!(htlc_tx, coinbase_tx, revoked_commitment_a, revoked_commitment_b);
2287                 htlc_tx
2288         };
2289
2290         for node in &nodes {
2291                 mine_transaction(node, &htlc_tx);
2292         }
2293
2294         // Alice should see that Bob is trying to claim to HTLCs, so she should now try to claim them at
2295         // the second level instead.
2296         let revoked_claims = {
2297                 let txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
2298                 assert_eq!(txn.len(), 2);
2299
2300                 let revoked_htlc_claims = txn.iter().filter(|tx|
2301                         tx.input.len() == 2 &&
2302                         tx.output.len() == 1 &&
2303                         tx.input[0].previous_output.txid == htlc_tx.txid()
2304                 ).collect::<Vec<_>>();
2305                 assert_eq!(revoked_htlc_claims.len(), 2);
2306                 for revoked_htlc_claim in revoked_htlc_claims {
2307                         check_spends!(revoked_htlc_claim, htlc_tx);
2308                 }
2309
2310                 txn
2311         };
2312         for node in &nodes {
2313                 mine_transactions(node, &revoked_claims.iter().collect::<Vec<_>>());
2314         }
2315
2316
2317         // Connect one block to make sure the HTLC events are not yielded while ANTI_REORG_DELAY has not
2318         // been reached.
2319         connect_blocks(&nodes[0], 1);
2320         connect_blocks(&nodes[1], 1);
2321
2322         assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
2323         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
2324
2325         // Connect the remaining blocks to reach ANTI_REORG_DELAY.
2326         connect_blocks(&nodes[0], ANTI_REORG_DELAY - 2);
2327         connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2);
2328
2329         assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
2330         let spendable_output_events = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events();
2331         assert_eq!(spendable_output_events.len(), 2);
2332         for (idx, event) in spendable_output_events.iter().enumerate() {
2333                 if let Event::SpendableOutputs { outputs } = event {
2334                         assert_eq!(outputs.len(), 1);
2335                         let spend_tx = nodes[0].keys_manager.backing.spend_spendable_outputs(
2336                                 &[&outputs[0]], Vec::new(), Script::new_op_return(&[]), 253, None, &Secp256k1::new(),
2337                         ).unwrap();
2338                         check_spends!(spend_tx, revoked_claims[idx]);
2339                 } else {
2340                         panic!("unexpected event");
2341                 }
2342         }
2343
2344         assert!(nodes[0].node.list_channels().is_empty());
2345         assert!(nodes[1].node.list_channels().is_empty());
2346         // On the Alice side, the individual to_self_claim are still pending confirmation.
2347         assert_eq!(nodes[0].chain_monitor.chain_monitor.get_claimable_balances(&[]).len(), 2);
2348         // TODO: From Bob's PoV, he still thinks he can claim the outputs from his revoked commitment.
2349         // This needs to be fixed before we enable pruning `ChannelMonitor`s once they don't have any
2350         // balances to claim.
2351         //
2352         // The 6 claimable balances correspond to his `to_self` outputs and the 2 HTLC outputs in each
2353         // revoked commitment which Bob has the preimage for.
2354         assert_eq!(nodes[1].chain_monitor.chain_monitor.get_claimable_balances(&[]).len(), 6);
2355 }