X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fln%2Freorg_tests.rs;h=0440e2135144c6efe27a53e12c0ab6d3ac836011;hb=f76f60ff855ff286fc5c71704ea74430cdfb7d86;hp=fb316caf2ef1008012ca57ffc8722ee3e9e412ef;hpb=8cc9410ae176f415d90e8ed8afe590455db63dc9;p=rust-lightning diff --git a/lightning/src/ln/reorg_tests.rs b/lightning/src/ln/reorg_tests.rs index fb316caf..0440e213 100644 --- a/lightning/src/ln/reorg_tests.rs +++ b/lightning/src/ln/reorg_tests.rs @@ -10,21 +10,26 @@ //! Further functional tests which test blockchain reorganizations. use chain::channelmonitor::{ANTI_REORG_DELAY, ChannelMonitor}; +use chain::transaction::OutPoint; use chain::{Confirm, Watch}; use ln::channelmanager::{ChannelManager, ChannelManagerReadArgs}; use ln::features::InitFeatures; -use ln::msgs::{ChannelMessageHandler, ErrorAction, HTLCFailChannelUpdate}; +use ln::msgs::ChannelMessageHandler; use util::enforcing_trait_impls::EnforcingSigner; -use util::events::{Event, MessageSendEvent, MessageSendEventsProvider}; +use util::events::{Event, MessageSendEvent, MessageSendEventsProvider, ClosureReason, HTLCDestination}; use util::test_utils; use util::ser::{ReadableArgs, Writeable}; use bitcoin::blockdata::block::{Block, BlockHeader}; +use bitcoin::blockdata::script::Builder; +use bitcoin::blockdata::opcodes; use bitcoin::hash_types::BlockHash; +use bitcoin::secp256k1::Secp256k1; use prelude::*; -use std::collections::HashMap; use core::mem; +use bitcoin::hashes::Hash; +use bitcoin::TxMerkleNode; use ln::functional_test_utils::*; @@ -57,14 +62,15 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { connect_blocks(&nodes[1], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[1].best_block_info().1); connect_blocks(&nodes[2], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[2].best_block_info().1); - let (our_payment_preimage, our_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1000000); + let (our_payment_preimage, our_payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1_000_000); // Provide preimage to node 2 by claiming payment nodes[2].node.claim_funds(our_payment_preimage); + expect_payment_claimed!(nodes[2], our_payment_hash, 1_000_000); check_added_monitors!(nodes[2], 1); get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id()); - let mut header = BlockHeader { version: 0x2000_0000, prev_blockhash: nodes[2].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; + let mut header = BlockHeader { version: 0x2000_0000, prev_blockhash: nodes[2].best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: 42, bits: 42, nonce: 42 }; let claim_txn = if local_commitment { // Broadcast node 1 commitment txn to broadcast the HTLC-Timeout let node_1_commitment_txn = get_local_commitment_txn!(nodes[1], chan_2.2); @@ -77,7 +83,8 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { connect_block(&nodes[2], &Block { header, txdata: node_1_commitment_txn.clone() }); check_added_monitors!(nodes[2], 1); check_closed_broadcast!(nodes[2], true); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate) - let node_2_commitment_txn = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap(); + check_closed_event!(nodes[2], 1, ClosureReason::CommitmentTxConfirmed); + let node_2_commitment_txn = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0); assert_eq!(node_2_commitment_txn.len(), 3); // ChannelMonitor: 1 offered HTLC-Claim, ChannelManger: 1 local commitment tx, 1 Received HTLC-Claim assert_eq!(node_2_commitment_txn[1].output.len(), 2); // to-remote and Received HTLC (to-self is dust) check_spends!(node_2_commitment_txn[1], chan_2.3); @@ -94,7 +101,7 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { vec![node_1_commitment_txn[0].clone(), node_2_commitment_txn[0].clone()] } else { // Broadcast node 2 commitment txn - let node_2_commitment_txn = get_local_commitment_txn!(nodes[2], chan_2.2); + let mut node_2_commitment_txn = get_local_commitment_txn!(nodes[2], chan_2.2); assert_eq!(node_2_commitment_txn.len(), 2); // 1 local commitment tx, 1 Received HTLC-Claim assert_eq!(node_2_commitment_txn[0].output.len(), 2); // to-remote and Received HTLC (to-self is dust) check_spends!(node_2_commitment_txn[0], chan_2.3); @@ -109,40 +116,41 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { check_spends!(node_1_commitment_txn[0], chan_2.3); check_spends!(node_1_commitment_txn[1], node_2_commitment_txn[0]); - // Confirm node 2's commitment txn (and node 1's HTLC-Timeout) on node 1 - header.prev_blockhash = nodes[1].best_block_hash(); - let block = Block { header, txdata: vec![node_2_commitment_txn[0].clone(), node_1_commitment_txn[1].clone()] }; - connect_block(&nodes[1], &block); + // Confirm node 1's HTLC-Timeout on node 1 + mine_transaction(&nodes[1], &node_1_commitment_txn[1]); // ...but return node 2's commitment tx (and claim) in case claim is set and we're preparing to reorg - node_2_commitment_txn + vec![node_2_commitment_txn.pop().unwrap()] }; check_added_monitors!(nodes[1], 1); check_closed_broadcast!(nodes[1], true); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate) + check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed); // Connect ANTI_REORG_DELAY - 2 blocks, giving us a confirmation count of ANTI_REORG_DELAY - 1. connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2); check_added_monitors!(nodes[1], 0); assert_eq!(nodes[1].node.get_and_clear_pending_events().len(), 0); if claim { - disconnect_blocks(&nodes[1], ANTI_REORG_DELAY - 2); + // Disconnect Node 1's HTLC-Timeout which was connected above + disconnect_blocks(&nodes[1], ANTI_REORG_DELAY - 1); let block = Block { - header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }, + header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: 42, bits: 42, nonce: 42 }, txdata: claim_txn, }; connect_block(&nodes[1], &block); // ChannelManager only polls chain::Watch::release_pending_monitor_events when we - // probe it for events, so we probe non-message events here (which should still end up empty): - assert_eq!(nodes[1].node.get_and_clear_pending_events().len(), 0); + // probe it for events, so we probe non-message events here (which should just be the + // PaymentForwarded event). + expect_payment_forwarded!(nodes[1], nodes[0], nodes[2], Some(1000), true, true); } else { // Confirm the timeout tx and check that we fail the HTLC backwards let block = Block { - header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }, + header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: TxMerkleNode::all_zeros(), time: 42, bits: 42, nonce: 42 }, txdata: vec![], }; connect_block(&nodes[1], &block); - expect_pending_htlcs_forwardable!(nodes[1]); + 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_2.2 }]); } check_added_monitors!(nodes[1], 1); @@ -159,12 +167,7 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { if claim { expect_payment_sent!(nodes[0], our_payment_preimage); } else { - let events = nodes[0].node.get_and_clear_pending_msg_events(); - assert_eq!(events.len(), 1); - if let MessageSendEvent::PaymentFailureNetworkUpdate { update: HTLCFailChannelUpdate::ChannelClosed { ref is_permanent, .. } } = events[0] { - assert!(is_permanent); - } else { panic!("Unexpected event!"); } - expect_payment_failed!(nodes[0], our_payment_hash, false); + expect_payment_failed_with_update!(nodes[0], our_payment_hash, false, chan_2.0.contents.short_channel_id, true); } } @@ -185,6 +188,77 @@ fn test_onchain_htlc_timeout_delay_remote_commitment() { do_test_onchain_htlc_reorg(false, false); } +#[test] +fn test_counterparty_revoked_reorg() { + // Test what happens when a revoked counterparty transaction is broadcast but then reorg'd out + // of the main chain. Specifically, HTLCs in the latest commitment transaction which are not + // included in the revoked commitment transaction should not be considered failed, and should + // still be claim-from-able after the reorg. + let chanmon_cfgs = create_chanmon_cfgs(2); + let node_cfgs = create_node_cfgs(2, &chanmon_cfgs); + let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]); + let nodes = create_network(2, &node_cfgs, &node_chanmgrs); + + let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 500_000_000, InitFeatures::known(), InitFeatures::known()); + + // Get the initial commitment transaction for broadcast, before any HTLCs are added at all. + let revoked_local_txn = get_local_commitment_txn!(nodes[0], chan.2); + assert_eq!(revoked_local_txn.len(), 1); + + // Now add two HTLCs in each direction, one dust and one not. + route_payment(&nodes[0], &[&nodes[1]], 5_000_000); + route_payment(&nodes[0], &[&nodes[1]], 5_000); + let (payment_preimage_3, payment_hash_3, ..) = route_payment(&nodes[1], &[&nodes[0]], 4_000_000); + let payment_hash_4 = route_payment(&nodes[1], &[&nodes[0]], 4_000).1; + + nodes[0].node.claim_funds(payment_preimage_3); + let _ = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id()); + check_added_monitors!(nodes[0], 1); + expect_payment_claimed!(nodes[0], payment_hash_3, 4_000_000); + + let mut unrevoked_local_txn = get_local_commitment_txn!(nodes[0], chan.2); + assert_eq!(unrevoked_local_txn.len(), 3); // commitment + 2 HTLC txn + // Sort the unrevoked transactions in reverse order, ie commitment tx, then HTLC 1 then HTLC 3 + unrevoked_local_txn.sort_unstable_by_key(|tx| 1_000_000 - tx.output.iter().map(|outp| outp.value).sum::()); + + // Now mine A's old commitment transaction, which should close the channel, but take no action + // on any of the HTLCs, at least until we get six confirmations (which we won't get). + mine_transaction(&nodes[1], &revoked_local_txn[0]); + check_added_monitors!(nodes[1], 1); + check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed); + check_closed_broadcast!(nodes[1], true); + + // Connect up to one block before the revoked transaction would be considered final, then do a + // reorg that disconnects the full chain and goes up to the height at which the revoked + // transaction would be final. + let theoretical_conf_height = nodes[1].best_block_info().1 + ANTI_REORG_DELAY - 1; + connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2); + assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty()); + assert!(nodes[1].node.get_and_clear_pending_events().is_empty()); + + disconnect_all_blocks(&nodes[1]); + assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty()); + assert!(nodes[1].node.get_and_clear_pending_events().is_empty()); + + connect_blocks(&nodes[1], theoretical_conf_height); + assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty()); + assert!(nodes[1].node.get_and_clear_pending_events().is_empty()); + + // Now connect A's latest commitment transaction instead and resolve the HTLCs + mine_transaction(&nodes[1], &unrevoked_local_txn[0]); + assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty()); + assert!(nodes[1].node.get_and_clear_pending_events().is_empty()); + + // Connect the HTLC claim transaction for HTLC 3 + mine_transaction(&nodes[1], &unrevoked_local_txn[2]); + expect_payment_sent!(nodes[1], payment_preimage_3); + assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty()); + + // Connect blocks to confirm the unrevoked commitment transaction + connect_blocks(&nodes[1], ANTI_REORG_DELAY - 2); + expect_payment_failed!(nodes[1], payment_hash_4, false); +} + fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_unconfirmed: bool, connect_style: ConnectStyle) { // After creating a chan between nodes, we disconnect all blocks previously seen to force a // channel close on nodes[0] side. We also use this to provide very basic testing of logic @@ -202,7 +276,7 @@ fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_ let channel_state = nodes[0].node.channel_state.lock().unwrap(); assert_eq!(channel_state.by_id.len(), 1); - assert_eq!(channel_state.short_to_id.len(), 1); + assert_eq!(channel_state.short_to_chan_info.len(), 2); mem::drop(channel_state); if !reorg_after_reload { @@ -210,19 +284,19 @@ fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_ let relevant_txids = nodes[0].node.get_relevant_txids(); assert_eq!(&relevant_txids[..], &[chan.3.txid()]); nodes[0].node.transaction_unconfirmed(&relevant_txids[0]); + } else if connect_style == ConnectStyle::FullBlockViaListen { + disconnect_blocks(&nodes[0], CHAN_CONFIRM_DEPTH - 1); + assert_eq!(nodes[0].node.list_usable_channels().len(), 1); + disconnect_blocks(&nodes[0], 1); } else { disconnect_all_blocks(&nodes[0]); } - if connect_style == ConnectStyle::FullBlockViaListen && !use_funding_unconfirmed { - handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 2 confs."); - } else { - handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs."); - } + handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Channel closed because of an exception: Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs."); check_added_monitors!(nodes[1], 1); { let channel_state = nodes[0].node.channel_state.lock().unwrap(); assert_eq!(channel_state.by_id.len(), 0); - assert_eq!(channel_state.short_to_id.len(), 0); + assert_eq!(channel_state.short_to_chan_info.len(), 0); } } @@ -233,7 +307,7 @@ fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_ // it when we go to deserialize, and then use the ChannelManager. let nodes_0_serialized = nodes[0].node.encode(); let mut chan_0_monitor_serialized = test_utils::TestVecWriter(Vec::new()); - nodes[0].chain_monitor.chain_monitor.monitors.read().unwrap().iter().next().unwrap().1.write(&mut chan_0_monitor_serialized).unwrap(); + get_monitor!(nodes[0], chan.2).write(&mut chan_0_monitor_serialized).unwrap(); persister = test_utils::TestPersister::new(); let keys_manager = &chanmon_cfgs[0].keys_manager; @@ -278,19 +352,19 @@ fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_ let relevant_txids = nodes[0].node.get_relevant_txids(); assert_eq!(&relevant_txids[..], &[chan.3.txid()]); nodes[0].node.transaction_unconfirmed(&relevant_txids[0]); + } else if connect_style == ConnectStyle::FullBlockViaListen { + disconnect_blocks(&nodes[0], CHAN_CONFIRM_DEPTH - 1); + assert_eq!(nodes[0].node.list_channels().len(), 1); + disconnect_blocks(&nodes[0], 1); } else { disconnect_all_blocks(&nodes[0]); } - if connect_style == ConnectStyle::FullBlockViaListen && !use_funding_unconfirmed { - handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 2 confs."); - } else { - handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs."); - } + handle_announce_close_broadcast_events(&nodes, 0, 1, true, "Channel closed because of an exception: Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs."); check_added_monitors!(nodes[1], 1); { let channel_state = nodes[0].node.channel_state.lock().unwrap(); assert_eq!(channel_state.by_id.len(), 0); - assert_eq!(channel_state.short_to_id.len(), 0); + assert_eq!(channel_state.short_to_chan_info.len(), 0); } } // With expect_channel_force_closed set the TestChainMonitor will enforce that the next update @@ -298,6 +372,9 @@ fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool, use_funding_ *nodes[0].chain_monitor.expect_channel_force_closed.lock().unwrap() = Some((chan.2, true)); nodes[0].node.test_process_background_events(); // Required to free the pending background monitor update check_added_monitors!(nodes[0], 1); + let expected_err = "Funding transaction was un-confirmed. Locked at 6 confs, now have 0 confs."; + check_closed_event!(nodes[1], 1, ClosureReason::CounterpartyForceClosed { peer_msg: "Channel closed because of an exception: ".to_owned() + expected_err }); + check_closed_event!(nodes[0], 1, ClosureReason::ProcessingError { err: expected_err.to_owned() }); assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1); nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear(); @@ -312,6 +389,11 @@ fn test_unconf_chan() { do_test_unconf_chan(false, true, false, ConnectStyle::BestBlockFirstSkippingBlocks); do_test_unconf_chan(true, false, false, ConnectStyle::BestBlockFirstSkippingBlocks); do_test_unconf_chan(false, false, false, ConnectStyle::BestBlockFirstSkippingBlocks); + + do_test_unconf_chan(true, true, false, ConnectStyle::BestBlockFirstReorgsOnlyTip); + do_test_unconf_chan(false, true, false, ConnectStyle::BestBlockFirstReorgsOnlyTip); + do_test_unconf_chan(true, false, false, ConnectStyle::BestBlockFirstReorgsOnlyTip); + do_test_unconf_chan(false, false, false, ConnectStyle::BestBlockFirstReorgsOnlyTip); } #[test] @@ -329,6 +411,11 @@ fn test_unconf_chan_via_funding_unconfirmed() { do_test_unconf_chan(true, false, true, ConnectStyle::BestBlockFirstSkippingBlocks); do_test_unconf_chan(false, false, true, ConnectStyle::BestBlockFirstSkippingBlocks); + do_test_unconf_chan(true, true, true, ConnectStyle::BestBlockFirstReorgsOnlyTip); + do_test_unconf_chan(false, true, true, ConnectStyle::BestBlockFirstReorgsOnlyTip); + do_test_unconf_chan(true, false, true, ConnectStyle::BestBlockFirstReorgsOnlyTip); + do_test_unconf_chan(false, false, true, ConnectStyle::BestBlockFirstReorgsOnlyTip); + do_test_unconf_chan(true, true, true, ConnectStyle::FullBlockViaListen); do_test_unconf_chan(false, true, true, ConnectStyle::FullBlockViaListen); do_test_unconf_chan(true, false, true, ConnectStyle::FullBlockViaListen); @@ -346,8 +433,8 @@ fn test_set_outpoints_partial_claiming() { let nodes = create_network(2, &node_cfgs, &node_chanmgrs); let chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1000000, 59000000, InitFeatures::known(), InitFeatures::known()); - let payment_preimage_1 = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3_000_000).0; - let payment_preimage_2 = route_payment(&nodes[1], &vec!(&nodes[0])[..], 3_000_000).0; + let (payment_preimage_1, payment_hash_1, _) = route_payment(&nodes[1], &[&nodes[0]], 3_000_000); + let (payment_preimage_2, payment_hash_2, _) = route_payment(&nodes[1], &[&nodes[0]], 3_000_000); // Remote commitment txn with 4 outputs: to_local, to_remote, 2 outgoing HTLC let remote_txn = get_local_commitment_txn!(nodes[1], chan.2); @@ -361,14 +448,16 @@ fn test_set_outpoints_partial_claiming() { // Connect blocks on node A to advance height towards TEST_FINAL_CLTV // Provide node A with both preimage nodes[0].node.claim_funds(payment_preimage_1); + expect_payment_claimed!(nodes[0], payment_hash_1, 3_000_000); nodes[0].node.claim_funds(payment_preimage_2); + expect_payment_claimed!(nodes[0], payment_hash_2, 3_000_000); check_added_monitors!(nodes[0], 2); - nodes[0].node.get_and_clear_pending_events(); nodes[0].node.get_and_clear_pending_msg_events(); // Connect blocks on node A commitment transaction mine_transaction(&nodes[0], &remote_txn[0]); check_closed_broadcast!(nodes[0], true); + check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed); check_added_monitors!(nodes[0], 1); // Verify node A broadcast tx claiming both HTLCs { @@ -386,6 +475,7 @@ fn test_set_outpoints_partial_claiming() { // Connect blocks on node B connect_blocks(&nodes[1], 135); check_closed_broadcast!(nodes[1], true); + check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed); check_added_monitors!(nodes[1], 1); // Verify node B broadcast 2 HTLC-timeout txn let partial_claim_tx = { @@ -428,3 +518,116 @@ fn test_set_outpoints_partial_claiming() { node_txn.clear(); } } + +fn do_test_to_remote_after_local_detection(style: ConnectStyle) { + // In previous code, detection of to_remote outputs in a counterparty commitment transaction + // was dependent on whether a local commitment transaction had been seen on-chain previously. + // This resulted in some edge cases around not being able to generate a SpendableOutput event + // after a reorg. + // + // Here, we test this by first confirming one set of commitment transactions, then + // disconnecting them and reconnecting another. We then confirm them and check that the correct + // SpendableOutput event is generated. + let chanmon_cfgs = create_chanmon_cfgs(2); + let node_cfgs = create_node_cfgs(2, &chanmon_cfgs); + let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]); + let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs); + + *nodes[0].connect_style.borrow_mut() = style; + *nodes[1].connect_style.borrow_mut() = style; + + let (_, _, chan_id, funding_tx) = + create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 100_000_000, InitFeatures::known(), InitFeatures::known()); + let funding_outpoint = OutPoint { txid: funding_tx.txid(), index: 0 }; + assert_eq!(funding_outpoint.to_channel_id(), chan_id); + + let remote_txn_a = get_local_commitment_txn!(nodes[0], chan_id); + let remote_txn_b = get_local_commitment_txn!(nodes[1], chan_id); + + mine_transaction(&nodes[0], &remote_txn_a[0]); + mine_transaction(&nodes[1], &remote_txn_a[0]); + + assert!(nodes[0].node.list_channels().is_empty()); + check_closed_broadcast!(nodes[0], true); + check_added_monitors!(nodes[0], 1); + check_closed_event!(nodes[0], 1, ClosureReason::CommitmentTxConfirmed); + assert!(nodes[1].node.list_channels().is_empty()); + check_closed_broadcast!(nodes[1], true); + check_added_monitors!(nodes[1], 1); + check_closed_event!(nodes[1], 1, ClosureReason::CommitmentTxConfirmed); + + // Drop transactions broadcasted in response to the first commitment transaction (we have good + // test coverage of these things already elsewhere). + assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0).len(), 1); + assert_eq!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0).len(), 1); + + assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty()); + assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty()); + + disconnect_blocks(&nodes[0], 1); + disconnect_blocks(&nodes[1], 1); + + assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty()); + assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty()); + assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty()); + assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty()); + + connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1); + connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1); + + assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty()); + assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty()); + assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty()); + assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty()); + + mine_transaction(&nodes[0], &remote_txn_b[0]); + mine_transaction(&nodes[1], &remote_txn_b[0]); + + assert!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty()); + assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty()); + assert!(nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty()); + assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty()); + + connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1); + connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1); + + let mut node_a_spendable = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_events(); + assert_eq!(node_a_spendable.len(), 1); + if let Event::SpendableOutputs { outputs } = node_a_spendable.pop().unwrap() { + assert_eq!(outputs.len(), 1); + let spend_tx = nodes[0].keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(), + Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, &Secp256k1::new()).unwrap(); + check_spends!(spend_tx, remote_txn_b[0]); + } + + // nodes[1] is waiting for the to_self_delay to expire, which is many more than + // ANTI_REORG_DELAY. Instead, walk it back and confirm the original remote_txn_a commitment + // again and check that nodes[1] generates a similar spendable output. + // Technically a reorg of ANTI_REORG_DELAY violates our assumptions, so this is undefined by + // our API spec, but we currently handle this correctly and there's little reason we shouldn't + // in the future. + assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty()); + disconnect_blocks(&nodes[1], ANTI_REORG_DELAY); + mine_transaction(&nodes[1], &remote_txn_a[0]); + connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1); + + let mut node_b_spendable = nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events(); + assert_eq!(node_b_spendable.len(), 1); + if let Event::SpendableOutputs { outputs } = node_b_spendable.pop().unwrap() { + assert_eq!(outputs.len(), 1); + let spend_tx = nodes[1].keys_manager.backing.spend_spendable_outputs(&[&outputs[0]], Vec::new(), + Builder::new().push_opcode(opcodes::all::OP_RETURN).into_script(), 253, &Secp256k1::new()).unwrap(); + check_spends!(spend_tx, remote_txn_a[0]); + } +} + +#[test] +fn test_to_remote_after_local_detection() { + do_test_to_remote_after_local_detection(ConnectStyle::BestBlockFirst); + do_test_to_remote_after_local_detection(ConnectStyle::BestBlockFirstSkippingBlocks); + do_test_to_remote_after_local_detection(ConnectStyle::BestBlockFirstReorgsOnlyTip); + do_test_to_remote_after_local_detection(ConnectStyle::TransactionsFirst); + do_test_to_remote_after_local_detection(ConnectStyle::TransactionsFirstSkippingBlocks); + do_test_to_remote_after_local_detection(ConnectStyle::TransactionsFirstReorgsOnlyTip); + do_test_to_remote_after_local_detection(ConnectStyle::FullBlockViaListen); +}