X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fln%2Freorg_tests.rs;h=7845c089cf9fa71758a2af8de5272fc1b481e6ae;hb=ad4459080e823d4e61de92add5f8b2748dcdc88c;hp=b19a355d8f1acd6eca7115c79334f4788ee7fed6;hpb=4cd2e4e94b980b1830337dc7aa2ebb6de881ccf8;p=rust-lightning diff --git a/lightning/src/ln/reorg_tests.rs b/lightning/src/ln/reorg_tests.rs index b19a355d..7845c089 100644 --- a/lightning/src/ln/reorg_tests.rs +++ b/lightning/src/ln/reorg_tests.rs @@ -10,21 +10,24 @@ //! Further functional tests which test blockchain reorganizations. use chain::channelmonitor::{ANTI_REORG_DELAY, ChannelMonitor}; -use chain::Watch; +use chain::transaction::OutPoint; +use chain::{Confirm, Watch}; use ln::channelmanager::{ChannelManager, ChannelManagerReadArgs}; use ln::features::InitFeatures; use ln::msgs::{ChannelMessageHandler, ErrorAction, HTLCFailChannelUpdate}; -use util::config::UserConfig; use util::enforcing_trait_impls::EnforcingSigner; -use util::events::{Event, EventsProvider, MessageSendEvent, MessageSendEventsProvider}; +use util::events::{Event, MessageSendEvent, MessageSendEventsProvider}; 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 std::collections::HashMap; -use std::mem; +use prelude::*; +use core::mem; use ln::functional_test_utils::*; @@ -52,14 +55,19 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()); let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known()); - let (our_payment_preimage, our_payment_hash) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1000000); + // Make sure all nodes are at the same starting height + connect_blocks(&nodes[0], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[0].best_block_info().1); + 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); // Provide preimage to node 2 by claiming payment - nodes[2].node.claim_funds(our_payment_preimage, &None, 1000000); + nodes[2].node.claim_funds(our_payment_preimage); check_added_monitors!(nodes[2], 1); get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id()); - let header = BlockHeader { version: 0x2000_0000, prev_blockhash: Default::default(), 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: Default::default(), 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); @@ -69,9 +77,9 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { check_spends!(node_1_commitment_txn[1], node_1_commitment_txn[0]); // Give node 2 node 1's transactions and get its response (claiming the HTLC instead). - connect_block(&nodes[2], &Block { header, txdata: node_1_commitment_txn.clone() }, CHAN_CONFIRM_DEPTH + 1); + connect_block(&nodes[2], &Block { header, txdata: node_1_commitment_txn.clone() }); check_added_monitors!(nodes[2], 1); - check_closed_broadcast!(nodes[2], false); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate) + 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(); 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) @@ -79,8 +87,11 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { check_spends!(node_2_commitment_txn[2], node_2_commitment_txn[1]); check_spends!(node_2_commitment_txn[0], node_1_commitment_txn[0]); + // Make sure node 1's height is the same as the !local_commitment case + connect_blocks(&nodes[1], 1); // Confirm node 1's commitment txn (and HTLC-Timeout) on node 1 - connect_block(&nodes[1], &Block { header, txdata: node_1_commitment_txn.clone() }, CHAN_CONFIRM_DEPTH + 1); + header.prev_blockhash = nodes[1].best_block_hash(); + connect_block(&nodes[1], &Block { header, txdata: node_1_commitment_txn.clone() }); // ...but return node 1's commitment tx in case claim is set and we're preparing to reorg vec![node_1_commitment_txn[0].clone(), node_2_commitment_txn[0].clone()] @@ -93,59 +104,47 @@ fn do_test_onchain_htlc_reorg(local_commitment: bool, claim: bool) { check_spends!(node_2_commitment_txn[1], node_2_commitment_txn[0]); // Give node 1 node 2's commitment transaction and get its response (timing the HTLC out) - connect_block(&nodes[1], &Block { header, txdata: vec![node_2_commitment_txn[0].clone()] }, CHAN_CONFIRM_DEPTH + 1); - let node_1_commitment_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap(); - assert_eq!(node_1_commitment_txn.len(), 3); // ChannelMonitor: 1 offered HTLC-Timeout, ChannelManger: 1 local commitment tx, 1 Offered HTLC-Timeout - assert_eq!(node_1_commitment_txn[1].output.len(), 2); // to-local and Offered HTLC (to-remote is dust) - check_spends!(node_1_commitment_txn[1], chan_2.3); - check_spends!(node_1_commitment_txn[2], node_1_commitment_txn[1]); - check_spends!(node_1_commitment_txn[0], node_2_commitment_txn[0]); + mine_transaction(&nodes[1], &node_2_commitment_txn[0]); + connect_blocks(&nodes[1], TEST_FINAL_CLTV - 1); // Confirm blocks until the HTLC expires + let node_1_commitment_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().clone(); + assert_eq!(node_1_commitment_txn.len(), 2); // ChannelMonitor: 1 offered HTLC-Timeout, ChannelManger: 1 local commitment tx + assert_eq!(node_1_commitment_txn[0].output.len(), 2); // to-local and Offered HTLC (to-remote is dust) + 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 - connect_block(&nodes[1], &Block { header, txdata: vec![node_2_commitment_txn[0].clone(), node_1_commitment_txn[0].clone()] }, CHAN_CONFIRM_DEPTH + 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); // ...but return node 2's commitment tx (and claim) in case claim is set and we're preparing to reorg node_2_commitment_txn }; check_added_monitors!(nodes[1], 1); - check_closed_broadcast!(nodes[1], false); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate) - let mut block = Block { header, txdata: vec![] }; - let mut blocks = Vec::new(); - blocks.push(block.clone()); - // At CHAN_CONFIRM_DEPTH + 1 we have a confirmation count of 1, so CHAN_CONFIRM_DEPTH + - // ANTI_REORG_DELAY - 1 will give us a confirmation count of ANTI_REORG_DELAY - 1. - for i in CHAN_CONFIRM_DEPTH + 2..CHAN_CONFIRM_DEPTH + ANTI_REORG_DELAY - 1 { - block = Block { - header: BlockHeader { version: 0x20000000, prev_blockhash: block.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }, - txdata: vec![], - }; - connect_block(&nodes[1], &block, i); - blocks.push(block.clone()); - } + check_closed_broadcast!(nodes[1], true); // We should get a BroadcastChannelUpdate (and *only* a BroadcstChannelUpdate) + // 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 { - // Now reorg back to CHAN_CONFIRM_DEPTH and confirm node 2's broadcasted transactions: - for (height, block) in (CHAN_CONFIRM_DEPTH + 1..CHAN_CONFIRM_DEPTH + ANTI_REORG_DELAY - 1).zip(blocks.iter()).rev() { - disconnect_block(&nodes[1], &block.header, height); - } + disconnect_blocks(&nodes[1], ANTI_REORG_DELAY - 2); - block = Block { - header: BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }, + let block = Block { + header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }, txdata: claim_txn, }; - connect_block(&nodes[1], &block, CHAN_CONFIRM_DEPTH + 1); + 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); } else { // Confirm the timeout tx and check that we fail the HTLC backwards - block = Block { - header: BlockHeader { version: 0x20000000, prev_blockhash: block.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }, + let block = Block { + header: BlockHeader { version: 0x20000000, prev_blockhash: nodes[1].best_block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }, txdata: vec![], }; - connect_block(&nodes[1], &block, CHAN_CONFIRM_DEPTH + ANTI_REORG_DELAY); + connect_block(&nodes[1], &block); expect_pending_htlcs_forwardable!(nodes[1]); } @@ -189,7 +188,7 @@ fn test_onchain_htlc_timeout_delay_remote_commitment() { do_test_onchain_htlc_reorg(false, false); } -fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool) { +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 // around freeing background events which store monitor updates during block_[dis]connected. @@ -200,25 +199,29 @@ fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool) { let new_chain_monitor: test_utils::TestChainMonitor; let nodes_0_deserialized: ChannelManager; let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs); - let chan_id = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()).2; + *nodes[0].connect_style.borrow_mut() = connect_style; + + let chan = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()); 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); mem::drop(channel_state); - let mut headers = Vec::new(); - let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; - headers.push(header.clone()); - for _i in 2..100 { - header = BlockHeader { version: 0x20000000, prev_blockhash: header.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; - headers.push(header.clone()); - } if !reorg_after_reload { - while !headers.is_empty() { - nodes[0].node.block_disconnected(&headers.pop().unwrap()); + if use_funding_unconfirmed { + 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 { + 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."); } - check_closed_broadcast!(nodes[0], false); + check_added_monitors!(nodes[1], 1); { let channel_state = nodes[0].node.channel_state.lock().unwrap(); assert_eq!(channel_state.by_id.len(), 0); @@ -245,14 +248,13 @@ fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool) { assert!(chan_0_monitor_read.is_empty()); let mut nodes_0_read = &nodes_0_serialized[..]; - let config = UserConfig::default(); nodes_0_deserialized = { let mut channel_monitors = HashMap::new(); channel_monitors.insert(chan_0_monitor.get_funding_txo().0, &mut chan_0_monitor); <(BlockHash, ChannelManager)>::read( &mut nodes_0_read, ChannelManagerReadArgs { - default_config: config, + default_config: *nodes[0].node.get_current_default_configuration(), keys_manager, fee_estimator: node_cfgs[0].fee_estimator, chain_monitor: nodes[0].chain_monitor, @@ -263,36 +265,77 @@ fn do_test_unconf_chan(reload_node: bool, reorg_after_reload: bool) { }; nodes[0].node = &nodes_0_deserialized; assert!(nodes_0_read.is_empty()); + if !reorg_after_reload { + // If the channel is already closed when we reload the node, we'll broadcast a closing + // transaction via the ChannelMonitor which is missing a corresponding channel. + assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1); + nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear(); + } nodes[0].chain_monitor.watch_channel(chan_0_monitor.get_funding_txo().0.clone(), chan_0_monitor).unwrap(); check_added_monitors!(nodes[0], 1); } if reorg_after_reload { - while !headers.is_empty() { - nodes[0].node.block_disconnected(&headers.pop().unwrap()); + if use_funding_unconfirmed { + 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 { + disconnect_all_blocks(&nodes[0]); } - check_closed_broadcast!(nodes[0], false); + 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."); + } + 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); } } - // With expect_channel_force_closed set the TestChainMonitor will enforce that the next update // is a ChannelForcClosed on the right channel with should_broadcast set. - *nodes[0].chain_monitor.expect_channel_force_closed.lock().unwrap() = Some((chan_id, true)); + *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); + assert_eq!(nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().len(), 1); + nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().clear(); + + // Now check that we can create a new channel + create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()); + send_payment(&nodes[0], &[&nodes[1]], 8000000); } #[test] fn test_unconf_chan() { - do_test_unconf_chan(true, true); - do_test_unconf_chan(false, true); - do_test_unconf_chan(true, false); - do_test_unconf_chan(false, false); + do_test_unconf_chan(true, true, false, ConnectStyle::BestBlockFirstSkippingBlocks); + 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); +} + +#[test] +fn test_unconf_chan_via_listen() { + do_test_unconf_chan(true, true, false, ConnectStyle::FullBlockViaListen); + do_test_unconf_chan(false, true, false, ConnectStyle::FullBlockViaListen); + do_test_unconf_chan(true, false, false, ConnectStyle::FullBlockViaListen); + do_test_unconf_chan(false, false, false, ConnectStyle::FullBlockViaListen); +} + +#[test] +fn test_unconf_chan_via_funding_unconfirmed() { + do_test_unconf_chan(true, true, true, ConnectStyle::BestBlockFirstSkippingBlocks); + do_test_unconf_chan(false, true, true, ConnectStyle::BestBlockFirstSkippingBlocks); + 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::FullBlockViaListen); + do_test_unconf_chan(false, true, true, ConnectStyle::FullBlockViaListen); + do_test_unconf_chan(true, false, true, ConnectStyle::FullBlockViaListen); + do_test_unconf_chan(false, false, true, ConnectStyle::FullBlockViaListen); } #[test] @@ -319,18 +362,16 @@ fn test_set_outpoints_partial_claiming() { check_spends!(remote_txn[2], remote_txn[0]); // Connect blocks on node A to advance height towards TEST_FINAL_CLTV - let prev_header_100 = connect_blocks(&nodes[1], 100, 0, false, Default::default()); // Provide node A with both preimage - nodes[0].node.claim_funds(payment_preimage_1, &None, 3_000_000); - nodes[0].node.claim_funds(payment_preimage_2, &None, 3_000_000); + nodes[0].node.claim_funds(payment_preimage_1); + nodes[0].node.claim_funds(payment_preimage_2); 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 - let header = BlockHeader { version: 0x20000000, prev_blockhash: prev_header_100, merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; - connect_block(&nodes[0], &Block { header, txdata: vec![remote_txn[0].clone()] }, 101); - check_closed_broadcast!(nodes[0], false); + mine_transaction(&nodes[0], &remote_txn[0]); + check_closed_broadcast!(nodes[0], true); check_added_monitors!(nodes[0], 1); // Verify node A broadcast tx claiming both HTLCs { @@ -346,8 +387,8 @@ fn test_set_outpoints_partial_claiming() { } // Connect blocks on node B - connect_blocks(&nodes[1], 135, 0, false, Default::default()); - check_closed_broadcast!(nodes[1], false); + connect_blocks(&nodes[1], 135); + check_closed_broadcast!(nodes[1], true); check_added_monitors!(nodes[1], 1); // Verify node B broadcast 2 HTLC-timeout txn let partial_claim_tx = { @@ -361,8 +402,7 @@ fn test_set_outpoints_partial_claiming() { }; // Broadcast partial claim on node A, should regenerate a claiming tx with HTLC dropped - let header = BlockHeader { version: 0x20000000, prev_blockhash: header.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; - connect_block(&nodes[0], &Block { header, txdata: vec![partial_claim_tx.clone()] }, 102); + mine_transaction(&nodes[0], &partial_claim_tx); { let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap(); assert_eq!(node_txn.len(), 1); @@ -373,7 +413,7 @@ fn test_set_outpoints_partial_claiming() { nodes[0].node.get_and_clear_pending_msg_events(); // Disconnect last block on node A, should regenerate a claiming tx with HTLC dropped - disconnect_block(&nodes[0], &header, 102); + disconnect_blocks(&nodes[0], 1); { let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap(); assert_eq!(node_txn.len(), 1); @@ -383,11 +423,120 @@ fn test_set_outpoints_partial_claiming() { } //// Disconnect one more block and then reconnect multiple no transaction should be generated - disconnect_block(&nodes[0], &header, 101); - connect_blocks(&nodes[1], 15, 101, false, prev_header_100); + disconnect_blocks(&nodes[0], 1); + connect_blocks(&nodes[0], 15); { let mut node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap(); assert_eq!(node_txn.len(), 0); 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); + assert!(nodes[1].node.list_channels().is_empty()); + check_closed_broadcast!(nodes[1], true); + check_added_monitors!(nodes[1], 1); + + // 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::TransactionsFirst); + do_test_to_remote_after_local_detection(ConnectStyle::TransactionsFirstSkippingBlocks); + do_test_to_remote_after_local_detection(ConnectStyle::FullBlockViaListen); +}