X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=src%2Fln%2Fchannelmanager.rs;h=af27a3f32134bd13a26805b887e8bc2758cb3b58;hb=4e4fa56e2b52971271ccddf56e8195d96b1c69ba;hp=e9f49bfbd2f7fb90a3300e68ddcd9c667ca69e0a;hpb=01c8e4f56fed86fdca842a03968741549b336bc1;p=rust-lightning diff --git a/src/ln/channelmanager.rs b/src/ln/channelmanager.rs index e9f49bfb..af27a3f3 100644 --- a/src/ln/channelmanager.rs +++ b/src/ln/channelmanager.rs @@ -369,7 +369,7 @@ impl ChannelManager { }; let channel = Channel::new_outbound(&*self.fee_estimator, chan_keys, their_network_key, channel_value_satoshis, push_msat, self.announce_channels_publicly, user_id, Arc::clone(&self.logger))?; - let res = channel.get_open_channel(self.genesis_hash.clone(), &*self.fee_estimator)?; + let res = channel.get_open_channel(self.genesis_hash.clone(), &*self.fee_estimator); let mut channel_state = self.channel_state.lock().unwrap(); match channel_state.by_id.insert(channel.channel_id(), channel) { Some(_) => panic!("RNG is bad???"), @@ -2198,6 +2198,7 @@ mod tests { use bitcoin::util::hash::Sha256dHash; use bitcoin::blockdata::block::{Block, BlockHeader}; use bitcoin::blockdata::transaction::{Transaction, TxOut}; + use bitcoin::blockdata::transaction::OutPoint as BitcoinOutPoint; use bitcoin::blockdata::constants::genesis_block; use bitcoin::network::constants::Network; use bitcoin::network::serialize::serialize; @@ -2614,6 +2615,54 @@ mod tests { } } + macro_rules! commitment_signed_dance { + ($node_a: expr, $node_b: expr, $commitment_signed: expr, $fail_backwards: expr) => { + { + { + let added_monitors = $node_a.chan_monitor.added_monitors.lock().unwrap(); + assert!(added_monitors.is_empty()); + } + let (as_revoke_and_ack, as_commitment_signed) = $node_a.node.handle_commitment_signed(&$node_b.node.get_our_node_id(), &$commitment_signed).unwrap(); + { + let mut added_monitors = $node_a.chan_monitor.added_monitors.lock().unwrap(); + assert_eq!(added_monitors.len(), 1); + added_monitors.clear(); + } + { + let added_monitors = $node_b.chan_monitor.added_monitors.lock().unwrap(); + assert!(added_monitors.is_empty()); + } + assert!($node_b.node.handle_revoke_and_ack(&$node_a.node.get_our_node_id(), &as_revoke_and_ack).unwrap().is_none()); + { + let mut added_monitors = $node_b.chan_monitor.added_monitors.lock().unwrap(); + assert_eq!(added_monitors.len(), 1); + added_monitors.clear(); + } + let (bs_revoke_and_ack, bs_none) = $node_b.node.handle_commitment_signed(&$node_a.node.get_our_node_id(), &as_commitment_signed.unwrap()).unwrap(); + assert!(bs_none.is_none()); + { + let mut added_monitors = $node_b.chan_monitor.added_monitors.lock().unwrap(); + assert_eq!(added_monitors.len(), 1); + added_monitors.clear(); + } + if $fail_backwards { + assert!($node_a.node.get_and_clear_pending_events().is_empty()); + } + assert!($node_a.node.handle_revoke_and_ack(&$node_b.node.get_our_node_id(), &bs_revoke_and_ack).unwrap().is_none()); + { + let mut added_monitors = $node_a.chan_monitor.added_monitors.lock().unwrap(); + if $fail_backwards { + assert_eq!(added_monitors.len(), 2); + assert!(added_monitors[0].0 != added_monitors[1].0); + } else { + assert_eq!(added_monitors.len(), 1); + } + added_monitors.clear(); + } + } + } + } + fn send_along_route(origin_node: &Node, route: Route, expected_route: &[&Node], recv_value: u64) -> ([u8; 32], [u8; 32]) { let our_payment_preimage = [*origin_node.network_payment_count.borrow(); 32]; *origin_node.network_payment_count.borrow_mut() += 1; @@ -2648,26 +2697,7 @@ mod tests { assert_eq!(added_monitors.len(), 0); } - let revoke_and_ack = node.node.handle_commitment_signed(&prev_node.node.get_our_node_id(), &payment_event.commitment_msg).unwrap(); - { - let mut added_monitors = node.chan_monitor.added_monitors.lock().unwrap(); - assert_eq!(added_monitors.len(), 1); - added_monitors.clear(); - } - assert!(prev_node.node.handle_revoke_and_ack(&node.node.get_our_node_id(), &revoke_and_ack.0).unwrap().is_none()); - let prev_revoke_and_ack = prev_node.node.handle_commitment_signed(&node.node.get_our_node_id(), &revoke_and_ack.1.unwrap()).unwrap(); - { - let mut added_monitors = prev_node.chan_monitor.added_monitors.lock().unwrap(); - assert_eq!(added_monitors.len(), 2); - added_monitors.clear(); - } - assert!(node.node.handle_revoke_and_ack(&prev_node.node.get_our_node_id(), &prev_revoke_and_ack.0).unwrap().is_none()); - assert!(prev_revoke_and_ack.1.is_none()); - { - let mut added_monitors = node.chan_monitor.added_monitors.lock().unwrap(); - assert_eq!(added_monitors.len(), 1); - added_monitors.clear(); - } + commitment_signed_dance!(node, prev_node, payment_event.commitment_msg, false); let events_1 = node.node.get_and_clear_pending_events(); assert_eq!(events_1.len(), 1); @@ -2727,26 +2757,7 @@ mod tests { } added_monitors.clear(); } - let revoke_and_commit = $node.node.handle_commitment_signed(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().1).unwrap(); - { - let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap(); - assert_eq!(added_monitors.len(), 1); - added_monitors.clear(); - } - assert!($prev_node.node.handle_revoke_and_ack(&$node.node.get_our_node_id(), &revoke_and_commit.0).unwrap().is_none()); - let revoke_and_ack = $prev_node.node.handle_commitment_signed(&$node.node.get_our_node_id(), &revoke_and_commit.1.unwrap()).unwrap(); - assert!(revoke_and_ack.1.is_none()); - { - let mut added_monitors = $prev_node.chan_monitor.added_monitors.lock().unwrap(); - assert_eq!(added_monitors.len(), 2); - added_monitors.clear(); - } - assert!($node.node.handle_revoke_and_ack(&$prev_node.node.get_our_node_id(), &revoke_and_ack.0).unwrap().is_none()); - { - let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap(); - assert_eq!(added_monitors.len(), 1); - added_monitors.clear(); - } + commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, false); } } } @@ -2843,38 +2854,7 @@ mod tests { ($node: expr, $prev_node: expr, $last_node: expr) => { { $node.node.handle_update_fail_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0).unwrap(); - let revoke_and_commit = $node.node.handle_commitment_signed(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().1).unwrap(); - - { - let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap(); - assert_eq!(added_monitors.len(), 1); - added_monitors.clear(); - } - assert!($prev_node.node.handle_revoke_and_ack(&$node.node.get_our_node_id(), &revoke_and_commit.0).unwrap().is_none()); - { - let mut added_monitors = $prev_node.chan_monitor.added_monitors.lock().unwrap(); - assert_eq!(added_monitors.len(), 1); - added_monitors.clear(); - } - let revoke_and_ack = $prev_node.node.handle_commitment_signed(&$node.node.get_our_node_id(), &revoke_and_commit.1.unwrap()).unwrap(); - { - let mut added_monitors = $prev_node.chan_monitor.added_monitors.lock().unwrap(); - assert_eq!(added_monitors.len(), 1); - added_monitors.clear(); - } - assert!(revoke_and_ack.1.is_none()); - assert!($node.node.get_and_clear_pending_events().is_empty()); - assert!($node.node.handle_revoke_and_ack(&$prev_node.node.get_our_node_id(), &revoke_and_ack.0).unwrap().is_none()); - { - let mut added_monitors = $node.chan_monitor.added_monitors.lock().unwrap(); - if $last_node { - assert_eq!(added_monitors.len(), 1); - } else { - assert_eq!(added_monitors.len(), 2); - assert!(added_monitors[0].0 != added_monitors[1].0); - } - added_monitors.clear(); - } + commitment_signed_dance!($node, $prev_node, next_msgs.as_ref().unwrap().1, !$last_node); } } } @@ -3093,32 +3073,41 @@ mod tests { #[derive(PartialEq)] enum HTLCType { NONE, TIMEOUT, SUCCESS } - #[derive(PartialEq)] - enum PenaltyType { NONE, HTLC } - fn test_txn_broadcast(node: &Node, chan: &(msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction), commitment_tx: Option, revoked_tx: Option, has_htlc_tx: HTLCType, has_penalty_tx: PenaltyType) -> Vec { + /// Tests that the given node has broadcast transactions for the given Channel + /// + /// First checks that the latest local commitment tx has been broadcast, unless an explicit + /// commitment_tx is provided, which may be used to test that a remote commitment tx was + /// broadcast and the revoked outputs were claimed. + /// + /// Next tests that there is (or is not) a transaction that spends the commitment transaction + /// that appears to be the type of HTLC transaction specified in has_htlc_tx. + /// + /// All broadcast transactions must be accounted for in one of the above three types of we'll + /// also fail. + fn test_txn_broadcast(node: &Node, chan: &(msgs::ChannelUpdate, msgs::ChannelUpdate, [u8; 32], Transaction), commitment_tx: Option, has_htlc_tx: HTLCType) -> Vec { let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap(); - assert!(node_txn.len() >= if has_htlc_tx == HTLCType::NONE { 0 } else { 1 } + if has_penalty_tx == PenaltyType::NONE { 0 } else { 1 }); + assert!(node_txn.len() >= if commitment_tx.is_some() { 0 } else { 1 } + if has_htlc_tx == HTLCType::NONE { 0 } else { 1 }); let mut res = Vec::with_capacity(2); - - if let Some(explicit_tx) = commitment_tx { - res.push(explicit_tx.clone()); - } else { - for tx in node_txn.iter() { - if tx.input.len() == 1 && tx.input[0].previous_output.txid == chan.3.txid() { - let mut funding_tx_map = HashMap::new(); - funding_tx_map.insert(chan.3.txid(), chan.3.clone()); - tx.verify(&funding_tx_map).unwrap(); + node_txn.retain(|tx| { + if tx.input.len() == 1 && tx.input[0].previous_output.txid == chan.3.txid() { + let mut funding_tx_map = HashMap::new(); + funding_tx_map.insert(chan.3.txid(), chan.3.clone()); + tx.verify(&funding_tx_map).unwrap(); + if commitment_tx.is_none() { res.push(tx.clone()); } - } - } - if !revoked_tx.is_some() && !(has_penalty_tx == PenaltyType::HTLC) { - assert_eq!(res.len(), 1); + false + } else { true } + }); + if let Some(explicit_tx) = commitment_tx { + res.push(explicit_tx.clone()); } + assert_eq!(res.len(), 1); + if has_htlc_tx != HTLCType::NONE { - for tx in node_txn.iter() { + node_txn.retain(|tx| { if tx.input.len() == 1 && tx.input[0].previous_output.txid == res[0].txid() { let mut funding_tx_map = HashMap::new(); funding_tx_map.insert(res[0].txid(), res[0].clone()); @@ -3129,29 +3118,32 @@ mod tests { assert!(tx.lock_time == 0); } res.push(tx.clone()); - break; - } - } + false + } else { true } + }); assert_eq!(res.len(), 2); } - if has_penalty_tx == PenaltyType::HTLC { - let revoked_tx = revoked_tx.unwrap(); - for tx in node_txn.iter() { - if tx.input.len() == 1 && tx.input[0].previous_output.txid == revoked_tx.txid() { - let mut funding_tx_map = HashMap::new(); - funding_tx_map.insert(revoked_tx.txid(), revoked_tx.clone()); - tx.verify(&funding_tx_map).unwrap(); - res.push(tx.clone()); - break; - } - } - assert_eq!(res.len(), 1); - } - node_txn.clear(); + assert!(node_txn.is_empty()); res } + /// Tests that the given node has broadcast a claim transaction against the provided revoked + /// HTLC transaction. + fn test_revoked_htlc_claim_txn_broadcast(node: &Node, revoked_tx: Transaction) { + let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap(); + assert_eq!(node_txn.len(), 1); + node_txn.retain(|tx| { + if tx.input.len() == 1 && tx.input[0].previous_output.txid == revoked_tx.txid() { + let mut funding_tx_map = HashMap::new(); + funding_tx_map.insert(revoked_tx.txid(), revoked_tx.clone()); + tx.verify(&funding_tx_map).unwrap(); + false + } else { true } + }); + assert!(node_txn.is_empty()); + } + fn check_preimage_claim(node: &Node, prev_txn: &Vec) -> Vec { let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap(); @@ -3225,10 +3217,10 @@ mod tests { // Simple case with no pending HTLCs: nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), true); { - let mut node_txn = test_txn_broadcast(&nodes[1], &chan_1, None, None, HTLCType::NONE, PenaltyType::NONE); + let mut node_txn = test_txn_broadcast(&nodes[1], &chan_1, None, HTLCType::NONE); let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; nodes[0].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn.drain(..).next().unwrap()] }, 1); - test_txn_broadcast(&nodes[0], &chan_1, None, None, HTLCType::NONE, PenaltyType::NONE); + test_txn_broadcast(&nodes[0], &chan_1, None, HTLCType::NONE); } get_announce_close_broadcast_events(&nodes, 0, 1); assert_eq!(nodes[0].node.list_channels().len(), 0); @@ -3240,10 +3232,10 @@ mod tests { // Simple case of one pending HTLC to HTLC-Timeout nodes[1].node.peer_disconnected(&nodes[2].node.get_our_node_id(), true); { - let mut node_txn = test_txn_broadcast(&nodes[1], &chan_2, None, None, HTLCType::TIMEOUT, PenaltyType::NONE); + let mut node_txn = test_txn_broadcast(&nodes[1], &chan_2, None, HTLCType::TIMEOUT); let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; nodes[2].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn.drain(..).next().unwrap()] }, 1); - test_txn_broadcast(&nodes[2], &chan_2, None, None, HTLCType::NONE, PenaltyType::NONE); + test_txn_broadcast(&nodes[2], &chan_2, None, HTLCType::NONE); } get_announce_close_broadcast_events(&nodes, 1, 2); assert_eq!(nodes[1].node.list_channels().len(), 0); @@ -3277,7 +3269,7 @@ mod tests { // HTLC-Timeout and a nodes[3] claim against it (+ its own announces) nodes[2].node.peer_disconnected(&nodes[3].node.get_our_node_id(), true); { - let node_txn = test_txn_broadcast(&nodes[2], &chan_3, None, None, HTLCType::TIMEOUT, PenaltyType::NONE); + let node_txn = test_txn_broadcast(&nodes[2], &chan_3, None, HTLCType::TIMEOUT); // Claim the payment on nodes[3], giving it knowledge of the preimage claim_funds!(nodes[3], nodes[2], payment_preimage_1); @@ -3302,7 +3294,7 @@ mod tests { nodes[3].chain_monitor.block_connected_checked(&header, i, &Vec::new()[..], &[0; 0]); } - let node_txn = test_txn_broadcast(&nodes[3], &chan_4, None, None, HTLCType::TIMEOUT, PenaltyType::NONE); + let node_txn = test_txn_broadcast(&nodes[3], &chan_4, None, HTLCType::TIMEOUT); // Claim the payment on nodes[4], giving it knowledge of the preimage claim_funds!(nodes[4], nodes[3], payment_preimage_2); @@ -3314,7 +3306,7 @@ mod tests { nodes[4].chain_monitor.block_connected_checked(&header, i, &Vec::new()[..], &[0; 0]); } - test_txn_broadcast(&nodes[4], &chan_4, None, None, HTLCType::SUCCESS, PenaltyType::NONE); + test_txn_broadcast(&nodes[4], &chan_4, None, HTLCType::SUCCESS); header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; nodes[4].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[0].clone()] }, TEST_FINAL_CLTV - 5); @@ -3349,13 +3341,13 @@ mod tests { node_txn[0].verify(&funding_tx_map).unwrap(); node_txn.swap_remove(0); } - test_txn_broadcast(&nodes[1], &chan_5, None, None, HTLCType::NONE, PenaltyType::NONE); + test_txn_broadcast(&nodes[1], &chan_5, None, HTLCType::NONE); nodes[0].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![revoked_local_txn[0].clone()] }, 1); - let node_txn = test_txn_broadcast(&nodes[0], &chan_5, Some(revoked_local_txn[0].clone()), None, HTLCType::TIMEOUT, PenaltyType::NONE); + let node_txn = test_txn_broadcast(&nodes[0], &chan_5, Some(revoked_local_txn[0].clone()), HTLCType::TIMEOUT); header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; nodes[1].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![node_txn[1].clone()] }, 1); - test_txn_broadcast(&nodes[1], &chan_5, None, Some(node_txn[1].clone()), HTLCType::NONE, PenaltyType::HTLC); + test_revoked_htlc_claim_txn_broadcast(&nodes[1], node_txn[1].clone()); } get_announce_close_broadcast_events(&nodes, 0, 1); assert_eq!(nodes[0].node.list_channels().len(), 0); @@ -3368,6 +3360,167 @@ mod tests { } } + #[test] + fn test_htlc_ignore_latest_remote_commitment() { + // Test that HTLC transactions spending the latest remote commitment transaction are simply + // ignored if we cannot claim them. This originally tickled an invalid unwrap(). + let nodes = create_network(2); + create_announced_chan_between_nodes(&nodes, 0, 1); + + route_payment(&nodes[0], &[&nodes[1]], 10000000); + nodes[0].node.force_close_channel(&nodes[0].node.list_channels()[0].channel_id); + { + let events = nodes[0].node.get_and_clear_pending_events(); + assert_eq!(events.len(), 1); + match events[0] { + Event::BroadcastChannelUpdate { msg: msgs::ChannelUpdate { contents: msgs::UnsignedChannelUpdate { flags, .. }, .. } } => { + assert_eq!(flags & 0b10, 0b10); + }, + _ => panic!("Unexpected event"), + } + } + + let node_txn = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap(); + assert_eq!(node_txn.len(), 2); + + let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; + nodes[1].chain_monitor.block_connected_checked(&header, 1, &[&node_txn[0], &node_txn[1]], &[1; 2]); + + { + let events = nodes[1].node.get_and_clear_pending_events(); + assert_eq!(events.len(), 1); + match events[0] { + Event::BroadcastChannelUpdate { msg: msgs::ChannelUpdate { contents: msgs::UnsignedChannelUpdate { flags, .. }, .. } } => { + assert_eq!(flags & 0b10, 0b10); + }, + _ => panic!("Unexpected event"), + } + } + + // Duplicate the block_connected call since this may happen due to other listeners + // registering new transactions + nodes[1].chain_monitor.block_connected_checked(&header, 1, &[&node_txn[0], &node_txn[1]], &[1; 2]); + } + + #[test] + fn test_force_close_fail_back() { + // Check which HTLCs are failed-backwards on channel force-closure + let mut nodes = create_network(3); + create_announced_chan_between_nodes(&nodes, 0, 1); + create_announced_chan_between_nodes(&nodes, 1, 2); + + let route = nodes[0].router.get_route(&nodes[2].node.get_our_node_id(), None, &Vec::new(), 1000000, 42).unwrap(); + + let our_payment_preimage = [*nodes[0].network_payment_count.borrow(); 32]; + *nodes[0].network_payment_count.borrow_mut() += 1; + let our_payment_hash = { + let mut sha = Sha256::new(); + sha.input(&our_payment_preimage[..]); + let mut ret = [0; 32]; + sha.result(&mut ret); + ret + }; + + let mut payment_event = { + nodes[0].node.send_payment(route, our_payment_hash).unwrap(); + { + let mut added_monitors = nodes[0].chan_monitor.added_monitors.lock().unwrap(); + assert_eq!(added_monitors.len(), 1); + added_monitors.clear(); + } + + let mut events = nodes[0].node.get_and_clear_pending_events(); + assert_eq!(events.len(), 1); + SendEvent::from_event(events.remove(0)) + }; + + nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]).unwrap(); + commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false); + + let events_1 = nodes[1].node.get_and_clear_pending_events(); + assert_eq!(events_1.len(), 1); + match events_1[0] { + Event::PendingHTLCsForwardable { .. } => { }, + _ => panic!("Unexpected event"), + }; + + nodes[1].node.channel_state.lock().unwrap().next_forward = Instant::now(); + nodes[1].node.process_pending_htlc_forwards(); + + let mut events_2 = nodes[1].node.get_and_clear_pending_events(); + assert_eq!(events_2.len(), 1); + payment_event = SendEvent::from_event(events_2.remove(0)); + assert_eq!(payment_event.msgs.len(), 1); + + { + let mut added_monitors = nodes[1].chan_monitor.added_monitors.lock().unwrap(); + assert_eq!(added_monitors.len(), 1); + added_monitors.clear(); + } + + nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &payment_event.msgs[0]).unwrap(); + nodes[2].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &payment_event.commitment_msg).unwrap(); + + { + let mut added_monitors = nodes[2].chan_monitor.added_monitors.lock().unwrap(); + assert_eq!(added_monitors.len(), 1); + added_monitors.clear(); + } + + // nodes[2] now has the latest commitment transaction, but hasn't revoked its previous + // state or updated nodes[1]' state. Now force-close and broadcast that commitment/HTLC + // transaction and ensure nodes[1] doesn't fail-backwards (this was originally a bug!). + + nodes[2].node.force_close_channel(&payment_event.commitment_msg.channel_id); + let events_3 = nodes[2].node.get_and_clear_pending_events(); + assert_eq!(events_3.len(), 1); + match events_3[0] { + Event::BroadcastChannelUpdate { msg: msgs::ChannelUpdate { contents: msgs::UnsignedChannelUpdate { flags, .. }, .. } } => { + assert_eq!(flags & 0b10, 0b10); + }, + _ => panic!("Unexpected event"), + } + + let tx = { + let mut node_txn = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap(); + // Note that we don't bother broadcasting the HTLC-Success transaction here as we don't + // have a use for it unless nodes[2] learns the preimage somehow, the funds will go + // back to nodes[1] upon timeout otherwise. + assert_eq!(node_txn.len(), 1); + node_txn.remove(0) + }; + + let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 }; + nodes[1].chain_monitor.block_connected_checked(&header, 1, &[&tx], &[1]); + + let events_4 = nodes[1].node.get_and_clear_pending_events(); + // Note no UpdateHTLCs event here from nodes[1] to nodes[0]! + assert_eq!(events_4.len(), 1); + match events_4[0] { + Event::BroadcastChannelUpdate { msg: msgs::ChannelUpdate { contents: msgs::UnsignedChannelUpdate { flags, .. }, .. } } => { + assert_eq!(flags & 0b10, 0b10); + }, + _ => panic!("Unexpected event"), + } + + // Now check that if we add the preimage to ChannelMonitor it broadcasts our HTLC-Success.. + { + let mut monitors = nodes[2].chan_monitor.simple_monitor.monitors.lock().unwrap(); + monitors.get_mut(&OutPoint::new(Sha256dHash::from(&payment_event.commitment_msg.channel_id[..]), 0)).unwrap() + .provide_payment_preimage(&our_payment_hash, &our_payment_preimage); + } + nodes[2].chain_monitor.block_connected_checked(&header, 1, &[&tx], &[1]); + let node_txn = nodes[2].tx_broadcaster.txn_broadcasted.lock().unwrap(); + assert_eq!(node_txn.len(), 1); + assert_eq!(node_txn[0].input.len(), 1); + assert_eq!(node_txn[0].input[0].previous_output.txid, tx.txid()); + assert_eq!(node_txn[0].lock_time, 0); // Must be an HTLC-Success + assert_eq!(node_txn[0].input[0].witness.len(), 5); // Must be an HTLC-Success + let mut funding_tx_map = HashMap::new(); + funding_tx_map.insert(tx.txid(), tx); + node_txn[0].verify(&funding_tx_map).unwrap(); + } + #[test] fn test_unconf_chan() { // After creating a chan between nodes, we disconnect all blocks previously seen to force a channel close on nodes[0] side