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Handle fallible per commitment point for RAA #3150

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merged 6 commits into from
Jul 16, 2024
Merged

Handle fallible per commitment point for RAA #3150

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516e5e6
Split HolderCommitmentPoint::advance off into separate function
alecchendev Jun 18, 2024
9c2a050
Return an error if we fail to advance our commitment number
alecchendev Jun 18, 2024
1fa67d9
Add logger as parameter in creating ChannelContext
alecchendev May 30, 2024
1f7f3a3
Change get_per_commitment_point to return result type
alecchendev Jun 5, 2024
614da40
Allow failing revoke_and_ack if commitment point is not available
alecchendev Jun 29, 2024
45c0a0f
Test async get per commitment point for revoke_and_ack
alecchendev Jun 30, 2024
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175 changes: 153 additions & 22 deletions lightning/src/ln/async_signer_tests.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -127,6 +127,11 @@ fn test_async_commitment_signature_for_funding_signed() {

#[test]
fn test_async_commitment_signature_for_commitment_signed() {
do_test_async_commitment_signature_for_commitment_signed_revoke_and_ack(true);
do_test_async_commitment_signature_for_commitment_signed_revoke_and_ack(false);
}

fn do_test_async_commitment_signature_for_commitment_signed_revoke_and_ack(enable_sign_counterparty_commit_first: bool) {
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]);
Expand Down Expand Up @@ -154,23 +159,33 @@ fn test_async_commitment_signature_for_commitment_signed() {

// Mark dst's signer as unavailable and handle src's commitment_signed: while dst won't yet have a
// `commitment_signed` of its own to offer, it should publish a `revoke_and_ack`.
dst.disable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::GetPerCommitmentPoint);
dst.disable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::SignCounterpartyCommitment);
dst.node.handle_commitment_signed(&src.node.get_our_node_id(), &payment_event.commitment_msg);
check_added_monitors(dst, 1);

get_event_msg!(dst, MessageSendEvent::SendRevokeAndACK, src.node.get_our_node_id());

// Mark dst's signer as available and retry: we now expect to see dst's `commitment_signed`.
dst.enable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::SignCounterpartyCommitment);
dst.node.signer_unblocked(Some((src.node.get_our_node_id(), chan_id)));

let events = dst.node.get_and_clear_pending_msg_events();
assert_eq!(events.len(), 1, "expected one message, got {}", events.len());
if let MessageSendEvent::UpdateHTLCs { ref node_id, .. } = events[0] {
assert_eq!(node_id, &src.node.get_our_node_id());
if enable_sign_counterparty_commit_first {
// Unblock CS -> no messages should be sent, since we must send RAA first.
dst.enable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::SignCounterpartyCommitment);
dst.node.signer_unblocked(Some((src.node.get_our_node_id(), chan_id)));
let events = dst.node.get_and_clear_pending_msg_events();
assert!(events.is_empty(), "expected no message, got {}", events.len());

// Unblock revoke_and_ack -> we should send both RAA + CS.
dst.enable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::GetPerCommitmentPoint);
dst.node.signer_unblocked(Some((src.node.get_our_node_id(), chan_id)));
get_revoke_commit_msgs(&dst, &src.node.get_our_node_id());
} else {
panic!("expected UpdateHTLCs message, not {:?}", events[0]);
};
// Unblock revoke_and_ack -> we should send just RAA.
dst.enable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::GetPerCommitmentPoint);
dst.node.signer_unblocked(Some((src.node.get_our_node_id(), chan_id)));
get_event_msg!(dst, MessageSendEvent::SendRevokeAndACK, src.node.get_our_node_id());

// Unblock commitment signed -> we should send CS.
dst.enable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::SignCounterpartyCommitment);
dst.node.signer_unblocked(Some((src.node.get_our_node_id(), chan_id)));
get_htlc_update_msgs(dst, &src.node.get_our_node_id());
}
}

#[test]
Expand Down Expand Up @@ -272,9 +287,125 @@ fn test_async_commitment_signature_for_funding_signed_0conf() {
assert_eq!(nodes[1].node.list_usable_channels().len(), 1);
}

#[derive(PartialEq)]
enum UnblockSignerAcrossDisconnectCase {
AtEnd,
BeforeMonitorRestored,
BeforeReestablish,
}

#[test]
fn test_async_raa_peer_disconnect() {
do_test_async_raa_peer_disconnect(UnblockSignerAcrossDisconnectCase::AtEnd);
do_test_async_raa_peer_disconnect(UnblockSignerAcrossDisconnectCase::BeforeMonitorRestored);
do_test_async_raa_peer_disconnect(UnblockSignerAcrossDisconnectCase::BeforeReestablish);
}

fn do_test_async_raa_peer_disconnect(test_case: UnblockSignerAcrossDisconnectCase) {
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_id, _) = create_announced_chan_between_nodes(&nodes, 0, 1);

// Send a payment.
let src = &nodes[0];
let dst = &nodes[1];
let (route, our_payment_hash, _our_payment_preimage, our_payment_secret) = get_route_and_payment_hash!(src, dst, 8000000);
src.node.send_payment_with_route(&route, our_payment_hash,
RecipientOnionFields::secret_only(our_payment_secret), PaymentId(our_payment_hash.0)).unwrap();
check_added_monitors!(src, 1);

// Pass the payment along the route.
let payment_event = {
let mut events = src.node.get_and_clear_pending_msg_events();
assert_eq!(events.len(), 1);
SendEvent::from_event(events.remove(0))
};
assert_eq!(payment_event.node_id, dst.node.get_our_node_id());
assert_eq!(payment_event.msgs.len(), 1);

dst.node.handle_update_add_htlc(&src.node.get_our_node_id(), &payment_event.msgs[0]);

if test_case == UnblockSignerAcrossDisconnectCase::BeforeMonitorRestored {
// Fail to persist the monitor update when handling the commitment_signed.
chanmon_cfgs[1].persister.set_update_ret(ChannelMonitorUpdateStatus::InProgress);
}

// Mark dst's signer as unavailable and handle src's commitment_signed: while dst won't yet have a
// `commitment_signed` of its own to offer, it should publish a `revoke_and_ack`.
dst.disable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::GetPerCommitmentPoint);
dst.node.handle_commitment_signed(&src.node.get_our_node_id(), &payment_event.commitment_msg);
check_added_monitors(dst, 1);

let events = dst.node.get_and_clear_pending_msg_events();
assert!(events.is_empty(), "expected no message, got {}", events.len());

// Now disconnect and reconnect the peers.
src.node.peer_disconnected(&dst.node.get_our_node_id());
dst.node.peer_disconnected(&src.node.get_our_node_id());

// do reestablish stuff
src.node.peer_connected(&dst.node.get_our_node_id(), &msgs::Init {
features: dst.node.init_features(), networks: None, remote_network_address: None
}, true).unwrap();
let reestablish_1 = get_chan_reestablish_msgs!(src, dst);
assert_eq!(reestablish_1.len(), 1);
dst.node.peer_connected(&src.node.get_our_node_id(), &msgs::Init {
features: src.node.init_features(), networks: None, remote_network_address: None
}, false).unwrap();
let reestablish_2 = get_chan_reestablish_msgs!(dst, src);
assert_eq!(reestablish_2.len(), 1);

if test_case == UnblockSignerAcrossDisconnectCase::BeforeReestablish {
// Reenable the signer before the reestablish.
dst.enable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::GetPerCommitmentPoint);
}

dst.node.handle_channel_reestablish(&src.node.get_our_node_id(), &reestablish_1[0]);

if test_case == UnblockSignerAcrossDisconnectCase::BeforeMonitorRestored {
dst.enable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::GetPerCommitmentPoint);
chanmon_cfgs[1].persister.set_update_ret(ChannelMonitorUpdateStatus::Completed);
let (outpoint, latest_update, _) = dst.chain_monitor.latest_monitor_update_id.lock().unwrap().get(&chan_id).unwrap().clone();
dst.chain_monitor.chain_monitor.force_channel_monitor_updated(outpoint, latest_update);
check_added_monitors!(dst, 0);
}

// Expect the RAA
let (_, revoke_and_ack, commitment_signed, resend_order) = handle_chan_reestablish_msgs!(dst, src);
if test_case == UnblockSignerAcrossDisconnectCase::AtEnd {
assert!(revoke_and_ack.is_none());
assert!(commitment_signed.is_none());
} else {
assert!(revoke_and_ack.is_some());
assert!(commitment_signed.is_some());
assert!(resend_order == RAACommitmentOrder::RevokeAndACKFirst);
}

// Mark dst's signer as available and retry: we now expect to see dst's RAA + CS.
dst.enable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::GetPerCommitmentPoint);
dst.node.signer_unblocked(Some((src.node.get_our_node_id(), chan_id)));

if test_case == UnblockSignerAcrossDisconnectCase::AtEnd {
let (_, revoke_and_ack, commitment_signed, resend_order) = handle_chan_reestablish_msgs!(dst, src);
assert!(revoke_and_ack.is_some());
assert!(commitment_signed.is_some());
assert!(resend_order == RAACommitmentOrder::RevokeAndACKFirst);
} else {
// Make sure we don't double send the RAA.
let (_, revoke_and_ack, commitment_signed, _) = handle_chan_reestablish_msgs!(dst, src);
assert!(revoke_and_ack.is_none());
assert!(commitment_signed.is_none());
}
}


#[test]
fn test_async_commitment_signature_peer_disconnect() {
do_test_async_commitment_signature_peer_disconnect(0);
// This tests that if our signer is blocked and gets unblocked
// after a peer disconnect + channel reestablish, we'll send the right messages.
do_test_async_commitment_signature_peer_disconnect(UnblockSignerAcrossDisconnectCase::AtEnd);
}

#[test]
Expand All @@ -283,18 +414,18 @@ fn test_async_commitment_signature_peer_disconnect_signer_restored_before_monito
// and needed to send a CS, that if our signer becomes available before the monitor
// update completes, then we don't send duplicate messages upon calling `signer_unblocked`
// after the monitor update completes.
do_test_async_commitment_signature_peer_disconnect(1);
do_test_async_commitment_signature_peer_disconnect(UnblockSignerAcrossDisconnectCase::BeforeMonitorRestored);
}

#[test]
fn test_async_commitment_signature_peer_disconnect_signer_restored_before_reestablish() {
// This tests that if we tried to send a commitment_signed, but our signer was blocked,
// if we disconnect, reconnect, the signer becomes available, then handle channel_reestablish,
// that we don't send duplicate messages upon calling `signer_unblocked`.
do_test_async_commitment_signature_peer_disconnect(2);
do_test_async_commitment_signature_peer_disconnect(UnblockSignerAcrossDisconnectCase::BeforeReestablish);
}

fn do_test_async_commitment_signature_peer_disconnect(test_case: u8) {
fn do_test_async_commitment_signature_peer_disconnect(test_case: UnblockSignerAcrossDisconnectCase) {
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]);
Expand All @@ -320,7 +451,7 @@ fn do_test_async_commitment_signature_peer_disconnect(test_case: u8) {

dst.node.handle_update_add_htlc(&src.node.get_our_node_id(), &payment_event.msgs[0]);

if test_case == 1 {
if test_case == UnblockSignerAcrossDisconnectCase::BeforeMonitorRestored {
// Fail to persist the monitor update when handling the commitment_signed.
chanmon_cfgs[1].persister.set_update_ret(ChannelMonitorUpdateStatus::InProgress);
}
Expand All @@ -331,7 +462,7 @@ fn do_test_async_commitment_signature_peer_disconnect(test_case: u8) {
dst.node.handle_commitment_signed(&src.node.get_our_node_id(), &payment_event.commitment_msg);
check_added_monitors(dst, 1);

if test_case != 1 {
if test_case != UnblockSignerAcrossDisconnectCase::BeforeMonitorRestored {
get_event_msg!(dst, MessageSendEvent::SendRevokeAndACK, src.node.get_our_node_id());
}

Expand All @@ -351,14 +482,14 @@ fn do_test_async_commitment_signature_peer_disconnect(test_case: u8) {
let reestablish_2 = get_chan_reestablish_msgs!(dst, src);
assert_eq!(reestablish_2.len(), 1);

if test_case == 2 {
if test_case == UnblockSignerAcrossDisconnectCase::BeforeReestablish {
// Reenable the signer before the reestablish.
dst.enable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::SignCounterpartyCommitment);
}

dst.node.handle_channel_reestablish(&src.node.get_our_node_id(), &reestablish_1[0]);

if test_case == 1 {
if test_case == UnblockSignerAcrossDisconnectCase::BeforeMonitorRestored {
dst.enable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::SignCounterpartyCommitment);
chanmon_cfgs[1].persister.set_update_ret(ChannelMonitorUpdateStatus::Completed);
let (outpoint, latest_update, _) = dst.chain_monitor.latest_monitor_update_id.lock().unwrap().get(&chan_id).unwrap().clone();
Expand All @@ -369,7 +500,7 @@ fn do_test_async_commitment_signature_peer_disconnect(test_case: u8) {
// Expect the RAA
let (_, revoke_and_ack, commitment_signed, _) = handle_chan_reestablish_msgs!(dst, src);
assert!(revoke_and_ack.is_some());
if test_case == 0 {
if test_case == UnblockSignerAcrossDisconnectCase::AtEnd {
assert!(commitment_signed.is_none());
} else {
assert!(commitment_signed.is_some());
Expand All @@ -379,7 +510,7 @@ fn do_test_async_commitment_signature_peer_disconnect(test_case: u8) {
dst.enable_channel_signer_op(&src.node.get_our_node_id(), &chan_id, SignerOp::SignCounterpartyCommitment);
dst.node.signer_unblocked(Some((src.node.get_our_node_id(), chan_id)));

if test_case == 0 {
if test_case == UnblockSignerAcrossDisconnectCase::AtEnd {
let (_, _, commitment_signed, _) = handle_chan_reestablish_msgs!(dst, src);
assert!(commitment_signed.is_some());
} else {
Expand Down
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