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Handle fallible per commitment point in channel establishment #3109

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Handle fallible per commitment point in channel establishment #3109

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f49df83
Async signing test util follow ups
alecchendev Jun 18, 2024
cbb4a9e
Move clearing signer funding signed flag to signer_unblocked
alecchendev Jun 10, 2024
3f840f2
Move clearing signer commitment flag to signer_unblocked
alecchendev Jun 10, 2024
df10ff4
Clear signer pending funding created flag
alecchendev Jun 10, 2024
3e1cae5
Add logger as parameter in creating ChannelContext
alecchendev May 30, 2024
cb9ba76
Add HolderCommitmentPoint::Uninitialized
alecchendev Jun 9, 2024
6013f0d
f - improve holder commitment docs
alecchendev Jun 18, 2024
3d2f215
f - fix debug assertion
alecchendev Jun 18, 2024
0c130d9
Split HolderCommitmentPoint::advance off into separate function
alecchendev Jun 18, 2024
4494d96
Return an error if we fail to advance our commitment number
alecchendev Jun 18, 2024
3c82bb5
Change get_per_commitment_point to return result type
alecchendev Jun 5, 2024
a4eb312
Handle fallible commitment point when getting open_channel message
alecchendev Jun 6, 2024
1a76f82
Handle sending open_channel when signer is unblocked
alecchendev Jun 6, 2024
41e4139
f - try_resolve_pending
alecchendev Jun 18, 2024
1e9a36f
Handle fallible commitment point when getting accept_channel
alecchendev Jun 6, 2024
84f4ff3
Handle sending accept_channel when signer is unblocked
alecchendev Jun 6, 2024
02b9f00
f - try_resolve_pending
alecchendev Jun 18, 2024
7bf5c62
Handle fallible commitment point when getting channel_ready
alecchendev Jun 6, 2024
ccbe92d
Handle sending channel_ready when commitment point is unblocked
alecchendev Jun 10, 2024
db9f2e6
f - try_resolve_pending
alecchendev Jun 18, 2024
68f1d8a
Add test for async open and accept channel
alecchendev Jun 11, 2024
b798ffa
f - test unblocking signer ops in different orders for various tests
alecchendev Jun 18, 2024
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98 changes: 86 additions & 12 deletions lightning/src/ln/async_signer_tests.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,59 @@ use crate::ln::channelmanager::{PaymentId, RecipientOnionFields};
use crate::util::test_channel_signer::SignerOp;

#[test]
fn test_async_commitment_signature_for_funding_created() {
fn test_open_channel() {
// Simulate acquiring the signature for `funding_created` asynchronously.
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);

// Open an outbound channel simulating an async signer.
let channel_value_satoshis = 100000;
let user_channel_id = 42;
nodes[0].disable_next_channel_signer_op(SignerOp::GetPerCommitmentPoint);
let channel_id_0 = nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), channel_value_satoshis, 10001, user_channel_id, None, None).unwrap();

{
let msgs = nodes[0].node.get_and_clear_pending_msg_events();
assert!(msgs.is_empty(), "Expected no message events; got {:?}", msgs);
}

nodes[0].enable_channel_signer_op(&nodes[1].node.get_our_node_id(), &channel_id_0, SignerOp::GetPerCommitmentPoint);
nodes[0].node.signer_unblocked(None);

// nodes[0] --- open_channel --> nodes[1]
let mut open_chan_msg = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());

// Handle an inbound channel simulating an async signer.
nodes[1].disable_next_channel_signer_op(SignerOp::GetPerCommitmentPoint);
nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_chan_msg);

{
let msgs = nodes[1].node.get_and_clear_pending_msg_events();
assert!(msgs.is_empty(), "Expected no message events; got {:?}", msgs);
}

let channel_id_1 = {
let channels = nodes[1].node.list_channels();
assert_eq!(channels.len(), 1, "expected one channel, not {}", channels.len());
channels[0].channel_id
};

nodes[1].enable_channel_signer_op(&nodes[0].node.get_our_node_id(), &channel_id_1, SignerOp::GetPerCommitmentPoint);
nodes[1].node.signer_unblocked(None);

// nodes[0] <-- accept_channel --- nodes[1]
get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, nodes[0].node.get_our_node_id());
}

#[test]
fn test_funding_created() {
do_test_funding_created(vec![SignerOp::SignCounterpartyCommitment, SignerOp::GetPerCommitmentPoint]);
do_test_funding_created(vec![SignerOp::GetPerCommitmentPoint, SignerOp::SignCounterpartyCommitment]);
}

fn do_test_funding_created(signer_ops: Vec<SignerOp>) {
// Simulate acquiring the signature for `funding_created` asynchronously.
let chanmon_cfgs = create_chanmon_cfgs(2);
let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
Expand All @@ -44,7 +96,9 @@ fn test_async_commitment_signature_for_funding_created() {
// But! Let's make node[0]'s signer be unavailable: we should *not* broadcast a funding_created
// message...
let (temporary_channel_id, tx, _) = create_funding_transaction(&nodes[0], &nodes[1].node.get_our_node_id(), 100000, 42);
nodes[0].disable_channel_signer_op(&nodes[1].node.get_our_node_id(), &temporary_channel_id, SignerOp::SignCounterpartyCommitment);
for op in signer_ops.iter() {
nodes[0].disable_channel_signer_op(&nodes[1].node.get_our_node_id(), &temporary_channel_id, *op);
}
nodes[0].node.funding_transaction_generated(&temporary_channel_id, &nodes[1].node.get_our_node_id(), tx.clone()).unwrap();
check_added_monitors(&nodes[0], 0);

Expand All @@ -58,8 +112,10 @@ fn test_async_commitment_signature_for_funding_created() {
channels[0].channel_id
};

nodes[0].enable_channel_signer_op(&nodes[1].node.get_our_node_id(), &chan_id, SignerOp::SignCounterpartyCommitment);
nodes[0].node.signer_unblocked(Some((nodes[1].node.get_our_node_id(), chan_id)));
for op in signer_ops.iter() {
nodes[0].enable_channel_signer_op(&nodes[1].node.get_our_node_id(), &chan_id, *op);
nodes[0].node.signer_unblocked(Some((nodes[1].node.get_our_node_id(), chan_id)));
}

let mut funding_created_msg = get_event_msg!(nodes[0], MessageSendEvent::SendFundingCreated, nodes[1].node.get_our_node_id());
nodes[1].node.handle_funding_created(&nodes[0].node.get_our_node_id(), &funding_created_msg);
Expand All @@ -74,7 +130,12 @@ fn test_async_commitment_signature_for_funding_created() {
}

#[test]
fn test_async_commitment_signature_for_funding_signed() {
fn test_funding_signed() {
do_test_funding_signed(vec![SignerOp::SignCounterpartyCommitment, SignerOp::GetPerCommitmentPoint]);
do_test_funding_signed(vec![SignerOp::GetPerCommitmentPoint, SignerOp::SignCounterpartyCommitment]);
}

fn do_test_funding_signed(signer_ops: Vec<SignerOp>) {
// Simulate acquiring the signature for `funding_signed` asynchronously.
let chanmon_cfgs = create_chanmon_cfgs(2);
let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
Expand All @@ -99,7 +160,9 @@ fn test_async_commitment_signature_for_funding_signed() {

// Now let's make node[1]'s signer be unavailable while handling the `funding_created`. It should
// *not* broadcast a `funding_signed`...
nodes[1].disable_channel_signer_op(&nodes[0].node.get_our_node_id(), &temporary_channel_id, SignerOp::SignCounterpartyCommitment);
for op in signer_ops.iter() {
nodes[1].disable_channel_signer_op(&nodes[0].node.get_our_node_id(), &temporary_channel_id, *op);
}
nodes[1].node.handle_funding_created(&nodes[0].node.get_our_node_id(), &funding_created_msg);
check_added_monitors(&nodes[1], 1);

Expand All @@ -112,8 +175,10 @@ fn test_async_commitment_signature_for_funding_signed() {
assert_eq!(channels.len(), 1, "expected one channel, not {}", channels.len());
channels[0].channel_id
};
nodes[1].enable_channel_signer_op(&nodes[0].node.get_our_node_id(), &chan_id, SignerOp::SignCounterpartyCommitment);
nodes[1].node.signer_unblocked(Some((nodes[0].node.get_our_node_id(), chan_id)));
for op in signer_ops.iter() {
nodes[1].enable_channel_signer_op(&nodes[0].node.get_our_node_id(), &chan_id, *op);
nodes[1].node.signer_unblocked(Some((nodes[0].node.get_our_node_id(), chan_id)));
}

expect_channel_pending_event(&nodes[1], &nodes[0].node.get_our_node_id());

Expand Down Expand Up @@ -173,7 +238,12 @@ fn test_async_commitment_signature_for_commitment_signed() {
}

#[test]
fn test_async_commitment_signature_for_funding_signed_0conf() {
fn test_funding_signed_0conf() {
do_test_funding_signed_0conf(vec![SignerOp::SignCounterpartyCommitment, SignerOp::SignCounterpartyCommitment]);
do_test_funding_signed_0conf(vec![SignerOp::SignCounterpartyCommitment, SignerOp::GetPerCommitmentPoint]);
}

fn do_test_funding_signed_0conf(signer_ops: Vec<SignerOp>) {
// Simulate acquiring the signature for `funding_signed` asynchronously for a zero-conf channel.
let mut manually_accept_config = test_default_channel_config();
manually_accept_config.manually_accept_inbound_channels = true;
Expand Down Expand Up @@ -216,7 +286,9 @@ fn test_async_commitment_signature_for_funding_signed_0conf() {

// Now let's make node[1]'s signer be unavailable while handling the `funding_created`. It should
// *not* broadcast a `funding_signed`...
nodes[1].disable_channel_signer_op(&nodes[0].node.get_our_node_id(), &temporary_channel_id, SignerOp::SignCounterpartyCommitment);
for op in signer_ops.iter() {
nodes[1].disable_channel_signer_op(&nodes[0].node.get_our_node_id(), &temporary_channel_id, *op);
}
nodes[1].node.handle_funding_created(&nodes[0].node.get_our_node_id(), &funding_created_msg);
check_added_monitors(&nodes[1], 1);

Expand All @@ -231,8 +303,10 @@ fn test_async_commitment_signature_for_funding_signed_0conf() {
};

// At this point, we basically expect the channel to open like a normal zero-conf channel.
nodes[1].enable_channel_signer_op(&nodes[0].node.get_our_node_id(), &chan_id, SignerOp::SignCounterpartyCommitment);
nodes[1].node.signer_unblocked(Some((nodes[0].node.get_our_node_id(), chan_id)));
for op in signer_ops.iter() {
nodes[1].enable_channel_signer_op(&nodes[0].node.get_our_node_id(), &chan_id, *op);
nodes[1].node.signer_unblocked(Some((nodes[0].node.get_our_node_id(), chan_id)));
}

let (funding_signed, channel_ready_1) = {
let events = nodes[1].node.get_and_clear_pending_msg_events();
Expand Down
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