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Handle tx_abort without using ChannelPhase

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Exposing ChannelPhase in ChannelManager has led to verbose match
statements, which need to be modified each time a ChannelPhase is added.
Making ChannelPhase an implementation detail of Channel would help avoid
this.

As a step in this direction, update ChannelManager::internal_tx_abort to
use ChannelPhase::is_funded and a new ChannelPhase::as_unfunded_v2_mut
method.
This commit is contained in:
Jeffrey Czyz 2025-01-06 18:30:49 -06:00
parent 6f119eb20c
commit 307e0485d2
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GPG key ID: 912EF12EA67705F5
2 changed files with 12 additions and 5 deletions
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8
lightning/src/ln/channel.rs
View file

@ -1180,6 +1180,14 @@ impl<'a, SP: Deref> ChannelPhase<SP> where
None
}
}
pub fn as_unfunded_v2_mut(&mut self) -> Option<&mut PendingV2Channel<SP>> {
if let ChannelPhase::UnfundedV2(channel) = self {
Some(channel)
} else {
None
}
}
}
/// Contains all state common to unfunded inbound/outbound channels.

9
lightning/src/ln/channelmanager.rs
View file

@ -8425,9 +8425,9 @@ This indicates a bug inside LDK. Please report this error at https://github.com/
match peer_state.channel_by_id.entry(msg.channel_id) {
hash_map::Entry::Occupied(mut chan_phase_entry) => {
let channel_phase = chan_phase_entry.get_mut();
let tx_constructor = match channel_phase {
ChannelPhase::UnfundedV2(chan) => &mut chan.interactive_tx_constructor,
ChannelPhase::Funded(_) => {
let tx_constructor = match channel_phase.as_unfunded_v2_mut() {
Some(chan) => &mut chan.interactive_tx_constructor,
None => if channel_phase.is_funded() {
// TODO(splicing)/TODO(RBF): We'll also be doing interactive tx construction
// for a "ChannelPhase::Funded" when we want to bump the fee on an interactively
// constructed funding tx or during splicing. For now we send an error as we would
@ -8437,8 +8437,7 @@ This indicates a bug inside LDK. Please report this error at https://github.com/
splicing and RBF attempts of interactive funding transactions are not supported yet so \
we don't have any negotiation in progress".into(),
)), chan_phase_entry)
}
ChannelPhase::UnfundedInboundV1(_) | ChannelPhase::UnfundedOutboundV1(_) => {
} else {
try_chan_phase_entry!(self, peer_state, Err(ChannelError::Warn(
"Got an unexpected tx_abort message: This is an unfunded channel created with V1 channel \
establishment".into(),