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#2964 Followups #3003

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Merged
merged 2 commits into from
Apr 25, 2024
Merged

#2964 Followups #3003

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71fef35
Correct `ChannelMonitor::is_fully_resolved` docs
TheBlueMatt Apr 18, 2024
fd0c3e4
Log when a ChannelMonitor's claimable balances set goes empty
TheBlueMatt Apr 18, 2024
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7 changes: 5 additions & 2 deletions lightning/src/chain/channelmonitor.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1865,7 +1865,7 @@ impl<Signer: WriteableEcdsaChannelSigner> ChannelMonitor<Signer> {
/// its outputs and balances (i.e. [`Self::get_claimable_balances`] returns an empty set).
///
/// This function returns true only if [`Self::get_claimable_balances`] has been empty for at least
/// 2016 blocks as an additional protection against any bugs resulting in spuriously empty balance sets.
/// 4032 blocks as an additional protection against any bugs resulting in spuriously empty balance sets.
pub fn is_fully_resolved<L: Logger>(&self, logger: &L) -> bool {
let mut is_all_funds_claimed = self.get_claimable_balances().is_empty();
let current_height = self.current_best_block().height;
Expand All @@ -1878,10 +1878,10 @@ impl<Signer: WriteableEcdsaChannelSigner> ChannelMonitor<Signer> {
}
}

const BLOCKS_THRESHOLD: u32 = 4032; // ~four weeks
match (inner.balances_empty_height, is_all_funds_claimed) {
(Some(balances_empty_height), true) => {
// Claimed all funds, check if reached the blocks threshold.
const BLOCKS_THRESHOLD: u32 = 4032; // ~four weeks
return current_height >= balances_empty_height + BLOCKS_THRESHOLD;
},
(Some(_), false) => {
Expand All @@ -1897,6 +1897,9 @@ impl<Signer: WriteableEcdsaChannelSigner> ChannelMonitor<Signer> {
(None, true) => {
// Claimed all funds but `balances_empty_height` is None. It is set to the
// current block height.
log_debug!(logger,
"ChannelMonitor funded at {} is now fully resolved. It will become archivable in {} blocks",
inner.get_funding_txo().0, BLOCKS_THRESHOLD);
inner.balances_empty_height = Some(current_height);
false
},
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