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sweep: only remove the other input from the exclusive group

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We now make sure when removing inputs identified by the exclusive group
ID, we only remove the other one, not the one that invoked the removal.
This commit is contained in:
yyforyongyu
2025-07-31 07:58:24 +08:00
committed by Oliver Gugger
parent 28af39cd03
commit 3796c99bd0
1 changed files with 35 additions and 24 deletions
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59
sweep/sweeper.go
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@@ -740,15 +740,23 @@ func (s *UtxoSweeper) collector() {
}
}
// removeExclusiveGroup removes all inputs in the given exclusive group. This
// function is called when one of the exclusive group inputs has been spent. The
// other inputs won't ever be spendable and can be removed. This also prevents
// them from being part of future sweep transactions that would fail. In
// addition sweep transactions of those inputs will be removed from the wallet.
func (s *UtxoSweeper) removeExclusiveGroup(group uint64) {
// removeExclusiveGroup removes all inputs in the given exclusive group except
// the input specified by the outpoint. This function is called when one of the
// exclusive group inputs has been spent or updated. The other inputs won't ever
// be spendable and can be removed. This also prevents them from being part of
// future sweep transactions that would fail. In addition sweep transactions of
// those inputs will be removed from the wallet.
func (s *UtxoSweeper) removeExclusiveGroup(group uint64, op wire.OutPoint) {
for outpoint, input := range s.inputs {
outpoint := outpoint
// Skip the input that caused the exclusive group to be removed.
if outpoint == op {
log.Debugf("Skipped removing exclusive input %v", input)
continue
}
// Skip inputs that aren't exclusive.
if input.params.ExclusiveGroup == nil {
continue
@@ -767,6 +775,8 @@ func (s *UtxoSweeper) removeExclusiveGroup(group uint64) {
continue
}
log.Debugf("Removing exclusive group for input %v", input)
// Signal result channels.
s.signalResult(input, Result{
Err: ErrExclusiveGroupSpend,
@@ -1367,22 +1377,19 @@ func (s *UtxoSweeper) decideRBFInfo(
func (s *UtxoSweeper) handleExistingInput(input *sweepInputMessage,
oldInput *SweeperInput) {
// Before updating the input details, check if an exclusive group was
// set. In case the same input is registered again without an exclusive
// group set, the previous input and its sweep parameters are outdated
// hence need to be replaced. This scenario currently only happens for
// anchor outputs. When a channel is force closed, in the worst case 3
// different sweeps with the same exclusive group are registered with
// the sweeper to bump the closing transaction (cpfp) when its time
// critical. Receiving an input which was already registered with the
// sweeper but now without an exclusive group means non of the previous
// inputs were used as CPFP, so we need to make sure we update the
// sweep parameters but also remove all inputs with the same exclusive
// group because the are outdated too.
// Before updating the input details, check if a previous exclusive
// group was set. In case the same input is registered again, the
// previous input and its sweep parameters are outdated hence need to be
// replaced. This scenario currently only happens for anchor outputs.
// When a channel is force closed, in the worst case 3 different sweeps
// with the same exclusive group are registered with the sweeper to bump
// the closing transaction (cpfp) when its time critical. Receiving an
// input which was already registered with the sweeper means none of the
// previous inputs were used as CPFP, so we need to make sure we update
// the sweep parameters but also remove all inputs with the same
// exclusive group because they are outdated too.
var prevExclGroup *uint64
if oldInput.params.ExclusiveGroup != nil &&
input.params.ExclusiveGroup == nil {
if oldInput.params.ExclusiveGroup != nil {
prevExclGroup = new(uint64)
*prevExclGroup = *oldInput.params.ExclusiveGroup
}
@@ -1401,7 +1408,7 @@ func (s *UtxoSweeper) handleExistingInput(input *sweepInputMessage,
oldInput.listeners = append(oldInput.listeners, input.resultChan)
if prevExclGroup != nil {
s.removeExclusiveGroup(*prevExclGroup)
s.removeExclusiveGroup(*prevExclGroup, input.input.OutPoint())
}
}
@@ -1493,7 +1500,9 @@ func (s *UtxoSweeper) markInputsSwept(tx *wire.MsgTx, isOurTx bool) {
// Remove all other inputs in this exclusive group.
if input.params.ExclusiveGroup != nil {
s.removeExclusiveGroup(*input.params.ExclusiveGroup)
s.removeExclusiveGroup(
*input.params.ExclusiveGroup, outpoint,
)
}
}
}
@@ -1908,7 +1917,9 @@ func (s *UtxoSweeper) markInputSwept(inp *SweeperInput, tx *wire.MsgTx) {
// Remove all other inputs in this exclusive group.
if inp.params.ExclusiveGroup != nil {
s.removeExclusiveGroup(*inp.params.ExclusiveGroup)
s.removeExclusiveGroup(
*inp.params.ExclusiveGroup, inp.OutPoint(),
)
}
}