highperfocused/lnd
1
0
Fork 0
mirror of https://github.com/lightningnetwork/lnd.git synced 2025-04-03 17:40:38 +02:00
Code Issues Packages Projects Releases Wiki Activity

contractcourt: Always register anchors with sweeper.

Browse Source 
Even if no HTLCs are at stake we are going to register the anchor
outputs with the sweeper subsystem with a default high deadline.
We need to do this, because otherwise we are not able to bump the
fee of the closing transaction manually.
This commit is contained in:
ziggie 2024-07-30 15:13:02 +02:00
parent 7f9fbbe7c4
commit e413759669
No known key found for this signature in database
GPG Key ID: 1AFF9C4DCED6D666
1 changed files with 16 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
contractcourt/channel_arbitrator.go
View File

@ -40,6 +40,12 @@ const (
// arbitratorBlockBufferSize is the size of the buffer we give to each
// channel arbitrator.
arbitratorBlockBufferSize = 20
// AnchorOutputValue is the output value for the anchor output of an
// anchor channel.
// See BOLT 03 for more details:
// https://github.com/lightning/bolts/blob/master/03-transactions.md
AnchorOutputValue = btcutil.Amount(330)
)
// WitnessSubscription represents an intent to be notified once new witnesses
@ -1313,13 +1319,14 @@ func (c *ChannelArbitrator) sweepAnchors(anchors *lnwallet.AnchorResolutions,
}
// If we cannot find a deadline, it means there's no HTLCs at
// stake, which means we can relax our anchor sweeping as we
// don't have any time sensitive outputs to sweep.
// stake, which means we can relax our anchor sweeping
// conditions as we don't have any time sensitive outputs to
// sweep. However we need to register the anchor output with the
// sweeper so we are later able to bump the close fee.
if deadline.IsNone() {
log.Infof("ChannelArbitrator(%v): no HTLCs at stake, "+
"skipped anchor CPFP", c.cfg.ChanPoint)
return nil
"sweeping anchor with default deadline",
c.cfg.ChanPoint)
}
witnessType := input.CommitmentAnchor
@ -1357,10 +1364,13 @@ func (c *ChannelArbitrator) sweepAnchors(anchors *lnwallet.AnchorResolutions,
// Calculate the budget based on the value under protection,
// which is the sum of all HTLCs on this commitment subtracted
// by their budgets.
// The anchor output in itself has a small output value of 330
// sats so we also include it in the budget to pay for the
// cpfp transaction.
budget := calculateBudget(
value, c.cfg.Budget.AnchorCPFPRatio,
c.cfg.Budget.AnchorCPFP,
)
) + AnchorOutputValue
log.Infof("ChannelArbitrator(%v): offering anchor from %s "+
"commitment %v to sweeper with deadline=%v, budget=%v",