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htlcswitch/circuit_map: trim using NextLocalHtlcIndex

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This commit is contained in:
Conner Fromknecht 2018-04-23 13:21:02 -07:00
parent cae1d468e7
commit ed4f77871a
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GPG Key ID: 39DE78FBE6ACB0EF
1 changed files with 27 additions and 4 deletions
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31
htlcswitch/circuit_map.go
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@ -343,8 +343,9 @@ func (cm *circuitMap) decodeCircuit(v []byte) (*PaymentCircuit, error) {
}
// trimAllOpenCircuits reads the set of active channels from disk and trims
// keystones for any non-pending channels. This method is intended to be called
// on startup. Each link will also trim it's own circuits upon startup.
// keystones for any non-pending channels using the next unallocated htlc index.
// This method is intended to be called on startup. Each link will also trim
// it's own circuits upon startup.
//
// NOTE: This operation will be applied to the persistent state of all active
// channels. Therefore, it must be called before any links are created to avoid
@ -356,9 +357,31 @@ func (cm *circuitMap) trimAllOpenCircuits() error {
}
for _, activeChannel := range activeChannels {
if activeChannel.IsPending {
continue
}
// First, skip any channels that have not been assigned their
// final channel identifier, otherwise we would try to trim
// htlcs belonging to the all-zero, sourceHop ID.
chanID := activeChannel.ShortChanID
start := activeChannel.LocalCommitment.LocalHtlcIndex
if err := cm.TrimOpenCircuits(chanID, start); err != nil {
if chanID == sourceHop {
continue
}
// Next, retrieve the next unallocated htlc index, which bounds
// the cutoff of confirmed htlc indexes.
start, err := activeChannel.NextLocalHtlcIndex()
if err != nil {
return err
}
// Finally, remove all pending circuits above at or above the
// next unallocated local htlc indexes. This has the effect of
// reverting any circuits that have either not been locked in,
// or had not been included in a pending commitment.
err = cm.TrimOpenCircuits(chanID, start)
if err != nil {
return err
}
}