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routing: add vertex pruning for non-final CLTV related errors

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In this commit, we add vertex pruning for any non-final CLTV error.
Before this commit, we assumed that any source of this error was due to
the local node setting the incorrect time lock. However, it’s been
recently noticed on main net that there’re a set of nodes that seem to
not be properly scanned to the chain. Without this patch, users aren’t
able to route successfully as atm, we’ll stop all path finding attempts
if we encounter this.
This commit is contained in:
Olaoluwa Osuntokun 2018-03-22 17:34:42 -07:00
parent 2326d4afeb
commit f935bd0baf
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GPG Key ID: 964EA263DD637C21
1 changed files with 16 additions and 4 deletions
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20
routing/router.go
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@ -1670,15 +1670,20 @@ func (r *ChannelRouter) SendPayment(payment *LightningPayment) ([32]byte, *Route
return preImage, nil, sendError
// If we get a notice that the expiry was too soon for
// an intermediate node, then we'll exit early as the
// expected block height as shifted from underneath us.
// an intermediate node, then we'll prune out the node
// that sent us this error, as it doesn't now what the
// correct block height is.
case *lnwire.FailExpiryTooSoon:
update := onionErr.Update
if err := r.applyChannelUpdate(&update); err != nil {
log.Errorf("unable to apply channel "+
"update for onion error: %v", err)
}
return preImage, nil, sendError
pruneVertexFailure(
paySession, route, errSource, false,
)
continue
// If we hit an instance of onion payload corruption or
// an invalid version, then we'll exit early as this
@ -1734,6 +1739,10 @@ func (r *ChannelRouter) SendPayment(payment *LightningPayment) ([32]byte, *Route
errFailedFeeChans[chanID] = struct{}{}
continue
// If we get the failure for an intermediate node that
// disagrees with our time lock values, then we'll
// prune it out for now, and continue with path
// finding.
case *lnwire.FailIncorrectCltvExpiry:
update := onionErr.Update
if err := r.applyChannelUpdate(&update); err != nil {
@ -1741,7 +1750,10 @@ func (r *ChannelRouter) SendPayment(payment *LightningPayment) ([32]byte, *Route
"update for onion error: %v", err)
}
return preImage, nil, sendError
pruneVertexFailure(
paySession, route, errSource, false,
)
continue
// The outgoing channel that this node was meant to
// forward one is currently disabled, so we'll apply