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router: simplify edge outdated logic, return ErrOutdated if old.

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This commit is contained in:
Johan T. Halseth 2018-08-20 14:28:09 +02:00
parent 47788c3cec
commit 18e680f192
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GPG Key ID: 15BAADA29DA20D26
2 changed files with 14 additions and 13 deletions
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2
routing/errors.go
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@ -31,7 +31,7 @@ const (
ErrTargetNotInNetwork
// ErrOutdated is returned when the routing update already have
// been applied.
// been applied, or a newer update is already known.
ErrOutdated
// ErrIgnored is returned when the update have been ignored because

25
routing/router.go
View File

@ -1080,30 +1080,31 @@ func (r *ChannelRouter) processUpdate(msg interface{}) error {
// As edges are directional edge node has a unique policy for
// the direction of the edge they control. Therefore we first
// check if we already have the most up to date information for
// that edge. If so, then we can exit early.
// that edge. If this message has a timestamp not strictly
// newer than what we already know of we can exit early.
switch {
// A flag set of 0 indicates this is an announcement for the
// "first" node in the channel.
case msg.Flags&lnwire.ChanUpdateDirection == 0:
if edge1Timestamp.After(msg.LastUpdate) ||
edge1Timestamp.Equal(msg.LastUpdate) {
return newErrf(ErrIgnored, "Ignoring update "+
"(flags=%v) for known chan_id=%v", msg.Flags,
msg.ChannelID)
// Ignore outdated message.
if !edge1Timestamp.Before(msg.LastUpdate) {
return newErrf(ErrOutdated, "Ignoring "+
"outdated update (flags=%v) for known "+
"chan_id=%v", msg.Flags, msg.ChannelID)
}
// Similarly, a flag set of 1 indicates this is an announcement
// for the "second" node in the channel.
case msg.Flags&lnwire.ChanUpdateDirection == 1:
if edge2Timestamp.After(msg.LastUpdate) ||
edge2Timestamp.Equal(msg.LastUpdate) {
return newErrf(ErrIgnored, "Ignoring update "+
"(flags=%v) for known chan_id=%v", msg.Flags,
msg.ChannelID)
// Ignore outdated message.
if !edge2Timestamp.Before(msg.LastUpdate) {
return newErrf(ErrOutdated, "Ignoring "+
"outdated update (flags=%v) for known "+
"chan_id=%v", msg.Flags, msg.ChannelID)
}
}
@ -2021,7 +2022,7 @@ func (r *ChannelRouter) applyChannelUpdate(msg *lnwire.ChannelUpdate) error {
FeeBaseMSat: lnwire.MilliSatoshi(msg.BaseFee),
FeeProportionalMillionths: lnwire.MilliSatoshi(msg.FeeRate),
})
if err != nil && !IsError(err, ErrIgnored) {
if err != nil && !IsError(err, ErrIgnored, ErrOutdated) {
return fmt.Errorf("Unable to apply channel update: %v", err)
}