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htlcswitch/link: send FailFinalExpiryTooSoon from exit hop

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This commit corrects our exit hop logic to return
FailFinalExpiryTooSoon if the following check is true:
   pd.Timeout-expiryGraceDelta <= heightNow

Previously we returned FailFinalIncorrectCltvExpiry, which
should only be returned if the packet was misconstructed.
This commit is contained in:
Conner Fromknecht 2018-07-27 15:46:54 -07:00
parent 982a09ac60
commit d76bacee0e
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1 changed files with 2 additions and 2 deletions
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4
htlcswitch/link.go
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@ -9,6 +9,7 @@ import (
"sync/atomic" "sync/atomic"
"time" "time"
"github.com/btcsuite/btcd/chaincfg/chainhash"
"github.com/davecgh/go-spew/spew" "github.com/davecgh/go-spew/spew"
"github.com/go-errors/errors" "github.com/go-errors/errors"
"github.com/lightningnetwork/lnd/channeldb" "github.com/lightningnetwork/lnd/channeldb"
@ -17,7 +18,6 @@ import (
"github.com/lightningnetwork/lnd/lnpeer" "github.com/lightningnetwork/lnd/lnpeer"
"github.com/lightningnetwork/lnd/lnwallet" "github.com/lightningnetwork/lnd/lnwallet"
"github.com/lightningnetwork/lnd/lnwire" "github.com/lightningnetwork/lnd/lnwire"
"github.com/btcsuite/btcd/chaincfg/chainhash"
) )
func init() { func init() {
@ -2155,7 +2155,7 @@ func (l *channelLink) processRemoteAdds(fwdPkg *channeldb.FwdPkg,
"soon: expiry=%v, best_height=%v", "soon: expiry=%v, best_height=%v",
pd.RHash[:], pd.Timeout, heightNow) pd.RHash[:], pd.Timeout, heightNow)
failure := lnwire.FailFinalIncorrectCltvExpiry{} failure := lnwire.FailFinalExpiryTooSoon{}
l.sendHTLCError( l.sendHTLCError(
pd.HtlcIndex, &failure, obfuscator, pd.SourceRef, pd.HtlcIndex, &failure, obfuscator, pd.SourceRef,
) )