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htlcswitch: as exit node check for invoice and HTLC value match after existence

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This commit is contained in:
Olaoluwa Osuntokun 2017-10-22 18:33:54 -07:00
parent a29210f089
commit e02af3f877
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GPG Key ID: 964EA263DD637C21
1 changed files with 18 additions and 16 deletions
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34
htlcswitch/link.go
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@ -1174,6 +1174,22 @@ func (l *channelLink) processLockedInHtlcs(
continue continue
} }
// If we're not currently in debug mode, and
// the extended htlc doesn't meet the value
// requested, then we'll fail the htlc.
// Otherwise, we settle this htlc within our
// local state update log, then send the update
// entry to the remote party.
if !l.cfg.DebugHTLC && pd.Amount < invoice.Terms.Value {
log.Errorf("rejecting htlc due to incorrect "+
"amount: expected %v, received %v",
invoice.Terms.Value, pd.Amount)
failure := lnwire.FailIncorrectPaymentAmount{}
l.sendHTLCError(pd.RHash, failure, obfuscator)
needUpdate = true
continue
}
// As we're the exit hop, we'll double check // As we're the exit hop, we'll double check
// the hop-payload included in the HTLC to // the hop-payload included in the HTLC to
// ensure that it was crafted correctly by the // ensure that it was crafted correctly by the
@ -1196,6 +1212,8 @@ func (l *channelLink) processLockedInHtlcs(
// We'll also ensure that our time-lock value // We'll also ensure that our time-lock value
// has been computed correctly. // has been computed correctly.
//
// TODO(roasbeef): also accept global default?
expectedHeight := heightNow + l.cfg.FwrdingPolicy.TimeLockDelta expectedHeight := heightNow + l.cfg.FwrdingPolicy.TimeLockDelta
if !l.cfg.DebugHTLC { if !l.cfg.DebugHTLC {
switch { switch {
@ -1227,22 +1245,6 @@ func (l *channelLink) processLockedInHtlcs(
} }
} }
// If we're not currently in debug mode, and
// the extended htlc doesn't meet the value
// requested, then we'll fail the htlc.
// Otherwise, we settle this htlc within our
// local state update log, then send the update
// entry to the remote party.
if !l.cfg.DebugHTLC && pd.Amount < invoice.Terms.Value {
log.Errorf("rejecting htlc due to incorrect "+
"amount: expected %v, received %v",
invoice.Terms.Value, pd.Amount)
failure := lnwire.FailIncorrectPaymentAmount{}
l.sendHTLCError(pd.RHash, failure, obfuscator)
needUpdate = true
continue
}
if l.cfg.DebugHTLC && l.cfg.HodlHTLC { if l.cfg.DebugHTLC && l.cfg.HodlHTLC {
log.Warnf("hodl HTLC mode enabled, " + log.Warnf("hodl HTLC mode enabled, " +
"will not attempt to settle " + "will not attempt to settle " +