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htlcswitch: ensure links are eligible to forward when selecting outgoing links

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In this commit, when selecting a candidate link to forward a payment,
we’ll ensure that it’s actually able to take on the HTLC. Otherwise,
we’ll skip over the link itself. Currently, a link is only fully
eligible for forwarding, *after* we’ve received and fully processed the
FundingLocked message.
This commit is contained in:
Olaoluwa Osuntokun
2017-12-05 17:49:55 -08:00
parent 36956d390f
commit be1a96b78a
1 changed files with 6 additions and 2 deletions
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8
htlcswitch/switch.go
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@@ -366,7 +366,9 @@ func (s *Switch) handleLocalDispatch(payment *pendingPayment, packet *htlcPacket
) )
for _, link := range links { for _, link := range links {
bandwidth := link.Bandwidth() bandwidth := link.Bandwidth()
if bandwidth > largestBandwidth { if link.EligibleToForward() &&
bandwidth > largestBandwidth {
largestBandwidth = bandwidth largestBandwidth = bandwidth
} }
@@ -488,7 +490,9 @@ func (s *Switch) handlePacketForward(packet *htlcPacket) error {
// bandwidth. // bandwidth.
var destination ChannelLink var destination ChannelLink
for _, link := range interfaceLinks { for _, link := range interfaceLinks {
if link.Bandwidth() >= htlc.Amount { if link.EligibleToForward() &&
link.Bandwidth() >= htlc.Amount {
destination = link destination = link
break break
} }