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htlcswitch: sync link hand-off

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This commit extends the link with a new synchronous delivery point for
local UpdateAddHTLC messages. The switch method SendHTLC is updated to
use this delivery point and thereby becomes a synchronous call.

For MPP payments, synchronous hand-off is important. Otherwise the next
pathfinding round could start without the channel balance updated yet.
This commit is contained in:
Joost Jager
2020-04-13 17:29:52 +02:00
parent de2df5606a
commit c325bf8c57
6 changed files with 120 additions and 18 deletions
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2
htlcswitch/switch.go
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@ -491,7 +491,7 @@ func (s *Switch) SendHTLC(firstHop lnwire.ShortChannelID, paymentID uint64,
return linkErr
}
return link.HandleSwitchPacket(packet)
return link.HandleLocalAddPacket(packet)
}
// UpdateForwardingPolicies sends a message to the switch to update the