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htlcswitch: add linkError field to htlcpacket

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This commit adds a linkError field to track the value of failures
which occur at our node. This field is set when local payments or
multi hop htlcs fail in the switch or on our outgoing link. This
addition is required for the addition of a htlc notifier which will
notify these failures in handleDownstreamPacket.

The passing of link error to failAddPacket removes the need for an
additional error field, because the link error's failure detail will
contain any additional metadata. In the places where the failure detail
does not cover all the metadata that was previously supplied by addr
err, the error is logged before calling failAddPacket so that this
change does not reduce the amount of information we log.
This commit is contained in:
carla
2020-02-06 19:35:17 +02:00
parent 9390d3bbfd
commit 74e0d545fe
6 changed files with 102 additions and 44 deletions
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5
htlcswitch/packet.go
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@@ -54,6 +54,11 @@ type htlcPacket struct {
// encrypted with any shared secret.
localFailure bool
// linkFailure is non-nil for htlcs that fail at our node. This may
// occur for our own payments which fail on the outgoing link,
// or for forwards which fail in the switch or on the outgoing link.
linkFailure *LinkError
// convertedError is set to true if this is an HTLC fail that was
// created using an UpdateFailMalformedHTLC from the remote party. If
// this is true, then when forwarding this failure packet, we'll need