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htlcswitch: use LinkError for internal errors

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Update the ChannelLink interface to specifically
return the LinkError struct. This error implements
the ClearTextError interface, so will be picked
up as a routing realted error by the router.

With LinkErrors implemented, the switch now
returns a LinkError for all failures on our
incoming/outgoing link and ForwardingError when
the failure occurs down the line.
This commit is contained in:
carla
2020-01-14 15:07:42 +02:00
parent b5a2d75465
commit f430fd50c5
8 changed files with 185 additions and 79 deletions
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17
htlcswitch/interfaces.go
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@@ -102,20 +102,21 @@ type ChannelLink interface {
// CheckHtlcForward should return a nil error if the passed HTLC details
// satisfy the current forwarding policy fo the target link. Otherwise,
// a valid protocol failure message should be returned in order to
// signal to the source of the HTLC, the policy consistency issue.
// a LinkError with a valid protocol failure message should be returned
// in order to signal to the source of the HTLC, the policy consistency
// issue.
CheckHtlcForward(payHash [32]byte, incomingAmt lnwire.MilliSatoshi,
amtToForward lnwire.MilliSatoshi,
incomingTimeout, outgoingTimeout uint32,
heightNow uint32) lnwire.FailureMessage
heightNow uint32) *LinkError
// CheckHtlcTransit should return a nil error if the passed HTLC details
// satisfy the current channel policy. Otherwise, a valid protocol
// failure message should be returned in order to signal the violation.
// This call is intended to be used for locally initiated payments for
// which there is no corresponding incoming htlc.
// satisfy the current channel policy. Otherwise, a LinkError with a
// valid protocol failure message should be returned in order to signal
// the violation. This call is intended to be used for locally initiated
// payments for which there is no corresponding incoming htlc.
CheckHtlcTransit(payHash [32]byte, amt lnwire.MilliSatoshi,
timeout uint32, heightNow uint32) lnwire.FailureMessage
timeout uint32, heightNow uint32) *LinkError
// Bandwidth returns the amount of milli-satoshis which current link
// might pass through channel link. The value returned from this method