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record+htlcswitch: convert BlindedRouteData fields to optional

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For the final hop in a blinded route, the SCID and RelayInfo fields will
_not_ be set. So these fields need to be converted to optional records.

The existing BlindedRouteData constructor is also renamed to
`NewNonFinalBlindedRouteData` in preparation for a
`NewFinalBlindedRouteData` constructor which will be used to construct
the blinded data for the final hop which will contain a much smaller set
of data. The SCID and RelayInfo parameters of the constructor are left
as non-pointers in order to force the caller to set them in the case
that the constructor is called for non-final nodes. The other option
would be to create a single constructor where all parameters are
optional but I think this makes it easier for the caller to make a
mistake.
This commit is contained in:
Elle Mouton
2024-05-02 14:22:34 +02:00
parent 925b68c1ed
commit ad0905f10e
6 changed files with 71 additions and 28 deletions
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4
itest/lnd_route_blinding_test.go
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@@ -676,7 +676,7 @@ func (b *blindedForwardTest) createBlindedRoute(hops []*forwardingEdge,
// Encode the route's blinded data and include it in the
// blinded hop.
payload := record.NewBlindedRouteData(
payload := record.NewNonFinalBlindedRouteData(
scid, nil, *relayInfo, constraints, nil,
)
payloadBytes, err := record.EncodeBlindedRouteData(payload)
@@ -739,7 +739,7 @@ func (b *blindedForwardTest) createBlindedRoute(hops []*forwardingEdge,
// node ID here so that it _looks like_ a valid
// forwarding hop (though in reality it's the last
// hop).
record.NewBlindedRouteData(
record.NewNonFinalBlindedRouteData(
lnwire.NewShortChanIDFromInt(100), nil,
record.PaymentRelayInfo{}, nil, nil,
),