multi: pass blinding point through to reconstruction

contractcourt/htlc_incoming_contest_resolver.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"io"
 
+	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/btcsuite/btcd/btcutil"
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/lightningnetwork/lnd/channeldb"
@@ -17,6 +18,7 @@ import (
 	"github.com/lightningnetwork/lnd/lnwallet"
 	"github.com/lightningnetwork/lnd/lnwire"
 	"github.com/lightningnetwork/lnd/queue"
+	"github.com/lightningnetwork/lnd/tlv"
 )
 
 // htlcIncomingContestResolver is a ContractResolver that's able to resolve an
@@ -520,9 +522,18 @@ func (h *htlcIncomingContestResolver) Supplement(htlc channeldb.HTLC) {
 func (h *htlcIncomingContestResolver) decodePayload() (*hop.Payload,
 	[]byte, error) {
 
+	var blindingPoint *btcec.PublicKey
+	h.htlc.BlindingPoint.WhenSome(
+		func(b tlv.RecordT[lnwire.BlindingPointTlvType,
+			*btcec.PublicKey]) {
+
+			blindingPoint = b.Val
+		},
+	)
+
 	onionReader := bytes.NewReader(h.htlc.OnionBlob[:])
 	iterator, err := h.OnionProcessor.ReconstructHopIterator(
-		onionReader, h.htlc.RHash[:],
+		onionReader, h.htlc.RHash[:], blindingPoint,
 	)
 	if err != nil {
 		return nil, nil, err