htlcswitch: add blinding point to decode hop iterator request

htlcswitch/hop/iterator.go

@@ -178,6 +178,7 @@ type DecodeHopIteratorRequest struct {
 	OnionReader   io.Reader
 	RHash         []byte
 	IncomingCltv  uint32
+	BlindingPoint *btcec.PublicKey
 }
 
 // DecodeHopIteratorResponse encapsulates the outcome of a batched sphinx onion
@@ -233,8 +234,15 @@ func (p *OnionProcessor) DecodeHopIterators(id []byte,
 			return lnwire.CodeInvalidOnionKey
 		}
 
+		var opts []sphinx.ProcessOnionOpt
+		if req.BlindingPoint != nil {
+			opts = append(opts, sphinx.WithBlindingPoint(
+				req.BlindingPoint,
+			))
+		}
+
 		err = tx.ProcessOnionPacket(
-			seqNum, onionPkt, req.RHash, req.IncomingCltv,
+			seqNum, onionPkt, req.RHash, req.IncomingCltv, opts...,
 		)
 		switch err {
 		case nil:

htlcswitch/link.go

@@ -3163,6 +3163,7 @@ func (l *channelLink) processRemoteAdds(fwdPkg *channeldb.FwdPkg,
 				OnionReader:   onionReader,
 				RHash:         pd.RHash[:],
 				IncomingCltv:  pd.Timeout,
+				BlindingPoint: pd.BlindingPoint,
 			}
 
 			decodeReqs = append(decodeReqs, req)