fixup! multi: Support jumbo size om packets

Author: gijswijs

sphinx.go

@@ -235,18 +235,11 @@ func NewOnionPacket(paymentPath *PaymentPath, sessionKey *btcec.PrivateKey,
 
 	totalPayloadSize := paymentPath.TotalPayloadSize()
 
-	var routingInfoLen int
+	routingInfoLen := StandardRoutingInfoSize
 	maxRoutingInfoErr := ErrStandardRoutingInfoSizeExceeded
-	if cfg.isOnionMessage {
-		switch {
-		case totalPayloadSize <= StandardRoutingInfoSize:
-			routingInfoLen = StandardRoutingInfoSize
-		default:
-			routingInfoLen = JumboRoutingInfoSize
-			maxRoutingInfoErr = ErrJumboRoutingInfoSizeExceeded
-		}
-	} else {
-		routingInfoLen = StandardRoutingInfoSize
+	if cfg.isOnionMessage && totalPayloadSize > StandardRoutingInfoSize {
+		routingInfoLen = JumboRoutingInfoSize
+		maxRoutingInfoErr = ErrJumboRoutingInfoSizeExceeded
 	}
 
 	// Check whether total payload size doesn't exceed the hard maximum.