add and move conditions in StopNode

geth/node/manager.go

@@ -136,17 +136,20 @@ func (m *NodeManager) StopNode() (<-chan struct{}, error) {
 	m.Lock()
 	defer m.Unlock()
 
-	return m.stopNode()
-}
-
-// stopNode stop Status node. Stopped node cannot be resumed.
-func (m *NodeManager) stopNode() (<-chan struct{}, error) {
 	if err := m.isNodeAvailable(); err != nil {
 		return nil, err
 	}
+	if m.nodeStopped == nil {
+		return nil, ErrNoRunningNode
+	}
 
 	<-m.nodeStarted // make sure you operate on fully started node
 
+	return m.stopNode()
+}
+
+// stopNode stop Status node. Stopped node cannot be resumed.
+func (m *NodeManager) stopNode() (<-chan struct{}, error) {
 	// now attempt to stop
 	if err := m.node.Stop(); err != nil {
 		return nil, err