Merge branch 'main' into nodetest

maplejuice/utils.go

@@ -103,6 +103,9 @@ func establishConnection(workerIP string) net.Conn {
 }
 
 func Send(sender string, conn net.Conn, msgType MsgType, payload interface{}) error {
+	if conn == nil {
+		return fmt.Errorf("Connection is nil")
+	}
 	message := Message{
 		Sender:  sender,
 		Type:    msgType,