Thanks for the reply, @fabrice and @tsachi
I am now using indexer to search the local state with limitations on application id and round number. I am expecting the results as the local states of the opted-in accounts previous than the input round number in the specified app.
But it is showing the error of IndexHTTPError, saying that server is not supportive to this kind of request.
I will put my code and the error information here.
Any thoughts on this error?