ListFunctionsAndSaveToInteralStates calls the ListFunctions gRPC and saves the functions to internal states This function is used to get the list of available functions from the external function server and save them to internal states Returns: - error: an error message if the gRPC call fails.

RunFunction calls the RunFunction gRPC and returns the outputs This function is used to run an external function Parameters: - functionName: the name of the function to run - inputs: the inputs to the function Returns: - map[string]sharedtypes.FilledInputOutput: the outputs of the function - error: an error message if the gRPC call fails.

StreamFunction calls the StreamFunction gRPC and returns a channel to stream the outputs This function is used to stream the outputs of an external function Parameters: - functionName: the name of the function to run - inputs: the inputs to the function Returns: - *chan string: a channel to stream the output - error: an error message if the gRPC call fails.

Global variable to store the available functions.