I trying to implement the metrics in nodejs application using fabric-network, I'm new to fabric-sdk-node and not able to figure out how to access functionalities (eg : system chaincode methods and other method like Fabric Version) hosted by peers and orderer services and how to use them in nodejs application.
I have tried and access user-chaicode methods using fabric-network but I'm not able figure out how to get core functionalities of peers and orderer ('peer version' or total number of transaction per channel) in nodejs application