The current integration that client applications use to interact with the OpenPoll blockchain running on the Hyperledger Fabric runtime use an automatically generated RESTful server that plugs into the blockchain along with the appropriate client-side integration to apply CRUD operations to the blockchain through this RESTful server.
This will suffice for the meantime, but ultimately client applications should leverage the native Node.js client library that is provided in the Hyperledger Composer suite of development tools.
Complete these initial integrations as well as listening to events emitted by the blockchain.