talk/client/coral-framework/services/subscriptions.js

import {print} from 'graphql-tag/printer';

// quick way to add the subscribe and unsubscribe functions to the network interface
const addGraphQLSubscriptions = (networkInterface, wsClient) => {
  return Object.assign(networkInterface, {
    subscribe: (request, handler) => wsClient.subscribe({
      query: print(request.query),
      variables: request.variables,
    }, handler),
    unsubscribe: (id) => {
      wsClient.unsubscribe(id);
    },
  });
};

export default addGraphQLSubscriptions;