Function that creates an instance of Apollo Client

createClient.js

import typy from "typy";

import { ApolloClient } from "apollo-client";
import { HttpLink } from "apollo-link-http";
import { InMemoryCache } from "apollo-cache-inmemory";

import cacheRedirects from "./cacheRedirects";
import resolvers from "./resolvers";
import typeDefs from "./typeDefs";

export default function createClient(chainName = "") {
  /* By default, we display the data on mainnet */
  let uri;
  if (typy(chainName).isFalsy || chainName === "mainnet") {
    uri = process.env.REACT_APP_APOLLO_HTTP_URL;
  } else {
    uri = process.env.REACT_APP_APOLLO_HTTP_URL + "-" + chainName;
  }

  return new ApolloClient({
    cache: new InMemoryCache({
      cacheRedirects,
    }),
    link: new HttpLink({ uri }),
    resolvers,
    typeDefs,
  });
}