Firebase Authentication with GraphQL and React Client [JavaScript]

https://blog.morizyun.com/javascript/typescript-tutorial-firebase-auth-graphql-react.html

import ApolloClient, { InMemoryCache } from "apollo-boost";

const token = await auth.currentUser.getIdToken(true);

const client = new ApolloClient({
  cache: new InMemoryCache(),
  headers: { token: token },
  uri: "http://localhost:3000/graphql"
});

Before verifying the token, you need to initialize App.

// Firebase
firebaseAdmin.initializeApp({
  credential: firebaseAdmin.credential.cert({
    projectId: FIREBASE_PROJECT_ID,
    clientEmail: FIREBASE_CLIENT_EMAIL,
    privateKey: FIREBASE_PRIVATE_KEY
  }),
  databaseURL: FIREBASE_DATABASE_URL
});



After then, please set the token of headers to GraphQL context.

graphqlExpress((req, res) => {
  const context = createExpressContext(
    {
      firebaseToken: req.headers.token
    },
    res
  );

  return {
    schema,
    context
  };
})



Now, your GraphQL server can confirm the token in resolvers.

const validateAuthorization = async (token: string) => {
  await firebaseAdmin.auth().verifyIdToken(token);
};