Does Firebase Admin SDK support Firestore Emulator?

[caiorcferreira]

I'm trying to set up a local environment running with the Firestore Emulator and Node.js but when I ran my script it wrote the data to the hosted Firestore instead of the local one.

I'm using the "Initialize in your own server" setup described here and setting export FIRESTORE_EMULATOR_HOST=[::1]:8080,127.0.0.1:8080 on my terminal.

Am I doing something wrong or this simply doesn't have support?

Thanks

[samtstern]

@caiorcferreira sorry for the slow response here. If you use the google-cloud Firestore lib directly you can talk to the emulator:

import { Firestore } from '@google-cloud/firestore';
import { credentials } from 'grpc';

const firestore = new Firestore({
  port: 8080,
  projectId: 'YOUR_PROJECT_ID',
  servicePath: 'localhost',
  sslCreds: credentials.createInsecure(),
});

Hope that helps! I am going to close this here and file a new issue on the Admin SDK about detecting the environment variable.

[shkreza]

@samtstern , this was helpful but one more question - how do you add auth (auth.uid, specifically) to the firestore object. Without it all my firestore security rules that refer to request.auth.uid break!

[ryanpbrewster]

As of the most recent release (https://github.com/googleapis/nodejs-firestore/releases/tag/v2.1.0) you set custom headers like so:

const firestore = new Firestore({
  projectId: 'firestore-emulator-sample',
  servicePath: 'localhost',
  port: 8080,
  sslCreds: grpc.credentials.createInsecure(),
  customHeaders: {
    "Authorization": "Bearer owner"
  }
});

The Firestore emulator accepts this "Bearer owner" authorization header and will treat the SDK connection as an admin.

[shkreza]

@ryanpbrewster, this is exactly what I was looking for and it was very timely.. thanks!

[explunit]

Note for anyone else who tries to use the sample code in this issue:

You have to use grpc-js instead of grpc https://stackoverflow.com/questions/60358056/error-passing-empty-credentials-to-firestore-emulator