firebase cloudflare

firebase-token.js

import { getTokenFromGCPServiceAccount } from '@sagi.io/workers-jwt'

/**
* Getting the access token to use in the header.
*/

// For example's sake, the file contents (modified) from the private key has been 
// listed below, but the recommended way would be to use environment variables.
export async function getAccessToken() {
  const jwtToken = await getTokenFromGCPServiceAccount({
    serviceAccountJSON: {
      type: 'service_account',
      project_id: 'notion-potions',
      private_key_id: '12345678910',
      private_key:
        '-----BEGIN PRIVATE KEY-----',
      client_email:
        '[email protected]',
      client_id: '10283',
      auth_uri: 'https://accounts.google.com/o/oauth2/auth',
      token_uri: 'https://oauth2.googleapis.com/token',
      auth_provider_x509_cert_url: 'https://www.googleapis.com/oauth2/v1/certs',
      client_x509_cert_url:
        'https://www.googleapis.com/robot/v1/metadata/x509/firebase-adminsdk-777%40your-project.iam.gserviceaccount.com',
    },
    aud: 'https://oauth2.googleapis.com/token',
    payloadAdditions: {
      scope: [
        // scope required for firestore
        'https://www.googleapis.com/auth/datastore',
        // The following scopes are required only for realtime database
        'https://www.googleapis.com/auth/userinfo.email',
        'https://www.googleapis.com/auth/firebase.database',
      ].join(' '),
    },
  })

  const accessToken = await (
    await fetch('https://oauth2.googleapis.com/token', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/x-www-form-urlencoded',
      },
      body: new URLSearchParams({
        grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer',
        assertion: jwtToken, // the JWT token generated in the previous step
      }),
    })
  ).json()

  return accessToken
}

/**
* Get all documents in a collection
*/
export async function getCollection() {
  const accessToken = await getAccessToken()

  const response = await (
    await fetch(
      'https://firestore.googleapis.com/v1/projects/<PROJECTIDHERE>/databases/(default)/documents/<COLLECTIONNAME>', 
      {
        method: 'GET',
        headers: {
          Authorization: 'Bearer ' + accessToken.access_token,
        },
      }
    )
  ).json()

  return response
}