Tips for providing certificate key file during the deployment of a cloud function?

Within my TypeScript file, the following code is present:

import * as admin from 'firebase-admin'
import * as functions from 'firebase-functions'
const serviceAccountKey = "serviceAccountKey.json"
const databaseURL = "https://blahblah.firebaseio.com"

admin.initializeApp({
    credential: admin.credential.cert(serviceAccountKey),
    databaseURL: databaseURL
});

While testing in the emulator, everything runs smoothly. However, when attempting to deploy, an error surfaces:

Error: An issue arose while parsing function triggers.
Error: Failed to parse certificate key file: Error: ENOENT: no such file or directory, open 'serviceAccountKey.json'

I've experimented with relocating the json file to various directories, including the root folder and the lib folder where index.js resides, but to no avail. How can I successfully pass the key during deployment?

https://i.stack.imgur.com/WunHh.png

typescriptfirebasegoogle-cloud-functions

Answer №1

When you use the Firebase CLI to deploy content to Cloud Functions, it will upload all the files in your functions folder except node_modules (which will be rebuilt using package.json). The functions folder will then become the root of your deployment. When your function runs, all these files will be available, but you'll need to reference them correctly using relative paths.

With that in mind, I see that your serviceAccount.json and compiled index.js are located in a folder named "lib". If you want index.js to access JSON from other files in the same folder, you'll need to use a relative path like this:

const serviceAccountKey = "./serviceAccountKey.json"

Make sure to include the "./" at the beginning of the path, indicating that you're referring to a file in the same folder as the current source file.

I have one suggestion: In TypeScript projects, the "lib" folder is usually reserved for compiled code. It's best to avoid placing your service account file there, as the folder might get removed during a clean build. Instead, consider putting it at the root of the deployment and referencing it as "../serviceAccount.json", which is what I typically do.

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