How to read cert files from Cloud Functions for Firebase Folder

I am trying to read a file under certs folder as shown below:

-functions
 |
--certs
  |
---idp-public-cert.perm

Here is the code I am using to read the file:

fs.readFileSync(path.join(__dirname, 'certs/idp-public-cert.pem')).

When I run the function, I get the following errors:

Error: ENOENT: no such file or directory, open '/srv/lib/certs/idp-public-cert.pem'

I would appreciate any crew on how to do this. Thanks in advance.

What file format should be used when storing function code in a cloud storage bucket?

You need to add the google-cloud-storage package to your requirements. txt file to install it in the Cloud Functions environment.

Just read the file using the relative path certs/idp-public-cert.pem. All relative paths will be interpreted relative to your deployed functions folder. Don't try to build a full path to the file, as you shouldn't assume where your code deployment is effectively mounted in the server instance.