How to grant Secret Manager Secret Accessor role for Stripe Webhook secret in Firebase Cloud Functions (v2) - Stack Overflow

I’m using the Stripe Node SDK within my Firebase Cloud Functions (v2) and running into a permissions issue when deploying one of my functions. Specifically, my handlestripewebhook function fails with the following error as viewed in Google Cloud Console:

Revision 'handlestripewebhook-00003-bob' is not ready and cannot serve traffic.
spec.template.spec.containers[0].env[7].value_from.secret_key_ref.name: 
Permission denied on secret: projects/XYZ-1a45e/secrets/STRIPE_WEBHOOK_SECRET/versions/1 for 
Revision service account [email protected].
The service account used must be granted the 'Secret Manager Secret Accessor' role
(roles/secretmanager.secretAccessor) at the secret, project or higher level.

Here is a screenshot of my IAM settings for reference:

I’m aware that the service account [email protected] needs the Secret Manager Secret Accessor role to access the secret. However, I’m unsure of the exact steps to grant that role to my handlestripewebhook function.

I’d appreciate any tips or steps on how to properly configure the permissions so that my function can read the Stripe webhook secret from Secret Manager. Thank you!

What I’ve Tried

• Added Stripe webhook secret to Google Secret Manager and named it STRIPE_WEBHOOK_SECRET. The function reads the secret via the const stripeWebhookSecret = defineSecret('STRIPE_WEBHOOK_SECRET') syntax.
• Checked the IAM settings in Google Cloud console, but not entirely sure if I’m assigning the role to the right service account as I do not see it listed.

Any guidance on how to properly set up this secret accessor role (or if there’s another permission I’m missing) would be greatly appreciated!