App-check from firebase function

[Alex Whittaker]

Morning folks, before I submit a bug I just want to check that I'm not missing something - I have a cloud function that should be writing to the real time database, the database is protected with App Check which is failing to recognise the function servers as legitimate a endpoint. I am getting this error:

[2021-07-15T10:37:23.448Z] @firebase/database: FIREBASE WARNING: Missing appcheck token (https://xxxxxxxxxxxx-rtdb.europe-west1.firebasedatabase.app/)

If I turn off app-check on the database everything works as expected.

  ..alex

[Sam Stern]

Hey Alex,

Are you using "firebase-admin" to write to the database or are you using the "firebase" package (which is the Web SDK). They both actually share a common JS core but they authenticate differently, which I think could be the difference here.

- Sam

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[Alex Whittaker]

Hi Sam, firebase-admin.

[Alex Whittaker]

Function is here:

const admin = require('firebase-admin');
const handleException = require('../handleException');

module.exports = (data, context) => {

admin.database().ref(`userInvites/${context.auth.uid}/${data.inviteKey}`).set({
email: data.email,
invited: Date.now()
}).catch(handleException);
return true;
};

On Thursday, 15 July 2021 at 12:47:51 UTC+1 sams...@google.com wrote:

[Sam Stern]

Hey Alex,

Apparently this is a known issue and should be addressed by this PR:
https://github.com/firebase/firebase-js-sdk/pull/5146

So the fix should be included in the next release of firebase-js-sdk (which will be pulled in by firebase-admin). You may need to update your package.json and package-lock.json after the fix rolls out.

- Sam

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