Firebase-functions: Certificate object must contain a string "private_key" property.

[pratiknikam]

Version info

firebase-functions: 0.8.1

firebase-tools: 3.17.3

firebase-admin: 5.8.1

Test case

I've basic function which looks as follows

exports.returnSomething = functions.https.onRequest((req, res) => {
        // doStuff does some stuff and returns a response.
        return doStuff(req,res);
});

Steps to reproduce

cd functions
npm i
functions start
firebase serve --only functions

Were you able to successfully deploy your functions?

Yes, deployment is working fine.

We have runtime config which I'm exporting to my local functions folder using firebase functions:config:get > .runtimeconfig.json. It has all "private_key" value (string) in it.

Expected behavior

It should start serving function locally.

Actual behavior

It does serve function locally but gives following error on firebase serve --only functions

straws-v:functions veggie.straws$ firebase serve --only functions

=== Serving from '/Users/veggie.straws/Sample/right-shift'...

i  functions: Preparing to emulate functions.
Warning: You're using Node.js v9.4.0 but Google Cloud Functions only supports v6.11.1.
⚠  functions: Failed to load functions source code. Ensure that you have the latest SDK by running npm i --save firebase-functions inside the functions directory.
⚠  functions: Error from emulator. FirebaseError: Error occurred while parsing your function triggers.

Error: Certificate object must contain a string "private_key" property.
    at FirebaseAppError.FirebaseError [as constructor] (/Users/veggie.straws/Sample/right-shift/functions/node_modules/firebase-admin/lib/utils/error.js:39:28)
    at FirebaseAppError.PrefixedFirebaseError [as constructor] (/Users/veggie.straws/Sample/right-shift/functions/node_modules/firebase-admin/lib/utils/error.js:85:28)
    at new FirebaseAppError (/Users/veggie.straws/Sample/right-shift/functions/node_modules/firebase-admin/lib/utils/error.js:119:28)
    at new Certificate (/Users/veggie.straws/Sample/right-shift/functions/node_modules/firebase-admin/lib/credential.js:125:19)
    at new CertCredential (/Users/veggie.straws/Sample/right-shift/functions/node_modules/firebase-admin/lib/credential.js:194:33)
    at Object.cert (/Users/veggie.straws/Sample/right-shift/functions/node_modules/firebase-admin/lib/firebase-namespace.js:237:58)
    at Object.<anonymous> (/Users/veggie.straws/Sample/right-shift/functions/index.js:11:40)
    at Module._compile (module.js:660:30)
    at Object.Module._extensions..js (module.js:671:10)
    at Module.load (module.js:573:32)
    at tryModuleLoad (module.js:513:12)
    at Function.Module._load (module.js:505:3)
    at Module.require (module.js:604:17)
    at require (internal/module.js:11:18)
    at /usr/local/lib/node_modules/firebase-tools/lib/triggerParser.js:18:11
    at Object.<anonymous> (/usr/local/lib/node_modules/firebase-tools/lib/triggerParser.js:38:3)
    at Module._compile (module.js:660:30)
    at Object.Module._extensions..js (module.js:671:10)
    at Module.load (module.js:573:32)
    at tryModuleLoad (module.js:513:12)
    at Function.Module._load (module.js:505:3)
    at Function.Module.runMain (module.js:701:10)

• .runtimeconfig.json has same values as what firebase functions:config:get returns.

• Tried installing latest version of firebase functions but no luck npm i --save firebase-functions

[laurenzlong]

@pratiknikam Can you clarify what you mean by "It has all "private_key" value (string) in it."? So do you have a config variable with the key "private_key"?

How are you initializing firebase-admin? Are you doing admin.initializeApp(functions.config().firebase) or something else?

[pratiknikam]

@laurenzlong Yes, I have a .runtimeconfig.json which has variable with the key "private_key".

const config = functions.config();
const fbConfig = functions.config().firebase;

fbConfig.credential = admin.credential.cert({
    'private_key': replace(get(config, 'service_account.private_key'), /\\n/g, '\n')),
    'client_email': get(config, 'service_account.email'),
    'project_id': get(config, 'service_account.project_id')
});

admin.initializeApp(fbConfig);

.runtimeconfig.json looks as follows

{
    "service_account": {
        "private_key": "<private-key",
        "email": "<email>",
        "project_id": "<project-id>"
    },
    "firebase": {
        "apiKey": "<api-key>",
        "authDomain": "<auth-domain>",
        "databaseURL": "<databas-url>",
        "projectId": "<project-id>",
        "storageBucket": "<storage-bucket>",
        "messagingSenderId": "<sender-id>"
    }
}

[laurenzlong]

I see, this is a CLI bug which was fixed in master branch, and will be released in a few days. You can use it right away by running:

npm install -g https://github.com/firebase/firebase-tools.git

[laurenzlong]

It was actually just released, so you can update to v3.17.4 of firebase-tools by running:

npm install -g firebase-tools