Can't deploy functions using google cloud functions-emulator - firebase

Question

I have defined the following function in my index.ts file:
export const stripeCharge = functions.region('europe-west1').database
.ref('/payments/{userId}/{paymentId}')
.onWrite(async (change, context) => {
...
});
I want to debug this function, so I am trying to use the Google Cloud Functions Emulator (npm install -g #google-cloud/functions-emulator).
First i run:
functions start
to start the emulator.
Then I want to deploy the function:
functions deploy --trigger-http --timeout 600s stripeCharge
This results in the following errors:
ERROR: Function load error: Code could not be loaded.
ERROR: Does the file exists? Is there a syntax error in your code?
ERROR: Detailed stack trace: Warning, FIREBASE_CONFIG and GCLOUD_PROJECT environment variables are missing. Initializing firebase-admin will fail
C:\Users\Jesper\intergun\functions\lib\index.js:14
const stripe = new Stripe(functions.config().stripe.testkey);
^
TypeError: Cannot read property 'testkey' of undefined
at Object.<anonymous> (C:\Users\Jesper\intergun\functions\lib\index.js:14:52)
at Module._compile (module.js:653:30)
at Object.Module._extensions..js (module.js:664:10)
at Module.load (module.js:566:32)
at tryModuleLoad (module.js:506:12)
at Function.Module._load (module.js:498:3)
at Module.require (module.js:597:17)
at require (internal/module.js:11:18)
at [eval]:1:40
at ContextifyScript.Script.runInThisContext (vm.js:50:33)
ERROR: Error: Failed to deploy function.
at exec (C:\Users\Jesper\AppData\Roaming\nvm\v8.16.0\node_modules\#google-cloud\functions-emulator\src\cli\controller.js:126:22)
at ChildProcess.exithandler (child_process.js:288:5)
at emitTwo (events.js:126:13)
at ChildProcess.emit (events.js:214:7)
at maybeClose (internal/child_process.js:915:16)
at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)
So i think the problem is that it cannot find FIREBASE_CONFIG and GCLOUD_PROJECT, which I don't understand since they should be automatically populated according to this: https://firebase.google.com/docs/functions/config-env
This is at the top of my index.ts file:
import * as functions from 'firebase-functions';
import * as admin from 'firebase-admin';
import 'firebase-functions';
import * as Stripe from 'stripe';
admin.initializeApp();
const stripe = new Stripe(functions.config().stripe.testkey);
I also have a .runtimeconfig.json file which contains the following:
{
"stripe": {
"testkey": "..."
}
}
Finally, here is my package.json:
{
"name": "functions",
"scripts": {
"lint": "tslint --project tsconfig.json",
"build": "tsc",
"serve": "npm run build && firebase serve --only functions",
"shell": "npm run build && firebase functions:shell",
"start": "npm run shell",
"deploy": "firebase deploy --only functions",
"logs": "firebase functions:log"
},
"engines": {
"node": "8"
},
"main": "lib/index.js",
"dependencies": {
"#google-cloud/storage": "^2.5.0",
"firebase-admin": "^8.1.0",
"firebase-functions": "^3.0.1",
"stripe": "^7.1.0"
},
"devDependencies": {
"#types/sharp": "^0.22.2",
"#types/stripe": "^6.30.0",
"firebase-functions-test": "^0.1.6",
"tslint": "^5.12.0",
"typescript": "^3.2.2"
},
"private": true
}
How can I fix this?

Answer 1

You use the emulators provided by the Firebase CLI in order to test functions written using the Firebase SDKs. The Cloud emulator (#google-cloud/functions-emulator) will not work.
Unfortunately, you're writing a Realtime Database function, which is currently not supported by the emulator.