firebase functions says "Functions did not deploy properly." - firebase

Question

I want to use Stripe with Firebase Functions.
Attempting to deploy the following source code to functions will result in an error.
const functions = require('firebase-functions');
const express = require("express");
const app = express();
// This is your real test secret API key.
const stripe = require("stripe")("STRIPE KEY HERE");
app.use(express.static("."));
app.use(express.json());
const calculateOrderAmount = items => {
// Replace this constant with a calculation of the order's amount
// Calculate the order total on the server to prevent
// people from directly manipulating the amount on the client
return 1400;
};
app.post("/create-payment-intent", async (req, res) => {
const { items } = req.body;
// Create a PaymentIntent with the order amount and currency
const paymentIntent = await stripe.paymentIntents.create({
amount: calculateOrderAmount(items),
currency: "usd"
});
res.send({
clientSecret: paymentIntent.client_secret
});
});
module.exports.express = functions.https.onRequest(app);
This is what I want to achieve.
https://stripe.com/docs/payments/integration-builder
I want to deploy to Firebase Functions using react for the front and Node for the back end.
＜/functions/package.json＞
{
"name": "functions",
"description": "Cloud Functions for Firebase",
"scripts": {
"lint": "eslint .",
"serve": "firebase emulators:start --only functions",
"shell": "firebase functions:shell",
"start": "npm run shell",
"deploy": "firebase deploy --only functions",
"logs": "firebase functions:log"
},
"engines": {
"node": "12"
},
"main": "index.js",
"dependencies": {
"firebase-admin": "^9.2.0",
"firebase-functions": "^3.11.0"
},
"devDependencies": {
"eslint": "^7.6.0",
"eslint-config-google": "^0.14.0",
"firebase-functions-test": "^0.2.0"
},
"private": true
}
When I tried the command "firebase deploy --only" functions: express ", I got the following error:
Error: function terminated. Recommended action: inspect logs for termination reason. Additional troubleshooting documentation can be found at https://cloud.google.com/functions/docs/troubleshooting#logging Function cannot be initialized
This was accompanied by this Log object:
{
"#type": "type.googleapis.com/google.cloud.audit.AuditLog",
"status": {
"code": 3,
"message": "Function failed on loading user code. This is likely due to a bug in the user code. Error message: Error: please examine your function logs to see the error cause: https://cloud.google.com/functions/docs/monitoring/logging#viewing_logs. Additional troubleshooting documentation can be found at https://cloud.google.com/functions/docs/troubleshooting#logging. Please visit https://cloud.google.com/functions/docs/troubleshooting for in-depth troubleshooting documentation."
},
"authenticationInfo": {
"principalEmail": "MYADDRESS#gmail.com"
},
"serviceName": "cloudfunctions.googleapis.com",
"methodName": "google.cloud.functions.v1.CloudFunctionsService.UpdateFunction",
"resourceName": "projects/MYPROJECT/locations/us-central1/functions/express"
}
i deploying functions
i functions: ensuring required API cloudfunctions.googleapis.com is enabled ...
i functions: ensuring required API cloudbuild.googleapis.com is enabled ...
✔ functions: required API cloudbuild.googleapis.com is enabled
✔ functions: required API cloudfunctions.googleapis.com is enabled
i functions: preparing functions directory for uploading ...
i functions: packaged functions (44.09 KB) for uploading
✔ functions: functions folder uploaded successfully
i functions: creating Node.js 12 function express (us-central1) ...
Functions deploy had errors with the following functions:
express (us-central1)
To try redeploying those functions, run:
firebase deploy --only "functions: express"
To continue deploying other features (such as database), run:
firebase deploy --except functions
Error: Functions did not deploy properly.
Does anyone know the solution?

Answer 1

You need to export the Express.js app as an HTTPS function with
exports.app = functions.https.onRequest(app);
instead of doing
module.exports.express = functions.https.onRequest(app);
See the doc.
Then you need to deploy with, for example, firebase deploy --only functions.
Note that it seems that there is an extra double quote (") in the command you entered:
I typed the command "firebase deploy --only" functions: express "