无法从 function 源生成清单：TypeError：无法读取未定义的属性（读取“秘密”）反应 js 节点 js

Question

I try to replace:

const stripe =const stripe=require("stripe")('sk_test_51KMbN...');

to

const stripe = require("stripe")(functions.config().stripe.secret);

but when I run firebase emulators, I Run into an error:

Error: Failed to load function definition from source: Failed to generate manifest from function source: TypeError: Cannot read properties of undefined (reading 'secret')

I already set it as below:

firebase functions:config:set stripe.secret=< SECRET KEY>

and I can see it by runing:

firebase functions:config:get

My code in functions/index.js is

const functions = require("firebase-functions");
const express=require("express");
const cors=require("cors");
require('dotenv').config({ path: './.env' });
//API
const stripe = require("stripe")(functions.config().stripe.secret);

//App config
const app=express();
var admin = require("firebase-admin");
var serviceAccount = require("./serviceAccountKey.json");
admin.initializeApp({
  credential: admin.credential.cert(serviceAccount)
});
//middlewares
app.use(cors({origin: true}));
app.use(express.json());
async function createCheckoutSession(req, res) {
  
  const domainUrl = process.env.WEB_APP_URL;
  const { line_items, customer_email } = req.body;
  if (!line_items || !customer_email) {
    return res.status(400).json({ error: 'missing required session parameters' });
  }
  let session; 
  try {
    session = await stripe.checkout.sessions.create({
      payment_method_types: ['card'],
      mode: 'payment',
      line_items,
      customer_email,
      success_url: `${domainUrl}/success?session_id={CHECKOUT_SESSION_ID}`,
      cancel_url: `${domainUrl}/canceled`,
      shipping_address_collection: { allowed_countries: ['GB', 'US'] }
    }); 
    res.status(200).json({ sessionId: session.id, });
  } catch (error) {
    console.log(error);
    res.status(400).json({ error: 'an error occured, unable to create session'});
  }}
app.get('/',(req, res)=>res.send('Hello World!'));
app.post('/create-checkout-session', createCheckoutSession);
exports.api=functions.https.onRequest(app);

the code has no problem when I define:

 const stripe =const stripe=require("stripe")('sk_test_51KMbNcJ....');

I do not know why it cannot read properties of undefined "functions.config().stripe.secret"

Answer 1

If, like me, you got this error while trying to run your functions locally then it's because functions.config() is only available within the Cloud Functions runtime.

If you are trying to test your functions before you deploy, here is the link to the documentation on how to do so: run functions locally. Specifically, this part is of interest:

If you're using custom functions configuration variables, run the following command in the functions directory of your project before running firebase serve.

firebase functions:config:get > .runtimeconfig.json

However, if you're using Windows PowerShell, replace the above command with:

firebase functions:config:get | ac .runtimeconfig.json