Firebase Functions ReferenceError with SendGrid function - firebase

Question

I'm trying to get started with SendGrid and a Firestore database, using Firebase functions. I've gone through tutorials and set up according to the latest notation, (snap, context) instead of (event). I can't figure out what's wrong with this script:
// The Cloud Functions for Firebase SDK to create Cloud Functions and setup triggers.
const functions = require('firebase-functions');
// The Firebase Admin SDK to access the Firebase Realtime Database.
const admin = require('firebase-admin');
admin.initializeApp();
//admin.initializeApp(functions.config().firebase);
const SENDGRID_API_KEY = my-api-key-is-here;
const sendgridemail = require('#sendgrid/mail');
sendgridemail.setApiKey(SENDGRID_API_KEY);
exports.confEmail = functions.firestore
.document('clients/{clientId}/projects/{projectId}/form-data/{docId}') //any write to this node will trigger email
.onCreate((snap, context) => {
const clientId = context.params.clientId;
const projectId = context.params.projectId;
const docId = context.params.docId;
const fsdb = admin.firestore();
return fsdb.collection('clients/'+clientId+'/projects/'+projectId+'/form-data').doc(docId)
.get()
.then(doc => {
const docData = doc.data()
const msgbody = {
to: docData.EMAIL,
from: 'xxxxx#gmail.com',
subject: 'Form Submission Confirmation',
templateId: 'd-07bf6a2b89084951a30ceddcd9c8915f',
substitutionWrappers: ['{{', '}}'],
substitutions: {
formdata: "Message Body\n<br>"+docData.CONF_MSG
}
};
return confEmail.send(msgbody)
})
.then(() => console.log('confimration mail sent success') )
.catch(err => console.log(err) )
});
The error message generated in the Firebase console is mysterious, and I'm not even sure how to interpret it.
ReferenceError: confEmail is not defined
at fsdb.collection.doc.get.then.doc (/user_code/index.js:48:13)
at process._tickDomainCallback (internal/process/next_tick.js:135:7
)
My best guess just that my 'confEmail' function is not defined because there's an error in it, but I can't figure out what. Or does it mean something else?

Answer 1

It looks like most of the tutorial scripts are over-complicating things. and a simpler script like this seems to work.
const sendgrid = require('#sendgrid/mail');
sendgrid.setApiKey(SENDGRID_API_KEY);
exports.confEmail = functions.firestore
.document('clients/{clientId}/projects/{projectId}/form-data/{docId}') //any write to this node will trigger email
.onCreate((snap, context) => {
const docData = snap.data();
const msgbody = {
to: docData.EMAIL,
from: 'xxxxxxx#gmail.com',
subject: 'Form Submission Confirmation',
templateId: 'd-07bf6a2b89084951a30ceddcd9c8915f',
substitutionWrappers: ['{{', '}}'],
substitutions: {
formdata: docData.CONF_MSG
}
};
return sendgrid.send(msgbody)
});