Cannot find namespace 'FirebaseFirestore' - Node.js, Express, Typescript

Question

I'm using the Firebase Admin SDK in my Express + Typescript server. I'm trying to use Firestore's method withConverter() However, I get the error "Cannot find namespace 'FirebaseFirestore'.ts(2503)". How can I deal with this?

 admin.initializeApp({ credential: admin.credential.cert(serviceAccount) }); const firestore = admin.firestore(); interface BlogpostColletion { text: String, title: String, } interface UsersCollection { blogposts: BlogpostColletion } const converter = { toFirestore: (data: UsersCollection) => data, // PROBLEM HERE "Cannot find namespace 'FirebaseFirestore'.ts(2503)" fromFirestore: (snap: FirebaseFirestore.QueryDocumentSnapshot) => snap.data() as UsersCollection }

Answer 1

You can import QueryDocumentSnapshot from Admin SDK like this:

import * as admin from "firebase-admin"

fromFirestore: (snap: admin.firestore.QueryDocumentSnapshot)