threetwotwo

export const fanOutPostWrite = functions.firestore
    .document('users/{uid}/posts/{postId}')
    .onWrite(async (change, context) => {
        const postId = context.params.postId;
        const uploader = context.params.uid;

        const followerRefs = await firestore
            .collection('users').doc(uploader)
            .collection('followers').get();