Problem Intro

I have over a hundred Firebase Cloud Functions, and to keep the code organised, I split them into separate files per function (e.g., userFunctions, adminFunctions, authFunctions, ...) as per the instructions in the official Firebase thread.

In my index.ts I import all the different function files as:

import * as adminFunctions from './modules/adminFunctions';
import * as userFunctions from './modules/userFunctions';
...

exports.adminFunctions = adminFunctions;
exports.userFunctions = userFunctions;
...

In my userFunctions.ts file, I would declare the individual functions, some of which would call additional reusable functions from authFunctions.ts

userFunctions.ts

import { https } from 'firebase-functions';
import { performAppCheckAuthentication } from './supportingFunctions/authFunctions';

exports.deleteExpiredOrganisationMembershipInvite = https.onCall(async (data, context) => {
    // Perform AppCheck authentication
    performAppCheckAuthentication(data, context)

    // More code
    ...
})

The cross-referenced authFunctions.ts would look like this:

exports.performAppCheckAuthentication = function (
    data: { [key: string]: any },
    context: CallableContext
) {
    
    return true; // There would be actual logic here in the real code
}

Exact Issue

When I have TypeScript try to compile this code, it gives me the following error in the userFunctions.ts file in the import statement:

Module '"./supportingFunctions/authFunctions"' has no exported member 'performAppCheckAuthentication'.

How can I keep my code split into different files to retain maintainability, but also get around this issue of not being able to import the functions?

CodePudding user response：

You probably want to use the export statement instead of the exports global:

export function performAppCheckAuthentication(
    data: { [key: string]: any },
    context: CallableContext
) {
    
    return true; // There would be actual logic here in the real code
}

export const deleteExpiredOrganisationMembershipInvite = https.onCall(async (data, context) => {
    // Perform AppCheck authentication
    performAppCheckAuthentication(data, context)

    // More code
    ...
})

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