shadowfacts.net/lib/activitypub/followers.ts

import express, { Router } from "express";
import { Database } from "sqlite3";

const domain = process.env.DOMAIN;

export default function followers(): Router {
	const router = Router();

	router.get("/ap/actor/followers", (req, res) => {
		const db = <Database>req.app.get("db");

		db.all("SELECT id FROM followers", (err, rows) => {
			res.json({
				"@context": [
					"https://www.w3.org/ns/activitystreams"
				],
				"type": "OrderedCollection",
				"id": `https://${domain}/ap/actor/followers`,
				"totalItems": rows.length,
				"items": rows.map(row => row.id)
			});
			res.end();
		});
	});

	return router;
}