const storage = require('../storage'); module.exports = async function(req, res) { const id = req.params.id; const ownerToken = req.body.owner_token; if (!ownerToken) { return res.sendStatus(400); } const dlimit = req.body.dlimit; if (!dlimit || dlimit > 20) { return res.sendStatus(400); } try { const meta = await storage.metadata(id); if (meta.owner !== ownerToken) { return res.sendStatus(400); } storage.setField(id, 'dlimit', dlimit); res.sendStatus(200); } catch (e) { res.sendStatus(404); } };