loader.js

const load = protos => {
  const dirname = path.join(__dirname, config.rpc.protos)
  return fs.readdirSync(dirname)
    .reduce((accum, curr) => {
      if (curr.endsWith('.proto') == true) {
        const proto = path.join(__dirname, config.rpc.protos, curr)
        return [...accum, proto]
      }
    }, [])
}