Adding type to the index.ts file

When using the framework using typescript and each lambda is in it own folders like stack/user/src/createUser/index.ts and stack/user/src/createUser/handler.ts, Is there a way to type the index.ts file?

export default {
  handler: 'src/createCampaignWithAds/handler.main',
  events: [
      http: {
        method: 'post',
        path: '/campaign/ads',
        private: true,
        cors: true,

How do I ad types to :point_up: