const { struct } = require('superstruct')
const validate = require('koa-superstruct')
const schema = struct({
  body: {
    id: 'number',
    title: 'string',
    isPublished: 'boolean?',
    tags: ['string'],
    author: {
      id: 'number'
    }
  }
})
router.post('/entry', validate(schema), handler)

const schema = struct({
  headers: {
    'X-Foo': 'string'
  },
  body: {
    'count': 'number'
  },
  query: {
    'page': 'number?'
  },
  params: {
    'slug': 'string'
  }
})
validate(schema)