I have a type describing an object

type MyObject = {
  foo: 1, 
  bar?: boolean
}

I want to create an array of all keys of given object, and I want TypeScript to notify me whenever my array is incomplete (is missing one or more keys of myObject), or includes items that are not keys of myObject.

One way I can think of is

1. creating an instance of an intermediary object with the same keys as myObject,
2. using TypeScript to ensure they have they have the same keys
3. generating a keys array from that object instance

// The object assignment should throw if I'm missing a key of MyObject
// and I should get `Object literal may only specify known properties` if I add extra props
const intermediaryObject: { [key in keyof Required<MyObject>]: true }  = {                 
  foo: true,
  bar: true
}

const myObjectKeys = Object.keys(intermediaryObject)

But this gets a bit annoying when working with large objects – is there a way to enforce those constraints without the need for creating intermediary objects?