https://bobbyhadz.com/blog/typescript-create-type-from-object-keys#:~:text=Use%20the%20keyof%20typeof%20syntax,the%20object's%20keys%20as%20strings.

type-from-object-keys

//--CASE 1
const person = {
  name: 'Tom',
  age: 30,
  country: 'Chile',
};

// 👇️ type Keys = "name" | "age" | "country"
type Keys = keyof typeof person;

// 👇️ type Values = string | number
type Values = typeof person[Keys];


//--CASE 2
type Person = {
  name: string;
  age: number;
  country: string;
};

// 👇️ type Keys = "name" | "age" | "country"
type Keys = keyof Person;