Rename key of object in TypeScript while keeping the object immutable

renameKey.ts

export function renameKey<T extends object, K extends keyof T, N extends string>(
  obj: T,
  oldProp: K,
  newProp: N
): Omit<T, K> & { [P in N]: T[K] } {
  const { [oldProp]: oldValue, ...rest } = obj;
  return {
    ...rest,
    [newProp]: oldValue,
  } as Omit<T, K> & { [P in N]: T[K] };
}