export interface ISocialButtonTypes {
  vk: {vk: string};
  fb: {fb: string};
  ok: {ok: string};
  twitter: {tw: string};
};

export type createSocialItem = <T extends keyof ISocialButtonTypes>(
  socialType: T,
  params: ISocialButtonTypes[T]
) => void;

function createSocialItem<T extends keyof ISocialButtonTypes>(
  socialType: T,
  params?: ISocialButtonTypes[T]
): ISocialButtonTypes[T] {
  return params
}
// the compiler show error, but suggest all keys
createSocialItem('vk', { ok: 'dwdw' })
                        ~~~~~~~~~~~~~