MyPromise.ts

type MyPromise<T> = Promise<Awaited<T>>

async function call<T extends () => any>(fn: T): MyPromise<ReturnType<T>> {
  return fn()
}

const res = call(() =>
  call(() =>
    call(() =>
      call(() =>
        call(() =>
          call(() =>
            call(() =>
              call(() =>
                call(() =>
                  call(() =>
                    call(() =>
                      call(() =>
                        call(() =>
                          call(() =>
                            call(() =>
                              call(() =>
                                call(() =>
                                  call(() =>
                                    call(() =>
                                      call(() => call(() => call(() => {}))),
                                    ),
                                  ),
                                ),
                              ),
                            ),
                          ),
                        ),
                      ),
                    ),
                  ),
                ),
              ),
            ),
          ),
        ),
      ),
    ),
  ),
)