unwrap_future.nim

import asyncdispatch

proc unwrap[T](outer: Future[Future[T]]): Future[T] =
  result = newFuture[T]()
  let res = result
  outer.addCallback do:
    # TODO try/catch to handle errors
    outer.read().addCallback do (inner: Future[T]):
      res.complete(inner.read())


proc addDoubleWrapped*(a, b: Future[Future[int]]): Future[int] {.async.} =
  return await(a.unwrap) + await(b.unwrap)