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How do I await a completableFuture inside an effect {} block?

The same as you would regularly do with KotlinX Coroutines, <https://kotlinlang.org/api/kotlinx.coroutines/kotlinx-coroutines-jdk8/>

I think I might be misunderstanding something then, using kotlinx-coroutines-jdk8 with the .await() extension gives me a type F!. How do I actually work with this? I was trying to achieve something similar as the awaitFirst() in the coroutines reactive streams API

`F!`? :thinking_face:

This should give you simply `A`, <https://kotlinlang.org/api/kotlinx.coroutines/kotlinx-coroutines-jdk8/kotlinx.coroutines.future/await.html>.

It might return a _platform type_ `!` which means that Kotlin didn't find `@NonNull` or `@Nullable` and it's up to you to check the Java API and deal with potential `null` coming from Java.

Was just me getting my types wrong :zipper_mouth_face:

Are you using a Java <https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CompletableFuture.html> instead of a Kotlin Coroutines <https://kotlinlang.org/api/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines/-completable-deferred/> ?

If so I believe there is an extension function somewhere in the coroutines lib to convert between them

Yeah, there's a function in the coroutines-jdk8 module that has transformers. I had just messed up some generic types so everything was a bit wonky. Got it working now :slightly_smiling_face: