From f4b7fc78f7a15c44c74ddfe4ae19ca23d81a02ff Mon Sep 17 00:00:00 2001
From: Alex Potsides <alex@achingbrain.net>
Date: Tue, 4 Apr 2023 11:45:38 +0100
Subject: [PATCH] fix: default sink return type to unknown (#46)

Otherwise sync duplexes have to override the return type.
---
 src/index.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/index.ts b/src/index.ts
index b9512a3..3ab7012 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -12,7 +12,7 @@ export interface Transform<A, B = A> {
  * function that takes a source and iterates over it. It optionally returns
  * a value.
  */
-export interface Sink<Source, R = Promise<void>> {
+export interface Sink<Source, R = unknown> {
   (source: Source): R
 }
 
@@ -32,7 +32,7 @@ export type Source<T> = AsyncIterable<T> | Iterable<T>
  * necessarily connected to the values that can be consumed from it. It is
  * an object with two properties, sink and source.
  */
-export interface Duplex<TSource = unknown, TSink = TSource, RSink = Promise<void>> {
+export interface Duplex<TSource = unknown, TSink = TSource, RSink = unknown> {
   source: TSource
   sink: Sink<TSink, RSink>
 }