From fe85814ec3d6f6f7b10681f994dbde88e5b25ffb Mon Sep 17 00:00:00 2001
From: Jan Romann <jan.romann@uni-bremen.de>
Date: Mon, 8 Jan 2024 16:18:19 +0100
Subject: [PATCH 1/2] fix(interaction-output): allow stored value to be `null`

---
 packages/core/src/interaction-output.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/interaction-output.ts b/packages/core/src/interaction-output.ts
index 68f2bf908..1abb8b36e 100644
--- a/packages/core/src/interaction-output.ts
+++ b/packages/core/src/interaction-output.ts
@@ -79,7 +79,9 @@ export class InteractionOutput implements WoT.InteractionOutput {
 
     async value<T>(): Promise<T> {
         // the value has been already read?
-        if (this.parsedValue != null) return this.parsedValue as T;
+        if (this.parsedValue !== undefined) {
+            return this.parsedValue as T;
+        }
 
         if (this.dataUsed) {
             throw new Error("Can't read the stream once it has been already used");

From fcfe687169fcf283cc85e267e645bcd52a7946c7 Mon Sep 17 00:00:00 2001
From: Jan Romann <jan.romann@uni-bremen.de>
Date: Tue, 9 Jan 2024 08:34:25 +0100
Subject: [PATCH 2/2] fix(interaction-output): restrict value method to
 DataSchemaValues

---
 packages/core/src/interaction-output.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/core/src/interaction-output.ts b/packages/core/src/interaction-output.ts
index 1abb8b36e..21b0b58d1 100644
--- a/packages/core/src/interaction-output.ts
+++ b/packages/core/src/interaction-output.ts
@@ -77,7 +77,7 @@ export class InteractionOutput implements WoT.InteractionOutput {
         return data;
     }
 
-    async value<T>(): Promise<T> {
+    async value<T extends WoT.DataSchemaValue>(): Promise<T> {
         // the value has been already read?
         if (this.parsedValue !== undefined) {
             return this.parsedValue as T;