From bf4d1b6e9ccf26fec0931c6a2d6d5f05b7fc40a3 Mon Sep 17 00:00:00 2001
From: robal <robert@warp.cc>
Date: Wed, 15 Mar 2023 15:35:55 +0100
Subject: [PATCH] fix: do not modify KV store in case of view operations

---
 src/core/modules/impl/handler/WasmHandlerApi.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/core/modules/impl/handler/WasmHandlerApi.ts b/src/core/modules/impl/handler/WasmHandlerApi.ts
index 9c1b6fc4..9e1cc69c 100644
--- a/src/core/modules/impl/handler/WasmHandlerApi.ts
+++ b/src/core/modules/impl/handler/WasmHandlerApi.ts
@@ -62,6 +62,10 @@ export class WasmHandlerApi<State> extends AbstractContractHandler<State> {
         };
       }
     } finally {
+      if (interactionData.interaction.interactionType === 'view') {
+        // view calls are not allowed to perform any KV modifications
+        await this.swGlobal.kv.rollback();
+      }
       await this.swGlobal.kv.close();
     }
   }