diff --git a/src/indexed-db.ts b/src/indexed-db.ts
index 7c85aeb..81bf47f 100644
--- a/src/indexed-db.ts
+++ b/src/indexed-db.ts
@@ -50,4 +50,17 @@ class SlopDB {
 
         return db_promise
     }
+}
+
+class CheckCache {
+    slopdb: SlopDB
+
+    constructor(slopdb: SlopDB) {
+        this.slopdb = slopdb
+    }
+
+    start_transaction(mode: IDBTransactionMode): IDBTransaction {
+        const transaction = this.slopdb.db.transaction("checkcache", mode)
+        return transaction
+    }
 }
\ No newline at end of file