diff --git a/packages/taler-wallet-core/src/db.ts b/packages/taler-wallet-core/src/db.ts
index b9d86eb25..0c51a68c9 100644
--- a/packages/taler-wallet-core/src/db.ts
+++ b/packages/taler-wallet-core/src/db.ts
@@ -117,11 +117,17 @@ export const TALER_WALLET_MAIN_DB_NAME = "taler-wallet-main-v9";
 export const TALER_WALLET_META_DB_NAME = "taler-wallet-meta";
 
 /**
- * Stored backups, mainly created when manually importing a backup.
+ * Name of the "stored backups" database.
+ * Stored backups are created before manually importing a backup.
+ * We use IndexedDB for this purpose, since we don't have file system
+ * access on some platforms.
  */
 export const TALER_WALLET_STORED_BACKUPS_DB_NAME =
   "taler-wallet-stored-backups";
 
+/**
+ * Name of the "meta config" database.
+ */
 export const CURRENT_DB_CONFIG_KEY = "currentMainDbName";
 
 /**
@@ -133,6 +139,32 @@ export const CURRENT_DB_CONFIG_KEY = "currentMainDbName";
  */
 export const WALLET_DB_MINOR_VERSION = 10;
 
+
+
+/**
+ * Format of the operation status code: xyznnn
+ *
+ * x=1: active
+ *  yz=00: pending
+ *  yz=02: dialog
+ *  yz=03: aborting
+ *  yz=10: suspended
+ *  yz=13: suspended-aborting
+ * x=2: final
+ *  yz=00: done
+ *  yz=01: failed
+ *  yz=02: expired
+ *  yz=03: aborted
+ */
+// export const OperationStatusRange = {
+//   ActiveStart: 10000,
+//   ActiveEnd: 10999,
+//   SuspendedStart: 10999,
+//   SuspendedEnd: 10999,
+//   FinalStart: 20000,
+//   FinalEnd: 29999,
+//} as const;
+
 /**
  * Ranges for operation status fields.
  *