From 8513f5c413708d7f09ecd17d770c6ec10bb94e47 Mon Sep 17 00:00:00 2001
From: "J. Ryan Stinnett" <jryans@gmail.com>
Date: Mon, 25 Mar 2019 15:33:28 +0000
Subject: [PATCH] Add an IndexedDB existence check to the crypto store

This will be useful for future storage diagnostics as part of
https://github.com/vector-im/riot-web/issues/9271.
---
 src/crypto/store/indexeddb-crypto-store.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/crypto/store/indexeddb-crypto-store.js b/src/crypto/store/indexeddb-crypto-store.js
index 5f9defd02..4c28d9cfe 100644
--- a/src/crypto/store/indexeddb-crypto-store.js
+++ b/src/crypto/store/indexeddb-crypto-store.js
@@ -22,6 +22,7 @@ import LocalStorageCryptoStore from './localStorage-crypto-store';
 import MemoryCryptoStore from './memory-crypto-store';
 import * as IndexedDBCryptoStoreBackend from './indexeddb-crypto-store-backend';
 import {InvalidCryptoStoreError} from '../../errors';
+import * as IndexedDBHelpers from "../../indexeddb-helpers";
 
 /**
  * Internal module. indexeddb storage for e2e.
@@ -48,6 +49,10 @@ export default class IndexedDBCryptoStore {
         this._backendPromise = null;
     }
 
+    static exists(indexedDB, dbName) {
+        return IndexedDBHelpers.exists(indexedDB, dbName);
+    }
+
     /**
      * Ensure the database exists and is up-to-date, or fall back to
      * a local storage or in-memory store.