From b2d0ad57ddf251a109d536cdc49fb6505dbdc50c Mon Sep 17 00:00:00 2001
From: Florian Dold <florian@dold.me>
Date: Tue, 11 Jul 2023 15:41:48 +0200
Subject: sqlite3 backend for idb-bridge / wallet-core

---
 packages/idb-bridge/src/backend-common.ts | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 packages/idb-bridge/src/backend-common.ts

(limited to 'packages/idb-bridge/src/backend-common.ts')

diff --git a/packages/idb-bridge/src/backend-common.ts b/packages/idb-bridge/src/backend-common.ts
new file mode 100644
index 000000000..d52071939
--- /dev/null
+++ b/packages/idb-bridge/src/backend-common.ts
@@ -0,0 +1,29 @@
+import { openPromise } from "./util/openPromise.js";
+
+export class AsyncCondition {
+  _waitPromise: Promise<void>;
+  _resolveWaitPromise: () => void;
+  constructor() {
+    const op = openPromise<void>();
+    this._waitPromise = op.promise;
+    this._resolveWaitPromise = op.resolve;
+  }
+
+  wait(): Promise<void> {
+    return this._waitPromise;
+  }
+
+  trigger(): void {
+    this._resolveWaitPromise();
+    const op = openPromise<void>();
+    this._waitPromise = op.promise;
+    this._resolveWaitPromise = op.resolve;
+  }
+}
+
+export enum TransactionLevel {
+  None = 0,
+  Read = 1,
+  Write = 2,
+  VersionChange = 3,
+}
-- 
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