feat: Verify conditions in DataAccessorBasedStore

src/util/errors/PreconditionFailedHttpError.ts

@@ -0,0 +1,15 @@
+import type { HttpErrorOptions } from './HttpError';
+import { HttpError } from './HttpError';
+
+/**
+ * An error thrown when access was denied due to the conditions on the request.
+ */
+export class PreconditionFailedHttpError extends HttpError {
+  public constructor(message?: string, options?: HttpErrorOptions) {
+    super(412, 'PreconditionFailedHttpError', message, options);
+  }
+
+  public static isInstance(error: any): error is PreconditionFailedHttpError {
+    return HttpError.isInstance(error) && error.statusCode === 412;
+  }
+}