getETag method

Future<String?> getETag(
  1. String viewId
)

Get the cached ETag for a view (for delta updates).

Implementation

Future<String?> getETag(String viewId) async {
  final raw = await storage.read('$_prefix$viewId');
  if (raw == null) return null;
  final json = jsonDecode(raw) as Map<String, dynamic>;
  return json['etag'] as String?;
}