diff --git a/lib/types/synced-metadata-types.js b/lib/types/synced-metadata-types.js
new file mode 100644
--- /dev/null
+++ b/lib/types/synced-metadata-types.js
@@ -0,0 +1,7 @@
+// @flow
+
+export type SyncedMetadata = { +[name: string]: string };
+
+export type SyncedMetadataStore = {
+  +syncedMetadata: SyncedMetadata,
+};