diff --git a/lib/utils.d.ts b/lib/utils.d.ts
new file mode 100644
index 000000000..11d6c4213
--- /dev/null
+++ b/lib/utils.d.ts
@@ -0,0 +1,14 @@
+/**
+ * Merges two objects and removes null values if "shouldRemoveNullObjectValues" is set to true
+ *
+ * We generally want to remove null values from objects written to disk and cache, because it decreases the amount of data stored in memory and on disk.
+ * On native, when merging an existing value with new changes, SQLite will use JSON_PATCH, which removes top-level nullish values.
+ * To be consistent with the behaviour for merge, we'll also want to remove null values for "set" operations.
+ */
+declare function fastMerge<T>(
+    target: T,
+    source: T,
+    shouldRemoveNullObjectValues: boolean = true
+): T;
+
+export default { fastMerge };