diff --git a/src/core/types.ts b/src/core/types.ts
new file mode 100644
index 0000000..de3ff00
--- /dev/null
+++ b/src/core/types.ts
@@ -0,0 +1,14 @@
+import { Dispatch, SetStateAction } from "react";
+
+export type ValueGetter<T> = () => T;
+export type ValueSetter<T> = (value: T) => void;
+
+export type AsyncGetter<T> = () => Promise<T>;
+export type AsyncSetter<T> = (value: T) => Promise<void>;
+
+export type Validator<T> = (value: T) => boolean;
+export type AsyncValidator<T> = (value: T) => Promise<boolean>;
+
+export type Transformer<T, R> = (value: T) => R;
+
+export type SetState<T> = Dispatch<SetStateAction<T>>;