export type WebStorageArea = Pick<Storage, "getItem" | "setItem" | "removeItem">;
export type StoredJsonResult<T> = {
    ok: true;
    value: T;
} | {
    ok: false;
    value: T | null;
    error: "unavailable" | "missing" | "invalid";
};
export declare function readStoredJson<T>(key: string, fallback: T, storage?: WebStorageArea): StoredJsonResult<T>;
export declare function writeStoredJson<T>(key: string, value: T, storage?: WebStorageArea): {
    ok: true;
} | {
    ok: false;
    error: "unavailable" | "quota";
};
export declare function removeStoredValue(key: string, storage?: WebStorageArea): {
    ok: true;
} | {
    ok: false;
    error: "unavailable";
};
//# sourceMappingURL=storage.d.ts.map