export type CacheStorage<KeyType, ValueType> = {
    get: (key: KeyType) => Promise<ValueType | undefined> | ValueType | undefined;
    set: (key: KeyType, value: ValueType) => Promise<unknown> | unknown;
};
export type CacheKey<Params extends Record<string, any>, KeyType = string> = (params: Params) => KeyType | Promise<KeyType>;
export declare function defaultCacheKey<Params extends Record<string, any>>(params: Params): string;