import { type TimeDescriptor } from '@sindresorhus/to-milliseconds';
export declare function timeInTheFuture(time: TimeDescriptor): number;
type Primitive = boolean | number | string;
type Value = Primitive | Primitive[] | Record<string, any>;
type CachedValue<Value> = {
    data: Value;
    maxAge: number;
};
declare function has(key: string): Promise<boolean>;
export declare function _get<ScopedValue extends Value>(key: string, remove: boolean): Promise<CachedValue<ScopedValue> | undefined>;
declare function get<ScopedValue extends Value>(key: string): Promise<ScopedValue | undefined>;
declare function set<ScopedValue extends Value>(key: string, value: ScopedValue, maxAge?: TimeDescriptor): Promise<ScopedValue>;
declare function delete_(userKey: string): Promise<void>;
declare function clear(): Promise<void>;
export type CacheKey<Arguments extends unknown[]> = (arguments_: Arguments) => string;
export type MemoizedFunctionOptions<Arguments extends unknown[], ScopedValue> = {
    maxAge?: TimeDescriptor;
    staleWhileRevalidate?: TimeDescriptor;
    cacheKey?: CacheKey<Arguments>;
    shouldRevalidate?: (cachedValue: ScopedValue) => boolean;
};
/** @deprecated Use CachedValue and CachedFunction instead */
declare const cache: {
    has: typeof has;
    get: typeof get;
    set: typeof set;
    clear: typeof clear;
    delete: typeof delete_;
};
export default cache;