import type { MaybePromise } from '../types.js';
/**
 * Keyv compatible Store. See https://github.com/lukechilds/keyv
 */
export type Store<K extends string, V> = {
    readonly ttlSupport: boolean;
    /**
     * Get the current value of a key. Is undefined when the value is currently not set.
     */
    readonly get: (key: K) => MaybePromise<V | undefined>;
    /**
     * Set a key to a specific value.
     * @param key key to be set
     * @param value value to set to the key
     * @param ttl time to live of the object in milliseconds from now (when supported by the implementation)
     */
    readonly set: (key: K, value: V, ttl?: number) => MaybePromise<void>;
    /**
     * Delete a key from the store. Returns true when the key existed, false if the element does not exist.
     */
    readonly delete: (key: K) => MaybePromise<boolean>;
    /**
     * Remove all entries
     */
    readonly clear: () => MaybePromise<void>;
};
export type ExtendedStore<K extends string, V> = Store<K, V> & {
    /**
     * Return all currently set keys
     */
    readonly keys: () => MaybePromise<readonly K[]>;
};