import Redis from "ioredis";
import { ICacheStorage } from "./storage-interface";
/**
 * Redis cache storage (implements cache signatures)
 * All items are stored in redis and are immutable after retrieval
 * because they might be shared between threads to prevent data corruption
 */
export declare class RedisStorage implements ICacheStorage {
    private cache;
    /**
     * Create a wrapper class for ioredis package
     * @param redisInstance ioredis instance
     */
    constructor(redisInstance: Redis);
    /**
     * Retrieves cache key
     * @param key
     * @returns
     */
    get<T>(key: string, immutable?: boolean): Promise<T | undefined>;
    /**
     * Sets cache key
     * @param key key to be set
     * @param ttlMilliseconds milliseconds to keep in cache
     * @param value value to store
     */
    set<T>(key: string, ttlMilliseconds: number, value: T, immutable?: boolean): Promise<void>;
    /**
     *
     * @param key
     * @returnsv Promise<void>
     */
    evict(key: string): Promise<void>;
}
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