import { ClusterNode, ClusterOptions, SentinelConnectionOptions } from "ioredis";
import { Context, CacheRefreshStrategy } from "../../types";
import type { MemoryCache } from "./MemoryCache";
import type { RedisCache } from "./RedisCache";
import type { MongoCache } from "./MongoCache";
import { CacheRefreshScheduler } from "./scheduler";
export interface CacheEntry {
    payload: unknown;
    staleOn: Date;
    expiresOn?: Date;
}
export interface CacheSettings {
    staleTTL?: number;
    expiresTTL?: number | "never";
    allowStale?: boolean;
    cacheRefreshStrategy?: CacheRefreshStrategy;
    connectionUrl?: string;
    databaseName?: string;
    collectionName?: string;
    useAdditionalMemoryCache?: boolean;
    publishPayloadToChannel?: boolean;
    useCluster?: boolean;
    clusterRootNodesJSON?: ClusterNode[];
    clusterOptionsJSON?: ClusterOptions;
    useSentinel?: boolean;
    sentinelConnectionOptionsJSON?: SentinelConnectionOptions;
}
export type FeaturesCache = MemoryCache | RedisCache | MongoCache | null;
export declare let featuresCache: FeaturesCache;
export declare let cacheRefreshScheduler: CacheRefreshScheduler | undefined;
export declare const initializeCache: (context: Context) => Promise<void>;