import Redis, { Cluster } from "ioredis";
import { StickyAssignmentsDocument, StickyAttributeKey, StickyBucketService } from "@growthbook/growthbook";
import { StickyBucketSettings } from "./index";
export declare class RedisStickyBucketService extends StickyBucketService {
    private client;
    private readonly connectionUrl;
    private readonly useCluster;
    private readonly clusterRootNodesJSON?;
    private readonly clusterOptions?;
    private readonly ttl?;
    private writeBuffer;
    constructor({ connectionUrl, useCluster, clusterRootNodesJSON, clusterOptionsJSON, ttl, }?: StickyBucketSettings);
    connect(): Promise<void>;
    getAllAssignments(attributes: Record<string, string>): Promise<Record<StickyAttributeKey, StickyAssignmentsDocument>>;
    getAssignments(_attributeName: string, _attributeValue: string): Promise<null>;
    saveAssignments(doc: StickyAssignmentsDocument): Promise<void>;
    onEvaluate(): Promise<void>;
    getClient(): Cluster | Redis | undefined;
}