export type SessionIndexRedisLike = {
    get(key: string): Promise<any | null | undefined>;
    set(key: string, data: any, ttl?: number): Promise<boolean>;
    ttl(key: string): Promise<number>;
    zadd(key: string, score: number, member: string): Promise<number>;
    zrem(key: string, ...members: string[]): Promise<number>;
    zrangeWithScores(key: string, start: number, stop: number): Promise<{
        member: string;
        score: number;
    }[]>;
};
export declare const SESSION_INDEX_PREFIX = "sess_idx";
export declare function buildSessionIndexKey(userId: string, appKey?: string): string | null;
export declare function sessionRedisMemberKey(token: string, userId: string): string;
export declare function addSessionToIndex(redis: SessionIndexRedisLike, token: string, userId: string, appKey: string | undefined, loggedInAt: number): Promise<void>;
export declare function removeSessionFromIndex(redis: SessionIndexRedisLike, token: string, userId: string, appKey?: string): Promise<void>;
export declare function kickOldestExcessSessions(redis: SessionIndexRedisLike, getRequest: () => any, userId: string, apiKey: {
    app_key?: string;
    max_session?: number;
} | undefined, currentToken: string): Promise<void>;