export declare enum KeyGenerationStrategy {
    SIMPLE = "simple",
    CLUSTER_SAFE = "cluster-safe"
}
export declare enum KeyType {
    SLIDING_WINDOW = "z",
    BLOCK = "block"
}
export interface SlidingWindowMember {
    timestamp: number;
    uniqueId: string;
}
export declare class KeyGenerator {
    private static readonly DEFAULT_PREFIX;
    private static readonly MAX_KEY_LENGTH;
    private static readonly FORBIDDEN_CHARS;
    private readonly prefix;
    private readonly strategy;
    constructor(options?: {
        prefix?: string;
        strategy?: KeyGenerationStrategy;
    });
    generateKeys(identifier: string, throttlerName: string, prefix?: string): {
        zKey: string;
        blockKey: string;
    };
    generateMember(timestamp: number, uniqueId?: string): string;
    parseMember(member: string): SlidingWindowMember | null;
    validateKey(key: string): boolean;
    private sanitizeComponent;
    private generateUniqueId;
    private escapeRegExp;
}