export declare const DEFAULT_NAMESPACE = "bull-board:metrics";
export declare const GLOBAL_QUEUE = "__global__";
/** Marks the hourly rollup key so it can't be mistaken for a minute-level day hash. */
export declare const HOUR_TIER = "hour";
export declare function minuteToDay(minute: number): string;
/** Absolute hour index, the hourly counterpart of the absolute minute index. */
export declare function minuteToHour(minute: number): number;
export declare function shiftDay(day: string, offsetDays: number): string;
export declare function dayToStartMs(day: string): number;
export declare function dayRange(fromMs: number, toMs: number): string[];
export declare function resolveNamespace(prefix: string | undefined, clustered: boolean): string;
export interface MetricsKeys {
    namespace: string;
    day(queue: string, metric: string, day: string): string;
    hour(queue: string, metric: string, day: string): string;
    totals(queue: string, metric: string): string;
    lease(queue: string): string;
    watermark(queue: string): string;
    scanPattern: string;
}
export declare function metricsKeys(namespace: string): MetricsKeys;