import { Engine, Zodiac } from "./chart.js";
/** Period length in 360-day years for each sign, Aries..Pisces. */
export declare const ZR_PERIODS: readonly [15, 8, 20, 25, 19, 20, 8, 15, 12, 27, 30, 12];
/** Days per period unit at each level (each a twelfth of the one above). */
export declare const LEVEL_UNIT: Record<number, number>;
export interface ZrPeriod {
    level: number;
    sign: string;
    lord: string;
    start: number;
    end: number;
    /** True when this period is the loosing of the bond (jumped to the opposite sign). */
    lb: boolean;
}
/** Flat timeline of releasing periods down to `maxLevel` over `horizonYears`
 *  (360-day years) from birth. */
export declare function zrRelease(lotSign: number, natalJd: number, maxLevel?: number, horizonYears?: number): ZrPeriod[];
export interface ZrActive {
    l1: string;
    l2: string;
    l3: string;
    l4: string;
}
/** The L1..L4 releasing signs active at `targetJd`; null outside the span. */
export declare function zrActive(lotSign: number, natalJd: number, targetJd: number): ZrActive | null;
/** Zodiacal releasing active at `targetJd`, releasing from the Lot of Spirit
 *  (default) or Fortune of the natal chart. */
export declare function zrAt(engine: Engine, natalJd: number, targetJd: number, lat: number, lonEast: number, lot?: "spirit" | "fortune", zodiac?: Zodiac): {
    lot: string;
    lot_sign: string;
    day: boolean;
} & Partial<ZrActive>;