import { SupplyZone, DemandZone } from '../types';
/**
 * Filters out stale zones based on price-level freshness rules:
 *
 * - A demand zone can never be priced above a supply zone. If `demand.proximalLine`
 *   (the upper edge of the demand zone) is greater than `supply.proximalLine`
 *   (the lower edge of the supply zone), the zones are in conflict.
 *
 * - When a conflict is detected, the zone with the older `endTimestamp` is removed —
 *   it was effectively consumed by the price move that created the newer zone.
 *   On a tie, the demand zone is removed.
 *
 * The returned arrays preserve the original ordering of the surviving zones.
 *
 * @param supplyZones - Array of identified supply zones.
 * @param demandZones - Array of identified demand zones.
 * @returns A new object containing only the fresh, non-conflicting zones.
 */
export declare function filterFreshZones(supplyZones: SupplyZone[], demandZones: DemandZone[]): {
    supplyZones: SupplyZone[];
    demandZones: DemandZone[];
};