/**
 * Finalize an active giveaway by selecting winners, persisting results, and
 * notifying participants.
 *
 * The implementation is idempotent: if the giveaway has already ended or been
 * cancelled the function resolves early without side effects. When the
 * giveaway is still active it marks the record as ended, updates the message,
 * moves the giveaway to the recent list, optionally DMs winners, and cleans up
 * any scheduled jobs.
 *
 * @param giveawayId - Unique identifier of the giveaway to finalize.
 * @returns Promise that resolves once the giveaway has been processed.
 * @example
 * await endGiveaway('01HQRS5F1GZ9J3YF7WXT7H2K2B')
 */
export declare function endGiveaway(giveawayId: string): Promise<void>;
/**
 * Reroll a completed giveaway, selecting additional winners from the remaining
 * eligible entrants.
 *
 * Previously selected winners (including historical rerolls) are excluded from
 * the candidate pool, ensuring no duplicates are produced. The giveaway
 * message is updated to display the full winner list and the new winners are
 * appended to the reroll history.
 *
 * @param giveawayId - Unique identifier of the giveaway being rerolled.
 * @param count - Number of new winners to draw from remaining entrants.
 * @returns Promise that resolves to the newly selected winner IDs (empty array
 * if insufficient eligible entrants remain).
 * @example
 * const newWinners = await rerollWinners('01HQRS5F1GZ9J3YF7WXT7H2K2B', 2)
 */
export declare function rerollWinners(giveawayId: string, count: number): Promise<string[]>;
/**
 * Randomly select winners from an entrant map without replacement.
 *
 * Uses the Fisher–Yates shuffle to guarantee unbiased permutations of the
 * candidate list, then slices the requested number of winners. The contained
 * `giveaway` context is currently unused by the algorithm but provides rich
 * metadata for future weighting strategies.
 *
 * @param entries - Map of eligible user IDs to entry weights.
 * @param count - Maximum number of winners to select.
 * @returns Array of selected user IDs; length can be less than `count` when
 * there are not enough entrants.
 */
declare function selectWinners(entries: Record<string, number>, count: number): string[];
export declare const __test: {
    selectWinners: typeof selectWinners;
};
export {};