/**
 * Channel discount — shared selection logic (mirrors smart-stays contracts/ts/channel-discount.ts).
 *
 * Acquisition discount per channel lives in `property_channel_discounts`.
 * Wallet loyalty discounts are separate and must never share this path.
 */
export type DiscountChannel = "website" | "agent";
export declare const DISCOUNT_CHANNELS: readonly DiscountChannel[];
/** Fallback when neither a channel row nor legacy value is present. */
export declare const DEFAULT_CHANNEL_DISCOUNT_PCT = 10;
/** DB CHECK headroom — dashboard offers 0..50. */
export declare const MAX_CHANNEL_DISCOUNT_PCT = 50;
export interface ChannelDiscountRow {
    channel: string;
    discount_pct: number | null;
}
export declare function isDiscountChannel(value: unknown): value is DiscountChannel;
/** Clamp to [0, MAX]. Non-finite input → 0. */
export declare function clampDiscountPct(pct: number): number;
/**
 * Resolve acquisition discount (%) for a channel.
 *
 * Precedence:
 *   1. explicit `property_channel_discounts` row for the channel
 *   2. legacy `properties.direct_booking_discount`
 *   3. {@link DEFAULT_CHANNEL_DISCOUNT_PCT}
 */
export declare function pickChannelDiscountPct(rows: ChannelDiscountRow[] | null | undefined, channel: DiscountChannel, legacyPct?: number | null): number;