/**
 * Local draft-state reducers + initialization helpers.
 *
 * The journey holds the draft as a single useState at the root and
 * passes immutable views down to step components, which call the
 * supplied setter to apply patches. Per
 * booking-journey-architecture §4.
 */
import type { BookingDraftV1 } from "@voyant-travel/catalog-contracts/booking-engine/contracts";
export type Draft = BookingDraftV1;
export interface DraftEntityIdentity {
    module: string;
    id: string;
    /**
     * Source kind. Empty string on the storefront before the engine's
     * server-side resolver fills it in; operator-side wiring sets
     * the real kind upfront.
     */
    sourceKind: string;
    sourceConnectionId?: string;
    sourceRef?: string;
}
export declare function emptyDraft(entity: DraftEntityIdentity, defaults?: {
    buyerType?: "B2C" | "B2B";
}): Draft;
export declare function patchConfigure(draft: Draft, patch: Partial<Draft["configure"]>): Draft;
export declare function patchBilling(draft: Draft, patch: Partial<Draft["billing"]>): Draft;
export declare function setBillingBuyerType(draft: Draft, buyerType: "B2C" | "B2B"): Draft;
export declare function canCopyBillingContactToTraveler(contact: Draft["billing"]["contact"]): boolean;
export declare function patchPaxCount(draft: Draft, band: string, count: number): Draft;
export declare function setTravelers(draft: Draft, travelers: Draft["travelers"]): Draft;
export declare function setAccommodation(draft: Draft, accommodation: Draft["accommodation"]): Draft;
export declare function setAddons(draft: Draft, addons: Draft["addons"]): Draft;
export declare function setPayment(draft: Draft, payment: Draft["payment"]): Draft;
export declare function totalPax(draft: Draft): number;