import type { SessionMetadataCollect } from './sessionMetadataV3.js';
/** Line snapshot for checkout session idempotency (customer PWA + kiosk parity). */
export interface CartLineFingerprintLine {
    readonly productId: number;
    readonly variantId: number | null;
    readonly quantity: number;
}
export interface CartLineFingerprintInput {
    readonly tenantCode: string;
    readonly kioskId: number;
    readonly purposeType: string;
    readonly flowType: string;
    readonly checkoutSubMode: string;
    readonly collect: SessionMetadataCollect | null;
    readonly lines: readonly CartLineFingerprintLine[];
    readonly customerId?: number | null;
    /** Bumped after `409 IDEMPOTENCY_CONFLICT` so the shopper can retry checkout. */
    readonly revision?: number;
}
export declare function buildCustomerIdentityDimension(customerId: number | null | undefined): string;
export declare function buildCollectHash(collect: SessionMetadataCollect | null): string;
export declare function buildLinesFingerprint(lines: readonly CartLineFingerprintLine[]): string;
/**
 * Stable idempotency key for `POST /customer-checkout/sessions`.
 *
 * Dimensions (ADR): tenantCode | kioskId | purposeType | flowType |
 * checkoutSubMode | collectHash | linesFingerprint | customerIdentityDimension
 */
export declare function buildCheckoutSessionIdempotencyKey(input: CartLineFingerprintInput): string;
export declare function mapShopCartLinesToFingerprintLines(lines: ReadonlyArray<{
    readonly product: {
        readonly id: number;
    };
    readonly variant: {
        readonly id: number;
    } | null;
    readonly quantity: number;
}>): CartLineFingerprintLine[];
//# sourceMappingURL=CartLineFingerprint.d.ts.map