export type PurchaseAnalyticsAttributesInput = {
    amountCents?: unknown;
    attribution?: unknown;
    couponId?: unknown;
    currency?: unknown;
    environment?: unknown;
    funnelId?: unknown;
    funnelUserDocument?: unknown;
    funnelVersion?: unknown;
    funnelVersionId?: unknown;
    geoCity?: unknown;
    geoCountry?: unknown;
    ipAddress?: unknown;
    planId?: unknown;
    projectId?: unknown;
    providerPlanId?: unknown;
    checkoutStartSource?: unknown;
    checkout_start_source?: unknown;
    stepId?: unknown;
    step_id?: unknown;
    stepName?: unknown;
    step_name?: unknown;
    stepType?: unknown;
    step_type?: unknown;
    transactionId?: unknown;
    timezone?: unknown;
    url?: unknown;
    userAgent?: unknown;
    cwClientUserId?: unknown;
    cw_client_user_id?: unknown;
    userId?: unknown;
    value?: unknown;
};
export declare const sanitizePurchaseUrl: (value: unknown) => string | undefined;
export declare const currentBrowserPurchaseUrl: () => string | undefined;
export declare const buildPurchaseAnalyticsAttributes: (input?: PurchaseAnalyticsAttributesInput & Record<string, unknown>, options?: {
    includeUrl?: boolean;
}) => Record<string, unknown>;
export declare const buildBrowserPurchaseAnalyticsAttributes: (input?: PurchaseAnalyticsAttributesInput & Record<string, unknown>) => Record<string, unknown>;
export declare const toStripeMetadata: (attributes: Record<string, unknown>) => Record<string, string>;
export declare const buildStripePurchaseMetadata: (input?: PurchaseAnalyticsAttributesInput & Record<string, unknown>) => Record<string, string>;