export declare const isNative: (marketplace: string) => marketplace is "MarketPlace.Native";
export declare const isOpensea: (marketplace: string) => marketplace is "MarketPlace.OpenSea";
/**
 * Listings are not hideable in either direction; the API rejects them, so the
 * caller is told here instead of spending a round trip on a doomed call.
 */
export declare const assertHideableOrder: (isAsk: boolean) => void;