import type { CartLine, RenderExtensionPoint, CartLineChangeResult, CartLineChange } from '@shopify/checkout-ui-extensions';
/**
 * Returns the current line items for the checkout, and automatically re-renders
 * your component if line items are added, removed, or updated.
 */
export declare function useCartLines<ID extends RenderExtensionPoint = RenderExtensionPoint>(): CartLine[];
/**
 * Returns a function to mutate the `lines` property of checkout.
 */
export declare function useApplyCartLinesChange<ID extends RenderExtensionPoint = RenderExtensionPoint>(): (change: CartLineChange) => Promise<CartLineChangeResult>;
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