import { type MouseEvent as ReactMouseEvent, type PointerEvent as ReactPointerEvent } from 'react';
import type { Overlay, Data } from '../../core/components/overlay-tooltip/types.js';
import type { SankeyShape } from '../types/sankey-shape.js';
import { useSankeyLayout } from './use-sankey-layout.js';
export declare function isSameHoveredShape(prev: SankeyShape | undefined, next: SankeyShape | undefined): boolean;
export declare function buildCoreTooltipData(shape: SankeyShape, layout: ReturnType<typeof useSankeyLayout>, formatter: (value: number) => string, nodeColors: Map<string, string>): Data | undefined;
export declare function useSankeyOverlayEvents(overlay: Overlay): {
    onPointerMove: (event: ReactPointerEvent<HTMLDivElement>) => void;
    onPointerLeave: () => void;
    onClick: (event: ReactMouseEvent<HTMLDivElement>) => void;
};
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