import { Node } from '../../types/core';
import { ExternalDataReference } from '../../types/NodeDefinition';
/**
 * External data state
 */
export type ExternalDataState = {
    data: unknown;
    isLoading: boolean;
    error: Error | null;
};
/**
 * External data state with actions
 */
export type ExternalDataStateWithActions = ExternalDataState & {
    refresh: () => void;
    update: (data: unknown) => Promise<void>;
};
/**
 * Comparison result for external data state changes
 */
export type ExternalDataStateComparison = {
    objectChanged: boolean;
    dataChanged: boolean;
    isLoadingChanged: boolean;
    errorChanged: boolean;
    refreshChanged: boolean;
    updateChanged: boolean;
};
/**
 * Compare two external data states and return detailed comparison
 */
export declare function compareExternalDataStates(prev: ExternalDataStateWithActions | null | undefined, next: ExternalDataStateWithActions | null | undefined): ExternalDataStateComparison;
/**
 * Check if external data states are equal (shallow comparison of values)
 */
export declare function areExternalDataStatesEqual(prev: ExternalDataStateWithActions | null | undefined, next: ExternalDataStateWithActions | null | undefined): boolean;
/**
 * Hook for managing external data for a node
 */
export declare function useExternalData(node: Node | null, externalRef?: ExternalDataReference): ExternalDataStateWithActions;
/**
 * Hook for managing multiple external data references
 */
export declare function useExternalDataMap(nodes: Record<string, Node>, externalRefs: Record<string, ExternalDataReference>): Record<string, ExternalDataState>;