/**
 * AttributeResolver - Handles attribute resolution and request enhancement
 *
 * Responsibilities:
 * - Enhance requests with attributes from providers
 * - Resolve attribute references
 * - Get attribute values from request
 * - Manage attribute providers
 */
import { ILogger } from '../../logger';
import { ABACRequest, AttributeProvider, AttributeValue } from '../types';
export declare class AttributeResolver {
    private attributeProviders;
    private logger;
    constructor(logger: ILogger, providers?: AttributeProvider[]);
    /**
     * Add an attribute provider
     */
    addProvider(provider: AttributeProvider): void;
    /**
     * Remove an attribute provider
     */
    removeProvider(key: string): void;
    /**
     * Get all attribute providers
     */
    getProviders(): AttributeProvider[];
    /**
     * Get attribute value from request
     */
    getAttributeValue(request: ABACRequest, category: 'subject' | 'resource' | 'action' | 'environment', attributeId: string, path?: string): AttributeValue | undefined;
    /**
     * Enhance request with additional attributes from providers
     */
    enhanceRequest(request: ABACRequest): Promise<ABACRequest>;
}
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