import { GraphQLProxy, ProxyContext } from '../types';
import { HttpClient } from '../core/http-client';
/**
 * GraphQL proxy implementation with enhanced error handling
 */
export declare class GraphQLProxyFactory {
    private httpClient;
    private baseUrl;
    private headers;
    private static readonly GRAPHQL_OPERATIONS;
    constructor(httpClient: HttpClient, baseUrl: string, headers: Record<string, string>);
    /**
     * Creates GraphQL proxy
     */
    createProxy(ctx: ProxyContext): GraphQLProxy;
    /**
     * Optimized GraphQL operation validation
     */
    private isValidGraphQLOperation;
    /**
     * Creates operation-specific proxy
     */
    private createOperationProxy;
    /**
     * Creates GraphQL query builder with improved caching
     */
    private createQueryBuilder;
    /**
     * Builds GraphQL operation with enhanced error handling and validation
     */
    private buildGraphQLOperation;
    /**
     * Executes GraphQL query with comprehensive error handling
     */
    private executeGraphQLQuery;
}