import { CanActivate, ExecutionContext } from '@nestjs/common';
import { Reflector } from '@nestjs/core';
/**
 * Role-based authorization guard
 * Checks if the authenticated user has the required roles
 */
export declare class RolesGuard implements CanActivate {
    private reflector;
    /**
     * Creates an instance of RolesGuard
     * @param reflector - Reflector service for metadata access
     */
    constructor(reflector: Reflector);
    /**
     * Checks if the user has the required roles
     * @param context - Execution context
     * @returns True if user has required roles, false otherwise
     */
    canActivate(context: ExecutionContext): boolean;
}