import { NestInterceptor, ExecutionContext, CallHandler } from '@nestjs/common';
import { Observable } from 'rxjs';
/**
 * Interceptor to enforce feature flag rules in real-time.
 *
 * FLOW:
 * 1. Runs AFTER middleware has attached feature flags to the request.
 * 2. Checks if the requested feature is enabled.
 * 3. If disabled, blocks the request with an HTTP 403.
 * 4. If enabled, passes the request to the controller/service.
 */
export declare class ErrorHandlingInterceptor implements NestInterceptor {
    private readonly logger;
    intercept(context: ExecutionContext, next: CallHandler): Observable<unknown>;
}
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