import { CallHandler, ExecutionContext, NestInterceptor } from '@nestjs/common';
import { Observable } from 'rxjs';
export declare type FastifyUploadedFile = {
    filename: string;
    path: string;
    mimetype: string;
    encoding: string;
};
export declare type FastifyUploadedFileRequest = /* FastifyRequest & */ any & {
    file: FastifyUploadedFile;
    files: FastifyUploadedFile[];
};
export declare class FastifyFileInterceptor implements NestInterceptor {
    private readonly field;
    constructor(field: string);
    intercept(context: ExecutionContext, next: CallHandler<any>): Observable<any> | Promise<Observable<any>>;
}