import { FastifyPluginOptions } from "fastify";
declare class LogExt {
    #private;
    add(exp: unknown, key: string, value: unknown): void;
    toString(): string;
    valueOf(): {};
}
declare class LogDebug {
    #private;
    append(exp: unknown, value: unknown): void;
    toString(): string;
    valueOf(): any[];
}
declare module 'fastify' {
    interface FastifyRequest {
        startTime: number;
        ext: LogExt;
        debug: LogDebug;
    }
}
export declare const loggerHook: any;
export interface loggerHookOptions extends FastifyPluginOptions {
    onError?: boolean;
    404?: boolean;
    onSend?: boolean;
    onRequest?: boolean;
}
export {};