import { Instrumentation, InstrumentationConfig } from '@opentelemetry/instrumentation';
import { MeterProvider, Span, TracerProvider } from '@opentelemetry/api';
interface FetchRequest {
    method: string;
    origin: string;
    path: string;
    headers: string | string[];
}
interface FetchResponse {
    headers: Buffer[];
    statusCode: number;
}
export interface FetchInstrumentationConfig extends InstrumentationConfig {
    ignoreRequestHook?: (request: FetchRequest) => boolean;
    onRequest?: (args: {
        request: FetchRequest;
        span: Span;
        additionalHeaders: Record<string, string | string[]>;
    }) => void;
}
export declare class FetchInstrumentation implements Instrumentation {
    private channelSubs;
    private spanFromReq;
    private tracer;
    private config;
    private meter;
    readonly instrumentationName = "opentelemetry-instrumentation-node-18-fetch";
    readonly instrumentationVersion = "1.0.0";
    readonly instrumentationDescription = "Instrumentation for Node 18 fetch via diagnostics_channel";
    private subscribeToChannel;
    constructor(config: FetchInstrumentationConfig);
    disable(): void;
    enable(): void;
    setTracerProvider(tracerProvider: TracerProvider): void;
    setMeterProvider(meterProvider: MeterProvider): void;
    setConfig(config: InstrumentationConfig): void;
    getConfig(): InstrumentationConfig;
    onRequest({ request }: {
        request: FetchRequest;
    }): void;
    onHeaders({ request, response }: {
        request: FetchRequest;
        response: FetchResponse;
    }): void;
    onDone({ request }: {
        request: FetchRequest;
    }): void;
    onError({ request, error }: {
        request: FetchRequest;
        error: Error;
    }): void;
}
export {};