import { Configuration, FetchCompleteContext, XhrCompleteContext } from '@cloudsnorkel/datadog-browser-core';
export interface TracingResult {
    spanId: TraceIdentifier;
    traceId: TraceIdentifier;
}
export interface Tracer {
    traceFetch: (context: Partial<FetchCompleteContext>) => TracingResult | undefined;
    traceXhr: (context: Partial<XhrCompleteContext>, xhr: XMLHttpRequest) => TracingResult | undefined;
}
export declare function startTracer(configuration: Configuration): Tracer;
export declare function isTracingSupported(): boolean;
export declare class TraceIdentifier {
    private buffer;
    constructor();
    toString(radix: number): string;
    /**
     * Format used everywhere except the trace intake
     */
    toDecimalString(): string;
    private readInt32;
}