/// <reference types="lodash" />
import * as _ from 'lodash';
import Span from './Span';
import { TracerConfiguration } from './interfaces';
export declare const defaultConfig: {
    minimumDurationMs: number;
    sampleRate: number;
    globalMetadata: {};
    globalTags: {};
};
export default class Tracer {
    private config;
    private spanStack;
    private reporter;
    constructor(config: TracerConfiguration);
    start(resource: string, name: string, service?: string): Span;
    startTopLevelSpan(resource: string, name: string, service?: string): Span | {
        end: () => typeof Span;
        setMeta: () => typeof Span;
        setTags: () => typeof Span;
        newChild: () => typeof Span;
        setError: (error?: Error) => typeof Span;
        removeShortSpans: () => typeof Span;
        setTraceId: () => typeof Span;
        readonly hasEnded: boolean;
    };
    startNestedSpan(resource: string, name: string, service?: string): Span | {
        end: () => typeof Span;
        setMeta: () => typeof Span;
        setTags: () => typeof Span;
        newChild: () => typeof Span;
        setError: (error?: Error) => typeof Span;
        removeShortSpans: () => typeof Span;
        setTraceId: () => typeof Span;
        readonly hasEnded: boolean;
    };
    getNestedSpan(): Span;
    startSpan(parent: Span, resource: string, name: string, service?: string): Span | {
        end: () => typeof Span;
        setMeta: () => typeof Span;
        setTags: () => typeof Span;
        newChild: () => typeof Span;
        setError: (error?: Error) => typeof Span;
        removeShortSpans: () => typeof Span;
        setTraceId: () => typeof Span;
        readonly hasEnded: boolean;
    };
    isInTrace(resource: string, name: string): boolean;
    get(): Span;
    end(): Span;
    endIf(resource: string, name: string): Span;
    recordTrace(trace: Span): void;
    sanitizeTags(tags: any): _.Dictionary<string>;
    getGlobalMetadata(): any;
    getGlobalTags(): any;
    getTraceId(): {};
}