import { GenericObject } from '../../typings';
import Star from '../star';
import { LoggerInstance } from '../../typings/logger';
import RateLimiter from './rate-limiter';
import { TraceExporter, TracerOptions } from '../../typings/tracing';
import Span from './span';
export default class Tracer {
    star: Star;
    logger: LoggerInstance;
    options: GenericObject;
    sampleCounter: number;
    rateLimiter: RateLimiter | null;
    defaultTags: GenericObject | Function | null;
    exporter: TraceExporter[] | null;
    constructor(star: Star, options: TracerOptions | boolean);
    init(): void;
    stop(): Promise<any>;
    isEnabled(): any;
    shouldSample(span: Span): boolean;
    startSpan(name: string, options?: GenericObject): Span;
    spanStarted(span: Span): void;
    spanFinished(span: Span): void;
    invokeExporter(method: string, args: Array<any>): void;
    getCurrentTraceID(): null;
    getActiveSpanID(): null;
}