import Span from './Span';
import Tracer from './Tracer';
import { SpanMeta, SpanTags, TracerConfiguration } from './interfaces';
export declare type AnnotatorFunction = (span: Span, ...args: any[]) => void;
export declare type ErrorAnnotatorFunction = (span: Span | typeof Span.NoOp, error: Error, ...args: any[]) => void;
export interface TraceFuncArgs {
    tracer: Tracer;
    context: any;
    name: string;
    resource: string;
    service?: string;
    annotator?: AnnotatorFunction;
}
export interface Context {
    _contextObject: true;
    tracer?: Tracer;
}
export declare type Metadata = SpanMeta;
export declare function traceFunc({tracer, context, service, resource, name, annotator}: TraceFuncArgs): void;
export declare function createTraceDecorator({service: defaultService, name: defaultName, tracerConfig, contextArgumentPosition, errorAnnotator}: {
    service: string;
    name?: string;
    tracerConfig: TracerConfiguration;
    contextArgumentPosition?: number;
    errorAnnotator?: ErrorAnnotatorFunction;
}): ({resource, service, name, annotator, metadata, tags, context}?: {
    resource?: string;
    service?: string;
    name?: string;
    annotator?: AnnotatorFunction;
    metadata?: SpanMeta;
    tags?: SpanTags;
    context?: Context;
}) => (_target: any, _key?: string, descriptor?: PropertyDescriptor) => any;
export declare function createTraceFunction({service: defaultService, name: defaultName, tracerConfig, contextArgumentPosition, errorAnnotator}: {
    service: string;
    name?: string;
    tracerConfig: TracerConfiguration;
    contextArgumentPosition?: number;
    errorAnnotator?: ErrorAnnotatorFunction;
}): ({resource, service, name, annotator, metadata, tags, context}?: {
    resource?: string;
    service?: string;
    name?: string;
    annotator?: AnnotatorFunction;
    metadata?: SpanMeta;
    tags?: SpanTags;
    context?: Context;
}) => (tracedFunction: Function) => (...args: any[]) => Promise<any>;
export declare function isPromiselike(maybePromise: any): boolean;