export declare const SpanStatus: {
    readonly ok: 1;
    readonly error: 2;
};
export interface SpanOptions {
    name: string;
    op?: string;
    attributes?: Record<string, string | number | boolean | undefined>;
    newTrace?: boolean;
}
export interface Span {
    setAttribute(key: string, value: string | number | boolean): void;
    setStatus(status: {
        code: number;
        message?: string;
    }): void;
}
export interface Tracer {
    startSpan<T>(options: SpanOptions, run: (span: Span) => Promise<T>): Promise<T>;
}
export declare const noopTracer: Tracer;