import { type Span, type Tracer } from '@opentelemetry/api';
export declare function setAttr(span: Span, key: string, value: unknown): void;
export declare function traceChannel<T>(channelName: string, tracer: Tracer, { startUpdate, beforeEndUpdate, errorUpdate, skip, }: {
    startUpdate?: (span: Span, data: T) => void;
    beforeEndUpdate?: (span: Span, data: T) => void;
    errorUpdate?: (span: Span, data: T) => void;
    skip?: (data: T) => boolean;
}): void;