interface OtelBrowserSinkProps {
    endpoint: string | undefined;
    /** Service name for OTLP resource. Default "frontend". */
    serviceName?: string;
    /** How long to wait before flushing spans (ms). Default 5000. */
    flushInterval?: number;
}
/**
 * OtelBrowserSink forwards event bus emissions as OTLP/HTTP trace spans.
 * Uses fetch to POST to the configured OpenTelemetry collector endpoint.
 */
export declare function OtelBrowserSink({ endpoint, serviceName, flushInterval, }: OtelBrowserSinkProps): null;
export {};
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