Function spanToTraceContext

packages/core/src/utils/spanUtils.ts:66–81

(span: Span)

 * Convert a span to a trace context, which can be sent as the `trace` context in a non-transaction event.
 */
export function spanToTraceContext(span: Span): TraceContext {
  const { spanId, traceId: trace_id, isRemote } = span.spanContext();

  // If the span is remote, we use a random/virtual span as span_id to the trace context,
  // and the remote span as parent_span_id
  const parent_span_id = isRemote ? spanId : spanToJSON(span).parent_span_id;
  const scope = getCapturedScopesOnSpan(span).scope;

  const span_id = isRemote ? scope?.getPropagationContext().propagationSpanId || generateSpanId() : spanId;

  return {
    parent_span_id,
    span_id,
    trace_id,
  };
}

/**
 * Convert a Span to a Sentry trace header.