Function _buildSerializedMetric

packages/core/src/metrics/internal.ts:127–156

* Creates a serialized metric ready to be sent to Sentry.

(
  metric: Metric,
  client: Client,
  currentScope: Scope,
  scopeAttributes: RawAttributes<Record<string, unknown>> | undefined,
)

 * Creates a serialized metric ready to be sent to Sentry.
 */
function _buildSerializedMetric(
  metric: Metric,
  client: Client,
  currentScope: Scope,
  scopeAttributes: RawAttributes<Record<string, unknown>> | undefined,
): SerializedMetric {
  // Get trace context
  const [, traceContext] = _getTraceInfoFromScope(client, currentScope);
  const span = _getSpanForScope(currentScope);
  const traceId = span ? span.spanContext().traceId : traceContext?.trace_id;
  const spanId = span ? span.spanContext().spanId : undefined;

  const timestamp = timestampInSeconds();
  const sequenceAttr = getSequenceAttribute(timestamp);

  return {
    timestamp,
    trace_id: traceId ?? '',
    span_id: spanId,
    name: metric.name,
    type: metric.type,
    unit: metric.unit,
    value: metric.value,
    attributes: {
      ...serializeAttributes(scopeAttributes),
      ...serializeAttributes(metric.attributes, 'skip-undefined'),
      [sequenceAttr.key]: sequenceAttr.value,
    },
  };
}

/**
 * Captures a metric event and sends it to Sentry.