Propagating trace context between a backend and frontend typically involves ensuring that trace i...

export const OtelLive = Layer.unwrapEffect(
  Effect.gen(function* () {
    const config = yield* OtelConfig;

    const headers: Record<string, string> = {};

    if (config.dataset._tag === "Some") {
      headers["X-Axiom-Dataset"] = config.dataset.value;
    }

    if (config.token._tag === "Some") {
      headers.Authorization = `Bearer ${Redacted.value(config.token.value)}`;
    }

    const metricExporter = new OTLPMetricExporter({
      headers,
      url: `${config.baseUrl}/v1/metrics`,
    });

    const traceExporter = new OTLPTraceExporter({
      headers,
      url: `${config.baseUrl}/v1/traces`,
    });

    const logExporter = new OTLPLogExporter({
      headers,
      url: `${config.baseUrl}/v1/logs`,
    });

    return NodeSdk.layer(() => {
      return {
        instrumentations: [getNodeAutoInstrumentations()],
        logRecordProcessor: new BatchLogRecordProcessor(logExporter),
        metricReader: new PeriodicExportingMetricReader({
          exporter: metricExporter,
          exportIntervalMillis: 5000, // Export metrics every 5 seconds
        }),
        resource: {
          serviceName: "service-name",
        },
        spanProcessor: new BatchSpanProcessor(traceExporter),
      };
    });
  }),
);