import Constants from "expo-constants";import { makeRelayClientTracingLayer } from "@t3tools/shared/relayTracing"; import { hasTracingPublicConfig, resolveCloudPublicConfig } from "../cloud/publicConfig"; export interface TracingConfig {  readonly tracesUrl: string;  readonly tracesDataset: string;  readonly tracesToken: string;} export interface TracingResource {  readonly serviceVersion?: string;  readonly appVariant: string;} export function resolveTracingConfig(): TracingConfig | null {  const config = resolveCloudPublicConfig();  if (!hasTracingPublicConfig(config)) {    return null;  }  const { tracesUrl, tracesDataset, tracesToken } = config.observability;  return { tracesUrl, tracesDataset, tracesToken };} export function makeTracingLayer(config: TracingConfig | null, resource: TracingResource) {  return makeRelayClientTracingLayer(config, {    serviceName: "t3-mobile-relay-client",    serviceVersion: resource.serviceVersion,    runtime: "react-native",    client: `mobile-${resource.appVariant}`,  });} export const tracingLayer = makeTracingLayer(resolveTracingConfig(), {  serviceVersion: Constants.expoConfig?.version,  appVariant:    typeof Constants.expoConfig?.extra?.appVariant === "string"      ? Constants.expoConfig.extra.appVariant      : "unknown",});