feat!: add a custom base url for sidecase resolves

packages/sdk/src/FlagResolverClient.ts

@@ -16,7 +16,10 @@ import { SimpleFetch } from './types';
 const FLAG_PREFIX = 'flags/';
 
 export class ResolveError extends Error {
-  constructor(public readonly code: FlagEvaluation.ErrorCode, message: string) {
+  constructor(
+    public readonly code: FlagEvaluation.ErrorCode,
+    message: string,
+  ) {
     super(message);
   }
 }
@@ -84,6 +87,7 @@ export type FlagResolverClientOptions = {
   resolveTimeout: number;
   environment: 'client' | 'backend';
   region?: 'eu' | 'us';
+  APIResolveBaseUrl?: string;
 };
 
 export class FetchingFlagResolverClient implements FlagResolverClient {
@@ -103,13 +107,17 @@ export class FetchingFlagResolverClient implements FlagResolverClient {
     // todo refactor to move out environment
     environment,
     region,
+    APIResolveBaseUrl,
   }: FlagResolverClientOptions) {
     // TODO think about both resolve and apply request logic for backends
     this.fetchImplementation = environment === 'backend' ? fetchImplementation : withRequestLogic(fetchImplementation);
     this.clientSecret = clientSecret;
     this.sdk = sdk;
     this.applyTimeout = applyTimeout;
-    this.baseUrl = region ? `https://resolver.${region}.confidence.dev/v1` : 'https://resolver.confidence.dev/v1';
+    this.baseUrl =
+      APIResolveBaseUrl || region
+        ? `https://resolver.${region}.confidence.dev/v1`
+        : 'https://resolver.confidence.dev/v1';
     this.resolveTimeout = resolveTimeout;
   }