chore(config-resolver): rename getSigningRegion to getResolvedSigningRegion

Author: trivikr

packages/config-resolver/src/regionInfo/getRegionInfo.ts

@@ -2,7 +2,7 @@ import { RegionInfo } from "@aws-sdk/types";
 
 import { getResolvedHostname } from "./getResolvedHostname";
 import { getResolvedPartition } from "./getResolvedPartition";
-import { getSigningRegion } from "./getSigningRegion";
+import { getResolvedSigningRegion } from "./getResolvedSigningRegion";
 import { PartitionHash } from "./PartitionHash";
 import { RegionHash } from "./RegionHash";
 
@@ -24,7 +24,11 @@ export const getRegionInfo = (
     regionHostname: regionHash[resolvedRegion]?.hostname,
     partitionHostname: partitionHash[partition]?.hostname,
   });
-  const signingRegion = getSigningRegion(region, { hostname, partition, regionHash, partitionHash });
+  const signingRegion = getResolvedSigningRegion(region, {
+    hostname,
+    resolvedRegionHash: regionHash[resolvedRegion],
+    regionRegex: partitionHash[partition].regionRegex,
+  });
 
   return {
     partition,

packages/config-resolver/src/regionInfo/getResolvedSigningRegion.ts

@@ -0,0 +1,22 @@
+import { isFipsRegion } from "./isFipsRegion";
+
+export interface GetResolvedSigningRegionOptions {
+  hostname: string;
+  resolvedRegionHash: { signingRegion?: string };
+  regionRegex: string;
+}
+
+export const getResolvedSigningRegion = (
+  region: string,
+  { hostname, resolvedRegionHash, regionRegex }: GetResolvedSigningRegionOptions
+) => {
+  if (resolvedRegionHash?.signingRegion) {
+    return resolvedRegionHash.signingRegion;
+  } else if (isFipsRegion(region)) {
+    const regionRegexJs = regionRegex.replace("\\\\", "\\").replace(/^\^/g, "").replace(/\$$/g, "");
+    const regionRegexmatchArray = hostname.match(regionRegexJs);
+    if (regionRegexmatchArray) {
+      return regionRegexmatchArray[0];
+    }
+  }
+};