Phishing domains trim www

Build/lib/normalize-domain.ts

@@ -24,6 +24,24 @@ export function fastNormalizeDomain(domain: string, parsed: TldTsParsed | null =
   return parsed.hostname;
 }
 
+export function fastNormalizeDomainIgnoreWww(domain: string, parsed: TldTsParsed | null = null) {
+  // We don't want tldts to call its own "extractHostname" on ip, bail out ip first.
+  // Now ip has been bailed out, we can safely set normalizeTldtsOpt.detectIp to false.
+  if (isProbablyIpv4(domain) || isProbablyIpv6(domain)) {
+    return null;
+  }
+
+  parsed ??= tldts.parse(domain, normalizeTldtsOpt);
+
+  // Private invalid domain (things like .tor, .dn42, etc)
+  if (!parsed.isIcann && !parsed.isPrivate) return null;
+
+  if (parsed.subdomain === 'www') {
+    return parsed.domain;
+  }
+  return parsed.hostname;
+}
+
 export function normalizeDomain(domain: string, parsed: TldTsParsed | null = null) {
   if (domain.length === 0) return null;