fix: detect registrar by nameservers

We detect cname flattening by registrar though when nameservers are
rerouted legal registar stays the same.

So instead we check if nameservers are cloudflare and can use cname flattening.

Author: TrySound

packages/domain/src/trpc/domain.ts

@@ -6,21 +6,10 @@ import { router, procedure } from "@webstudio-is/trpc-interface/index.server";
 import { Templates } from "@webstudio-is/sdk";
 import { db } from "../db";
 
-const registrars = {
-  cloudflare: {
-    rdap: "https://rdap.cloudflare.com/rdap/v1/domain/",
-    cnameFlattening: true,
-    alias: false,
-  },
-  /*
-  // ALIAS record is not support by cloudflare custom domains service 
-  namecheap: {
-    rdap: "https://rdap.namecheap.com/domain/",
-    cnameFlattening: false,
-    alias: true,
-  },
-  */
-} as const;
+const rdap = [
+  "https://rdap.cloudflare.com/rdap/v1/domain/",
+  "https://rdap.namecheap.com/domain/",
+];
 
 export const domainRouter = router({
   getEntriToken: procedure.query(async ({ ctx }) => {
@@ -44,13 +33,13 @@ export const domainRouter = router({
     .input(z.object({ domain: z.string() }))
     .query(async ({ input }) => {
       try {
-        for (const [name, meta] of Object.entries(registrars)) {
-          const response = await fetch(`${meta.rdap}${input.domain}`);
+        for (const rdapEndpoint of rdap) {
+          const response = await fetch(`${rdapEndpoint}${input.domain}`);
           if (response.ok) {
+            const data = await response.text();
             return {
-              name: name as keyof typeof registrars,
-              cnameFlattening: meta.cnameFlattening,
-              alias: meta.alias,
+              // detect by nameservers rather than registrar url
+              cnameFlattening: data.includes(".ns.cloudflare.com"),
             };
           }
         }
@@ -60,7 +49,6 @@ export const domainRouter = router({
       return {
         name: "other",
         cnameFlattening: false,
-        alias: false,
       };
     }),