require punycode conversion beforehand for admins

locales/en-US.yml

@@ -187,7 +187,7 @@ clearCachedFiles: "Clear cache"
 clearCachedFilesConfirm: "Are you sure that you want to delete all cached remote files?"
 blockedInstances: "Blocked Instances"
 blockedInstancesDescription: "List the hostnames of the instances that you want to\
-  \ block. Listed instances will no longer be able to communicate with this instance. You can use an asterisk (*) as a placeholder for zero or more character(s)."
+  \ block. Listed instances will no longer be able to communicate with this instance. Non-ASCII domain names must be encoded in punycode. You can use an asterisk (*) as a placeholder for zero or more character(s)."
 muteAndBlock: "Mutes and Blocks"
 mutedUsers: "Muted users"
 blockedUsers: "Blocked users"

packages/backend/src/misc/skipped-instances.ts

@@ -1,4 +1,3 @@
-import { toASCII } from 'punycode/';
 import { db } from '@/db/postgre.js';
 import { fetchMeta } from '@/misc/fetch-meta.js';
 import { Instance } from '@/models/entities/instance.js';
@@ -10,19 +9,17 @@ const deadThreshold = 7 * DAY;
 
 /**
  * Returns whether a given host matches a wildcard pattern.
- * @param host instance host
- * @param pattern wildcard pattern containing an instance host
+ * @param host punycoded instance host
+ * @param pattern wildcard pattern containing a punycoded instance host
  * @returns whether the post matches the pattern
  */
 function matchHost(host: Instance['host'], pattern: string): boolean {
 	// Escape all of the regex special characters. Pattern from:
 	// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#escaping
 	const escape = (str: string): string => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
-	const re = new RegExp('^' + pattern.split('*').map(toASCII).map(escape).join('.*') + '$');
+	const re = new RegExp('^' + pattern.split('*').map(escape).join('.*') + '$');
 	
-	// Encode the domain in punycode in case it uses non-ascii
-	const punycoded = toASCII(host);
-	return re.test(punycoded);
+	return re.test(host);
 }
 
 /**