Multiple dashes in username is valid

src/app/utils/ChainValidation.js

 import tt from 'counterpart';
 import BadActorList from 'app/utils/BadActorList';
 import VerifiedExchangeList from 'app/utils/VerifiedExchangeList';
-import { PrivateKey, PublicKey } from '@hiveio/hive-js/lib/auth/ecc';
+import { PrivateKey } from '@hiveio/hive-js/lib/auth/ecc';
 
 export function validate_account_name(value) {
-    let i, label, len, length, ref;
+    let i, label, len;
 
     if (!value) {
         return tt('chainvalidation_js.account_name_should_not_be_empty');
     }
-    length = value.length;
+    const length = value.length;
     if (length < 3) {
         return tt('chainvalidation_js.account_name_should_be_longer');
     }
@@ -19,8 +19,8 @@ export function validate_account_name(value) {
     if (BadActorList.includes(value)) {
         return tt('chainvalidation_js.badactor');
     }
-    ref = value.split('.');
-    for (i = 0, len = ref.length; i < len; i++) {
+    const ref = value.split('.');
+    for (i = 0, len = ref.length; i < len; i += 1) {
         label = ref[i];
         if (!/^[a-z]/.test(label)) {
             return tt(
@@ -32,17 +32,12 @@ export function validate_account_name(value) {
                 'chainvalidation_js.each_account_segment_should_have_only_letters_digits_or_dashes'
             );
         }
-        if (/--/.test(label)) {
-            return tt(
-                'chainvalidation_js.each_account_segment_should_have_only_one_dash_in_a_row'
-            );
-        }
         if (!/[a-z0-9]$/.test(label)) {
             return tt(
                 'chainvalidation_js.each_account_segment_should_end_with_a_letter_or_digit'
             );
         }
-        if (!(label.length >= 3)) {
+        if (label.length < 3) {
             return tt(
                 'chainvalidation_js.each_account_segment_should_be_longer'
             );
@@ -67,7 +62,7 @@ export function validate_account_name_with_memo(name, memo) {
 }
 
 export function validate_memo_field(value, username, memokey) {
-    value = value.split(' ').filter((v) => v != '');
+    value = value.split(' ').filter((v) => v !== '');
     for (const w in value) {
         // Only perform key tests if it might be a key, i.e. it is a long string.
         if (value[w].length >= 39) {
@@ -77,12 +72,7 @@ export function validate_memo_field(value, username, memokey) {
             if (PrivateKey.isWif(value[w])) {
                 return tt('chainvalidation_js.memo_is_privatekey');
             }
-            if (
-                memokey ===
-                PrivateKey.fromSeed(username + 'memo' + value[w])
-                    .toPublicKey()
-                    .toString()
-            ) {
+            if (memokey === PrivateKey.fromSeed(username + 'memo' + value[w]).toPublicKey().toString()) {
                 return tt('chainvalidation_js.memo_is_password');
             }
         }