I'm pretty sure I selected all files

core/src/main/java/org/geysermc/floodgate/command/util/Permission.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Floodgate
+ */
+
+package org.geysermc.floodgate.command.util;
+
+import static org.geysermc.floodgate.command.util.PermissionDefault.OP;
+import static org.geysermc.floodgate.command.util.PermissionDefault.TRUE;
+
+public enum Permission {
+    COMMAND_MAIN("floodgate.command.floodgate", TRUE),
+    COMMAND_MAIN_FIREWALL(COMMAND_MAIN, "firewall", OP),
+    COMMAND_LINK("floodgate.command.linkaccount", TRUE),
+    COMMAND_UNLINK("floodgate.command.unlinkaccount", TRUE),
+    COMMAND_WHITELIST("floodgate.command.fwhitelist", OP),
+
+    NEWS_RECEIVE("floodgate.news.receive", OP);
+
+    private final String permission;
+    private final PermissionDefault defaultValue;
+
+    Permission(String permission, PermissionDefault defaultValue) {
+        this.permission = permission;
+        this.defaultValue = defaultValue;
+    }
+
+    Permission(Permission parent, String child, PermissionDefault defaultValue) {
+        this(parent.get() + "." + child, defaultValue);
+    }
+
+    public String get() {
+        return permission;
+    }
+
+    public PermissionDefault defaultValue() {
+        return defaultValue;
+    }
+}

core/src/main/java/org/geysermc/floodgate/command/util/PermissionDefault.java

@@ -23,23 +23,8 @@
  * @link https://github.com/GeyserMC/Floodgate
  */
 
-package org.geysermc.floodgate.util;
+package org.geysermc.floodgate.command.util;
 
-public enum Permissions {
+public enum PermissionDefault {
-    COMMAND_MAIN("floodgate.command.floodgate"),
+    TRUE, FALSE, OP, NOT_OP
-    COMMAND_LINK("floodgate.command.linkaccount"),
-    COMMAND_UNLINK("floodgate.command.unlinkaccount"),
-    COMMAND_WHITELIST("floodgate.command.fwhitelist"),
-
-    NEWS_RECEIVE("floodgate.news.receive");
-
-    private final String permission;
-
-    Permissions(String permission) {
-        this.permission = permission;
-    }
-
-    public String get() {
-        return permission;
-    }
 }