expose PermissionChecker and use this

api/src/main/java/com/velocitypowered/api/permission/PermissionSubject.java

@@ -22,7 +22,7 @@ public interface PermissionSubject {
    * @return whether or not the subject has the permission
    */
   default boolean hasPermission(String permission) {
-    return getPermissionValue(permission).toBooleanOrElse(false);
+    return this.getPermissionChecker().test(permission);
   }
 
   /**
@@ -31,14 +31,14 @@ public interface PermissionSubject {
    * @param permission the permission
    * @return the value the permission is set to
    */
-  TriState getPermissionValue(String permission);
+  default TriState getPermissionValue(String permission) {
+    return this.getPermissionChecker().value(permission);
+  }
 
   /**
    * Gets the permission checker for the subject.
    *
    * @return subject's permission checker
    */
-  default PermissionChecker getPermissionChecker() {
-    return this::getPermissionValue;
-  }
+  PermissionChecker getPermissionChecker();
 }

proxy/src/main/java/com/velocitypowered/proxy/connection/client/ConnectedPlayer.java

@@ -908,8 +908,8 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
   }
 
   @Override
-  public TriState getPermissionValue(String permission) {
-    return permissionChecker.value(permission);
+  public PermissionChecker getPermissionChecker() {
+    return this.permissionChecker;
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/console/VelocityConsole.java

@@ -75,8 +75,8 @@ public final class VelocityConsole extends SimpleTerminalConsole implements Cons
   }
 
   @Override
-  public @NonNull TriState getPermissionValue(@NonNull String permission) {
-    return this.permissionChecker.value(permission);
+  public PermissionChecker getPermissionChecker() {
+    return this.permissionChecker;
   }
 
   /**

proxy/src/test/java/com/velocitypowered/proxy/command/MockCommandSource.java

@@ -18,6 +18,7 @@
 package com.velocitypowered.proxy.command;
 
 import com.velocitypowered.api.command.CommandSource;
+import net.kyori.adventure.permission.PermissionChecker;
 import net.kyori.adventure.util.TriState;
 
 /**
@@ -28,7 +29,7 @@ public class MockCommandSource implements CommandSource {
   public static final CommandSource INSTANCE = new MockCommandSource();
 
   @Override
-  public TriState getPermissionValue(final String permission) {
-    return TriState.NOT_SET;
+  public PermissionChecker getPermissionChecker() {
+    return PermissionChecker.always(TriState.NOT_SET);
   }
 }