θελω να φτιαξω ενα NPC που να πουλαει καποια Skill απο διαφορα sub και αυτα να κολλανε κανονικα για παντα. Μπορει να μου πει κανεις πως γινεται αυτο?

### Eclipse Workspace Patch 1.0
#P aCis_gameserver
Index: java/net/sf/l2j/gameserver/model/actor/instance/L2SkillSellerInstance.java
===================================================================
--- java/net/sf/l2j/gameserver/model/actor/instance/L2SkillSellerInstance.java	(revision 0)
+++ java/net/sf/l2j/gameserver/model/actor/instance/L2SkillSellerInstance.java	(working copy)
@@ -0,0 +1,64 @@
+/*
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ * 
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package net.sf.l2j.gameserver.model.actor.instance;
+
+import net.sf.l2j.gameserver.datatables.SkillTable;
+import net.sf.l2j.gameserver.model.L2Skill;
+import net.sf.l2j.gameserver.network.serverpackets.NpcHtmlMessage;
+import net.sf.l2j.gameserver.templates.chars.L2NpcTemplate;
+
+/**
+ * @author Devlin
+ *
+ */
+public class L2SkillSellerInstance extends L2NpcInstance
+{
+	public L2SkillSellerInstance(int objectId, L2NpcTemplate template)
+	{
+		super(objectId, template);
+	}
+	
+	@Override
+	public void onBypassFeedback(L2PcInstance player, String command)
+	{
+		if (command.equals("skill1"))
+		{
+			L2Skill skill1 = SkillTable.getInstance().getInfo(skillId, level);
+			player.addSkill(skill1, true);
+			player.destroyItem("Devlin.", 57, 1, null, false);
+		}
+	}
+	
+	@Override
+	public void showChatWindow(L2PcInstance player)
+	{
+		mainHtm(player);
+	}
+	
+	private void mainHtm(L2PcInstance player)
+	{
+		NpcHtmlMessage html = new NpcHtmlMessage(5);
+		StringBuilder sb = new StringBuilder("");
+		
+		sb.append("<html><title>Skill Seller</title>");
+		sb.append("<body><center>");
+		sb.append("Choose which skill you want to buy:<br>");
+		sb.append("<a action=\"bypass -h npc_" + getObjectId() + "_skill1\"><font color=\"LEVEL\">Dash</font></a><br>");
+		sb.append("</center></body></html>");
+		
+		html.setHtml(sb.toString());
+		player.sendPacket(html);
+	}
+}
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