i want to Modification this bata npc code to make players pay for this Services
 
	 
 
	pay item id 57 
 
	 
 
	 
 
package l2f.gameserver.model.instances;
import java.sql.Connection;
import java.sql.PreparedStatement;
import l2f.commons.dbutils.DbUtils;
import l2f.gameserver.database.DatabaseFactory;
import l2f.gameserver.model.Player;
import l2f.gameserver.model.entity.olympiad.Olympiad;
import l2f.gameserver.network.serverpackets.L2GameServerPacket;
import l2f.gameserver.network.serverpackets.PledgeShowInfoUpdate;
import l2f.gameserver.network.serverpackets.SkillList;
import l2f.gameserver.network.serverpackets.UserInfo;
import l2f.gameserver.tables.SkillTable;
import l2f.gameserver.templates.npc.NpcTemplate;
import l2f.gameserver.utils.Log;
public final class BetaNPCInstance extends NpcInstance
{
	/**
	 * Author Ady
	 */
	private static final long serialVersionUID = 5938813598479742068L;
	public BetaNPCInstance(int objectId, NpcTemplate template)
	{
		super(objectId, template);
	}
	
	@Override
	public void onBypassFeedback(Player player, String command)
	{
		if (!canBypassCheck(player, this))
		{
			return;
		}
		if (command.equalsIgnoreCase("change_sex"))
		{
			Connection con = null;
			PreparedStatement offline = null;
			try
			{
				con = DatabaseFactory.getInstance().getConnection();
				offline = con.prepareStatement("UPDATE characters SET sex = ? WHERE obj_Id = ?");
				offline.setInt(1, player.getSex() == 1 ? 0 : 1);
				offline.setInt(2, player.getObjectId());
				offline.executeUpdate();
			}
			catch (Exception e)
			{
				e.printStackTrace();
				return;
			}
		finally
			{
				DbUtils.closeQuietly(con, offline);
			}
			
			player.changeSex();
			player.sendMessage("Your gender has been changed !!");
			Log.add(new StringBuilder().append("Character ").append(player).append("  changed sex to ").append(player.getSex() == 1 ? "male" : "female").toString(), "renames");
		}
		else if (command.equalsIgnoreCase("add_clan_reputation"))
		{
			if (player.getClan() != null)
			{
				player.getClan().incReputation(10000, false, "BetaNpc");
				player.getClan().broadcastToOnlineMembers(new L2GameServerPacket[]
				{
					new PledgeShowInfoUpdate(player.getClan())
				});
				player.sendMessage("Your clan received 10 000 clan reputation!");
			}
			else
			{
				player.sendMessage("You don't have clan to use this feature!");
			}
		}
		else if (command.equalsIgnoreCase("add_exp_sp"))
		{
			player.addExpAndSp(999999999L, 999999999L);
			player.addExpAndSp(999999999L, 999999999L);
			player.addExpAndSp(999999999L, 999999999L);
			player.addExpAndSp(999999999L, 999999999L);
			player.addExpAndSp(999999999L, 999999999L);
			player.addExpAndSp(999999999L, 999999999L);
			player.addExpAndSp(999999999L, 999999999L);
			player.addExpAndSp(999999999L, 999999999L);
		}
		else if (command.equalsIgnoreCase("add_fame"))
		{
			player.setFame(player.getFame() + 10000, "BetaNpc");
			player.sendPacket(new UserInfo(player));
			player.sendMessage("You received 10.000 fame points !");
		}
		else if (command.equalsIgnoreCase("give_noblesse"))
		{
			if (!player.isNoble())
			{
				Olympiad.addNoble(player.getPlayer());
				player.getPlayer().setNoble(true);
				player.getPlayer().updatePledgeClass();
				player.getPlayer().updateNobleSkills();
				player.getPlayer().sendPacket(new SkillList(player.getPlayer()));
				player.getPlayer().broadcastUserInfo(true);
				player.getInventory().addItem(7694, 1L, "nobleTiara");
				player.sendMessage("Congratulations! You gained noblesse rank.");
				player.broadcastUserInfo(true);
			}
			else if (player.isNoble())
			{
				player.sendMessage("You already have noblesse rank !");
			}
		}
		else if (command.equalsIgnoreCase("give_hero"))
		{
			if (!player.isHero())
			{
				player.setHero(true);
				player.updatePledgeClass();
				player.addSkill(SkillTable.getInstance().getInfo(395, 1));
				player.addSkill(SkillTable.getInstance().getInfo(396, 1));
				player.addSkill(SkillTable.getInstance().getInfo(1374, 1));
				player.addSkill(SkillTable.getInstance().getInfo(1375, 1));
				player.addSkill(SkillTable.getInstance().getInfo(1376, 1));
				player.sendPacket(new SkillList(player));
				player.getPlayer().broadcastUserInfo(true);
				player.sendMessage("Congratulations! You gained hero rank.");
				player.broadcastUserInfo(true);
			}
			else if (player.isNoble())
			{
				player.sendMessage("You already have hero rank !");
			}
		}
		else
		{
			super.onBypassFeedback(player, command);
		}
	}
	
	@Override
	public boolean isNpc()
	{
		return true;
	}
	
}