Created the exitoffer command

src/me/EtienneDx/RealEstate/BoughtTransaction.java

@@ -0,0 +1,46 @@
+package me.EtienneDx.RealEstate;
+
+import java.util.Map;
+import java.util.UUID;
+
+import org.bukkit.Location;
+import org.bukkit.entity.Player;
+
+import me.ryanhamshire.GriefPrevention.Claim;
+
+public abstract class BoughtTransaction extends ClaimTransaction
+{
+	UUID buyer = null;
+	ExitOffer exitOffer = null;
+	
+	public BoughtTransaction(Map<String, Object> map)
+	{
+		super(map);
+		if(map.get("buyer") != null)
+			buyer = UUID.fromString((String)map.get("buyer"));
+		if(map.get("exitOffer") != null)
+			exitOffer = (ExitOffer) map.get("exitOffer");
+	}
+	
+	public BoughtTransaction(Claim claim, Player player, double price, Location sign)
+	{
+		super(claim, player, price, sign);
+	}
+
+	@Override
+	public Map<String, Object> serialize()
+	{
+		Map<String, Object> map = super.serialize();
+		if(buyer != null)
+			map.put("buyer", buyer.toString());
+		if(exitOffer != null)
+			map.put("exitOffer", exitOffer);
+		
+		return map;
+	}
+	
+	public UUID getBuyer()
+	{
+		return buyer;
+	}
+}

src/me/EtienneDx/RealEstate/ClaimLease.java

@@ -7,8 +7,6 @@ import java.time.LocalTime;
 import java.time.Period;
 import java.time.format.DateTimeFormatter;
 import java.util.Map;
-import java.util.UUID;
-
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.OfflinePlayer;
@@ -20,12 +18,11 @@ import me.ryanhamshire.GriefPrevention.ClaimPermission;
 import me.ryanhamshire.GriefPrevention.GriefPrevention;
 import net.md_5.bungee.api.ChatColor;
 
-public class ClaimLease extends ClaimTransaction
+public class ClaimLease extends BoughtTransaction
 {
 	LocalDateTime lastPayment = null;
 	int frequency;
 	int paymentsLeft;
-	UUID buyer = null;
 	
 	public ClaimLease(Map<String, Object> map)
 	{
@@ -34,8 +31,6 @@ public class ClaimLease extends ClaimTransaction
 			lastPayment = LocalDateTime.parse((String) map.get("lastPayment"), DateTimeFormatter.ISO_DATE_TIME);
 		frequency = (int)map.get("frequency");
 		paymentsLeft = (int)map.get("paymentsLeft");
-		if(map.get("buyer") != null)
-			buyer = UUID.fromString((String)map.get("buyer"));
 	}
 	
 	public ClaimLease(Claim claim, Player player, double price, Location sign, int frequency, int paymentsLeft)
@@ -53,8 +48,6 @@ public class ClaimLease extends ClaimTransaction
 			map.put("lastPayment", lastPayment.format(DateTimeFormatter.ISO_DATE_TIME));
 		map.put("frequency", frequency);
 		map.put("paymentsLeft", paymentsLeft);
-		if(buyer != null)
-			map.put("buyer", buyer.toString());
 		
 		return map;
 	}
@@ -74,6 +67,10 @@ public class ClaimLease extends ClaimTransaction
 				s.setLine(3, Utils.getTime(frequency, null, false));
 				s.update(true);
 			}
+			else
+			{
+				RealEstate.transactionsStore.cancelTransaction(this);
+			}
 		}
 		else
 		{

src/me/EtienneDx/RealEstate/ClaimRent.java

@@ -7,8 +7,6 @@ import java.time.LocalTime;
 import java.time.Period;
 import java.time.format.DateTimeFormatter;
 import java.util.Map;
-import java.util.UUID;
-
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.OfflinePlayer;
@@ -20,11 +18,10 @@ import me.ryanhamshire.GriefPrevention.ClaimPermission;
 import me.ryanhamshire.GriefPrevention.GriefPrevention;
 import net.md_5.bungee.api.ChatColor;
 
-public class ClaimRent extends ClaimTransaction
+public class ClaimRent extends BoughtTransaction
 {
 	LocalDateTime startDate = null;
 	int duration;
-	UUID rentedBy = null;
 	boolean autoRenew = false;
 	
 	public ClaimRent(Map<String, Object> map)
@@ -33,8 +30,6 @@ public class ClaimRent extends ClaimTransaction
 		if(map.get("startDate") != null)
 			startDate = LocalDateTime.parse((String) map.get("startDate"), DateTimeFormatter.ISO_DATE_TIME);
 		duration = (int)map.get("duration");
-		if(map.get("rentedBy") != null)
-			rentedBy = UUID.fromString((String)map.get("rentedBy"));
 		autoRenew = (boolean) map.get("autoRenew");
 	}
 	
@@ -51,8 +46,6 @@ public class ClaimRent extends ClaimTransaction
 		if(startDate != null)
 			map.put("startDate", startDate.format(DateTimeFormatter.ISO_DATE_TIME));
 		map.put("duration", duration);
-		if(rentedBy != null)
-			map.put("rentedBy", rentedBy.toString());
 		map.put("autoRenew",  autoRenew);
 		
 		return map;
@@ -64,7 +57,7 @@ public class ClaimRent extends ClaimTransaction
 		if(sign.getBlock().getState() instanceof Sign)
 		{
 			Sign s = (Sign) sign.getBlock().getState();
-			if(rentedBy == null)
+			if(buyer == null)
 			{
 				s.setLine(0, RealEstate.instance.dataStore.cfgSignsHeader);
 				s.setLine(1, ChatColor.DARK_GREEN + RealEstate.instance.dataStore.cfgReplaceRent);
@@ -94,7 +87,7 @@ public class ClaimRent extends ClaimTransaction
 				else
 				{
 					s.setLine(0, RealEstate.instance.dataStore.cfgSignsHeader);
-					s.setLine(1, ("Rented by " + Bukkit.getOfflinePlayer(rentedBy).getName()).substring(0, 16));
+					s.setLine(1, ("Rented by " + Bukkit.getOfflinePlayer(buyer).getName()).substring(0, 16));
 					s.setLine(2, "Time remaining : ");
 					
 					int daysLeft = duration - days - 1;// we need to remove the current day
@@ -106,7 +99,7 @@ public class ClaimRent extends ClaimTransaction
 				
 			}
 		}
-		else
+		else if(buyer == null)// if no one is renting it, we can delete it (no sign indicating it's rentable)
 		{
 			RealEstate.transactionsStore.cancelTransaction(this);
 		}
@@ -115,34 +108,34 @@ public class ClaimRent extends ClaimTransaction
 	private void unRent(boolean msgBuyer)
 	{
 		Claim claim = GriefPrevention.instance.dataStore.getClaimAt(sign, false, null);
-		claim.dropPermission(rentedBy.toString());
+		claim.dropPermission(buyer.toString());
-		if(msgBuyer && Bukkit.getOfflinePlayer(rentedBy).isOnline() && RealEstate.instance.dataStore.cfgMessageBuyer)
+		if(msgBuyer && Bukkit.getOfflinePlayer(buyer).isOnline() && RealEstate.instance.dataStore.cfgMessageBuyer)
 		{
-			Bukkit.getPlayer(rentedBy).sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.AQUA + 
+			Bukkit.getPlayer(buyer).sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.AQUA + 
 					"The rent for the " + (claim.parent == null ? "claim" : "subclaim") + " at " + ChatColor.BLUE + "[" + 
 					sign.getWorld().getName() + ", X: " + sign.getBlockX() + ", Y: " + 
 					sign.getBlockY() + ", Z: " + sign.getBlockZ() + "]" + ChatColor.AQUA + " is now over, your access has been revoked.");
 		}
-		rentedBy = null;
+		buyer = null;
 		RealEstate.transactionsStore.saveData();
 		update();
 	}
 
 	private void payRent()
 	{
-		if(rentedBy == null) return;
+		if(buyer == null) return;
 
-		OfflinePlayer buyer = Bukkit.getOfflinePlayer(rentedBy);
+		OfflinePlayer buyerPlayer = Bukkit.getOfflinePlayer(this.buyer);
 		OfflinePlayer seller = Bukkit.getOfflinePlayer(owner);
 		
 		String claimType = GriefPrevention.instance.dataStore.getClaimAt(sign, false, null).parent == null ? "claim" : "subclaim";
 		
-		if(Utils.makePayment(owner, rentedBy, price, false, false))
+		if(Utils.makePayment(owner, this.buyer, price, false, false))
 		{
 			startDate = LocalDateTime.now();
-			if(buyer.isOnline() && RealEstate.instance.dataStore.cfgMessageBuyer)
+			if(buyerPlayer.isOnline() && RealEstate.instance.dataStore.cfgMessageBuyer)
 			{
-				((Player)buyer).sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.AQUA + 
+				((Player)buyerPlayer).sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.AQUA + 
 						"Paid rent for the " + claimType + " at " + ChatColor.BLUE + "[" + sign.getWorld().getName() + ", X: " + sign.getBlockX() + 
 						", Y: " + sign.getBlockY() + ", Z: " + sign.getBlockZ() + "]" + 
 						ChatColor.AQUA + "for the price of " + ChatColor.GREEN + price + " " + RealEstate.econ.currencyNamePlural());
@@ -150,7 +143,7 @@ public class ClaimRent extends ClaimTransaction
 			
 			if(seller.isOnline() && RealEstate.instance.dataStore.cfgMessageOwner)
 			{
-				((Player)seller).sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.AQUA + buyer.getName() + 
+				((Player)seller).sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.AQUA + buyerPlayer.getName() + 
 						" has paid rent for the " + claimType + " at " + ChatColor.BLUE + "[" + 
 						sign.getWorld().getName() + ", X: " + sign.getBlockX() + ", Y: " + 
 						sign.getBlockY() + ", Z: " + sign.getBlockZ() + "]" + 
@@ -159,9 +152,9 @@ public class ClaimRent extends ClaimTransaction
 		}
 		else
 		{
-			if(buyer.isOnline() && RealEstate.instance.dataStore.cfgMessageBuyer)
+			if(buyerPlayer.isOnline() && RealEstate.instance.dataStore.cfgMessageBuyer)
 			{
-				((Player)buyer).sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + 
+				((Player)buyerPlayer).sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + 
 						"Couldn't pay the rent for the " + claimType + " at " + ChatColor.BLUE + "[" + sign.getWorld().getName() + ", X: " + 
 						sign.getBlockX() + ", Y: " + 
 						sign.getBlockY() + ", Z: " + sign.getBlockZ() + "]" + ChatColor.RED + ", your access has been revoked.");
@@ -175,7 +168,7 @@ public class ClaimRent extends ClaimTransaction
 	@Override
 	public boolean tryCancelTransaction(Player p)
 	{
-		if(rentedBy != null)
+		if(buyer != null)
 		{
 			Claim claim = GriefPrevention.instance.dataStore.getClaimAt(sign, false, null);
 			if(p != null)
@@ -220,13 +213,13 @@ public class ClaimRent extends ClaimTransaction
             		claimType + "s!");
             return;
 		}
-		if(player.getUniqueId().equals(rentedBy))
+		if(player.getUniqueId().equals(buyer))
 		{
             player.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + "You are already renting this " + 
             		claimType + "!");
             return;
 		}
-		if(rentedBy != null)
+		if(buyer != null)
 		{
             player.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + "Someone already rents this " + 
             		claimType + "!");
@@ -235,10 +228,10 @@ public class ClaimRent extends ClaimTransaction
 		
 		if(Utils.makePayment(owner, player.getUniqueId(), price, false, true))// if payment succeed
 		{
-			rentedBy = player.getUniqueId();
+			buyer = player.getUniqueId();
 			startDate = LocalDateTime.now();
 			autoRenew = false;
-			claim.setPermission(rentedBy.toString(), ClaimPermission.Build);
+			claim.setPermission(buyer.toString(), ClaimPermission.Build);
 			update();
 			RealEstate.transactionsStore.saveData();
 			
@@ -278,15 +271,12 @@ public class ClaimRent extends ClaimTransaction
 			String claimType = claim.parent == null ? "claim" : "subclaim";
 			msg = ChatColor.BLUE + "-----= " + ChatColor.WHITE + "[" + ChatColor.GOLD + "RealEstate Rent Info" + ChatColor.WHITE + "]" + 
 					ChatColor.BLUE + " =-----\n";
-			if(rentedBy == null)
+			if(buyer == null)
 			{
 				msg += ChatColor.AQUA + "This " + claimType + " is for rent for " +
 						ChatColor.GREEN + price + " " + RealEstate.econ.currencyNamePlural() + ChatColor.AQUA + " for a duration of " + 
 						ChatColor.GREEN + Utils.getTime(duration, null, true) + "\n";
-				if(rentedBy.equals(player.getUniqueId()) && RealEstate.instance.dataStore.cfgEnableAutoRenew)
+				
-				{
-					msg += ChatColor.AQUA + "Automatic renew is currently " + ChatColor.LIGHT_PURPLE + (autoRenew ? "enable" : "disable") + "\n";
-				}
 				if(claimType.equalsIgnoreCase("claim"))
 				{
 					msg += ChatColor.AQUA + "The current owner is: " + ChatColor.GREEN + claim.getOwnerName();
@@ -310,9 +300,13 @@ public class ClaimRent extends ClaimTransaction
 				Duration timeRemaining = Duration.ofHours(24).minus(hours);
 				
 				msg += ChatColor.AQUA + "This " + claimType + " is currently rented by " + 
-						ChatColor.GREEN + Bukkit.getOfflinePlayer(rentedBy).getName() + ChatColor.AQUA + " for " +
+						ChatColor.GREEN + Bukkit.getOfflinePlayer(buyer).getName() + ChatColor.AQUA + " for " +
 						ChatColor.GREEN + price + " " + RealEstate.econ.currencyNamePlural() + ChatColor.AQUA + " for another " + 
 						ChatColor.GREEN + Utils.getTime(daysLeft, timeRemaining, true) + "\n";
+				if((owner.equals(player.getUniqueId()) || buyer.equals(player.getUniqueId())) && RealEstate.instance.dataStore.cfgEnableAutoRenew)
+				{
+					msg += ChatColor.AQUA + "Automatic renew is currently " + ChatColor.LIGHT_PURPLE + (autoRenew ? "enable" : "disable") + "\n";
+				}
 				if(claimType.equalsIgnoreCase("claim"))
 				{
 					msg += ChatColor.AQUA + "The current owner is: " + ChatColor.GREEN + claim.getOwnerName();

src/me/EtienneDx/RealEstate/DataStore.java

@@ -78,7 +78,7 @@ public class DataStore
     	this.cfgSignsHeader = config.getString("RealEstate.Keywords.SignsHeader", ChatColor.GOLD + "[RealEstate]");
     	//this.cfgSigns = getConfigList(config, "RealEstate.Keywords.Signs", Arrays.asList("[re]", "[realestate]"));
 
-    	this.cfgSellKeywords = getConfigList(config, "RealEstate.Keywords.Sell", Arrays.asList("[sell]", "[sellclaim]", "[sc]", "[re]", "[realestate]"));
+    	this.cfgSellKeywords = getConfigList(config, "RealEstate.Keywords.Sell", Arrays.asList("[sell]", "[sell claim]", "[sc]", "[re]", "[realestate]"));
     	this.cfgRentKeywords = getConfigList(config, "RealEstate.Keywords.Rent", Arrays.asList("[rent]", "[rent claim]", "[rc]"));
     	this.cfgLeaseKeywords = getConfigList(config, "RealEstate.Keywords.Lease", Arrays.asList("[lease]", "[lease claim]", "[lc]"));
 

src/me/EtienneDx/RealEstate/ExitOffer.java

@@ -0,0 +1,34 @@
+package me.EtienneDx.RealEstate;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+import org.bukkit.configuration.serialization.ConfigurationSerializable;
+
+public class ExitOffer implements ConfigurationSerializable
+{
+	UUID offerBy;
+	double price;
+	
+	public ExitOffer(UUID offerBy, double price)
+	{
+		this.offerBy = offerBy;
+		this.price = price;
+	}
+	
+	public ExitOffer(Map<String, Object> map)
+	{
+		offerBy = UUID.fromString((String)map.get("offerBy"));
+		price = (double)map.get("price");
+	}
+	
+	@Override
+	public Map<String, Object> serialize()
+	{
+		HashMap<String, Object> map = new HashMap<>();
+		map.put("offerBy", offerBy.toString());
+		map.put("price", price);
+		return map;
+	}
+}

src/me/EtienneDx/RealEstate/REListener.java

@@ -1,8 +1,10 @@
 package me.EtienneDx.RealEstate;
 
+import java.util.Arrays;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.Location;
 import org.bukkit.block.Sign;
@@ -331,10 +333,12 @@ public class REListener implements Listener, CommandExecutor
 	@EventHandler
 	public void onPlayerInteract(PlayerInteractEvent event)
 	{
-		if(event.getHand().equals(EquipmentSlot.HAND) && event.getAction().equals(Action.RIGHT_CLICK_BLOCK) && event.getClickedBlock().getState() instanceof Sign)
+		if(event.getHand().equals(EquipmentSlot.HAND) && event.getAction().equals(Action.RIGHT_CLICK_BLOCK) && 
+				event.getClickedBlock().getState() instanceof Sign)
 		{
 			Sign sign = (Sign)event.getClickedBlock().getState();
-			if(ChatColor.stripColor(sign.getLine(0)).equalsIgnoreCase(ChatColor.stripColor(RealEstate.instance.dataStore.cfgSignsHeader)))// it is a real estate sign
+			// it is a real estate sign
+			if(ChatColor.stripColor(sign.getLine(0)).equalsIgnoreCase(ChatColor.stripColor(RealEstate.instance.dataStore.cfgSignsHeader)))
 			{
 				Player player = event.getPlayer();
 				Claim claim = GriefPrevention.instance.dataStore.getClaimAt(event.getClickedBlock().getLocation(), false, null);
@@ -421,7 +425,10 @@ public class REListener implements Listener, CommandExecutor
 					return true;
 				}
 				if(!(sender instanceof Player))
-					return false;
+				{
+					sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + "Only players can use this command!");
+					return true;
+				}
 				Claim claim = GriefPrevention.instance.dataStore.getClaimAt(((Player)sender).getLocation(), false, null);
 				if(claim == null)
 				{
@@ -436,7 +443,7 @@ public class REListener implements Listener, CommandExecutor
 					return true;
 				}
 				ClaimRent cr = (ClaimRent)tr;
-				if(!((Player)sender).getUniqueId().equals(cr.rentedBy) && !((Player)sender).getUniqueId().equals(cr.owner))
+				if(!((Player)sender).getUniqueId().equals(cr.buyer) && !((Player)sender).getUniqueId().equals(cr.owner))
 				{
 					sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + 
 							"You are not the person renting this " + claimType + "!");
@@ -450,7 +457,7 @@ public class REListener implements Listener, CommandExecutor
 				}
 				else if(args.length > 2 || (!args[1].equalsIgnoreCase("enable") && !args[1].equalsIgnoreCase("disable")))
 				{
-					sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + "Usage : /" + label + " renewRent [enable|disable]!");
+					sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + "Usage : /" + label + " renewrent [enable|disable]!");
 					return true;
 				}
 				cr.autoRenew = args[1].equalsIgnoreCase("enable");
@@ -459,10 +466,159 @@ public class REListener implements Listener, CommandExecutor
 						ChatColor.GREEN + (cr.autoRenew ? "enabled" : "disabled") + ChatColor.AQUA + " for this " + claimType + "!");
 				return true;
 			}
+			else if(args[0].equalsIgnoreCase("exitoffer"))
+			{
+				if(!(sender instanceof Player))
+				{
+					sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + "Only players can use this command!");
+					return true;
+				}
+				Claim claim = GriefPrevention.instance.dataStore.getClaimAt(((Player)sender).getLocation(), false, null);
+				if(claim == null)
+				{
+					sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + "You are not standing inside of a claim!");
+					return true;
+				}
+				String claimType = claim.parent == null ? "claim" : "subclaim";
+				Transaction tr = RealEstate.transactionsStore.getTransaction(claim);
+				if(!(tr instanceof BoughtTransaction))
+				{
+					sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + "This claim is not for rent or lease!");
+					return true;
+				}
+				BoughtTransaction bt = (BoughtTransaction)tr;
+				if(!((Player)sender).getUniqueId().equals(bt.getBuyer()) && !((Player)sender).getUniqueId().equals(tr.getOwner()))
+				{
+					sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + 
+							"You are not the person renting or leasing this " + claimType + "!");
+					return true;
+				}
+				if(args.length == 1 || args[1].equalsIgnoreCase("info"))
+				{
+					if(bt.exitOffer == null)
+					{
+						sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.AQUA + "There is currently no exit offer for this claim!");
+					}
+					else if(bt.exitOffer.offerBy.equals(((Player)sender).getUniqueId()))
+					{
+						String msg = RealEstate.instance.dataStore.chatPrefix + ChatColor.AQUA + "You offered to exit the contract for " + 
+								ChatColor.GREEN + bt.exitOffer.price + " " + RealEstate.econ.currencyNamePlural() + ChatColor.AQUA + 
+								", but your offer hasn't been accepted or denied yet...\n";
+						msg += ChatColor.AQUA + "To cancel your offer, just type " + ChatColor.LIGHT_PURPLE + "/" + label + " exitoffer cancel";
+						sender.sendMessage(msg);
+					}
+					else// it is the other person
+					{
+						String msg = RealEstate.instance.dataStore.chatPrefix + ChatColor.GREEN + Bukkit.getOfflinePlayer(bt.exitOffer.offerBy).getName() +
+								ChatColor.AQUA + " offered to exit the contract for " + 
+								ChatColor.GREEN + bt.exitOffer.price + " " + RealEstate.econ.currencyNamePlural() + "\n";
+						msg += ChatColor.AQUA + "To accept the offer, just type " + ChatColor.LIGHT_PURPLE + "/" + label + " exitoffer accept\n";
+						msg += ChatColor.AQUA + "To refuse the offer, just type " + ChatColor.LIGHT_PURPLE + "/" + label + " exitoffer refuse\n";
+						sender.sendMessage(msg);
+					}
+					return true;
+				}
+				else if(!Arrays.asList("cancel", "accept", "refuse", "create").contains(args[1].toLowerCase()))
+				{
+					sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + "Usage : /" + label + 
+							" exitoffer [cancel|accept|refuse|info|create]");
+					return true;
+				}
+				if(args[1].equalsIgnoreCase("create"))
+				{
+					if(bt.exitOffer != null)
+					{
+						sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + 
+								"There is already an exit proposition for this transaction!");
+						return true;
+					}
+					if(args.length != 3)
+					{
+
+						sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + 
+								"Usage : /" + label + " exitoffer create <price>");
+						return true;
+					}
+					double price;
+					try
+					{
+						price = Double.parseDouble(args[2]);
+					}
+					catch(Exception e)
+					{
+						sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + 
+								"The price isn't a valid number!");
+						return true;
+					}
+					if(price < 0)
+					{
+						sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + 
+								"The price must be a positive number!");
+						return true;
+					}
+					bt.exitOffer = new ExitOffer(((Player)sender).getUniqueId(), price);
+
+					sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.AQUA + 
+							"The proposition has been successfully created!");
+				}
+				else
+				{
+					if(bt.exitOffer == null)
+					{
+						sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + 
+								"There has been no exit propositions for this transaction!");
+						return true;
+					}
+					if(args[1].equalsIgnoreCase("cancel"))
+					{
+						if(bt.exitOffer.offerBy.equals(((Player)sender).getUniqueId()))
+						{
+							bt.exitOffer = null;
+							sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.AQUA + 
+									"This exit offer has been cancelled");
+						}
+						else
+						{
+							sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + 
+									"Only the player who created this exit proposition may cancel it");
+						}
+					}
+					else if(args[1].equalsIgnoreCase("accept") || args[1].equalsIgnoreCase("refuse"))
+					{
+						if(bt.exitOffer.offerBy.equals(((Player)sender).getUniqueId()))
+						{
+							sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.RED + 
+									"You can't accept or refuse an offer you made!");
+						}
+						else
+						{
+							if(args[1].equalsIgnoreCase("refuse"))// easy part
+							{
+								bt.exitOffer = null;
+								sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.AQUA + 
+										"This exit offer has been refused");
+							}
+							else if(Utils.makePayment(((Player)sender).getUniqueId(), bt.exitOffer.offerBy, bt.exitOffer.price, true, false))
+							{
+								bt.exitOffer = null;
+								claim.dropPermission(bt.buyer.toString());
+								bt.buyer = null;
+								bt.update();// eventual cancel is contained in here
+								sender.sendMessage(RealEstate.instance.dataStore.chatPrefix + ChatColor.AQUA + 
+										"This exit offer has been accepted, the " + claimType + " is no longer rented or leased!");
+							}
+							// in case of payment failure, a msg has been sent by the utils function
+						}
+					}
+				}
+				
+				RealEstate.transactionsStore.saveData();
+				return true;
+			}
 		}
 		else// plugin infos
 		{
-			String msg = ChatColor.BLUE + "---------= [" + ChatColor.GOLD + RealEstate.instance.getDescription().getName() + ChatColor.BLUE + "] =---------\n";
+			String msg = ChatColor.BLUE + "-------= [" + ChatColor.GOLD + RealEstate.instance.getDescription().getName() + ChatColor.BLUE + "] =-------\n";
 
 			msg += ChatColor.AQUA + "/" + label + ChatColor.LIGHT_PURPLE + " info" + ChatColor.AQUA + 
 					" : Gets the informations about the transactions going on in the claim you're standing in.\n";

src/me/EtienneDx/RealEstate/RealEstate.java

@@ -64,6 +64,7 @@ public class RealEstate extends JavaPlugin
         ConfigurationSerialization.registerClass(ClaimSell.class);
         ConfigurationSerialization.registerClass(ClaimRent.class);
         ConfigurationSerialization.registerClass(ClaimLease.class);
+        ConfigurationSerialization.registerClass(ExitOffer.class);
         
         RealEstate.transactionsStore = new TransactionsStore();
         

src/me/EtienneDx/RealEstate/TransactionsStore.java

@@ -147,7 +147,7 @@ public class TransactionsStore
 	
 	public boolean canCancelTransaction(Transaction tr)
 	{
-		return tr instanceof ClaimSell || (tr instanceof ClaimRent && ((ClaimRent)tr).rentedBy == null) || 
+		return tr instanceof ClaimSell || (tr instanceof ClaimRent && ((ClaimRent)tr).buyer == null) || 
 				(tr instanceof ClaimLease && ((ClaimLease)tr).buyer == null);
 	}
 

src/me/EtienneDx/RealEstate/Utils.java

@@ -16,10 +16,10 @@ import net.milkbowl.vault.economy.EconomyResponse;
 
 public class Utils
 {
-    public static boolean makePayment(UUID seller, UUID buyer, double amount, boolean msgSeller, boolean msgBuyer)
+    public static boolean makePayment(UUID receiver, UUID giver, double amount, boolean msgSeller, boolean msgBuyer)
     {
     	// seller might be null if it is the server
-    	OfflinePlayer s = seller != null ? Bukkit.getOfflinePlayer(seller) : null, b = Bukkit.getOfflinePlayer(buyer);
+    	OfflinePlayer s = receiver != null ? Bukkit.getOfflinePlayer(receiver) : null, b = Bukkit.getOfflinePlayer(giver);
     	if(!RealEstate.econ.has(b, amount))
     	{
     		if(b.isOnline() && msgBuyer)