Few suggestions

- Success message on transferring crypto between players
- Allowing players access to /cm balance <name> so they can compare their balance to others
- Check for resource file update

src/main/java/pl/csrv/divinecraft/evirth/cryptomarket/api/Player.java

@@ -321,6 +321,7 @@ public void transfer(String crypto, String amount, String toPlayer) {
 
             this.changeBalance(coin, -amountOfCrypto);
             this.printBalance();
+            this.player.sendMessage(String.format(CryptoMarket.resourceManager.getResource("TransferSuccess"), amountOfCrypto, coin.getSymbol(), coin.getPriceUSD() * amountOfCrypto, amountOfDiamonds, p2.name));
 
             double amountOfNewCoin = amountOfCrypto - (amountOfCrypto * CryptoMarket.config.getFee());
             int amountOfNewDiamonds = CoinHelper.calculateAmountOfDiamondsFromCoins(coin.getPriceUSD(), amountOfNewCoin);

src/main/java/pl/csrv/divinecraft/evirth/cryptomarket/commands/Permissions.java

@@ -3,4 +3,7 @@
 public final class Permissions {
     public static String CRYPTOMARKET_PLAYER = "cryptomarket.player";
     public static String CRYPTOMARKET_ADMIN = "cryptomarket.admin";
+    public static String CRYPTOMARKET_BALANCE_OTHERS = "cryptomarket.balance.others";
+    public static String CRYPTOMARKET_HISTORY_OTHERS = "cryptomarket.history.others";
+    public static String CRYPTOMARKET_STATS_OTHERS = "cryptomarket.stats.others";
 }

src/main/java/pl/csrv/divinecraft/evirth/cryptomarket/commands/player/BalanceCommand.java

@@ -31,8 +31,8 @@ public boolean execute(CommandSender commandSender, String[] strings) {
                 return true;
             }
 
-            boolean isAdmin = commandSender.hasPermission(Permissions.CRYPTOMARKET_ADMIN);
-            if (strings.length == 2 && !isAdmin) {
+            boolean extendedPermission = commandSender.hasPermission(Permissions.CRYPTOMARKET_ADMIN) || commandSender.hasPermission(Permissions.CRYPTOMARKET_BALANCE_OTHERS);
+            if (strings.length == 2 && !extendedPermission) {
                 commandSender.sendMessage(CryptoMarket.resourceManager.getResource("MissingPermission"));
                 return true;
             }

src/main/java/pl/csrv/divinecraft/evirth/cryptomarket/commands/player/HistoryCommand.java

@@ -27,7 +27,6 @@ public boolean execute(CommandSender commandSender, String[] strings) {
                 return true;
             }
 
-            boolean isAdmin = commandSender.hasPermission(Permissions.CRYPTOMARKET_ADMIN);
             OfflinePlayer o = null;
             if (strings.length > 1) {
                 o = Arrays.stream(Bukkit.getOfflinePlayers()).filter(f -> f.getName().equalsIgnoreCase(strings[1])).findFirst().orElse(null);
@@ -48,7 +47,8 @@ public boolean execute(CommandSender commandSender, String[] strings) {
                 return true;
             }
 
-            if (strings.length > 1 && !isAdmin && o != null) {
+            boolean extendedPersmission = commandSender.hasPermission(Permissions.CRYPTOMARKET_ADMIN) || commandSender.hasPermission(Permissions.CRYPTOMARKET_HISTORY_OTHERS);
+            if (strings.length > 1 && !extendedPersmission && o != null) {
                 commandSender.sendMessage(CryptoMarket.resourceManager.getResource("MissingPermission"));
                 return true;
             }

src/main/java/pl/csrv/divinecraft/evirth/cryptomarket/commands/player/StatsCommand.java

@@ -31,8 +31,8 @@ public boolean execute(CommandSender commandSender, String[] strings) {
                 return true;
             }
 
-            boolean isAdmin = commandSender.hasPermission(Permissions.CRYPTOMARKET_ADMIN);
-            if (strings.length == 2 && !isAdmin) {
+            boolean extendedPersmission = commandSender.hasPermission(Permissions.CRYPTOMARKET_ADMIN) || commandSender.hasPermission(Permissions.CRYPTOMARKET_STATS_OTHERS);
+            if (strings.length == 2 && !extendedPersmission) {
                 commandSender.sendMessage(CryptoMarket.resourceManager.getResource("MissingPermission"));
                 return true;
             }

src/main/java/pl/csrv/divinecraft/evirth/cryptomarket/resources/ResourceManager.java

@@ -1,20 +1,18 @@
 package main.java.pl.csrv.divinecraft.evirth.cryptomarket.resources;
 
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.nio.file.Paths;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
 import main.java.pl.csrv.divinecraft.evirth.cryptomarket.CryptoMarket;
 import org.bukkit.ChatColor;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.plugin.Plugin;
 
+import java.io.*;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
 public class ResourceManager {
     private Plugin plugin;
     private File resourceFile;
@@ -35,8 +33,22 @@ public ResourceManager(Plugin plugin) {
         try {
             for (String s : lang) {
                 String file = String.format("messages_%s.yml", s);
-                if (!new File(Paths.get(this.resourcePath, file).toString()).exists())
+                File f = new File(Paths.get(this.resourcePath, file).toString());
+                if (!f.exists()) {
                     this.exportResource(file);
+                } else {
+                    BufferedReader br = new BufferedReader(new InputStreamReader(ResourceManager.class.getResourceAsStream(file)));
+                    long resourceFileLines = br.lines().count();
+                    long currentFileLines = Files.lines(Paths.get(f.getPath())).count();
+
+                    if (currentFileLines != resourceFileLines) {
+                        File fbak = new File(Paths.get(this.resourcePath, file + ".old").toString());
+                        if (f.renameTo(fbak)) {
+                            this.exportResource(file);
+                            this.plugin.getLogger().info(String.format("Resource file '%s' has been updated.", file));
+                        }
+                    }
+                }
             }
         } catch (Exception e) {
             this.plugin.getLogger().warning("Cannot generate default resource messages.");

src/main/java/pl/csrv/divinecraft/evirth/cryptomarket/resources/messages_en.yml

@@ -28,6 +28,7 @@ PlayerDoesntHaveCoin: "&5%s&f doesn't have any &6%s&f coin."
 PlayerDoesntHaveThatManyCoins: "&5%s&f doesn't have that many &6%s&f coins."
 PlayerNotFound: "Could not find the Player '&5%s&f'."
 Stats: "You've deposited &c%d&f and withdrawn &a%d&f &bDiamond(s)&f.\nFinal balance: "
+TransferSuccess: "You have successfully transferred &6%.8f %s&f (&6$%.2f&f - &b%d Diamods(s)&f) to player &5%s&f!"
 Usage: "Usage"
 WithdrawAll: "You have withdrawn &b%d Diamond(s)&f."
 

src/plugin.yml

@@ -21,4 +21,17 @@ permission:
     description: Gives access to player's CryptoMarket commands
 
   cryptomarket.admin:
-    description: Gives access to admin's CryptoMarket commands
+    description: Gives access to admin's CryptoMarket commands
+    children:
+      cryptomarket.balance.others: true
+      cryptomarket.history.others: true
+      cryptomarket.stats.others: true
+
+  cryptomarket.balance.others:
+    description: Gives access to '/cm balance <player>' command
+
+  cryptomarket.history.others:
+    description: Gives access to '/cm history <player>' command
+
+  cryptomarket.stats.others:
+    description: Gives access to '/cm stats <player>' command