feat(better command abstraction)!: switch to brigadier (#8)

* feat: switch to brigadier

* some updates

* feat: make suggestion provider work

* supress warnings

* feat: pay & set command

* feat: give & take command, better suggestions, permissions

* refactor: cleanup

* fix: dont register pay if currency is not payable

* fix: send commands only if you have perms

* make second test currency not payable

* feat: use command's description & name

build.gradle.kts

@@ -28,6 +28,7 @@ subprojects {
     repositories {
         mavenCentral()
         maven("https://storehouse.okaeri.eu/repository/maven-public/")
+        maven("https://libraries.minecraft.net")
     }
 }
 

bukkit/build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
 repositories {
     maven("https://repo.extendedclip.com/content/repositories/placeholderapi")
 
-    maven("https://hub.spigotmc.org/nexus/content/repositories/snapshots/")
+    maven("https://repo.papermc.io/repository/maven-public/")
     maven("https://oss.sonatype.org/content/repositories/snapshots")
     maven("https://oss.sonatype.org/content/repositories/central")
 }
@@ -13,10 +13,10 @@ repositories {
 dependencies {
     implementation(project(":lighteco-common"))
 
-    implementation("dev.jorel:commandapi-bukkit-shade:9.5.0")
     implementation("net.kyori:adventure-platform-bukkit:4.2.0")
 
-    compileOnly("org.spigotmc:spigot-api:1.16.5-R0.1-SNAPSHOT")
+    compileOnly("io.papermc.paper:paper-api:1.19.1-R0.1-SNAPSHOT")
+    compileOnly("io.papermc.paper:paper-mojangapi:1.19.1-R0.1-SNAPSHOT")
 
     // PlaceholderAPI
     compileOnly("me.clip:placeholderapi:2.11.3")
@@ -29,7 +29,9 @@ dependencies {
 }
 
 tasks.shadowJar {
-    relocate("dev.jorel.commandapi", "dev.xhyrom.lighteco.libraries.commandapi")
+    dependencies {
+        exclude(dependency("com.mojang:brigadier"))
+    }
 
     // common
     relocate("eu.okaeri.configs", "dev.xhyrom.lighteco.libraries.okaeri.configs")

bukkit/src/main/java/dev/xhyrom/lighteco/bukkit/BukkitLightEcoBootstrap.java

@@ -1,7 +1,5 @@
 package dev.xhyrom.lighteco.bukkit;
 
-import dev.jorel.commandapi.CommandAPI;
-import dev.jorel.commandapi.CommandAPIBukkitConfig;
 import dev.xhyrom.lighteco.bukkit.logger.BukkitLogger;
 import dev.xhyrom.lighteco.common.plugin.bootstrap.LightEcoBootstrap;
 import dev.xhyrom.lighteco.common.plugin.bootstrap.LoaderBootstrap;
@@ -42,14 +40,10 @@ public class BukkitLightEcoBootstrap implements LightEcoBootstrap, LoaderBootstr
     @Override
     public void onLoad() {
         this.plugin.load();
-        CommandAPI.onLoad(new CommandAPIBukkitConfig(this.loader)
-                .verboseOutput(this.getPlugin().getConfig().debug)
-        );
     }
 
     @Override
     public void onEnable() {
-        CommandAPI.onEnable();
         this.plugin.enable();
 
         this.audience = BukkitAudiences.create(loader);
@@ -57,7 +51,6 @@ public class BukkitLightEcoBootstrap implements LightEcoBootstrap, LoaderBootstr
 
     @Override
     public void onDisable() {
-        CommandAPI.onDisable();
         this.plugin.disable();
     }
 
@@ -68,7 +61,7 @@ public class BukkitLightEcoBootstrap implements LightEcoBootstrap, LoaderBootstr
 
     @Override
     public Optional<UUID> lookupUniqueId(String username) {
-        return Optional.ofNullable(this.loader.getServer().getOfflinePlayer(username)).map(OfflinePlayer::getUniqueId);
+        return Optional.of(this.loader.getServer().getOfflinePlayer(username)).map(OfflinePlayer::getUniqueId);
     }
 
     @Override

bukkit/src/main/java/dev/xhyrom/lighteco/bukkit/BukkitLightEcoPlugin.java

@@ -4,6 +4,7 @@ import dev.xhyrom.lighteco.api.LightEco;
 import dev.xhyrom.lighteco.api.manager.ContextManager;
 import dev.xhyrom.lighteco.api.platform.Platform;
 import dev.xhyrom.lighteco.bukkit.hooks.Hooks;
+import dev.xhyrom.lighteco.bukkit.listeners.BukkitCommandSuggestionsListener;
 import dev.xhyrom.lighteco.bukkit.listeners.BukkitConnectionListener;
 import dev.xhyrom.lighteco.bukkit.manager.BukkitCommandManager;
 import dev.xhyrom.lighteco.bukkit.manager.BukkitContextManager;
@@ -36,6 +37,7 @@ public class BukkitLightEcoPlugin extends AbstractLightEcoPlugin {
     @Override
     protected void registerListeners() {
         this.bootstrap.getLoader().getServer().getPluginManager().registerEvents(new BukkitConnectionListener(this), this.bootstrap.getLoader());
+        this.bootstrap.getLoader().getServer().getPluginManager().registerEvents(new BukkitCommandSuggestionsListener(this), this.bootstrap.getLoader());
     }
 
     @Override

bukkit/src/main/java/dev/xhyrom/lighteco/bukkit/brigadier/BukkitBrigadier.java

@@ -0,0 +1,45 @@
+package dev.xhyrom.lighteco.bukkit.brigadier;
+
+import com.mojang.brigadier.suggestion.SuggestionProvider;
+import com.mojang.brigadier.tree.ArgumentCommandNode;
+import com.mojang.brigadier.tree.CommandNode;
+import com.mojang.brigadier.tree.LiteralCommandNode;
+import com.mojang.brigadier.tree.RootCommandNode;
+
+import java.lang.reflect.Field;
+import java.util.Iterator;
+import java.util.Map;
+
+public class BukkitBrigadier {
+    private static final Field CHILDREN_FIELD;
+    private static final Field LITERALS_FIELD;
+    private static final Field ARGUMENTS_FIELD;
+    private static final Field[] CHILDREN_FIELDS;
+
+    static {
+        try {
+            CHILDREN_FIELD = CommandNode.class.getDeclaredField("children");
+            LITERALS_FIELD = CommandNode.class.getDeclaredField("literals");
+            ARGUMENTS_FIELD = CommandNode.class.getDeclaredField("arguments");
+            CHILDREN_FIELDS = new Field[]{CHILDREN_FIELD, LITERALS_FIELD, ARGUMENTS_FIELD};
+
+            for (Field field : CHILDREN_FIELDS) {
+                field.setAccessible(true);
+            }
+        } catch (ReflectiveOperationException e) {
+            throw new ExceptionInInitializerError(e);
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public static void removeChild(RootCommandNode<?> root, String name) {
+        try {
+            for (Field field : CHILDREN_FIELDS) {
+                Map<String, ?> children = (Map<String, ?>) field.get(root);
+                children.remove(name);
+            }
+        } catch (ReflectiveOperationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

bukkit/src/main/java/dev/xhyrom/lighteco/bukkit/chat/BukkitCommandSender.java

@@ -32,6 +32,11 @@ public class BukkitCommandSender extends AbstractCommandSender<CommandSender> {
         return null;
     }
 
+    @Override
+    public boolean eligible(String permission) {
+        return this.delegate.hasPermission(permission);
+    }
+
     @Override
     public void sendMessage(Component message) {
         this.audience.sendMessage(message);

bukkit/src/main/java/dev/xhyrom/lighteco/bukkit/listeners/BukkitCommandSuggestionsListener.java

@@ -0,0 +1,43 @@
+package dev.xhyrom.lighteco.bukkit.listeners;
+
+import com.destroystokyo.paper.event.brigadier.AsyncPlayerSendCommandsEvent;
+import com.mojang.brigadier.tree.CommandNode;
+import com.mojang.brigadier.tree.LiteralCommandNode;
+import dev.xhyrom.lighteco.bukkit.BukkitLightEcoPlugin;
+import dev.xhyrom.lighteco.bukkit.brigadier.BukkitBrigadier;
+import dev.xhyrom.lighteco.bukkit.chat.BukkitCommandSender;
+import dev.xhyrom.lighteco.common.command.CommandSource;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+
+public class BukkitCommandSuggestionsListener implements Listener {
+    private final BukkitLightEcoPlugin plugin;
+
+    public BukkitCommandSuggestionsListener(BukkitLightEcoPlugin plugin) {
+        this.plugin = plugin;
+    }
+
+    @SuppressWarnings({"rawtypes", "unchecked", "deprecation"})
+    @EventHandler
+    public void onPlayerSendCommandsEvent(AsyncPlayerSendCommandsEvent<?> event) {
+        BukkitCommandSender sender = new BukkitCommandSender(event.getPlayer(), this.plugin.getCommandManager().audienceFactory);
+        CommandSource source = new CommandSource(this.plugin, sender);
+        if (event.isAsynchronous() || !event.hasFiredAsync()) {
+            for (CommandNode<CommandSource> command : this.plugin.getCommandManager().getDispatcher().getRoot().getChildren()) {
+                BukkitBrigadier.removeChild(event.getCommandNode(), command.getName());
+                BukkitBrigadier.removeChild(event.getCommandNode(), command.getName() + ":" + command.getName());
+
+                if (!command.canUse(source)) continue;
+
+                CommandNode<CommandSource> clone = new LiteralCommandNode(command.getName(), command.getCommand(), command.getRequirement(), command.getRedirect(), command.getRedirectModifier(), command.isFork());
+
+                for (CommandNode<CommandSource> child : command.getChildren()) {
+                    if (child.canUse(source))
+                        clone.addChild(child);
+                }
+
+                event.getCommandNode().addChild((CommandNode) clone);
+            }
+        }
+    }
+}

bukkit/src/main/java/dev/xhyrom/lighteco/bukkit/manager/BukkitCommandManager.java

@@ -1,18 +1,23 @@
 package dev.xhyrom.lighteco.bukkit.manager;
 
+import com.mojang.brigadier.ParseResults;
+import com.mojang.brigadier.tree.CommandNode;
 import dev.xhyrom.lighteco.bukkit.chat.BukkitCommandSender;
 import dev.xhyrom.lighteco.common.command.CommandManager;
+import dev.xhyrom.lighteco.common.command.CommandSource;
+import dev.xhyrom.lighteco.common.command.abstraction.Command;
 import dev.xhyrom.lighteco.common.model.currency.Currency;
 import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 import net.kyori.adventure.platform.bukkit.BukkitAudiences;
 import org.bukkit.Bukkit;
-import org.bukkit.command.Command;
 import org.bukkit.command.CommandMap;
 import org.bukkit.command.CommandSender;
 import org.bukkit.plugin.java.JavaPlugin;
 import org.jetbrains.annotations.NotNull;
 
 import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.List;
 
 public class BukkitCommandManager extends CommandManager {
     public final BukkitAudiences audienceFactory;
@@ -34,16 +39,50 @@ public class BukkitCommandManager extends CommandManager {
     }
 
     @Override
-    public void register(Currency currency, boolean main) {
+    public Command[] register(Currency currency, boolean main) {
-        super.register(currency, main);
+        Command[] commands = super.register(currency, main);
+
+        for (Command command : commands) {
+            this.registerToBukkit(command);
+        }
+
+        return commands;
+    }
+
+    private void registerToBukkit(Command command) {
+        org.bukkit.command.Command bukkitCommand = new org.bukkit.command.Command(
+                command.getName(),
+                command.getDescription(),
+                "/" + command.getName(),
+                command.getAliases()
+        ) {
+            private final CommandNode<CommandSource> node = getDispatcher().getRoot().getChild(getName());
 
-        commandMap.register(currency.getIdentifier(), new Command(currency.getIdentifier()) {
             @Override
             public boolean execute(@NotNull CommandSender commandSender, @NotNull String s, @NotNull String[] strings) {
                 bukkitCommandManagerExecute(new BukkitCommandSender(commandSender, audienceFactory), s, strings);
                 return true;
             }
-        });
+
+            @Override
+            public @NotNull List<String> tabComplete(@NotNull CommandSender sender, @NotNull String alias, @NotNull String[] args) throws IllegalArgumentException {
+                final List<String> suggestions = new ArrayList<>();
+                final CommandSource source = new CommandSource(plugin, new BukkitCommandSender(sender, audienceFactory));
+
+                final ParseResults<CommandSource> parseResults = getDispatcher().parse(
+                        getName() + (args.length > 0 ? " " + String.join(" ", args) : ""),
+                        source
+                );
+
+                getDispatcher().getCompletionSuggestions(
+                        parseResults
+                ).join().getList().forEach(suggestion -> suggestions.add(suggestion.getText()));
+
+                return suggestions;
+            }
+        };
+
+        commandMap.register(command.getName(), bukkitCommand);
     }
 
     private void bukkitCommandManagerExecute(dev.xhyrom.lighteco.common.model.chat.CommandSender sender, String name, String[] args) {

bukkittest/src/main/java/dev/xhyrom/lighteco/bukkittest/TestCurrency2.java

@@ -18,7 +18,7 @@ public class TestCurrency2 implements Currency {
 
     @Override
     public boolean isPayable() {
-        return true;
+        return false;
     }
 
     @Override

common/build.gradle.kts

@@ -2,10 +2,6 @@ plugins {
     id("lighteco.shadow-logic")
 }
 
-repositories {
-    maven("https://libraries.minecraft.net")
-}
-
 dependencies {
     api(project(":lighteco-api"))
     api("org.checkerframework:checker-qual:3.8.0")
@@ -23,7 +19,7 @@ dependencies {
     implementation("eu.okaeri:okaeri-configs-yaml-snakeyaml:5.0.0-beta.5")
     implementation("eu.okaeri:okaeri-configs-validator-okaeri:5.0.0-beta.5")
 
-    implementation("com.mojang:brigadier:1.0.18")
+    compileOnly("com.mojang:brigadier:1.0.18")
 
     compileOnly("com.zaxxer:HikariCP:5.0.1")
     compileOnly("redis.clients:jedis:5.1.0")

common/src/main/java/dev/xhyrom/lighteco/common/command/CommandManager.java

@@ -1,21 +1,28 @@
 package dev.xhyrom.lighteco.common.command;
 
+import com.mojang.brigadier.CommandDispatcher;
+import com.mojang.brigadier.ParseResults;
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
 import dev.xhyrom.lighteco.common.command.abstraction.Command;
-import dev.xhyrom.lighteco.common.command.argument.Arguments;
 import dev.xhyrom.lighteco.common.commands.BalanceCommand;
-import dev.xhyrom.lighteco.common.commands.BalanceOtherCommand;
 import dev.xhyrom.lighteco.common.commands.CurrencyParentCommand;
+import dev.xhyrom.lighteco.common.commands.PayCommand;
 import dev.xhyrom.lighteco.common.model.chat.CommandSender;
 import dev.xhyrom.lighteco.common.model.currency.Currency;
 import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
+import lombok.Getter;
 import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.event.ClickEvent;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.format.TextDecoration;
 
 import java.util.ArrayList;
 import java.util.List;
 
 public class CommandManager {
     protected final LightEcoPlugin plugin;
-    private final List<Command> commands = new ArrayList<>();
+    @Getter
+    private final CommandDispatcher<CommandSource> dispatcher = new CommandDispatcher<>();
 
     public CommandManager(LightEcoPlugin plugin) {
         this.plugin = plugin;
@@ -25,32 +32,53 @@ public class CommandManager {
         register(currency, false);
     }
 
-    public void register(Currency currency, boolean main) {
+    public Command[] register(Currency currency, boolean main) {
+        List<Command> commands = new ArrayList<>();
         commands.add(new CurrencyParentCommand(currency));
+
+        dispatcher.getRoot().addChild(commands.get(0).build());
         if (main) {
             commands.add(BalanceCommand.create(currency));
-            commands.add(BalanceOtherCommand.create(currency));
+            commands.add(PayCommand.create(currency));
+
+            dispatcher.getRoot().addChild(commands.get(1).build());
+            dispatcher.getRoot().addChild(commands.get(2).build());
         }
+
+        return commands.toArray(new Command[0]);
     }
 
     public void execute(CommandSender sender, String name, String[] args) {
-        List<Command> possibleCommands = this.commands.stream()
+        final CommandSource source = new CommandSource(this.plugin, sender);
-                .filter(cmd -> cmd.getName().equalsIgnoreCase(name))
+        final ParseResults<CommandSource> parseResults = dispatcher.parse(
-                .toList();
+                name + (args.length > 0 ? " " + String.join(" ", args) : ""),
+                source
+        );
 
-        if (possibleCommands.isEmpty()) {
+        try {
-            sender.sendMessage(Component.text("Command not found.")); // TODO: change
+            dispatcher.execute(parseResults);
-            return;
+        } catch (CommandSyntaxException e) {
+            sender.sendMessage(Component.text(e.getRawMessage().getString(), NamedTextColor.RED));
+
+            if (e.getInput() != null && e.getCursor() >= 0) {
+                int j = Math.min(e.getInput().length(), e.getCursor());
+
+                Component msg = Component.empty().color(NamedTextColor.GRAY).clickEvent(ClickEvent.clickEvent(ClickEvent.Action.SUGGEST_COMMAND, "/" + name));
+
+                if (j > 10) {
+                    msg = msg.append(Component.text("..."));
                 }
 
-        // get command according to args
+                msg = msg.append(Component.text(e.getInput().substring(Math.max(0, j - 10), j)));
-        Command command = possibleCommands.stream()
-                .filter(cmd -> cmd.getArgs().size() == args.length)
-                .findFirst()
-                .orElse(null);
 
-        System.out.println("[Manager] Command: " + command.getName() + " (" + command.getClass().getName() + ")" + " / " + command.getArgs());
+                if (j < e.getInput().length()) {
+                    Component component = Component.text(e.getInput().substring(j)).color(NamedTextColor.RED).decorate(TextDecoration.UNDERLINED);
+                    msg = msg.append(component);
+                }
 
-        command.execute(this.plugin, sender, new Arguments(plugin, command, List.of(args)));
+                msg = msg.append(Component.translatable("command.context.here").color(NamedTextColor.RED).decorate(TextDecoration.ITALIC));
+                sender.sendMessage(msg);
+            }
+        }
     }
 }

common/src/main/java/dev/xhyrom/lighteco/common/command/CommandSource.java

@@ -0,0 +1,8 @@
+package dev.xhyrom.lighteco.common.command;
+
+import dev.xhyrom.lighteco.common.model.chat.CommandSender;
+import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+public record CommandSource(@NonNull LightEcoPlugin plugin, @NonNull CommandSender sender) {
+}

common/src/main/java/dev/xhyrom/lighteco/common/command/abstraction/Command.java

@@ -1,36 +1,44 @@
 package dev.xhyrom.lighteco.common.command.abstraction;
 
-import dev.xhyrom.lighteco.common.command.argument.Argument;
+import com.mojang.brigadier.builder.LiteralArgumentBuilder;
-import dev.xhyrom.lighteco.common.command.argument.Arguments;
+import com.mojang.brigadier.tree.CommandNode;
+import com.mojang.brigadier.tree.LiteralCommandNode;
+import dev.xhyrom.lighteco.common.command.CommandSource;
 import dev.xhyrom.lighteco.common.config.message.CurrencyMessageConfig;
-import dev.xhyrom.lighteco.common.model.chat.CommandSender;
 import dev.xhyrom.lighteco.common.model.currency.Currency;
 import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 import lombok.Getter;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
+import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 
 @Getter
 public abstract class Command {
     @NonNull
-    private final String name;
+    protected final String name;
-
-    @Nullable
-    private final String permission;
 
     @NonNull
-    private final List<Argument<?>> args;
+    private final String description;
 
-    public Command(@NonNull String name, @Nullable String permission, @NonNull Argument<?>... args) {
+    @NonNull
+    private final List<String> aliases = new ArrayList<>();
+
+    public Command(@NonNull String name, @NonNull String description, String... aliases) {
         this.name = name;
-        this.permission = permission;
+        this.description = description;
-        this.args = List.of(args);
+
+        Collections.addAll(this.aliases, aliases);
     }
 
-    public abstract void execute(LightEcoPlugin plugin, CommandSender sender, Arguments args);
+    public abstract CommandNode<CommandSource> build();
+
+    protected LiteralArgumentBuilder<CommandSource> builder() {
+        return LiteralArgumentBuilder.literal(name);
+    }
 
     protected CurrencyMessageConfig getCurrencyMessageConfig(LightEcoPlugin plugin, Currency currency) {
         Map<String, CurrencyMessageConfig> config = plugin.getConfig().messages.currency;

common/src/main/java/dev/xhyrom/lighteco/common/command/abstraction/ParentCommand.java

@@ -1,41 +0,0 @@
-package dev.xhyrom.lighteco.common.command.abstraction;
-
-import dev.xhyrom.lighteco.common.command.argument.Arguments;
-import dev.xhyrom.lighteco.common.command.argument.type.StringArgument;
-import dev.xhyrom.lighteco.common.model.chat.CommandSender;
-import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
-import lombok.Getter;
-import net.kyori.adventure.text.Component;
-import org.checkerframework.checker.nullness.qual.NonNull;
-import org.checkerframework.checker.nullness.qual.Nullable;
-
-import java.util.Arrays;
-
-@Getter
-public class ParentCommand extends Command {
-    private final Command[] children;
-
-    public ParentCommand(@NonNull String name, @Nullable String permission, @NonNull Command... children) {
-        super(name, permission, new StringArgument("child"));
-
-        this.children = children;
-    }
-
-    @Override
-    public void execute(LightEcoPlugin plugin, CommandSender sender, Arguments args) {
-        String childName = args.string("child");
-        Command child = Arrays.stream(getChildren())
-                .filter(cmd -> cmd.getName().equalsIgnoreCase(childName) && (cmd.getArgs().size() == args.size() - 1 || cmd.getArgs().size() < args.size()))
-                .max((cmd1, cmd2) -> Integer.compare(cmd2.getArgs().size(), cmd1.getArgs().size()))
-                .orElse(null);
-
-        if (child == null) {
-            sender.sendMessage(Component.text("Command not found. / Parent Command"));
-            return;
-        }
-
-        System.out.println("Parent Command: " + getName() + " (" + getClass().getName() + ") " + " / Child Command: " + child.getName() + " (" + child.getClass().getName() + ")");
-
-        child.execute(plugin, sender, args.subList(1));
-    }
-}

common/src/main/java/dev/xhyrom/lighteco/common/command/argument/Argument.java

@@ -1,18 +0,0 @@
-package dev.xhyrom.lighteco.common.command.argument;
-
-import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
-import lombok.Getter;
-
-public abstract class Argument<T> {
-    @Getter
-    private final String name;
-
-    protected Argument(String name) {
-        this.name = name;
-    }
-
-    public abstract Class<T> getPrimitiveType();
-    public abstract ArgumentType getArgumentType();
-
-    public abstract T parse(LightEcoPlugin plugin, String input);
-}

common/src/main/java/dev/xhyrom/lighteco/common/command/argument/ArgumentType.java

@@ -1,8 +0,0 @@
-package dev.xhyrom.lighteco.common.command.argument;
-
-public enum ArgumentType {
-    STRING,
-    OFFLINE_USER,
-    INTEGER,
-    DOUBLE;
-}

common/src/main/java/dev/xhyrom/lighteco/common/command/argument/Arguments.java

@@ -1,58 +0,0 @@
-package dev.xhyrom.lighteco.common.command.argument;
-
-import dev.xhyrom.lighteco.common.command.abstraction.Command;
-import dev.xhyrom.lighteco.common.model.user.User;
-import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
-
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-public class Arguments {
-    private final LightEcoPlugin plugin;
-    private final Command command;
-    private final List<String> arguments;
-    private final Map<String, Object> mappedArguments = new HashMap<>();
-
-    public Arguments(LightEcoPlugin plugin, Command command, List<String> arguments) {
-        this.plugin = plugin;
-        this.command = command;
-        this.arguments = arguments;
-
-        System.out.println("Arguments: " + arguments);
-        System.out.println("Command: " + command.getName() + " (" + command.getClass().getName() + ")" + " / " + command.getArgs());
-        for (int i = 0; i < command.getArgs().size(); i++) {
-            String arg = arguments.get(i);
-            System.out.println("Argument: " + arg + " / " + command.getArgs().get(i).getName());
-            this.mappedArguments.put(command.getArgs().get(i).getName(), (Object) command.getArgs().get(i).parse(plugin, arg));
-        }
-    }
-
-    public String string(String name) {
-        return (String) this.mappedArguments.get(name);
-    }
-
-    public User offlineUser(String name) {
-        return (User) this.mappedArguments.get(name);
-    }
-
-    public int integer(String name) {
-        return (int) this.mappedArguments.get(name);
-    }
-
-    public double dbl(String name) {
-        return (double) this.mappedArguments.get(name);
-    }
-
-    public String raw(int index) {
-        return (String) this.arguments.get(index);
-    }
-
-    public int size() {
-        return this.arguments.size();
-    }
-
-    public Arguments subList(int fromIndex) {
-        return new Arguments(this.plugin, this.command, this.arguments.subList(fromIndex, this.arguments.size()));
-    }
-}

common/src/main/java/dev/xhyrom/lighteco/common/command/argument/type/DoubleArgument.java

@@ -1,24 +0,0 @@
-package dev.xhyrom.lighteco.common.command.argument.type;
-
-import dev.xhyrom.lighteco.common.command.argument.ArgumentType;
-
-public class DoubleArgument extends NumberArgument<Double> {
-    protected DoubleArgument(String name, Double min, Double max) {
-        super(name, min, max);
-    }
-
-    @Override
-    public Class<Double> getPrimitiveType() {
-        return Double.class;
-    }
-
-    @Override
-    public ArgumentType getArgumentType() {
-        return ArgumentType.DOUBLE;
-    }
-
-    @Override
-    public Double parse(String input) {
-        return Double.parseDouble(input);
-    }
-}

common/src/main/java/dev/xhyrom/lighteco/common/command/argument/type/IntegerArgument.java

@@ -1,24 +0,0 @@
-package dev.xhyrom.lighteco.common.command.argument.type;
-
-import dev.xhyrom.lighteco.common.command.argument.ArgumentType;
-
-public class IntegerArgument extends NumberArgument<Integer> {
-    protected IntegerArgument(String name, Integer min, Integer max) {
-        super(name, min, max);
-    }
-
-    @Override
-    public Class<Integer> getPrimitiveType() {
-        return Integer.class;
-    }
-
-    @Override
-    public ArgumentType getArgumentType() {
-        return ArgumentType.INTEGER;
-    }
-
-    @Override
-    public Integer parse(String input) {
-        return Integer.parseInt(input);
-    }
-}

common/src/main/java/dev/xhyrom/lighteco/common/command/argument/type/NumberArgument.java

@@ -1,32 +0,0 @@
-package dev.xhyrom.lighteco.common.command.argument.type;
-
-import dev.xhyrom.lighteco.common.command.argument.Argument;
-import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
-
-abstract class NumberArgument<T> extends Argument<T> {
-    private final T min;
-    private final T max;
-
-    protected NumberArgument(String name, T min, T max) {
-        super(name);
-
-        this.min = min;
-        this.max = max;
-    }
-
-    public abstract T parse(String input);
-
-    @Override
-    public T parse(LightEcoPlugin plugin, String input) {
-        T value = parse(input);
-        if (value == null || (min != null && compare(value, min) < 0) || (max != null && compare(value, max) > 0)) {
-            return null;
-        }
-
-        return value;
-    }
-
-    private int compare(T a, T b) {
-        return ((Comparable<T>) a).compareTo(b);
-    }
-}

common/src/main/java/dev/xhyrom/lighteco/common/command/argument/type/OfflineUserArgument.java

@@ -1,34 +1,32 @@
 package dev.xhyrom.lighteco.common.command.argument.type;
 
-import dev.xhyrom.lighteco.common.command.argument.Argument;
+import com.mojang.brigadier.StringReader;
-import dev.xhyrom.lighteco.common.command.argument.ArgumentType;
+import com.mojang.brigadier.arguments.ArgumentType;
+import com.mojang.brigadier.context.CommandContext;
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import dev.xhyrom.lighteco.common.command.CommandSource;
 import dev.xhyrom.lighteco.common.model.user.User;
 import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 
 import java.util.UUID;
 
-public class OfflineUserArgument extends Argument<User> {
+public class OfflineUserArgument implements ArgumentType<String> {
-    public OfflineUserArgument(String name) {
+    private OfflineUserArgument() {}
-        super(name);
-    }
 
-    @Override
+    public static User getOfflineUser(CommandContext<CommandSource> context, String name) {
-    public Class<User> getPrimitiveType() {
+        String userName = context.getArgument(name, String.class);
-        return User.class;
+        LightEcoPlugin plugin = context.getSource().plugin();
-    }
 
-    @Override
+        UUID uniqueId = plugin.getBootstrap().lookupUniqueId(userName).orElse(null);
-    public ArgumentType getArgumentType() {
-        return ArgumentType.OFFLINE_USER;
-    }
-
-    @Override
-    public User parse(LightEcoPlugin plugin, String input) {
-        UUID uniqueId = plugin.getBootstrap().lookupUniqueId(input).orElse(null);
         if (uniqueId == null) {
             return null;
         }
 
         return plugin.getUserManager().loadUser(uniqueId).join();
     }
+
+    @Override
+    public String parse(StringReader reader) throws CommandSyntaxException {
+        return reader.readString();
+    }
 }

common/src/main/java/dev/xhyrom/lighteco/common/command/argument/type/StringArgument.java

@@ -1,29 +0,0 @@
-package dev.xhyrom.lighteco.common.command.argument.type;
-
-import dev.xhyrom.lighteco.common.command.argument.Argument;
-import dev.xhyrom.lighteco.common.command.argument.ArgumentType;
-import dev.xhyrom.lighteco.common.model.user.User;
-import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
-
-import java.util.UUID;
-
-public class StringArgument extends Argument<String> {
-    public StringArgument(String name) {
-        super(name);
-    }
-
-    @Override
-    public Class<String> getPrimitiveType() {
-        return String.class;
-    }
-
-    @Override
-    public ArgumentType getArgumentType() {
-        return ArgumentType.STRING;
-    }
-
-    @Override
-    public String parse(LightEcoPlugin plugin, String input) {
-        return input;
-    }
-}

common/src/main/java/dev/xhyrom/lighteco/common/command/suggestion/type/OfflineUserSuggestionProvider.java

@@ -0,0 +1,34 @@
+package dev.xhyrom.lighteco.common.command.suggestion.type;
+
+import com.mojang.brigadier.context.CommandContext;
+import com.mojang.brigadier.suggestion.SuggestionProvider;
+import com.mojang.brigadier.suggestion.Suggestions;
+import com.mojang.brigadier.suggestion.SuggestionsBuilder;
+import dev.xhyrom.lighteco.common.command.CommandSource;
+import dev.xhyrom.lighteco.common.model.user.User;
+import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
+
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+
+public class OfflineUserSuggestionProvider implements SuggestionProvider<CommandSource> {
+    public static OfflineUserSuggestionProvider create() {
+        return new OfflineUserSuggestionProvider();
+    }
+
+    @Override
+    public CompletableFuture<Suggestions> getSuggestions(CommandContext<CommandSource> context, SuggestionsBuilder builder) {
+        LightEcoPlugin plugin = context.getSource().plugin();
+
+        String remaining = builder.getRemaining();
+
+        for (UUID uniqueId : plugin.getBootstrap().getOnlinePlayers()) {
+            User user = plugin.getUserManager().getIfLoaded(uniqueId);
+            if (user == null) continue;
+
+            builder.suggest(user.getUsername());
+        }
+
+        return builder.buildFuture();
+    }
+}

common/src/main/java/dev/xhyrom/lighteco/common/commands/BalanceCommand.java

@@ -1,10 +1,14 @@
 package dev.xhyrom.lighteco.common.commands;
 
+import com.mojang.brigadier.arguments.StringArgumentType;
+import com.mojang.brigadier.builder.RequiredArgumentBuilder;
+import com.mojang.brigadier.context.CommandContext;
+import com.mojang.brigadier.suggestion.SuggestionProvider;
+import com.mojang.brigadier.tree.CommandNode;
+import dev.xhyrom.lighteco.common.command.CommandSource;
 import dev.xhyrom.lighteco.common.command.abstraction.Command;
-import dev.xhyrom.lighteco.common.command.argument.Argument;
-import dev.xhyrom.lighteco.common.command.argument.Arguments;
 import dev.xhyrom.lighteco.common.command.argument.type.OfflineUserArgument;
-import dev.xhyrom.lighteco.common.config.message.CurrencyMessageConfig;
+import dev.xhyrom.lighteco.common.command.suggestion.type.OfflineUserSuggestionProvider;
 import dev.xhyrom.lighteco.common.model.chat.CommandSender;
 import dev.xhyrom.lighteco.common.model.currency.Currency;
 import dev.xhyrom.lighteco.common.model.user.User;
@@ -12,26 +16,58 @@ import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 import net.kyori.adventure.text.minimessage.MiniMessage;
 import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
 import org.checkerframework.checker.nullness.qual.NonNull;
-import org.checkerframework.checker.nullness.qual.Nullable;
 
 import java.math.BigDecimal;
-import java.util.Map;
+
+import static com.mojang.brigadier.Command.SINGLE_SUCCESS;
 
 public class BalanceCommand extends Command {
     private final Currency currency;
 
     public static BalanceCommand create(@NonNull Currency currency) {
-        return new BalanceCommand(currency.getIdentifier() + ".balance", currency);
+        return new BalanceCommand(currency);
     }
 
-    public BalanceCommand(@Nullable String permission, @NonNull Currency currency) {
+    public BalanceCommand(@NonNull Currency currency) {
-        super("balance", permission, new Argument<?>[0]);
+        super("balance", "Check your balance");
 
         this.currency = currency;
     }
 
     @Override
-    public void execute(LightEcoPlugin plugin, CommandSender sender, Arguments args) {
+    public CommandNode<CommandSource> build() {
+        return builder()
+                .then(
+                        RequiredArgumentBuilder.<CommandSource, String>argument("target", StringArgumentType.word())
+                                .suggests(OfflineUserSuggestionProvider.create())
+                                .requires((source) -> source.sender().eligible("lighteco.currency."+currency.getIdentifier()+".command.balance.others"))
+                                .executes(context -> {
+                                    LightEcoPlugin plugin = context.getSource().plugin();
+                                    CommandSender sender = context.getSource().sender();
+
+                                    User target = OfflineUserArgument.getOfflineUser(context, "target");
+                                    if (target == null || target.getUsername() == null) {
+                                        return SINGLE_SUCCESS;
+                                    }
+
+                                    BigDecimal balance = target.getBalance(currency);
+
+                                    sender.sendMessage(
+                                            MiniMessage.miniMessage().deserialize(
+                                                    getCurrencyMessageConfig(plugin, currency).balanceOthers,
+                                                    Placeholder.parsed("currency", currency.getIdentifier()),
+                                                    Placeholder.parsed("target", target.getUsername()),
+                                                    Placeholder.parsed("balance", balance.toPlainString())
+                                            )
+                                    );
+
+                                    return SINGLE_SUCCESS;
+                                }))
+                .requires((source) -> source.sender().eligible("lighteco.currency."+currency.getIdentifier()+".command.balance"))
+                .executes(context -> {
+                    LightEcoPlugin plugin = context.getSource().plugin();
+                    CommandSender sender = context.getSource().sender();
+
                     User user = plugin.getUserManager().getIfLoaded(sender.getUniqueId());
                     BigDecimal balance = user.getBalance(currency);
 
@@ -42,5 +78,9 @@ public class BalanceCommand extends Command {
                                     Placeholder.parsed("balance", balance.toPlainString())
                             )
                     );
+
+                    return SINGLE_SUCCESS;
+                })
+                .build();
     }
 }

common/src/main/java/dev/xhyrom/lighteco/common/commands/BalanceOtherCommand.java

@@ -1,46 +0,0 @@
-package dev.xhyrom.lighteco.common.commands;
-
-import dev.xhyrom.lighteco.common.command.abstraction.Command;
-import dev.xhyrom.lighteco.common.command.argument.Arguments;
-import dev.xhyrom.lighteco.common.command.argument.type.OfflineUserArgument;
-import dev.xhyrom.lighteco.common.config.message.CurrencyMessageConfig;
-import dev.xhyrom.lighteco.common.model.chat.CommandSender;
-import dev.xhyrom.lighteco.common.model.currency.Currency;
-import dev.xhyrom.lighteco.common.model.user.User;
-import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
-import net.kyori.adventure.text.minimessage.MiniMessage;
-import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
-import org.checkerframework.checker.nullness.qual.NonNull;
-import org.checkerframework.checker.nullness.qual.Nullable;
-
-import java.math.BigDecimal;
-import java.util.Map;
-
-public class BalanceOtherCommand extends Command {
-    private final Currency currency;
-
-    public static BalanceOtherCommand create(@NonNull Currency currency) {
-        return new BalanceOtherCommand(currency.getIdentifier() + ".balance.others", currency);
-    }
-
-    public BalanceOtherCommand(@Nullable String permission, @NonNull Currency currency) {
-        super("balance", permission, new OfflineUserArgument("target"));
-
-        this.currency = currency;
-    }
-
-    @Override
-    public void execute(LightEcoPlugin plugin, CommandSender sender, Arguments args) {
-        User target = args.offlineUser("target");
-        BigDecimal balance = target.getBalance(currency);
-
-        sender.sendMessage(
-                MiniMessage.miniMessage().deserialize(
-                        getCurrencyMessageConfig(plugin, currency).balanceOthers,
-                        Placeholder.parsed("currency", currency.getIdentifier()),
-                        Placeholder.parsed("target", target.getUsername()),
-                        Placeholder.parsed("balance", balance.toPlainString())
-                )
-        );
-    }
-}

common/src/main/java/dev/xhyrom/lighteco/common/commands/CurrencyParentCommand.java

@@ -1,16 +1,61 @@
 package dev.xhyrom.lighteco.common.commands;
 
-import dev.xhyrom.lighteco.common.command.abstraction.ParentCommand;
+import com.mojang.brigadier.builder.LiteralArgumentBuilder;
+import com.mojang.brigadier.tree.CommandNode;
+import dev.xhyrom.lighteco.common.command.CommandSource;
+import dev.xhyrom.lighteco.common.command.abstraction.Command;
+import dev.xhyrom.lighteco.common.model.chat.CommandSender;
 import dev.xhyrom.lighteco.common.model.currency.Currency;
+import dev.xhyrom.lighteco.common.model.user.User;
+import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
-public class CurrencyParentCommand extends ParentCommand {
+import java.math.BigDecimal;
+
+import static com.mojang.brigadier.Command.SINGLE_SUCCESS;
+
+public class CurrencyParentCommand extends Command {
+    private final Currency currency;
+
     public CurrencyParentCommand(@NonNull Currency currency) {
         super(
                 currency.getIdentifier(),
-                currency.getIdentifier(),
+                currency.getIdentifier()
-                BalanceCommand.create(currency),
-                BalanceOtherCommand.create(currency)
         );
+
+        this.currency = currency;
+    }
+
+    @Override
+    public CommandNode<CommandSource> build() {
+        LiteralArgumentBuilder<CommandSource> builder = builder()
+                .then(BalanceCommand.create(currency).build())
+                .then(SetCommand.create(currency).build())
+                .then(GiveCommand.create(currency).build())
+                .then(TakeCommand.create(currency).build())
+                .executes(context -> {
+                    LightEcoPlugin plugin = context.getSource().plugin();
+                    CommandSender sender = context.getSource().sender();
+
+                    User user = plugin.getUserManager().getIfLoaded(sender.getUniqueId());
+                    BigDecimal balance = user.getBalance(currency);
+
+                    sender.sendMessage(
+                            MiniMessage.miniMessage().deserialize(
+                                    getCurrencyMessageConfig(plugin, currency).balance,
+                                    Placeholder.parsed("currency", currency.getIdentifier()),
+                                    Placeholder.parsed("balance", balance.toPlainString())
+                            )
+                    );
+
+                    return SINGLE_SUCCESS;
+                });
+
+        if (currency.isPayable())
+            builder = builder.then(PayCommand.create(currency).build());
+
+        return builder.build();
     }
 }

common/src/main/java/dev/xhyrom/lighteco/common/commands/GiveCommand.java

@@ -0,0 +1,107 @@
+package dev.xhyrom.lighteco.common.commands;
+
+import com.mojang.brigadier.arguments.DoubleArgumentType;
+import com.mojang.brigadier.arguments.IntegerArgumentType;
+import com.mojang.brigadier.arguments.StringArgumentType;
+import com.mojang.brigadier.builder.RequiredArgumentBuilder;
+import com.mojang.brigadier.context.CommandContext;
+import com.mojang.brigadier.tree.CommandNode;
+import dev.xhyrom.lighteco.api.exception.CannotBeGreaterThan;
+import dev.xhyrom.lighteco.common.command.CommandSource;
+import dev.xhyrom.lighteco.common.command.abstraction.Command;
+import dev.xhyrom.lighteco.common.command.argument.type.OfflineUserArgument;
+import dev.xhyrom.lighteco.common.command.suggestion.type.OfflineUserSuggestionProvider;
+import dev.xhyrom.lighteco.common.model.chat.CommandSender;
+import dev.xhyrom.lighteco.common.model.currency.Currency;
+import dev.xhyrom.lighteco.common.model.user.User;
+import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+import static com.mojang.brigadier.Command.SINGLE_SUCCESS;
+
+public class GiveCommand extends Command {
+    private static final MiniMessage miniMessage = MiniMessage.miniMessage();
+    private final Currency currency;
+
+    public static GiveCommand create(@NonNull Currency currency) {
+        return new GiveCommand(currency);
+    }
+
+    public GiveCommand(@NonNull Currency currency) {
+        super("give", "Give a player some money");
+
+        this.currency = currency;
+    }
+
+    private void execute(CommandContext<CommandSource> context) {
+        final LightEcoPlugin plugin = context.getSource().plugin();
+        final CommandSender sender = context.getSource().sender();
+
+        final User target = OfflineUserArgument.getOfflineUser(context, "target");
+        if (target == null || target.getUsername() == null) {
+            return;
+        }
+
+        BigDecimal amount = BigDecimal.valueOf(currency.fractionalDigits() > 0
+                ? context.getArgument("amount", Double.class)
+                : context.getArgument("amount", Integer.class));
+
+        amount = amount.setScale(currency.fractionalDigits(), RoundingMode.DOWN);
+
+        try {
+            target.deposit(currency, amount);
+        } catch (CannotBeGreaterThan e) {
+            sender.sendMessage(
+                    miniMessage.deserialize(
+                            this.getCurrencyMessageConfig(plugin, this.currency).cannotBeGreaterThan,
+                            Placeholder.parsed("max", plugin.getConfig().maximumBalance.toPlainString())
+                    )
+            );
+
+            return;
+        }
+
+        sender.sendMessage(
+                miniMessage.deserialize(
+                        this.getCurrencyMessageConfig(plugin, this.currency).set,
+                        Placeholder.parsed("currency", currency.getIdentifier()),
+                        Placeholder.parsed("target", target.getUsername()),
+                        Placeholder.parsed("amount", amount.toPlainString())
+                )
+        );
+    }
+
+    @Override
+    public CommandNode<CommandSource> build() {
+        if (currency.fractionalDigits() > 0) {
+            return builder()
+                    .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.give"))
+                    .then(RequiredArgumentBuilder.<CommandSource, String>argument("target", StringArgumentType.word())
+                            .suggests(OfflineUserSuggestionProvider.create())
+                            .then(RequiredArgumentBuilder.<CommandSource, Double>argument("amount", DoubleArgumentType.doubleArg(1))
+                                    .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.give"))
+                                    .executes(c -> {
+                                        execute(c);
+                                        return SINGLE_SUCCESS;
+                                    })))
+                            .build();
+        }
+
+        return builder()
+                .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.give"))
+                .then(RequiredArgumentBuilder.<CommandSource, String>argument("target", StringArgumentType.word())
+                        .suggests(OfflineUserSuggestionProvider.create())
+                        .then(RequiredArgumentBuilder.<CommandSource, Integer>argument("amount", IntegerArgumentType.integer(1))
+                                .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.give"))
+                                .executes(c -> {
+                                    execute(c);
+                                    return SINGLE_SUCCESS;
+                                })))
+                .build();
+    }
+}

common/src/main/java/dev/xhyrom/lighteco/common/commands/PayCommand.java

@@ -0,0 +1,151 @@
+package dev.xhyrom.lighteco.common.commands;
+
+import com.mojang.brigadier.arguments.DoubleArgumentType;
+import com.mojang.brigadier.arguments.IntegerArgumentType;
+import com.mojang.brigadier.arguments.StringArgumentType;
+import com.mojang.brigadier.builder.RequiredArgumentBuilder;
+import com.mojang.brigadier.context.CommandContext;
+import com.mojang.brigadier.tree.CommandNode;
+import dev.xhyrom.lighteco.api.exception.CannotBeGreaterThan;
+import dev.xhyrom.lighteco.common.command.CommandSource;
+import dev.xhyrom.lighteco.common.command.abstraction.Command;
+import dev.xhyrom.lighteco.common.command.argument.type.OfflineUserArgument;
+import dev.xhyrom.lighteco.common.command.suggestion.type.OfflineUserSuggestionProvider;
+import dev.xhyrom.lighteco.common.model.chat.CommandSender;
+import dev.xhyrom.lighteco.common.model.currency.Currency;
+import dev.xhyrom.lighteco.common.model.user.User;
+import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+import static com.mojang.brigadier.Command.SINGLE_SUCCESS;
+
+public class PayCommand extends Command {
+    private static final MiniMessage miniMessage = MiniMessage.miniMessage();
+    private final Currency currency;
+
+    public static PayCommand create(@NonNull Currency currency) {
+        return new PayCommand(currency);
+    }
+
+    public PayCommand(@NonNull Currency currency) {
+        super("pay", "Pay a player");
+
+        this.currency = currency;
+    }
+
+    private void execute(CommandContext<CommandSource> context) {
+        final LightEcoPlugin plugin = context.getSource().plugin();
+        final CommandSender sender = context.getSource().sender();
+
+        final User target = OfflineUserArgument.getOfflineUser(context, "target");
+        if (target == null || target.getUsername() == null) {
+            return;
+        }
+
+        BigDecimal amount = BigDecimal.valueOf(currency.fractionalDigits() > 0
+                ? context.getArgument("amount", Double.class)
+                : context.getArgument("amount", Integer.class));
+
+        amount = amount.setScale(currency.fractionalDigits(), RoundingMode.DOWN);
+
+        final User user = plugin.getUserManager().getIfLoaded(sender.getUniqueId());
+        if (user == null) {
+            return;
+        }
+
+        if (user.getBalance(this.currency).compareTo(amount) < 0) {
+            sender.sendMessage(
+                    miniMessage.deserialize(this.getCurrencyMessageConfig(plugin, this.currency).notEnoughMoney)
+            );
+
+            return;
+        }
+
+        // calculate tax using Currency#calculateTax
+        BigDecimal tax = currency.getProxy().calculateTax(user.getProxy(), amount);
+        tax = tax.setScale(currency.getProxy().fractionalDigits(), RoundingMode.DOWN);
+
+        // subtract tax from amount
+        BigDecimal taxedAmount = amount.subtract(tax);
+
+        try {
+            target.deposit(currency, taxedAmount);
+            user.withdraw(currency, amount);
+        } catch (CannotBeGreaterThan e) {
+            sender.sendMessage(
+                    miniMessage.deserialize(
+                            this.getCurrencyMessageConfig(plugin, this.currency).cannotBeGreaterThan,
+                            Placeholder.parsed("max", plugin.getConfig().maximumBalance.toPlainString())
+                    )
+            );
+
+            return;
+        }
+
+        String template = tax.compareTo(BigDecimal.ZERO) > 0
+                ? this.getCurrencyMessageConfig(plugin, this.currency).payWithTax
+                : this.getCurrencyMessageConfig(plugin, this.currency).pay;
+
+        String templateReceived = tax.compareTo(BigDecimal.ZERO) > 0
+                ? this.getCurrencyMessageConfig(plugin, this.currency).payReceivedWithTax
+                : this.getCurrencyMessageConfig(plugin, this.currency).payReceived;
+
+        sender.sendMessage(
+                miniMessage.deserialize(
+                        template,
+                        Placeholder.parsed("currency", currency.getIdentifier()),
+                        Placeholder.parsed("target", target.getUsername()),
+                        Placeholder.parsed("amount", amount.toPlainString()),
+                        Placeholder.parsed("taxed_amount", taxedAmount.toPlainString()),
+                        Placeholder.parsed("sender_balance", user.getBalance(currency).toPlainString()),
+                        Placeholder.parsed("receiver_balance", target.getBalance(currency).toPlainString())
+                )
+        );
+
+        target.sendMessage(
+                miniMessage.deserialize(
+                        templateReceived,
+                        Placeholder.parsed("currency", currency.getIdentifier()),
+                        Placeholder.parsed("sender", user.getUsername()),
+                        Placeholder.parsed("amount", amount.toPlainString()),
+                        Placeholder.parsed("taxed_amount", taxedAmount.toPlainString()),
+                        Placeholder.parsed("sender_balance", user.getBalance(currency).toPlainString()),
+                        Placeholder.parsed("receiver_balance", target.getBalance(currency).toPlainString())
+                )
+        );
+    }
+
+    @Override
+    public CommandNode<CommandSource> build() {
+        if (currency.fractionalDigits() > 0) {
+            return builder()
+                    .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.pay"))
+                    .then(RequiredArgumentBuilder.<CommandSource, String>argument("target", StringArgumentType.word())
+                            .suggests(OfflineUserSuggestionProvider.create())
+                            .then(RequiredArgumentBuilder.<CommandSource, Double>argument("amount", DoubleArgumentType.doubleArg(1))
+                                    .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.pay"))
+                                    .executes(c -> {
+                                        execute(c);
+                                        return SINGLE_SUCCESS;
+                                    })))
+                            .build();
+        }
+
+        return builder()
+                .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.pay"))
+                .then(RequiredArgumentBuilder.<CommandSource, String>argument("target", StringArgumentType.word())
+                        .suggests(OfflineUserSuggestionProvider.create())
+                        .then(RequiredArgumentBuilder.<CommandSource, Integer>argument("amount", IntegerArgumentType.integer(1))
+                                .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.pay"))
+                                .executes(c -> {
+                                    execute(c);
+                                    return SINGLE_SUCCESS;
+                                })))
+                .build();
+    }
+}

common/src/main/java/dev/xhyrom/lighteco/common/commands/SetCommand.java

@@ -0,0 +1,107 @@
+package dev.xhyrom.lighteco.common.commands;
+
+import com.mojang.brigadier.arguments.DoubleArgumentType;
+import com.mojang.brigadier.arguments.IntegerArgumentType;
+import com.mojang.brigadier.arguments.StringArgumentType;
+import com.mojang.brigadier.builder.RequiredArgumentBuilder;
+import com.mojang.brigadier.context.CommandContext;
+import com.mojang.brigadier.tree.CommandNode;
+import dev.xhyrom.lighteco.api.exception.CannotBeGreaterThan;
+import dev.xhyrom.lighteco.common.command.CommandSource;
+import dev.xhyrom.lighteco.common.command.abstraction.Command;
+import dev.xhyrom.lighteco.common.command.argument.type.OfflineUserArgument;
+import dev.xhyrom.lighteco.common.command.suggestion.type.OfflineUserSuggestionProvider;
+import dev.xhyrom.lighteco.common.model.chat.CommandSender;
+import dev.xhyrom.lighteco.common.model.currency.Currency;
+import dev.xhyrom.lighteco.common.model.user.User;
+import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+import static com.mojang.brigadier.Command.SINGLE_SUCCESS;
+
+public class SetCommand extends Command {
+    private static final MiniMessage miniMessage = MiniMessage.miniMessage();
+    private final Currency currency;
+
+    public static SetCommand create(@NonNull Currency currency) {
+        return new SetCommand(currency);
+    }
+
+    public SetCommand(@NonNull Currency currency) {
+        super("set", "Set a player's balance");
+
+        this.currency = currency;
+    }
+
+    private void execute(CommandContext<CommandSource> context) {
+        final LightEcoPlugin plugin = context.getSource().plugin();
+        final CommandSender sender = context.getSource().sender();
+
+        final User target = OfflineUserArgument.getOfflineUser(context, "target");
+        if (target == null || target.getUsername() == null) {
+            return;
+        }
+
+        BigDecimal amount = BigDecimal.valueOf(currency.fractionalDigits() > 0
+                ? context.getArgument("amount", Double.class)
+                : context.getArgument("amount", Integer.class));
+
+        amount = amount.setScale(currency.fractionalDigits(), RoundingMode.DOWN);
+
+        try {
+            target.setBalance(currency, amount);
+        } catch (CannotBeGreaterThan e) {
+            sender.sendMessage(
+                    miniMessage.deserialize(
+                            this.getCurrencyMessageConfig(plugin, this.currency).cannotBeGreaterThan,
+                            Placeholder.parsed("max", plugin.getConfig().maximumBalance.toPlainString())
+                    )
+            );
+
+            return;
+        }
+
+        sender.sendMessage(
+                miniMessage.deserialize(
+                        this.getCurrencyMessageConfig(plugin, this.currency).set,
+                        Placeholder.parsed("currency", currency.getIdentifier()),
+                        Placeholder.parsed("target", target.getUsername()),
+                        Placeholder.parsed("amount", amount.toPlainString())
+                )
+        );
+    }
+
+    @Override
+    public CommandNode<CommandSource> build() {
+        if (currency.fractionalDigits() > 0) {
+            return builder()
+                    .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.set"))
+                    .then(RequiredArgumentBuilder.<CommandSource, String>argument("target", StringArgumentType.word())
+                            .suggests(OfflineUserSuggestionProvider.create())
+                            .then(RequiredArgumentBuilder.<CommandSource, Double>argument("amount", DoubleArgumentType.doubleArg(1))
+                                    .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.set"))
+                                    .executes(c -> {
+                                        execute(c);
+                                        return SINGLE_SUCCESS;
+                                    })))
+                            .build();
+        }
+
+        return builder()
+                .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.set"))
+                .then(RequiredArgumentBuilder.<CommandSource, String>argument("target", StringArgumentType.word())
+                        .suggests(OfflineUserSuggestionProvider.create())
+                        .then(RequiredArgumentBuilder.<CommandSource, Integer>argument("amount", IntegerArgumentType.integer(1))
+                                .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.set"))
+                                .executes(c -> {
+                                    execute(c);
+                                    return SINGLE_SUCCESS;
+                                })))
+                .build();
+    }
+}

common/src/main/java/dev/xhyrom/lighteco/common/commands/TakeCommand.java

@@ -0,0 +1,107 @@
+package dev.xhyrom.lighteco.common.commands;
+
+import com.mojang.brigadier.arguments.DoubleArgumentType;
+import com.mojang.brigadier.arguments.IntegerArgumentType;
+import com.mojang.brigadier.arguments.StringArgumentType;
+import com.mojang.brigadier.builder.RequiredArgumentBuilder;
+import com.mojang.brigadier.context.CommandContext;
+import com.mojang.brigadier.tree.CommandNode;
+import dev.xhyrom.lighteco.api.exception.CannotBeGreaterThan;
+import dev.xhyrom.lighteco.common.command.CommandSource;
+import dev.xhyrom.lighteco.common.command.abstraction.Command;
+import dev.xhyrom.lighteco.common.command.argument.type.OfflineUserArgument;
+import dev.xhyrom.lighteco.common.command.suggestion.type.OfflineUserSuggestionProvider;
+import dev.xhyrom.lighteco.common.model.chat.CommandSender;
+import dev.xhyrom.lighteco.common.model.currency.Currency;
+import dev.xhyrom.lighteco.common.model.user.User;
+import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+import static com.mojang.brigadier.Command.SINGLE_SUCCESS;
+
+public class TakeCommand extends Command {
+    private static final MiniMessage miniMessage = MiniMessage.miniMessage();
+    private final Currency currency;
+
+    public static TakeCommand create(@NonNull Currency currency) {
+        return new TakeCommand(currency);
+    }
+
+    public TakeCommand(@NonNull Currency currency) {
+        super("take", "Take money from a player");
+
+        this.currency = currency;
+    }
+
+    private void execute(CommandContext<CommandSource> context) {
+        final LightEcoPlugin plugin = context.getSource().plugin();
+        final CommandSender sender = context.getSource().sender();
+
+        final User target = OfflineUserArgument.getOfflineUser(context, "target");
+        if (target == null || target.getUsername() == null) {
+            return;
+        }
+
+        BigDecimal amount = BigDecimal.valueOf(currency.fractionalDigits() > 0
+                ? context.getArgument("amount", Double.class)
+                : context.getArgument("amount", Integer.class));
+
+        amount = amount.setScale(currency.fractionalDigits(), RoundingMode.DOWN);
+
+        try {
+            target.withdraw(currency, amount);
+        } catch (CannotBeGreaterThan e) {
+            sender.sendMessage(
+                    miniMessage.deserialize(
+                            this.getCurrencyMessageConfig(plugin, this.currency).cannotBeGreaterThan,
+                            Placeholder.parsed("max", plugin.getConfig().maximumBalance.toPlainString())
+                    )
+            );
+
+            return;
+        }
+
+        sender.sendMessage(
+                miniMessage.deserialize(
+                        this.getCurrencyMessageConfig(plugin, this.currency).set,
+                        Placeholder.parsed("currency", currency.getIdentifier()),
+                        Placeholder.parsed("target", target.getUsername()),
+                        Placeholder.parsed("amount", amount.toPlainString())
+                )
+        );
+    }
+
+    @Override
+    public CommandNode<CommandSource> build() {
+        if (currency.fractionalDigits() > 0) {
+            return builder()
+                    .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.take"))
+                    .then(RequiredArgumentBuilder.<CommandSource, String>argument("target", StringArgumentType.word())
+                            .suggests(OfflineUserSuggestionProvider.create())
+                            .then(RequiredArgumentBuilder.<CommandSource, Double>argument("amount", DoubleArgumentType.doubleArg(1))
+                                    .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.take"))
+                                    .executes(c -> {
+                                        execute(c);
+                                        return SINGLE_SUCCESS;
+                                    })))
+                            .build();
+        }
+
+        return builder()
+                .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.take"))
+                .then(RequiredArgumentBuilder.<CommandSource, String>argument("target", StringArgumentType.word())
+                        .suggests(OfflineUserSuggestionProvider.create())
+                        .then(RequiredArgumentBuilder.<CommandSource, Integer>argument("amount", IntegerArgumentType.integer(1))
+                                .requires((source) -> source.sender().eligible("lighteco.currency." + currency.getIdentifier() + ".command.take"))
+                                .executes(c -> {
+                                    execute(c);
+                                    return SINGLE_SUCCESS;
+                                })))
+                .build();
+    }
+}

common/src/main/java/dev/xhyrom/lighteco/common/model/chat/CommandSender.java

@@ -8,5 +8,6 @@ public interface CommandSender {
     String getUsername();
     UUID getUniqueId();
 
+    boolean eligible(String permission);
     void sendMessage(Component message);
 }