diff --git a/api/src/main/java/com/instancify/scriptify/api/exception/ScriptException.java b/api/src/main/java/com/instancify/scriptify/api/exception/ScriptException.java
new file mode 100644
index 0000000..be11d99
--- /dev/null
+++ b/api/src/main/java/com/instancify/scriptify/api/exception/ScriptException.java
@@ -0,0 +1,35 @@
+package com.instancify.scriptify.api.exception;
+
+/**
+ * Custom exception for errors in script functions.
+ */
+public class ScriptException extends Exception {
+
+    /**
+     * Creates a new ScriptException with the specified message.
+     *
+     * @param message the detail message
+     */
+    public ScriptException(String message) {
+        super(message);
+    }
+
+    /**
+     * Creates a new ScriptException with the specified message and cause.
+     *
+     * @param message the detail message
+     * @param cause the cause of the exception
+     */
+    public ScriptException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    /**
+     * Creates a new ScriptException with the specified cause.
+     *
+     * @param cause the cause of the exception
+     */
+    public ScriptException(Throwable cause) {
+        super(cause);
+    }
+}
diff --git a/api/src/main/java/com/instancify/scriptify/api/exception/ScriptFunctionException.java b/api/src/main/java/com/instancify/scriptify/api/exception/ScriptFunctionException.java
index 6084628..7d1c5ca 100644
--- a/api/src/main/java/com/instancify/scriptify/api/exception/ScriptFunctionException.java
+++ b/api/src/main/java/com/instancify/scriptify/api/exception/ScriptFunctionException.java
@@ -3,7 +3,7 @@
 /**
  * Custom exception for errors in script functions.
  */
-public class ScriptFunctionException extends Exception {
+public class ScriptFunctionException extends ScriptException {
 
     /**
      * Creates a new ScriptFunctionException with the specified message.
diff --git a/api/src/main/java/com/instancify/scriptify/api/script/Script.java b/api/src/main/java/com/instancify/scriptify/api/script/Script.java
index cf0333d..0240a0b 100644
--- a/api/src/main/java/com/instancify/scriptify/api/script/Script.java
+++ b/api/src/main/java/com/instancify/scriptify/api/script/Script.java
@@ -1,12 +1,16 @@
 package com.instancify.scriptify.api.script;
 
+import com.instancify.scriptify.api.exception.ScriptException;
+import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.constant.ScriptConstantManager;
 import com.instancify.scriptify.api.script.function.ScriptFunctionManager;
 
 /**
  * Defines the structure of a script that can be executed.
+ *
+ * @param <T> Type of value returned by the script after evaluation
  */
-public interface Script {
+public interface Script<T> {
 
     /**
      * Retrieves the function manager associated with this script.
@@ -42,6 +46,8 @@ public interface Script {
 
     /**
      * Evaluates and executes this script.
+     *
+     * @throws ScriptFunctionException If there's an error during script evaluation
      */
-    void eval(String script);
+    T eval(String script) throws ScriptException;
 }
diff --git a/api/src/main/java/com/instancify/scriptify/api/script/constant/ScriptConstant.java b/api/src/main/java/com/instancify/scriptify/api/script/constant/ScriptConstant.java
index c1aeaf4..08cab7c 100644
--- a/api/src/main/java/com/instancify/scriptify/api/script/constant/ScriptConstant.java
+++ b/api/src/main/java/com/instancify/scriptify/api/script/constant/ScriptConstant.java
@@ -1,5 +1,8 @@
 package com.instancify.scriptify.api.script.constant;
 
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
 /**
  * Represents a constant that can be used within scripts.
  */
@@ -10,14 +13,14 @@ public interface ScriptConstant {
      *
      * @return The name of the constant
      */
-    String getName();
+    @NotNull String getName();
 
     /**
      * Gets the value of the constant.
      *
      * @return The value of the constant
      */
-    Object getValue();
+    @Nullable Object getValue();
 
     /**
      * Creates a new ScriptConstant instance with the given name and value.
@@ -29,7 +32,7 @@ public interface ScriptConstant {
     static ScriptConstant of(String name, Object value) {
         return new ScriptConstant() {
             @Override
-            public String getName() {
+            public @NotNull String getName() {
                 return name;
             }
 
diff --git a/api/src/main/java/com/instancify/scriptify/api/script/constant/ScriptConstantManager.java b/api/src/main/java/com/instancify/scriptify/api/script/constant/ScriptConstantManager.java
index d7fc9fb..0141ba1 100644
--- a/api/src/main/java/com/instancify/scriptify/api/script/constant/ScriptConstantManager.java
+++ b/api/src/main/java/com/instancify/scriptify/api/script/constant/ScriptConstantManager.java
@@ -1,5 +1,7 @@
 package com.instancify.scriptify.api.script.constant;
 
+import org.jetbrains.annotations.Nullable;
+
 import java.util.Map;
 
 /**
@@ -20,7 +22,7 @@ public interface ScriptConstantManager {
      * @param name The name of the constant to retrieve
      * @return The ScriptConstant associated with the name, or null if not found
      */
-    default ScriptConstant getConstant(String name) {
+    default @Nullable ScriptConstant getConstant(String name) {
         return this.getConstants().get(name);
     }
 
@@ -30,4 +32,11 @@ default ScriptConstant getConstant(String name) {
      * @param constant The constant to be registered
      */
     void register(ScriptConstant constant);
+
+    /**
+     * Removes an existing constant in the manager.
+     *
+     * @param name The name of the constant to remove
+     */
+    void remove(String name);
 }
diff --git a/api/src/main/java/com/instancify/scriptify/api/script/function/ScriptFunction.java b/api/src/main/java/com/instancify/scriptify/api/script/function/ScriptFunction.java
index cb746c0..a6c86b3 100644
--- a/api/src/main/java/com/instancify/scriptify/api/script/function/ScriptFunction.java
+++ b/api/src/main/java/com/instancify/scriptify/api/script/function/ScriptFunction.java
@@ -2,6 +2,9 @@
 
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 /**
  * Represents a function that can be used within scripts.
@@ -13,7 +16,7 @@ public interface ScriptFunction {
      *
      * @return The function's name
      */
-    String getName();
+    @NotNull String getName();
 
     /**
      * Invokes the function with the provided arguments.
@@ -23,5 +26,5 @@ public interface ScriptFunction {
      * @return The result of the function execution
      * @throws ScriptFunctionException If there's an error during invocation
      */
-    Object invoke(Script script, Object[] args) throws ScriptFunctionException;
+    @Nullable Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException;
 }
diff --git a/api/src/main/java/com/instancify/scriptify/api/script/function/ScriptFunctionManager.java b/api/src/main/java/com/instancify/scriptify/api/script/function/ScriptFunctionManager.java
index 2150a64..62cc0f9 100644
--- a/api/src/main/java/com/instancify/scriptify/api/script/function/ScriptFunctionManager.java
+++ b/api/src/main/java/com/instancify/scriptify/api/script/function/ScriptFunctionManager.java
@@ -1,5 +1,7 @@
 package com.instancify.scriptify.api.script.function;
 
+import org.jetbrains.annotations.Nullable;
+
 import java.util.Map;
 
 /**
@@ -20,7 +22,7 @@ public interface ScriptFunctionManager {
      * @param name The name of the function to retrieve
      * @return The ScriptFunction associated with the name, or null if not found
      */
-    default ScriptFunction getFunction(String name) {
+    default @Nullable ScriptFunction getFunction(String name) {
         return this.getFunctions().get(name);
     }
 
@@ -30,4 +32,11 @@ default ScriptFunction getFunction(String name) {
      * @param function The function to be registered
      */
     void register(ScriptFunction function);
+
+    /**
+     * Removes an existing function in the manager.
+     *
+     * @param name The name of the function to remove
+     */
+    void remove(String name);
 }
diff --git a/api/src/main/java/com/instancify/scriptify/api/script/function/argument/ScriptFunctionArgument.java b/api/src/main/java/com/instancify/scriptify/api/script/function/argument/ScriptFunctionArgument.java
new file mode 100644
index 0000000..43ed30f
--- /dev/null
+++ b/api/src/main/java/com/instancify/scriptify/api/script/function/argument/ScriptFunctionArgument.java
@@ -0,0 +1,55 @@
+package com.instancify.scriptify.api.script.function.argument;
+
+/**
+ * Represents an argument that can be passed to a script function.
+ */
+public interface ScriptFunctionArgument {
+
+    /**
+     * Retrieves the value of this argument.
+     *
+     * @return The value of the argument
+     */
+    Object getValue();
+
+    /**
+     * Retrieves type the of value of this argument.
+     *
+     * @return Type the value of the argument
+     */
+    default Class<?> getType() {
+        return this.getValue().getClass();
+    }
+
+    /**
+     * Checks if the value of this argument is an instance of the specified class.
+     *
+     * @param classOf The class to check against
+     * @return true if the value is an instance of the given class, false otherwise
+     */
+    default boolean is(Class<?> classOf) {
+        return classOf.isInstance(getValue());
+    }
+
+    /**
+     * Casts the value of this argument to the specified class type.
+     *
+     * @param <T> The type to cast to
+     * @param classOf The class representing the type to cast to
+     * @return The value cast to the specified type
+     * @throws ClassCastException if the value cannot be cast to the specified type
+     */
+    default <T> T as(Class<T> classOf) {
+        return classOf.cast(getValue());
+    }
+
+    /**
+     * Creates a new ScriptFunctionArgument with the given value.
+     *
+     * @param value The value to be wrapped as an argument
+     * @return A new ScriptFunctionArgument instance
+     */
+    static ScriptFunctionArgument of(Object value) {
+        return () -> value;
+    }
+}
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/constant/StandardConstantManager.java b/core/src/main/java/com/instancify/scriptify/core/script/constant/StandardConstantManager.java
index f3356b9..e889c42 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/constant/StandardConstantManager.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/constant/StandardConstantManager.java
@@ -24,6 +24,19 @@ public Map<String, ScriptConstant> getConstants() {
 
     @Override
     public void register(ScriptConstant constant) {
-        constants.put(constant.getName(), constant);
+        if (!constants.containsKey(constant.getName())) {
+            constants.put(constant.getName(), constant);
+        } else {
+            throw new IllegalStateException("The constant with this name already exists");
+        }
+    }
+
+    @Override
+    public void remove(String name) {
+        if (constants.containsKey(name)) {
+            constants.remove(name);
+        } else {
+            throw new IllegalArgumentException("The constant with this name does not exist");
+        }
     }
 }
\ No newline at end of file
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/constant/impl/ScriptConstantBaseDir.java b/core/src/main/java/com/instancify/scriptify/core/script/constant/impl/ScriptConstantBaseDir.java
index c43d6d3..f300d65 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/constant/impl/ScriptConstantBaseDir.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/constant/impl/ScriptConstantBaseDir.java
@@ -1,6 +1,7 @@
 package com.instancify.scriptify.core.script.constant.impl;
 
 import com.instancify.scriptify.api.script.constant.ScriptConstant;
+import org.jetbrains.annotations.NotNull;
 
 import java.nio.file.Paths;
 
@@ -10,7 +11,7 @@
 public class ScriptConstantBaseDir implements ScriptConstant {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "baseDir";
     }
 
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/constant/impl/ScriptConstantOsName.java b/core/src/main/java/com/instancify/scriptify/core/script/constant/impl/ScriptConstantOsName.java
index 1786fc8..63c659d 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/constant/impl/ScriptConstantOsName.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/constant/impl/ScriptConstantOsName.java
@@ -1,6 +1,7 @@
 package com.instancify.scriptify.core.script.constant.impl;
 
 import com.instancify.scriptify.api.script.constant.ScriptConstant;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * Represents a constant with os name
@@ -8,7 +9,7 @@
 public class ScriptConstantOsName implements ScriptConstant {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "osName";
     }
 
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/StandardFunctionManager.java b/core/src/main/java/com/instancify/scriptify/core/script/function/StandardFunctionManager.java
index 93db8ea..a241662 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/StandardFunctionManager.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/StandardFunctionManager.java
@@ -60,6 +60,19 @@ public Map<String, ScriptFunction> getFunctions() {
 
     @Override
     public void register(ScriptFunction function) {
-        functions.put(function.getName(), function);
+        if (!functions.containsKey(function.getName())) {
+            functions.put(function.getName(), function);
+        } else {
+            throw new IllegalStateException("The function with this name already exists");
+        }
+    }
+
+    @Override
+    public void remove(String name) {
+        if (functions.containsKey(name)) {
+            functions.remove(name);
+        } else {
+            throw new IllegalArgumentException("The function with this name does not exist");
+        }
     }
 }
\ No newline at end of file
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/ScriptFunctionPrint.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/ScriptFunctionPrint.java
index d9c7888..7da002e 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/ScriptFunctionPrint.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/ScriptFunctionPrint.java
@@ -2,6 +2,8 @@
 
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Arrays;
 import java.util.stream.Collectors;
@@ -12,13 +14,13 @@
 public class ScriptFunctionPrint implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "print";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) {
-        System.out.println(Arrays.stream(args).map(String::valueOf).collect(Collectors.joining(" ")));
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) {
+        System.out.println(Arrays.stream(args).map(arg -> arg.getValue().toString()).collect(Collectors.joining(" ")));
         return null;
     }
 }
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/ScriptFunctionShuffleArray.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/ScriptFunctionShuffleArray.java
index a33ffc1..9a86472 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/ScriptFunctionShuffleArray.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/ScriptFunctionShuffleArray.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -16,18 +18,18 @@
 public class ScriptFunctionShuffleArray implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "shuffleArray";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 1) {
             throw new ScriptFunctionArgsCountException(1, args.length);
         }
 
-        if (!(args[0] instanceof List<?> array)) {
-            throw new ScriptFunctionArgTypeException(List.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof List<?> array)) {
+            throw new ScriptFunctionArgTypeException(List.class, args[0].getType());
         }
 
         List<?> list = new ArrayList<Object>(array);
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionBase64Decode.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionBase64Decode.java
index 670a32e..274c166 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionBase64Decode.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionBase64Decode.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.nio.charset.StandardCharsets;
 import java.util.Base64;
@@ -14,17 +16,17 @@
  */
 public class ScriptFunctionBase64Decode implements ScriptFunction {
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "base64decode";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 1) {
             throw new ScriptFunctionArgsCountException(1, args.length);
         }
 
-        if (!(args[0] instanceof String str)) {
+        if (!(args[0].getValue() instanceof String str)) {
             throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
         }
 
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionBase64Encode.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionBase64Encode.java
index 425d431..7c30e0c 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionBase64Encode.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionBase64Encode.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Base64;
 
@@ -13,18 +15,18 @@
  */
 public class ScriptFunctionBase64Encode implements ScriptFunction {
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "base64encode";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 1) {
             throw new ScriptFunctionArgsCountException(1, args.length);
         }
 
-        if (!(args[0] instanceof String str)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof String str)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
         }
 
         return Base64.getEncoder().encodeToString(str.getBytes());
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionMD5.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionMD5.java
index 5a1dd0e..824f3b7 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionMD5.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionMD5.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.math.BigInteger;
 import java.nio.charset.StandardCharsets;
@@ -16,18 +18,18 @@
  */
 public class ScriptFunctionMD5 implements ScriptFunction {
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "md5";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 1) {
             throw new ScriptFunctionArgsCountException(1, args.length);
         }
 
-        if (!(args[0] instanceof String input)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof String input)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
         }
 
         try {
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionSHA256.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionSHA256.java
index ce14e97..08ac8b0 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionSHA256.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/crypto/ScriptFunctionSHA256.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.math.BigInteger;
 import java.nio.charset.StandardCharsets;
@@ -16,18 +18,18 @@
  */
 public class ScriptFunctionSHA256 implements ScriptFunction {
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "sha256";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 1) {
             throw new ScriptFunctionArgsCountException(1, args.length);
         }
 
-        if (!(args[0] instanceof String input)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof String input)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
         }
 
         try {
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionDeleteFile.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionDeleteFile.java
index 33418c4..0ded336 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionDeleteFile.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionDeleteFile.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 
@@ -14,25 +16,25 @@
 public class ScriptFunctionDeleteFile implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "deleteFile";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length > 2 || args.length < 1) {
             throw new ScriptFunctionArgsCountException(1, args.length);
         }
-        if (!(args[0] instanceof String filePath)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof String filePath)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
         }
 
         if (args.length == 1) {
             return new File(filePath).delete();
         }
 
-        if (!(args[1] instanceof Boolean recursive)) {
-            throw new ScriptFunctionArgTypeException(Boolean.class, args[1].getClass());
+        if (!(args[1].getValue() instanceof Boolean recursive)) {
+            throw new ScriptFunctionArgTypeException(Boolean.class, args[1].getType());
         }
 
         File file = new File(filePath);
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionDownloadFromUrl.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionDownloadFromUrl.java
index 8f1e226..d659cf1 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionDownloadFromUrl.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionDownloadFromUrl.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 import java.io.IOException;
@@ -18,21 +20,21 @@
 public class ScriptFunctionDownloadFromUrl implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "downloadFromUrl";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 2) {
             throw new ScriptFunctionArgsCountException(2, args.length);
         }
 
-        if (!(args[0] instanceof String url)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof String url)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
         }
-        if (!(args[1] instanceof String filePath)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[1].getClass());
+        if (!(args[1].getValue() instanceof String filePath)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[1].getType());
         }
 
         try (InputStream in = new URL(url).openStream()) {
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionExistsFile.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionExistsFile.java
index d6b55fe..41f5726 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionExistsFile.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionExistsFile.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -15,17 +17,17 @@
 public class ScriptFunctionExistsFile implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "existsFile";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length == 1) {
-            if (args[0] instanceof String filePath) {
+            if (args[0].getValue() instanceof String filePath) {
                 return Files.exists(Path.of(filePath));
             } else {
-                throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+                throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
             }
         } else {
             throw new ScriptFunctionArgsCountException(1, args.length);
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionJoinPath.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionJoinPath.java
index abb45a8..55ee2f8 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionJoinPath.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionJoinPath.java
@@ -4,6 +4,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * Represents a function to join path
@@ -11,22 +13,22 @@
 public class ScriptFunctionJoinPath implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "joinPath";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         String path = "";
-        for (Object arg : args) {
-            if (arg instanceof String segment) {
+        for (ScriptFunctionArgument arg : args) {
+            if (arg.getValue() instanceof String segment) {
                 if (path.isEmpty()) {
                     path += segment;
                 } else {
                     path += '/' + segment;
                 }
             } else {
-                throw new ScriptFunctionArgTypeException(String.class, args[1].getClass());
+                throw new ScriptFunctionArgTypeException(String.class, args[1].getType());
             }
         }
         return path;
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionListFiles.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionListFiles.java
index f87119c..14ceb6e 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionListFiles.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionListFiles.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 import java.nio.file.Paths;
@@ -16,14 +18,14 @@
 public class ScriptFunctionListFiles implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "listFiles";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length == 1) {
-            if (args[0] instanceof String filePath) {
+            if (args[0].getValue() instanceof String filePath) {
                 File folder = Paths.get(filePath).toAbsolutePath().toFile();
                 if (folder.isDirectory()) {
                     return Arrays.stream(folder.listFiles()).map(File::getAbsolutePath).toList();
@@ -31,7 +33,7 @@ public Object invoke(Script script, Object[] args) throws ScriptFunctionExceptio
                     throw new ScriptFunctionException("File is not a folder");
                 }
             } else {
-                throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+                throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
             }
         } else {
             throw new ScriptFunctionArgsCountException(1, args.length);
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionMoveFile.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionMoveFile.java
index c6c4149..3174c48 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionMoveFile.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionMoveFile.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 
@@ -14,21 +16,21 @@
 public class ScriptFunctionMoveFile implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "moveFile";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 2) {
             throw new ScriptFunctionArgsCountException(2, args.length);
         }
 
-        if (!(args[0] instanceof String originalFilePath)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof String originalFilePath)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
         }
-        if (!(args[1] instanceof String targetFilePath)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[1].getClass());
+        if (!(args[1].getValue() instanceof String targetFilePath)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[1].getType());
         }
 
         File fileToMove = new File(originalFilePath);
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionNormalizePath.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionNormalizePath.java
index 0aa0a56..890cd1c 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionNormalizePath.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionNormalizePath.java
@@ -5,22 +5,24 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 public class ScriptFunctionNormalizePath implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "normalizePath";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 1) {
             throw new ScriptFunctionArgsCountException(1, args.length);
         }
 
-        if (!(args[0] instanceof String path)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof String path)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
         }
 
         return path.replace('\\', '/');
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionReadFile.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionReadFile.java
index 73d4d25..7bc6261 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionReadFile.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionReadFile.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.IOException;
 import java.nio.file.Files;
@@ -16,21 +18,21 @@
 public class ScriptFunctionReadFile implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "readFile";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length == 1) {
-            if (args[0] instanceof String filePath) {
+            if (args[0].getValue() instanceof String filePath) {
                 try {
                     return Files.readString(Path.of(filePath));
                 } catch (IOException e) {
                     throw new ScriptFunctionException(e);
                 }
             } else {
-                throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+                throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
             }
         } else {
             throw new ScriptFunctionArgsCountException(1, args.length);
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionWriteFile.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionWriteFile.java
index 7f479b9..69c881d 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionWriteFile.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/file/ScriptFunctionWriteFile.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.IOException;
 import java.nio.file.Files;
@@ -16,21 +18,21 @@
 public class ScriptFunctionWriteFile implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "writeFile";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length == 2) {
-            if (args[0] instanceof String filePath && args[1] instanceof String fileContent) {
+            if (args[0].getValue() instanceof String filePath && args[1].getValue() instanceof String fileContent) {
                 try {
                     return Files.writeString(Path.of(filePath), fileContent);
                 } catch (IOException e) {
                     throw new ScriptFunctionException(e);
                 }
             } else {
-                throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+                throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
             }
         } else {
             throw new ScriptFunctionArgsCountException(2, args.length);
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/os/ScriptFunctionEnv.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/os/ScriptFunctionEnv.java
index c33334b..2d11365 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/os/ScriptFunctionEnv.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/os/ScriptFunctionEnv.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * Represents a function to get environment variable value
@@ -12,18 +14,18 @@
 public class ScriptFunctionEnv implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "env";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 1) {
             throw new ScriptFunctionArgsCountException(1, args.length);
         }
 
-        if (!(args[0] instanceof String name)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof String name)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
         }
 
         return System.getenv(name);
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/os/ScriptFunctionExecCommand.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/os/ScriptFunctionExecCommand.java
index 039942f..1a8c884 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/os/ScriptFunctionExecCommand.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/os/ScriptFunctionExecCommand.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.BufferedReader;
 import java.io.IOException;
@@ -16,18 +18,18 @@
 public class ScriptFunctionExecCommand implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "execCommand";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 1) {
             throw new ScriptFunctionArgsCountException(1, args.length);
         }
 
-        if (!(args[0] instanceof String input)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof String input)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
         }
         try {
             Process process = Runtime.getRuntime().exec(input);
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomDouble.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomDouble.java
index e478c62..3c7d8bc 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomDouble.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomDouble.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Random;
 
@@ -14,31 +16,31 @@
 public class ScriptFunctionRandomDouble implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "randomDouble";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         Random random = new Random();
         if (args.length > 2 || args.length < 1) throw new ScriptFunctionArgsCountException(1, args.length);
 
         if (args.length == 1) {
-            if (args[0] instanceof Number max) {
+            if (args[0].getValue() instanceof Number max) {
                 return random.nextDouble(max.doubleValue());
             } else {
-                throw new ScriptFunctionArgTypeException(Number.class, args[0].getClass());
+                throw new ScriptFunctionArgTypeException(Number.class, args[0].getType());
             }
         }
 
-        if (args[0] instanceof Number min) {
-            if (args[1] instanceof Number max) {
+        if (args[0].getValue() instanceof Number min) {
+            if (args[1].getValue() instanceof Number max) {
                 return random.nextDouble(max.doubleValue() - min.doubleValue()) + min.doubleValue();
             } else {
-                throw new ScriptFunctionArgTypeException(Number.class, args[1].getClass());
+                throw new ScriptFunctionArgTypeException(Number.class, args[1].getType());
             }
         } else {
-            throw new ScriptFunctionArgTypeException(Number.class, args[0].getClass());
+            throw new ScriptFunctionArgTypeException(Number.class, args[0].getType());
         }
     }
 }
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomFloat.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomFloat.java
index 631fa32..7201231 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomFloat.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomFloat.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Random;
 
@@ -14,31 +16,31 @@
 public class ScriptFunctionRandomFloat implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "randomFloat";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         Random random = new Random();
         if (args.length > 2 || args.length < 1) throw new ScriptFunctionArgsCountException(1, args.length);
 
         if (args.length == 1) {
-            if (args[0] instanceof Number max) {
+            if (args[0].getValue() instanceof Number max) {
                 return random.nextFloat(max.floatValue());
             } else {
-                throw new ScriptFunctionArgTypeException(Number.class, args[0].getClass());
+                throw new ScriptFunctionArgTypeException(Number.class, args[0].getType());
             }
         }
 
-        if (args[0] instanceof Number min) {
-            if (args[1] instanceof Number max) {
+        if (args[0].getValue() instanceof Number min) {
+            if (args[1].getValue() instanceof Number max) {
                 return random.nextFloat(max.floatValue() - min.floatValue()) + min.floatValue();
             } else {
-                throw new ScriptFunctionArgTypeException(Number.class, args[1].getClass());
+                throw new ScriptFunctionArgTypeException(Number.class, args[1].getType());
             }
         } else {
-            throw new ScriptFunctionArgTypeException(Number.class, args[0].getClass());
+            throw new ScriptFunctionArgTypeException(Number.class, args[0].getType());
         }
     }
 }
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomInteger.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomInteger.java
index 0ee82de..a7c4ab8 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomInteger.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomInteger.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Random;
 
@@ -14,31 +16,31 @@
 public class ScriptFunctionRandomInteger implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "randomInt";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         Random random = new Random();
         if (args.length > 2 || args.length < 1) throw new ScriptFunctionArgsCountException(1, args.length);
 
         if (args.length == 1) {
-            if (args[0] instanceof Number max) {
+            if (args[0].getValue() instanceof Number max) {
                 return random.nextInt(max.intValue());
             } else {
-                throw new ScriptFunctionArgTypeException(Number.class, args[0].getClass());
+                throw new ScriptFunctionArgTypeException(Number.class, args[0].getType());
             }
         }
 
-        if (args[0] instanceof Number min) {
-            if (args[1] instanceof Number max) {
+        if (args[0].getValue() instanceof Number min) {
+            if (args[1].getValue() instanceof Number max) {
                 return random.nextInt(max.intValue() - min.intValue()) + min.intValue();
             } else {
-                throw new ScriptFunctionArgTypeException(Number.class, args[1].getClass());
+                throw new ScriptFunctionArgTypeException(Number.class, args[1].getType());
             }
         } else {
-            throw new ScriptFunctionArgTypeException(Number.class, args[0].getClass());
+            throw new ScriptFunctionArgTypeException(Number.class, args[0].getType());
         }
     }
 }
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomLong.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomLong.java
index 7823c14..123555f 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomLong.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomLong.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Random;
 
@@ -14,31 +16,31 @@
 public class ScriptFunctionRandomLong implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "randomLong";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         Random random = new Random();
         if (args.length > 2 || args.length < 1) throw new ScriptFunctionArgsCountException(1, args.length);
 
         if (args.length == 1) {
-            if (args[0] instanceof Number max) {
+            if (args[0].getValue() instanceof Number max) {
                 return random.nextLong(max.longValue());
             } else {
-                throw new ScriptFunctionArgTypeException(Number.class, args[0].getClass());
+                throw new ScriptFunctionArgTypeException(Number.class, args[0].getType());
             }
         }
 
-        if (args[0] instanceof Number min) {
-            if (args[1] instanceof Number max) {
+        if (args[0].getValue() instanceof Number min) {
+            if (args[1].getValue() instanceof Number max) {
                 return random.nextLong(max.longValue() - min.longValue()) + min.longValue();
             } else {
-                throw new ScriptFunctionArgTypeException(Number.class, args[1].getClass());
+                throw new ScriptFunctionArgTypeException(Number.class, args[1].getType());
             }
         } else {
-            throw new ScriptFunctionArgTypeException(Number.class, args[0].getClass());
+            throw new ScriptFunctionArgTypeException(Number.class, args[0].getType());
         }
     }
 }
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomUUID.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomUUID.java
index 8329e12..34762b9 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomUUID.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/random/ScriptFunctionRandomUUID.java
@@ -3,6 +3,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.UUID;
 
@@ -12,12 +14,12 @@
 public class ScriptFunctionRandomUUID implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "randomUUID";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         return UUID.randomUUID().toString();
     }
 }
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionSmartUnzipFile.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionSmartUnzipFile.java
index 8c275aa..a3fc5f2 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionSmartUnzipFile.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionSmartUnzipFile.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 import java.io.FileInputStream;
@@ -21,24 +23,24 @@
 public class ScriptFunctionSmartUnzipFile implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "smartUnzipFile";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 3) {
             throw new ScriptFunctionArgsCountException(3, args.length);
         }
 
-        if (!(args[0] instanceof String compressedFilePath)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof String compressedFilePath)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
         }
-        if (!(args[1] instanceof String decompressedPath)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[1].getClass());
+        if (!(args[1].getValue() instanceof String decompressedPath)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[1].getType());
         }
-        if (!(args[2] instanceof List<?> patterns)) {
-            throw new ScriptFunctionArgTypeException(List.class, args[2].getClass());
+        if (!(args[2].getValue() instanceof List<?> patterns)) {
+            throw new ScriptFunctionArgTypeException(List.class, args[2].getType());
         }
 
         try {
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionSmartZipFile.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionSmartZipFile.java
index d88781e..c658a6f 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionSmartZipFile.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionSmartZipFile.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 import java.io.FileInputStream;
@@ -21,24 +23,24 @@
 public class ScriptFunctionSmartZipFile implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "smartZipFile";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 3) {
             throw new ScriptFunctionArgsCountException(3, args.length);
         }
 
-        if (!(args[0] instanceof String filesPath)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof String filesPath)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
         }
-        if (!(args[1] instanceof String compressedFilePath)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[1].getClass());
+        if (!(args[1].getValue() instanceof String compressedFilePath)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[1].getType());
         }
-        if (!(args[2] instanceof List<?> patterns)) {
-            throw new ScriptFunctionArgTypeException(List.class, args[2].getClass());
+        if (!(args[2].getValue() instanceof List<?> patterns)) {
+            throw new ScriptFunctionArgTypeException(List.class, args[2].getType());
         }
 
         try {
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionUnzipFile.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionUnzipFile.java
index 65333f7..60f6580 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionUnzipFile.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionUnzipFile.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 import java.io.FileInputStream;
@@ -19,21 +21,21 @@
 public class ScriptFunctionUnzipFile implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "unzipFile";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 2) {
             throw new ScriptFunctionArgsCountException(2, args.length);
         }
 
-        if (!(args[0] instanceof String compressedFilePath)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof String compressedFilePath)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
         }
-        if (!(args[1] instanceof String decompressedPath)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[1].getClass());
+        if (!(args[1].getValue() instanceof String decompressedPath)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[1].getType());
         }
 
         try {
diff --git a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionZipFile.java b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionZipFile.java
index c41026e..f93cb86 100644
--- a/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionZipFile.java
+++ b/core/src/main/java/com/instancify/scriptify/core/script/function/impl/zip/ScriptFunctionZipFile.java
@@ -5,6 +5,8 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 import java.io.FileInputStream;
@@ -19,21 +21,21 @@
 public class ScriptFunctionZipFile implements ScriptFunction {
 
     @Override
-    public String getName() {
+    public @NotNull String getName() {
         return "zipFile";
     }
 
     @Override
-    public Object invoke(Script script, Object[] args) throws ScriptFunctionException {
+    public Object invoke(Script<?> script, ScriptFunctionArgument[] args) throws ScriptFunctionException {
         if (args.length != 2) {
             throw new ScriptFunctionArgsCountException(2, args.length);
         }
 
-        if (!(args[0] instanceof String filePath)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[0].getClass());
+        if (!(args[0].getValue() instanceof String filePath)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[0].getType());
         }
-        if (!(args[1] instanceof String compressedFilePath)) {
-            throw new ScriptFunctionArgTypeException(String.class, args[1].getClass());
+        if (!(args[1].getValue() instanceof String compressedFilePath)) {
+            throw new ScriptFunctionArgTypeException(String.class, args[1].getType());
         }
 
         try {
diff --git a/script-js-graalvm/src/main/java/com/instancify/scriptify/script/JsFunction.java b/script-js-graalvm/src/main/java/com/instancify/scriptify/script/JsFunction.java
index 7646ed7..5e344e4 100644
--- a/script-js-graalvm/src/main/java/com/instancify/scriptify/script/JsFunction.java
+++ b/script-js-graalvm/src/main/java/com/instancify/scriptify/script/JsFunction.java
@@ -3,24 +3,25 @@
 import com.instancify.scriptify.api.exception.ScriptFunctionException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
 import org.graalvm.polyglot.proxy.ProxyExecutable;
 import org.graalvm.polyglot.Value;
 
 public class JsFunction implements ProxyExecutable {
 
-    private final Script script;
+    private final Script<?> script;
     private final ScriptFunction function;
 
-    public JsFunction(Script script, ScriptFunction function) {
+    public JsFunction(Script<?> script, ScriptFunction function) {
         this.script = script;
         this.function = function;
     }
 
     @Override
     public Object execute(Value... arguments) {
-        Object[] args = new Object[arguments.length];
+        ScriptFunctionArgument[] args = new ScriptFunctionArgument[arguments.length];
         for (int i = 0; i < arguments.length; i++) {
-            args[i] = arguments[i].as(Object.class);
+            args[i] = ScriptFunctionArgument.of(arguments[i].as(Object.class));
         }
         try {
             return function.invoke(script, args);
diff --git a/script-js-graalvm/src/main/java/com/instancify/scriptify/script/JsScript.java b/script-js-graalvm/src/main/java/com/instancify/scriptify/script/JsScript.java
index 9f3b06a..8801278 100644
--- a/script-js-graalvm/src/main/java/com/instancify/scriptify/script/JsScript.java
+++ b/script-js-graalvm/src/main/java/com/instancify/scriptify/script/JsScript.java
@@ -1,5 +1,6 @@
 package com.instancify.scriptify.script;
 
+import com.instancify.scriptify.api.exception.ScriptException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.constant.ScriptConstant;
 import com.instancify.scriptify.api.script.constant.ScriptConstantManager;
@@ -7,7 +8,7 @@
 import com.instancify.scriptify.api.script.function.ScriptFunctionManager;
 import org.graalvm.polyglot.*;
 
-public class JsScript implements Script {
+public class JsScript implements Script<Value> {
 
     private final Context context = Context.create();
     private ScriptFunctionManager functionManager;
@@ -34,7 +35,7 @@ public void setConstantManager(ScriptConstantManager constantManager) {
     }
 
     @Override
-    public void eval(String script) {
+    public Value eval(String script) throws ScriptException {
         Value bindings = context.getBindings("js");
 
         if (functionManager != null) {
@@ -49,6 +50,10 @@ public void eval(String script) {
             }
         }
 
-        context.eval("js", script);
+        try {
+            return context.eval("js", script);
+        } catch (Exception e) {
+            throw new ScriptException(e);
+        }
     }
 }
diff --git a/script-js-rhino/build.gradle.kts b/script-js-rhino/build.gradle.kts
index 9b9455c..0e1519b 100644
--- a/script-js-rhino/build.gradle.kts
+++ b/script-js-rhino/build.gradle.kts
@@ -8,5 +8,5 @@ repositories {
 
 dependencies {
     api(project(":core"))
-    api("org.mozilla:rhino:1.7.15")
+    api("org.mozilla:rhino:1.8.0")
 }
\ No newline at end of file
diff --git a/script-js-rhino/src/main/java/com/instancify/scriptify/script/JsFunction.java b/script-js-rhino/src/main/java/com/instancify/scriptify/script/JsFunction.java
index 899537a..2fc0c75 100644
--- a/script-js-rhino/src/main/java/com/instancify/scriptify/script/JsFunction.java
+++ b/script-js-rhino/src/main/java/com/instancify/scriptify/script/JsFunction.java
@@ -2,6 +2,7 @@
 
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.function.ScriptFunction;
+import com.instancify.scriptify.api.script.function.argument.ScriptFunctionArgument;
 import org.mozilla.javascript.Context;
 import org.mozilla.javascript.Function;
 import org.mozilla.javascript.Scriptable;
@@ -17,7 +18,11 @@ public JsFunction(Script script, ScriptFunction function) {
     }
 
     @Override
-    public Object call(Context context, Scriptable scriptable, Scriptable scriptable1, Object[] args) {
+    public Object call(Context context, Scriptable scriptable, Scriptable scriptable1, Object[] arguments) {
+        ScriptFunctionArgument[] args = new ScriptFunctionArgument[arguments.length];
+        for (int i = 0; i < arguments.length; i++) {
+            args[i] = ScriptFunctionArgument.of(arguments[i]);
+        }
         try {
             return function.invoke(script, args);
         } catch (Exception e) {
diff --git a/script-js-rhino/src/main/java/com/instancify/scriptify/script/JsScript.java b/script-js-rhino/src/main/java/com/instancify/scriptify/script/JsScript.java
index 3ef0c9e..5175383 100644
--- a/script-js-rhino/src/main/java/com/instancify/scriptify/script/JsScript.java
+++ b/script-js-rhino/src/main/java/com/instancify/scriptify/script/JsScript.java
@@ -1,5 +1,6 @@
 package com.instancify.scriptify.script;
 
+import com.instancify.scriptify.api.exception.ScriptException;
 import com.instancify.scriptify.api.script.Script;
 import com.instancify.scriptify.api.script.constant.ScriptConstant;
 import com.instancify.scriptify.api.script.constant.ScriptConstantManager;
@@ -8,7 +9,7 @@
 import org.mozilla.javascript.Context;
 import org.mozilla.javascript.ScriptableObject;
 
-public class JsScript implements Script {
+public class JsScript implements Script<Object> {
 
     private final Context context = Context.enter();
     private final ScriptableObject scope = context.initStandardObjects();
@@ -36,7 +37,7 @@ public void setConstantManager(ScriptConstantManager constantManager) {
     }
 
     @Override
-    public void eval(String script) {
+    public Object eval(String script) throws ScriptException {
         if (functionManager != null) {
             for (ScriptFunction function : functionManager.getFunctions().values()) {
                 scope.put(function.getName(), scope, new JsFunction(this, function));
@@ -49,6 +50,10 @@ public void eval(String script) {
             }
         }
 
-        context.evaluateString(scope, script, null, 1, null);
+        try {
+            return context.evaluateString(scope, script, null, 1, null);
+        } catch (Exception e) {
+            throw new ScriptException(e);
+        }
     }
 }