diff --git a/.gitignore b/.gitignore
index 1b80eab..45f7a83 100644
--- a/.gitignore
+++ b/.gitignore
@@ -108,8 +108,9 @@ ENV/
 .DS_Store
 .vscode/
 
-# pdm 
+# pdm
 .pdm-python
 
 # ruff
-.ruff_cache/*
\ No newline at end of file
+.ruff_cache/
+_verion.py
diff --git a/pyproject.toml b/pyproject.toml
index 010c824..b200765 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -67,6 +67,7 @@ include = [
   "tests/**/*.py",
   "tests/**/*.pyi"
 ]
+exclude = ["tests", "src/mantaray_py/_version.py"]
 
 [tool.ruff.lint]
 preview = true # preview features & checks, use with caution
@@ -177,9 +178,10 @@ post-install-commands = ["pre-commit install"]
 # Lint env dendencies
 [tool.hatch.envs.lint]
 dependencies = [
+  "pydantic",
   "mypy",
   "ruff",
-"deptry",
+  "deptry",
 ]
 
 
@@ -227,8 +229,7 @@ build-check = [
 [tool.hatch.envs.test]
 dependencies = [
   "pytest",
-"pytest-cov",
-
+  "pytest-cov",
 ]
 
 
@@ -255,4 +256,4 @@ exclude = [
 ]
 
 [tool.hatch.build.targets.wheel]
-packages = ["src/mantaray_py/"]
\ No newline at end of file
+packages = ["src/mantaray_py/"]
diff --git a/src/mantaray_py/__init__.py b/src/mantaray_py/__init__.py
index 1e3109e..0416264 100644
--- a/src/mantaray_py/__init__.py
+++ b/src/mantaray_py/__init__.py
@@ -3,8 +3,8 @@
 from importlib.metadata import PackageNotFoundError, version
 
 try:
-    __version__ = version("mantaray-py")
+    __version__ = version('mantaray-py')
 except PackageNotFoundError:  # pragma: no cover
-    __version__ = "unknown"
+    __version__ = 'unknown'
 finally:
     del version, PackageNotFoundError
diff --git a/src/mantaray_py/_version.py b/src/mantaray_py/_version.py
new file mode 100644
index 0000000..897f4f6
--- /dev/null
+++ b/src/mantaray_py/_version.py
@@ -0,0 +1,17 @@
+# file generated by setuptools_scm
+# don't change, don't track in version control
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from typing import Tuple, Union
+
+    VERSION_TUPLE = Tuple[Union[int, str], ...]
+else:
+    VERSION_TUPLE = object
+
+version: str
+__version__: str
+__version_tuple__: VERSION_TUPLE
+version_tuple: VERSION_TUPLE
+
+__version__ = version = '0.0.post1.dev1+ga17826a'
+__version_tuple__ = version_tuple = (0, 0, 'dev1', 'ga17826a')
diff --git a/src/mantaray_py/types/types.py b/src/mantaray_py/types/types.py
new file mode 100644
index 0000000..a1a912d
--- /dev/null
+++ b/src/mantaray_py/types/types.py
@@ -0,0 +1,51 @@
+from typing import Callable, Literal, Optional, Union
+
+from pydantic import BaseModel, conlist
+
+# Equivalent to the 'marshal_versionValues' and 'marshal_version' in TypeScript
+marshal_version_values = ('0.1', '0.2')
+marshal_version = Literal['0.1', '0.2']
+
+
+# Equivalent to the 'NodeType' enum in TypeScript
+class NodeType:
+    value = 2
+    edge = 4
+    with_path_separator = 8
+    with_metadata = 16
+    mask = 255
+
+
+# Custom type for Bytes with constrained length
+def create_bytes_type(length: int):
+    return conlist(int, min_items=length, max_items=length)
+
+
+Bytes32 = create_bytes_type(32)
+Bytes64 = create_bytes_type(64)
+Reference = Union[Bytes32, Bytes64]
+
+
+# Equivalent to the 'metadata_mapping' type in TypeScript
+metadata_mapping = dict[str, str]
+
+# Equivalent to the 'Storage_loader' and 'StorageSaver' in TypeScript
+Storage_loader = Callable[[Reference], bytes]
+Storage_saver = Callable[[bytes, Optional[dict]], Reference]
+
+
+# Equivalent to the 'StorageHandler' type in TypeScript
+class StorageHandler(BaseModel):
+    load: Storage_loader
+    save: Storage_saver
+
+
+# Example usage of the defined models and types
+class ExampleUsage(BaseModel):
+    version: marshal_version
+    reference: Reference
+    metadata: metadata_mapping
+    handler: StorageHandler
+
+    class Config:
+        arbitrary_types_allowed = True
diff --git a/tests/test_add.py b/tests/test_add.py
index f293f79..ea9b8a4 100644
--- a/tests/test_add.py
+++ b/tests/test_add.py
@@ -1,9 +1,10 @@
 import pytest
+
 from mantaray_py import add
 
 
 @pytest.mark.parametrize(
-    "a,b,result",
+    'a,b,result',
     [
         (0, 0, 0),
         (1, 1, 2),