diff --git a/include/wrapping_dap_chain_common.h b/include/wrapping_dap_chain_common.h
new file mode 100644
index 0000000000000000000000000000000000000000..63bd7845711d774a4c8c3daf5b7a704574a558a4
--- /dev/null
+++ b/include/wrapping_dap_chain_common.h
@@ -0,0 +1,190 @@
+#ifndef _WRAPPING_DAP_CHAIN_COMMON_
+#define _WRAPPING_DAP_CHAIN_COMMON_
+#include <Python.h>
+#include "dap_chain_common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Chain hash slow */
+typedef struct PyDapChainHashSlow{
+ PyObject_HEAD
+ dap_chain_hash_slow_t *hash_slow;
+}PyDapChainHashSlowObject;
+
+PyObject *dap_chain_hash_slow_to_str_py(PyObject *self, PyObject *args);
+
+PyMethodDef DapChainHashSlowMethod[] = {
+ {"toStr", (PyCFunction)dap_chain_hash_slow_to_str_py, METH_VARARGS, ""},
+ {NULL, NULL, 0, NULL}
+};
+
+static PyTypeObject DapChainHashSlowObject_DapChainHashSlowObjectType = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "CellFrame.Chain.HashSlow", /* tp_name */
+ sizeof(PyDapChainHashSlowObject),/* tp_basicsize */
+ 0, /* tp_itemsize */
+ 0, /* tp_dealloc */
+ 0, /* tp_print */
+ 0, /* tp_getattr */
+ 0, /* tp_setattr */
+ 0, /* tp_reserved */
+ 0, /* tp_repr */
+ 0, /* tp_as_number */
+ 0, /* tp_as_sequence */
+ 0, /* tp_as_mapping */
+ 0, /* tp_hash */
+ 0, /* tp_call */
+ 0, /* tp_str */
+ 0, /* tp_getattro */
+ 0, /* tp_setattro */
+ 0, /* tp_as_buffer */
+ Py_TPFLAGS_DEFAULT |
+ Py_TPFLAGS_BASETYPE, /* tp_flags */
+ "Chain hash slow object", /* tp_doc */
+ 0, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
+ DapChainHashSlowMethod, /* tp_methods */
+ 0, /* tp_members */
+ 0, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ 0, /* tp_init */
+ 0, /* tp_alloc */
+ PyType_GenericNew, /* tp_new */
+};
+
+
+/*=================*/
+
+/* Chain addr */
+typedef struct PyDapChainAddr{
+ PyObject_HEAD
+ dap_chain_addr_t *addr;
+}PyDapChainAddrObject;
+
+PyObject *dap_chain_addr_to_str_py(PyObject *self, PyObject *args);
+PyObject *dap_chain_addr_from_str_py(PyObject *self, PyObject *args);
+
+PyMethodDef DapChainAddrMethods[] = {
+ {"toStr", (PyCFunction)dap_chain_addr_to_str_py, METH_VARARGS, ""},
+ {"fromStr", (PyCFunction)dap_chain_addr_from_str_py, METH_VARARGS, ""},
+ {NULL, NULL, 0, NULL}
+};
+
+static PyTypeObject DapChainAddrObject_DapChainAddrObjectType = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "CellFrame.Chain.Addr", /* tp_name */
+ sizeof(PyDapChainAddrObject),/* tp_basicsize */
+ 0, /* tp_itemsize */
+ 0, /* tp_dealloc */
+ 0, /* tp_print */
+ 0, /* tp_getattr */
+ 0, /* tp_setattr */
+ 0, /* tp_reserved */
+ 0, /* tp_repr */
+ 0, /* tp_as_number */
+ 0, /* tp_as_sequence */
+ 0, /* tp_as_mapping */
+ 0, /* tp_hash */
+ 0, /* tp_call */
+ 0, /* tp_str */
+ 0, /* tp_getattro */
+ 0, /* tp_setattro */
+ 0, /* tp_as_buffer */
+ Py_TPFLAGS_DEFAULT |
+ Py_TPFLAGS_BASETYPE, /* tp_flags */
+ "Chain addr object", /* tp_doc */
+ 0, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
+ DapChainAddrMethods, /* tp_methods */
+ 0, /* tp_members */
+ 0, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ 0, /* tp_init */
+ 0, /* tp_alloc */
+ PyType_GenericNew, /* tp_new */
+};
+
+
+/*=================*/
+
+/* Chain net id */
+
+typedef struct PyDapChainNetId{
+ PyObject_HEAD
+ dap_chain_net_id_t net_id;
+}PyDapChainNetIdObject;
+
+PyObject *dap_chain_net_id_from_str_py(PyObject *self, PyObject *args);
+
+PyMethodDef DapChainNetIdObject[] = {
+ {"fromStr", (PyCFunction)dap_chain_net_id_from_str_py, METH_VARARGS, ""},
+ {NULL, NULL, 0, NULL}
+};
+
+static PyTypeObject DapChainNetIdObject_DapChainNetIdObjectType = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "CellFrame.Chain.NetID", /* tp_name */
+ sizeof(PyDapChainNetIdObject), /* tp_basicsize */
+ 0, /* tp_itemsize */
+ 0, /* tp_dealloc */
+ 0, /* tp_print */
+ 0, /* tp_getattr */
+ 0, /* tp_setattr */
+ 0, /* tp_reserved */
+ 0, /* tp_repr */
+ 0, /* tp_as_number */
+ 0, /* tp_as_sequence */
+ 0, /* tp_as_mapping */
+ 0, /* tp_hash */
+ 0, /* tp_call */
+ 0, /* tp_str */
+ 0, /* tp_getattro */
+ 0, /* tp_setattro */
+ 0, /* tp_as_buffer */
+ Py_TPFLAGS_DEFAULT |
+ Py_TPFLAGS_BASETYPE, /* tp_flags */
+ "Chain net id object", /* tp_doc */
+ 0, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
+ 0, /* tp_methods */
+ 0, /* tp_members */
+ 0, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ 0, /* tp_init */
+ 0, /* tp_alloc */
+ PyType_GenericNew, /* tp_new */
+};
+
+/*=================*/
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif //_WRAPPING_DAP_CHAIN_COMMON_
diff --git a/src/wrapping_dap_chain_common.c b/src/wrapping_dap_chain_common.c
new file mode 100644
index 0000000000000000000000000000000000000000..c70f73fe2040ce37d858dcd2082dd186a8c21adf
--- /dev/null
+++ b/src/wrapping_dap_chain_common.c
@@ -0,0 +1,38 @@
+#include "wrapping_dap_chain_common.h"
+
+PyObject *dap_chain_hash_slow_to_str_py(PyObject *self, PyObject *args){
+ PyObject *obj_hash_slow;
+ char *str;
+ size_t str_max;
+ if (!PyArg_ParseTuple(args, "O|s|n", &obj_hash_slow, &str, &str_max))
+ return NULL;
+ size_t res = dap_chain_hash_slow_to_str(((PyDapChainHashSlowObject*)obj_hash_slow)->hash_slow, str, str_max);
+ return Py_BuildValue("ns", res, str_max);
+}
+
+PyObject *dap_chain_addr_to_str_py(PyObject *self, PyObject *args){
+ PyObject *obj_chain_addr;
+ if (!PyArg_ParseTuple(args, "O", &obj_chain_addr))
+ return NULL;
+ const dap_chain_addr_t *addr = ((PyDapChainAddrObject*)obj_chain_addr)->addr;
+ char *res = dap_chain_addr_to_str(addr);
+ return Py_BuildValue("s", res);
+}
+
+PyObject *dap_chain_addr_from_str_py(PyObject *self, PyObject *args){
+ const char *str;
+ if (!PyArg_ParseTuple(args, "s", &str))
+ return NULL;
+ PyObject *obj = _PyObject_New(&DapChainAddrObject_DapChainAddrObjectType);
+ ((PyDapChainAddrObject*)obj)->addr = dap_chain_addr_from_str(str);
+ return Py_BuildValue("O", obj);
+}
+
+PyObject *dap_chain_net_id_from_str_py(PyObject *self, PyObject *args){
+ const char *str;
+ if (!PyArg_ParseTuple(args, "s", &str))
+ return NULL;
+ PyObject *obj_net_id = _PyObject_New(&DapChainNetIdObject_DapChainNetIdObjectType);
+ ((PyDapChainNetIdObject*)obj_net_id)->net_id = dap_chain_net_id_from_str(str);
+ return Py_BuildValue("O", obj_net_id);
+}