diff --git a/abonapp/migrations/0001_initial.py b/abonapp/migrations/0001_initial.py
index 2877a67..e929df1 100644
--- a/abonapp/migrations/0001_initial.py
+++ b/abonapp/migrations/0001_initial.py
@@ -7,7 +7,7 @@ from django.conf import settings
 import django.core.validators
 from django.db import migrations, models
 import django.db.models.deletion
-import mydefs
+from djing import lib
 import re
 
 
@@ -30,7 +30,7 @@ class Migration(migrations.Migration):
                  models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True,
                                       primary_key=True, serialize=False, to='accounts_app.BaseAccount')),
                 ('ballance', models.FloatField(default=0.0)),
-                ('ip_address', mydefs.MyGenericIPAddressField(blank=True, max_length=8, null=True, protocol='ipv4')),
+                ('ip_address', lib.MyGenericIPAddressField(blank=True, max_length=8, null=True, protocol='ipv4')),
                 ('description', models.TextField(blank=True, null=True, verbose_name='Comment')),
                 ('house', models.CharField(blank=True, max_length=12, null=True, verbose_name='House')),
                 ('is_dynamic_ip', models.BooleanField(default=False)),
diff --git a/abonapp/models.py b/abonapp/models.py
index 6cf8e74..650f226 100644
--- a/abonapp/models.py
+++ b/abonapp/models.py
@@ -14,7 +14,7 @@ from django.utils.translation import ugettext_lazy as _, gettext
 from accounts_app.models import UserProfile, MyUserManager, BaseAccount
 from agent import Transmitter, AbonStruct, TariffStruct, NasFailedResult, NasNetworkError
 from group_app.models import Group
-from mydefs import MyGenericIPAddressField, ip2int, LogicError
+from djing.lib import ip2int, MyGenericIPAddressField, LogicError
 from djing import IP_ADDR_REGEX
 from tariff_app.models import Tariff, PeriodicPay
 from bitfield import BitField
diff --git a/abonapp/pay_systems.py b/abonapp/pay_systems.py
index 90b025d..6fe737e 100644
--- a/abonapp/pay_systems.py
+++ b/abonapp/pay_systems.py
@@ -1,6 +1,6 @@
 from hashlib import md5
 from django.utils import timezone
-from mydefs import safe_int, safe_float
+from djing.lib import safe_int, safe_float
 from .models import Abon, AllTimePayLog
 from django.db import DatabaseError
 from django.conf import settings
diff --git a/abonapp/views.py b/abonapp/views.py
index 5139d2a..5a36b85 100644
--- a/abonapp/views.py
+++ b/abonapp/views.py
@@ -20,7 +20,6 @@ from tariff_app.models import Tariff
 from agent import NasFailedResult, Transmitter, NasNetworkError
 from . import forms
 from . import models
-import mydefs
 from devapp.models import Device, Port as DevPort
 from datetime import datetime, date, timedelta
 from taskapp.models import Task
@@ -30,6 +29,7 @@ from group_app.models import Group
 from guardian.shortcuts import get_objects_for_user, assign_perm
 from guardian.decorators import permission_required_or_403 as permission_required
 from djing import ping
+from djing import lib
 from djing.global_base_views import OrderingMixin, BaseListWithFiltering, SecureApiView
 
 PAGINATION_ITEMS_PER_PAGE = getattr(settings, 'PAGINATION_ITEMS_PER_PAGE', 10)
@@ -40,14 +40,14 @@ class BaseAbonListView(OrderingMixin, BaseListWithFiltering):
     http_method_names = ('get',)
 
 
-@method_decorator((login_required, mydefs.only_admins), name='dispatch')
+@method_decorator((login_required, lib.only_admins), name='dispatch')
 class PeoplesListView(BaseAbonListView):
     context_object_name = 'peoples'
     template_name = 'abonapp/peoples.html'
 
     def get_queryset(self):
-        street_id = mydefs.safe_int(self.request.GET.get('street'))
-        gid = mydefs.safe_int(self.kwargs.get('gid'))
+        street_id = lib.safe_int(self.request.GET.get('street'))
+        gid = lib.safe_int(self.kwargs.get('gid'))
         peoples_list = models.Abon.objects.all().select_related('group', 'street', 'current_tariff')
         if street_id > 0:
             peoples_list = peoples_list.filter(group__pk=gid, street=street_id)
@@ -61,7 +61,7 @@ class PeoplesListView(BaseAbonListView):
                         abon.stat_cache = StatCache.objects.get(ip=abon.ip_address)
                     except StatCache.DoesNotExist:
                         pass
-        except mydefs.LogicError as e:
+        except lib.LogicError as e:
             messages.warning(self.request, e)
         ordering = self.get_ordering()
         if ordering and isinstance(ordering, str):
@@ -70,7 +70,7 @@ class PeoplesListView(BaseAbonListView):
         return peoples_list
 
     def get_context_data(self, **kwargs):
-        gid = mydefs.safe_int(self.kwargs.get('gid'))
+        gid = lib.safe_int(self.kwargs.get('gid'))
         if gid < 1:
             return HttpResponseBadRequest('group id is broken')
         group = get_object_or_404(Group, pk=gid)
@@ -80,12 +80,12 @@ class PeoplesListView(BaseAbonListView):
         context = super(PeoplesListView, self).get_context_data(**kwargs)
 
         context['streets'] = models.AbonStreet.objects.filter(group=gid)
-        context['street_id'] = mydefs.safe_int(self.request.GET.get('street'))
+        context['street_id'] = lib.safe_int(self.request.GET.get('street'))
         context['group'] = group
         return context
 
 
-@method_decorator((login_required, mydefs.only_admins), name='dispatch')
+@method_decorator((login_required, lib.only_admins), name='dispatch')
 class GroupListView(BaseAbonListView):
     context_object_name = 'groups'
     template_name = 'abonapp/group_list.html'
@@ -98,7 +98,7 @@ class GroupListView(BaseAbonListView):
         return queryset
 
 
-@method_decorator((login_required, mydefs.only_admins), name='dispatch')
+@method_decorator((login_required, lib.only_admins), name='dispatch')
 @method_decorator(permission_required('abonapp.add_abon'), name='dispatch')
 class AbonCreateView(CreateView):
     group = None
@@ -142,9 +142,9 @@ class AbonCreateView(CreateView):
             messages.success(self.request, _('create abon success msg'))
             self.abon = abon
             return super(AbonCreateView, self).form_valid(form)
-        except (IntegrityError, NasFailedResult, NasNetworkError, mydefs.LogicError) as e:
+        except (IntegrityError, NasFailedResult, NasNetworkError, lib.LogicError) as e:
             messages.error(self.request, e)
-        except mydefs.MultipleException as errs:
+        except lib.MultipleException as errs:
             for err in errs.err_list:
                 messages.error(self.request, err)
         return self.render_to_response(self.get_context_data(form=form))
@@ -154,7 +154,7 @@ class AbonCreateView(CreateView):
         return super(AbonCreateView, self).form_invalid(form)
 
 
-@method_decorator((login_required, mydefs.only_admins), name='dispatch')
+@method_decorator((login_required, lib.only_admins), name='dispatch')
 @method_decorator(permission_required('abonapp.delete_abon'), name='dispatch')
 class DelAbonDeleteView(DeleteView):
     model = models.Abon
@@ -181,7 +181,7 @@ class DelAbonDeleteView(DeleteView):
             messages.error(self.request, e)
         except NasFailedResult as e:
             messages.error(self.request, _("NAS says: '%s'") % e)
-        except mydefs.MultipleException as errs:
+        except lib.MultipleException as errs:
             for err in errs.err_list:
                 messages.error(self.request, err)
         return HttpResponseRedirect(self.success_url)
@@ -196,7 +196,7 @@ def abonamount(request, gid, uname):
         if request.method == 'POST':
             abonuname = request.POST.get('abonuname')
             if abonuname == uname:
-                amnt = mydefs.safe_float(request.POST.get('amount'))
+                amnt = lib.safe_float(request.POST.get('amount'))
                 abon.add_ballance(request.user, amnt, comment=_('fill account through admin side'))
                 abon.save(update_fields=('ballance',))
                 messages.success(request, _('Account filled successfully on %.2f') % amnt)
@@ -205,7 +205,7 @@ def abonamount(request, gid, uname):
                 messages.error(request, _('I not know the account id'))
     except (NasNetworkError, NasFailedResult) as e:
         messages.error(request, e)
-    except mydefs.MultipleException as errs:
+    except lib.MultipleException as errs:
         for err in errs.err_list:
             messages.error(request, err)
     return render_to_text('abonapp/modal_abonamount.html', {
@@ -214,7 +214,7 @@ def abonamount(request, gid, uname):
     }, request=request)
 
 
-@method_decorator((login_required, mydefs.only_admins), name='dispatch')
+@method_decorator((login_required, lib.only_admins), name='dispatch')
 @method_decorator(permission_required('group_app.can_view_group', (Group, 'pk', 'gid')), name='dispatch')
 class DebtsListView(BaseAbonListView):
     context_object_name = 'invoices'
@@ -232,7 +232,7 @@ class DebtsListView(BaseAbonListView):
         return context
 
 
-@method_decorator((login_required, mydefs.only_admins), name='dispatch')
+@method_decorator((login_required, lib.only_admins), name='dispatch')
 @method_decorator(permission_required('group_app.can_view_group', (Group, 'pk', 'gid')), name='dispatch')
 class PayHistoryListView(BaseAbonListView):
     context_object_name = 'pay_history'
@@ -252,7 +252,7 @@ class PayHistoryListView(BaseAbonListView):
 
 
 @login_required
-@mydefs.only_admins
+@lib.only_admins
 def abon_services(request, gid, uname):
     grp = get_object_or_404(Group, pk=gid)
     if not request.user.has_perm('group_app.can_view_group', grp):
@@ -277,7 +277,7 @@ def abon_services(request, gid, uname):
     })
 
 
-@method_decorator((login_required, mydefs.only_admins), name='dispatch')
+@method_decorator((login_required, lib.only_admins), name='dispatch')
 @method_decorator(permission_required('abonapp.change_abon'), name='post')
 class AbonHomeUpdateView(UpdateView):
     model = models.Abon
@@ -291,11 +291,11 @@ class AbonHomeUpdateView(UpdateView):
     def dispatch(self, request, *args, **kwargs):
         try:
             return super(AbonHomeUpdateView, self).dispatch(request, *args, **kwargs)
-        except mydefs.LogicError as e:
+        except lib.LogicError as e:
             messages.error(request, e)
         except (NasFailedResult, NasNetworkError) as e:
             messages.error(request, e)
-        except mydefs.MultipleException as errs:
+        except lib.MultipleException as errs:
             for err in errs.err_list:
                 messages.error(request, err)
         return self.render_to_response(self.get_context_data())
@@ -342,11 +342,11 @@ class AbonHomeUpdateView(UpdateView):
 
     def get_context_data(self, **kwargs):
         abon = self.object
-        dev = getattr(abon, 'device')
+        device = getattr(abon, 'device')
         context = {
             'group': self.group,
-            'device': dev,
-            'dev_ports': DevPort.objects.filter(device=dev) if dev else None
+            'device': device,
+            'dev_ports': DevPort.objects.filter(device=device) if device else None
         }
         context.update(kwargs)
         return super(AbonHomeUpdateView, self).get_context_data(**context)
@@ -354,9 +354,9 @@ class AbonHomeUpdateView(UpdateView):
     def get_success_url(self):
         abon = self.object
         return resolve_url('abonapp:abon_home',
-            gid=getattr(abon.group, 'pk', 0),
-            uname=abon.username
-        )
+                           gid=getattr(abon.group, 'pk', 0),
+                           uname=abon.username
+                           )
 
 
 @transaction.atomic
@@ -377,7 +377,7 @@ def add_invoice(request, gid, uname):
 
     try:
         if request.method == 'POST':
-            curr_amount = mydefs.safe_int(request.POST.get('curr_amount'))
+            curr_amount = lib.safe_int(request.POST.get('curr_amount'))
             comment = request.POST.get('comment')
 
             newinv = models.InvoiceForPayment()
@@ -395,7 +395,7 @@ def add_invoice(request, gid, uname):
 
     except (NasNetworkError, NasFailedResult) as e:
         messages.error(request, e)
-    except mydefs.MultipleException as errs:
+    except lib.MultipleException as errs:
         for err in errs.err_list:
             messages.error(request, err)
     return render(request, 'abonapp/addInvoice.html', {
@@ -406,7 +406,7 @@ def add_invoice(request, gid, uname):
 
 
 @login_required
-@mydefs.only_admins
+@lib.only_admins
 @permission_required('abonapp.can_buy_tariff')
 @transaction.atomic
 def pick_tariff(request, gid, uname):
@@ -429,14 +429,14 @@ def pick_tariff(request, gid, uname):
             abon.sync_with_nas(created=False)
             messages.success(request, _('Tariff has been picked'))
             return redirect('abonapp:abon_services', gid=gid, uname=abon.username)
-    except (mydefs.LogicError, NasFailedResult) as e:
+    except (lib.LogicError, NasFailedResult) as e:
         messages.error(request, e)
     except NasNetworkError as e:
         messages.error(request, e)
         return redirect('abonapp:abon_services', gid=gid, uname=abon.username)
     except Tariff.DoesNotExist:
         messages.error(request, _('Tariff your picked does not exist'))
-    except mydefs.MultipleException as errs:
+    except lib.MultipleException as errs:
         for err in errs.err_list:
             messages.error(request, err)
     except ValueError as e:
@@ -446,7 +446,7 @@ def pick_tariff(request, gid, uname):
         'tariffs': tariffs,
         'abon': abon,
         'group': grp,
-        'selected_tariff': mydefs.safe_int(request.GET.get('selected_tariff'))
+        'selected_tariff': lib.safe_int(request.GET.get('selected_tariff'))
     })
 
 
@@ -463,7 +463,7 @@ def unsubscribe_service(request, gid, uname, abon_tariff_id):
         messages.error(request, e)
     except NasNetworkError as e:
         messages.warning(request, e)
-    except mydefs.MultipleException as errs:
+    except lib.MultipleException as errs:
         for err in errs.err_list:
             messages.error(request, err)
     return redirect('abonapp:abon_services', gid=gid, uname=uname)
@@ -550,7 +550,7 @@ class PassportUpdateView(UpdateView):
 
 
 @login_required
-@mydefs.only_admins
+@lib.only_admins
 def chgroup_tariff(request, gid):
     grp = get_object_or_404(Group, pk=gid)
     if not request.user.has_perm('group_app.change_group', grp):
@@ -578,8 +578,7 @@ def dev(request, gid, uname):
     try:
         abon = models.Abon.objects.get(username=uname)
         if request.method == 'POST':
-            dev = Device.objects.get(pk=request.POST.get('dev'))
-            abon.device = dev
+            abon.device = Device.objects.get(pk=request.POST.get('dev'))
             abon.save(update_fields=('device',))
             messages.success(request, _('Device has successfully attached'))
             return redirect('abonapp:abon_home', gid=gid, uname=uname)
@@ -683,7 +682,7 @@ def make_extra_field(request, gid, uname):
     except (NasNetworkError, NasFailedResult) as e:
         messages.error(request, e)
         frm = forms.ExtraFieldForm()
-    except mydefs.MultipleException as errs:
+    except lib.MultipleException as errs:
         for err in errs.err_list:
             messages.error(request, err)
         frm = forms.ExtraFieldForm()
@@ -731,7 +730,7 @@ def abon_ping(request):
     text = '<span class="glyphicon glyphicon-exclamation-sign"></span> %s' % _('no ping')
     try:
         if ip is None:
-            raise mydefs.LogicError(_('Ip not passed'))
+            raise lib.LogicError(_('Ip not passed'))
         tm = Transmitter()
         ping_result = tm.ping(ip)
         if ping_result is None:
@@ -756,7 +755,7 @@ def abon_ping(request):
                 text = '<span class="glyphicon glyphicon-ok"></span> %s' % _('ping ok') + ' ' + str(ping_result)
                 status = True
 
-    except (NasFailedResult, mydefs.LogicError) as e:
+    except (NasFailedResult, lib.LogicError) as e:
         messages.error(request, e)
     except NasNetworkError as e:
         messages.warning(request, e)
@@ -767,7 +766,7 @@ def abon_ping(request):
     }
 
 
-@method_decorator((login_required, mydefs.only_admins,), name='dispatch')
+@method_decorator((login_required, lib.only_admins,), name='dispatch')
 class DialsListView(BaseAbonListView):
     context_object_name = 'logs'
     template_name = 'abonapp/dial_log.html'
@@ -813,7 +812,7 @@ def save_user_dev_port(request, gid, uname):
     if request.method != 'POST':
         messages.error(request, _('Method is not POST'))
         return redirect('abonapp:abon_home', gid, uname)
-    user_port = mydefs.safe_int(request.POST.get('user_port'))
+    user_port = lib.safe_int(request.POST.get('user_port'))
     is_dynamic_ip = request.POST.get('is_dynamic_ip')
     is_dynamic_ip = True if is_dynamic_ip == 'on' else False
     try:
@@ -948,7 +947,7 @@ def tel_add(request, gid, uname):
 @permission_required('abnapp.delete_additionaltelephone')
 def tel_del(request, gid, uname):
     try:
-        tid = mydefs.safe_int(request.GET.get('tid'))
+        tid = lib.safe_int(request.GET.get('tid'))
         tel = models.AdditionalTelephone.objects.get(pk=tid)
         tel.delete()
         messages.success(request, _('Additional telephone successfully deleted'))
@@ -964,17 +963,17 @@ def phonebook(request, gid):
     t1 = models.Abon.objects.filter(group__id=int(gid)).only('telephone', 'fio').values_list('telephone', 'fio')
     t2 = models.AdditionalTelephone.objects.filter(abon__group__id=gid).only('telephone', 'owner_name').values_list(
         'telephone', 'owner_name')
-    tels = list(t1) + list(t2)
+    telephones = tuple(t1) + tuple(t2)
     if res_format == 'csv':
         import csv
         response = HttpResponse(content_type='text/csv')
         response['Content-Disposition'] = 'attachment; filename="phones.csv"'
         writer = csv.writer(response, quoting=csv.QUOTE_NONNUMERIC)
-        for row in tels:
+        for row in telephones:
             writer.writerow(row)
         return response
     return render_to_text('abonapp/modal_phonebook.html', {
-        'tels': tels,
+        'tels': telephones,
         'gid': gid
     }, request=request)
 
@@ -1029,7 +1028,7 @@ def reset_ip(request, gid, uname):
 
 
 @login_required
-@mydefs.only_admins
+@lib.only_admins
 def fin_report(request):
     q = models.AllTimePayLog.objects.by_days()
     res_format = request.GET.get('f')
@@ -1089,7 +1088,7 @@ def del_periodic_pay(request, gid, uname, periodic_pay_id):
     return redirect('abonapp:abon_services', gid, uname)
 
 
-@method_decorator((login_required, mydefs.only_admins,), name='dispatch')
+@method_decorator((login_required, lib.only_admins,), name='dispatch')
 class EditSibscriberMarkers(UpdateView):
     http_method_names = ('get', 'post')
     template_name = 'abonapp/modal_user_markers.html'
@@ -1120,7 +1119,7 @@ class EditSibscriberMarkers(UpdateView):
 
 # API's
 @login_required
-@mydefs.only_admins
+@lib.only_admins
 @json_view
 def abons(request):
     ablist = ({
@@ -1145,7 +1144,7 @@ def abons(request):
 
 
 @login_required
-@mydefs.only_admins
+@lib.only_admins
 @json_view
 def search_abon(request):
     word = request.GET.get('s')
@@ -1172,15 +1171,14 @@ class DhcpLever(SecureApiView):
 
     @staticmethod
     def on_dhcp_event(data: Dict) -> Optional[str]:
-        '''
+        """
         data = {
             'client_ip': ip2int('127.0.0.1'),
             'client_mac': 'aa:bb:cc:dd:ee:ff',
             'switch_mac': 'aa:bb:cc:dd:ee:ff',
             'switch_port': 3,
             'cmd': 'commit'
-        }
-        '''
+        }"""
         r = None
         try:
             action = data['cmd']
@@ -1193,7 +1191,7 @@ class DhcpLever(SecureApiView):
                 r = dhcp_expiry(data['client_ip'])
             elif action == 'release':
                 r = dhcp_release(data['client_ip'])
-        except mydefs.LogicError as e:
+        except lib.LogicError as e:
             print('LogicError', e)
             r = str(e)
         return r
diff --git a/accounts_app/views.py b/accounts_app/views.py
index d0bc04f..6cdd24e 100644
--- a/accounts_app/views.py
+++ b/accounts_app/views.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 from django.contrib.auth.decorators import login_required
 from django.contrib.auth import authenticate, login, logout
 from django.core.exceptions import PermissionDenied
@@ -15,7 +14,7 @@ from group_app.models import Group
 
 from .models import UserProfile
 from .forms import AvatarChangeForm
-import mydefs
+from djing import lib
 from guardian.decorators import permission_required_or_403 as permission_required
 from guardian.shortcuts import get_objects_for_user, assign_perm, remove_perm
 
@@ -62,9 +61,9 @@ class SignOut(RedirectView):
 
 
 @login_required
-@mydefs.only_admins
+@lib.only_admins
 def profile_show(request, uid=0):
-    uid = mydefs.safe_int(uid)
+    uid = lib.safe_int(uid)
 
     if uid == 0:
         return redirect('acc_app:other_profile', uid=request.user.id)
@@ -87,7 +86,7 @@ def profile_show(request, uid=0):
     })
 
 
-@method_decorator((login_required, mydefs.only_admins), name='dispatch')
+@method_decorator((login_required, lib.only_admins), name='dispatch')
 class AvatarUpdateView(UpdateView):
     form_class = AvatarChangeForm
     template_name = 'accounts/settings/ch_info.html'
@@ -100,7 +99,7 @@ class AvatarUpdateView(UpdateView):
 
 
 @login_required
-@mydefs.only_admins
+@lib.only_admins
 def ch_info(request):
     if request.method == 'POST':
         user = request.user
@@ -169,7 +168,7 @@ def create_profile(request):
 
 
 @login_required
-@mydefs.only_admins
+@lib.only_admins
 def delete_profile(request, uid):
     prf = get_object_or_404(UserProfile, id=uid)
     if uid != request.user.id:
@@ -180,7 +179,7 @@ def delete_profile(request, uid):
     return redirect('acc_app:accounts_list')
 
 
-@method_decorator((login_required, mydefs.only_admins), name='dispatch')
+@method_decorator((login_required, lib.only_admins), name='dispatch')
 class AccountsListView(BaseAccListView):
     template_name = 'accounts/acc_list.html'
     context_object_name = 'users'
@@ -288,7 +287,7 @@ def set_abon_groups_permission(request, uid):
     })
 
 
-@method_decorator((login_required, mydefs.only_admins), name='dispatch')
+@method_decorator((login_required, lib.only_admins), name='dispatch')
 class ManageResponsibilityGroups(ListView):
     http_method_names = ('get', 'post')
     template_name = 'accounts/manage_responsibility_groups.html'
diff --git a/agent/mod_mikrotik.py b/agent/mod_mikrotik.py
index 03adb24..3f246ce 100644
--- a/agent/mod_mikrotik.py
+++ b/agent/mod_mikrotik.py
@@ -6,7 +6,7 @@ from abc import ABCMeta
 from hashlib import md5
 from typing import Iterable, Optional, Tuple
 from .core import BaseTransmitter, NasFailedResult, NasNetworkError
-from mydefs import singleton
+from djing.lib import singleton
 from .structs import TariffStruct, AbonStruct, IpStruct, VectorAbon, VectorTariff
 from . import settings as local_settings
 from django.conf import settings
diff --git a/agent/structs.py b/agent/structs.py
index 13f85b2..39c7bac 100644
--- a/agent/structs.py
+++ b/agent/structs.py
@@ -1,18 +1,18 @@
 # -*- coding: utf-8 -*-
 from abc import ABCMeta, abstractmethod
 from struct import pack, unpack, calcsize
-from typing import Iterable
-from .utils import int2ip, ip2int
+from typing import Iterable, Optional
+from djing.lib import int2ip, ip2int
 
 
 class BaseStruct(object, metaclass=ABCMeta):
     @abstractmethod
-    def serialize(self):
-        """привращаем инфу в бинарную строку"""
+    def serialize(self) -> Optional[bytes]:
+        """make binary"""
 
     @abstractmethod
-    def deserialize(self, data, *args):
-        """создаём объект из бинарной строки"""
+    def deserialize(self, data: bytes, *args):
+        """restore from binary"""
 
     def __ne__(self, other):
         return not self == other
@@ -25,11 +25,11 @@ class IpStruct(BaseStruct):
         else:
             self.__ip = ip2int(str(ip))
 
-    def serialize(self):
+    def serialize(self) -> Optional[bytes]:
         dt = pack("!I", int(self.__ip))
         return dt
 
-    def deserialize(self, data, *args):
+    def deserialize(self, data: bytes, *args):
         dt = unpack("!I", data)
         self.__ip = int(dt[0])
         return self
@@ -54,12 +54,12 @@ class IpStruct(BaseStruct):
 
 # Как обслуживается абонент
 class TariffStruct(BaseStruct):
-    def __init__(self, tariff_id=0, speedIn=None, speedOut=None):
+    def __init__(self, tariff_id=0, speed_in=None, speed_out=None):
         self.tid = int(tariff_id)
-        self.speedIn = float(speedIn if speedIn is not None else 0.001)
-        self.speedOut = float(speedOut if speedOut is not None else 0.001)
+        self.speedIn = speed_in or 0
+        self.speedOut = speed_out or 0
 
-    def serialize(self):
+    def serialize(self) -> Optional[bytes]:
         dt = pack("!Iff", int(self.tid), float(self.speedIn), float(self.speedOut))
         return dt
 
@@ -67,7 +67,7 @@ class TariffStruct(BaseStruct):
     def is_empty(self):
         return self.tid == 0 and self.speedIn == 0.001 and self.speedOut == 0.001
 
-    def deserialize(self, data, *args):
+    def deserialize(self, data: bytes, *args):
         dt = unpack("!Iff", data)
         self.tid = int(dt[0])
         self.speedIn = float(dt[1])
@@ -96,7 +96,7 @@ class AbonStruct(BaseStruct):
         self.tariff = tariff
         self.is_active = is_active
 
-    def serialize(self):
+    def serialize(self) -> Optional[bytes]:
         if self.tariff is None:
             return
         if not isinstance(self.tariff, TariffStruct):
@@ -106,7 +106,7 @@ class AbonStruct(BaseStruct):
         dt = pack("!LII?", self.uid, int(self.ip), self.tariff.tid, self.is_active)
         return dt
 
-    def deserialize(self, data, tariff=None):
+    def deserialize(self, data: bytes, tariff=None):
         dt = unpack("!LII?", data)
         self.uid = dt[0]
         self.ip = IpStruct(dt[1])
@@ -137,12 +137,12 @@ class ShapeItem(BaseStruct):
         self.abon = abon
         self.sid = sid
 
-    def serialize(self):
+    def serialize(self) -> Optional[bytes]:
         abon_pack = self.abon.serialize()
         dt = pack('!L', self.sid)
         return dt + abon_pack
 
-    def deserialize(self, data, *args):
+    def deserialize(self, data: bytes, *args):
         sz = calcsize('!L')
         dt = unpack('!L', data[:sz])
         self.sid = dt
diff --git a/clientsideapp/views.py b/clientsideapp/views.py
index f95b796..68f9cfe 100644
--- a/clientsideapp/views.py
+++ b/clientsideapp/views.py
@@ -8,7 +8,7 @@ from django.utils.translation import gettext_lazy as _, gettext
 from abonapp.models import AbonLog, InvoiceForPayment, Abon
 from tariff_app.models import Tariff
 from taskapp.models import Task
-from mydefs import LogicError
+from djing.lib import LogicError
 from agent import NasFailedResult, NasNetworkError
 
 
diff --git a/devapp/migrations/0001_initial.py b/devapp/migrations/0001_initial.py
index fa24063..9103f5f 100644
--- a/devapp/migrations/0001_initial.py
+++ b/devapp/migrations/0001_initial.py
@@ -5,7 +5,7 @@ from __future__ import unicode_literals
 from django.db import migrations, models
 import django.db.models.deletion
 import djing.fields
-import mydefs
+from djing.lib import MyGenericIPAddressField
 
 
 class Migration(migrations.Migration):
@@ -21,7 +21,7 @@ class Migration(migrations.Migration):
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 (
-                'ip_address', mydefs.MyGenericIPAddressField(max_length=8, protocol='ipv4', verbose_name='Ip address')),
+                'ip_address', MyGenericIPAddressField(max_length=8, protocol='ipv4', verbose_name='Ip address')),
                 ('mac_addr', djing.fields.MACAddressField(blank=True, integer=True, null=True, unique=True,
                                                           verbose_name='Mac address')),
                 ('comment', models.CharField(max_length=256, verbose_name='Comment')),
diff --git a/devapp/migrations/0002_auto_20180409_1318.py b/devapp/migrations/0002_auto_20180409_1318.py
index ea0fad0..891cd0c 100644
--- a/devapp/migrations/0002_auto_20180409_1318.py
+++ b/devapp/migrations/0002_auto_20180409_1318.py
@@ -3,7 +3,7 @@
 from __future__ import unicode_literals
 
 from django.db import migrations
-import mydefs
+from djing.lib import MyGenericIPAddressField
 
 
 class Migration(migrations.Migration):
@@ -20,7 +20,7 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='device',
             name='ip_address',
-            field=mydefs.MyGenericIPAddressField(blank=True, max_length=8, null=True, protocol='ipv4',
+            field=MyGenericIPAddressField(blank=True, max_length=8, null=True, protocol='ipv4',
                                                  verbose_name='Ip address'),
         ),
     ]
diff --git a/dialing_app/views.py b/dialing_app/views.py
index ce5c203..0108d26 100644
--- a/dialing_app/views.py
+++ b/dialing_app/views.py
@@ -16,7 +16,7 @@ from jsonview.decorators import json_view
 from abonapp.models import Abon
 from djing.global_base_views import SecureApiView
 from djing import JSONType
-from mydefs import only_admins, safe_int
+from djing.lib import only_admins, safe_int
 from .models import AsteriskCDR, SMSModel, SMSOut
 from .forms import SMSOutForm
 
diff --git a/djing/lib/__init__.py b/djing/lib/__init__.py
new file mode 100644
index 0000000..948f5d5
--- /dev/null
+++ b/djing/lib/__init__.py
@@ -0,0 +1,186 @@
+import socket
+import struct
+from datetime import timedelta
+from collections import Iterator
+from functools import wraps
+from json import dumps
+from django.http import HttpResponse, Http404, HttpResponseRedirect
+from django.shortcuts import redirect
+from django.db import models
+from django.conf import settings
+
+DEBUG = getattr(settings, 'DEBUG', False)
+
+
+def ip2int(addr):
+    try:
+        return struct.unpack("!I", socket.inet_aton(addr))[0]
+    except:
+        return 0
+
+
+def int2ip(addr):
+    try:
+        return socket.inet_ntoa(struct.pack("!I", addr))
+    except:
+        return ''
+
+
+def safe_float(fl):
+    try:
+        return 0.0 if fl is None or fl == '' else float(fl)
+    except ValueError:
+        return 0.0
+
+
+def safe_int(i):
+    try:
+        return 0 if i is None or i == '' else int(i)
+    except ValueError:
+        return 0
+
+
+def res_success(request, redirect_to='/'):
+    if request.is_ajax():
+        return HttpResponse(dumps({'errnum': 0}))
+    else:
+        return redirect(redirect_to)
+
+
+def res_error(request, text):
+    if request.is_ajax():
+        return HttpResponse(dumps({'errnum': 1, 'errtext': text}))
+    else:
+        raise Http404(text)
+
+
+class MyGenericIPAddressField(models.GenericIPAddressField):
+    description = "Int32 notation ip address"
+
+    def __init__(self, protocol='ipv4', *args, **kwargs):
+        super(MyGenericIPAddressField, self).__init__(protocol=protocol, *args, **kwargs)
+        self.max_length = 8
+
+    def get_prep_value(self, value):
+        # strIp to Int
+        value = super(MyGenericIPAddressField, self).get_prep_value(value)
+        return ip2int(value)
+
+    def to_python(self, value):
+        return value
+
+    def get_internal_type(self):
+        return 'PositiveIntegerField'
+
+    @staticmethod
+    def from_db_value(value, expression, connection, context):
+        return int2ip(value) if value != 0 else None
+
+    def int_ip(self):
+        return ip2int(self)
+
+
+# Предназначен для Django CHOICES чтоб можно было передавать классы вместо просто описания поля,
+# классы передавать для того чтоб по значению кода из базы понять какой класс нужно взять для нужной функциональности.
+# Например по коду в базе вам нужно определять как считать тариф абонента, что реализовано в возвращаемом классе.
+class MyChoicesAdapter(Iterator):
+    chs = tuple()
+    current_index = 0
+    _max_index = 0
+
+    # На вход принимает кортеж кортежей, вложенный из 2х элементов: кода и класса, как: TARIFF_CHOICES
+    def __init__(self, choices):
+        self._max_index = len(choices)
+        self.chs = choices
+
+    def __next__(self):
+        if self.current_index >= self._max_index:
+            raise StopIteration
+        else:
+            e = self.chs
+            ci = self.current_index
+            res = e[ci][0], e[ci][1].description()
+            self.current_index += 1
+            return res
+
+
+# Allow to view only admins
+def only_admins(fn):
+    @wraps(fn)
+    def wrapped(request, *args, **kwargs):
+        if request.user.is_admin:
+            return fn(request, *args, **kwargs)
+        else:
+            return redirect('client_side:home')
+
+    return wrapped
+
+
+# Russian localized timedelta
+class RuTimedelta(timedelta):
+    def __new__(cls, tm):
+        if isinstance(tm, timedelta):
+            return timedelta.__new__(
+                cls,
+                days=tm.days,
+                seconds=tm.seconds,
+                microseconds=tm.microseconds
+            )
+
+    def __str__(self):
+        # hours, remainder = divmod(self.seconds, 3600)
+        # minutes, seconds = divmod(remainder, 60)
+        # text_date = "%d:%d" % (
+        #    hours,
+        #    minutes
+        # )
+        if self.days > 1:
+            ru_days = 'дней'
+            if 5 > self.days > 1:
+                ru_days = 'дня'
+            elif self.days == 1:
+                ru_days = 'день'
+            # text_date = '%d %s %s' % (self.days, ru_days, text_date)
+            text_date = '%d %s' % (self.days, ru_days)
+        else:
+            text_date = ''
+        return text_date
+
+
+def require_ssl(view):
+    """
+    Decorator that requires an SSL connection. If the current connection is not SSL, we redirect to the SSL version of
+    the page.
+    from: https://gist.github.com/ckinsey/9709984
+    """
+
+    @wraps(view)
+    def wrapper(request, *args, **kwargs):
+        if not DEBUG and not request.is_secure():
+            target_url = "https://" + request.META['HTTP_HOST'] + request.path_info
+            return HttpResponseRedirect(target_url)
+        return view(request, *args, **kwargs)
+
+    return wrapper
+
+
+class MultipleException(Exception):
+    def __init__(self, err_list):
+        if not isinstance(err_list, (list, tuple)):
+            raise TypeError
+        self.err_list = err_list
+
+
+class LogicError(Exception):
+    pass
+
+
+def singleton(class_):
+    instances = {}
+
+    def getinstance(*args, **kwargs):
+        if class_ not in instances:
+            instances[class_] = class_(*args, **kwargs)
+        return instances[class_]
+
+    return getinstance
diff --git a/djing/settings.py b/djing/settings.py
index 4b38677..d73a627 100644
--- a/djing/settings.py
+++ b/djing/settings.py
@@ -25,7 +25,7 @@ ALLOWED_HOSTS = local_settings.ALLOWED_HOSTS
 
 # required for django-guardian
 AUTHENTICATION_BACKENDS = (
-    'djing.auth_backends.CustomAuthBackend',
+    'djing.lib.auth_backends.CustomAuthBackend',
     # 'django.contrib.auth.backends.ModelBackend', # default
     'guardian.backends.ObjectPermissionBackend'
 )
diff --git a/docs/dev.md b/docs/dev.md
index 09d00e4..ce2fff9 100644
--- a/docs/dev.md
+++ b/docs/dev.md
@@ -343,7 +343,7 @@ def check_news(request):
     return HttpResponse(dumps(r))
 ```
 
-Убедитесь что вашему представлению не будет доступа от абонентов, об этом позаботится декоратор *only_admins* из *mydefs*. *mydefs* лежит в корне проекта.
+Убедитесь что вашему представлению не будет доступа от абонентов, об этом позаботится декоратор *only_admins* из *djing.lib*.
 
 После получения сообщения надо вернуть словарь с параметрами:
 
diff --git a/mapapp/views.py b/mapapp/views.py
index f996f42..1b61c28 100644
--- a/mapapp/views.py
+++ b/mapapp/views.py
@@ -14,7 +14,7 @@ from jsonview.decorators import json_view
 from group_app.models import Group
 from .models import Dot
 from .forms import DotForm
-from mydefs import safe_int
+from djing.lib import safe_int
 from devapp.models import Device
 from guardian.decorators import permission_required
 
diff --git a/periodic.py b/periodic.py
index 6d7b4cc..0657bb5 100755
--- a/periodic.py
+++ b/periodic.py
@@ -9,7 +9,7 @@ from django.db import transaction
 from django.db.models import signals
 from abonapp.models import Abon, AbonTariff, abontariff_pre_delete, PeriodicPayForId, AbonLog
 from agent import Transmitter, NasNetworkError, NasFailedResult
-from mydefs import LogicError
+from djing.lib import LogicError
 
 
 def main():
diff --git a/statistics/migrations/0001_initial.py b/statistics/migrations/0001_initial.py
index bd83354..4148c97 100644
--- a/statistics/migrations/0001_initial.py
+++ b/statistics/migrations/0001_initial.py
@@ -3,7 +3,7 @@
 from __future__ import unicode_literals
 
 from django.db import migrations, models
-import mydefs
+from djing.lib import MyGenericIPAddressField
 import statistics.fields
 
 
@@ -18,8 +18,7 @@ class Migration(migrations.Migration):
             name='StatCache',
             fields=[
                 ('last_time', statistics.fields.UnixDateTimeField()),
-                (
-                'ip', mydefs.MyGenericIPAddressField(max_length=8, primary_key=True, protocol='ipv4', serialize=False)),
+                ('ip', MyGenericIPAddressField(max_length=8, primary_key=True, protocol='ipv4', serialize=False)),
                 ('octets', models.PositiveIntegerField(default=0)),
                 ('packets', models.PositiveIntegerField(default=0)),
             ],
diff --git a/statistics/models.py b/statistics/models.py
index c5bc191..13ff2b4 100644
--- a/statistics/models.py
+++ b/statistics/models.py
@@ -3,7 +3,7 @@ from datetime import datetime, timedelta, date, time
 from django.db import models, connection, ProgrammingError
 from django.utils.timezone import now
 
-from mydefs import MyGenericIPAddressField
+from djing.lib import MyGenericIPAddressField
 from .fields import UnixDateTimeField
 
 
diff --git a/tariff_app/base_intr.py b/tariff_app/base_intr.py
index cd2f8aa..970dbe9 100644
--- a/tariff_app/base_intr.py
+++ b/tariff_app/base_intr.py
@@ -17,7 +17,7 @@ class TariffBase(metaclass=ABCMeta):
     @staticmethod
     def description() -> AnyStr:
         """
-        Usage in mydefs.MyChoicesAdapter for choices fields.
+        Usage in djing.lib.MyChoicesAdapter for choices fields.
         :return: human readable description
         """
         raise NotImplementedError
@@ -54,5 +54,5 @@ class PeriodicPayCalcBase(metaclass=ABCMeta):
     @staticmethod
     def description() -> AnyStr:
         """Return text description.
-        Uses in mydefs.MyChoicesAdapter for CHOICES fields"""
+        Uses in djing.lib.MyChoicesAdapter for CHOICES fields"""
         raise NotImplementedError
diff --git a/tariff_app/models.py b/tariff_app/models.py
index 3cb82cb..6ca5e04 100644
--- a/tariff_app/models.py
+++ b/tariff_app/models.py
@@ -5,7 +5,7 @@ from django.dispatch import receiver
 from .base_intr import TariffBase, PeriodicPayCalcBase
 from .custom_tariffs import TARIFF_CHOICES, PERIODIC_PAY_CHOICES
 from group_app.models import Group
-from mydefs import MyChoicesAdapter
+from djing.lib import MyChoicesAdapter
 from jsonfield import JSONField
 
 
diff --git a/tariff_app/views.py b/tariff_app/views.py
index 9dbdaaa..1f0d7d9 100644
--- a/tariff_app/views.py
+++ b/tariff_app/views.py
@@ -12,7 +12,7 @@ from guardian.decorators import permission_required_or_403 as permission_require
 
 from djing.global_base_views import OrderingMixin
 from .models import Tariff, PeriodicPay
-import mydefs
+from djing import lib
 from . import forms
 
 
@@ -21,7 +21,7 @@ class BaseServiceListView(ListView):
     paginate_by = getattr(settings, 'PAGINATION_ITEMS_PER_PAGE', 10)
 
 
-@method_decorator((login_required, mydefs.only_admins), name='dispatch')
+@method_decorator((login_required, lib.only_admins), name='dispatch')
 class TariffsListView(BaseServiceListView, OrderingMixin):
     """
     Show Services(Tariffs) list
@@ -33,7 +33,7 @@ class TariffsListView(BaseServiceListView, OrderingMixin):
 
 @login_required
 def edit_tarif(request, tarif_id=0):
-    tarif_id = mydefs.safe_int(tarif_id)
+    tarif_id = lib.safe_int(tarif_id)
 
     if tarif_id == 0:
         if not request.user.has_perm('tariff_app.add_tariff'):
@@ -70,7 +70,7 @@ def del_tarif(request, tid):
             messages.success(request, _('Service has been deleted'))
         else:
             messages.error(request, _('Not have a confirmations of delete'))
-        return mydefs.res_success(request, 'tarifs:home')
+        return lib.res_success(request, 'tarifs:home')
     return render_to_text('tariff_app/modal_del_warning.html', {'tid': tid}, request=request)
 
 
diff --git a/taskapp/handle.py b/taskapp/handle.py
index c973dc3..cabcdfc 100644
--- a/taskapp/handle.py
+++ b/taskapp/handle.py
@@ -2,7 +2,7 @@
 from django.utils.translation import gettext as _
 from chatbot.telebot import send_notify
 from chatbot.models import ChatException
-from mydefs import MultipleException
+from djing.lib import MultipleException
 
 
 class TaskException(Exception):
diff --git a/taskapp/migrations/0001_initial.py b/taskapp/migrations/0001_initial.py
index 06da89c..fe69535 100644
--- a/taskapp/migrations/0001_initial.py
+++ b/taskapp/migrations/0001_initial.py
@@ -51,7 +51,7 @@ class Migration(migrations.Migration):
                 ('priority',
                  models.CharField(choices=[('A', 'Higher'), ('C', 'Average'), ('E', 'Low')], default='E', max_length=1,
                                   verbose_name='A priority')),
-                ('out_date', models.DateField(blank=True, default=taskapp.models._delta_add_days, null=True,
+                ('out_date', models.DateField(blank=True, default=taskapp.models.delta_add_days, null=True,
                                               verbose_name='Reality')),
                 ('time_of_create', models.DateTimeField(auto_now_add=True, verbose_name='Date of create')),
                 ('state', models.CharField(choices=[('S', 'New'), ('C', 'Confused'), ('F', 'Completed')], default='S',
diff --git a/taskapp/views.py b/taskapp/views.py
index 949e521..b0624a8 100644
--- a/taskapp/views.py
+++ b/taskapp/views.py
@@ -1,5 +1,3 @@
-# coding=utf-8
-from json import dumps
 from django.contrib.auth.decorators import login_required
 from django.core.exceptions import PermissionDenied
 from django.http import HttpResponse
@@ -15,12 +13,14 @@ from datetime import datetime
 
 from django.views.generic.edit import FormMixin, DeleteView, UpdateView
 from guardian.decorators import permission_required_or_403 as permission_required
+from jsonview.decorators import json_view
+
 from chatbot.models import MessageQueue
 from abonapp.models import Abon
 from djing import httpresponse_to_referrer
+from djing.lib import only_admins, safe_int, MultipleException, RuTimedelta
 from .handle import TaskException
 from .models import Task, ExtraComment
-from mydefs import only_admins, safe_int, MultipleException, RuTimedelta
 from .forms import TaskFrm, ExtraCommentForm
 
 
@@ -249,6 +249,7 @@ def remind(request, task_id):
     return redirect('taskapp:home')
 
 
+@json_view
 def check_news(request):
     if request.user.is_authenticated and request.user.is_admin:
         msg = MessageQueue.objects.pop(user=request.user, tag='taskap')