diff --git a/api/webhook.py b/api/webhook.py
index 70c4e8e..fe1746c 100644
--- a/api/webhook.py
+++ b/api/webhook.py
@@ -1,7 +1,7 @@
 from sanic import Sanic
 from sanic.response import text
 
-from tgbot.config import WEBHOOK, FEEDBACK_CHAT_ID
+from tgbot.config import WEBHOOK, FEEDBACK_CHAT_ID, BUTTON_VOUCH
 
 from tgbot.handlers.handle_feedback import handle_feedback, handle_answer
 from tgbot.handlers.handle_members_change import handle_join, handle_left
@@ -12,7 +12,7 @@ from tgbot.handlers.command_graph import handle_command_graph
 from tgbot.handlers.callback_vouch import handle_button
 from tgbot.handlers.callback_unlink import handle_unlink
 
-from tgbot.api import register_webhook
+from tgbot.api import register_webhook, send_message
 
 
 app = Sanic(name="welcomecenter")
@@ -41,22 +41,25 @@ async def handle(req):
         # видимые сообщения
         msg = update.get('message', update.get('edited_message'))
         if msg:
-            if msg['chat']['id'] == msg['from']['id']:
-                if msg['text'] == '/my':
-                    handle_command_my(msg)
+            if 'text' in msg:
+                if msg['chat']['id'] == msg['from']['id']:
+                    if msg['text'] == '/my':
+                        handle_command_my(msg)
+                    else:
+                        handle_feedback(msg)
+                elif str(msg['chat']['id']) == FEEDBACK_CHAT_ID:
+                    if 'reply_to_message' in msg:
+                        handle_answer(msg)
+                    elif msg['text'] == '/graph':
+                        await handle_command_graph(msg)
                 else:
-                    handle_feedback(msg)
-            elif str(msg['chat']['id']) == FEEDBACK_CHAT_ID:
-                if 'reply_to_message' in msg:
-                    handle_answer(msg)
-                elif 'text' in msg and msg['text'] == '/graph':
-                    await handle_command_graph(msg)
+                    handle_default(msg)
             elif 'new_chat_member' in msg:
                 handle_join(msg)
             elif 'left_chat_member' in msg:
                 handle_left(msg)
             else:
-                handle_default(msg)
+                print('message without text')
 
         # кнопки
         elif 'callback_query' in update:
@@ -78,5 +81,6 @@ async def handle(req):
     
     except Exception:
         import traceback
+        r = send_message(FEEDBACK_CHAT_ID, f'<pre>{traceback.format_exc()}</pre>')
         traceback.print_exc()
     return text('ok')
diff --git a/requirements.txt b/requirements.txt
index 56f79e1..9d3ddd8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-sanic
+sanic==19.6.0
 requests
 redis
 aiohttp
\ No newline at end of file
diff --git a/tgbot/api.py b/tgbot/api.py
index 045757d..4b3c7d4 100644
--- a/tgbot/api.py
+++ b/tgbot/api.py
@@ -96,9 +96,10 @@ def approve_chat_join_request(chat_id, user_id):
 async def send_document(chat_id, data='', filename='chart.svg'):
     url = apiBase + "sendDocument"
     params = { "chat_id": chat_id }
-    files = { "document": data }
+    filedata = aiohttp.FormData()
+    filedata.add_field('document', data, filename=filename)
 
-    async with aiohttp.ClientSession(headers=headers) as session:
+    async with aiohttp.ClientSession() as session:
         async with session.post(url, params=params, data=filedata) as response:
             if response.status != 200:
                 error_text = await response.text()
@@ -114,18 +115,20 @@ async def send_document(chat_id, data='', filename='chart.svg'):
 
 
 # https://core.telegram.org/bots/api#sendphoto
-async def send_photo(png_data, chat_id):
+async def send_photo(chat_id, img_data, filename='chart.png'):
     url = apiBase + f"sendPhoto"
-    headers = {"Content-Type": "multipart/form-data"}
-    files = {"photo": ("chart.png", png_data)}
-    params = {"chat_id": chat_id}
+    params = {"chat_id": chat_id }
+    filedata = aiohttp.FormData()
+    filedata.add_field('photo', img_data, filename=filename)
     
-    async with aiohttp.ClientSession(headers=headers) as session:
+    async with aiohttp.ClientSession() as session:
         async with session.post(url, params=params, data=filedata) as response:
             if response.status != 200:
-                print(f"Error sending photo: {response.status}")
+                error_text = await response.text()
+                print(f"Error sending photo: {response.status} - {error_text}")
                 return None
 
+
             try:
                 return await response.json()
             except ValueError as e:
diff --git a/tgbot/handlers/callback_vouch.py b/tgbot/handlers/callback_vouch.py
index 91feaa6..82f615d 100644
--- a/tgbot/handlers/callback_vouch.py
+++ b/tgbot/handlers/callback_vouch.py
@@ -1,5 +1,6 @@
 from tgbot.api import send_message, forward_message, delete_message
 from tgbot.storage import Profile
+from tgbot.config import BUTTON_VOUCH
 
 
 def handle_button(callback_query):
diff --git a/tgbot/handlers/command_graph.py b/tgbot/handlers/command_graph.py
index d757cfb..516225f 100644
--- a/tgbot/handlers/command_graph.py
+++ b/tgbot/handlers/command_graph.py
@@ -25,5 +25,6 @@ async def handle_command_graph(msg):
         members.append(member)
     print(f'found {len(members)} members')
     data = generate_chart(members)
-    r = await send_document(msg['chat']['id'], data, 'chart.svg')
-    print(r)
+    if data:
+        r = await send_document(msg['chat']['id'], data, 'chart.svg')
+        print(r)
diff --git a/tgbot/handlers/command_my.py b/tgbot/handlers/command_my.py
index 25fe850..b8df0fe 100644
--- a/tgbot/handlers/command_my.py
+++ b/tgbot/handlers/command_my.py
@@ -1,5 +1,5 @@
 from tgbot.storage import Profile
-from tgbot.api import get_member
+from tgbot.api import get_member, send_message
 
 def construct_unlink_buttons(actor):
     buttons = []
diff --git a/tgbot/handlers/handle_default.py b/tgbot/handlers/handle_default.py
index 9dca22b..be28c74 100644
--- a/tgbot/handlers/handle_default.py
+++ b/tgbot/handlers/handle_default.py
@@ -1,7 +1,7 @@
 from tgbot.api import send_message, delete_message, get_chat_administrators
 from tgbot.storage import Profile
 from tgbot.handlers.send_button import show_request_msg
-
+from tgbot.storage import storage
 
 def handle_default(msg):
     print(f'default handler for all messages')
@@ -18,14 +18,14 @@ def handle_default(msg):
         print(r)
 
         # удалить предыдушее сообщение с кнопкой в этом чате
-        if sender['request_msg_id'].startswith(chat_id):
-            chat_id, rmid = sender['request_msg_id'].split(':')
-            r = delete_message(chat_id, rmid)
+        prev_msg_id = storage.get(f'btn-{chat_id}-{from_id}')
+        if prev_msg_id:
+            r = delete_message(chat_id, prev_msg_id)
             print(r)
 
         # показать новое сообщение с кнопкой
-        request_msg_id = show_request_msg(msg)
-        sender['request_msg_id'] = f'{chat_id}:{request_msg_id}'
+        btn_msg_id = show_request_msg(msg)
+        storage.set(f'btn-{chat_id}-{from_id}', btn_msg_id)
     else:
         # любое другое сообщение
         if len(sender['parents']) == 0:
@@ -33,11 +33,13 @@ def handle_default(msg):
             print(f'setting owner as parent for {from_id}')
             r = get_chat_administrators(chat_id)
             print(r)
+            owner_id = ''
+            for admin in r['result']:
+                if admin['status'] == 'creator':
+                    owner_id = admin['user']['id']
+                    break
             
-            owner_id = r['result'][0]['id']  # DEBUG!!
-
             sender['parents'].append(owner_id)
-            
             # обновляем профиль владельца
             owner = Profile.get(owner_id)
             owner['children'].append(from_id)
diff --git a/tgbot/handlers/handle_feedback.py b/tgbot/handlers/handle_feedback.py
index 3b8a79e..6229fd6 100644
--- a/tgbot/handlers/handle_feedback.py
+++ b/tgbot/handlers/handle_feedback.py
@@ -19,11 +19,14 @@ def handle_feedback(msg):
 
 
 def handle_answer(msg):
-    print(f'handle answer from support')
-    support_msg_id = str(msg['reply_to_message']['message_id'])
-    # получение сохраненного айди сообщения из личной переписки с ботом
-    stored_feedback = storage.get(f'fbk-{support_msg_id}')
-    stored_feedback = json.loads(stored_feedback)
-    r = send_message(f'{stored_feedback["chat_id"]}', msg['text'], reply_to=stored_feedback["message_id"])
-    print(r)
+    answered_msg = msg['reply_to_message']
+    if answered_msg['from']['is_bot']:
+        support_msg_id = str(answered_msg['message_id'])
+        # получение сохраненного информации о сообщении для ответа
+        stored_feedback = storage.get(f'fbk-{support_msg_id}')
+        if stored_feedback:
+            print(f'handle answer from support')
+            stored_feedback = json.loads(stored_feedback)
+            r = send_message(f'{stored_feedback["chat_id"]}', msg['text'], reply_to=stored_feedback["message_id"])
+            print(r)
 
diff --git a/tgbot/handlers/handle_join_request.py b/tgbot/handlers/handle_join_request.py
index ca60650..8c5ed07 100644
--- a/tgbot/handlers/handle_join_request.py
+++ b/tgbot/handlers/handle_join_request.py
@@ -1,6 +1,6 @@
 from tgbot.api import approve_chat_join_request, delete_message           
 from tgbot.handlers.send_button import show_request_msg
-from tgbot.storage import Profile
+from tgbot.storage import Profile, storage
 
 
 def handle_join_request(msg):
@@ -11,13 +11,13 @@ def handle_join_request(msg):
 
     if len(actor['parents']) == 0:
         # показываем сообщение с кнопкой "поручиться"
-        request_msg_id = show_request_msg(msg)
+        btn_msg_id = show_request_msg(msg)
         # удаляем предыдущее сообщение с кнопкой в этом чате
-        if actor['request_msg_id'].startswith(chat_id):
-            chat_id, rmid = actor['request_msg_id'].split(':')
-            r = delete_message(chat_id, rmid)
+        prev_msg_id = storage.get(f'btn-{chat_id}-{from_id}')
+        if prev_msg_id:
+            r = delete_message(chat_id, prev_msg_id)
             print(r)
-        actor['request_msg_id'] = f'{chat_id}:{request_msg_id}'
+        storage.set(f'btn-{chat_id}-{from_id}', btn_msg_id)
     else:
         # за пользователя поручились ранее
         r = approve_chat_join_request(chat_id, from_id)
diff --git a/tgbot/handlers/handle_members_change.py b/tgbot/handlers/handle_members_change.py
index 85f0412..6d13ddb 100644
--- a/tgbot/handlers/handle_members_change.py
+++ b/tgbot/handlers/handle_members_change.py
@@ -1,6 +1,6 @@
 from tgbot.handlers.send_button import show_request_msg
 from tgbot.api import unmute_member, mute_member, delete_message
-from tgbot.storage import Profile
+from tgbot.storage import Profile, storage
 
 def handle_join(msg):
     chat_id = str(msg['chat']['id'])
@@ -12,15 +12,13 @@ def handle_join(msg):
     if from_id == newcomer_id:
         if len(actor['parents']) == 0:
             # показываем сообщение с кнопкой "поручиться"
-            request_msg_id = show_request_msg(msg)
+            btn_msg_id = show_request_msg(msg)
+            storage.set(f'btn-{chat_id}-{from_id}', btn_msg_id)
 
             # до одобрения - мьют
             r = mute_member(chat_id, newcomer_id)
             print(r)
 
-            # обновляем профиль присоединившегося
-            actor['request_msg_id'] = f'{chat_id}:{request_msg_id}'
-            Profile.save(actor)
         else:
             # за пользователя поручились ранее
             pass
@@ -44,14 +42,11 @@ def handle_left(msg):
     member_id = msg["left_chat_member"]["id"]
     chat_id = msg['chat']['id']
 
-    # профиль покидающего чат
-    leaver = Profile.get(member_id)
-
     # удаление сообщения с кнопкой в этом чате
-    if leaver['request_msg_id'].startswith(chat_id):
-        chat_id, rmid = leaver['request_msg_id'].split(':')
-        r = delete_message(chat_id, rmid)
+    prev_msg_id = storage.get(f'btn-{chat_id}-{member_id}')
+    if prev_msg_id:
+        r = delete_message(chat_id, prev_msg_id)
         print(r)
+        storage.remove(f'btn-{chat_id}-{member_id}')
 
-    Profile.leaving(leaver)
 
diff --git a/tgbot/handlers/send_button.py b/tgbot/handlers/send_button.py
index a6a20ac..b847272 100644
--- a/tgbot/handlers/send_button.py
+++ b/tgbot/handlers/send_button.py
@@ -1,6 +1,6 @@
 from tgbot.api import send_message
 from tgbot.config import BUTTON_VOUCH, NEWCOMER_MSG
-from tgbot.utils import mention
+from tgbot.utils.mention import mention
 
 def show_request_msg(msg):
     reply_markup = {
@@ -20,8 +20,6 @@ def show_request_msg(msg):
         reply_to=msg.get('message_id', ''),
         reply_markup=reply_markup
     )
-    request_msg_id = r['result']['message_id']
-    chat_id = msg['chat']['id']
-    print(r)
-    print(f'request message id: {chat_id}:{request_msg_id}')
-    return request_msg_id
+    btn_msg_id = r['result']['message_id']
+    print(f'request message id: {btn_msg_id}')
+    return btn_msg_id
diff --git a/tgbot/storage/__init__.py b/tgbot/storage/__init__.py
index 9aba69f..c82adfa 100644
--- a/tgbot/storage/__init__.py
+++ b/tgbot/storage/__init__.py
@@ -2,7 +2,7 @@ import redis
 from tgbot.storage.profile import Profile as ProfileObj
 from tgbot.config import REDIS_URL
 
-# сохраняет сессии и пересылаемые сообщения между перезагрузками
+# сохраняет сессии, айди кнопок в чатах для удаления и пересылаемые сообщения между перезагрузками
 storage = redis.from_url(REDIS_URL)
 
 # хранение необходимой информации о пользователях
diff --git a/tgbot/storage/profile.py b/tgbot/storage/profile.py
index 5b0fc77..2099180 100644
--- a/tgbot/storage/profile.py
+++ b/tgbot/storage/profile.py
@@ -9,7 +9,6 @@ class Profile:
     def create(self, member_id, msg=None):
         s = {
             "id": member_id,
-            "request_msg_id": 0,
             "parents": [],
             "children": [],
             "chats": []
@@ -38,7 +37,3 @@ class Profile:
         else:
             r = json.loads(data)
         return r
-
-    def leaving(self, s):
-        if len(s['parents']) == 0:
-            self.storage.delete(f'usr-{s["id"]}')