diff --git a/.gitignore b/.gitignore
index 08593ea..541f197 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@ sessions
 .*.swp
 .*.swo
 config.json
+modstorage*
diff --git a/config.py b/config.py
index 9639469..f406d79 100644
--- a/config.py
+++ b/config.py
@@ -1,6 +1,7 @@
 ''' Config reader '''
 
 import json
+import utils
 
 def read_config(path: str) -> dict | None:
     ''' Read config '''
@@ -30,11 +31,10 @@ def read_config(path: str) -> dict | None:
     required_fields = {
         'login': [str]
     }
-    optional_fields = {
-        'mod_basic': ([bool], True),
-        'mod_eternal_online': ([bool], False),
-        'mod_video_downloader': ([bool], False)
-    }
+    optional_fields = {}
+    for mod_name in utils.get_all_mods():
+        optional_fields[mod_name] = ([bool], False)
+    optional_fields['mod_basic'] = ([bool], True)
     try:
         j = None
         with open(path, 'r') as f:
diff --git a/hubot.py b/hubot.py
index 5231b8b..adffc8f 100644
--- a/hubot.py
+++ b/hubot.py
@@ -236,3 +236,6 @@ def unset_mods() -> None:
     ''' Remove available mods. '''
     global _mods
     _mods = {}
+
+def get_all_sessions() -> dict:
+    return sessions
diff --git a/mod_basic.py b/mod_basic.py
index 0b88ce4..32e84c8 100644
--- a/mod_basic.py
+++ b/mod_basic.py
@@ -3,7 +3,7 @@
 import asyncio
 
 from telethon import events
-from telethon.tl.types import PeerUser
+from telethon.tl.types import PeerUser, PeerChat, PeerChannel
 
 import utils
 
@@ -25,7 +25,7 @@ def mod_get_mighty() -> bool:
 
 def mod_get_tags() -> None:
     ''' Get tags used by the mod '''
-    return ['base']
+    return ['base', 'base_peerid']
 
 async def mod_new_message(session, event) -> None:
     ''' Handle new message '''
@@ -35,21 +35,35 @@ async def mod_new_message(session, event) -> None:
         # not outgoing - do not process
         if not msg.out:
             return
-        # peer must be user
-        peer = msg.peer_id
-        if type(peer) is not PeerUser:
-            return
 
         # get the text
-        text = msg.message
+        text = None
+        try:
+            text = msg.message
+            if not text:
+                return
+        except:
+            return
         # get args
-        args = [i for i in text.split(' ') if i][1:]
+        args = [i for i in text.split(' ') if i]
+        # cmd and args
+        cmd = args[0].lower()
+        args = args[1:]
         # no args
-        if not args:
+        if cmd == 'base':
+            if args:
+                return
             response_text = 'tg-utility available mods:'
             mods = utils.get_all_mods()
             for mod in mods:
                 response_text += '\n  - %s' % mod
+            response_text += '\n\nmod_basic commands:'
+            response_text += '\n  - base_peerid - get peer ID of current chat'
             await event.reply(message=response_text)
+        elif cmd == 'base_peerid':
+            if args:
+                return
+            peer = msg.peer_id
+            await event.reply(message=utils.peer_to_id(msg.peer_id))
     except:
         utils.pex()
diff --git a/mod_chat_sanitizer.py b/mod_chat_sanitizer.py
new file mode 100644
index 0000000..fdf4e1b
--- /dev/null
+++ b/mod_chat_sanitizer.py
@@ -0,0 +1,695 @@
+''' Chat sanitizer deletes messages with blacklisted words
+    (unless they have whitelisted words)
+'''
+
+import json
+import time
+import asyncio
+import traceback
+
+from telethon import events
+from telethon.tl.types import PeerUser
+
+from telethon.errors import FloodWaitError, ForbiddenError, BadRequestError
+
+import hubot
+import robot
+import utils
+
+# 30 minutes
+FLOOD_SLEEP_TIME = 60 * 30
+VIOLENT_PACK_SIZE = 100
+
+_config = None
+
+_mod_config = {}
+_workers = {}
+
+async def bad_funct() -> None:
+    return 5 / 0
+
+async def _violent_worker(data: dict) -> None:
+    ''' Coroutine for violent sanitization '''
+    session = data['session']
+    client = session['client']
+    # task to wait for stop event
+    stop_t = asyncio.create_task(data['stop_event'].wait())
+    # continue operation?
+    to_work = True
+
+    # target peer
+    target_peer = utils.id_to_peer(data['target_chat_id'])
+    # report-to peer
+    report_peer = utils.id_to_peer(data['report_chat_id'])
+    # current messages offset
+    messages_offset = data['start_from_id'] - VIOLENT_PACK_SIZE
+
+    blacklist = list(_mod_config[session['name']]['chats'][data['target_chat_id']]['blacklist'])
+    whitelist = list(_mod_config[session['name']]['chats'][data['target_chat_id']]['whitelist'])
+
+    notify_in = 10000
+    
+    # work while allowed to
+    while to_work:
+        messages_offset += VIOLENT_PACK_SIZE
+        # time to sleep after everything
+        time_to_sleep = 3
+        # message getting task
+        msgs_t = asyncio.create_task(client.get_messages(target_peer, offset_id=messages_offset, limit=VIOLENT_PACK_SIZE, reverse=True))
+        # wait for tasks
+        done, pending = await asyncio.wait([msgs_t, stop_t], return_when=asyncio.FIRST_COMPLETED)
+        # to stop
+        if stop_t in done:
+            try:
+                msgs_t.cancel()
+            except:
+                pass
+            await client.send_message(report_peer, message='mod_chat_sanitizer:\n\nStopping by user request... Offset: %s' % messages_offset)
+            to_work = False
+            break
+        if notify_in <= 0:
+            notify_in = 10000
+            await client.send_message(report_peer, message='mod_chat_sanitizer:\n\nProcessed some messages. Current offset: %s' % (messages_offset))
+        # messages to delete
+        messages_to_delete = []
+        # messages checker
+        try:
+            do_not_continue = False
+            try:
+                e = msgs_t.exception()
+                if e is not None:
+                    et = type(e)
+                    if et is FloodWaitError:
+                        await client.send_message(report_peer, message='mod_chat_sanitizer:\n\nFloodWaitError for get_messages. Sleeping for %s seconds. Offset: %s' % (e.seconds, messages_offset))
+                        time_to_sleep = e.seconds + 1
+                    elif et is ForbiddenError:
+                        await client.send_message(report_peer, message='mod_chat_sanitizer:\n\nForbiddenError - probably permissions were revoked. Stopping... Offset: %s' % messages_offset)
+                        to_work = False
+                        break
+                    do_not_continue = True
+            except:
+                pass
+            if do_not_continue:
+                raise Exception('do not continue this check')
+            # get the results
+            res = msgs_t.result()
+            # no more messages
+            if len(res) == 0:
+                await client.send_message(report_peer, message='mod_chat_sanitizer:\n\nLooks like no new messages. Stopping... Offset: %s' % messages_offset)
+                to_work = False
+                break
+            for i in range(len(res)):
+                try:
+                    # check if text is forbidden
+                    if res[i].text:
+                        if is_text_forbidden(res[i].message.lower(), blacklist, whitelist):
+                            messages_to_delete.append(res[i].id)
+                            continue
+                    # names are not to be checked
+                    if not data['check_names']:
+                        continue
+                    # check if username is forbidden
+                    try:
+                        sender = await res[i].get_sender()
+                        name = sender.first_name
+                        if name:
+                            if sender.last_name is not None:
+                                name += ' ' + sender.last_name
+                            if is_text_forbidden(name.lower(), blacklist, whitelist):
+                                messages_to_delete.append(res[i].id)
+                                continue
+                    except:
+                        pass
+                    # check if forwared from forbidden person
+                    try:
+                        fwd = res[i].forward
+                        if fwd is not None:
+                            ofwd = fwd.original_fwd
+                            name_to_check = None
+                            # privacy settings?
+                            if ofwd.from_name is not None or ofwd.saved_from_name is not None:
+                                name_to_check = ofwd.from_name if ofwd.from_name is not None else ofwd.saved_from_name
+                            else:
+                                sender = await fwd.get_sender()
+                                if sender is None:
+                                    continue
+                                name_to_check = sender.first_name
+                                if name_to_check:
+                                    if sender.last_name is not None:
+                                        name_to_check += ' ' + sender.last_name
+                            if name_to_check is not None and is_text_forbidden(name_to_check.lower(), blacklist, whitelist):
+                                messages_to_delete.append(res[i].id)
+                                continue
+                    except:
+                        utils.pex()
+                except:
+                    utils.pex()
+                    pass
+        except:
+            utils.pex()
+        # delete the messages
+        try:
+            if messages_to_delete:
+                await client.delete_messages(target_peer, messages_to_delete, revoke=True)
+                _mod_config[session['name']]['chats'][data['target_chat_id']]['deleted_count'] += len(messages_to_delete)
+        except FloodWaitError as e:
+            await client.send_message(report_peer, message='mod_chat_sanitizer:\n\nFloodWaitError for get_messages. Sleeping for %s seconds. Offset: %s' % (e.seconds, messages_offset))
+            time_to_sleep = e.seconds + 1
+        except ForbiddenError:
+            await client.send_message(report_peer, message='mod_chat_sanitizer:\n\nForbiddenError - probably permissions were revoked. Stopping... Offset: %s' % messages_offset)
+            to_work = False
+            break
+        except:
+            utils.pex()
+
+        # wait for timer
+        t_t = asyncio.create_task(asyncio.sleep(time_to_sleep))
+        done, pending = await asyncio.wait([t_t, stop_t], return_when=asyncio.FIRST_COMPLETED)
+        if stop_t in done:
+            try:
+                t_t.cancel()
+            except:
+                pass
+            await client.send_message(report_peer, message='mod_chat_sanitizer:\n\nStopping by user request... Offset: %s' % messages_offset)
+            to_work = False
+            break
+
+
+def mod_load_config(path: str = 'modstorage_mcs/config.json') -> bool:
+    ''' Load mod config from file '''
+    global _mod_config
+    try:
+        j = None
+        with open(path, 'r') as f:
+            j = json.loads(f.read())
+        # failure?
+        if j is None:
+            return False
+        # just save
+        _mod_config = j
+        return True
+    except:
+        return False
+
+def mod_save_config(path: str = 'modstorage_mcs/config.json') -> bool:
+    ''' Save mod config to file '''
+    try:
+        with open(path, 'w') as f:
+            f.write(json.dumps(_mod_config, indent=4))
+        return True
+    except:
+        return False
+
+def mod_get_config_for_session(session_name) -> dict:
+    ''' Get config for session '''
+    # check if config for the session exists
+    if session_name in _mod_config:
+        return _mod_config[session_name]
+    # does not exist - generate one
+    c = {
+        'chats': {},
+        'unlock_timestamp': 0.0
+    }
+    _mod_config[session_name] = c
+    return c
+
+def is_text_forbidden(text, blacklist, whitelist) -> bool:
+    ''' Returns True or False '''
+    # check if has blacklisted content
+    for word in blacklist:
+        if word in text:
+            break
+    else:
+        return False
+    # check if has whitelisted content
+    for word in whitelist:
+        # whitelisted content exists
+        if word in text:
+            return False
+    # forbidden
+    return True
+
+def create_violent_worker(session, target_chat_id: int, report_chat_id: int, start_from_id: int, check_names: bool = True) -> bool:
+    ''' Creates agressive message sanitizer. Returns True on success.
+        Does not succeed if chat is already being sanitized.
+    '''
+    # add to workers if not added yet
+    if session['name'] not in _workers:
+        _workers[session['name']] = {}
+    # db
+    session_workers = _workers[session['name']]
+    # chat is already being sanitized
+    if target_chat_id in session_workers:
+        # check if active
+        if not session_workers[target_chat_id]['task'].done():
+            return False
+    # create worker for chat
+    worker = {
+        'session': session,
+        'target_chat_id': target_chat_id,
+        'report_chat_id': report_chat_id,
+        'start_from_id': start_from_id,
+        'check_names': check_names,
+        'stop_event': asyncio.Event(),
+        'task': None
+    }
+    # create the task
+    worker['task'] = asyncio.create_task(_violent_worker(worker))
+    # save
+    session_workers[target_chat_id] = worker
+    return True
+
+def is_worker_active(session, target_chat_id: int) -> bool:
+    ''' Returns True if chat is being sanitized '''
+    if session['name'] not in _workers:
+        return False
+    if target_chat_id not in _workers[session['name']]:
+        return False
+    d = _workers[session['name']][target_chat_id]
+    return not d['task'].done()
+
+async def stop_violent_worker(worker: dict) -> None:
+    ''' Stop the worker right now. '''
+    # already stopped
+    try:
+        if worker['task'].done():
+            return
+        # stop
+        try:
+            worker['stop_event'].set()
+            await worker['task']
+        except:
+            utils.pex()
+    except:
+        utils.pex()
+
+async def stop_all_violent_workers(session_name: str | None = None) -> None:
+    ''' Stop all workers. '''
+    workers_to_stop = []
+    # session name is not set - stop all
+    if not session_name:
+        for session in _workers:
+            workers = _workers[session]
+            for wname in workers:
+                workers_to_stop.append(workers[wname])
+    # session name is set
+    else:
+        if session_name not in _workers:
+            return
+        for wname in _workers[session_name]:
+            workers_to_stop.append(_workers[session_name][wname])
+    # stop all
+    for w in workers_to_stop:
+        await stop_violent_worker(w)
+
+async def msg_outgoing(session, event) -> None:
+    ''' Handle outgoing message '''
+    global _mod_config
+    # get the message and session config
+    msg = event.message
+    cfg = mod_get_config_for_session(session['name'])
+    # get the text
+    text = None
+    try:
+        text = msg.message
+        if not text:
+            return
+    except:
+        return
+    # get args
+    args = [i for i in text.split(' ') if i]
+    # cmd and args
+    cmd = args[0].lower()
+    args = args[1:]
+    # help
+    if cmd == 'mcs':
+        if args:
+            return
+        response_text = 'mod_chat_sanitizer commands:\n'
+        response_text += '\n⚪️ mcs - get this help message'
+        response_text += '\n⚪️ mcs_rst - reset mod\'s storage. Deletes settings for ALL added accounts.'
+        response_text += '\n⚪️ mcs_list - list all chats added to sanitization mod'
+        response_text += '\n⚪️ mcs_add <CHAT_ID> - add chat to sanitization mod'
+        response_text += '\n⚪️ mcs_del <CHAT_ID> - delete chat from sanitization mod'
+        response_text += '\n⚪️ mcs_off <CHAT_ID or \'ALL\'> - turn sanitization OFF for chat (or all chats)'
+        response_text += '\n⚪️ mcs_on <CHAT_ID or \'ALL\'> - turn sanitization ON for chat (or all chats)'
+        response_text += '\n⚪️ mcs_ultraviolence <CHAT_ID> [START_FROM_ID] - perform complete sanitization of chat (reports will be sent to chat, where the command was executed)'
+        response_text += '\n⚪️ mcs_stopit <CHAT_ID or \'ALL\'> - stop ultraviolence'
+        response_text += '\n⚪️ mcs_bl <CHAT_ID> [new blacklist, one word per line] - set new blacklist for chat (or show current blacklist)'
+        response_text += '\n⚪️ mcs_wl <CHAT_ID> [new whilelist, one word per line] - like blacklist, but whitelist'
+        response_text += '\n\nIf chat is added and enabled, then new messages will be sanitized.'
+        response_text += ' If \'ultraviolence\' is induced, the entire chat history is sanitized, starting from START_FROM_ID (or 0, if not specified).'
+        response_text += ' The message will be deleted if it contains substrings from blacklist AND it does NOT contain substrings from whitelist.'
+        await event.reply(message=response_text)
+    # config reset
+    if cmd == 'mcs_rst':
+        _mod_config = {}
+        await mod_save_config()
+        await event.reply(message='Configuration for mod_chat_sanitizer is reset')
+        return
+    # list all chats
+    if cmd == 'mcs_list':
+        response = 'Chat list (IDs):'
+        if cfg['chats']:
+            for id in cfg['chats']:
+                chat = cfg['chats'][id]
+                response += '\n\n- Chat %s' % id
+                response += '\nEnabled: %s' % chat['state']
+                response += '\nDeleted (all time): %s' % chat['deleted_count']
+                response += '\nLast deleted ID: %s' % chat['last_deleted_id']
+                response += '\nBlacklist size: %s' % len(chat['blacklist'])
+                response += '\nWhitelist size: %s' % len(chat['whitelist'])
+        else:
+            response += '\n  no chats added'
+        await event.reply(message=response)
+        return
+    # add chat
+    if cmd == 'mcs_add':
+        chat_id = None
+        try:
+            chat_id = str(args[0])
+        except:
+            await event.reply(message='mcs_add [CHAT_ID]')
+            return
+        if chat_id in cfg['chats']:
+            await event.reply(message='Chat #%s is already added' % chat_id)
+            return
+        # add the chat
+        cfg['chats'][chat_id] = {
+            'state': False,
+            'deleted_count': 0,
+            'last_deleted_id': None,
+            'blacklist': [],
+            'whitelist': []
+        }
+        # save the config
+        mod_save_config()
+        await event.reply(message='Chat #%s is added' % chat_id)
+        return
+    # delete chat
+    if cmd == 'mcs_del':
+        chat_id = None
+        try:
+            chat_id = str(args[0])
+        except:
+            await event.reply(message='mcs_del [CHAT_ID]')
+            return
+        if chat_id not in cfg['chats']:
+            await event.reply(message='Chat #%s is not added, so not deleted' % chat_id)
+            return
+        if is_worker_active(session, chat_id):
+            await event.reply(message='Chat #%s is being violently sanitized, so not deleted' % chat_id)
+            return
+        # remove the chat
+        del cfg['chats'][chat_id]
+        # save the config
+        mod_save_config()
+        await event.reply(message='Chat #%s is deleted' % chat_id)
+        return
+    # disable chat
+    if cmd == 'mcs_off':
+        chat_id = None
+        try:
+            chat_id = str(args[0])
+        except:
+            await event.reply(message='mcs_off [CHAT_ID]')
+            return
+        if chat_id not in cfg['chats']:
+            await event.reply(message='Chat #%s is not added' % chat_id)
+            return
+        if not cfg['chats'][chat_id]['state']:
+            await event.reply(message='Chat #%s is already disabled' % chat_id)
+            return
+        cfg['chats'][chat_id]['state'] = False
+        mod_save_config()
+        await event.reply(message='Chat #%s is disabled (not sanitized anymore)' % chat_id)
+        return
+    # enable chat
+    if cmd == 'mcs_on':
+        chat_id = None
+        try:
+            chat_id = str(args[0])
+        except:
+            await event.reply(message='mcs_on [CHAT_ID]')
+            return
+        if chat_id not in cfg['chats']:
+            await event.reply(message='Chat #%s is not added' % chat_id)
+            return
+        if cfg['chats'][chat_id]['state']:
+            await event.reply(message='Chat #%s is already enabled' % chat_id)
+            return
+        cfg['chats'][chat_id]['state'] = True
+        mod_save_config()
+        await event.reply(message='Chat #%s is enabled (sanitized from now on)' % chat_id)
+        return
+    # agressive sanitization
+    if cmd == 'mcs_ultraviolence':
+        chat_id = None
+        start_from = 0
+        try:
+            chat_id = str(args[0])
+        except:
+            await event.reply(message='mcs_ultraviolence <CHAT_ID> [START_FROM_ID]')
+            return
+        # check if start_from is specified
+        if len(args) >= 2:
+            try:
+                start_from = int(args[1])
+                if start_from < 0:
+                    raise Exception('<0')
+            except:
+                await event.reply(message='START_FROM_ID must be >= 0')
+                return
+        if chat_id not in cfg['chats']:
+            await event.reply(message='Chat %s is not added' % chat_id)
+            return
+        if is_worker_active(session, chat_id):
+            await event.reply(message='Chat %s is already being violently sanitized, so not starting again' % chat_id)
+            return
+        if not cfg['chats'][chat_id]['blacklist']:
+            await event.reply(message='Chat %s has empty blacklist - refusing to start' % chat_id)
+            return
+        # start
+        if create_violent_worker(session, chat_id, utils.peer_to_id(msg.peer_id), start_from):
+            await event.reply(message='Started violent sanitization of chat %s' % chat_id)
+        else:
+            await event.reply(message='Failed to start violent sanitization of chat %s' % chat_id)
+        return
+    # stop sanitization
+    if cmd == 'mcs_stopit':
+        chat_id = None
+        try:
+            if args[0].lower() == 'all':
+                chat_id = 'all'
+            else:
+                chat_id = str(args[0])
+        except:
+            await event.reply(message='mcs_stopit <CHAT_ID or \'ALL\'>')
+            return
+        # all
+        if chat_id == 'all':
+            await event.reply(message='Stopping violent sanitization of all chats...')
+            await stop_all_violent_workers(session['name'])
+            await event.reply(message='Violent sanitization of all chats is stopped')
+            return
+        # stop only one
+        if not is_worker_active(session, chat_id):
+            await event.reply(message='Chat %s is not being violently sanitized, so not stopping (no need to stop - not doing anything)' % chat_id)
+            return
+        # get the worker
+        w = _workers[session['name']][chat_id]
+        await event.reply(message='Stopping violent sanitization of chat %s...' % chat_id)
+        await stop_violent_worker(w)
+        await event.reply(message='Violent sanitization of chat %s is stopped' % chat_id)
+        return
+    # modify blacklist
+    if cmd == 'mcs_bl':
+        # lines
+        lines = [i.strip() for i in text.split('\n') if i.strip()]
+        args = lines[0].split(' ')
+        lines = lines[1:]
+
+        cmd = args[0].lower()
+        args = args[1:]
+        # get the chat ID
+        chat_id = None
+        try:
+            chat_id = str(args[0])
+        except:
+            await event.reply(message='Syntax:\n\nmcs_bl <CHAT_ID>\nsubstr1\nsubstr2\nsubstr3\n...\n\nYou may omit substrings to read current blacklist')
+            return
+        # no such chat
+        if chat_id not in cfg['chats']:
+            await event.reply(message='Chat #%s is not added' % chat_id)
+            return
+        # less than one line - log existsing
+        if len(lines) < 1:
+            response = 'Blacklist for chat #%s:\n' % chat_id
+            if not cfg['chats'][chat_id]['blacklist']:
+                response = 'Blacklist for chat #%s is empty' % chat_id
+            else:
+                for m in cfg['chats'][chat_id]['blacklist']:
+                    response += '\n' + m
+            await event.reply(message=response)
+            return
+        # create new blacklist
+        cfg['chats'][chat_id]['blacklist'] = []
+        for l in [i.lower() for i in lines]:
+            if l in cfg['chats'][chat_id]['blacklist']:
+                continue
+            cfg['chats'][chat_id]['blacklist'].append(l)
+        mod_save_config()
+        # create response
+        response = 'New blacklist content for chat %s:\n' % chat_id
+        for l in cfg['chats'][chat_id]['blacklist']:
+            response += '\n%s' % l
+        await event.reply(message=response)
+        return
+    # modify whitelist
+    if cmd == 'mcs_wl':
+        # lines
+        lines = [i.strip() for i in text.split('\n') if i.strip()]
+        args = lines[0].split(' ')
+        lines = lines[1:]
+
+        cmd = args[0].lower()
+        args = args[1:]
+        # get the chat ID
+        chat_id = None
+        try:
+            chat_id = str(args[0])
+        except:
+            await event.reply(message='Syntax:\n\nmcs_wl <CHAT_ID>\nsubstr1\nsubstr2\nsubstr3\n...\n\nYou may omit substrings to read current whitelist')
+            return
+        # no such chat
+        if chat_id not in cfg['chats']:
+            await event.reply(message='Chat #%s is not added' % chat_id)
+            return
+        # less than one line - log existsing
+        if len(lines) < 1:
+            response = 'Whitelist for chat #%s:\n' % chat_id
+            if not cfg['chats'][chat_id]['whitelist']:
+                response = 'Whitelist for chat #%s is empty' % chat_id
+            else:
+                for m in cfg['chats'][chat_id]['whitelist']:
+                    response += '\n' + m
+            await event.reply(message=response)
+            return
+        # create new whitelist
+        cfg['chats'][chat_id]['whitelist'] = []
+        for l in [i.lower() for i in lines]:
+            if l in cfg['chats'][chat_id]['whitelist']:
+                continue
+            cfg['chats'][chat_id]['whitelist'].append(l)
+        mod_save_config()
+        # create response
+        response = 'New whitelist content for chat %s:\n' % chat_id
+        for l in cfg['chats'][chat_id]['whitelist']:
+            response += '\n%s' % l
+        await event.reply(message=response)
+        return
+
+async def msg_incoming(session, event) -> None:
+    ''' Handle outgoing message '''
+    global _mod_config
+    cfg = mod_get_config_for_session(session['name'])
+    # locked currently
+    if time.time() < cfg['unlock_timestamp']:
+        return
+
+    # get the message and session config
+    msg = event.message
+    # get the text
+    text = None
+    try:
+        text = msg.message
+        if not text:
+            return
+    except:
+        return
+    # get chat id
+    chat_id = utils.peer_to_id(msg.peer_id)
+    # not added
+    if chat_id not in cfg['chats']:
+        return
+    # disabled
+    if not cfg['chats'][chat_id]['state']:
+        return
+    # text is not forbidden
+    if not is_text_forbidden(text, cfg['chats'][chat_id]['blacklist'], cfg['chats'][chat_id]['whitelist']):
+        return
+    
+    # delete the message
+    try:
+        await asyncio.sleep(5)  # to evade bot detection
+        # we may get locked during timeout above
+        if time.time() < cfg['unlock_timestamp']:
+            return
+        await msg.delete()
+        cfg['chats'][data['target_chat_id']]['deleted_count'] += 1
+    except BadRequestError:
+        pass
+    except ForbiddenError as e:
+        cfg['chats'][chat_id]['state'] = False
+        await robot.send_to_admin('mod_chat_sanitizer ForbiddenError, disabling chat\n\nsession_name = %s\nchat_id = %s' % (session['name'], chat_id))
+    except FloodWaitError as e:
+        cfg['unlock_timestamp'] = time.time() + e.seconds + 1
+        await robot.send_to_admin(
+            'mod_chat_sanitizer FloodWaitError:\n\nsession_name = %s\nchat_id = %s\nwait_for = %s' % ( \
+                session['name'], \
+                chat_id, \
+                e.seconds \
+            ) \
+        )
+    except:
+        cfg['unlock_timestamp'] = time.time() + FLOOD_SLEEP_TIME
+        await robot.send_to_admin(
+            'mod_chat_sanitizer exception:\n\nsession_name = %s\nchat_id = %s\n\n%s' % ( \
+                session['name'], \
+                chat_id, \
+                traceback.format_exc() \
+            ) \
+        )
+    
+
+async def mod_init(config: dict) -> bool:
+    ''' Initialize the mod '''
+    global _config
+    _config = config
+    # create directories
+    utils.ensure_dir('modstorage_mcs')
+    # try to load config
+    if not mod_load_config('modstorage_mcs/config.json'):
+        print('[!] mod_chat_sanitizer has failed to load config, regenerating...')
+        mod_save_config('modstorage_mcs/config.json')
+    print('[I] mod_chat_sanitizer is initialized')
+
+async def mod_deinit() -> None:
+    ''' Deinitialize the mod '''
+    await stop_all_violent_workers()
+    mod_save_config('modstorage_mcs/config.json')
+    print('[I] mod_chat_sanitizer is deinitialized')
+
+def mod_get_mighty() -> bool:
+    ''' Mod is called 'mighty' if it receives all messages '''
+    return True
+
+def mod_get_tags() -> None:
+    ''' Get tags used by the mod '''
+    return ['mcs']
+
+async def mod_new_message(session, event) -> None:
+    ''' Handle new message '''
+    # WARNING: this mod is defined as mighty, so the messages must be
+    # really filtered well.
+    try:
+        # get the message
+        msg = event.message
+        # outgoing - handle
+        if msg.out:
+            await msg_outgoing(session, event)
+            return
+        # incoming - handle
+        await msg_incoming(session, event)
+    except:
+        utils.pex()
diff --git a/utils.py b/utils.py
index f3d8314..9273aad 100644
--- a/utils.py
+++ b/utils.py
@@ -8,6 +8,8 @@ import hashlib
 import mimetypes
 import traceback
 
+from telethon.tl.types import PeerUser, PeerChat, PeerChannel
+
 def pex() -> None:
     ''' Print last exception '''
     traceback.print_exc()
@@ -69,3 +71,27 @@ def rm_glob(path_glob: str) -> None:
                 pass
     except:
         pass
+
+def id_to_peer(id: str):
+    s = id[0]
+    try:
+        if s == 'u':
+            return PeerUser(user_id=int(id[1:]))
+        elif s == 'c':
+            return PeerChat(chat_id=int(id[1:]))
+        elif s == 's':
+            return PeerChannel(channel_id=int(id[1:]))
+        else:
+            return int(id)
+    except:
+        return 'me'
+
+def peer_to_id(peer) -> str:
+    t = type(peer)
+    if t is PeerUser:
+        return 'u%s' % peer.user_id
+    elif t is PeerChat:
+        return 'c%s' % peer.chat_id
+    elif t is PeerChannel:
+        return 's%s' % peer.channel_id
+    return str(peer)