diff --git a/pytchat/tool/mining/__init__.py b/pytchat/tool/mining/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/pytchat/tool/mining/asyncdl.py b/pytchat/tool/mining/asyncdl.py
deleted file mode 100644
index 8bb1bc3..0000000
--- a/pytchat/tool/mining/asyncdl.py
+++ /dev/null
@@ -1,146 +0,0 @@
-
-import httpx
-import asyncio
-import json
-from . import parser
-from . block import Block
-from . worker import ExtractWorker
-from . patch import Patch
-from ... import config
-from ... paramgen import arcparam_mining as arcparam
-from concurrent.futures import CancelledError
-from urllib.parse import quote
-
-headers = config.headers
-REPLAY_URL = "https://www.youtube.com/live_chat_replay?continuation="
-INTERVAL = 1
-
-
-def _split(start, end, count, min_interval_sec=120):
-    """
-    Split section from `start` to `end` into `count` pieces,
-    and returns the beginning of each piece.
-    The `count` is adjusted so that the length of each piece
-    is no smaller than `min_interval`.
-
-    Returns:
-    --------
-        List of the offset of each block's first chat data.
-    """
-
-    if not (isinstance(start, int) or isinstance(start, float)) or \
-       not (isinstance(end, int) or isinstance(end, float)):
-        raise ValueError("start/end must be int or float")
-    if not isinstance(count, int):
-        raise ValueError("count must be int")
-    if start > end:
-        raise ValueError("end must be equal to or greater than start.")
-    if count < 1:
-        raise ValueError("count must be equal to or greater than 1.")
-    if (end - start) / count < min_interval_sec:
-        count = int((end - start) / min_interval_sec)
-        if count == 0:
-            count = 1
-    interval = (end - start) / count
-
-    if count == 1:
-        return [start]
-    return sorted(list(set([int(start + interval * j)
-                            for j in range(count)])))
-
-
-def ready_blocks(video_id, duration, div, callback):
-    if div <= 0:
-        raise ValueError
-
-    async def _get_blocks(video_id, duration, div, callback):
-        async with httpx.ClientSession() as session:
-            tasks = [_create_block(session, video_id, seektime, callback)
-                     for seektime in _split(0, duration, div)]
-            return await asyncio.gather(*tasks)
-
-    async def _create_block(session, video_id, seektime, callback):
-        continuation = arcparam.getparam(video_id, seektime=seektime)
-        url = (f"{REPLAY_URL}{quote(continuation)}&playerOffsetMs="
-               f"{int(seektime*1000)}&hidden=false&pbj=1")
-        async with session.get(url, headers=headers) as resp:
-            chat_json = await resp.text()
-        if chat_json is None:
-            return
-        continuation, actions = parser.parse(json.loads(chat_json)[1])
-        first = seektime
-        seektime += INTERVAL
-        if callback:
-            callback(actions, INTERVAL)
-        return Block(
-            continuation=continuation,
-            chat_data=actions,
-            first=first,
-            last=seektime,
-            seektime=seektime
-        )
-    """
-    fetch initial blocks.
-    """
-    loop = asyncio.get_event_loop()
-    blocks = loop.run_until_complete(
-        _get_blocks(video_id, duration, div, callback))
-    return blocks
-
-
-def fetch_patch(callback, blocks, video_id):
-
-    async def _allocate_workers():
-        workers = [
-            ExtractWorker(
-                fetch=_fetch, block=block,
-                blocks=blocks, video_id=video_id
-            )
-            for block in blocks
-        ]
-        async with httpx.ClientSession() as session:
-            tasks = [worker.run(session) for worker in workers]
-            return await asyncio.gather(*tasks)
-
-    async def _fetch(seektime, session) -> Patch:
-        continuation = arcparam.getparam(video_id, seektime=seektime)
-        url = (f"{REPLAY_URL}{quote(continuation)}&playerOffsetMs="
-               f"{int(seektime*1000)}&hidden=false&pbj=1")
-        async with session.get(url, headers=config.headers) as resp:
-            chat_json = await resp.text()
-        actions = []
-        try:
-            if chat_json is None:
-                return Patch()
-            continuation, actions = parser.parse(json.loads(chat_json)[1])
-        except json.JSONDecodeError:
-            pass
-        if callback:
-            callback(actions, INTERVAL)
-        return Patch(chats=actions, continuation=continuation,
-                     seektime=seektime, last=seektime)
-    """
-    allocate workers and assign blocks.
-    """
-    loop = asyncio.get_event_loop()
-    try:
-        loop.run_until_complete(_allocate_workers())
-    except CancelledError:
-        pass
-
-
-async def _shutdown():
-    print("\nshutdown...")
-    tasks = [t for t in asyncio.all_tasks()
-             if t is not asyncio.current_task()]
-    for task in tasks:
-        task.cancel()
-        try:
-            await task
-        except asyncio.CancelledError:
-            pass
-
-
-def cancel():
-    loop = asyncio.get_event_loop()
-    loop.create_task(_shutdown())
diff --git a/pytchat/tool/mining/block.py b/pytchat/tool/mining/block.py
deleted file mode 100644
index 40c95d1..0000000
--- a/pytchat/tool/mining/block.py
+++ /dev/null
@@ -1,62 +0,0 @@
-from . import parser
-class Block:
-    """Block object represents something like a box 
-    to join chunk of chatdata.
-
-    Parameter:
-    ---------
-    first : int :
-        videoOffsetTimeMs of the first chat_data 
-        (chat_data[0])
-        
-    last : int :
-        videoOffsetTimeMs of the last chat_data.
-        (chat_data[-1])
-
-        this value increases as fetching chatdata progresses.
-
-    end : int :
-        target videoOffsetTimeMs of last chat data for extract,
-        equals to first videoOffsetTimeMs of next block.
-        when extract worker reaches this offset, stop fetching.
-
-    continuation : str :
-        continuation param of last chat data.
-
-    chat_data : list 
-
-    done : bool :
-        whether this block has been fetched.
-    
-    remaining : int :
-        remaining data to extract.
-        equals end - last.
-    
-    is_last : bool :
-        whether this block is the last one in blocklist.
-
-    during_split : bool :
-        whether this block is in the process of during_split.
-        while True, this block is excluded from duplicate split procedure.
-    
-    seektime : float :
-        the last position of this block(seconds) already fetched.
-    """
-    
-    __slots__ = ['first','last','end','continuation','chat_data','remaining',
-        'done','is_last','during_split','seektime']
-
-    def __init__(self, first = 0, last = 0, end = 0,
-                continuation = '', chat_data = [], is_last = False,
-                during_split = False, seektime = None):
-        self.first = first
-        self.last = last
-        self.end = end
-        self.continuation = continuation
-        self.chat_data = chat_data
-        self.done = False
-        self.remaining = self.end - self.last
-        self.is_last = is_last
-        self.during_split = during_split
-        self.seektime = seektime
- 
diff --git a/pytchat/tool/mining/parser.py b/pytchat/tool/mining/parser.py
deleted file mode 100644
index f9a692f..0000000
--- a/pytchat/tool/mining/parser.py
+++ /dev/null
@@ -1,73 +0,0 @@
-import re
-from ... import config
-from ... exceptions import (
-    ResponseContextError,
-    NoContents, NoContinuation)
-
-logger = config.logger(__name__)
-
-
-def parse(jsn):
-    """
-    Parse replay chat data.
-    Parameter:
-    ----------
-    jsn : dict
-        JSON of replay chat data.
-    Returns:
-    ------
-        continuation : str
-        actions : list
-
-    """
-    if jsn is None:
-        raise ValueError("parameter JSON is None")
-    if jsn['response']['responseContext'].get('errors'):
-        raise ResponseContextError(
-            'video_id is invalid or private/deleted.')
-    contents = jsn["response"].get('continuationContents')
-    if contents is None:
-        raise NoContents('No chat data.')
-
-    cont = contents['liveChatContinuation']['continuations'][0]
-    if cont is None:
-        raise NoContinuation('No Continuation')
-    metadata = cont.get('liveChatReplayContinuationData')
-    if metadata:
-        continuation = metadata.get("continuation")
-        actions = contents['liveChatContinuation'].get('actions')
-        if continuation:
-            return continuation, [action["replayChatItemAction"]["actions"][0]
-                                  for action in actions
-                                  if list(action['replayChatItemAction']["actions"][0].values()
-                                          )[0]['item'].get("liveChatPaidMessageRenderer")
-                                  or list(action['replayChatItemAction']["actions"][0].values()
-                                          )[0]['item'].get("liveChatPaidStickerRenderer")
-                                  ]
-    return None, []
-
-
-def get_offset(item):
-    return int(item['replayChatItemAction']["videoOffsetTimeMsec"])
-
-
-def get_id(item):
-    return list((list(item['replayChatItemAction']["actions"][0].values()
-                      )[0])['item'].values())[0].get('id')
-
-
-def get_type(item):
-    return list((list(item['replayChatItemAction']["actions"][0].values()
-                      )[0])['item'].keys())[0]
-
-
-_REGEX_YTINIT = re.compile(
-    "window\\[\"ytInitialData\"\\]\\s*=\\s*({.+?});\\s+")
-
-
-def extract(text):
-
-    match = re.findall(_REGEX_YTINIT, str(text))
-    if match:
-        return match[0]
-    return None
diff --git a/pytchat/tool/mining/patch.py b/pytchat/tool/mining/patch.py
deleted file mode 100644
index 7666a52..0000000
--- a/pytchat/tool/mining/patch.py
+++ /dev/null
@@ -1,27 +0,0 @@
-from . import parser
-from . block import Block
-from typing import NamedTuple
-
-class Patch(NamedTuple):
-    """
-    Patch represents chunk of chat data
-    which is fetched by asyncdl.fetch_patch._fetch().
-    """
-    chats : list = []
-    continuation : str = None
-    seektime : float = None
-    first : int = None
-    last : int = None
-
-def fill(block:Block, patch:Patch):
-    if patch.last < block.end:
-        set_patch(block, patch)
-        return
-    block.continuation = None
-
-def set_patch(block:Block, patch:Patch):
-    block.continuation = patch.continuation
-    block.chat_data.extend(patch.chats)
-    block.last = patch.seektime
-    block.seektime = patch.seektime       
-
diff --git a/pytchat/tool/mining/superchat_miner.py b/pytchat/tool/mining/superchat_miner.py
deleted file mode 100644
index 8a5b3bd..0000000
--- a/pytchat/tool/mining/superchat_miner.py
+++ /dev/null
@@ -1,72 +0,0 @@
-from . import asyncdl
-from . import parser
-from .. videoinfo import VideoInfo
-from ... import config
-from ... exceptions import InvalidVideoIdException
-logger = config.logger(__name__)
-headers=config.headers
-
-class SuperChatMiner:
-    def __init__(self, video_id, duration, div, callback):
-        if not isinstance(div ,int) or div < 1:
-            raise ValueError('div must be positive integer.')
-        elif div > 10:
-            div = 10
-        if not isinstance(duration ,int) or duration < 1:
-            raise ValueError('duration must be positive integer.')
-        self.video_id = video_id
-        self.duration = duration
-        self.div = div
-        self.callback = callback
-        self.blocks = []
-
-    def _ready_blocks(self):
-        blocks = asyncdl.ready_blocks(
-            self.video_id, self.duration, self.div, self.callback)
-        self.blocks = [block for block in blocks if block is not None]
-        return self  
-
-    def _set_block_end(self):
-        for i in range(len(self.blocks)-1):
-            self.blocks[i].end = self.blocks[i+1].first
-        self.blocks[-1].end = self.duration
-        self.blocks[-1].is_last =True
-        return self
-
-    def _download_blocks(self):
-        asyncdl.fetch_patch(self.callback, self.blocks, self.video_id)
-        return self
-
-    def _combine(self):
-        ret = []
-        for block in self.blocks:
-            ret.extend(block.chat_data) 
-        return ret
-
-    def extract(self):
-        return (
-            self._ready_blocks()
-                ._set_block_end()
-                ._download_blocks()
-                ._combine()
-        )
-
-def extract(video_id, div = 1, callback = None, processor = None):
-    duration = 0
-    try:
-        duration = VideoInfo(video_id).get_duration()
-    except InvalidVideoIdException:
-        raise
-    if duration == 0:
-        print("video is live.")
-        return []
-    data = SuperChatMiner(video_id, duration, div, callback).extract()
-    if processor is None:
-        return data
-    return processor.process(
-        [{'video_id':None,'timeout':1,'chatdata' : (action
-        for action in data)}]
-    )
-
-def cancel():
-    asyncdl.cancel()
\ No newline at end of file
diff --git a/pytchat/tool/mining/worker.py b/pytchat/tool/mining/worker.py
deleted file mode 100644
index 3a53e40..0000000
--- a/pytchat/tool/mining/worker.py
+++ /dev/null
@@ -1,45 +0,0 @@
-from . import parser
-from . block import Block
-from . patch import Patch, fill
-from ... paramgen import arcparam
-INTERVAL = 1
-class ExtractWorker:
-    """
-    ExtractWorker associates a download session with a block.
-
-    When the worker finishes fetching, the block
-    being fetched is splitted and assigned the free worker.
-
-    Parameter
-    ----------
-    fetch : func :
-        extract function of asyncdl
-
-    block : Block :
-        Block object that includes chat_data
-    
-    blocks : list :
-        List of Block(s)
-
-    video_id : str :
-
-    parent_block : Block :
-        the block from which current block is splitted 
-    """
-    __slots__ = ['block', 'fetch', 'blocks', 'video_id', 'parent_block']
-    def __init__(self, fetch, block, blocks, video_id ):
-        self.block:Block = block
-        self.fetch = fetch
-        self.blocks:list = blocks
-        self.video_id:str = video_id
-        self.parent_block:Block = None
-
-    async def run(self, session):
-        while self.block.continuation:
-            patch = await self.fetch(
-                self.block.seektime, session)
-            fill(self.block, patch)
-            self.block.seektime += INTERVAL
-        self.block.done = True    
-
-