diff --git a/cryptofeed/exchanges/__init__.py b/cryptofeed/exchanges/__init__.py
index fbf837357..c8e7d2ca5 100644
--- a/cryptofeed/exchanges/__init__.py
+++ b/cryptofeed/exchanges/__init__.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
@@ -23,7 +23,6 @@
 from .bithumb import Bithumb
 from .bitmex import Bitmex
 from .bitstamp import Bitstamp
-from .bittrex import Bittrex
 from .blockchain import Blockchain
 from .bybit import Bybit
 from .coinbase import Coinbase
@@ -67,7 +66,6 @@
     BITHUMB: Bithumb,
     BITMEX: Bitmex,
     BITSTAMP: Bitstamp,
-    BITTREX: Bittrex,
     BLOCKCHAIN: Blockchain,
     BYBIT: Bybit,
     COINBASE: Coinbase,
diff --git a/cryptofeed/exchanges/ascendex.py b/cryptofeed/exchanges/ascendex.py
index 323199b6a..c7eb76dd0 100644
--- a/cryptofeed/exchanges/ascendex.py
+++ b/cryptofeed/exchanges/ascendex.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/bequant.py b/cryptofeed/exchanges/bequant.py
index 7483de3c5..d91d54543 100644
--- a/cryptofeed/exchanges/bequant.py
+++ b/cryptofeed/exchanges/bequant.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/binance.py b/cryptofeed/exchanges/binance.py
index d872da467..3c9e72898 100644
--- a/cryptofeed/exchanges/binance.py
+++ b/cryptofeed/exchanges/binance.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/binance_delivery.py b/cryptofeed/exchanges/binance_delivery.py
index 4f761c6da..e404b78b6 100644
--- a/cryptofeed/exchanges/binance_delivery.py
+++ b/cryptofeed/exchanges/binance_delivery.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/binance_futures.py b/cryptofeed/exchanges/binance_futures.py
index 580f5977c..f84df1e7e 100644
--- a/cryptofeed/exchanges/binance_futures.py
+++ b/cryptofeed/exchanges/binance_futures.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/binance_tr.py b/cryptofeed/exchanges/binance_tr.py
index 7428d4d49..58e4c7171 100644
--- a/cryptofeed/exchanges/binance_tr.py
+++ b/cryptofeed/exchanges/binance_tr.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/binance_us.py b/cryptofeed/exchanges/binance_us.py
index 324705f55..d20de8422 100644
--- a/cryptofeed/exchanges/binance_us.py
+++ b/cryptofeed/exchanges/binance_us.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/bitdotcom.py b/cryptofeed/exchanges/bitdotcom.py
index 3ceb5b162..31e93af86 100644
--- a/cryptofeed/exchanges/bitdotcom.py
+++ b/cryptofeed/exchanges/bitdotcom.py
@@ -32,7 +32,7 @@ class BitDotCom(Feed):
     ]
     rest_endpoints = [
         RestEndpoint('https://spot-api.bit.com', instrument_filter=('TYPE', (SPOT,)), sandbox='https://betaspot-api.bitexch.dev', routes=Routes('/spot/v1/instruments', authentication='/spot/v1/ws/auth')),
-        RestEndpoint('https://api.bit.com', instrument_filter=('TYPE', (OPTION, FUTURES, PERPETUAL)), sandbox='https://betaapi.bitexch.dev', routes=Routes('/v1/instruments?currency={}&active=true', currencies='/v1/currencies', authentication='/v1/ws/auth'))
+        RestEndpoint('https://api.bit.com', instrument_filter=('TYPE', (OPTION, FUTURES, PERPETUAL)), sandbox='https://betaapi.bitexch.dev', routes=Routes('/linear/v1/instruments?currency={}&active=true', currencies=True, authentication='/v1/ws/auth'))
     ]
 
     websocket_channels = {
@@ -53,8 +53,7 @@ def __init__(self, *args, **kwargs):
     @classmethod
     def _symbol_endpoint_prepare(cls, ep: RestEndpoint) -> Union[List[str], str]:
         if ep.routes.currencies:
-            ret = cls.http_sync.read(ep.route('currencies'), json=True, uuid=cls.id)
-            return [ep.route('instruments').format(currency) for currency in ret['data']['currencies']]
+            return [ep.route('instruments').format(currency) for currency in ('USD', 'USDT')]
         return ep.route('instruments')
 
     @classmethod
diff --git a/cryptofeed/exchanges/bitfinex.py b/cryptofeed/exchanges/bitfinex.py
index 8aaeb90bc..4d6a94a12 100644
--- a/cryptofeed/exchanges/bitfinex.py
+++ b/cryptofeed/exchanges/bitfinex.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/bitflyer.py b/cryptofeed/exchanges/bitflyer.py
index 26afe3233..aa64f5c89 100644
--- a/cryptofeed/exchanges/bitflyer.py
+++ b/cryptofeed/exchanges/bitflyer.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2018-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2018-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/bitget.py b/cryptofeed/exchanges/bitget.py
index 9b9fe088f..73d640455 100644
--- a/cryptofeed/exchanges/bitget.py
+++ b/cryptofeed/exchanges/bitget.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/bithumb.py b/cryptofeed/exchanges/bithumb.py
index 635f3e213..54ed34351 100644
--- a/cryptofeed/exchanges/bithumb.py
+++ b/cryptofeed/exchanges/bithumb.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/bitmex.py b/cryptofeed/exchanges/bitmex.py
index 6e9175f6c..d8edc25f8 100644
--- a/cryptofeed/exchanges/bitmex.py
+++ b/cryptofeed/exchanges/bitmex.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/bitstamp.py b/cryptofeed/exchanges/bitstamp.py
index 4f8255721..8e683cf91 100644
--- a/cryptofeed/exchanges/bitstamp.py
+++ b/cryptofeed/exchanges/bitstamp.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/bittrex.py b/cryptofeed/exchanges/bittrex.py
deleted file mode 100644
index 23eae0458..000000000
--- a/cryptofeed/exchanges/bittrex.py
+++ /dev/null
@@ -1,413 +0,0 @@
-import asyncio
-import base64
-import hashlib
-import hmac
-import logging
-import time
-from typing import Dict, Tuple
-import uuid
-import zlib
-from decimal import Decimal
-
-import requests
-from yapic import json
-
-from cryptofeed.connection import AsyncConnection, RestEndpoint, Routes, WebsocketEndpoint
-from cryptofeed.defines import BALANCES, BID, ASK, BITTREX, BUY, CANDLES, L2_BOOK, SELL, TICKER, TRADES, ORDER_INFO, CLOSED, OPEN, SUBMITTING, MARKET, LIMIT
-from cryptofeed.feed import Feed
-from cryptofeed.symbols import Symbol
-from cryptofeed.exceptions import MissingSequenceNumber
-from cryptofeed.types import OrderBook, Trade, Ticker, Candle, OrderInfo, Balance
-
-
-LOG = logging.getLogger('feedhandler')
-
-
-class Bittrex(Feed):
-    id = BITTREX
-    websocket_endpoints = [WebsocketEndpoint('wss://www.bitmex.com/realtime', authentication=True)]
-    rest_endpoints = [RestEndpoint('https://api.bittrex.com', routes=Routes('/v3/markets', l2book='/v3/markets/{}/orderbook?depth={}'))]
-
-    valid_candle_intervals = {'1m', '5m', '1h', '1d'}
-    valid_depths = [1, 25, 500]
-    websocket_channels = {
-        L2_BOOK: 'orderbook_{}_{}',
-        TRADES: 'trade_{}',
-        TICKER: 'ticker_{}',
-        CANDLES: 'candle_{}_{}',
-        ORDER_INFO: 'order',
-        BALANCES: 'balance'
-    }
-
-    @classmethod
-    def _parse_symbol_data(cls, data: dict) -> Tuple[Dict, Dict]:
-        info = {'instrument_type': {}}
-        ret = {}
-        for e in data:
-            if e['status'] != 'ONLINE':
-                continue
-            s = Symbol(e['baseCurrencySymbol'], e['quoteCurrencySymbol'])
-            ret[s.normalized] = e['symbol']
-            info['instrument_type'][s.normalized] = s.type
-        return ret, info
-
-    async def _ws_authentication(self, address: str, options: dict) -> Tuple[str, dict]:
-        # Technically this isnt authentication, its the negotiation step for SignalR that
-        # we are performing here since this method is called right before connecting
-        r = self.http_sync.read('https://socket-v3.bittrex.com/signalr/negotiate', params={'connectionData': json.dumps([{'name': 'c3'}]), 'clientProtocol': 1.5}, json=True)
-        token = r['ConnectionToken']
-        url = requests.Request('GET', 'https://socket-v3.bittrex.com/signalr/connect', params={'transport': 'webSockets', 'connectionToken': token, 'connectionData': json.dumps([{"name": "c3"}]), 'clientProtocol': 1.5}).prepare().url
-        return url.replace('https://', 'wss://'), options
-
-    def __reset(self):
-        self._l2_book = {}
-        self.seq_no = {}
-
-    def __depth(self):
-        depth = self.valid_depths[-1]
-        if self.max_depth:
-            if 25 <= self.max_depth >= 500:
-                depth = 500
-            else:
-                depth = 25
-        return depth
-
-    async def ticker(self, msg: dict, timestamp: float):
-        """
-        {
-            'symbol': 'BTC-USDT',
-            'lastTradeRate': '38904.35254113',
-            'bidRate': '38868.52330647',
-            'askRate': '38886.38815323'
-        }
-        """
-        t = Ticker(
-            self.id,
-            self.exchange_symbol_to_std_symbol(msg['symbol']),
-            Decimal(msg['bidRate']),
-            Decimal(msg['askRate']),
-            None,
-            raw=msg
-        )
-        await self.callback(TICKER, t, timestamp)
-
-    async def book(self, msg: dict, timestamp: float):
-        """
-        {
-            'marketSymbol': 'BTC-USDT',
-            'depth': 500,
-            'sequence': 6032818,
-            'bidDeltas': [
-                {
-                    'quantity': '0',
-                    'rate': '38926.13088302'
-                },
-                {
-                    'quantity': '0.00213516',
-                    'rate': '31881.73000000'
-                }
-            ],
-            'askDeltas': [
-                {
-                    'quantity': '0.03106831',
-                    'rate': '38989.50808432'
-                },
-                {
-                    'quantity': '0.27954874',
-                    'rate': '39013.57939993'
-                },
-                {
-                    'quantity': '0',
-                    'rate': '46667.67569819'
-                }
-            ]
-        }
-        """
-        pair = self.exchange_symbol_to_std_symbol(msg['marketSymbol'])
-        seq_no = int(msg['sequence'])
-        delta = {BID: [], ASK: []}
-
-        if pair not in self._l2_book:
-            await self._snapshot(pair, seq_no)
-        else:
-            if seq_no <= self.seq_no[pair]:
-                return
-            if seq_no != self.seq_no[pair] + 1:
-                raise MissingSequenceNumber
-
-            self.seq_no[pair] = seq_no
-            for side, key in ((BID, 'bidDeltas'), (ASK, 'askDeltas')):
-                for update in msg[key]:
-                    price = Decimal(update['rate'])
-                    size = Decimal(update['quantity'])
-                    if size == 0:
-                        delta[side].append((price, 0))
-                        if price in self._l2_book[pair].book[side]:
-                            del self._l2_book[pair].book[side][price]
-                    else:
-                        self._l2_book[pair].book[side][price] = size
-                        delta[side].append((price, size))
-
-        await self.book_callback(L2_BOOK, self._l2_book[pair], timestamp, raw=msg, sequence_number=seq_no, delta=delta)
-
-    async def _snapshot(self, symbol: str, sequence_number: int):
-        while True:
-            ret, headers = await self.http_conn.read(self.rest_endpoints[0].route('l2book', self.sandbox).format(symbol, self.__depth()), return_headers=True)
-            seq = int(headers['Sequence'])
-            if seq >= sequence_number:
-                break
-            await asyncio.sleep(1.0)
-
-        self.seq_no[symbol] = seq
-        data = json.loads(ret, parse_float=Decimal)
-        self._l2_book[symbol] = OrderBook(self.id, symbol, max_depth=self.max_depth)
-        for side, entries in data.items():
-            self._l2_book[symbol].book[side] = {Decimal(e['rate']): Decimal(e['quantity']) for e in entries}
-        await self.book_callback(L2_BOOK, self._l2_book[symbol], time.time(), raw=data, sequence_number=seq)
-
-    async def trades(self, msg: dict, timestamp: float):
-        """
-        {
-            'deltas': [
-                {
-                    'id': '8e7f693b-6504-4cb7-9484-835435b147f9',
-                    'executedAt': datetime.datetime(2021, 6, 13, 22, 38, 11, 80000, tzinfo=datetime.timezone.utc),
-                    'quantity': '0.00693216',
-                    'rate': '38808.83000000',
-                    'takerSide': 'BUY'
-                }
-            ],
-            'sequence': 204392,
-            'marketSymbol': 'BTC-USD'
-        }
-        """
-        pair = self.exchange_symbol_to_std_symbol(msg['marketSymbol'])
-        for trade in msg['deltas']:
-            t = Trade(
-                self.id,
-                pair,
-                BUY if trade['takerSide'] == 'BUY' else SELL,
-                Decimal(trade['quantity']),
-                Decimal(trade['rate']),
-                self.timestamp_normalize(trade['executedAt']),
-                id=trade['id'],
-                raw=trade
-            )
-            await self.callback(TRADES, t, timestamp)
-
-    async def candle(self, msg: dict, timestamp: float):
-        """
-        {
-            'sequence': 134514,
-            'marketSymbol': 'BTC-USDT',
-            'interval': 'MINUTE_1',
-            'delta': {
-                'startsAt': datetime.datetime(2021, 6, 14, 1, 12, tzinfo=datetime.timezone.utc),
-                'open': '39023.31434847',
-                'high': '39023.31434847',
-                'low': '39023.31434847',
-                'close': '39023.31434847',
-                'volume': '0.05944473',
-                'quoteVolume': '2319.73038514'
-            },
-            'candleType': 'TRADE'
-        }
-        """
-        start = self.timestamp_normalize(msg['delta']['startsAt'])
-        offset = 0
-        if self.candle_interval == '1m':
-            offset = 60
-        elif self.candle_interval == '5m':
-            offset = 300
-        elif self.candle_interval == '1h':
-            offset = 3600
-        elif self.candle_interval == '1d':
-            offset = 86400
-        end = start + offset
-
-        c = Candle(
-            self.id,
-            self.exchange_symbol_to_std_symbol(msg['marketSymbol']),
-            start,
-            end,
-            self.candle_interval,
-            None,
-            Decimal(msg['delta']['open']),
-            Decimal(msg['delta']['close']),
-            Decimal(msg['delta']['high']),
-            Decimal(msg['delta']['low']),
-            Decimal(msg['delta']['volume']),
-            None,
-            None,
-            raw=msg
-        )
-        await self.callback(CANDLES, c, timestamp)
-
-    async def order(self, msg: dict, timestamp: float):
-        """
-        example message:
-        {
-            "accountId": "17f2b2e3-ff86-4357-a76b-34124ee30274",
-            "sequence": 22606,
-            "delta": {
-                "id": "01fa3794-10cf-4897-bc47-c96f15135f34",
-                "marketSymbol": "VLX-USDT",
-                "direction": "SELL",
-                "type": "LIMIT",
-                "quantity": "50.00000000",
-                "limit": "0.049000000000",
-                "timeInForce": "GOOD_TIL_CANCELLED",
-                "fillQuantity": "0.00000000",
-                "commission": "0.00000000",
-                "proceeds": "0.00000000",
-                "status": "OPEN",
-                "createdAt": "2022-08-05T15:04:16.02Z",
-                "updatedAt": "2022-08-05T15:04:16.02Z"
-            }
-        }
-        """
-        order = msg['delta']
-        status = order['status']
-        if status == 'new':
-            status = SUBMITTING
-            # There was no observation made, that there are more than "OPEN" and "CLOSED". Needs Support clarification with BITTREX.
-        elif status == 'OPEN':
-            status = OPEN
-        elif status == 'CLOSED':
-            status = CLOSED
-
-        remainingSize = Decimal(order['quantity']) - Decimal(order['fillQuantity'])
-
-        oi = OrderInfo(
-            self.id,
-            self.exchange_symbol_to_std_symbol(order['marketSymbol']),
-            str(order['id']),
-            BUY if order['direction'].lower() == 'buy' else SELL,
-            status,
-            LIMIT if order['type'].lower() == 'limit' else MARKET,
-            Decimal(order['limit']) if 'limit' in order else None,
-            Decimal(order['fillQuantity']),  # the filled Size
-            remainingSize,  # the remaining Size
-            timestamp=str(order['createdAt']),
-            client_order_id=order['clientOrderId'] if 'clientOrderId' in order else None,
-            # account=self.subaccount,
-            raw=msg
-        )
-        await self.callback(ORDER_INFO, oi, timestamp)
-
-    async def balance(self, msg: dict, timestamp: float):
-        """
-            {
-                "accountId": "17f42de3-ff86-4357-a76b-34124ee30c63",
-                "sequence": 33119,
-                "delta": {
-                    "currencySymbol": "VLX",
-                    "total": "636.02206857",
-                    "available": "0.00000000",
-                    "updatedAt": "2022-08-05T13:46:31.73Z"
-                }
-            }
-        """
-        delta = msg["delta"]
-        available = Decimal(delta["available"])
-        locked = Decimal(delta["total"]) - available
-        bal = Balance(
-            self.id,
-            delta['currencySymbol'],
-            available,
-            locked,
-            raw=msg
-        )
-        await self.callback(BALANCES, bal, timestamp)
-
-    async def message_handler(self, msg: str, conn, timestamp: float):
-        msg = json.loads(msg)
-        if 'R' in msg and ('Success') in msg['R']:
-            LOG.info(f"Authenticated for private subscriptions: {msg['R']['Success']}")
-        elif 'M' in msg and len(msg['M']) > 0:
-            for update in msg['M']:
-                if update['M'] == 'orderBook':
-                    for message in update['A']:
-                        data = json.loads(zlib.decompress(base64.b64decode(message), -zlib.MAX_WBITS).decode(), parse_float=Decimal)
-                        await self.book(data, timestamp)
-                elif update['M'] == 'trade':
-                    for message in update['A']:
-                        data = json.loads(zlib.decompress(base64.b64decode(message), -zlib.MAX_WBITS).decode(), parse_float=Decimal)
-                        await self.trades(data, timestamp)
-                elif update['M'] == 'ticker':
-                    for message in update['A']:
-                        data = json.loads(zlib.decompress(base64.b64decode(message), -zlib.MAX_WBITS).decode(), parse_float=Decimal)
-                        await self.ticker(data, timestamp)
-                elif update['M'] == 'candle':
-                    for message in update['A']:
-                        data = json.loads(zlib.decompress(base64.b64decode(message), -zlib.MAX_WBITS).decode(), parse_float=Decimal)
-                        await self.candle(data, timestamp)
-                elif update['M'] == 'order':
-                    for message in update['A']:
-                        data = json.loads(zlib.decompress(base64.b64decode(message), -zlib.MAX_WBITS).decode(), parse_float=Decimal)
-                        await self.order(data, timestamp)
-                elif update['M'] == 'balance':
-                    for message in update['A']:
-                        data = json.loads(zlib.decompress(base64.b64decode(message), -zlib.MAX_WBITS).decode(), parse_float=Decimal)
-                        await self.balance(data, timestamp)
-                elif update['M'] == 'authenticationExpiring':
-                    # WARNING : BITTREX: Invalid message type {'C': 'd-942EDED9-B,0|Bjh,1|Bji,3|Bjj,0|Bjk,0', 'M': [{'H': 'C3', 'M': 'authenticationExpiring', 'A': []}]}
-                    LOG.debug("%s: private subscription authentication expired. %s", self.id, msg)
-                else:
-                    LOG.warning("%s: Invalid message type %s", self.id, msg)
-        elif 'E' in msg:
-            LOG.error("%s: Error from exchange %s", self.id, msg)
-
-    async def generate_token(self, conn: AsyncConnection):
-        timestamp = str(int(time.time()) * 1000)
-        random_content = str(uuid.uuid4())
-        content = timestamp + random_content
-        signed_content = hmac.new(self.key_secret.encode(), content.encode(), hashlib.sha512).hexdigest()
-
-        msg = {'A': [self.key_id, timestamp, random_content, signed_content], 'H': 'c3', 'I': 0, 'M': 'Authenticate'}
-        # There is only subacounts on BITTREX for institutional customers.
-        # if self.subaccount:
-        #     msg['args']['subaccount'] = self.subaccount
-        await conn.write(json.dumps(msg))
-
-    async def authenticate(self, conn: AsyncConnection):
-        if self.requires_authentication:
-            await self.generate_token(conn)
-
-    async def subscribe(self, conn: AsyncConnection):
-        self.__reset()
-        # H: Hub, M: Message, A: Args, I: Internal ID
-        # For more signalR info see:
-        # https://blog.3d-logic.com/2015/03/29/signalr-on-the-wire-an-informal-description-of-the-signalr-protocol/
-        # http://blogs.microsoft.co.il/applisec/2014/03/12/signalr-message-format/
-        for chan in self.subscription:
-            channel = self.exchange_channel_to_std(chan)
-            i = 1
-            # If we subscribe to ORDER_INFO, then that is registered for all symbols in our account.
-            # if channel in (ORDER_INFO, BALANCES):
-            if self.is_authenticated_channel(self.exchange_channel_to_std(chan)):
-                msg = {'A': ([chan],), 'H': 'c3', 'I': i, 'M': 'Subscribe'}
-                await conn.write(json.dumps(msg))
-                i += 1
-            else:
-                for symbol in self.subscription[chan]:
-                    if channel == L2_BOOK:
-                        msg = {'A': ([chan.format(symbol, self.__depth())],), 'H': 'c3', 'I': i, 'M': 'Subscribe'}
-                    elif channel in (TRADES, TICKER):
-                        msg = {'A': ([chan.format(symbol)],), 'H': 'c3', 'I': i, 'M': 'Subscribe'}
-                        LOG.info(f"loop subscribed: {([chan.format(symbol)],)}")
-                    elif channel == CANDLES:
-                        interval = None
-                        if self.candle_interval == '1m':
-                            interval = 'MINUTE_1'
-                        elif self.candle_interval == '5m':
-                            interval = 'MINUTE_5'
-                        elif self.candle_interval == '1h':
-                            interval = 'HOUR_1'
-                        elif self.candle_interval == '1d':
-                            interval = 'DAY_1'
-                        msg = {'A': ([chan.format(symbol, interval)],), 'H': 'c3', 'I': i, 'M': 'Subscribe'}
-                    else:
-                        LOG.error("%s: invalid subscription for channel %s", channel)
-                    await conn.write(json.dumps(msg))
-                    i += 1
diff --git a/cryptofeed/exchanges/blockchain.py b/cryptofeed/exchanges/blockchain.py
index bbc51db57..568b416b7 100644
--- a/cryptofeed/exchanges/blockchain.py
+++ b/cryptofeed/exchanges/blockchain.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/bybit.py b/cryptofeed/exchanges/bybit.py
index c01d4eb91..b52e4ac72 100644
--- a/cryptofeed/exchanges/bybit.py
+++ b/cryptofeed/exchanges/bybit.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2018-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2018-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/coinbase.py b/cryptofeed/exchanges/coinbase.py
index 8e8bda9d4..f3ccf89fa 100644
--- a/cryptofeed/exchanges/coinbase.py
+++ b/cryptofeed/exchanges/coinbase.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/cryptodotcom.py b/cryptofeed/exchanges/cryptodotcom.py
index 359d2c4ce..e9f8d3ed4 100644
--- a/cryptofeed/exchanges/cryptodotcom.py
+++ b/cryptofeed/exchanges/cryptodotcom.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/delta.py b/cryptofeed/exchanges/delta.py
index 35a7cd6ac..5f0e61c7b 100644
--- a/cryptofeed/exchanges/delta.py
+++ b/cryptofeed/exchanges/delta.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
@@ -56,7 +56,7 @@ def _parse_symbol_data(cls, data: dict) -> Tuple[Dict, Dict]:
             elif entry['contract_type'] == 'call_options' or entry['contract_type'] == 'put_options':
                 otype = PUT if entry['contract_type'].startswith('put') else CALL
                 sym = Symbol(base, quote, type=OPTION, strike_price=entry['strike_price'], expiry_date=entry['settlement_time'], option_type=otype)
-            elif entry['contract_type'] in {'interest_rate_swaps', 'spreads'}:
+            elif entry['contract_type'] in {'interest_rate_swaps', 'spreads', 'options_combos'}:
                 continue
             else:
                 raise ValueError(entry['contract_type'])
diff --git a/cryptofeed/exchanges/dydx.py b/cryptofeed/exchanges/dydx.py
index a74e7e558..0cf731066 100644
--- a/cryptofeed/exchanges/dydx.py
+++ b/cryptofeed/exchanges/dydx.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/fmfw.py b/cryptofeed/exchanges/fmfw.py
index b0e6f7419..1d7271d57 100644
--- a/cryptofeed/exchanges/fmfw.py
+++ b/cryptofeed/exchanges/fmfw.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/gateio.py b/cryptofeed/exchanges/gateio.py
index 4e6add8d9..1d0bb2803 100644
--- a/cryptofeed/exchanges/gateio.py
+++ b/cryptofeed/exchanges/gateio.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/gateio_futures.py b/cryptofeed/exchanges/gateio_futures.py
index 73761882f..c20d0c547 100644
--- a/cryptofeed/exchanges/gateio_futures.py
+++ b/cryptofeed/exchanges/gateio_futures.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/gemini.py b/cryptofeed/exchanges/gemini.py
index a94a81a11..f1b89ece5 100644
--- a/cryptofeed/exchanges/gemini.py
+++ b/cryptofeed/exchanges/gemini.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/hitbtc.py b/cryptofeed/exchanges/hitbtc.py
index d62362998..5041932bf 100644
--- a/cryptofeed/exchanges/hitbtc.py
+++ b/cryptofeed/exchanges/hitbtc.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/huobi.py b/cryptofeed/exchanges/huobi.py
index f0641d322..d2f634f3d 100644
--- a/cryptofeed/exchanges/huobi.py
+++ b/cryptofeed/exchanges/huobi.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/huobi_dm.py b/cryptofeed/exchanges/huobi_dm.py
index c65750d1e..706469aa3 100644
--- a/cryptofeed/exchanges/huobi_dm.py
+++ b/cryptofeed/exchanges/huobi_dm.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/huobi_swap.py b/cryptofeed/exchanges/huobi_swap.py
index f9b0fbff2..0b7ff4cca 100644
--- a/cryptofeed/exchanges/huobi_swap.py
+++ b/cryptofeed/exchanges/huobi_swap.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/independent_reserve.py b/cryptofeed/exchanges/independent_reserve.py
index f1487345f..a3ad1e7a7 100644
--- a/cryptofeed/exchanges/independent_reserve.py
+++ b/cryptofeed/exchanges/independent_reserve.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/kraken.py b/cryptofeed/exchanges/kraken.py
index 9d52c8fb6..2861ef4e0 100644
--- a/cryptofeed/exchanges/kraken.py
+++ b/cryptofeed/exchanges/kraken.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/kraken_futures.py b/cryptofeed/exchanges/kraken_futures.py
index ae41f11be..4c1677a72 100644
--- a/cryptofeed/exchanges/kraken_futures.py
+++ b/cryptofeed/exchanges/kraken_futures.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/kucoin.py b/cryptofeed/exchanges/kucoin.py
index 1ed689fd8..9b390be3d 100644
--- a/cryptofeed/exchanges/kucoin.py
+++ b/cryptofeed/exchanges/kucoin.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/mixins/binance_rest.py b/cryptofeed/exchanges/mixins/binance_rest.py
index 06aac8637..49b627288 100644
--- a/cryptofeed/exchanges/mixins/binance_rest.py
+++ b/cryptofeed/exchanges/mixins/binance_rest.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/mixins/bitfinex_rest.py b/cryptofeed/exchanges/mixins/bitfinex_rest.py
index 670d78ac5..a5fc2d9e2 100644
--- a/cryptofeed/exchanges/mixins/bitfinex_rest.py
+++ b/cryptofeed/exchanges/mixins/bitfinex_rest.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/mixins/bitmex_rest.py b/cryptofeed/exchanges/mixins/bitmex_rest.py
index 47b0aa188..d7430062c 100644
--- a/cryptofeed/exchanges/mixins/bitmex_rest.py
+++ b/cryptofeed/exchanges/mixins/bitmex_rest.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/mixins/bitstamp_rest.py b/cryptofeed/exchanges/mixins/bitstamp_rest.py
index d363d53f6..ff9e71773 100644
--- a/cryptofeed/exchanges/mixins/bitstamp_rest.py
+++ b/cryptofeed/exchanges/mixins/bitstamp_rest.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/mixins/coinbase_rest.py b/cryptofeed/exchanges/mixins/coinbase_rest.py
index 9df2f3bf8..bcaf32388 100644
--- a/cryptofeed/exchanges/mixins/coinbase_rest.py
+++ b/cryptofeed/exchanges/mixins/coinbase_rest.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/mixins/deribit_rest.py b/cryptofeed/exchanges/mixins/deribit_rest.py
index 4980b2fde..8657b654d 100644
--- a/cryptofeed/exchanges/mixins/deribit_rest.py
+++ b/cryptofeed/exchanges/mixins/deribit_rest.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/mixins/dydx_rest.py b/cryptofeed/exchanges/mixins/dydx_rest.py
index 2c308ed15..5f006c336 100644
--- a/cryptofeed/exchanges/mixins/dydx_rest.py
+++ b/cryptofeed/exchanges/mixins/dydx_rest.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/mixins/gemini_rest.py b/cryptofeed/exchanges/mixins/gemini_rest.py
index d3ab07a4c..c088d142e 100644
--- a/cryptofeed/exchanges/mixins/gemini_rest.py
+++ b/cryptofeed/exchanges/mixins/gemini_rest.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/mixins/kraken_rest.py b/cryptofeed/exchanges/mixins/kraken_rest.py
index b4a3a35f8..f8fe10026 100644
--- a/cryptofeed/exchanges/mixins/kraken_rest.py
+++ b/cryptofeed/exchanges/mixins/kraken_rest.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/mixins/okx_rest.py b/cryptofeed/exchanges/mixins/okx_rest.py
index dabdf8101..9641c9526 100644
--- a/cryptofeed/exchanges/mixins/okx_rest.py
+++ b/cryptofeed/exchanges/mixins/okx_rest.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/mixins/upbit_rest.py b/cryptofeed/exchanges/mixins/upbit_rest.py
index cc0383a86..6a63bb286 100644
--- a/cryptofeed/exchanges/mixins/upbit_rest.py
+++ b/cryptofeed/exchanges/mixins/upbit_rest.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/okcoin.py b/cryptofeed/exchanges/okcoin.py
index c49a6944f..c3a7fbf4e 100644
--- a/cryptofeed/exchanges/okcoin.py
+++ b/cryptofeed/exchanges/okcoin.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/okx.py b/cryptofeed/exchanges/okx.py
index 38cdbab63..e8dda514d 100644
--- a/cryptofeed/exchanges/okx.py
+++ b/cryptofeed/exchanges/okx.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/phemex.py b/cryptofeed/exchanges/phemex.py
index 6b7269631..e67325b60 100644
--- a/cryptofeed/exchanges/phemex.py
+++ b/cryptofeed/exchanges/phemex.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/poloniex.py b/cryptofeed/exchanges/poloniex.py
index ac1944309..49b0427d9 100644
--- a/cryptofeed/exchanges/poloniex.py
+++ b/cryptofeed/exchanges/poloniex.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/probit.py b/cryptofeed/exchanges/probit.py
index b139fdccb..ec70da689 100644
--- a/cryptofeed/exchanges/probit.py
+++ b/cryptofeed/exchanges/probit.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.
diff --git a/cryptofeed/exchanges/upbit.py b/cryptofeed/exchanges/upbit.py
index 246a5fb8c..040249240 100644
--- a/cryptofeed/exchanges/upbit.py
+++ b/cryptofeed/exchanges/upbit.py
@@ -1,5 +1,5 @@
 '''
-Copyright (C) 2017-2023 Bryant Moscon - bmoscon@gmail.com
+Copyright (C) 2017-2024 Bryant Moscon - bmoscon@gmail.com
 
 Please see the LICENSE file for the terms and conditions
 associated with this software.