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Use singlequotes

kucoin_backend
jaredgoldman 2023-04-18 10:42:30 -04:00
parent 9fcfb8d780
commit fcdddadec1
1 changed files with 154 additions and 154 deletions
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308
piker/brokers/kucoin.py
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@ -13,10 +13,10 @@
# You should have received a copy of the GNU Affero General Public License # You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>. # along with this program. If not, see <https://www.gnu.org/licenses/>.
""" '''
Kucoin broker backend Kucoin broker backend
""" '''
from typing import Any, Callable, Literal, AsyncGenerator from typing import Any, Callable, Literal, AsyncGenerator
from contextlib import asynccontextmanager as acm from contextlib import asynccontextmanager as acm
@ -50,23 +50,23 @@ from ..data._web_bs import (
log = get_logger(__name__) log = get_logger(__name__)
_ohlc_dtype = [ _ohlc_dtype = [
("index", int), ('index', int),
("time", int), ('time', int),
("open", float), ('open', float),
("high", float), ('high', float),
("low", float), ('low', float),
("close", float), ('close', float),
("volume", float), ('volume', float),
("bar_wap", float), # will be zeroed by sampler if not filled ('bar_wap', float), # will be zeroed by sampler if not filled
] ]
class KucoinMktPair(Struct, frozen=True): class KucoinMktPair(Struct, frozen=True):
""" '''
Kucoin's pair format: Kucoin's pair format:
https://docs.kucoin.com/#get-symbols-list https://docs.kucoin.com/#get-symbols-list
""" '''
baseCurrency: str baseCurrency: str
baseIncrement: float baseIncrement: float
@ -88,11 +88,11 @@ class KucoinMktPair(Struct, frozen=True):
class AccountTrade(Struct, frozen=True): class AccountTrade(Struct, frozen=True):
""" '''
Historical trade format: Historical trade format:
https://docs.kucoin.com/#get-account-ledgers https://docs.kucoin.com/#get-account-ledgers
""" '''
id: str id: str
currency: str currency: str
@ -101,16 +101,16 @@ class AccountTrade(Struct, frozen=True):
balance: float balance: float
accountType: str accountType: str
bizType: str bizType: str
direction: Literal["in", "out"] direction: Literal['in', 'out']
createdAt: float createdAt: float
context: list[str] context: list[str]
class AccountResponse(Struct, frozen=True): class AccountResponse(Struct, frozen=True):
""" '''
https://docs.kucoin.com/#get-account-ledgers https://docs.kucoin.com/#get-account-ledgers
""" '''
currentPage: int currentPage: int
pageSize: int pageSize: int
@ -120,11 +120,11 @@ class AccountResponse(Struct, frozen=True):
class KucoinTrade(Struct, frozen=True): class KucoinTrade(Struct, frozen=True):
""" '''
Real-time trade format: Real-time trade format:
https://docs.kucoin.com/#symbol-ticker https://docs.kucoin.com/#symbol-ticker
""" '''
bestAsk: float bestAsk: float
bestAskSize: float bestAskSize: float
@ -137,11 +137,11 @@ class KucoinTrade(Struct, frozen=True):
class KucoinL2(Struct, frozen=True): class KucoinL2(Struct, frozen=True):
""" '''
Real-time L2 order book format: Real-time L2 order book format:
https://docs.kucoin.com/#level2-5-best-ask-bid-orders https://docs.kucoin.com/#level2-5-best-ask-bid-orders
""" '''
asks: list[list[float]] asks: list[list[float]]
bids: list[list[float]] bids: list[list[float]]
@ -149,10 +149,10 @@ class KucoinL2(Struct, frozen=True):
class KucoinMsg(Struct, frozen=True): class KucoinMsg(Struct, frozen=True):
""" '''
Generic outer-wrapper for any Kucoin ws msg Generic outer-wrapper for any Kucoin ws msg
""" '''
type: str type: str
topic: str topic: str
@ -169,10 +169,10 @@ class BrokerConfig(Struct, frozen=True):
def get_config() -> BrokerConfig | None: def get_config() -> BrokerConfig | None:
conf, _ = config.load() conf, _ = config.load()
section = conf.get("kucoin") section = conf.get('kucoin')
if section is None: if section is None:
log.warning("No config section found for kucoin in config") log.warning('No config section found for kucoin in config')
return None return None
return BrokerConfig(**section).copy() return BrokerConfig(**section).copy()
@ -186,94 +186,94 @@ class Client:
def _gen_auth_req_headers( def _gen_auth_req_headers(
self, self,
action: Literal["POST", "GET"], action: Literal['POST', 'GET'],
endpoint: str, endpoint: str,
api_v: str = "v2", api_v: str = 'v2',
) -> dict[str, str | bytes]: ) -> dict[str, str | bytes]:
""" '''
Generate authenticated request headers Generate authenticated request headers
https://docs.kucoin.com/#authentication https://docs.kucoin.com/#authentication
""" '''
str_to_sign = ( str_to_sign = (
str(int(time.time() * 1000)) + action + f"/api/{api_v}{endpoint}" str(int(time.time() * 1000)) + action + f'/api/{api_v}{endpoint}'
) )
signature = base64.b64encode( signature = base64.b64encode(
hmac.new( hmac.new(
self._config.key_secret.encode("utf-8"), self._config.key_secret.encode('utf-8'),
str_to_sign.encode("utf-8"), str_to_sign.encode('utf-8'),
hashlib.sha256, hashlib.sha256,
).digest() ).digest()
) )
passphrase = base64.b64encode( passphrase = base64.b64encode(
hmac.new( hmac.new(
self._config.key_secret.encode("utf-8"), self._config.key_secret.encode('utf-8'),
self._config.key_passphrase.encode("utf-8"), self._config.key_passphrase.encode('utf-8'),
hashlib.sha256, hashlib.sha256,
).digest() ).digest()
) )
return { return {
"KC-API-SIGN": signature, 'KC-API-SIGN': signature,
"KC-API-TIMESTAMP": str(pendulum.now().int_timestamp * 1000), 'KC-API-TIMESTAMP': str(pendulum.now().int_timestamp * 1000),
"KC-API-KEY": self._config.key_id, 'KC-API-KEY': self._config.key_id,
"KC-API-PASSPHRASE": passphrase, 'KC-API-PASSPHRASE': passphrase,
# XXX: Even if using the v1 api - this stays the same # XXX: Even if using the v1 api - this stays the same
"KC-API-KEY-VERSION": "2", 'KC-API-KEY-VERSION': '2',
} }
async def _request( async def _request(
self, self,
action: Literal["POST", "GET"], action: Literal['POST', 'GET'],
endpoint: str, endpoint: str,
api_v: str = "v2", api_v: str = 'v2',
headers: dict = {}, headers: dict = {},
) -> Any: ) -> Any:
""" '''
Generic request wrapper for Kucoin API Generic request wrapper for Kucoin API
""" '''
if self._config: if self._config:
headers = self._gen_auth_req_headers(action, endpoint, api_v) headers = self._gen_auth_req_headers(action, endpoint, api_v)
api_url = f"https://api.kucoin.com/api/{api_v}{endpoint}" api_url = f'https://api.kucoin.com/api/{api_v}{endpoint}'
res = await asks.request(action, api_url, headers=headers) res = await asks.request(action, api_url, headers=headers)
if "data" in res.json(): if 'data' in res.json():
return res.json()["data"] return res.json()['data']
else: else:
log.error( log.error(
f'Error making request to {api_url} -> {res.json()["msg"]}' f'Error making request to {api_url} -> {res.json()["msg"]}'
) )
return res.json()["msg"] return res.json()['msg']
async def _get_ws_token( async def _get_ws_token(
self, self,
private: bool = False, private: bool = False,
) -> tuple[str, int] | None: ) -> tuple[str, int] | None:
""" '''
Fetch ws token needed for sub access: Fetch ws token needed for sub access:
https://docs.kucoin.com/#apply-connect-token https://docs.kucoin.com/#apply-connect-token
returns a token and the interval we must ping returns a token and the interval we must ping
the server at to keep the connection alive the server at to keep the connection alive
""" '''
token_type = "private" if private else "public" token_type = 'private' if private else 'public'
try: try:
data: dict[str, Any] | None = await self._request( data: dict[str, Any] | None = await self._request(
"POST", f"/bullet-{token_type}", "v1" 'POST', f'/bullet-{token_type}', 'v1'
) )
except Exception as e: except Exception as e:
log.error(f"Error making request for Kucoin ws token -> {str(e)}") log.error(f'Error making request for Kucoin ws token -> {str(e)}')
return None return None
if data and "token" in data: if data and 'token' in data:
# ping_interval is in ms # ping_interval is in ms
ping_interval: int = data["instanceServers"][0]["pingInterval"] ping_interval: int = data['instanceServers'][0]['pingInterval']
return data["token"], ping_interval return data['token'], ping_interval
elif data: elif data:
log.error( log.error(
'Error making request for Kucoin ws token' 'Error making request for Kucoin ws token'
@ -283,22 +283,22 @@ class Client:
async def _get_pairs( async def _get_pairs(
self, self,
) -> dict[str, KucoinMktPair]: ) -> dict[str, KucoinMktPair]:
entries = await self._request("GET", "/symbols") entries = await self._request('GET', '/symbols')
syms = { syms = {
kucoin_sym_to_fqsn(item["name"]): KucoinMktPair(**item) kucoin_sym_to_fqsn(item['name']): KucoinMktPair(**item)
for item in entries for item in entries
} }
log.info(f" {len(syms)} Kucoin market pairs fetched") log.info(f' {len(syms)} Kucoin market pairs fetched')
return syms return syms
async def cache_pairs( async def cache_pairs(
self, self,
) -> dict[str, KucoinMktPair]: ) -> dict[str, KucoinMktPair]:
""" '''
Get cached pairs and convert keyed symbols into fqsns if ya want Get cached pairs and convert keyed symbols into fqsns if ya want
""" '''
if not self._pairs: if not self._pairs:
self._pairs = await self._get_pairs() self._pairs = await self._get_pairs()
@ -319,7 +319,7 @@ class Client:
async def last_trades(self, sym: str) -> list[AccountTrade]: async def last_trades(self, sym: str) -> list[AccountTrade]:
trades = await self._request( trades = await self._request(
"GET", f"/accounts/ledgers?currency={sym}", "v1" 'GET', f'/accounts/ledgers?currency={sym}', 'v1'
) )
trades = AccountResponse(**trades) trades = AccountResponse(**trades)
return trades.items return trades.items
@ -331,21 +331,21 @@ class Client:
end_dt: datetime | None = None, end_dt: datetime | None = None,
limit: int = 1000, limit: int = 1000,
as_np: bool = True, as_np: bool = True,
type: str = "1min", type: str = '1min',
) -> np.ndarray: ) -> np.ndarray:
""" '''
Get OHLC data and convert to numpy array for perffff: Get OHLC data and convert to numpy array for perffff:
https://docs.kucoin.com/#get-klines https://docs.kucoin.com/#get-klines
Kucoin bar data format: Kucoin bar data format:
[ [
"1545904980", //Start time of the candle cycle 0 '1545904980', //Start time of the candle cycle 0
"0.058", //opening price 1 '0.058', //opening price 1
"0.049", //closing price 2 '0.049', //closing price 2
"0.058", //highest price 3 '0.058', //highest price 3
"0.049", //lowest price 4 '0.049', //lowest price 4
"0.018", //Transaction volume 5 '0.018', //Transaction volume 5
"0.000945" //Transaction amount 6 '0.000945' //Transaction amount 6
], ],
piker ohlc numpy array format: piker ohlc numpy array format:
@ -360,14 +360,14 @@ class Client:
('bar_wap', float), # will be zeroed by sampler if not filled ('bar_wap', float), # will be zeroed by sampler if not filled
] ]
""" '''
# Generate generic end and start time if values not passed # Generate generic end and start time if values not passed
# Currently gives us 12hrs of data # Currently gives us 12hrs of data
if end_dt is None: if end_dt is None:
end_dt = pendulum.now("UTC").add(minutes=1) end_dt = pendulum.now('UTC').add(minutes=1)
if start_dt is None: if start_dt is None:
start_dt = end_dt.start_of("minute").subtract(minutes=limit) start_dt = end_dt.start_of('minute').subtract(minutes=limit)
start_dt = int(start_dt.timestamp()) start_dt = int(start_dt.timestamp())
end_dt = int(end_dt.timestamp()) end_dt = int(end_dt.timestamp())
@ -375,24 +375,24 @@ class Client:
kucoin_sym = fqsn_to_kucoin_sym(fqsn, self._pairs) kucoin_sym = fqsn_to_kucoin_sym(fqsn, self._pairs)
url = ( url = (
f"/market/candles?type={type}" f'/market/candles?type={type}'
f"&symbol={kucoin_sym}" f'&symbol={kucoin_sym}'
f"&startAt={start_dt}" f'&startAt={start_dt}'
f"&endAt={end_dt}" f'&endAt={end_dt}'
) )
for i in range(10): for i in range(10):
data = await self._request( data = await self._request(
"GET", 'GET',
url, url,
api_v="v1", api_v='v1',
) )
if not isinstance(data, list): if not isinstance(data, list):
# Do a gradual backoff if Kucoin is rate limiting us # Do a gradual backoff if Kucoin is rate limiting us
backoff_interval = i backoff_interval = i
log.warn( log.warn(
f"History call failed, backing off for {backoff_interval}s" f'History call failed, backing off for {backoff_interval}s'
) )
await trio.sleep(backoff_interval) await trio.sleep(backoff_interval)
else: else:
@ -431,11 +431,11 @@ class Client:
def fqsn_to_kucoin_sym(fqsn: str, pairs: dict[str, KucoinMktPair]) -> str: def fqsn_to_kucoin_sym(fqsn: str, pairs: dict[str, KucoinMktPair]) -> str:
pair_data = pairs[fqsn] pair_data = pairs[fqsn]
return pair_data.baseCurrency + "-" + pair_data.quoteCurrency return pair_data.baseCurrency + '-' + pair_data.quoteCurrency
def kucoin_sym_to_fqsn(sym: str) -> str: def kucoin_sym_to_fqsn(sym: str) -> str:
return sym.lower().replace("-", "") return sym.lower().replace('-', '')
@acm @acm
@ -450,7 +450,7 @@ async def get_client() -> AsyncGenerator[Client, None]:
async def open_symbol_search( async def open_symbol_search(
ctx: tractor.Context, ctx: tractor.Context,
) -> None: ) -> None:
async with open_cached_client("kucoin") as client: async with open_cached_client('kucoin') as client:
# load all symbols locally for fast search # load all symbols locally for fast search
await client.cache_pairs() await client.cache_pairs()
await ctx.started() await ctx.started()
@ -458,25 +458,25 @@ async def open_symbol_search(
async with ctx.open_stream() as stream: async with ctx.open_stream() as stream:
async for pattern in stream: async for pattern in stream:
await stream.send(await client.search_symbols(pattern)) await stream.send(await client.search_symbols(pattern))
log.info("Kucoin symbol search opened") log.info('Kucoin symbol search opened')
@acm @acm
async def open_ping_task(ws: wsproto.WSConnection, ping_interval, connect_id): async def open_ping_task(ws: wsproto.WSConnection, ping_interval, connect_id):
""" '''
Spawn a non-blocking task that pings the ws Spawn a non-blocking task that pings the ws
server every ping_interval so Kucoin doesn't drop server every ping_interval so Kucoin doesn't drop
our connection our connection
""" '''
async with trio.open_nursery() as n: async with trio.open_nursery() as n:
# TODO: cache this task so it's only called once # TODO: cache this task so it's only called once
async def ping_server(): async def ping_server():
while True: while True:
await trio.sleep((ping_interval - 1000) / 1000) await trio.sleep((ping_interval - 1000) / 1000)
await ws.send_msg({"id": connect_id, "type": "ping"}) await ws.send_msg({'id': connect_id, 'type': 'ping'})
log.info("Starting ping task for kucoin ws connection") log.info('Starting ping task for kucoin ws connection')
n.start_soon(ping_server) n.start_soon(ping_server)
yield yield
@ -488,22 +488,22 @@ async def stream_quotes(
send_chan: trio.abc.SendChannel, send_chan: trio.abc.SendChannel,
symbols: list[str], symbols: list[str],
feed_is_live: trio.Event, feed_is_live: trio.Event,
loglevel: str = "", loglevel: str = '',
# startup sync # startup sync
task_status: TaskStatus[tuple[dict, dict]] = trio.TASK_STATUS_IGNORED, task_status: TaskStatus[tuple[dict, dict]] = trio.TASK_STATUS_IGNORED,
) -> None: ) -> None:
""" '''
Required piker api to stream real-time data. Required piker api to stream real-time data.
Where the rubber hits the road baby Where the rubber hits the road baby
""" '''
async with open_cached_client("kucoin") as client: async with open_cached_client('kucoin') as client:
token, ping_interval = await client._get_ws_token() token, ping_interval = await client._get_ws_token()
connect_id = str(uuid4()) connect_id = str(uuid4())
pairs = await client.cache_pairs() pairs = await client.cache_pairs()
ws_url = ( ws_url = (
f"wss://ws-api-spot.kucoin.com/?" f'wss://ws-api-spot.kucoin.com/?'
f"token={token}&[connectId={connect_id}]" f'token={token}&[connectId={connect_id}]'
) )
# open ping task # open ping task
@ -511,7 +511,7 @@ async def stream_quotes(
open_autorecon_ws(ws_url) as ws, open_autorecon_ws(ws_url) as ws,
open_ping_task(ws, ping_interval, connect_id), open_ping_task(ws, ping_interval, connect_id),
): ):
log.info("Starting up quote stream") log.info('Starting up quote stream')
# loop through symbols and sub to feedz # loop through symbols and sub to feedz
for sym in symbols: for sym in symbols:
pair: KucoinMktPair = pairs[sym] pair: KucoinMktPair = pairs[sym]
@ -521,13 +521,13 @@ async def stream_quotes(
# pass back token, and bool, signalling if we're the writer # pass back token, and bool, signalling if we're the writer
# and that history has been written # and that history has been written
sym: { sym: {
"symbol_info": { 'symbol_info': {
"asset_type": "crypto", 'asset_type': 'crypto',
"price_tick_size": float(pair.baseIncrement), 'price_tick_size': float(pair.baseIncrement),
"lot_tick_size": float(pair.baseMinSize), 'lot_tick_size': float(pair.baseMinSize),
}, },
"shm_write_opts": {"sum_tick_vml": False}, 'shm_write_opts': {'sum_tick_vml': False},
"fqsn": sym, 'fqsn': sym,
} }
} }
@ -536,7 +536,7 @@ async def stream_quotes(
stream_messages(ws, sym) as msg_gen, stream_messages(ws, sym) as msg_gen,
): ):
typ, quote = await anext(msg_gen) typ, quote = await anext(msg_gen)
while typ != "trade": while typ != 'trade':
# take care to not unblock here until we get a real # take care to not unblock here until we get a real
# trade quote # trade quote
typ, quote = await anext(msg_gen) typ, quote = await anext(msg_gen)
@ -553,22 +553,22 @@ async def subscribe(ws: wsproto.WSConnection, connect_id, sym):
# level 2 sub # level 2 sub
await ws.send_msg( await ws.send_msg(
{ {
"id": connect_id, 'id': connect_id,
"type": "subscribe", 'type': 'subscribe',
"topic": f"/spotMarket/level2Depth5:{sym}", 'topic': f'/spotMarket/level2Depth5:{sym}',
"privateChannel": False, 'privateChannel': False,
"response": True, 'response': True,
} }
) )
# watch trades # watch trades
await ws.send_msg( await ws.send_msg(
{ {
"id": connect_id, 'id': connect_id,
"type": "subscribe", 'type': 'subscribe',
"topic": f"/market/ticker:{sym}", 'topic': f'/market/ticker:{sym}',
"privateChannel": False, 'privateChannel': False,
"response": True, 'response': True,
} }
) )
@ -576,14 +576,14 @@ async def subscribe(ws: wsproto.WSConnection, connect_id, sym):
# unsub # unsub
if ws.connected(): if ws.connected():
log.info(f"Unsubscribing to {sym} feed") log.info(f'Unsubscribing to {sym} feed')
await ws.send_msg( await ws.send_msg(
{ {
"id": connect_id, 'id': connect_id,
"type": "unsubscribe", 'type': 'unsubscribe',
"topic": f"/market/ticker:{sym}", 'topic': f'/market/ticker:{sym}',
"privateChannel": False, 'privateChannel': False,
"response": True, 'response': True,
} }
) )
@ -601,15 +601,15 @@ async def stream_messages(
if cs.cancelled_caught: if cs.cancelled_caught:
timeouts += 1 timeouts += 1
if timeouts > 2: if timeouts > 2:
log.error("kucoin feed is sh**ing the bed... rebooting...") log.error('kucoin feed is sh**ing the bed... rebooting...')
await ws._connect() await ws._connect()
continue continue
if msg.get("subject"): if msg.get('subject'):
msg = KucoinMsg(**msg) msg = KucoinMsg(**msg)
match msg.subject: match msg.subject:
case "trade.ticker": case 'trade.ticker':
trade_data = KucoinTrade(**msg.data) trade_data = KucoinTrade(**msg.data)
# XXX: Filter for duplicate messages as ws feed will # XXX: Filter for duplicate messages as ws feed will
@ -620,46 +620,46 @@ async def stream_messages(
last_trade_ts = trade_data.time last_trade_ts = trade_data.time
yield "trade", { yield 'trade', {
"symbol": sym, 'symbol': sym,
"last": trade_data.price, 'last': trade_data.price,
"brokerd_ts": last_trade_ts, 'brokerd_ts': last_trade_ts,
"ticks": [ 'ticks': [
{ {
"type": "trade", 'type': 'trade',
"price": float(trade_data.price), 'price': float(trade_data.price),
"size": float(trade_data.size), 'size': float(trade_data.size),
"broker_ts": last_trade_ts, 'broker_ts': last_trade_ts,
} }
], ],
} }
case "level2": case 'level2':
l2_data = KucoinL2(**msg.data) l2_data = KucoinL2(**msg.data)
first_ask = l2_data.asks[0] first_ask = l2_data.asks[0]
first_bid = l2_data.bids[0] first_bid = l2_data.bids[0]
yield "l1", { yield 'l1', {
"symbol": sym, 'symbol': sym,
"ticks": [ 'ticks': [
{ {
"type": "bid", 'type': 'bid',
"price": float(first_bid[0]), 'price': float(first_bid[0]),
"size": float(first_bid[1]), 'size': float(first_bid[1]),
}, },
{ {
"type": "bsize", 'type': 'bsize',
"price": float(first_bid[0]), 'price': float(first_bid[0]),
"size": float(first_bid[1]), 'size': float(first_bid[1]),
}, },
{ {
"type": "ask", 'type': 'ask',
"price": float(first_ask[0]), 'price': float(first_ask[0]),
"size": float(first_ask[1]), 'size': float(first_ask[1]),
}, },
{ {
"type": "asize", 'type': 'asize',
"price": float(first_ask[0]), 'price': float(first_ask[0]),
"size": float(first_ask[1]), 'size': float(first_ask[1]),
}, },
], ],
} }
@ -668,10 +668,10 @@ async def stream_messages(
@acm @acm
async def open_history_client( async def open_history_client(
symbol: str, symbol: str,
type: str = "1m", type: str = '1m',
) -> AsyncGenerator[Callable, None]: ) -> AsyncGenerator[Callable, None]:
async with open_cached_client("kucoin") as client: async with open_cached_client('kucoin') as client:
log.info("Attempting to open kucoin history client") log.info('Attempting to open kucoin history client')
async def get_ohlc_history( async def get_ohlc_history(
timeframe: float, timeframe: float,
@ -681,7 +681,7 @@ async def open_history_client(
np.ndarray, datetime | None, datetime | None np.ndarray, datetime | None, datetime | None
]: # start # end ]: # start # end
if timeframe != 60: if timeframe != 60:
raise DataUnavailable("Only 1m bars are supported") raise DataUnavailable('Only 1m bars are supported')
array = await client._get_bars( array = await client._get_bars(
symbol, symbol,
@ -689,14 +689,14 @@ async def open_history_client(
end_dt=end_dt, end_dt=end_dt,
) )
times = array["time"] times = array['time']
if end_dt is None: if end_dt is None:
inow = round(time.time()) inow = round(time.time())
print( print(
f"difference in time between load and processing" f'difference in time between load and processing'
f"{inow - times[-1]}" f'{inow - times[-1]}'
) )
if (inow - times[-1]) > 60: if (inow - times[-1]) > 60:
@ -705,7 +705,7 @@ async def open_history_client(
start_dt = pendulum.from_timestamp(times[0]) start_dt = pendulum.from_timestamp(times[0])
end_dt = pendulum.from_timestamp(times[-1]) end_dt = pendulum.from_timestamp(times[-1])
log.info("History succesfully fetched baby") log.info('History succesfully fetched baby')
return array, start_dt, end_dt return array, start_dt, end_dt