From f970b7c5633cced5c776865f79e74ba239bb4d8d Mon Sep 17 00:00:00 2001 From: Guillermo Rodriguez Date: Wed, 1 Jun 2022 10:22:02 -0300 Subject: [PATCH] Initial deribit mock up --- piker/brokers/deribit.py | 407 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 407 insertions(+) create mode 100644 piker/brokers/deribit.py diff --git a/piker/brokers/deribit.py b/piker/brokers/deribit.py new file mode 100644 index 00000000..cbd48369 --- /dev/null +++ b/piker/brokers/deribit.py @@ -0,0 +1,407 @@ +# piker: trading gear for hackers +# Copyright (C) Guillermo Rodriguez (in stewardship for piker0) + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. + +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see . + +""" +Deribit backend + +""" +from contextlib import asynccontextmanager as acm +from datetime import datetime +from typing import ( + Any, Union, Optional, + AsyncGenerator, Callable, +) +import time + +import trio +from trio_typing import TaskStatus +import pendulum +import asks +from fuzzywuzzy import process as fuzzy +import numpy as np +import tractor +from pydantic.dataclasses import dataclass +from pydantic import BaseModel +import wsproto + +from .._cacheables import open_cached_client +from ._util import resproc, SymbolNotFound +from ..log import get_logger, get_console_log +from ..data import ShmArray +from ..data._web_bs import open_autorecon_ws, NoBsWs + + +from cryptofeed import FeedHandler + +from cryptofeed.callback import ( + L1BookCallback, + TradeCallback +) +from cryptofeed.defines import DERIBIT, L1_BOOK, TRADES + + +log = get_logger(__name__) + + +_url = 'https://www.deribit.com' + + +# Broker specific ohlc schema (rest) +_ohlc_dtype = [ + ('index', int), + ('time', int), + ('open', float), + ('high', float), + ('low', float), + ('close', float), + ('volume', float), + ('bar_wap', float), # will be zeroed by sampler if not filled +] + +class KLinesResult(BaseModel): + close: List[float] + cost: List[float] + high: List[float] + low: List[float] + open: List[float] + status: str + ticks: List[int] + volume: List[float] + +class KLines(BaseModel): + id: int + jsonrpc: str = '2.0' + result: KLinesResult + + +# convert datetime obj timestamp to unixtime in milliseconds +def deribit_timestamp(when): + return int((when.timestamp() * 1000) + (when.microsecond / 1000)) + + +class Client: + + def __init__(self) -> None: + self._sesh = asks.Session(connections=4) + self._sesh.base_location = _url + self._pairs: dict[str, Any] = {} + + async def _api( + self, + method: str, + params: dict, + ) -> dict[str, Any]: + resp = await self._sesh.get( + path=f'/api/v2/public/{method}', + params=params, + timeout=float('inf') + ) + return resproc(resp, log) + + async def symbol_info( + self, + instrument: Optional[str] = None, + currency: str = 'btc', # BTC, ETH, SOL, USDC + kind: str = 'option', + expired: bool = False + ) -> dict[str, Any]: + '''Get symbol info for the exchange. + + ''' + # TODO: we can load from our self._pairs cache + # on repeat calls... + + # will retrieve all symbols by default + params = { + 'currency': currency.to_upper(), + 'kind': kind, + 'expired': expired + } + + resp = await self._api( + 'get_instrument', params=params) + + if 'result' in resp: + raise SymbolNotFound + + results = resp['result'] + + instruments = { + item['instrument_name']: item for item in results} + + if instrument is not None: + return instruments[instrument] + else: + return instruments + + async def cache_symbols( + self, + ) -> dict: + if not self._pairs: + self._pairs = await self.symbol_info() + + return self._pairs + + async def search_symbols( + self, + pattern: str, + limit: int = None, + ) -> dict[str, Any]: + if self._pairs is not None: + data = self._pairs + else: + data = await self.symbol_info() + + matches = fuzzy.extractBests( + pattern, + data, + score_cutoff=50, + ) + # repack in dict form + return {item[0]['instrument_name']: item[0] + for item in matches} + + async def bars( + self, + instrument: str, + start_dt: Optional[datetime] = None, + end_dt: Optional[datetime] = None, + as_np: bool = True, + ) -> dict: + + if end_dt is None: + end_dt = pendulum.now('UTC') + + if start_dt is None: + start_dt = end_dt.start_of( + 'minute').subtract(minutes=limit) + + start_time = deribit_timestamp(start_dt) + end_time = deribit_timestamp(end_dt) + + # https://docs.deribit.com/#public-get_tradingview_chart_data + response = await self._api( + 'get_tradingview_chart_data', + params={ + 'instrument_name': instrument.upper(), + 'start_timestamp': start_time, + 'end_timestamp': end_time, + 'resolution': '1' + } + ) + + klines = KLines(**response) + + result = klines.result + new_bars = [] + for i in range(len(result.close)): + + _open = result.open[i] + high = result.high[i] + low = result.low[i] + close = result.close[i] + volume = result.volume[i] + + row = [ + (start_time + (i * (60 * 1000))) / 1000.0, # time + result.open[i], + result.high[i], + result.low[i], + result.close[i], + result.volume[i] + ] + + new_bars.append((i,) + tuple(row)) + + array = np.array( + [i, ], dtype=_ohlc_dtype) if as_np else klines + return array + + +@acm +async def get_client() -> Client: + client = Client() + await client.cache_symbols() + yield client + + +# inside here we are in an asyncio context +async def open_aio_cryptofeed_relay( + from_trio: asyncio.Queue, + to_trio: trio.abc.SendChannel, + event_consumers: dict[str, trio.Event], + instruments: List[str] = [] +) -> None: + + async def trade_cb(feed, instrument, data: dict, receipt_timestamp): + to_trio.send_nowait({ + 'type': 'trade', + instrument: data, + 'receipt': receipt_timestamp}) + + async def l1_book_cb(feed, instrument, data: dict, receipt_timestamp): + to_trio.send_nowait({ + 'type': 'l1_book', + instrument: data, + 'receipt': receipt_timestamp}) + + + fh = FeedHandler() + fh.run(start_loop=False) + + fh.add_feed( + DERIBIT, + channels=[TRADES], + symbols=instruments, + callbacks={TRADES: TradeCallback(trade_cb)}) + + fh.add_feed( + DERIBIT, + channels=[L1_BOOK], + symbols=instruments, + callbacks={L1_BOOK: L1BookCallback(l1_book_cb)}) + + # sync with trio + to_trio.send_nowait(None) + + await from_trio.get() + + +@acm +async def open_cryptofeeds(): + + # try: + event_table = {} + + async with ( + to_asyncio.open_channel_from( + open_aio_cryptofeed_relay, + event_consumers=event_table, + instruments=['BTC-10JUN22-30000-C'] + ) as (first, chan), + trio.open_nursery() as n, + ): + assert first is None + + async def relay_events(): + async with chan.subscribe() as msg_stream: + async for msg in msg_stream: + print(msg) + + n.start_soon(relay_events) + + yield None + + await chan.send(None) + + +@acm +async def open_history_client( + instrument: str, +) -> tuple[Callable, int]: + + # TODO implement history getter for the new storage layer. + async with open_cached_client('deribit') as client: + + async def get_ohlc( + end_dt: Optional[datetime] = None, + start_dt: Optional[datetime] = None, + + ) -> tuple[ + np.ndarray, + datetime, # start + datetime, # end + ]: + + array = await client.bars( + instrument, + start_dt=start_dt, + end_dt=end_dt, + ) + start_dt = pendulum.from_timestamp(array[0]['time']) + end_dt = pendulum.from_timestamp(array[-1]['time']) + return array, start_dt, end_dt + + yield get_ohlc, {'erlangs': 3, 'rate': 3} + + +async def backfill_bars( + instrument: str, + shm: ShmArray, # type: ignore # noqa + task_status: TaskStatus[trio.CancelScope] = trio.TASK_STATUS_IGNORED, +) -> None: + """Fill historical bars into shared mem / storage afap. + """ + with trio.CancelScope() as cs: + async with open_cached_client('deribit') as client: + bars = await client.bars(instrument) + shm.push(bars) + task_status.started(cs) + + +async def stream_quotes( + + send_chan: trio.abc.SendChannel, + symbols: list[str], + feed_is_live: trio.Event, + loglevel: str = None, + + # startup sync + task_status: TaskStatus[tuple[dict, dict]] = trio.TASK_STATUS_IGNORED, + +) -> None: + # XXX: required to propagate ``tractor`` loglevel to piker logging + get_console_log(loglevel or tractor.current_actor().loglevel) + + sym_infos = {} + uid = 0 + + async with ( + open_cached_client('deribit') as client, + send_chan as send_chan, + ): + + # keep client cached for real-time section + cache = await client.cache_symbols() + + breakpoint() + + +@tractor.context +async def open_symbol_search( + ctx: tractor.Context, +) -> Client: + async with open_cached_client('deribit') as client: + + # load all symbols locally for fast search + cache = await client.cache_symbols() + await ctx.started() + + async with ctx.open_stream() as stream: + + async for pattern in stream: + # results = await client.symbol_info(sym=pattern.upper()) + + matches = fuzzy.extractBests( + pattern, + cache, + score_cutoff=50, + ) + # repack in dict form + await stream.send( + {item[0]['instrument_name']: item[0] + for item in matches} + )