mirror of
https://github.com/aljazceru/bitfinex-api-py.git
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121 lines
5.2 KiB
Python
121 lines
5.2 KiB
Python
from .. import serializers
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from .. types import *
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from .. exceptions import HandlerNotFound
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class PublicChannelsHandler(object):
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EVENTS = [
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"t_ticker_update", "f_ticker_update",
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"t_trade_executed", "t_trade_execution_update", "f_trade_executed", "f_trade_execution_update", "t_trades_snapshot", "f_trades_snapshot",
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"t_book_snapshot", "f_book_snapshot", "t_raw_book_snapshot", "f_raw_book_snapshot", "t_book_update", "f_book_update", "t_raw_book_update", "f_raw_book_update",
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"candles_snapshot", "candles_update",
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"derivatives_status_update",
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]
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def __init__(self, event_emitter, strict = True):
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self.event_emitter, self.strict = event_emitter, strict
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self.__handlers = {
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"ticker": self.__ticker_channel_handler,
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"trades": self.__trades_channel_handler,
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"book": self.__book_channel_handler,
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"candles": self.__candles_channel_handler,
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"status": self.__status_channel_handler
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}
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def handle(self, subscription, *stream):
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_clear = lambda dictionary, *args: { key: value for key, value in dictionary.items() if key not in args }
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if (channel := subscription["channel"]) and channel in self.__handlers.keys():
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return self.__handlers[channel](_clear(subscription, "event", "channel", "chanId"), *stream)
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if self.strict:
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raise HandlerNotFound(f"No handler found for channel <{subscription['channel']}>.")
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def __ticker_channel_handler(self, subscription, *stream):
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if subscription["symbol"].startswith("t"):
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return self.event_emitter.emit(
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"t_ticker_update",
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subscription,
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serializers.TradingPairTicker.parse(*stream[0])
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)
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if subscription["symbol"].startswith("f"):
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return self.event_emitter.emit(
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"f_ticker_update",
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subscription,
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serializers.FundingCurrencyTicker.parse(*stream[0])
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)
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def __trades_channel_handler(self, subscription, *stream):
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if (type := stream[0]) and type in [ "te", "tu", "fte", "ftu" ]:
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if subscription["symbol"].startswith("t"):
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return self.event_emitter.emit(
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{ "te": "t_trade_executed", "tu": "t_trade_execution_update" }[type],
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subscription,
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serializers.TradingPairTrade.parse(*stream[1])
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)
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if subscription["symbol"].startswith("f"):
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return self.event_emitter.emit(
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{ "fte": "f_trade_executed", "ftu": "f_trade_execution_update" }[type],
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subscription,
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serializers.FundingCurrencyTrade.parse(*stream[1])
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)
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if subscription["symbol"].startswith("t"):
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return self.event_emitter.emit(
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"t_trades_snapshot",
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subscription,
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[ serializers.TradingPairTrade.parse(*substream) for substream in stream[0] ]
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)
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if subscription["symbol"].startswith("f"):
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return self.event_emitter.emit(
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"f_trades_snapshot",
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subscription,
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[ serializers.FundingCurrencyTrade.parse(*substream) for substream in stream[0] ]
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)
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def __book_channel_handler(self, subscription, *stream):
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type = subscription["symbol"][0]
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if subscription["prec"] == "R0":
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_trading_pair_serializer, _funding_currency_serializer, IS_RAW_BOOK = serializers.TradingPairRawBook, serializers.FundingCurrencyRawBook, True
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else: _trading_pair_serializer, _funding_currency_serializer, IS_RAW_BOOK = serializers.TradingPairBook, serializers.FundingCurrencyBook, False
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if all(isinstance(substream, list) for substream in stream[0]):
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return self.event_emitter.emit(
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type + "_" + (IS_RAW_BOOK and "raw_book" or "book") + "_snapshot",
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subscription,
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[ { "t": _trading_pair_serializer, "f": _funding_currency_serializer }[type].parse(*substream) for substream in stream[0] ]
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)
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return self.event_emitter.emit(
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type + "_" + (IS_RAW_BOOK and "raw_book" or "book") + "_update",
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subscription,
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{ "t": _trading_pair_serializer, "f": _funding_currency_serializer }[type].parse(*stream[0])
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)
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def __candles_channel_handler(self, subscription, *stream):
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if all(isinstance(substream, list) for substream in stream[0]):
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return self.event_emitter.emit(
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"candles_snapshot",
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subscription,
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[ serializers.Candle.parse(*substream) for substream in stream[0] ]
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)
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return self.event_emitter.emit(
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"candles_update",
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subscription,
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serializers.Candle.parse(*stream[0])
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)
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def __status_channel_handler(self, subscription, *stream):
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if subscription["key"].startswith("deriv:"):
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return self.event_emitter.emit(
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"derivatives_status_update",
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subscription,
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serializers.DerivativesStatus.parse(*stream[0])
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) |