85 lines
4.6 KiB
Python
85 lines
4.6 KiB
Python
# # ⚠ Warning
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
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# LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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# NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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# [🥭 Mango Markets](https://mango.markets/) support is available at:
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# [Docs](https://docs.mango.markets/)
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# [Discord](https://discord.gg/67jySBhxrg)
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# [Twitter](https://twitter.com/mangomarkets)
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# [Github](https://github.com/blockworks-foundation)
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# [Email](mailto:hello@blockworks.foundation)
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import logging
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import mango
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import traceback
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import rx
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from decimal import Decimal
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# # 🥭 Hedger class
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#
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# A `Hedger` watches for trades on one market and performs the opposite trade on a second market.
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#
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class Hedger(rx.core.typing.Disposable):
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def __init__(self, context: mango.Context, account: mango.Account, watched_market: mango.Market, hedge_market: mango.Market, initial: mango.PerpEventQueue, observable_event_queue: rx.Observable, operations: mango.MarketOperations, max_price_slippage_factor: Decimal):
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self.logger: logging.Logger = logging.getLogger(self.__class__.__name__)
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self.context: mango.Context = context
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self.account: mango.Account = account
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self.watched_market: mango.Market = watched_market
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self.hedge_market: mango.Market = hedge_market
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self.initial: mango.PerpEventQueue = initial
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self.observable_event_queue: rx.Observable = observable_event_queue
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self.splitter: mango.UnseenPerpEventChangesTracker = mango.UnseenPerpEventChangesTracker(initial)
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self.event_queue_subscription: rx.core.typing.Disposable = self.observable_event_queue.subscribe(
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on_next=self._trigger)
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self.buy_price_adjustment_factor: Decimal = Decimal("1") + max_price_slippage_factor
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self.sell_price_adjustment_factor: Decimal = Decimal("1") - max_price_slippage_factor
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self.operations: mango.MarketOperations = operations
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def _trigger(self, event_queue: mango.PerpEventQueue):
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try:
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unseen_events = self.splitter.unseen(event_queue)
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for unseen_event in unseen_events:
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if isinstance(unseen_event, mango.PerpFillEvent):
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if (unseen_event.maker == self.account.address) or (unseen_event.taker == self.account.address):
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if unseen_event.maker == unseen_event.taker:
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self.logger.info(
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f"Ignoring self-trade of {unseen_event.quantity:,.8f} at {unseen_event.price:,.8f} on {self.watched_market.symbol}.")
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else:
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self._hedge(unseen_event)
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except Exception:
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self.logger.error(
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f"[{self.context.name}] Error processing events from {self.watched_market.symbol} for hedging on {self.hedge_market.symbol} - {traceback.format_exc()}")
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def _hedge(self, event: mango.PerpFillEvent) -> None:
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opposite_side: mango.Side = mango.Side.BUY if event.side == mango.Side.SELL else mango.Side.SELL
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price_adjustment_factor: Decimal = self.sell_price_adjustment_factor if opposite_side == mango.Side.SELL else self.buy_price_adjustment_factor
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adjusted_price: Decimal = event.price * price_adjustment_factor
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quantity: Decimal = event.quantity
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order: mango.Order = mango.Order.from_basic_info(
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opposite_side, adjusted_price, event.quantity, mango.OrderType.IOC)
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up_or_down: str = "up to" if opposite_side == mango.Side.BUY else "down to"
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self.logger.info(
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f"Hedging {event.side} ({event.maker_order_id}) of {event.quantity:,.8f} at {event.price:,.8f} on {self.watched_market.symbol} with {opposite_side} of {quantity:,.8f} at {up_or_down} {adjusted_price:,.8f} on {self.hedge_market.symbol}\n\t{order}")
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try:
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self.operations.place_order(order)
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except Exception:
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self.logger.error(
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f"[{self.context.name}] Failed to hedge {self.watched_market.symbol} on {self.hedge_market.symbol} using order {order} - {traceback.format_exc()}")
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def dispose(self):
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self.event_queue_subscription.dispose()
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def __str__(self) -> str:
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return f"""« 𝙷𝚎𝚍𝚐𝚎𝚛 watching market '{self.watched_market.symbol}', hedging on '{self.hedge_market.symbol}'' »"""
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def __repr__(self) -> str:
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return f"{self}"
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