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100 lines
3.4 KiB
Python
100 lines
3.4 KiB
Python
from glom import glom
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from pydantic import ValidationError
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from core.lib import schemas
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from core.util import logs
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class BaseExchange(object):
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def __init__(self, account):
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name = self.__class__.__name__
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self.name = name.replace("Exchange", "").lower()
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self.account = account
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self.log = logs.get_logger(self.name)
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self.client = None
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self.set_schema()
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self.connect()
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def set_schema(self):
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raise NotImplementedError
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def connect(self):
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raise NotImplementedError
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def convert_spec(self, response, msg_type):
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# Does the schemas library have a library for this exchange name?
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if hasattr(schemas, f"{self.name}_s"):
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schema_instance = getattr(schemas, f"{self.name}_s")
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else:
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raise Exception(f"No schema for {self.name} in schema mapping")
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# Does the message type have a conversion spec for this message type?
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if hasattr(schema_instance, f"{msg_type}_schema"):
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schema = getattr(schema_instance, f"{msg_type}_schema")
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else:
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# Let us know so we can implement it, but don't do anything with it
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self.log.error(f"No schema for message: {msg_type} - {response}")
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# raise Exception(f"No schema for {msg_type} in schema mapping")
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return response
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# Use glom to convert the response to the schema
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converted = glom(response, schema)
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print(f"[{self.name}] Converted of {msg_type}: {converted}")
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return converted
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def call(self, method, *args, **kwargs) -> (bool, dict):
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if hasattr(self.client, method):
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try:
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response = getattr(self.client, method)(*args, **kwargs)
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if isinstance(response, list):
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response = {"itemlist": response}
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if method not in self.schema:
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self.log.error(f"Method cannot be validated: {method}")
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self.log.debug(f"Response: {response}")
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# return (False, f"Method cannot be validated: {method}")
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return (True, response)
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# Return a dict of the validated response
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response_valid = self.schema[method](**response).dict()
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# Convert the response to a format that we can use
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response_converted = self.convert_spec(response_valid, method)
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return (True, response_converted)
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except ValidationError as e:
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self.log.error(f"Could not validate response: {e}")
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return (False, e)
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except Exception as e:
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self.log.error(f"Error calling {method}: {e}")
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return (False, e)
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else:
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return (False, "No such method")
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def get_account(self):
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raise NotImplementedError
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def get_supported_assets(self):
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raise NotImplementedError
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def get_balance(self):
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raise NotImplementedError
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def get_market_value(self, symbol):
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raise NotImplementedError
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def post_trade(self, trade):
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raise NotImplementedError
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def get_trade(self, trade_id):
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raise NotImplementedError
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def update_trade(self, trade):
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raise NotImplementedError
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def cancel_trade(self, trade_id):
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raise NotImplementedError
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def get_position_info(self, symbol):
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raise NotImplementedError
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def get_all_positions(self):
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raise NotImplementedError
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