stable/exchange.py

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import enum
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import logging
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from typing import List
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from bittrex.bittrex import Bittrex
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logger = logging.getLogger(__name__)
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# Current selected exchange
EXCHANGE = None
_API = None
_CONF = {}
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class Exchange(enum.Enum):
BITTREX = 1
def init(config: dict) -> None:
"""
Initializes this module with the given config,
it does basic validation whether the specified
exchange and pairs are valid.
:param config: config to use
:return: None
"""
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global _API, EXCHANGE
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_CONF.update(config)
if config['dry_run']:
logger.info('Instance is running with dry_run enabled')
use_bittrex = config.get('bittrex', {}).get('enabled', False)
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if use_bittrex:
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EXCHANGE = Exchange.BITTREX
_API = Bittrex(api_key=config['bittrex']['key'], api_secret=config['bittrex']['secret'])
else:
raise RuntimeError('No exchange specified. Aborting!')
# Check if all pairs are available
markets = get_markets()
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exchange_name = EXCHANGE.name.lower()
for pair in config[exchange_name]['pair_whitelist']:
if pair not in markets:
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raise RuntimeError('Pair {} is not available at {}'.format(pair, exchange_name))
def buy(pair: str, rate: float, amount: float) -> str:
"""
Places a limit buy order.
:param pair: Pair as str, format: BTC_ETH
:param rate: Rate limit for order
:param amount: The amount to purchase
:return: order_id of the placed buy order
"""
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if _CONF['dry_run']:
return 'dry_run'
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elif EXCHANGE == Exchange.BITTREX:
data = _API.buy_limit(pair.replace('_', '-'), amount, rate)
if not data['success']:
raise RuntimeError('BITTREX: {}'.format(data['message']))
return data['result']['uuid']
def sell(pair: str, rate: float, amount: float) -> str:
"""
Places a limit sell order.
:param pair: Pair as str, format: BTC_ETH
:param rate: Rate limit for order
:param amount: The amount to sell
:return: None
"""
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if _CONF['dry_run']:
return 'dry_run'
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elif EXCHANGE == Exchange.BITTREX:
data = _API.sell_limit(pair.replace('_', '-'), amount, rate)
if not data['success']:
raise RuntimeError('BITTREX: {}'.format(data['message']))
return data['result']['uuid']
def get_balance(currency: str) -> float:
"""
Get account balance.
:param currency: currency as str, format: BTC
:return: float
"""
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if _CONF['dry_run']:
return 999.9
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elif EXCHANGE == Exchange.BITTREX:
data = _API.get_balance(currency)
if not data['success']:
raise RuntimeError('BITTREX: {}'.format(data['message']))
return float(data['result']['Balance'] or 0.0)
def get_ticker(pair: str) -> dict:
"""
Get Ticker for given pair.
:param pair: Pair as str, format: BTC_ETC
:return: dict
"""
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if EXCHANGE == Exchange.BITTREX:
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data = _API.get_ticker(pair.replace('_', '-'))
if not data['success']:
raise RuntimeError('BITTREX: {}'.format(data['message']))
return {
'bid': float(data['result']['Bid']),
'ask': float(data['result']['Ask']),
'last': float(data['result']['Last']),
}
def cancel_order(order_id: str) -> None:
"""
Cancel order for given order_id
:param order_id: id as str
:return: None
"""
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if _CONF['dry_run']:
pass
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elif EXCHANGE == Exchange.BITTREX:
data = _API.cancel(order_id)
if not data['success']:
raise RuntimeError('BITTREX: {}'.format(data['message']))
def get_open_orders(pair: str) -> List[dict]:
"""
Get all open orders for given pair.
:param pair: Pair as str, format: BTC_ETC
:return: list of dicts
"""
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if _CONF['dry_run']:
return []
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elif EXCHANGE == Exchange.BITTREX:
data = _API.get_open_orders(pair.replace('_', '-'))
if not data['success']:
raise RuntimeError('BITTREX: {}'.format(data['message']))
return [{
'id': entry['OrderUuid'],
'type': entry['OrderType'],
'opened': entry['Opened'],
'rate': entry['PricePerUnit'],
'amount': entry['Quantity'],
'remaining': entry['QuantityRemaining'],
} for entry in data['result']]
def get_pair_detail_url(pair: str) -> str:
"""
Returns the market detail url for the given pair
:param pair: pair as str, format: BTC_ANT
:return: url as str
"""
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if EXCHANGE == Exchange.BITTREX:
return 'https://bittrex.com/Market/Index?MarketName={}'.format(pair.replace('_', '-'))
def get_markets() -> List[str]:
"""
Returns all available markets
:return: list of all available pairs
"""
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if EXCHANGE == Exchange. BITTREX:
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data = _API.get_markets()
if not data['success']:
raise RuntimeError('BITTREX: {}'.format(data['message']))
return [m['MarketName'].replace('-', '_') for m in data['result']]