63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
from PyQt4.QtCore import SIGNAL
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import decimal
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import httplib
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import json
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import threading
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class Exchanger(threading.Thread):
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def __init__(self, parent):
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threading.Thread.__init__(self)
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self.daemon = True
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self.parent = parent
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self.quote_currencies = None
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self.lock = threading.Lock()
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# Do price discovery
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self.start()
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def exchange(self, btc_amount, quote_currency):
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with self.lock:
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if self.quote_currencies is None:
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return None
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quote_currencies = self.quote_currencies.copy()
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if quote_currency not in quote_currencies:
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return None
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return btc_amount * quote_currencies[quote_currency]
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def run(self):
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self.discovery()
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def discovery(self):
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try:
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connection = httplib.HTTPConnection('blockchain.info')
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connection.request("GET", "/ticker")
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except:
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return
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response = connection.getresponse()
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if response.reason == httplib.responses[httplib.NOT_FOUND]:
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return
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try:
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response = json.loads(response.read())
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except:
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return
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quote_currencies = {}
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try:
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for r in response:
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quote_currencies[r] = self._lookup_rate(response, r)
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with self.lock:
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self.quote_currencies = quote_currencies
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self.parent.emit(SIGNAL("refresh_balance()"))
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except KeyError:
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pass
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def get_currencies(self):
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return [] if self.quote_currencies == None else sorted(self.quote_currencies.keys())
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def _lookup_rate(self, response, quote_id):
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return decimal.Decimal(str(response[str(quote_id)]["15m"]))
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if __name__ == "__main__":
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exch = Exchanger(("BRL", "CNY", "EUR", "GBP", "RUB", "USD"))
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print exch.exchange(1, "EUR")
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