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62 lines
1.9 KiB
62 lines
1.9 KiB
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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