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# -*- encoding: utf8 -*- |
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'''Module exchange_rate: |
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This module is responsible for getting the conversion rates from different |
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bitcoin exchanges. |
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''' |
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import decimal |
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import json |
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from kivy.network.urlrequest import UrlRequest |
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from kivy.event import EventDispatcher |
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from kivy.properties import (OptionProperty, StringProperty, AliasProperty, |
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ListProperty) |
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from kivy.clock import Clock |
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from kivy.cache import Cache |
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# Register local cache |
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Cache.register('history_rate', timeout=220) |
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EXCHANGES = ["BitcoinAverage", |
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"BitcoinVenezuela", |
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"BitPay", |
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"Blockchain", |
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"BTCChina", |
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"CaVirtEx", |
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"Coinbase", |
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"CoinDesk", |
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"LocalBitcoins", |
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"Winkdex"] |
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HISTORY_EXCHNAGES = ['Coindesk', |
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'Winkdex', |
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'BitcoinVenezuela'] |
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class Exchanger(EventDispatcher): |
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''' Provide exchanges rate between crypto and different national |
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currencies. See Module Documentation for details. |
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''' |
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symbols = {'ALL': u'Lek', 'AED': u'د.إ', 'AFN':u'؋', 'ARS': u'$', |
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'AMD': u'֏', 'AWG': u'ƒ', 'ANG': u'ƒ', 'AOA': u'Kz', 'BDT': u'৳', |
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'BHD': u'BD', 'BIF': u'FBu', 'BTC': u'BTC', 'BTN': u'Nu', 'CDF': u'FC', |
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'CHF': u'CHF', 'CLF': u'UF', 'CLP':u'$', 'CVE': u'$', 'DJF':u'Fdj', |
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'DZD': u'دج', 'AUD': u'$', 'AZN': u'ман', 'BSD': u'$', 'BBD': u'$', |
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'BYR': u'p', 'CRC': u'₡', 'BZD': u'BZ$', 'BMD': u'$', 'BOB': u'$b', |
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'BAM': u'KM', 'BWP': u'P', 'BGN': 'uлв', 'BRL': u'R$', 'BND': u'$', |
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'KHR': u'៛', 'CAD': u'$', 'ERN': u'Nfk', 'ETB': u'Br', 'KYD': u'$', |
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'USD': u'$', 'CLP': u'$', 'HRK': u'kn', 'CUP': u'₱', 'CZK': u'Kč', |
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'DKK': u'kr', 'DOP': u'RD$', 'XCD': u'$', 'EGP': u'£', 'SVC': u'$' , |
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'EEK': u'kr', 'EUR': u'€', u'FKP': u'£', 'FJD': u'$', 'GHC': u'¢', |
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'GIP': u'£', 'GTQ': u'Q', 'GBP': u'£', 'GYD': u'$', 'HNL': u'L', |
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'HKD': u'$', 'HUF': u'Ft', 'ISK': u'kr', 'INR': u'₹', 'IDR': u'Rp', |
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'IRR': u'﷼', 'IMP': '£', 'ILS': '₪', 'COP': '$', 'JMD': u'J$', |
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'JPY': u'¥', 'JEP': u'£', 'KZT': u'лв', 'KPW': u'₩', 'KRW': u'₩', |
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'KGS': u'лв', 'LAK': u'₭', 'LVL': u'Ls', 'CNY': u'¥'} |
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_use_exchange = OptionProperty('Blockchain', options=EXCHANGES) |
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'''This is the exchange to be used for getting the currency exchange rates |
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''' |
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_currency = StringProperty('EUR') |
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'''internal use only |
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''' |
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def _set_currency(self, value): |
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value = str(value) |
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if self.use_exchange == 'CoinDesk': |
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self._update_cd_currency(self.currency) |
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return |
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self._currency = value |
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self.parent.electrum_config.set_key('currency', value, True) |
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def _get_currency(self): |
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self._currency = self.parent.electrum_config.get('currency', 'EUR') |
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return self._currency |
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currency = AliasProperty(_get_currency, _set_currency, bind=('_currency',)) |
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currencies = ListProperty(['EUR', 'GBP', 'USD']) |
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'''List of currencies supported by the current exchanger plugin. |
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:attr:`currencies` is a `ListProperty` default to ['Eur', 'GBP'. 'USD']. |
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''' |
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def _get_useex(self): |
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if not self.parent: |
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return self._use_exchange |
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self._use_exchange = self.parent.electrum_config.get('use_exchange', |
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'Blockchain') |
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return self._use_exchange |
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def _set_useex(self, value): |
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if not self.parent: |
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return self._use_exchange |
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self.parent.electrum_config.set_key('use_exchange', value, True) |
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self._use_exchange = value |
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use_exchange = AliasProperty(_get_useex, _set_useex, |
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bind=('_use_exchange', )) |
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def __init__(self, parent): |
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super(Exchanger, self).__init__() |
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self.parent = parent |
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self.quote_currencies = None |
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self.exchanges = EXCHANGES |
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self.history_exchanges = HISTORY_EXCHNAGES |
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def exchange(self, btc_amount, quote_currency): |
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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 * decimal.Decimal(quote_currencies[quote_currency]) |
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def get_history_rate(self, item, btc_amt, mintime, maxtime): |
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def on_success(request, response): |
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response = json.loads(response) |
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try: |
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hrate = response['bpi'][mintime] |
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hrate = abs(btc_amt) * decimal.Decimal(hrate) |
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Cache.append('history_rate', uid, hrate) |
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except KeyError: |
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hrate = 'not found' |
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self.parent.set_history_rate(item, hrate) |
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# Check local cache before getting data from remote |
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exchange = 'coindesk' |
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uid = '{}:{}'.format(exchange, mintime) |
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hrate = Cache.get('history_rate', uid) |
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if hrate: |
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return hrate |
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req = UrlRequest(url='https://api.coindesk.com/v1/bpi/historical' |
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'/close.json?start={}&end={}' |
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.format(mintime, maxtime) |
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,on_success=on_success, timeout=15) |
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return None |
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def update_rate(self, dt): |
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''' This is called from :method:`start` every X seconds; to update the |
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rates for currencies for the currently selected exchange. |
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''' |
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if not self.parent.network or not self.parent.network.is_connected(): |
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return |
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# temporarily disabled |
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return |
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update_rates = { |
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"BitcoinAverage": self.update_ba, |
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"BitcoinVenezuela": self.update_bv, |
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"BitPay": self.update_bp, |
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"Blockchain": self.update_bc, |
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"BTCChina": self.update_CNY, |
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"CaVirtEx": self.update_cv, |
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"CoinDesk": self.update_cd, |
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"Coinbase": self.update_cb, |
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"LocalBitcoins": self.update_lb, |
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"Winkdex": self.update_wd, |
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} |
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try: |
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update_rates[self.use_exchange]() |
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except KeyError: |
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return |
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def update_wd(self): |
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def on_success(request, response): |
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response = json.loads(response) |
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quote_currencies = {'USD': 0.0} |
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lenprices = len(response["prices"]) |
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usdprice = response['prices'][lenprices-1]['y'] |
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try: |
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quote_currencies["USD"] = decimal.Decimal(usdprice) |
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except KeyError: |
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pass |
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self.quote_currencies = quote_currencies |
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self.parent.set_currencies(quote_currencies) |
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req = UrlRequest( |
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url='https://winkdex.com/static/data/0_600_288.json', |
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on_success=on_success, |
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timeout=5) |
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def update_cd_currency(self, currency): |
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def on_success(request, response): |
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response = json.loads(response) |
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quote_currencies = self.quote_currencies |
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quote_currencies[currency] =\ |
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str(response['bpi'][str(currency)]['rate_float']) |
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self.parent.set_currencies(quote_currencies) |
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req = UrlRequest( |
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url='https://api.coindesk.com/v1/bpi/currentprice/'\ |
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+ str(currency) + '.json',on_success=on_success, timeout=5) |
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def update_cd(self): |
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def on_success(request, response): |
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quote_currencies = {} |
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response = json.loads(response) |
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for cur in response: |
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quote_currencies[str(cur["currency"])] = 0.0 |
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self.quote_currencies = quote_currencies |
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self.update_cd_currency(self.currency) |
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req = UrlRequest( |
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url='https://api.coindesk.com/v1/bpi/supported-currencies.json', |
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on_success=on_success, |
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timeout=5) |
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def update_cv(self): |
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def on_success(request, response): |
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response = json.loads(response) |
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quote_currencies = {"CAD": 0.0} |
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cadprice = response["last"] |
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try: |
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quote_currencies["CAD"] = decimal.Decimal(cadprice) |
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self.quote_currencies = quote_currencies |
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except KeyError: |
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pass |
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self.parent.set_currencies(quote_currencies) |
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req = UrlRequest(url='https://www.cavirtex.com/api/CAD/ticker.json', |
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on_success=on_success, |
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timeout=5) |
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def update_CNY(self): |
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def on_success(request, response): |
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quote_currencies = {"CNY": 0.0} |
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cnyprice = response["ticker"]["last"] |
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try: |
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quote_currencies["CNY"] = decimal.Decimal(cnyprice) |
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self.quote_currencies = quote_currencies |
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except KeyError: |
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pass |
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self.parent.set_currencies(quote_currencies) |
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req = UrlRequest(url='https://data.btcchina.com/data/ticker', |
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on_success=on_success, |
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timeout=5) |
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def update_bp(self): |
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def on_success(request, response): |
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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[str(r['code'])] = decimal.Decimal(r['rate']) |
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self.quote_currencies = quote_currencies |
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except KeyError: |
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pass |
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self.parent.set_currencies(quote_currencies) |
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req = UrlRequest(url='https://bitpay.com/api/rates', |
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on_success=on_success, |
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timeout=5) |
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def update_cb(self): |
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def _lookup_rate(response, quote_id): |
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return decimal.Decimal(str(response[str(quote_id)])) |
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def on_success(request, response): |
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quote_currencies = {} |
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try: |
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for r in response: |
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if r[:7] == "btc_to_": |
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quote_currencies[r[7:].upper()] =\ |
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_lookup_rate(response, r) |
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self.quote_currencies = quote_currencies |
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except KeyError: |
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pass |
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self.parent.set_currencies(quote_currencies) |
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req = UrlRequest( |
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url='https://coinbase.com/api/v1/currencies/exchange_rates', |
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on_success=on_success, |
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timeout=5) |
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def update_bc(self): |
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def _lookup_rate(response, quote_id): |
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return decimal.Decimal(str(response[str(quote_id)]["15m"])) |
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def on_success(request, response): |
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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] = _lookup_rate(response, r) |
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self.quote_currencies = quote_currencies |
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except KeyError, TypeError: |
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pass |
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self.parent.set_currencies(quote_currencies) |
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req = UrlRequest(url='https://blockchain.info/ticker', |
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on_success=on_success, |
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timeout=5) |
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def update_lb(self): |
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def _lookup_rate(response, quote_id): |
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return decimal.Decimal(response[str(quote_id)]["rates"]["last"]) |
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def on_success(request, response): |
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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] = _lookup_rate(response, r) |
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self.quote_currencies = quote_currencies |
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except KeyError: |
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pass |
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self.parent.set_currencies(quote_currencies) |
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req = UrlRequest( |
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url='https://localbitcoins.com/bitcoinaverage/ticker-all-currencies/', |
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on_success=on_success, |
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timeout=5) |
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def update_ba(self): |
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def on_success(request, response): |
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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] = decimal.Decimal(response[r][u'last']) |
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self.quote_currencies = quote_currencies |
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except TypeError: |
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pass |
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self.parent.set_currencies(quote_currencies) |
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req = UrlRequest(url='https://api.bitcoinaverage.com/ticker/global/all', |
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on_success=on_success, |
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timeout=5) |
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def update_bv(self): |
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def on_success(request, response): |
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quote_currencies = {} |
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try: |
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for r in response["BTC"]: |
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quote_currencies[r] = decimal.Decimal(response['BTC'][r]) |
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self.quote_currencies = quote_currencies |
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except KeyError: |
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pass |
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self.parent.set_currencies(quote_currencies) |
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req = UrlRequest(url='https://api.bitcoinvenezuela.com/', |
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on_success=on_success, |
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timeout=5) |
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def start(self): |
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self.update_rate(0) |
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# check every 20 seconds |
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Clock.unschedule(self.update_rate) |
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Clock.schedule_interval(self.update_rate, 20) |
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def stop(self): |
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Clock.unschedule(self.update_rate) |
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ThomasV
10 years ago