from decimal import Decimal from django.shortcuts import redirect from django.utils.translation import ugettext_lazy as _ from django.core.urlresolvers import reverse from .base import BackendBase class BitcoinBackend(BackendBase): """ Bitcoin backend. Connects to a bitcoind. """ backend_id = 'bitcoin' backend_verbose_name = _("Bitcoin") backend_display_name = _("Bitcoin") COIN = 100000000 def __init__(self, settings): from bitcoin import SelectParams from bitcoin.rpc import Proxy self.btc_value = settings.get('BITCOIN_VALUE') self.account = settings.get('ACCOUNT', 'ccvpn3') chain = settings.get('CHAIN') if chain: SelectParams(chain) self.url = settings.get('URL') if not self.url: return assert isinstance(self.btc_value, int) self.make_rpc = lambda: Proxy(self.url) self.rpc = self.make_rpc() self.backend_enabled = True def new_payment(self, payment): rpc = self.make_rpc() # bitcoins amount = (amount in cents) / (cents per bitcoin) btc_price = round(Decimal(payment.amount) / self.btc_value, 5) address = str(rpc.getnewaddress(self.account)) msg = _("Please send %(amount)s BTC to %(address)s") payment.status_message = msg % dict(amount=str(btc_price), address=address) payment.backend_extid = address payment.backend_data = dict(btc_price=str(btc_price), btc_address=address) payment.save() return redirect(reverse('payments:view', args=(payment.id,))) def check(self, payment): rpc = self.make_rpc() if payment.status != 'new': return btc_price = payment.backend_data.get('btc_price') address = payment.backend_data.get('btc_address') if not btc_price or not address: return btc_price = Decimal(btc_price) received = Decimal(rpc.getreceivedbyaddress(address)) / self.COIN payment.paid_amount = int(received * self.btc_value) payment.backend_data['btc_paid_price'] = str(received) if received >= btc_price: payment.user.vpnuser.add_paid_time(payment.time) payment.user.vpnuser.on_payment_confirmed(payment) payment.user.vpnuser.save() payment.status = 'confirmed' payment.save() def get_info(self): rpc = self.make_rpc() try: info = rpc.getinfo() if not info: return [(_("Status"), "Error: got None")] except Exception as e: return [(_("Status"), "Error: " + repr(e))] v = info.get('version', 0) return ( (_("Bitcoin value"), "%.2f €" % (self.btc_value / 100)), (_("Testnet"), info['testnet']), (_("Balance"), '{:f}'.format(info['balance'] / self.COIN)), (_("Blocks"), info['blocks']), (_("Bitcoind version"), '.'.join(str(v // 10 ** (2 * i) % 10 ** (2 * i)) for i in range(3, -1, -1))), ) def get_ext_url(self, payment): if not payment.backend_extid: return None return 'http://blockr.io/address/info/%s' % payment.backend_extid