def test_symmetric_very_not_equal(self):
db_balance = Balance({'USD': Money('50', 'USD'), 'BTC': Money('0', 'BTC')})
ledger_balance = Balance({
'USD': Money('-60', 'USD'),
'BTC': Money('100', 'BTC'),
})
auditing.balance_equality(db_balance, ledger_balance).should.equal(False)
def get_system_balances(self, exchanges):
system_balance = Balance()
for e in exchanges:
system_balance += e.exchange_account_db_object(
self.trading_db).balance
total_fiat = sum([
balance.to("USD")
for currency, balance in system_balance.iteritems()
if currency not in Money.CRYPTO_CURRENCIES
])
return system_balance, total_fiat
def test_complex_asymmetric_equal(self):
db_balance = Balance({
'USD': Money('50', 'USD'),
'CAD': Money('10000', 'CAD'),
'ETH': Money('0', 'ETH'),
'BTC': Money('0', 'BTC'),
})
ledger_balance = Balance({
'USD': Money('50', 'USD'),
'CAD': Money('10000', 'CAD'),
})
auditing.balance_equality(db_balance, ledger_balance).should.equal(True)
def get_balance_resp(self, req):
raw_balances = self.resp(req)
volume_currency_available = None
price_currency_available = None
for raw_balance in raw_balances:
if raw_balance['currency'] == self.volume_currency:
volume_currency_available = Money(
raw_balance['available'],
self.volume_currency,
)
elif raw_balance['currency'] == self.currency:
price_currency_available = Money(
raw_balance['available'],
self.currency,
)
if volume_currency_available == None or price_currency_available == None:
raise exceptions.ExchangeAPIErrorException(
self,
'missing expected balances',
)
balance = Balance()
balance[self.volume_currency] = volume_currency_available
balance[self.currency] = price_currency_available
return balance
def get_balance_time_series_from_audits(audits):
fiat_balances = []
btc_balances = []
for audit in audits:
timestamp = int(Delorean(audit.time_created, "UTC").epoch) * 1000
# load the fiat and btc balances from the audit data
data = json.loads(audit.data)
try:
# Old data format from before Jan 28, 2015
raw_fiat = data['exchange_balance']['fiat_available']
raw_btc = data['exchange_balance']['btc_available']
fiat = Money.loads(raw_fiat).to("USD")
btc = Money.loads(raw_btc)
except KeyError:
# New data format from after Jan 28, 2015
try:
balance_data = data['balance_data']
except KeyError:
continue
# convert to Money objects
for currency, balance_str in balance_data.iteritems():
balance_data[currency] = Money.loads(balance_str)
balance = Balance(balance_data)
fiat = balance.fiat().to('USD')
btc = balance['BTC']
fiat_datapoint = [
timestamp,
str(fiat.amount),
]
fiat_balances.append(fiat_datapoint)
btc_datapoint = [
timestamp,
str(btc.amount),
]
btc_balances.append(btc_datapoint)
return fiat_balances, btc_balances
def test_add_balance(self):
balance2 = Balance({
'USD': Money("50", "USD"),
'BTC': Money("2", "BTC")
})
new_balance = self.balance + balance2
new_balance['USD'].should.equal(Money("150", "USD"))
new_balance['BTC'].should.equal(Money("3", "BTC"))
def get_drift_from_audits(audits):
drift_by_currency = Balance()
for audit in audits:
if 'drift' in audit.data:
data = json.loads(audit.data)
for currency, str_amount in data['drift'].iteritems():
drift_by_currency += Money.loads(str_amount)
return drift_by_currency
def get_balance_resp(self, req):
response = self.resp(req)
try:
btc_balance = Money(response['btc_balance'], 'BTC')
cad_balance = Money(response['cad_balance'], 'CAD')
except KeyError:
raise exceptions.ExchangeAPIFailureException(self, response)
data = Balance()
data['BTC'] = btc_balance
data['CAD'] = cad_balance
return data
def get_liabilities_series(db, start_time, end_time):
liabilities_series = []
current_time = start_time
while current_time <= end_time:
debts = assets.get_active_liabilities(db, current_time)
debt_balance = sum([d.amount for d in debts], Balance())
liabilities_series.append((current_time, debt_balance))
current_time += datetime.timedelta(days=1)
return liabilities_series
def get_db_balances(exchanges):
db = session.get_a_trading_db_mysql_session()
db_balances = {}
db_balances['system'] = Balance()
try:
for exchange in exchanges:
exchange_data = exchange.exchange_account_db_object(db)
db_balances[exchange.name] = exchange_data.balance
db_balances['system']['USD'] += db_balances[exchange.name].fiat().to('USD')
db_balances['system']['BTC'] += db_balances[exchange.name]['BTC']
finally:
db.close()
return db_balances
def get_wire_fees_in_period_by_currency(db, start, end):
wire_fee_results = db\
.query(Transaction._fee_currency, func.sum(Transaction._fee))\
.filter(Transaction.time_created >= start)\
.filter(Transaction.time_created < end)\
.filter(Transaction._fee != None)\
.group_by(Transaction._fee_currency)\
.all()
wire_fees = Balance()
for fee_currency, fee_amount in wire_fee_results:
wire_fees[fee_currency] = Money(fee_amount, fee_currency)
return wire_fees
def balance_responses(exchanges, balance_requests):
"""
This function uses environment variables to set
a minimum balances for an exchange.
Format:{{exchange.name}}_MINIMUM_USD
Examples: BITSTAMP_MINIMUM_USD, CAVIRTEX_MINIMUM_BTC
"""
balances = {}
balances['system'] = Balance()
for exchange in exchanges:
req = balance_requests.pop(0)
balances[exchange.name] = exchange.get_balance_resp(req)
balances['system']['USD'] += balances[exchange.name].fiat().to('USD')
balances['system']['BTC'] += balances[exchange.name]['BTC']
return balances
def get_balance_resp(self, req):
response, headers = self.resp(req)
balance = Balance()
try:
for account in response:
if account['currency'] == 'BTC':
balance['BTC'] = Money(account['available'], 'BTC')
elif account['currency'] == self.currency:
balance[self.currency] = Money(account['available'],
self.currency)
except KeyError:
raise exceptions.ExchangeAPIErrorException(self,
'malformed response')
return balance
class TestBalance(unittest.TestCase):
def setUp(self):
self.balance = Balance({
'USD': Money("100", "USD"),
'BTC': Money("1", "BTC")
})
def tearDown(self):
pass
def test_empty(self):
balance = Balance()
balance['BTC'].should.equal(Money("0", "BTC"))
def test_add_balance(self):
balance2 = Balance({
'USD': Money("50", "USD"),
'BTC': Money("2", "BTC")
})
new_balance = self.balance + balance2
new_balance['USD'].should.equal(Money("150", "USD"))
new_balance['BTC'].should.equal(Money("3", "BTC"))
def test_add_money(self):
new_balance = self.balance + Money("0.2", "BTC")
new_balance['USD'].should.equal(Money("100", "USD"))
new_balance['BTC'].should.equal(Money("1.2", "BTC"))
def test_negate(self):
neg = -self.balance
neg['USD'].should.equal(Money("-100", "USD"))
neg['BTC'].should.equal(Money("-1", "BTC"))
def test_fiat(self):
fiat = self.balance.fiat()
fiat.should.equal(Money("100", "USD"))
def test_add_result_mutability(self):
m = Money(2, 'BTC')
new_balance = self.balance + m # => USD 100, BTC 3
new_balance['USD'].should.equal(Money("100", "USD"))
self.balance['USD'].amount += 10 # USD 110
# Changing self.balance shouldn't affect new_balance
new_balance['USD'].should.equal(Money("100", "USD"))
def balance_resp(self, req):
response = self.resp(req)
try:
balances = response['info']['funds']
btc_available = Money(balances['free']['btc'], 'BTC')
usd_available = Money(balances['free']['usd'], 'USD')
except KeyError:
raise exceptions.ExchangeAPIErrorException(
self,
'Balance missing expected keys',
)
balance = Balance()
balance['BTC'] = btc_available
balance['USD'] = usd_available
return balance
def get_balance_resp(self, req):
response = self.resp(req)
balance = Balance()
try:
vol_currency_key = '%s_available' % self.volume_currency.lower()
price_currency_key = '%s_available' % self.currency.lower()
balance[self.volume_currency] = Money(
response[vol_currency_key],
self.volume_currency,
)
balance[self.currency] = Money(response[price_currency_key], self.currency)
except KeyError:
raise exceptions.ExchangeAPIErrorException(
self,
'Balance missing expected keys',
)
return balance
def balance_resp(self, req):
raw_balances = self.resp(req)
btc_available = None
usd_available = None
for raw_balance in raw_balances:
if raw_balance['type'] == 'exchange':
if raw_balance['currency'] == 'btc':
btc_available = Money(raw_balance['available'], 'BTC')
elif raw_balance['currency'] == 'usd':
usd_available = Money(raw_balance['available'], 'USD')
if btc_available == None or usd_available == None:
raise exceptions.ExchangeAPIErrorException(
self,
'missing expected balances',
)
balance = Balance()
balance['BTC'] = btc_available
balance['USD'] = usd_available
return balance
def get_balance_resp(self, req):
response = self.resp(req)
total_balance = Balance()
# We only want to load the balances for the pair we trade on this account
# (BTC + self.currency). For example we have a small USD balance in our main
# EUR Kraken account which we want to ignore. Including it in the balance breaks
# some other parts of our system which expect to only find a single fiat
# currency.
supported_currencies = ['BTC', self.currency]
for currency in supported_currencies:
kraken_currency = self.convert_to_kraken_currency(currency)
balance_amount = Decimal(response[kraken_currency]['balance'])
credit_amount = Decimal(response[kraken_currency].get('credit_used', 0))
balance = Money(balance_amount, currency)
credit = Money(credit_amount, currency)
total_balance += (balance - credit)
return total_balance
def get_balance_resp(self, req):
response = self.resp(req)
raw_balances = response['balances']
btc_available = None
usd_available = None
for raw_balance in raw_balances:
if raw_balance['currency'] == 'XBT':
btc_available = Money(raw_balance['availableBalance'], 'BTC')
elif raw_balance['currency'] == 'USD':
usd_available = Money(raw_balance['availableBalance'], 'USD')
if btc_available is None or usd_available is None:
raise exceptions.ExchangeAPIErrorException(
self,
'missing expected balances',
)
balance = Balance()
balance['BTC'] = btc_available
balance['USD'] = usd_available
return balance
def test_trivial(self):
db_balance = Balance()
ledger_balance = Balance()
auditing.balance_equality(db_balance, ledger_balance).should.equal(True)
def test_empty(self):
balance = Balance()
balance['BTC'].should.equal(Money("0", "BTC"))
def setUp(self):
self.balance = Balance({
'USD': Money("100", "USD"),
'BTC': Money("1", "BTC")
})
def test_symmetric_equal(self):
db_balance = Balance({'USD': Money('50', 'USD'), 'BTC': Money('0', 'BTC')})
ledger_balance = Balance({'USD': Money('50', 'USD'), 'BTC': Money('0', 'BTC')})
auditing.balance_equality(db_balance, ledger_balance).should.equal(True)
