def list(self, request):
pair_view_set = PairViewSet()
data = []
pairs_names = self._get_bestchange_pair_names()
pairs = Pair.objects.filter(disabled=False,
test_mode=False,
name__in=pairs_names)
for pair in pairs:
if not pair_view_set._get_dynamic_test_mode(pair):
order = Order(pair=pair, amount_base=Decimal('1'))
try:
order.calculate_quote_from_base()
except Price.DoesNotExist:
continue
data.append(self._get_order_return_data(order))
reverse_pair = pair.reverse_pair
if reverse_pair and not pair_view_set._get_dynamic_test_mode(
reverse_pair):
order = Order(pair=reverse_pair, amount_quote=Decimal('1'))
try:
order.calculate_base_from_quote()
except Price.DoesNotExist:
continue
data.append(self._get_order_return_data(order))
return Response(data)
def _create_order_with_default_values(self, pair):
base_maximal = pair.base.current_maximal_amount_to_sell
base_minimal = pair.base.minimal_amount
quote_maximal = pair.quote.maximal_amount
quote_minimal = pair.quote.minimal_amount
if pair.is_crypto:
amount_quote = \
quote_minimal * \
settings.DEFAULT_CRYPTO_ORDER_DEPOSIT_AMOUNT_MULTIPLIER
if amount_quote >= quote_maximal:
amount_quote = (quote_maximal + quote_minimal) / Decimal('2')
else:
amount_quote = settings.DEFAULT_FIAT_ORDER_DEPOSIT_AMOUNT
if amount_quote < quote_minimal:
amount_quote = \
quote_minimal \
* settings.DEFAULT_FIAT_ORDER_DEPOSIT_AMOUNT_MULTIPLIER
order = Order(pair=pair, amount_quote=amount_quote)
order.calculate_base_from_quote()
if all([
not base_minimal <= order.amount_base <= base_maximal,
base_maximal > base_minimal
]):
if order.amount_base > base_maximal:
# return value between minimal and maximal possible
# (closer to maximal to avoid minimal quote error)
amount_base = \
(base_minimal + Decimal('4') * base_maximal) / Decimal('5')
else:
amount_base = base_minimal
order = Order(pair=pair, amount_base=amount_base)
order.calculate_quote_from_base()
return order
def _get_order(self, request, pair_name=None):
amount_base = self._amount_to_decimal('amount_base')
amount_quote = self._amount_to_decimal('amount_quote')
if not pair_name:
raise self.PAIR_REQUIRED
try:
pair = Pair.objects.get(name=pair_name)
except (ObjectDoesNotExist, MultipleObjectsReturned):
raise self.PAIR_DOES_NOT_EXIST
if amount_base:
amount_base = Decimal(amount_base)
order = Order(pair=pair, amount_base=amount_base)
order.calculate_quote_from_base()
elif amount_quote:
amount_quote = Decimal(amount_quote)
order = Order(pair=pair, amount_quote=amount_quote)
order.calculate_base_from_quote()
else:
order = self._create_order_with_default_values(pair)
return order
