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Update __init__.py

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Moved to pow(10, on recommendation from core team 
Removed excessive boiler plating for simple function

Tested on sandbox with print output and in scratch

conn is HTTPSConnectionPool(host='api-public.sandbox.gdax.com', port=443)
conn is HTTPSConnectionPool(host='api-public.sandbox.gdax.com', port=443)
be_amount 0.00610615427076642
sym prec is 8
af_amount 0.00610615
b4_price 8188.46
sym prec is 2
af_price 8188.46
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creslin 2018-07-30 10:27:19 +00:00 committed by GitHub
parent 05463e3d91
commit 0682f142d2
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1 changed files with 4 additions and 14 deletions
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18
freqtrade/exchange/__init__.py
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@ -155,32 +155,22 @@ class Exchange(object):
''' '''
Returns the amount to buy or sell to a precision the Exchange accepts Returns the amount to buy or sell to a precision the Exchange accepts
Rounded down Rounded down
:param pair: the symbol
:param amount: amount
:return: amount
''' '''
if self._api.markets[pair]['precision']['amount']: if self._api.markets[pair]['precision']['amount']:
symbol_prec = self._api.markets[pair]['precision']['amount'] symbol_prec = self._api.markets[pair]['precision']['amount']
multiplier = int('1' + ('0' * symbol_prec)) big_amount = amount * pow(10, symbol_prec)
big_amount = amount * multiplier amount = floor(big_amount) / pow(10, symbol_prec)
round_down = floor(big_amount)
amount = round_down / multiplier
return amount return amount
def symbol_price_prec(self, pair, price: float): def symbol_price_prec(self, pair, price: float):
''' '''
Returns the price buying or selling with to the precision the Exchange accepts Returns the price buying or selling with to the precision the Exchange accepts
Rounds up Rounds up
:param pair: the symbol
:param price: amount
:return: price
''' '''
if self._api.markets[pair]['precision']['price']: if self._api.markets[pair]['precision']['price']:
symbol_prec = self._api.markets[pair]['precision']['price'] symbol_prec = self._api.markets[pair]['precision']['price']
multiplier = int('1' + ('0' * symbol_prec)) big_price = price * pow(10, symbol_prec)
big_price = price * multiplier price = ceil(big_price) / pow(10, symbol_prec)
round_up = ceil(big_price)
price = round_up / multiplier
return price return price
def buy(self, pair: str, rate: float, amount: float) -> Dict: def buy(self, pair: str, rate: float, amount: float) -> Dict: