ENH: wrapping up asset min_trade_size for fractional coinsup to 1/100000000th of a coin

catalyst/data/bundles/base_pricing.py

@@ -24,6 +24,7 @@ class BasePricingBundle(BaseBundle):
             ('start_date', 'datetime64[ns]'),
             ('end_date', 'datetime64[ns]'),
             ('ac_date', 'datetime64[ns]'),
+            ('min_trade_size', 'float'),
         ]
 
     @lazyval

catalyst/data/bundles/poloniex.py

@@ -75,12 +75,14 @@ class PoloniexBundle(BaseCryptoPricingBundle):
         start_date = sym_data.index[0]
         end_date = sym_data.index[-1]
         ac_date = end_date + pd.Timedelta(days=1)
+        min_trade_size = 0.00000001
 
         return (
             sym_md.symbol,
             start_date,
             end_date,
             ac_date,
+            min_trade_size,
         )
 
     def fetch_raw_symbol_frame(self,