models: create static create methods

bfxapi/models/Trade.py

@@ -4,17 +4,27 @@ class Trade:
   SHORT = 'SHORT'
   LONG = 'LONG'
 
-  def __init__(self, order, tag=''):
-    self.order = order
-    self.amount = order.amount
-    self.price = order.priceAvg
-    self.fee = (order.priceAvg * abs(order.amount)) * 0.002
-    self.mts = order.mtsCreate
-    self.date = datetime.datetime.fromtimestamp(order.mtsCreate/1000.0)
-    self.direction = self.SHORT if order.amount < 0 else self.LONG
-    self.tag = tag
+  def __init__(self, id, pair, mts_create, order_id, amount, price, order_type,
+      order_price, maker, fee, fee_currency):
+    self.id = id
+    self.pair = pair
+    self.mts_create = mts_create
+    self.date = datetime.datetime.fromtimestamp(mts_create/1000.0)
+    self.order_id = order_id
+    self.amount = amount
+    self.direction = Trade.SHORT if amount < 0 else Trade.LONG
+    self.price = price
+    self.order_type = order_type
+    self.order_price = order_price
+    self.maker = maker
+    self.fee = fee
+    self.fee_currency = fee_currency
+
+  @staticmethod
+  def from_raw_rest_trade(raw_trade):
+    # [24224048, 'tBTCUSD', 1542800024000, 1151353484, 0.09399997, 19963, None, None, -1, -0.000188, 'BTC']
+    return Trade(*raw_trade)
   
   def __str__(self):
-    ''' Allow us to print the Trade object in a pretty format '''
-    return "Trade {} @ {} fee={} <order='{}'>".format(
-      self.amount, self.price, self.fee, self.order)
+    return "Trade '{}' x {} @ {} <direction='{}' fee={}>".format(
+      self.pair, self.amount, self.price, self.direction, self.fee)