Initial commit

db/migrate/20180416160438_add_fee_to_orders.rb

@@ -0,0 +1,8 @@
+# encoding: UTF-8
+# frozen_string_literal: true
+
+class AddFeeToOrders < ActiveRecord::Migration[4.2]
+  def change
+    add_column :orders, :fee, :decimal, null: false, default: 0, precision: 7, scale: 6, after: :origin_volume
+  end
+end