add BuyCryptoOrder and SellCryptoOrder entities

spec/factories/buy_crypto_orders.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: buy_crypto_orders
+#
+#  id                :bigint           not null, primary key
+#  paid_amount_cents :integer          default(0), not null
+#  received_amount   :decimal(20, 10)
+#  status            :string           not null
+#  created_at        :datetime         not null
+#  updated_at        :datetime         not null
+#  currency_id       :bigint           not null
+#  user_id           :bigint           not null
+#
+# Indexes
+#
+#  index_buy_crypto_orders_on_currency_id  (currency_id)
+#  index_buy_crypto_orders_on_user_id      (user_id)
+#
+# Foreign Keys
+#
+#  fk_rails_...  (currency_id => currencies.id)
+#  fk_rails_...  (user_id => users.id)
+#
+FactoryBot.define do
+  factory :buy_crypto_order do
+    association :user
+    association :currency
+    status { :processing }
+    paid_amount_cents { rand(10000) }
+    received_amount { rand * 10000 }
+  end
+end