remove currency model and all references

spec/factories/balances.rb

@@ -4,27 +4,23 @@
 #
 # Table name: balances
 #
-#  id          :bigint           not null, primary key
-#  amount      :decimal(20, 10)  default(0.0), not null
-#  created_at  :datetime         not null
-#  updated_at  :datetime         not null
-#  currency_id :bigint           not null
-#  user_id     :bigint           not null
+#  id         :bigint           not null, primary key
+#  amount     :decimal(20, 10)  default(0.0), not null
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#  user_id    :bigint           not null
 #
 # Indexes
 #
-#  index_balances_on_currency_id  (currency_id)
-#  index_balances_on_user_id      (user_id)
+#  index_balances_on_user_id  (user_id)
 #
 # Foreign Keys
 #
-#  fk_rails_...  (currency_id => currencies.id)
 #  fk_rails_...  (user_id => users.id)
 #
 FactoryBot.define do
   factory :balance do
     association :user
-    association :currency
     amount { (rand * (10000 - 0) + 0) }
   end
 end

spec/factories/buy_crypto_orders.rb

@@ -10,23 +10,19 @@
 #  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)
+#  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 }

spec/factories/currencies.rb

@@ -1,16 +0,0 @@
-# frozen_string_literal: true
-
-# == Schema Information
-#
-# Table name: currencies
-#
-#  id         :bigint           not null, primary key
-#  name       :string           not null
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#
-FactoryBot.define do
-  factory :currency do
-    name { "CAKE" }
-  end
-end

spec/factories/sell_crypto_orders.rb

@@ -10,23 +10,19 @@
 #  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_sell_crypto_orders_on_currency_id  (currency_id)
-#  index_sell_crypto_orders_on_user_id      (user_id)
+#  index_sell_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 :sell_crypto_order do
     association :user
-    association :currency
     status { :processing }
     received_amount_cents { rand(10000) }
     paid_amount { rand * 10000 }

spec/factories/stake_orders.rb

@@ -4,23 +4,20 @@
 #
 # Table name: stake_orders
 #
-#  id          :bigint           not null, primary key
-#  amount      :decimal(20, 10)  default(0.0), not null
-#  pool_name   :string           not null
-#  status      :string           not null
-#  created_at  :datetime         not null
-#  updated_at  :datetime         not null
-#  currency_id :bigint
-#  user_id     :bigint           not null
+#  id         :bigint           not null, primary key
+#  amount     :decimal(20, 10)  default(0.0), not null
+#  pool_name  :string           not null
+#  status     :string           not null
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#  user_id    :bigint           not null
 #
 # Indexes
 #
-#  index_stake_orders_on_currency_id  (currency_id)
-#  index_stake_orders_on_user_id      (user_id)
+#  index_stake_orders_on_user_id  (user_id)
 #
 # Foreign Keys
 #
-#  fk_rails_...  (currency_id => currencies.id)
 #  fk_rails_...  (user_id => users.id)
 #
 FactoryBot.define do