remove currency model and all references

app/graphql/inputs/create_buy_crypto_order_attributes_input.rb

@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 module Inputs
   class CreateBuyCryptoOrderAttributesInput < Types::BaseInputObject
-    argument :currency_id, ID, required: true
     argument :amount_cents, Integer, "Amount to be paid", required: true
   end
 end

app/graphql/inputs/create_sell_crypto_order_attributes_input.rb

@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 module Inputs
   class CreateSellCryptoOrderAttributesInput < Types::BaseInputObject
-    argument :currency_id, ID, required: true
     argument :amount, String, "Amount to be paid", required: true
   end
 end

app/graphql/mutations/create_buy_crypto_order.rb

@@ -6,8 +6,6 @@ module Mutations
     argument :order, Inputs::CreateBuyCryptoOrderAttributesInput, required: true
 
     def resolve(order:)
-      currency_id = decode_id(order[:currency_id])
-
       ActiveRecord::Base.transaction do
         current_user
           .fiat_balance
@@ -15,7 +13,6 @@ module Mutations
 
         record = BuyCryptoOrder.create!(
           paid_amount_cents: order[:amount_cents],
-          currency_id: currency_id,
           user_id: current_user.id,
         )
 

app/graphql/mutations/create_sell_crypto_order.rb

@@ -6,18 +6,15 @@ module Mutations
     argument :order, Inputs::CreateSellCryptoOrderAttributesInput, required: true
 
     def resolve(order:)
-      currency_id = decode_id(order[:currency_id])
       amount = BigDecimal(order[:amount])
 
       ActiveRecord::Base.transaction do
         current_user
-          .balances
-          .find_by!(currency_id: currency_id)
+          .balance
           .withdrawal!(amount)
 
         record = SellCryptoOrder.create!(
           paid_amount: amount,
-          currency_id: currency_id,
           user_id: current_user.id,
         )
 

app/graphql/mutations/create_stake_order.rb

@@ -6,18 +6,15 @@ module Mutations
     argument :order, Inputs::CreateStakeOrderAttributesInput, required: true
 
     def resolve(order:)
-      currency_id = Currency.find_by!(name: "CAKE").id
       amount = BigDecimal(order[:amount])
 
       ActiveRecord::Base.transaction do
         current_user
-          .balances
-          .find_by!(currency_id: currency_id)
+          .balance
           .withdrawal!(amount)
 
         record = StakeOrder.create!(
           amount: amount,
-          currency_id: currency_id,
           pool_name: order[:pool_name],
           user_id: current_user.id,
         )

app/graphql/mutations/create_stake_remove_order.rb

@@ -6,14 +6,12 @@ module Mutations
     argument :order, Inputs::CreateStakeOrderAttributesInput, required: true
 
     def resolve(order:)
-      currency_id = Currency.find_by!(name: "CAKE").id
       amount = -BigDecimal(order[:amount])
 
       ActiveRecord::Base.transaction do
         record = StakeOrder.find_or_initialize_by(
           pool_name: order[:pool_name],
           user_id: current_user.id,
-          currency_id: currency_id,
           status: :processing
         )
 

app/graphql/types/balance_type.rb

@@ -8,10 +8,5 @@ module Types
 
     field :id, ID, null: false
     field :amount, String, null: false
-
-    field :currency, CurrencyType, null: false
-    def currency
-      dataloader.with(Dataloader::Source, Currency).load(object.currency_id)
-    end
   end
 end

app/graphql/types/buy_crypto_order_type.rb

@@ -7,12 +7,6 @@ module Types
     graphql_name "BuyCryptoOrder"
 
     field :id, ID, null: false
-
-    field :currency, CurrencyType, null: false
-    def currency
-      dataloader.with(Dataloader::Source, Currency).load(object.currency_id)
-    end
-
     field :status, ProcessStatusEnum, null: false
     field :paid_amount_cents, Integer, null: false
     field :received_amount, String, null: true

app/graphql/types/currency_type.rb

@@ -1,12 +0,0 @@
-# frozen_string_literal: true
-module Types
-  class CurrencyType < Types::BaseObject
-    implements GraphQL::Types::Relay::Node
-    global_id_field :id
-
-    graphql_name "Currency"
-
-    field :id, ID, null: false
-    field :name, String, null: false
-  end
-end

app/graphql/types/query_type.rb

@@ -10,16 +10,6 @@ module Types
       context[:current_user]
     end
 
-    field :balances, BalanceType.connection_type, null: false
-    def balances
-      Pundit.policy_scope(current_user, Balance)
-    end
-
-    field :fiat_balances, FiatBalanceType.connection_type, null: false
-    def fiat_balances
-      Pundit.policy_scope(current_user, FiatBalance)
-    end
-
     field :sell_crypto_orders, SellCryptoOrderType.connection_type, null: false
     def sell_crypto_orders
       Pundit.policy_scope(current_user, SellCryptoOrder)

app/graphql/types/sell_crypto_order_type.rb

@@ -7,12 +7,6 @@ module Types
     graphql_name "SellCryptoOrder"
 
     field :id, ID, null: false
-
-    field :currency, CurrencyType, null: false
-    def currency
-      dataloader.with(Dataloader::Source, Currency).load(object.currency_id)
-    end
-
     field :status, ProcessStatusEnum, null: false
     field :paid_amount, String, null: false
     field :received_amount_cents, Integer, null: true

app/graphql/types/user_type.rb

@@ -11,5 +11,8 @@ module Types
     field :first_name, String, null: false
     field :last_name, String, null: false
     field :wallet_address, String, null: true
+
+    field :balance, BalanceType, null: false
+    field :fiat_balance, FiatBalanceType, null: false
   end
 end

app/graphql/x_stake_schema.rb

@@ -6,8 +6,6 @@ class XStakeSchema < GraphQL::Schema
 
   def self.resolve_type(abstract_type, obj, ctx)
     case obj
-    when Currency
-      Types::CurrencyType
     when Balance
       Types::BalanceType
     when FiatBalance