Initial commit

app/api/v2/entities/trade.rb

@@ -0,0 +1,133 @@
+# encoding: UTF-8
+# frozen_string_literal: true
+
+module API
+  module V2
+    module Entities
+      class Trade < Base
+        expose(
+          :id,
+          documentation: {
+            type: String,
+            desc: 'Trade ID.'
+          }
+        )
+
+        expose(
+          :price,
+          documentation: {
+            type: BigDecimal,
+            desc: 'Trade price.'
+          }
+        )
+
+        expose(
+          :amount,
+          documentation: {
+            type: BigDecimal,
+            desc: 'Trade amount.'
+          }
+        )
+
+        expose(
+          :total,
+          documentation: {
+            type: BigDecimal,
+            desc: 'Trade total (Amount * Price).'
+          }
+        )
+
+        expose(
+          :fee_currency,
+          documentation: {
+            type: BigDecimal,
+            desc: 'Currency user\'s fees were charged in.'
+          },
+          if: ->(_, options) { options[:current_user] }
+        ) do |trade, options|
+            fee_currency(trade.order_for_member(options[:current_user]))
+          end
+
+        expose(
+          :fee,
+          documentation: {
+            type: BigDecimal,
+            desc: 'Percentage of fee user was charged for performed trade.'
+          },
+          if: ->(_, options) { options[:current_user] }
+        ) do |trade, options|
+            trade.order_fee(trade.order_for_member(options[:current_user]))
+          end
+
+        expose(
+          :fee_amount,
+          documentation: {
+            type: BigDecimal,
+            desc: 'Amount of fee user was charged for performed trade.'
+          },
+          if: ->(_, options) { options[:current_user] }
+        ) do |trade, options|
+            fee_amount(trade, trade.order_for_member(options[:current_user]))
+          end
+
+        expose(
+          :market_id,
+          as: :market,
+          documentation: {
+            type: String,
+            desc: 'Trade market id.'
+          }
+        )
+
+        expose(
+          :created_at,
+          format_with: :iso8601,
+          documentation: {
+            type: String,
+            desc: 'Trade create time in iso8601 format.'
+          }
+        )
+
+        expose(
+          :taker_type,
+          documentation: {
+            type: String,
+            desc: 'Trade taker order type (sell or buy).'
+          }
+        ) do |trade, _options|
+          trade.taker_order.side
+        end
+
+        expose(
+          :side,
+          if: ->(trade, options) { options[:side] || options[:current_user] },
+          documentation: {
+            type: String,
+            desc: 'Trade side.'
+          }
+        ) do |trade, options|
+          options[:side] || trade.side(options[:current_user])
+        end
+
+        expose(
+          :order_id,
+          documentation: {
+            type: Integer,
+            desc: 'Order id.'
+          },
+          if: ->(_, options) { options[:current_user] }
+        ) do |trade, options|
+          trade.order_for_member(options[:current_user]).id
+        end
+
+        def fee_amount(trade, order)
+          trade.order_fee(order) * (order.side == 'buy' ? trade.amount : trade.total)
+        end
+
+        def fee_currency(order)
+          order.side == 'buy' ? order.ask : order.bid
+        end
+      end
+    end
+  end
+end