Merge pull request #77 from f3rno/feature-order-callbacks

Feature: Order Callbacks & Cancel Order

Author: prdn

README.md

@@ -39,7 +39,6 @@ client = Bitfinex::RESTv2.new({
 Then use it to submit queries, i.e. `client.balances`
 
 ## Usage of WSv2
-
 To use version 2 of the WS API, construct a new client with your credentials, bind listeners to react to stream events, and open the connection:
 
 ```ruby
@@ -81,6 +80,33 @@ end
 client.open!
 ```
 
+### Order Manipulation
+Three methods are provided for dealing with orders: `submit_order`, `update_order` and `cancel_order`. All methods support callback blocks, which are triggered upon receiving the relevant confirmation notifications. Example:
+
+```ruby
+o = Bitfinex::Models::Order.new({
+  :type => 'EXCHANGE LIMIT',
+  :price => 3.0152235,
+  :amount => 2.0235235263262,
+  :symbol => 'tEOSUSD'
+})
+
+client.submit_order(o) do |order_packet|
+  p "recv order confirmation packet with ID #{order_packet.id}"
+
+  client.update_order({
+    :id => order_packet.id,
+    :price => '3.0'
+  }) do |update_packet|
+    p "updated order #{update_packet.id} with price #{update_packet.price}"
+
+    client.cancel_order(order_packet) do |canceled_order|
+      p "canceled order with ID #{canceled_order[0]}"
+    end
+  end
+end
+```
+
 ### Available Events
 #### Lifecycle Events
 * `:open`

examples/ws/v2/orders.rb

@@ -3,7 +3,8 @@
 client = Bitfinex::WSv2.new({
   :url => ENV['WS_URL'],
   :api_key => ENV['API_KEY'],
-  :api_secret => ENV['API_SECRET']
+  :api_secret => ENV['API_SECRET'],
+  :transform => true
 })
 
 client.on(:open) do
@@ -20,11 +21,24 @@
     :symbol => 'tEOSUSD'
   })
 
-  client.submit_order(o)
+  client.submit_order(o) do |order_packet|
+    p "recv order confirmation packet with ID #{order_packet.id}"
+
+    client.update_order({
+      :id => order_packet.id,
+      :price => '3.0'
+    }) do |update_packet|
+      p "updated order #{update_packet.id} with price #{update_packet.price}"
+
+      client.cancel_order(order_packet) do |canceled_order|
+        p "canceled order with ID #{canceled_order[0]}"
+      end
+    end
+  end
 end
 
 client.on(:notification) do |n|
-  p 'received notification: %s' % [n]
+  p 'received notification: %s' % [n.serialize.join('|')]
 end
 
 client.on(:order_new) do |msg|