adds letter code verification

app/models/verification/letter.rb

@@ -1,16 +1,12 @@
 class Verification::Letter
   include ActiveModel::Model
 
-  attr_accessor :user, :address
+  attr_accessor :user, :address, :verification_code
 
   validates :user, presence: true
   validates :address, presence: true
   validate :correct_address
 
-  def initialize(attrs={})
-    @user = attrs[:user]
-  end
-
   def save
     valid? &&
     letter_requested! &&
@@ -22,7 +18,11 @@ class Verification::Letter
   end
 
   def letter_requested!
-    user.update(letter_requested_at: Time.now)
+    user.update(letter_requested_at: Time.now, letter_verification_code: four_digit_code)
+  end
+
+  def verify?
+    user.letter_verification_code == verification_code
   end
 
   def update_user_address
@@ -50,4 +50,8 @@ class Verification::Letter
       district:      address[:nombre_distrito] }
   end
 
+  def four_digit_code
+    rand.to_s[2..5]
+  end
+
 end