Add disputing logic for EPP

db/migrate/20200421093637_create_disputes.rb

@@ -1,12 +1,12 @@
 class CreateDisputes < ActiveRecord::Migration[5.2]
   def change
     create_table :disputes do |t|
-      t.string :domain_name
-      t.string :password
-      t.date :expires_at
-      t.date :starts_at
+      t.string :domain_name, null: false
+      t.string :password, null: false
+      t.date :expires_at, null: false
+      t.date :starts_at, null: false
       t.text :comment
-      t.datetime :created_at
+      t.boolean :closed, null: false, default: false
 
       t.timestamps
     end