LicensingExample.rb

def generate_random_uid
  # Generate a random value between 0 and 1 000 000
  base_pseudo_random_value = rand(1_000_000)
 
  uid = evil_maths(base_pseudo_random_value)
  return uid
end

if first_launch?
  uid = generate_random_uid()
  
  store_in_secret_place(uid)
  
  # Imagine we have two columns like so : |license|uid|.
  # At the beginning the license is not associated to any uid.
  # activate_in_database will just associate the license number to the computer UID
  # Something like : UPDATE Licenses set UID = :uid WHERE license_number = :license
  activate_in_database(uid,license) 
  # => Start software
else
  uid = retrieve_from_secret_place(uid)
  
  if online_record_exists?(uid)
     # => Start software
  else
     # => Show error message
  end
  
end