A gem to check prices and rates of brazil's public titles offered through Tesouro Direto It checks the actual prices and rates of those papers directly from the website where they are negociated

Add this line to your application's Gemfile:

gem 'cotacao_tesouro_direto'

And then execute:

$ bundle

Or install it yourself as:

$ gem install cotacao_tesouro_direto

After install the gem, require the library

require 'tesouro_direto'

To get updated data from STN site you just need call class method sync as bellow.

TesouroDireto::Price.sync

In case of the market being open when you request data the gem will response whtih a hash like the following, so you just need enjoy ;D!

{
 :updated_at => "2016-09-02T17:48:13+00:00",
 :titles => {
   :ntnc_2017 => {
     :abbreviation => "NTNC",
             :name => "Tesouro IGPM+ com Juros Semestrais 2017 (NTNC)",
      :expire_date => "2017-07-01",
         :buy_rate => nil,
        :sell_rate => 633.0,
        :buy_price => 0.0,
       :sell_price => 359975.0,
            :index => "ipca"
   },
   :ntnc_2021 => {
     :abbreviation => "NTNC",
             :name => "Tesouro IGPM+ com Juros Semestrais 2021 (NTNC)",
      :expire_date => "2021-04-01",
         :buy_rate => nil,
        :sell_rate => 609.0,
        :buy_price => 0.0,
       :sell_price => 365296.0,
            :index => "ipca"
   }...
 }
}

If the market isn't opened you will receive the object bellow:

{
  :update_at => nil
  :titles => nil
  :message => "The market isn't open, please try again latter."
}

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/cotacao_tesouro_direto.

The gem is available as open source under the terms of the MIT License.