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OandaExchange

API for OANDA exchange webservices

Installation

Add this line to your application's Gemfile:

gem 'oanda_exchange', :git => "git://github.com/dpisarewski/oanda_exchange.git"

And then execute:

bundle install

Usage

  1. Copy oanda_api.yml into rails config directrory

  2. Insert your client_id from your OANDA subscription

  3. Use Oanda.exchange(base_currency, options) method to convert currency

Examples:

Oanda.exchange(:usd, :to => :eur)
Oanda.exchange(:eur, :to => :usd, :date => Date.new(2010, 1, 1), :days => 14, :amount => 200, :interbank => 2)

To use exchange with ruby money(http://money.rubyforge.org/) add into your application configuration:

Money.default_bank = OandaBank.new

To obtain a hash with all supported currencies use

Oanda.currencies

To avoid API calls to OANDA in test environment you can use predefined stubs:

OandaExchange::Stubs.stub!(options)

options can be :currencies and :rates. :currencies should be a hash that is returned by Oanda.currencies. Default value for :currencies is {"USD" => "US Dollar", "EUR" => "Euro"}

:rates should be a hash that is used for currency conversion by Oanda.exchange. Default value for rates is {"USD" => 1, "others" => 1.5}

For example

OandaExchange::Stubs.stub! :currencies => {"USD" => "US Dollar",
                                           "CAD" => "Canadian Dollar",
                                           "RUB" => "Russian Rouble"},
                           :rates =>      {"CAD" => 0.7, "RUB" => 0.03}