Balances

Contributing

We are excited to open source Balances and get the community involved! Check out CONTRIBUTING.md for quick guide.

Setting up Environment

1. Run bundle install
2. Copy .sample.env to .env and update with all the necessary credentials. The required ones are SECRET_TOKEN and EMAIL_HASH_SALT.
3. Copy sample.database.yml to database.yml
4. Run rake db:create db:migrate
5. Run rake currency_conversions:populate
6. Run foreman start or rails s -p 5000

Adding a Currency

1. Add to app/modules/currencies/ a file named after the currency. e.g. app/modules/currencies/bitcoin.rb
2. Setup your new currency ruby file with API, CURRENCY_NAME, SHORT_NAME, SYMBOLS, #info, #balance, #valid?. e.g. see below
3. Add currency conversion methods to other currencies and base class. e.g. #to_btc
4. Add a currency scope and the currency to the CURRENCIES array in app/models/address.rb.
5. Update lib/tasks/currency_conversions.rake#populate.
6. Run rake currency_conversions:populate and rake currency_conversions:update
7. Update app/views/addresses/show.json.rabl to have corresponding balance_{{CURRENCY_SHORT_NAME}} node.
8. Update gon in app/controllers/application_controller.rb#setup_gon.
9. Update address templates for the sidebar balances, list, list totals, header and the JS view for list totals.
10. Update @mixin currency-symbols in app/assets/stylesheets/mixins_and_variables.scss.

Currency file example:

module Currencies
  class Bitcoin < Base

    API = 'https://btc.blockr.io/api/v1'
    CURRENCY_NAME = 'Bitcoin'
    SHORT_NAME = 'BTC'
    SYMBOLS = ['1']

    class << self

      def info(address)
        response = get_response("#{API}/address/info/#{address}")
        response[:data]
      end

      def balance(address)
        response = get_response("#{API}/address/info/#{address}")
        response[:data][:balance]
      end

      def first_tx_at(address)
        response = get_response("#{API}/address/info/#{address}")
        response[:data][:first_tx] ? response[:data][:first_tx][:time_utc] : nil
      end

      def valid?(address)
        response = get_response("#{API}/address/info/#{address}")
        response[:data][:is_valid]
      end

      # Conversions
      def to_btc(value)
        value.to_f
      end

    end
  end
end

Adding a Fiat Currency

1. Update app/modules/currencies.rb with corresponding to_{{CURRENCY_SHORT_NAME}} method.
2. Update app/models/currency_conversion.rb with a cache_to_{{CURRENCY_NAME}} method.
3. Update lib/tasks/currency_conversation.rake#update and then run it.
4. Update app/views/addresses/show.json.rabl with corresponding balance_{{CURRENCY_SHORT_NAME}} node.
5. Update balances and totals nodes in app/views/users/current_user.json.rabl.
6. Update gon.fiat_currencies in app/controllers/application_controller.rb#setup_gon.