Example of how Btce::TradeAPI could be initialized

output

#<TradeAPI:0x007fd9143fc6c8 @key="YOUR-API-KEY", @secret="YOUR-SECRET-KEY">
#<TradeAPI:0x007fd9144134e0 @key="MY-OTHER-API-KEY", @secret="MY-OTHER-SECRET-KEY">
#<TradeAPI:0x007fd9144129a0 @key="Master key!", @secret="Super S33krit">

tradeapi.rb

#! /usr/bin/env ruby

require 'yaml'
require 'pp'

class TradeAPI < Object

  # default to btce-api-key.yml as the key file argument
  def initialize(options = {:key_file => 'btce-api-key.yml'})
    # process yml file first
    data = {}
    if options.has_key?(:key_file) && File.exists?(options[:key_file])
      data = YAML::load(
        File.open(options[:key_file])
      )
    end

    @key    = data.fetch('key', nil)
    @secret = data.fetch('secret', nil)

    # if :key and/or :secret are explicitly specified, those arguments take
    # precedence
    @key    = options.fetch(:key, @key)
    @secret = options.fetch(:secret, @secret)

    unless @key && @secret
      # throw exception, key and secret must be set, either as args or in yml
      # file
      raise ArgumentError, "Both :key and :secret must be set."
    end

    puts "#{self.inspect}"
  end

end

t = TradeAPI.new

t = TradeAPI.new :key_file => 'other-btce-api-key.yml'

t = TradeAPI.new :key => "Master key!", :secret => "Super S33krit"