Class: CBX

Inherits:
Object
  • Object
show all
Includes:
MarketData
Defined in:
lib/cbx.rb,
lib/cbx/feed.rb,
lib/cbx/trading.rb,
lib/cbx/version.rb,
lib/cbx/pagination.rb,
lib/cbx/market_data.rb

Overview

A CBX object exposes all of the functionality of the API through methods that return JSON objects.

Defined Under Namespace

Modules: MarketData, Pagination, Trading Classes: Feed

Constant Summary collapse

API_URL = 
'https://api.exchange.coinbase.com/'
VERSION = 
'0.1.2'

Instance Method Summary collapse

Methods included from MarketData

#candles, #currencies, #orderbook, #products, #stats, #ticker, #time, #trades

Constructor Details

#initialize(key = nil, secret = nil, passphrase = nil) ⇒ CBX

Returns a new instance of CBX.



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# File 'lib/cbx.rb', line 20

def initialize(key = nil, secret = nil, passphrase = nil)
  if key && secret && passphrase
    @key = key
    @secret = secret
    @passphrase = passphrase
    @authenticated = true
    extend Trading
  else
    @authenticated = false
  end
end

Instance Method Details

#authenticated? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cbx.rb', line 32

def authenticated?
  @authenticated
end

#delete(uri, json = nil, &block) ⇒ Object 



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# File 'lib/cbx.rb', line 80

def delete(uri, json = nil, &block)
  request(:delete, uri, json, &block)
end

#get(uri, json = nil, &block) ⇒ Object 



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# File 'lib/cbx.rb', line 72

def get(uri, json = nil, &block)
  request(:get, uri, json, &block)
end

#post(uri, json = nil, &block) ⇒ Object 



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# File 'lib/cbx.rb', line 76

def post(uri, json = nil, &block)
  request(:post, uri, json, &block)
end

#request(method, uri, json = nil) {|r.body| ... } ⇒ Object

Yields:

  • (r.body) 


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# File 'lib/cbx.rb', line 47

def request(method, uri, json = nil)
  params = json.to_json if json
  if authenticated?
    headers = { 
      'CB-ACCESS-SIGN' => sign('/' + uri, params, nil, method),
      'CB-ACCESS-TIMESTAMP' => Time.now.to_i,
      'CB-ACCESS-KEY' => @key,
      'CB-ACCESS-PASSPHRASE' => @passphrase,
      'Content-Type' => 'application/json'
    }
  else
    headers = { 'Content-Type' => 'application/json' }
  end

  if method == :get
    r = Unirest.get(API_URL + uri, headers: headers)
  elsif method == :post
    r = Unirest.post(API_URL + uri, headers: headers, parameters: params)
  elsif method == :delete
    r = Unirest.delete(API_URL + uri, headers: headers, parameters: params)
  end
  yield r.body if block_given?
  r.body
end

#sign(request_url = '', body = '', timestamp = nil, method = 'GET') ⇒ Object 



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# File 'lib/cbx.rb', line 36

def sign(request_url = '', body = '', timestamp = nil, method = 'GET')
  body = body.to_json if body.is_a?(Hash)
  timestamp = Time.now.to_i unless timestamp

  what = "#{timestamp}#{method.upcase}#{request_url}#{body}"
  # create a sha256 hmac with the secret
  secret = Base64.decode64(@secret)
  hash  = OpenSSL::HMAC.digest('sha256', secret, what)
  Base64.strict_encode64(hash)
end