Class: Deribit::Request

Inherits:
Object
  • Object
show all
Defined in:
lib/deribit/request.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(key, secret, test_server: nil) ⇒ Request

Returns a new instance of Request.



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# File 'lib/deribit/request.rb', line 9

def initialize(key, secret, test_server: nil)
  test_server = ENV['DERIBIT_TEST_SERVER']  if test_server == nil
  @key = key
  @secret = secret
  @base_uri = test_server ? URI(TEST_URL) : URI(SERVER_URL)
end

Instance Attribute Details

#base_uri ⇒ Object

Returns the value of attribute base_uri.



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# File 'lib/deribit/request.rb', line 7

def base_uri
  @base_uri
end

#key ⇒ Object

Returns the value of attribute key.



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# File 'lib/deribit/request.rb', line 7

def key
  @key
end

#secret ⇒ Object

Returns the value of attribute secret.



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# File 'lib/deribit/request.rb', line 7

def secret
  @secret
end

Instance Method Details

#generate_signature(path, params = {}) ⇒ Object 



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# File 'lib/deribit/request.rb', line 53

def generate_signature(path, params = {})
  timestamp = Time.now.utc.to_i + 1000

  signature_data = {
    _:       timestamp,
    _ackey:  key,
    _acsec:  secret,
    _action: path
   }

  signature_data.update(params)
  sorted_signature_data = signature_data.sort

  converter = ->(data){
    key = data[0]
    value = data[1]
    if value.is_a?(Array)
      [key.to_s, value.join].join('=')
    else
      [key.to_s, value.to_s].join('=')
    end
  }

  items = sorted_signature_data.map(&converter)
  signature_string = items.join('&')

  sha256 = OpenSSL::Digest::SHA256.new
  sha256_signature = sha256.digest(signature_string.encode('utf-8'))

  base64_signature = Base64.encode64(sha256_signature).encode('utf-8')

  [key, timestamp, base64_signature].join('.').strip
end

#is_error_response?(response) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/deribit/request.rb', line 87

def is_error_response?(response)
  code = response.code.to_i
  code == 0 || code >= 400
end

#process(response) ⇒ Object

Raises:



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# File 'lib/deribit/request.rb', line 39

def process(response)
  json = JSON.parse(response.body, symbolize_names: true)

  raise Error.new(message: "Failed for #{key}: " + json[:message])  unless json[:success]

  if json.include?(:result)
    json[:result]
  elsif json.include?(:message)
    json[:message]
  else
    "ok"
  end
end

#send(path: DEFAULT_REQUEST_PATH, params: {}) ⇒ Object 



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# File 'lib/deribit/request.rb', line 16

def send(path: DEFAULT_REQUEST_PATH, params: {})
  uri = base_uri + path

			if path.start_with?(PRIVATE_PATH)
    request = Net::HTTP::Post.new(uri.path)
    request.body = URI.encode_www_form(params)
    request.add_field 'x-deribit-sig', generate_signature(path, params)

    response = Net::HTTP.start(uri.host, uri.port, use_ssl: true) do |http|
      http.request(request)
    end
  else
    uri.query = URI.encode_www_form(params)
    response = Net::HTTP.get_response(uri)
  end

  if is_error_response?(response)
    raise Error.new(code: response.code)
  else
    process(response)
  end
end