class Geocoder::Lookup::GooglePremier

def sign(string)
  raw_private_key = url_safe_base64_decode(Geocoder::Configuration.api_key[0])
  digest = OpenSSL::Digest::Digest.new('sha1')
  raw_signature = OpenSSL::HMAC.digest(digest, raw_private_key, string)
  url_safe_base64_encode(raw_signature)
end