Bitpay\Client\Request::setHost PHP Method

    public function setHost($host)
    {
        $this->host = $host;
        return $this;
    }

 /**
  * @return RequestInterface
  */
 protected function createNewRequest()
 {
     $request = new Request();
     $request->setHost($this->network->getApiHost());
     $request->setPort($this->network->getApiPort());
     $this->prepareRequestHeaders($request);
     return $request;
 }