PayWithAmazon\Client::createServiceUrl PHP Метод

    private function createServiceUrl()
    {
        $this->modePath = strtolower($this->config['sandbox']) ? 'OffAmazonPayments_Sandbox' : 'OffAmazonPayments';
        if (!empty($this->config['region'])) {
            $region = strtolower($this->config['region']);
            if (array_key_exists($region, $this->regionMappings)) {
                $this->mwsEndpointUrl = $this->mwsServiceUrls[$this->regionMappings[$region]];
                $this->mwsServiceUrl = 'https://' . $this->mwsEndpointUrl . '/' . $this->modePath . '/' . self::SERVICE_VERSION;
                $this->mwsEndpointPath = '/' . $this->modePath . '/' . self::SERVICE_VERSION;
            } else {
                throw new \Exception($region . ' is not a valid region');
            }
        } else {
            throw new \Exception("config['region'] is a required parameter and is not set");
        }
    }