src/Marketing/Services/MarketingBaseService.php
protected function getEbayHeaders()
    {
        $headers = [];

        // Add required headers first.
        $headers[self::HDR_AUTHORIZATION] = 'Bearer '.$this->getConfig('authorization');

        // Add optional headers.
        if ($this->getConfig('marketplaceId')) {
            $headers[self::HDR_MARKETPLACE_ID] = $this->getConfig('marketplaceId');
        }

        return $headers;
    }
protected function getEbayHeaders()
    {
        $headers = [];

        // Add required headers first.
        $headers[self::HDR_AUTHORIZATION] = 'Bearer '.$this->getConfig('authorization');

        // Add optional headers.
        if ($this->getConfig('marketplaceId')) {
            $headers[self::HDR_MARKETPLACE_ID] = $this->getConfig('marketplaceId');
        }

        return $headers;
    }
Builds the needed eBay HTTP headers.

@return array An associative array of eBay HTTP headers.