Shopware\Install\Services\ReleaseDownloader::getIndexedReleasesList PHP Method

    private function getIndexedReleasesList()
    {
        $client = new Client();
        $response = $client->get(self::DOWNLOAD_UPDATE_API);
        $signature = $response->getHeader('X-Shopware-Signature');
        if ($this->openSSLVerifier->isSystemSupported()) {
            if (!$this->openSSLVerifier->isValid($response->getBody(), $signature)) {
                throw new \RuntimeException('API signature verification failed');
            }
        }
        $releases = $response->json();
        if (empty($releases)) {
            throw new \RuntimeException("Could not get releases list package");
        }
        $indexedReleases = [];
        foreach ($releases as $release) {
            $indexedReleases[$release['version']] = $release;
        }
        return $indexedReleases;
    }