Airship\Cabin\Bridge\Blueprint\ChannelUpdates::parseChannelUpdateResponse PHP Method

    protected function parseChannelUpdateResponse(array $data, \DateTime $originated) : array
    {
        if ($data['status'] !== 'success') {
            throw new CouldNotUpdate($data['message'] ?? \__('An update error has occurred'));
        }
        $valid = [];
        if (!empty($data['no_updates'])) {
            // Verify signature of the "no updates" timestamp.
            $sig = Base64UrlSafe::decode($data['signature']);
            if (!AsymmetricCrypto::verify($data['no_updates'], $this->channelPublicKey, $sig, true)) {
                throw new CouldNotUpdate(\__('Invalid signature from channel'));
            }
            $time = (new \DateTime($data['no_updates']))->add(new \DateInterval('P01D'));
            if ($time < $originated) {
                throw new CouldNotUpdate(\__('Channel is reporting a stale "no update" status'));
            }
            // No updates.
            return [];
        }
        // Verify the signature of each update.
        foreach ($data['updates'] as $update) {
            $data = Base64UrlSafe::decode($update['data']);
            $sig = Base64UrlSafe::decode($update['signature']);
            if (AsymmetricCrypto::verify($data, $this->channelPublicKey, $sig, true)) {
                $dataInternal = \json_decode($data, true);
                $valid[] = ['id' => (int) $update['id'], 'stored' => $dataInternal['stored'], 'master_signature' => $dataInternal['master_signature'], 'root' => $dataInternal['root'], 'data' => $dataInternal['data']];
            }
        }
        // Sort by ID
        \uasort($valid, function (array $a, array $b) : int {
            return (int) ($a['id'] <=> $b['id']);
        });
        return $valid;
    }