#pragma once
#include <QString>
class DeviceIdentityHelper {
public:
 explicit DeviceIdentityHelper(const QString& installDir);
 bool ensureIssued(const QString& apiBaseUrl, const QString& clientToken, const QString& appId,
                   const QString& channel, const QString& licenseKey);
 bool verifyLocal(const QString& appId, const QString& channel);
 QString deviceId() const;
 QString errorString() const;
private:
 bool loadAndVerify(const QString& expectedAppId, const QString& expectedChannel);
 bool verifySignature(const QByteArray& payload, const QString& signatureBase64);
 QString m_installDir, m_deviceId, m_error;
};