/**
 * Response DTO for getting device token
 *
 * Used to return just the device token from the current request context.
 * Device token is used for trusted device feature.
 *
 * @example
 * ```typescript
 * const result = await clientInfoService.getDeviceToken();
 * // Returns: { deviceToken: 'device-token-123' } or { deviceToken: undefined }
 * ```
 */
/**
 * Response DTO for device token
 */
export declare class GetDeviceTokenResponseDTO {
    /**
     * Device token for trusted device feature
     *
     * Extracted from cookie (nauth_device_token) or header (X-Device-Token).
     * Optional - undefined if not present.
     */
    deviceToken?: string;
}
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