Return expiration and platform

OpenVPN Adapter/OpenVPNAdapter+Public.h

@@ -124,6 +124,16 @@ NS_SWIFT_NAME(handle(logMessage:));
  */
 @property (nonnull, readonly, nonatomic) OpenVPNInterfaceStats *interfaceStats;
 
+/**
+ Returns date/time of app expiration
+ */
++ (nonnull NSDate *)expiration;
+
+/**
+ Returns platform description
+ */
++ (nonnull NSString *)platform;
+
 /**
  <#Description#>
 

OpenVPN Adapter/OpenVPNAdapter.mm

@@ -158,6 +158,16 @@ NSString * const OpenVPNAdapterErrorEventKey = @"me.ss-abramchuk.openvpn-adapter
     return [[OpenVPNInterfaceStats alloc] initWithInterfaceStats:stats];
 }
 
++ (NSDate *)expiration {
+    NSNumber *time = [NSNumber numberWithInteger:OpenVPNClient::app_expire()];
+    return [NSDate dateWithTimeIntervalSince1970:[time doubleValue]];
+}
+
++ (NSString *)platform {
+    std::string platform = OpenVPNClient::platform();
+    return [NSString stringWithUTF8String:platform.c_str()];
+}
+
 #pragma mark Client Configuration
 
 - (OpenVPNProperties *)applyConfiguration:(nonnull OpenVPNConfiguration *)configuration error:(out NSError * __nullable * __nullable)error {