Optimize encrypt attachment

dist/iOS/Crypto.framework/Versions/A/Headers/universe.objc.h

@@ -0,0 +1,28 @@
+// Objective-C API for talking to  Go package.
+//   gobind -lang=objc 
+//
+// File is generated by gobind. Do not edit.
+
+#ifndef __Universe_H__
+#define __Universe_H__
+
+@import Foundation;
+
+@protocol Universeerror;
+@class Universeerror;
+
+@protocol Universeerror <NSObject>
+- (NSString*)error;
+@end
+
+@class Universeerror;
+
+@interface Universeerror : NSError <goSeqRefInterface, Universeerror> {
+}
+@property(strong, readonly) id _ref;
+
+- (instancetype)initWithRef:(id)ref;
+- (NSString*)error;
+@end
+
+#endif