@class NSData, NSString; @interface NGMPrekeySignatureFormatter : NSObject <SignatureFormatter> @property (readonly, nonatomic) NSData *prekeyPublic; @property (readonly, nonatomic) double timestamp; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; @end