Interceptor.attach(Module.findExportByName(null, "_OBJC_CLASS_$_FBReadReceiptSender"), 
    onEnter: function(args)  /* bypass */ 
);

Official apps verify SSL/TLS certificates to prevent Man-in-the-Middle (MitM) attacks. Patched IPAs often disable these checks (SSL pinning) to allow the injection of tweaks or to facilitate traffic analysis. This leaves the user’s communication exposed to network surveillance.

The demand stems from missing features that users have requested for years. Despite being the world’s most popular messaging app (with over 1.3 billion monthly active users), Facebook Messenger lacks certain privacy controls that competitors like Telegram or Signal offer natively.

Facebook Messenger is among the most widely utilized instant messaging platforms globally. On Apple’s iOS ecosystem, applications are distributed as .ipa (iOS App Store Package) files. The official distribution channel is the App Store, which enforces code signing requirements mandated by Apple’s DRM system, FairPlay.

However, a subculture of software modification exists where users download "patched" versions of these applications. These modified IPAs are often touted as offering "ad-blocking," "dark modes" not native to the app, "spyware removal," or unlocked premium features. The process of creating a patched Messenger IPA involves bypassing Apple’s code signing enforcement and altering the binary code of the application.

%hook FBMessageReadReceiptSender
- (void)sendReadReceiptForMessage:(id)message 
    // Do nothing — patch out
    return;
%end