This is a paid asset, but now you can download Easy Unet/Mirror Packets Free.
Detail this asset from Unity Store: Original Link
Easy Unet Mirror Packets v1.0.3
Since UNET deprecation, asset was rewritten for Mirror Networking. Mirror asset will need to be imported first Link
Easy Packets (EP) makes it more convenient to send and handle messages in your Unet/Mirror applications.
Github – documentation + issues
Forum
Key points
– Allows replying to messages directly (main reason why I wrote this)
– Great base/framework for building your networked applications
– Messages can be constructed on the fly (directly to writer)
– Easy to handle peer state
– Internally uses Mirror messages
– It makes your code beautiful (check out documentation)
– It’s small, robust and performant
Think of it as a small addition to Mirror, which makes networking code easier to maintain and more enjoying to write ;).