1.12.1 Vanilla - World Packets // OpCode

[Graype]

Hey! So I've writing a basic Realm server in C#, and now i'm moving onto the world. But I don't fully understand the world packets.
I'm confused on how to find the opcode from packets sent from the client..

I packet logged the outgoing packets on a Vanilla Server to investigate this issue more. I found that the first few bytes are random (Which leads me to believe there is some kind of encryption)

In this demonstration I /say the letter "a" 3 times in a row. I cannot find a pattern in the starting bytes (all random)



Any information would be great! Thanks