Is there any way to modify the protocol on server side? (maybe using fabric or spigot)

[YXHXianYu]

Is your feature request related to a problem? Please describe.
I want to get the cause of damage in entityHurt event

Describe the solution you'd like
I found that the cause of damage isn't sent to the client. So, this means we need to modify the protocol?
I'm trying to find a method to modify the protocol (maybe using fabric or spigot server)

Describe alternatives you've considered
Using another tool instead of mineflayer toolset? But, it may need lead to large amount of work.

Additional context
The packet of entityHurt:

Thanks If anyone has some relative information or solution! 😸 😸

[YXHXianYu]

I found that this spigot plugin ProtocolLib can modify the protocol. Solved!