Working on a new feature for this repos. Not an issue. about growbrewproxy

[playingoDEERUX]

Packet Type 0 is used for movement request, it is also the same packet type being broadcasted to all clients in a world to let other players know about your movement after validation is passed.

What you wanna do is send that packet multiple times with not too big X/Y difference to prevent autoban depending on how far the path is.

Then you should be able to securely break the tile (by "secure", I mean most likely in a way to not get autobanned and/or getting your break/place request rejected) with the Packet Type 3 packet.

So to move, you should set the Packet Type to 0, X/Y always a bit closer to the tile you wanna reach (via a loop you ensure you reached close enough to that tile by constantly making the X/Y pos getting more closer and resending the packet)
And you want to keep XSpeed and YSpeed in mind, if they are 0 or very low and it does not keep up with the amount of X/Y you have changed, it might seem suspicious to the server and you may get banned.

And at least, maybe keep track of the "ExtDataMask" value because the server uses its bits (32 bit int) to determine what type of 'movement state' your character is currently having active, it could be currently being hit by lava, walking left/right (I think they just used a single bit set for that whether its off or on at a certain position, don't remember them all by my head) or whether the character is having the jump animation/sprite active etc...

That's basically it.