Mine

Packet ID	Direction	Mojang Name	MCP Name
0x0E	Serverbound	PlayerActionPacket	Packet14BlockDig

Serverbound

Sent to the server when the player attempts to mine a block. If a block is mined, this must be followed up by a block update packet that turns it into air!

Field	Type	Description
Status	Byte	The action the player is taking against the block
X	Integer	The X position of the block
Y	Byte	The Y position of the block
Z	Integer	The Z position of the block
Face	Byte	The face of the block that's being mined

The status can represent one of three values.

Status	Value
Started digging	0
Finished digging	2
Drop item	4

Started digging is sent whenever a client wants to start mining a block. Finished digging is only sent when the client thinks its broken a block. as a result, it should be checked on the server-side if the amount of time the client took to break the block is appropriate. If a client stops breaking a block the server isn't informed of this.

Drop item is sent by the client whenever an item should be dropped from the player, such as when Q is pressed or when items are clicked outside of an inventory.

The face can be one of six values, representing the face being hit.

Value	0	1	2	3	4	5
Face	-Y	+Y	-Z	+Z	-X	+X

Example Packet

Serverbound

Field	Value
Status	0 (Started Digging)
X	-6231
Y	53
Z	563
Face	3 (+Z)