Difference between revisions of "Pre-release protocol"

Latest revision as of 19:57, 25 April 2024

This page documents the changes from the last stable Minecraft release (currently 1.20.4, protocol 765) to the current pre-release (currently 24w13a, protocol Snapshot 182). Note that this page contains bleeding-edge information that may not be completely or correctly documented.

One who wishes to commandeer the merging of this into Protocol when an update is made must be sure to respect any changes that may have occurred to the respective packets there.

1 Contents
- 1.1 Data types
- 1.2 Packets
2 New/modified data types
3 Entity Metadata
4 Block Actions
5 Inventories
6 Plugin Channels
7 Handshake
- 7.1 Serverbound
  - 7.1.1 Handshake
8 Status
- 8.1 Clientbound
- 8.2 Serverbound
9 Login
- 9.1 Clientbound
  - 9.1.1 Encryption Request
  - 9.1.2 Cookie Request (login)
- 9.2 Serverbound
  - 9.2.1 Cookie Response (login)
10 Configuration
- 10.1 Clientbound
- 10.2 Serverbound
  - 10.2.1 Cookie Response (configuration)
  - 10.2.2 Serverbound Known Packs
11 Play
- 11.1 Clientbound
- 11.2 Serverbound

Data types

No changes so far.

Packets

ID	Packet name	Documentation
Handshake serverbound
0x00	Handshake	Current	Pre
Login clientbound
0x01	Encryption Request	Current	Pre
0x05	Cookie Request (login)		Pre
Login serverbound
0x04	Cookie Response (login)		Pre
Configuration clientbound
0x00	Cookie Request (configuration)		Pre
~~0x00~~ 0x01	Clientbound Plugin Message (configuration)	Current	(unchanged)
~~0x01~~ 0x02	Disconnect (configuration)	Current	(unchanged)
~~0x02~~ 0x03	Finish Configuration	Current	(unchanged)
~~0x03~~ 0x04	Clientbound Keep Alive (configuration)	Current	(unchanged)
~~0x04~~ 0x05	Ping (configuration)	Current	(unchanged)
0x06	Reset Chat		Pre
~~0x05~~ 0x07	Registry Data	Current	Pre
~~0x06~~ 0x08	Remove Resource Pack (configuration)	Current	(unchanged)
~~0x07~~ 0x09	Add Resource Pack (configuration)	Current	(unchanged)
0x0A	Store Cookie (configuration)		Pre
0x0B	Transfer (configuration)		Pre
~~0x08~~ 0x0C	Feature Flags	Current	(unchanged)
~~0x09~~ 0x0D	Update Tags (configuration)	Current	(unchanged)
0x0E	Clientbound Known Packs		Pre
Configuration serverbound
0x01	Cookie Response (configuration)		Pre
~~0x01~~ 0x02	Serverbound Plugin Message (configuration)	Current	(unchanged)
~~0x02~~ 0x03	Finish Configuration	Current	(unchanged)
~~0x03~~ 0x04	Serverbound Keep Alive (configuration)	Current	(unchanged)
~~0x04~~ 0x05	Pong (configuration)	Current	(unchanged)
~~0x05~~ 0x06	Resource Pack Response (configuration)	Current	(unchanged)
0x07	Serverbound Known Packs		Pre
Play clientbound
0x16	Cookie Request (Play)		Pre
~~0x16~~ 0x17	Set Cooldown	Current	(unchanged)
~~0x17~~ 0x18	Chat Suggestions	Current	(unchanged)
~~0x18~~ 0x19	Clientbound Plugin Message (play)	Current	(unchanged)
~~0x19~~ 0x1A	Damage Event	Current	(unchanged)
0x1B	Debug Sample		Pre
~~0x1A~~ 0x1C	Delete Message	Current	(unchanged)
~~0x1B~~ 0x1D	Disconnect (play)	Current	(unchanged)
~~0x1C~~ 0x1E	Disguised Chat Message	Current	(unchanged)
~~0x1D~~ 0x1F	Entity Event	Current	(unchanged)
~~0x1E~~ 0x20	Explosion	Current	(unchanged)
~~0x1F~~ 0x21	Unload Chunk	Current	(unchanged)
~~0x20~~ 0x22	Game Event	Current	(unchanged)
~~0x21~~ 0x23	Open Horse Screen	Current	(unchanged)
~~0x22~~ 0x24	Hurt Animation	Current	(unchanged)
~~0x23~~ 0x25	Initialize World Border	Current	(unchanged)
~~0x24~~ 0x26	Clientbound Keep Alive (play)	Current	(unchanged)
~~0x25~~ 0x27	Chunk Data and Update Light	Current	(unchanged)
~~0x26~~ 0x28	World Event	Current	(unchanged)
~~0x27~~ 0x29	Particle	Current	(unchanged)
~~0x28~~ 0x2A	Update Light	Current	(unchanged)
~~0x29~~ 0x2B	Login (play)	Current	Pre
~~0x2A~~ 0x2C	Map Data	Current	(unchanged)
~~0x2B~~ 0x2D	Merchant Offers	Current	(unchanged)
~~0x2C~~ 0x2E	Update Entity Position	Current	(unchanged)
~~0x2D~~ 0x2F	Update Entity Position and Rotation	Current	(unchanged)
~~0x2E~~ 0x30	Update Entity Rotation	Current	(unchanged)
~~0x2F~~ 0x31	Move Vehicle	Current	(unchanged)
~~0x30~~ 0x32	Open Book	Current	(unchanged)
~~0x31~~ 0x33	Open Screen	Current	(unchanged)
~~0x32~~ 0x34	Open Sign Editor	Current	(unchanged)
~~0x33~~ 0x35	Ping (play)	Current	(unchanged)
~~0x34~~ 0x36	Ping Response (play)	Current	(unchanged)
~~0x35~~ 0x37	Place Ghost Recipe	Current	(unchanged)
~~0x36~~ 0x38	Player Abilities	Current	(unchanged)
~~0x37~~ 0x39	Player Chat Message	Current	(unchanged)
~~0x38~~ 0x3A	End Combat	Current	(unchanged)
~~0x39~~ 0x3B	Enter Combat	Current	(unchanged)
~~0x3A~~ 0x3C	Combat Death	Current	(unchanged)
~~0x3B~~ 0x3D	Player Info Remove	Current	(unchanged)
~~0x3C~~ 0x3E	Player Info Update	Current	(unchanged)
~~0x3D~~ 0x3F	Look At	Current	(unchanged)
~~0x3E~~ 0x40	Synchronize Player Position	Current	(unchanged)
~~0x3F~~ 0x41	Update Recipe Book	Current	(unchanged)
~~0x40~~ 0x42	Remove Entities	Current	(unchanged)
~~0x41~~ 0x43	Remove Entity Effect	Current	(unchanged)
~~0x42~~ 0x44	Reset Score	Current	(unchanged)
~~0x43~~ 0x45	Remove Resource Pack (play)	Current	(unchanged)
~~0x44~~ 0x46	Add Resource Pack (play)	Current	(unchanged)
~~0x45~~ 0x47	Respawn	Current	Pre
~~0x46~~ 0x48	Set Head Rotation	Current	(unchanged)
~~0x47~~ 0x49	Update Section Blocks	Current	(unchanged)
~~0x48~~ 0x4A	Select Advancements Tab	Current	(unchanged)
~~0x49~~ 0x4B	Server Data	Current	(unchanged)
~~0x4A~~ 0x4C	Set Action Bar Text	Current	(unchanged)
~~0x4B~~ 0x4D	Set Border Center	Current	(unchanged)
~~0x4C~~ 0x4E	Set Border Lerp Size	Current	(unchanged)
~~0x4D~~ 0x4F	Set Border Size	Current	(unchanged)
~~0x4E~~ 0x50	Set Border Warning Delay	Current	(unchanged)
~~0x4F~~ 0x51	Set Border Warning Distance	Current	(unchanged)
~~0x50~~ 0x52	Set Camera	Current	(unchanged)
~~0x51~~ 0x53	Set Held Item	Current	(unchanged)
~~0x52~~ 0x54	Set Center Chunk	Current	(unchanged)
~~0x53~~ 0x55	Set Render Distance	Current	(unchanged)
~~0x54~~ 0x56	Set Default Spawn Position	Current	(unchanged)
~~0x55~~ 0x57	Display Objective	Current	(unchanged)
~~0x56~~ 0x58	Set Entity Metadata	Current	(unchanged)
~~0x57~~ 0x59	Link Entities	Current	(unchanged)
~~0x58~~ 0x5A	Set Entity Velocity	Current	(unchanged)
~~0x59~~ 0x5B	Set Equipment	Current	(unchanged)
~~0x5A~~ 0x5C	Set Experience	Current	(unchanged)
~~0x5B~~ 0x5D	Set Health	Current	(unchanged)
~~0x5C~~ 0x5E	Update Objectives	Current	(unchanged)
~~0x5D~~ 0x5F	Set Passengers	Current	(unchanged)
~~0x5E~~ 0x60	Update Teams	Current	(unchanged)
~~0x5F~~ 0x61	Update Score	Current	(unchanged)
~~0x60~~ 0x62	Set Simulation Distance	Current	(unchanged)
~~0x61~~ 0x63	Set Subtitle Text	Current	(unchanged)
~~0x62~~ 0x64	Update Time	Current	(unchanged)
~~0x63~~ 0x65	Set Title Text	Current	(unchanged)
~~0x64~~ 0x66	Set Title Animation Times	Current	(unchanged)
~~0x65~~ 0x67	Entity Sound Effect	Current	(unchanged)
~~0x66~~ 0x68	Sound Effect	Current	(unchanged)
~~0x67~~ 0x69	Start Configuration	Current	(unchanged)
~~0x68~~ 0x6A	Stop Sound	Current	(unchanged)
0x6B	Store Cookie (Play)		Pre
~~0x69~~ 0x6C	System Chat Message	Current	(unchanged)
~~0x6A~~ 0x6D	Set Tab List Header And Footer	Current	(unchanged)
~~0x6B~~ 0x6E	Tag Query Response	Current	(unchanged)
~~0x6C~~ 0x6F	Pickup Item	Current	(unchanged)
~~0x6D~~ 0x70	Teleport Entity	Current	(unchanged)
~~0x6E~~ 0x71	Set Ticking State	Current	(unchanged)
~~0x6F~~ 0x72	Step Tick	Current	(unchanged)
0x73	Transfer (Play)		Pre
~~0x70~~ 0x74	Update Advancements	Current	(unchanged)
~~0x71~~ 0x75	Update Attributes	Current	Pre
~~0x72~~ 0x76	Entity Effect	Current	Pre
~~0x73~~ 0x77	Update Recipes	Current	(unchanged)
~~0x74~~ 0x78	Update Tags (play)	Current	(unchanged)
Play serverbound
0x04	Chat Command	Current	Pre
0x05	Signed Chat Command		Pre
~~0x05~~ 0x06	Chat Message	Current	(unchanged)
~~0x06~~ 0x07	Player Session	Current	(unchanged)
~~0x07~~ 0x08	Chunk Batch Received	Current	(unchanged)
~~0x08~~ 0x09	Client Status	Current	(unchanged)
~~0x09~~ 0x0A	Client Information (play)	Current	(unchanged)
~~0x0A~~ 0x0B	Command Suggestions Request	Current	(unchanged)
~~0x0B~~ 0x0C	Acknowledge Configuration	Current	(unchanged)
~~0x0C~~ 0x0D	Click Container Button	Current	(unchanged)
~~0x0D~~ 0x0E	Click Container	Current	(unchanged)
~~0x0E~~ 0x0F	Close Container	Current	(unchanged)
~~0x0F~~ 0x10	Change Container Slot State	Current	(unchanged)
0x11	Cookie Response (play)		Pre
~~0x10~~ 0x12	Serverbound Plugin Message (play)	Current	(unchanged)
0x13	Debug Sample Subscription		Pre
~~0x11~~ 0x14	Edit Book	Current	(unchanged)
~~0x12~~ 0x15	Query Entity Tag	Current	(unchanged)
~~0x13~~ 0x16	Interact	Current	(unchanged)
~~0x14~~ 0x17	Jigsaw Generate	Current	(unchanged)
~~0x15~~ 0x18	Serverbound Keep Alive (play)	Current	(unchanged)
~~0x16~~ 0x19	Lock Difficulty	Current	(unchanged)
~~0x17~~ 0x1A	Set Player Position	Current	(unchanged)
~~0x18~~ 0x1B	Set Player Position and Rotation	Current	(unchanged)
~~0x19~~ 0x1C	Set Player Rotation	Current	(unchanged)
~~0x1A~~ 0x1D	Set Player On Ground	Current	(unchanged)
~~0x1B~~ 0x1E	Move Vehicle	Current	(unchanged)
~~0x1C~~ 0x1F	Paddle Boat	Current	(unchanged)
~~0x1D~~ 0x20	Pick Item	Current	(unchanged)
~~0x1E~~ 0x21	Ping Request (play)	Current	(unchanged)
~~0x1F~~ 0x22	Place Recipe	Current	(unchanged)
~~0x20~~ 0x23	Player Abilities	Current	(unchanged)
~~0x21~~ 0x24	Player Action	Current	(unchanged)
~~0x22~~ 0x25	Player Command	Current	(unchanged)
~~0x23~~ 0x26	Player Input	Current	(unchanged)
~~0x24~~ 0x27	Pong (play)	Current	(unchanged)
~~0x25~~ 0x28	Change Recipe Book Settings	Current	(unchanged)
~~0x26~~ 0x29	Set Seen Recipe	Current	(unchanged)
~~0x27~~ 0x2A	Rename Item	Current	(unchanged)
~~0x28~~ 0x2B	Resource Pack Response (play)	Current	(unchanged)
~~0x29~~ 0x2C	Seen Advancements	Current	(unchanged)
~~0x2A~~ 0x2D	Select Trade	Current	(unchanged)
~~0x2B~~ 0x2E	Set Beacon Effect	Current	(unchanged)
~~0x2C~~ 0x2F	Set Held Item	Current	(unchanged)
~~0x2D~~ 0x30	Program Command Block	Current	(unchanged)
~~0x2E~~ 0x31	Program Command Block Minecart	Current	(unchanged)
~~0x2F~~ 0x32	Set Creative Mode Slot	Current	(unchanged)
~~0x30~~ 0x33	Program Jigsaw Block	Current	(unchanged)
~~0x31~~ 0x34	Program Structure Block	Current	(unchanged)
~~0x32~~ 0x35	Update Sign	Current	(unchanged)
~~0x33~~ 0x36	Swing Arm	Current	(unchanged)
~~0x34~~ 0x37	Teleport To Entity	Current	(unchanged)
~~0x35~~ 0x38	Use Item On	Current	(unchanged)
~~0x36~~ 0x39	Use Item	Current	(unchanged)

New/modified data types

No changes so far.

Entity Metadata

Type	Name	Value	Notes
0	Byte	Byte
1	VarInt	VarInt
2	VarLong	VarLong
3	Float	Float
4	String	String
5	Text Component	Text Component
6	Optional Text Component	(Boolean, Optional Text Component)	Text Component is present if the Boolean is set to true.
7	Slot	Slot
8	Boolean	Boolean
9	Rotations	(Float, Float, Float)	rotation on x, rotation on y, rotation on z
10	Position	Position
11	Optional Position	(Boolean, Optional Position)	Position is present if the Boolean is set to true.
12	Direction	VarInt Enum	Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5
13	Optional UUID	(Boolean, Optional UUID)	UUID is present if the Boolean is set to true.
14	Block State	VarInt	An ID in the block state registry.
15	Optional Block State	VarInt	0 for absent (air is unrepresentable); otherwise, an ID in the block state registry.
16	NBT	NBT
17	Particle	(VarInt, Varies)	particle type (an ID in the `minecraft:particle_type` registry), particle data (See Particles.)
18	Particles	(VarInt, Array of Particle)	length of array, particle data (See directly above.)
18 19	Villager Data	(VarInt, VarInt, VarInt)	villager type, villager profession, level (See below.)
19 20	Optional VarInt	VarInt	0 for absent; 1 + actual value otherwise. Used for entity IDs.
20 21	Pose	VarInt Enum	STANDING = 0, FALL_FLYING = 1, SLEEPING = 2, SWIMMING = 3, SPIN_ATTACK = 4, SNEAKING = 5, LONG_JUMPING = 6, DYING = 7, CROAKING = 8, USING_TONGUE = 9, SITTING = 10, ROARING = 11, SNIFFING = 12, EMERGING = 13, DIGGING = 14, SLIDING = 15, SHOOTING = 16, INHALING = 17
21 22	Cat Variant	VarInt	An ID in the `minecraft:cat_variant` registry.
22 23	Wolf Variant	VarInt	An ID in the `minecraft:wolf_variant` registry.
22 24	Frog Variant	VarInt	An ID in the `minecraft:frog_variant` registry.
23 25	Optional Global Position	(Boolean, Optional Identifier, Optional Position)	dimension identifier, position; only if the Boolean is set to true.
24 26	Painting Variant	VarInt	An ID in the `minecraft:painting_variant` registry.
25 27	Sniffer State	VarInt Enum	IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
26 28	Armadillo State	VarInt Enum	IDLE = 0, ROLLING = 1, SCARED = 2
26 29	Vector3	(Float, Float, Float)	x, y, z
27 30	Quaternion	(Float, Float, Float, Float)	x, y, z, w

Living Entity

TODO: This has changed to use the PARTICLES attribute

Wolf

Extends Tameable Animal.Inherited entity Tameable Animal does not existInherited entity Tameable Animal does not exist

Index	Type	Meaning	Default
0	Wolf Variant (22 23)	Wolf Variant	PALE
1	Boolean (8)	Is begging	false
2	VarInt (1)	Collar color (values are those used with dyes)	14 (Red)
3	VarInt (1)	Anger time	0

Armadillo

Extends Animal.

Index	Type	Meaning		Default
17	Armadillo State (26 28)	Armadillo State		IDLE

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Handshake

Serverbound

Handshake

This causes the server to switch into the target state.

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x00	Handshaking	Server	Protocol Version	VarInt	See protocol version numbers (currently 765 in Minecraft 1.20.4).
			Server Address	String (255)	Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect. The Notchian server does not use this information. Note that SRV records are a simple redirect, e.g. if _minecraft._tcp.example.com points to mc.example.org, users connecting to example.com will provide example.org as server address in addition to connecting to it.
			Server Port	Unsigned Short	Default is 25565. The Notchian server does not use this information.
			Next State	VarInt Enum	1 for Status, 2 for Login, 3 for Transfer.

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

Encryption Request

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x01	Login	Client	Server ID	String (20)	Appears to be empty.
			Public Key Length	VarInt	Length of Public Key.
			Public Key	Byte Array	The server's public key, in bytes.
			Verify Token Length	VarInt	Length of Verify Token. Always 4 for Notchian servers.
			Verify Token	Byte Array	A sequence of random bytes generated by the server.
			Should Authenticate	Boolean

Cookie Request (login)

Requests a cookie that was previously stored.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x05	Login	Client	Key		Identifier		The identifier of the cookie.

Serverbound

Cookie Response (login)

Response to a Cookie Request (login) from the server. The Notchian server only accepts responses of up to 5 kiB in size.

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x04	Login	Server	Key	Identifier	The identifier of the cookie.
			Has Payload	Boolean	The payload is only present if the cookie exists on the client.
			Payload Length	VarInt	Length of the following byte array.
			Payload	Optional Byte Array (5120)	The data of the cookie, if any.

Configuration

Clientbound

Cookie Request (configuration)

Requests a cookie that was previously stored.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x00	Configuration	Client	Key		Identifier		The identifier of the cookie.

Reset Chat

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x06	Configuration	Client	no fields

Registry Data

Represents certain registries that are sent from the server and are applied on the client. The packet is sent for each of the following registries: minecraft:worldgen/biome, minecraft:chat_type, minecraft:trim_pattern, minecraft:trim_material, minecraft:wolf_variant, minecraft:dimension_type, minecraft:damage_type, and minecraft:banner_pattern.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x07	Configuration	Client	Registry Codec		NBT (Compound)		See Registry Data.
			Registry ID		Identifier
			Entry Count		VarInt		Number of entries in the following array.
			Entries	Entry ID	Array	Identifier
				Has Data		Boolean	Whether the entry has any data following.
				Data		NBT Tag	Entry data. Only present if Has Data is true.

Store Cookie (configuration)

Stores some arbitrary data on the client, which persists between server transfers. The Notchian client only accepts cookies of up to 5 kiB in size.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x0A	Configuration	Client	Key		Identifier		The identifier of the cookie.
0x0A	Configuration	Client	Payload		ByteArray(5120)		The data of the cookie.

Transfer (configuration)

Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x0B	Configuration	Client	Host		String		The hostname of IP of the server.
0x0B	Configuration	Client	Port		VarInt		The port of the server.

Clientbound Known Packs

Informs the client of which data packs are present on the server. The client is expected to respond with its own Serverbown Known Packs packet. The Notchian server does not continue with Configuration until it receives a response.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x0E	Configuration	Client	Known Pack Count		VarInt		The number of known packs in the following array.
			Known Packs	Namespace	Array	String
				ID		String
				Version		String

Serverbound

Cookie Response (configuration)

Response to a Cookie Request (configuration) from the server. The Notchian server only accepts responses of up to 5 kiB in size.

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x01	Configuration	Server	Key	Identifier	The identifier of the cookie.
			Has Payload	Boolean	The payload is only present if the cookie exists on the client.
			Payload Length	VarInt	Length of the following byte array.
			Payload	Optional Byte Array (5120)	The data of the cookie, if any.

Serverbound Known Packs

ID 0x07, same structure as Clientbound Known Packs. If the client specifies a pack in this packet, the server should omit its contained data from Registry Data.

Play

Clientbound

Cookie Request (play)

Requests a cookie that was previously stored.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x16	Play	Client	Key		Identifier		The identifier of the cookie.

Debug Sample

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x1B	Play	Client	Sample Length	VarInt	The length of the following array.
			Sample	Long Array	TODO: What is the structure of the data in this array?
			Sample Type	VarInt Enum	The type of sample data. Currently always 0 (TICK_TIME).

Login (play)

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x2B	Play	Client	Entity ID	Int	The player's Entity ID (EID).
			Is hardcore	Boolean
			Dimension Count	VarInt	Size of the following array.
			Dimension Names	Array of Identifier	Identifiers for all dimensions on the server.
			Max Players	VarInt	Was once used by the client to draw the player list, but now is ignored.
			View Distance	VarInt	Render distance (2-32).
			Simulation Distance	VarInt	The distance that the client will process specific things, such as entities.
			Reduced Debug Info	Boolean	If true, a Notchian client shows reduced information on the debug screen. For servers in development, this should almost always be false.
			Enable respawn screen	Boolean	Set to false when the doImmediateRespawn gamerule is true.
			Do limited crafting	Boolean	Whether players can only craft recipes they have already unlocked. Currently unused by the client.
			Dimension Type	~~Identifier~~ VarInt	The ID of the type of dimension in the `minecraft:dimension_type` registry, defined by the Registry Data packet.
			Dimension Name	Identifier	Name of the dimension being spawned into.
			Hashed seed	Long	First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
			Game mode	Unsigned Byte	0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
			Previous Game mode	Byte	-1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
			Is Debug	Boolean	True if the world is a debug mode world; debug mode worlds cannot be modified and have predefined blocks.
			Is Flat	Boolean	True if the world is a superflat world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
			Has death location	Boolean	If true, then the next two fields are present.
			Death dimension name	Optional Identifier	Name of the dimension the player died in.
			Death location	Optional Position	The location that the player died at.
			Portal cooldown	VarInt	The number of ticks until the player can use the portal again.
			Enforces Secure Chat	Boolean

Respawn

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x47	Play	Client	Dimension Type	~~Identifier~~ VarInt	The ID of the type of dimension in the `minecraft:dimension_type` registry, defined by the Registry Data packet.
			Dimension Name	Identifier	Name of the dimension being spawned into.
			Hashed seed	Long	First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
			Game mode	Unsigned Byte	0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
			Previous Game mode	Byte	-1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
			Is Debug	Boolean	True if the world is a debug mode world; debug mode worlds cannot be modified and have predefined blocks.
			Is Flat	Boolean	True if the world is a superflat world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
			Has death location	Boolean	If true, then the next two fields are present.
			Death dimension Name	Optional Identifier	Name of the dimension the player died in.
			Death location	Optional Position	The location that the player died at.
			Portal cooldown	VarInt	The number of ticks until the player can use the portal again.
			Data kept	Byte	Bit mask. 0x01: Keep attributes, 0x02: Keep metadata. Tells which data should be kept on the client side once the player has respawned. In the Notchian implementation, this is context dependent: normal respawns (after death) keep no data; exiting the end poem/credits keeps the attributes; other dimension changes (portals or teleports) keep all data.

Store Cookie (play)

Stores some arbitrary data on the client, which persists between server transfers. The Notchian client only accepts cookies of up to 5 kiB in size.

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x6B	Play	Client	Key	Identifier	The identifier of the cookie.
			Payload Length	VarInt	Length of the following byte array.
			Payload	Byte Array (5120)	The data of the cookie.

Transfer (play)

Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x73	Play	Client	Host		String		The hostname of IP of the server.
0x73	Play	Client	Port		VarInt		The port of the server.

Update Attributes

Sets attributes on the given entity.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x71	Play	Client	Entity ID		VarInt
			Number Of Properties		VarInt		Number of elements in the following array.
			Property	~~Key~~ Id	Array	~~Identifier~~ VarInt Enum	See below.
				Value		Double	See below.
				Number Of Modifiers		VarInt	Number of elements in the following array.
				Modifiers		Array of Modifier Data	See Attribute#Modifiers. Modifier Data defined below.

Known Key values (see also Attribute#Modifiers):

These changed between 24w03b and 24w13a, TODO: Update this

Id	Key	Default	Min	Max	Label
0	generic.armor	0.0	0.0	30.0	Armor.
1	generic.armor_toughness	0.0	0.0	20.0	Armor Toughness.
2	generic.attack_damage	2.0	0.0	2048.0	Attack Damage.
3	generic.attack_knockback	0.0	0.0	5.0	Attack Knockback.
4	generic.attack_speed	4.0	0.0	1024.0	Attack Speed.
5	generic.block_interaction_range	4.5	0.0	64.0	Block Interaction Range.
6	generic.entity_interaction_range	3.0	0.0	64.0	Entity Interaction Range.
7	generic.flying_speed	0.4	0.0	1024.0	Flying Speed.
8	generic.follow_range	32.0	0.0	2048.0	Follow Range.
9	horse.jump_strength	0.7	0.0	2.0	Jump Strength.
10	generic.knockback_resistance	0.0	0.0	1.0	Knockback Resistance.
11	generic.luck	0.0	-1024.0	1024.0	Luck.
12	generic.max_absorption	0.0	0.0	2048.0	Max Absorption.
13	generic.max_health	20.0	1.0	1024.0	Max Health.
14	generic.movement_speed	0.7	0.0	1024.0	Movement Speed.
15	generic.scale	1.0	0.0625	16.0	Scale.
16	zombie.spawn_reinforcements	0.0	0.0	1.0	Spawn Reinforcements Chance.
17	generic.step_height	0.6	0.0	10.0	Step Height.

Modifier Data structure:

Field Name	Field Type	Notes
UUID	UUID
Amount	Double	May be positive or negative.
Operation	Byte	See below.

The operation controls how the base value of the modifier is changed.

0: Add/subtract amount
1: Add/subtract amount percent of the current value
2: Multiply by amount percent

All of the 0's are applied first, and then the 1's, and then the 2's.

Entity Effect

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x72	Play	Client	Entity ID	VarInt
			Effect ID	VarInt	See this table.
			Amplifier	Byte	Notchian client displays effect level as Amplifier + 1.
			Duration	VarInt	Duration in ticks. (-1 for infinite)
			Flags	Byte	Bit field, see below.
			Has Factor Data	Boolean	Used in DARKNESS effect
			Factor Codec	NBT Tag	See below

	The following information needs to be added to this page:
	What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?

Within flags:

0x01: Is ambient - was the effect spawned from a beacon? All beacon-generated effects are ambient. Ambient effects use a different icon in the HUD (blue border rather than gray). If all effects on an entity are ambient, the "Is potion effect ambient" living metadata field should be set to true. Usually should not be enabled.
0x02: Show particles - should all particles from this effect be hidden? Effects with particles hidden are not included in the calculation of the effect color, and are not rendered on the HUD (but are still rendered within the inventory). Usually should be enabled.
0x04: Show icon - should the icon be displayed on the client? Usually should be enabled.
0x08: Blend - should the effect's hard-coded blending be applied? Currently only used in the DARKNESS effect to apply extra void fog and adjust the gamma value for lighting.

~~Factor Data~~

Name	Type	Notes
padding_duration	TAG_INT
factor_start	TAG_FLOAT
factor_target	TAG_FLOAT
factor_current	TAG_FLOAT
effect_changed_timestamp	TAG_INT
factor_previous_frame	TAG_FLOAT
had_effect_last_tick	TAG_BOOLEAN

Serverbound

Chat Command

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x04	Play	Server	Command		String (256)		The command typed by the client.
			Timestamp		Long		The timestamp that the command was executed.
			Salt		Long		The salt for the following argument signatures.
			Array length		VarInt		Number of entries in the following array. The maximum length in Notchian server is 8.
			Array of argument signatures	Argument name	Array (8)	String (16)	The name of the argument that is signed by the following signature.
			Array of argument signatures	Signature	Array (8)	Byte Array (256)	The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
			Message Count		VarInt
			Acknowledged		Fixed BitSet (20)

Signed Chat Command

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x05	Play	Server	Command		String(256)		The command typed by the client.
			Timestamp		Long		The timestamp that the command was executed. Milliseconds since the Unix epoch.
			Salt		Long		The salt for the following argument signatures.
			Argument Signature Count		VarInt		Number of elements in the following array. The maximum length in Notchian server is 8.
			Argument Signatures	Name	Array	String(16)	The name of the argument that is signed by the following signature.
			Argument Signatures	Signature	Array	ByteArray(256)	The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
			Seen Messages Offset		VarInt
			Seen Messages Acknowledged		Fixed BitSet(20)

Cookie Response (play)

Response to a Cookie Request (play) from the server. The Notchian server only accepts responses of up to 5 kiB in size.

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x11	Play	Server	Key	Identifier	The identifier of the cookie.
			Has Payload	Boolean	The payload is only present if the cookie exists on the client.
			Payload Length	Optional VarInt	Length of the following byte array.
			Payload	Optional Byte Array (5120)	The data of the cookie, if any.

Debug Sample Subscription

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x13	Play	Server	Sample Type	VarInt Enum	The type of debug sample to subscribe to. Currently always 0 (TICK_TIME).

@@ Line 1: / Line 1: @@
-This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently 1.7.4, protocol 4) to the current pre-release. Note that this page contains bleeding-edge information that may not be completely or correctly documented.
+This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.4, protocol 765]]) to the current pre-release (currently [[Protocol version numbers|24w13a, protocol {{Snapshot PVN|1073742006}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
-He who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occured to the respective packets there.
-== Protocol History ==
+One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
-=== 14w18a ===
+== Contents ==
-* Added 'INITIALIZE' action to World Border
-=== 14w17a ===
+<div style="float:right;">__TOC__</div>
-* Increased the max payload size of 'Plugin Message' from 32767 to 1048576
-* Added new packet 'World Border'
-=== 14w11a ===
+=== Data types ===
-* UUIDs now include the '-'s
-=== 14w08a ===
+No changes so far.
-* Added new field 'Type' to Scoreboard Objective
-=== 14w07a ===
+=== Packets ===
-* Added two new fields to Teams
-=== 14w06a ===
-==== Clientbound ====
-* Added new field 'Hide Particles' to Entity Effect
-==== Serverbound ====
-* Removed 'HeadY' from Player Position
-* Removed 'HeadY' from Player Position And Look
-=== 14w05a ===
-==== Clientbound ====
-* New packet 'Camera'
-=== 14w04b ===
-* Spawn Painting now uses the 'Position' data type
-* Changed Spawn Painting's Direction type to Unsigned Byte
-=== 14w04a ===
-* Encoding for 'Position' changed
-==== Clientbound ====
-* Changed Entity Equipment's EntityId type to VarInt
-* Changed Update Health's Food type to VarInt
-* Changed Use Bed's EntityId type to VarInt
-* Added new fields to Spawn Player
-* Changed Collect Item's EntityId(s) types to VarInt
-* Changed Entity Velocity's EntityId type to VarInt
-* Changed Destroy Entities' Length type to VarInt
-* Changed Destroy Entities' EntityIds type to VarInt array
-* Changed Entity's EntityId type to VarInt
-* Changed Entity Relative Move's EntityId type to VarInt
-* Changed Entity Look's EntityId type to VarInt
-* Changed Entity Look and Relative Move's EntityId type to VarInt
-* Changed Entity Teleport's EntityId type to VarInt
-* Changed Entity Head Look's EntityId type to VarInt
-* Changed Entity Metadata's EntityId type to Varint
-* Changed Entity Effect's EntityId type to VarInt
-* Changed Entity Effect's Duration type to VarInt
-* Changed Remove Entity Effect's EntityId type to VarInt
-* Changed Set Experience's Level type to VarInt
-* Changed Set Experience's Total Experience type to VarInt
-* Changed Entity Properties's EntityId type to VarInt
-* Changed Entity Properties's List Length type to VarInt
-* Changed Player List Item's Ping type to VarInt
-* Changed Update Score's Value type to VarInt
-* Changed Teams' Player count type to VarInt
-* New packet 'Combat Event'
-==== Serverbound ====
-* Changed Keep Alive's Keep Alive ID type to VarInt
-* Changed Use Entity's Target type to VarInt
-* Changed Use Entity's Mouse type to Unsigned Byte
-* Removed everything from Animation
-* Changed Entity Action's EntityId type to VarInt
-* Changed Entity Action's Action ID type to Unsigned Byte
-* Changed Entity Action's Values
-* Changed Entity Action's Jump Boast type to VarInt
-* Merged Steer Vehicle's Jump and Unmount into a Bit Field
-* Changed Client Status's Action ID type to Unsigned Byte
-=== 14w03a ===
-* New data type 'Position'
-==== Clientbound ====
-* Spawn Position now uses the 'Position' data type
-* Use Bed now uses the 'Position' data type
-* Block Change now uses the 'Position' data type
-* Block Action now uses the 'Position' data type
-* Block Break Animation now uses the 'Position' data type
-* Effect now uses the 'Position' data type
-* Sign Update now uses the 'Position' data type
-* Update Block Entity now uses the 'Position' data type
-* Sign Editor Open nows uses the 'Position' data type
-==== Serverbound ====
-* Player Digging now uses the 'Position' data type
-* Player Block Placement now uses the 'Position' data type
-* Update Sign now uses the 'Position' data type
-* Client Settings 'show cape' type changed from boolean to unsigned byte
-=== 14w02a ===
-* Added 'Position' to Chat Message Clientbound
-* Remove Player Position And Look's 'OnGround' clientbound
-* Added 'Flags' to Player Position And Look clientbound
-* Changed Open Inventory's 'Inventory Type' type from byte to string
-* Added Server Difficulty
-* Removed Client Settings' 'Difficulty'
-== Protocol Version ==
 {| class="wikitable"
-! Version !! Protocol
+ ! ID
-|-
+ ! Packet name
-| 14w02a || 5
+ !colspan="2"| Documentation
-|-
+ |-
-| 14w03a || 6
+ !colspan="4"| Handshake serverbound
-|-
+ {{PacketList|0x00|Handshake}}
-| 14w04a || 7
+ |-
-|-
+ !colspan="4"| Login clientbound
-| 14w04b || 8
+ {{PacketList|0x01|Encryption Request}}
-|-
+ {{PacketList|0x05|Cookie Request (login)|rel=added}}
-| 14w05a || 9
+ |-
-|-
+ !colspan="4"| Login serverbound
-| 14w06a || 10
+ {{PacketList|0x04|Cookie Response (login)|rel=added}}
-|-
+ |-
-| 14w07a || 11
+ !colspan="4"| Configuration clientbound
-|-
+ {{PacketList|0x00|Cookie Request (configuration)|rel=added}}
-| 14w08a || 12
+ {{PacketList|{{change|0x00|0x01}}|Clientbound Plugin Message (configuration)|pre=unchanged}}
-|-
+ {{PacketList|{{change|0x01|0x02}}|Disconnect (configuration)|pre=unchanged}}
-| 14w11a || 14
+ {{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
-|-
+ {{PacketList|{{change|0x03|0x04}}|Clientbound Keep Alive (configuration)|pre=unchanged}}
-| 14w17a || 15
+ {{PacketList|{{change|0x04|0x05}}|Ping (configuration)|pre=unchanged}}
-|-
+ {{PacketList|0x06|Reset Chat|rel=added}}
-| 14w18a || 16
+ {{PacketList|{{change|0x05|0x07}}|Registry Data}}
-|}
+ {{PacketList|{{change|0x06|0x08}}|Remove Resource Pack (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x07|0x09}}|Add Resource Pack (configuration)|pre=unchanged}}
+ {{PacketList|0x0A|Store Cookie (configuration)|rel=added}}
+ {{PacketList|0x0B|Transfer (configuration)|rel=added}}
+ {{PacketList|{{change|0x08|0x0C}}|Feature Flags|pre=unchanged}}
+ {{PacketList|{{change|0x09|0x0D}}|Update Tags (configuration)|pre=unchanged}}
+ {{PacketList|0x0E|Clientbound Known Packs|rel=added}}
+ |-
+ !colspan="4"| Configuration serverbound
+ {{PacketList|0x01|Cookie Response (configuration)|rel=added}}
+ {{PacketList|{{change|0x01|0x02}}|Serverbound Plugin Message (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
+ {{PacketList|{{change|0x03|0x04}}|Serverbound Keep Alive (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x04|0x05}}|Pong (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x05|0x06}}|Resource Pack Response (configuration)|pre=unchanged}}
+ {{PacketList|0x07|Serverbound Known Packs|rel=added}}
+ |-
+ !colspan="4"| Play clientbound
+ {{PacketList|0x16|Cookie Request (Play)|rel=added}}
+ {{PacketList|{{change|0x16|0x17}}|Set Cooldown|pre=unchanged}}
+ {{PacketList|{{change|0x17|0x18}}|Chat Suggestions|pre=unchanged}}
+ {{PacketList|{{change|0x18|0x19}}|Clientbound Plugin Message (play)|pre=unchanged}}
+ {{PacketList|{{change|0x19|0x1A}}|Damage Event|pre=unchanged}}
+ {{PacketList|0x1B|Debug Sample|rel=added}}
+ {{PacketList|{{change|0x1A|0x1C}}|Delete Message|pre=unchanged}}
+ {{PacketList|{{change|0x1B|0x1D}}|Disconnect (play)|pre=unchanged}}
+ {{PacketList|{{change|0x1C|0x1E}}|Disguised Chat Message|pre=unchanged}}
+ {{PacketList|{{change|0x1D|0x1F}}|Entity Event|pre=unchanged}}
+ {{PacketList|{{change|0x1E|0x20}}|Explosion|pre=unchanged}}
+ {{PacketList|{{change|0x1F|0x21}}|Unload Chunk|pre=unchanged}}
+ {{PacketList|{{change|0x20|0x22}}|Game Event|pre=unchanged}}
+ {{PacketList|{{change|0x21|0x23}}|Open Horse Screen|pre=unchanged}}
+ {{PacketList|{{change|0x22|0x24}}|Hurt Animation|pre=unchanged}}
+ {{PacketList|{{change|0x23|0x25}}|Initialize World Border|pre=unchanged}}
+ {{PacketList|{{change|0x24|0x26}}|Clientbound Keep Alive (play)|pre=unchanged}}
+ {{PacketList|{{change|0x25|0x27}}|Chunk Data and Update Light|pre=unchanged}}
+ {{PacketList|{{change|0x26|0x28}}|World Event|pre=unchanged}}
+ {{PacketList|{{change|0x27|0x29}}|Particle|pre=unchanged}}
+ {{PacketList|{{change|0x28|0x2A}}|Update Light|pre=unchanged}}
+ {{PacketList|{{change|0x29|0x2B}}|Login (play)}}
+ {{PacketList|{{change|0x2A|0x2C}}|Map Data|pre=unchanged}}
+ {{PacketList|{{change|0x2B|0x2D}}|Merchant Offers|pre=unchanged}}
+ {{PacketList|{{change|0x2C|0x2E}}|Update Entity Position|pre=unchanged}}
+ {{PacketList|{{change|0x2D|0x2F}}|Update Entity Position and Rotation|pre=unchanged}}
+ {{PacketList|{{change|0x2E|0x30}}|Update Entity Rotation|pre=unchanged}}
+ {{PacketList|{{change|0x2F|0x31}}|Move Vehicle|pre=unchanged}}
+ {{PacketList|{{change|0x30|0x32}}|Open Book|pre=unchanged}}
+ {{PacketList|{{change|0x31|0x33}}|Open Screen|pre=unchanged}}
+ {{PacketList|{{change|0x32|0x34}}|Open Sign Editor|pre=unchanged}}
+ {{PacketList|{{change|0x33|0x35}}|Ping (play)|pre=unchanged}}
+ {{PacketList|{{change|0x34|0x36}}|Ping Response (play)|pre=unchanged}}
+ {{PacketList|{{change|0x35|0x37}}|Place Ghost Recipe|pre=unchanged}}
+ {{PacketList|{{change|0x36|0x38}}|Player Abilities|pre=unchanged}}
+ {{PacketList|{{change|0x37|0x39}}|Player Chat Message|pre=unchanged}}
+ {{PacketList|{{change|0x38|0x3A}}|End Combat|pre=unchanged}}
+ {{PacketList|{{change|0x39|0x3B}}|Enter Combat|pre=unchanged}}
+ {{PacketList|{{change|0x3A|0x3C}}|Combat Death|pre=unchanged}}
+ {{PacketList|{{change|0x3B|0x3D}}|Player Info Remove|pre=unchanged}}
+ {{PacketList|{{change|0x3C|0x3E}}|Player Info Update|pre=unchanged}}
+ {{PacketList|{{change|0x3D|0x3F}}|Look At|pre=unchanged}}
+ {{PacketList|{{change|0x3E|0x40}}|Synchronize Player Position|pre=unchanged}}
+ {{PacketList|{{change|0x3F|0x41}}|Update Recipe Book|pre=unchanged}}
+ {{PacketList|{{change|0x40|0x42}}|Remove Entities|pre=unchanged}}
+ {{PacketList|{{change|0x41|0x43}}|Remove Entity Effect|pre=unchanged}}
+ {{PacketList|{{change|0x42|0x44}}|Reset Score|pre=unchanged}}
+ {{PacketList|{{change|0x43|0x45}}|Remove Resource Pack (play)|pre=unchanged}}
+ {{PacketList|{{change|0x44|0x46}}|Add Resource Pack (play)|pre=unchanged}}
+ {{PacketList|{{change|0x45|0x47}}|Respawn}}
+ {{PacketList|{{change|0x46|0x48}}|Set Head Rotation|pre=unchanged}}
+ {{PacketList|{{change|0x47|0x49}}|Update Section Blocks|pre=unchanged}}
+ {{PacketList|{{change|0x48|0x4A}}|Select Advancements Tab|pre=unchanged}}
+ {{PacketList|{{change|0x49|0x4B}}|Server Data|pre=unchanged}}
+ {{PacketList|{{change|0x4A|0x4C}}|Set Action Bar Text|pre=unchanged}}
+ {{PacketList|{{change|0x4B|0x4D}}|Set Border Center|pre=unchanged}}
+ {{PacketList|{{change|0x4C|0x4E}}|Set Border Lerp Size|pre=unchanged}}
+ {{PacketList|{{change|0x4D|0x4F}}|Set Border Size|pre=unchanged}}
+ {{PacketList|{{change|0x4E|0x50}}|Set Border Warning Delay|pre=unchanged}}
+ {{PacketList|{{change|0x4F|0x51}}|Set Border Warning Distance|pre=unchanged}}
+ {{PacketList|{{change|0x50|0x52}}|Set Camera|pre=unchanged}}
+ {{PacketList|{{change|0x51|0x53}}|Set Held Item|pre=unchanged}}
+ {{PacketList|{{change|0x52|0x54}}|Set Center Chunk|pre=unchanged}}
+ {{PacketList|{{change|0x53|0x55}}|Set Render Distance|pre=unchanged}}
+ {{PacketList|{{change|0x54|0x56}}|Set Default Spawn Position|pre=unchanged}}
+ {{PacketList|{{change|0x55|0x57}}|Display Objective|pre=unchanged}}
+ {{PacketList|{{change|0x56|0x58}}|Set Entity Metadata|pre=unchanged}}
+ {{PacketList|{{change|0x57|0x59}}|Link Entities|pre=unchanged}}
+ {{PacketList|{{change|0x58|0x5A}}|Set Entity Velocity|pre=unchanged}}
+ {{PacketList|{{change|0x59|0x5B}}|Set Equipment|pre=unchanged}}
+ {{PacketList|{{change|0x5A|0x5C}}|Set Experience|pre=unchanged}}
+ {{PacketList|{{change|0x5B|0x5D}}|Set Health|pre=unchanged}}
+ {{PacketList|{{change|0x5C|0x5E}}|Update Objectives|pre=unchanged}}
+ {{PacketList|{{change|0x5D|0x5F}}|Set Passengers|pre=unchanged}}
+ {{PacketList|{{change|0x5E|0x60}}|Update Teams|pre=unchanged}}
+ {{PacketList|{{change|0x5F|0x61}}|Update Score|pre=unchanged}}
+ {{PacketList|{{change|0x60|0x62}}|Set Simulation Distance|pre=unchanged}}
+ {{PacketList|{{change|0x61|0x63}}|Set Subtitle Text|pre=unchanged}}
+ {{PacketList|{{change|0x62|0x64}}|Update Time|pre=unchanged}}
+ {{PacketList|{{change|0x63|0x65}}|Set Title Text|pre=unchanged}}
+ {{PacketList|{{change|0x64|0x66}}|Set Title Animation Times|pre=unchanged}}
+ {{PacketList|{{change|0x65|0x67}}|Entity Sound Effect|pre=unchanged}}
+ {{PacketList|{{change|0x66|0x68}}|Sound Effect|pre=unchanged}}
+ {{PacketList|{{change|0x67|0x69}}|Start Configuration|pre=unchanged}}
+ {{PacketList|{{change|0x68|0x6A}}|Stop Sound|pre=unchanged}}
+ {{PacketList|0x6B|Store Cookie (Play)|rel=added}}
+ {{PacketList|{{change|0x69|0x6C}}|System Chat Message|pre=unchanged}}
+ {{PacketList|{{change|0x6A|0x6D}}|Set Tab List Header And Footer|pre=unchanged}}
+ {{PacketList|{{change|0x6B|0x6E}}|Tag Query Response|pre=unchanged}}
+ {{PacketList|{{change|0x6C|0x6F}}|Pickup Item|pre=unchanged}}
+ {{PacketList|{{change|0x6D|0x70}}|Teleport Entity|pre=unchanged}}
+ {{PacketList|{{change|0x6E|0x71}}|Set Ticking State|pre=unchanged}}
+ {{PacketList|{{change|0x6F|0x72}}|Step Tick|pre=unchanged}}
+ {{PacketList|0x73|Transfer (Play)|rel=added}}
+ {{PacketList|{{change|0x70|0x74}}|Update Advancements|pre=unchanged}}
+ {{PacketList|{{change|0x71|0x75}}|Update Attributes}}
+ {{PacketList|{{change|0x72|0x76}}|Entity Effect}}
+ {{PacketList|{{change|0x73|0x77}}|Update Recipes|pre=unchanged}}
+ {{PacketList|{{change|0x74|0x78}}|Update Tags (play)|pre=unchanged}}
+ |-
+ !colspan="4"| Play serverbound
+ {{PacketList|0x04|Chat Command}}
+ {{PacketList|0x05|Signed Chat Command|rel=added}}
+ {{PacketList|{{change|0x05|0x06}}|Chat Message|pre=unchanged}}
+ {{PacketList|{{change|0x06|0x07}}|Player Session|pre=unchanged}}
+ {{PacketList|{{change|0x07|0x08}}|Chunk Batch Received|pre=unchanged}}
+ {{PacketList|{{change|0x08|0x09}}|Client Status|pre=unchanged}}
+ {{PacketList|{{change|0x09|0x0A}}|Client Information (play)|pre=unchanged}}
+ {{PacketList|{{change|0x0A|0x0B}}|Command Suggestions Request|pre=unchanged}}
+ {{PacketList|{{change|0x0B|0x0C}}|Acknowledge Configuration|pre=unchanged}}
+ {{PacketList|{{change|0x0C|0x0D}}|Click Container Button|pre=unchanged}}
+ {{PacketList|{{change|0x0D|0x0E}}|Click Container|pre=unchanged}}
+ {{PacketList|{{change|0x0E|0x0F}}|Close Container|pre=unchanged}}
+ {{PacketList|{{change|0x0F|0x10}}|Change Container Slot State|pre=unchanged}}
+ {{PacketList|0x11|Cookie Response (play)|rel=added}}
+ {{PacketList|{{change|0x10|0x12}}|Serverbound Plugin Message (play)|pre=unchanged}}
+ {{PacketList|0x13|Debug Sample Subscription|rel=added}}
+ {{PacketList|{{change|0x11|0x14}}|Edit Book|pre=unchanged}}
+ {{PacketList|{{change|0x12|0x15}}|Query Entity Tag|pre=unchanged}}
+ {{PacketList|{{change|0x13|0x16}}|Interact|pre=unchanged}}
+ {{PacketList|{{change|0x14|0x17}}|Jigsaw Generate|pre=unchanged}}
+ {{PacketList|{{change|0x15|0x18}}|Serverbound Keep Alive (play)|pre=unchanged}}
+ {{PacketList|{{change|0x16|0x19}}|Lock Difficulty|pre=unchanged}}
+ {{PacketList|{{change|0x17|0x1A}}|Set Player Position|pre=unchanged}}
+ {{PacketList|{{change|0x18|0x1B}}|Set Player Position and Rotation|pre=unchanged}}
+ {{PacketList|{{change|0x19|0x1C}}|Set Player Rotation|pre=unchanged}}
+ {{PacketList|{{change|0x1A|0x1D}}|Set Player On Ground|pre=unchanged}}
+ {{PacketList|{{change|0x1B|0x1E}}|Move Vehicle|pre=unchanged}}
+ {{PacketList|{{change|0x1C|0x1F}}|Paddle Boat|pre=unchanged}}
+ {{PacketList|{{change|0x1D|0x20}}|Pick Item|pre=unchanged}}
+ {{PacketList|{{change|0x1E|0x21}}|Ping Request (play)|pre=unchanged}}
+ {{PacketList|{{change|0x1F|0x22}}|Place Recipe|pre=unchanged}}
+ {{PacketList|{{change|0x20|0x23}}|Player Abilities|pre=unchanged}}
+ {{PacketList|{{change|0x21|0x24}}|Player Action|pre=unchanged}}
+ {{PacketList|{{change|0x22|0x25}}|Player Command|pre=unchanged}}
+ {{PacketList|{{change|0x23|0x26}}|Player Input|pre=unchanged}}
+ {{PacketList|{{change|0x24|0x27}}|Pong (play)|pre=unchanged}}
+ {{PacketList|{{change|0x25|0x28}}|Change Recipe Book Settings|pre=unchanged}}
+ {{PacketList|{{change|0x26|0x29}}|Set Seen Recipe|pre=unchanged}}
+ {{PacketList|{{change|0x27|0x2A}}|Rename Item|pre=unchanged}}
+ {{PacketList|{{change|0x28|0x2B}}|Resource Pack Response (play)|pre=unchanged}}
+ {{PacketList|{{change|0x29|0x2C}}|Seen Advancements|pre=unchanged}}
+ {{PacketList|{{change|0x2A|0x2D}}|Select Trade|pre=unchanged}}
+ {{PacketList|{{change|0x2B|0x2E}}|Set Beacon Effect|pre=unchanged}}
+ {{PacketList|{{change|0x2C|0x2F}}|Set Held Item|pre=unchanged}}
+ {{PacketList|{{change|0x2D|0x30}}|Program Command Block|pre=unchanged}}
+ {{PacketList|{{change|0x2E|0x31}}|Program Command Block Minecart|pre=unchanged}}
+ {{PacketList|{{change|0x2F|0x32}}|Set Creative Mode Slot|pre=unchanged}}
+ {{PacketList|{{change|0x30|0x33}}|Program Jigsaw Block|pre=unchanged}}
+ {{PacketList|{{change|0x31|0x34}}|Program Structure Block|pre=unchanged}}
+ {{PacketList|{{change|0x32|0x35}}|Update Sign|pre=unchanged}}
+ {{PacketList|{{change|0x33|0x36}}|Swing Arm|pre=unchanged}}
+ {{PacketList|{{change|0x34|0x37}}|Teleport To Entity|pre=unchanged}}
+ {{PacketList|{{change|0x35|0x38}}|Use Item On|pre=unchanged}}
+ {{PacketList|{{change|0x36|0x39}}|Use Item|pre=unchanged}}
+ |}
-== New data types ==
+== New/modified data types ==
-=== Position ===
+No changes so far.
-Encoded as followed:
+== Entity Metadata ==
-  (x & 0x3FFFFFF) << 38 | (y & 0xFFF) << 26 | (z & 0x3FFFFFF)
+{{#vardefine: meta_prerelease | 1}}
-And decoded as:
+{{Metadata type definition/begin}}
+ ! Value
+ ! Notes
+{{Metadata type definition|Byte}}
+ | {{Type|Byte}}
+ |
+{{Metadata type definition|VarInt}}
+ | {{Type|VarInt}}
+ |
+{{Metadata type definition|VarLong}}
+ | {{Type|VarLong}}
+ |
+{{Metadata type definition|Float}}
+ | {{Type|Float}}
+ |
+{{Metadata type definition|String}}
+ | {{Type|String}}
+ |
+{{Metadata type definition|Text Component}}
+ | {{Type|Text Component}}
+ |
+{{Metadata type definition|Optional Text Component}}
+ | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Text Component}})
+ | Text Component is present if the Boolean is set to true.
+{{Metadata type definition|Slot}}
+ | {{Type|Slot}}
+ |
+{{Metadata type definition|Boolean}}
+ | {{Type|Boolean}}
+ |
+{{Metadata type definition|Rotations}}
+ | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
+ | rotation on x, rotation on y, rotation on z
+{{Metadata type definition|Position}}
+ | {{Type|Position}}
+ |
+{{Metadata type definition|Optional Position}}
+ | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Position}})
+ | Position is present if the Boolean is set to true.
+{{Metadata type definition|Direction}}
+ | {{Type|VarInt}} {{Type|Enum}}
+ | Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5
+{{Metadata type definition|Optional UUID}}
+ | ({{Type|Boolean}}, {{Type|Optional}} {{Type|UUID}})
+ | UUID is present if the Boolean is set to true.
+{{Metadata type definition|Block State}}
+ | {{Type|VarInt}}
+ | An ID in the block state registry.
+{{Metadata type definition|Optional Block State}}
+ | {{Type|VarInt}}
+ | 0 for absent (air is unrepresentable); otherwise, an ID in the block state registry.
+{{Metadata type definition|NBT}}
+ | {{Type|NBT}}
+ |
+{{Metadata type definition|Particle}}
+ | ({{Type|VarInt}}, Varies)
+ | particle type (an ID in the <code>minecraft:particle_type</code> registry), particle data (See [[Particles]].)
+{{Metadata type definition|Particles|rel=added}}
+ | ({{Type|VarInt}}, Array of Particle)
+ | length of array, particle data (See directly above.)
+{{Metadata type definition|Villager Data}}
+ | ({{Type|VarInt}}, {{Type|VarInt}}, {{Type|VarInt}})
+ | villager type, villager profession, level (See below.)
+{{Metadata type definition|Optional VarInt}}
+ | {{Type|VarInt}}
+ | 0 for absent; 1 + actual value otherwise. Used for entity IDs.
+{{Metadata type definition|Pose}}
+ | {{Type|VarInt}} {{Type|Enum}}
+ | STANDING = 0, FALL_FLYING = 1, SLEEPING = 2, SWIMMING = 3, SPIN_ATTACK = 4, SNEAKING = 5, LONG_JUMPING = 6, DYING = 7, CROAKING = 8, USING_TONGUE = 9, SITTING = 10, ROARING = 11, SNIFFING = 12, EMERGING = 13, DIGGING = 14{{change||2=, SLIDING = 15, SHOOTING = 16, INHALING = 17}}
+{{Metadata type definition|Cat Variant}}
+ | {{Type|VarInt}}
+ | An ID in the <code>minecraft:cat_variant</code> registry.
+{{Metadata type definition|Wolf Variant|rel=added}}
+ | {{Type|VarInt}}
+ | An ID in the <code>minecraft:wolf_variant</code> registry.
+{{Metadata type definition|Frog Variant}}
+ | {{Type|VarInt}}
+ | An ID in the <code>minecraft:frog_variant</code> registry.
+{{Metadata type definition|Optional Global Position}}
+ | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Identifier}}, {{Type|Optional}} {{Type|Position}})
+ | dimension identifier, position; only if the Boolean is set to true.
+{{Metadata type definition|Painting Variant}}
+ | {{Type|VarInt}}
+ | An ID in the <code>minecraft:painting_variant</code> registry.
+{{Metadata type definition|Sniffer State}}
+ | {{Type|VarInt}} {{Type|Enum}}
+ | IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
+{{Metadata type definition|Armadillo State|rel=added}}
+ | {{Type|VarInt}} {{Type|Enum}}
+ | IDLE = 0, ROLLING = 1, SCARED = 2
+{{Metadata type definition|Vector3}}
+ | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
+ | x, y, z
+{{Metadata type definition|Quaternion}}
+ | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}}, {{Type|Float}})
+ | x, y, z, w
+ |}
-  long val; // Encoded value
+=== Living Entity ===
-  x = val >> 38;
-  y = val << 26 >> 52
-  z = val << 38 >> 38
-== Play ==
+TODO: This has changed to use the PARTICLES attribute
-=== Clientbound ===
+=== Wolf ===
-==== Chat Message ====
+{{Metadata inherit|Wolf|inherits=Tameable Animal}}
-Identifying the difference between Chat/System Message is important as it helps respect the user's chat visibility options. While position 2 accepts json formatting it will not display, old style formatting works
 {| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
+ ! Index
-|-
+ ! Type
-| rowspan=2 | 0x02
+ !style="width: 250px;" colspan="2"| Meaning
-| JSON Data || String || https://gist.github.com/thinkofdeath/e882ce057ed83bac0a1c , Limited to 32767 bytes
+ ! Default
-|-
+ |- {{added}}
-| Position || Byte || 0 - Chat (chat box) ,1 - System Message (chat box), 2 - Above action bar
+ | {{Metadata id|}}
-|}
+ | {{Metadata type|Wolf Variant}}
-{{Warning|Malformed JSON will disconnect the client}}
+ |colspan="2"| Wolf Variant
+ | PALE
+ |-
+ | {{Metadata id|}}
+ | {{Metadata type|Boolean}}
+ |colspan="2"| Is begging
+ | false
+ |-
+ | {{Metadata id|}}
+ | {{Metadata type|VarInt}}
+ |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
+ | 14 (Red)
+ |-
+ | {{Metadata id|}}
+ | {{Metadata type|VarInt}}
+ |colspan="2"| Anger time
+ | 0
+ |}
-==== Entity Equipment ====
+=== Armadillo ===
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=3 | 0x04
-| EntityID || VarInt || Entity's ID
-|-
-| Slot || Short || Equipment slot: 0=held, 1-4=armor slot (1 - boots, 2 - leggings, 3 - chestplate, 4 - helmet)
-|-
-| Item || [[Slot_Data|Slot]] || Item in slot format
-|}
-==== Spawn Position ====
+{{Metadata inherit|Armadillo|inherits=Animal|start_at=17}}
+{| class="wikitable" {{added}}
+ ! Index
+ ! Type
+ !style="width: 250px;" colspan="2"| Meaning
+ ! Default
+ |-
+ | {{Metadata id|added}}
+ | {{Metadata type|Armadillo State}}
+ |colspan="2"| Armadillo State
+ | IDLE
+ |}
-Sent by the server after login to specify the coordinates of the spawn point (the point at which players spawn at, and which the compass points to). It can be sent at any time to update the point compasses point at.
+== Block Actions ==
-{| class="wikitable"
+No changes so far.
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=1 | 0x05
-| Location || Position || Spawn location
-|}
-==== Update Health ====
+== Inventories ==
-Sent by the server to update/set the health of the player it is sent to.
+No changes so far.
-Food saturation acts as a food "overcharge". Food values will not decrease while the saturation is over zero. Players logging in automatically get a saturation of 5.0. Eating food increases the saturation as well as the food bar.
+== Plugin Channels ==
-{| class="wikitable"
+No changes so far.
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=3 | 0x06
-| Health || Float || 0 or less = dead, 20 = full HP
-|-
-| Food || VarInt || 0 - 20
-|-
-| Food Saturation || Float || Seems to vary from 0.0 to 5.0 in integer increments
-|}
+== Handshake ==
-==== Player Position And Look ====
+=== Serverbound ===
-Updates the players position on the server.
-If the distance between the last known position of the player on the server and the new position set by this packet is greater than 100 units will result in the client being kicked for "You moved too quickly :( (Hacking?)"
-Also if the fixed-point number of X or Z is set greater than <code>3.2E7D</code> the client will be kicked for "Illegal position"
-Yaw is measured in degrees, and does not follow classical trigonometry rules. The unit circle of yaw on the XZ-plane starts at (0, 1) and turns counterclockwise, with 90 at (-1, 0), 180 at (0,-1) and 270 at (1, 0). Additionally, yaw is not clamped to between 0 and 360 degrees; any number is valid, including negative numbers and numbers greater than 360.
+==== Handshake ====
-Pitch is measured in degrees, where 0 is looking straight ahead, -90 is looking straight up, and 90 is looking straight down.
+This causes the server to switch into the target state.
-The yaw of player (in degrees), standing at point (x0,z0) and looking towards point (x,z) one can be calculated with:
-  l = x-x0
-  w = z-z0
-  c = sqrt( l*l + w*w )
-  alpha1 = -arcsin(l/c)/PI*180
-  alpha2 =  arccos(w/c)/PI*180
-  if alpha2 > 90 then
-    yaw = 180 - alpha1
-  else
-    yaw = alpha1
-You can get a unit vector from a given yaw/pitch via:
-  x = -cos(pitch) * sin(yaw)
-  y = -sin(pitch)
-  z =  cos(pitch) * cos(yaw)
-About the flags field:
-  <Dinnerbone> It's a bitfield, X/Y/Z/Y_ROT/X_ROT. If X is set, the x value is relative and not absolute.
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=6| 0x08
-| X || Double || Absolute/Relative position
-|-
-| Y || Double || Absolute/Relative position
-|-
-| Z || Double || Absolute/Relative position
-|-
-| Yaw || Float || Absolute/Relative rotation on the X Axis, in degrees
-|-
-| Pitch || Float || Absolute/Relative rotation on the Y Axis, in degrees
-|-
-| Flags || Byte ||
 {| class="wikitable"
-| X || 0x01
+ ! Packet ID
-|-
+ ! State
-| Y || 0x02
+ ! Bound To
-|-
+ ! Field Name
-| Z || 0x04
+ ! Field Type
-|-
+ ! Notes
-| Y_ROT || 0x08
+ |-
-|-
+ | rowspan="4"| 0x00
-| X_ROT || 0x10
+ | rowspan="4"| Handshaking
-|}
+ | rowspan="4"| Server
-|}
+ | Protocol Version
+ | [[#Definitions:varint|VarInt]]
+ | See [[protocol version numbers]] (currently 765 in Minecraft 1.20.4).
+ |-
+ | Server Address
+ | [[#Definitions:string|String]] (255)
+ | Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect. The Notchian server does not use this information. Note that SRV records are a simple redirect, e.g. if _minecraft._tcp.example.com points to mc.example.org, users connecting to example.com will provide example.org as server address in addition to connecting to it.
+ |-
+ | Server Port
+ | [[#Definitions:unsigned-short|Unsigned Short]]
+ | Default is 25565. The Notchian server does not use this information.
+ |-
+ | Next State
+ | [[#Definitions:varint|VarInt]] [[#Definitions:enum|Enum]]
+ | 1 for [[#Status|Status]], 2 for [[#Login|Login]]{{change||, 3 for [[#Login|Transfer]]}}.
+ |}
-==== Use Bed ====
+== Status ==
-This packet tells that a player goes to bed.
+=== Clientbound ===
-The client with the matching  Entity ID will go into bed mode.
+No changes so far.
-This Packet is sent to all nearby players including the one sent to bed.
+=== Serverbound ===
-{| class="wikitable"
+No changes so far.
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=2 | 0x0A
-| Entity ID || VarInt || Player ID
-|-
-| Location || Position || Block location of the head part of the bed
-|}
-==== Collect Item ====
+== Login ==
-Sent by the server when someone picks up an item lying on the ground - its sole purpose appears to be the animation of the item flying towards you. It doesn't destroy the entity in the client memory, and it doesn't add it to your inventory. The server only checks for items to be picked up after each Player Position and [Player Position & Look packet sent by the client.
+=== Clientbound ===
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=2 | 0x0D
-| Collected Entity ID || VarInt ||
-|-
-| Collector Entity ID || VarInt ||
-|}
-==== Spawn Painting ====
-This packet shows location, name, and type of painting.
-Calculating the center of an image: given a (width x height) grid of cells, with (0, 0) being the top left corner, the center is (max(0, width / 2 - 1), height / 2). E.g.
-x1 (1, 0)
-x4 (1, 2)
+==== Encryption Request ====
 {| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
+ ! Packet ID
-|-
+ ! State
-| rowspan=6 | 0x10
+ ! Bound To
-| Entity ID || VarInt || Entity's ID
+ ! Field Name
-|-
+ ! Field Type
-| Title || String || Name of the painting. Max length 13
+ ! Notes
-|-
+ |-
-| Location || Position || Center coordinates
+ | rowspan="6"| 0x01
-|-
+ | rowspan="6"| Login
-| Direction || Unsigned Byte || Direction the painting faces (0 -z, 1 -x, 2 +z, 3 +x)
+ | rowspan="6"| Client
-|}
+ | Server ID
+ | {{Type|String}} (20)
+ | Appears to be empty.
+ |-
+ | Public Key Length
+ | {{Type|VarInt}}
+ | Length of Public Key.
+ |-
+ | Public Key
+ | {{Type|Byte Array}}
+ | The server's public key, in bytes.
+ |-
+ | Verify Token Length
+ | {{Type|VarInt}}
+ | Length of Verify Token. Always 4 for Notchian servers.
+ |-
+ | Verify Token
+ | {{Type|Byte Array}}
+ | A sequence of random bytes generated by the server.
+ |- {{added}}
+ | Should Authenticate
+ | {{Type|Boolean}}
+ |
+ |}
+==== Cookie Request (login) ====
-==== Entity Velocity ====
+Requests a cookie that was previously stored.
-Velocity is believed to be in units of 1/8000 of a block per server tick (50ms);
+{| class="wikitable" {{added}}
-for example, -1343 would move (-1343 / 8000) = −0.167875 blocks per tick (or −3,3575 blocks per second).
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
+ |-
+ | rowspan="1"| 0x05
+ | rowspan="1"| Login
+ | rowspan="1"| Client
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+ | The identifier of the cookie.
+ |}
-{| class="wikitable"
+=== Serverbound ===
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=4 | 0x12
-| Entity ID || VarInt || Entity's ID
-|-
-| Velocity X || Short || Velocity on the X axis
-|-
-| Velocity Y || Short || Velocity on the Y axis
-|-
-| Velocity Z || Short || Velocity on the Z axis
-|}
-==== Destroy Entities ====
+==== Cookie Response (login) ====
-Sent by the server when an list of Entities is to be destroyed on the client.
+Response to a [[#Cookie_Request_(login)|Cookie Request (login)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
-{| class="wikitable"
+{| class="wikitable" {{added}}
-! Packet ID !! Field Name !! Field Type !! Notes
+ ! Packet ID
-|-
+ ! State
-| rowspan=2 | 0x13
+ ! Bound To
-| Count || VarInt || Length of following array
+ ! colspan="2"| Field Name
-|-
+ ! colspan="2"| Field Type
-| Entity IDs || Array of VarInt || The list of entities of destroy
+ ! Notes
-|}
+ |-
+ | rowspan="4"| 0x04
+ | rowspan="4"| Login
+ | rowspan="4"| Server
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+ | The identifier of the cookie.
+ |-
+ | colspan="2"| Has Payload
+ | colspan="2"| Boolean
+ | The payload is only present if the cookie exists on the client.
+ |-
+ | colspan="2"| Payload Length
+ | colspan="2"| VarInt
+ | Length of the following byte array.
+ |-
+ | colspan="2"| Payload
+ | colspan="2"| Optional Byte Array (5120)
+ | The data of the cookie, if any.
+ |}
-==== Entity ====
+== Configuration ==
-Most entity-related packets are subclasses of this packet. When sent from the server to the client, it may initialize the entry.
+=== Clientbound ===
-For player entities, either this packet or any move/look packet is sent every game tick.
+==== Cookie Request (configuration) ====
-So the meaning of this packet is basically that the entity did not move/look since the last such packet.
-{| class="wikitable"
+Requests a cookie that was previously stored.
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=1 | 0x14
-| Entity ID || VarInt || Entity's ID
-|}
-==== Entity Relative Move ====
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
+ |-
+ | rowspan="1"| 0x00
+ | rowspan="1"| Configuration
+ | rowspan="1"| Client
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+ | The identifier of the cookie.
+ |}
-This packet is sent by the server when an entity moves less then 4 blocks; if an entity moves more than 4 blocks Entity Teleport should be sent instead.
+==== Reset Chat ====
-This packet allows at most four blocks movement in any direction, because byte range is from -128 to 127.
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! Field Name
+ ! Field Type
+ ! Notes
+ |-
+ | 0x06
+ | Configuration
+ | Client
+ | colspan="3"| ''no fields''
+ |}
-{| class="wikitable"
+==== Registry Data ====
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=4| 0x15
-| Entity ID || VarInt || Entity's ID
-|-
-| DX || Byte || Change in X position as a [[Data_Types#Fixed-point_numbers|Fixed-Point number]]
-|-
-| DY || Byte || Change in Y position as a [[Data_Types#Fixed-point_numbers|Fixed-Point number]]
-|-
-| DZ || Byte || Change in Z position as a [[Data_Types#Fixed-point_numbers|Fixed-Point number]]
-|}
-==== Entity Look ====
+Represents certain registries that are sent from the server and are applied on the client. {{change||The packet is sent for each of the following registries: <code>minecraft:worldgen/biome</code>, <code>minecraft:chat_type</code>, <code>minecraft:trim_pattern</code>, <code>minecraft:trim_material</code>, <code>minecraft:wolf_variant</code>, <code>minecraft:dimension_type</code>, <code>minecraft:damage_type</code>, and <code>minecraft:banner_pattern</code>.}}
-This packet is sent by the server when an entity rotates.  Example: "Yaw" field 64 means a 90 degree turn.
 {| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
+ ! Packet ID
-|-
+ ! State
-| rowspan=3 | 0x16
+ ! Bound To
-| Entity ID || VarInt || Entity's ID
+ ! colspan="2"| Field Name
-|-
+ ! colspan="2"| Field Type
-| Yaw || Byte || The X Axis rotation as a fraction of 360
+ ! Notes
-|-
+ |-
-| Pitch || Byte || The Y Axis rotation as a fraction of 360
+ | rowspan="6"| 0x07
-|}
+ | rowspan="6"| Configuration
+ | rowspan="6"| Client
+ |{{removed}} colspan="2"| Registry Codec
+ |{{removed}} colspan="2"| {{Type|NBT}} (Compound)
+ |{{removed}}| See [[Registry Data]].
+ |- {{added}}
+ | colspan="2"| Registry ID
+ | colspan="2"| Identifier
+ |
+ |- {{added}}
+ | colspan="2"| Entry Count
+ | colspan="2"| VarInt
+ | Number of entries in the following array.
+ |- {{added}}
+ | rowspan="3"| Entries
+ | Entry ID
+ | rowspan="3"| Array
+ | Identifier
+ |
+ |- {{added}}
+ | Has Data
+ | Boolean
+ | Whether the entry has any data following.
+ |- {{added}}
+ | Data
+ | NBT Tag
+ | Entry data. Only present if Has Data is true.
+ |}
-==== Entity Look and Relative Move ====
+==== Store Cookie (configuration) ====
-This packet is sent by the server when an entity rotates and moves.
+Stores some arbitrary data on the client, which persists between server transfers. The Notchian client only accepts cookies of up to 5 kiB in size.
-Since a byte range is limited from -128 to 127, and movement is offset of fixed-point numbers,
-this packet allows at most four blocks movement in any direction. (-128/32 == -4)
-{| class="wikitable"
+{| class="wikitable" {{added}}
-! Packet ID !! Field Name !! Field Type !! Notes
+ ! Packet ID
-|-
+ ! State
-| rowspan=6 | 0x17
+ ! Bound To
-| Entity ID || VarInt || Entity's ID
+ ! colspan="2"| Field Name
-|-
+ ! colspan="2"| Field Type
-| DX || Byte || Change in X position as a [[Data_Types#Fixed-point_numbers|Fixed-Point number]]
+ ! Notes
-|-
+ |-
-| DY || Byte || Change in Y position as a [[Data_Types#Fixed-point_numbers|Fixed-Point number]]
+ | rowspan="2"| 0x0A
-|-
+ | rowspan="2"| Configuration
-| DZ || Byte || Change in Z position as a [[Data_Types#Fixed-point_numbers|Fixed-Point number]]
+ | rowspan="2"| Client
-|-
+ | colspan="2"| Key
-| Yaw || Byte || The X Axis rotation as a fraction of 360
+ | colspan="2"| Identifier
-|-
+ | The identifier of the cookie.
-| Pitch || Byte || The Y Axis rotation as a fraction of 360
+ |-
-|}
+ | colspan="2"| Payload
+ | colspan="2"| ByteArray(5120)
+ | The data of the cookie.
+ |}
-==== Entity Teleport ====
+==== Transfer (configuration) ====
-This packet is sent by the server when an entity moves more than 4 blocks.
+Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
-{| class="wikitable"
+{| class="wikitable" {{added}}
-! Packet ID !! Field Name !! Field Type !! Notes
+ ! Packet ID
-|-
+ ! State
-| rowspan=6 | 0x18
+ ! Bound To
-| Entity ID || VarInt || Entity's ID
+ ! colspan="2"| Field Name
-|-
+ ! colspan="2"| Field Type
-| X || Int || X position as a [[Data_Types#Fixed-point_numbers|Fixed-Point number]]
+ ! Notes
-|-
+ |-
-| Y || Int || Y position as a [[Data_Types#Fixed-point_numbers|Fixed-Point number]]
+ | rowspan="2"| 0x0B
-|-
+ | rowspan="2"| Configuration
-| Z || Int || Z position as a [[Data_Types#Fixed-point_numbers|Fixed-Point number]]
+ | rowspan="2"| Client
-|-
+ | colspan="2"| Host
-| Yaw || Byte || The X Axis rotation as a fraction of 360
+ | colspan="2"| String
-|-
+ | The hostname of IP of the server.
-| Pitch || Byte || The Y Axis rotation as a fraction of 360
+ |-
-|}
+ | colspan="2"| Port
+ | colspan="2"| VarInt
+ | The port of the server.
+ |}
-==== Entity Head Look ====
+==== Clientbound Known Packs ====
+Informs the client of which data packs are present on the server.
+The client is expected to respond with its own [[#Serverbound_Known_Packs|Serverbown Known Packs]] packet.
+The Notchian server does not continue with Configuration until it receives a response.
-Changes the direction an entity's head is facing.
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
+ |-
+ | rowspan="4"| 0x0E
+ | rowspan="4"| Configuration
+ | rowspan="4"| Client
+ | colspan="2"| Known Pack Count
+ | colspan="2"| VarInt
+ | The number of known packs in the following array.
+ |-
+ | rowspan="3"| Known Packs
+ | Namespace
+ | rowspan="3"| Array
+ | String
+ |
+ |-
+ | ID
+ | String
+ |
+ |-
+ | Version
+ | String
+ |
+ |}
-{| class="wikitable"
+=== Serverbound ===
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=2 | 0x19
-| Entity ID || VarInt || Entity's ID
-|-
-| Head Yaw || Byte || Head yaw in steps of 2p/256
-|}
-==== Entity Metadata ====
+==== Cookie Response (configuration) ====
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=2 | 0x1C
-| Entity ID || VarInt || Entity's ID
-|-
-| Metadata || [[Entities#Entity_Metadata_Format|Metadata]] ||
-|}
+Response to a [[#Cookie_Request_(configuration)|Cookie Request (configuration)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
-==== Entity Effect ====
+{| class="wikitable" {{added}}
-{| class="wikitable"
+ ! Packet ID
-! Packet ID !! Field Name !! Field Type !! Notes
+ ! State
-|-
+ ! Bound To
-| rowspan=5 | 0x1D
+ ! colspan="2"| Field Name
-| Entity ID || VarInt || Entity's ID
+ ! colspan="2"| Field Type
-|-
+ ! Notes
-| Effect ID || Byte || See [[http://www.minecraftwiki.net/wiki/Potion_effect#Parameters]]
+ |-
-|-
+ | rowspan="4"| 0x01
-| Amplifier || Byte ||
+ | rowspan="4"| Configuration
-|-
+ | rowspan="4"| Server
-| Duration || VarInt ||
+ | colspan="2"| Key
-|-
+ | colspan="2"| Identifier
-| Hide Particles || Boolean ||
+ | The identifier of the cookie.
-|}
+ |-
+ | colspan="2"| Has Payload
+ | colspan="2"| Boolean
+ | The payload is only present if the cookie exists on the client.
+ |-
+ | colspan="2"| Payload Length
+ | colspan="2"| VarInt
+ | Length of the following byte array.
+ |-
+ | colspan="2"| Payload
+ | colspan="2"| Optional Byte Array (5120)
+ | The data of the cookie, if any.
+ |}
-==== Remove Entity Effect ====
+==== Serverbound Known Packs ====
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=2 | 0x1E
-| Entity ID || VarInt || Entity's ID
-|-
-| Effect ID || Byte ||
-|}
-==== Set Experience ====
+ID 0x07, same structure as Clientbound Known Packs. If the client specifies a pack in this packet, the server should omit its contained data from Registry Data.
-Sent by the server when the client should change experience levels.
+== Play ==
-{| class="wikitable"
+=== Clientbound ===
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=3 | 0x1F
-| Experience bar || Float || Between 0 and 1
-|-
-| Level || VarInt ||
-|-
-| Total Experience || VarInt ||
-|}
-==== Entity Properties ====
+==== Cookie Request (play) ====
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=3 | 0x20
-| Entity ID || VarInt || Entity's ID
-|-
-| Count || Int || Length of following array
-|-
-| Properties || Array of Property Data ||
-|}
-'''Property Data''' structure:
+Requests a cookie that was previously stored.
-{| class="wikitable"
-|-
-! Field Name !! Field Type !! Notes
-|-
-| Key || String ||
-|-
-| Value || Double ||
-|-
-| List Length || VarInt || Number of list elements that follow.
-|-
-| Modifiers || Array of Modifier Data || http://www.minecraftwiki.net/wiki/Attribute#Modifiers
-|}
-Known key values:
+{| class="wikitable" {{added}}
-{| class="wikitable"
+ ! Packet ID
-|-
+ ! State
-! Key !! Default !! Min !! Max !! Label
+ ! Bound To
-|-
+ ! colspan="2"| Field Name
-| generic.maxHealth || 20.0 || 0.0 || Double.MaxValue || Max Health
+ ! colspan="2"| Field Type
-|-
+ ! Notes
-| generic.followRange || 32.0 || 0.0 || 2048.0 || Follow Range
+ |-
-|-
+ | rowspan="1"| 0x16
-| generic.knockbackResistance || 0.0 || 0.0 || 1.0 || Knockback Resistance
+ | rowspan="1"| Play
-|-
+ | rowspan="1"| Client
-| generic.movementSpeed || 0.699999988079071 || 0.0 || Double.MaxValue || Movement Speed
+ | colspan="2"| Key
-|-
+ | colspan="2"| Identifier
-| generic.attackDamage || 2.0 || 0.0 || Double.MaxValue ||
+ | The identifier of the cookie.
-|-
+ |}
-| horse.jumpStrength || 0.7 || 0.0 || 2.0 || Jump Strength
-|-
-| zombie.spawnReinforcements || 0.0 || 0.0 || 1.0 || Spawn Reinforcements Chance
-|}
-'''Modifier Data''' structure:
+==== Debug Sample ====
-{| class="wikitable"
-|-
-! Field Name !! Field Type !! Notes
-|-
-| UUID || 128-bit integer ||
-|-
-| Amount || Double ||
-|-
-| Operation || Byte ||
-|}
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! Field Name
+ ! Field Type
+ ! Notes
+ |-
+ | rowspan="3"| 0x1B
+ | rowspan="3"| Play
+ | rowspan="3"| Client
+ | Sample Length
+ | VarInt
+ | The length of the following array.
+ |-
+ | Sample
+ | Long Array
+ | TODO: What is the structure of the data in this array?
+ |-
+ | Sample Type
+ | VarInt Enum
+ | The type of sample data. Currently always 0 (TICK_TIME).
+ |}
+==== Login (play) ====
-==== Block Change ====
 {| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
+ ! Packet ID
-|-
+ ! State
-| rowspan=3 | 0x23
+ ! Bound To
-| Location || Position|| Block Coordinates
+ ! Field Name
-|-
+ ! Field Type
-| Block ID || VarInt || The new block ID for the block
+ ! Notes
-|-
+ |-
-| Block Metadata || Unsigned Byte || The new metadata for the block
+ | rowspan="22"| 0x2B
-|}
+ | rowspan="22"| Play
+ | rowspan="22"| Client
+ | Entity ID
+ | {{Type|Int}}
+ | The player's Entity ID (EID).
+ |-
+ | Is hardcore
+ | {{Type|Boolean}}
+ |
+ |-
+ | Dimension Count
+ | {{Type|VarInt}}
+ | Size of the following array.
+ |-
+ | Dimension Names
+ | {{Type|Array}} of {{Type|Identifier}}
+ | Identifiers for all dimensions on the server.
+ |-
+ | Max Players
+ | {{Type|VarInt}}
+ | Was once used by the client to draw the player list, but now is ignored.
+ |-
+ | View Distance
+ | {{Type|VarInt}}
+ | Render distance (2-32).
+ |-
+ | Simulation Distance
+ | {{Type|VarInt}}
+ | The distance that the client will process specific things, such as entities.
+ |-
+ | Reduced Debug Info
+ | {{Type|Boolean}}
+ | If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
+ |-
+ | Enable respawn screen
+ | {{Type|Boolean}}
+ | Set to false when the doImmediateRespawn gamerule is true.
+ |-
+ | Do limited crafting
+ | {{Type|Boolean}}
+ | Whether players can only craft recipes they have already unlocked. Currently unused by the client.
+ |-
+ | Dimension Type
+ | {{change|Identifier|VarInt}}
+ | The ID of the type of dimension in the <code>minecraft:dimension_type</code> registry, defined by the Registry Data packet.
+ |-
+ | Dimension Name
+ | {{Type|Identifier}}
+ | Name of the dimension being spawned into.
+ |-
+ | Hashed seed
+ | {{Type|Long}}
+ | First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
+ |-
+ | Game mode
+ | {{Type|Unsigned Byte}}
+ | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
+ |-
+ | Previous Game mode
+ | {{Type|Byte}}
+ | -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
+ |-
+ | Is Debug
+ | {{Type|Boolean}}
+ | True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
+ |-
+ | Is Flat
+ | {{Type|Boolean}}
+ | True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
+ |-
+ | Has death location
+ | {{Type|Boolean}}
+ | If true, then the next two fields are present.
+ |-
+ | Death dimension name
+ | {{Type|Optional}} {{Type|Identifier}}
+ | Name of the dimension the player died in.
+ |-
+ | Death location
+ | {{Type|Optional}} {{Type|Position}}
+ | The location that the player died at.
+ |-
+ | Portal cooldown
+ | {{Type|VarInt}}
+ | The number of ticks until the player can use the portal again.
+ |-
+ | Enforces Secure Chat
+ | {{Type|Boolean}}
+ |
+ |}
-==== Block Action ====
+==== Respawn ====
-This packet is used for a number of things:
-* <div class="li">Chests opening and closing
-* Pistons pushing and pulling
-* Note blocks playing
-See Also: [[Block Actions]]
 {| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
+ ! Packet ID
-|-
+ ! State
-| rowspan=4 | 0x24
+ ! Bound To
-| Location || Position || Block Coordinates
+ ! Field Name
-|-
+ ! Field Type
-| Byte 1 || Unsigned Byte || Varies depending on block - see [[Block_Actions]]
+ ! Notes
-|-
+ |-
-| Byte 2 || Unsigned Byte || Varies depending on block - see [[Block_Actions]]
+ | rowspan="12"| 0x47
-|-
+ | rowspan="12"| Play
-| Block Type || VarInt || The block type for the block
+ | rowspan="12"| Client
-|}
+ | Dimension Type
+ | {{change|Identifier|VarInt}}
+ | The ID of the type of dimension in the <code>minecraft:dimension_type</code> registry, defined by the [[Protocol#Registry_Data|Registry Data]] packet.
+ |-
+ | Dimension Name
+ | {{Type|Identifier}}
+ | Name of the dimension being spawned into.
+ |-
+ | Hashed seed
+ | {{Type|Long}}
+ | First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
+ |-
+ | Game mode
+ | {{Type|Unsigned Byte}}
+ | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
+ |-
+ | Previous Game mode
+ | {{Type|Byte}}
+ | -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
+ |-
+ | Is Debug
+ | {{Type|Boolean}}
+ | True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
+ |-
+ | Is Flat
+ | {{Type|Boolean}}
+ | True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
+ |-
+ | Has death location
+ | {{Type|Boolean}}
+ | If true, then the next two fields are present.
+ |-
+ | Death dimension Name
+ | {{Type|Optional}} {{Type|Identifier}}
+ | Name of the dimension the player died in.
+ |-
+ | Death location
+ | {{Type|Optional}} {{Type|Position}}
+ | The location that the player died at.
+ |-
+ | Portal cooldown
+ | {{Type|VarInt}}
+ | The number of ticks until the player can use the portal again.
+ |-
+ | Data kept
+ | {{Type|Byte}}
+ | Bit mask. 0x01: Keep attributes, 0x02: Keep metadata. Tells which data should be kept on the client side once the player has respawned.
+In the Notchian implementation, this is context dependent:
+* normal respawns (after death) keep no data;
+* exiting the end poem/credits keeps the attributes;
+* other dimension changes (portals or teleports) keep all data.
+ |}
-==== Block Break Animation ====
+==== Store Cookie (play) ====
--9 are the displayable destroy stages and each other number means that there is no animation on this coordinate.
+Stores some arbitrary data on the client, which persists between server transfers. The Notchian client only accepts cookies of up to 5 kiB in size.
-You can also set an animation to air! The animation will still be visible.
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
+ |-
+ | rowspan="3"| 0x6B
+ | rowspan="3"| Play
+ | rowspan="3"| Client
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+ | The identifier of the cookie.
+ |-
+ | colspan="2"| Payload Length
+ | colspan="2"| VarInt
+ | Length of the following byte array.
+ |-
+ | colspan="2"| Payload
+ | colspan="2"| Byte Array (5120)
+ | The data of the cookie.
+ |}
-If you need to display several break animations at the same time you have to give each of them a unique Entity ID.
+==== Transfer (play) ====
-Also if you set the coordinates to a special block like water etc. it won't show the actual break animation but some other interesting effects. (Water will loose it's transparency)
+Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
-{| class="wikitable"
+{| class="wikitable" {{added}}
-! Packet ID !! Field Name !! Field Type !! Notes
+ ! Packet ID
-|-
+ ! State
-| rowspan=3 | 0x25
+ ! Bound To
-| Entity ID || VarInt || Entity's ID
+ ! colspan="2"| Field Name
-|-
+ ! colspan="2"| Field Type
-| Location || Position || Block Position
+ ! Notes
-|-
+ |-
-| Destroy Stage || Byte || 0 - 9
+ | rowspan="2"| 0x73
-|}
+ | rowspan="2"| Play
+ | rowspan="2"| Client
+ | colspan="2"| Host
+ | colspan="2"| String
+ | The hostname of IP of the server.
+ |-
+ | colspan="2"| Port
+ | colspan="2"| VarInt
+ | The port of the server.
+ |}
-==== Effect ====
+==== Update Attributes ====
-Sent when a client is to play a sound or particle effect.
+Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
-By default, the minecraft client adjusts the volume of sound effects based on distance. The final boolean field is used to disable this, and instead the effect is played from 2 blocks away in the correct direction. Currently this is only used for effect 1013 (mob.wither.spawn), and is ignored for any other value by the client.
 {| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
+ ! Packet ID
-|-
+ ! State
-| rowspan="4" | 0x28
+ ! Bound To
-| Effect ID || Int || The ID of the effect, see below.
+ ! colspan="2"| Field Name
-|-
+ ! colspan="2"| Field Type
-| Location || Position|| The location of the effect
+ ! Notes
-|-
+ |-
-| Data || Int || Extra data for certain effects, see below.
+ | rowspan="6"| 0x71
-|-
+ | rowspan="6"| Play
-| Disable relative volume || Bool || See above
+ | rowspan="6"| Client
-|}
+ | colspan="2"| Entity ID
+ | colspan="2"| VarInt
+ |
+ |-
+ | colspan="2"| Number Of Properties
+ | colspan="2"| VarInt
+ | Number of elements in the following array.
+ |-
+ | rowspan="4"| Property
+ | {{change|Key|Id}}
+ | rowspan="4"| Array
+ | {{change|Identifier|VarInt Enum}}
+ | See below.
+ |-
+ | Value
+ | Double
+ | See below.
+ |-
+ | Number Of Modifiers
+ | VarInt
+ | Number of elements in the following array.
+ |-
+ | Modifiers
+ | Array of Modifier Data
+ | See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
+ |}
-===== Effects =====
+Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
-{| class="wikitable"
+These changed between 24w03b and 24w13a, TODO: Update this
-! ID !! Name
-|-
-| colspan=2 | '''Sound'''
-|-
-| 1000|| <code>random.click</code>
-|-
-| 1001|| <code>random.click</code>
-|-
-| 1002|| <code>random.bow</code>
-|-
-| 1003|| <code>random.door_open</code> or <code>random.door_close</code> (50/50 chance)
-|-
-| 1004|| <code>random.fizz</code>
-|-
-| 1005|| Play a music disc. '''Data''' [http://www.minecraftwiki.net/wiki/Music_Discs Record ID]
-|-
-| ''(1006 not assigned)'' ||
-|-
-| 1007|| <code>mob.ghast.charge</code>
-|-
-| 1008|| <code>mob.ghast.fireball</code>
-|-
-| 1009|| <code>mob.ghast.fireball</code>, but with a lower volume.
-|-
-| 1010|| <code>mob.zombie.wood</code>
-|-
-| 1011|| <code>mob.zombie.metal</code>
-|-
-| 1012|| <code>mob.zombie.woodbreak</code>
-|-
-| 1013|| <code>mob.wither.spawn</code>
-|-
-| 1014|| <code>mob.wither.shoot</code>
-|-
-| 1015|| <code>mob.bat.takeoff</code>
-|-
-| 1016|| <code>mob.zombie.infect</code>
-|-
-| 1017|| <code>mob.zombie.unfect</code>
-|-
-| 1018|| <code>mob.enderdragon.end</code>
-|-
-| 1020|| <code>random.anvil_break</code>
-|-
-| 1021|| <code>random.anvil_use</code>
-|-
-| 1022|| <code>random.anvil_land</code>
-|-
-| colspan=2 | '''Particle'''
-|-
-| 2000|| Spawns 10 smoke particles, e.g. from a fire. '''Data''' direction, see below
-|-
-| 2001|| Block break. '''Data''' [http://www.minecraftwiki.net/wiki/Data_values Block ID]
-|-
-| 2002|| Splash potion. Particle effect + glass break sound. '''Data''' [http://www.lb-stuff.com/Minecraft/PotionDataValues1.9pre3.txt Potion ID]
-|-
-| 2003|| Eye of ender entity break animation - particles and sound
-|-
-| 2004|| Mob spawn particle effect: smoke + flames
-|-
-| 2005|| Spawn "happy villager" effect (green crosses), used for bonemealing vegetation.
-|}
-Smoke directions:
 {| class="wikitable"
-! ID !! Direction
+ |-
-|-
+ ! Id
-| 0 || South - East
+ ! Key
-|-
+ ! Default
-| 1 || South
+ ! Min
-|-
+ ! Max
-| 2 || South - West
+ ! Label
-|-
+ |-
-| 3 || East
+ | 0
-|-
+ | generic.armor
-| 4 || (Up or middle ?)
+ | 0.0
-|-
+ | 0.0
-| 5 || West
+ | 30.0
-|-
+ | Armor.
-| 6 || North - East
+ |-
-|-
+ | 1
-| 7 || North
+ | generic.armor_toughness
-|-
+ | 0.0
-| 8 || North - West
+ | 0.0
-|}
+ | 20.0
+ | Armor Toughness.
+ |-
+ | 2
+ | generic.attack_damage
+ | 2.0
+ | 0.0
+ | 2048.0
+ | Attack Damage.
+ |-
+ | 3
+ | generic.attack_knockback
+ | 0.0
+ | 0.0
+ | 5.0
+ | Attack Knockback.
+ |-
+ | 4
+ | generic.attack_speed
+ | 4.0
+ | 0.0
+ | 1024.0
+ | Attack Speed.
+ |- {{added}}
+ | 5
+ | generic.block_interaction_range
+ | 4.5
+ | 0.0
+ | 64.0
+ | Block Interaction Range.
+ |- {{added}}
+ | 6
+ | generic.entity_interaction_range
+ | 3.0
+ | 0.0
+ | 64.0
+ | Entity Interaction Range.
+ |-
+ | 7
+ | generic.flying_speed
+ | 0.4
+ | 0.0
+ | 1024.0
+ | Flying Speed.
+ |-
+ | 8
+ | generic.follow_range
+ | 32.0
+ | 0.0
+ | 2048.0
+ | Follow Range.
+ |-
+ | 9
+ | horse.jump_strength
+ | 0.7
+ | 0.0
+ | 2.0
+ | Jump Strength.
+ |-
+ | 10
+ | generic.knockback_resistance
+ | 0.0
+ | 0.0
+ | 1.0
+ | Knockback Resistance.
+ |-
+ | 11
+ | generic.luck
+ | 0.0
+ | -1024.0
+ | 1024.0
+ | Luck.
+ |-
+ | 12
+ | generic.max_absorption
+ | 0.0
+ | 0.0
+ | 2048.0
+ | Max Absorption.
+ |-
+ | 13
+ | generic.max_health
+ | 20.0
+ | 1.0
+ | 1024.0
+ | Max Health.
+ |-
+ | 14
+ | generic.movement_speed
+ | 0.7
+ | 0.0
+ | 1024.0
+ | Movement Speed.
+ |- {{added}}
+ | 15
+ | generic.scale
+ | 1.0
+ | 0.0625
+ | 16.0
+ | Scale.
+ |-
+ | 16
+ | zombie.spawn_reinforcements
+ | 0.0
+ | 0.0
+ | 1.0
+ | Spawn Reinforcements Chance.
+ |- {{added}}
+ | 17
+ | generic.step_height
+ | 0.6
+ | 0.0
+ | 10.0
+ | Step Height.
+ |}
-==== Open Window ====
+''Modifier Data'' structure:
-This is sent to the client when it should open an inventory, such as a chest, workbench, or furnace. This message is not sent anywhere for clients opening their own inventory.
 {| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
+ |-
-|-
+ ! Field Name
-| rowspan="6" | 0x2D
+ ! Field Type
-| Window id || Unsigned Byte || A unique id number for the window to be displayed.  Notchian server implementation is a counter, starting at 1.
+ ! Notes
-|-
+ |-
-| Inventory Type || String || The window type to use for display.  Check below
+ | UUID
-|-
+ | UUID
-| Window title || String (JSON) || The title of the window.
+ |
-|-
+  |-
-| Number of Slots || Unsigned Byte || Number of slots in the window (excluding the number of slots in the player inventory).
+ | Amount
-|-
+  | Double
-| Entity ID || Int || EntityHorse's entityId. Only sent when window type is equal to "EntityHorse".
+ | May be positive or negative.
-|}
+ |-
+ | Operation
+ | Byte
+ | See below.
+ |}
-See [[Inventory#Windows|inventory windows]] for further information.
+The operation controls how the base value of the modifier is changed.
-==== Update Sign ====
+* 0: Add/subtract amount
+* 1: Add/subtract amount percent of the current value
+* 2: Multiply by amount percent
-This message is sent from the server to the client whenever a sign is discovered or created. This message is NOT sent when a sign is destroyed or unloaded.
+All of the 0's are applied first, and then the 1's, and then the 2's.
-{| class="wikitable"
+==== Entity Effect ====
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan="7" | 0x33
-| Location || Position || Block Coordinates
-|-
-| Line 1 || String || First line of text in the sign
-|-
-| Line 2 || String || Second line of text in the sign
-|-
-| Line 3 || String || Third line of text in the sign
-|-
-| Line 4 || String || Fourth line of text in the sign
-|}
-==== Update Block Entity ====
-Essentially a block update on a block entity.
 {| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
+ ! Packet ID
-|-
+ ! State
-| rowspan="4" | 0x35
+ ! Bound To
-| Location || Position ||
+ ! Field Name
-|-
+ ! Field Type
-| Action || Unsigned Byte || The type of update to perform
+ ! Notes
-|-
+ |-
-| Data length || Short || Varies
+ | rowspan="7"| 0x72
-|-
+ | rowspan="7"| Play
-| NBT Data || Byte Array || Present if data length > 0. Compressed with [[wikipedia:Gzip|gzip]]. Varies
+ | rowspan="7"| Client
-|}
+ | Entity ID
+ | VarInt
+ |
+ |-
+ | Effect ID
+ | VarInt
+ | See {{Minecraft Wiki|Status effect#Effect list|this table}}.
+ |-
+ | Amplifier
+ | Byte
+ | Notchian client displays effect level as Amplifier + 1.
+ |-
+ | Duration
+ | VarInt
+ | Duration in ticks. (-1 for infinite)
+ |-
+ | Flags
+ | Byte
+ | Bit field, see below.
+ |- {{removed}}
+ | Has Factor Data
+ | Boolean
+ | Used in DARKNESS effect
+ |- {{removed}}
+ | Factor Codec
+ | NBT Tag
+ | See below
+ |}
-'''Actions'''
+{{Need Info|What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?}}
-* '''1''': Set mob displayed inside a mob spawner. Custom 1 contains the [[Entities#Mobs|mob type]]
+Within flags:
-==== Sign Editor Open ====
+* 0x01: Is ambient - was the effect spawned from a beacon?  All beacon-generated effects are ambient.  Ambient effects use a different icon in the HUD (blue border rather than gray).  If all effects on an entity are ambient, the [[Entity_metadata#Living Entity|"Is potion effect ambient" living metadata field]] should be set to true.  Usually should not be enabled.
+* 0x02: Show particles - should all particles from this effect be hidden?  Effects with particles hidden are not included in the calculation of the effect color, and are not rendered on the HUD (but are still rendered within the inventory).  Usually should be enabled.
+* 0x04: Show icon - should the icon be displayed on the client?  Usually should be enabled.
+* {{change||0x08: Blend - should the effect's hard-coded blending be applied?  Currently only used in the DARKNESS effect to apply extra void fog and adjust the gamma value for lighting.}}
-Sent on placement of sign.
+{{change|Factor Data|}}
+{| class="wikitable" {{removed}}
-{| class="wikitable"
+ !Name
-! Packet ID !! Field Name !! Field Type !! Notes
+ !Type
-|-
+ !style="width: 250px;" colspan="2"| Notes
-| rowspan="3" | 0x36
+ |-
-| Location || Position || Block coordinates
+ | padding_duration
-|}
+ | TAG_INT
+ |
-==== Player List Item ====
+ |-
+ | factor_start
-Sent by the notchian server to update the user list (<tab> in the client).
+ | TAG_FLOAT
+ |
-{| class="wikitable"
+ |-
-! Packet ID !! Field Name !! Field Type !! Notes
+ | factor_target
-|-
+ | TAG_FLOAT
-| rowspan="3" | 0x38
+ |
-| Player name || String || Supports chat colouring, limited to 16 characters.
+ |-
-|-
+ | factor_current
-| Online || Bool || The client will remove the user from the list if false.
+ | TAG_FLOAT
-|-
+ |
-| Ping || VarInt || Ping, presumably in ms.
+ |-
-|}
+ | effect_changed_timestamp
+ | TAG_INT
-==== Scoreboard Objective ====
+ |-
+ | factor_previous_frame
-This is sent to the client when it should create a new scoreboard or remove one.
+ | TAG_FLOAT
+ |-
-{| class="wikitable"
+ | had_effect_last_tick
-! Packet ID !! Field Name !! Field Type !! Notes
+ | TAG_BOOLEAN
-|-
+ |}
-| rowspan="4" | 0x3B
-| Objective name || String || An unique name for the objective
-|-
-| Mode || Byte || 0 to create the scoreboard. 1 to remove the scoreboard. 2 to update the display text.
-|-
-| Objective value || String || Only if mode is 0 or 2. The text to be displayed for the score.
-|-
-| Type || String || Only if mode is 0 or 2. "integer" or "hearts"
-|}
-==== Update Score ====
-This is sent to the client when it should update a scoreboard item.
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan="4" | 0x3C
-| Item Name || String || An unique name to be displayed in the list.
-|-
-| Update/Remove || Byte || 0 to create/update an item. 1 to remove an item.
-|-
-| Score Name || String || The unique name for the scoreboard to be updated. Only sent when Update/Remove does not equal 1.
-|-
-| Value || VarInt || The score to be displayed next to the entry. Only sent when Update/Remove does not equal 1.
-|}
-{{Warning|The final String and Int are only sent if the Update/Remove Byte does not equal 1}}
-==== Teams ====
-Creates and updates teams.
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan="10" | 0x3E
-| Team Name || String || A unique name for the team. (Shared with scoreboard).
-|-
-| Mode || Byte || If 0 then the team is created.
-If 1 then the team is removed.
-If 2 the team team information is updated.
-If 3 then new players are added to the team.
-If 4 then players are removed from the team.
-|-
-| Team Display Name || String || Only if Mode = 0 or 2.
-|-
-| Team Prefix || String || Only if Mode = 0 or 2. Displayed before the players' name that are part of this team.
-|-
-| Team Suffix || String || Only if Mode = 0 or 2. Displayed after the players' name that are part of this team.
-|-
-| Friendly fire || Byte || Only if Mode = 0 or 2; 0 for off, 1 for on, 3 for seeing friendly invisibles
-|-
-| Name Tag Visibility || String || always, hideForOtherTeams, hideForOwnTeam, never. Only if Mode = 0 or 2.
-|-
-| Color || Byte || Same as chat colors. Only if Mode = 0 or 2.
-|-
-| Player count || VarInt || Only if Mode = 0 or 3 or 4. Number of players in the array
-|-
-| Players || Array of strings || Only if Mode = 0 or 3 or 4. Players to be added/remove from the team. Max 40 characters so may be uuid's later
-|}
-==== Server Difficulty ====
-Changes the difficulty setting in the client's option menu
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan="1" | 0x41
-| Difficulty || Unsigned Byte || 0:PEACEFUL, 1:EASY, 2:NORMAL, 3: HARD
-|}
-==== Combat Event ====
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan="6" | 0x42
-| Event || Unsigned Byte || 0 ENTER_COMBAT, 1 END_COMBAT, 2 ENTITY_DEAD
-|-
-| Duration || VarInt || Only for END_COMBAT
-|-
-| Entity ID || Int || Only for END_COMBAT
-|-
-| Player ID || VarInt || Only for ENTITY_DEAD
-|-
-| Entity ID || Int || Only for ENTITY_DEAD
-|-
-| Message || String || Only for ENTITY_DEAD
-|}
-==== Camera ====
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=1 | 0x43
-| Camera ID || VarInt ||
-|}
-==== World Border ====
-{| class="wikitable"
-! Packet ID !! colspan=2 | Field Name !! Field Type !! Notes
-|-
-| rowspan=14 | 0x44
-| colspan=2 | Action || VarInt ||
-|-
-! Action !! Name !! !!
-|-
-| 1 (SET_SIZE)
-| Radius || Double ||
-|-
-| rowspan=3 | 2 (LERP_SIZE)
-| Old radius || Double ||
-|-
-| New radius || Double ||
-|-
-| Speed || VarInt ||
-|-
-| rowspan=2 | 3 (SET_CENTER)
-| X || Double ||
-|-
-| Z || Double ||
-|-
-| rowspan=6 | 3 (INITIALIZE)
-| A || Double ||
-|-
-| B || Double ||
-|-
-| C || Double ||
-|-
-| D || Double ||
-|-
-| E || VarInt ||
-|-
-| F || VarInt ||
-|}
 === Serverbound ===
-==== Keep Alive ====
+==== Chat Command ====
-The server will frequently send out a keep-alive, each containing a random ID. The client must respond with the same packet.
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=1 | 0x00
-| Keep Alive ID || VarInt ||
-|}
-==== Use Entity ====
-This packet is sent from the client to the server when the client attacks or right-clicks another entity (a player, minecart, etc).
-A Notchian server only accepts this packet if the entity being attacked/used is visible without obstruction and within a 4-unit radius of the player's position.
-Note that middle-click in creative mode is interpreted by the client and sent as a Creative Inventory Action packet instead.
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=2 | 0x02
-| Target || VarInt ||
-|-
-| Mouse || Unsigned Byte || 0 = Left-click, 1 = Right-click
-|}
-==== Player Position ====
-Updates the players XYZ position on the server.
-If <code>HeadY - FeetY</code> is less than <code>0.1</code> or greater than <code>1.65</code>, the stance is illegal and the client will be kicked with the message “Illegal Stance”.
-If the distance between the last known position of the player on the server and the new position set by this packet is greater than 100 units will result in the client being kicked for "You moved too quickly :( (Hacking?)"
-Also if the fixed-point number of X or Z is set greater than <code>3.2E7D</code> the client will be kicked for "Illegal position"
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=5| 0x04
-| X || Double || Absolute position
-|-
-| FeetY || Double || Absolute feet position, normally HeadY - 1.62. Used to modify the players bounding box when going up stairs, crouching, etc…
-|-
-| Z || Double || Absolute position
-|-
-| On Ground || Bool || True if the client is on the ground, False otherwise
-|}
-==== Player Position And Look ====
-A combination of Player Look and Player position.
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=7| 0x06
-| X || Double || Absolute position
-|-
-| FeetY || Double || Absolute feet position. Is normally HeadY - 1.62. Used to modify the players bounding box when going up stairs, crouching, etc…
-|-
-| Z || Double || Absolute position
-|-
-| Yaw || Float || Absolute rotation on the X Axis, in degrees
-|-
-| Pitch || Float || Absolute rotation on the Y Axis, in degrees
-|-
-| On Ground || Bool || True if the client is on the ground, False otherwise
-|}
-==== Player Digging ====
-Sent when the player mines a block.  A Notchian server only accepts digging packets with coordinates within a 6-unit radius of the player's position.
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan="3" | 0x07
-| Status || Byte || The action the player is taking against the block (see below)
-|-
-| Location || Position || Block position
-|-
-| Face || Byte || The face being hit (see below)
-|}
-Status can (currently) be one of six values:
-{| class="wikitable"
-! Meaning !! Value
-|-
-| Started digging || <code>0</code>
-|-
-| Cancelled digging || <code>1</code>
-|-
-| Finished digging || <code>2</code>
-|-
-| Drop item stack || <code>3</code>
-|-
-| Drop item || <code>4</code>
-|-
-| Shoot arrow / finish eating || <code>5</code>
-|}
-Notchian clients send a 0 (started digging) when they start digging and a 2 (finished digging) once they think they are finished. If digging is aborted, the client simply send a 1 (Cancel digging).
-Status code 4 (drop item) is a special case.  In-game, when you use the Drop Item command (keypress 'q'), a dig packet with a status of 4, and all other values set to 0, is sent from client to server. Status code 3 is similar, but drops the entire stack.
-Status code 5 (shoot arrow / finish eating) is also a special case. The x, y and z fields are all set to 0 like above, with the exception of the face field, which is set to 255.
-The face can be one of six values, representing the face being hit:
-{| class="wikitable"
-|-
-| Value || 0 || 1 || 2 || 3 || 4 || 5
-|-
-| Offset || -Y || +Y || -Z || +Z || -X || +X
-|}
-In 1.7.3, when a player opens a door with left click the server receives Packet 0xE+start digging and opens the door.
-==== Player Block Placement ====
 {| class="wikitable"
-|-
+ ! Packet ID
-! Packet ID !! Field Name !! Field Type !! Notes
+ ! State
-|-
+ ! Bound To
-| rowspan="6" | 0x08
+ ! colspan="2"| Field Name
-| Location || Position || Block position
+ ! colspan="2"| Field Type
-|-
+ ! Notes
-| Direction || Byte || The offset to use for block/item placement (see below)
+ |-
-|-
+ | rowspan="8"| 0x04
-| Held item || [[Slot_Data|Slot]] ||
+ | rowspan="8"| Play
-|-
+ | rowspan="8"| Server
-| Cursor position X || Byte || The position of the crosshair on the block
+ | colspan="2"| Command
-|-
+ | colspan="2"| {{Type|String}} (256)
-| Cursor position Y || Byte ||
+ | colspan="2"| The command typed by the client.
-|-
+ |- {{removed}}
-| Cursor position Z || Byte ||
+ | colspan="2"| Timestamp
-|}
+ | colspan="2"| {{Type|Long}}
-In normal operation (ie placing a block), this packet is sent once, with the values set normally.
+ | colspan="2"| The timestamp that the command was executed.
+ |- {{removed}}
+ | colspan="2"| Salt
+ | colspan="2"| {{Type|Long}}
+ | colspan="2"| The salt for the following argument signatures.
+ |- {{removed}}
+ | colspan="2"| Array length
+ | colspan="2"| {{Type|VarInt}}
+ | colspan="2"| Number of entries in the following array. The maximum length in Notchian server is 8.
+ |- {{removed}}
+ | rowspan="2"| Array of argument signatures
+ | Argument name
+ | rowspan="2"| {{Type|Array}} (8)
+ | {{Type|String}} (16)
+ | The name of the argument that is signed by the following signature.
+ |- {{removed}}
+ | Signature
+ | {{Type|Byte Array}} (256)
+ | The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
+ |- {{removed}}
+ | colspan="2"| Message Count
+ | colspan="2"| {{Type|VarInt}}
+ | colspan="2"|
+ |- {{removed}}
+ | colspan="2"| Acknowledged
+ | colspan="2"| {{Type|Fixed BitSet}} (20)
+ | colspan="2"|
+ |}
-This packet has a special case where X, Y, Z, and Direction are all -1. (Note that Y is unsigned so set to 255.) This special packet indicates that the currently held item for the player should have its state updated such as eating food, shooting bows, using buckets, etc.
-In a Notchian Beta client, the block or item ID corresponds to whatever the client is currently holding, and the client sends one of these packets any time a right-click is issued on a surface, so no assumptions can be made about the safety of the ID.  However, with the implementation of server-side inventory, a Notchian server seems to ignore the item ID, instead operating on server-side inventory information and holding selection. The client has been observed (1.2.5 and 1.3.2) to send both real item IDs and -1 in a single session.
+==== Signed Chat Command ====
-Special note on using buckets:  When using buckets, the Notchian client might send two packets:  first a normal and then a special case.  The first normal packet is sent when you're looking at a block (e.g. the water you want to scoop up).  This normal packet does not appear to do anything with a Notchian server.  The second, special case packet appears to perform the action - based on current position/orientation and with a distance check - it appears that buckets can only be used within a radius of 6 units.
+{| class="wikitable" {{added}}
+  ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
+ |-
+ | rowspan="8"| 0x05
+ | rowspan="8"| Play
+ | rowspan="8"| Server
+ | colspan="2"| Command
+ | colspan="2"| String(256)
+ | The command typed by the client.
+  |-
+ | colspan="2"| Timestamp
+ | colspan="2"| Long
+  | The timestamp that the command was executed. Milliseconds since the Unix epoch.
+ |-
+ | colspan="2"| Salt
+ | colspan="2"| Long
+ | The salt for the following argument signatures.
+ |-
+ | colspan="2"| Argument Signature Count
+ | colspan="2"| VarInt
+  | Number of elements in the following array. The maximum length in Notchian server is 8.
+ |-
+  | rowspan="2"| Argument Signatures
+ | Name
+ | rowspan="2"| Array
+ | String(16)
+ | The name of the argument that is signed by the following signature.
+ |-
+ | Signature
+ | ByteArray(256)
+ | The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
+ |-
+ | colspan="2"| Seen Messages Offset
+ | colspan="2"| VarInt
+ |
+ |-
+ | colspan="2"| Seen Messages Acknowledged
+ | colspan="2"| Fixed BitSet(20)
+ |
+ |}
-==== Animation ====
+==== Cookie Response (play) ====
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=1 | 0x0A || || ||
-|}
-==== Entity Action ====
+Response to a [[#Cookie_Request_(play)|Cookie Request (play)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
-Sent at least when crouching, leaving a bed, or sprinting.
+{| class="wikitable" {{added}}
-To send action animation to client use 0x28.
+ ! Packet ID
-The client will send this with Action ID = 3 when "Leave Bed" is clicked.
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
+ |-
+ | rowspan="4"| 0x11
+ | rowspan="4"| Play
+ | rowspan="4"| Server
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+ | The identifier of the cookie.
+ |-
+ | colspan="2"| Has Payload
+ | colspan="2"| Boolean
+ | The payload is only present if the cookie exists on the client.
+ |-
+ | colspan="2"| Payload Length
+ | colspan="2"| Optional VarInt
+ | Length of the following byte array.
+ |-
+ | colspan="2"| Payload
+ | colspan="2"| Optional Byte Array (5120)
+ | The data of the cookie, if any.
+ |}
-{| class="wikitable"
+==== Debug Sample Subscription ====
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan="3" | 0x0B
-| Entity ID || VarInt || Player ID
-|-
-| Action ID || Unsigned Byte || The ID of the action, see below.
-|-
-| Jump Boost || VarInt || Horse jump boost. Ranged from 0 -> 100.
-|}
-Action ID can be one of the following values:
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! Field Name
+ ! Field Type
+ ! Notes
+ |-
+ | 0x13
+ | Play
+ | Server
+ | Sample Type
+ | VarInt Enum
+ | The type of debug sample to subscribe to. Currently always 0 (TICK_TIME).
+ |}
-{| class="wikitable"
+[[Category:Minecraft Modern]]
-! ID !! Action
-|-
-| 0 || Crouch
-|-
-| 1 || Uncrouch
-|-
-| 2 || Leave bed
-|-
-| 3 || Start sprinting
-|-
-| 4 || Stop sprinting
-|-
-| 5 || Jump with horse
-|-
-| 6 || Open inventory
-|}
-==== Steer Vehicle ====
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan="4" | 0x0C
-| Sideways || Float || Positive to the left of the player
-|-
-| Forward || Float || Positive forward
-|-
-| Flags|| Unsigned Byte || 0x1 Jump, 0x2 Unmount
-|}
-==== Update Sign ====
-This message is sent from the client to the server when the "Done" button is pushed after placing a sign.
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan="7" | 0x12
-| Location || Position || Block Coordinates
-|-
-| Line 1 || String || First line of text in the sign
-|-
-| Line 2 || String || Second line of text in the sign
-|-
-| Line 3 || String || Third line of text in the sign
-|-
-| Line 4 || String || Fourth line of text in the sign
-|}
-==== Client Settings ====
-Sent when the player connects, or when settings are changed.
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan="6" | 0x15
-| Locale || String || en_GB
-|-
-| View distance || Byte || 0-3 for 'far', 'normal', 'short', 'tiny'.
-|-
-| Chat flags || Byte || Chat settings. See notes below.
-|-
-| Chat colours || Bool || "Colours" multiplayer setting
-|-
-| Displayed skin parts || Unsigned Byte || Unknown
-|}
-Chat flags has several values packed into one byte.
-'''Chat Enabled:''' Bits 0-1. 00: Enabled.  01: Commands only.  10: Hidden.
-==== Client Status ====
-Sent when the client is ready to complete login and when the client is ready to respawn after death.
-{| class="wikitable"
-! Packet ID !! Field Name !! Field Type !! Notes
-|-
-| rowspan=1 | 0x16
-| Action ID || Unsigned Byte || See below
-|}
-Action ID values:
-{| class="wikitable"
-|-
-! Action ID !! Name
-|-
-| 0 || Perform respawn
-|-
-| 1 || Request stats
-|-
-| 2 || Open inventory achievement
-|}

Difference between revisions of "Pre-release protocol"

Latest revision as of 19:57, 25 April 2024

Contents

Contents

Data types

Packets

New/modified data types

Entity Metadata

Living Entity

Wolf

Armadillo

Block Actions

Inventories

Plugin Channels

Handshake

Serverbound

Handshake

Status

Clientbound

Serverbound

Login

Clientbound

Encryption Request

Cookie Request (login)

Serverbound

Cookie Response (login)

Configuration

Clientbound

Cookie Request (configuration)

Reset Chat

Registry Data

Store Cookie (configuration)

Transfer (configuration)

Clientbound Known Packs

Serverbound

Cookie Response (configuration)

Serverbound Known Packs

Play

Clientbound

Cookie Request (play)

Debug Sample

Login (play)

Respawn

Store Cookie (play)

Transfer (play)

Update Attributes

Entity Effect

Serverbound

Chat Command

Signed Chat Command

Cookie Response (play)

Debug Sample Subscription

Navigation menu

Search