Difference between revisions of "Pre-release protocol"

Latest revision as of 22:19, 9 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

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 [[Protocol version numbers|1.13.2, protocol 404]]) to the current pre-release (currently [[Protocol version numbers|18w50a, protocol 451]]). 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.
 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.
@@ Line 9: / Line 9: @@
 === Data types ===
-==== Position ====
+No changes so far.
--bit value split in to three parts
-* x: 26 MSBs
-* z: 26 {{change|LSBs|middle bits}}
-* y: 12 {{change|bits between them|LSBs}}
-Encoded as followed:
- ((x & 0x3FFFFFF) << 38) | {{change|((y & 0xFFF) << 26) {{!}} (z & 0x3FFFFFF)|((z & 0x3FFFFFF) << 12) {{!}} (y & 0xFFF)}}
-And decoded as:
- val = read_unsigned_long();
- x = val >> 38;
- y = {{change|(val >> 26) & 0xFFF|val & 0xFFF}};
- z = {{change|val << 38 >> 38|(val << 38 >> 38) >> 12}};
-Note: The details of bit shifting are rather language dependent; the above may work in Java but probably won't in other languages without some tweaking. In particular, you will usually receive positive numbers even if the actual coordinates are negative. This can be fixed by adding something like the following:
- if x >= 2^25 { x -= 2^26 }
- if y >= 2^11 { y -= 2^12 }
- if z >= 2^25 { z -= 2^26 }
 === Packets ===
@@ Line 41: / Line 18: @@
   !colspan="2"| Documentation
   |-
-!colspan="4"| Handshaking serverbound
+ !colspan="4"| Handshake serverbound
-{{PacketList|0x00|Handshake}}
+ {{PacketList|0x00|Handshake}}
+ |-
+ !colspan="4"| Login clientbound
+ {{PacketList|0x01|Encryption Request}}
+ {{PacketList|0x05|Cookie Request (login)|rel=added}}
+ |-
+ !colspan="4"| Login serverbound
+ {{PacketList|0x04|Cookie Response (login)|rel=added}}
+ |-
+ !colspan="4"| Configuration clientbound
+ {{PacketList|0x00|Cookie Request (configuration)|rel=added}}
+ {{PacketList|{{change|0x00|0x01}}|Clientbound Plugin Message (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x01|0x02}}|Disconnect (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
+ {{PacketList|{{change|0x03|0x04}}|Clientbound Keep Alive (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x04|0x05}}|Ping (configuration)|pre=unchanged}}
+ {{PacketList|0x06|Reset Chat|rel=added}}
+ {{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
+ !colspan="4"| Play clientbound
-{{PacketList|0x09|Update Block Entity}}
+ {{PacketList|0x16|Cookie Request (Play)|rel=added}}
-{{PacketList|0x22|Chunk Data}}
+ {{PacketList|{{change|0x16|0x17}}|Set Cooldown|pre=unchanged}}
-{{PacketList|0x2C|Unknown|rel=added}}
+ {{PacketList|{{change|0x17|0x18}}|Chat Suggestions|pre=unchanged}}
-|colspan="4"|shift of +1 for all I'm not typing right now
+ {{PacketList|{{change|0x18|0x19}}|Clientbound Plugin Message (play)|pre=unchanged}}
-{{PacketList|0x4E|Entity Sound Effect|rel=added}}
+ {{PacketList|{{change|0x19|0x1A}}|Damage Event|pre=unchanged}}
-{{PacketList|{{change|0x4E|0x4F}}|Player List Header And Footer|pre=unchanged}}
+ {{PacketList|0x1B|Debug Sample|rel=added}}
-{{PacketList|{{change|0x4F|0x50}}|Collect Item|pre=unchanged}}
+ {{PacketList|{{change|0x1A|0x1C}}|Delete Message|pre=unchanged}}
-{{PacketList|{{change|0x50|0x51}}|Entity Teleport|pre=unchanged}}
+ {{PacketList|{{change|0x1B|0x1D}}|Disconnect (play)|pre=unchanged}}
-{{PacketList|{{change|0x51|0x52}}|Advancements|pre=unchanged}}
+ {{PacketList|{{change|0x1C|0x1E}}|Disguised Chat Message|pre=unchanged}}
-{{PacketList|{{change|0x52|0x53}}|Entity Properties|pre=unchanged}}
+ {{PacketList|{{change|0x1D|0x1F}}|Entity Event|pre=unchanged}}
-{{PacketList|{{change|0x53|0x54}}|Entity Effect|pre=unchanged}}
+ {{PacketList|{{change|0x1E|0x20}}|Explosion|pre=unchanged}}
-{{PacketList|{{change|0x54|0x55}}|Declare Recipes|pre=unchanged}}
+ {{PacketList|{{change|0x1F|0x21}}|Unload Chunk|pre=unchanged}}
-{{PacketList|{{change|0x55|0x56}}|Tags}}
+ {{PacketList|{{change|0x20|0x22}}|Game Event|pre=unchanged}}
-{{PacketList|0x57|Update Light|rel=added}}
+ {{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
+ !colspan="4"| Play serverbound
-{{PacketList|0x1B|Recipe Book Data}}
+ {{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}}
   |}
@@ Line 70: / Line 218: @@
 == Entity Metadata ==
-=== Mobs ===
+{{#vardefine: meta_prerelease | 1}}
-Entity IDs have shifted with the addition of some new mobs.
+{{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
+ |}
+=== Living Entity ===
-=== Arrow ===
+TODO: This has changed to use the PARTICLES attribute
-Extends [[#Entity|Entity]].
+=== Wolf ===
-Abstract base class for [[#TippedArrow|TippedArrow]] (which is used for regular arrows as well as tipped ones) and Spectral Arrow.
+{{Metadata inherit|Wolf|inherits=Tameable Animal}}
 {| class="wikitable"
@@ Line 85: / Line 331: @@
   !style="width: 250px;" colspan="2"| Meaning
   ! Default
+ |- {{added}}
+ | {{Metadata id|}}
+ | {{Metadata type|Wolf Variant}}
+ |colspan="2"| Wolf Variant
+ | PALE
   |-
-  | rowspan="3" | 6
+  | {{Metadata id|}}
-  | rowspan="3" | Byte
+  | {{Metadata type|Boolean}}
- ! Bit mask
+  |colspan="2"| Is begging
- ! Meaning
+ | false
-  | rowspan="3" | 0
   |-
-  | 0x01
+  | {{Metadata id|}}
-  | Is critical
+ | {{Metadata type|VarInt}}
+ |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
+  | 14 (Red)
   |-
-  | 0x02
+  | {{Metadata id|}}
- | Is noclip (used by loyalty tridents when returning)
+  | {{Metadata type|VarInt}}
- |-
+  |colspan="2"| Anger time
- | 7
- | OptUUID
- |colspan="2"| Shooter UUID
-  | Empty
- |- {{added}}
- | 8
- | Byte
-  |colspan="2"| Piercing level
   | 0
   |}
-=== TippedArrow ===
+=== Armadillo ===
-Extends [[#Arrow|Arrow]].
+{{Metadata inherit|Armadillo|inherits=Animal|start_at=17}}
+{| class="wikitable" {{added}}
-Used for both tipped and regular arrows.  If not tipped, then color is set to -1 and no tipped arrow particles are used.
-{| class="wikitable"
   ! Index
   ! Type
@@ Line 121: / Line 362: @@
   ! Default
   |-
-  | {{change|8|9}}
+  | {{Metadata id|added}}
-  | VarInt
+  | {{Metadata type|Armadillo State}}
-  |colspan="2"| Color (-1 for no particles)
+  |colspan="2"| Armadillo State
-  | -1
+  | IDLE
   |}
-=== Trident ===
+== Block Actions ==
+No changes so far.
+== Inventories ==
+No changes so far.
+== Plugin Channels ==
+No changes so far.
+== Handshake ==
+=== Serverbound ===
-Extends [[#Arrow|Arrow]].
+==== Handshake ====
+This causes the server to switch into the target state.
 {| class="wikitable"
-  ! Index
+  ! Packet ID
-  ! Type
+  ! State
-  !style="width: 250px;" colspan="2"| Meaning
+ ! Bound To
-  ! Default
+ ! Field Name
+ ! Field Type
+  ! Notes
+ |-
+ | rowspan="4"| 0x00
+ | 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.
   |-
-  | {{change|8|9}}
+  | Next State
-  | VarInt
+  | [[#Definitions:varint|VarInt]] [[#Definitions:enum|Enum]]
-  |colspan="2"| Loyalty level (enchantment)
+  | 1 for [[#Status|Status]], 2 for [[#Login|Login]]{{change||, 3 for [[#Login|Transfer]]}}.
- | 0
   |}
-=== Fireworks ===
+== Status ==
+=== Clientbound ===
+No changes so far.
+=== Serverbound ===
+No changes so far.
-Extends [[#Entity|Entity]].
+== Login ==
+=== Clientbound ===
+==== Encryption Request ====
 {| class="wikitable"
-  ! Index
+  ! Packet ID
-  ! Type
+  ! State
-  !style="width: 250px;" colspan="2"| Meaning
+ ! Bound To
-  ! Default
+ ! Field Name
+ ! Field Type
+  ! Notes
+ |-
+ | rowspan="6"| 0x01
+ | rowspan="6"| Login
+ | 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.
   |-
-  | 6
+  | Verify Token Length
-  | [[Slot]]
+  | {{Type|VarInt}}
- |colspan="2"| Firework info
+  | Length of Verify Token. Always 4 for Notchian servers.
-  | empty
   |-
-  | 7
+  | Verify Token
-  | {{Change|VarInt|OptUUID}}
+  | {{Type|Byte Array}}
-  |colspan="2"| Entity {{change|ID|UUID}} of entity which used firework (for elytra boosting)
+  | A sequence of random bytes generated by the server.
- | 0
+  |- {{added}}
-  |- {{Added}}
+  | Should Authenticate
-  | 8
+  | {{Type|Boolean}}
-  | Boolean
+  |
-  |colspan="2"| Shot at angle (from a crossbow)
- | false
   |}
-=== Illager Beast ===
+==== Cookie Request (login) ====
-Extends [[#Monster|Monster]]
-No additional metadata.
+Requests a cookie that was previously stored.
 {| class="wikitable" {{added}}
-  ! Status
+  ! Packet ID
-  !colspan="2"| Description
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+  ! colspan="2"| Field Type
+ ! Notes
   |-
-  | 4
+  | rowspan="1"| 0x05
-  |colspan="2"| Starts the attack animation.
+  | rowspan="1"| Login
-  |-
+  | rowspan="1"| Client
-  | 39
+  | colspan="2"| Key
-  |colspan="2"| Starts the stun animation.
+  | colspan="2"| Identifier
+ | The identifier of the cookie.
   |}
-=== Panda ===
+=== Serverbound ===
+==== Cookie Response (login) ====
-Extends [[#Animal|Animal]].
+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" {{added}}
-  ! Index
+  ! Packet ID
-  ! Type
+  ! State
-  !style="width: 250px;" colspan="2"| Meaning
+ ! Bound To
-  ! Default
+  ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+  ! Notes
   |-
-  | 13
+  | rowspan="4"| 0x04
-  | Integer
+ | rowspan="4"| Login
-  |colspan="2"| Breed timer?  Set to 32 when something happens, and then counts down to 0 again.  At 29 and 14 (before counting down), will play the <code>entity.panda.cant_breed</code> sound event.
+  | rowspan="4"| Server
- | 0
+  | colspan="2"| Key
+  | colspan="2"| Identifier
+  | The identifier of the cookie.
   |-
-  | 14
+  | colspan="2"| Has Payload
- | Integer
+  | colspan="2"| Boolean
-  |colspan="2"| Sneeze timer.  Counts up from 0; when it hits 1 the <code>entity.panda.pre_sneeze</code> event plays and when it hits 21 the <code>entity.panda.sneeze</code> event plays (and it is set back to 0 and the sneeze flag is cleared).
+  | The payload is only present if the cookie exists on the client.
- | 0
   |-
-  | 15
+  | colspan="2"| Payload Length
- | Integer
+  | colspan="2"| VarInt
-  |colspan="2"| Eat timer.  If nonzero, counts upwards.
+  | Length of the following byte array.
-  | 0
   |-
-  | 16
+  | colspan="2"| Payload
-  | Byte
+  | colspan="2"| Optional Byte Array (5120)
-  |colspan="2"| Main Gene
+ | The data of the cookie, if any.
-  | 0
+  |}
+== Configuration ==
+=== Clientbound ===
+==== Cookie Request (configuration) ====
+Requests a cookie that was previously stored.
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+  ! colspan="2"| Field Type
+ ! Notes
   |-
-  | 17
+  | rowspan="1"| 0x00
-  | Byte
+ | rowspan="1"| Configuration
-  |colspan="2"| Hidden Gene
+ | rowspan="1"| Client
-  | 0
+  | colspan="2"| Key
+  | colspan="2"| Identifier
+  | The identifier of the cookie.
+ |}
+==== Reset Chat ====
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! Field Name
+ ! Field Type
+ ! Notes
   |-
-  |rowspan="6"| 18
+  | 0x06
-  |rowspan="6"| Byte
+ | Configuration
-  ! Bit mask
+ | Client
-  ! Meaning
+ | colspan="3"| ''no fields''
-  |rowspan="6"| 0
+  |}
+==== Registry Data ====
+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>.}}
+{| class="wikitable"
+  ! Packet ID
+ ! State
+  ! Bound To
+  ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
   |-
-  | 0x01
+  | rowspan="6"| 0x07
-  | Unused
+ | rowspan="6"| Configuration
-  |-
+ | rowspan="6"| Client
-  | 0x02
+ |{{removed}} colspan="2"| Registry Codec
-  | Is sneezing
+ |{{removed}} colspan="2"| {{Type|NBT}} (Compound)
-  |-
+ |{{removed}}| See [[Registry Data]].
-  | 0x04
+ |- {{added}}
-  | Is eating
+ | colspan="2"| Registry ID
-  |-
+ | colspan="2"| Identifier
-  | 0x08
+  |
-  | Unknown
+  |- {{added}}
-  |-
+ | colspan="2"| Entry Count
-  | 0x10
+  | colspan="2"| VarInt
-  | Unknown
+  | 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.
   |}
-=== Pillager ===
+==== Store Cookie (configuration) ====
-Extends [[#Abstract Illager|Abstract Illlager]].
+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.
 {| class="wikitable" {{added}}
-  ! Index
+  ! Packet ID
-  ! Type
+  ! State
-  !style="width: 250px;" colspan="2"| Meaning
+ ! Bound To
-  ! Default
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+  ! Notes
+ |-
+ | rowspan="2"| 0x0A
+ | rowspan="2"| Configuration
+ | rowspan="2"| Client
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+  | The identifier of the cookie.
   |-
-  | 13
+  | colspan="2"| Payload
- | Boolean
+  | colspan="2"| ByteArray(5120)
-  | colspan="2"| Using crossbow
+  | The data of the cookie.
-  | false
   |}
-=== Ocelot ===
+==== Transfer (configuration) ====
-Extends {{change|[[#TameableAnimal|TameableAnimal]]|[[#Ageable|Ageable]]}}.
+Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
-{| class="wikitable"
+{| class="wikitable" {{added}}
-  ! Index
+  ! Packet ID
-  ! Type
+  ! State
-  !style="width: 250px;" colspan="2"| Meaning
+ ! Bound To
-  ! Default
+  ! colspan="2"| Field Name
-  |- {{removed}}
+ ! colspan="2"| Field Type
-  | 15
+  ! Notes
-  | VarInt
+  |-
-  |colspan="2"| Type (0 = untamed, 1 = tuxedo, 2 = tabby, 3 = siamese).  Used to render regardless as to whether it is tamed or not.
+  | rowspan="2"| 0x0B
-  | 0
+ | rowspan="2"| Configuration
-  |- {{added}}
+  | rowspan="2"| Client
-  | 13
+  | colspan="2"| Host
- | Boolean
+ | colspan="2"| String
-  |colspan="2"| Is trusting
+  | The hostname of IP of the server.
-  | false
+  |-
+  | colspan="2"| Port
+  | colspan="2"| VarInt
+  | The port of the server.
   |}
+==== Clientbound Known Packs ====
 {| class="wikitable" {{added}}
-  ! Status
+  ! Packet ID
-  !colspan="2"| Description
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+  ! colspan="2"| Field Type
+ ! Notes
   |-
-  | 40
+  | rowspan="4"| 0x0E
-  |colspan="2"| Spawn smoke particles (trust gaining failed)
+ | rowspan="4"| Configuration
+ | rowspan="4"| Client
+  | colspan="2"| Known Pack Count
+ | colspan="2"| VarInt
+ | The number of known packs in the following array.
   |-
-  | 41
+  | rowspan="3"| Known Packs
-  |colspan="2"| Spawn heart particles (trust gaining succeeded)
+ | Namespace
+  | rowspan="3"| Array
+ | String
+ |
+ |-
+ | ID
+ | String
+ |
+ |-
+ | Version
+ | String
+ |
   |}
-=== Cat ===
+=== Serverbound ===
+==== Cookie Response (configuration) ====
-Extends [[#TameableAnimal|TameableAnimal]].
+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.
 {| class="wikitable" {{added}}
-  ! Index
+  ! Packet ID
-  ! Type
+  ! State
-  !style="width: 250px;" colspan="2"| Meaning
+ ! Bound To
-  ! Default
+  ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+  ! Notes
   |-
-  | 15
+  | rowspan="4"| 0x01
-  | VarInt
+ | rowspan="4"| Configuration
-  |colspan="2"| Type (0 = tabby, 1 = black, 2 = red, 3 = siamese, 4 = british_shorthair, 5 = calico, 6 = persian, 7 = ragdoll, 8 = white, 9 = all_black)
+  | rowspan="4"| Server
-  | 1
+  | colspan="2"| Key
+ | colspan="2"| Identifier
+  | The identifier of the cookie.
   |-
-  | 16
+  | colspan="2"| Has Payload
- | Boolean
+  | colspan="2"| Boolean
-  |colspan="2"| Unknown
+  | The payload is only present if the cookie exists on the client.
-  | false
   |-
-  | 17
+  | colspan="2"| Payload Length
- | Boolean
+  | colspan="2"| VarInt
-  |colspan="2"| Unknown
+  | Length of the following byte array.
-  | false
   |-
-  | 18
+  | colspan="2"| Payload
- | VarInt
+  | colspan="2"| Optional Byte Array (5120)
-  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
+  | The data of the cookie, if any.
-  | 14 (Red)
   |}
-== Block Actions ==
+==== Serverbound Known Packs ====
-No changes so far.
+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 ==
@@ Line 330: / Line 725: @@
 === Clientbound ===
-==== Update Block Entity ====
+==== Cookie Request (play) ====
-Sets the block entity associated with the block at the given location.
+Requests a cookie that was previously stored.
-{| class="wikitable"
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
+ |-
+ | rowspan="1"| 0x16
+ | rowspan="1"| Play
+ | rowspan="1"| Client
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+ | The identifier of the cookie.
+ |}
+==== Debug Sample ====
+{| class="wikitable" {{added}}
   ! Packet ID
   ! State
@@ Line 342: / Line 755: @@
   ! Notes
   |-
-  |rowspan="3"| 0x09
+  | rowspan="3"| 0x1B
-  |rowspan="3"| Play
+  | rowspan="3"| Play
-  |rowspan="3"| Client
+  | rowspan="3"| Client
-  | Location
+  | Sample Length
-  | Position
+  | VarInt
-  |
+  | The length of the following array.
   |-
-  | Action
+  | Sample
-  | Unsigned Byte
+  | Long Array
-  | The type of update to perform, see below
+  | TODO: What is the structure of the data in this array?
   |-
-  | NBT Data
+  | Sample Type
-  | [[NBT|NBT Tag]]
+  | VarInt Enum
-  | Data to set.  May be a TAG_END (0), in which case the block entity at the given location is removed (though this is not required since the client will remove the block entity automatically on chunk unload or block removal)
+  | The type of sample data. Currently always 0 (TICK_TIME).
   |}
-''Action'' field:
+==== Login (play) ====
-* '''1''': Set data of a mob spawner (everything except for SpawnPotentials: current delay, min/max delay, mob to be spawned, spawn count, spawn range, etc.)
-* '''2''': Set command block text (command and last execution status)
-* '''3''': Set the level, primary, and secondary powers of a beacon
-* '''4''': Set rotation and skin of mob head
-* '''5''': Declare a conduit
-* '''6''': Set base color and patterns on a banner
-* '''7''': Set the data for a Structure tile entity
-* '''8''': Set the destination for a end gateway
-* '''9''': Set the text on a sign
-* '''10''': Declare a shulker box, no data appears to be sent and the client seems to do fine without this packet. Perhaps it is a leftover from earlier versions?
-* '''11''': Declare a bed
-* '''12''': {{Change||Set data of a jigsaw block}}
-==== Chunk Data ====
-{{Main|Chunk Format}}
-{{See also|#Unload Chunk}}
-The server only sends skylight information for chunk pillars in the {{Minecraft Wiki|Overworld}}, it's up to the client to know in which dimenison the player is currently located. You can also infer this information from the primary bitmask and the amount of uncompressed bytes sent.  This packet also sends all block entities in the chunk (though sending them is not required; it is still legal to send them with [[#Update Block Entity|Update Block Entity]] later).
 {| class="wikitable"
@@ Line 387: / Line 781: @@
   ! Notes
   |-
-  |rowspan="9"| 0x22
+  | rowspan="22"| 0x2B
-  |rowspan="9"| Play
+  | rowspan="22"| Play
-  |rowspan="9"| Client
+  | rowspan="22"| Client
-  | Chunk X
+  | Entity ID
-  | Int
+  | {{Type|Int}}
-  | Chunk coordinate (block coordinate divided by 16, rounded down)
+  | The player's Entity ID (EID).
   |-
-  | Chunk Z
+  | Is hardcore
-  | Int
+  | {{Type|Boolean}}
-  | Chunk coordinate (block coordinate divided by 16, rounded down)
+  |
   |-
-  | Ground-Up Continuous
+  | Dimension Count
-  | Boolean
+ | {{Type|VarInt}}
-  | See [[Chunk Format#Ground-up continuous|Chunk Format]]
+ | 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.
   |-
-  | Primary Bit Mask
+  | Death dimension name
-  | VarInt
+  | {{Type|Optional}} {{Type|Identifier}}
- | Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
+  | Name of the dimension the player died in.
- |- {{Added}}
-  | Heightmaps
- | [[NBT]]
- | Compound containing one long array named <code>MOTION_BLOCKING</code>, which is a heightmap for the highest solid block at each position in the chunk (as a compacted long array with 256 entries at 9 bits per entry).
- |-
- | Size
- | VarInt
- | Size of Data in bytes
   |-
-  | Data
+  | Death location
-  | Byte array
+  | {{Type|Optional}} {{Type|Position}}
-  | See [[Chunk Format#Data structure|data structure]] in Chunk Format
+  | The location that the player died at.
   |-
-  | Number of block entities
+  | Portal cooldown
-  | VarInt
+  | {{Type|VarInt}}
-  | Number of elements in the following array
+  | The number of ticks until the player can use the portal again.
   |-
-  | Block entities
+  | Enforces Secure Chat
-  | Array of [[NBT]]
+  | {{Type|Boolean}}
-  | All block entities in the chunk.  Use the x, y, and z tags in the NBT to determine their positions.
+  |
   |}
-===== Data structure =====
+==== Respawn ====
-The data section of the packet contains most of the useful data for the chunk.
 {| class="wikitable"
-  |-
+  ! Packet ID
+ ! State
+ ! Bound To
   ! Field Name
   ! Field Type
   ! Notes
   |-
-  | Data
+  | rowspan="12"| 0x47
-  | Array of [[#Chunk Section structure|Chunk Section]]
+ | rowspan="12"| Play
-  | The number of elements in the array is equal to the number of bits set in Primary Bit Mask. Sections are sent bottom-to-top, i.e. the first section, if sent, extends from Y=0 to Y=15.
+ | 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.
   |-
-  | Biomes
+  | Data kept
-  | Optional Int Array
+  | {{Type|Byte}}
-  | Only sent if Ground-Up Continuous is true; 256 entries if present
+  | 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.
   |}
-===== Chunk Section structure =====
+==== Store Cookie (play) ====
-A Chunk Section is defined in terms of other [[data types]]. A Chunk Section consists of the following fields:
+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.
-{| class="wikitable"
+{| class="wikitable" {{added}}
-  |-
+  ! Packet ID
-  ! Field Name
+ ! State
-  ! Field Type
+ ! Bound To
+  ! colspan="2"| Field Name
+  ! colspan="2"| Field Type
   ! Notes
- |- {{added}}
- | Block count
- | Short
- | Number of non-air blocks present in the chunk section, for lighting purposes.  "Non-air" is defined as any block other than air, cave air, and void air (in particular, note that fluids such as water are still counted).
   |-
-  | Bits Per Block
+  | rowspan="3"| 0x6B
-  | Unsigned Byte
+ | rowspan="3"| Play
-  | Determines how many bits are used to encode a block. Note that not all numbers are valid here.
+ | rowspan="3"| Client
+  | colspan="2"| Key
+ | colspan="2"| Identifier
+  | The identifier of the cookie.
   |-
-  | Palette
+  | colspan="2"| Payload Length
- | Varies
+  | colspan="2"| VarInt
-  | See below for the format.
+  | Length of the following byte array.
- |-
-  | Data Array Length
- | VarInt
- | Number of longs in the following array
   |-
-  | Data Array
+  | colspan="2"| Payload
- | Array of Long
+  | colspan="2"| Byte Array (5120)
- | Compacted list of 4096 indices pointing to state IDs in the Palette
+  | The data of the cookie.
- |- {{removed}}
- | Block Light
- | Byte Array
-  | Half byte per block
- |- {{removed}}
- | Sky Light
- | Optional Byte Array
-  | Only if in the Overworld; half byte per block
   |}
-Data Array{{change|, Block Light, and Sky Light are|is}} given for each block with increasing x coordinates, within rows of increasing z coordinates, within layers of increasing y coordinates.  {{change|For the half-byte light arrays, even-indexed items (those with an even x coordinate, starting at 0) are packed into the ''low bits'', odd-indexed into the ''high bits''.}}
+==== Transfer (play) ====
-==== Unknown ====
+Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
-{| class="wikitable" {{Added}}
+{| class="wikitable" {{added}}
   ! Packet ID
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="1"| 0x2C
+  | rowspan="2"| 0x73
-  |rowspan="1"| Play
+  | rowspan="2"| Play
-  |rowspan="1"| Client
+  | rowspan="2"| Client
-  | Unknown
+  | colspan="2"| Host
-  | VarInt enum
+ | colspan="2"| String
-  |
+ | The hostname of IP of the server.
+ |-
+ | colspan="2"| Port
+  | colspan="2"| VarInt
+  | The port of the server.
   |}
-==== Entity Sound Effect ====
+==== Update Attributes ====
-Plays a sound effect from an entity.
+Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
 {| class="wikitable"
@@ Line 513: / Line 999: @@
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="5"| 0x4E
+  | rowspan="6"| 0x71
-  |rowspan="5"| Play
+  | rowspan="6"| Play
-  |rowspan="5"| Client
+  | rowspan="6"| Client
-  | Sound ID
+  | 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
-  | ID of hardcoded sound event ([https://pokechu22.github.io/Burger/18w48a.html#sounds events] as of 18w48a)
+  | Number of elements in the following array.
+ |-
+ | Modifiers
+ | Array of Modifier Data
+ | See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
+ |}
+Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
+These changed between 24w03b and 24w13a, TODO: Update this
+{| class="wikitable"
+ |-
+ ! 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.
+ |- {{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.
   |-
-  | Sound Category
+  | 9
-  | VarInt Enum
+  | horse.jump_strength
-  | The category that this sound will be played from ([https://gist.github.com/konwboj/7c0c380d3923443e9d55 current categories])
+ | 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.
   |-
-  | Entity ID
+  | 12
-  | VarInt
+  | generic.max_absorption
-  |
+  | 0.0
+ | 0.0
+ | 2048.0
+ | Max Absorption.
   |-
-  | Volume
+  | 13
-  | Float
+  | generic.max_health
-  | 1.0 is 100%, capped between 0.0 and 1.0 by Notchian clients
+ | 20.0
+  | 1.0
+ | 1024.0
+ | Max Health.
   |-
-  | Pitch
+  | 14
-  | Float
+  | generic.movement_speed
-  | Float between 0.5 and 2.0 by Notchian clients
+ | 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.
   |}
-==== Tags ====
+''Modifier Data'' structure:
 {| class="wikitable"
-  ! Packet ID
+  |-
- ! State
- ! Bound To
   ! Field Name
   ! Field Type
   ! Notes
   |-
-  |rowspan="4"| {{Change|0x55|0x56}}
+  | UUID
- |rowspan="4"| Play
+  | UUID
- |rowspan="4"| Client
+  |
- | Block Tags
-  | (See below)
-  | IDs are block IDs
   |-
-  | Item Tags
+  | Amount
-  | (See below)
+  | Double
-  | IDs are item IDs
+  | May be positive or negative.
   |-
-  | Fluid Tags
+  | Operation
-  | (See below)
+  | Byte
- | IDs are fluid IDs
+  | See below.
- |- {{added}}
- | Entity Tags
-  | (See below)
- | IDs are entity type IDs
   |}
-==== Update Light ====
+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.
-Updates light levels for a chunk.
+==== Entity Effect ====
 {| class="wikitable"
@@ Line 583: / Line 1,212: @@
   ! Notes
   |-
-  |rowspan="8"| 0x57
+  | rowspan="7"| 0x72
-  |rowspan="8"| Play
+  | rowspan="7"| Play
-  |rowspan="8"| Client
+  | rowspan="7"| Client
-  | Chunk X
+  | Entity ID
   | VarInt
-  | Chunk coordinate (block coordinate divided by 16, rounded down)
+  |
   |-
-  | Chunk Z
+  | Effect ID
   | VarInt
-  | Chunk coordinate (block coordinate divided by 16, rounded down)
+  | See {{Minecraft Wiki|Status effect#Effect list|this table}}.
+ |-
+ | Amplifier
+ | Byte
+ | Notchian client displays effect level as Amplifier + 1.
   |-
-  | Sky Light Mask
+  | Duration
   | VarInt
-  | Mask containing 18 bits, with the lowest bit corresponding to chunk section -1 (in the void, y=-16 to y=-1) and the highest bit for chunk section 16 (above the world, y=256 to y=271)
+  | 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
+ |}
+{{Need Info|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 [[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.}}
+{{change|Factor Data|}}
+{| class="wikitable" {{removed}}
+ !Name
+ !Type
+ !style="width: 250px;" colspan="2"| Notes
+ |-
+ | padding_duration
+ | TAG_INT
+ |
+ |-
+ | factor_start
+ | TAG_FLOAT
+ |
   |-
-  | Block Light Mask
+  | factor_target
-  | VarInt
+  | TAG_FLOAT
-  | Mask containing 18 bits, with the same order as sky light
+  |
   |-
-  | Empty Sky Light Mask
+  | factor_current
-  | VarInt
+  | TAG_FLOAT
-  | Mask containing 18 bits, which indicates sections that have 0 for all their sky light values.  If a section is set in both this mask and the main sky light mask, it is ignored for this mask and it is included in the sky light arrays (the notchian server does not create such masks).  If it is only set in this mask, it is not included in the sky light arrays.
+  |
   |-
-  | Empty Block Light Mask
+  | effect_changed_timestamp
-  | VarInt
+  | TAG_INT
- | Mask containing 18 bits, which indicates sections that have 0 for all their block light values.  If a section is set in both this mask and the main block light mask, it is ignored for this mask and it is included in the block light arrays (the notchian server does not create such masks).  If it is only set in this mask, it is not included in the block light arrays.
   |-
-  | Sky Light arrays
+  | factor_previous_frame
-  | Array of arrays of 2048 bytes
+  | TAG_FLOAT
- | There is 1 array for each bit set to true in the sky light mask, starting with the lowest value.  Half a byte per light value.
   |-
-  | Block Light arrays
+  | had_effect_last_tick
-  | Array of arrays of 2048 bytes
+  | TAG_BOOLEAN
- | There is 1 array for each bit set to true in the block light mask, starting with the lowest value.  Half a byte per light value.
   |}
-Individual block or sky light arrays are is given for each block with increasing x coordinates, within rows of increasing z coordinates, within layers of increasing y coordinates. Even-indexed items (those with an even x coordinate, starting at 0) are packed into the low bits, odd-indexed into the high bits.
 === Serverbound ===
-==== Recipe Book Data ====
+==== Chat Command ====
 {| class="wikitable"
@@ Line 629: / Line 1,293: @@
   ! State
   ! Bound To
-  !colspan="2"| Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
+ ! Notes
+ |-
+ | rowspan="8"| 0x04
+ | rowspan="8"| Play
+ | rowspan="8"| Server
+ | colspan="2"| Command
+ | colspan="2"| {{Type|String}} (256)
+ | colspan="2"| The command typed by the client.
+ |- {{removed}}
+ | colspan="2"| Timestamp
+ | colspan="2"| {{Type|Long}}
+ | 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"|
+ |}
+==== Signed Chat Command ====
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="7"| 0x1B
+  | rowspan="8"| 0x05
-  |rowspan="7"| Play
+  | rowspan="8"| Play
-  |rowspan="7"| Server
+  | rowspan="8"| Server
-  |colspan="2"| Type
+  | colspan="2"| Command
-  | VarInt
+  | colspan="2"| String(256)
-  | Determines the format of the rest of the packet
+  | The command typed by the client.
+ |-
+ | colspan="2"| Timestamp
+ | colspan="2"| Long
+ | The timestamp that the command was executed. Milliseconds since the Unix epoch.
   |-
-  ! Type
+  | colspan="2"| Salt
-  ! Field Name
+  | colspan="2"| Long
-  !
+  | The salt for the following argument signatures.
- !
   |-
-  | 0: Displayed Recipe
+  | colspan="2"| Argument Signature Count
-  | Recipe ID
+  | colspan="2"| VarInt
- | Identifier
+  | Number of elements in the following array. The maximum length in Notchian server is 8.
-  | A recipe ID
   |-
-  |rowspan="4"| 1: Recipe Book States
+  | rowspan="2"| Argument Signatures
-  | Crafting Recipe Book Open
+  | Name
-  | Boolean
+  | rowspan="2"| Array
-  | Whether the player has the crafting recipe book currently opened/active.
+ | String(16)
+  | The name of the argument that is signed by the following signature.
   |-
-  | Crafting Recipe Filter Active
+  | Signature
-  | Boolean
+  | ByteArray(256)
-  | Whether the player has the crafting recipe book filter option currently active.
+  | The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
   |-
-  | Smelting Recipe Book Open
+  | colspan="2"| Seen Messages Offset
-  | Boolean
+  | colspan="2"| VarInt
-  | Whether the player has the smelting recipe book currently opened/active.
+  |
   |-
-  | Smelting Recipe Filter Active
+  | colspan="2"| Seen Messages Acknowledged
- | Boolean
+  | colspan="2"| Fixed BitSet(20)
- | Whether the player has the smelting recipe book filter option currently active.
+  |
- |- {{Added}}
-  | Unknown 1
- | Boolean
- | (may actually be above and some of the other things have shifted)
- |- {{Added}}
- | Unknown 2
- | Boolean
- | (may actually be above and some of the other things have shifted)
- |- {{Added}}
- | Unknown 3
- | Boolean
- | (may actually be above and some of the other things have shifted)
-  |- {{Added}}
- | Unknown 4
- | Boolean
- | (may actually be above and some of the other things have shifted)
   |}
-The Recipe Book Status type is sent when one of the states changes.
+==== Cookie Response (play) ====
-== Handshaking ==
+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.
-=== Clientbound ===
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! 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.
+ |}
-There are no clientbound packets in the Handshaking state, since the protocol immediately switches to a different state after the client sends the first packet.
+==== Debug Sample Subscription ====
-=== Serverbound ===
+{| class="wikitable" {{added}}
-==== Handshake ====
-This causes the server to switch into the target state.
-{| class="wikitable"
   ! Packet ID
   ! State
@@ Line 706: / Line 1,426: @@
   ! Notes
   |-
-  |rowspan="4"| 0x00
+  | 0x13
-  |rowspan="4"| Handshaking
+  | Play
-  |rowspan="4"| Server
+  | Server
-  | Protocol Version
+  | Sample Type
- | VarInt
- | See [[protocol version numbers]] (currently {{change|404|451}})
- |-
- | Server Address
- | String
- | Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect.  The Notchian server does not use this information.
- |-
- | Server Port
- | Unsigned Short
- | Default is 25565.  The Notchian server does not use this information.
- |-
- | Next State
   | VarInt Enum
-  | 1 for [[#Status|status]], 2 for [[#Login|login]]
+  | The type of debug sample to subscribe to. Currently always 0 (TICK_TIME).
   |}
-== Status ==
-=== Clientbound ===
-No changes so far.
-=== Serverbound ===
-No changes so far.
-== Login ==
-=== Clientbound ===
-No changes so far.
-=== Serverbound ===
-No changes so far.
 [[Category:Minecraft Modern]]

Difference between revisions of "Pre-release protocol"

Latest revision as of 22:19, 9 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

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