Difference between revisions of "Pre-release protocol"

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(19w08b)
(→‎Entity Metadata: Merge changes from stable docs to incorporate new metadata type templates. Fix my earlier mistake on Pose in the process.)
 
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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|19w08b, protocol 462]]). 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|24w03b, protocol {{Snapshot PVN|1073741996}}]]). 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.
 
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 ===
 
=== Data types ===
  
==== Position ====
+
No changes so far.
 
 
64-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 ===
 
=== Packets ===
Line 41: Line 18:
 
  !colspan="2"| Documentation
 
  !colspan="2"| Documentation
 
  |-
 
  |-
!colspan="4"| Handshaking serverbound
+
!colspan="4"| Handshake serverbound
{{PacketList|0x00|Handshake}}
+
{{PacketList|0x00|Handshake}}
 +
|-
 +
!colspan="4"| Login clientbound
 +
{{PacketList|0x05|Cookie Request (login)|rel=added}}
 +
|-
 +
!colspan="4"| Login serverbound
 +
{{PacketList|0x04|Cookie Response (login)|rel=added}}
 
  |-
 
  |-
!colspan="4"| Play clientbound
+
!colspan="4"| Configuration clientbound
{{PacketList|0x00|Spawn Object}}
+
{{PacketList|0x00|Cookie Request (configuration)|rel=added}}
{{PacketList|0x09|Update Block Entity}}
+
{{PacketList|{{change|0x00|0x01}}|Clientbound Plugin Message (configuration)|pre=unchanged}}
{{PacketList|0x14|Open Horse Window|rel=added}}
+
{{PacketList|{{change|0x01|0x02}}|Disconnect (configuration)|pre=unchanged}}
{{PacketList|0x22|Chunk Data}}
+
{{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
{{PacketList|0x26|Map Data}}
+
{{PacketList|{{change|0x03|0x04}}|Clientbound Keep Alive (configuration)|pre=unchanged}}
{{PacketList|0x2C|Open Book|rel=added}}
+
{{PacketList|{{change|0x04|0x05}}|Ping (configuration)|pre=unchanged}}
{{PacketList|{{change|0x2C|0x2D}}|Open Sign Editor|pre=unchanged}}
+
{{PacketList|{{change|0x05|0x06}}|Registry Data|pre=unchanged}}
{{PacketList|{{change|0x2D|0x2E}}|Craft Recipe Response|pre=unchanged}}
+
{{PacketList|{{change|0x06|0x07}}|Remove Resource Pack (configuration)|pre=unchanged}}
{{PacketList|{{change|0x2E|0x2F}}|Player Abilities (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x07|0x08}}|Add Resource Pack (configuration)|pre=unchanged}}
{{PacketList|{{change|0x2F|0x30}}|Combat Event|pre=unchanged}}
+
{{PacketList|0x09|Store Cookie (configuration)|rel=added}}
{{PacketList|{{change|0x30|0x31}}|Player List Item|pre=unchanged}}
+
{{PacketList|0x0A|Transfer (configuration)|rel=added}}
{{PacketList|{{change|0x31|0x32}}|Face Player|pre=unchanged}}
+
{{PacketList|{{change|0x08|0x0B}}|Feature Flags|pre=unchanged}}
{{PacketList|{{change|0x32|0x33}}|Player Position And Look (clientbound)|pre=unchanged}}
+
{{PacketList|{{change|0x09|0x0C}}|Update Tags (configuration)|pre=unchanged}}
{{PacketList|{{change|0x33}}|Use Bed|pre=removed}}
+
 
{{PacketList|0x4E|Entity Sound Effect|rel=added}}
 
{{PacketList|{{change|0x4E|0x5F}}|Player List Header And Footer|pre=unchanged}}
 
{{PacketList|{{change|0x4F|0x50}}|Collect Item|pre=unchanged}}
 
{{PacketList|{{change|0x50|0x51}}|Entity Teleport|pre=unchanged}}
 
{{PacketList|{{change|0x51|0x52}}|Advancements|pre=unchanged}}
 
{{PacketList|{{change|0x52|0x53}}|Entity Properties|pre=unchanged}}
 
{{PacketList|{{change|0x53|0x54}}|Entity Effect|pre=unchanged}}
 
{{PacketList|{{change|0x54|0x55}}|Declare Recipes}}
 
{{PacketList|{{change|0x55|0x56}}|Tags}}
 
{{PacketList|0x57|Update Light|rel=added}}
 
{{PacketList|{{change|0x14|0x58}}|Open Window}}
 
{{PacketList|0x59|Trade List|rel=added}}
 
 
  |-
 
  |-
!colspan="4"| Play serverbound
+
!colspan="4"| Configuration serverbound
{{PacketList|0x1B|Recipe Book Data}}
+
{{PacketList|0x01|Cookie Response (configuration)|rel=added}}
{{PacketList|0x29|Player Block Placement}}
+
{{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}}
 +
|-
 +
!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|{{change|0x1A|0x1B}}|Delete Message|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x1C}}|Disconnect (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1D}}|Disguised Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x1D|0x1E}}|Entity Event|pre=unchanged}}
 +
{{PacketList|{{change|0x1E|0x1F}}|Explosion|pre=unchanged}}
 +
{{PacketList|{{change|0x1F|0x20}}|Unload Chunk|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x21}}|Game Event|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x22}}|Open Horse Screen|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x23}}|Hurt Animation|pre=unchanged}}
 +
{{PacketList|{{change|0x23|0x24}}|Initialize World Border|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x25}}|Clientbound Keep Alive (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x26}}|Chunk Data and Update Light|pre=unchanged}}
 +
{{PacketList|{{change|0x26|0x27}}|World Event|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x28}}|Particle|pre=unchanged}}
 +
{{PacketList|{{change|0x28|0x29}}|Update Light|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2A}}|Login (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x2A|0x2B}}|Map Data|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2C}}|Merchant Offers|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2D}}|Update Entity Position|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x2E}}|Update Entity Position and Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2E|0x2F}}|Update Entity Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2F|0x30}}|Move Vehicle|pre=unchanged}}
 +
{{PacketList|{{change|0x30|0x31}}|Open Book|pre=unchanged}}
 +
{{PacketList|{{change|0x31|0x32}}|Open Screen|pre=unchanged}}
 +
{{PacketList|{{change|0x32|0x33}}|Open Sign Editor|pre=unchanged}}
 +
{{PacketList|{{change|0x33|0x34}}|Ping (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x34|0x35}}|Ping Response (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x35|0x36}}|Place Ghost Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x36|0x37}}|Player Abilities|pre=unchanged}}
 +
{{PacketList|{{change|0x37|0x38}}|Player Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x38|0x39}}|End Combat|pre=unchanged}}
 +
{{PacketList|{{change|0x39|0x3A}}|Enter Combat|pre=unchanged}}
 +
{{PacketList|{{change|0x3A|0x3B}}|Combat Death|pre=unchanged}}
 +
{{PacketList|{{change|0x3B|0x3C}}|Player Info Remove|pre=unchanged}}
 +
{{PacketList|{{change|0x3C|0x3D}}|Player Info Update|pre=unchanged}}
 +
{{PacketList|{{change|0x3D|0x3E}}|Look At|pre=unchanged}}
 +
{{PacketList|{{change|0x3E|0x3F}}|Synchronize Player Position|pre=unchanged}}
 +
{{PacketList|{{change|0x3F|0x40}}|Update Recipe Book|pre=unchanged}}
 +
{{PacketList|{{change|0x40|0x41}}|Remove Entities|pre=unchanged}}
 +
{{PacketList|{{change|0x41|0x42}}|Remove Entity Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x42|0x43}}|Reset Score|pre=unchanged}}
 +
{{PacketList|{{change|0x43|0x44}}|Remove Resource Pack (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x44|0x45}}|Add Resource Pack (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x45|0x46}}|Respawn|pre=unchanged}}
 +
{{PacketList|{{change|0x46|0x47}}|Set Head Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x47|0x48}}|Update Section Blocks|pre=unchanged}}
 +
{{PacketList|{{change|0x48|0x49}}|Select Advancements Tab|pre=unchanged}}
 +
{{PacketList|{{change|0x49|0x4A}}|Server Data|pre=unchanged}}
 +
{{PacketList|{{change|0x4A|0x4B}}|Set Action Bar Text|pre=unchanged}}
 +
{{PacketList|{{change|0x4B|0x4C}}|Set Border Center|pre=unchanged}}
 +
{{PacketList|{{change|0x4C|0x4D}}|Set Border Lerp Size|pre=unchanged}}
 +
{{PacketList|{{change|0x4D|0x4E}}|Set Border Size|pre=unchanged}}
 +
{{PacketList|{{change|0x4E|0x4F}}|Set Border Warning Delay|pre=unchanged}}
 +
{{PacketList|{{change|0x4F|0x50}}|Set Border Warning Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x50|0x51}}|Set Camera|pre=unchanged}}
 +
{{PacketList|{{change|0x51|0x52}}|Set Held Item|pre=unchanged}}
 +
{{PacketList|{{change|0x52|0x53}}|Set Center Chunk|pre=unchanged}}
 +
{{PacketList|{{change|0x53|0x54}}|Set Render Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x54|0x55}}|Set Default Spawn Position|pre=unchanged}}
 +
{{PacketList|{{change|0x55|0x56}}|Display Objective|pre=unchanged}}
 +
{{PacketList|{{change|0x56|0x57}}|Set Entity Metadata|pre=unchanged}}
 +
{{PacketList|{{change|0x57|0x58}}|Link Entities|pre=unchanged}}
 +
{{PacketList|{{change|0x58|0x59}}|Set Entity Velocity|pre=unchanged}}
 +
{{PacketList|{{change|0x59|0x5A}}|Set Equipment|pre=unchanged}}
 +
{{PacketList|{{change|0x5A|0x5B}}|Set Experience|pre=unchanged}}
 +
{{PacketList|{{change|0x5B|0x5C}}|Set Health|pre=unchanged}}
 +
{{PacketList|{{change|0x5C|0x5D}}|Update Objectives|pre=unchanged}}
 +
{{PacketList|{{change|0x5D|0x5E}}|Set Passengers|pre=unchanged}}
 +
{{PacketList|{{change|0x5E|0x5F}}|Update Teams|pre=unchanged}}
 +
{{PacketList|{{change|0x5F|0x60}}|Update Score|pre=unchanged}}
 +
{{PacketList|{{change|0x60|0x61}}|Set Simulation Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x61|0x62}}|Set Subtitle Text|pre=unchanged}}
 +
{{PacketList|{{change|0x62|0x63}}|Update Time|pre=unchanged}}
 +
{{PacketList|{{change|0x63|0x64}}|Set Title Text|pre=unchanged}}
 +
{{PacketList|{{change|0x64|0x65}}|Set Title Animation Times|pre=unchanged}}
 +
{{PacketList|{{change|0x65|0x66}}|Entity Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x66|0x67}}|Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x67|0x68}}|Start Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x68|0x69}}|Stop Sound|pre=unchanged}}
 +
{{PacketList|0x6A|Store Cookie (Play)|rel=added}}
 +
{{PacketList|{{change|0x69|0x6B}}|System Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x6A|0x6C}}|Set Tab List Header And Footer|pre=unchanged}}
 +
{{PacketList|{{change|0x6B|0x6D}}|Tag Query Response|pre=unchanged}}
 +
{{PacketList|{{change|0x6C|0x6E}}|Pickup Item|pre=unchanged}}
 +
{{PacketList|{{change|0x6D|0x6F}}|Teleport Entity|pre=unchanged}}
 +
{{PacketList|{{change|0x6E|0x70}}|Set Ticking State|pre=unchanged}}
 +
{{PacketList|{{change|0x6F|0x71}}|Step Tick|pre=unchanged}}
 +
{{PacketList|0x72|Transfer (Play)|rel=added}}
 +
{{PacketList|{{change|0x70|0x73}}|Update Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x71|0x74}}|Update Attributes}}
 +
{{PacketList|{{change|0x72|0x75}}|Entity Effect}}
 +
{{PacketList|{{change|0x73|0x76}}|Update Recipes|pre=unchanged}}
 +
{{PacketList|{{change|0x74|0x77}}|Update Tags (play)|pre=unchanged}}
 +
|-
 +
!colspan="4"| Play serverbound
 +
{{PacketList|0x10|Cookie Response (play)|rel=added}}
 +
{{PacketList|{{change|0x10|0x11}}|Serverbound Plugin Message (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x11|0x12}}|Edit Book|pre=unchanged}}
 +
{{PacketList|{{change|0x12|0x13}}|Query Entity Tag|pre=unchanged}}
 +
{{PacketList|{{change|0x13|0x14}}|Interact|pre=unchanged}}
 +
{{PacketList|{{change|0x14|0x15}}|Jigsaw Generate|pre=unchanged}}
 +
{{PacketList|{{change|0x15|0x16}}|Serverbound Keep Alive (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x16|0x17}}|Lock Difficulty|pre=unchanged}}
 +
{{PacketList|{{change|0x17|0x18}}|Set Player Position|pre=unchanged}}
 +
{{PacketList|{{change|0x18|0x19}}|Set Player Position and Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x19|0x1A}}|Set Player Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x1A|0x1B}}|Set Player On Ground|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x1C}}|Move Vehicle|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1D}}|Paddle Boat|pre=unchanged}}
 +
{{PacketList|{{change|0x1D|0x1E}}|Pick Item|pre=unchanged}}
 +
{{PacketList|{{change|0x1E|0x1F}}|Ping Request (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x1F|0x20}}|Place Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x21}}|Player Abilities|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x22}}|Player Action|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x23}}|Player Command|pre=unchanged}}
 +
{{PacketList|{{change|0x23|0x24}}|Player Input|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x25}}|Pong (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x26}}|Change Recipe Book Settings|pre=unchanged}}
 +
{{PacketList|{{change|0x26|0x27}}|Set Seen Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x28}}|Rename Item|pre=unchanged}}
 +
{{PacketList|{{change|0x28|0x29}}|Resource Pack Response (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2A}}|Seen Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x2A|0x2B}}|Select Trade|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2C}}|Set Beacon Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2D}}|Set Held Item|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x2E}}|Program Command Block|pre=unchanged}}
 +
{{PacketList|{{change|0x2E|0x2F}}|Program Command Block Minecart|pre=unchanged}}
 +
{{PacketList|{{change|0x2F|0x30}}|Set Creative Mode Slot|pre=unchanged}}
 +
{{PacketList|{{change|0x30|0x31}}|Program Jigsaw Block|pre=unchanged}}
 +
{{PacketList|{{change|0x31|0x32}}|Program Structure Block|pre=unchanged}}
 +
{{PacketList|{{change|0x32|0x33}}|Update Sign|pre=unchanged}}
 +
{{PacketList|{{change|0x33|0x34}}|Swing Arm|pre=unchanged}}
 +
{{PacketList|{{change|0x34|0x35}}|Teleport To Entity|pre=unchanged}}
 +
{{PacketList|{{change|0x35|0x36}}|Use Item On|pre=unchanged}}
 +
{{PacketList|{{change|0x36|0x37}}|Use Item|pre=unchanged}}
 
  |}
 
  |}
  
Line 83: Line 200:
 
== Entity Metadata ==
 
== Entity Metadata ==
  
=== Entity Metadata Format ===
+
{{#vardefine: meta_prerelease | 1}}
 
 
Note that entity metadata is a totally distinct concept from block metadata.  It is not required to send all metadata fields, or even any metadata fields, so long as the terminating entry is correctly sent.
 
 
 
Entity Metadata is an array of entries, each of which looks like the following:
 
 
 
{| class="wikitable"
 
! Name
 
! Type
 
! Meaning
 
|-
 
| Index
 
| Unsigned Byte
 
| Unique index key determining the meaning of the following value, see the table below. If this is <code>0xff</code> then the it is the end of the Entity Metadata array and no more is read.
 
|-
 
| Type
 
| Optional VarInt Enum
 
| Only if Index is not <code>0xff</code>; the type of the index, see the table below
 
|-
 
| Value
 
| Optional ''value of Type''
 
| Only if Index is not <code>0xff</code>: the value of the metadata field
 
|}
 
  
{| class="wikitable"
+
{{Metadata type definition/begin}}
  ! Value of Type field
+
  ! Value
! [[Data types|Type]] of Value field
 
 
  ! Notes
 
  ! Notes
|-
+
{{Metadata type definition|Byte}}
  | 0
+
  | {{Type|Byte}}
| Byte
 
 
  |
 
  |
|-
+
{{Metadata type definition|VarInt}}
  | 1
+
  | {{Type|VarInt}}
| VarInt
 
 
  |
 
  |
|-
+
{{Metadata type definition|VarLong}}
  | 2
+
  | {{Type|VarLong}}
| Float
 
 
  |
 
  |
|-
+
{{Metadata type definition|Float}}
  | 3
+
  | {{Type|Float}}
| String
 
 
  |
 
  |
|-
+
{{Metadata type definition|String}}
  | 4
+
  | {{Type|String}}
| [[Chat]]
 
 
  |
 
  |
|-
+
{{Metadata type definition|Text Component}}
| 5
+
  | {{Type|Text Component}}
| OptChat (Boolean + Optional [[Chat]])
 
  | [[Chat]] is present if the Boolean is set to true
 
|-
 
| 6
 
| [[Slot]]
 
 
  |
 
  |
  |-
+
{{Metadata type definition|Optional Text Component}}
  | 7
+
  | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Text Component}})
  | Boolean
+
  | Text Component is present if the Boolean is set to true.
 +
{{Metadata type definition|Slot}}
 +
  | {{Type|Slot}}
 
  |
 
  |
|-
+
{{Metadata type definition|Boolean}}
| 8
+
  | {{Type|Boolean}}
| Rotation
 
| 3 floats: rotation on x, rotation on y, rotation on z
 
|-
 
| 9
 
  | [[Data Types#Position|Position]]
 
 
  |
 
  |
|-
+
{{Metadata type definition|Rotations}}
| 10
+
  | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
  | OptPosition (Boolean + Optional Position)
+
  | rotation on x, rotation on y, rotation on z
| Position is present if the Boolean is set to true
+
{{Metadata type definition|Position}}
|-
+
  | {{Type|Position}}
| 11
 
| Direction (VarInt)
 
  | (Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5)
 
|-
 
  | 12
 
| OptUUID (Boolean + Optional UUID)
 
| UUID is present if the Boolean is set to true
 
|-
 
| 13
 
| OptBlockID (VarInt)
 
| 0 for absent otherwise, <code><nowiki>id &lt;&lt; 4 | data</nowiki></code>
 
|-
 
| 14
 
| [[NBT]]
 
 
  |
 
  |
  |-
+
{{Metadata type definition|Optional Position}}
  | 15
+
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|Position}})
  | [[Data Types#Particle|Particle]]
+
| 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}}
 
  |
 
  |
  |- {{Added}}
+
{{Metadata type definition|Particle}}
  | 16
+
  | ({{Type|VarInt}}, Varies)
| Villager Data
+
  | particle type (an ID in the <code>minecraft:particle_type</code> registry), particle data (See [[Particles]].)
  | 3 VarInts: villager type, villager profession, level
+
{{Metadata type definition|Villager Data}}
|- {{Added}}
+
| ({{Type|VarInt}}, {{Type|VarInt}}, {{Type|VarInt}})
  | 17
+
  | villager type, villager profession, level (See below.)
| OptVarInt
+
{{Metadata type definition|Optional VarInt}}
  | 0 for absent; 1 + actual value otherwise. Used for entity IDs.
+
  | {{Type|VarInt}}
|- {{Added}}
+
  | 0 for absent; 1 + actual value otherwise. Used for entity IDs.
  | 18
+
{{Metadata type definition|Pose}}
| Pose
+
  | {{Type|VarInt}} {{Type|Enum}}
  | A VarInt enum: 0: STANDING, 1: FALL_FLYING, 2: SLEEPING, 3: SWIMMING, 4: SPIN_ATTACK, 5: SNEAKING, 6: DYING
+
  | 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}}
Villager type (<code>minecraft:villager_type</code> registry):
+
  | An ID in the <code>minecraft:cat_variant</code> registry.
 
+
{{Metadata type definition|Frog Variant}}
{| class="wikitable"
+
  | {{Type|VarInt}}
! Name !! ID
+
  | An ID in the <code>minecraft:frog_variant</code> registry.
  |-
+
{{Metadata type definition|Optional Global Position}}
  | <code>minecraft:desert</code> || 0
+
  | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Identifier}}, {{Type|Optional}} {{Type|Position}})
|-
+
  | dimension identifier, position; only if the Boolean is set to true.
  | <code>minecraft:jungle</code> || 1
+
{{Metadata type definition|Painting Variant}}
|-
+
  | {{Type|VarInt}}
  | <code>minecraft:plains</code> || 2
+
  | An ID in the <code>minecraft:painting_variant</code> registry.
|-
+
{{Metadata type definition|Sniffer State}}
  | <code>minecraft:savanna</code> || 3
+
  | {{Type|VarInt}} {{Type|Enum}}
|-
+
  | IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
| <code>minecraft:snow</code> || 4
+
{{Metadata type definition|Armadillo State|rel=added}}
  |-
+
  | {{Type|VarInt}} {{Type|Enum}}
| <code>minecraft:swamp</code> || 5
+
  | IDLE = 0, ROLLING = 1, SCARED = 2
  |-
+
{{Metadata type definition|Vector3}}
| <code>minecraft:taiga</code> || 6
+
  | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
  |}
+
  | x, y, z
 
+
{{Metadata type definition|Quaternion}}
Villager professions (<code>minecraft:villager_profession</code> registry):
+
  | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 
+
  | x, y, z, w
{| class="wikitable"
 
! Name !! ID
 
  |-
 
| <code>minecraft:none</code> || 0
 
  |-
 
| <code>minecraft:armorer</code> || 1
 
|-
 
| <code>minecraft:butcher</code> || 2
 
|-
 
| <code>minecraft:cartographer</code> || 3
 
|-
 
| <code>minecraft:cleric</code> || 4
 
|-
 
| <code>minecraft:farmer</code> || 5
 
|-
 
| <code>minecraft:fisherman</code> || 6
 
|-
 
| <code>minecraft:fletcher</code> || 7
 
  |-
 
| <code>minecraft:leatherworker</code> || 8
 
|-
 
| <code>minecraft:librarian</code> || 9
 
|-
 
| <code>minecraft:mason</code> || 10
 
|-
 
| <code>minecraft:nitwit</code> || 11
 
|-
 
| <code>minecraft:shepherd</code> || 12
 
|-
 
| <code>minecraft:toolsmith</code> || 13
 
|-
 
| <code>minecraft:weaponsmith</code> || 14
 
|}
 
 
 
=== Mobs ===
 
 
 
Entity IDs have shifted with the addition of some new mobs.
 
 
 
=== Entity ===
 
 
 
The base class.
 
 
 
{{Warning2|Ids have not been updated to account for the massive shift due to addition of new metadata in classes high up the hierarchy}}
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
  |-
 
|rowspan="9"| 0
 
|rowspan="9"| Byte
 
! Bit mask
 
! Meaning
 
|rowspan="9"| 0
 
|-
 
  | 0x01
 
| On Fire
 
|-
 
| 0x02
 
  | Crouched
 
|-
 
  | 0x04
 
| Unused (previously riding)
 
|-
 
| 0x08
 
| Sprinting
 
|-
 
| 0x10
 
| Swimming
 
|-
 
| 0x20
 
| Invisible
 
|-
 
| 0x40
 
| Glowing effect
 
|-
 
| 0x80
 
| Flying with {{Minecraft Wiki|elytra}}
 
|-
 
| 1
 
| VarInt
 
|colspan="2"| Air
 
| 300
 
|-
 
| 2
 
| OptChat
 
|colspan="2"| Custom name
 
| empty
 
|-
 
| 3
 
| Boolean
 
|colspan="2"| Is custom name visible
 
| false
 
|-
 
| 4
 
| Boolean
 
|colspan="2"| Is silent
 
| false
 
|-
 
| 5
 
| Boolean
 
|colspan="2"| No gravity
 
| false
 
|- {{Added}}
 
  | 6
 
| Pose
 
|colspan="2"| Pose
 
| STANDING
 
 
  |}
 
  |}
  
=== Itemed Throwable ===
+
=== Armadillo ===
 
 
Extends [[#Throwable|Throwable]].
 
 
 
Used for all things that previously extended throwable other than potions, which already had an item.
 
  
 +
{{Metadata inherit|Armadillo|inherits=Animal|start_at=17}}
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
 
  ! Index
 
  ! Index
Line 334: Line 303:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
  | 6
+
  | {{Metadata id|added}}
  | Slot
+
  | {{Metadata type|Armadillo State}}
  |colspan="2"| Item
+
  |colspan="2"| Armadillo State
  | empty (which behaves as if it were a specific item, depending on the subclass)
+
  | IDLE
 
  |}
 
  |}
  
=== Egg ===
+
== Block Actions ==
  
Extends [[#Throwable|Throwable]].
+
No changes so far.
  
No additional metadata.
+
== Inventories ==
  
An empty item behaves as if the item were a <code>minecraft:egg</code>.
+
No changes so far.
  
=== Ender Pearl ===
+
== Plugin Channels ==
  
Extends [[#Throwable|Throwable]].
+
No changes so far.
  
No additional metadata.
+
== Handshake ==
  
An empty item behaves as if the item were a <code>minecraft:ender_pearl</code>.
+
=== Serverbound ===
  
=== Experience Bottle ===
+
==== Handshake ====
  
Extends [[#Throwable|Throwable]].
+
This causes the server to switch into the target state.
 
 
No additional metadata.
 
 
 
<code>minecraft:experience_bottle</code>
 
 
 
=== Snowball ===
 
 
 
Extends [[#Throwable|Throwable]].
 
 
 
No additional metadata.
 
 
 
<code>minecraft:snowball</code>
 
 
 
=== Eye of Ender ===
 
 
 
Extends [[#Entity|Entity]].
 
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 6
 
| Slot
 
|colspan="2"| Item
 
| empty (which behaves as if it were a <code>minecraft:ender_eye</code>)
 
|}
 
 
 
=== Arrow ===
 
 
 
Extends [[#Entity|Entity]].
 
 
 
Abstract base class for [[#TippedArrow|TippedArrow]] (which is used for regular arrows as well as tipped ones) and Spectral Arrow.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! Index
+
  ! Packet ID
  ! Type
+
  ! State
  !style="width: 250px;" colspan="2"| Meaning
+
! Bound To
  ! Default
+
! Field Name
 +
  ! Field Type
 +
  ! Notes
 
  |-
 
  |-
  | rowspan="3" | 6
+
  | rowspan="4"| 0x00
  | rowspan="3" | Byte
+
  | rowspan="4"| Handshaking
  ! Bit mask
+
  | rowspan="4"| Server
  ! Meaning
+
  | Protocol Version
  | rowspan="3" | 0
+
  | [[#Definitions:varint|VarInt]]
 +
| See [[protocol version numbers]] (currently 765 in Minecraft 1.20.4).
 
  |-
 
  |-
  | 0x01
+
  | Server Address
  | Is critical
+
  | [[#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.
 
  |-
 
  |-
  | 0x02
+
  | Server Port
  | Is noclip (used by loyalty tridents when returning)
+
  | [[#Definitions:unsigned-short|Unsigned Short]]
 +
| Default is 25565. The Notchian server does not use this information.
 
  |-
 
  |-
  | 7
+
  | Next State
  | OptUUID
+
  | [[#Definitions:varint|VarInt]] [[#Definitions:enum|Enum]]
|colspan="2"| Shooter UUID
+
  | 1 for [[#Status|Status]], 2 for [[#Login|Login]]{{change||, 3 for [[#Login|Transfer]]}}.
  | Empty
 
|- {{added}}
 
| 8
 
| Byte
 
|colspan="2"| Piercing level
 
| 0
 
 
  |}
 
  |}
  
=== TippedArrow ===
+
== Status ==
  
Extends [[#Arrow|Arrow]].
+
=== Clientbound ===
  
Used for both tipped and regular arrows.  If not tipped, then color is set to -1 and no tipped arrow particles are used.
+
No changes so far.
  
{| class="wikitable"
+
=== Serverbound ===
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| {{change|8|9}}
 
| VarInt
 
|colspan="2"| Color (-1 for no particles)
 
| -1
 
|}
 
  
=== Trident ===
+
No changes so far.
  
Extends [[#Arrow|Arrow]].
+
== Login ==
  
{| class="wikitable"
+
=== Clientbound ===
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| {{change|8|9}}
 
| VarInt
 
|colspan="2"| Loyalty level (enchantment)
 
| 0
 
|}
 
  
=== Itemed Fireball ===
+
==== Cookie Request (login) ====
  
Extends [[#Entity|Entity]].
+
Requests a cookie that was previously stored.
 
 
Used for regular and small fireballs.  Not used for dragon fireballs and wither skulls.  Interestingly, regular fireballs do not come from an item.
 
  
 
{| class="wikitable" {{added}}
 
{| 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
 
  |-
 
  |-
  | 6
+
  | rowspan="1"| 0x05
  | Slot
+
| rowspan="1"| Login
  |colspan="2"| Item
+
| rowspan="1"| Client
  | empty (which behaves as if it were a <code>minecraft:fire_charge</code>)
+
  | colspan="2"| Key
 +
  | colspan="2"| Identifier
 +
  | The identifier of the cookie.
 
  |}
 
  |}
  
=== Fireball ===
+
=== Serverbound ===
 
 
Extends {{change|[[#Abstract Fireball|Abstract Fireball]]|[[#Itemed Fireball|Itemed Fireball]]}}.  This is the large fireball shot by ghasts.
 
 
 
No additional metadata.
 
 
 
=== Small Fireball ===
 
 
 
Extends {{change|[[#Abstract Fireball|Abstract Fireball]]|[[#Itemed Fireball|Itemed Fireball]]}}.  This is the fireball shot by blazes and dispensers with fire charges.
 
 
 
No additional metadata.
 
 
 
=== Fireworks ===
 
 
 
Extends [[#Entity|Entity]].
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 6
 
| [[Slot]]
 
|colspan="2"| Firework info
 
| empty
 
|-
 
| 7
 
| {{Change|VarInt|OptVarInt}}
 
|colspan="2"| Entity ID of entity which used firework (for elytra boosting)
 
| 0
 
|- {{Added}}
 
| 8
 
| Boolean
 
|colspan="2"| Shot at angle (from a crossbow)
 
| false
 
|}
 
  
=== Living ===
+
==== Cookie Response (login) ====
  
Extends [[#Entity|Entity]].
+
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"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
|rowspan="5"| 6
 
|rowspan="5"| Byte
 
|colspan="2"| Hand states, used to trigger blocking/eating/drinking animation.
 
|rowspan="5"| 0
 
|-
 
! Bit mask
 
! Meaning
 
|-
 
| 0x01
 
| Is hand active
 
|-
 
| 0x02
 
| Active hand (0 = main hand, 1 = offhand)
 
|-
 
| 0x04
 
| In riptide spin attack
 
|-
 
| 7
 
| Float
 
|colspan="2"| Health
 
| 1.0
 
|-
 
| 8
 
| VarInt
 
|colspan="2"| Potion effect color (or 0 if there is no effect)
 
| 0
 
|-
 
| 9
 
| Boolean
 
|colspan="2"| Is potion effect ambient: reduces the number of particles generated by potions to 1/5 the normal amount
 
| false
 
|-
 
| 10
 
| VarInt
 
|colspan="2"| Number of arrows in entity
 
| 0
 
|-
 
| 12
 
| OptBlockPos
 
|colspan="2"| Unknown (Bed location?)
 
| Absent
 
|}
 
 
 
=== Ravager ===
 
 
 
Extends [[#Monster|Monster]]
 
 
 
No additional metadata.
 
  
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
  ! Status
+
  ! Packet ID
  !colspan="2"| Description
+
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
  ! colspan="2"| Field Type
 +
! Notes
 
  |-
 
  |-
  | 4
+
  | rowspan="3"| 0x04
  |colspan="2"| Starts the attack animation.
+
| rowspan="3"| Login
 +
| rowspan="3"| Server
 +
  | colspan="2"| Key
 +
| colspan="2"| Identifier
 +
| The identifier of the cookie.
 
  |-
 
  |-
| 39
+
  | colspan="2"| Has Payload
  |colspan="2"| Starts the stun animation.
+
  | colspan="2"| Boolean
  |}
+
  | The payload is only present if the cookie exists on the client.
 
 
=== Panda ===
 
 
 
Extends [[#Animal|Animal]].
 
 
 
{| class="wikitable" {{added}}
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
  |-
 
| 13
 
| Integer
 
|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.
 
| 0
 
|-
 
| 14
 
| Integer
 
|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).
 
| 0
 
|-
 
| 15
 
| Integer
 
|colspan="2"| Eat timer.  If nonzero, counts upwards.
 
| 0
 
|-
 
| 16
 
| Byte
 
|colspan="2"| Main Gene
 
| 0
 
|-
 
| 17
 
| Byte
 
|colspan="2"| Hidden Gene
 
| 0
 
 
  |-
 
  |-
  |rowspan="6"| 18
+
  | colspan="2"| Payload
  |rowspan="6"| Byte
+
  | colspan="2"| Optional ByteArray(5120)
! Bit mask
+
  | The data of the cookie, if any.
! Meaning
 
|rowspan="6"| 0
 
|-
 
| 0x01
 
| Unused
 
|-
 
| 0x02
 
| Is sneezing
 
|-
 
| 0x04
 
| Is eating
 
|-
 
| 0x08
 
| Unknown
 
|-
 
| 0x10
 
  | Unknown
 
 
  |}
 
  |}
  
=== Fox ===
+
== Configuration ==
  
Extends [[#Animal|Animal]].
+
=== Clientbound ===
  
{| class="wikitable" {{added}}
+
==== Cookie Request (configuration) ====
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 13
 
| VarInt
 
| colspan="2" | Type (0: red, 1: snow)
 
| 0 (red)
 
|-
 
| rowspan="9" | 14
 
| rowspan="9" | Byte
 
! Bit mask
 
! Meaning
 
| rowspan="9" | 0
 
|-
 
| 0x01 || Sitting
 
|-
 
| 0x02 || ''Unused''
 
|-
 
| 0x04 || Crouching
 
|-
 
| 0x08 || Unknown
 
|-
 
| 0x10 || Unknown
 
|-
 
| 0x20 || Sleeping
 
|-
 
| 0x40 || Unknown
 
|-
 
| 0x80 || Unknown
 
|-
 
| 15
 
| OptUUID
 
| colspan="2" | First UUID (in <code>UUIDs</code> NBT)?
 
| Absent
 
|-
 
| 16
 
| OptUUID
 
| colspan="2" | Second UUID (in <code>UUIDs</code> NBT)?
 
| Absent
 
|}
 
 
 
=== Mooshroom ===
 
 
 
Extends [[#Cow|Cow]].
 
  
{{change|No additional metadata.}}
+
Requests a cookie that was previously stored.
  
 
{| class="wikitable" {{added}}
 
{| 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="1"| 0x00
  | String
+
| rowspan="1"| Configuration
  | colspan="2"| Variant ("red" or "brown")
+
  | rowspan="1"| Client
  | red
+
  | colspan="2"| Key
 +
| colspan="2"| Identifier
 +
  | The identifier of the cookie.
 
  |}
 
  |}
  
=== 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}}
 
{| 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
| 13
+
  ! Notes
| Boolean
 
| colspan="2"| Using crossbow
 
| false
 
|}
 
 
 
=== Ocelot ===
 
 
 
Extends {{change|[[#TameableAnimal|TameableAnimal]]|[[#Ageable|Ageable]]}}.
 
 
 
{| class="wikitable"
 
! Index
 
! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|- {{removed}}
 
| 15
 
| VarInt
 
|colspan="2"| Type (0 = untamed, 1 = tuxedo, 2 = tabby, 3 = siamese).  Used to render regardless as to whether it is tamed or not.
 
| 0
 
|- {{added}}
 
| 13
 
| Boolean
 
|colspan="2"| Is trusting
 
| false
 
|}
 
 
 
{| class="wikitable" {{added}}
 
  ! Status
 
!colspan="2"| Description
 
 
  |-
 
  |-
  | 40
+
  | rowspan="2"| 0x09
  |colspan="2"| Spawn smoke particles (trust gaining failed)
+
| rowspan="2"| Configuration
 +
| rowspan="2"| Client
 +
| colspan="2"| Key
 +
  | colspan="2"| Identifier
 +
| The identifier of the cookie.
 
  |-
 
  |-
  | 41
+
  | colspan="2"| Payload
  |colspan="2"| Spawn heart particles (trust gaining succeeded)
+
  | colspan="2"| ByteArray(5120)
 +
| The data of the cookie.
 
  |}
 
  |}
  
=== Cat ===
+
==== Transfer (configuration) ====
  
Extends [[#TameableAnimal|TameableAnimal]].
+
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}}
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 15
 
| VarInt
 
|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)
 
| 1
 
|-
 
| 16
 
| Boolean
 
|colspan="2"| Unknown
 
| false
 
|-
 
| 17
 
| Boolean
 
|colspan="2"| Unknown
 
| false
 
|-
 
| 18
 
| VarInt
 
|colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
 
| 14 (Red)
 
|}
 
 
=== Horse ===
 
 
Extends [[#AbstractHorse|AbstractHorse]].
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 15
 
| VarInt
 
|colspan="2"| Variant (Color & Style)
 
| 0
 
|- {{removed}}
 
| 16
 
| VarInt
 
|colspan="2"| Armor (0: none, 1: iron, 2: gold, 3: diamond)
 
| 0 (none)
 
|- {{removed}}
 
| 17
 
| [[Slot]]
 
|colspan="2"| Armor Item (Forge only)
 
| Empty
 
|}
 
 
{{change||Replaced with [[#Entity Equipment|Entity Equipment]] packet. (Uses chestplate slot)}}
 
 
=== Trader Llama ===
 
 
Extends [[#Llama|Llama]].
 
 
No additional metadata.
 
 
=== Villager ===
 
 
Extends [[#Ageable|Ageable]].
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 13
 
| {{change|VarInt|Villager Data}}
 
|colspan="2"| {{Change|Profession (Farmer = 0, Librarian = 1, Priest = 2, Blacksmith = 3, Butcher = 4, Nitwit = 5)|Villager Data}}
 
| {{change|0|Plains/None/1}}
 
|}
 
 
=== Zombie Villager ===
 
 
Extends [[#Zombie|Zombie]].
 
 
{| class="wikitable"
 
! Index
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Default
 
|-
 
| 16
 
| Boolean
 
|colspan="2"| Is converting
 
| false
 
|-
 
| 17
 
| {{Change|VarInt|Villager Data}}
 
|colspan="2"| {{Change|Profession|Villager Data}}
 
| {{change|0|Plains/None/1}}
 
|}
 
 
== Block Actions ==
 
 
No changes so far.
 
 
== Plugin Channels ==
 
 
=== <code>minecraft:book_open</code> ===
 
{{change|''Server to client''}}
 
 
{{change|When a player right clicks with a signed book. This tells the client to open the book GUI.}}
 
 
{{change|The payload is a VarInt enum for the selected hand: 0 for the main hand, 1 for the offhand.}}
 
 
{{change||Replaced with [[#Open Book|Open Book]] packet.}}
 
 
=== <code>minecraft:trader_list</code> ===
 
{{change|''Server to client''}}
 
 
{{change|The list of trades a villager NPC is offering.}}
 
 
{{change||Replaced with [[#Trade List|Trade List]] packet.}}
 
 
== Play ==
 
 
=== Clientbound ===
 
 
==== Spawn Object ====
 
 
Sent by the server when a vehicle or other object is created.
 
 
{| class="wikitable"
 
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="12"| 0x00
+
  | rowspan="2"| 0x0A
  |rowspan="12"| Play
+
  | rowspan="2"| Configuration
  |rowspan="12"| Client
+
  | rowspan="2"| Client
  | Entity ID
+
  | colspan="2"| Host
  | VarInt
+
  | colspan="2"| String
  | EID of the object
+
  | The hostname of IP of the server.
 
  |-
 
  |-
  | Object UUID
+
  | colspan="2"| Port
| UUID
+
  | colspan="2"| VarInt
  |  
+
  | The port of the server.
|-
 
| Type
 
| {{change|Byte|VarInt}}
 
  | The type of object. {{change|(see [[Entities#Objects]])|Uses the same entity type IDs as in Spawn Mob}}
 
|-
 
| X
 
| Double
 
|
 
|-
 
| Y
 
| Double
 
|
 
|-
 
| Z
 
| Double
 
|
 
|-
 
| Pitch
 
| Angle
 
|
 
|-
 
| Yaw
 
| Angle
 
|
 
|-
 
| Data
 
| Int
 
| Meaning dependent on the value of the Type field, see [[Object Data]] for details.
 
|-
 
| Velocity X
 
| Short
 
|rowspan="3"| Same units as [[#Entity Velocity|Entity Velocity]].  Always sent, but only used when Data is greater than 0 (except for some entities which always ignore it; see [[Object Data]] for details).
 
|-
 
| Velocity Y
 
| Short
 
|-
 
| Velocity Z
 
| Short
 
 
  |}
 
  |}
  
==== Update Block Entity ====
+
=== Serverbound ===
 +
 
 +
==== Cookie Response (configuration) ====
  
Sets the block entity associated with the block at the given location.
+
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"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="3"| 0x09
+
  | rowspan="3"| 0x01
  |rowspan="3"| Play
+
  | rowspan="3"| Configuration
  |rowspan="3"| Client
+
  | rowspan="3"| Server
  | Location
+
  | colspan="2"| Key
  | Position
+
  | colspan="2"| Identifier
  |  
+
  | The identifier of the cookie.
 
  |-
 
  |-
  | Action
+
  | colspan="2"| Has Payload
  | Unsigned Byte
+
  | colspan="2"| Boolean
  | The type of update to perform, see below
+
  | The payload is only present if the cookie exists on the client.
 
  |-
 
  |-
  | NBT Data
+
  | colspan="2"| Payload
  | [[NBT|NBT Tag]]
+
  | colspan="2"| Optional ByteArray(5120)
  | 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 data of the cookie, if any.
 
  |}
 
  |}
  
''Action'' field:
+
== 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.)
+
=== Clientbound ===
* '''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''': {{change|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}}
 
* '''13''': {{Change||Set items in a campfire}}
 
  
==== Open Horse Window ====
+
==== Cookie Request (play) ====
  
{{Change||This packet is used exclusively for opening the horse GUI. [[#Open Window|Open Window]] is used for all other GUIs, and now has ID 0x59.}}
+
Requests a cookie that was previously stored.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="3"| 0x14
+
  | rowspan="1"| 0x16
  |rowspan="3"| Play
+
  | rowspan="1"| Play
  |rowspan="3"| Client
+
  | rowspan="1"| Client
  | Window ID?
+
  | colspan="2"| Key
| Byte
+
  | colspan="2"| Identifier
  |
+
  | The identifier of the cookie.
|-
 
  | Number of slots?
 
| VarInt
 
|
 
|-
 
| Entity ID?
 
| Integer
 
|
 
 
  |}
 
  |}
  
==== Chunk Data ====
+
==== Store Cookie (play) ====
{{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).
+
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
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="9"| 0x22
+
  | rowspan="2"| 0x6A
  |rowspan="9"| Play
+
  | rowspan="2"| Play
  |rowspan="9"| Client
+
  | rowspan="2"| Client
  | Chunk X
+
  | colspan="2"| Key
| Int
+
  | colspan="2"| Identifier
  | Chunk coordinate (block coordinate divided by 16, rounded down)
+
  | The identifier of the cookie.
|-
 
| Chunk Z
 
| Int
 
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
|-
 
| Full chunk
 
| Boolean
 
| See [[Chunk Format#Full chunk|Chunk Format]]
 
|-
 
| Primary Bit Mask
 
  | VarInt
 
| 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).
 
|- {{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
+
  | colspan="2"| Payload
| Byte array
+
  | colspan="2"| ByteArray(5120)
  | See [[Chunk Format#Data structure|data structure]] in Chunk Format
+
  | The data of the cookie.
  |-
 
| Number of block entities
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Block entities
 
| Array of [[NBT]]
 
| All block entities in the chunk.  Use the x, y, and z tags in the NBT to determine their positions.
 
 
  |}
 
  |}
  
===== Data structure =====
+
==== Transfer (play) ====
  
The data section of the packet contains most of the useful data for the chunk.
+
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
+
! State
  ! Field Type
+
! Bound To
 +
  ! colspan="2"| Field Name
 +
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | Data
+
  | rowspan="2"| 0x72
  | Array of [[#Chunk Section structure|Chunk Section]]
+
| rowspan="2"| 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="2"| Client
 +
  | colspan="2"| Host
 +
| colspan="2"| String
 +
  | The hostname of IP of the server.
 
  |-
 
  |-
  | Biomes
+
  | colspan="2"| Port
  | Optional Int Array
+
  | colspan="2"| VarInt
  | Only sent if Ground-Up Continuous is true; 256 entries if present
+
  | The port of the server.
 
  |}
 
  |}
  
===== Chunk Section structure =====
+
==== Update Attributes ====
  
A Chunk Section is defined in terms of other [[data types]]. A Chunk Section consists of the following fields:
+
Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
 
 
{| class="wikitable"
 
|-
 
! Field Name
 
! 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
 
| Unsigned Byte
 
| Determines how many bits are used to encode a block. Note that not all numbers are valid here.
 
|-
 
| Palette
 
| Varies
 
| See below for the format.
 
|-
 
| Data Array Length
 
| VarInt
 
| Number of longs in the following array
 
|-
 
| Data Array
 
| Array of Long
 
| Compacted list of 4096 indices pointing to state IDs in the Palette
 
|- {{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''.}}
 
 
 
==== Map Data ====
 
 
 
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,138: Line 603:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  !colspan="2"| Field Name
+
  ! colspan="2"| Field Name
  !colspan="2"| Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="17"| 0x26
+
  | rowspan="6"| 0x71
  |rowspan="17"| Play
+
  | rowspan="6"| Play
  |rowspan="17"| Client
+
  | rowspan="6"| Client
  |colspan="2"| Map ID
+
  | colspan="2"| Entity ID
  |colspan="2"| VarInt
+
  | colspan="2"| VarInt
| Map ID of the map being modified
 
|-
 
|colspan="2"| Scale
 
|colspan="2"| Byte
 
| From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
 
|-
 
|colspan="2"| Tracking Position
 
|colspan="2"| Boolean
 
| Specifies whether player and item frame icons are shown
 
|- {{Added}}
 
|colspan="2"| Locked
 
|colspan="2"| Boolean
 
| True if the map has been locked in a cartography table
 
|-
 
|colspan="2"| Icon Count
 
|colspan="2"| VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="5"| Icon
 
| Type
 
|rowspan="6"| Array
 
| VarInt enum
 
| See below
 
|-
 
| X
 
| Byte
 
| Map coordinates: -128 for furthest left, +127 for furthest right
 
|-
 
| Z
 
| Byte
 
| Map coordinates: -128 for highest, +127 for lowest
 
|-
 
| Direction
 
| Byte
 
| 0-15
 
|-
 
| Has Display Name
 
| Boolean
 
 
  |
 
  |
 
  |-
 
  |-
| Display Name
+
  | colspan="2"| Number Of Properties
| Optional [[Chat]]
+
  | colspan="2"| VarInt
| Only present if previous Boolean is true
+
  | Number of elements in the following array.
|-
 
  |colspan="2"| Columns
 
  |colspan="2"| Byte
 
  | Number of columns updated
 
 
  |-
 
  |-
  |colspan="2"| Rows
+
  | rowspan="4"| Property
  |colspan="2"| Optional Byte
+
  | {{change|Key|Id}}
  | Only if Columns is more than 0; number of rows updated
+
| rowspan="4"| Array
 +
| {{change|Identifier|VarInt Enum}}
 +
  | See below.
 
  |-
 
  |-
  |colspan="2"| X
+
  | Value
  |colspan="2"| Optional Byte
+
  | Double
  | Only if Columns is more than 0; x offset of the westernmost column
+
  | See below.
 
  |-
 
  |-
  |colspan="2"| Z
+
  | Number Of Modifiers
|colspan="2"| Optional Byte
+
  | VarInt
| Only if Columns is more than 0; z offset of the northernmost row
+
  | Number of elements in the following array.
  |-
 
|colspan="2"| Length
 
|colspan="2"| Optional VarInt
 
  | Only if Columns is more than 0; length of the following array
 
 
  |-
 
  |-
  |colspan="2"| Data
+
  | Modifiers
  |colspan="2"| Optional Array of Unsigned Byte
+
  | Array of Modifier Data
  | Only if Columns is more than 0; see {{Minecraft Wiki|Map item format}}
+
  | See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
 
  |}
 
  |}
  
For icons, a direction of 0 is a vertical icon and increments by 22.5&deg; (360/16).
+
Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
 
 
Types are based off of rows and columns in <code>map_icons.png</code>:
 
  
 
{| class="wikitable"
 
{| class="wikitable"
 
  |-
 
  |-
  ! Icon type
+
  ! Id
  ! Result
+
  ! Key
 +
! Default
 +
! Min
 +
! Max
 +
! Label
 
  |-
 
  |-
 
  | 0
 
  | 0
  | White arrow (players)
+
  | generic.armor
 +
| 0.0
 +
| 0.0
 +
| 30.0
 +
| Armor.
 
  |-
 
  |-
 
  | 1
 
  | 1
  | Green arrow (item frames)
+
  | generic.armor_toughness
 +
| 0.0
 +
| 0.0
 +
| 20.0
 +
| Armor Toughness.
 
  |-
 
  |-
 
  | 2
 
  | 2
  | Red arrow
+
  | generic.attack_damage
 +
| 2.0
 +
| 0.0
 +
| 2048.0
 +
| Attack Damage.
 
  |-
 
  |-
 
  | 3
 
  | 3
  | Blue arrow
+
  | generic.attack_knockback
 +
| 0.0
 +
| 0.0
 +
| 5.0
 +
| Attack Knockback.
 
  |-
 
  |-
 
  | 4
 
  | 4
  | White cross
+
  | generic.attack_speed
  |-
+
| 4.0
 +
| 0.0
 +
| 1024.0
 +
| Attack Speed.
 +
  |- {{added}}
 
  | 5
 
  | 5
  | Red pointer
+
  | generic.block_interaction_range
  |-
+
| 4.5
 +
| 0.0
 +
| 64.0
 +
| Block Interaction Range.
 +
  |- {{added}}
 
  | 6
 
  | 6
  | White circle (off-map players)
+
  | generic.entity_interaction_range
 +
| 3.0
 +
| 0.0
 +
| 64.0
 +
| Entity Interaction Range.
 
  |-
 
  |-
 
  | 7
 
  | 7
  | Small white circle (far-off-map players)
+
  | generic.flying_speed
 +
| 0.4
 +
| 0.0
 +
| 1024.0
 +
| Flying Speed.
 
  |-
 
  |-
 
  | 8
 
  | 8
  | Mansion
+
  | generic.follow_range
 +
| 32.0
 +
| 0.0
 +
| 2048.0
 +
| Follow Range.
 
  |-
 
  |-
 
  | 9
 
  | 9
  | Temple
+
  | horse.jump_strength
 +
| 0.7
 +
| 0.0
 +
| 2.0
 +
| Jump Strength.
 
  |-
 
  |-
 
  | 10
 
  | 10
  | White Banner
+
  | generic.knockback_resistance
 +
| 0.0
 +
| 0.0
 +
| 1.0
 +
| Knockback Resistance.
 
  |-
 
  |-
 
  | 11
 
  | 11
  | Orange Banner
+
  | generic.luck
 +
| 0.0
 +
| -1024.0
 +
| 1024.0
 +
| Luck.
 
  |-
 
  |-
 
  | 12
 
  | 12
  | Magenta Banner
+
  | generic.max_absorption
 +
| 0.0
 +
| 0.0
 +
| 2048.0
 +
| Max Absorption.
 
  |-
 
  |-
 
  | 13
 
  | 13
  | Light Blue Banner
+
  | generic.max_health
 +
| 20.0
 +
| 1.0
 +
| 1024.0
 +
| Max Health.
 
  |-
 
  |-
 
  | 14
 
  | 14
  | Yellow Banner
+
  | generic.movement_speed
  |-
+
| 0.7
 +
| 0.0
 +
| 1024.0
 +
| Movement Speed.
 +
  |- {{added}}
 
  | 15
 
  | 15
  | Lime Banner
+
  | generic.scale
 +
| 1.0
 +
| 0.0625
 +
| 16.0
 +
| Scale.
 
  |-
 
  |-
 
  | 16
 
  | 16
  | Pink Banner
+
  | zombie.spawn_reinforcements
  |-
+
| 0.0
 +
| 0.0
 +
| 1.0
 +
| Spawn Reinforcements Chance.
 +
  |- {{added}}
 
  | 17
 
  | 17
  | Gray Banner
+
  | generic.step_height
  |-
+
  | 0.6
  | 18
+
  | 0.0
  | Light Gray Banner
+
  | 10.0
  |-
+
  | Step Height.
| 19
 
| Cyan Banner
 
|-
 
| 20
 
| Purple Banner
 
|-
 
| 21
 
| Blue Banner
 
|-
 
| 22
 
| Brown Banner
 
|-
 
| 23
 
| Green Banner
 
|-
 
| 24
 
| Red Banner
 
|-
 
| 25
 
| Black Banner
 
|-
 
| 26
 
| Treasure marker
 
 
  |}
 
  |}
  
==== Open Book ====
+
''Modifier Data'' structure:
  
Sent when a player right clicks with a signed book. This tells the client to open the book GUI.
+
{| class="wikitable"
 
 
{| class="wikitable" {{Added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
|rowspan="1"| 0x2C
 
|rowspan="1"| Play
 
|rowspan="1"| Client
 
| Hand
 
| VarInt enum
 
| 0: Main hand, 1: Off hand
 
|}
 
 
==== Use Bed ====
 
 
{{change|This packet tells that a player goes to bed.}}
 
 
{{change|The client with the matching Entity ID will go into bed mode.}}
 
 
{{change|This Packet is sent to all nearby players including the one sent to bed.}}
 
 
{{change|Any packets sent with a location not currently occupied by a bed will be ignored by clients.}}
 
 
{| class="wikitable" {{removed}}
 
! Packet ID
 
! State
 
! Bound To
 
 
  ! Field Name
 
  ! Field Name
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="2"| 0x33
+
  | UUID
|rowspan="2"| Play
+
  | UUID
|rowspan="2"| Client
 
| Entity ID
 
| VarInt
 
| Sleeping player's EID
 
|-
 
| Location
 
| Position
 
| Block location of the head part of the bed
 
|}
 
 
 
==== Entity Sound Effect ====
 
 
 
Plays a sound effect from an entity.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="5"| 0x4F
 
|rowspan="5"| Play
 
|rowspan="5"| Client
 
| Sound ID
 
| VarInt
 
| ID of hardcoded sound event ([https://pokechu22.github.io/Burger/18w48a.html#sounds events] as of 18w48a)
 
|-
 
| Sound Category
 
| VarInt Enum
 
| The category that this sound will be played from ([https://gist.github.com/konwboj/7c0c380d3923443e9d55 current categories])
 
|-
 
| Entity ID
 
  | VarInt
 
 
  |
 
  |
 
  |-
 
  |-
  | Volume
+
  | Amount
  | Float
+
  | Double
  | 1.0 is 100%, capped between 0.0 and 1.0 by Notchian clients
+
  | May be positive or negative.
 
  |-
 
  |-
  | Pitch
+
  | Operation
  | Float
+
  | Byte
  | Float between 0.5 and 2.0 by Notchian clients
+
  | See below.
|}
 
 
 
==== Declare Recipes ====
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="5"| {{Change|0x54|0x55}}
 
|rowspan="5"| Play
 
|rowspan="5"| Client
 
|colspan="2"| Num Recipes
 
|colspan="2"| VarInt
 
| Number of elements in the following array
 
|-
 
|rowspan="4"| Recipe
 
|{{removed}}| Recipe ID
 
|rowspan="4"| Array
 
|{{removed}}| Identifier
 
|{{removed}}|
 
|-
 
| Type
 
| {{Change|String|Identifier}}
 
| The recipe serializer, see below
 
|- {{Added}}
 
| Recipe ID
 
| Identifier
 
|
 
|-
 
| Data
 
| Optional, varies
 
| Additional data for the recipe.  For some types, there will be no data.
 
 
  |}
 
  |}
  
Recipe serializers:
+
The operation controls how the base value of the modifier is changed.
  
{| class="wikitable"
+
* 0: Add/subtract amount
! Serializer
+
* 1: Add/subtract amount percent of the current value
! Description
+
* 2: Multiply by amount percent
! Data
 
|-
 
| <code>{{change||minecraft:}}crafting_shapeless</code>
 
| Shapeless crafting recipe.  All items in the ingredient list must be present, but in any order/slot.
 
| As follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book.  Tag is present in recipe JSON.
 
    |-
 
    | Ingredient count
 
    | VarInt
 
    | Number of elements in the following array
 
    |-
 
    | Ingredients
 
    | Array of Ingredient
 
    |
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |}
 
|-
 
| <code>{{change||minecraft:}}crafting_shaped</code>
 
| Shaped crafting recipe.  All items must be present in the same pattern (which may be flipped horizontally or translated)
 
| As follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Width
 
    | VarInt
 
    |
 
    |-
 
    | Height
 
    | VarInt
 
    |
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book.  Tag is present in recipe JSON.
 
    |-
 
    | Ingredients
 
    | Array of Ingredient
 
    | Length is width * height.  Indexed by x + (y * width).
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |}
 
|-
 
| <code>{{change||minecraft:}}crafting_special_armordye</code>
 
| Recipe for dying leather armor
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_bookcloning</code>
 
| Recipe for copying contents of written books
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_mapcloning</code>
 
| Recipe for copying maps
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_mapextending</code>
 
| Recipe for adding paper to maps
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_firework_rocket</code>
 
| Recipe for making firework rockets
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_firework_star</code>
 
| Recipe for making firework stars
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_firework_star_fade</code>
 
| Recipe for making firework stars fade between multiple colors
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_repairitem</code>
 
| Recipe for repairing items via crafting
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_tippedarrow</code>
 
| Recipe for crafting tipped arrows
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_bannerduplicate</code>
 
| Recipe for copying banner patterns
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_banneraddpattern</code>
 
| Recipe for adding patterns to banners
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_shielddecoration</code>
 
| Recipe for applying a banner's pattern to a shield
 
| None
 
|-
 
| <code>{{change||minecraft:}}crafting_special_shulkerboxcoloring</code>
 
| Recipe for recoloring a shulker box
 
| None
 
|- {{Added}}
 
| <code>minecraft:crafting_special_suspiciousstew</code>
 
| Recipe for crafting suspicious stew with various affects.
 
| None
 
|-
 
| <code>{{change||minecraft:}}smelting</code>
 
| Smelting recipe
 
|rowspan="4"| All of these have the same format, as follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book.
 
    |-
 
    | Ingredient
 
    | Ingredient
 
    |
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |-
 
    | Experience
 
    | Float
 
    |
 
    |-
 
    | Cooking time
 
    | VarInt
 
    |
 
    |}
 
|- {{Added}}
 
| <code>minecraft:blasting</code>
 
| Recipes in a blast furnace.
 
|- {{Added}}
 
| <code>minecraft:smoking</code>
 
| Recipes in a smoker.
 
|- {{Added}}
 
| <code>minecraft:campfire_cooking</code>
 
| Recipes in a campfire.
 
|}
 
 
 
Ingredient is defined as:
 
  
{| class="wikitable"
+
All of the 0's are applied first, and then the 1's, and then the 2's.
! Name
 
! Type
 
! Description
 
|-
 
| Count
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Items
 
| Array of [[Slot]]
 
| Any item in this array may be used for the recipe.  The count of each item should be 1.
 
|}
 
  
==== Tags ====
+
==== Entity Effect ====
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,611: Line 814:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| {{change|0x55|0x56}}
+
  | rowspan="7"| 0x72
  |rowspan="4"| Play
+
  | rowspan="7"| Play
  |rowspan="4"| Client
+
  | rowspan="7"| Client
| Block Tags
+
  | Entity ID
| (See below)
 
| IDs are block IDs
 
|-
 
| Item Tags
 
| (See below)
 
| IDs are item IDs
 
|-
 
| Fluid Tags
 
| (See below)
 
| IDs are fluid IDs
 
|- {{added}}
 
  | Entity Tags
 
| (See below)
 
| IDs are entity type IDs
 
|}
 
 
 
==== Update Light ====
 
 
 
Updates light levels for a chunk.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="8"| 0x57
 
|rowspan="8"| Play
 
|rowspan="8"| Client
 
| Chunk X
 
 
  | VarInt
 
  | VarInt
  | Chunk coordinate (block coordinate divided by 16, rounded down)
+
  |
 
  |-
 
  |-
  | Chunk Z
+
  | Effect ID
 
  | VarInt
 
  | VarInt
  | Chunk coordinate (block coordinate divided by 16, rounded down)
+
  | See {{Minecraft Wiki|Status effect#Effect list|this table}}.
 
  |-
 
  |-
  | Sky Light Mask
+
  | Amplifier
  | VarInt
+
  | Byte
  | 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)
+
  | Notchian client displays effect level as Amplifier + 1.
 
  |-
 
  |-
  | Block Light Mask
+
  | Duration
 
  | VarInt
 
  | VarInt
  | Mask containing 18 bits, with the same order as sky light
+
  | Duration in ticks. (-1 for infinite)
 
  |-
 
  |-
  | Empty Sky Light Mask
+
  | Flags
  | VarInt
+
  | Byte
| 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.
+
  | Bit field, see below.
|-
 
| Empty Block Light Mask
 
| VarInt
 
| 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
 
| Array of arrays of 2048 bytes
 
| 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
 
| Array of arrays of 2048 bytes
 
| 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.
 
 
 
==== Open Window ====
 
 
 
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.  {{change||For horses, use [[#Open Horse Window|Open Horse Window]]}}
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="5"| {{change|0x14|0x58}}
 
|rowspan="5"| Play
 
|rowspan="5"| Client
 
| Window ID
 
| {{change|Unsigned Byte|VarInt}}
 
  | A unique id number for the window to be displayed. Notchian server implementation is a counter, starting at 1.
 
|-
 
| Window Type
 
| {{change|String (32)|VarInt}}
 
| The window type to use for display. {{change|See [[Inventory]] for a list|contained in the <code>minecraft:menu</code> regisry}}.
 
|-
 
| Window Title
 
| [[Chat]]
 
| The title of the window
 
 
  |- {{removed}}
 
  |- {{removed}}
  | Number Of Slots
+
  | Has Factor Data
  | Unsigned Byte
+
  | Boolean
  | Number of slots in the window (excluding the number of slots in the player inventory). Always 0 for non-storage windows (e.g. Workbench, Anvil).
+
  | Used in DARKNESS effect
 
  |- {{removed}}
 
  |- {{removed}}
  | Entity ID
+
  | Factor Codec
  | Optional Int
+
  | NBT Tag
  | EntityHorse's EID. Only sent when Window Type is “EntityHorse”
+
  | See below
 
  |}
 
  |}
  
==== Trade List ====
+
{{Need Info|What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?}}
  
The list of trades a villager NPC is offering.
+
Within flags:
  
{| class="wikitable"
+
* 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.
! Packet ID
+
* 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.
! State
+
* 0x04: Show icon - should the icon be displayed on the client?  Usually should be enabled.
! Bound To
+
* {{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.}}
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
|-
 
|rowspan="10"| 0x59
 
  |rowspan="10"| Play
 
|rowspan="10"| Client
 
|-
 
  | colspan="2" | Window ID
 
| colspan="2" | VarInt
 
| The ID of the window that is open; this is an int rather than a byte.
 
  |-
 
| colspan="2" | Size
 
| colspan="2" | Byte
 
| The number of trades in the following array
 
|-
 
| rowspan="7" | Trades
 
| Input item 1
 
| rowspan="7" | Array
 
| [[Slot]]
 
  | The first item the villager is buying
 
|-
 
  | Output item
 
| [[Slot]]
 
| The item the villager is selling
 
  |-
 
| Has second item
 
| Boolean
 
| Whether there is a second item
 
|-
 
| Input item 2
 
| Optional [[Slot]]
 
| The second item the villager is buying; only present if they have a second item.
 
|-
 
| Trade disabled
 
| Boolean
 
| True if the trade is disabled; false if the trade is enabled.
 
|-
 
| Number of trade uses
 
| Integer
 
| Number of times the trade has been used so far
 
|-
 
  | Maximum number of trade uses
 
| Integer
 
| Number of times this trade can be used
 
|}
 
  
=== Serverbound ===
+
{{change|Factor Data|}}
 
+
{| class="wikitable" {{removed}}
==== Recipe Book Data ====
+
  !Name
 
+
  !Type
{| class="wikitable"
+
  !style="width: 250px;" colspan="2"| Notes
  ! Packet ID
 
  ! State
 
! Bound To
 
  !colspan="2"| Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="11"| 0x1B
+
  | padding_duration
|rowspan="11"| Play
+
  | TAG_INT
|rowspan="11"| Server
+
  |
|colspan="2"| Type
 
  | VarInt
 
  | Determines the format of the rest of the packet
 
 
  |-
 
  |-
  ! Type
+
  | factor_start
  ! Field Name
+
  | TAG_FLOAT
  !
+
  |
!
 
 
  |-
 
  |-
  | 0: Displayed Recipe
+
  | factor_target
  | Recipe ID
+
  | TAG_FLOAT
  | Identifier
+
  |
| A recipe ID
 
|-
 
|rowspan="8"| 1: Recipe Book States
 
| Crafting Recipe Book Open
 
| Boolean
 
| Whether the player has the crafting recipe book currently opened/active.
 
|-
 
| Crafting Recipe Filter Active
 
| Boolean
 
| Whether the player has the crafting recipe book filter option currently active.
 
|-
 
| Smelting Recipe Book Open
 
| Boolean
 
| Whether the player has the smelting recipe book currently opened/active.
 
 
  |-
 
  |-
  | Smelting Recipe Filter Active
+
  | factor_current
  | Boolean
+
  | TAG_FLOAT
| Whether the player has the smelting recipe book filter option currently active.
 
|- {{Added}}
 
| Blasting Recipe Book Open
 
| Boolean
 
| May be swapped with smoking recipe book.  Also, the notchian client appears to use the same value for both of those books currently.
 
|- {{Added}}
 
| Blasting Recipe Filter Active
 
| Boolean
 
| May be swapped with smoking recipe book.  Also, the notchian client appears to use the same value for both of those books currently.
 
|- {{Added}}
 
| Smoking Recipe Book Open
 
| Boolean
 
|
 
|- {{Added}}
 
| Smoking Recipe Filter Active
 
| Boolean
 
 
  |
 
  |
|}
 
 
The Recipe Book Status type is sent when one of the states changes.
 
 
==== Player Block Placement ====
 
 
{| class="wikitable"
 
|-
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="9"| 0x29
+
  | effect_changed_timestamp
|rowspan="9"| Play
+
  | TAG_INT
|rowspan="9"| Server
 
|{{removed}}| Location
 
  |{{removed}}| Position
 
|{{removed}}| Block position
 
|- {{removed}}
 
| Face
 
| VarInt Enum
 
| The face on which the block is placed (as documented at [[#Player Digging|Player Digging]])
 
 
  |-
 
  |-
  | Hand
+
  | factor_previous_frame
  | VarInt Enum
+
  | TAG_FLOAT
| The hand from which the block is placed; 0: main hand, 1: off hand
 
|- {{added}}
 
| Location
 
| Position
 
| Block position
 
|- {{added}}
 
| Face
 
| VarInt Enum
 
| The face on which the block is placed (as documented at [[#Player Digging|Player Digging]])
 
 
  |-
 
  |-
  | Cursor Position X
+
  | had_effect_last_tick
  | Float
+
  | TAG_BOOLEAN
| The position of the crosshair on the block, from 0 to 1 increasing from west to east
 
|-
 
| Cursor Position Y
 
| Float
 
| The position of the crosshair on the block, from 0 to 1 increasing from bottom to top
 
|-
 
| Cursor Position Z
 
| Float
 
| The position of the crosshair on the block, from 0 to 1 increasing from north to south
 
|- {{added}}
 
| Inside block
 
| Boolean
 
| True when the player's head is inside of a block.
 
 
  |}
 
  |}
 
Upon placing a block, this packet is sent once.
 
 
The Cursor Position X/Y/Z fields (also known as in-block coordinates) are calculated using raytracing. The unit corresponds to sixteen pixel in the default resource pack. For example, let's say a slab is being placed against the south face of a full block. The Cursor Position X will be higher if the player was pointing near the right (east) edge of the face, lower if pointing near the left. The Cursor Position Y will be used to determine whether it will appear as a bottom slab (values 0.0–0.5) or as a top slab (values 0.5-1.0). The Cursor Position Z should be 1.0 since the player was looking at the southernmost part of the block.
 
 
{{Change||Inside block is true when a player's head (specifically eyes) are inside of a block's collision.  In 1.13 and later versions, collision is rather complicated and individual blocks can have multiple collision boxes.  For instance, a ring of vines has a non-colliding hole in the middle.  This value is only true when the player is directly in the box.  In practice, though, this value is only used by scaffolding to place in front of the player when sneaking inside of it (other blocks will place behind when you intersect with them -- try with glass for instance).}}
 
 
== Handshaking ==
 
 
=== Clientbound ===
 
 
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.
 
  
 
=== Serverbound ===
 
=== Serverbound ===
  
==== Handshake ====
+
==== Cookie Response (play) ====
  
This causes the server to switch into the target state.
+
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.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| 0x00
+
  | rowspan="3"| 0x6A
  |rowspan="4"| Handshaking
+
  | rowspan="3"| Play
  |rowspan="4"| Server
+
  | rowspan="3"| Server
  | Protocol Version
+
  | colspan="2"| Key
  | VarInt
+
  | colspan="2"| Identifier
  | See [[protocol version numbers]] (currently {{change|404|462}})
+
  | The identifier of the cookie.
 
  |-
 
  |-
  | Server Address
+
  | colspan="2"| Has Payload
| String
+
  | colspan="2"| Boolean
  | Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect.  The Notchian server does not use this information.
+
  | The payload is only present if the cookie exists on the client.
|-
 
  | Server Port
 
| Unsigned Short
 
| Default is 25565.  The Notchian server does not use this information.
 
 
  |-
 
  |-
  | Next State
+
  | colspan="2"| Payload
  | VarInt Enum
+
  | colspan="2"| Optional ByteArray(5120)
  | 1 for [[#Status|status]], 2 for [[#Login|login]]
+
  | The data of the cookie, if any.
 
  |}
 
  |}
 
== 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]]
 
[[Category:Minecraft Modern]]

Latest revision as of 05:25, 26 February 2024

This page documents the changes from the last stable Minecraft release (currently 1.20.4, protocol 765) to the current pre-release (currently 24w03b, protocol Snapshot 172). 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.

Contents

Data types

No changes so far.

Packets

ID Packet name Documentation
Handshake serverbound
0x00 Handshake Current Pre
Login clientbound
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)
0x05 0x06 Registry Data Current (unchanged)
0x06 0x07 Remove Resource Pack (configuration) Current (unchanged)
0x07 0x08 Add Resource Pack (configuration) Current (unchanged)
0x09 Store Cookie (configuration) Pre
0x0A Transfer (configuration) Pre
0x08 0x0B Feature Flags Current (unchanged)
0x09 0x0C Update Tags (configuration) Current (unchanged)
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)
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)
0x1A 0x1B Delete Message Current (unchanged)
0x1B 0x1C Disconnect (play) Current (unchanged)
0x1C 0x1D Disguised Chat Message Current (unchanged)
0x1D 0x1E Entity Event Current (unchanged)
0x1E 0x1F Explosion Current (unchanged)
0x1F 0x20 Unload Chunk Current (unchanged)
0x20 0x21 Game Event Current (unchanged)
0x21 0x22 Open Horse Screen Current (unchanged)
0x22 0x23 Hurt Animation Current (unchanged)
0x23 0x24 Initialize World Border Current (unchanged)
0x24 0x25 Clientbound Keep Alive (play) Current (unchanged)
0x25 0x26 Chunk Data and Update Light Current (unchanged)
0x26 0x27 World Event Current (unchanged)
0x27 0x28 Particle Current (unchanged)
0x28 0x29 Update Light Current (unchanged)
0x29 0x2A Login (play) Current (unchanged)
0x2A 0x2B Map Data Current (unchanged)
0x2B 0x2C Merchant Offers Current (unchanged)
0x2C 0x2D Update Entity Position Current (unchanged)
0x2D 0x2E Update Entity Position and Rotation Current (unchanged)
0x2E 0x2F Update Entity Rotation Current (unchanged)
0x2F 0x30 Move Vehicle Current (unchanged)
0x30 0x31 Open Book Current (unchanged)
0x31 0x32 Open Screen Current (unchanged)
0x32 0x33 Open Sign Editor Current (unchanged)
0x33 0x34 Ping (play) Current (unchanged)
0x34 0x35 Ping Response (play) Current (unchanged)
0x35 0x36 Place Ghost Recipe Current (unchanged)
0x36 0x37 Player Abilities Current (unchanged)
0x37 0x38 Player Chat Message Current (unchanged)
0x38 0x39 End Combat Current (unchanged)
0x39 0x3A Enter Combat Current (unchanged)
0x3A 0x3B Combat Death Current (unchanged)
0x3B 0x3C Player Info Remove Current (unchanged)
0x3C 0x3D Player Info Update Current (unchanged)
0x3D 0x3E Look At Current (unchanged)
0x3E 0x3F Synchronize Player Position Current (unchanged)
0x3F 0x40 Update Recipe Book Current (unchanged)
0x40 0x41 Remove Entities Current (unchanged)
0x41 0x42 Remove Entity Effect Current (unchanged)
0x42 0x43 Reset Score Current (unchanged)
0x43 0x44 Remove Resource Pack (play) Current (unchanged)
0x44 0x45 Add Resource Pack (play) Current (unchanged)
0x45 0x46 Respawn Current (unchanged)
0x46 0x47 Set Head Rotation Current (unchanged)
0x47 0x48 Update Section Blocks Current (unchanged)
0x48 0x49 Select Advancements Tab Current (unchanged)
0x49 0x4A Server Data Current (unchanged)
0x4A 0x4B Set Action Bar Text Current (unchanged)
0x4B 0x4C Set Border Center Current (unchanged)
0x4C 0x4D Set Border Lerp Size Current (unchanged)
0x4D 0x4E Set Border Size Current (unchanged)
0x4E 0x4F Set Border Warning Delay Current (unchanged)
0x4F 0x50 Set Border Warning Distance Current (unchanged)
0x50 0x51 Set Camera Current (unchanged)
0x51 0x52 Set Held Item Current (unchanged)
0x52 0x53 Set Center Chunk Current (unchanged)
0x53 0x54 Set Render Distance Current (unchanged)
0x54 0x55 Set Default Spawn Position Current (unchanged)
0x55 0x56 Display Objective Current (unchanged)
0x56 0x57 Set Entity Metadata Current (unchanged)
0x57 0x58 Link Entities Current (unchanged)
0x58 0x59 Set Entity Velocity Current (unchanged)
0x59 0x5A Set Equipment Current (unchanged)
0x5A 0x5B Set Experience Current (unchanged)
0x5B 0x5C Set Health Current (unchanged)
0x5C 0x5D Update Objectives Current (unchanged)
0x5D 0x5E Set Passengers Current (unchanged)
0x5E 0x5F Update Teams Current (unchanged)
0x5F 0x60 Update Score Current (unchanged)
0x60 0x61 Set Simulation Distance Current (unchanged)
0x61 0x62 Set Subtitle Text Current (unchanged)
0x62 0x63 Update Time Current (unchanged)
0x63 0x64 Set Title Text Current (unchanged)
0x64 0x65 Set Title Animation Times Current (unchanged)
0x65 0x66 Entity Sound Effect Current (unchanged)
0x66 0x67 Sound Effect Current (unchanged)
0x67 0x68 Start Configuration Current (unchanged)
0x68 0x69 Stop Sound Current (unchanged)
0x6A Store Cookie (Play) Pre
0x69 0x6B System Chat Message Current (unchanged)
0x6A 0x6C Set Tab List Header And Footer Current (unchanged)
0x6B 0x6D Tag Query Response Current (unchanged)
0x6C 0x6E Pickup Item Current (unchanged)
0x6D 0x6F Teleport Entity Current (unchanged)
0x6E 0x70 Set Ticking State Current (unchanged)
0x6F 0x71 Step Tick Current (unchanged)
0x72 Transfer (Play) Pre
0x70 0x73 Update Advancements Current (unchanged)
0x71 0x74 Update Attributes Current Pre
0x72 0x75 Entity Effect Current Pre
0x73 0x76 Update Recipes Current (unchanged)
0x74 0x77 Update Tags (play) Current (unchanged)
Play serverbound
0x10 Cookie Response (play) Pre
0x10 0x11 Serverbound Plugin Message (play) Current (unchanged)
0x11 0x12 Edit Book Current (unchanged)
0x12 0x13 Query Entity Tag Current (unchanged)
0x13 0x14 Interact Current (unchanged)
0x14 0x15 Jigsaw Generate Current (unchanged)
0x15 0x16 Serverbound Keep Alive (play) Current (unchanged)
0x16 0x17 Lock Difficulty Current (unchanged)
0x17 0x18 Set Player Position Current (unchanged)
0x18 0x19 Set Player Position and Rotation Current (unchanged)
0x19 0x1A Set Player Rotation Current (unchanged)
0x1A 0x1B Set Player On Ground Current (unchanged)
0x1B 0x1C Move Vehicle Current (unchanged)
0x1C 0x1D Paddle Boat Current (unchanged)
0x1D 0x1E Pick Item Current (unchanged)
0x1E 0x1F Ping Request (play) Current (unchanged)
0x1F 0x20 Place Recipe Current (unchanged)
0x20 0x21 Player Abilities Current (unchanged)
0x21 0x22 Player Action Current (unchanged)
0x22 0x23 Player Command Current (unchanged)
0x23 0x24 Player Input Current (unchanged)
0x24 0x25 Pong (play) Current (unchanged)
0x25 0x26 Change Recipe Book Settings Current (unchanged)
0x26 0x27 Set Seen Recipe Current (unchanged)
0x27 0x28 Rename Item Current (unchanged)
0x28 0x29 Resource Pack Response (play) Current (unchanged)
0x29 0x2A Seen Advancements Current (unchanged)
0x2A 0x2B Select Trade Current (unchanged)
0x2B 0x2C Set Beacon Effect Current (unchanged)
0x2C 0x2D Set Held Item Current (unchanged)
0x2D 0x2E Program Command Block Current (unchanged)
0x2E 0x2F Program Command Block Minecart Current (unchanged)
0x2F 0x30 Set Creative Mode Slot Current (unchanged)
0x30 0x31 Program Jigsaw Block Current (unchanged)
0x31 0x32 Program Structure Block Current (unchanged)
0x32 0x33 Update Sign Current (unchanged)
0x33 0x34 Swing Arm Current (unchanged)
0x34 0x35 Teleport To Entity Current (unchanged)
0x35 0x36 Use Item On Current (unchanged)
0x36 0x37 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 Villager Data (VarInt, VarInt, VarInt) villager type, villager profession, level (See below.)
19 Optional VarInt VarInt 0 for absent; 1 + actual value otherwise. Used for entity IDs.
20 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 Cat Variant VarInt An ID in the minecraft:cat_variant registry.
22 Frog Variant VarInt An ID in the minecraft:frog_variant registry.
23 Optional Global Position (Boolean, Optional Identifier, Optional Position) dimension identifier, position; only if the Boolean is set to true.
24 Painting Variant VarInt An ID in the minecraft:painting_variant registry.
25 Sniffer State VarInt Enum IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
26 Armadillo State VarInt Enum IDLE = 0, ROLLING = 1, SCARED = 2
26 27 Vector3 (Float, Float, Float) x, y, z
27 28 Quaternion (Float, Float, Float, Float) x, y, z, w

Armadillo

Extends Animal.

Index Type Meaning Default
17 Armadillo State (26) 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

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 Optional ByteArray(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.

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
0x09 Configuration Client Key Identifier The identifier of the cookie.
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
0x0A Configuration Client Host String The hostname of IP of the server.
Port VarInt The port of the server.

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 Optional ByteArray(5120) The data of the cookie, if any.

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.

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
0x6A Play Client Key Identifier The identifier of the cookie.
Payload ByteArray(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
0x72 Play Client Host String The hostname of IP of the server.
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):

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
Huh.png 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

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
0x6A 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 Optional ByteArray(5120) The data of the cookie, if any.