Difference between revisions of "Pre-release protocol"

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{{Box
+
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.4, protocol 765]]) to the current pre-release (currently [[Protocol version numbers|24w13a, protocol {{Snapshot PVN|1073742006}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
  |BORDER = #FF9999
 
  |BACKGROUND = #FFCC99
 
  |WIDTH = 100%
 
  |ICON =
 
  |HEADING = Under construction
 
  |CONTENT = In light of the recent release of Minecraft 1.9, this article still contains some changes between 1.8.9 and 1.9, which are currently being merged into [[Protocol]]. If you want to contribute, please coordinate with us in [irc://irc.freenode.net/mcdevs #mcdevs], and ping [[User:Fenhl|Fenhl]] before making any edits.
 
}}
 
 
 
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.9, protocol 107]]) to the current pre-release (currently [[Protocol version numbers|1.9, protocol 107]]). 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 25: Line 16:
 
  ! ID
 
  ! ID
 
  ! Packet name
 
  ! Packet name
  ! colspan=2 | Documentation
+
  !colspan="2"| Documentation
 +
|-
 +
!colspan="4"| Handshake serverbound
 +
{{PacketList|0x00|Handshake}}
 
  |-
 
  |-
  ! colspan=4 | Play clientbound
+
  !colspan="4"| Login clientbound
{{PacketList|0x00|Spawn Object}}
+
{{PacketList|0x01|Encryption Request}}
{{PacketList|0x01|Spawn Experience Orb}}
+
{{PacketList|0x05|Cookie Request (login)|rel=added}}
{{PacketList|0x02|Spawn Global Entity}}
 
{{PacketList|0x03|Spawn Mob}}
 
{{PacketList|0x04|Spawn Painting}}
 
{{PacketList|0x05|Spawn Player}}
 
{{PacketList|0x0C|Boss Bar}}
 
{{PacketList|0x17|Set Cooldown}}
 
{{PacketList|0x19|Named Sound Effect|rel=Sound Effect}}
 
{{PacketList|0x1B|Entity Status}}
 
{{PacketList|0x1D|Unload Chunk}}
 
{{PacketList|0x20|Chunk Data}}
 
{{PacketList|0x24|Map}}
 
{{PacketList|0x25|Entity Relative Move}}
 
{{PacketList|0x26|Entity Look And Relative Move}}
 
{{PacketList|0x29|Vehicle Move}}
 
{{PacketList|0x2C|Combat Event}}
 
{{PacketList|0x2E|Player Position And Look|rel=Player Position And Look (clientbound)}}
 
{{PacketList|0x2F|Use Bed}}
 
{{PacketList|0x3A|Attach Entity}}
 
{{PacketList|0x3C|Entity Equipment}}
 
{{PacketList|0x40|Set Passengers}}
 
{{PacketList|0x41|Teams}}
 
{{PacketList|0x47|Sound Effect}}
 
{{PacketList|0x4A|Entity Teleport}}
 
{{PacketList|0x4B|Entity Properties}}
 
{{PacketList|0x4C|Entity Effect}}
 
 
  |-
 
  |-
  ! colspan=4 | Play serverbound
+
  !colspan="4"| Login serverbound
{{PacketList|0x00|Teleport Confirm|rel=added}}
+
{{PacketList|0x04|Cookie Response (login)|rel=added}}
{{PacketList|{{Change|0x14|0x01}}|Tab-Complete|rel=Tab-Complete 2}}
 
{{PacketList|{{Change|0x01|0x02}}|Chat Message|rel=Chat Message 2|pre=unchanged}}
 
{{PacketList|{{Change|0x16|0x03}}|Client Status}}
 
{{PacketList|{{Change|0x15|0x04}}|Client Settings}}
 
{{PacketList|{{Change|0x0F|0x05}}|Confirm Transaction|rel=Confirm Transaction 2|pre=unchanged}}
 
{{PacketList|{{Change|0x11|0x06}}|Enchant Item|pre=unchanged}}
 
{{PacketList|{{Change|0x0E|0x07}}|Click Window|pre=unchanged}}
 
{{PacketList|{{Change|0x0D|0x08}}|Close Window|rel=Close Window 2|pre=unchanged}}
 
{{PacketList|{{Change|0x17|0x09}}|Plugin Message|rel=Plugin Message 2|pre=unchanged}}
 
{{PacketList|{{Change|0x02|0x0A}}|Use Entity}}
 
{{PacketList|{{Change|0x00|0x0B}}|Keep Alive|rel=Keep Alive 2|pre=unchanged}}
 
{{PacketList|{{Change|0x04|0x0C}}|Player Position|pre=unchanged}}
 
{{PacketList|{{Change|0x06|0x0D}}|Player Position And Look|rel=Player Position And Look 2|pre=unchanged}}
 
{{PacketList|{{Change|0x05|0x0E}}|Player Look|pre=unchanged}}
 
{{PacketList|{{Change|0x03|0x0F}}|Player|pre=unchanged}}
 
{{PacketList|0x10|Vehicle Move (serverbound)|rel=added}}
 
{{PacketList|0x11|Steer Boat|rel=added}}
 
{{PacketList|{{Change|0x13|0x12}}|Player Abilities|rel=Player Abilities 2|pre=unchanged}}
 
{{PacketList|{{Change|0x07|0x13}}|Player Digging}}
 
{{PacketList|{{Change|0x0B|0x14}}|Entity Action}}
 
{{PacketList|{{Change|0x0C|0x15}}|Steer Vehicle|pre=unchanged}}
 
{{PacketList|{{Change|0x19|0x16}}|Resource Pack Status|pre=unchanged}}
 
{{PacketList|{{Change|0x09|0x17}}|Held Item Change|rel=Held Item Change 2|pre=unchanged}}
 
{{PacketList|{{Change|0x10|0x18}}|Creative Inventory Action|pre=unchanged}}
 
{{PacketList|{{Change|0x12|0x19}}|Update Sign|rel=Update Sign 2}}
 
{{PacketList|{{Change|0x0A|0x1A}}|Animation|rel=Animation 2}}
 
{{PacketList|{{Change|0x18|0x1B}}|Spectate|pre=unchanged}}
 
{{PacketList|{{Change|0x08|0x1C}}|Player Block Placement}}
 
{{PacketList|0x1D|Use Item|rel=added}}
 
 
  |-
 
  |-
  ! colspan=4 | Status clientbound
+
  !colspan="4"| Configuration clientbound
{{PacketList|0x00|Response|pre=unchanged}}
+
{{PacketList|0x00|Cookie Request (configuration)|rel=added}}
{{PacketList|0x01|Pong|pre=unchanged}}
+
{{PacketList|{{change|0x00|0x01}}|Clientbound Plugin Message (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x01|0x02}}|Disconnect (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x03|0x04}}|Clientbound Keep Alive (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x04|0x05}}|Ping (configuration)|pre=unchanged}}
 +
{{PacketList|0x06|Reset Chat|rel=added}}
 +
{{PacketList|{{change|0x05|0x07}}|Registry Data}}
 +
{{PacketList|{{change|0x06|0x08}}|Remove Resource Pack (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x07|0x09}}|Add Resource Pack (configuration)|pre=unchanged}}
 +
{{PacketList|0x0A|Store Cookie (configuration)|rel=added}}
 +
{{PacketList|0x0B|Transfer (configuration)|rel=added}}
 +
{{PacketList|{{change|0x08|0x0C}}|Feature Flags|pre=unchanged}}
 +
{{PacketList|{{change|0x09|0x0D}}|Update Tags (configuration)|pre=unchanged}}
 +
{{PacketList|0x0E|Clientbound Known Packs|rel=added}}
 
  |-
 
  |-
  ! colspan=4 | Status serverbound
+
  !colspan="4"| Configuration serverbound
{{PacketList|0x00|Request|pre=unchanged}}
+
{{PacketList|0x01|Cookie Response (configuration)|rel=added}}
{{PacketList|0x01|Ping|pre=unchanged}}
+
{{PacketList|{{change|0x01|0x02}}|Serverbound Plugin Message (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x03|0x04}}|Serverbound Keep Alive (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x04|0x05}}|Pong (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x05|0x06}}|Resource Pack Response (configuration)|pre=unchanged}}
 +
{{PacketList|0x07|Serverbound Known Packs|rel=added}}
 
  |-
 
  |-
  ! colspan=4 | Login clientbound
+
  !colspan="4"| Play clientbound
{{PacketList|0x00|Disconnect|rel=Disconnect 2|pre=unchanged}}
+
{{PacketList|0x16|Cookie Request (Play)|rel=added}}
{{PacketList|0x01|Encryption Request|pre=unchanged}}
+
{{PacketList|{{change|0x16|0x17}}|Set Cooldown|pre=unchanged}}
{{PacketList|0x02|Login Success|pre=unchanged}}
+
{{PacketList|{{change|0x17|0x18}}|Chat Suggestions|pre=unchanged}}
{{PacketList|0x03|Set Compression|rel=Set Compression 2|pre=unchanged}}
+
{{PacketList|{{change|0x18|0x19}}|Clientbound Plugin Message (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x19|0x1A}}|Damage Event|pre=unchanged}}
 +
{{PacketList|0x1B|Debug Sample|rel=added}}
 +
{{PacketList|{{change|0x1A|0x1C}}|Delete Message|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x1D}}|Disconnect (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1E}}|Disguised Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x1D|0x1F}}|Entity Event|pre=unchanged}}
 +
{{PacketList|{{change|0x1E|0x20}}|Explosion|pre=unchanged}}
 +
{{PacketList|{{change|0x1F|0x21}}|Unload Chunk|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x22}}|Game Event|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x23}}|Open Horse Screen|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x24}}|Hurt Animation|pre=unchanged}}
 +
{{PacketList|{{change|0x23|0x25}}|Initialize World Border|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x26}}|Clientbound Keep Alive (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x27}}|Chunk Data and Update Light|pre=unchanged}}
 +
{{PacketList|{{change|0x26|0x28}}|World Event|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x29}}|Particle|pre=unchanged}}
 +
{{PacketList|{{change|0x28|0x2A}}|Update Light|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2B}}|Login (play)}}
 +
{{PacketList|{{change|0x2A|0x2C}}|Map Data|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2D}}|Merchant Offers|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2E}}|Update Entity Position|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x2F}}|Update Entity Position and Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2E|0x30}}|Update Entity Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2F|0x31}}|Move Vehicle|pre=unchanged}}
 +
{{PacketList|{{change|0x30|0x32}}|Open Book|pre=unchanged}}
 +
{{PacketList|{{change|0x31|0x33}}|Open Screen|pre=unchanged}}
 +
{{PacketList|{{change|0x32|0x34}}|Open Sign Editor|pre=unchanged}}
 +
{{PacketList|{{change|0x33|0x35}}|Ping (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x34|0x36}}|Ping Response (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x35|0x37}}|Place Ghost Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x36|0x38}}|Player Abilities|pre=unchanged}}
 +
{{PacketList|{{change|0x37|0x39}}|Player Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x38|0x3A}}|End Combat|pre=unchanged}}
 +
{{PacketList|{{change|0x39|0x3B}}|Enter Combat|pre=unchanged}}
 +
{{PacketList|{{change|0x3A|0x3C}}|Combat Death|pre=unchanged}}
 +
{{PacketList|{{change|0x3B|0x3D}}|Player Info Remove|pre=unchanged}}
 +
{{PacketList|{{change|0x3C|0x3E}}|Player Info Update|pre=unchanged}}
 +
{{PacketList|{{change|0x3D|0x3F}}|Look At|pre=unchanged}}
 +
{{PacketList|{{change|0x3E|0x40}}|Synchronize Player Position|pre=unchanged}}
 +
{{PacketList|{{change|0x3F|0x41}}|Update Recipe Book|pre=unchanged}}
 +
{{PacketList|{{change|0x40|0x42}}|Remove Entities|pre=unchanged}}
 +
{{PacketList|{{change|0x41|0x43}}|Remove Entity Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x42|0x44}}|Reset Score|pre=unchanged}}
 +
{{PacketList|{{change|0x43|0x45}}|Remove Resource Pack (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x44|0x46}}|Add Resource Pack (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x45|0x47}}|Respawn}}
 +
{{PacketList|{{change|0x46|0x48}}|Set Head Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x47|0x49}}|Update Section Blocks|pre=unchanged}}
 +
{{PacketList|{{change|0x48|0x4A}}|Select Advancements Tab|pre=unchanged}}
 +
{{PacketList|{{change|0x49|0x4B}}|Server Data|pre=unchanged}}
 +
{{PacketList|{{change|0x4A|0x4C}}|Set Action Bar Text|pre=unchanged}}
 +
{{PacketList|{{change|0x4B|0x4D}}|Set Border Center|pre=unchanged}}
 +
{{PacketList|{{change|0x4C|0x4E}}|Set Border Lerp Size|pre=unchanged}}
 +
{{PacketList|{{change|0x4D|0x4F}}|Set Border Size|pre=unchanged}}
 +
{{PacketList|{{change|0x4E|0x50}}|Set Border Warning Delay|pre=unchanged}}
 +
{{PacketList|{{change|0x4F|0x51}}|Set Border Warning Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x50|0x52}}|Set Camera|pre=unchanged}}
 +
{{PacketList|{{change|0x51|0x53}}|Set Held Item|pre=unchanged}}
 +
{{PacketList|{{change|0x52|0x54}}|Set Center Chunk|pre=unchanged}}
 +
{{PacketList|{{change|0x53|0x55}}|Set Render Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x54|0x56}}|Set Default Spawn Position|pre=unchanged}}
 +
{{PacketList|{{change|0x55|0x57}}|Display Objective|pre=unchanged}}
 +
{{PacketList|{{change|0x56|0x58}}|Set Entity Metadata|pre=unchanged}}
 +
{{PacketList|{{change|0x57|0x59}}|Link Entities|pre=unchanged}}
 +
{{PacketList|{{change|0x58|0x5A}}|Set Entity Velocity|pre=unchanged}}
 +
{{PacketList|{{change|0x59|0x5B}}|Set Equipment|pre=unchanged}}
 +
{{PacketList|{{change|0x5A|0x5C}}|Set Experience|pre=unchanged}}
 +
{{PacketList|{{change|0x5B|0x5D}}|Set Health|pre=unchanged}}
 +
{{PacketList|{{change|0x5C|0x5E}}|Update Objectives|pre=unchanged}}
 +
{{PacketList|{{change|0x5D|0x5F}}|Set Passengers|pre=unchanged}}
 +
{{PacketList|{{change|0x5E|0x60}}|Update Teams|pre=unchanged}}
 +
{{PacketList|{{change|0x5F|0x61}}|Update Score|pre=unchanged}}
 +
{{PacketList|{{change|0x60|0x62}}|Set Simulation Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x61|0x63}}|Set Subtitle Text|pre=unchanged}}
 +
{{PacketList|{{change|0x62|0x64}}|Update Time|pre=unchanged}}
 +
{{PacketList|{{change|0x63|0x65}}|Set Title Text|pre=unchanged}}
 +
{{PacketList|{{change|0x64|0x66}}|Set Title Animation Times|pre=unchanged}}
 +
{{PacketList|{{change|0x65|0x67}}|Entity Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x66|0x68}}|Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x67|0x69}}|Start Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x68|0x6A}}|Stop Sound|pre=unchanged}}
 +
{{PacketList|0x6B|Store Cookie (Play)|rel=added}}
 +
{{PacketList|{{change|0x69|0x6C}}|System Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x6A|0x6D}}|Set Tab List Header And Footer|pre=unchanged}}
 +
{{PacketList|{{change|0x6B|0x6E}}|Tag Query Response|pre=unchanged}}
 +
{{PacketList|{{change|0x6C|0x6F}}|Pickup Item|pre=unchanged}}
 +
{{PacketList|{{change|0x6D|0x70}}|Teleport Entity|pre=unchanged}}
 +
{{PacketList|{{change|0x6E|0x71}}|Set Ticking State|pre=unchanged}}
 +
{{PacketList|{{change|0x6F|0x72}}|Step Tick|pre=unchanged}}
 +
{{PacketList|0x73|Transfer (Play)|rel=added}}
 +
{{PacketList|{{change|0x70|0x74}}|Update Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x71|0x75}}|Update Attributes}}
 +
{{PacketList|{{change|0x72|0x76}}|Entity Effect}}
 +
{{PacketList|{{change|0x73|0x77}}|Update Recipes|pre=unchanged}}
 +
{{PacketList|{{change|0x74|0x78}}|Update Tags (play)|pre=unchanged}}
 
  |-
 
  |-
  ! colspan=4 | Login serverbound
+
  !colspan="4"| Play serverbound
{{PacketList|0x00|Login Start|pre=unchanged}}
+
{{PacketList|0x04|Chat Command}}
{{PacketList|0x01|Encryption Response|pre=unchanged}}
+
{{PacketList|0x05|Signed Chat Command|rel=added}}
 +
{{PacketList|{{change|0x05|0x06}}|Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x06|0x07}}|Player Session|pre=unchanged}}
 +
{{PacketList|{{change|0x07|0x08}}|Chunk Batch Received|pre=unchanged}}
 +
{{PacketList|{{change|0x08|0x09}}|Client Status|pre=unchanged}}
 +
{{PacketList|{{change|0x09|0x0A}}|Client Information (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x0A|0x0B}}|Command Suggestions Request|pre=unchanged}}
 +
{{PacketList|{{change|0x0B|0x0C}}|Acknowledge Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x0C|0x0D}}|Click Container Button|pre=unchanged}}
 +
{{PacketList|{{change|0x0D|0x0E}}|Click Container|pre=unchanged}}
 +
{{PacketList|{{change|0x0E|0x0F}}|Close Container|pre=unchanged}}
 +
{{PacketList|{{change|0x0F|0x10}}|Change Container Slot State|pre=unchanged}}
 +
{{PacketList|0x11|Cookie Response (play)|rel=added}}
 +
{{PacketList|{{change|0x10|0x12}}|Serverbound Plugin Message (play)|pre=unchanged}}
 +
{{PacketList|0x13|Debug Sample Subscription|rel=added}}
 +
{{PacketList|{{change|0x11|0x14}}|Edit Book|pre=unchanged}}
 +
{{PacketList|{{change|0x12|0x15}}|Query Entity Tag|pre=unchanged}}
 +
{{PacketList|{{change|0x13|0x16}}|Interact|pre=unchanged}}
 +
{{PacketList|{{change|0x14|0x17}}|Jigsaw Generate|pre=unchanged}}
 +
{{PacketList|{{change|0x15|0x18}}|Serverbound Keep Alive (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x16|0x19}}|Lock Difficulty|pre=unchanged}}
 +
{{PacketList|{{change|0x17|0x1A}}|Set Player Position|pre=unchanged}}
 +
{{PacketList|{{change|0x18|0x1B}}|Set Player Position and Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x19|0x1C}}|Set Player Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x1A|0x1D}}|Set Player On Ground|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x1E}}|Move Vehicle|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1F}}|Paddle Boat|pre=unchanged}}
 +
{{PacketList|{{change|0x1D|0x20}}|Pick Item|pre=unchanged}}
 +
{{PacketList|{{change|0x1E|0x21}}|Ping Request (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x1F|0x22}}|Place Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x23}}|Player Abilities|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x24}}|Player Action|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x25}}|Player Command|pre=unchanged}}
 +
{{PacketList|{{change|0x23|0x26}}|Player Input|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x27}}|Pong (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x28}}|Change Recipe Book Settings|pre=unchanged}}
 +
{{PacketList|{{change|0x26|0x29}}|Set Seen Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x2A}}|Rename Item|pre=unchanged}}
 +
{{PacketList|{{change|0x28|0x2B}}|Resource Pack Response (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2C}}|Seen Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x2A|0x2D}}|Select Trade|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2E}}|Set Beacon Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2F}}|Set Held Item|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x30}}|Program Command Block|pre=unchanged}}
 +
{{PacketList|{{change|0x2E|0x31}}|Program Command Block Minecart|pre=unchanged}}
 +
{{PacketList|{{change|0x2F|0x32}}|Set Creative Mode Slot|pre=unchanged}}
 +
{{PacketList|{{change|0x30|0x33}}|Program Jigsaw Block|pre=unchanged}}
 +
{{PacketList|{{change|0x31|0x34}}|Program Structure Block|pre=unchanged}}
 +
{{PacketList|{{change|0x32|0x35}}|Update Sign|pre=unchanged}}
 +
{{PacketList|{{change|0x33|0x36}}|Swing Arm|pre=unchanged}}
 +
{{PacketList|{{change|0x34|0x37}}|Teleport To Entity|pre=unchanged}}
 +
{{PacketList|{{change|0x35|0x38}}|Use Item On|pre=unchanged}}
 +
{{PacketList|{{change|0x36|0x39}}|Use Item|pre=unchanged}}
 
  |}
 
  |}
  
 
== New/modified data types ==
 
== New/modified data types ==
  
None so far.
+
No changes so far.
  
== Handshaking ==
+
== Entity Metadata ==
  
=== Clientbound ===
+
{{#vardefine: meta_prerelease | 1}}
  
No changes so far.
+
{{Metadata type definition/begin}}
 +
! Value
 +
! Notes
 +
{{Metadata type definition|Byte}}
 +
| {{Type|Byte}}
 +
|
 +
{{Metadata type definition|VarInt}}
 +
| {{Type|VarInt}}
 +
|
 +
{{Metadata type definition|VarLong}}
 +
| {{Type|VarLong}}
 +
|
 +
{{Metadata type definition|Float}}
 +
| {{Type|Float}}
 +
|
 +
{{Metadata type definition|String}}
 +
| {{Type|String}}
 +
|
 +
{{Metadata type definition|Text Component}}
 +
| {{Type|Text Component}}
 +
|
 +
{{Metadata type definition|Optional Text Component}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|Text Component}})
 +
| Text Component is present if the Boolean is set to true.
 +
{{Metadata type definition|Slot}}
 +
| {{Type|Slot}}
 +
|
 +
{{Metadata type definition|Boolean}}
 +
| {{Type|Boolean}}
 +
|
 +
{{Metadata type definition|Rotations}}
 +
| ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 +
| rotation on x, rotation on y, rotation on z
 +
{{Metadata type definition|Position}}
 +
| {{Type|Position}}
 +
|
 +
{{Metadata type definition|Optional Position}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|Position}})
 +
| Position is present if the Boolean is set to true.
 +
{{Metadata type definition|Direction}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5
 +
{{Metadata type definition|Optional UUID}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|UUID}})
 +
| UUID is present if the Boolean is set to true.
 +
{{Metadata type definition|Block State}}
 +
| {{Type|VarInt}}
 +
| An ID in the block state registry.
 +
{{Metadata type definition|Optional Block State}}
 +
| {{Type|VarInt}}
 +
| 0 for absent (air is unrepresentable); otherwise, an ID in the block state registry.
 +
{{Metadata type definition|NBT}}
 +
| {{Type|NBT}}
 +
|
 +
{{Metadata type definition|Particle}}
 +
| ({{Type|VarInt}}, Varies)
 +
| particle type (an ID in the <code>minecraft:particle_type</code> registry), particle data (See [[Particles]].)
 +
{{Metadata type definition|Particles|rel=added}}
 +
| ({{Type|VarInt}}, Array of Particle)
 +
| length of array, particle data (See directly above.)
 +
{{Metadata type definition|Villager Data}}
 +
| ({{Type|VarInt}}, {{Type|VarInt}}, {{Type|VarInt}})
 +
| villager type, villager profession, level (See below.)
 +
{{Metadata type definition|Optional VarInt}}
 +
| {{Type|VarInt}}
 +
| 0 for absent; 1 + actual value otherwise. Used for entity IDs.
 +
{{Metadata type definition|Pose}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| STANDING = 0, FALL_FLYING = 1, SLEEPING = 2, SWIMMING = 3, SPIN_ATTACK = 4, SNEAKING = 5, LONG_JUMPING = 6, DYING = 7, CROAKING = 8, USING_TONGUE = 9, SITTING = 10, ROARING = 11, SNIFFING = 12, EMERGING = 13, DIGGING = 14{{change||2=, SLIDING = 15, SHOOTING = 16, INHALING = 17}}
 +
{{Metadata type definition|Cat Variant}}
 +
| {{Type|VarInt}}
 +
| An ID in the <code>minecraft:cat_variant</code> registry.
 +
{{Metadata type definition|Wolf Variant|rel=added}}
 +
| {{Type|VarInt}}
 +
| An ID in the <code>minecraft:wolf_variant</code> registry.
 +
{{Metadata type definition|Frog Variant}}
 +
| {{Type|VarInt}}
 +
| An ID in the <code>minecraft:frog_variant</code> registry.
 +
{{Metadata type definition|Optional Global Position}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|Identifier}}, {{Type|Optional}} {{Type|Position}})
 +
| dimension identifier, position; only if the Boolean is set to true.
 +
{{Metadata type definition|Painting Variant}}
 +
| {{Type|VarInt}}
 +
| An ID in the <code>minecraft:painting_variant</code> registry.
 +
{{Metadata type definition|Sniffer State}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
 +
{{Metadata type definition|Armadillo State|rel=added}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| IDLE = 0, ROLLING = 1, SCARED = 2
 +
{{Metadata type definition|Vector3}}
 +
| ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 +
| x, y, z
 +
{{Metadata type definition|Quaternion}}
 +
| ({{Type|Float}}, {{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 +
| x, y, z, w
 +
|}
  
=== Serverbound ===
+
=== Living Entity ===
  
No changes so far.
+
TODO: This has changed to use the PARTICLES attribute
  
== Play ==
+
=== Wolf ===
 
 
=== Clientbound ===
 
 
 
==== Spawn Object ====
 
  
Sent by the server when a vehicle or other object is created.
+
{{Metadata inherit|Wolf|inherits=Tameable Animal}}
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! Packet ID
+
  ! Index
  ! State
+
  ! Type
  ! Bound To
+
  !style="width: 250px;" colspan="2"| Meaning
  ! Field Name
+
  ! Default
  ! Field Type
+
|- {{added}}
  ! Notes
+
| {{Metadata id|}}
 +
| {{Metadata type|Wolf Variant}}
 +
  |colspan="2"| Wolf Variant
 +
  | PALE
 
  |-
 
  |-
  |rowspan="12"| {{Change|0x0E|0x00}}
+
  | {{Metadata id|}}
  |rowspan="12"| Play
+
  | {{Metadata type|Boolean}}
  |rowspan="12"| Client
+
  |colspan="2"| Is begging
| Entity ID
+
  | false
| VarInt
 
| EID of the object
 
|- style="background-color: #d9ead3;"
 
| Object UUID
 
| UUID
 
  |  
 
 
  |-
 
  |-
  | Type
+
  | {{Metadata id|}}
  | Byte
+
  | {{Metadata type|VarInt}}
  | The type of object (see [[Entities#Objects]])
+
  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
 +
| 14 (Red)
 
  |-
 
  |-
| X
+
  | {{Metadata id|}}
| {{Change|Int|Double}}
+
  | {{Metadata type|VarInt}}
|
+
  |colspan="2"| Anger time
|-
+
  | 0
| Y
 
| {{Change|Int|Double}}
 
|
 
|-
 
| Z
 
| {{Change|Int|Double}}
 
|
 
|-
 
| Pitch
 
| Angle
 
|
 
|-
 
| Yaw
 
| Angle
 
|
 
|-
 
| Data
 
| Int
 
| Meaning dependent on the value of the Type field, see [[Object Data]] for details.
 
|-
 
| Velocity X
 
| {{Change|Optional Short|Short}}
 
  | {{Change|Only sent if the Data field is nonzero.}} Same units as [[#Entity Velocity|Entity Velocity]].
 
|-
 
| Velocity Y
 
  | {{Change|Optional Short|Short}}
 
  | {{Change|Only sent if the Data field is nonzero.}} Same units as [[#Entity Velocity|Entity Velocity]].
 
|-
 
| Velocity Z
 
  | {{Change|Optional Short|Short}}
 
| {{Change|Only sent if the Data field is nonzero.}} Same units as [[#Entity Velocity|Entity Velocity]].
 
 
  |}
 
  |}
  
==== Spawn Experience Orb ====
+
=== Armadillo ===
  
Spawns one or more experience orbs.
+
{{Metadata inherit|Armadillo|inherits=Animal|start_at=17}}
 
+
{| class="wikitable" {{added}}
{| class="wikitable"
+
  ! Index
  ! Packet ID
+
  ! Type
  ! State
+
  !style="width: 250px;" colspan="2"| Meaning
! Bound To
+
  ! Default
! Field Name
 
! Field Type
 
  ! Notes
 
|-
 
|rowspan="5"| {{Change|0x11|0x01}}
 
|rowspan="5"| Play
 
  |rowspan="5"| Client
 
| Entity ID
 
| VarInt
 
| Entity's ID
 
|-
 
| X
 
| {{Change|Int|Double}}
 
|
 
|-
 
| Y
 
| {{Change|Int|Double}}
 
|
 
|-
 
| Z
 
| {{Change|Int|Double}}
 
|
 
 
  |-
 
  |-
  | Count
+
  | {{Metadata id|added}}
  | Short
+
| {{Metadata type|Armadillo State}}
  | The amount of experience this orb will reward once collected
+
  |colspan="2"| Armadillo State
 +
  | IDLE
 
  |}
 
  |}
  
==== Spawn Global Entity ====
+
== Block Actions ==
  
With this packet, the server notifies the client of thunderbolts striking within a 512 block radius around the player. The coordinates specify where exactly the thunderbolt strikes.
+
No changes so far.
  
{| class="wikitable"
+
== Inventories ==
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="5"| {{Change|0x2C|0x02}}
 
|rowspan="5"| Play
 
|rowspan="5"| Client
 
| Entity ID
 
| VarInt
 
| The EID of the thunderbolt
 
|-
 
| Type
 
| Byte
 
| The global entity type, currently always 1 for thunderbolt
 
|-
 
| X
 
| {{Change|Int|Double}}
 
|
 
|-
 
| Y
 
| {{Change|Int|Double}}
 
|
 
|-
 
| Z
 
| {{Change|Int|Double}}
 
|
 
|}
 
  
 +
No changes so far.
  
==== Spawn Mob ====
+
== Plugin Channels ==
  
Sent by the server when a mob entity is spawned.
+
No changes so far.
  
{| class="wikitable"
+
== Handshake ==
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="13"| {{Change|0x0F|0x03}}
 
|rowspan="13"| Play
 
|rowspan="13"| Client
 
| Entity ID
 
| VarInt
 
|
 
|- style="background-color: #d9ead3;"
 
| Entity UUID
 
| UUID
 
|
 
|-
 
| Type
 
| Unsigned Byte
 
| The type of mob. See [[Entities#Mobs]]
 
|-
 
| X
 
| {{Change|Int|Double}}
 
|
 
|-
 
| Y
 
| {{Change|Int|Double}}
 
|
 
|-
 
| Z
 
| {{Change|Int|Double}}
 
|
 
|-
 
| Yaw
 
| Angle
 
|
 
|-
 
| Pitch
 
| Angle
 
|
 
|-
 
| Head Pitch
 
| Angle
 
|
 
|-
 
| Velocity X
 
| Short
 
| Same units as [[Protocol#Entity Velocity|Entity Velocity]]
 
|-
 
| Velocity Y
 
| Short
 
| Same units as [[Protocol#Entity Velocity|Entity Velocity]]
 
|-
 
| Velocity Z
 
| Short
 
| Same units as [[Protocol#Entity Velocity|Entity Velocity]]
 
|-
 
| Metadata
 
| [[#Entity Metadata|Entity Metadata]]
 
|
 
|}
 
  
==== Spawn Painting ====
+
=== Serverbound ===
  
This packet shows location, name, and type of painting.
+
==== Handshake ====
  
Calculating the center of an image: given a (width x height) grid of cells, with (0, 0) being the top left corner, the center is (max(0, width / 2 - 1), height / 2). E.g.
+
This causes the server to switch into the target state.
 
 
2x1 (1, 0)
 
4x4 (1, 2)
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 347: Line 396:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="5"| {{Change|0x10|0x04}}
+
  | rowspan="4"| 0x00
  |rowspan="5"| Play
+
  | rowspan="4"| Handshaking
  |rowspan="5"| Client
+
  | rowspan="4"| Server
  | Entity ID
+
  | Protocol Version
  | VarInt
+
  | [[#Definitions:varint|VarInt]]
|
+
  | See [[protocol version numbers]] (currently 765 in Minecraft 1.20.4).
|- style="background-color: #d9ead3;"
 
| Entity UUID
 
| UUID
 
  |  
 
 
  |-
 
  |-
  | Title
+
  | Server Address
  | String
+
  | [[#Definitions:string|String]] (255)
  | Name of the painting. Max length 13
+
  | 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.
 
  |-
 
  |-
  | Location
+
  | Server Port
  | Position
+
  | [[#Definitions:unsigned-short|Unsigned Short]]
  | Center coordinates
+
  | Default is 25565. The Notchian server does not use this information.
 
  |-
 
  |-
  | Direction
+
  | Next State
  | Unsigned Byte
+
  | [[#Definitions:varint|VarInt]] [[#Definitions:enum|Enum]]
  | Direction the painting faces. 0: north (-z), 1: west (-x), 2: south (+z), 3: east (+x)
+
  | 1 for [[#Status|Status]], 2 for [[#Login|Login]]{{change||, 3 for [[#Login|Transfer]]}}.
 
  |}
 
  |}
  
==== Spawn Player ====
+
== Status ==
  
This packet is sent by the server when a player comes into visible range, ''not'' when a player joins.
+
=== Clientbound ===
  
This packet must be sent after the [[Protocol#Player List Item|Player List Item]] ([[#Play|Play]], 0x38, clientbound) packet that adds the player data for the client to use when spawning a player. If the Player List Item for the player spawned by this packet is not present when this packet arrives, Notchian clients will not spawn the player entity. The Player List Item packet includes skin/cape data.
+
No changes so far.
  
Servers can, however, safely spawn player entities for players not in visible range. The client appears to handle it correctly.
+
=== Serverbound ===
  
When in online-mode the UUIDs must be valid and have valid skin blobs, in offline-mode UUID v3 is used.
+
No changes so far.
  
For NPCs UUID v2 should be used. Note:
+
== Login ==
  
<+Grum> i will never confirm this as a feature you know that :)
+
=== Clientbound ===
  
In an example UUID, <code>xxxxxxxx-xxxx-Yxxx-xxxx-xxxxxxxxxxxx</code>, the UUID version is specified by <code>Y</code>. So, for UUID v3, <code>Y</code> will always be <code>3</code>, and for UUID v2, <code>Y</code> will always be <code>2</code>.
+
==== Encryption Request ====
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 395: Line 440:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="9"| {{Change|0x0C|0x05}}
+
  | rowspan="6"| 0x01
  |rowspan="9"| Play
+
  | rowspan="6"| Login
  |rowspan="9"| Client
+
  | rowspan="6"| Client
  | Entity ID
+
  | Server ID
  | VarInt
+
  | {{Type|String}} (20)
  | Player's EID
+
  | Appears to be empty.
 
  |-
 
  |-
  | Player UUID
+
  | Public Key Length
  | UUID
+
  | {{Type|VarInt}}
  |  
+
  | Length of Public Key.
 
  |-
 
  |-
  | X
+
  | Public Key
  | {{Change|Int|Double}}
+
  | {{Type|Byte Array}}
  |  
+
  | The server's public key, in bytes.
|-
 
| Y
 
| {{Change|Int|Double}}
 
|
 
|-
 
| Z
 
| {{Change|Int|Double}}
 
|
 
|-
 
| Yaw
 
| Angle
 
|
 
 
  |-
 
  |-
  | Pitch
+
  | Verify Token Length
  | Angle
+
  | {{Type|VarInt}}
|
+
  | Length of Verify Token. Always 4 for Notchian servers.
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Current Item
 
| Short
 
  | The item the player is currently holding. Note that this should be 0 for “no item”, unlike -1 used in other packets.
 
 
  |-
 
  |-
  | Metadata
+
  | Verify Token
  | [[#Entity Metadata|Entity Metadata]]
+
  | {{Type|Byte Array}}
 +
| A sequence of random bytes generated by the server.
 +
|- {{added}}
 +
| Should Authenticate
 +
| {{Type|Boolean}}
 
  |  
 
  |  
 
  |}
 
  |}
  
==== {{Change||Boss Bar}} ====  
+
==== Cookie Request (login) ====
 +
 
 +
Requests a cookie that was previously stored.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  !colspan="2"| Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="15"| {{Change|0x49|0x0C}}
+
  | rowspan="1"| 0x05
  |rowspan="15"| Play
+
  | rowspan="1"| Login
  |rowspan="15"| Client
+
  | rowspan="1"| Client
  |colspan="2"| UUID
+
  | colspan="2"| Key
| UUID
+
  | colspan="2"| Identifier
| Unique ID for this bar
+
  | The identifier of the cookie.
|-
 
  |colspan="2"| Action
 
| VarInt Enum
 
  | Determines the layout of the remaining packet
 
|-
 
! Action
 
! Field Name
 
!
 
!
 
|-
 
|rowspan="5"| 0: add
 
| Title
 
| [[Chat]]
 
|
 
|-
 
| Health
 
| Float
 
| From 0 to 1. Values greater than 1 do not crash the client, and start [https://i.johni0702.de/nA.png rendering part of a second health bar] at around 1.5.
 
|-
 
| Color
 
| VarInt Enum
 
| Color ID (see below)
 
|-
 
| Division
 
| VarInt Enum
 
| Type of division (see below)
 
|-
 
| Flags
 
| Unsigned Byte
 
| Bit mask: 0x1 should darken sky, 0x2: is dragon bar (used to play end music)
 
|-
 
| 1: remove
 
| ''no fields''
 
| ''no fields''
 
| Removes this boss bar
 
|-
 
| 2: update health
 
| Health
 
| Float
 
| as above
 
|-
 
| 3: update title
 
| Title
 
| [[Chat]]
 
|
 
|-
 
|rowspan="2"| 4: update style
 
| Color
 
| VarInt Enum
 
| Color ID (see below)
 
|-
 
| Dividers
 
| VarInt Enum
 
| as above
 
|-
 
| 5: update flags
 
| Flags
 
| Unsigned Byte
 
| as above
 
|-
 
 
  |}
 
  |}
  
{| class="wikitable"
+
=== Serverbound ===
  ! ID
+
 
  ! Color
+
==== Cookie Response (login) ====
 +
 
 +
Response to a [[#Cookie_Request_(login)|Cookie Request (login)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
 +
 
 +
{| class="wikitable" {{added}}
 +
  ! Packet ID
 +
  ! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 
  |-
 
  |-
  | 0
+
  | rowspan="4"| 0x04
  | Pink
+
| rowspan="4"| Login
 +
| rowspan="4"| Server
 +
| colspan="2"| Key
 +
| colspan="2"| Identifier
 +
  | The identifier of the cookie.
 
  |-
 
  |-
  | 1
+
  | colspan="2"| Has Payload
  | Blue
+
| colspan="2"| Boolean
 +
  | The payload is only present if the cookie exists on the client.
 
  |-
 
  |-
  | 2
+
  | colspan="2"| Payload Length
  | Red
+
| colspan="2"| VarInt
 +
  | Length of the following byte array.
 
  |-
 
  |-
  | 3
+
  | colspan="2"| Payload
| Green
+
  | colspan="2"| Optional Byte Array (5120)
|-
+
  | The data of the cookie, if any.
| 4
 
| Yellow
 
|-
 
  | 5
 
| Purple
 
|-
 
| 6
 
  | White
 
 
  |}
 
  |}
  
{| class="wikitable"
+
== Configuration ==
! ID
+
 
! Type of division
+
=== Clientbound ===
|-
 
| 0
 
| No division
 
|-
 
| 1
 
| 6 notches
 
|-
 
| 2
 
| 10 notches
 
|-
 
| 3
 
| 12 notches
 
|-
 
| 4
 
| 20 notches
 
|}
 
  
==== {{Change||Set Cooldown}} ====
+
==== Cookie Request (configuration) ====
  
Applies a cooldown period to an item type.
+
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="2"| 0x17
+
  | rowspan="1"| 0x00
  |rowspan="2"| Play
+
  | rowspan="1"| Configuration
  |rowspan="2"| Client
+
  | rowspan="1"| Client
  | Item ID
+
  | colspan="2"| Key
| VarInt
+
  | colspan="2"| Identifier
  | ID of the item to apply a cooldown to.
+
  | The identifier of the cookie.
|-
 
| Cooldown Ticks
 
| VarInt
 
  | Number of ticks to apply a cooldown for.
 
 
  |}
 
  |}
  
==== Named Sound Effect ====
+
==== Reset Chat ====
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 593: Line 556:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="7"| {{Change|0x29|0x19}}
+
  | 0x06
  |rowspan="7"| Play
+
  | Configuration
  |rowspan="7"| Client
+
  | Client
  | Sound Name
+
  | colspan="3"| ''no fields''
| String
 
| All known sound effect names can be seen [https://github.com/SirCmpwn/Craft.Net/blob/master/source/Craft.Net.Common/SoundEffect.cs here]
 
|- style="background-color: #d9ead3;"
 
| Sound Category
 
| VarInt Enum
 
| The category that this sound will be played from ([https://gist.github.com/konwboj/7c0c380d3923443e9d55 current categories])
 
|-
 
| Effect Position X
 
| Int
 
| Effect X multiplied by 8
 
|-
 
| Effect Position Y
 
| Int
 
| Effect Y multiplied by 8
 
|-
 
| Effect Position Z
 
| Int
 
| Effect Z multiplied by 8
 
|-
 
| Volume
 
| Float
 
| 1 is 100%, can be more
 
|-
 
| Pitch
 
| Unsigned Byte
 
| 63 is 100%, can be more
 
 
  |}
 
  |}
  
==== Entity Status ====
+
==== Registry Data ====
 +
 
 +
Represents certain registries that are sent from the server and are applied on the client. {{change||The packet is sent for each of the following registries: <code>minecraft:worldgen/biome</code>, <code>minecraft:chat_type</code>, <code>minecraft:trim_pattern</code>, <code>minecraft:trim_material</code>, <code>minecraft:wolf_variant</code>, <code>minecraft:dimension_type</code>, <code>minecraft:damage_type</code>, and <code>minecraft:banner_pattern</code>.}}
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 631: Line 570:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="2"| {{Change|0x1A|0x1B}}
+
  | rowspan="6"| 0x07
  |rowspan="2"| Play
+
| rowspan="6"| Configuration
  |rowspan="2"| Client
+
  | rowspan="6"| Client
  | Entity ID
+
|{{removed}} colspan="2"| Registry Codec
  | Int
+
  |{{removed}} colspan="2"| {{Type|NBT}} (Compound)
 +
|{{removed}}| See [[Registry Data]].
 +
|- {{added}}
 +
  | colspan="2"| Registry ID
 +
  | colspan="2"| Identifier
 
  |  
 
  |  
  |-
+
  |- {{added}}
  | Entity Status
+
  | colspan="2"| Entry Count
  | Byte Enum
+
| colspan="2"| VarInt
  | See below
+
| Number of entries in the following array.
 +
|- {{added}}
 +
| rowspan="3"| Entries
 +
| Entry ID
 +
| rowspan="3"| Array
 +
| Identifier
 +
|
 +
|- {{added}}
 +
| Has Data
 +
| Boolean
 +
| Whether the entry has any data following.
 +
|- {{added}}
 +
| Data
 +
  | NBT Tag
 +
  | Entry data. Only present if Has Data is true.
 
  |}
 
  |}
  
{| class="wikitable"
+
==== Store Cookie (configuration) ====
|-
 
! Entity Status
 
! Meaning
 
|-
 
| 1
 
| Sent when resetting a mob spawn minecart's timer — appears to be unused by the client
 
|-
 
| 2
 
| Living Entity hurt
 
|-
 
| 3
 
| Living Entity dead
 
|-
 
| 4
 
| Iron Golem throwing up arms
 
|-
 
| 6
 
| Wolf/Ocelot/Horse taming — Spawn “heart” particles
 
|-
 
| 7
 
| Wolf/Ocelot/Horse tamed — Spawn “smoke” particles
 
|-
 
| 8
 
| Wolf shaking water — Trigger the shaking animation
 
|-
 
| 9
 
| (of self) Eating accepted by server
 
|-
 
| 10
 
| Sheep eating grass
 
|-
 
| 10
 
| Play TNT ignite sound
 
|-
 
| 11
 
| Iron Golem handing over a rose
 
|-
 
| 12
 
| Villager mating — Spawn “heart” particles
 
|-
 
| 13
 
| Spawn particles indicating that a villager is angry and seeking revenge
 
|-
 
| 14
 
| Spawn happy particles near a villager
 
|-
 
| 15
 
| Witch animation — Spawn “magic” particles
 
|-
 
| 16
 
| Play zombie converting into a villager sound
 
|-
 
| 17
 
| Firework exploding
 
|-
 
| 18
 
| Animal in love (ready to mate) — Spawn “heart” particles
 
|-
 
| 19
 
| Reset squid rotation
 
|-
 
| 20
 
| Spawn explosion particle — works for some living entities
 
|-
 
| 21
 
| Play guardian sound — works for every entity
 
|-
 
| 22
 
| Enables reduced {{Minecraft Wiki|Debug screen|debug}} for players
 
|-
 
| 23
 
| Disables reduced {{Minecraft Wiki|Debug screen|debug}} for players
 
|- style="background-color: #d9ead3;"
 
| 24–28
 
| Sets {{Minecraft Wiki|Server.properties#op-permission-level|op permission level}} 0–4 for players
 
|}
 
 
 
==== {{Change||Unload Chunk}} ====
 
  
Tells the client to unload a chunk.
+
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="2"| 0x1D
+
  | rowspan="2"| 0x0A
  |rowspan="2"| Play
+
  | rowspan="2"| Configuration
  |rowspan="2"| Client
+
  | rowspan="2"| Client
  | Chunk X
+
  | colspan="2"| Key
  | Int
+
  | colspan="2"| Identifier
  | Chunk X coordinate
+
  | The identifier of the cookie.
 
  |-
 
  |-
  | Chunk Z
+
  | colspan="2"| Payload
  | Int
+
  | colspan="2"| ByteArray(5120)
  | Chunk Z coordinate
+
  | The data of the cookie.
 
  |}
 
  |}
  
==== Chunk Data ====
+
==== Transfer (configuration) ====
  
Chunk pillars are not unloaded by the client automatically. To unload chunk pillars, {{Change|send this packet with Ground-Up Continuous{{=}}true and no 16^3 chunks (eg. Primary Bit Mask{{=}}0)|send an [[#Unload Chunk|Unload Chunk]] packet with the chunk's X and Z coordinates}}. The server only sends skylight information for chunk pillars in the 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.
+
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
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="7"| {{Change|0x21|0x20}}
+
  | rowspan="2"| 0x0B
  |rowspan="7"| Play
+
  | rowspan="2"| Configuration
  |rowspan="7"| Client
+
  | rowspan="2"| Client
  | Chunk X
+
  | colspan="2"| Host
  | Int
+
  | colspan="2"| String
  | Chunk X coordinate
+
  | The hostname of IP of the server.
 
  |-
 
  |-
  | Chunk Z
+
  | colspan="2"| Port
| Int
+
  | colspan="2"| VarInt
| Chunk Z coordinate
+
  | The port of the server.
|-
 
| Ground-Up Continuous
 
| Boolean
 
| This is true if the packet represents all chunk sections in this vertical chunk column, where the Primary Bit Mask specifies exactly which chunk sections are included, and which are air.
 
|-
 
| Primary Bit Mask
 
| {{Change|Unsigned Short|VarInt}}
 
  | Bitmask with bits set to 1 for every 16×16×16 chunk section whose data follows in the compressed data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
 
|-
 
| Size
 
| VarInt
 
| Size of Data in bytes, plus size of Biomes in bytes if present
 
|-
 
| Data
 
| Array of [[SMP Map Format|Chunk Section]]
 
  | The length of the array is equal to the number of bits set in Primary Bit Mask. Chunks are sent bottom-to-top, i.e. the first chunk, if sent, extends from Y=0 to Y=15.
 
|-
 
| Biomes
 
| Optional Byte Array
 
| Only if Ground-Up Continuous: biome array, byte per XZ coordinate, 256 bytes total.
 
 
  |}
 
  |}
  
==== Map ====
+
==== Clientbound Known Packs ====
 +
Informs the client of which data packs are present on the server.
 +
The client is expected to respond with its own [[#Serverbound_Known_Packs|Serverbown Known Packs]] packet.
 +
The Notchian server does not continue with Configuration until it receives a response.
  
Updates a rectangular area on a {{Minecraft Wiki|map}} item.
+
{| class="wikitable" {{added}}
 
 
{| class="wikitable"
 
 
  ! Packet ID
 
  ! Packet ID
 
  ! 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="13"| {{Change|0x34|0x24}}
+
  | rowspan="4"| 0x0E
  |rowspan="13"| Play
+
  | rowspan="4"| Configuration
  |rowspan="13"| Client
+
  | rowspan="4"| Client
  |colspan="2"| Item Damage
+
  | colspan="2"| Known Pack Count
  |colspan="2"| VarInt
+
  | colspan="2"| VarInt
  | The damage value (map ID) of the map being modified
+
  | The number of known packs in the following array.
 
  |-
 
  |-
  |colspan="2"| Scale
+
  | rowspan="3"| Known Packs
  |colspan="2"| Byte
+
  | Namespace
| From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
+
  | rowspan="3"| Array
  |- style="background-color: #d9ead3;"
+
  | String
|colspan="2" | Tracking Position
+
  |
  |colspan="2" | Boolean
 
| Specifies whether the icons are shown
 
|-
 
|colspan="2"| Icon Count
 
|colspan="2"| VarInt
 
  | Number of elements in the following array
 
 
  |-
 
  |-
  |rowspan="3"| Icon
+
  | ID
| Direction And Type
+
  | String
|rowspan="3"| Array
+
  |
  | Byte
 
  | 0xF0 = Direction, 0x0F = Type
 
 
  |-
 
  |-
  | X
+
  | Version
  | Byte
+
  | String
  |  
+
  |
|-
 
| Z
 
| Byte
 
|
 
|-
 
|colspan="2"| Columns
 
|colspan="2"| Byte
 
| Number of columns updated
 
|-
 
|colspan="2"| Rows
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; number of rows updated
 
|-
 
|colspan="2"| X
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; x offset of the westernmost column
 
|-
 
|colspan="2"| Z
 
|colspan="2"| Optional Byte
 
| Only if Columns is more than 0; z offset of the northernmost row
 
|-
 
|colspan="2"| Length
 
|colspan="2"| Optional VarInt
 
| Only if Columns is more than 0; length of the following array
 
|-
 
|colspan="2"| Data
 
|colspan="2"| Optional Array of Byte Enum
 
| Only if Columns is more than 0; see {{Minecraft Wiki|Map item format}}
 
 
  |}
 
  |}
  
==== Entity Relative Move ====
+
=== Serverbound ===
  
This packet is sent by the server when an entity moves less then 1024 blocks; if an entity moves more than 1024 blocks [[#Entity Teleport|Entity Teleport]] should be sent instead.
+
==== Cookie Response (configuration) ====
  
This packet allows at most 1024 blocks movement in any direction, because short range is from -32768 to -32767.
+
Response to a [[#Cookie_Request_(configuration)|Cookie Request (configuration)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
  
 
+
{| class="wikitable" {{added}}
{| 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="5"| {{Change|0x15|0x25}}
+
  | rowspan="4"| 0x01
  |rowspan="5"| Play
+
  | rowspan="4"| Configuration
  |rowspan="5"| Client
+
  | rowspan="4"| Server
  | Entity ID
+
  | colspan="2"| Key
| VarInt
+
  | colspan="2"| Identifier
  |  
+
  | The identifier of the cookie.
|-
 
  | Delta X
 
| {{Change|Byte|Short}}
 
| Change in X position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentX * 32 - prevX * 32) * 128}}
 
 
  |-
 
  |-
  | Delta Y
+
  | colspan="2"| Has Payload
  | {{Change|Byte|Short}}
+
  | colspan="2"| Boolean
  | Change in Y position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentY * 32 - prevY * 32) * 128}}
+
  | The payload is only present if the cookie exists on the client.
 
  |-
 
  |-
  | Delta Z
+
  | colspan="2"| Payload Length
  | {{Change|Byte|Short}}
+
  | colspan="2"| VarInt
  | Change in Z position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentZ * 32 - prevZ * 32) * 128}}
+
  | Length of the following byte array.
 
  |-
 
  |-
  | On Ground
+
  | colspan="2"| Payload
  | Boolean
+
  | colspan="2"| Optional Byte Array (5120)
  |  
+
  | The data of the cookie, if any.
 
  |}
 
  |}
  
==== Entity Look And Relative Move ====
+
==== Serverbound Known Packs ====
  
This packet is sent by the server when an entity rotates and moves. Since a short range is limited from -32768 to 32767, and movement is offset of fixed-point numbers, this packet allows at most 1024 blocks movement in any direction. (-32768/32 == -1024)
+
ID 0x07, same structure as Clientbound Known Packs. If the client specifies a pack in this packet, the server should omit its contained data from Registry Data.
  
{| class="wikitable"
+
== Play ==
 +
 
 +
=== Clientbound ===
 +
 
 +
==== Cookie Request (play) ====
 +
 
 +
Requests a cookie that was previously stored.
 +
 
 +
{| 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="7"| {{Change|0x17|0x26}}
+
  | rowspan="1"| 0x16
  |rowspan="7"| Play
+
  | rowspan="1"| Play
  |rowspan="7"| Client
+
  | rowspan="1"| Client
  | Entity ID
+
  | colspan="2"| Key
| VarInt
+
  | colspan="2"| Identifier
  |  
+
  | The identifier of the cookie.
|-
 
| Delta X
 
| {{Change|Byte|Short}}
 
| Change in X position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentX * 32 - prevX * 32) * 128}}
 
|-
 
| Delta Y
 
| {{Change|Byte|Short}}
 
| Change in Y position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentY * 32 - prevY * 32) * 128}}
 
|-
 
| Delta Z
 
| {{Change|Byte|Short}}
 
| Change in Z position as {{Change|a [[Data Types#Fixed-point numbers|Fixed-Point number]]|(currentZ * 32 - prevZ * 32) * 128}}
 
|-
 
| Yaw
 
| Angle
 
| New angle, not a delta
 
|-
 
| Pitch
 
| Angle
 
| New angle, not a delta
 
|-
 
| On Ground
 
| Boolean
 
  |  
 
 
  |}
 
  |}
  
==== {{Change||Vehicle Move}} ====
+
==== Debug Sample ====
  
Note that all fields use absolute positioning and do not allow for relative positioning.
+
{| class="wikitable" {{added}}
 
 
{| class="wikitable"
 
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 958: Line 759:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="7"| 0x29
+
  | rowspan="3"| 0x1B
  |rowspan="7"| Play
+
  | rowspan="3"| Play
  |rowspan="7"| Client
+
  | rowspan="3"| Client
  | X
+
  | Sample Length
  | Double
+
  | VarInt
  | Absolute position (X coordinate)
+
  | The length of the following array.
 
  |-
 
  |-
  | Y
+
  | Sample
  | Double
+
  | Long Array
  | Absolute position (Y coordinate)
+
  | TODO: What is the structure of the data in this array?
 
  |-
 
  |-
  | Z
+
  | Sample Type
  | Double
+
  | VarInt Enum
  | Absolute position (Z coordinate)
+
  | The type of sample data. Currently always 0 (TICK_TIME).
|-
 
| Yaw
 
| Float
 
| Absolute rotation on the vertical Axis, in degrees
 
|-
 
| Pitch
 
| Float
 
| Absolute rotation on the horizontal Axis, in degrees
 
 
  |}
 
  |}
  
==== Combat Event ====
+
==== Login (play) ====
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 988: Line 781:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  !colspan="2"| Field Name
+
  ! Field Name
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="8"| {{Change|0x42|0x2C}}
+
  | rowspan="22"| 0x2B
  |rowspan="8"| Play
+
  | rowspan="22"| Play
  |rowspan="8"| Client
+
  | rowspan="22"| Client
  |colspan="2"| Event
+
  | Entity ID
  | VarInt Enum
+
  | {{Type|Int}}
  | Determines the layout of the remaining packet
+
  | The player's Entity ID (EID).
 
  |-
 
  |-
  ! Event
+
  | Is hardcore
  ! Field Name
+
  | {{Type|Boolean}}
  !
+
  |
!
 
 
  |-
 
  |-
  | 0: enter combat
+
  | Dimension Count
  | ''no fields''
+
  | {{Type|VarInt}}
| ''no fields''
+
  | Size of the following array.
  |  
 
 
  |-
 
  |-
  |rowspan="2"| 1: end combat
+
  | Dimension Names
  | Duration
+
  | {{Type|Array}} of {{Type|Identifier}}
| VarInt
+
  | Identifiers for all dimensions on the server.
  |  
 
 
  |-
 
  |-
  | Entity ID
+
  | Max Players
  | Int
+
  | {{Type|VarInt}}
  |  
+
  | Was once used by the client to draw the player list, but now is ignored.
 
  |-
 
  |-
  |rowspan="3"| 2: entity dead
+
  | View Distance
  | Player ID
+
  | {{Type|VarInt}}
| VarInt
+
  | Render distance (2-32).
  |  
 
 
  |-
 
  |-
  | Entity ID
+
  | Simulation Distance
  | Int
+
  | {{Type|VarInt}}
  |  
+
  | The distance that the client will process specific things, such as entities.
 
  |-
 
  |-
  | Message
+
  | Reduced Debug Info
  | {{Change|String|[[Chat]]}}
+
  | {{Type|Boolean}}
  |  
+
  | If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}. For servers in development, this should almost always be false.
|}
 
 
 
==== Player Position And Look ====
 
 
 
Updates the player's position on the server.
 
 
 
If the distance between the last known position of the player on the server and the new position set by this packet is greater than 100 meters, the client will be kicked for “You moved too quickly :( (Hacking?)”.
 
 
 
Also if the fixed-point number of X or Z is set greater than <code>3.2E7D</code> the client will be kicked for “Illegal position”.
 
 
 
Yaw is measured in degrees, and does not follow classical trigonometry rules. The unit circle of yaw on the XZ-plane starts at (0, 1) and turns counterclockwise, with 90 at (-1, 0), 180 at (0, -1) and 270 at (1, 0). Additionally, yaw is not clamped to between 0 and 360 degrees; any number is valid, including negative numbers and numbers greater than 360.
 
 
 
Pitch is measured in degrees, where 0 is looking straight ahead, -90 is looking straight up, and 90 is looking straight down.
 
 
 
The yaw in degrees of a player standing at point (x0, z0) and looking towards point (x, z) can be calculated with:
 
 
 
l = x-x0
 
w = z-z0
 
c = sqrt( l*l + w*w )
 
alpha1 = -arcsin(l/c)/PI*180
 
alpha2 =  arccos(w/c)/PI*180
 
if alpha2 > 90 then
 
    yaw = 180 - alpha1
 
else
 
    yaw = alpha1
 
 
 
You can get a unit vector from a given yaw/pitch via:
 
 
 
x = -cos(pitch) * sin(yaw)
 
y = -sin(pitch)
 
z =  cos(pitch) * cos(yaw)
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="7"| {{Change|0x08|0x2E}}
+
  | Enable respawn screen
  |rowspan="7"| Play
+
| {{Type|Boolean}}
|rowspan="7"| Client
+
  | Set to false when the doImmediateRespawn gamerule is true.
| X
 
| Double
 
| Absolute or relative position, depending on Flags
 
 
  |-
 
  |-
  | Y
+
  | Do limited crafting
  | Double
+
  | {{Type|Boolean}}
  | Absolute or relative position, depending on Flags
+
  | Whether players can only craft recipes they have already unlocked. Currently unused by the client.
 
  |-
 
  |-
  | Z
+
  | Dimension Type
  | Double
+
  | {{change|Identifier|VarInt}}
  | Absolute or relative position, depending on Flags
+
  | The ID of the type of dimension in the <code>minecraft:dimension_type</code> registry, defined by the Registry Data packet.
 
  |-
 
  |-
  | Yaw
+
  | Dimension Name
  | Float
+
  | {{Type|Identifier}}
  | Absolute or relative rotation on the X Axis, in degrees
+
  | Name of the dimension being spawned into.
 
  |-
 
  |-
  | Pitch
+
  | Hashed seed
  | Float
+
  | {{Type|Long}}
  | Absolute or relative rotation on the Y Axis, in degrees
+
  | First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
 
  |-
 
  |-
  | Flags
+
  | Game mode
  | Byte
+
  | {{Type|Unsigned Byte}}
  | Bit field, see below
+
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
|- style="background-color: #d9ead3;"
 
| Teleport ID
 
| VarInt
 
| Client should confirm this packet with [[#Teleport Confirm|Teleport Confirm]] containing the same Teleport ID
 
|}
 
 
 
About the Flags field:
 
 
 
<Dinnerbone> It's a bitfield, X/Y/Z/Y_ROT/X_ROT. If X is set, the x value is relative and not absolute.
 
 
 
{| class="wikitable"
 
 
  |-
 
  |-
  ! Field
+
  | Previous Game mode
  ! Bit
+
  | {{Type|Byte}}
 +
| -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
 
  |-
 
  |-
  | X
+
  | Is Debug
  | 0x01
+
  | {{Type|Boolean}}
 +
| True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
 
  |-
 
  |-
  | Y
+
  | Is Flat
  | 0x02
+
  | {{Type|Boolean}}
 +
| True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
 
  |-
 
  |-
  | Z
+
  | Has death location
  | 0x04
+
  | {{Type|Boolean}}
 +
| If true, then the next two fields are present.
 
  |-
 
  |-
  | Y_ROT
+
  | Death dimension name
  | 0x08
+
  | {{Type|Optional}} {{Type|Identifier}}
 +
| Name of the dimension the player died in.
 
  |-
 
  |-
  | X_ROT
+
  | Death location
  | 0x10
+
  | {{Type|Optional}} {{Type|Position}}
|}
+
  | The location that the player died at.
 
 
==== Attach Entity ====
 
 
 
This packet is sent when a player has been attached to an entity (e.g. Minecart).
 
 
 
{| class="wikitable"
 
  ! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="3"| {{change|0x1B|0x3A}}
+
  | Portal cooldown
  |rowspan="3"| Play
+
| {{Type|VarInt}}
|rowspan="3"| Client
+
  | The number of ticks until the player can use the portal again.
| Entity ID
 
| Int
 
| Attached entity's EID
 
 
  |-
 
  |-
  | Vehicle ID
+
  | Enforces Secure Chat
  | Int
+
  | {{Type|Boolean}}
| Vechicle's Entity ID. Set to -1 to detach
+
  |
|-style="background-color: #f4cccc; text-decoration: line-through;"
 
| Leash
 
| Boolean
 
  | If true leashes the entity to the vehicle
 
 
  |}
 
  |}
  
==== Entity Equipment ====
+
==== Respawn ====
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,165: Line 887:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="3"| {{Change|0x04|0x3C}}
+
  | rowspan="12"| 0x47
  |rowspan="3"| Play
+
  | rowspan="12"| Play
  |rowspan="3"| Client
+
  | rowspan="12"| Client
  | Entity ID
+
  | Dimension Type
  | VarInt
+
  | {{change|Identifier|VarInt}}
  | Entity's EID
+
  | The ID of the type of dimension in the <code>minecraft:dimension_type</code> registry, defined by the [[Protocol#Registry_Data|Registry Data]] packet.
 
  |-
 
  |-
  | Slot
+
  | Dimension Name
  | {{Change|Short|VarInt}} Enum
+
  | {{Type|Identifier}}
  | Equipment slot. 0: main hand, {{Change||1: off hand}}, {{Change|1–4|2–5}}: armor slot (2: boots, 3: leggings, 4: chestplate, 5: helmet)
+
  | Name of the dimension being spawned into.
 
  |-
 
  |-
  | Item
+
  | Hashed seed
  | [[Slot Data|Slot]]
+
  | {{Type|Long}}
|
+
| First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
|}
 
 
 
==== {{Change||Set Passengers}} ====
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="2"| 0x40
+
  | Game mode
  |rowspan="2"| Play
+
  | {{Type|Unsigned Byte}}
  |rowspan="2"| Client
+
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
| Entity ID
 
| VarInt
 
| Vehicle's EID
 
 
  |-
 
  |-
  | Passengers
+
  | Previous Game mode
  | Array of VarInt
+
  | {{Type|Byte}}
| EIDs of entity's passengers
+
  | -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
  |}
 
 
 
==== Teams ====
 
 
 
Creates and updates teams.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="11"| {{Change|0x3E|0x41}}
+
  | Is Debug
  |rowspan="11"| Play
+
| {{Type|Boolean}}
|rowspan="11"| Client
+
  | True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
| Team Name
 
| String
 
| A unique name for the team. (Shared with scoreboard).
 
|-
 
| Mode
 
| Byte Enum
 
| 0: create team, 1: remove team, 2: update team info; 3: add players to team; 4: remove players from team
 
|-
 
| Team Display Name
 
| Optional String
 
| Only if Mode is 0 or 2.
 
|-
 
| Team Prefix
 
| Optional String
 
| Only if Mode is 0 or 2. Displayed before the players' name that are part of this team.
 
 
  |-
 
  |-
  | Team Suffix
+
  | Is Flat
  | Optional String
+
  | {{Type|Boolean}}
  | Only if Mode is 0 or 2. Displayed after the players' name that are part of this team.
+
  | True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
 
  |-
 
  |-
  | Friendly Fire
+
  | Has death location
  | Optional Byte
+
  | {{Type|Boolean}}
  | Only if Mode is 0 or 2. 0 for off, 1 for on, 3 for seeing friendly invisibles.
+
  | If true, then the next two fields are present.
 
  |-
 
  |-
  | Name Tag Visibility
+
  | Death dimension Name
  | Optional String
+
  | {{Type|Optional}} {{Type|Identifier}}
| Only if Mode is 0 or 2. <code>always</code>, <code>hideForOtherTeams</code>, <code>hideForOwnTeam</code>, <code>never</code>.
+
  | Name of the dimension the player died in.
  |- style="background-color: #d9ead3;"
 
| Collision Rule
 
| Optional String
 
| Only if Mode is 0 or 2. <code>always</code>, <code>pushOtherTeams</code>, <code>pushOwnTeam</code>, <code>never</code>
 
 
  |-
 
  |-
  | Color
+
  | Death location
  | Optional Byte
+
  | {{Type|Optional}} {{Type|Position}}
  | Only if Mode is 0 or 2. Same as [[Chat]] colors.
+
  | The location that the player died at.
 
  |-
 
  |-
  | Player Count
+
  | Portal cooldown
  | Optional VarInt
+
  | {{Type|VarInt}}
  | Only if Mode is 0 or 3 or 4. Number of players in the array.
+
  | The number of ticks until the player can use the portal again.
 
  |-
 
  |-
  | Players
+
  | Data kept
  | Optional Array of String
+
  | {{Type|Byte}}
  | Only if Mode is 0 or 3 or 4. Players to be added/remove from the team. Max 40 characters so may be uuid's later.
+
  | Bit mask. 0x01: Keep attributes, 0x02: Keep metadata. Tells which data should be kept on the client side once the player has respawned.
 +
In the Notchian implementation, this is context dependent:
 +
* normal respawns (after death) keep no data;
 +
* exiting the end poem/credits keeps the attributes;
 +
* other dimension changes (portals or teleports) keep all data.
 
  |}
 
  |}
  
==== {{Change||Sound Effect}} ====
+
==== Store Cookie (play) ====
  
{| class="wikitable"
+
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}}
 
  ! 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="7"| 0x47
+
  | rowspan="3"| 0x6B
  |rowspan="7"| Play
+
  | rowspan="3"| Play
  |rowspan="7"| Client
+
  | rowspan="3"| Client
  | Sound ID
+
  | colspan="2"| Key
| VarInt
+
  | colspan="2"| Identifier
  | ID of hardcoded sound event ([https://gist.github.com/Cybermaxke/7c21d9c818079bacd42b events])
+
  | The identifier of the cookie.
|-
 
| Sound Category
 
| VarInt Enum
 
  | The category that this sound will be played from ([https://gist.github.com/konwboj/7c0c380d3923443e9d55 current categories])
 
|-
 
| Effect Position X
 
| Int
 
| Effect X multiplied by 8
 
|-
 
| Effect Position Y
 
| Int
 
| Effect Y multiplied by 8
 
 
  |-
 
  |-
  | Effect Position Z
+
  | colspan="2"| Payload Length
  | Int
+
  | colspan="2"| VarInt
  | Effect Z multiplied by 8
+
  | Length of the following byte array.
 
  |-
 
  |-
  | Volume
+
  | colspan="2"| Payload
| Float
+
  | colspan="2"| Byte Array (5120)
  | 1.0 is 100%, capped between 0.0 and 1.0 by vanilla client
+
  | The data of the cookie.
|-
 
| Pitch
 
| Unsigned Byte
 
  | Float multiplied by 63.5, capped between 0.5 and 2.0 by vanilla client
 
 
  |}
 
  |}
  
==== Entity Teleport ====
+
==== Transfer (play) ====
  
This packet is sent by the server when an entity moves more than 1024 blocks.
+
Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="7"| {{Change|0x18|0x4A}}
+
  | rowspan="2"| 0x73
  |rowspan="7"| Play
+
  | rowspan="2"| Play
  |rowspan="7"| Client
+
  | rowspan="2"| Client
  | Entity ID
+
  | colspan="2"| Host
| VarInt
+
  | colspan="2"| String
  |  
+
  | The hostname of IP of the server.
|-
 
| X
 
| {{Change|Int|Double}}
 
  |  
 
 
  |-
 
  |-
  | Y
+
  | colspan="2"| Port
| {{Change|Int|Double}}
+
  | colspan="2"| VarInt
|
+
  | The port of the server.
|-
 
| Z
 
| {{Change|Int|Double}}
 
|
 
|-
 
| Yaw
 
  | Angle
 
| New angle, not a delta
 
|-
 
| Pitch
 
| Angle
 
| New angle, not a delta
 
|-
 
| On Ground
 
| Boolean
 
  |  
 
 
  |}
 
  |}
  
==== Entity Properties ====
+
==== Update Attributes ====
 +
 
 +
Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,355: Line 1,003:
 
  ! 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="6"| {{Change|0x20|0x4B}}
+
  | rowspan="6"| 0x71
  |rowspan="6"| Play
+
  | rowspan="6"| Play
  |rowspan="6"| Client
+
  | rowspan="6"| Client
  |colspan="2"| Entity ID
+
  | colspan="2"| Entity ID
  |colspan="2"| VarInt
+
  | colspan="2"| VarInt
  |  
+
  |
 
  |-
 
  |-
  |colspan="2"| Number Of Properties
+
  | colspan="2"| Number Of Properties
  |colspan="2"| Int
+
  | colspan="2"| VarInt
  | Number of elements in the following array
+
  | Number of elements in the following array.
 
  |-
 
  |-
  |rowspan="4"| Property
+
  | rowspan="4"| Property
  | Key
+
  | {{change|Key|Id}}
  |rowspan="4"| Array
+
  | rowspan="4"| Array
  | String
+
  | {{change|Identifier|VarInt Enum}}
  | See below
+
  | See below.
 
  |-
 
  |-
 
  | Value
 
  | Value
 
  | Double
 
  | Double
  | See below
+
  | See below.
 
  |-
 
  |-
 
  | Number Of Modifiers
 
  | Number Of Modifiers
 
  | VarInt
 
  | VarInt
  | Number of elements in the following array
+
  | Number of elements in the following array.
 
  |-
 
  |-
 
  | Modifiers
 
  | Modifiers
Line 1,390: Line 1,038:
  
 
Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
 
Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
 +
 +
These changed between 24w03b and 24w13a, TODO: Update this
  
 
{| class="wikitable"
 
{| class="wikitable"
 
  |-
 
  |-
 +
! Id
 
  ! Key
 
  ! Key
 
  ! Default
 
  ! Default
Line 1,399: Line 1,050:
 
  ! Label
 
  ! Label
 
  |-
 
  |-
  | generic.maxHealth
+
| 0
 +
  | generic.armor
 +
| 0.0
 +
| 0.0
 +
| 30.0
 +
| Armor.
 +
|-
 +
| 1
 +
| generic.armor_toughness
 +
| 0.0
 +
| 0.0
 
  | 20.0
 
  | 20.0
 +
| Armor Toughness.
 +
|-
 +
| 2
 +
| generic.attack_damage
 +
| 2.0
 
  | 0.0
 
  | 0.0
  | {{Change|Double.MaxValue|1024.0}}
+
  | 2048.0
  | Max Health
+
  | Attack Damage.
 
  |-
 
  |-
  | generic.followRange
+
| 3
 +
  | generic.attack_knockback
 +
| 0.0
 +
| 0.0
 +
| 5.0
 +
| Attack Knockback.
 +
|-
 +
| 4
 +
| generic.attack_speed
 +
| 4.0
 +
| 0.0
 +
| 1024.0
 +
| Attack Speed.
 +
|- {{added}}
 +
| 5
 +
| generic.block_interaction_range
 +
| 4.5
 +
| 0.0
 +
| 64.0
 +
| Block Interaction Range.
 +
|- {{added}}
 +
| 6
 +
| generic.entity_interaction_range
 +
| 3.0
 +
| 0.0
 +
| 64.0
 +
| Entity Interaction Range.
 +
|-
 +
| 7
 +
| generic.flying_speed
 +
| 0.4
 +
| 0.0
 +
| 1024.0
 +
| Flying Speed.
 +
|-
 +
| 8
 +
| generic.follow_range
 
  | 32.0
 
  | 32.0
 
  | 0.0
 
  | 0.0
 
  | 2048.0
 
  | 2048.0
  | Follow Range
+
  | Follow Range.
 +
|-
 +
| 9
 +
| horse.jump_strength
 +
| 0.7
 +
| 0.0
 +
| 2.0
 +
| Jump Strength.
 
  |-
 
  |-
  | generic.knockbackResistance
+
| 10
  | 0.0  
+
  | generic.knockback_resistance
 +
  | 0.0
 
  | 0.0
 
  | 0.0
 
  | 1.0
 
  | 1.0
  | Knockback Resistance
+
  | Knockback Resistance.
 
  |-
 
  |-
  | generic.movementSpeed
+
  | 11
  | 0.699999988079071
+
  | generic.luck
 
  | 0.0
 
  | 0.0
  | {{Change|Double.MaxValue|1024.0}}
+
  | -1024.0
  | Movement Speed
+
| 1024.0
 +
  | Luck.
 
  |-
 
  |-
  | generic.attackDamage
+
  | 12
  | 2.0
+
  | generic.max_absorption
 
  | 0.0
 
  | 0.0
| {{Change|Double.MaxValue|2048.0}}
 
| {{Change||Attack Damage}}
 
|- style="background-color: #d9ead3;"
 
| generic.attackSpeed
 
| 4.0
 
 
  | 0.0
 
  | 0.0
 +
| 2048.0
 +
| Max Absorption.
 +
|-
 +
| 13
 +
| generic.max_health
 +
| 20.0
 +
| 1.0
 
  | 1024.0
 
  | 1024.0
  | Attack Speed
+
  | Max Health.
 
  |-
 
  |-
  | horse.jumpStrength
+
  | 14
 +
| generic.movement_speed
 
  | 0.7
 
  | 0.7
 
  | 0.0
 
  | 0.0
  | 2.0
+
  | 1024.0
  | Jump Strength
+
  | Movement Speed.
 +
|- {{added}}
 +
| 15
 +
| generic.scale
 +
| 1.0
 +
| 0.0625
 +
| 16.0
 +
| Scale.
 
  |-
 
  |-
  | zombie.spawnReinforcements
+
| 16
 +
  | zombie.spawn_reinforcements
 
  | 0.0
 
  | 0.0
 
  | 0.0
 
  | 0.0
 
  | 1.0
 
  | 1.0
  | Spawn Reinforcements Chance
+
  | Spawn Reinforcements Chance.
 +
|- {{added}}
 +
| 17
 +
| generic.step_height
 +
| 0.6
 +
| 0.0
 +
| 10.0
 +
| Step Height.
 
  |}
 
  |}
  
Line 1,458: Line 1,187:
 
  | UUID
 
  | UUID
 
  | UUID
 
  | UUID
  |  
+
  |
 
  |-
 
  |-
 
  | Amount
 
  | Amount
 
  | Double
 
  | Double
  |  
+
  | May be positive or negative.
 
  |-
 
  |-
 
  | Operation
 
  | Operation
 
  | Byte
 
  | 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 ====
 
==== Entity Effect ====
Line 1,479: Line 1,216:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="5"| {{Change|0x1D|0x4C}}
+
  | rowspan="7"| 0x72
  |rowspan="5"| Play
+
  | rowspan="7"| Play
  |rowspan="5"| Client
+
  | rowspan="7"| Client
 
  | Entity ID
 
  | Entity ID
 
  | VarInt
 
  | VarInt
  |  
+
  |
 
  |-
 
  |-
 
  | Effect ID
 
  | Effect ID
  | Byte
+
  | VarInt
  | See {{Minecraft Wiki|Status effect#List of effects|this table}}
+
  | See {{Minecraft Wiki|Status effect#Effect list|this table}}.
 
  |-
 
  |-
 
  | Amplifier
 
  | Amplifier
 
  | Byte
 
  | Byte
  | Notchian client displays effect level as Amplifier + 1
+
  | Notchian client displays effect level as Amplifier + 1.
 
  |-
 
  |-
 
  | Duration
 
  | Duration
 
  | VarInt
 
  | VarInt
  | Seconds
+
  | Duration in ticks. (-1 for infinite)
 
  |-
 
  |-
  | Hide Particles
+
  | Flags
  | {{Change|Boolean|Byte}}
+
  | Byte
  |  
+
| Bit field, see below.
 +
|- {{removed}}
 +
| Has Factor Data
 +
| Boolean
 +
| Used in DARKNESS effect
 +
|- {{removed}}
 +
  | Factor Codec
 +
| NBT Tag
 +
| See below
 
  |}
 
  |}
  
==== {{Change|Map Chunk Bulk|}} ====
+
{{Need Info|What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?}}
  
Replaced by multiple [[#Chunk Data|Chunk Data]] packets.
+
Within flags:
  
==== {{Change|Update Entity NBT|}} ====
+
* 0x01: Is ambient - was the effect spawned from a beacon?  All beacon-generated effects are ambient.  Ambient effects use a different icon in the HUD (blue border rather than gray).  If all effects on an entity are ambient, the [[Entity_metadata#Living Entity|"Is potion effect ambient" living metadata field]] should be set to true.  Usually should not be enabled.
 +
* 0x02: Show particles - should all particles from this effect be hidden?  Effects with particles hidden are not included in the calculation of the effect color, and are not rendered on the HUD (but are still rendered within the inventory).  Usually should be enabled.
 +
* 0x04: Show icon - should the icon be displayed on the client?  Usually should be enabled.
 +
* {{change||0x08: Blend - should the effect's hard-coded blending be applied?  Currently only used in the DARKNESS effect to apply extra void fog and adjust the gamma value for lighting.}}
  
Wasn't used for anything.
+
{{change|Factor Data|}}
 
+
{| class="wikitable" {{removed}}
=== Serverbound ===
+
  !Name
 
+
  !Type
==== {{Change||Teleport Confirm}} ====
+
  !style="width: 250px;" colspan="2"| Notes
 
 
Sent by client as confirmation of [[#Player Position And Look|Player Position And Look]] packet.
 
 
 
{| class="wikitable"
 
  ! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
  ! Field Type
 
  ! Notes
 
 
  |-
 
  |-
  |rowspan="1"| 0x00
+
  | padding_duration
  |rowspan="1"| Play
+
  | TAG_INT
  |rowspan="1"| Server
+
  |
| Teleport ID
 
| VarInt
 
|
 
|}
 
 
 
==== Tab-Complete ====
 
 
 
Sent when the user presses ''tab'' while writing text.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="4"| {{Change|0x14|0x01}}
+
  | factor_start
|rowspan="4"| Play
+
  | TAG_FLOAT
|rowspan="4"| Server
+
  |
| Text
 
| String
 
| All text behind the cursor (e.g. to the left of the cursor in left-to-right languages like English)
 
|- style="background-color: #d9ead3;"
 
| Assume Command
 
  | Boolean
 
  | If true, the server will parse Text as a command even if it doesn't start with a <code>/</code>. Used in the command block GUI.
 
 
  |-
 
  |-
  | Has Position
+
  | factor_target
  | Boolean
+
  | TAG_FLOAT
  |  
+
  |
 
  |-
 
  |-
  | Looked At Block
+
  | factor_current
  | Optional Position
+
  | TAG_FLOAT
  | The position of the block being looked at. Only sent if Has Position is true.
+
  |
|}
 
 
 
==== Client Status ====
 
 
 
Sent when the client is ready to complete login and when the client is ready to respawn after death.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="1"| {{Change|0x16|0x03}}
+
  | effect_changed_timestamp
  |rowspan="1"| Play
+
  | TAG_INT
|rowspan="1"| Server
 
| Action ID
 
| VarInt Enum
 
| See below
 
|}
 
 
 
''Action ID'' values:
 
 
 
{| class="wikitable"
 
 
  |-
 
  |-
  ! Action ID
+
  | factor_previous_frame
  ! Action
+
  | TAG_FLOAT
 
  |-
 
  |-
  | 0
+
  | had_effect_last_tick
  | Perform respawn
+
  | TAG_BOOLEAN
|-
 
| 1
 
| Request stats
 
|-
 
| 2
 
| {{Change|''Taking Inventory'' achievement|Open Inventory}}
 
 
  |}
 
  |}
  
==== Client Settings ====
+
=== Serverbound ===
  
Sent when the player connects, or when settings are changed.
+
==== Chat Command ====
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,610: Line 1,297:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="6"| {{Change|0x15|0x04}}
+
  | rowspan="8"| 0x04
  |rowspan="6"| Play
+
  | rowspan="8"| Play
  |rowspan="6"| Server
+
  | rowspan="8"| Server
  | Locale
+
  | colspan="2"| Command
  | String
+
  | colspan="2"| {{Type|String}} (256)
  | e.g. en_GB
+
  | colspan="2"| The command typed by the client.
  |-
+
|- {{removed}}
  | View Distance
+
| colspan="2"| Timestamp
  | Byte
+
| colspan="2"| {{Type|Long}}
  | Client-side render distance, in chunks
+
| colspan="2"| The timestamp that the command was executed.
  |-
+
  |- {{removed}}
  | Chat Mode
+
  | colspan="2"| Salt
  | {{Change|Byte|VarInt}} Enum
+
  | colspan="2"| {{Type|Long}}
  | 0: enabled, 1: commands only, 2: hidden
+
  | colspan="2"| The salt for the following argument signatures.
  |-
+
  |- {{removed}}
  | Chat Colors
+
  | colspan="2"| Array length
  | Boolean
+
  | colspan="2"| {{Type|VarInt}}
  | “Colors” multiplayer setting
+
  | colspan="2"| Number of entries in the following array. The maximum length in Notchian server is 8.
  |-
+
  |- {{removed}}
  | Displayed Skin Parts
+
| rowspan="2"| Array of argument signatures
  | Unsigned Byte
+
  | Argument name
  | Skin parts, see note below
+
| rowspan="2"| {{Type|Array}} (8)
  |- style="background-color: #d9ead3;"
+
  | {{Type|String}} (16)
  | Main Hand
+
  | The name of the argument that is signed by the following signature.
  | VarInt Enum
+
  |- {{removed}}
  | 0: Left, 1: Right
+
  | Signature
 +
  | {{Type|Byte Array}} (256)
 +
  | The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
 +
  |- {{removed}}
 +
| colspan="2"| Message Count
 +
| colspan="2"| {{Type|VarInt}}
 +
| colspan="2"|
 +
|- {{removed}}
 +
  | colspan="2"| Acknowledged
 +
  | colspan="2"| {{Type|Fixed BitSet}} (20)
 +
  | colspan="2"|
 
  |}
 
  |}
  
''Displayed Skin Parts'' flags:
 
  
* Bit 0 (0x01): Cape enabled
+
==== Signed Chat Command ====
* Bit 1 (0x02): Jacket enabled
 
* Bit 2 (0x04): Left Sleeve enabled
 
* Bit 3 (0x08): Right Sleeve enabled
 
* Bit 4 (0x10): Left Pants Leg enabled
 
* Bit 5 (0x20): Right Pants Leg enabled
 
* Bit 6 (0x40): Hat enabled
 
  
The most significant bit (bit 7, 0x80) appears to be unused.
+
{| class="wikitable" {{added}}
 
 
==== Use Entity ====
 
 
 
This packet is sent from the client to the server when the client attacks or right-clicks another entity (a player, minecart, etc).
 
 
 
A Notchian server only accepts this packet if the entity being attacked/used is visible without obstruction and within a 4-unit radius of the player's position.
 
 
 
Note that middle-click in creative mode is interpreted by the client and sent as a [[#Creative Inventory Action|Creative Inventory Action]] packet instead.
 
 
 
{| 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="6"| {{Change|0x02|0x0A}}
+
  | rowspan="8"| 0x05
  |rowspan="6"| Play
+
  | rowspan="8"| Play
  |rowspan="6"| Server
+
  | rowspan="8"| Server
  | Target
+
  | colspan="2"| Command
  | VarInt
+
  | colspan="2"| String(256)
  |  
+
  | The command typed by the client.
 
  |-
 
  |-
  | Type
+
  | colspan="2"| Timestamp
  | VarInt Enum
+
  | colspan="2"| Long
  | 0: interact, 1: attack, 2: interact at
+
  | The timestamp that the command was executed. Milliseconds since the Unix epoch.
 
  |-
 
  |-
  | Target X
+
  | colspan="2"| Salt
  | Optional Float
+
  | colspan="2"| Long
  | Only if Type is interact at
+
  | The salt for the following argument signatures.
 
  |-
 
  |-
  | Target Y
+
  | colspan="2"| Argument Signature Count
  | Optional Float
+
  | colspan="2"| VarInt
  | Only if Type is interact at
+
  | Number of elements in the following array. The maximum length in Notchian server is 8.
 
  |-
 
  |-
  | Target Z
+
  | rowspan="2"| Argument Signatures
| Optional Float
+
  | Name
| Only if Type is interact at
+
  | rowspan="2"| Array
|- style="background-color: #d9ead3;"
+
  | String(16)
| Hand
+
  | The name of the argument that is signed by the following signature.
| Optional VarInt Enum
 
  | Only if Type is interact or interact at; 0: main hand, 1: off hand
 
|}
 
 
 
==== {{Change||Vehicle Move (serverbound)}} ====
 
 
 
Sent when a player moves in a vehicle. Fields are the same as in [[#Player Position And Look|Player Position And Look]]. Note that all fields use absolute positioning and do not allow for relative positioning.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
  |rowspan="7"| 0x10
 
  |rowspan="7"| Play
 
  |rowspan="7"| Server
 
| X
 
| Double
 
| Absolute position (X coordinate)
 
 
  |-
 
  |-
  | Y
+
  | Signature
  | Double
+
  | ByteArray(256)
  | Absolute position (Y coordinate)
+
  | The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
 
  |-
 
  |-
  | Z
+
  | colspan="2"| Seen Messages Offset
| Double
+
  | colspan="2"| VarInt
| Absolute position (Z coordinate)
 
|-
 
| Yaw
 
| Float
 
| Absolute rotation on the vertical Axis, in degrees
 
|-
 
| Pitch
 
| Float
 
| Absolute rotation on the horizontal Axis, in degrees
 
|}
 
 
 
==== {{Change||Steer Boat}} ====
 
 
 
 
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x11
 
  |rowspan="2"| Play
 
|rowspan="2"| Server
 
| Boolean
 
| Unknown
 
 
  |
 
  |
 
  |-
 
  |-
  | Boolean
+
  | colspan="2"| Seen Messages Acknowledged
  | Unknown 2
+
  | colspan="2"| Fixed BitSet(20)
 
  |
 
  |
 
  |}
 
  |}
  
==== Player Digging ====
+
==== Cookie Response (play) ====
 
 
Sent when the player mines a block. A Notchian server only accepts digging packets with coordinates within a 6-unit radius of the player's position.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="3"| {{Change|0x07|0x13}}
 
|rowspan="3"| Play
 
|rowspan="3"| Server
 
| Status
 
| Byte Enum
 
| The action the player is taking against the block (see below)
 
|-
 
| Location
 
| Position
 
| Block position
 
|-
 
| Face
 
| Byte Enum
 
| The face being hit (see below)
 
|}
 
 
 
Status can be one of seven values:
 
 
 
{| class="wikitable"
 
! Value
 
! Meaning
 
! Notes
 
|-
 
| 0
 
| Started digging
 
|
 
|-
 
| 1
 
| Cancelled digging
 
| Sent when the player lets go of the Mine Block key (default: left click)
 
|-
 
| 2
 
| Finished digging
 
| Sent when the client thinks it is finished
 
|-
 
| 3
 
| Drop item stack
 
| Triggered by using the Drop Item key (default: Q) with the modifier to drop the entire selected stack (default: depends on OS). Location is always set to 0/0/0, Face is always set to -Y.
 
|-
 
| 4
 
| Drop item
 
| Triggered by using the Drop Item key (default: Q). Location is always set to 0/0/0, Face is always set to -Y.
 
|-
 
| 5
 
| Shoot arrow / finish eating
 
| Location is always set to 0/0/0, Face is always set to Special.
 
|- style="background-color: #d9ead3;"
 
| 6
 
| Swap item in hand
 
| Used to swap or assign an item to the second hand. Location is always set to 0/0/0, Face is always set to -Y.
 
|}
 
 
 
The Face field can be one of the following values, representing the face being hit (or the Special value used for “shoot arrow / finish eating”):
 
 
 
{| class="wikitable"
 
|-
 
! Value
 
! Offset
 
! Face
 
|-
 
| 0
 
| -Y
 
| Bottom
 
|-
 
| 1
 
| +Y
 
| Top
 
|-
 
| 2
 
| -Z
 
| North
 
|-
 
| 3
 
| +Z
 
| South
 
|-
 
| 4
 
| -X
 
| West
 
|-
 
| 5
 
| +X
 
| East
 
|-
 
| 255
 
| —
 
| Special
 
|}
 
 
 
==== Entity Action ====
 
  
Sent at least when crouching, leaving a bed, or sprinting. To send action animation to client use 0x28. The client will send this with Action ID = 3 when “Leave Bed” is clicked.
+
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="3"| {{Change|0x0B|0x14}}
+
  | rowspan="4"| 0x11
  |rowspan="3"| Play
+
  | rowspan="4"| Play
  |rowspan="3"| Server
+
  | rowspan="4"| Server
  | Entity ID
+
  | colspan="2"| Key
| VarInt
+
  | colspan="2"| Identifier
  | Player ID
+
  | The identifier of the cookie.
|-
 
| Action ID
 
| VarInt Enum
 
  | The ID of the action, see below
 
|-
 
| Jump Boost
 
| VarInt
 
| Horse jump boost. Ranged from 0 to 100.
 
|}
 
 
 
Action ID can be one of the following values:
 
 
 
{| class="wikitable"
 
! ID
 
! Action
 
|-
 
| 0
 
| Crouch
 
 
  |-
 
  |-
  | 1
+
  | colspan="2"| Has Payload
  | Uncrouch
+
| colspan="2"| Boolean
 +
  | The payload is only present if the cookie exists on the client.
 
  |-
 
  |-
  | 2
+
  | colspan="2"| Payload Length
  | Leave bed
+
| colspan="2"| Optional VarInt
 +
  | Length of the following byte array.
 
  |-
 
  |-
  | 3
+
  | colspan="2"| Payload
| Start sprinting
+
  | colspan="2"| Optional Byte Array (5120)
|-
+
  | The data of the cookie, if any.
| 4
 
| Stop sprinting
 
|-
 
| 5
 
| Start Jump with horse
 
|-
 
| 6
 
| Stop Jump with horse
 
|-
 
| 7
 
  | Open ridden horse inventory
 
|-
 
| 8
 
  | Start Elytra Flying
 
 
  |}
 
  |}
  
“Open inventory” is now sent via the [[#Client Status|Client Status]] packet.
+
==== Debug Sample Subscription ====
  
==== Update Sign ====
+
{| class="wikitable" {{added}}
 
 
This message is sent from the client to the server when the “Done” button is pushed after placing a sign.
 
 
 
{| class="wikitable"
 
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 1,935: Line 1,430:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="5"| {{Change|0x12|0x19}}
+
  | 0x13
  |rowspan="5"| Play
+
  | Play
  |rowspan="5"| Server
+
  | Server
  | Location
+
  | Sample Type
| Position
 
| Block Coordinates
 
|-
 
| Line 1
 
| {{Change|[[Chat]]|String}}
 
| First line of text in the sign
 
|-
 
| Line 2
 
| {{Change|[[Chat]]|String}}
 
| Second line of text in the sign
 
|-
 
| Line 3
 
| {{Change|[[Chat]]|String}}
 
| Third line of text in the sign
 
|-
 
| Line 4
 
| {{Change|[[Chat]]|String}}
 
| Fourth line of text in the sign
 
|}
 
 
 
==== Animation ====
 
 
 
Sent when the player's arm swings.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| {{Change|0x0A|0x1A}}
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
|style="background-color: #d9ead3;"| Hand
 
|style="background-color: #d9ead3;"| VarInt Enum
 
|style="background-color: #d9ead3;"| Hand used for the animation
 
|}
 
 
 
==== Player Block Placement ====
 
 
 
{| class="wikitable"
 
|-
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="7"| {{Change|0x08|0x1C}}
 
|rowspan="7"| Play
 
|rowspan="7"| Server
 
| Location
 
| Position
 
| Block position
 
|-
 
| Face
 
| {{Change|Byte|VarInt}} Enum
 
| The face on which the block is placed (as documented at [[#Player Digging|Player Digging]])
 
|- style="background-color: #f4cccc; text-decoration: line-through;"
 
| Held Item
 
| [[Slot Data|Slot]]
 
|
 
|- style="background-color: #d9ead3;"
 
| Hand
 
| VarInt Enum
 
| The hand from which the block is placed; 0: main hand, 1: off hand
 
|-
 
| Cursor Position X
 
| Unsigned Byte
 
| The position of the crosshair on the block, from 0 to 15 increasing from west to east
 
|-
 
| Cursor Position Y
 
| Unsigned Byte
 
| The position of the crosshair on the block, from 0 to 15 increasing from bottom to top
 
|-
 
| Cursor Position Z
 
| Unsigned Byte
 
| The position of the crosshair on the block, from 0 to 15 increasing from north to south
 
|}
 
 
 
In normal operation (i.e. placing a block), this packet is sent once, with the values set normally.
 
 
 
The Cursor Position X/Y/Z fields (also known as in-block coordinates) are calculated using raytracing. The unit corresponds to one 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 0–7) or as a top slab (values 8–15). The Cursor Position Z should be 15 since the player was looking at the southernmost part of the block.
 
 
 
This packet has a special case where X, Y, Z, and Direction are all -1. (Note that Y is unsigned so set to 255.) This special packet indicates that the currently held item for the player should have its state updated such as eating food, pulling back bows, using buckets, etc.
 
 
 
Special note on using buckets: When using buckets, the Notchian client might send two packets: first a normal and then a special case. The first normal packet is sent when you're looking at a block (e.g. the water you want to scoop up). This normal packet does not appear to do anything with a Notchian server. The second, special case packet appears to perform the action — based on current position/orientation and with a distance check — it appears that buckets can only be used within a radius of 6 units.
 
 
 
==== {{Change||Use Item}} ====
 
 
 
Sent when pressing the Use Item key (default: right click) with an item in hand.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| 0x1D
 
|rowspan="1"| Play
 
|rowspan="1"| Server
 
| Hand
 
 
  | VarInt Enum
 
  | VarInt Enum
  | Hand used for the animation
+
  | The type of debug sample to subscribe to. Currently always 0 (TICK_TIME).
 
  |}
 
  |}
  
== Status ==
+
[[Category:Minecraft Modern]]
 
 
=== Clientbound ===
 
 
 
No changes so far.
 
 
 
=== Serverbound ===
 
 
 
No changes so far.
 
 
 
== Login ==
 
 
 
=== Clientbound ===
 
 
 
No changes so far.
 
 
 
=== Serverbound ===
 
 
 
No changes so far.
 

Revision as of 19:57, 25 April 2024

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

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

Contents

Data types

No changes so far.

Packets

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

New/modified data types

No changes so far.

Entity Metadata

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

Living Entity

TODO: This has changed to use the PARTICLES attribute

Wolf

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

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

Armadillo

Extends Animal.

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

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Handshake

Serverbound

Handshake

This causes the server to switch into the target state.

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

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

Encryption Request

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

Cookie Request (login)

Requests a cookie that was previously stored.

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

Serverbound

Cookie Response (login)

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

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

Configuration

Clientbound

Cookie Request (configuration)

Requests a cookie that was previously stored.

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

Reset Chat

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

Registry Data

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

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

Store Cookie (configuration)

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

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

Transfer (configuration)

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

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

Clientbound Known Packs

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

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

Serverbound

Cookie Response (configuration)

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

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

Serverbound Known Packs

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

Play

Clientbound

Cookie Request (play)

Requests a cookie that was previously stored.

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

Debug Sample

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

Login (play)

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

Respawn

Packet ID State Bound To Field Name Field Type Notes
0x47 Play Client Dimension Type Identifier VarInt The ID of the type of dimension in the minecraft:dimension_type registry, defined by the Registry Data packet.
Dimension Name Identifier Name of the dimension being spawned into.
Hashed seed Long First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
Game mode Unsigned Byte 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
Previous Game mode Byte -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
Is Debug Boolean True if the world is a debug mode world; debug mode worlds cannot be modified and have predefined blocks.
Is Flat Boolean True if the world is a superflat world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
Has death location Boolean If true, then the next two fields are present.
Death dimension Name Optional Identifier Name of the dimension the player died in.
Death location Optional Position The location that the player died at.
Portal cooldown VarInt The number of ticks until the player can use the portal again.
Data kept Byte Bit mask. 0x01: Keep attributes, 0x02: Keep metadata. Tells which data should be kept on the client side once the player has respawned.

In the Notchian implementation, this is context dependent:

  • normal respawns (after death) keep no data;
  • exiting the end poem/credits keeps the attributes;
  • other dimension changes (portals or teleports) keep all data.

Store Cookie (play)

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

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

Transfer (play)

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

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

Update Attributes

Sets attributes on the given entity.

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

Known Key values (see also Attribute#Modifiers):

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

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

Modifier Data structure:

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

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

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

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

Entity Effect

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

Chat Command

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


Signed Chat Command

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

Cookie Response (play)

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

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

Debug Sample Subscription

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