Difference between revisions of "Pre-release protocol"

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(Fix packet IDs in subsections for Explosion, Join Game, {End, Enter, Death} Combat Event, Destroy Entity, Resource Pack Send, Set Title {SubTitle, Text, Times}, Tags, and Click Window.)
(→‎Entity Metadata: Merge changes from stable docs to incorporate new metadata type templates. Fix my earlier mistake on Pose in the process.)
 
(118 intermediate revisions by 15 users not shown)
Line 1: Line 1:
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.16.5, protocol 754]]) to the current pre-release (currently [[Protocol version numbers|1.17-rc2, protocol {{Snapshot PVN|1073741859}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
+
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.4, protocol 765]]) to the current pre-release (currently [[Protocol version numbers|24w03b, protocol {{Snapshot PVN|1073741996}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
  
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
Line 18: Line 18:
 
  !colspan="2"| Documentation
 
  !colspan="2"| Documentation
 
  |-
 
  |-
!colspan="4"| Play clientbound
+
!colspan="4"| Handshake serverbound
{{PacketList|0x05|Sculk Vibration Signal|rel=added}}
+
{{PacketList|0x00|Handshake}}
{{PacketList|{{change|0x05|0x06}}|Entity Animation (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x06|0x07}}|Statistics|pre=unchanged}}
 
{{PacketList|{{change|0x07|0x08}}|Acknowledge Player Digging|pre=unchanged}}
 
{{PacketList|{{change|0x08|0x09}}|Block Break Animation|pre=unchanged}}
 
{{PacketList|{{change|0x09|0x0A}}|Block Entity Data|pre=unchanged}}
 
{{PacketList|{{change|0x0A|0x0B}}|Block Action|pre=unchanged}}
 
{{PacketList|{{change|0x0B|0x0C}}|Block Change|pre=unchanged}}
 
{{PacketList|{{change|0x0C|0x0D}}|Boss Bar|pre=unchanged}}
 
{{PacketList|{{change|0x0D|0x0E}}|Server Difficulty|pre=unchanged}}
 
{{PacketList|{{change|0x0E|0x0F}}|Chat Message (clientbound)|pre=unchanged}}
 
{{PacketList|0x10|Clear Titles|rel=added}}
 
{{PacketList|{{change|0x0F|0x11}}|Tab-Complete (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x10|0x12}}|Declare Commands|pre=unchanged}}
 
{{PacketList|0x11|Window Confirmation (clientbound)|pre=removed}}
 
{{PacketList|{{change|0x12|0x13}}|Close Window (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x13|0x14}}|Window Items|pre=unchanged}}
 
{{PacketList|{{change|0x14|0x15}}|Window Property|pre=unchanged}}
 
{{PacketList|{{change|0x15|0x16}}|Set Slot|pre=unchanged}}
 
{{PacketList|{{change|0x16|0x17}}|Set Cooldown|pre=unchanged}}
 
{{PacketList|{{change|0x17|0x18}}|Plugin Message (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x18|0x19}}|Named Sound Effect|pre=unchanged}}
 
{{PacketList|{{change|0x19|0x1A}}|Disconnect (play)|pre=unchanged}}
 
{{PacketList|{{change|0x1A|0x1B}}|Entity Status|pre=unchanged}}
 
{{PacketList|{{change|0x1B|0x1C}}|Explosion}}
 
{{PacketList|{{change|0x1C|0x1D}}|Unload Chunk|pre=unchanged}}
 
{{PacketList|{{change|0x1D|0x1E}}|Change Game State|pre=unchanged}}
 
{{PacketList|{{change|0x1E|0x1F}}|Open Horse Window|pre=unchanged}}
 
{{PacketList|0x20|Initialize World Border|rel=added}}
 
{{PacketList|{{change|0x1F|0x21}}|Keep Alive (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x20|0x22}}|Chunk Data}}
 
{{PacketList|{{change|0x21|0x23}}|Effect|pre=unchanged}}
 
{{PacketList|{{change|0x22|0x24}}|Particle|pre=unchanged}}
 
{{PacketList|{{change|0x23|0x25}}|Update Light}}
 
{{PacketList|{{change|0x24|0x26}}|Join Game}}
 
{{PacketList|{{change|0x25|0x27}}|Map Data}}
 
{{PacketList|{{change|0x26|0x28}}|Trade List|pre=unchanged}}
 
{{PacketList|{{change|0x27|0x29}}|Entity Position|pre=unchanged}}
 
{{PacketList|{{change|0x28|0x2A}}|Entity Position and Rotation|pre=unchanged}}
 
{{PacketList|{{change|0x29|0x2B}}|Entity Rotation|pre=unchanged}}
 
{{PacketList|0x2A|Entity Movement|pre=removed}}
 
{{PacketList|{{change|0x2B|0x2C}}|Vehicle Move (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x2C|0x2D}}|Open Book|pre=unchanged}}
 
{{PacketList|{{change|0x2D|0x2E}}|Open Window|pre=unchanged}}
 
{{PacketList|{{change|0x2E|0x2F}}|Open Sign Editor|pre=unchanged}}
 
{{PacketList|0x30|Ping|rel=added}}
 
{{PacketList|{{change|0x2F|0x31}}|Craft Recipe Response|pre=unchanged}}
 
{{PacketList|{{change|0x30|0x32}}|Player Abilities (clientbound)|pre=unchanged}}
 
{{PacketList|0x31|Combat Event|pre=removed}}
 
{{PacketList|0x33|End Combat Event|rel=added}}
 
{{PacketList|0x34|Enter Combat Event|rel=added}}
 
{{PacketList|0x35|Death Combat Event|rel=added}}
 
{{PacketList|{{change|0x32|0x36}}|Player Info|pre=unchanged}}
 
{{PacketList|{{change|0x33|0x37}}|Face Player|pre=unchanged}}
 
{{PacketList|0x36|Destroy Entities|pre=removed}}
 
{{PacketList|{{change|0x34|0x38}}|Player Position And Look (clientbound)}}
 
{{PacketList|{{change|0x35|0x39}}|Unlock Recipes|pre=unchanged}}
 
{{PacketList|0x3A|Destroy Entity|rel=added}}
 
{{PacketList|{{change|0x37|0x3B}}|Remove Entity Effect|pre=unchanged}}
 
{{PacketList|{{change|0x38|0x3C}}|Resource Pack Send}}
 
{{PacketList|{{change|0x39|0x3D}}|Respawn|pre=unchanged}}
 
{{PacketList|{{change|0x3A|0x3E}}|Entity Head Look|pre=unchanged}}
 
{{PacketList|{{change|0x3B|0x3F}}|Multi Block Change|pre=unchanged}}
 
{{PacketList|{{change|0x3C|0x40}}|Select Advancement Tab|pre=unchanged}}
 
{{PacketList|0x41|Action Bar|rel=added}}
 
{{PacketList|0x42|World Border Center|rel=added}}
 
{{PacketList|0x43|World Border Lerp Size|rel=added}}
 
{{PacketList|0x44|World Border Size |rel=added}}
 
{{PacketList|0x45|World Border Warning Delay|rel=added}}
 
{{PacketList|0x46|World Border Warning Reach|rel=added}}
 
{{PacketList|{{change|0x3E|0x47}}|Camera|pre=unchanged}}
 
{{PacketList|{{change|0x3F|0x48}}|Held Item Change (clientbound)|pre=unchanged}}
 
{{PacketList|{{change|0x40|0x49}}|Update View Position|pre=unchanged}}
 
{{PacketList|{{change|0x41|0x4A}}|Update View Distance|pre=unchanged}}
 
{{PacketList|{{change|0x42|0x4B}}|Spawn Position}}
 
{{PacketList|{{change|0x43|0x4C}}|Display Scoreboard|pre=unchanged}}
 
{{PacketList|{{change|0x44|0x4D}}|Entity Metadata|pre=unchanged}}
 
{{PacketList|{{change|0x45|0x4E}}|Attach Entity|pre=unchanged}}
 
{{PacketList|{{change|0x46|0x4F}}|Entity Velocity|pre=unchanged}}
 
{{PacketList|{{change|0x47|0x50}}|Entity Equipment|pre=unchanged}}
 
{{PacketList|0x4F|Title|pre=removed}}
 
{{PacketList|{{change|0x48|0x51}}|Set Experience|pre=unchanged}}
 
{{PacketList|{{change|0x49|0x52}}|Update Health|pre=unchanged}}
 
{{PacketList|{{change|0x4A|0x53}}|Scoreboard Objective|pre=unchanged}}
 
{{PacketList|{{change|0x4B|0x54}}|Set Passengers|pre=unchanged}}
 
{{PacketList|{{change|0x4C|0x55}}|Teams|pre=unchanged}}
 
{{PacketList|{{change|0x4D|0x56}}|Update Score|pre=unchanged}}
 
{{PacketList|0x57|Set Title SubTitle|rel=added}}
 
{{PacketList|{{change|0x4E|0x58}}|Time Update|pre=unchanged}}
 
{{PacketList|0x59|Set Title Text|rel=added}}
 
{{PacketList|0x5A|Set Title Time|rel=added}}
 
{{PacketList|{{change|0x50|0x5B}}|Entity Sound Effect|pre=unchanged}}
 
{{PacketList|{{change|0x51|0x5C}}|Sound Effect|pre=unchanged}}
 
{{PacketList|{{change|0x52|0x5D}}|Stop Sound|pre=unchanged}}
 
{{PacketList|{{change|0x53|0x5E}}|Player List Header And Footer|pre=unchanged}}
 
{{PacketList|{{change|0x54|0x5F}}|NBT Query Response|pre=unchanged}}
 
{{PacketList|{{change|0x55|0x60}}|Collect Item|pre=unchanged}}
 
{{PacketList|{{change|0x56|0x61}}|Entity Teleport|pre=unchanged}}
 
{{PacketList|{{change|0x57|0x62}}|Advancements|pre=unchanged}}
 
{{PacketList|{{change|0x58|0x63}}|Entity Properties}}
 
{{PacketList|{{change|0x59|0x64}}|Entity Effect|pre=unchanged}}
 
{{PacketList|{{change|0x5A|0x65}}|Declare Recipes|pre=unchanged}}
 
{{PacketList|{{change|0x5B|0x66}}|Tags}}
 
 
  |-
 
  |-
!colspan="4"| Play serverbound
+
!colspan="4"| Login clientbound
{{PacketList|0x05|Client Settings}}
+
{{PacketList|0x05|Cookie Request (login)|rel=added}}
{{PacketList|0x07|Window Confirmation (serverbound)|pre=removed}}
 
{{PacketList|{{change|0x08|0x07}}|Click Window Button|pre=unchanged}}
 
{{PacketList|{{change|0x09|0x08}}|Click Window}}
 
{{PacketList|{{change|0x0A|0x09}}|Close Window (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x0B|0x0A}}|Plugin Message (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x0C|0x0B}}|Edit Book|pre=unchanged}}
 
{{PacketList|{{change|0x0D|0x0C}}|Query Entity NBT|pre=unchanged}}
 
{{PacketList|{{change|0x0E|0x0D}}|Interact Entity|pre=unchanged}}
 
{{PacketList|{{change|0x0F|0x0E}}|Generate Structure|pre=unchanged}}
 
{{PacketList|{{change|0x10|0x0F}}|Keep Alive (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x11|0x10}}|Lock Difficulty|pre=unchanged}}
 
{{PacketList|{{change|0x12|0x11}}|Player Position|pre=unchanged}}
 
{{PacketList|{{change|0x13|0x12}}|Player Position And Rotation (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x14|0x13}}|Player Rotation|pre=unchanged}}
 
{{PacketList|{{change|0x15|0x14}}|Player Movement|pre=unchanged}}
 
{{PacketList|{{change|0x16|0x15}}|Vehicle Move (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x17|0x16}}|Steer Boat|pre=unchanged}}
 
{{PacketList|{{change|0x18|0x17}}|Pick Item|pre=unchanged}}
 
{{PacketList|{{change|0x19|0x18}}|Craft Recipe Request|pre=unchanged}}
 
{{PacketList|{{change|0x1A|0x19}}|Player Abilities (serverbound)|pre=unchanged}}
 
{{PacketList|{{change|0x1B|0x1A}}|Player Digging|pre=unchanged}}
 
{{PacketList|{{change|0x1C|0x1B}}|Entity Action|pre=unchanged}}
 
{{PacketList|{{change|0x1D|0x1C}}|Steer Vehicle|pre=unchanged}}
 
{{PacketList|0x1D|Pong|rel=added}}
 
 
  |-
 
  |-
!colspan="4"| Handshaking serverbound
+
!colspan="4"| Login serverbound
{{PacketList|0x00|Handshake}}
+
{{PacketList|0x04|Cookie Response (login)|rel=added}}
 +
|-
 +
!colspan="4"| Configuration clientbound
 +
{{PacketList|0x00|Cookie Request (configuration)|rel=added}}
 +
{{PacketList|{{change|0x00|0x01}}|Clientbound Plugin Message (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x01|0x02}}|Disconnect (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x03|0x04}}|Clientbound Keep Alive (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x04|0x05}}|Ping (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x05|0x06}}|Registry Data|pre=unchanged}}
 +
{{PacketList|{{change|0x06|0x07}}|Remove Resource Pack (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x07|0x08}}|Add Resource Pack (configuration)|pre=unchanged}}
 +
{{PacketList|0x09|Store Cookie (configuration)|rel=added}}
 +
{{PacketList|0x0A|Transfer (configuration)|rel=added}}
 +
{{PacketList|{{change|0x08|0x0B}}|Feature Flags|pre=unchanged}}
 +
{{PacketList|{{change|0x09|0x0C}}|Update Tags (configuration)|pre=unchanged}}
 +
 
 +
|-
 +
!colspan="4"| Configuration serverbound
 +
{{PacketList|0x01|Cookie Response (configuration)|rel=added}}
 +
{{PacketList|{{change|0x01|0x02}}|Serverbound Plugin Message (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x03|0x04}}|Serverbound Keep Alive (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x04|0x05}}|Pong (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x05|0x06}}|Resource Pack Response (configuration)|pre=unchanged}}
 +
|-
 +
!colspan="4"| Play clientbound
 +
{{PacketList|0x16|Cookie Request (Play)|rel=added}}
 +
{{PacketList|{{change|0x16|0x17}}|Set Cooldown|pre=unchanged}}
 +
{{PacketList|{{change|0x17|0x18}}|Chat Suggestions|pre=unchanged}}
 +
{{PacketList|{{change|0x18|0x19}}|Clientbound Plugin Message (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x19|0x1A}}|Damage Event|pre=unchanged}}
 +
{{PacketList|{{change|0x1A|0x1B}}|Delete Message|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x1C}}|Disconnect (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1D}}|Disguised Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x1D|0x1E}}|Entity Event|pre=unchanged}}
 +
{{PacketList|{{change|0x1E|0x1F}}|Explosion|pre=unchanged}}
 +
{{PacketList|{{change|0x1F|0x20}}|Unload Chunk|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x21}}|Game Event|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x22}}|Open Horse Screen|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x23}}|Hurt Animation|pre=unchanged}}
 +
{{PacketList|{{change|0x23|0x24}}|Initialize World Border|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x25}}|Clientbound Keep Alive (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x26}}|Chunk Data and Update Light|pre=unchanged}}
 +
{{PacketList|{{change|0x26|0x27}}|World Event|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x28}}|Particle|pre=unchanged}}
 +
{{PacketList|{{change|0x28|0x29}}|Update Light|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2A}}|Login (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x2A|0x2B}}|Map Data|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2C}}|Merchant Offers|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2D}}|Update Entity Position|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x2E}}|Update Entity Position and Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2E|0x2F}}|Update Entity Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2F|0x30}}|Move Vehicle|pre=unchanged}}
 +
{{PacketList|{{change|0x30|0x31}}|Open Book|pre=unchanged}}
 +
{{PacketList|{{change|0x31|0x32}}|Open Screen|pre=unchanged}}
 +
{{PacketList|{{change|0x32|0x33}}|Open Sign Editor|pre=unchanged}}
 +
{{PacketList|{{change|0x33|0x34}}|Ping (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x34|0x35}}|Ping Response (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x35|0x36}}|Place Ghost Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x36|0x37}}|Player Abilities|pre=unchanged}}
 +
{{PacketList|{{change|0x37|0x38}}|Player Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x38|0x39}}|End Combat|pre=unchanged}}
 +
{{PacketList|{{change|0x39|0x3A}}|Enter Combat|pre=unchanged}}
 +
{{PacketList|{{change|0x3A|0x3B}}|Combat Death|pre=unchanged}}
 +
{{PacketList|{{change|0x3B|0x3C}}|Player Info Remove|pre=unchanged}}
 +
{{PacketList|{{change|0x3C|0x3D}}|Player Info Update|pre=unchanged}}
 +
{{PacketList|{{change|0x3D|0x3E}}|Look At|pre=unchanged}}
 +
{{PacketList|{{change|0x3E|0x3F}}|Synchronize Player Position|pre=unchanged}}
 +
{{PacketList|{{change|0x3F|0x40}}|Update Recipe Book|pre=unchanged}}
 +
{{PacketList|{{change|0x40|0x41}}|Remove Entities|pre=unchanged}}
 +
{{PacketList|{{change|0x41|0x42}}|Remove Entity Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x42|0x43}}|Reset Score|pre=unchanged}}
 +
{{PacketList|{{change|0x43|0x44}}|Remove Resource Pack (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x44|0x45}}|Add Resource Pack (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x45|0x46}}|Respawn|pre=unchanged}}
 +
{{PacketList|{{change|0x46|0x47}}|Set Head Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x47|0x48}}|Update Section Blocks|pre=unchanged}}
 +
{{PacketList|{{change|0x48|0x49}}|Select Advancements Tab|pre=unchanged}}
 +
{{PacketList|{{change|0x49|0x4A}}|Server Data|pre=unchanged}}
 +
{{PacketList|{{change|0x4A|0x4B}}|Set Action Bar Text|pre=unchanged}}
 +
{{PacketList|{{change|0x4B|0x4C}}|Set Border Center|pre=unchanged}}
 +
{{PacketList|{{change|0x4C|0x4D}}|Set Border Lerp Size|pre=unchanged}}
 +
{{PacketList|{{change|0x4D|0x4E}}|Set Border Size|pre=unchanged}}
 +
{{PacketList|{{change|0x4E|0x4F}}|Set Border Warning Delay|pre=unchanged}}
 +
{{PacketList|{{change|0x4F|0x50}}|Set Border Warning Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x50|0x51}}|Set Camera|pre=unchanged}}
 +
{{PacketList|{{change|0x51|0x52}}|Set Held Item|pre=unchanged}}
 +
{{PacketList|{{change|0x52|0x53}}|Set Center Chunk|pre=unchanged}}
 +
{{PacketList|{{change|0x53|0x54}}|Set Render Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x54|0x55}}|Set Default Spawn Position|pre=unchanged}}
 +
{{PacketList|{{change|0x55|0x56}}|Display Objective|pre=unchanged}}
 +
{{PacketList|{{change|0x56|0x57}}|Set Entity Metadata|pre=unchanged}}
 +
{{PacketList|{{change|0x57|0x58}}|Link Entities|pre=unchanged}}
 +
{{PacketList|{{change|0x58|0x59}}|Set Entity Velocity|pre=unchanged}}
 +
{{PacketList|{{change|0x59|0x5A}}|Set Equipment|pre=unchanged}}
 +
{{PacketList|{{change|0x5A|0x5B}}|Set Experience|pre=unchanged}}
 +
{{PacketList|{{change|0x5B|0x5C}}|Set Health|pre=unchanged}}
 +
{{PacketList|{{change|0x5C|0x5D}}|Update Objectives|pre=unchanged}}
 +
{{PacketList|{{change|0x5D|0x5E}}|Set Passengers|pre=unchanged}}
 +
{{PacketList|{{change|0x5E|0x5F}}|Update Teams|pre=unchanged}}
 +
{{PacketList|{{change|0x5F|0x60}}|Update Score|pre=unchanged}}
 +
{{PacketList|{{change|0x60|0x61}}|Set Simulation Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x61|0x62}}|Set Subtitle Text|pre=unchanged}}
 +
{{PacketList|{{change|0x62|0x63}}|Update Time|pre=unchanged}}
 +
{{PacketList|{{change|0x63|0x64}}|Set Title Text|pre=unchanged}}
 +
{{PacketList|{{change|0x64|0x65}}|Set Title Animation Times|pre=unchanged}}
 +
{{PacketList|{{change|0x65|0x66}}|Entity Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x66|0x67}}|Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x67|0x68}}|Start Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x68|0x69}}|Stop Sound|pre=unchanged}}
 +
{{PacketList|0x6A|Store Cookie (Play)|rel=added}}
 +
{{PacketList|{{change|0x69|0x6B}}|System Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x6A|0x6C}}|Set Tab List Header And Footer|pre=unchanged}}
 +
{{PacketList|{{change|0x6B|0x6D}}|Tag Query Response|pre=unchanged}}
 +
{{PacketList|{{change|0x6C|0x6E}}|Pickup Item|pre=unchanged}}
 +
{{PacketList|{{change|0x6D|0x6F}}|Teleport Entity|pre=unchanged}}
 +
{{PacketList|{{change|0x6E|0x70}}|Set Ticking State|pre=unchanged}}
 +
{{PacketList|{{change|0x6F|0x71}}|Step Tick|pre=unchanged}}
 +
{{PacketList|0x72|Transfer (Play)|rel=added}}
 +
{{PacketList|{{change|0x70|0x73}}|Update Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x71|0x74}}|Update Attributes}}
 +
{{PacketList|{{change|0x72|0x75}}|Entity Effect}}
 +
{{PacketList|{{change|0x73|0x76}}|Update Recipes|pre=unchanged}}
 +
{{PacketList|{{change|0x74|0x77}}|Update Tags (play)|pre=unchanged}}
 +
|-
 +
!colspan="4"| Play serverbound
 +
{{PacketList|0x10|Cookie Response (play)|rel=added}}
 +
{{PacketList|{{change|0x10|0x11}}|Serverbound Plugin Message (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x11|0x12}}|Edit Book|pre=unchanged}}
 +
{{PacketList|{{change|0x12|0x13}}|Query Entity Tag|pre=unchanged}}
 +
{{PacketList|{{change|0x13|0x14}}|Interact|pre=unchanged}}
 +
{{PacketList|{{change|0x14|0x15}}|Jigsaw Generate|pre=unchanged}}
 +
{{PacketList|{{change|0x15|0x16}}|Serverbound Keep Alive (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x16|0x17}}|Lock Difficulty|pre=unchanged}}
 +
{{PacketList|{{change|0x17|0x18}}|Set Player Position|pre=unchanged}}
 +
{{PacketList|{{change|0x18|0x19}}|Set Player Position and Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x19|0x1A}}|Set Player Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x1A|0x1B}}|Set Player On Ground|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x1C}}|Move Vehicle|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1D}}|Paddle Boat|pre=unchanged}}
 +
{{PacketList|{{change|0x1D|0x1E}}|Pick Item|pre=unchanged}}
 +
{{PacketList|{{change|0x1E|0x1F}}|Ping Request (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x1F|0x20}}|Place Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x21}}|Player Abilities|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x22}}|Player Action|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x23}}|Player Command|pre=unchanged}}
 +
{{PacketList|{{change|0x23|0x24}}|Player Input|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x25}}|Pong (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x26}}|Change Recipe Book Settings|pre=unchanged}}
 +
{{PacketList|{{change|0x26|0x27}}|Set Seen Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x28}}|Rename Item|pre=unchanged}}
 +
{{PacketList|{{change|0x28|0x29}}|Resource Pack Response (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2A}}|Seen Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x2A|0x2B}}|Select Trade|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2C}}|Set Beacon Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2D}}|Set Held Item|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x2E}}|Program Command Block|pre=unchanged}}
 +
{{PacketList|{{change|0x2E|0x2F}}|Program Command Block Minecart|pre=unchanged}}
 +
{{PacketList|{{change|0x2F|0x30}}|Set Creative Mode Slot|pre=unchanged}}
 +
{{PacketList|{{change|0x30|0x31}}|Program Jigsaw Block|pre=unchanged}}
 +
{{PacketList|{{change|0x31|0x32}}|Program Structure Block|pre=unchanged}}
 +
{{PacketList|{{change|0x32|0x33}}|Update Sign|pre=unchanged}}
 +
{{PacketList|{{change|0x33|0x34}}|Swing Arm|pre=unchanged}}
 +
{{PacketList|{{change|0x34|0x35}}|Teleport To Entity|pre=unchanged}}
 +
{{PacketList|{{change|0x35|0x36}}|Use Item On|pre=unchanged}}
 +
{{PacketList|{{change|0x36|0x37}}|Use Item|pre=unchanged}}
 
  |}
 
  |}
  
Line 160: Line 200:
 
== Entity Metadata ==
 
== Entity Metadata ==
  
{{#vardefine:meta_prerelease|1}}
+
{{#vardefine: meta_prerelease | 1}}
  
{{Warning2|Note that other entities have had metadata shifts due to these changes, not shown here.}}
+
{{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|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|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
 +
|}
  
=== Entity ===
+
=== Armadillo ===
  
{{metadata inherit|Entity}}
+
{{Metadata inherit|Armadillo|inherits=Animal|start_at=17}}
 
+
{| class="wikitable" {{added}}
{| class="wikitable"
 
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
Line 174: Line 303:
 
  ! Default
 
  ! Default
 
  |-
 
  |-
|rowspan="9"| {{Metadata id|}}
 
|rowspan="9"| Byte
 
! Bit mask
 
! Meaning
 
|rowspan="9"| 0
 
|-
 
| 0x01
 
| Is on fire
 
|-
 
| 0x02
 
| Is crouching
 
|-
 
| 0x04
 
| Unused (previously riding)
 
|-
 
| 0x08
 
| Is sprinting
 
|-
 
| 0x10
 
| Is swimming
 
|-
 
| 0x20
 
| Is invisible
 
|-
 
| 0x40
 
| has glowing effect
 
|-
 
| 0x80
 
| Is flying with an {{Minecraft Wiki|elytra}}
 
|-
 
| {{Metadata id|}}
 
| VarInt
 
|colspan="2"| Air ticks
 
| 300
 
|-
 
| {{Metadata id|}}
 
| OptChat
 
|colspan="2"| Custom name
 
| empty
 
|-
 
| {{Metadata id|}}
 
| Boolean
 
|colspan="2"| Is custom name visible
 
| false
 
|-
 
| {{Metadata id|}}
 
| Boolean
 
|colspan="2"| Is silent
 
| false
 
|-
 
| {{Metadata id|}}
 
| Boolean
 
|colspan="2"| Has no gravity
 
| false
 
|-
 
| {{Metadata id|}}
 
| Pose
 
|colspan="2"| Pose
 
| STANDING
 
|- {{added}}
 
 
  | {{Metadata id|added}}
 
  | {{Metadata id|added}}
  | VarInt
+
  | {{Metadata type|Armadillo State}}
  |colspan="2"| Ticks frozen in powdered snow
+
  |colspan="2"| Armadillo State
  | 0
+
  | IDLE
 
  |}
 
  |}
  
Line 252: Line 321:
 
No changes so far.
 
No changes so far.
  
== Play ==
+
== Handshake ==
  
=== Clientbound ===
+
=== Serverbound ===
  
==== Sculk Vibration Signal ====
+
==== Handshake ====
  
{| class="wikitable" {{Added}}
+
This causes the server to switch into the target state.
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="4"| 0x05
 
|rowspan="4"| Play
 
|rowspan="4"| Client
 
| Source Position
 
| Position
 
| Source position for the vibration.
 
|-
 
| Destination Identifier
 
| Identifier
 
| Identifier of the destination codec type.
 
|-
 
| Destination
 
| Varies
 
| Vanilla default destinations are a block position encoded as a [https://wiki.vg/Protocol#Data_types Position] for "block" or an entity id encoded as a VarInt for "entity".
 
|-
 
| Arrival Ticks
 
| VarInt
 
| Ticks for the signal to arrive at the destination.
 
|}
 
This packet shows a permanent particle.
 
 
 
==== Clear Titles====
 
 
 
{| class="wikitable" {{Added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|- {{ Added }}
 
|rowspan="4"| 0x10
 
|rowspan="4"| Play
 
|rowspan="4"| Client
 
|- {{ Added }}
 
| Reset
 
| Boolean
 
|
 
|-
 
|}
 
 
 
==== Explosion ====
 
 
 
Sent when an explosion occurs (creepers, TNT, and ghast fireballs).
 
 
 
Each block in Records is set to air. Coordinates for each axis in record is int(X) + record.x
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 321: Line 337:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="9"| {{change|0x1B|0x1C}}
+
  | rowspan="4"| 0x00
  |rowspan="9"| Play
+
  | rowspan="4"| Handshaking
  |rowspan="9"| Client
+
  | rowspan="4"| Server
  | X
+
  | Protocol Version
  | Float
+
  | [[#Definitions:varint|VarInt]]
  |  
+
  | See [[protocol version numbers]] (currently 765 in Minecraft 1.20.4).
 
  |-
 
  |-
  | Y
+
  | Server Address
  | Float
+
  | [[#Definitions:string|String]] (255)
  |  
+
  | Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect. The Notchian server does not use this information. Note that SRV records are a simple redirect, e.g. if _minecraft._tcp.example.com points to mc.example.org, users connecting to example.com will provide example.org as server address in addition to connecting to it.
 
  |-
 
  |-
  | Z
+
  | Server Port
  | Float
+
  | [[#Definitions:unsigned-short|Unsigned Short]]
  |  
+
  | Default is 25565. The Notchian server does not use this information.
 
  |-
 
  |-
  | Strength
+
  | Next State
  | Float
+
  | [[#Definitions:varint|VarInt]] [[#Definitions:enum|Enum]]
| A strength greater than or equal to 2.0 spawns a <code>minecraft:explosion_emitter</code> particle, while a lesser strength spawns a <code>minecraft:explosion</code> particle.
+
  | 1 for [[#Status|Status]], 2 for [[#Login|Login]]{{change||, 3 for [[#Login|Transfer]]}}.
  |-
 
| Record Count
 
| {{change|Int|VarInt}}
 
| Number of elements in the following array.
 
|-
 
| Records
 
| Array of (Byte, Byte, Byte)
 
| Each record is 3 signed bytes long; the 3 bytes are the XYZ (respectively) signed offsets of affected blocks.
 
|-
 
| Player Motion X
 
| Float
 
| X velocity of the player being pushed by the explosion.
 
|-
 
| Player Motion Y
 
| Float
 
| Y velocity of the player being pushed by the explosion.
 
|-
 
| Player Motion Z
 
| Float
 
| Z velocity of the player being pushed by the explosion.
 
 
  |}
 
  |}
  
==== Initialize World Border ====  
+
== Status ==
  
{| class="wikitable"
+
=== Clientbound ===
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|- {{ Added }}
 
|rowspan="8"| 0x20
 
|rowspan="8"| Play
 
|rowspan="8"| Client
 
| X
 
| Double
 
|
 
|- {{ Added }}
 
| Z
 
| Double
 
|
 
|- {{ Added }}
 
| Old Diameter
 
| Double
 
| Current length of a single side of the world border, in meters.
 
|- {{ Added }}
 
| New Diameter
 
| Double
 
| Target length of a single side of the world border, in meters.
 
|- {{ Added }}
 
| Speed
 
| VarLong
 
| Number of real-time ''milli''seconds until New Diameter is reached. It appears that Notchian server does not sync world border speed to game ticks, so it gets out of sync with server lag. If the world border is not moving, this is set to 0.
 
|- {{ Added }}
 
| Portal Teleport Boundary
 
| VarInt
 
| Resulting coordinates from a portal teleport are limited to ±value. Usually 29999984.
 
|- {{ Added }}
 
| Warning Blocks
 
| VarInt
 
| In meters.
 
|- {{ Added }}
 
| Warning Time
 
| VarInt
 
| In seconds as set by <code>/worldborder warning time</code>.
 
|- {{ Added }}
 
|}
 
  
The Notchian client determines how solid to display the warning by comparing to whichever is higher, the warning distance or whichever is lower, the distance from the current diameter to the target diameter or the place the border will be after warningTime seconds. In pseudocode:
+
No changes so far.
  
<syntaxhighlight lang="java">
+
=== Serverbound ===
distance = max(min(resizeSpeed * 1000 * warningTime, abs(targetDiameter - currentDiameter)), warningDistance);
 
if (playerDistance < distance) {
 
    warning = 1.0 - playerDistance / distance;
 
} else {
 
    warning = 0.0;
 
}
 
</syntaxhighlight>
 
  
==== Chunk Data ====
+
No changes so far.
{{Main|Chunk Format}}
 
{{See also|#Unload Chunk}}
 
  
{{Need Info|How do biomes work now?  The biome change happened at the same time as the seed change, but it's not clear how/if biomes could be computed given that it's not the actual seed...  ([https://www.reddit.com/r/Mojira/comments/e5at6i/a_discussion_for_the_changes_to_how_biomes_are/ /r/mojira discussion] which notes that it seems to be some kind of interpolation, and 3D biomes are only used in the nether)}}
+
== Login ==
  
The server only sends skylight information for chunk pillars in the {{Minecraft Wiki|Overworld}}, it's up to the client to know in which dimension the player is currently located. You can also infer this information from the primary bitmask and the amount of uncompressed bytes sent.  This packet also sends all block entities in the chunk (though sending them is not required; it is still legal to send them with [[#Update Block Entity|Update Block Entity]] later).
+
=== Clientbound ===
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="13"| {{change|0x20|0x22}}
 
|rowspan="13"| Play
 
|rowspan="13"| Client
 
| Chunk X
 
| Int
 
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
|-
 
| Chunk Z
 
| Int
 
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
|- {{removed}}
 
| Full chunk
 
| Boolean
 
| See [[Chunk Format#Full chunk|Chunk Format]]
 
|- {{removed}}
 
| Primary Bit Mask
 
| VarInt
 
| Bitmask with bits set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from y=0 to y=15).
 
|- {{added}}
 
| Bit Mask Length
 
| VarInt
 
| Length of the following array
 
|- {{added}}
 
| Primary Bit Mask
 
| Array of Long
 
| BitSet with bits (world height in blocks / 16) set to 1 for every 16×16×16 chunk section whose data is included in Data. The least significant bit represents the chunk section at the bottom of the chunk column (from the lowest y to 15 blocks above).
 
|-
 
| Heightmaps
 
| [[NBT]]
 
| Compound containing one long array named <code>MOTION_BLOCKING</code>, which is a heightmap for the highest solid block at each position in the chunk (as a compacted long array with 256 entries at 9 bits per entry totaling 36 longs). The Notchian server also adds a <code>WORLD_SURFACE</code> long array, the purpose of which is unknown, but it's not required for the chunk to be accepted.
 
|-
 
| Biomes length
 
| {{change|Optional|}} VarInt
 
| Size of the following array; should always be 1024.  {{change|Not present if full chunk is false.|}}
 
|-
 
| Biomes
 
| {{change|Optional|}} Array of VarInt
 
| 1024 biome IDs, ordered by x then z then y, in 4&times;4&times;4 blocks.  {{change|Not present if full chunk is false.|}}  See [[Chunk Format#Biomes|Chunk Format § Biomes]].
 
|-
 
| Size
 
| VarInt
 
| Size of Data in bytes
 
|-
 
| Data
 
| Byte array
 
| See [[Chunk Format#Data structure|data structure]] in Chunk Format
 
|-
 
| Number of block entities
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Block entities
 
| Array of [[NBT|NBT Tag]]
 
| All block entities in the chunk.  Use the x, y, and z tags in the NBT to determine their positions.
 
|}
 
 
 
Note that the Notchian client requires an [[#Update View Position|Update View Position]] packet when it crosses a chunk border, otherwise it'll only display render distance + 2 chunks around the chunk it spawned in.
 
 
 
The compacted array format has been adjusted so that individual entries no longer span across multiple longs, affecting the main data array and heightmaps.
 
 
 
New format, 5 bits per block, containing the following references to blocks in a palette (not shown): <span style="border: solid 2px hsl(0, 90%, 60%)">1</span><span style="border: solid 2px hsl(30, 90%, 60%)">2</span><span style="border: solid 2px hsl(60, 90%, 60%)">2</span><span style="border: solid 2px hsl(90, 90%, 60%)">3</span><span style="border: solid 2px hsl(120, 90%, 60%)">4</span><span style="border: solid 2px hsl(150, 90%, 60%)">4</span><span style="border: solid 2px hsl(180, 90%, 60%)">5</span><span style="border: solid 2px hsl(210, 90%, 60%)">6</span><span style="border: solid 2px hsl(240, 90%, 60%)">6</span><span style="border: solid 2px hsl(270, 90%, 60%)">4</span><span style="border: solid 2px hsl(300, 90%, 60%)">8</span><span style="border: solid 2px hsl(330, 90%, 60%)">0</span><span style="border: solid 2px hsl(0, 90%, 30%)">7</span><span style="border: solid 2px hsl(30, 90%, 30%)">4</span><span style="border: solid 2px hsl(60, 90%, 30%)">3</span><span style="border: solid 2px hsl(90, 90%, 30%)">13</span><span style="border: solid 2px hsl(120, 90%, 30%)">15</span><span style="border: solid 2px hsl(150, 90%, 30%)">16</span><span style="border: solid 2px hsl(180, 90%, 30%)">9</span><span style="border: solid 2px hsl(210, 90%, 30%)">14</span><span style="border: solid 2px hsl(240, 90%, 30%)">10</span><span style="border: solid 2px hsl(270, 90%, 30%)">12</span><span style="border: solid 2px hsl(300, 90%, 30%)">0</span><span style="border: solid 2px hsl(330, 90%, 30%)">2</span>
 
  
<code>0020863148418841</code> <code><span style="outline: dashed 2px black">0000</span><span style="outline: solid 2px hsl(330, 90%, 60%)">00000</span><span style="outline: solid 2px hsl(300, 90%, 60%)">01000</span><span style="outline: solid 2px hsl(270, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(240, 90%, 60%)">00110</span><span style="outline: solid 2px hsl(210, 90%, 60%)">00110</span><span style="outline: solid 2px hsl(180, 90%, 60%)">00101</span><span style="outline: solid 2px hsl(150, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(120, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(90, 90%, 60%)">00011</span><span style="outline: solid 2px hsl(60, 90%, 60%)">00010</span><span style="outline: solid 2px hsl(30, 90%, 60%)">00010</span><span style="outline: solid 2px hsl(0, 90%, 60%)">00001</span></code><br>
+
==== Cookie Request (login) ====
<code>01018A7260F68C87</code> <code><span style="outline: dashed 2px black">0000</span><span style="outline: solid 2px hsl(330, 90%, 30%)">00010</span><span style="outline: solid 2px hsl(300, 90%, 30%)">00000</span><span style="outline: solid 2px hsl(270, 90%, 30%)">01100</span><span style="outline: solid 2px hsl(240, 90%, 30%)">01010</span><span style="outline: solid 2px hsl(210, 90%, 30%)">01110</span><span style="outline: solid 2px hsl(180, 90%, 30%)">01001</span><span style="outline: solid 2px hsl(150, 90%, 30%)">10000</span><span style="outline: solid 2px hsl(120, 90%, 30%)">01111</span><span style="outline: solid 2px hsl(90, 90%, 30%)">01101</span><span style="outline: solid 2px hsl(60, 90%, 30%)">00011</span><span style="outline: solid 2px hsl(30, 90%, 30%)">00100</span><span style="outline: solid 2px hsl(0, 90%, 30%)">00111</span></code>
 
  
==== Entity Movement ====
+
Requests a cookie that was previously stored.
  
This packet may be used to initialize an entity.
+
{| class="wikitable" {{added}}
 
 
For player entities, either this packet or any move/look packet is sent every game tick. So the meaning of this packet is basically that the entity did not move/look since the last such packet.
 
 
 
{| 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
  |- {{removed}}
+
  |-
  | 0x2A
+
  | rowspan="1"| 0x05
  | Play
+
  | rowspan="1"| Login
  | Client
+
  | rowspan="1"| Client
  | Entity ID
+
  | colspan="2"| Key
  | VarInt
+
  | colspan="2"| Identifier
  |  
+
  | The identifier of the cookie.
 
  |}
 
  |}
  
==== Ping ====
+
=== Serverbound ===
 
 
Unknown what this packet does just yet, not used by the Notchian server or client.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|- {{added}}
 
| 0x30
 
| Play
 
| Client
 
| ID
 
| Int
 
|
 
|}
 
  
==== Update Light ====
+
==== Cookie Response (login) ====
  
Updates light levels for a chunk.
+
Response to a [[#Cookie_Request_(login)|Cookie Request (login)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! 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="21"| {{change|0x23|0x25}}
+
  | rowspan="3"| 0x04
  |rowspan="21"| Play
+
  | rowspan="3"| Login
  |rowspan="21"| Client
+
  | rowspan="3"| Server
|colspan="2"| Chunk X
+
  | colspan="2"| Key
|colspan="2"| VarInt
+
  | colspan="2"| Identifier
| Chunk coordinate (block coordinate divided by 16, rounded down)
+
  | The identifier of the cookie.
|-
 
|colspan="2"| Chunk Z
 
|colspan="2"| VarInt
 
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
|-
 
|colspan="2"| Trust Edges
 
|colspan="2"| Boolean
 
| If edges should be trusted for light updates.
 
|- {{removed}}
 
|colspan="2"| Sky Light Mask
 
|colspan="2"| VarInt
 
| Mask containing 18 bits, with the lowest bit corresponding to chunk section -1 (in the void, y=-16 to y=-1) and the highest bit for chunk section 16 (above the world, y=256 to y=271)
 
|- {{removed}}
 
|colspan="2"| Block Light Mask
 
|colspan="2"| VarInt
 
| Mask containing 18 bits, with the same order as sky light
 
|- {{removed}}
 
|colspan="2"| Empty Sky Light Mask
 
|colspan="2"| VarInt
 
| Mask containing 18 bits, which indicates sections that have 0 for all their sky light values.  If a section is set in both this mask and the main sky light mask, it is ignored for this mask and it is included in the sky light arrays (the notchian server does not create such masks).  If it is only set in this mask, it is not included in the sky light arrays.
 
|- {{removed}}
 
|colspan="2"| Empty Block Light Mask
 
|colspan="2"| VarInt
 
| Mask containing 18 bits, which indicates sections that have 0 for all their block light values.  If a section is set in both this mask and the main block light mask, it is ignored for this mask and it is included in the block light arrays (the notchian server does not create such masks).  If it is only set in this mask, it is not included in the block light arrays.
 
|- {{Added}}
 
|colspan="2"| Length 1
 
|colspan="2"| VarInt
 
| Length of the following array
 
|- {{Added}}
 
|colspan="2"| Sky Light Mask
 
|colspan="2"| Array of Long
 
| BitSet containing bits for each sections in the world + 2 (lowest bit 16-1 blocks below min world height, highest 1-16 above max world height)
 
|- {{Added}}
 
|colspan="2"| Length 2
 
|colspan="2"| VarInt
 
| Length of the following array
 
|- {{Added}}
 
|colspan="2"| Block Light Mask
 
|colspan="2"| Array of Long
 
| BitSet containing bits for each sections in the world + 2, same order as sky light
 
|- {{Added}}
 
|colspan="2"| Length 3
 
|colspan="2"| VarInt
 
| Length of the following array
 
|- {{Added}}
 
|colspan="2"| Empty Sky Light Mask
 
|colspan="2"| Array of Long
 
| BitSet containing a variable amount of bits (see sky/block light) which indicates sections that have 0 for all their sky light values
 
|- {{Added}}
 
  |colspan="2"| Length 4
 
  |colspan="2"| VarInt
 
  | Length of the following array
 
|- {{Added}}
 
|colspan="2"| Empty Block Light Mask
 
|colspan="2"| Array of Long
 
| BitSet containing a variable amount of bits (see sky/block light) which indicates sections that have 0 for all their block light values
 
|- {{added}}
 
|colspan="2"| Sky Light array count
 
|colspan="2"| VarInt
 
| Number of entries in the following array
 
|-
 
|rowspan="2"| Sky Light arrays
 
| Length
 
|rowspan="2"| Array
 
| VarInt
 
| Length of the following array in bytes (always 2048)
 
 
  |-
 
  |-
| Sky Light array
+
  | colspan="2"| Has Payload
| Array of 2048 bytes
+
  | colspan="2"| Boolean
| There is 1 array for each bit set to true in the sky light mask, starting with the lowest value.  Half a byte per light value.
+
  | The payload is only present if the cookie exists on the client.
|- {{added}}
 
  |colspan="2"| Block Light array count
 
  |colspan="2"| VarInt
 
  | Number of entries in the following array
 
 
  |-
 
  |-
  |rowspan="2"| Block Light arrays
+
  | colspan="2"| Payload
  | Length
+
  | colspan="2"| Optional ByteArray(5120)
|rowspan="2"| Array
+
  | The data of the cookie, if any.
| VarInt
 
| Length of the following array in bytes (always 2048)
 
  |-
 
| Block Light array
 
| Array of 2048 bytes
 
| There is 1 array for each bit set to true in the block light mask, starting with the lowest value.  Half a byte per light value.
 
 
  |}
 
  |}
  
==== Join Game ====
+
== Configuration ==
 +
 
 +
=== Clientbound ===
 +
 
 +
==== Cookie Request (configuration) ====
  
See [[Protocol Encryption]] for information on logging in.
+
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="16"| {{change|0x24|0x26}}
+
  | rowspan="1"| 0x00
  |rowspan="16"| Play
+
  | rowspan="1"| Configuration
  |rowspan="16"| Client
+
  | rowspan="1"| Client
  | Entity ID
+
  | colspan="2"| Key
| Int
+
  | colspan="2"| Identifier
| The player's Entity ID (EID).
+
  | The identifier of the cookie.
|-
 
| Is hardcore
 
| Boolean
 
|
 
|-
 
| Gamemode
 
| Unsigned Byte
 
| 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
 
|-
 
| Previous Gamemode
 
| Byte
 
| 0: survival, 1: creative, 2: adventure, 3: spectator. The hardcore flag is not included. The previous gamemode. Defaults to -1 if there is no previous gamemode. (More information needed)
 
|-
 
| World Count
 
| VarInt
 
| Size of the following array.
 
|-
 
| World Names
 
| Array of Identifier
 
| Identifiers for all worlds on the server.
 
|-
 
| Dimension Codec
 
| [[NBT|NBT Tag Compound]]
 
| The full extent of these is still unknown, but the tag represents a dimension and biome registry. See below for the vanilla default.
 
|-
 
| Dimension
 
| [[NBT|NBT Tag Compound]]
 
| Valid dimensions are defined per dimension registry sent before this. The structure of this tag is a dimension type (see below).
 
|-
 
| World Name
 
| Identifier
 
| Name of the world 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
 
|-
 
| 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).
 
|-
 
| Reduced Debug Info
 
| Boolean
 
| If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
 
|-
 
| Enable respawn screen
 
| Boolean
 
| Set to false when the doImmediateRespawn gamerule is true.
 
|-
 
| Is Debug
 
| Boolean
 
| True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
 
|-
 
| Is Flat
 
| 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.
 
|}
 
 
 
 
 
The '''Dimension Codec''' NBT Tag Compound ([https://gist.githubusercontent.com/BomBardyGamer/c075a7a34b51f2df9d5aabdd2a762f4f/raw/c7352784dfadbca00d2282aeca04ed80081bfb09/dimension_codec.snbt Default value in SNBT]) includes two registries: "minecraft:dimension_type" and "minecraft:worldgen/biome".
 
 
 
{| class="wikitable"
 
!Name
 
!Type
 
!style="width: 250px;" colspan="2"| Notes
 
  |-
 
| minecraft:dimension_type
 
| TAG_Compound
 
| The dimension type registry (see below).
 
|-
 
| minecraft:worldgen/biome
 
| TAG_Compound
 
| The biome registry (see below).
 
|}
 
 
 
Dimension type registry:
 
 
 
{| class="wikitable"
 
!Name
 
!Type
 
!style="width: 250px;" colspan="2"| Notes
 
|-
 
| type
 
| TAG_String
 
| The name of the registry. Always "minecraft:dimension_type".
 
|-
 
| value
 
| TAG_List
 
| List of dimension types registry entries (see below).
 
|}
 
 
 
Dimension type registry entry:
 
 
 
{| class="wikitable"
 
!Name
 
!Type
 
!style="width: 250px;" colspan="2"| Notes
 
|-
 
| name
 
| TAG_String
 
| The name of the dimension type (for example, "minecraft:overworld").
 
|-
 
| id
 
| TAG_Int
 
| The protocol ID of the dimension (matches the index of the element in the registry list).
 
|-
 
| element
 
| TAG_Compound
 
| The dimension type (see below).
 
|}
 
 
 
Dimension type:
 
 
 
{| class="wikitable"
 
! Name
 
! Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! Values
 
|-
 
| piglin_safe
 
| TAG_Byte
 
|colspan="2"| Whether piglins shake and transform to zombified piglins.
 
| 1: true, 0: false.
 
|-
 
| natural
 
| TAG_Byte
 
|colspan="2"| When false, compasses spin randomly. When true, nether portals can spawn zombified piglins.
 
| 1: true, 0: false.
 
|-
 
| ambient_light
 
| TAG_Float
 
|colspan="2"| How much light the dimension has.
 
| 0.0 to 1.0.
 
|-
 
| fixed_time
 
| Optional TAG_Long
 
|colspan="2"| If set, the time of the day is the specified value.
 
| If set, 0 to 24000.
 
|-
 
| infiniburn
 
| TAG_String
 
|colspan="2"| A resource location defining what block tag to use for infiniburn.
 
| "" or minecraft resource "minecraft:...".
 
|-
 
| respawn_anchor_works
 
| TAG_Byte
 
|colspan="2"| Whether players can charge and use respawn anchors.
 
| 1: true, 0: false.
 
|-
 
| has_skylight
 
| TAG_Byte
 
|colspan="2"| Whether the dimension has skylight access or not.
 
| 1: true, 0: false.
 
|-
 
| bed_works
 
| TAG_Byte
 
|colspan="2"| Whether players can use a bed to sleep.
 
| 1: true, 0: false.
 
|-
 
| effects
 
| TAG_String
 
|colspan="2"| ?
 
| "minecraft:overworld", "minecraft:the_nether", "minecraft:the_end" or something else.
 
|-
 
| has_raids
 
| TAG_Byte
 
|colspan="2"| Whether players with the Bad Omen effect can cause a raid.
 
| 1: true, 0: false.
 
|- {{added}}
 
| min_y
 
| TAG_Int
 
|colspan="2"| The minimum Y level.
 
|
 
|- {{added}}
 
| height
 
| TAG_Int
 
|colspan="2"| The maximum height.
 
|
 
|-
 
| logical_height
 
  | TAG_Int
 
|colspan="2"| The maximum height to which chorus fruits and nether portals can bring players within this dimension.
 
| 0-256.
 
|-
 
| coordinate_scale
 
| TAG_Float
 
|colspan="2"| The multiplier applied to coordinates when traveling to the dimension.
 
| 1: true, 0: false.
 
|-
 
| ultrawarm
 
| TAG_Byte
 
|colspan="2"| Whether the dimensions behaves like the nether (water evaporates and sponges dry) or not. Also causes lava to spread thinner.
 
| 1: true, 0: false.
 
|-
 
| has_ceiling
 
| TAG_Byte
 
|colspan="2"| Whether the dimension has a bedrock ceiling or not. When true, causes lava to spread faster.
 
| 1: true, 0: false.
 
|}
 
 
 
Biome registry:
 
 
 
{| class="wikitable"
 
!Name
 
!Type
 
!style="width: 250px;" colspan="2"| Notes
 
|-
 
| type
 
| TAG_String
 
| The name of the registry. Always "minecraft:worldgen/biome".
 
|-
 
| value
 
| TAG_List
 
| List of biome registry entries (see below).
 
|}
 
 
 
Biome registry entry:
 
 
 
{| class="wikitable"
 
!Name
 
!Type
 
!style="width: 250px;" colspan="2"| Notes
 
|-
 
| name
 
| TAG_String
 
| The name of the biome (for example, "minecraft:ocean").
 
|-
 
| id
 
| TAG_Int
 
| The protocol ID of the biome (matches the index of the element in the registry list).
 
|-
 
| element
 
| TAG_Compound
 
| The biome properties (see below).
 
 
  |}
 
  |}
  
Biome properties:
+
==== Store Cookie (configuration) ====
  
{| 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.
!colspan="2"|Name
 
!colspan="2"|Type
 
!style="width: 250px;" colspan="2"| Meaning
 
!colspan="2"|Values
 
|-
 
|colspan="2"|precipitation
 
|colspan="2"|TAG_String
 
|colspan="2"| The type of precipitation in the biome.
 
|colspan="2"|"rain", "snow", or "none".
 
|-
 
|colspan="2"| depth
 
|colspan="2"| TAG_Float
 
|colspan="2"| The depth factor of the biome.
 
|colspan="2"| The default values vary between 1.5 and -1.8.
 
|-
 
|colspan="2"| temperature
 
|colspan="2"| TAG_Float
 
|colspan="2"| The temperature factor of the biome.
 
|colspan="2"| The default values vary between 2.0 and -0.5.
 
|-
 
|colspan="2"| scale
 
|colspan="2"| TAG_Float
 
|colspan="2"| ?
 
|colspan="2"| The default values vary between 1.225 and 0.0.
 
|-
 
|colspan="2"| downfall
 
|colspan="2"| TAG_Float
 
|colspan="2"| ?
 
|colspan="2"| The default values vary between 1.0 and 0.0.
 
|-
 
|colspan="2"| category
 
|colspan="2"| TAG_String
 
|colspan="2"| The category of the biome.
 
|colspan="2"| Known values are "ocean", "plains", "desert", "forest", "extreme_hills", "taiga", "swamp", "river", "nether", "the_end", "icy", "mushroom", "beach", "jungle", "mesa", "savanna", and "none".
 
|-
 
|colspan="2"| temperature_modifier
 
|colspan="2"| Optional TAG_String
 
|colspan="2"| ?
 
|colspan="2"| The only known value is "frozen".
 
|-
 
|rowspan="11"| effects
 
| sky_color
 
|rowspan="11"| TAG_Compound
 
| TAG_Int
 
|colspan="2"| The color of the sky.
 
| Example: 8364543, which is #7FA1FF in RGB.
 
|-
 
| water_fog_color
 
| TAG_Int
 
|colspan="2"| Possibly the tint color when swimming.
 
| Example: 8364543, which is #7FA1FF in RGB.
 
|-
 
| fog_color
 
| TAG_Int
 
|colspan="2"| Possibly the color of the fog effect when looking past the view distance.
 
| Example: 8364543, which is #7FA1FF in RGB.
 
|-
 
| water_color
 
| TAG_Int
 
|colspan="2"| The tint color of the water blocks.
 
| Example: 8364543, which is #7FA1FF in RGB.
 
|-
 
| foliage_color
 
| Optional TAG_Int
 
|colspan="2"| The tint color of the grass.
 
| Example: 8364543, which is #7FA1FF in RGB.
 
|-
 
| grass_color
 
| Optional TAG_Int
 
| colspan="2"| ?
 
| Example: 8364543, which is #7FA1FF in RGB.
 
|-
 
| grass_color_modifier
 
| Optional TAG_String
 
|colspan="2"| Unknown, likely affects foliage color.
 
| If set, known values are "swamp" and "dark_forest".
 
|-
 
| music
 
| Optional TAG_Compound
 
|colspan="2"| Music properties for the biome.
 
| If present, contains the fields: replace_current_music (TAG_Byte), sound (TAG_String), max_delay (TAG_Int), min_delay (TAG_Int).
 
|-
 
| ambient_sound
 
| Optional TAG_String
 
|colspan="2"| Ambient soundtrack.
 
| If present, the ID of a soundtrack. Example: "minecraft:ambient.basalt_deltas.loop".
 
|-
 
| additions_sound
 
| Optional TAG_Compound
 
|colspan="2"| Additional ambient sound that plays randomly.
 
| If present, contains the fields: sound (TAG_String), tick_chance (TAG_Double).
 
|-
 
| mood_sound
 
| Optional TAG_Compound
 
|colspan="2"| Additional ambient sound that plays at an interval.
 
| If present, contains the fields: sound (TAG_String), tick_delay (TAG_Int), offset (TAG_Double), block_search_extent (TAG_Int).
 
|-
 
| particle
 
| Optional TAG_Compound
 
|colspan="2"| Particles that appear randomly in the biome.
 
| If present, contains the fields: probability (TAG_Float), options (TAG_Compound). The "options" compound contains the field "type" (TAG_String), which identifies the particle type.
 
|}
 
 
 
==== Map Data ====
 
  
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="18"| {{change|0x25|0x27}}
+
  | rowspan="2"| 0x09
|rowspan="18"| Play
+
  | rowspan="2"| Configuration
  |rowspan="18"| Client
+
  | rowspan="2"| Client
|colspan="2"| Map ID
+
  | colspan="2"| Key
|colspan="2"| VarInt
+
  | colspan="2"| Identifier
| Map ID of the map being modified
+
  | The identifier of the cookie.
|-
 
|colspan="2"| Scale
 
|colspan="2"| Byte
 
| From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
 
|- {{removed}}
 
|colspan="2"| Tracking Position
 
|colspan="2"| Boolean
 
| Specifies whether player and item frame icons are shown
 
|-
 
|colspan="2"| Locked
 
|colspan="2"| Boolean
 
| True if the map has been locked in a cartography table
 
|-
 
|- {{added}}
 
|colspan="2"| Tracking Position
 
|colspan="2"| Boolean
 
| Specifies whether player and item frame icons are shown
 
|-
 
|colspan="2"| Icon Count
 
|colspan="2"| VarInt
 
| Number of elements in the following array. {{change||Only present if "Tracking Position" is true.}}
 
|-
 
  |rowspan="6"| Icon
 
| Type
 
|rowspan="6"| Array
 
| VarInt enum
 
| See below
 
|-
 
| X
 
| Byte
 
| Map coordinates: -128 for furthest left, +127 for furthest right
 
|-
 
| Z
 
| Byte
 
| Map coordinates: -128 for highest, +127 for lowest
 
|-
 
| Direction
 
| Byte
 
| 0-15
 
|-
 
| Has Display Name
 
| Boolean
 
|
 
|-
 
| Display Name
 
| Optional [[Chat]]
 
| Only present if previous Boolean is true
 
|-
 
|colspan="2"| Columns
 
|colspan="2"| Unsigned 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 Unsigned Byte
 
| Only if Columns is more than 0; see {{Minecraft Wiki|Map item format}}
 
|}
 
 
 
For icons, a direction of 0 is a vertical icon and increments by 22.5&deg; (360/16).
 
 
 
Types are based off of rows and columns in <code>map_icons.png</code>:
 
 
 
{| class="wikitable"
 
|-
 
! Icon type
 
! Result
 
|-
 
| 0
 
| White arrow (players)
 
|-
 
| 1
 
| Green arrow (item frames)
 
|-
 
| 2
 
| Red arrow
 
|-
 
| 3
 
| Blue arrow
 
 
  |-
 
  |-
  | 4
+
  | colspan="2"| Payload
| White cross
+
  | colspan="2"| ByteArray(5120)
|-
+
  | The data of the cookie.
| 5
 
| Red pointer
 
|-
 
| 6
 
| White circle (off-map players)
 
|-
 
| 7
 
| Small white circle (far-off-map players)
 
|-
 
| 8
 
| Mansion
 
|-
 
| 9
 
| Temple
 
|-
 
| 10
 
| White Banner
 
|-
 
| 11
 
| Orange Banner
 
|-
 
| 12
 
| Magenta Banner
 
|-
 
| 13
 
| Light Blue Banner
 
|-
 
| 14
 
| Yellow Banner
 
|-
 
| 15
 
| Lime Banner
 
|-
 
| 16
 
| Pink Banner
 
|-
 
| 17
 
| Gray Banner
 
|-
 
| 18
 
| Light Gray Banner
 
|-
 
| 19
 
| Cyan Banner
 
|-
 
| 20
 
| Purple Banner
 
|-
 
| 21
 
| Blue Banner
 
|-
 
| 22
 
| Brown Banner
 
|-
 
| 23
 
| Green Banner
 
|-
 
| 24
 
| Red Banner
 
|-
 
| 25
 
| Black Banner
 
|-
 
| 26
 
| Treasure marker
 
|}
 
 
 
==== Combat Event ====
 
 
 
Originally used for metadata for twitch streaming circa 1.8.  Now only used to display the game over screen (with enter combat and end combat completely ignored by the Notchain client)
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
! Field Type
 
! Notes
 
|- {{Removed}}
 
|rowspan="8"| 0x31
 
|rowspan="8"| Play
 
|rowspan="8"| Client
 
  |colspan="2"| Event
 
| VarInt Enum
 
| Determines the layout of the remaining packet.
 
|- {{Removed}}
 
! Event
 
! Field Name
 
!
 
!
 
|- {{Removed}}
 
| 0: enter combat
 
| ''no fields''
 
| ''no fields''
 
|
 
|- {{Removed}}
 
|rowspan="2"| 1: end combat
 
| Duration
 
| VarInt
 
| Length of the combat in ticks.
 
|- {{Removed}}
 
| Entity ID
 
| Int
 
| ID of the primary opponent of the ended combat, or -1 if there is no obvious primary opponent.
 
|- {{Removed}}
 
|rowspan="3"| 2: entity dead
 
| Player ID
 
| VarInt
 
| Entity ID of the player that died (should match the client's entity ID).
 
|- {{Removed}}
 
| Entity ID
 
| Int
 
  | The killing entity's ID, or -1 if there is no obvious killer.
 
|- {{Removed}}
 
| Message
 
| [[Chat]]
 
| The death message.
 
 
  |}
 
  |}
  
==== End Combat Event ====
+
==== Transfer (configuration) ====
  
Unused by the Notchain client.
+
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
  !colspan="2"| Field Name
+
  ! colspan="2"| Field Name
! Field Type
+
  ! colspan="2"| Field Type
! Notes
 
|- {{Added}}
 
|rowspan="8"| 0x33
 
|rowspan="8"| Play
 
|rowspan="8"| Client
 
| Duration
 
| VarInt
 
| Length of the combat in ticks.
 
|- {{Added}}
 
| Entity ID
 
| Int
 
| ID of the primary opponent of the ended combat, or -1 if there is no obvious primary opponent.
 
|- {{Added}}
 
|}
 
 
 
==== Enter Combat Event ====
 
 
 
Unused by the Notchain client.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
! Field Type
 
! Notes
 
|- {{Added}}
 
|rowspan="8"| 0x34
 
|rowspan="8"| Play
 
|rowspan="8"| Client
 
|}
 
 
 
 
 
==== Death Combat Event ====
 
 
 
Used to send a respawn screen.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
  !colspan="2"| Field Name
 
! Field Type
 
! Notes
 
|- {{Added}}
 
|rowspan="8"| 0x35
 
|rowspan="8"| Play
 
|rowspan="8"| Client
 
| Player ID
 
| VarInt
 
| Entity ID of the player that died (should match the client's entity ID).
 
|- {{Added}}
 
| Entity ID
 
| Int
 
| The killing entity's ID, or -1 if there is no obvious killer.
 
|- {{Added}}
 
| Message
 
| [[Chat]]
 
| The death message.
 
|}
 
 
 
==== Player Position And Look (clientbound) ====
 
 
 
Updates the player's position on the server. This packet will also close the “Downloading Terrain” screen when joining/respawning.
 
 
 
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.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="8"| {{change|0x34|0x38}}
+
  | rowspan="2"| 0x0A
  |rowspan="8"| Play
+
  | rowspan="2"| Configuration
  |rowspan="8"| Client
+
  | rowspan="2"| Client
  | X
+
  | colspan="2"| Host
  | Double
+
  | colspan="2"| String
  | Absolute or relative position, depending on Flags.
+
  | The hostname of IP of the server.
 
  |-
 
  |-
  | Y
+
  | colspan="2"| Port
| Double
+
  | colspan="2"| VarInt
| Absolute or relative position, depending on Flags.
+
  | The port of the server.
|-
 
| Z
 
| Double
 
| Absolute or relative position, depending on Flags.
 
|-
 
| Yaw
 
| Float
 
| Absolute or relative rotation on the X axis, in degrees.
 
|-
 
| Pitch
 
| Float
 
| Absolute or relative rotation on the Y axis, in degrees.
 
  |-
 
| Flags
 
| Byte
 
| Bit field, see below.
 
|-
 
| Teleport ID
 
| VarInt
 
  | Client should confirm this packet with [[#Teleport Confirm|Teleport Confirm]] containing the same Teleport ID.
 
|- {{added}}
 
| Dismount Vehicle
 
| Boolean
 
| True if the player should dismount their vehicle.
 
 
  |}
 
  |}
  
About the Flags field:
+
=== Serverbound ===
  
<Dinnerbone> It's a bitfield, X/Y/Z/Y_ROT/X_ROT. If X is set, the x value is relative and not absolute.
+
==== Cookie Response (configuration) ====
  
{| class="wikitable"
+
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.
|-
 
! Field
 
! Bit
 
|-
 
| X
 
| 0x01
 
|-
 
| Y
 
| 0x02
 
|-
 
| Z
 
| 0x04
 
|-
 
| Y_ROT
 
| 0x08
 
|-
 
| X_ROT
 
| 0x10
 
|}
 
 
 
==== Destroy Entity ====
 
 
 
Sent by the server when {{change|a list of entities|an entity}} is to be destroyed on the client.
 
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| 0x3A
+
  | rowspan="3"| 0x01
  |rowspan="4"| Play
+
  | rowspan="3"| Configuration
  |rowspan="4"| Client
+
  | rowspan="3"| Server
  |- {{removed}}
+
  | colspan="2"| Key
| Count
+
  | colspan="2"| Identifier
  | VarInt
+
  | The identifier of the cookie.
| Number of elements in the following array.
 
|- {{Removed}}
 
| Array of VarInt
 
  | The list of entities of destroy.
 
|- {{Added}}
 
| Entity ID
 
| VarInt
 
|}
 
 
 
==== Resource Pack Send ====
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="4"| {{change|0x38|0x3C}}
+
  | colspan="2"| Has Payload
|rowspan="4"| Play
+
  | colspan="2"| Boolean
  |rowspan="4"| Client
+
  | The payload is only present if the cookie exists on the client.
| URL
 
| String (32767)
 
  | The URL to the resource pack.
 
 
  |-
 
  |-
  | Hash
+
  | colspan="2"| Payload
| String (40)
+
  | colspan="2"| Optional ByteArray(5120)
  | A 40 character hexadecimal and lowercase [[wikipedia:SHA-1|SHA-1]] hash of the resource pack file. (must be lower case in order to work)<br />If it's not a 40 character hexadecimal string, the client will not use it for hash verification and likely waste bandwidth — but it will still treat it as a unique id
+
  | The data of the cookie, if any.
|- {{Added}}
 
| Forced
 
| Boolean
 
  | The notchian client will be forced to use the resource pack from the server. If they decline they will be kicked from the server.
 
|- {{Added}}
 
| Forced Message
 
| [[Chat]]
 
| This is sent with the force resourcepack popup.
 
 
  |}
 
  |}
==== Title ====
 
  
{| class="wikitable"
+
== Play ==
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
! Field Type
 
! Notes
 
|- {{ Removed }}
 
|rowspan="10"| 0x4F
 
|rowspan="10"| Play
 
|rowspan="10"| Client
 
|colspan="2"| Action
 
| VarInt Enum
 
|
 
|- {{ Removed }}
 
! Action
 
! Field Name
 
!
 
!
 
|- {{ Removed }}
 
| 0: set title
 
| Title Text
 
| [[Chat]]
 
|
 
|- {{ Removed }}
 
| 1: set subtitle
 
| Subtitle Text
 
| [[Chat]]
 
|
 
|- {{ Removed }}
 
| 2: set action bar
 
| Action bar text
 
| [[Chat]]
 
| Displays a message above the hotbar (the same as position 2 in [[#Chat Message (clientbound)|Chat Message (clientbound)]].
 
|- {{ Removed }}
 
|rowspan="3"| 3: set times and display
 
| Fade In
 
| Int
 
| Ticks to spend fading in.
 
|- {{ Removed }}
 
| Stay
 
| Int
 
| Ticks to keep the title displayed.
 
|- {{ Removed }}
 
| Fade Out
 
| Int
 
| Ticks to spend out, not when to start fading out.
 
|- {{ Removed }}
 
| 4: hide
 
| ''no fields''
 
| ''no fields''
 
|
 
|- {{ Removed }}
 
| 5: reset
 
| ''no fields''
 
| ''no fields''
 
|
 
|}
 
  
“Hide” makes the title disappear, but if you run times again the same title will appear. “Reset” erases the text.
+
=== Clientbound ===
  
The title is visible on screen for Fade In + Stay + Fade Out ticks.
+
==== Cookie Request (play) ====
  
==== Action Bar ====
+
Requests a cookie that was previously stored.
  
{| class="wikitable" {{Added}}
+
{| 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="1"| 0x41
+
  | rowspan="1"| 0x16
  |rowspan="1"| Play
+
  | rowspan="1"| Play
  |rowspan="1"| Client
+
  | rowspan="1"| Client
  | Action bar text
+
  | colspan="2"| Key
  | [[Chat]]
+
  | colspan="2"| Identifier
  | Displays a message above the hotbar (the same as position 2 in [[#Chat Message (clientbound)|Chat Message (clientbound)]].
+
  | The identifier of the cookie.
 
  |}
 
  |}
==== World Border Center ====
 
  
{| class="wikitable" {{Added}}
+
==== Store Cookie (play) ====
! Packet ID
+
 
! State
+
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.
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="2"| 0x42
 
|rowspan="2"| Play
 
|rowspan="2"| Client
 
| X
 
| Double
 
|
 
|-
 
| Z
 
| Double
 
|
 
|}
 
==== World Border Lerp Size ====  
 
  
{| class="wikitable" {{Added}}
+
{| 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"| 0x43
+
  | rowspan="2"| 0x6A
  |rowspan="3"| Play
+
  | rowspan="2"| Play
  |rowspan="3"| Client
+
  | rowspan="2"| Client
  | Old Diameter
+
  | colspan="2"| Key
  | Double
+
  | colspan="2"| Identifier
  | Current length of a single side of the world border, in meters.
+
  | The identifier of the cookie.
 
  |-
 
  |-
  | New Diameter
+
  | colspan="2"| Payload
| Double
+
  | colspan="2"| ByteArray(5120)
| Target length of a single side of the world border, in meters.
+
  | The data of the cookie.
|-
 
  | Speed
 
| VarLong
 
  | Number of real-time ''milli''seconds until New Diameter is reached. It appears that Notchian server does not sync world border speed to game ticks, so it gets out of sync with server lag. If the world border is not moving, this is set to 0.
 
 
  |}
 
  |}
==== World Border Size ====
 
  
{| class="wikitable" {{Added}}
+
==== Transfer (play) ====
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="1"| 0x44
 
|rowspan="1"| Play
 
|rowspan="1"| Client
 
| Diameter
 
| Double
 
| Length of a single side of the world border, in meters.
 
|}
 
  
==== World Border Warning Delay ====
+
Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
  
{| class="wikitable" {{Added}}
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="1"| 0x45
+
  | rowspan="2"| 0x72
  |rowspan="1"| Play
+
  | rowspan="2"| Play
  |rowspan="1"| Client
+
  | rowspan="2"| Client
  | Warning Time
+
  | colspan="2"| Host
| VarInt
+
  | colspan="2"| String
| In seconds as set by <code>/worldborder warning time</code>.
+
  | The hostname of IP of the server.
  |}
 
 
 
==== World Border Warning Reach ====
 
 
 
{| class="wikitable" {{Added}}
 
  ! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="1"| 0x46
+
  | colspan="2"| Port
  |rowspan="1"| Play
+
  | colspan="2"| VarInt
|rowspan="1"| Client
+
  | The port of the server.
| Warning Blocks
 
| VarInt
 
  | In meters.
 
 
  |}
 
  |}
  
==== Spawn Position ====
+
==== Update Attributes ====
  
Sent by the server after login to specify the coordinates of the spawn point (the point at which players spawn at, and which the compass points to). It can be sent at any time to update the point compasses point at.
+
Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,642: Line 603:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| {{change|0x42|0x4B}}
+
  | rowspan="6"| 0x71
  |rowspan="4"| Play
+
  | rowspan="6"| Play
  |rowspan="4"| Client
+
  | rowspan="6"| Client
  | Location
+
  | colspan="2"| Entity ID
| Position
+
  | colspan="2"| VarInt
  | Spawn location.
 
|- {{added}}
 
| Angle
 
| Float
 
 
  |
 
  |
|}
 
 
==== Set Title SubTitle ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|- {{ Added }}
 
|rowspan="4"| 0x57
 
|rowspan="4"| Play
 
|rowspan="4"| Client
 
| Subtitle Text
 
| [[Chat]]
 
|- {{ Added }}
 
|}
 
 
 
==== Set Title Text ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|- {{ Added }}
 
|rowspan="4"| 0x59
 
|rowspan="4"| Play
 
|rowspan="4"| Client
 
| Title Text
 
| [[Chat]]
 
|- {{ Added }}
 
|}
 
 
==== Set Title Time====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|- {{ Added }}
 
|rowspan="4"| 0x5A
 
|rowspan="4"| Play
 
|rowspan="4"| Client
 
| Fade In
 
| Int
 
| Ticks to spend fading in.
 
|- {{ Added }}
 
| Stay
 
| Int
 
| Ticks to keep the title displayed.
 
|- {{ Added }}
 
| Fade Out
 
| Int
 
| Ticks to spend out, not when to start fading out.
 
|}
 
 
 
==== Entity Properties ====
 
 
Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
 
  |-
 
  |-
|rowspan="6"| {{change|0x58|0x63}}
+
  | colspan="2"| Number Of Properties
|rowspan="6"| Play
+
  | colspan="2"| VarInt
|rowspan="6"| Client
 
|colspan="2"| Entity ID
 
|colspan="2"| VarInt
 
|
 
|-
 
  |colspan="2"| Number Of Properties
 
  |colspan="2"| {{change|Int|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
  | Identifier
+
  | {{change|Identifier|VarInt Enum}}
 
  | See below.
 
  | See below.
 
  |-
 
  |-
Line 1,768: Line 641:
 
{| class="wikitable"
 
{| class="wikitable"
 
  |-
 
  |-
 +
! Id
 
  ! Key
 
  ! Key
 
  ! Default
 
  ! Default
Line 1,774: Line 648:
 
  ! Label
 
  ! Label
 
  |-
 
  |-
  | generic.max_health
+
  | 0
  | 20.0
+
  | generic.armor
 
  | 0.0
 
  | 0.0
| 1024.0
 
| Max Health.
 
|-
 
| generic.follow_range
 
| 32.0
 
 
  | 0.0
 
  | 0.0
  | 2048.0
+
  | 30.0
  | Follow Range.
+
  | Armor.
 
  |-
 
  |-
  | generic.knockback_resistance
+
| 1
 +
  | generic.armor_toughness
 
  | 0.0
 
  | 0.0
 
  | 0.0
 
  | 0.0
  | 1.0
+
  | 20.0
  | Knockback Resistance.
+
  | Armor Toughness.
|-
 
| generic.movement_speed
 
| 0.7
 
| 0.0
 
| 1024.0
 
| Movement Speed.
 
 
  |-
 
  |-
 +
| 2
 
  | generic.attack_damage
 
  | generic.attack_damage
 
  | 2.0
 
  | 2.0
Line 1,804: Line 669:
 
  | Attack Damage.
 
  | Attack Damage.
 
  |-
 
  |-
 +
| 3
 +
| generic.attack_knockback
 +
| 0.0
 +
| 0.0
 +
| 5.0
 +
| Attack Knockback.
 +
|-
 +
| 4
 
  | generic.attack_speed
 
  | generic.attack_speed
 
  | 4.0
 
  | 4.0
Line 1,809: Line 682:
 
  | 1024.0
 
  | 1024.0
 
  | Attack Speed.
 
  | 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
 
  | generic.flying_speed
 
  | 0.4
 
  | 0.4
Line 1,816: Line 704:
 
  | Flying Speed.
 
  | Flying Speed.
 
  |-
 
  |-
  | generic.armor
+
| 8
 +
  | generic.follow_range
 +
| 32.0
 
  | 0.0
 
  | 0.0
  | 0.0
+
  | 2048.0
| 30.0
+
  | Follow Range.
  | Armor.
 
 
  |-
 
  |-
  | generic.armor_toughness
+
  | 9
 +
| horse.jump_strength
 +
| 0.7
 
  | 0.0
 
  | 0.0
  | 0.0
+
  | 2.0
| 20.0
+
  | Jump Strength.
  | Armor Toughness.
 
 
  |-
 
  |-
  | generic.attack_knockback
+
| 10
 +
  | generic.knockback_resistance
 
  | 0.0
 
  | 0.0
 
  | 0.0
 
  | 0.0
  | 5.0
+
  | 1.0
  | &mdash;
+
  | Knockback Resistance.
 
  |-
 
  |-
 +
| 11
 
  | generic.luck
 
  | generic.luck
 
  | 0.0
 
  | 0.0
Line 1,840: Line 732:
 
  | Luck.
 
  | Luck.
 
  |-
 
  |-
  | horse.jump_strength
+
  | 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
 
  | 0.7
 
  | 0.0
 
  | 0.0
  | 2.0
+
  | 1024.0
  | Jump Strength.
+
  | Movement Speed.
 +
|- {{added}}
 +
| 15
 +
| generic.scale
 +
| 1.0
 +
| 0.0625
 +
| 16.0
 +
| Scale.
 
  |-
 
  |-
 +
| 16
 
  | zombie.spawn_reinforcements
 
  | zombie.spawn_reinforcements
 
  | 0.0
 
  | 0.0
Line 1,851: Line 766:
 
  | 1.0
 
  | 1.0
 
  | Spawn Reinforcements Chance.
 
  | Spawn Reinforcements Chance.
  |-
+
  |- {{added}}
  | generic.reachDistance
+
| 17
  | 5.0
+
  | generic.step_height
 +
  | 0.6
 
  | 0.0
 
  | 0.0
  | 1024.0
+
  | 10.0
  | Player Reach Distance (Forge only).
+
  | Step Height.
|-
 
| forge.swimSpeed
 
| 1.0
 
| 0.0
 
| 1024.0
 
| Swimming Speed (Forge only).
 
 
  |}
 
  |}
 
Unknown attributes will cause a game crash ([https://bugs.mojang.com/browse/MC-150405 MC-150405]) due to the default minimum being larger than the default value.
 
  
 
''Modifier Data'' structure:
 
''Modifier Data'' structure:
Line 1,877: Line 785:
 
  | UUID
 
  | UUID
 
  | UUID
 
  | UUID
  |  
+
  |
 
  |-
 
  |-
 
  | Amount
 
  | Amount
Line 1,896: Line 804:
 
All of the 0's are applied first, and then the 1's, and then the 2's.
 
All of the 0's are applied first, and then the 1's, and then the 2's.
  
==== Tags ====
+
==== Entity Effect ====
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,902: Line 810:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  !colspan="2"| Field Name
+
  ! Field Name
  !colspan="2"| Field Type
+
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="8"| {{change|0x5B|0x66}}
+
  | rowspan="7"| 0x72
  |rowspan="8"| Play
+
  | rowspan="7"| Play
  |rowspan="8"| Client
+
  | rowspan="7"| Client
  |- {{removed}}
+
  | Entity ID
| colspan="2"| Block Tags
+
  | VarInt
| colspan="2"| (See below)
 
| IDs are block IDs
 
|- {{removed}}
 
| colspan="2"| Item Tags
 
| colspan="2"| (See below)
 
| IDs are item IDs
 
|- {{removed}}
 
| colspan="2"| Fluid Tags
 
| colspan="2"| (See below)
 
| IDs are fluid IDs
 
|- {{removed}}
 
| colspan="2"| Entity Tags
 
  | colspan="2"| (See below)
 
| IDs are entity IDs
 
|- {{added}}
 
| colspan="2"| Length of the array
 
| colspan="2"| VarInt
 
|
 
|- {{added}}
 
|rowspan="2"| Array of tags
 
| Tag type
 
|rowspan="2"| Array
 
| Identifier
 
| Tag identifier (Vanilla required tags are <code>minecraft:block</code>, <code>minecraft:item</code>, <code>minecraft:fluid</code>, <code>minecraft:entity_type</code>, and <code>minecraft:game_event</code>)
 
|-
 
| Array of Tag
 
| (See below)
 
 
  |
 
  |
|}
 
 
Tags look like:
 
 
{| class="wikitable"
 
!colspan="2"| Field Name
 
!colspan="2"| Field Type
 
! Notes
 
 
  |-
 
  |-
  |colspan="2"| Length
+
  | Effect ID
  |colspan="2"| VarInt
+
  | VarInt
  | Number of elements in the following array
+
  | See {{Minecraft Wiki|Status effect#Effect list|this table}}.
 
  |-
 
  |-
  |rowspan="3"| Tags
+
  | Amplifier
| Tag name
+
  | Byte
|rowspan="3"| Array
+
  | Notchian client displays effect level as Amplifier + 1.
  | Identifier
 
  |
 
 
  |-
 
  |-
  | Count
+
  | Duration
 
  | VarInt
 
  | VarInt
  | Number of elements in the following array
+
  | Duration in ticks. (-1 for infinite)
 
  |-
 
  |-
  | Entries
+
  | Flags
| Array of VarInt
 
| Numeric ID of the given type (block, item, etc.).
 
|}
 
 
 
 
 
=== Serverbound ===
 
 
 
==== Client Settings ====
 
 
 
Sent when the player connects, or when settings are changed.
 
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|-
 
|rowspan="7"| 0x05
 
|rowspan="7"| Play
 
|rowspan="7"| Server
 
| Locale
 
| String (16)
 
| e.g. <code>en_GB</code>.
 
|-
 
| View Distance
 
 
  | Byte
 
  | Byte
  | Client-side render distance, in chunks.
+
  | Bit field, see below.
|-
+
  |- {{removed}}
| Chat Mode
+
  | Has Factor Data
| VarInt Enum
 
| 0: enabled, 1: commands only, 2: hidden.  See [[Chat#Processing chat|processing chat]] for more information.
 
  |-
 
  | Chat Colors
 
 
  | Boolean
 
  | Boolean
  | “Colors” multiplayer setting.
+
  | Used in DARKNESS effect
|-
+
  |- {{removed}}
| Displayed Skin Parts
+
  | Factor Codec
| Unsigned Byte
+
  | NBT Tag
| Bit mask, see below.
+
  | See below
|-
 
| Main Hand
 
| VarInt Enum
 
| 0: Left, 1: Right.
 
  |- {{Added}}
 
  | Disable text filtering
 
  | Boolean
 
  | Disables filtering of text on signs and written book titles.  Currently always true (i.e. the filtering is disabled)
 
 
  |}
 
  |}
  
''Displayed Skin Parts'' flags:
+
{{Need Info|What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?}}
  
* Bit 0 (0x01): Cape enabled
+
Within flags:
* 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.
+
* 0x01: Is ambient - was the effect spawned from a beacon?  All beacon-generated effects are ambient.  Ambient effects use a different icon in the HUD (blue border rather than gray).  If all effects on an entity are ambient, the [[Entity_metadata#Living Entity|"Is potion effect ambient" living metadata field]] should be set to true.  Usually should not be enabled.
 +
* 0x02: Show particles - should all particles from this effect be hidden?  Effects with particles hidden are not included in the calculation of the effect color, and are not rendered on the HUD (but are still rendered within the inventory).  Usually should be enabled.
 +
* 0x04: Show icon - should the icon be displayed on the client?  Usually should be enabled.
 +
* {{change||0x08: Blend - should the effect's hard-coded blending be applied?  Currently only used in the DARKNESS effect to apply extra void fog and adjust the gamma value for lighting.}}
  
 
+
{{change|Factor Data|}}
==== Window Confirmation (serverbound) ====
+
{| class="wikitable" {{removed}}
 
+
  !Name
If a confirmation sent by the client was not accepted, the server will reply with a [[#Window Confirmation (clientbound)|Window Confirmation (clientbound)]] packet with the Accepted field set to false. When this happens, the client must send this packet to apologize (as with movement), otherwise the server ignores any successive confirmations.
+
  !Type
 
+
  !style="width: 250px;" colspan="2"| Notes
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|- {{ Removed }}
 
|rowspan="3"| 0x07
 
|rowspan="3"| Play
 
|rowspan="3"| Server
 
| Window ID
 
| Byte
 
| The ID of the window that the action occurred in.
 
|- {{ Removed }}
 
| Action Number
 
| Short
 
| Every action that is to be accepted has a unique number. This number is an incrementing integer (starting at 1) with separate counts for each window ID.
 
|- {{ Removed }}
 
| Accepted
 
| Boolean
 
| Whether the action was accepted.
 
|}
 
 
 
==== Click Window ====
 
 
 
This packet is sent by the client when the player clicks on a slot in a window.
 
 
 
{| class="wikitable"
 
  ! Packet ID
 
  ! State
 
  ! Bound To
 
!colspan="2" | Field Name
 
!colspan="2" | Field Type
 
! Notes
 
 
  |-
 
  |-
  |rowspan="9"| {{change|0x09|0x08}}
+
  | padding_duration
  |rowspan="9"| Play
+
  | TAG_INT
  |rowspan="9"| Server
+
  |
|colspan="2" | Window ID
 
|colspan="2" | Unsigned Byte
 
|colspan="2" | The ID of the window which was clicked. 0 for player inventory.
 
 
  |-
 
  |-
  |colspan="2" | Slot
+
  | factor_start
  |colspan="2" | Short
+
  | TAG_FLOAT
  |colspan="2" | The clicked slot number, see below.
+
  |
 
  |-
 
  |-
  |colspan="2" | Button
+
  | factor_target
|colspan="2" | Byte
+
  | TAG_FLOAT
  |colspan="2" | The button used in the click, see below.
+
  |
  |- {{ Removed }}
 
|colspan="2" | Action Number
 
|colspan="2" | Short
 
|colspan="2" | A unique number for the action, implemented by Notchian as a counter, starting at 1 (different counter for every window ID). Used by the server to send back a [[#Window Confirmation (clientbound)|Window Confirmation (clientbound)]].
 
 
  |-
 
  |-
  |colspan="2" | Mode
+
  | factor_current
|colspan="2" | VarInt Enum
+
  | TAG_FLOAT
|colspan="2" | Inventory operation mode, see below.
 
|- {{ Added }}
 
| colspan="2"| Length of the array
 
| colspan="2"| VarInt
 
|
 
|- {{ Added }}
 
|rowspan="2"| Array of slots
 
| Slot number
 
|rowspan="2"| Array
 
  | Short
 
 
  |
 
  |
 
  |-
 
  |-
  | Slot data
+
  | effect_changed_timestamp
  | Slot
+
  | TAG_INT
| New data for this slot
 
|-
 
|colspan="2" | Clicked item
 
|colspan="2" | [[Slot Data|Slot]]
 
|colspan="2" | The clicked slot. Has to be empty (item ID = -1) for drop mode. Is always empty for mode 2 and mode 5 packets.
 
|}
 
 
 
See [[Inventory]] for further information about how slots are indexed.
 
 
 
When right-clicking on a stack of items, half the stack will be picked up and half left in the slot. If the stack is an odd number, the half left in the slot will be smaller of the amounts.
 
 
 
The distinct type of click performed by the client is determined by the combination of the Mode and Button fields.
 
 
 
{| class="wikitable"
 
! Mode
 
! Button
 
! Slot
 
! Trigger
 
|-
 
!rowspan="4"| 0
 
| 0
 
| Normal
 
| Left mouse click
 
 
  |-
 
  |-
  | 1
+
  | factor_previous_frame
  | Normal
+
  | TAG_FLOAT
| Right mouse click
 
 
  |-
 
  |-
  | 0
+
  | had_effect_last_tick
  | -999
+
  | TAG_BOOLEAN
| Left click outside inventory (drop cursor stack)
 
|-
 
| 1
 
| -999
 
| Right click outside inventory (drop cursor single item)
 
|-
 
!rowspan="2"| 1
 
| 0
 
| Normal
 
| Shift + left mouse click
 
|-
 
| 1
 
| Normal
 
| Shift + right mouse click ''(identical behavior)''
 
|-
 
!rowspan="5"| 2
 
| 0
 
| Normal
 
| Number key 1
 
|-
 
| 1
 
| Normal
 
| Number key 2
 
|-
 
| 2
 
| Normal
 
| Number key 3
 
|-
 
| ⋮
 
| ⋮
 
| ⋮
 
|-
 
| 8
 
| Normal
 
| Number key 9
 
|-
 
! 3
 
| 2
 
| Normal
 
| Middle click, only defined for creative players in non-player inventories.
 
|-
 
!rowspan="1"| 4
 
| 0
 
| Normal*
 
| Drop key (Q) (* Clicked item is always empty)
 
|-
 
!rowspan="9"| 5
 
| 0
 
| -999
 
| Starting left mouse drag
 
|-
 
| 4
 
| -999
 
| Starting right mouse drag
 
|-
 
| 8
 
| -999
 
| Starting middle mouse drag, only defined for creative players in non-player inventories.  (Note: the vanilla client will still incorrectly send this for non-creative players - see [https://bugs.mojang.com/browse/MC-46584 MC-46584])
 
|-
 
| 1
 
| Normal
 
| Add slot for left-mouse drag
 
|-
 
| 5
 
| Normal
 
| Add slot for right-mouse drag
 
|-
 
| 9
 
| Normal
 
| Add slot for middle-mouse drag, only defined for creative players in non-player inventories.  (Note: the vanilla client will still incorrectly send this for non-creative players - see [https://bugs.mojang.com/browse/MC-46584 MC-46584])
 
|-
 
| 2
 
| -999
 
| Ending left mouse drag
 
|-
 
| 6
 
| -999
 
| Ending right mouse drag
 
|-
 
| 10
 
| -999
 
| Ending middle mouse drag, only defined for creative players in non-player inventories.  (Note: the vanilla client will still incorrectly send this for non-creative players - see [https://bugs.mojang.com/browse/MC-46584 MC-46584])
 
|-
 
! 6
 
| 0
 
| Normal
 
| Double click
 
 
  |}
 
  |}
 
Starting from version 1.5, “painting mode” is available for use in inventory windows. It is done by picking up stack of something (more than 1 item), then holding mouse button (left, right or middle) and dragging held stack over empty (or same type in case of right button) slots. In that case client sends the following to server after mouse button release (omitting first pickup packet which is sent as usual):
 
 
# packet with mode 5, slot -999, button (0 for left | 4 for right);
 
# packet for every slot painted on, mode is still 5, button (1 | 5);
 
# packet with mode 5, slot -999, button (2 | 6);
 
 
If any of the painting packets other than the “progress” ones are sent out of order (for example, a start, some slots, then another start; or a left-click in the middle) the painting status will be reset.
 
 
The server will send back a [[#Window Confirmation (clientbound)|Window Confirmation]] packet. If the click was not accepted, the client must send a matching [[#Window Confirmation (serverbound)|serverbound window confirmation]] packet before sending more [[#Click Window|Click Window]] packets, otherwise the server will reject them silently. The Notchian server also sends a [[#Window Items|Window Items]] packet for the open window and [[#Set Slot|Set Slot]] packets for the clicked and cursor slot, but only when the click was not accepted, probably to resynchronize client and server.
 
 
==== Pong ====
 
 
A response to the ping packet. Unknown what this is used for, this is ignored by the Notchian client and server.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
|- {{added}}
 
| 0x1D
 
| Play
 
| Server
 
| ID
 
| Int
 
|
 
|}
 
 
== Handshaking ==
 
 
=== Clientbound ===
 
 
There are no clientbound packets in the Handshaking state, since the protocol immediately switches to a different state after the client sends the first packet.
 
  
 
=== Serverbound ===
 
=== Serverbound ===
  
==== Handshake ====
+
==== Cookie Response (play) ====
  
This causes the server to switch into the target state.
+
Response to a [[#Cookie_Request_(play)|Cookie Request (play)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  |rowspan="4"| 0x00
+
  | rowspan="3"| 0x6A
  |rowspan="4"| Handshaking
+
  | rowspan="3"| Play
  |rowspan="4"| Server
+
  | rowspan="3"| Server
  | Protocol Version
+
  | colspan="2"| Key
  | VarInt
+
  | colspan="2"| Identifier
  | See [[protocol version numbers]] (currently {{change|754|{{Snapshot PVN|1073741839}}}})
+
  | The identifier of the cookie.
 
  |-
 
  |-
  | Server Address
+
  | colspan="2"| Has Payload
| String
+
  | colspan="2"| Boolean
  | Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect. The Notchian server does not use this information. Note that SRV records are a {{change|complete|simple}} redirect, e.g. if _minecraft._tcp.example.com points to mc.example.org, users connecting to example.com will provide {{change|mc.|}}example.org as server address in addition to connecting to it.
+
  | The payload is only present if the cookie exists on the client.
  |-
 
| Server Port
 
| Unsigned Short
 
| Default is 25565.  The Notchian server does not use this information.
 
 
  |-
 
  |-
  | Next State
+
  | colspan="2"| Payload
  | VarInt Enum
+
  | colspan="2"| Optional ByteArray(5120)
  | 1 for [[#Status|status]], 2 for [[#Login|login]]
+
  | The data of the cookie, if any.
 
  |}
 
  |}
 
== Status ==
 
 
=== Clientbound ===
 
 
No changes so far.
 
 
=== Serverbound ===
 
 
No changes so far.
 
 
== Login ==
 
 
=== Clientbound ===
 
 
No changes so far.
 
 
=== Serverbound ===
 
 
No changes so far.
 
 
  
 
[[Category:Minecraft Modern]]
 
[[Category:Minecraft Modern]]

Latest revision as of 05:25, 26 February 2024

This page documents the changes from the last stable Minecraft release (currently 1.20.4, protocol 765) to the current pre-release (currently 24w03b, protocol Snapshot 172). Note that this page contains bleeding-edge information that may not be completely or correctly documented.

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

Contents

Data types

No changes so far.

Packets

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

New/modified data types

No changes so far.

Entity Metadata

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

Armadillo

Extends Animal.

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

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Handshake

Serverbound

Handshake

This causes the server to switch into the target state.

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

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

Cookie Request (login)

Requests a cookie that was previously stored.

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

Serverbound

Cookie Response (login)

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

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

Configuration

Clientbound

Cookie Request (configuration)

Requests a cookie that was previously stored.

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

Store Cookie (configuration)

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

Packet ID State Bound To Field Name Field Type Notes
0x09 Configuration Client Key Identifier The identifier of the cookie.
Payload ByteArray(5120) The data of the cookie.

Transfer (configuration)

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

Packet ID State Bound To Field Name Field Type Notes
0x0A Configuration Client Host String The hostname of IP of the server.
Port VarInt The port of the server.

Serverbound

Cookie Response (configuration)

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

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

Play

Clientbound

Cookie Request (play)

Requests a cookie that was previously stored.

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

Store Cookie (play)

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

Packet ID State Bound To Field Name Field Type Notes
0x6A Play Client Key Identifier The identifier of the cookie.
Payload ByteArray(5120) The data of the cookie.

Transfer (play)

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

Packet ID State Bound To Field Name Field Type Notes
0x72 Play Client Host String The hostname of IP of the server.
Port VarInt The port of the server.

Update Attributes

Sets attributes on the given entity.

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

Known Key values (see also Attribute#Modifiers):

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

Modifier Data structure:

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

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

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

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

Entity Effect

Packet ID State Bound To Field Name Field Type Notes
0x72 Play Client Entity ID VarInt
Effect ID VarInt See this table.
Amplifier Byte Notchian client displays effect level as Amplifier + 1.
Duration VarInt Duration in ticks. (-1 for infinite)
Flags Byte Bit field, see below.
Has Factor Data Boolean Used in DARKNESS effect
Factor Codec NBT Tag See below
Huh.png The following information needs to be added to this page:
What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?

Within flags:

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

Factor Data

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

Serverbound

Cookie Response (play)

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

Packet ID State Bound To Field Name Field Type Notes
0x6A Play Server Key Identifier The identifier of the cookie.
Has Payload Boolean The payload is only present if the cookie exists on the client.
Payload Optional ByteArray(5120) The data of the cookie, if any.