Difference between revisions of "Pre-release protocol"

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(Root NBT Tags are now nameless)
m
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This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.1, protocol 763]]) to the current pre-release (currently [[Protocol version numbers|23w31a, protocol {{Snapshot PVN|1073741968}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
+
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.4, protocol 765]]) to the current pre-release (currently [[Protocol version numbers|24w13a, protocol {{Snapshot PVN|1073742006}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
  
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
Line 9: Line 9:
 
=== Data types ===
 
=== Data types ===
  
==== NBT ====
+
No changes so far.
 
 
Root NBT Tags are now always nameless. Below is an exemple of the resulting bytes from an encoded <code>CompoundTag</code> containing an <code>IntTag(42)</code> named <code>test</code>.
 
 
 
<pre>
 
  0A 00 00 03 00 04 74 65 73 74 00 00 00 2A 00 | Before
 
  0A      03 00 04 74 65 73 74 00 00 00 2A 00 | Now
 
</pre>
 
 
 
This affacts all packets and data types containing NBT Tag fields.
 
  
 
=== Packets ===
 
=== Packets ===
Line 27: Line 18:
 
  !colspan="2"| Documentation
 
  !colspan="2"| Documentation
 
  |-
 
  |-
!colspan="4"| Login clientbound
+
!colspan="4"| Handshake serverbound
{{PacketList|0x02|Login Success}}
+
{{PacketList|0x00|Handshake}}
|-
+
|-
!colspan="4"| Login serverbound
+
!colspan="4"| Login clientbound
{{PacketList|0x00|Login Start}}
+
{{PacketList|0x01|Encryption Request}}
{{PacketList|0x03|Login Acknowledged|rel=added}}
+
{{PacketList|0x05|Cookie Request (login)|rel=added}}
|-
+
|-
!colspan="4"| Configuration clientbound
+
!colspan="4"| Login serverbound
{{PacketList|0x00|Plugin Message (configuration)|rel=added}}
+
{{PacketList|0x04|Cookie Response (login)|rel=added}}
{{PacketList|0x01|Disconnect (configuration)|rel=added}}
+
|-
{{PacketList|0x02|Finish Configuration|rel=added}}
+
!colspan="4"| Configuration clientbound
{{PacketList|0x03|Keep Alive (configuration)|rel=added}}
+
{{PacketList|0x00|Cookie Request (configuration)|rel=added}}
{{PacketList|0x04|Ping (configuration)|rel=added}}
+
{{PacketList|{{change|0x00|0x01}}|Clientbound Plugin Message (configuration)|pre=unchanged}}
{{PacketList|0x05|Registry Data|rel=added}}
+
{{PacketList|{{change|0x01|0x02}}|Disconnect (configuration)|pre=unchanged}}
{{PacketList|0x06|Resource Pack (configuration)|rel=added}}
+
{{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
{{PacketList|0x07|Feature Flags|rel=added}}
+
{{PacketList|{{change|0x03|0x04}}|Clientbound Keep Alive (configuration)|pre=unchanged}}
{{PacketList|0x08|Update Tags|rel=added}}
+
{{PacketList|{{change|0x04|0x05}}|Ping (configuration)|pre=unchanged}}
|-
+
{{PacketList|0x06|Reset Chat|rel=added}}
!colspan="4"| Configuration serverbound
+
{{PacketList|{{change|0x05|0x07}}|Registry Data}}
{{PacketList|0x00|Plugin Message (configuration)|rel=added}}
+
{{PacketList|{{change|0x06|0x08}}|Remove Resource Pack (configuration)|pre=unchanged}}
{{PacketList|0x01|Finish Configuration|rel=added}}
+
{{PacketList|{{change|0x07|0x09}}|Add Resource Pack (configuration)|pre=unchanged}}
{{PacketList|0x02|Keep Alive (configuration)|rel=added}}
+
{{PacketList|0x0A|Store Cookie (configuration)|rel=added}}
{{PacketList|0x03|Pong (configuration)|rel=added}}
+
{{PacketList|0x0B|Transfer (configuration)|rel=added}}
{{PacketList|0x04|Resource Pack|rel=added}}
+
{{PacketList|{{change|0x08|0x0C}}|Feature Flags|pre=unchanged}}
|-
+
{{PacketList|{{change|0x09|0x0D}}|Update Tags (configuration)|pre=unchanged}}
!colspan="4"| Play clientbound
+
{{PacketList|0x0E|Clientbound Known Packs|rel=added}}
{{PacketList|0x0D|Chunk Batch Finished|rel=added}}
+
|-
{{PacketList|0x0E|Chunk Batch Start|rel=added}}
+
!colspan="4"| Configuration serverbound
{{PacketList|{{change|0x0D|0x0F}}|Chunk Biomes|pre=unchanged}}
+
{{PacketList|0x01|Cookie Response (configuration)|rel=added}}
{{PacketList|{{change|0x0E|0x10}}|Clear Titles|pre=unchanged}}
+
{{PacketList|{{change|0x01|0x02}}|Serverbound Plugin Message (configuration)|pre=unchanged}}
{{PacketList|{{change|0x0F|0x11}}|Command Suggestions Response|pre=unchanged}}
+
{{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
{{PacketList|{{change|0x10|0x12}}|Commands|pre=unchanged}}
+
{{PacketList|{{change|0x03|0x04}}|Serverbound Keep Alive (configuration)|pre=unchanged}}
{{PacketList|{{change|0x11|0x13}}|Close Container|pre=unchanged}}
+
{{PacketList|{{change|0x04|0x05}}|Pong (configuration)|pre=unchanged}}
{{PacketList|{{change|0x12|0x14}}|Set Container Content|pre=unchanged}}
+
{{PacketList|{{change|0x05|0x06}}|Resource Pack Response (configuration)|pre=unchanged}}
{{PacketList|{{change|0x13|0x15}}|Set Container Property|pre=unchanged}}
+
{{PacketList|0x07|Serverbound Known Packs|rel=added}}
{{PacketList|{{change|0x14|0x16}}|Set Container Slot|pre=unchanged}}
+
|-
{{PacketList|{{change|0x15|0x17}}|Set Cooldown|pre=unchanged}}
+
!colspan="4"| Play clientbound
{{PacketList|{{change|0x16|0x18}}|Chat Suggestions|pre=unchanged}}
+
{{PacketList|0x16|Cookie Request (Play)|rel=added}}
{{PacketList|{{change|0x17|0x19}}|Plugin Message|pre=unchanged}}
+
{{PacketList|{{change|0x16|0x17}}|Set Cooldown|pre=unchanged}}
{{PacketList|{{change|0x18|0x1A}}|Damage Event|pre=unchanged}}
+
{{PacketList|{{change|0x17|0x18}}|Chat Suggestions|pre=unchanged}}
{{PacketList|{{change|0x19|0x1B}}|Delete Message|pre=unchanged}}
+
{{PacketList|{{change|0x18|0x19}}|Clientbound Plugin Message (play)|pre=unchanged}}
{{PacketList|{{change|0x1A|0x1C}}|Disconnect (play)|pre=unchanged}}
+
{{PacketList|{{change|0x19|0x1A}}|Damage Event|pre=unchanged}}
{{PacketList|{{change|0x1B|0x1D}}|Disguised Chat Message|pre=unchanged}}
+
{{PacketList|0x1B|Debug Sample|rel=added}}
{{PacketList|{{change|0x1C|0x1E}}|Entity Event|pre=unchanged}}
+
{{PacketList|{{change|0x1A|0x1C}}|Delete Message|pre=unchanged}}
{{PacketList|{{change|0x1D|0x1F}}|Explosion|pre=unchanged}}
+
{{PacketList|{{change|0x1B|0x1D}}|Disconnect (play)|pre=unchanged}}
{{PacketList|{{change|0x1E|0x20}}|Unload Chunk|pre=unchanged}}
+
{{PacketList|{{change|0x1C|0x1E}}|Disguised Chat Message|pre=unchanged}}
{{PacketList|{{change|0x1F|0x21}}|Game Event|pre=unchanged}}
+
{{PacketList|{{change|0x1D|0x1F}}|Entity Event|pre=unchanged}}
{{PacketList|{{change|0x20|0x22}}|Open Horse Screen|pre=unchanged}}
+
{{PacketList|{{change|0x1E|0x20}}|Explosion|pre=unchanged}}
{{PacketList|{{change|0x21|0x23}}|Hurt Animation|pre=unchanged}}
+
{{PacketList|{{change|0x1F|0x21}}|Unload Chunk|pre=unchanged}}
{{PacketList|{{change|0x22|0x24}}|Initialize World Border|pre=unchanged}}
+
{{PacketList|{{change|0x20|0x22}}|Game Event|pre=unchanged}}
{{PacketList|{{change|0x23|0x25}}|Keep Alive|pre=unchanged}}
+
{{PacketList|{{change|0x21|0x23}}|Open Horse Screen|pre=unchanged}}
{{PacketList|{{change|0x24|0x26}}|Chunk Data and Update Light|pre=unchanged}}
+
{{PacketList|{{change|0x22|0x24}}|Hurt Animation|pre=unchanged}}
{{PacketList|{{change|0x25|0x27}}|World Event|pre=unchanged}}
+
{{PacketList|{{change|0x23|0x25}}|Initialize World Border|pre=unchanged}}
{{PacketList|{{change|0x26|0x28}}|Particle|pre=unchanged}}
+
{{PacketList|{{change|0x24|0x26}}|Clientbound Keep Alive (play)|pre=unchanged}}
{{PacketList|{{change|0x27|0x29}}|Update Light|pre=unchanged}}
+
{{PacketList|{{change|0x25|0x27}}|Chunk Data and Update Light|pre=unchanged}}
{{PacketList|{{change|0x28|0x2A}}|Login (play)}}
+
{{PacketList|{{change|0x26|0x28}}|World Event|pre=unchanged}}
{{PacketList|{{change|0x29|0x2B}}|Map Data|pre=unchanged}}
+
{{PacketList|{{change|0x27|0x29}}|Particle|pre=unchanged}}
{{PacketList|{{change|0x2A|0x2C}}|Merchant Offers|pre=unchanged}}
+
{{PacketList|{{change|0x28|0x2A}}|Update Light|pre=unchanged}}
{{PacketList|{{change|0x2B|0x2D}}|Update Entity Position|pre=unchanged}}
+
{{PacketList|{{change|0x29|0x2B}}|Login (play)}}
{{PacketList|{{change|0x2C|0x2E}}|Update Entity Position and Rotation|pre=unchanged}}
+
{{PacketList|{{change|0x2A|0x2C}}|Map Data|pre=unchanged}}
{{PacketList|{{change|0x2D|0x2F}}|Update Entity Rotation|pre=unchanged}}
+
{{PacketList|{{change|0x2B|0x2D}}|Merchant Offers|pre=unchanged}}
{{PacketList|{{change|0x2E|0x30}}|Move Vehicle|pre=unchanged}}
+
{{PacketList|{{change|0x2C|0x2E}}|Update Entity Position|pre=unchanged}}
{{PacketList|{{change|0x2F|0x31}}|Open Book|pre=unchanged}}
+
{{PacketList|{{change|0x2D|0x2F}}|Update Entity Position and Rotation|pre=unchanged}}
{{PacketList|{{change|0x30|0x32}}|Open Screen|pre=unchanged}}
+
{{PacketList|{{change|0x2E|0x30}}|Update Entity Rotation|pre=unchanged}}
{{PacketList|{{change|0x31|0x33}}|Open Sign Editor|pre=unchanged}}
+
{{PacketList|{{change|0x2F|0x31}}|Move Vehicle|pre=unchanged}}
{{PacketList|{{change|0x32|0x34}}|Ping (play)|pre=unchanged}}
+
{{PacketList|{{change|0x30|0x32}}|Open Book|pre=unchanged}}
{{PacketList|{{change|0x33|0x35}}|Place Ghost Recipe|pre=unchanged}}
+
{{PacketList|{{change|0x31|0x33}}|Open Screen|pre=unchanged}}
{{PacketList|{{change|0x34|0x36}}|Player Abilities|pre=unchanged}}
+
{{PacketList|{{change|0x32|0x34}}|Open Sign Editor|pre=unchanged}}
{{PacketList|{{change|0x35|0x37}}|Player Chat Message|pre=unchanged}}
+
{{PacketList|{{change|0x33|0x35}}|Ping (play)|pre=unchanged}}
{{PacketList|{{change|0x36|0x38}}|End Combat|pre=unchanged}}
+
{{PacketList|{{change|0x34|0x36}}|Ping Response (play)|pre=unchanged}}
{{PacketList|{{change|0x37|0x39}}|Enter Combat|pre=unchanged}}
+
{{PacketList|{{change|0x35|0x37}}|Place Ghost Recipe|pre=unchanged}}
{{PacketList|{{change|0x38|0x3A}}|Combat Death|pre=unchanged}}
+
{{PacketList|{{change|0x36|0x38}}|Player Abilities|pre=unchanged}}
{{PacketList|{{change|0x39|0x3B}}|Player Info Remove|pre=unchanged}}
+
{{PacketList|{{change|0x37|0x39}}|Player Chat Message|pre=unchanged}}
{{PacketList|{{change|0x3A|0x3C}}|Player Info Update|pre=unchanged}}
+
{{PacketList|{{change|0x38|0x3A}}|End Combat|pre=unchanged}}
{{PacketList|{{change|0x3B|0x3D}}|Look At|pre=unchanged}}
+
{{PacketList|{{change|0x39|0x3B}}|Enter Combat|pre=unchanged}}
{{PacketList|{{change|0x3C|0x3E}}|Synchronize Player Position|pre=unchanged}}
+
{{PacketList|{{change|0x3A|0x3C}}|Combat Death|pre=unchanged}}
{{PacketList|{{change|0x3D|0x3F}}|Update Recipe Book|pre=unchanged}}
+
{{PacketList|{{change|0x3B|0x3D}}|Player Info Remove|pre=unchanged}}
{{PacketList|{{change|0x3E|0x40}}|Remove Entities|pre=unchanged}}
+
{{PacketList|{{change|0x3C|0x3E}}|Player Info Update|pre=unchanged}}
{{PacketList|{{change|0x3F|0x41}}|Remove Entity Effect|pre=unchanged}}
+
{{PacketList|{{change|0x3D|0x3F}}|Look At|pre=unchanged}}
{{PacketList|{{change|0x40|0x42}}|Resource Pack|pre=unchanged}}
+
{{PacketList|{{change|0x3E|0x40}}|Synchronize Player Position|pre=unchanged}}
{{PacketList|{{change|0x41|0x43}}|Respawn}}
+
{{PacketList|{{change|0x3F|0x41}}|Update Recipe Book|pre=unchanged}}
{{PacketList|{{change|0x42|0x44}}|Set Head Rotation|pre=unchanged}}
+
{{PacketList|{{change|0x40|0x42}}|Remove Entities|pre=unchanged}}
{{PacketList|{{change|0x43|0x45}}|Update Section Blocks|pre=unchanged}}
+
{{PacketList|{{change|0x41|0x43}}|Remove Entity Effect|pre=unchanged}}
{{PacketList|{{change|0x44|0x46}}|Select Advancements Tab|pre=unchanged}}
+
{{PacketList|{{change|0x42|0x44}}|Reset Score|pre=unchanged}}
{{PacketList|{{change|0x45|0x47}}|Server Data|pre=unchanged}}
+
{{PacketList|{{change|0x43|0x45}}|Remove Resource Pack (play)|pre=unchanged}}
{{PacketList|{{change|0x46|0x48}}|Set Action Bar Text|pre=unchanged}}
+
{{PacketList|{{change|0x44|0x46}}|Add Resource Pack (play)|pre=unchanged}}
{{PacketList|{{change|0x47|0x49}}|Set Border Center|pre=unchanged}}
+
{{PacketList|{{change|0x45|0x47}}|Respawn}}
{{PacketList|{{change|0x48|0x4A}}|Set Border Lerp Size|pre=unchanged}}
+
{{PacketList|{{change|0x46|0x48}}|Set Head Rotation|pre=unchanged}}
{{PacketList|{{change|0x49|0x4B}}|Set Border Size|pre=unchanged}}
+
{{PacketList|{{change|0x47|0x49}}|Update Section Blocks|pre=unchanged}}
{{PacketList|{{change|0x4A|0x4C}}|Set Border Warning Delay|pre=unchanged}}
+
{{PacketList|{{change|0x48|0x4A}}|Select Advancements Tab|pre=unchanged}}
{{PacketList|{{change|0x4B|0x4D}}|Set Border Warning Distance|pre=unchanged}}
+
{{PacketList|{{change|0x49|0x4B}}|Server Data|pre=unchanged}}
{{PacketList|{{change|0x4C|0x4E}}|Set Camera|pre=unchanged}}
+
{{PacketList|{{change|0x4A|0x4C}}|Set Action Bar Text|pre=unchanged}}
{{PacketList|{{change|0x4D|0x4F}}|Set Held Item|pre=unchanged}}
+
{{PacketList|{{change|0x4B|0x4D}}|Set Border Center|pre=unchanged}}
{{PacketList|{{change|0x4E|0x40}}|Set Center Chunk|pre=unchanged}}
+
{{PacketList|{{change|0x4C|0x4E}}|Set Border Lerp Size|pre=unchanged}}
{{PacketList|{{change|0x4F|0x41}}|Set Render Distance|pre=unchanged}}
+
{{PacketList|{{change|0x4D|0x4F}}|Set Border Size|pre=unchanged}}
{{PacketList|{{change|0x50|0x52}}|Set Default Spawn Position|pre=unchanged}}
+
{{PacketList|{{change|0x4E|0x50}}|Set Border Warning Delay|pre=unchanged}}
{{PacketList|{{change|0x51|0x53}}|Display Objective}}
+
{{PacketList|{{change|0x4F|0x51}}|Set Border Warning Distance|pre=unchanged}}
{{PacketList|{{change|0x52|0x54}}|Set Entity Metadata|pre=unchanged}}
+
{{PacketList|{{change|0x50|0x52}}|Set Camera|pre=unchanged}}
{{PacketList|{{change|0x53|0x55}}|Link Entities|pre=unchanged}}
+
{{PacketList|{{change|0x51|0x53}}|Set Held Item|pre=unchanged}}
{{PacketList|{{change|0x54|0x56}}|Set Entity Velocity|pre=unchanged}}
+
{{PacketList|{{change|0x52|0x54}}|Set Center Chunk|pre=unchanged}}
{{PacketList|{{change|0x55|0x57}}|Set Equipment|pre=unchanged}}
+
{{PacketList|{{change|0x53|0x55}}|Set Render Distance|pre=unchanged}}
{{PacketList|{{change|0x56|0x58}}|Set Experience|pre=unchanged}}
+
{{PacketList|{{change|0x54|0x56}}|Set Default Spawn Position|pre=unchanged}}
{{PacketList|{{change|0x57|0x59}}|Set Health|pre=unchanged}}
+
{{PacketList|{{change|0x55|0x57}}|Display Objective|pre=unchanged}}
{{PacketList|{{change|0x58|0x5A}}|Update Objectives|pre=unchanged}}
+
{{PacketList|{{change|0x56|0x58}}|Set Entity Metadata|pre=unchanged}}
{{PacketList|{{change|0x59|0x5B}}|Set Passengers|pre=unchanged}}
+
{{PacketList|{{change|0x57|0x59}}|Link Entities|pre=unchanged}}
{{PacketList|{{change|0x5A|0x5C}}|Update Teams|pre=unchanged}}
+
{{PacketList|{{change|0x58|0x5A}}|Set Entity Velocity|pre=unchanged}}
{{PacketList|{{change|0x5B|0x5D}}|Update Score|pre=unchanged}}
+
{{PacketList|{{change|0x59|0x5B}}|Set Equipment|pre=unchanged}}
{{PacketList|{{change|0x5C|0x5E}}|Set Simulation Distance|pre=unchanged}}
+
{{PacketList|{{change|0x5A|0x5C}}|Set Experience|pre=unchanged}}
{{PacketList|{{change|0x5D|0x5F}}|Set Subtitle Text|pre=unchanged}}
+
{{PacketList|{{change|0x5B|0x5D}}|Set Health|pre=unchanged}}
{{PacketList|{{change|0x5E|0x60}}|Update Time|pre=unchanged}}
+
{{PacketList|{{change|0x5C|0x5E}}|Update Objectives|pre=unchanged}}
{{PacketList|{{change|0x5F|0x61}}|Set Title Text|pre=unchanged}}
+
{{PacketList|{{change|0x5D|0x5F}}|Set Passengers|pre=unchanged}}
{{PacketList|{{change|0x60|0x62}}|Set Title Animation Times|pre=unchanged}}
+
{{PacketList|{{change|0x5E|0x60}}|Update Teams|pre=unchanged}}
{{PacketList|{{change|0x61|0x63}}|Entity Sound Effect|pre=unchanged}}
+
{{PacketList|{{change|0x5F|0x61}}|Update Score|pre=unchanged}}
{{PacketList|{{change|0x62|0x64}}|Sound Effect|pre=unchanged}}
+
{{PacketList|{{change|0x60|0x62}}|Set Simulation Distance|pre=unchanged}}
{{PacketList|0x65|Start Configuration|rel=added}}
+
{{PacketList|{{change|0x61|0x63}}|Set Subtitle Text|pre=unchanged}}
{{PacketList|{{change|0x63|0x66}}|Stop Sound|pre=unchanged}}
+
{{PacketList|{{change|0x62|0x64}}|Update Time|pre=unchanged}}
{{PacketList|{{change|0x64|0x67}}|System Chat Message|pre=unchanged}}
+
{{PacketList|{{change|0x63|0x65}}|Set Title Text|pre=unchanged}}
{{PacketList|{{change|0x65|0x68}}|Set Tab List Header And Footer|pre=unchanged}}
+
{{PacketList|{{change|0x64|0x66}}|Set Title Animation Times|pre=unchanged}}
{{PacketList|{{change|0x66|0x69}}|Tag Query Response|pre=unchanged}}
+
{{PacketList|{{change|0x65|0x67}}|Entity Sound Effect|pre=unchanged}}
{{PacketList|{{change|0x67|0x6A}}|Pickup Item|pre=unchanged}}
+
{{PacketList|{{change|0x66|0x68}}|Sound Effect|pre=unchanged}}
{{PacketList|{{change|0x68|0x6B}}|Teleport Entity|pre=unchanged}}
+
{{PacketList|{{change|0x67|0x69}}|Start Configuration|pre=unchanged}}
{{PacketList|{{change|0x69|0x6C}}|Update Advancements|pre=unchanged}}
+
{{PacketList|{{change|0x68|0x6A}}|Stop Sound|pre=unchanged}}
{{PacketList|{{change|0x6A|0x6D}}|Update Attributes|pre=unchanged}}
+
{{PacketList|0x6B|Store Cookie (Play)|rel=added}}
{{PacketList|0x6B|Feature Flags|pre=removed}}
+
{{PacketList|{{change|0x69|0x6C}}|System Chat Message|pre=unchanged}}
{{PacketList|{{change|0x6C|0x6E}}|Entity Effect|pre=unchanged}}
+
{{PacketList|{{change|0x6A|0x6D}}|Set Tab List Header And Footer|pre=unchanged}}
{{PacketList|{{change|0x6D|0x6F}}|Update Recipes|pre=unchanged}}
+
{{PacketList|{{change|0x6B|0x6E}}|Tag Query Response|pre=unchanged}}
{{PacketList|{{change|0x6E|0x70}}|Update Tags|pre=unchanged}}
+
{{PacketList|{{change|0x6C|0x6F}}|Pickup Item|pre=unchanged}}
|-
+
{{PacketList|{{change|0x6D|0x70}}|Teleport Entity|pre=unchanged}}
!colspan="4"| Play serverbound
+
{{PacketList|{{change|0x6E|0x71}}|Set Ticking State|pre=unchanged}}
{{PacketList|0x07|Chunk Batch Received|rel=added}}
+
{{PacketList|{{change|0x6F|0x72}}|Step Tick|pre=unchanged}}
{{PacketList|{{change|0x07|0x08}}|Client Command|pre=unchanged}}
+
{{PacketList|0x73|Transfer (Play)|rel=added}}
{{PacketList|{{change|0x08|0x09}}|Client Information|pre=unchanged}}
+
{{PacketList|{{change|0x70|0x74}}|Update Advancements|pre=unchanged}}
{{PacketList|{{change|0x09|0x0A}}|Command Suggestions Request|pre=unchanged}}
+
{{PacketList|{{change|0x71|0x75}}|Update Attributes}}
{{PacketList|0x0B|Configuration Acknowledged|rel=added}}
+
{{PacketList|{{change|0x72|0x76}}|Entity Effect}}
{{PacketList|{{change|0x0A|0x0C}}|Click Container Button|pre=unchanged}}
+
{{PacketList|{{change|0x73|0x77}}|Update Recipes|pre=unchanged}}
{{PacketList|{{change|0x0B|0x0D}}|Click Container|pre=unchanged}}
+
{{PacketList|{{change|0x74|0x78}}|Update Tags (play)|pre=unchanged}}
{{PacketList|{{change|0x0C|0x0E}}|Close Container|pre=unchanged}}
+
|-
{{PacketList|{{change|0x0D|0x0F}}|Plugin Message|pre=unchanged}}
+
!colspan="4"| Play serverbound
{{PacketList|{{change|0x0E|0x10}}|Edit Book|pre=unchanged}}
+
{{PacketList|0x04|Chat Command}}
{{PacketList|{{change|0x0F|0x11}}|Query Entity Tag|pre=unchanged}}
+
{{PacketList|0x05|Signed Chat Command|rel=added}}
{{PacketList|{{change|0x10|0x12}}|Interact|pre=unchanged}}
+
{{PacketList|{{change|0x05|0x06}}|Chat Message|pre=unchanged}}
{{PacketList|{{change|0x11|0x13}}|Jigsaw Generate|pre=unchanged}}
+
{{PacketList|{{change|0x06|0x07}}|Player Session|pre=unchanged}}
{{PacketList|{{change|0x12|0x14}}|Keep Alive|pre=unchanged}}
+
{{PacketList|{{change|0x07|0x08}}|Chunk Batch Received|pre=unchanged}}
{{PacketList|{{change|0x13|0x15}}|Lock Difficulty|pre=unchanged}}
+
{{PacketList|{{change|0x08|0x09}}|Client Status|pre=unchanged}}
{{PacketList|{{change|0x14|0x16}}|Set Player Position|pre=unchanged}}
+
{{PacketList|{{change|0x09|0x0A}}|Client Information (play)|pre=unchanged}}
{{PacketList|{{change|0x15|0x17}}|Set Player Position and Rotation|pre=unchanged}}
+
{{PacketList|{{change|0x0A|0x0B}}|Command Suggestions Request|pre=unchanged}}
{{PacketList|{{change|0x16|0x18}}|Set Player Rotation|pre=unchanged}}
+
{{PacketList|{{change|0x0B|0x0C}}|Acknowledge Configuration|pre=unchanged}}
{{PacketList|{{change|0x17|0x19}}|Set Player On Ground|pre=unchanged}}
+
{{PacketList|{{change|0x0C|0x0D}}|Click Container Button|pre=unchanged}}
{{PacketList|{{change|0x18|0x1A}}|Move Vehicle|pre=unchanged}}
+
{{PacketList|{{change|0x0D|0x0E}}|Click Container|pre=unchanged}}
{{PacketList|{{change|0x19|0x1B}}|Paddle Boat|pre=unchanged}}
+
{{PacketList|{{change|0x0E|0x0F}}|Close Container|pre=unchanged}}
{{PacketList|{{change|0x1A|0x1C}}|Pick Item|pre=unchanged}}
+
{{PacketList|{{change|0x0F|0x10}}|Change Container Slot State|pre=unchanged}}
{{PacketList|{{change|0x1B|0x1D}}|Place Recipe|pre=unchanged}}
+
{{PacketList|0x11|Cookie Response (play)|rel=added}}
{{PacketList|{{change|0x1C|0x1E}}|Player Abilities|pre=unchanged}}
+
{{PacketList|{{change|0x10|0x12}}|Serverbound Plugin Message (play)|pre=unchanged}}
{{PacketList|{{change|0x1D|0x1F}}|Player Action|pre=unchanged}}
+
{{PacketList|0x13|Debug Sample Subscription|rel=added}}
{{PacketList|{{change|0x1E|0x20}}|Player Command|pre=unchanged}}
+
{{PacketList|{{change|0x11|0x14}}|Edit Book|pre=unchanged}}
{{PacketList|{{change|0x1F|0x21}}|Player Input|pre=unchanged}}
+
{{PacketList|{{change|0x12|0x15}}|Query Entity Tag|pre=unchanged}}
{{PacketList|{{change|0x20|0x22}}|Pong (play)|pre=unchanged}}
+
{{PacketList|{{change|0x13|0x16}}|Interact|pre=unchanged}}
{{PacketList|{{change|0x21|0x23}}|Change Recipe Book Settings|pre=unchanged}}
+
{{PacketList|{{change|0x14|0x17}}|Jigsaw Generate|pre=unchanged}}
{{PacketList|{{change|0x22|0x24}}|Set Seen Recipe|pre=unchanged}}
+
{{PacketList|{{change|0x15|0x18}}|Serverbound Keep Alive (play)|pre=unchanged}}
{{PacketList|{{change|0x23|0x25}}|Rename Item|pre=unchanged}}
+
{{PacketList|{{change|0x16|0x19}}|Lock Difficulty|pre=unchanged}}
{{PacketList|{{change|0x24|0x26}}|Resource Pack|pre=unchanged}}
+
{{PacketList|{{change|0x17|0x1A}}|Set Player Position|pre=unchanged}}
{{PacketList|{{change|0x25|0x27}}|Seen Advancements|pre=unchanged}}
+
{{PacketList|{{change|0x18|0x1B}}|Set Player Position and Rotation|pre=unchanged}}
{{PacketList|{{change|0x26|0x28}}|Select Trade|pre=unchanged}}
+
{{PacketList|{{change|0x19|0x1C}}|Set Player Rotation|pre=unchanged}}
{{PacketList|{{change|0x27|0x29}}|Set Beacon Effect|pre=unchanged}}
+
{{PacketList|{{change|0x1A|0x1D}}|Set Player On Ground|pre=unchanged}}
{{PacketList|{{change|0x28|0x2A}}|Set Held Item|pre=unchanged}}
+
{{PacketList|{{change|0x1B|0x1E}}|Move Vehicle|pre=unchanged}}
{{PacketList|{{change|0x29|0x2B}}|Program Command Block|pre=unchanged}}
+
{{PacketList|{{change|0x1C|0x1F}}|Paddle Boat|pre=unchanged}}
{{PacketList|{{change|0x2A|0x2C}}|Program Command Block Minecart|pre=unchanged}}
+
{{PacketList|{{change|0x1D|0x20}}|Pick Item|pre=unchanged}}
{{PacketList|{{change|0x2B|0x2D}}|Set Creative Mode Slot|pre=unchanged}}
+
{{PacketList|{{change|0x1E|0x21}}|Ping Request (play)|pre=unchanged}}
{{PacketList|{{change|0x2C|0x2E}}|Program Jigsaw Block|pre=unchanged}}
+
{{PacketList|{{change|0x1F|0x22}}|Place Recipe|pre=unchanged}}
{{PacketList|{{change|0x2D|0x2F}}|Program Structure Block|pre=unchanged}}
+
{{PacketList|{{change|0x20|0x23}}|Player Abilities|pre=unchanged}}
{{PacketList|{{change|0x2E|0x30}}|Update Sign|pre=unchanged}}
+
{{PacketList|{{change|0x21|0x24}}|Player Action|pre=unchanged}}
{{PacketList|{{change|0x2F|0x31}}|Swing Arm|pre=unchanged}}
+
{{PacketList|{{change|0x22|0x25}}|Player Command|pre=unchanged}}
{{PacketList|{{change|0x30|0x32}}|Teleport To Entity|pre=unchanged}}
+
{{PacketList|{{change|0x23|0x26}}|Player Input|pre=unchanged}}
{{PacketList|{{change|0x31|0x33}}|Use Item On|pre=unchanged}}
+
{{PacketList|{{change|0x24|0x27}}|Pong (play)|pre=unchanged}}
{{PacketList|{{change|0x32|0x34}}|Use Item|pre=unchanged}}
+
{{PacketList|{{change|0x25|0x28}}|Change Recipe Book Settings|pre=unchanged}}
|}
+
{{PacketList|{{change|0x26|0x29}}|Set Seen Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x2A}}|Rename Item|pre=unchanged}}
 +
{{PacketList|{{change|0x28|0x2B}}|Resource Pack Response (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2C}}|Seen Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x2A|0x2D}}|Select Trade|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2E}}|Set Beacon Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2F}}|Set Held Item|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x30}}|Program Command Block|pre=unchanged}}
 +
{{PacketList|{{change|0x2E|0x31}}|Program Command Block Minecart|pre=unchanged}}
 +
{{PacketList|{{change|0x2F|0x32}}|Set Creative Mode Slot|pre=unchanged}}
 +
{{PacketList|{{change|0x30|0x33}}|Program Jigsaw Block|pre=unchanged}}
 +
{{PacketList|{{change|0x31|0x34}}|Program Structure Block|pre=unchanged}}
 +
{{PacketList|{{change|0x32|0x35}}|Update Sign|pre=unchanged}}
 +
{{PacketList|{{change|0x33|0x36}}|Swing Arm|pre=unchanged}}
 +
{{PacketList|{{change|0x34|0x37}}|Teleport To Entity|pre=unchanged}}
 +
{{PacketList|{{change|0x35|0x38}}|Use Item On|pre=unchanged}}
 +
{{PacketList|{{change|0x36|0x39}}|Use Item|pre=unchanged}}
 +
|}
  
 
== New/modified data types ==
 
== New/modified data types ==
Line 210: Line 218:
 
== Entity Metadata ==
 
== Entity Metadata ==
  
=== Display ===
+
{{#vardefine: meta_prerelease | 1}}
  
{{Metadata inherit|Display|inherits=Entity|start_at=8}}
+
{{Metadata type definition/begin}}
 +
! Value
 +
! Notes
 +
{{Metadata type definition|Byte}}
 +
| {{Type|Byte}}
 +
|
 +
{{Metadata type definition|VarInt}}
 +
| {{Type|VarInt}}
 +
|
 +
{{Metadata type definition|VarLong}}
 +
| {{Type|VarLong}}
 +
|
 +
{{Metadata type definition|Float}}
 +
| {{Type|Float}}
 +
|
 +
{{Metadata type definition|String}}
 +
| {{Type|String}}
 +
|
 +
{{Metadata type definition|Text Component}}
 +
| {{Type|Text Component}}
 +
|
 +
{{Metadata type definition|Optional Text Component}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|Text Component}})
 +
| Text Component is present if the Boolean is set to true.
 +
{{Metadata type definition|Slot}}
 +
| {{Type|Slot}}
 +
|
 +
{{Metadata type definition|Boolean}}
 +
| {{Type|Boolean}}
 +
|
 +
{{Metadata type definition|Rotations}}
 +
| ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 +
| rotation on x, rotation on y, rotation on z
 +
{{Metadata type definition|Position}}
 +
| {{Type|Position}}
 +
|
 +
{{Metadata type definition|Optional Position}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|Position}})
 +
| Position is present if the Boolean is set to true.
 +
{{Metadata type definition|Direction}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5
 +
{{Metadata type definition|Optional UUID}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|UUID}})
 +
| UUID is present if the Boolean is set to true.
 +
{{Metadata type definition|Block State}}
 +
| {{Type|VarInt}}
 +
| An ID in the block state registry.
 +
{{Metadata type definition|Optional Block State}}
 +
| {{Type|VarInt}}
 +
| 0 for absent (air is unrepresentable); otherwise, an ID in the block state registry.
 +
{{Metadata type definition|NBT}}
 +
| {{Type|NBT}}
 +
|
 +
{{Metadata type definition|Particle}}
 +
| ({{Type|VarInt}}, Varies)
 +
| particle type (an ID in the <code>minecraft:particle_type</code> registry), particle data (See [[Particles]].)
 +
{{Metadata type definition|Particles|rel=added}}
 +
| ({{Type|VarInt}}, Array of Particle)
 +
| length of array, particle data (See directly above.)
 +
{{Metadata type definition|Villager Data}}
 +
| ({{Type|VarInt}}, {{Type|VarInt}}, {{Type|VarInt}})
 +
| villager type, villager profession, level (See below.)
 +
{{Metadata type definition|Optional VarInt}}
 +
| {{Type|VarInt}}
 +
| 0 for absent; 1 + actual value otherwise. Used for entity IDs.
 +
{{Metadata type definition|Pose}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| STANDING = 0, FALL_FLYING = 1, SLEEPING = 2, SWIMMING = 3, SPIN_ATTACK = 4, SNEAKING = 5, LONG_JUMPING = 6, DYING = 7, CROAKING = 8, USING_TONGUE = 9, SITTING = 10, ROARING = 11, SNIFFING = 12, EMERGING = 13, DIGGING = 14{{change||2=, SLIDING = 15, SHOOTING = 16, INHALING = 17}}
 +
{{Metadata type definition|Cat Variant}}
 +
| {{Type|VarInt}}
 +
| An ID in the <code>minecraft:cat_variant</code> registry.
 +
{{Metadata type definition|Wolf Variant|rel=added}}
 +
| {{Type|VarInt}}
 +
| An ID in the <code>minecraft:wolf_variant</code> registry.
 +
{{Metadata type definition|Frog Variant}}
 +
| {{Type|VarInt}}
 +
| An ID in the <code>minecraft:frog_variant</code> registry.
 +
{{Metadata type definition|Optional Global Position}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|Identifier}}, {{Type|Optional}} {{Type|Position}})
 +
| dimension identifier, position; only if the Boolean is set to true.
 +
{{Metadata type definition|Painting Variant}}
 +
| {{Type|VarInt}}
 +
| An ID in the <code>minecraft:painting_variant</code> registry.
 +
{{Metadata type definition|Sniffer State}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
 +
{{Metadata type definition|Armadillo State|rel=added}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| IDLE = 0, ROLLING = 1, SCARED = 2
 +
{{Metadata type definition|Vector3}}
 +
| ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 +
| x, y, z
 +
{{Metadata type definition|Quaternion}}
 +
| ({{Type|Float}}, {{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 +
| x, y, z, w
 +
|}
 +
 
 +
=== Living Entity ===
 +
 
 +
TODO: This has changed to use the PARTICLES attribute
 +
 
 +
=== Wolf ===
 +
 
 +
{{Metadata inherit|Wolf|inherits=Tameable Animal}}
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 219: Line 331:
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 
  ! Default
 
  ! Default
 +
|- {{added}}
 +
| {{Metadata id|}}
 +
| {{Metadata type|Wolf Variant}}
 +
|colspan="2"| Wolf Variant
 +
| PALE
 +
|-
 +
| {{Metadata id|}}
 +
| {{Metadata type|Boolean}}
 +
|colspan="2"| Is begging
 +
| false
 
  |-
 
  |-
 
  | {{Metadata id|}}
 
  | {{Metadata id|}}
  | VarInt
+
  | {{Metadata type|VarInt}}
  |colspan="2"| Interpolation delay
+
  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
  | 0
+
  | 14 (Red)
  |- {{removed}}
+
  |-
 
  | {{Metadata id|}}
 
  | {{Metadata id|}}
  | VarInt
+
  | {{Metadata type|VarInt}}
|colspan="2"| Interpolation Duration
+
  |colspan="2"| Anger time
| 0
 
|- {{added}}
 
| 9
 
| VarInt
 
|colspan="2"| Transformation interpolation duration
 
| 0
 
|- {{added}}
 
| 10
 
| VarInt
 
  |colspan="2"| Position/Rotation interpolation duration
 
 
  | 0
 
  | 0
 +
|}
 +
 +
=== Armadillo ===
 +
 +
{{Metadata inherit|Armadillo|inherits=Animal|start_at=17}}
 +
{| class="wikitable" {{added}}
 +
! Index
 +
! Type
 +
!style="width: 250px;" colspan="2"| Meaning
 +
! Default
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|11}}
+
  | {{Metadata id|added}}
| Vector3
+
| {{Metadata type|Armadillo State}}
  |colspan="2"| Translation
+
  |colspan="2"| Armadillo State
  | (0.0, 0.0, 0.0)
+
| 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.
 +
 
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|12}}
+
  | rowspan="4"| 0x00
  | Vector3
+
  | rowspan="4"| Handshaking
  |colspan="2"| Scale
+
  | rowspan="4"| Server
  | (1.0, 1.0, 1.0)
+
| Protocol Version
 +
| [[#Definitions:varint|VarInt]]
 +
  | See [[protocol version numbers]] (currently 765 in Minecraft 1.20.4).
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|13}}
+
  | Server Address
| Quaternion
+
  | [[#Definitions:string|String]] (255)
  |colspan="2"| Rotation left
+
  | 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.
  | (0.0, 0.0, 0.0, 1.0)
 
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|14}}
+
  | Server Port
| Quaternion
+
  | [[#Definitions:unsigned-short|Unsigned Short]]
  |colspan="2"| Rotation right
+
  | Default is 25565. The Notchian server does not use this information.
  | (0.0, 0.0, 0.0, 1.0)
 
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|15}}
+
  | Next State
  | Byte
+
| [[#Definitions:varint|VarInt]] [[#Definitions:enum|Enum]]
|colspan="2"| Billboard Constraints (0 = FIXED, 1 = VERTICAL, 2 = HORIZONTAL, 3 = CENTER)
+
| 1 for [[#Status|Status]], 2 for [[#Login|Login]]{{change||, 3 for [[#Login|Transfer]]}}.
  | 0
+
  |}
  |-
+
 
  | {{change|{{Metadata id|}}|16}}
+
== Status ==
  | VarInt
+
 
  |colspan="2"| Brightness override (<code>blockLight << 4 | skyLight << 20</code>)
+
=== Clientbound ===
  | -1
+
 
 +
No changes so far.
 +
 
 +
=== Serverbound ===
 +
 
 +
No changes so far.
 +
 
 +
== Login ==
 +
 
 +
=== Clientbound ===
 +
 
 +
==== Encryption Request ====
 +
 
 +
{| class="wikitable"
 +
  ! Packet ID
 +
  ! State
 +
  ! Bound To
 +
  ! Field Name
 +
  ! Field Type
 +
  ! Notes
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|17}}
+
  | rowspan="6"| 0x01
  | Float
+
  | rowspan="6"| Login
  |colspan="2"| View range
+
  | rowspan="6"| Client
  | 1.0
+
| Server ID
 +
| {{Type|String}} (20)
 +
  | Appears to be empty.
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|18}}
+
  | Public Key Length
  | Float
+
| {{Type|VarInt}}
|colspan="2"| Shadow radius
+
  | Length of Public Key.
| 0.0
 
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|19}}
+
  | Public Key
  | Float
+
| {{Type|Byte Array}}
|colspan="2"| Shadow strength
+
  | The server's public key, in bytes.
| 1.0
 
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|20}}
+
  | Verify Token Length
  | Float
+
| {{Type|VarInt}}
|colspan="2"| Width
+
  | Length of Verify Token. Always 4 for Notchian servers.
| 0.0
 
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|21}}
+
| Verify Token
  | Float
+
  | {{Type|Byte Array}}
  |colspan="2"| Height
+
| A sequence of random bytes generated by the server.
  | 0.0
+
|- {{added}}
 +
| Should Authenticate
 +
| {{Type|Boolean}}
 +
  |  
 +
  |}
 +
 
 +
==== Cookie Request (login) ====
 +
 
 +
Requests a cookie that was previously stored.
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
  ! colspan="2"| Field Type
 +
! Notes
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|22}}
+
  | rowspan="1"| 0x05
  | VarInt
+
| rowspan="1"| Login
  |colspan="2"| Glow color override
+
  | rowspan="1"| Client
  | -1
+
| colspan="2"| Key
 +
  | colspan="2"| Identifier
 +
  | The identifier of the cookie.
 
  |}
 
  |}
  
=== Block Display ===
+
=== Serverbound ===
 +
 
 +
==== Cookie Response (login) ====
  
{{Metadata inherit|Block Display|inherits=Display}}
+
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}}
  ! Index
+
  ! Packet ID
  ! Type
+
  ! State
  !style="width: 250px;" colspan="2"| Meaning
+
! Bound To
  ! Default
+
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
  ! Notes
 +
|-
 +
| rowspan="4"| 0x04
 +
| rowspan="4"| Login
 +
| rowspan="4"| Server
 +
| colspan="2"| Key
 +
| colspan="2"| Identifier
 +
| The identifier of the cookie.
 +
|-
 +
| colspan="2"| Has Payload
 +
| colspan="2"| Boolean
 +
| The payload is only present if the cookie exists on the client.
 +
|-
 +
| colspan="2"| Payload Length
 +
| colspan="2"| VarInt
 +
  | Length of the following byte array.
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|23}}
+
  | colspan="2"| Payload
| BlockID
+
  | colspan="2"| Optional Byte Array (5120)
  |colspan="2"| Displayed block state
+
  | The data of the cookie, if any.
  | 0 (Air)
 
 
  |}
 
  |}
  
=== Item Display ===
+
== Configuration ==
 +
 
 +
=== Clientbound ===
 +
 
 +
==== Cookie Request (configuration) ====
  
{{Metadata inherit|Block Display|inherits=Display}}
+
Requests a cookie that was previously stored.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
  ! Index
+
  ! Packet ID
  ! Type
+
  ! State
  !style="width: 250px;" colspan="2"| Meaning
+
! Bound To
  ! Default
+
  ! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
  ! Notes
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|23}}
+
  | rowspan="1"| 0x00
  | Slot
+
| rowspan="1"| Configuration
  |colspan="2"| Displayed item
+
| rowspan="1"| Client
  | Empty
+
  | colspan="2"| Key
 +
  | colspan="2"| Identifier
 +
| The identifier of the cookie.
 +
  |}
 +
 
 +
==== Reset Chat ====
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|24}}
+
  | 0x06
  | Byte
+
| Configuration
  |colspan="2"| Display type:
+
  | Client
* 0 = NONE
+
  | colspan="3"| ''no fields''
* 1 = THIRD_PERSON_LEFT_HAND
 
* 2 = THIRD_PERSON_RIGHT_HAND
 
* 3 = FIRST_PERSON_LEFT_HAND
 
* 4 = FIRST_PERSON_RIGHT_HAND
 
* 5 = HEAD
 
* 6 = GUI
 
* 7 = GROUND
 
* 8 = FIXED
 
| 0 (NONE)
 
 
  |}
 
  |}
  
=== Text Display ===
+
==== Registry Data ====
  
{{Metadata inherit|Text Display|inherits=Display}}
+
Represents certain registries that are sent from the server and are applied on the client. {{change||The packet is sent for each of the following registries: <code>minecraft:worldgen/biome</code>, <code>minecraft:chat_type</code>, <code>minecraft:trim_pattern</code>, <code>minecraft:trim_material</code>, <code>minecraft:wolf_variant</code>, <code>minecraft:dimension_type</code>, <code>minecraft:damage_type</code>, and <code>minecraft:banner_pattern</code>.}}
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! Index
+
  ! Packet ID
  ! Type
+
  ! State
  !style="width: 250px;" colspan="2"| Meaning
+
! Bound To
  ! Default
+
  ! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
  ! Notes
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|23}}
+
  | rowspan="6"| 0x07
  | Chat
+
| rowspan="6"| Configuration
  |colspan="2"| Text
+
| rowspan="6"| Client
  | Empty
+
|{{removed}} colspan="2"| Registry Codec
 +
|{{removed}} colspan="2"| {{Type|NBT}} (Compound)
 +
|{{removed}}| See [[Registry Data]].
 +
|- {{added}}
 +
| colspan="2"| Registry ID
 +
| colspan="2"| Identifier
 +
|
 +
|- {{added}}
 +
| colspan="2"| Entry Count
 +
| colspan="2"| VarInt
 +
| Number of entries in the following array.
 +
|- {{added}}
 +
| rowspan="3"| Entries
 +
| Entry ID
 +
| rowspan="3"| Array
 +
| Identifier
 +
|
 +
|- {{added}}
 +
| Has Data
 +
| Boolean
 +
| Whether the entry has any data following.
 +
|- {{added}}
 +
  | Data
 +
  | NBT Tag
 +
| Entry data. Only present if Has Data is true.
 +
|}
 +
 
 +
==== 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.
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
  ! colspan="2"| Field Type
 +
! Notes
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|24}}
+
  | rowspan="2"| 0x0A
  | VarInt
+
| rowspan="2"| Configuration
  |colspan="2"| Line width
+
| rowspan="2"| Client
  | 200
+
  | colspan="2"| Key
 +
  | colspan="2"| Identifier
 +
  | The identifier of the cookie.
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|25}}
+
  | colspan="2"| Payload
  | VarInt
+
| colspan="2"| ByteArray(5120)
  |colspan="2"| Background color
+
| The data of the cookie.
  | 1073741824 (0x40000000)
+
|}
 +
 
 +
==== Transfer (configuration) ====
 +
 
 +
Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
 +
 
 +
{| class="wikitable" {{added}}
 +
  ! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
  ! colspan="2"| Field Type
 +
  ! Notes
 
  |-
 
  |-
  | {{change|{{Metadata id|}}|26}}
+
  | rowspan="2"| 0x0B
  | Byte
+
| rowspan="2"| Configuration
  |colspan="2"| Text opacity
+
| rowspan="2"| Client
  | -1 (fully opaque)
+
  | colspan="2"| Host
 +
  | colspan="2"| String
 +
  | The hostname of IP of the server.
 
  |-
 
  |-
  | rowspan="5" | {{change|{{Metadata id|}}|27}}
+
  | colspan="2"| Port
| rowspan="5" | Byte
+
| colspan="2"| VarInt
  ! Bit mask
+
| The port of the server.
  ! Meaning
+
|}
  | rowspan="5" | 0
+
 
 +
==== Clientbound Known Packs ====
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
  ! State
 +
  ! Bound To
 +
  ! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 
  |-
 
  |-
  | 0x01 || Has shadow
+
  | rowspan="4"| 0x0E
 +
| rowspan="4"| Configuration
 +
| rowspan="4"| Client
 +
| colspan="2"| Known Pack Count
 +
| colspan="2"| VarInt
 +
| The number of known packs in the following array.
 
  |-
 
  |-
  | 0x02 || Is see through
+
  | rowspan="3"| Known Packs
 +
| Namespace
 +
| rowspan="3"| Array
 +
| String
 +
|
 
  |-
 
  |-
  | 0x04 || Use default background color
+
  | ID
 +
| String
 +
|
 
  |-
 
  |-
  | 0x08 || Alignment:
+
  | Version
* 0 = CENTER
+
| String
* 1 or 3 = LEFT
+
|
* 2 = RIGHT
 
 
  |}
 
  |}
  
== Block Actions ==
+
=== Serverbound ===
  
No changes so far.
+
==== Cookie Response (configuration) ====
  
== Inventories ==
+
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.
  
No changes so far.
+
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="4"| 0x01
 +
| rowspan="4"| Configuration
 +
| rowspan="4"| Server
 +
| colspan="2"| Key
 +
| colspan="2"| Identifier
 +
| The identifier of the cookie.
 +
|-
 +
| colspan="2"| Has Payload
 +
| colspan="2"| Boolean
 +
| The payload is only present if the cookie exists on the client.
 +
|-
 +
| colspan="2"| Payload Length
 +
| colspan="2"| VarInt
 +
| Length of the following byte array.
 +
|-
 +
| colspan="2"| Payload
 +
| colspan="2"| Optional Byte Array (5120)
 +
| The data of the cookie, if any.
 +
|}
  
== Plugin Channels ==
+
==== Serverbound Known Packs ====
  
No changes so far.
+
ID 0x07, same structure as Clientbound Known Packs. If the client specifies a pack in this packet, the server should omit its contained data from Registry Data.
  
 
== Play ==
 
== Play ==
Line 411: Line 725:
 
=== Clientbound ===
 
=== Clientbound ===
  
 +
==== Cookie Request (play) ====
  
==== Chunk Batch Finished ====
+
Requests a cookie that was previously stored.
 
 
{{Need Info|Why does the formula uses <code>25</code> instead of the normal tick duration of <code>50</code>?}}
 
 
 
Marks the end of a chunk batch. The Notchian client marks the time it receives this packet and calculates the ellapsed duration since the [[#Chunk Batch Start|beggining of the chunk batch]]. The server uses this duration and the batch size received in this packet to estimate the number of milliseconds ellapsed per chunk received. This value is then used to calculate the desired number of chunks per tick through the formula <code>25 / millisPerChunk</code>, which is reported to the server through [[#Chunk Batch Received|Chunk Batch Received]].
 
 
 
The Notchian client uses the samples from the latest 15 batches to estimate the milliseconds per chunk number.
 
  
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
Line 424: Line 733:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="1"| 0x0D
+
  | rowspan="1"| 0x16
 
  | rowspan="1"| Play
 
  | rowspan="1"| Play
 
  | rowspan="1"| Client
 
  | rowspan="1"| Client
  | Batch size
+
  | colspan="2"| Key
  | VarInt
+
  | colspan="2"| Identifier
  | Number of chunks.
+
  | The identifier of the cookie.
 
  |}
 
  |}
  
==== Chunk Batch Start ====
+
==== Debug Sample ====
 
 
Marks the start of a chunk batch. The Notchian client marks and stores the time it receives this packet.
 
  
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
Line 448: Line 755:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | 0x0E
+
  | rowspan="3"| 0x1B
  | Play
+
  | rowspan="3"| Play
  | Client
+
  | rowspan="3"| Client
  | colspan="3"| ''no fields''
+
  | Sample Length
 +
| VarInt
 +
| The length of the following array.
 +
|-
 +
| Sample
 +
| Long Array
 +
| TODO: What is the structure of the data in this array?
 +
|-
 +
| Sample Type
 +
| VarInt Enum
 +
| The type of sample data. Currently always 0 (TICK_TIME).
 
  |}
 
  |}
  
 
==== Login (play) ====
 
==== Login (play) ====
 
{{Need Info|Although the number of portal cooldown ticks is included in this packet, the whole portal usage process is still dictated entirely by the server. What kind of effect does this value have on the client, if any?}}
 
 
See [[Protocol Encryption]] for information on logging in.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 468: Line 781:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="26"| {{change|0x28|0x2A}}
+
  | rowspan="22"| 0x2B
  | rowspan="26"| Play
+
  | rowspan="22"| Play
  | rowspan="26"| Client
+
  | rowspan="22"| Client
 
  | Entity ID
 
  | Entity ID
  | Int
+
  | {{Type|Int}}
 
  | The player's Entity ID (EID).
 
  | The player's Entity ID (EID).
 
  |-
 
  |-
 
  | Is hardcore
 
  | Is hardcore
  | Boolean
+
  | {{Type|Boolean}}
 
  |
 
  |
|- {{removed}}
 
| Game mode
 
| Unsigned Byte
 
| 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
 
|- {{removed}}
 
| Previous Game mode
 
| Byte
 
| -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
 
 
  |-
 
  |-
 
  | Dimension Count
 
  | Dimension Count
  | VarInt
+
  | {{Type|VarInt}}
 
  | Size of the following array.
 
  | Size of the following array.
 
  |-
 
  |-
 
  | Dimension Names
 
  | Dimension Names
  | Array of Identifier
+
  | {{Type|Array}} of {{Type|Identifier}}
 
  | Identifiers for all dimensions on the server.
 
  | Identifiers for all dimensions on the server.
|- {{removed}}
 
| Registry Codec
 
| [[NBT|NBT Tag Compound]]
 
| Represents certain registries that are sent from the server and are applied on the client.
 
|- {{removed}}
 
| Dimension Type
 
| Identifier
 
| Name of the dimension type being spawned into.
 
|- {{removed}}
 
| Dimension Name
 
| Identifier
 
| Name of the dimension being spawned into.
 
|- {{removed}}
 
| Hashed seed
 
| Long
 
| First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
 
 
  |-
 
  |-
 
  | Max Players
 
  | Max Players
  | VarInt
+
  | {{Type|VarInt}}
 
  | Was once used by the client to draw the player list, but now is ignored.
 
  | Was once used by the client to draw the player list, but now is ignored.
 
  |-
 
  |-
 
  | View Distance
 
  | View Distance
  | VarInt
+
  | {{Type|VarInt}}
 
  | Render distance (2-32).
 
  | Render distance (2-32).
 
  |-
 
  |-
 
  | Simulation Distance
 
  | Simulation Distance
  | VarInt
+
  | {{Type|VarInt}}
 
  | The distance that the client will process specific things, such as entities.
 
  | The distance that the client will process specific things, such as entities.
 
  |-
 
  |-
 
  | Reduced Debug Info
 
  | Reduced Debug Info
  | Boolean
+
  | {{Type|Boolean}}
 
  | If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
 
  | 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
 
  | Enable respawn screen
  | Boolean
+
  | {{Type|Boolean}}
 
  | Set to false when the doImmediateRespawn gamerule is true.
 
  | Set to false when the doImmediateRespawn gamerule is true.
  |- {{added}}
+
  |-
 +
| Do limited crafting
 +
| {{Type|Boolean}}
 +
| Whether players can only craft recipes they have already unlocked. Currently unused by the client.
 +
|-
 
  | Dimension Type
 
  | Dimension Type
  | Identifier
+
  | {{change|Identifier|VarInt}}
  | Name of the dimension type being spawned into.
+
  | The ID of the type of dimension in the <code>minecraft:dimension_type</code> registry, defined by the Registry Data packet.
  |- {{added}}
+
  |-
 
  | Dimension Name
 
  | Dimension Name
  | Identifier
+
  | {{Type|Identifier}}
 
  | Name of the dimension being spawned into.
 
  | Name of the dimension being spawned into.
  |- {{added}}
+
  |-
 
  | Hashed seed
 
  | Hashed seed
  | Long
+
  | {{Type|Long}}
 
  | First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise  
 
  | First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise  
  |- {{added}}
+
  |-
 
  | Game mode
 
  | Game mode
  | Unsigned Byte
+
  | {{Type|Unsigned Byte}}
 
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
 
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
  |- {{added}}
+
  |-
 
  | Previous Game mode
 
  | Previous Game mode
  | Byte
+
  | {{Type|Byte}}
 
  | -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
 
  | -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
 
  |-
 
  |-
 
  | Is Debug
 
  | Is Debug
  | Boolean
+
  | {{Type|Boolean}}
 
  | True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
 
  | True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
 
  |-
 
  |-
 
  | Is Flat
 
  | Is Flat
  | Boolean
+
  | {{Type|Boolean}}
 
  | True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
 
  | True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
 
  |-
 
  |-
 
  | Has death location
 
  | Has death location
  | Boolean
+
  | {{Type|Boolean}}
 
  | If true, then the next two fields are present.
 
  | If true, then the next two fields are present.
 
  |-
 
  |-
 
  | Death dimension name
 
  | Death dimension name
  | Optional Identifier
+
  | {{Type|Optional}} {{Type|Identifier}}
 
  | Name of the dimension the player died in.
 
  | Name of the dimension the player died in.
 
  |-
 
  |-
 
  | Death location
 
  | Death location
  | Optional Position
+
  | {{Type|Optional}} {{Type|Position}}
 
  | The location that the player died at.
 
  | The location that the player died at.
 
  |-
 
  |-
 
  | Portal cooldown
 
  | Portal cooldown
  | VarInt
+
  | {{Type|VarInt}}
 
  | The number of ticks until the player can use the portal again.
 
  | The number of ticks until the player can use the portal again.
 +
|-
 +
| Enforces Secure Chat
 +
| {{Type|Boolean}}
 +
|
 
  |}
 
  |}
  
 
==== Respawn ====
 
==== Respawn ====
 
{{Need Info|Although the number of portal cooldown ticks is included in this packet, the whole portal usage process is still dictated entirely by the server. What kind of effect does this value have on the client, if any?}}
 
 
To change the player's dimension (overworld/nether/end), send them a respawn packet with the appropriate dimension, followed by prechunks/chunks for the new dimension, and finally a position and look packet. You do not need to unload chunks, the client will do it automatically.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 590: Line 883:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="12"| {{change|0x41|0x43}}
+
  | rowspan="12"| 0x47
 
  | rowspan="12"| Play
 
  | rowspan="12"| Play
 
  | rowspan="12"| Client
 
  | rowspan="12"| Client
 
  | Dimension Type
 
  | Dimension Type
  | Identifier
+
  | {{change|Identifier|VarInt}}
  | Valid dimensions are defined per dimension registry sent in [[#Login (play)|Login (play)]]
+
  | The ID of the type of dimension in the <code>minecraft:dimension_type</code> registry, defined by the [[Protocol#Registry_Data|Registry Data]] packet.
 
  |-
 
  |-
 
  | Dimension Name
 
  | Dimension Name
  | Identifier
+
  | {{Type|Identifier}}
 
  | Name of the dimension being spawned into.
 
  | Name of the dimension being spawned into.
 
  |-
 
  |-
 
  | Hashed seed
 
  | Hashed seed
  | Long
+
  | {{Type|Long}}
 
  | First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
 
  | First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
 
  |-
 
  |-
 
  | Game mode
 
  | Game mode
  | Unsigned Byte
+
  | {{Type|Unsigned Byte}}
 
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
 
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
 
  |-
 
  |-
 
  | Previous Game mode
 
  | Previous Game mode
  | Byte
+
  | {{Type|Byte}}
 
  | -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
 
  | -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
 
  |-
 
  |-
 
  | Is Debug
 
  | Is Debug
  | Boolean
+
  | {{Type|Boolean}}
 
  | True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
 
  | True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
 
  |-
 
  |-
 
  | Is Flat
 
  | Is Flat
  | Boolean
+
  | {{Type|Boolean}}
 
  | True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
 
  | 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.
|- {{removed}}
 
| Data kept
 
| Byte
 
| Bit mask. 0x01: Keep attributes, 0x02: Keep metadata. Tells which data should be kept on the client side once the player has respawned.
 
In the Notchian implementation, this is context dependent:
 
* normal respawns (after death) keep no data;
 
* exiting the end poem/credits keeps the attributes;
 
* other dimension changes (portals or teleports) keep all data.
 
 
  |-
 
  |-
 
  | Has death location
 
  | Has death location
  | Boolean
+
  | {{Type|Boolean}}
 
  | If true, then the next two fields are present.
 
  | If true, then the next two fields are present.
 
  |-
 
  |-
 
  | Death dimension Name
 
  | Death dimension Name
  | Optional Identifier
+
  | {{Type|Optional}} {{Type|Identifier}}
 
  | Name of the dimension the player died in.
 
  | Name of the dimension the player died in.
 
  |-
 
  |-
 
  | Death location
 
  | Death location
  | Optional Position
+
  | {{Type|Optional}} {{Type|Position}}
 
  | The location that the player died at.
 
  | The location that the player died at.
 
  |-
 
  |-
 
  | Portal cooldown
 
  | Portal cooldown
  | VarInt
+
  | {{Type|VarInt}}
 
  | The number of ticks until the player can use the portal again.
 
  | The number of ticks until the player can use the portal again.
|}
 
 
{{Warning2|Avoid changing player's dimension to same dimension they were already in unless they are dead. If you change the dimension to one they are already in, weird bugs can occur, such as the player being unable to attack other players in new world (until they die and respawn).
 
 
Before 1.16, if you must respawn a player in the same dimension without killing them, send two respawn packets, one to a different world and then another to the world you want. You do not need to complete the first respawn; it only matters that you send two packets.}}
 
 
==== Display Objective ====
 
 
This is sent to the client when it should display a scoreboard.
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | rowspan="2"| {{change|0x51|0x53}}
+
  | Data kept
| rowspan="2"| Play
+
  | {{Type|Byte}}
| rowspan="2"| Client
+
  | Bit mask. 0x01: Keep attributes, 0x02: Keep metadata. Tells which data should be kept on the client side once the player has respawned.
| Position
+
In the Notchian implementation, this is context dependent:
  | {{change|Byte|VarInt}}
+
* normal respawns (after death) keep no data;
  | The position of the scoreboard. 0: list, 1: sidebar, 2: below name, 3 - 18: team specific sidebar, indexed as 3 + team color.
+
* exiting the end poem/credits keeps the attributes;
|-
+
* other dimension changes (portals or teleports) keep all data.
| Score Name
 
| String (32767)
 
| The unique name for the scoreboard to be displayed.
 
 
  |}
 
  |}
  
==== Start Configuration ====
+
==== Store Cookie (play) ====
  
Sent during gameplay in order to redo the configuration process. The client must respond with [[#Configuration Acknowledged|Configuration Acknowledged]] for the process to start.
+
Stores some arbitrary data on the client, which persists between server transfers. The Notchian client only accepts cookies of up to 5 kiB in size.
  
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
Line 682: Line 947:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="1"| 0x65
+
  | rowspan="3"| 0x6B
  | rowspan="1"| Play
+
  | rowspan="3"| Play
  | rowspan="1"| Client
+
  | rowspan="3"| Client
  | colspan="3"| ''no fields''
+
  | colspan="2"| Key
  |}
+
  | colspan="2"| Identifier
 
+
  | The identifier of the cookie.
This packet switches the connection state to [[#Configuration|configuration]].
 
 
 
==== Feature Flags ====
 
 
 
Used to enable and disable features, generally experimental ones, on the client.
 
 
 
{| class="wikitable" {{removed}}
 
  ! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | rowspan="2"| 0x6B
+
  | colspan="2"| Payload Length
  | rowspan="2"| Play
+
  | colspan="2"| VarInt
| rowspan="2"| Client
+
  | Length of the following byte array.
| Total Features
 
| VarInt
 
  | Number of features that appear in the array below.
 
 
  |-
 
  |-
  | Feature Flags
+
  | colspan="2"| Payload
  | Identifier Array
+
  | colspan="2"| Byte Array (5120)
  |
+
  | The data of the cookie.
 
  |}
 
  |}
  
=== Serverbound ===
+
==== Transfer (play) ====
 
 
==== Chunk Batch Received ====
 
 
 
Notifies the server that the chunk batch has been received by the client. The server uses the value sent in this packet to adjust the number of chunks to be sent in a batch.
 
  
The Notchian server will stop sending further chunk data until the client acknowledges the sent chunk batch. After the first acknowledgement, the server adjusts this number to allow up to 10 unacknowledged batches.
+
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}}
Line 730: Line 975:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="1"| 0x07
+
  | rowspan="2"| 0x73
  | rowspan="1"| Play
+
  | rowspan="2"| Play
  | rowspan="1"| Server
+
  | rowspan="2"| Client
  | Chunks per tick
+
  | colspan="2"| Host
  | Float
+
  | colspan="2"| String
| Desired chunks per tick.
+
  | The hostname of IP of the server.
  |}
 
 
 
==== Configuration Acknowledged ====
 
 
 
Sent by the client upon receiving a [[#Start Configuration|Start Configuration]] packet from the server.
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | rowspan="1"| 0x0B
+
  | colspan="2"| Port
  | rowspan="1"| Play
+
  | colspan="2"| VarInt
| rowspan="1"| Server
+
  | The port of the server.
  | colspan="3"| ''no fields''
 
 
  |}
 
  |}
  
This packet switches the connection state to [[#Configuration|configuration]].
+
==== Update Attributes ====
  
== Status ==
+
Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
 
 
=== Clientbound ===
 
 
 
No changes so far.
 
 
 
=== Serverbound ===
 
 
 
No changes so far.
 
 
 
== Login ==
 
 
 
=== Clientbound ===
 
 
 
==== Login Success ====
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 786: Line 1,003:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="7"| 0x02
+
  | rowspan="6"| 0x71
  | rowspan="7"| Login
+
  | rowspan="6"| Play
  | rowspan="7"| Client
+
  | rowspan="6"| Client
  | colspan="2"| UUID
+
  | colspan="2"| Entity ID
  | colspan="2"| UUID
+
  | colspan="2"| VarInt
  | colspan="2"|
+
  |
|-
 
| colspan="2"| Username
 
| colspan="2"| String (16)
 
| colspan="2"|
 
 
  |-
 
  |-
 
  | colspan="2"| Number Of Properties
 
  | colspan="2"| Number Of Properties
Line 802: Line 1,015:
 
  |-
 
  |-
 
  | rowspan="4"| Property
 
  | rowspan="4"| Property
  | Name
+
  | {{change|Key|Id}}
 
  | rowspan="4"| Array
 
  | rowspan="4"| Array
  | String (32767)
+
  | {{change|Identifier|VarInt Enum}}
  | colspan="2"|
+
  | See below.
 
  |-
 
  |-
 
  | Value
 
  | Value
  | String (32767)
+
  | Double
  | colspan="1"|
+
  | See below.
 
  |-
 
  |-
  | Is Signed
+
  | Number Of Modifiers
  | Boolean
+
  | VarInt
  | colspan="2"|
+
  | Number of elements in the following array.
 
  |-
 
  |-
  | Signature
+
  | Modifiers
  | Optional String (32767)
+
  | Array of Modifier Data
  | Only if Is Signed is true.
+
  | See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
 
  |}
 
  |}
  
This packet switches the connection state to {{change|[[#Play|play]]|[[#Configuration|configuration]]}}.
+
Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
 
 
=== Serverbound ===
 
  
==== Login Start  ====
+
These changed between 24w03b and 24w13a, TODO: Update this
  
 
{| class="wikitable"
 
{| class="wikitable"
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | rowspan="3"| 0x00
+
  ! Id
  | rowspan="3"| Login
+
  ! Key
  | rowspan="3"| Server
+
  ! Default
  | Name
+
  ! Min
  | String (16)
+
  ! Max
  | Player's Username.
+
  ! Label
|- {{removed}}
 
| Has Player UUID
 
| Boolean
 
| Whether or not the next field should be sent.
 
 
  |-
 
  |-
  | Player UUID
+
  | 0
  | {{change|Optional}} UUID
+
  | generic.armor
  | The UUID of the player logging in. {{change|Only sent if Has Player UUID is true.}}
+
  | 0.0
  |}
+
| 0.0
 
+
  | 30.0
==== Login Acknowledged ====
+
| Armor.
 
 
Acknowledgement to the [[Protocol#Login_Success|Login Success]] packet sent by the server.
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | 0x03
+
  | 1
  | Login
+
  | generic.armor_toughness
  | Server
+
  | 0.0
  | colspan="3"| ''no fields''
+
  | 0.0
  |}
+
  | 20.0
 
+
| Armor Toughness.
== Configuration ==
 
 
 
=== Clientbound ===
 
 
 
==== Plugin Message (configuration) ====
 
 
 
{{Main|Plugin channels}}
 
 
 
Mods and plugins can use this to send their data. Minecraft itself uses several [[plugin channel]]s. These internal channels are in the <code>minecraft</code> namespace.
 
 
 
More information on how it works on [https://dinnerbone.com/blog/2012/01/13/minecraft-plugin-channels-messaging/ Dinnerbone's blog]. More documentation about internal and popular registered channels are [[plugin channel|here]].
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | rowspan="2"| 0x00
+
  | 2
  | rowspan="2"| Configuration
+
  | generic.attack_damage
  | rowspan="2"| Client
+
  | 2.0
  | Channel
+
  | 0.0
  | Identifier
+
  | 2048.0
  | Name of the [[plugin channel]] used to send the data.
+
  | Attack Damage.
 
  |-
 
  |-
  | Data
+
  | 3
  | Byte Array (1048576)
+
  | generic.attack_knockback
  | Any data. The length of this array must be inferred from the packet length.
+
  | 0.0
  |}
+
  | 0.0
 
+
| 5.0
In Notchian client, the maximum data length is 1048576 bytes.
+
  | Attack Knockback.
 
 
==== Disconnect (configuration) ====
 
 
 
{| class="wikitable" {{added}}
 
  ! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | 0x01
+
  | 4
  | Configuration
+
  | generic.attack_speed
  | Client
+
  | 4.0
  | Reason
+
  | 0.0
  | [[Chat]]
+
  | 1024.0
  | The reason why the player was disconnected.
+
  | Attack Speed.
  |}
+
  |- {{added}}
 
+
| 5
==== Finish Configuration ====
+
| generic.block_interaction_range
 
+
| 4.5
Sent by the server to notify the client that the configuration process has finished. The client answers with its own [[#Finish_Configuration_2|Finish Configuration]] whenever it is ready to continue.
+
| 0.0
 
+
| 64.0
{| class="wikitable" {{added}}
+
| Block Interaction Range.
  ! Packet ID
+
|- {{added}}
  ! State
+
  | 6
  ! Bound To
+
  | generic.entity_interaction_range
  ! Field Name
+
  | 3.0
  ! Field Type
+
  | 0.0
  ! Notes
+
  | 64.0
 +
  | Entity Interaction Range.
 
  |-
 
  |-
  | rowspan="1"| 0x02
+
  | 7
  | rowspan="1"| Configuration
+
  | generic.flying_speed
  | rowspan="1"| Client
+
  | 0.4
  | colspan="3"| ''no fields''
+
  | 0.0
  |}
+
  | 1024.0
 
+
| Flying Speed.
This packet switches the connection state to [[#Play|play]].
 
 
 
==== Keep Alive (configuration) ====
 
 
 
The server will frequently send out a keep-alive, each containing a random ID. The client must respond with the same payload (see [[#Keep Alive (configuration) 2|serverbound Keep Alive]]). If the client does not respond to them for over 30 seconds, the server kicks the client. Vice versa, if the server does not send any keep-alives for 20 seconds, the client will disconnect and yields a "Timed out" exception.
 
 
 
The Notchian server uses a system-dependent time in milliseconds to generate the keep alive ID value.
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | 0x03
+
  | 8
  | Configuration
+
  | generic.follow_range
  | Client
+
  | 32.0
  | Keep Alive ID
+
  | 0.0
| Long
+
  | 2048.0
  |
+
  | Follow Range.
  |}
 
 
 
==== Ping (configuration) ====
 
 
 
Packet is not used by the Notchian server. When sent to the client, client responds with a [[#Pong (configuration)|Pong]] packet with the same id.
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | 0x04
+
  | 9
  | Configuration
+
  | horse.jump_strength
  | Client
+
  | 0.7
  | ID
+
  | 0.0
  | Int
+
  | 2.0
  |
+
  | Jump Strength.
|}
 
 
 
==== Registry Data ====
 
 
 
Represents certain registries that are sent from the server and are applied on the client.
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | rowspan="1"| 0x05
+
  | 10
  | rowspan="1"| Configuration
+
  | generic.knockback_resistance
  | rowspan="1"| Client
+
  | 0.0
| Registry Codec
+
  | 0.0
| [[NBT|NBT Tag Compound]]
+
  | 1.0
  | Information included below.
+
  | Knockback Resistance.
  |}
 
 
 
 
 
The '''Registry Codec''' NBT Tag Compound ([https://gist.github.com/rj00a/f2970a8ce4d09477ec8f16003b9dce86 Default value in JSON as of 1.19], [https://gist.github.com/nikes/aff59b758a807858da131a1881525b14 1.19.2], [https://pastebin.com/guryvw56 1.20.1]) includes three registries: "minecraft:dimension_type", "minecraft:worldgen/biome", and "minecraft:chat_type".
 
 
 
{| class="wikitable"
 
  !Name
 
!Type
 
!style="width: 250px;" colspan="2"| Notes
 
 
  |-
 
  |-
  | minecraft:dimension_type
+
  | 11
  | TAG_Compound
+
  | generic.luck
  | The dimension type registry (see below).
+
  | 0.0
 +
| -1024.0
 +
| 1024.0
 +
| Luck.
 
  |-
 
  |-
  | minecraft:worldgen/biome
+
  | 12
  | TAG_Compound
+
  | generic.max_absorption
  | The biome registry (see below).
+
  | 0.0
 +
| 0.0
 +
| 2048.0
 +
| Max Absorption.
 
  |-
 
  |-
  | minecraft:chat_type
+
  | 13
  | TAG_Compound
+
  | generic.max_health
  | The chat type registry (see below).
+
  | 20.0
  |}
+
  | 1.0
 
+
| 1024.0
Dimension type registry:
+
  | Max Health.
 
 
{| class="wikitable"
 
!Name
 
!Type
 
  !style="width: 250px;" colspan="2"| Notes
 
 
  |-
 
  |-
  | type
+
  | 14
  | TAG_String
+
  | generic.movement_speed
  | The name of the registry. Always "minecraft:dimension_type".
+
| 0.7
 +
| 0.0
 +
| 1024.0
 +
| Movement Speed.
 +
|- {{added}}
 +
| 15
 +
| generic.scale
 +
  | 1.0
 +
| 0.0625
 +
| 16.0
 +
| Scale.
 
  |-
 
  |-
  | value
+
  | 16
  | TAG_List
+
  | zombie.spawn_reinforcements
  | List of dimension types registry entries (see below).
+
  | 0.0
 +
| 0.0
 +
| 1.0
 +
| Spawn Reinforcements Chance.
 +
|- {{added}}
 +
| 17
 +
| generic.step_height
 +
| 0.6
 +
| 0.0
 +
| 10.0
 +
| Step Height.
 
  |}
 
  |}
  
Dimension type registry entry:
+
''Modifier Data'' structure:
  
 
{| class="wikitable"
 
{| class="wikitable"
!Name
 
!Type
 
!style="width: 250px;" colspan="2"| Notes
 
 
  |-
 
  |-
  | name
+
  ! Field Name
  | TAG_String
+
  ! Field Type
  | The name of the dimension type (for example, "minecraft:overworld").
+
  ! Notes
|-
 
| id
 
| TAG_Int
 
| The protocol ID of the dimension (matches the index of the element in the registry list).
 
 
  |-
 
  |-
  | element
+
  | UUID
  | TAG_Compound
+
  | UUID
| 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.
 
|-
 
| has_raids
 
| TAG_Byte
 
| colspan="2"| Whether players with the Bad Omen effect can cause a raid.
 
| 1: true, 0: false.
 
|-
 
| monster_spawn_light_level
 
| TAG_Int or TAG_Compound
 
| Possibly the light level(s) at which monsters can spawn.
 
| colspan="2"| When TAG_Int, 0 - 15. When TAG_Compound, contains the fields: type (TAG_String), appears to be always "minecraft:uniform", and value (TAG_Compound), which contains the fields: max_inclusive (TAG_Int), min_inclusive (TAG_Int).
 
|-
 
| monster_spawn_block_light_limit
 
| TAG_Int
 
| colspan="2"|
 
 
  |
 
  |
 
  |-
 
  |-
  | natural
+
  | Amount
  | TAG_Byte
+
  | Double
  | colspan="2"| When false, compasses spin randomly. When true, nether portals can spawn zombified piglins.
+
  | May be positive or negative.
| 1: true, 0: false.
 
 
  |-
 
  |-
  | ambient_light
+
  | Operation
  | TAG_Float
+
  | Byte
  | colspan="2"| How much light the dimension has.
+
  | See below.
| 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.
 
|-
 
| min_y
 
| TAG_Int
 
| colspan="2"| The minimum Y level.
 
| A multiple of 16. Example: -64
 
|-
 
| height
 
| TAG_Int
 
| colspan="2"| The maximum height.
 
| A multiple of 16. Example: 256
 
|-
 
| logical_height
 
| TAG_Int
 
| colspan="2"| The maximum height to which chorus fruits and nether portals can bring players within this dimension. (Must be lower than height)
 
| 0-384.
 
|-
 
| coordinate_scale
 
| TAG_Double
 
| colspan="2"| The multiplier applied to coordinates when traveling to the dimension.
 
| 0.00001 - 30000000.0
 
|-
 
| 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:
+
The operation controls how the base value of the modifier is changed.
  
{| class="wikitable"
+
* 0: Add/subtract amount
!Name
+
* 1: Add/subtract amount percent of the current value
!Type
+
* 2: Multiply by amount percent
!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:
+
All of the 0's are applied first, and then the 1's, and then the 2's.
  
{| class="wikitable"
+
==== Entity Effect ====
!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:
 
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! colspan="3"|Name
+
  ! Packet ID
  ! colspan="2"|Type
+
! State
  !style="width: 250px;" colspan="2"| Meaning
+
! Bound To
  ! colspan="2"|Values
+
  ! Field Name
 +
  ! Field Type
 +
  ! Notes
 
  |-
 
  |-
  | colspan="3"|has_precipitation
+
  | rowspan="7"| 0x72
  | colspan="2"|TAG_Byte
+
  | rowspan="7"| Play
  | colspan="2"| Determines whether or not the biome has precipitation.
+
  | rowspan="7"| Client
  | colspan="2"| 1: true, 0: false.
+
  | Entity ID
 +
| VarInt
 +
|
 
  |-
 
  |-
  | colspan="3"| depth
+
  | Effect ID
  | colspan="2"| Optional TAG_Float
+
  | VarInt
  | colspan="2"| The depth factor of the biome.
+
  | See {{Minecraft Wiki|Status effect#Effect list|this table}}.
| colspan="2"| The default values vary between 1.5 and -1.8.
 
 
  |-
 
  |-
  | colspan="3"| temperature
+
  | Amplifier
  | colspan="2"| TAG_Float
+
  | Byte
  | colspan="2"| The temperature factor of the biome.
+
  | Notchian client displays effect level as Amplifier + 1.
| colspan="2"| The default values vary between 2.0 and -0.5.
 
 
  |-
 
  |-
  | colspan="3"| scale
+
  | Duration
  | colspan="2"| Optional TAG_Float
+
  | VarInt
  | colspan="2"| ?
+
  | Duration in ticks. (-1 for infinite)
| colspan="2"| The default values vary between 1.225 and 0.0.
 
 
  |-
 
  |-
  | colspan="3"| downfall
+
  | Flags
  | colspan="2"| TAG_Float
+
  | Byte
  | colspan="2"| ?
+
  | Bit field, see below.
| colspan="2"| The default values vary between 1.0 and 0.0.
+
  |- {{removed}}
|-
+
  | Has Factor Data
| colspan="3"| category
+
  | Boolean
| colspan="2"| Optional TAG_String
+
  | Used in DARKNESS effect
| colspan="2"| The category of the biome.
+
  |- {{removed}}
| 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".
+
  | Factor Codec
|-
+
  | NBT Tag
| colspan="3"| temperature_modifier
+
  | See below
| colspan="2"| Optional TAG_String
 
| colspan="2"| ?
 
| colspan="2"| The only known value is "frozen".
 
|-
 
| rowspan="13"| effects
 
| colspan="2"| sky_color
 
| rowspan="11"| TAG_Compound
 
| TAG_Int
 
| colspan="2"| The color of the sky.
 
| Example: 8364543, which is #7FA1FF in RGB.
 
  |-
 
  | colspan="2"| water_fog_color
 
| TAG_Int
 
  | colspan="2"| Possibly the tint color when swimming.
 
  | Example: 8364543, which is #7FA1FF in RGB.
 
|-
 
| colspan="2"| 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.
 
  |-
 
  | colspan="2"| water_color
 
  | TAG_Int
 
  | colspan="2"| The tint color of the water blocks.
 
| Example: 8364543, which is #7FA1FF in RGB.
 
|-
 
| colspan="2"| foliage_color
 
| Optional TAG_Int
 
| colspan="2"| The tint color of the grass.
 
| Example: 8364543, which is #7FA1FF in RGB.
 
|-
 
| colspan="2"| grass_color
 
| Optional TAG_Int
 
| colspan="2"| ?
 
| Example: 8364543, which is #7FA1FF in RGB.
 
|-
 
| colspan="2"| grass_color_modifier
 
| Optional TAG_String
 
| colspan="2"| Unknown, likely affects foliage color.
 
| If set, known values are "swamp" and "dark_forest".
 
|-
 
| colspan="2"| 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).
 
|-
 
| colspan="2"| ambient_sound
 
| Optional TAG_String
 
| colspan="2"| Ambient soundtrack.
 
| If present, the ID of a soundtrack. Example: "minecraft:ambient.basalt_deltas.loop".
 
|-
 
| colspan="2"| 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).
 
|-
 
| colspan="2"| 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).
 
|-
 
| rowspan="2"| particle
 
| probability
 
| rowspan="2"| Optional TAG_Compound
 
| TAG_FLOAT
 
| rowspan="2"| Particles that appear randomly in the biome.
 
| Possibly the probability of spawning the particle.
 
| ?
 
|-
 
| options
 
| TAG_COMPOUND
 
| The properties of the particle to spawn.
 
| Contains the field "type" (TAG_String), which identifies the particle type.
 
 
  |}
 
  |}
  
Chat registry:
+
{{Need Info|What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?}}
  
{| class="wikitable"
+
Within flags:
!Name
 
!Type
 
!style="width: 250px;" colspan="2"| Notes
 
|-
 
| type
 
| TAG_String
 
| The name of the registry. Always "minecraft:chat_type".
 
|-
 
| value
 
| TAG_List
 
| List of chat type registry entries (see below).
 
|}
 
  
Chat type:
+
* 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.}}
  
{| class="wikitable"
+
{{change|Factor Data|}}
 +
{| class="wikitable" {{removed}}
 
  !Name
 
  !Name
 
  !Type
 
  !Type
 
  !style="width: 250px;" colspan="2"| Notes
 
  !style="width: 250px;" colspan="2"| Notes
 
  |-
 
  |-
  | name
+
  | padding_duration
  | TAG_String
+
  | TAG_INT
  | The type's name (eg "minecraft:chat")
+
  |
 
  |-
 
  |-
  | id
+
  | factor_start
  | TAG_Int
+
  | TAG_FLOAT
  |  
+
  |
 
  |-
 
  |-
  | elements
+
  | factor_target
  | TAG_Compound
+
  | TAG_FLOAT
  | "chat" and "narration" TAG_Compound's (see below)
+
  |
|}
 
 
 
Chat type "chat" and "narration":
 
 
 
{| class="wikitable"
 
!Name
 
!Type
 
!style="width: 250px;" colspan="2"| Notes
 
 
  |-
 
  |-
  | translation_key
+
  | factor_current
  | TAG_String
+
  | TAG_FLOAT
  |  
+
  |
 
  |-
 
  |-
  | style
+
  | effect_changed_timestamp
  | TAG_Compound
+
  | TAG_INT
| Similar to Chat JSON (only present in "chat" TAG_Compound)
 
 
  |-
 
  |-
  | parameters
+
  | factor_previous_frame
  | TAG_List of TAG_String
+
  | TAG_FLOAT
| Values can be "sender", "target" and "content"
 
|}
 
 
 
==== Resource Pack ====
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | rowspan="5"| 0x06
+
  | had_effect_last_tick
| rowspan="5"| Configuration
+
  | TAG_BOOLEAN
| rowspan="5"| Client
 
| URL
 
| String (32767)
 
| The URL to the resource pack.
 
|-
 
| Hash
 
| String (40)
 
| A 40 character hexadecimal and lowercase [[wikipedia:SHA-1|SHA-1]] hash of the resource pack file.<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
 
|-
 
| 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.
 
|-
 
| Has Prompt Message
 
| Boolean
 
| <code>true</code> If the next field will be sent <code>false</code> otherwise. When <code>false</code>, this is the end of the packet
 
|-
 
| Prompt Message
 
| Optional [[Chat]]
 
  | This is shown in the prompt making the client accept or decline the resource pack.
 
 
  |}
 
  |}
  
==== Feature Flags ====
+
=== Serverbound ===
  
Used to enable and disable features, generally experimental ones, on the client.
+
==== Chat Command ====
  
{| class="wikitable" {{added}}
+
{| class="wikitable"
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="2"| 0x07
+
  | rowspan="8"| 0x04
  | rowspan="2"| Configuration
+
| rowspan="8"| Play
  | rowspan="2"| Client
+
| rowspan="8"| Server
  | Total Features
+
| colspan="2"| Command
  | VarInt
+
| colspan="2"| {{Type|String}} (256)
  | Number of features that appear in the array below.
+
| colspan="2"| The command typed by the client.
  |-
+
|- {{removed}}
  | Feature Flags
+
| colspan="2"| Timestamp
  | Identifier Array
+
  | colspan="2"| {{Type|Long}}
  |
+
| colspan="2"| The timestamp that the command was executed.
 +
|- {{removed}}
 +
| colspan="2"| Salt
 +
| colspan="2"| {{Type|Long}}
 +
  | colspan="2"| The salt for the following argument signatures.
 +
  |- {{removed}}
 +
  | colspan="2"| Array length
 +
| colspan="2"| {{Type|VarInt}}
 +
  | colspan="2"| Number of entries in the following array. The maximum length in Notchian server is 8.
 +
  |- {{removed}}
 +
| rowspan="2"| Array of argument signatures
 +
  | Argument name
 +
  | rowspan="2"| {{Type|Array}} (8)
 +
| {{Type|String}} (16)
 +
| The name of the argument that is signed by the following signature.
 +
|- {{removed}}
 +
| Signature
 +
| {{Type|Byte Array}} (256)
 +
| The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
 +
|- {{removed}}
 +
| colspan="2"| Message Count
 +
| colspan="2"| {{Type|VarInt}}
 +
  | colspan="2"|
 +
|- {{removed}}
 +
| colspan="2"| Acknowledged
 +
| colspan="2"| {{Type|Fixed BitSet}} (20)
 +
| colspan="2"|
 
  |}
 
  |}
  
As of 23w31a, the following feature flags are available:
 
  
* minecraft:vanilla - enables vanilla features</li>
+
==== Signed Chat Command ====
* minecraft:bundle - enables support for the bundle</li>
 
* minecraft:trade_rebalance - enables support for the rebalanced villager trades</li>
 
 
 
==== Update Tags ====
 
  
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
Line 1,438: Line 1,346:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="3"| 0x08
+
  | rowspan="8"| 0x05
  | rowspan="3"| Configuration
+
  | rowspan="8"| Play
  | rowspan="3"| Client
+
  | rowspan="8"| Server
  | colspan="2"| Length of the array
+
  | colspan="2"| Command
 +
| colspan="2"| String(256)
 +
| The command typed by the client.
 +
|-
 +
| colspan="2"| Timestamp
 +
| colspan="2"| Long
 +
| The timestamp that the command was executed. Milliseconds since the Unix epoch.
 +
|-
 +
| colspan="2"| Salt
 +
| colspan="2"| Long
 +
| The salt for the following argument signatures.
 +
|-
 +
| colspan="2"| Argument Signature Count
 
  | colspan="2"| VarInt
 
  | colspan="2"| VarInt
  |
+
  | Number of elements in the following array. The maximum length in Notchian server is 8.
 
  |-
 
  |-
  | rowspan="2"| Array of tags
+
  | rowspan="2"| Argument Signatures
  | Tag type
+
  | Name
 
  | rowspan="2"| Array
 
  | rowspan="2"| Array
  | Identifier
+
  | String(16)
  | 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>)
+
  | The name of the argument that is signed by the following signature.
 
  |-
 
  |-
  | Array of Tag
+
  | Signature
  | (See below)
+
  | ByteArray(256)
  |
+
  | The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
|}
 
 
 
Tags look like:
 
 
 
{| class="wikitable"
 
! colspan="2"| Field Name
 
! colspan="2"| Field Type
 
! Notes
 
 
  |-
 
  |-
  | colspan="2"| Length
+
  | colspan="2"| Seen Messages Offset
 
  | colspan="2"| VarInt
 
  | colspan="2"| VarInt
  | Number of elements in the following array
+
  |
 
  |-
 
  |-
  | rowspan="3"| Tags
+
  | colspan="2"| Seen Messages Acknowledged
  | Tag name
+
  | colspan="2"| Fixed BitSet(20)
| rowspan="3"| Array
 
| Identifier
 
 
  |
 
  |
|-
 
| Count
 
| VarInt
 
| Number of elements in the following array
 
|-
 
| Entries
 
| Array of VarInt
 
| Numeric ID of the given type (block, item, etc.).
 
 
  |}
 
  |}
  
More information on tags is available at: https://minecraft.gamepedia.com/Tag
+
==== Cookie Response (play) ====
  
And a list of all tags is here: https://minecraft.gamepedia.com/Tag#List_of_tags
+
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.
 
 
=== Serverbound ===
 
 
 
==== Plugin Message (configuration) ====
 
 
 
{{Main|Plugin channels}}
 
 
 
Mods and plugins can use this to send their data. Minecraft itself uses some [[plugin channel]]s. These internal channels are in the <code>minecraft</code> namespace.
 
 
 
More documentation on this: [https://dinnerbone.com/blog/2012/01/13/minecraft-plugin-channels-messaging/ https://dinnerbone.com/blog/2012/01/13/minecraft-plugin-channels-messaging/]
 
 
 
Note that the length of Data is known only from the packet length, since the packet has no length field of any kind.
 
  
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
Line 1,502: Line 1,392:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="2"| 0x00
+
  | rowspan="4"| 0x11
  | rowspan="2"| Configuration
+
  | rowspan="4"| Play
  | rowspan="2"| Server
+
  | rowspan="4"| Server
  | Channel
+
  | colspan="2"| Key
| Identifier
+
  | colspan="2"| Identifier
  | Name of the [[plugin channel]] used to send the data.
+
  | The identifier of the cookie.
|-
 
| Data
 
  | Byte Array (32767)
 
| Any data, depending on the channel. <code>minecraft:</code> channels are documented [[plugin channel|here]]. The length of this array must be inferred from the packet length.
 
|}
 
 
 
In Notchian server, the maximum data length is 32767 bytes.
 
 
 
==== Finish Configuration ====
 
 
 
Sent by the client to notify the client that the configuration process has finished. It is sent in response to the server's [[#Finish_Configuration|Finish Configuration]].
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | rowspan="1"| 0x01
+
  | colspan="2"| Has Payload
| rowspan="1"| Configuration
+
  | colspan="2"| Boolean
| rowspan="1"| Server
+
  | The payload is only present if the cookie exists on the client.
  | colspan="3"| ''no fields''
 
  |}
 
 
 
This packet switches the connection state to [[#Play|play]].
 
 
 
==== Keep Alive (configuration) ====
 
 
 
The server will frequently send out a keep-alive (see [[#Keep Alive (configuration)|clientbound Keep Alive]]), each containing a random ID. The client must respond with the same packet.
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | 0x02
+
  | colspan="2"| Payload Length
| Configuration
+
  | colspan="2"| Optional VarInt
  | Server
+
  | Length of the following byte array.
| Keep Alive ID
 
| Long
 
|
 
  |}
 
 
 
==== Pong (configuration) ====
 
 
 
Response to the clientbound packet ([[#Ping (configuration)|Ping]]) with the same id.
 
 
 
{| class="wikitable" {{added}}
 
! Packet ID
 
! State
 
! Bound To
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | 0x03
+
  | colspan="2"| Payload
| Configuration
+
  | colspan="2"| Optional Byte Array (5120)
| Server
+
  | The data of the cookie, if any.
  | ID
 
| Int
 
  | id is the same as the ping packet
 
 
  |}
 
  |}
  
==== Resource Pack (configuration) ====
+
==== Debug Sample Subscription ====
  
 
{| class="wikitable" {{added}}
 
{| class="wikitable" {{added}}
Line 1,590: Line 1,426:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | 0x04
+
  | 0x13
  | Configuration
+
  | Play
 
  | Server
 
  | Server
  | Result
+
  | Sample Type
 
  | VarInt Enum
 
  | VarInt Enum
  | 0: successfully loaded, 1: declined, 2: failed download, 3: accepted.
+
  | The type of debug sample to subscribe to. Currently always 0 (TICK_TIME).
 
  |}
 
  |}
 
  
 
[[Category:Minecraft Modern]]
 
[[Category:Minecraft Modern]]

Revision as of 22:19, 9 April 2024

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

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

Contents

Data types

No changes so far.

Packets

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

New/modified data types

No changes so far.

Entity Metadata

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

Living Entity

TODO: This has changed to use the PARTICLES attribute

Wolf

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

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

Armadillo

Extends Animal.

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

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Handshake

Serverbound

Handshake

This causes the server to switch into the target state.

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

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

Encryption Request

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

Cookie Request (login)

Requests a cookie that was previously stored.

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

Serverbound

Cookie Response (login)

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

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

Configuration

Clientbound

Cookie Request (configuration)

Requests a cookie that was previously stored.

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

Reset Chat

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

Registry Data

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

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

Store Cookie (configuration)

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

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

Transfer (configuration)

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

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

Clientbound Known Packs

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

Serverbound

Cookie Response (configuration)

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

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

Serverbound Known Packs

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

Play

Clientbound

Cookie Request (play)

Requests a cookie that was previously stored.

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

Debug Sample

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

Login (play)

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

Respawn

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

In the Notchian implementation, this is context dependent:

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

Store Cookie (play)

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

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

Transfer (play)

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

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

Update Attributes

Sets attributes on the given entity.

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

Known Key values (see also Attribute#Modifiers):

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

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

Modifier Data structure:

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

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

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

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

Entity Effect

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

Within flags:

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

Factor Data

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

Serverbound

Chat Command

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


Signed Chat Command

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

Cookie Response (play)

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

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

Debug Sample Subscription

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