Difference between revisions of "Pre-release protocol"

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(1.20-pre1)
(→‎Entity Metadata: Merge changes from stable docs to incorporate new metadata type templates. Fix my earlier mistake on Pose in the process.)
(65 intermediate revisions by 5 users not shown)
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This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.19.4, protocol 762]]) to the current pre-release (currently [[Protocol version numbers|1.20-pre1, protocol {{Snapshot PVN|1073741958}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
+
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.4, protocol 765]]) to the current pre-release (currently [[Protocol version numbers|24w03b, protocol {{Snapshot PVN|1073741996}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
  
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
Line 18: Line 18:
 
  !colspan="2"| Documentation
 
  !colspan="2"| Documentation
 
  |-
 
  |-
!colspan="4"| Play clientbound
+
!colspan="4"| Handshake serverbound
{{PacketList|0x24|Chunk Data and Update Light}}
+
{{PacketList|0x00|Handshake}}
{{PacketList|0x27|Update Light}}
+
|-
{{PacketList|0x28|Login (play)}}
+
!colspan="4"| Login clientbound
{{PacketList|0x31|Open Sign Editor}}
+
{{PacketList|0x05|Cookie Request (login)|rel=added}}
{{PacketList|0x41|Respawn}}
+
|-
{{PacketList|0x43|Update Section Blocks}}
+
!colspan="4"| Login serverbound
{{PacketList|0x69|Update Advancements}}
+
{{PacketList|0x04|Cookie Response (login)|rel=added}}
{{PacketList|0x6B|Feature Flags}}
+
|-
{{PacketList|0x6D|Update Recipes}}
+
!colspan="4"| Configuration clientbound
|-
+
{{PacketList|0x00|Cookie Request (configuration)|rel=added}}
!colspan="4"| Play serverbound
+
{{PacketList|{{change|0x00|0x01}}|Clientbound Plugin Message (configuration)|pre=unchanged}}
{{PacketList|0x2E|Update Sign}}
+
{{PacketList|{{change|0x01|0x02}}|Disconnect (configuration)|pre=unchanged}}
|}
+
{{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x03|0x04}}|Clientbound Keep Alive (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x04|0x05}}|Ping (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x05|0x06}}|Registry Data|pre=unchanged}}
 +
{{PacketList|{{change|0x06|0x07}}|Remove Resource Pack (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x07|0x08}}|Add Resource Pack (configuration)|pre=unchanged}}
 +
{{PacketList|0x09|Store Cookie (configuration)|rel=added}}
 +
{{PacketList|0x0A|Transfer (configuration)|rel=added}}
 +
{{PacketList|{{change|0x08|0x0B}}|Feature Flags|pre=unchanged}}
 +
{{PacketList|{{change|0x09|0x0C}}|Update Tags (configuration)|pre=unchanged}}
 +
 
 +
|-
 +
!colspan="4"| Configuration serverbound
 +
{{PacketList|0x01|Cookie Response (configuration)|rel=added}}
 +
{{PacketList|{{change|0x01|0x02}}|Serverbound Plugin Message (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x03|0x04}}|Serverbound Keep Alive (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x04|0x05}}|Pong (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x05|0x06}}|Resource Pack Response (configuration)|pre=unchanged}}
 +
|-
 +
!colspan="4"| Play clientbound
 +
{{PacketList|0x16|Cookie Request (Play)|rel=added}}
 +
{{PacketList|{{change|0x16|0x17}}|Set Cooldown|pre=unchanged}}
 +
{{PacketList|{{change|0x17|0x18}}|Chat Suggestions|pre=unchanged}}
 +
{{PacketList|{{change|0x18|0x19}}|Clientbound Plugin Message (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x19|0x1A}}|Damage Event|pre=unchanged}}
 +
{{PacketList|{{change|0x1A|0x1B}}|Delete Message|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x1C}}|Disconnect (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1D}}|Disguised Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x1D|0x1E}}|Entity Event|pre=unchanged}}
 +
{{PacketList|{{change|0x1E|0x1F}}|Explosion|pre=unchanged}}
 +
{{PacketList|{{change|0x1F|0x20}}|Unload Chunk|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x21}}|Game Event|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x22}}|Open Horse Screen|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x23}}|Hurt Animation|pre=unchanged}}
 +
{{PacketList|{{change|0x23|0x24}}|Initialize World Border|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x25}}|Clientbound Keep Alive (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x26}}|Chunk Data and Update Light|pre=unchanged}}
 +
{{PacketList|{{change|0x26|0x27}}|World Event|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x28}}|Particle|pre=unchanged}}
 +
{{PacketList|{{change|0x28|0x29}}|Update Light|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2A}}|Login (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x2A|0x2B}}|Map Data|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2C}}|Merchant Offers|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2D}}|Update Entity Position|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x2E}}|Update Entity Position and Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2E|0x2F}}|Update Entity Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2F|0x30}}|Move Vehicle|pre=unchanged}}
 +
{{PacketList|{{change|0x30|0x31}}|Open Book|pre=unchanged}}
 +
{{PacketList|{{change|0x31|0x32}}|Open Screen|pre=unchanged}}
 +
{{PacketList|{{change|0x32|0x33}}|Open Sign Editor|pre=unchanged}}
 +
{{PacketList|{{change|0x33|0x34}}|Ping (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x34|0x35}}|Ping Response (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x35|0x36}}|Place Ghost Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x36|0x37}}|Player Abilities|pre=unchanged}}
 +
{{PacketList|{{change|0x37|0x38}}|Player Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x38|0x39}}|End Combat|pre=unchanged}}
 +
{{PacketList|{{change|0x39|0x3A}}|Enter Combat|pre=unchanged}}
 +
{{PacketList|{{change|0x3A|0x3B}}|Combat Death|pre=unchanged}}
 +
{{PacketList|{{change|0x3B|0x3C}}|Player Info Remove|pre=unchanged}}
 +
{{PacketList|{{change|0x3C|0x3D}}|Player Info Update|pre=unchanged}}
 +
{{PacketList|{{change|0x3D|0x3E}}|Look At|pre=unchanged}}
 +
{{PacketList|{{change|0x3E|0x3F}}|Synchronize Player Position|pre=unchanged}}
 +
{{PacketList|{{change|0x3F|0x40}}|Update Recipe Book|pre=unchanged}}
 +
{{PacketList|{{change|0x40|0x41}}|Remove Entities|pre=unchanged}}
 +
{{PacketList|{{change|0x41|0x42}}|Remove Entity Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x42|0x43}}|Reset Score|pre=unchanged}}
 +
{{PacketList|{{change|0x43|0x44}}|Remove Resource Pack (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x44|0x45}}|Add Resource Pack (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x45|0x46}}|Respawn|pre=unchanged}}
 +
{{PacketList|{{change|0x46|0x47}}|Set Head Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x47|0x48}}|Update Section Blocks|pre=unchanged}}
 +
{{PacketList|{{change|0x48|0x49}}|Select Advancements Tab|pre=unchanged}}
 +
{{PacketList|{{change|0x49|0x4A}}|Server Data|pre=unchanged}}
 +
{{PacketList|{{change|0x4A|0x4B}}|Set Action Bar Text|pre=unchanged}}
 +
{{PacketList|{{change|0x4B|0x4C}}|Set Border Center|pre=unchanged}}
 +
{{PacketList|{{change|0x4C|0x4D}}|Set Border Lerp Size|pre=unchanged}}
 +
{{PacketList|{{change|0x4D|0x4E}}|Set Border Size|pre=unchanged}}
 +
{{PacketList|{{change|0x4E|0x4F}}|Set Border Warning Delay|pre=unchanged}}
 +
{{PacketList|{{change|0x4F|0x50}}|Set Border Warning Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x50|0x51}}|Set Camera|pre=unchanged}}
 +
{{PacketList|{{change|0x51|0x52}}|Set Held Item|pre=unchanged}}
 +
{{PacketList|{{change|0x52|0x53}}|Set Center Chunk|pre=unchanged}}
 +
{{PacketList|{{change|0x53|0x54}}|Set Render Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x54|0x55}}|Set Default Spawn Position|pre=unchanged}}
 +
{{PacketList|{{change|0x55|0x56}}|Display Objective|pre=unchanged}}
 +
{{PacketList|{{change|0x56|0x57}}|Set Entity Metadata|pre=unchanged}}
 +
{{PacketList|{{change|0x57|0x58}}|Link Entities|pre=unchanged}}
 +
{{PacketList|{{change|0x58|0x59}}|Set Entity Velocity|pre=unchanged}}
 +
{{PacketList|{{change|0x59|0x5A}}|Set Equipment|pre=unchanged}}
 +
{{PacketList|{{change|0x5A|0x5B}}|Set Experience|pre=unchanged}}
 +
{{PacketList|{{change|0x5B|0x5C}}|Set Health|pre=unchanged}}
 +
{{PacketList|{{change|0x5C|0x5D}}|Update Objectives|pre=unchanged}}
 +
{{PacketList|{{change|0x5D|0x5E}}|Set Passengers|pre=unchanged}}
 +
{{PacketList|{{change|0x5E|0x5F}}|Update Teams|pre=unchanged}}
 +
{{PacketList|{{change|0x5F|0x60}}|Update Score|pre=unchanged}}
 +
{{PacketList|{{change|0x60|0x61}}|Set Simulation Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x61|0x62}}|Set Subtitle Text|pre=unchanged}}
 +
{{PacketList|{{change|0x62|0x63}}|Update Time|pre=unchanged}}
 +
{{PacketList|{{change|0x63|0x64}}|Set Title Text|pre=unchanged}}
 +
{{PacketList|{{change|0x64|0x65}}|Set Title Animation Times|pre=unchanged}}
 +
{{PacketList|{{change|0x65|0x66}}|Entity Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x66|0x67}}|Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x67|0x68}}|Start Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x68|0x69}}|Stop Sound|pre=unchanged}}
 +
{{PacketList|0x6A|Store Cookie (Play)|rel=added}}
 +
{{PacketList|{{change|0x69|0x6B}}|System Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x6A|0x6C}}|Set Tab List Header And Footer|pre=unchanged}}
 +
{{PacketList|{{change|0x6B|0x6D}}|Tag Query Response|pre=unchanged}}
 +
{{PacketList|{{change|0x6C|0x6E}}|Pickup Item|pre=unchanged}}
 +
{{PacketList|{{change|0x6D|0x6F}}|Teleport Entity|pre=unchanged}}
 +
{{PacketList|{{change|0x6E|0x70}}|Set Ticking State|pre=unchanged}}
 +
{{PacketList|{{change|0x6F|0x71}}|Step Tick|pre=unchanged}}
 +
{{PacketList|0x72|Transfer (Play)|rel=added}}
 +
{{PacketList|{{change|0x70|0x73}}|Update Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x71|0x74}}|Update Attributes}}
 +
{{PacketList|{{change|0x72|0x75}}|Entity Effect}}
 +
{{PacketList|{{change|0x73|0x76}}|Update Recipes|pre=unchanged}}
 +
{{PacketList|{{change|0x74|0x77}}|Update Tags (play)|pre=unchanged}}
 +
|-
 +
!colspan="4"| Play serverbound
 +
{{PacketList|0x10|Cookie Response (play)|rel=added}}
 +
{{PacketList|{{change|0x10|0x11}}|Serverbound Plugin Message (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x11|0x12}}|Edit Book|pre=unchanged}}
 +
{{PacketList|{{change|0x12|0x13}}|Query Entity Tag|pre=unchanged}}
 +
{{PacketList|{{change|0x13|0x14}}|Interact|pre=unchanged}}
 +
{{PacketList|{{change|0x14|0x15}}|Jigsaw Generate|pre=unchanged}}
 +
{{PacketList|{{change|0x15|0x16}}|Serverbound Keep Alive (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x16|0x17}}|Lock Difficulty|pre=unchanged}}
 +
{{PacketList|{{change|0x17|0x18}}|Set Player Position|pre=unchanged}}
 +
{{PacketList|{{change|0x18|0x19}}|Set Player Position and Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x19|0x1A}}|Set Player Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x1A|0x1B}}|Set Player On Ground|pre=unchanged}}
 +
{{PacketList|{{change|0x1B|0x1C}}|Move Vehicle|pre=unchanged}}
 +
{{PacketList|{{change|0x1C|0x1D}}|Paddle Boat|pre=unchanged}}
 +
{{PacketList|{{change|0x1D|0x1E}}|Pick Item|pre=unchanged}}
 +
{{PacketList|{{change|0x1E|0x1F}}|Ping Request (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x1F|0x20}}|Place Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x21}}|Player Abilities|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x22}}|Player Action|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x23}}|Player Command|pre=unchanged}}
 +
{{PacketList|{{change|0x23|0x24}}|Player Input|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x25}}|Pong (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x26}}|Change Recipe Book Settings|pre=unchanged}}
 +
{{PacketList|{{change|0x26|0x27}}|Set Seen Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x28}}|Rename Item|pre=unchanged}}
 +
{{PacketList|{{change|0x28|0x29}}|Resource Pack Response (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2A}}|Seen Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x2A|0x2B}}|Select Trade|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2C}}|Set Beacon Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2D}}|Set Held Item|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x2E}}|Program Command Block|pre=unchanged}}
 +
{{PacketList|{{change|0x2E|0x2F}}|Program Command Block Minecart|pre=unchanged}}
 +
{{PacketList|{{change|0x2F|0x30}}|Set Creative Mode Slot|pre=unchanged}}
 +
{{PacketList|{{change|0x30|0x31}}|Program Jigsaw Block|pre=unchanged}}
 +
{{PacketList|{{change|0x31|0x32}}|Program Structure Block|pre=unchanged}}
 +
{{PacketList|{{change|0x32|0x33}}|Update Sign|pre=unchanged}}
 +
{{PacketList|{{change|0x33|0x34}}|Swing Arm|pre=unchanged}}
 +
{{PacketList|{{change|0x34|0x35}}|Teleport To Entity|pre=unchanged}}
 +
{{PacketList|{{change|0x35|0x36}}|Use Item On|pre=unchanged}}
 +
{{PacketList|{{change|0x36|0x37}}|Use Item|pre=unchanged}}
 +
|}
  
 
== New/modified data types ==
 
== New/modified data types ==
Line 39: Line 200:
 
== Entity Metadata ==
 
== Entity Metadata ==
  
No changes so far.
+
{{#vardefine: meta_prerelease | 1}}
 +
 
 +
{{Metadata type definition/begin}}
 +
! Value
 +
! Notes
 +
{{Metadata type definition|Byte}}
 +
| {{Type|Byte}}
 +
|
 +
{{Metadata type definition|VarInt}}
 +
| {{Type|VarInt}}
 +
|
 +
{{Metadata type definition|VarLong}}
 +
| {{Type|VarLong}}
 +
|
 +
{{Metadata type definition|Float}}
 +
| {{Type|Float}}
 +
|
 +
{{Metadata type definition|String}}
 +
| {{Type|String}}
 +
|
 +
{{Metadata type definition|Text Component}}
 +
| {{Type|Text Component}}
 +
|
 +
{{Metadata type definition|Optional Text Component}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|Text Component}})
 +
| Text Component is present if the Boolean is set to true.
 +
{{Metadata type definition|Slot}}
 +
| {{Type|Slot}}
 +
|
 +
{{Metadata type definition|Boolean}}
 +
| {{Type|Boolean}}
 +
|
 +
{{Metadata type definition|Rotations}}
 +
| ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 +
| rotation on x, rotation on y, rotation on z
 +
{{Metadata type definition|Position}}
 +
| {{Type|Position}}
 +
|
 +
{{Metadata type definition|Optional Position}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|Position}})
 +
| Position is present if the Boolean is set to true.
 +
{{Metadata type definition|Direction}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5
 +
{{Metadata type definition|Optional UUID}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|UUID}})
 +
| UUID is present if the Boolean is set to true.
 +
{{Metadata type definition|Block State}}
 +
| {{Type|VarInt}}
 +
| An ID in the block state registry.
 +
{{Metadata type definition|Optional Block State}}
 +
| {{Type|VarInt}}
 +
| 0 for absent (air is unrepresentable); otherwise, an ID in the block state registry.
 +
{{Metadata type definition|NBT}}
 +
| {{Type|NBT}}
 +
|
 +
{{Metadata type definition|Particle}}
 +
| ({{Type|VarInt}}, Varies)
 +
| particle type (an ID in the <code>minecraft:particle_type</code> registry), particle data (See [[Particles]].)
 +
{{Metadata type definition|Villager Data}}
 +
| ({{Type|VarInt}}, {{Type|VarInt}}, {{Type|VarInt}})
 +
| villager type, villager profession, level (See below.)
 +
{{Metadata type definition|Optional VarInt}}
 +
| {{Type|VarInt}}
 +
| 0 for absent; 1 + actual value otherwise. Used for entity IDs.
 +
{{Metadata type definition|Pose}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| STANDING = 0, FALL_FLYING = 1, SLEEPING = 2, SWIMMING = 3, SPIN_ATTACK = 4, SNEAKING = 5, LONG_JUMPING = 6, DYING = 7, CROAKING = 8, USING_TONGUE = 9, SITTING = 10, ROARING = 11, SNIFFING = 12, EMERGING = 13, DIGGING = 14{{change||2=, SLIDING = 15, SHOOTING = 16, INHALING = 17}}
 +
{{Metadata type definition|Cat Variant}}
 +
| {{Type|VarInt}}
 +
| An ID in the <code>minecraft:cat_variant</code> registry.
 +
{{Metadata type definition|Frog Variant}}
 +
| {{Type|VarInt}}
 +
| An ID in the <code>minecraft:frog_variant</code> registry.
 +
{{Metadata type definition|Optional Global Position}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|Identifier}}, {{Type|Optional}} {{Type|Position}})
 +
| dimension identifier, position; only if the Boolean is set to true.
 +
{{Metadata type definition|Painting Variant}}
 +
| {{Type|VarInt}}
 +
| An ID in the <code>minecraft:painting_variant</code> registry.
 +
{{Metadata type definition|Sniffer State}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
 +
{{Metadata type definition|Armadillo State|rel=added}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| IDLE = 0, ROLLING = 1, SCARED = 2
 +
{{Metadata type definition|Vector3}}
 +
| ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 +
| x, y, z
 +
{{Metadata type definition|Quaternion}}
 +
| ({{Type|Float}}, {{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 +
| x, y, z, w
 +
|}
  
=== Entity ===
+
=== Armadillo ===
  
No changes so far.
+
{{Metadata inherit|Armadillo|inherits=Animal|start_at=17}}
 +
{| class="wikitable" {{added}}
 +
! Index
 +
! Type
 +
!style="width: 250px;" colspan="2"| Meaning
 +
! Default
 +
|-
 +
| {{Metadata id|added}}
 +
| {{Metadata type|Armadillo State}}
 +
|colspan="2"| Armadillo State
 +
| IDLE
 +
|}
  
 
== Block Actions ==
 
== Block Actions ==
Line 51: Line 315:
 
== Inventories ==
 
== Inventories ==
  
{| class="wikitable"
+
No changes so far.
|-
 
! Type
 
! Name
 
! Description
 
|-
 
| 0
 
| minecraft:generic_9x1
 
| A 1-row inventory, not used by the notchian server.
 
|-
 
| 1
 
| minecraft:generic_9x2
 
| A 2-row inventory, not used by the notchian server.
 
|-
 
| 2
 
| minecraft:generic_9x3
 
| General-purpose 3-row inventory.  Used by {{Minecraft Wiki|Chest}}, {{Minecraft Wiki|minecart with chest}}, {{Minecraft Wiki|ender chest}}, and {{Minecraft Wiki|barrel}}
 
|-
 
| 3
 
| minecraft:generic_9x4
 
| A 4-row inventory, not used by the notchian server.
 
|-
 
| 4
 
| minecraft:generic_9x5
 
| A 5-row inventory, not used by the notchian server.
 
|-
 
| 5
 
| minecraft:generic_9x6
 
| General-purpose 6-row inventory, used by large chests.
 
|-
 
| 6
 
| minecraft:generic_3x3
 
| General-purpose 3-by-3 square inventory, used by {{Minecraft Wiki|Dispenser}} and {{Minecraft Wiki|Dropper}}
 
|-
 
| 7
 
| minecraft:anvil
 
| {{Minecraft Wiki|Anvil}}
 
|-
 
| 8
 
| minecraft:beacon
 
| {{Minecraft Wiki|Beacon}}
 
|-
 
| 9
 
| minecraft:blast_furnace
 
| {{Minecraft Wiki|Blast Furnace}}
 
|-
 
| 10
 
| minecraft:brewing_stand
 
| {{Minecraft Wiki|Brewing stand}}
 
|-
 
| 11
 
| minecraft:crafting
 
| {{Minecraft Wiki|Crafting table}}
 
|-
 
| 12
 
| minecraft:enchantment
 
| {{Minecraft Wiki|Enchantment table}}
 
|-
 
| 13
 
| minecraft:furnace
 
| {{Minecraft Wiki|Furnace}}
 
|-
 
| 14
 
| minecraft:grindstone
 
| {{Minecraft Wiki|Grindstone}}
 
|-
 
| 15
 
| minecraft:hopper
 
| {{Minecraft Wiki|Hopper}} or {{Minecraft Wiki|minecart with hopper}}
 
|-
 
| 16
 
| minecraft:lectern
 
| {{Minecraft Wiki|Lectern}}
 
|-
 
| 17
 
| minecraft:loom
 
| {{Minecraft Wiki|Loom}}
 
|-
 
| 18
 
| minecraft:merchant
 
| {{Minecraft Wiki|Villager}}, {{Minecraft Wiki|Wandering Trader}}
 
|-
 
| 19
 
| minecraft:shulker_box
 
| {{Minecraft Wiki|Shulker box}}
 
|- {{removed}}
 
| 20
 
| minecraft:legacy_smithing
 
| {{Minecraft Wiki|Smithing Table}}
 
{{Warning|The Notchian server only sends this type if [[Protocol#Feature_Flags|feature flag]] '''update_1_20''' was '''not''' enabled}}
 
|-
 
| {{change|21|20}}
 
| minecraft:smithing
 
| {{Minecraft Wiki|Smithing Table}}
 
{{change|{{Warning|The Notchian server only sends this type if [[Protocol#Feature_Flags|feature flag]] '''update_1_20''' was enabled}}|}}
 
|-
 
| {{change|22|21}}
 
| minecraft:smoker
 
| {{Minecraft Wiki|Smoker}}
 
|-
 
| {{change|23|22}}
 
| minecraft:cartography
 
| {{Minecraft Wiki|Cartography Table}}
 
|-
 
| {{change|24|23}}
 
| minecraft:stonecutter
 
| {{Minecraft Wiki|Stonecutter}}
 
|}
 
  
 
== Plugin Channels ==
 
== Plugin Channels ==
Line 164: Line 321:
 
No changes so far.
 
No changes so far.
  
== Play ==
+
== Handshake ==
  
=== Clientbound ===
+
=== Serverbound ===
  
==== Chunk Data and Update Light ====
+
==== Handshake ====
{{Main|Chunk Format}}
 
{{See also|#Unload Chunk}}
 
  
{{Need Info|How do biomes work now?  The biome change happened at the same time as the seed change, but it's not clear how/if biomes could be computed given that it's not the actual seed...  ([https://www.reddit.com/r/Mojira/comments/e5at6i/a_discussion_for_the_changes_to_how_biomes_are/ /r/mojira discussion] which notes that it seems to be some kind of interpolation)}}
+
This causes the server to switch into the target state.
 
 
This packet sends all block entities in the chunk (though sending them is not required; it is still legal to send them with [[#Block Entity Data|Block Entity Data]] later). The light data in this packet is the same format as in the [[#Update Light|Update Light]] packet.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 180: Line 333:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! colspan="2"| Field Name
+
  ! Field Name
  ! colspan="2"| Field Type
+
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="21"| 0x24
+
  | rowspan="4"| 0x00
  | rowspan="21"| Play
+
  | rowspan="4"| Handshaking
  | rowspan="21"| Client
+
  | rowspan="4"| Server
| colspan="2"| Chunk X
+
  | Protocol Version
| colspan="2"| Int
+
  | [[#Definitions:varint|VarInt]]
| Chunk coordinate (block coordinate divided by 16, rounded down)
+
  | See [[protocol version numbers]] (currently 765 in Minecraft 1.20.4).
|-
 
| colspan="2"| Chunk Z
 
| colspan="2"| Int
 
  | Chunk coordinate (block coordinate divided by 16, rounded down)
 
  |-
 
| colspan="2"| Heightmaps
 
| colspan="2"| [[NBT]]
 
| Compound containing one long array named <code>MOTION_BLOCKING</code>, which is a heightmap for the highest solid block at each position in the chunk (as a compacted long array with 256 entries, with the number of bits per entry varying depending on the world's height, defined by the formula <code>ceil(log2(height + 1))</code>). The Notchian server also adds a <code>WORLD_SURFACE</code> long array, the purpose of which is unknown, but it's not required for the chunk to be accepted.
 
|-
 
| colspan="2"| Size
 
| colspan="2"| VarInt
 
| Size of Data in bytes
 
|-
 
| colspan="2"| Data
 
| colspan="2"| Byte array
 
  | See [[Chunk Format#Data structure|data structure]] in Chunk Format
 
|-
 
| colspan="2"| Number of block entities
 
| colspan="2"| VarInt
 
| Number of elements in the following array
 
|-
 
| rowspan="4"| Block Entity
 
| Packed XZ
 
| rowspan="4"| Array
 
| Byte
 
| The packed section coordinates, calculated from <code><nowiki>((blockX & 15) << 4) | (blockZ & 15)</nowiki></code>
 
|-
 
| Y
 
| Short
 
| The height relative to the world
 
|-
 
| Type
 
| VarInt
 
| The type of block entity
 
|-
 
| Data
 
| [[NBT]]
 
| The block entity's data, without the X, Y, and Z values
 
|- {{removed}}
 
| colspan="2"| Trust Edges
 
| colspan="2"| Boolean
 
| If edges should be trusted for light updates.
 
|-
 
| colspan="2"| Sky Light Mask
 
| colspan="2"| BitSet
 
| BitSet containing bits for each section in the world + 2. Each set bit indicates that the corresponding 16×16×16 chunk section has data in the Sky Light array below. The least significant bit is for blocks 16 blocks to 1 block below the min world height (one section below the world), while the most significant bit covers blocks 1 to 16 blocks above the max world height (one section above the world).
 
|-
 
| colspan="2"| Block Light Mask
 
| colspan="2"| BitSet
 
| BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has data in the Block Light array below.  The order of bits is the same as in Sky Light Mask.
 
|-
 
| colspan="2"| Empty Sky Light Mask
 
| colspan="2"| BitSet
 
| BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has all zeros for its Sky Light data.  The order of bits is the same as in Sky Light Mask.
 
|-
 
| colspan="2"| Empty Block Light Mask
 
| colspan="2"| BitSet
 
| BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has all zeros for its Block Light data.  The order of bits is the same as in Sky Light Mask.
 
 
  |-
 
  |-
  | colspan="2"| Sky Light array count
+
  | Server Address
  | colspan="2"| VarInt
+
  | [[#Definitions:string|String]] (255)
  | Number of entries in the following array; should match the number of bits set in Sky Light Mask
+
  | 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.
 
  |-
 
  |-
  | rowspan="2"| Sky Light arrays
+
  | Server Port
| Length
+
  | [[#Definitions:unsigned-short|Unsigned Short]]
  | rowspan="2"| Array
+
  | Default is 25565. The Notchian server does not use this information.
| VarInt
 
  | Length of the following array in bytes (always 2048)
 
 
  |-
 
  |-
  | Sky Light array
+
  | Next State
  | Array of 2048 bytes
+
  | [[#Definitions:varint|VarInt]] [[#Definitions:enum|Enum]]
  | There is 1 array for each bit set to true in the sky light mask, starting with the lowest value.  Half a byte per light value. Indexed <code><nowiki>((y<<8) | (z<<4) | x) / 2 </nowiki></code> If there's a remainder, masked 0xF0 else 0x0F.
+
  | 1 for [[#Status|Status]], 2 for [[#Login|Login]]{{change||, 3 for [[#Login|Transfer]]}}.
|-
 
| colspan="2"| Block Light array count
 
| colspan="2"| VarInt
 
| Number of entries in the following array; should match the number of bits set in Block Light Mask
 
|-
 
| rowspan="2"| Block Light arrays
 
| Length
 
| rowspan="2"| Array
 
| VarInt
 
| Length of the following array in bytes (always 2048)
 
|-
 
| Block Light array
 
| Array of 2048 bytes
 
| There is 1 array for each bit set to true in the block light mask, starting with the lowest value.  Half a byte per light value. Indexed <code><nowiki>((y<<8) | (z<<4) | x) / 2 </nowiki></code> If there's a remainder, masked 0xF0 else 0x0F.
 
 
  |}
 
  |}
  
Note that the Notchian client requires an [[#Set Center Chunk|Set Center Chunk]] packet when it crosses a chunk border, otherwise it'll only display render distance + 2 chunks around the chunk it spawned in.
+
== Status ==
  
The compacted array format has been adjusted so that individual entries no longer span across multiple longs, affecting the main data array and heightmaps.
+
=== Clientbound ===
  
New format, 5 bits per block, containing the following references to blocks in a palette (not shown): <span style="border: solid 2px hsl(0, 90%, 60%)">1</span><span style="border: solid 2px hsl(30, 90%, 60%)">2</span><span style="border: solid 2px hsl(60, 90%, 60%)">2</span><span style="border: solid 2px hsl(90, 90%, 60%)">3</span><span style="border: solid 2px hsl(120, 90%, 60%)">4</span><span style="border: solid 2px hsl(150, 90%, 60%)">4</span><span style="border: solid 2px hsl(180, 90%, 60%)">5</span><span style="border: solid 2px hsl(210, 90%, 60%)">6</span><span style="border: solid 2px hsl(240, 90%, 60%)">6</span><span style="border: solid 2px hsl(270, 90%, 60%)">4</span><span style="border: solid 2px hsl(300, 90%, 60%)">8</span><span style="border: solid 2px hsl(330, 90%, 60%)">0</span><span style="border: solid 2px hsl(0, 90%, 30%)">7</span><span style="border: solid 2px hsl(30, 90%, 30%)">4</span><span style="border: solid 2px hsl(60, 90%, 30%)">3</span><span style="border: solid 2px hsl(90, 90%, 30%)">13</span><span style="border: solid 2px hsl(120, 90%, 30%)">15</span><span style="border: solid 2px hsl(150, 90%, 30%)">16</span><span style="border: solid 2px hsl(180, 90%, 30%)">9</span><span style="border: solid 2px hsl(210, 90%, 30%)">14</span><span style="border: solid 2px hsl(240, 90%, 30%)">10</span><span style="border: solid 2px hsl(270, 90%, 30%)">12</span><span style="border: solid 2px hsl(300, 90%, 30%)">0</span><span style="border: solid 2px hsl(330, 90%, 30%)">2</span>
+
No changes so far.
 +
 
 +
=== Serverbound ===
 +
 
 +
No changes so far.
 +
 
 +
== Login ==
  
<code>0020863148418841</code> <code><span style="outline: dashed 2px black">0000</span><span style="outline: solid 2px hsl(330, 90%, 60%)">00000</span><span style="outline: solid 2px hsl(300, 90%, 60%)">01000</span><span style="outline: solid 2px hsl(270, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(240, 90%, 60%)">00110</span><span style="outline: solid 2px hsl(210, 90%, 60%)">00110</span><span style="outline: solid 2px hsl(180, 90%, 60%)">00101</span><span style="outline: solid 2px hsl(150, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(120, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(90, 90%, 60%)">00011</span><span style="outline: solid 2px hsl(60, 90%, 60%)">00010</span><span style="outline: solid 2px hsl(30, 90%, 60%)">00010</span><span style="outline: solid 2px hsl(0, 90%, 60%)">00001</span></code><br>
+
=== Clientbound ===
<code>01018A7260F68C87</code> <code><span style="outline: dashed 2px black">0000</span><span style="outline: solid 2px hsl(330, 90%, 30%)">00010</span><span style="outline: solid 2px hsl(300, 90%, 30%)">00000</span><span style="outline: solid 2px hsl(270, 90%, 30%)">01100</span><span style="outline: solid 2px hsl(240, 90%, 30%)">01010</span><span style="outline: solid 2px hsl(210, 90%, 30%)">01110</span><span style="outline: solid 2px hsl(180, 90%, 30%)">01001</span><span style="outline: solid 2px hsl(150, 90%, 30%)">10000</span><span style="outline: solid 2px hsl(120, 90%, 30%)">01111</span><span style="outline: solid 2px hsl(90, 90%, 30%)">01101</span><span style="outline: solid 2px hsl(60, 90%, 30%)">00011</span><span style="outline: solid 2px hsl(30, 90%, 30%)">00100</span><span style="outline: solid 2px hsl(0, 90%, 30%)">00111</span></code>
 
  
==== Update Light ====
+
==== Cookie Request (login) ====
  
Updates light levels for a chunk.  See {{Minecraft Wiki|Light}} for information on how lighting works in Minecraft.
+
Requests a cookie that was previously stored.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 299: Line 383:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="13"| 0x27
+
  | rowspan="1"| 0x05
  | rowspan="13"| Play
+
  | rowspan="1"| Login
  | rowspan="13"| Client
+
  | rowspan="1"| Client
  | colspan="2"| Chunk X
+
  | colspan="2"| Key
| colspan="2"| VarInt
+
  | colspan="2"| Identifier
| Chunk coordinate (block coordinate divided by 16, rounded down)
+
  | The identifier of the cookie.
|-
 
  | colspan="2"| Chunk Z
 
  | colspan="2"| VarInt
 
| Chunk coordinate (block coordinate divided by 16, rounded down)
 
|- {{removed}}
 
| colspan="2"| Trust Edges
 
| colspan="2"| Boolean
 
| If edges should be trusted for light updates.
 
|-
 
| colspan="2"| Sky Light Mask
 
| colspan="2"| BitSet
 
| BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has data in the Sky Light array below.  The least significant bit is for blocks 16 blocks to 1 block below the min world height (one section below the world), while the most significant bit covers blocks 1 to 16 blocks above the max world height (one section above the world).
 
|-
 
| colspan="2"| Block Light Mask
 
| colspan="2"| BitSet
 
| BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has data in the Block Light array below.  The order of bits is the same as in Sky Light Mask.
 
|-
 
| colspan="2"| Empty Sky Light Mask
 
| colspan="2"| BitSet
 
| BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has all zeros for its Sky Light data.  The order of bits is the same as in Sky Light Mask.
 
|-
 
| colspan="2"| Empty Block Light Mask
 
| colspan="2"| BitSet
 
| BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has all zeros for its Block Light data.  The order of bits is the same as in Sky Light Mask.
 
|-
 
| colspan="2"| Sky Light array count
 
| colspan="2"| VarInt
 
| Number of entries in the following array; should match the number of bits set in Sky Light Mask
 
|-
 
| rowspan="2"| Sky Light arrays
 
| Length
 
| rowspan="2"| Array
 
| VarInt
 
| Length of the following array in bytes (always 2048)
 
|-
 
| Sky Light array
 
| Array of 2048 bytes
 
| There is 1 array for each bit set to true in the sky light mask, starting with the lowest value.  Half a byte per light value.
 
|-
 
| colspan="2"| Block Light array count
 
| colspan="2"| VarInt
 
| Number of entries in the following array; should match the number of bits set in Block Light Mask
 
|-
 
| rowspan="2"| Block Light arrays
 
| Length
 
| rowspan="2"| Array
 
| VarInt
 
| Length of the following array in bytes (always 2048)
 
|-
 
| Block Light array
 
| Array of 2048 bytes
 
| There is 1 array for each bit set to true in the block light mask, starting with the lowest value.  Half a byte per light value.
 
 
  |}
 
  |}
  
A bit will never be set in both the block light mask and the empty block light mask, though it may be present in neither of them (if the block light does not need to be updated for the corresponding chunk section).  The same applies to the sky light mask and the empty sky light mask.
+
=== Serverbound ===
  
==== Login (play) ====
+
==== Cookie Response (login) ====
  
See [[Protocol Encryption]] for information on logging in.
+
Response to a [[#Cookie_Request_(login)|Cookie Request (login)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="21"| 0x28
+
  | rowspan="3"| 0x04
  | rowspan="21"| Play
+
  | rowspan="3"| Login
  | rowspan="21"| Client
+
  | rowspan="3"| Server
  | Entity ID
+
  | colspan="2"| Key
  | Int
+
  | colspan="2"| Identifier
  | The player's Entity ID (EID).
+
  | The identifier of the cookie.
 
  |-
 
  |-
  | Is hardcore
+
  | colspan="2"| Has Payload
  | Boolean
+
  | colspan="2"| Boolean
  |
+
  | The payload is only present if the cookie exists on the client.
 
  |-
 
  |-
  | Gamemode
+
  | colspan="2"| Payload
| Unsigned Byte
+
  | colspan="2"| Optional ByteArray(5120)
| 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
+
  | The data of the cookie, if any.
|-
 
  | Previous Gamemode
 
| Byte
 
| -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous gamemode. Vanilla client uses this for the debug (F3 + N & F3 + F4) gamemode switch. (More information needed)
 
|-
 
| Dimension Count
 
| VarInt
 
| Size of the following array.
 
|-
 
| Dimension Names
 
| Array of Identifier
 
| Identifiers for all dimensions on the server.
 
|-
 
| Registry Codec
 
| [[NBT|NBT Tag Compound]]
 
| Represents certain registries that are sent from the server and are applied on the client.
 
|-
 
| Dimension Type
 
| Identifier
 
| Name of the dimension type being spawned into.
 
|-
 
| 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
 
|-
 
| 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 {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
 
|-
 
| Enable respawn screen
 
| Boolean
 
| Set to false when the doImmediateRespawn gamerule is true.
 
|-
 
| Is Debug
 
| Boolean
 
| True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
 
|-
 
| Is Flat
 
| Boolean
 
| True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
 
|-
 
| 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.
 
|- {{added}}
 
| Portal cooldown
 
| VarInt
 
| The number of ticks until the player can use the portal again<sup>What impact does this have on the client? Needs more info</sup>.
 
 
  |}
 
  |}
  
 +
== Configuration ==
  
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]) includes three registries: "minecraft:dimension_type", "minecraft:worldgen/biome", and "minecraft:chat_type".
+
=== Clientbound ===
  
{| class="wikitable"
+
==== Cookie Request (configuration) ====
!Name
 
!Type
 
!style="width: 250px;" colspan="2"| Notes
 
|-
 
| minecraft:dimension_type
 
| TAG_Compound
 
| The dimension type registry (see below).
 
|-
 
| minecraft:worldgen/biome
 
| TAG_Compound
 
| The biome registry (see below).
 
|-
 
| minecraft:chat_type
 
| TAG_Compound
 
| The chat type registry (see below).
 
|}
 
  
Dimension type registry:
+
Requests a cookie that was previously stored.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
  !Name
+
  ! Packet ID
  !Type
+
! State
  !style="width: 250px;" colspan="2"| Notes
+
  ! Bound To
 +
  ! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 
  |-
 
  |-
  | type
+
  | rowspan="1"| 0x00
  | TAG_String
+
  | rowspan="1"| Configuration
  | The name of the registry. Always "minecraft:dimension_type".
+
  | rowspan="1"| Client
  |-
+
  | colspan="2"| Key
  | value
+
  | colspan="2"| Identifier
| TAG_List
+
  | The identifier of the cookie.
  | List of dimension types registry entries (see below).
 
 
  |}
 
  |}
  
Dimension type registry entry:
+
==== Store Cookie (configuration) ====
  
{| class="wikitable"
+
Stores some arbitrary data on the client, which persists between server transfers. The Notchian client only accepts cookies of up to 5 kiB in size.
!Name
 
!Type
 
!style="width: 250px;" colspan="2"| Notes
 
|-
 
| name
 
| TAG_String
 
| The name of the dimension type (for example, "minecraft:overworld").
 
|-
 
| id
 
| TAG_Int
 
| The protocol ID of the dimension (matches the index of the element in the registry list).
 
|-
 
| element
 
| TAG_Compound
 
| The dimension type (see below).
 
|}
 
  
Dimension type:
+
{| class="wikitable" {{added}}
 
+
  ! Packet ID
{| class="wikitable"
+
! State
  ! Name
+
  ! Bound To
  ! Type
+
  ! colspan="2"| Field Name
  !style="width: 250px;" colspan="2"| Meaning
+
! colspan="2"| Field Type
  ! Values
+
  ! Notes
 
  |-
 
  |-
  | piglin_safe
+
  | rowspan="2"| 0x09
| TAG_Byte
+
  | rowspan="2"| Configuration
| colspan="2"| Whether piglins shake and transform to zombified piglins.
+
  | rowspan="2"| Client
  | 1: true, 0: false.
+
  | colspan="2"| Key
|-
+
  | colspan="2"| Identifier
| has_raids
+
  | The identifier of the cookie.
| 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
 
| TAG_Byte
 
  | colspan="2"| When false, compasses spin randomly. When true, nether portals can spawn zombified piglins.
 
| 1: true, 0: false.
 
  |-
 
| ambient_light
 
| TAG_Float
 
| colspan="2"| How much light the dimension has.
 
| 0.0 to 1.0.
 
 
  |-
 
  |-
| fixed_time
+
  | colspan="2"| Payload
| Optional TAG_Long
+
  | colspan="2"| ByteArray(5120)
  | colspan="2"| If set, the time of the day is the specified value.
+
  | The data of the cookie.
| 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.
 
| 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:
+
==== Transfer (configuration) ====
 
 
{| class="wikitable"
 
!Name
 
!Type
 
!style="width: 250px;" colspan="2"| Notes
 
|-
 
| type
 
| TAG_String
 
| The name of the registry. Always "minecraft:worldgen/biome".
 
|-
 
| value
 
| TAG_List
 
| List of biome registry entries (see below).
 
|}
 
  
Biome registry entry:
+
Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
  !Name
+
  ! Packet ID
  !Type
+
! State
  !style="width: 250px;" colspan="2"| Notes
+
  ! Bound To
 +
  ! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 
  |-
 
  |-
  | name
+
  | rowspan="2"| 0x0A
  | TAG_String
+
| rowspan="2"| Configuration
  | The name of the biome (for example, "minecraft:ocean").
+
  | rowspan="2"| Client
 +
| colspan="2"| Host
 +
| colspan="2"| String
 +
  | The hostname of IP of the server.
 
  |-
 
  |-
  | id
+
  | colspan="2"| Port
  | TAG_Int
+
  | colspan="2"| VarInt
  | The protocol ID of the biome (matches the index of the element in the registry list).
+
  | The port of the server.
|-
 
| element
 
| TAG_Compound
 
| The biome properties (see below).
 
 
  |}
 
  |}
  
Biome properties:
+
=== Serverbound ===
 
 
{| class="wikitable"
 
! colspan="3"|Name
 
! colspan="2"|Type
 
!style="width: 250px;" colspan="2"| Meaning
 
! colspan="2"|Values
 
|-
 
| colspan="3"|precipitation
 
| colspan="2"|TAG_String
 
| colspan="2"| The type of precipitation in the biome.
 
| colspan="2"|"rain", "snow", or "none".
 
|-
 
| colspan="3"| depth
 
| colspan="2"| Optional TAG_Float
 
| colspan="2"| The depth factor of the biome.
 
| colspan="2"| The default values vary between 1.5 and -1.8.
 
|-
 
| colspan="3"| temperature
 
| colspan="2"| TAG_Float
 
| colspan="2"| The temperature factor of the biome.
 
| colspan="2"| The default values vary between 2.0 and -0.5.
 
|-
 
| colspan="3"| scale
 
| colspan="2"| Optional TAG_Float
 
| colspan="2"| ?
 
| colspan="2"| The default values vary between 1.225 and 0.0.
 
|-
 
| colspan="3"| downfall
 
| colspan="2"| TAG_Float
 
| colspan="2"| ?
 
| colspan="2"| The default values vary between 1.0 and 0.0.
 
|-
 
| colspan="3"| category
 
| colspan="2"| Optional TAG_String
 
| colspan="2"| The category of the biome.
 
| colspan="2"| Known values are "ocean", "plains", "desert", "forest", "extreme_hills", "taiga", "swamp", "river", "nether", "the_end", "icy", "mushroom", "beach", "jungle", "mesa", "savanna", and "none".
 
|-
 
| colspan="3"| temperature_modifier
 
| 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:
+
==== Cookie Response (configuration) ====
  
{| class="wikitable"
+
Response to a [[#Cookie_Request_(configuration)|Cookie Request (configuration)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
!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:
+
{| class="wikitable" {{added}}
 
+
! Packet ID
{| class="wikitable"
+
  ! State
  !Name
+
  ! Bound To
  !Type
+
  ! colspan="2"| Field Name
  !style="width: 250px;" colspan="2"| Notes
+
! colspan="2"| Field Type
 +
! Notes
 
  |-
 
  |-
  | name
+
  | rowspan="3"| 0x01
  | TAG_String
+
| rowspan="3"| Configuration
  | The type's name (eg "minecraft:chat")
+
| rowspan="3"| Server
 +
  | colspan="2"| Key
 +
  | colspan="2"| Identifier
 +
| The identifier of the cookie.
 
  |-
 
  |-
  | id
+
  | colspan="2"| Has Payload
  | TAG_Int
+
  | colspan="2"| Boolean
  |  
+
  | The payload is only present if the cookie exists on the client.
 
  |-
 
  |-
  | elements
+
  | colspan="2"| Payload
| TAG_Compound
+
  | colspan="2"| Optional ByteArray(5120)
  | "chat" and "narration" TAG_Compound's (see below)
+
| The data of the cookie, if any.
 
  |}
 
  |}
  
Chat type "chat" and "narration":
+
== Play ==
  
{| class="wikitable"
+
=== Clientbound ===
!Name
 
!Type
 
!style="width: 250px;" colspan="2"| Notes
 
|-
 
| translation_key
 
| TAG_String
 
|
 
|-
 
| style
 
| TAG_Compound
 
| Similar to Chat JSON (only present in "chat" TAG_Compound)
 
|-
 
| parameters
 
| TAG_List of TAG_String
 
| Values can be "sender", "target" and "content"
 
|}
 
  
==== Open Sign Editor ====
+
==== Cookie Request (play) ====
  
Sent when the client has placed a sign and is allowed to send [[#Update Sign|Update Sign]].  There must already be a sign at the given location (which the client does not do automatically) - send a [[#Block Update|Block Update]] first.
+
Requests a cookie that was previously stored.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="2" | 0x31
+
  | rowspan="1"| 0x16
  | rowspan="2" | Play
+
  | rowspan="1"| Play
  | rowspan="2" | Client
+
  | rowspan="1"| Client
  | Location
+
  | colspan="2"| Key
| Position
+
  | colspan="2"| Identifier
  |
+
  | The identifier of the cookie.
|- {{added}}
 
| Is Front Text
 
| Boolean
 
  | Whether the opened editor is for the front or on the back of the sign
 
 
  |}
 
  |}
  
==== Respawn ====
+
==== Store Cookie (play) ====
  
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.
+
Stores some arbitrary data on the client, which persists between server transfers. The Notchian client only accepts cookies of up to 5 kiB in size.
  
{| class="wikitable"
+
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
  ! Field Name
+
  ! colspan="2"| Field Name
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="12"| 0x41
+
  | rowspan="2"| 0x6A
  | rowspan="12"| Play
+
  | rowspan="2"| Play
  | rowspan="12"| Client
+
  | rowspan="2"| Client
  | Dimension Type
+
  | colspan="2"| Key
| Identifier
+
  | colspan="2"| Identifier
  | Valid dimensions are defined per dimension registry sent in [[#Login (play)|Login (play)]]
+
  | The identifier of the cookie.
|-
 
| Dimension Name
 
| Identifier
 
  | Name of the dimension being spawned into.
 
 
  |-
 
  |-
  | Hashed seed
+
  | colspan="2"| Payload
| Long
+
  | colspan="2"| ByteArray(5120)
| First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
+
  | The data of the cookie.
|-
 
| Gamemode
 
| Unsigned Byte
 
| 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
 
|-
 
  | Previous Gamemode
 
| Byte
 
| -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous gamemode. Vanilla client uses this for the debug (F3 + N & F3 + F4) gamemode switch. (More information needed)
 
|-
 
| Is Debug
 
| Boolean
 
| True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
 
|-
 
| Is Flat
 
| Boolean
 
| True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
 
|-
 
| 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
 
| 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.
 
|- {{added}}
 
| Portal cooldown
 
| VarInt
 
| The number of ticks until the player can use the portal again<sup>What impact does this have on the client? Needs more info</sup>.
 
 
  |}
 
  |}
  
{{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).
+
==== Transfer (play) ====
  
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.}}
+
Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
  
==== Update Section Blocks ====
+
{| class="wikitable" {{added}}
 
 
Fired whenever 2 or more blocks are changed within the same chunk on the same tick.
 
 
 
{{Warning|Changing blocks in chunks not loaded by the client is unsafe (see note on [[#Block Update|Block Update]]).}}
 
 
 
{| 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="4"| 0x43
+
  | rowspan="2"| 0x72
  | rowspan="4"| Play
+
  | rowspan="2"| Play
  | rowspan="4"| Client
+
  | rowspan="2"| Client
  | Chunk section position
+
  | colspan="2"| Host
| Long
+
  | colspan="2"| String
  | Chunk section coordinate (encoded chunk x and z with each 22 bits, and section y with 20 bits, from left to right).
+
  | The hostname of IP of the server.
|- {{removed}}
 
| Suppress Light Updates
 
| Boolean
 
  | Whether to ignore light updates caused by the contained changes. Always inverse the preceding Update Light packet's "Trust Edges" bool
 
 
  |-
 
  |-
  | Blocks array size
+
  | colspan="2"| Port
| VarInt
+
  | colspan="2"| VarInt
  | Number of elements in the following array.
+
  | The port of the server.
|-
 
  | Blocks
 
| Array of VarLong
 
| Each entry is composed of the block state id, shifted left by 12, and the relative block position in the chunk section (4 bits for x, z, and y, from left to right).
 
 
  |}
 
  |}
  
Chunk section position is encoded:
+
==== Update Attributes ====
<syntaxhighlight lang="java">
 
((sectionX & 0x3FFFFF) << 42) | (sectionY & 0xFFFFF) | ((sectionZ & 0x3FFFFF) << 20);
 
</syntaxhighlight>
 
and decoded:
 
<syntaxhighlight lang="java">
 
sectionX = long >> 42;
 
sectionY = long << 44 >> 44;
 
sectionZ = long << 22 >> 42;
 
</syntaxhighlight>
 
 
 
Blocks are encoded:
 
<syntaxhighlight lang="java">
 
blockStateId << 12 | (blockLocalX << 8 | blockLocalZ << 4 | blockLocalY)
 
//Uses the local position of the given block position relative to its respective chunk section
 
</syntaxhighlight>
 
  
==== Update Advancements ====
+
Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 980: Line 607:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="9"| 0x69
+
  | rowspan="6"| 0x71
  | rowspan="9"| Play
+
  | rowspan="6"| Play
  | rowspan="9"| Client
+
  | rowspan="6"| Client
  | colspan="2"| Reset/Clear
+
  | colspan="2"| Entity ID
  | colspan="2"| Boolean
+
  | colspan="2"| VarInt
  | Whether to reset/clear the current advancements.
+
  |
 
  |-
 
  |-
  | colspan="2"| Mapping size
+
  | colspan="2"| Number Of Properties
 
  | colspan="2"| VarInt
 
  | colspan="2"| VarInt
  | Size of the following array.
+
  | Number of elements in the following array.
 
  |-
 
  |-
  | rowspan="2"| Advancement mapping
+
  | rowspan="4"| Property
  | Key
+
  | {{change|Key|Id}}
  | rowspan="2"| Array
+
  | rowspan="4"| Array
  | Identifier
+
  | {{change|Identifier|VarInt Enum}}
  | The identifier of the advancement.
+
  | See below.
 
  |-
 
  |-
 
  | Value
 
  | Value
  | Advancement
+
  | Double
  | See below
+
  | See below.
 
  |-
 
  |-
  | colspan="2"| List size
+
  | Number Of Modifiers
| colspan="2"| VarInt
+
  | VarInt
| Size of the following array.
+
  | Number of elements in the following array.
|-
 
| colspan="2"| Identifiers
 
| colspan="2"| Array of Identifier
 
| The identifiers of the advancements that should be removed.
 
|-
 
| colspan="2"| Progress size
 
  | colspan="2"| VarInt
 
  | Size of the following array.
 
|-
 
| rowspan="2"| Progress mapping
 
| Key
 
| rowspan="2"| Array
 
| Identifier
 
| The identifier of the advancement.
 
 
  |-
 
  |-
  | Value
+
  | Modifiers
  | Advancement progress
+
  | Array of Modifier Data
  | See below.
+
  | See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
 
  |}
 
  |}
  
Advancement structure:
+
Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
  
 
{| class="wikitable"
 
{| class="wikitable"
! colspan="2"| Field Name
 
! colspan="2"| Field Type
 
! Notes
 
 
  |-
 
  |-
  | colspan="2"| Has parent
+
  ! Id
  | colspan="2"| Boolean
+
  ! Key
  | Indicates whether the next field exists.
+
  ! Default
 +
! Min
 +
! Max
 +
! Label
 
  |-
 
  |-
  | colspan="2"| Parent id
+
  | 0
  | colspan="2"| Optional Identifier
+
| generic.armor
  | The identifier of the parent advancement.
+
  | 0.0
 +
| 0.0
 +
| 30.0
 +
  | Armor.
 
  |-
 
  |-
  | colspan="2"| Has display
+
  | 1
  | colspan="2"| Boolean
+
| generic.armor_toughness
  | Indicates whether the next field exists.
+
  | 0.0
 +
| 0.0
 +
| 20.0
 +
  | Armor Toughness.
 
  |-
 
  |-
  | colspan="2"| Display data
+
  | 2
  | colspan="2"| Optional advancement display
+
| generic.attack_damage
  | See below.
+
  | 2.0
 +
| 0.0
 +
| 2048.0
 +
  | Attack Damage.
 
  |-
 
  |-
  | colspan="2"| Number of criteria
+
  | 3
  | colspan="2"| VarInt
+
| generic.attack_knockback
  | Size of the following array.
+
  | 0.0
 +
| 0.0
 +
| 5.0
 +
  | Attack Knockback.
 
  |-
 
  |-
  | rowspan="2"| Criteria
+
  | 4
  | Key
+
| generic.attack_speed
  | rowspan="2"| Array
+
| 4.0
  | Identifier
+
| 0.0
  | The identifier of the criterion.
+
| 1024.0
 +
| Attack Speed.
 +
  |- {{added}}
 +
  | 5
 +
| generic.block_interaction_range
 +
| 4.5
 +
| 0.0
 +
| 64.0
 +
| Block Interaction Range.
 +
|- {{added}}
 +
| 6
 +
| generic.entity_interaction_range
 +
| 3.0
 +
| 0.0
 +
  | 64.0
 +
  | Entity Interaction Range.
 
  |-
 
  |-
  | Value
+
  | 7
  | '''Void'''
+
  | generic.flying_speed
  | There is ''no'' content written here. Perhaps this will be expanded in the future?
+
| 0.4
 +
| 0.0
 +
| 1024.0
 +
  | Flying Speed.
 
  |-
 
  |-
  | colspan="2"| Array length
+
  | 8
  | colspan="2"| VarInt
+
| generic.follow_range
  | Number of arrays in the following array.
+
  | 32.0
 +
| 0.0
 +
| 2048.0
 +
  | Follow Range.
 
  |-
 
  |-
  | rowspan="2"| Requirements
+
  | 9
  | Array length 2
+
| horse.jump_strength
  | rowspan="2"| Array
+
  | 0.7
  | VarInt
+
  | 0.0
  | Number of elements in the following array.
+
  | 2.0
 +
  | Jump Strength.
 
  |-
 
  |-
  | Requirement
+
  | 10
  | Array of String
+
  | generic.knockback_resistance
  | Array of required criteria.
+
  | 0.0
  |- {{added}}
+
  | 0.0
  | colspan="2"| Sends telemetry data
+
  | 1.0
| colspan="2"| Boolean
+
  | Knockback Resistance.
  | Whether the client should include this achievement in the telemetry data when it's completed.
 
The Notchian client only sends data for advancements on the <code>minecraft</code> namespace.
 
|}
 
 
 
Advancement display:
 
 
 
{| class="wikitable"
 
! Field Name
 
! Field Type
 
! Notes
 
 
  |-
 
  |-
  | Title
+
  | 11
  | Chat
+
  | generic.luck
  |
+
  | 0.0
 +
| -1024.0
 +
| 1024.0
 +
| Luck.
 
  |-
 
  |-
  | Description
+
  | 12
  | Chat
+
  | generic.max_absorption
  |
+
  | 0.0
 +
| 0.0
 +
| 2048.0
 +
| Max Absorption.
 
  |-
 
  |-
  | Icon
+
  | 13
  | [[Slot]]
+
  | generic.max_health
  |
+
  | 20.0
 +
| 1.0
 +
| 1024.0
 +
| Max Health.
 
  |-
 
  |-
  | Frame type
+
  | 14
  | VarInt Enum
+
  | generic.movement_speed
  | 0 = <code>task</code>, 1 = <code>challenge</code>, 2 = <code>goal</code>.
+
  | 0.7
 +
| 0.0
 +
| 1024.0
 +
| Movement Speed.
 +
|- {{added}}
 +
| 15
 +
| generic.scale
 +
| 1.0
 +
| 0.0625
 +
| 16.0
 +
| Scale.
 
  |-
 
  |-
  | Flags
+
  | 16
  | Int
+
  | zombie.spawn_reinforcements
  | 0x01: has background texture; 0x02: <code>show_toast</code>; 0x04: <code>hidden</code>.
+
  | 0.0
  |-
+
  | 0.0
  | Background texture
+
  | 1.0
  | Optional Identifier
+
  | Spawn Reinforcements Chance.
| Background texture location.  Only if flags indicates it.
+
  |- {{added}}
  |-
+
  | 17
  | X coord
+
  | generic.step_height
  | Float
+
  | 0.6
  |
+
  | 0.0
  |-
+
  | 10.0
  | Y coord
+
  | Step Height.
| Float
 
  |
 
 
  |}
 
  |}
  
Advancement progress:
+
''Modifier Data'' structure:
  
 
{| class="wikitable"
 
{| class="wikitable"
  ! colspan="2"| Field Name
+
|-
  ! colspan="2"| Field Type
+
  ! Field Name
 +
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | colspan="2"| Size
+
  | UUID
  | colspan="2"| VarInt
+
  | UUID
  | Size of the following array.
+
  |
 
  |-
 
  |-
  | rowspan="2"| Criteria
+
  | Amount
| Criterion identifier
+
  | Double
| rowspan="2"| Array
+
  | May be positive or negative.
  | Identifier
 
  | The identifier of the criterion.
 
 
  |-
 
  |-
  | Criterion progress
+
  | Operation
  | Criterion progress
+
  | Byte
  |
+
  | See below.
 
  |}
 
  |}
  
Criterion progress:
+
The operation controls how the base value of the modifier is changed.
  
{| class="wikitable"
+
* 0: Add/subtract amount
! Field Name
+
* 1: Add/subtract amount percent of the current value
! Field Type
+
* 2: Multiply by amount percent
! Notes
 
|-
 
| Achieved
 
| Boolean
 
| If true, next field is present.
 
|-
 
| Date of achieving
 
| Optional Long
 
| As returned by [https://docs.oracle.com/javase/6/docs/api/java/util/Date.html#getTime() <code>Date.getTime</code>].
 
|}
 
  
==== Feature Flags ====
+
All of the 0's are applied first, and then the 1's, and then the 2's.
  
Used to enable and disable features, generally experimental ones, on the client.
+
==== Entity Effect ====
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,171: Line 814:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
  | rowspan="2"| 0x6B
+
  | rowspan="7"| 0x72
  | rowspan="2"| Play
+
  | rowspan="7"| Play
  | rowspan="2"| Client
+
  | rowspan="7"| Client
  | Total Features
+
  | Entity ID
 
  | VarInt
 
  | VarInt
| Number of features that appear in the array below.
 
|-
 
| Feature Flags
 
| Identifier Array
 
 
  |
 
  |
|}
 
 
As of {{change|1.19.4|1.20}}, the following feature flags are available:
 
 
* minecraft:vanilla - enables vanilla features</li>
 
* minecraft:bundle - enables support for the bundle</li>
 
* {{change|minecraft:update_1_20 - enables all the Minecraft 1.20 features that are available in 1.19.4</li>|}}
 
 
==== Update Recipes ====
 
 
{| class="wikitable"
 
! Packet ID
 
! State
 
! Bound To
 
! colspan="2"| Field Name
 
! colspan="2"| Field Type
 
! Notes
 
 
  |-
 
  |-
  | rowspan="4"| 0x6D
+
  | Effect ID
  | rowspan="4"| Play
+
  | VarInt
| rowspan="4"| Client
+
  | See {{Minecraft Wiki|Status effect#Effect list|this table}}.
| colspan="2"| Num Recipes
 
  | colspan="2"| VarInt
 
| Number of elements in the following array.
 
 
  |-
 
  |-
  | rowspan="3"| Recipe
+
  | Amplifier
| Type
+
  | Byte
| rowspan="3"| Array
+
  | Notchian client displays effect level as Amplifier + 1.
  | Identifier
 
  | The recipe type, see below.
 
 
  |-
 
  |-
  | Recipe ID
+
  | Duration
  | Identifier
+
  | VarInt
  |
+
  | Duration in ticks. (-1 for infinite)
 
  |-
 
  |-
  | Data
+
  | Flags
  | Varies
+
| Byte
  | Additional data for the recipe.
+
| Bit field, see below.
 +
|- {{removed}}
 +
| Has Factor Data
 +
  | Boolean
 +
| Used in DARKNESS effect
 +
  |- {{removed}}
 +
| Factor Codec
 +
| NBT Tag
 +
| See below
 
  |}
 
  |}
  
Recipe types:
+
{{Need Info|What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?}}
 +
 
 +
Within flags:
 +
 
 +
* 0x01: Is ambient - was the effect spawned from a beacon?  All beacon-generated effects are ambient.  Ambient effects use a different icon in the HUD (blue border rather than gray).  If all effects on an entity are ambient, the [[Entity_metadata#Living Entity|"Is potion effect ambient" living metadata field]] should be set to true.  Usually should not be enabled.
 +
* 0x02: Show particles - should all particles from this effect be hidden?  Effects with particles hidden are not included in the calculation of the effect color, and are not rendered on the HUD (but are still rendered within the inventory).  Usually should be enabled.
 +
* 0x04: Show icon - should the icon be displayed on the client?  Usually should be enabled.
 +
* {{change||0x08: Blend - should the effect's hard-coded blending be applied?  Currently only used in the DARKNESS effect to apply extra void fog and adjust the gamma value for lighting.}}
  
{| class="wikitable"
+
{{change|Factor Data|}}
  ! Type
+
{| class="wikitable" {{removed}}
  ! Description
+
  !Name
  ! Data
+
  !Type
 +
  !style="width: 250px;" colspan="2"| Notes
 
  |-
 
  |-
  | <code>minecraft:crafting_shapeless</code>
+
  | padding_duration
  | Shapeless crafting recipe. All items in the ingredient list must be present, but in any order/slot.
+
  | TAG_INT
  | As follows:
+
  |
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book. Tag is present in recipe JSON.
 
    |-
 
    |Category
 
    |VarInt Enum
 
    |Building = 0, Redstone = 1, Equipment = 2, Misc = 3
 
    |-
 
    | Ingredient count
 
    | VarInt
 
    | Number of elements in the following array.
 
    |-
 
    | Ingredients
 
    | Array of Ingredient.
 
    |
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |}
 
 
  |-
 
  |-
  | <code>minecraft:crafting_shaped</code>
+
  | factor_start
  | Shaped crafting recipe. All items must be present in the same pattern (which may be flipped horizontally or translated).
+
  | TAG_FLOAT
  | As follows:
+
  |
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Width
 
    | VarInt
 
    |
 
    |-
 
    | Height
 
    | VarInt
 
    |
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book. Tag is present in recipe JSON.
 
    |-
 
    |Category
 
    |VarInt Enum
 
    |Building = 0, Redstone = 1, Equipment = 2, Misc = 3
 
    |-
 
    | Ingredients
 
    | Array of Ingredient
 
    | Length is <code>width * height</code>. Indexed by <code>x + (y * width)</code>.
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |-
 
    | Show notification
 
    | Boolean
 
    | Show a toast when the recipe is [[Protocol#Update_Recipe_Book|added]].
 
    |}
 
 
  |-
 
  |-
  | <code>minecraft:crafting_special_armordye</code>
+
  | factor_target
  | Recipe for dying leather armor
+
  | TAG_FLOAT
  | rowspan="14" | As follows:
+
  |
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    |Category
 
    |VarInt Enum
 
    |Building = 0, Redstone = 1, Equipment = 2, Misc = 3
 
    |}
 
 
  |-
 
  |-
  | <code>minecraft:crafting_special_bookcloning</code>
+
  | factor_current
  | Recipe for copying contents of written books
+
| TAG_FLOAT
 +
  |
 
  |-
 
  |-
  | <code>minecraft:crafting_special_mapcloning</code>
+
  | effect_changed_timestamp
  | Recipe for copying maps
+
  | TAG_INT
 
  |-
 
  |-
  | <code>minecraft:crafting_special_mapextending</code>
+
  | factor_previous_frame
  | Recipe for adding paper to maps
+
  | TAG_FLOAT
|-
 
| <code>minecraft:crafting_special_firework_rocket</code>
 
| Recipe for making firework rockets
 
|-
 
| <code>minecraft:crafting_special_firework_star</code>
 
| Recipe for making firework stars
 
|-
 
| <code>minecraft:crafting_special_firework_star_fade</code>
 
| Recipe for making firework stars fade between multiple colors
 
|-
 
| <code>minecraft:crafting_special_repairitem</code>
 
| Recipe for repairing items via crafting
 
|-
 
| <code>minecraft:crafting_special_tippedarrow</code>
 
| Recipe for crafting tipped arrows
 
|-
 
| <code>minecraft:crafting_special_bannerduplicate</code>
 
| Recipe for copying banner patterns
 
|-
 
| <code>minecraft:crafting_special_shielddecoration</code>
 
| Recipe for applying a banner's pattern to a shield
 
|-
 
| <code>minecraft:crafting_special_shulkerboxcoloring</code>
 
| Recipe for recoloring a shulker box
 
|-
 
| <code>minecraft:crafting_special_suspiciousstew</code>
 
| Recipe for crafting suspicious stews
 
|-
 
| <code>minecraft:crafting_decorated_pot</code>
 
| Recipe for crafting decorated pots
 
{{change|{{Warning|The Notchian server only sends this recipe if [[Protocol#Feature_Flags|feature flag]] '''update_1_20''' was enabled}}|}}
 
|-
 
| <code>minecraft:smelting</code>
 
| Smelting recipe
 
| rowspan="4"| As follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book.
 
    |-
 
    |Category
 
    |VarInt Enum
 
    |Food = 0, Blocks = 1, Misc = 2
 
    |-
 
    | Ingredient
 
    | Ingredient
 
    |
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |-
 
    | Experience
 
    | Float
 
    |
 
    |-
 
    | Cooking time
 
    | VarInt
 
    |
 
    |}
 
|-
 
| <code>minecraft:blasting</code>
 
| Blast furnace recipe
 
|-
 
| <code>minecraft:smoking</code>
 
| Smoker recipe
 
|-
 
| <code>minecraft:campfire_cooking</code>
 
| Campfire recipe
 
|-
 
| <code>minecraft:stonecutting</code>
 
| Stonecutter recipe
 
| As follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Group
 
    | String
 
    | Used to group similar recipes together in the recipe book.  Tag is present in recipe JSON.
 
    |-
 
    | Ingredient
 
    | Ingredient
 
    |
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |}
 
|- {{removed}}
 
| <code>minecraft:smithing</code>
 
| Smithing table recipe
 
{{Warning|The Notchian server only sends this recipe if [[Protocol#Feature_Flags|feature flag]] '''update_1_20''' was '''not''' enabled}}
 
| As follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Base
 
    | Ingredient
 
    | First item.
 
    |-
 
    | Addition
 
    | Ingredient
 
    | Second item.
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |}
 
|-
 
| <code>minecraft:smithing_transform</code>
 
| Recipe for smithing netherite gear
 
{{change|{{Warning2|The Notchian server only sends this recipe if [[Protocol#Feature_Flags|feature flag]] '''update_1_20''' was enabled. It supersedes the <code>minecraft:smithing</code> recipe type}}|}}
 
| As follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Template
 
    | Ingredient
 
    | The smithing template.
 
    |-
 
    | Base
 
    | Ingredient
 
    | The base item.
 
    |-
 
    | Addition
 
    | Ingredient
 
    | The additional ingredient.
 
    |-
 
    | Result
 
    | [[Slot]]
 
    |
 
    |}
 
|-
 
| <code>minecraft:smithing_trim</code>
 
| Recipe for applying armor trims
 
{{change|{{Warning2|The Notchian server only sends this recipe if [[Protocol#Feature_Flags|feature flag]] '''update_1_20''' was enabled. It supersedes the <code>minecraft:smithing</code> recipe type}}|}}
 
| As follows:
 
  {| class="wikitable"
 
    ! Name
 
    ! Type
 
    ! Description
 
    |-
 
    | Template
 
    | Ingredient
 
    | The smithing template.
 
    |-
 
    | Base
 
    | Ingredient
 
    | The base item.
 
    |-
 
    | Addition
 
    | Ingredient
 
    | The additional ingredient.
 
    |}
 
|}
 
 
 
Ingredient is defined as:
 
 
 
{| class="wikitable"
 
! Name
 
! Type
 
! Description
 
|-
 
| Count
 
| VarInt
 
| Number of elements in the following array.
 
 
  |-
 
  |-
  | Items
+
  | had_effect_last_tick
  | Array of [[Slot]]
+
  | TAG_BOOLEAN
| Any item in this array may be used for the recipe.  The count of each item should be 1.
 
 
  |}
 
  |}
  
 
=== Serverbound ===
 
=== Serverbound ===
  
==== Update Sign ====
+
==== Cookie Response (play) ====
  
This message is sent from the client to the server when the “Done” button is pushed after placing a sign.
+
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.
  
The server only accepts this packet after [[#Open Sign Editor|Open Sign Editor]], otherwise this packet is silently ignored.
+
{| 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="6"| 0x2E
+
  | rowspan="3"| 0x6A
  | rowspan="6"| Play
+
  | rowspan="3"| Play
  | rowspan="6"| Server
+
  | rowspan="3"| Server
  | Location
+
  | colspan="2"| Key
| Position
+
  | colspan="2"| Identifier
  | Block Coordinates.
+
  | The identifier of the cookie.
|- {{added}}
 
| Is Front Text
 
| Boolean
 
  | Whether the updated text is in front or on the back of the sign
 
 
  |-
 
  |-
  | Line 1
+
  | colspan="2"| Has Payload
| String (384)
+
  | colspan="2"| Boolean
| First line of text in the sign.
+
  | The payload is only present if the cookie exists on the client.
|-
 
  | Line 2
 
| String (384)
 
  | Second line of text in the sign.
 
|-
 
| Line 3
 
| String (384)
 
| Third line of text in the sign.
 
 
  |-
 
  |-
  | Line 4
+
  | colspan="2"| Payload
  | String (384)
+
  | colspan="2"| Optional ByteArray(5120)
  | Fourth line of text in the sign.
+
  | The data of the cookie, if any.
 
  |}
 
  |}
 
== Status ==
 
 
=== Clientbound ===
 
 
No changes so far.
 
 
=== Serverbound ===
 
 
No changes so far.
 
 
== Login ==
 
 
=== Clientbound ===
 
 
No changes so far.
 
 
=== Serverbound ===
 
 
No changes so far.
 
 
  
 
[[Category:Minecraft Modern]]
 
[[Category:Minecraft Modern]]

Revision as of 05:25, 26 February 2024

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

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

Contents

Data types

No changes so far.

Packets

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

New/modified data types

No changes so far.

Entity Metadata

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

Armadillo

Extends Animal.

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

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Handshake

Serverbound

Handshake

This causes the server to switch into the target state.

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

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

Cookie Request (login)

Requests a cookie that was previously stored.

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

Serverbound

Cookie Response (login)

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

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

Configuration

Clientbound

Cookie Request (configuration)

Requests a cookie that was previously stored.

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

Store Cookie (configuration)

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

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

Transfer (configuration)

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

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

Serverbound

Cookie Response (configuration)

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

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

Play

Clientbound

Cookie Request (play)

Requests a cookie that was previously stored.

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

Store Cookie (play)

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

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

Transfer (play)

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

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

Update Attributes

Sets attributes on the given entity.

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

Known Key values (see also Attribute#Modifiers):

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

Modifier Data structure:

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

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

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

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

Entity Effect

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

Within flags:

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

Factor Data

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

Serverbound

Cookie Response (play)

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

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