Difference between revisions of "Pre-release protocol"

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This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.2, protocol 764]]) to the current pre-release (currently [[Protocol version numbers|23w45a, protocol {{Snapshot PVN|1073741986}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
+
This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.4, protocol 765]]) to the current pre-release (currently [[Protocol version numbers|24w13a, protocol {{Snapshot PVN|1073742006}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
  
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
 
One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
Line 9: Line 9:
 
=== Data types ===
 
=== Data types ===
  
−
==== NBT ====
+
No changes so far.
−
 
 
−
The NBT specification was changed so that the root tag is no longer required to be a [[NBT#Specification:compound_tag|Compound Tag]] when sent over the network.
 
−
 
 
−
Presently in the pre-release, only [[NBT#Specification:compound_tag|Compound Tag]] and [[NBT#Specification:string_tag|String Tag]] types are used as root, but the Notchian server/client implementation is able to handle [[NBT#Specification|NBT Tags]] of any type.
 
−
 
 
−
==== Chat ====
 
−
 
 
−
The [[Chat]] type is now serialized as a [[NBT#Specification|NBT Tag]] instead of a JSON String, unless explicitly stated otherwise.
 
−
 
 
−
{| class="wikitable"
 
−
|-
 
−
! Name
 
−
! Size (bytes)
 
−
! Encodes
 
−
! Notes
 
−
|- {{removed}}
 
−
! id=Definitions:chat | [[#Definitions:chat|Chat]]
 
−
| ≥ 1 <br />≤ (262144&times;4) + 3
 
−
| See [[Chat]]
 
−
| Encoded as a String with max length of 262144.
 
−
|- {{added}}
 
−
! id=Definitions:chat | [[#Definitions:chat|Chat]]
 
−
| Varies
 
−
| See [[Chat]]
 
−
| Encoded as a [[NBT|NBT Tag]], with the type of tag used depending on the case:
 
−
* As a [[NBT#Specification:string_tag|String Tag]]: For components only containing text (no styling, no events etc.).
 
−
* As a [[NBT#Specification:compound_tag|Compound Tag]]: Every other case.
 
−
|}
 
−
 
 
−
This affects the following packets and data types containing Chat fields:
 
−
* [[Protocol#Disconnect (configuration)|Disconnect (configuration)]]
 
−
* [[Protocol#Resource Pack (configuration)|Resource Pack (configuration)]]
 
−
* [[Protocol#Boss Bar|Boss Bar]]
 
−
* [[Protocol#Command Suggestions Response|Command Suggestions Response]]
 
−
* [[Protocol#Disconnect (play)|Disconnect (play)]]
 
−
* [[Protocol#Disguised Chat Message|Disguised Chat Message]]
 
−
* [[Protocol#Map Data|Map Data]]
 
−
* [[Protocol#Open Screen|Open Screen]]
 
−
* [[Protocol#Player Chat Message|Player Chat Message]]
 
−
* [[Protocol#Combat Death|Combat Death]]
 
−
* [[Protocol#Player Info Update|Player Info Update]]
 
−
* [[Protocol#Resource Pack (play)|Resource Pack (play)]]
 
−
* [[Protocol#Server Data|Server Data]]
 
−
* [[Protocol#Set Action Bar Text|Set Action Bar Text]]
 
−
* [[Protocol#Update Objectives|Update Objectives]]
 
−
* [[Protocol#Update Teams|Update Teams]]
 
−
* [[Protocol#Set Subtitle Text|Set Subtitle Text]]
 
−
* [[Protocol#Set Title Text|Set Title Text]]
 
−
* [[Protocol#System Chat Message|System Chat Message]]
 
−
* [[Protocol#Set Tab List Header And Footer|Set Tab List Header And Footer]]
 
−
* [[Protocol#Update Advancements|Update Advancements]]
 
−
<br>
 
−
* [[Slot|Slot data type (values in the item NBT field)]]
 
−
* [[Entity_metadata#Entity_Metadata_Format|Chat entity metadata type]]
 
−
* [[Entity_metadata#Entity_Metadata_Format|OptChat entity metadata type]]
 
−
<br>
 
−
However, the following are '''NOT''' affected, as to maintain backwards compatibility with older versions:
 
−
* [[Protocol#Disconnect (login)|Disconnect (login)]]
 
−
* [[Server_List_Ping#Status_Response|Server List status response (the description field)]]
 
−
 
 
−
==== Particle ====
 
−
 
 
−
{| class="wikitable"
 
−
|-
 
−
! Particle Name
 
−
! Particle ID
 
−
! Data
 
−
|-
 
−
| <code>minecraft:ambient_entity_effect</code>
 
−
| 0
 
−
| None
 
−
|-
 
−
| <code>minecraft:angry_villager</code>
 
−
| 1
 
−
| None
 
−
|-
 
−
| <code>minecraft:block</code>
 
−
| 2
 
−
|
 
−
{| class="wikitable"
 
−
  ! Field Name
 
−
  ! Field Type
 
−
  ! Meaning
 
−
  |-
 
−
  | BlockState
 
−
  | VarInt
 
−
  | The ID of the block state.
 
−
  |}
 
−
|-
 
−
| <code>minecraft:block_marker</code>
 
−
| 3
 
−
|
 
−
{| class="wikitable"
 
−
  ! Field Name
 
−
  ! Field Type
 
−
  ! Meaning
 
−
  |-
 
−
  | BlockState
 
−
  | VarInt
 
−
  | The ID of the block state.
 
−
  |}
 
−
|-
 
−
| <code>minecraft:bubble</code>
 
−
| 4
 
−
| None
 
−
|-
 
−
| <code>minecraft:cloud</code>
 
−
| 5
 
−
| None
 
−
|-
 
−
| <code>minecraft:crit</code>
 
−
| 6
 
−
| None
 
−
|-
 
−
| <code>minecraft:damage_indicator</code>
 
−
| 7
 
−
| None
 
−
|-
 
−
| <code>minecraft:dragon_breath</code>
 
−
| 8
 
−
| None
 
−
|-
 
−
| <code>minecraft:dripping_lava</code>
 
−
| 9
 
−
| None
 
−
|-
 
−
| <code>minecraft:falling_lava</code>
 
−
| 10
 
−
| None
 
−
|-
 
−
| <code>minecraft:landing_lava</code>
 
−
| 11
 
−
| None
 
−
|-
 
−
| <code>minecraft:dripping_water</code>
 
−
| 12
 
−
| None
 
−
|-
 
−
| <code>minecraft:falling_water</code>
 
−
| 13
 
−
| None
 
−
|-
 
−
| <code>minecraft:dust</code>
 
−
| 14
 
−
|
 
−
{| class="wikitable"
 
−
  ! Field Name
 
−
  ! Field Type
 
−
  ! Meaning
 
−
  |-
 
−
  | Red
 
−
  | Float
 
−
  | The red RGB value, between 0 and 1. Divide actual RGB value by 255.
 
−
  |-
 
−
  | Green
 
−
  | Float
 
−
  | The green RGB value, between 0 and 1. Divide actual RGB value by 255.
 
−
  |-
 
−
  | Blue
 
−
  | Float
 
−
  | The blue RGB value, between 0 and 1. Divide actual RGB value by 255.
 
−
  |-
 
−
  | Scale
 
−
  | Float
 
−
  | The scale, will be clamped between 0.01 and 4.
 
−
  |}
 
−
|-
 
−
| <code>minecraft:dust_color_transition</code>
 
−
| 15
 
−
|
 
−
{| class="wikitable"
 
−
  ! Field Name
 
−
  ! Field Type
 
−
  ! Meaning
 
−
  |-
 
−
  | From Red
 
−
  | Float
 
−
  | The start red RGB value, between 0 and 1. Divide actual RGB value by 255.
 
−
  |-
 
−
  | From Green
 
−
  | Float
 
−
  | The start green RGB value, between 0 and 1. Divide actual RGB value by 255.
 
−
  |-
 
−
  | From Blue
 
−
  | Float
 
−
  | The start blue RGB value, between 0 and 1. Divide actual RGB value by 255.
 
−
  |-
 
−
  | Scale
 
−
  | Float
 
−
  | The scale, will be clamped between 0.01 and 4.
 
−
  |-
 
−
  | To Red
 
−
  | Float
 
−
  | The end red RGB value, between 0 and 1. Divide actual RGB value by 255.
 
−
  |-
 
−
  | To Green
 
−
  | Float
 
−
  | The end green RGB value, between 0 and 1. Divide actual RGB value by 255.
 
−
  |-
 
−
  | To Blue
 
−
  | Float
 
−
  | The end blue RGB value, between 0 and 1. Divide actual RGB value by 255.
 
−
  |}
 
−
|-
 
−
| <code>minecraft:effect</code>
 
−
| 16
 
−
| None
 
−
|-
 
−
| <code>minecraft:elder_guardian</code>
 
−
| 17
 
−
| None
 
−
|-
 
−
| <code>minecraft:enchanted_hit</code>
 
−
| 18
 
−
| None
 
−
|-
 
−
| <code>minecraft:enchant</code>
 
−
| 19
 
−
| None
 
−
|-
 
−
| <code>minecraft:end_rod</code>
 
−
| 20
 
−
| None
 
−
|-
 
−
| <code>minecraft:entity_effect</code>
 
−
| 21
 
−
| None
 
−
|-
 
−
| <code>minecraft:explosion_emitter</code>
 
−
| 22
 
−
| None
 
−
|-
 
−
| <code>minecraft:explosion</code>
 
−
| 23
 
−
| None
 
−
|- {{added}}
 
−
| <code>minecraft:gust</code>
 
−
| 24
 
−
| None
 
−
|- {{added}}
 
−
| <code>minecraft:gust_emitter</code>
 
−
| 25
 
−
| None
 
−
|-
 
−
| <code>minecraft:sonic_boom</code>
 
−
| {{change|24|26}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:falling_dust</code>
 
−
| {{change|25|27}}
 
−
|
 
−
{| class="wikitable"
 
−
  ! Field Name
 
−
  ! Field Type
 
−
  ! Meaning
 
−
  |-
 
−
  | BlockState
 
−
  | VarInt
 
−
  | The ID of the block state.
 
−
  |}
 
−
|-
 
−
| <code>minecraft:firework</code>
 
−
| {{change|26|28}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:fishing</code>
 
−
| {{change|27|29}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:flame</code>
 
−
| {{change|28|30}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:cherry_leaves</code>
 
−
| {{change|29|31}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:sculk_soul</code>
 
−
| {{change|30|32}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:sculk_charge</code>
 
−
| {{change|31|33}}
 
−
|
 
−
{| class="wikitable"
 
−
  ! Field Name
 
−
  ! Field Type
 
−
  ! Meaning
 
−
  |-
 
−
  | Roll
 
−
  | Float
 
−
  | How much the particle will be rotated when displayed.
 
−
  |}
 
−
|-
 
−
| <code>minecraft:sculk_charge_pop</code>
 
−
| {{change|32|34}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:soul_fire_flame</code>
 
−
| {{change|33|35}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:soul</code>
 
−
| {{change|34|36}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:flash</code>
 
−
| {{change|35|37}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:happy_villager</code>
 
−
| {{change|36|38}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:composter</code>
 
−
| {{change|37|39}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:heart</code>
 
−
| {{change|38|40}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:instant_effect</code>
 
−
| {{change|39|41}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:item</code>
 
−
| {{change|40|42}}
 
−
|
 
−
{| class="wikitable"
 
−
  ! Field Name
 
−
  ! Field Type
 
−
  ! Meaning
 
−
  |-
 
−
  | Item
 
−
  | [[Slot]]
 
−
  | The item that will be used.
 
−
  |}
 
−
|-
 
−
| <code>minecraft:vibration</code>
 
−
| {{change|41|43}}
 
−
|
 
−
{| class="wikitable"
 
−
  ! Field Name
 
−
  ! Field Type
 
−
  ! Meaning
 
−
  |-
 
−
  | Position Source Type
 
−
  | Identifier
 
−
  | The type of the vibration source
 
−
  |-
 
−
  | Block Position
 
−
  | Position
 
−
  | The position of the block the vibration originated from. Only present if Position Type is <code>minecraft:block</code>.
 
−
  |-
 
−
  | Entity ID
 
−
  | VarInt
 
−
  | The ID of the entity the vibration originated from. Only present if Position Type is <code>minecraft:entity</code>.
 
−
  |-
 
−
  | Entity eye height
 
−
  | Float
 
−
  | The height of the entity's eye relative to the entity. Only present if Position Type is <code>minecraft:entity</code>.
 
−
  |-
 
−
  | Ticks
 
−
  | VarInt
 
−
  | The amount of ticks it takes for the vibration to travel from its source to its destination.
 
−
  |}
 
−
|-
 
−
| <code>minecraft:item_slime</code>
 
−
| {{change|42|44}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:item_snowball</code>
 
−
| {{change|43|45}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:large_smoke</code>
 
−
| {{change|44|46}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:lava</code>
 
−
| {{change|45|47}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:mycelium</code>
 
−
| {{change|46|48}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:note</code>
 
−
| {{change|47|49}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:poof</code>
 
−
| {{change|48|50}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:portal</code>
 
−
| {{change|49|51}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:rain</code>
 
−
| {{change|50|52}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:smoke</code>
 
−
| {{change|51|53}}
 
−
| None
 
−
|- {{added}}
 
−
| <code>minecraft:white_smoke</code>
 
−
| 54
 
−
| None
 
−
|-
 
−
| <code>minecraft:sneeze</code>
 
−
| {{change|52|55}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:spit</code>
 
−
| {{change|53|56}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:squid_ink</code>
 
−
| {{change|54|57}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:sweep_attack</code>
 
−
| {{change|55|58}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:totem_of_undying</code>
 
−
| {{change|56|59}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:underwater</code>
 
−
| {{change|57|60}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:splash</code>
 
−
| {{change|58|61}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:witch</code>
 
−
| {{change|59|62}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:bubble_pop</code>
 
−
| {{change|60|63}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:current_down</code>
 
−
| {{change|61|64}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:bubble_column_up</code>
 
−
| {{change|62|65}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:nautilus</code>
 
−
| {{change|63|66}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:dolphin</code>
 
−
| {{change|64|67}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:campfire_cosy_smoke</code>
 
−
| {{change|65|68}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:campfire_signal_smoke</code>
 
−
| {{change|66|69}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:dripping_honey</code>
 
−
| {{change|67|70}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:falling_honey</code>
 
−
| {{change|68|71}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:landing_honey</code>
 
−
| {{change|69|72}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:falling_nectar</code>
 
−
| {{change|70|73}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:falling_spore_blossom</code>
 
−
| {{change|71|74}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:ash</code>
 
−
| {{change|72|75}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:crimson_spore</code>
 
−
| {{change|73|76}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:warped_spore</code>
 
−
| {{change|74|77}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:spore_blossom_air</code>
 
−
| {{change|75|78}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:dripping_obsidian_tear</code>
 
−
| {{change|76|79}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:falling_obsidian_tear</code>
 
−
| {{change|77|80}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:landing_obsidian_tear</code>
 
−
| {{change|78|81}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:reverse_portal</code>
 
−
| {{change|79|82}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:white_ash</code>
 
−
| {{change|80|83}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:small_flame</code>
 
−
| {{change|81|84}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:snowflake</code>
 
−
| {{change|82|85}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:dripping_dripstone_lava</code>
 
−
| {{change|83|86}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:falling_dripstone_lava</code>
 
−
| {{change|84|87}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:dripping_dripstone_water</code>
 
−
| {{change|85|88}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:falling_dripstone_water</code>
 
−
| {{change|86|89}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:glow_squid_ink</code>
 
−
| {{change|87|90}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:glow</code>
 
−
| {{change|88|91}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:wax_on</code>
 
−
| {{change|89|92}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:wax_off</code>
 
−
| {{change|90|93}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:electric_spark</code>
 
−
| {{change|91|94}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:scrape</code>
 
−
| {{change|92|95}}
 
−
| None
 
−
|-
 
−
| <code>minecraft:shriek</code>
 
−
| {{change|93|96}}
 
−
|
 
−
{| class="wikitable"
 
−
  ! Field Name
 
−
  ! Field Type
 
−
  ! Meaning
 
−
  |-
 
−
  | Delay
 
−
  | VarInt
 
−
  | The time in ticks before the particle is displayed
 
−
  |}
 
−
|-
 
−
| <code>minecraft:egg_crack</code>
 
−
| {{change|94|97}}
 
−
| None
 
−
|- {{added}}
 
−
| <code>minecraft:dust_plume</code>
 
−
| 98
 
−
| None
 
−
|- {{added}}
 
−
| <code>minecraft:gust_dust</code>
 
−
| 99
 
−
| None
 
−
|- {{added}}
 
−
| <code>minecraft:trial_spawner_detection</code>
 
−
| 100
 
−
| None
 
−
|}
 
  
 
=== Packets ===
 
=== Packets ===
Line 622: Line 17:
 
  ! Packet name
 
  ! Packet name
 
  !colspan="2"| Documentation
 
  !colspan="2"| Documentation
 +
|-
 +
!colspan="4"| Handshake serverbound
 +
{{PacketList|0x00|Handshake}}
 +
|-
 +
!colspan="4"| Login clientbound
 +
{{PacketList|0x01|Encryption Request}}
 +
{{PacketList|0x05|Cookie Request (login)|rel=added}}
 +
|-
 +
!colspan="4"| Login serverbound
 +
{{PacketList|0x04|Cookie Response (login)|rel=added}}
 
  |-
 
  |-
 
  !colspan="4"| Configuration clientbound
 
  !colspan="4"| Configuration clientbound
−
  {{PacketList|0x07|Feature Flags}}
+
  {{PacketList|0x00|Cookie Request (configuration)|rel=added}}
 +
{{PacketList|{{change|0x00|0x01}}|Clientbound Plugin Message (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x01|0x02}}|Disconnect (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x03|0x04}}|Clientbound Keep Alive (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x04|0x05}}|Ping (configuration)|pre=unchanged}}
 +
{{PacketList|0x06|Reset Chat|rel=added}}
 +
{{PacketList|{{change|0x05|0x07}}|Registry Data}}
 +
{{PacketList|{{change|0x06|0x08}}|Remove Resource Pack (configuration)|pre=unchanged}}
 +
{{PacketList|{{change|0x07|0x09}}|Add Resource Pack (configuration)|pre=unchanged}}
 +
{{PacketList|0x0A|Store Cookie (configuration)|rel=added}}
 +
{{PacketList|0x0B|Transfer (configuration)|rel=added}}
 +
{{PacketList|{{change|0x08|0x0C}}|Feature Flags|pre=unchanged}}
 +
{{PacketList|{{change|0x09|0x0D}}|Update Tags (configuration)|pre=unchanged}}
 +
{{PacketList|0x0E|Clientbound Known Packs|rel=added}}
 +
|-
 +
!colspan="4"| 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}}
 +
{{PacketList|0x07|Serverbound Known Packs|rel=added}}
 
  |-
 
  |-
 
  !colspan="4"| Play clientbound
 
  !colspan="4"| Play clientbound
−
  {{PacketList|0x1E|Explosion}}
+
  {{PacketList|0x16|Cookie Request (Play)|rel=added}}
−
  {{PacketList|0x20|Game Event}}
+
{{PacketList|{{change|0x16|0x17}}|Set Cooldown|pre=unchanged}}
−
  {{PacketList|0x6C|Set Ticking State|rel=added}}
+
{{PacketList|{{change|0x17|0x18}}|Chat Suggestions|pre=unchanged}}
−
  {{PacketList|0x6D|Step Tick|rel=added}}
+
{{PacketList|{{change|0x18|0x19}}|Clientbound Plugin Message (play)|pre=unchanged}}
−
  {{PacketList|{{change|0x6C|0x6E}}|Update Advancements|pre=unchanged}}
+
{{PacketList|{{change|0x19|0x1A}}|Damage Event|pre=unchanged}}
−
  {{PacketList|{{change|0x6D|0x6F}}|Update Attributes|pre=unchanged}}
+
{{PacketList|0x1B|Debug Sample|rel=added}}
−
  {{PacketList|{{change|0x6E|0x70}}|Entity Effect|pre=unchanged}}
+
{{PacketList|{{change|0x1A|0x1C}}|Delete Message|pre=unchanged}}
−
  {{PacketList|{{change|0x6F|0x71}}|Update Recipes|pre=unchanged}}
+
{{PacketList|{{change|0x1B|0x1D}}|Disconnect (play)|pre=unchanged}}
−
  {{PacketList|{{change|0x70|0x72}}|Update Tags|pre=unchanged}}
+
{{PacketList|{{change|0x1C|0x1E}}|Disguised Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x1D|0x1F}}|Entity Event|pre=unchanged}}
 +
{{PacketList|{{change|0x1E|0x20}}|Explosion|pre=unchanged}}
 +
  {{PacketList|{{change|0x1F|0x21}}|Unload Chunk|pre=unchanged}}
 +
{{PacketList|{{change|0x20|0x22}}|Game Event|pre=unchanged}}
 +
{{PacketList|{{change|0x21|0x23}}|Open Horse Screen|pre=unchanged}}
 +
{{PacketList|{{change|0x22|0x24}}|Hurt Animation|pre=unchanged}}
 +
{{PacketList|{{change|0x23|0x25}}|Initialize World Border|pre=unchanged}}
 +
{{PacketList|{{change|0x24|0x26}}|Clientbound Keep Alive (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x25|0x27}}|Chunk Data and Update Light|pre=unchanged}}
 +
{{PacketList|{{change|0x26|0x28}}|World Event|pre=unchanged}}
 +
{{PacketList|{{change|0x27|0x29}}|Particle|pre=unchanged}}
 +
{{PacketList|{{change|0x28|0x2A}}|Update Light|pre=unchanged}}
 +
{{PacketList|{{change|0x29|0x2B}}|Login (play)}}
 +
{{PacketList|{{change|0x2A|0x2C}}|Map Data|pre=unchanged}}
 +
{{PacketList|{{change|0x2B|0x2D}}|Merchant Offers|pre=unchanged}}
 +
{{PacketList|{{change|0x2C|0x2E}}|Update Entity Position|pre=unchanged}}
 +
{{PacketList|{{change|0x2D|0x2F}}|Update Entity Position and Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2E|0x30}}|Update Entity Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x2F|0x31}}|Move Vehicle|pre=unchanged}}
 +
{{PacketList|{{change|0x30|0x32}}|Open Book|pre=unchanged}}
 +
{{PacketList|{{change|0x31|0x33}}|Open Screen|pre=unchanged}}
 +
{{PacketList|{{change|0x32|0x34}}|Open Sign Editor|pre=unchanged}}
 +
{{PacketList|{{change|0x33|0x35}}|Ping (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x34|0x36}}|Ping Response (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x35|0x37}}|Place Ghost Recipe|pre=unchanged}}
 +
{{PacketList|{{change|0x36|0x38}}|Player Abilities|pre=unchanged}}
 +
{{PacketList|{{change|0x37|0x39}}|Player Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x38|0x3A}}|End Combat|pre=unchanged}}
 +
{{PacketList|{{change|0x39|0x3B}}|Enter Combat|pre=unchanged}}
 +
{{PacketList|{{change|0x3A|0x3C}}|Combat Death|pre=unchanged}}
 +
{{PacketList|{{change|0x3B|0x3D}}|Player Info Remove|pre=unchanged}}
 +
{{PacketList|{{change|0x3C|0x3E}}|Player Info Update|pre=unchanged}}
 +
{{PacketList|{{change|0x3D|0x3F}}|Look At|pre=unchanged}}
 +
{{PacketList|{{change|0x3E|0x40}}|Synchronize Player Position|pre=unchanged}}
 +
{{PacketList|{{change|0x3F|0x41}}|Update Recipe Book|pre=unchanged}}
 +
{{PacketList|{{change|0x40|0x42}}|Remove Entities|pre=unchanged}}
 +
{{PacketList|{{change|0x41|0x43}}|Remove Entity Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x42|0x44}}|Reset Score|pre=unchanged}}
 +
{{PacketList|{{change|0x43|0x45}}|Remove Resource Pack (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x44|0x46}}|Add Resource Pack (play)|pre=unchanged}}
 +
{{PacketList|{{change|0x45|0x47}}|Respawn}}
 +
{{PacketList|{{change|0x46|0x48}}|Set Head Rotation|pre=unchanged}}
 +
{{PacketList|{{change|0x47|0x49}}|Update Section Blocks|pre=unchanged}}
 +
{{PacketList|{{change|0x48|0x4A}}|Select Advancements Tab|pre=unchanged}}
 +
{{PacketList|{{change|0x49|0x4B}}|Server Data|pre=unchanged}}
 +
{{PacketList|{{change|0x4A|0x4C}}|Set Action Bar Text|pre=unchanged}}
 +
{{PacketList|{{change|0x4B|0x4D}}|Set Border Center|pre=unchanged}}
 +
{{PacketList|{{change|0x4C|0x4E}}|Set Border Lerp Size|pre=unchanged}}
 +
{{PacketList|{{change|0x4D|0x4F}}|Set Border Size|pre=unchanged}}
 +
  {{PacketList|{{change|0x4E|0x50}}|Set Border Warning Delay|pre=unchanged}}
 +
{{PacketList|{{change|0x4F|0x51}}|Set Border Warning Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x50|0x52}}|Set Camera|pre=unchanged}}
 +
{{PacketList|{{change|0x51|0x53}}|Set Held Item|pre=unchanged}}
 +
{{PacketList|{{change|0x52|0x54}}|Set Center Chunk|pre=unchanged}}
 +
{{PacketList|{{change|0x53|0x55}}|Set Render Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x54|0x56}}|Set Default Spawn Position|pre=unchanged}}
 +
{{PacketList|{{change|0x55|0x57}}|Display Objective|pre=unchanged}}
 +
{{PacketList|{{change|0x56|0x58}}|Set Entity Metadata|pre=unchanged}}
 +
{{PacketList|{{change|0x57|0x59}}|Link Entities|pre=unchanged}}
 +
{{PacketList|{{change|0x58|0x5A}}|Set Entity Velocity|pre=unchanged}}
 +
{{PacketList|{{change|0x59|0x5B}}|Set Equipment|pre=unchanged}}
 +
{{PacketList|{{change|0x5A|0x5C}}|Set Experience|pre=unchanged}}
 +
{{PacketList|{{change|0x5B|0x5D}}|Set Health|pre=unchanged}}
 +
{{PacketList|{{change|0x5C|0x5E}}|Update Objectives|pre=unchanged}}
 +
{{PacketList|{{change|0x5D|0x5F}}|Set Passengers|pre=unchanged}}
 +
{{PacketList|{{change|0x5E|0x60}}|Update Teams|pre=unchanged}}
 +
{{PacketList|{{change|0x5F|0x61}}|Update Score|pre=unchanged}}
 +
{{PacketList|{{change|0x60|0x62}}|Set Simulation Distance|pre=unchanged}}
 +
{{PacketList|{{change|0x61|0x63}}|Set Subtitle Text|pre=unchanged}}
 +
{{PacketList|{{change|0x62|0x64}}|Update Time|pre=unchanged}}
 +
{{PacketList|{{change|0x63|0x65}}|Set Title Text|pre=unchanged}}
 +
{{PacketList|{{change|0x64|0x66}}|Set Title Animation Times|pre=unchanged}}
 +
{{PacketList|{{change|0x65|0x67}}|Entity Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x66|0x68}}|Sound Effect|pre=unchanged}}
 +
{{PacketList|{{change|0x67|0x69}}|Start Configuration|pre=unchanged}}
 +
{{PacketList|{{change|0x68|0x6A}}|Stop Sound|pre=unchanged}}
 +
{{PacketList|0x6B|Store Cookie (Play)|rel=added}}
 +
  {{PacketList|{{change|0x69|0x6C}}|System Chat Message|pre=unchanged}}
 +
{{PacketList|{{change|0x6A|0x6D}}|Set Tab List Header And Footer|pre=unchanged}}
 +
  {{PacketList|{{change|0x6B|0x6E}}|Tag Query Response|pre=unchanged}}
 +
  {{PacketList|{{change|0x6C|0x6F}}|Pickup Item|pre=unchanged}}
 +
  {{PacketList|{{change|0x6D|0x70}}|Teleport Entity|pre=unchanged}}
 +
{{PacketList|{{change|0x6E|0x71}}|Set Ticking State|pre=unchanged}}
 +
  {{PacketList|{{change|0x6F|0x72}}|Step Tick|pre=unchanged}}
 +
{{PacketList|0x73|Transfer (Play)|rel=added}}
 +
{{PacketList|{{change|0x70|0x74}}|Update Advancements|pre=unchanged}}
 +
{{PacketList|{{change|0x71|0x75}}|Update Attributes}}
 +
{{PacketList|{{change|0x72|0x76}}|Entity Effect}}
 +
{{PacketList|{{change|0x73|0x77}}|Update Recipes|pre=unchanged}}
 +
  {{PacketList|{{change|0x74|0x78}}|Update Tags (play)|pre=unchanged}}
 
  |-
 
  |-
 
  !colspan="4"| Play serverbound
 
  !colspan="4"| Play serverbound
−
  {{PacketList|0x0F|Change Container Slot State|rel=added}}
+
  {{PacketList|0x04|Chat Command}}
−
  {{PacketList|{{change|0x0F|0x10}}|Serverbound Plugin Message (play)|pre=unchanged}}
+
{{PacketList|0x05|Signed Chat Command|rel=added}}
−
  {{PacketList|{{change|0x10|0x11}}|Edit Book|pre=unchanged}}
+
{{PacketList|{{change|0x05|0x06}}|Chat Message|pre=unchanged}}
−
  {{PacketList|{{change|0x11|0x12}}|Query Entity Tag|pre=unchanged}}
+
{{PacketList|{{change|0x06|0x07}}|Player Session|pre=unchanged}}
−
  {{PacketList|{{change|0x12|0x13}}|Interact|pre=unchanged}}
+
{{PacketList|{{change|0x07|0x08}}|Chunk Batch Received|pre=unchanged}}
−
  {{PacketList|{{change|0x13|0x14}}|Jigsaw Generate|pre=unchanged}}
+
{{PacketList|{{change|0x08|0x09}}|Client Status|pre=unchanged}}
−
  {{PacketList|{{change|0x14|0x15}}|Serverbound Keep Alive (play)|pre=unchanged}}
+
{{PacketList|{{change|0x09|0x0A}}|Client Information (play)|pre=unchanged}}
−
  {{PacketList|{{change|0x15|0x16}}|Lock Difficulty|pre=unchanged}}
+
{{PacketList|{{change|0x0A|0x0B}}|Command Suggestions Request|pre=unchanged}}
−
  {{PacketList|{{change|0x16|0x17}}|Set Player Position|pre=unchanged}}
+
{{PacketList|{{change|0x0B|0x0C}}|Acknowledge Configuration|pre=unchanged}}
−
  {{PacketList|{{change|0x17|0x18}}|Set Player Position and Rotation|pre=unchanged}}
+
{{PacketList|{{change|0x0C|0x0D}}|Click Container Button|pre=unchanged}}
−
  {{PacketList|{{change|0x18|0x19}}|Set Player Rotation|pre=unchanged}}
+
{{PacketList|{{change|0x0D|0x0E}}|Click Container|pre=unchanged}}
−
  {{PacketList|{{change|0x19|0x1A}}|Set Player On Ground|pre=unchanged}}
+
{{PacketList|{{change|0x0E|0x0F}}|Close Container|pre=unchanged}}
−
  {{PacketList|{{change|0x1A|0x1B}}|Move Vehicle|pre=unchanged}}
+
{{PacketList|{{change|0x0F|0x10}}|Change Container Slot State|pre=unchanged}}
−
  {{PacketList|{{change|0x1B|0x1C}}|Paddle Boat|pre=unchanged}}
+
{{PacketList|0x11|Cookie Response (play)|rel=added}}
−
  {{PacketList|{{change|0x1C|0x1D}}|Pick Item|pre=unchanged}}
+
  {{PacketList|{{change|0x10|0x12}}|Serverbound Plugin Message (play)|pre=unchanged}}
−
  {{PacketList|{{change|0x1D|0x1E}}|Ping Request (play)|pre=unchanged}}
+
{{PacketList|0x13|Debug Sample Subscription|rel=added}}
−
  {{PacketList|{{change|0x1E|0x1F}}|Place Recipe|pre=unchanged}}
+
  {{PacketList|{{change|0x11|0x14}}|Edit Book|pre=unchanged}}
−
  {{PacketList|{{change|0x1F|0x20}}|Player Abilities|pre=unchanged}}
+
  {{PacketList|{{change|0x12|0x15}}|Query Entity Tag|pre=unchanged}}
−
  {{PacketList|{{change|0x20|0x21}}|Player Action|pre=unchanged}}
+
  {{PacketList|{{change|0x13|0x16}}|Interact|pre=unchanged}}
−
  {{PacketList|{{change|0x21|0x22}}|Player Command|pre=unchanged}}
+
  {{PacketList|{{change|0x14|0x17}}|Jigsaw Generate|pre=unchanged}}
−
  {{PacketList|{{change|0x22|0x23}}|Player Input|pre=unchanged}}
+
  {{PacketList|{{change|0x15|0x18}}|Serverbound Keep Alive (play)|pre=unchanged}}
−
  {{PacketList|{{change|0x23|0x24}}|Pong (play)|pre=unchanged}}
+
  {{PacketList|{{change|0x16|0x19}}|Lock Difficulty|pre=unchanged}}
−
  {{PacketList|{{change|0x24|0x25}}|Change Recipe Book Settings|pre=unchanged}}
+
  {{PacketList|{{change|0x17|0x1A}}|Set Player Position|pre=unchanged}}
−
  {{PacketList|{{change|0x25|0x26}}|Set Seen Recipe|pre=unchanged}}
+
  {{PacketList|{{change|0x18|0x1B}}|Set Player Position and Rotation|pre=unchanged}}
−
  {{PacketList|{{change|0x26|0x27}}|Rename Item|pre=unchanged}}
+
  {{PacketList|{{change|0x19|0x1C}}|Set Player Rotation|pre=unchanged}}
−
  {{PacketList|{{change|0x27|0x28}}|Resource Pack Response (play)|pre=unchanged}}
+
  {{PacketList|{{change|0x1A|0x1D}}|Set Player On Ground|pre=unchanged}}
−
  {{PacketList|{{change|0x28|0x29}}|Seen Advancements|pre=unchanged}}
+
  {{PacketList|{{change|0x1B|0x1E}}|Move Vehicle|pre=unchanged}}
−
  {{PacketList|{{change|0x29|0x2A}}|Select Trade|pre=unchanged}}
+
  {{PacketList|{{change|0x1C|0x1F}}|Paddle Boat|pre=unchanged}}
−
  {{PacketList|{{change|0x2A|0x2B}}|Set Beacon Effect|pre=unchanged}}
+
  {{PacketList|{{change|0x1D|0x20}}|Pick Item|pre=unchanged}}
−
  {{PacketList|{{change|0x2B|0x2C}}|Set Held Item|pre=unchanged}}
+
  {{PacketList|{{change|0x1E|0x21}}|Ping Request (play)|pre=unchanged}}
−
  {{PacketList|{{change|0x2C|0x2D}}|Program Command Block|pre=unchanged}}
+
  {{PacketList|{{change|0x1F|0x22}}|Place Recipe|pre=unchanged}}
−
  {{PacketList|{{change|0x2D|0x2E}}|Program Command Block Minecart|pre=unchanged}}
+
  {{PacketList|{{change|0x20|0x23}}|Player Abilities|pre=unchanged}}
−
  {{PacketList|{{change|0x2E|0x2F}}|Set Creative Mode Slot|pre=unchanged}}
+
  {{PacketList|{{change|0x21|0x24}}|Player Action|pre=unchanged}}
−
  {{PacketList|{{change|0x2F|0x30}}|Program Jigsaw Block}}
+
  {{PacketList|{{change|0x22|0x25}}|Player Command|pre=unchanged}}
−
  {{PacketList|{{change|0x30|0x31}}|Program Structure Block|pre=unchanged}}
+
  {{PacketList|{{change|0x23|0x26}}|Player Input|pre=unchanged}}
−
  {{PacketList|{{change|0x31|0x32}}|Update Sign|pre=unchanged}}
+
  {{PacketList|{{change|0x24|0x27}}|Pong (play)|pre=unchanged}}
−
  {{PacketList|{{change|0x32|0x33}}|Swing Arm|pre=unchanged}}
+
  {{PacketList|{{change|0x25|0x28}}|Change Recipe Book Settings|pre=unchanged}}
−
  {{PacketList|{{change|0x33|0x34}}|Teleport To Entity|pre=unchanged}}
+
  {{PacketList|{{change|0x26|0x29}}|Set Seen Recipe|pre=unchanged}}
−
  {{PacketList|{{change|0x34|0x35}}|Use Item On|pre=unchanged}}
+
  {{PacketList|{{change|0x27|0x2A}}|Rename Item|pre=unchanged}}
−
  {{PacketList|{{change|0x35|0x36}}|Use Item|pre=unchanged}}
+
  {{PacketList|{{change|0x28|0x2B}}|Resource Pack Response (play)|pre=unchanged}}
 +
  {{PacketList|{{change|0x29|0x2C}}|Seen Advancements|pre=unchanged}}
 +
  {{PacketList|{{change|0x2A|0x2D}}|Select Trade|pre=unchanged}}
 +
  {{PacketList|{{change|0x2B|0x2E}}|Set Beacon Effect|pre=unchanged}}
 +
  {{PacketList|{{change|0x2C|0x2F}}|Set Held Item|pre=unchanged}}
 +
  {{PacketList|{{change|0x2D|0x30}}|Program Command Block|pre=unchanged}}
 +
  {{PacketList|{{change|0x2E|0x31}}|Program Command Block Minecart|pre=unchanged}}
 +
  {{PacketList|{{change|0x2F|0x32}}|Set Creative Mode Slot|pre=unchanged}}
 +
  {{PacketList|{{change|0x30|0x33}}|Program Jigsaw Block|pre=unchanged}}
 +
  {{PacketList|{{change|0x31|0x34}}|Program Structure Block|pre=unchanged}}
 +
  {{PacketList|{{change|0x32|0x35}}|Update Sign|pre=unchanged}}
 +
  {{PacketList|{{change|0x33|0x36}}|Swing Arm|pre=unchanged}}
 +
  {{PacketList|{{change|0x34|0x37}}|Teleport To Entity|pre=unchanged}}
 +
  {{PacketList|{{change|0x35|0x38}}|Use Item On|pre=unchanged}}
 +
  {{PacketList|{{change|0x36|0x39}}|Use Item|pre=unchanged}}
 
  |}
 
  |}
  
Line 686: Line 218:
 
== Entity Metadata ==
 
== Entity Metadata ==
  
−
{| class="wikitable"
+
{{#vardefine: meta_prerelease | 1}}
−
! Type ([[Data Types#Definitions:varint|VarInt]]&nbsp;Enum)
+
 
−
  ! Value (Varies)
+
{{Metadata type definition/begin}}
 +
  ! Value
 
  ! Notes
 
  ! Notes
−
|-
+
{{Metadata type definition|Byte}}
−
| 0
+
  | {{Type|Byte}}
−
  | [[Data Types#Definitions:byte|Byte]]
 
 
  |
 
  |
−
|-
+
{{Metadata type definition|VarInt}}
−
| 1
+
  | {{Type|VarInt}}
−
  | [[Data Types#Definitions:varint|VarInt]]
 
 
  |
 
  |
−
|-
+
{{Metadata type definition|VarLong}}
−
| 2
+
  | {{Type|VarLong}}
−
  | [[Data Types#Definitions:varlong|VarLong]]
 
 
  |
 
  |
−
|-
+
{{Metadata type definition|Float}}
−
| 3
+
  | {{Type|Float}}
−
  | [[Data Types#Definitions:float|Float]]
 
 
  |
 
  |
−
|-
+
{{Metadata type definition|String}}
−
| 4
+
  | {{Type|String}}
−
  | [[Data Types#Definitions:string|String]]
 
 
  |
 
  |
−
|-
+
{{Metadata type definition|Text Component}}
−
| 5
+
  | {{Type|Text Component}}
−
  | [[Data Types#Definitions:chat|Chat]]
 
 
  |
 
  |
−
|-
+
{{Metadata type definition|Optional Text Component}}
−
  | 6
+
  | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Text Component}})
−
| OptChat (Boolean + [[Data Types#Definitions:chat|Chat]])
+
  | Text Component is present if the Boolean is set to true.
−
  | [[Data Types#Definitions:chat|Chat]] is present if the Boolean is set to true
+
{{Metadata type definition|Slot}}
−
|-
+
  | {{Type|Slot}}
−
| 7
 
−
  | [[Data Types#Definitions:slot|Slot]]
 
 
  |
 
  |
−
|-
+
{{Metadata type definition|Boolean}}
−
| 8
+
  | {{Type|Boolean}}
−
  | [[Data Types#Definitions:boolean|Boolean]]
 
−
|
 
−
|-
 
−
| 9
 
−
| [[Data Types#Definitions:rotation|Rotation]]
 
−
| 3 [[Data Types#Definitions:float|Floats]]: rotation on x, rotation on y, rotation on z
 
−
|-
 
−
| 10
 
−
| [[Data Types#Position|Position]]
 
 
  |
 
  |
−
|-
+
{{Metadata type definition|Rotations}}
−
  | 11
+
  | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
−
| OptPosition (Boolean + Position)
+
  | rotation on x, rotation on y, rotation on z
−
| Position is present if the Boolean is set to true
+
{{Metadata type definition|Position}}
−
|-
+
  | {{Type|Position}}
−
| 12
 
−
| Direction ([[Data Types#Definitions:varint|VarInt]])
 
−
  | (Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5)
 
−
|-
 
−
  | 13
 
−
| OptUUID (Boolean + UUID)
 
−
| UUID is present if the Boolean is set to true
 
−
|-
 
−
| 14
 
−
| BlockID ([[Data Types#Definitions:varint|VarInt]])
 
−
|-
 
−
| 15
 
−
| OptBlockID ([[Data Types#Definitions:varint|VarInt]])
 
−
| 0 for absent (implies air); otherwise, a block state ID as per the global palette
 
−
|-
 
−
| 16
 
−
| [[Data_types#Definitions:nbt|NBT]]
 
 
  |
 
  |
−
  |-
+
{{Metadata type definition|Optional Position}}
−
  | 17
+
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|Position}})
−
  | [[Data Types#Particle|Particle]]
+
| Position is present if the Boolean is set to true.
 +
{{Metadata type definition|Direction}}
 +
| {{Type|VarInt}} {{Type|Enum}}
 +
| Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5
 +
{{Metadata type definition|Optional UUID}}
 +
| ({{Type|Boolean}}, {{Type|Optional}} {{Type|UUID}})
 +
| UUID is present if the Boolean is set to true.
 +
{{Metadata type definition|Block State}}
 +
  | {{Type|VarInt}}
 +
  | An ID in the block state registry.
 +
{{Metadata type definition|Optional Block State}}
 +
| {{Type|VarInt}}
 +
| 0 for absent (air is unrepresentable); otherwise, an ID in the block state registry.
 +
{{Metadata type definition|NBT}}
 +
  | {{Type|NBT}}
 
  |
 
  |
−
  |-
+
{{Metadata type definition|Particle}}
−
  | 18
+
  | ({{Type|VarInt}}, Varies)
−
  | Villager Data
+
  | particle type (an ID in the <code>minecraft:particle_type</code> registry), particle data (See [[Particles]].)
−
  | 3 [[Data Types#Definitions:varint|VarInts]]: villager type, villager profession, level
+
{{Metadata type definition|Particles|rel=added}}
−
|-
+
  | ({{Type|VarInt}}, Array of Particle)
−
  | 19
+
| length of array, particle data (See directly above.)
−
| OptVarInt
+
{{Metadata type definition|Villager Data}}
−
  | 0 for absent; 1 + actual value otherwise. Used for entity IDs.
+
  | ({{Type|VarInt}}, {{Type|VarInt}}, {{Type|VarInt}})
−
|-
+
| villager type, villager profession, level (See below.)
−
  | 20
+
{{Metadata type definition|Optional VarInt}}
−
| Pose
+
  | {{Type|VarInt}}
−
  | A [[Data Types#Definitions:varint|VarInt]] enum: 0: STANDING, 1: FALL_FLYING, 2: SLEEPING, 3: SWIMMING, 4: SPIN_ATTACK, 5: SNEAKING, 6: LONG_JUMPING, 7: DYING, 8: CROAKING, 9: USING_TONGUE, 10: SITTING, 11: ROARING, 12: SNIFFING, 13: EMERGING, 14: DIGGING{{change||, 15: SLIDING, 16: SHOOTING, 17: INHALING}}
+
  | 0 for absent; 1 + actual value otherwise. Used for entity IDs.
−
|-
+
{{Metadata type definition|Pose}}
−
  | 21
+
  | {{Type|VarInt}} {{Type|Enum}}
−
| Cat Variant
+
  | 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}}
−
  | A [[Data Types#Definitions:varint|VarInt]] that points towards the CAT_VARIANT registry.
+
{{Metadata type definition|Cat Variant}}
−
  |-
+
  | {{Type|VarInt}}
−
  | 22
+
  | An ID in the <code>minecraft:cat_variant</code> registry.
−
| Frog Variant
+
{{Metadata type definition|Wolf Variant|rel=added}}
−
  | A [[Data Types#Definitions:varint|VarInt]] that points towards the FROG_VARIANT registry.
+
  | {{Type|VarInt}}
−
|-
+
  | An ID in the <code>minecraft:wolf_variant</code> registry.
−
  | 23
+
{{Metadata type definition|Frog Variant}}
−
| OptGlobalPos (Boolean + GlobalPos)
+
  | {{Type|VarInt}}
−
  | GlobalPos consists of a dimension identifier and [[Data Types#Position|Position]].
+
| An ID in the <code>minecraft:frog_variant</code> registry.
−
|-
+
{{Metadata type definition|Optional Global Position}}
−
  | 24
+
  | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Identifier}}, {{Type|Optional}} {{Type|Position}})
−
| Painting Variant
+
  | dimension identifier, position; only if the Boolean is set to true.
−
  | A [[Data Types#Definitions:varint|VarInt]] that points towards the PAINTING_VARIANT registry.
+
{{Metadata type definition|Painting Variant}}
−
|-
+
  | {{Type|VarInt}}
−
  | 25
+
  | An ID in the <code>minecraft:painting_variant</code> registry.
−
| Sniffer State
+
{{Metadata type definition|Sniffer State}}
−
  | A [[Data Types#Definitions:varint|VarInt]] enum: IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
+
  | {{Type|VarInt}} {{Type|Enum}}
−
  |-
+
  | IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
−
  | 26
+
{{Metadata type definition|Armadillo State|rel=added}}
−
| Vector3
+
  | {{Type|VarInt}} {{Type|Enum}}
−
  | 3 [[Data Types#Definitions:float|Floats]]: x, y, z
+
  | IDLE = 0, ROLLING = 1, SCARED = 2
−
|-
+
{{Metadata type definition|Vector3}}
−
  | 27
+
  | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
−
| Quaternion
+
| x, y, z
−
  | 4 [[Data Types#Definitions:float|Floats]]: x, y, z, w
+
{{Metadata type definition|Quaternion}}
−
|-
+
  | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}}, {{Type|Float}})
 +
  | x, y, z, w
 
  |}
 
  |}
  
−
=== Abstract Vehicle ===
+
=== Living Entity ===
  
−
{{Metadata inherit|Abstract Vehicle|inherits=Entity|start_at=8}}
+
TODO: This has changed to use the PARTICLES attribute
 +
 
 +
=== Wolf ===
 +
 
 +
{{Metadata inherit|Wolf|inherits=Tameable Animal}}
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 815: Line 333:
 
  |- {{added}}
 
  |- {{added}}
 
  | {{Metadata id|}}
 
  | {{Metadata id|}}
−
  | VarInt
+
  | {{Metadata type|Wolf Variant}}
−
  |colspan="2"| Shaking power
+
  |colspan="2"| Wolf Variant
−
  | 0
+
  | PALE
−
  |- {{added}}
+
  |-
 
  | {{Metadata id|}}
 
  | {{Metadata id|}}
−
  | VarInt
+
  | {{Metadata type|Boolean}}
−
  |colspan="2"| Shaking direction
+
  |colspan="2"| Is begging
−
  | 1
+
  | false
−
  |- {{added}}
+
  |-
 
  | {{Metadata id|}}
 
  | {{Metadata id|}}
−
  | Float
+
  | {{Metadata type|VarInt}}
−
  |colspan="2"| Shaking multiplier
+
  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
−
  | 0.0
+
  | 14 (Red)
 
  |-
 
  |-
−
  |}
+
  | {{Metadata id|}}
−
 
+
  | {{Metadata type|VarInt}}
−
=== Abstract Minecart===
+
  |colspan="2"| Anger time
−
 
 
−
{{Metadata inherit|Abstract Minecart|inherits=Abstract Vehicle}}
 
−
 
 
−
{| class="wikitable"
 
−
! Index
 
−
! Type
 
−
!style="width: 250px;" colspan="2"| Meaning
 
−
! Default
 
−
  |- {{removed}}
 
−
| 8
 
−
| VarInt
 
−
|colspan="2"| Shaking power
 
−
| 0
 
−
|- {{removed}}
 
−
| 9
 
−
| VarInt
 
−
|colspan="2"| Shaking direction
 
−
| 1
 
−
|- {{removed}}
 
−
| 10
 
−
| Float
 
−
|colspan="2"| Shaking multiplier
 
−
| 0.0
 
−
|-
 
−
| 11
 
−
| VarInt
 
−
  |colspan="2"| Custom block ID and damage
 
 
  | 0
 
  | 0
−
|-
 
−
| 12
 
−
| VarInt
 
−
|colspan="2"| Custom block Y position (in 16ths of a block)
 
−
| 6
 
−
|-
 
−
| 13
 
−
| Boolean
 
−
|colspan="2"| Show custom block
 
−
| false
 
 
  |}
 
  |}
  
−
=== Boat ===
+
=== Armadillo ===
  
−
{{Metadata inherit|Boat|inherits=Abstract Vehicle}}
+
{{Metadata inherit|Armadillo|inherits=Animal|start_at=17}}
−
 
+
{| class="wikitable" {{added}}
−
{| class="wikitable"
 
 
  ! Index
 
  ! Index
 
  ! Type
 
  ! Type
 
  !style="width: 250px;" colspan="2"| Meaning
 
  !style="width: 250px;" colspan="2"| Meaning
 
  ! Default
 
  ! Default
−
|- {{removed}}
 
−
| 8
 
−
| VarInt
 
−
|colspan="2"| Time since last hit
 
−
| 0
 
−
|- {{removed}}
 
−
| 9
 
−
| VarInt
 
−
|colspan="2"| Forward direction
 
−
| 1
 
−
|- {{removed}}
 
−
| 10
 
−
| Float
 
−
|colspan="2"| Damage taken
 
−
| 0.0
 
 
  |-
 
  |-
−
  | 11
+
  | {{Metadata id|added}}
−
| VarInt
+
  | {{Metadata type|Armadillo State}}
−
|colspan="2"| Type (0=oak, 1=spruce, 2=birch, 3=jungle, 4=acacia, 5=dark oak)
+
  |colspan="2"| Armadillo State
−
| 0
+
  | IDLE
−
|-
 
−
| 12
 
−
| Boolean
 
−
|colspan="2"| Is left paddle turning
 
−
| false
 
−
|-
 
−
| 13
 
−
| Boolean
 
−
  |colspan="2"| Is right paddle turning
 
−
| false
 
−
|-
 
−
| 14
 
−
| VarInt
 
−
  |colspan="2"| Splash timer
 
−
  | 0
 
 
  |}
 
  |}
  
Line 929: Line 379:
  
 
No changes so far.
 
No changes so far.
 +
 +
== Handshake ==
 +
 +
=== Serverbound ===
 +
 +
==== Handshake ====
 +
 +
This causes the server to switch into the target state.
 +
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
|-
 +
| rowspan="4"| 0x00
 +
| rowspan="4"| Handshaking
 +
| rowspan="4"| Server
 +
| Protocol Version
 +
| [[#Definitions:varint|VarInt]]
 +
| See [[protocol version numbers]] (currently 765 in Minecraft 1.20.4).
 +
|-
 +
| Server Address
 +
| [[#Definitions:string|String]] (255)
 +
| Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect. The Notchian server does not use this information. Note that SRV records are a simple redirect, e.g. if _minecraft._tcp.example.com points to mc.example.org, users connecting to example.com will provide example.org as server address in addition to connecting to it.
 +
|-
 +
| Server Port
 +
| [[#Definitions:unsigned-short|Unsigned Short]]
 +
| Default is 25565. The Notchian server does not use this information.
 +
|-
 +
| Next State
 +
| [[#Definitions:varint|VarInt]] [[#Definitions:enum|Enum]]
 +
| 1 for [[#Status|Status]], 2 for [[#Login|Login]]{{change||, 3 for [[#Login|Transfer]]}}.
 +
|}
  
 
== Status ==
 
== Status ==
Line 944: Line 430:
 
=== Clientbound ===
 
=== Clientbound ===
  
−
No changes so far.
+
==== Encryption Request ====
 +
 
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
|-
 +
| rowspan="6"| 0x01
 +
| rowspan="6"| Login
 +
| rowspan="6"| Client
 +
| Server ID
 +
| {{Type|String}} (20)
 +
| Appears to be empty.
 +
|-
 +
| Public Key Length
 +
| {{Type|VarInt}}
 +
| Length of Public Key.
 +
|-
 +
| Public Key
 +
| {{Type|Byte Array}}
 +
| The server's public key, in bytes.
 +
|-
 +
| Verify Token Length
 +
| {{Type|VarInt}}
 +
| Length of Verify Token. Always 4 for Notchian servers.
 +
|-
 +
| Verify Token
 +
| {{Type|Byte Array}}
 +
| A sequence of random bytes generated by the server.
 +
|- {{added}}
 +
| Should Authenticate
 +
| {{Type|Boolean}}
 +
|
 +
|}
 +
 
 +
==== Cookie Request (login) ====
 +
 
 +
Requests a cookie that was previously stored.
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="1"| 0x05
 +
| rowspan="1"| Login
 +
| rowspan="1"| Client
 +
| colspan="2"| Key
 +
| colspan="2"| Identifier
 +
| The identifier of the cookie.
 +
|}
  
 
=== Serverbound ===
 
=== Serverbound ===
  
−
No changes so far.
+
==== Cookie Response (login) ====
 +
 
 +
Response to a [[#Cookie_Request_(login)|Cookie Request (login)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="4"| 0x04
 +
| rowspan="4"| Login
 +
| rowspan="4"| Server
 +
| colspan="2"| Key
 +
| colspan="2"| Identifier
 +
| The identifier of the cookie.
 +
|-
 +
| colspan="2"| Has Payload
 +
| colspan="2"| Boolean
 +
| The payload is only present if the cookie exists on the client.
 +
|-
 +
| colspan="2"| Payload Length
 +
| colspan="2"| VarInt
 +
| Length of the following byte array.
 +
|-
 +
| colspan="2"| Payload
 +
| colspan="2"| Optional Byte Array (5120)
 +
| The data of the cookie, if any.
 +
|}
  
 
== Configuration ==
 
== Configuration ==
Line 954: Line 526:
 
=== Clientbound ===
 
=== Clientbound ===
  
−
==== Feature Flags ====
+
==== Cookie Request (configuration) ====
  
−
Used to enable and disable features, generally experimental ones, on the client.
+
Requests a cookie that was previously stored.
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="1"| 0x00
 +
| rowspan="1"| Configuration
 +
| rowspan="1"| Client
 +
| colspan="2"| Key
 +
| colspan="2"| Identifier
 +
| The identifier of the cookie.
 +
|}
  
−
{| class="wikitable"
+
==== Reset Chat ====
 +
 
 +
{| class="wikitable" {{added}}
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 966: Line 556:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="2"| 0x07
+
| 0x06
 +
| Configuration
 +
| Client
 +
| colspan="3"| ''no fields''
 +
|}
 +
 
 +
==== Registry Data ====
 +
 
 +
Represents certain registries that are sent from the server and are applied on the client. {{change||The packet is sent for each of the following registries: <code>minecraft:worldgen/biome</code>, <code>minecraft:chat_type</code>, <code>minecraft:trim_pattern</code>, <code>minecraft:trim_material</code>, <code>minecraft:wolf_variant</code>, <code>minecraft:dimension_type</code>, <code>minecraft:damage_type</code>, and <code>minecraft:banner_pattern</code>.}}
 +
 
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
  | rowspan="6"| 0x07
 +
| rowspan="6"| Configuration
 +
| rowspan="6"| Client
 +
|{{removed}} colspan="2"| Registry Codec
 +
|{{removed}} colspan="2"| {{Type|NBT}} (Compound)
 +
|{{removed}}| See [[Registry Data]].
 +
|- {{added}}
 +
| colspan="2"| Registry ID
 +
| colspan="2"| Identifier
 +
|
 +
|- {{added}}
 +
| colspan="2"| Entry Count
 +
| colspan="2"| VarInt
 +
| Number of entries in the following array.
 +
|- {{added}}
 +
| rowspan="3"| Entries
 +
| Entry ID
 +
| rowspan="3"| Array
 +
| Identifier
 +
|
 +
|- {{added}}
 +
| Has Data
 +
| Boolean
 +
| Whether the entry has any data following.
 +
|- {{added}}
 +
| Data
 +
| NBT Tag
 +
| Entry data. Only present if Has Data is true.
 +
|}
 +
 
 +
==== Store Cookie (configuration) ====
 +
 
 +
Stores some arbitrary data on the client, which persists between server transfers. The Notchian client only accepts cookies of up to 5 kiB in size.
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="2"| 0x0A
 
  | rowspan="2"| Configuration
 
  | rowspan="2"| Configuration
 
  | rowspan="2"| Client
 
  | rowspan="2"| Client
−
  | Total Features
+
  | colspan="2"| Key
−
  | VarInt
+
| colspan="2"| Identifier
−
  | Number of features that appear in the array below.
+
| The identifier of the cookie.
 +
|-
 +
| colspan="2"| Payload
 +
| colspan="2"| 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.
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
  |-
 +
| rowspan="2"| 0x0B
 +
| rowspan="2"| Configuration
 +
| rowspan="2"| Client
 +
| colspan="2"| Host
 +
| colspan="2"| String
 +
| The hostname of IP of the server.
 +
|-
 +
| colspan="2"| Port
 +
| colspan="2"| VarInt
 +
  | The port of the server.
 +
|}
 +
 
 +
==== Clientbound Known Packs ====
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="4"| 0x0E
 +
| rowspan="4"| Configuration
 +
| rowspan="4"| Client
 +
| colspan="2"| Known Pack Count
 +
| colspan="2"| VarInt
 +
| The number of known packs in the following array.
 +
|-
 +
| rowspan="3"| Known Packs
 +
| Namespace
 +
| rowspan="3"| Array
 +
| String
 +
|
 +
|-
 +
| ID
 +
| String
 +
|
 
  |-
 
  |-
−
  | Feature Flags
+
  | Version
−
  | Identifier Array
+
  | String
 
  |
 
  |
 
  |}
 
  |}
  
−
As of {{change|1.20.2|1.20.3}}, the following feature flags are available:
+
=== Serverbound ===
 +
 
 +
==== Cookie Response (configuration) ====
  
−
* minecraft:vanilla - enables vanilla features</li>
+
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.
−
* minecraft:bundle - enables support for the bundle</li>
+
 
−
* minecraft:trade_rebalance - enables support for the rebalanced villager trades</li>
+
{| class="wikitable" {{added}}
−
* {{change||minecraft:update_1_21 - enables support for 1.21 features}}</li>
+
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="4"| 0x01
 +
| rowspan="4"| Configuration
 +
| rowspan="4"| Server
 +
| colspan="2"| Key
 +
| colspan="2"| Identifier
 +
| The identifier of the cookie.
 +
|-
 +
| colspan="2"| Has Payload
 +
| colspan="2"| Boolean
 +
| The payload is only present if the cookie exists on the client.
 +
|-
 +
| colspan="2"| Payload Length
 +
| colspan="2"| VarInt
 +
| Length of the following byte array.
 +
|-
 +
| colspan="2"| Payload
 +
| colspan="2"| Optional Byte Array (5120)
 +
| The data of the cookie, if any.
 +
|}
  
−
=== Serverbound ===
+
==== Serverbound Known Packs ====
  
−
No changes so far.
+
ID 0x07, same structure as Clientbound Known Packs. If the client specifies a pack in this packet, the server should omit its contained data from Registry Data.
  
 
== Play ==
 
== Play ==
Line 993: Line 725:
 
=== Clientbound ===
 
=== Clientbound ===
  
−
==== Explosion ====
+
==== Cookie Request (play) ====
  
−
Sent when an explosion occurs (creepers, TNT, and ghast fireballs).
+
Requests a cookie that was previously stored.
  
−
Each block in Records is set to air. Coordinates for each axis in record is int(X) + record.x
+
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="1"| 0x16
 +
| rowspan="1"| Play
 +
| rowspan="1"| Client
 +
| colspan="2"| Key
 +
| colspan="2"| Identifier
 +
| The identifier of the cookie.
 +
|}
  
−
{{warning2|There is currently a disparity in the Notchian implementation between the data that is read from and written to the network. The write logic only serializes the particle id for the fields <code>Small explosion particle</code> and <code>Large explosion particle</code>, while the read logic expects the particle id and [[Protocol#Particle|extra required data]]. See [https://bugs.mojang.com/browse/MC-266537 MC-266537] for more information.}}
+
==== Debug Sample ====
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
|-
 +
| rowspan="3"| 0x1B
 +
| rowspan="3"| Play
 +
| rowspan="3"| Client
 +
| Sample Length
 +
| VarInt
 +
| The length of the following array.
 +
|-
 +
| Sample
 +
| Long Array
 +
| TODO: What is the structure of the data in this array?
 +
|-
 +
| Sample Type
 +
| VarInt Enum
 +
| The type of sample data. Currently always 0 (TICK_TIME).
 +
|}
 +
 
 +
==== Login (play) ====
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,005: Line 777:
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
−
  ! colspan="2" | Field Name
+
  ! Field Name
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="15"| 0x1E
+
  | rowspan="22"| 0x2B
−
  | rowspan="15"| Play
+
  | rowspan="22"| Play
−
  | rowspan="15"| Client
+
  | rowspan="22"| Client
−
  | colspan="2" | X
+
  | Entity ID
−
  | Double
+
| {{Type|Int}}
 +
| The player's Entity ID (EID).
 +
|-
 +
| Is hardcore
 +
  | {{Type|Boolean}}
 
  |
 
  |
 
  |-
 
  |-
−
  | colspan="2" | Y
+
  | Dimension Count
−
  | Double
+
| {{Type|VarInt}}
−
  |
+
| Size of the following array.
 +
|-
 +
| Dimension Names
 +
| {{Type|Array}} of {{Type|Identifier}}
 +
| Identifiers for all dimensions on the server.
 +
|-
 +
| Max Players
 +
| {{Type|VarInt}}
 +
| Was once used by the client to draw the player list, but now is ignored.
 +
|-
 +
| View Distance
 +
| {{Type|VarInt}}
 +
| Render distance (2-32).
 +
|-
 +
| Simulation Distance
 +
| {{Type|VarInt}}
 +
| The distance that the client will process specific things, such as entities.
 +
|-
 +
| Reduced Debug Info
 +
| {{Type|Boolean}}
 +
| If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
 +
|-
 +
| Enable respawn screen
 +
| {{Type|Boolean}}
 +
| Set to false when the doImmediateRespawn gamerule is true.
 +
|-
 +
| Do limited crafting
 +
| {{Type|Boolean}}
 +
| Whether players can only craft recipes they have already unlocked. Currently unused by the client.
 +
|-
 +
| Dimension Type
 +
| {{change|Identifier|VarInt}}
 +
| The ID of the type of dimension in the <code>minecraft:dimension_type</code> registry, defined by the Registry Data packet.
 +
|-
 +
| Dimension Name
 +
| {{Type|Identifier}}
 +
| Name of the dimension being spawned into.
 +
|-
 +
| Hashed seed
 +
| {{Type|Long}}
 +
| First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
 +
|-
 +
| Game mode
 +
| {{Type|Unsigned Byte}}
 +
| 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
 +
|-
 +
  | Previous Game mode
 +
  | {{Type|Byte}}
 +
| -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
 
  |-
 
  |-
−
  | colspan="2" | Z
+
  | Is Debug
−
  | Double
+
  | {{Type|Boolean}}
−
  |
+
  | True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
 
  |-
 
  |-
−
  | colspan="2" | Strength
+
  | Is Flat
−
| Float
+
  | {{Type|Boolean}}
−
  | {{change|A strength greater than or equal to 2.0 spawns a <code>minecraft:explosion_emitter</code> particle, while a lesser strength spawns a <code>minecraft:explosion</code> particle.}}
+
| 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.
−
{{change||If the strength is greater or equal to 2.0, or the block interaction is not 0 (keep), large explosion particles are used. Otherwise, small explosion particles are used.}}
 
 
  |-
 
  |-
−
  | colspan="2" | Record Count
+
  | Has death location
−
  | VarInt
+
  | {{Type|Boolean}}
−
  | Number of elements in the following array.
+
  | If true, then the next two fields are present.
 
  |-
 
  |-
−
  | colspan="2" | Records
+
  | Death dimension name
−
  | Array of (Byte, Byte, Byte)
+
  | {{Type|Optional}} {{Type|Identifier}}
−
  | Each record is 3 signed bytes long; the 3 bytes are the XYZ (respectively) signed offsets of affected blocks.
+
  | Name of the dimension the player died in.
 
  |-
 
  |-
−
  | colspan="2" | Player Motion X
+
  | Death location
−
  | Float
+
  | {{Type|Optional}} {{Type|Position}}
−
  | X velocity of the player being pushed by the explosion.
+
  | The location that the player died at.
 
  |-
 
  |-
−
  | colspan="2" | Player Motion Y
+
  | Portal cooldown
−
  | Float
+
  | {{Type|VarInt}}
−
  | Y velocity of the player being pushed by the explosion.
+
  | The number of ticks until the player can use the portal again.
 
  |-
 
  |-
−
  | colspan="2" | Player Motion Z
+
  | Enforces Secure Chat
−
| Float
+
  | {{Type|Boolean}}
−
  | Z velocity of the player being pushed by the explosion.
+
  |
−
|- {{added}}
 
−
| colspan="2" | Block interaction
 
−
| VarInt Enum
 
−
| 0 = keep, 1 = destroy, 2 = destroy_with_decay, 3 = trigger_block.
 
−
|- {{added}}
 
−
| colspan="2" | Small explosion particle
 
−
| VarInt
 
−
| The particle ID listed in [[#Particle|the particle data type]].
 
−
|- {{added}}
 
−
| colspan="2" | Large explosion particle
 
−
| VarInt
 
−
| The particle ID listed in [[#Particle|the particle data type]].
 
−
|- {{added}}
 
−
| rowspan="3" | Explosion sound
 
−
| Sound Name
 
−
| Identifier
 
−
| The name of the sound played.
 
−
|- {{added}}
 
−
| Has Fixed Range
 
−
| Optional Boolean
 
−
| Whether is has fixed range.
 
−
|- {{added}}
 
−
  | Range
 
−
| Optional Float
 
−
| The fixed range of the sound. Only present if previous boolean is true.
 
 
  |}
 
  |}
  
−
==== Game Event ====
+
==== Respawn ====
−
 
 
−
Used for a wide variety of game events, from weather to bed use to game mode to demo messages.
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 1,087: Line 883:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="2"| 0x20
+
| rowspan="12"| 0x47
 +
| rowspan="12"| Play
 +
| rowspan="12"| Client
 +
| Dimension Type
 +
| {{change|Identifier|VarInt}}
 +
| The ID of the type of dimension in the <code>minecraft:dimension_type</code> registry, defined by the [[Protocol#Registry_Data|Registry Data]] packet.
 +
|-
 +
| Dimension Name
 +
| {{Type|Identifier}}
 +
| Name of the dimension being spawned into.
 +
|-
 +
| Hashed seed
 +
| {{Type|Long}}
 +
| First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
 +
|-
 +
| Game mode
 +
| {{Type|Unsigned Byte}}
 +
| 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
 +
|-
 +
| Previous Game mode
 +
| {{Type|Byte}}
 +
| -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
 +
|-
 +
| Is Debug
 +
| {{Type|Boolean}}
 +
| True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
 +
|-
 +
| Is Flat
 +
| {{Type|Boolean}}
 +
| True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
 +
|-
 +
| Has death location
 +
| {{Type|Boolean}}
 +
| If true, then the next two fields are present.
 +
|-
 +
| Death dimension Name
 +
| {{Type|Optional}} {{Type|Identifier}}
 +
| Name of the dimension the player died in.
 +
|-
 +
| Death location
 +
| {{Type|Optional}} {{Type|Position}}
 +
| The location that the player died at.
 +
|-
 +
| Portal cooldown
 +
| {{Type|VarInt}}
 +
| The number of ticks until the player can use the portal again.
 +
|-
 +
| Data kept
 +
| {{Type|Byte}}
 +
| Bit mask. 0x01: Keep attributes, 0x02: Keep metadata. Tells which data should be kept on the client side once the player has respawned.
 +
In the Notchian implementation, this is context dependent:
 +
* normal respawns (after death) keep no data;
 +
* exiting the end poem/credits keeps the attributes;
 +
* other dimension changes (portals or teleports) keep all data.
 +
|}
 +
 
 +
==== Store Cookie (play) ====
 +
 
 +
Stores some arbitrary data on the client, which persists between server transfers. The Notchian client only accepts cookies of up to 5 kiB in size.
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="3"| 0x6B
 +
| rowspan="3"| Play
 +
| rowspan="3"| Client
 +
| colspan="2"| Key
 +
| colspan="2"| Identifier
 +
| The identifier of the cookie.
 +
|-
 +
| colspan="2"| Payload Length
 +
| colspan="2"| VarInt
 +
| Length of the following byte array.
 +
|-
 +
| colspan="2"| Payload
 +
| colspan="2"| Byte Array (5120)
 +
| The data of the cookie.
 +
|}
 +
 
 +
==== Transfer (play) ====
 +
 
 +
Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
 +
 
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
  | rowspan="2"| 0x73
 
  | rowspan="2"| Play
 
  | rowspan="2"| Play
 
  | rowspan="2"| Client
 
  | rowspan="2"| Client
−
  | Event
+
  | colspan="2"| Host
−
  | Unsigned Byte
+
| colspan="2"| String
 +
| The hostname of IP of the server.
 +
|-
 +
| colspan="2"| Port
 +
| colspan="2"| VarInt
 +
| The port of the server.
 +
|}
 +
 
 +
==== Update Attributes ====
 +
 
 +
Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
 +
 
 +
{| class="wikitable"
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="6"| 0x71
 +
| rowspan="6"| Play
 +
| rowspan="6"| Client
 +
  | colspan="2"| Entity ID
 +
| colspan="2"| VarInt
 +
|
 +
|-
 +
| colspan="2"| Number Of Properties
 +
| colspan="2"| VarInt
 +
| Number of elements in the following array.
 +
|-
 +
| rowspan="4"| Property
 +
| {{change|Key|Id}}
 +
| rowspan="4"| Array
 +
| {{change|Identifier|VarInt Enum}}
 
  | See below.
 
  | See below.
 
  |-
 
  |-
 
  | Value
 
  | Value
−
  | Float
+
  | Double
−
  | Depends on Event.
+
  | See below.
 +
|-
 +
| Number Of Modifiers
 +
| VarInt
 +
| Number of elements in the following array.
 +
|-
 +
| Modifiers
 +
| Array of Modifier Data
 +
| See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
 
  |}
 
  |}
  
−
''Events'':
+
Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
 +
 
 +
These changed between 24w03b and 24w13a, TODO: Update this
  
 
{| class="wikitable"
 
{| class="wikitable"
−
  ! Event
+
|-
−
  ! Effect
+
! Id
−
  ! Value
+
! Key
 +
! Default
 +
  ! Min
 +
  ! Max
 +
  ! Label
 
  |-
 
  |-
 
  | 0
 
  | 0
−
  | No respawn block available
+
  | generic.armor
−
  | Note: Displays message 'block.minecraft.spawn.not_valid' (You have no home bed or charged respawn anchor, or it was obstructed) to the player.
+
  | 0.0
 +
| 0.0
 +
| 30.0
 +
| Armor.
 
  |-
 
  |-
 
  | 1
 
  | 1
−
  | Begin raining
+
  | generic.armor_toughness
−
  |
+
  | 0.0
 +
| 0.0
 +
| 20.0
 +
| Armor Toughness.
 
  |-
 
  |-
 
  | 2
 
  | 2
−
  | End raining
+
  | generic.attack_damage
−
  |
+
  | 2.0
 +
| 0.0
 +
| 2048.0
 +
| Attack Damage.
 
  |-
 
  |-
 
  | 3
 
  | 3
−
  | Change game mode
+
  | generic.attack_knockback
−
  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
+
  | 0.0
 +
| 0.0
 +
| 5.0
 +
| Attack Knockback.
 
  |-
 
  |-
 
  | 4
 
  | 4
−
  | Win game
+
  | generic.attack_speed
−
  | 0: Just respawn player.<br>1: Roll the credits and respawn player.<br>Note that 1 is only sent by notchian server when player has not yet achieved advancement "The end?", else 0 is sent.
+
| 4.0
−
  |-
+
  | 0.0
 +
| 1024.0
 +
| Attack Speed.
 +
  |- {{added}}
 
  | 5
 
  | 5
−
  | Demo event
+
  | generic.block_interaction_range
−
  | 0: Show welcome to demo screen.<br>101: Tell movement controls.<br>102: Tell jump control.<br>103: Tell inventory control.<br>104: Tell that the demo is over and print a message about how to take a screenshot.
+
| 4.5
−
  |-
+
  | 0.0
 +
| 64.0
 +
| Block Interaction Range.
 +
  |- {{added}}
 
  | 6
 
  | 6
−
  | Arrow hit player
+
  | generic.entity_interaction_range
−
  | Note: Sent when any player is struck by an arrow.
+
  | 3.0
 +
| 0.0
 +
| 64.0
 +
| Entity Interaction Range.
 
  |-
 
  |-
 
  | 7
 
  | 7
−
  | Rain level change
+
  | generic.flying_speed
−
  | Note: Seems to change both sky color and lighting.<br>Rain level ranging from 0 to 1.
+
| 0.4
 +
  | 0.0
 +
| 1024.0
 +
| Flying Speed.
 
  |-
 
  |-
 
  | 8
 
  | 8
−
  | Thunder level change
+
  | generic.follow_range
−
  | Note: Seems to change both sky color and lighting (same as Rain level change, but doesn't start rain). It also requires rain to render by notchian client.<br>Thunder level ranging from 0 to 1.
+
  | 32.0
 +
| 0.0
 +
| 2048.0
 +
| Follow Range.
 
  |-
 
  |-
 
  | 9
 
  | 9
−
  | Play pufferfish sting sound
+
  | horse.jump_strength
 +
| 0.7
 +
| 0.0
 +
| 2.0
 +
| Jump Strength.
 
  |-
 
  |-
 
  | 10
 
  | 10
−
  | Play elder guardian mob appearance (effect and sound)
+
  | generic.knockback_resistance
−
  |
+
  | 0.0
 +
| 0.0
 +
| 1.0
 +
| Knockback Resistance.
 
  |-
 
  |-
 
  | 11
 
  | 11
−
  | Enable respawn screen
+
  | generic.luck
−
  |  0: Enable respawn screen.<br>1: Immediately respawn (sent when the <code>doImmediateRespawn</code> gamerule changes).
+
  | 0.0
 +
  | -1024.0
 +
| 1024.0
 +
| Luck.
 
  |-
 
  |-
 
  | 12
 
  | 12
−
  | Limited crafting
+
  | generic.max_absorption
−
  | 0: Disable limited crafting.<br>1: Enable limited crafting (sent when the <code>doLimitedCrafting</code> gamerule changes).
+
| 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.
 +
|- {{added}}
 +
| 15
 +
| generic.scale
 +
| 1.0
 +
| 0.0625
 +
| 16.0
 +
| Scale.
 +
|-
 +
| 16
 +
| zombie.spawn_reinforcements
 +
| 0.0
 +
| 0.0
 +
| 1.0
 +
| Spawn Reinforcements Chance.
 
  |- {{added}}
 
  |- {{added}}
−
  | 13
+
  | 17
−
  | Start waiting for level chunks
+
  | generic.step_height
−
  | Instructs the client to begin the waiting process for the level chunks.<br>Sent by the server after the level is cleared on the client and is being re-sent (either during the first, or subsequent reconfigurations).
+
| 0.6
 +
| 0.0
 +
  | 10.0
 +
| Step Height.
 
  |}
 
  |}
  
−
==== Set Ticking State ====
+
''Modifier Data'' structure:
  
−
Used to adjust the ticking rate of the client, and whether it's frozen.
+
{| class="wikitable"
−
 
+
  |-
−
{| class="wikitable" {{added}}
 
−
  ! Packet ID
 
−
! State
 
−
! Bound To
 
 
  ! Field Name
 
  ! Field Name
 
  ! Field Type
 
  ! Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="2" | 0x6C
+
  | UUID
−
| rowspan="2" | Play
+
  | UUID
−
| rowspan="2" | Server
 
−
| Tick rate
 
−
  | Float
 
 
  |
 
  |
 
  |-
 
  |-
−
  | Is frozen
+
  | Amount
−
  | Boolean
+
  | Double
−
  |
+
  | May be positive or negative.
 +
|-
 +
| Operation
 +
| Byte
 +
| See below.
 
  |}
 
  |}
  
−
==== Step Tick ====
+
The operation controls how the base value of the modifier is changed.
  
−
Advances the client processing by the specified number of ticks. Has no effect is the client ticking is not frozen.
+
* 0: Add/subtract amount
 +
* 1: Add/subtract amount percent of the current value
 +
* 2: Multiply by amount percent
  
−
{| class="wikitable" {{added}}
+
All of the 0's are applied first, and then the 1's, and then the 2's.
 +
 
 +
==== Entity Effect ====
 +
 
 +
{| class="wikitable"
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
Line 1,198: Line 1,212:
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | 0x6D
+
  | rowspan="7"| 0x72
−
  | Play
+
  | rowspan="7"| Play
−
  | Client
+
  | rowspan="7"| Client
−
  | Tick steps
+
  | Entity ID
 +
| VarInt
 +
|
 +
|-
 +
| Effect ID
 +
| VarInt
 +
| See {{Minecraft Wiki|Status effect#Effect list|this table}}.
 +
|-
 +
| Amplifier
 +
| Byte
 +
| Notchian client displays effect level as Amplifier + 1.
 +
|-
 +
| Duration
 
  | VarInt
 
  | VarInt
 +
| Duration in ticks. (-1 for infinite)
 +
|-
 +
| Flags
 +
| Byte
 +
| Bit field, see below.
 +
|- {{removed}}
 +
| Has Factor Data
 +
| Boolean
 +
| Used in DARKNESS effect
 +
|- {{removed}}
 +
| Factor Codec
 +
| NBT Tag
 +
| See below
 +
|}
 +
 +
{{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.}}
 +
 +
{{change|Factor Data|}}
 +
{| class="wikitable" {{removed}}
 +
!Name
 +
!Type
 +
!style="width: 250px;" colspan="2"| 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 ===
 
=== Serverbound ===
  
−
==== Change Container Slot State ====
+
==== Chat Command ====
  
−
This packet is sent by the client when toggling the state of a Crafter.
+
{| class="wikitable"
−
 
 
−
{| class="wikitable" {{added}}
 
 
  ! Packet ID
 
  ! Packet ID
 
  ! State
 
  ! State
 
  ! Bound To
 
  ! Bound To
−
  ! Field Name
+
  ! colspan="2"| Field Name
−
  ! Field Type
+
  ! colspan="2"| Field Type
 
  ! Notes
 
  ! Notes
 
  |-
 
  |-
−
  | rowspan="3"| 0x0F
+
  | rowspan="8"| 0x04
−
  | rowspan="3"| Play
+
  | rowspan="8"| Play
−
  | rowspan="3"| Server
+
  | rowspan="8"| Server
−
  | Slot ID
+
  | colspan="2"| Command
−
  | VarInt
+
  | colspan="2"| {{Type|String}} (256)
−
  | This is the ID of the slot that was changed.
+
  | colspan="2"| The command typed by the client.
−
  |-
+
|- {{removed}}
−
  | Window ID
+
| colspan="2"| Timestamp
−
  | VarInt
+
| colspan="2"| {{Type|Long}}
−
  | This is the ID of the window that was changed.
+
| colspan="2"| The timestamp that the command was executed.
−
  |-
+
|- {{removed}}
−
  | State
+
| colspan="2"| Salt
−
  | Boolean
+
| colspan="2"| {{Type|Long}}
−
  | The new state of the slot. True for enabled, false for disabled.
+
| colspan="2"| The salt for the following argument signatures.
 +
  |- {{removed}}
 +
  | colspan="2"| Array length
 +
  | colspan="2"| {{Type|VarInt}}
 +
  | colspan="2"| Number of entries in the following array. The maximum length in Notchian server is 8.
 +
|- {{removed}}
 +
| rowspan="2"| Array of argument signatures
 +
| Argument name
 +
| rowspan="2"| {{Type|Array}} (8)
 +
| {{Type|String}} (16)
 +
| The name of the argument that is signed by the following signature.
 +
  |- {{removed}}
 +
  | Signature
 +
  | {{Type|Byte Array}} (256)
 +
  | The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
 +
|- {{removed}}
 +
| colspan="2"| Message Count
 +
| colspan="2"| {{Type|VarInt}}
 +
| colspan="2"|
 +
|- {{removed}}
 +
| colspan="2"| Acknowledged
 +
| colspan="2"| {{Type|Fixed BitSet}} (20)
 +
| colspan="2"|
 
  |}
 
  |}
  
−
==== Program Jigsaw Block ====
 
  
−
Sent when Done is pressed on the {{Minecraft Wiki|Jigsaw Block}} interface.
+
==== Signed Chat Command ====
  
−
{| 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="8"| 0x2F
+
  | rowspan="8"| 0x05
 
  | rowspan="8"| Play
 
  | rowspan="8"| Play
 
  | rowspan="8"| Server
 
  | rowspan="8"| Server
−
  | Location
+
  | colspan="2"| Command
−
  | Position
+
  | colspan="2"| String(256)
−
  | Block entity location
+
  | The command typed by the client.
 
  |-
 
  |-
 +
| colspan="2"| Timestamp
 +
| colspan="2"| Long
 +
| The timestamp that the command was executed. Milliseconds since the Unix epoch.
 +
|-
 +
| colspan="2"| Salt
 +
| colspan="2"| Long
 +
| The salt for the following argument signatures.
 +
|-
 +
| colspan="2"| Argument Signature Count
 +
| colspan="2"| VarInt
 +
| Number of elements in the following array. The maximum length in Notchian server is 8.
 +
|-
 +
| rowspan="2"| Argument Signatures
 
  | Name
 
  | Name
−
  | Identifier
+
  | rowspan="2"| Array
 +
| String(16)
 +
| The name of the argument that is signed by the following signature.
 +
|-
 +
| Signature
 +
| ByteArray(256)
 +
| The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
 +
|-
 +
| colspan="2"| Seen Messages Offset
 +
| colspan="2"| VarInt
 
  |
 
  |
 
  |-
 
  |-
−
  | Target
+
  | colspan="2"| Seen Messages Acknowledged
−
  | Identifier
+
  | colspan="2"| Fixed BitSet(20)
 
  |
 
  |
 +
|}
 +
 +
==== Cookie Response (play) ====
 +
 +
Response to a [[#Cookie_Request_(play)|Cookie Request (play)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
 +
 +
{| class="wikitable" {{added}}
 +
! Packet ID
 +
! State
 +
! Bound To
 +
! colspan="2"| Field Name
 +
! colspan="2"| Field Type
 +
! Notes
 +
|-
 +
| rowspan="4"| 0x11
 +
| rowspan="4"| Play
 +
| rowspan="4"| Server
 +
| colspan="2"| Key
 +
| colspan="2"| Identifier
 +
| The identifier of the cookie.
 
  |-
 
  |-
−
  | Pool
+
  | colspan="2"| Has Payload
−
  | Identifier
+
  | colspan="2"| Boolean
−
  |
+
  | The payload is only present if the cookie exists on the client.
 
  |-
 
  |-
−
  | Final state
+
  | colspan="2"| Payload Length
−
  | String (32767)
+
  | colspan="2"| Optional VarInt
−
  | "Turns into" on the GUI, <code>final_state</code> in NBT.
+
  | Length of the following byte array.
 
  |-
 
  |-
−
  | Joint type
+
  | colspan="2"| Payload
−
  | String (32767)
+
  | colspan="2"| Optional Byte Array (5120)
−
  | <code>rollable</code> if the attached piece can be rotated, else <code>aligned</code>.
+
  | The data of the cookie, if any.
−
  |- {{added}}
+
  |}
−
  | Selection priority
+
 
−
  | VarInt
+
==== Debug Sample Subscription ====
−
  |
+
 
−
  |- {{added}}
+
{| class="wikitable" {{added}}
−
  | Placement priority
+
! Packet ID
−
  | VarInt
+
! State
−
  |
+
! Bound To
 +
! Field Name
 +
! Field Type
 +
! Notes
 +
  |-
 +
  | 0x13
 +
  | Play
 +
  | Server
 +
  | Sample Type
 +
  | VarInt Enum
 +
  | The type of debug sample to subscribe to. Currently always 0 (TICK_TIME).
 
  |}
 
  |}
  
 
[[Category:Minecraft Modern]]
 
[[Category:Minecraft Modern]]

Revision as of 22:19, 9 April 2024

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

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

Contents

Data types

No changes so far.

Packets

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

New/modified data types

No changes so far.

Entity Metadata

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

Living Entity

TODO: This has changed to use the PARTICLES attribute

Wolf

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

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

Armadillo

Extends Animal.

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

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Handshake

Serverbound

Handshake

This causes the server to switch into the target state.

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

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

Encryption Request

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

Cookie Request (login)

Requests a cookie that was previously stored.

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

Serverbound

Cookie Response (login)

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

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

Configuration

Clientbound

Cookie Request (configuration)

Requests a cookie that was previously stored.

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

Reset Chat

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

Registry Data

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

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

Store Cookie (configuration)

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

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

Transfer (configuration)

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

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

Clientbound Known Packs

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

Serverbound

Cookie Response (configuration)

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

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

Serverbound Known Packs

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

Play

Clientbound

Cookie Request (play)

Requests a cookie that was previously stored.

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

Debug Sample

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

Login (play)

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

Respawn

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

In the Notchian implementation, this is context dependent:

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

Store Cookie (play)

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

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

Transfer (play)

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

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

Update Attributes

Sets attributes on the given entity.

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

Known Key values (see also Attribute#Modifiers):

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

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

Modifier Data structure:

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

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

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

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

Entity Effect

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

Within flags:

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

Factor Data

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

Serverbound

Chat Command

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


Signed Chat Command

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

Cookie Response (play)

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

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

Debug Sample Subscription

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