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| | + | 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|23w43b, protocol {{Snapshot PVN|1073741984}}]]). 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. |
Revision as of 18:43, 27 October 2023
This page documents the changes from the last stable Minecraft release (currently 1.20.2, protocol 764) to the current pre-release (currently 23w43b, protocol Snapshot 160). 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
NBT
The NBT specification was changed so that the root tag is no longer required to be a Compound Tag when sent over the network.
Presently in the pre-release, only Compound Tag and String Tag types are used as root, but the Notchian server/client implementation is able to handle NBT Tags of any type.
Chat
The Chat type is now serialized as a NBT Tag instead of a JSON String, unless explicitly stated otherwise.
Name | Size (bytes) | Encodes | Notes |
---|---|---|---|
Chat | ≥ 1 ≤ (262144×4) + 3 |
See Chat | Encoded as a String with max length of 262144. |
Chat | Varies | See Chat | Encoded as a NBT Tag, with the type of tag used depending on the case:
|
This affects the following packets and data types containing Chat fields:
- Disconnect (configuration)
- Resource Pack (configuration)
- Boss Bar
- Command Suggestions Response
- Disconnect (play)
- Disguised Chat Message
- Map Data
- Open Screen
- Player Chat Message
- Combat Death
- Player Info Update
- Resource Pack (play)
- Server Data
- Set Action Bar Text
- Update Objectives
- Update Teams
- Set Subtitle Text
- Set Title Text
- System Chat Message
- Set Tab List Header And Footer
- Update Advancements
- Slot data type (values in the item NBT field)
- Chat entity metadata type
- OptChat entity metadata type
However, the following are NOT affected, as to maintain backwards compatibility with older versions:
Particle
Particle Name | Particle ID | Data | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
minecraft:ambient_entity_effect
|
0 | None | ||||||||||||||||||||||||
minecraft:angry_villager
|
1 | None | ||||||||||||||||||||||||
minecraft:block
|
2 |
| ||||||||||||||||||||||||
minecraft:block_marker
|
3 |
| ||||||||||||||||||||||||
minecraft:bubble
|
4 | None | ||||||||||||||||||||||||
minecraft:cloud
|
5 | None | ||||||||||||||||||||||||
minecraft:crit
|
6 | None | ||||||||||||||||||||||||
minecraft:damage_indicator
|
7 | None | ||||||||||||||||||||||||
minecraft:dragon_breath
|
8 | None | ||||||||||||||||||||||||
minecraft:dripping_lava
|
9 | None | ||||||||||||||||||||||||
minecraft:falling_lava
|
10 | None | ||||||||||||||||||||||||
minecraft:landing_lava
|
11 | None | ||||||||||||||||||||||||
minecraft:dripping_water
|
12 | None | ||||||||||||||||||||||||
minecraft:falling_water
|
13 | None | ||||||||||||||||||||||||
minecraft:dust
|
14 |
| ||||||||||||||||||||||||
minecraft:dust_color_transition
|
15 |
| ||||||||||||||||||||||||
minecraft:effect
|
16 | None | ||||||||||||||||||||||||
minecraft:elder_guardian
|
17 | None | ||||||||||||||||||||||||
minecraft:enchanted_hit
|
18 | None | ||||||||||||||||||||||||
minecraft:enchant
|
19 | None | ||||||||||||||||||||||||
minecraft:end_rod
|
20 | None | ||||||||||||||||||||||||
minecraft:entity_effect
|
21 | None | ||||||||||||||||||||||||
minecraft:explosion_emitter
|
22 | None | ||||||||||||||||||||||||
minecraft:explosion
|
23 | None | ||||||||||||||||||||||||
minecraft:sonic_boom
|
24 | None | ||||||||||||||||||||||||
minecraft:falling_dust
|
25 |
| ||||||||||||||||||||||||
minecraft:firework
|
26 | None | ||||||||||||||||||||||||
minecraft:fishing
|
27 | None | ||||||||||||||||||||||||
minecraft:flame
|
28 | None | ||||||||||||||||||||||||
minecraft:cherry_leaves
|
29 | None | ||||||||||||||||||||||||
minecraft:sculk_soul
|
30 | None | ||||||||||||||||||||||||
minecraft:sculk_charge
|
31 |
| ||||||||||||||||||||||||
minecraft:sculk_charge_pop
|
32 | None | ||||||||||||||||||||||||
minecraft:soul_fire_flame
|
33 | None | ||||||||||||||||||||||||
minecraft:soul
|
34 | None | ||||||||||||||||||||||||
minecraft:flash
|
35 | None | ||||||||||||||||||||||||
minecraft:happy_villager
|
36 | None | ||||||||||||||||||||||||
minecraft:composter
|
37 | None | ||||||||||||||||||||||||
minecraft:heart
|
38 | None | ||||||||||||||||||||||||
minecraft:instant_effect
|
39 | None | ||||||||||||||||||||||||
minecraft:item
|
40 |
| ||||||||||||||||||||||||
minecraft:vibration
|
41 |
| ||||||||||||||||||||||||
minecraft:item_slime
|
42 | None | ||||||||||||||||||||||||
minecraft:item_snowball
|
43 | None | ||||||||||||||||||||||||
minecraft:large_smoke
|
44 | None | ||||||||||||||||||||||||
minecraft:lava
|
45 | None | ||||||||||||||||||||||||
minecraft:mycelium
|
46 | None | ||||||||||||||||||||||||
minecraft:note
|
47 | None | ||||||||||||||||||||||||
minecraft:poof
|
48 | None | ||||||||||||||||||||||||
minecraft:portal
|
49 | None | ||||||||||||||||||||||||
minecraft:rain
|
50 | None | ||||||||||||||||||||||||
minecraft:smoke
|
51 | None | ||||||||||||||||||||||||
minecraft:white_smoke
|
52 | None | ||||||||||||||||||||||||
minecraft:sneeze
|
None | |||||||||||||||||||||||||
minecraft:spit
|
None | |||||||||||||||||||||||||
minecraft:squid_ink
|
None | |||||||||||||||||||||||||
minecraft:sweep_attack
|
None | |||||||||||||||||||||||||
minecraft:totem_of_undying
|
None | |||||||||||||||||||||||||
minecraft:underwater
|
None | |||||||||||||||||||||||||
minecraft:splash
|
None | |||||||||||||||||||||||||
minecraft:witch
|
None | |||||||||||||||||||||||||
minecraft:bubble_pop
|
None | |||||||||||||||||||||||||
minecraft:current_down
|
None | |||||||||||||||||||||||||
minecraft:bubble_column_up
|
None | |||||||||||||||||||||||||
minecraft:nautilus
|
None | |||||||||||||||||||||||||
minecraft:dolphin
|
None | |||||||||||||||||||||||||
minecraft:campfire_cosy_smoke
|
None | |||||||||||||||||||||||||
minecraft:campfire_signal_smoke
|
None | |||||||||||||||||||||||||
minecraft:dripping_honey
|
None | |||||||||||||||||||||||||
minecraft:falling_honey
|
None | |||||||||||||||||||||||||
minecraft:landing_honey
|
None | |||||||||||||||||||||||||
minecraft:falling_nectar
|
None | |||||||||||||||||||||||||
minecraft:falling_spore_blossom
|
None | |||||||||||||||||||||||||
minecraft:ash
|
None | |||||||||||||||||||||||||
minecraft:crimson_spore
|
None | |||||||||||||||||||||||||
minecraft:warped_spore
|
None | |||||||||||||||||||||||||
minecraft:spore_blossom_air
|
None | |||||||||||||||||||||||||
minecraft:dripping_obsidian_tear
|
None | |||||||||||||||||||||||||
minecraft:falling_obsidian_tear
|
None | |||||||||||||||||||||||||
minecraft:landing_obsidian_tear
|
None | |||||||||||||||||||||||||
minecraft:reverse_portal
|
None | |||||||||||||||||||||||||
minecraft:white_ash
|
None | |||||||||||||||||||||||||
minecraft:small_flame
|
None | |||||||||||||||||||||||||
minecraft:snowflake
|
None | |||||||||||||||||||||||||
minecraft:dripping_dripstone_lava
|
None | |||||||||||||||||||||||||
minecraft:falling_dripstone_lava
|
None | |||||||||||||||||||||||||
minecraft:dripping_dripstone_water
|
None | |||||||||||||||||||||||||
minecraft:falling_dripstone_water
|
None | |||||||||||||||||||||||||
minecraft:glow_squid_ink
|
None | |||||||||||||||||||||||||
minecraft:glow
|
None | |||||||||||||||||||||||||
minecraft:wax_on
|
None | |||||||||||||||||||||||||
minecraft:wax_off
|
None | |||||||||||||||||||||||||
minecraft:electric_spark
|
None | |||||||||||||||||||||||||
minecraft:scrape
|
None | |||||||||||||||||||||||||
minecraft:shriek
|
| |||||||||||||||||||||||||
minecraft:egg_crack
|
None | |||||||||||||||||||||||||
minecraft:dust_plume
|
96 | None |
Packets
ID | Packet name | Documentation | |
---|---|---|---|
Configuration clientbound | |||
0x07 | Feature Flags | Current | Pre |
Play clientbound | |||
0x20 | Game Event | Current | Pre |
0x6C | Set Ticking State | Pre | |
0x6D | Step Tick | Pre | |
Update Advancements | Current | (unchanged) | |
Update Attributes | Current | (unchanged) | |
Entity Effect | Current | (unchanged) | |
Update Recipes | Current | (unchanged) | |
Update Tags | Current | (unchanged) | |
Play serverbound | |||
0x0F | Change Container Slot State | Pre | |
Serverbound Plugin Message (play) | Current | (unchanged) | |
Edit Book | Current | (unchanged) | |
Query Entity Tag | Current | (unchanged) | |
Interact | Current | (unchanged) | |
Jigsaw Generate | Current | (unchanged) | |
Serverbound Keep Alive (play) | Current | (unchanged) | |
Lock Difficulty | Current | (unchanged) | |
Set Player Position | Current | (unchanged) | |
Set Player Position and Rotation | Current | (unchanged) | |
Set Player Rotation | Current | (unchanged) | |
Set Player On Ground | Current | (unchanged) | |
Move Vehicle | Current | (unchanged) | |
Paddle Boat | Current | (unchanged) | |
Pick Item | Current | (unchanged) | |
Ping Request (play) | Current | (unchanged) | |
Place Recipe | Current | (unchanged) | |
Player Abilities | Current | (unchanged) | |
Player Action | Current | (unchanged) | |
Player Command | Current | (unchanged) | |
Player Input | Current | (unchanged) | |
Pong (play) | Current | (unchanged) | |
Change Recipe Book Settings | Current | (unchanged) | |
Set Seen Recipe | Current | (unchanged) | |
Rename Item | Current | (unchanged) | |
Resource Pack Response (play) | Current | (unchanged) | |
Seen Advancements | Current | (unchanged) | |
Select Trade | Current | (unchanged) | |
Set Beacon Effect | Current | (unchanged) | |
Set Held Item | Current | (unchanged) | |
Program Command Block | Current | (unchanged) | |
Program Command Block Minecart | Current | (unchanged) | |
Set Creative Mode Slot | Current | (unchanged) | |
Program Jigsaw Block | Current | Pre | |
Program Structure Block | Current | (unchanged) | |
Update Sign | Current | (unchanged) | |
Swing Arm | Current | (unchanged) | |
Teleport To Entity | Current | (unchanged) | |
Use Item On | Current | (unchanged) | |
Use Item | Current | (unchanged) |
New/modified data types
No changes so far.
Entity Metadata
Abstract Vehicle
Extends Entity.
Index | Type | Meaning | Default | |
---|---|---|---|---|
8 | VarInt | Shaking power | 0 | |
9 | VarInt | Shaking direction | 1 | |
10 | Float | Shaking multiplier | 0.0 |
Abstract Minecart
Extends Abstract Vehicle.
Index | Type | Meaning | Default | |
---|---|---|---|---|
8 | VarInt | Shaking power | 0 | |
9 | VarInt | Shaking direction | 1 | |
10 | Float | Shaking multiplier | 0.0 | |
11 | VarInt | Custom block ID and damage | 0 | |
12 | VarInt | Custom block Y position (in 16ths of a block) | 6 | |
13 | Boolean | Show custom block | false |
Boat
Extends Abstract Vehicle.
Index | Type | Meaning | Default | |
---|---|---|---|---|
8 | VarInt | Time since last hit | 0 | |
9 | VarInt | Forward direction | 1 | |
10 | Float | Damage taken | 0.0 | |
11 | VarInt | Type (0=oak, 1=spruce, 2=birch, 3=jungle, 4=acacia, 5=dark oak) | 0 | |
12 | Boolean | Is left paddle turning | false | |
13 | Boolean | Is right paddle turning | false | |
14 | VarInt | Splash timer | 0 |
Block Actions
No changes so far.
Inventories
No changes so far.
Plugin Channels
No changes so far.
Status
Clientbound
No changes so far.
Serverbound
No changes so far.
Login
Clientbound
No changes so far.
Serverbound
No changes so far.
Configuration
Clientbound
Feature Flags
Used to enable and disable features, generally experimental ones, on the client.
Packet ID | State | Bound To | Field Name | Field Type | Notes |
---|---|---|---|---|---|
0x07 | Configuration | Client | Total Features | VarInt | Number of features that appear in the array below. |
Feature Flags | Identifier Array |
As of 1.20.2 1.20.3, the following feature flags are available:
- minecraft:vanilla - enables vanilla features
- minecraft:bundle - enables support for the bundle
- minecraft:trade_rebalance - enables support for the rebalanced villager trades
- minecraft:update_1_21 - enables support for 1.21 features
Serverbound
No changes so far.
Play
Clientbound
Game Event
Used for a wide variety of game events, from weather to bed use to game mode to demo messages.
Packet ID | State | Bound To | Field Name | Field Type | Notes |
---|---|---|---|---|---|
0x20 | Play | Client | Event | Unsigned Byte | See below. |
Value | Float | Depends on Event. |
Events:
Event | Effect | Value |
---|---|---|
0 | No respawn block available | Note: Displays message 'block.minecraft.spawn.not_valid' (You have no home bed or charged respawn anchor, or it was obstructed) to the player. |
1 | Begin raining | |
2 | End raining | |
3 | Change game mode | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. |
4 | Win game | 0: Just respawn player. 1: Roll the credits and respawn player. Note that 1 is only sent by notchian server when player has not yet achieved advancement "The end?", else 0 is sent. |
5 | Demo event | 0: Show welcome to demo screen. 101: Tell movement controls. 102: Tell jump control. 103: Tell inventory control. 104: Tell that the demo is over and print a message about how to take a screenshot. |
6 | Arrow hit player | Note: Sent when any player is struck by an arrow. |
7 | Rain level change | Note: Seems to change both sky color and lighting. Rain level ranging from 0 to 1. |
8 | Thunder level change | 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. Thunder level ranging from 0 to 1. |
9 | Play pufferfish sting sound | |
10 | Play elder guardian mob appearance (effect and sound) | |
11 | Enable respawn screen | 0: Enable respawn screen. 1: Immediately respawn (sent when the doImmediateRespawn gamerule changes).
|
12 | Limited crafting | 0: Disable limited crafting. 1: Enable limited crafting (sent when the doLimitedCrafting gamerule changes).
|
13 | Start waiting for level chunks | Instructs the client to begin the waiting process for the level chunks. Sent by the server after the level is cleared on the client and is being re-sent (either during the first, or subsequent reconfigurations). |
Set Ticking State
Used to adjust the ticking rate of the client, and whether it's frozen.
Packet ID | State | Bound To | Field Name | Field Type | Notes |
---|---|---|---|---|---|
0x6C | Play | Server | Tick rate | Float | |
Is frozen | Boolean |
Step Tick
Advances the client processing by the specified number of ticks. Has no effect is the client ticking is not frozen.
Packet ID | State | Bound To | Field Name | Field Type | Notes |
---|---|---|---|---|---|
0x6D | Play | Client | Tick steps | VarInt |
Serverbound
Change Container Slot State
This packet is sent by the client when toggling the state of a Crafter.
Packet ID | State | Bound To | Field Name | Field Type | Notes |
---|---|---|---|---|---|
0x0F | Play | Server | Slot ID | VarInt | This is the ID of the slot that was changed. |
Window ID | VarInt | This is the ID of the window that was changed. | |||
State | Boolean | The new state of the slot. True for enabled, false for disabled. |
Program Jigsaw Block
Sent when Done is pressed on the Jigsaw Block interface.
Packet ID | State | Bound To | Field Name | Field Type | Notes |
---|---|---|---|---|---|
0x2F | Play | Server | Location | Position | Block entity location |
Name | Identifier | ||||
Target | Identifier | ||||
Pool | Identifier | ||||
Final state | String (32767) | "Turns into" on the GUI, final_state in NBT.
| |||
Joint type | String (32767) | rollable if the attached piece can be rotated, else aligned .
| |||
Selection priority | VarInt | ||||
Placement priority | VarInt |