bedrock-protocol-docs/previous_changelogs/changelog_434_3_29_21.md

Minecraft Network Protocol Docs 3/16/21

For 16u6-beta-2, Network Protocol Version 434. (Note: we never made docs for beta-1)

Packet Changes

StartGamePacket:

• new field: Server Version - is a string. You can pass whatever you want here; it would be useful for our telemetry if you passed a version code that included the name of your server, frex: "OurSweetServer 12.23.01"

New Packet

SyncActorPropertyPacket: This is intended to some day (could be years, ngl) replace Synched Actor data. It's currently in a first-draft state and we don't expect any of the server partners to use it yet. The gist is it contains a compound tag that has a 'type' (the actor name hash ID) and a 'properties' which is the Actor properties that are flagged for client replication.

Enum Changes

ActorDataIDs:

• Changed UPDATE_PROPERTIES from 125 to 120
• Changed FREEZING_EFFECT_STRENGTH from 120 to 121
• Changed BUOYANCY_DATA from 121 to 122
• Changed GOAT_HORN_COUNT from 122 to 123
• Changed BASE_RUNTIME_ID from 123 to 124
• Removed DEFINE_PROPERTIES

ActorFlags:

• Added PLAYING_DEAD(97)
• Displaced Count

ActorType:

• Added Axolotl(130 | Animal)

CommandPermissionLevel:

• Added GameDirectors(1)
• Removed GameMasters

MinecraftPacketIds:

• Added SyncActorProperty(165)
• Displaced EndId

Doc Improvements

• Fixed incorrect User Instance Data type: now that it's sent within a string by the Item Network types it's ints rather than varints.
• Fixed incorrect byte-size specs for varints on the types page (and removed incorrect specs for how to send a varint, since y'all are doing it the right way anyhow.)