Set Structure Block

Play 0x3B, client → server.

play · 0x3B · serverbound (client → server)

Sent when the player interacts with a structure block GUI. action is update data, save, load, or detect size; mode, name, offsets, sizes, mirror, rotation, metadata, integrity, and seed are the new settings. Operator-only; the server updates the block entity and runs the action.

Sent by the client, read by the server. Listen for it with client.on("SetStructureBlock", (data) => …) on the receiving side.

Fields

Field	Type	Notes
`location`	Position	also `position`
`action`	VarInt
`mode`	VarInt
`name`	String
`offset_x`	Byte
`offset_y`	Byte
`offset_z`	Byte
`size_x`	Byte
`size_y`	Byte
`size_z`	Byte
`mirror`	VarInt
`rotation`	VarInt
`metadata`	String
`integrity`	Float
`seed`	VarInt
`flags`	UByte	Enum: `0` ignore_entities, `1` show_air, `2` show_bounding_box, `3` strict.

Send it

await client.sendPacket("SetStructureBlock", {
  location: /* Position */,
  action: /* VarInt */,
  mode: /* VarInt */,
  name: /* String */,
  offset_x: /* Byte */,
  offset_y: /* Byte */,
  offset_z: /* Byte */,
  size_x: /* Byte */,
  size_y: /* Byte */,
  size_z: /* Byte */,
  mirror: /* VarInt */,
  rotation: /* VarInt */,
  metadata: /* String */,
  integrity: /* Float */,
  seed: /* VarInt */,
  flags: /* UByte */,
});

Field aliases listed under Notes are accepted as alternative keys when writing.

Source: src/Core/Versions/776/Packets/play/serverbound/SetStructureBlock.ts