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[WIP] 1.21.9 support #214

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4f08645
Throw proper exception then getting item id for an unsupported version
UserNugget Jun 30, 2025
5b4262e
Initial 1.21.9 support
UserNugget Sep 30, 2025
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3 changes: 2 additions & 1 deletion api/src/main/java/net/elytrium/limboapi/api/chunk/BlockEntityVersion.java
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Original file line number Diff line number Diff line change
Expand Up @@ -30,7 +30,8 @@ public enum BlockEntityVersion {
MINECRAFT_1_21_4(EnumSet.of(ProtocolVersion.MINECRAFT_1_21_4)),
MINECRAFT_1_21_5(EnumSet.of(ProtocolVersion.MINECRAFT_1_21_5)),
MINECRAFT_1_21_6(EnumSet.of(ProtocolVersion.MINECRAFT_1_21_6)),
MINECRAFT_1_21_7(EnumSet.of(ProtocolVersion.MINECRAFT_1_21_7));
MINECRAFT_1_21_7(EnumSet.of(ProtocolVersion.MINECRAFT_1_21_7)),
MINECRAFT_1_21_9(EnumSet.of(ProtocolVersion.MINECRAFT_1_21_9));

private static final EnumMap<ProtocolVersion, BlockEntityVersion> MC_VERSION_TO_ITEM_VERSIONS = new EnumMap<>(ProtocolVersion.class);
private static final Map<String, BlockEntityVersion> KEY_LOOKUP = Map.copyOf(EnumUniverse.createProtocolLookup(values()));
Expand Down
3 changes: 2 additions & 1 deletion api/src/main/java/net/elytrium/limboapi/api/material/WorldVersion.java
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Expand Up @@ -34,7 +34,8 @@ public enum WorldVersion {
MINECRAFT_1_21_4(ProtocolVersion.MINECRAFT_1_21_4),
MINECRAFT_1_21_5(ProtocolVersion.MINECRAFT_1_21_5),
MINECRAFT_1_21_6(ProtocolVersion.MINECRAFT_1_21_6),
MINECRAFT_1_21_7(EnumSet.range(ProtocolVersion.MINECRAFT_1_21_7, ProtocolVersion.MAXIMUM_VERSION));
MINECRAFT_1_21_7(ProtocolVersion.MINECRAFT_1_21_7),
MINECRAFT_1_21_9(EnumSet.range(ProtocolVersion.MINECRAFT_1_21_9, ProtocolVersion.MAXIMUM_VERSION));

private static final EnumMap<ProtocolVersion, WorldVersion> MC_VERSION_TO_ITEM_VERSIONS = new EnumMap<>(ProtocolVersion.class);
private static final Map<String, WorldVersion> KEY_LOOKUP = Map.copyOf(EnumUniverse.createProtocolLookup(values()));
Expand Down
2 changes: 2 additions & 0 deletions api/src/main/java/net/elytrium/limboapi/api/protocol/packets/PacketFactory.java
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Expand Up @@ -32,6 +32,8 @@ public interface PacketFactory {

Object createDefaultSpawnPositionPacket(int posX, int posY, int posZ, float angle);

Object createDefaultSpawnPositionPacket(String dimension, int posX, int posY, int posZ, float yaw, float pitch);

Object createMapDataPacket(int mapID, byte scale, MapData mapData);

/**
Expand Down
10 changes: 7 additions & 3 deletions plugin/build.gradle
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Expand Up @@ -133,7 +133,8 @@ enum MinecraftVersion {
MINECRAFT_1_21_4(769),
MINECRAFT_1_21_5(770),
MINECRAFT_1_21_6(771),
MINECRAFT_1_21_7(772)
MINECRAFT_1_21_7(772),
MINECRAFT_1_21_9(773)

public static final List<MinecraftVersion> WORLD_VERSIONS = List.of(
MINECRAFT_1_13,
Expand All @@ -153,7 +154,8 @@ enum MinecraftVersion {
MINECRAFT_1_21_4,
MINECRAFT_1_21_5,
MINECRAFT_1_21_6,
MINECRAFT_1_21_7
MINECRAFT_1_21_7,
MINECRAFT_1_21_9
)

public static final MinecraftVersion MINIMUM_VERSION = MINECRAFT_1_7_2
Expand Down Expand Up @@ -212,7 +214,9 @@ File downloadVersionManifest(String version) {
this.println("> Downloading ${version} manifest...")

Object manifest = new JsonSlurper().parse(versionManifestFile)
def optional = manifest.versions.stream().filter({ it.id == version }).findFirst()

// TODO: remove
def optional = manifest.versions.stream().filter({ version == "1.21.9" ? it.id == version + "-rc1" : it.id == version }).findFirst()
if (optional.empty()) {
throw new RuntimeException("Couldn't find version: ${version}")
}
Expand Down
64 changes: 64 additions & 0 deletions plugin/mapping/fallbackdata.json
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@@ -1,4 +1,68 @@
{
"MINECRAFT_1_21_7": {
"minecraft:acacia_shelf": "minecraft:acacia_planks",
"minecraft:bamboo_shelf": "minecraft:bamboo_planks",
"minecraft:birch_shelf": "minecraft:birch_planks",
"minecraft:cherry_shelf": "minecraft:cherry_planks",
"minecraft:crimson_shelf": "minecraft:crimson_planks",
"minecraft:dark_oak_shelf": "minecraft:dark_oak_planks",
"minecraft:jungle_shelf": "minecraft:jungle_planks",
"minecraft:mangrove_shelf": "minecraft:mangrove_planks",
"minecraft:oak_shelf": "minecraft:oak_planks",
"minecraft:pale_oak_shelf": "minecraft:oak_planks",
"minecraft:spruce_shelf": "minecraft:spruce_planks",
"minecraft:warped_shelf": "minecraft:warped_planks",
"minecraft:copper_chest": "minecraft:chest",
"minecraft:exposed_copper_chest": "minecraft:chest",
"minecraft:weathered_copper_chest": "minecraft:chest",
"minecraft:oxidized_copper_chest": "minecraft:chest",
"minecraft:waxed_copper_chest": "minecraft:chest",
"minecraft:waxed_exposed_copper_chest": "minecraft:chest",
"minecraft:waxed_weathered_copper_chest": "minecraft:chest",
"minecraft:waxed_oxidized_copper_chest": "minecraft:chest",
"minecraft:copper_golem_statue": "minecraft:copper_block",
"minecraft:exposed_copper_golem_statue": "minecraft:copper_block",
"minecraft:weathered_copper_golem_statue": "minecraft:copper_block",
"minecraft:oxidized_copper_golem_statue": "minecraft:copper_block",
"minecraft:waxed_copper_golem_statue": "minecraft:copper_block",
"minecraft:waxed_exposed_copper_golem_statue": "minecraft:copper_block",
"minecraft:waxed_weathered_copper_golem_statue": "minecraft:copper_block",
"minecraft:waxed_oxidized_copper_golem_statue": "minecraft:copper_block",
"minecraft:exposed_lightning_rod": "minecraft:lightning_rod",
"minecraft:weathered_lightning_rod": "minecraft:lightning_rod",
"minecraft:oxidized_lightning_rod": "minecraft:lightning_rod",
"minecraft:waxed_lightning_rod": "minecraft:lightning_rod",
"minecraft:waxed_exposed_lightning_rod": "minecraft:lightning_rod",
"minecraft:waxed_weathered_lightning_rod": "minecraft:lightning_rod",
"minecraft:waxed_oxidized_lightning_rod": "minecraft:lightning_rod",
"minecraft:copper_torch": "minecraft:soul_torch",
"minecraft:copper_wall_torch": "minecraft:soul_wall_torch",
"minecraft:copper_bars": "minecraft:iron_bars",
"minecraft:exposed_copper_bars": "minecraft:iron_bars",
"minecraft:weathered_copper_bars": "minecraft:iron_bars",
"minecraft:oxidized_copper_bars": "minecraft:iron_bars",
"minecraft:waxed_copper_bars": "minecraft:iron_bars",
"minecraft:waxed_exposed_copper_bars": "minecraft:iron_bars",
"minecraft:waxed_weathered_copper_bars": "minecraft:iron_bars",
"minecraft:waxed_oxidized_copper_bars": "minecraft:iron_bars",
"minecraft:copper_chain": "minecraft:chain",
"minecraft:exposed_copper_chain": "minecraft:chain",
"minecraft:weathered_copper_chain": "minecraft:chain",
"minecraft:oxidized_copper_chain": "minecraft:chain",
"minecraft:waxed_copper_chain": "minecraft:chain",
"minecraft:waxed_exposed_copper_chain": "minecraft:chain",
"minecraft:waxed_weathered_copper_chain": "minecraft:chain",
"minecraft:waxed_oxidized_copper_chain": "minecraft:chain",
"minecraft:copper_lantern": "minecraft:soul_lantern",
"minecraft:exposed_copper_lantern": "minecraft:soul_lantern",
"minecraft:weathered_copper_lantern": "minecraft:soul_lantern",
"minecraft:oxidized_copper_lantern": "minecraft:soul_lantern",
"minecraft:waxed_copper_lantern": "minecraft:soul_lantern",
"minecraft:waxed_exposed_copper_lantern": "minecraft:soul_lantern",
"minecraft:waxed_weathered_copper_lantern": "minecraft:soul_lantern",
"minecraft:waxed_oxidized_copper_lantern": "minecraft:soul_lantern",
"minecraft:iron_chain": "minecraft:chain"
},
"MINECRAFT_1_21_5": {
"minecraft:dried_ghast": "minecraft:chorus_plant"
},
Expand Down
2 changes: 1 addition & 1 deletion plugin/src/main/java/net/elytrium/limboapi/LimboAPI.java
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Expand Up @@ -128,7 +128,7 @@
@SuppressFBWarnings("MS_EXPOSE_REP")
public class LimboAPI implements LimboFactory {

private static final int SUPPORTED_MAXIMUM_PROTOCOL_VERSION_NUMBER = 772;
private static final int SUPPORTED_MAXIMUM_PROTOCOL_VERSION_NUMBER = 773;

@MonotonicNonNull
private static Logger LOGGER;
Expand Down
2 changes: 1 addition & 1 deletion plugin/src/main/java/net/elytrium/limboapi/Settings.java
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Expand Up @@ -87,7 +87,7 @@ public static class MAIN {
"1_7_2, 1_7_6, 1_8, 1_9, 1_9_1, 1_9_2, 1_9_4, 1_10, 1_11, 1_11_1, 1_12, 1_12_1, 1_12_2,",
"1_13, 1_13_1, 1_13_2, 1_14, 1_14_1, 1_14_2, 1_14_3, 1_14_4, 1_15, 1_15_1, 1_15_2,",
"1_16, 1_16_1, 1_16_2, 1_16_3, 1_16_4, 1_17, 1_17_1, 1_18, 1_18_2, 1_19, 1_19_1, 1_19_3,",
"1_20, 1_20_2, 1_20_3, 1_20_5, 1_21, 1_21_2, 1_21_4, 1_21_5, 1_21_6, 1_21_7, LATEST"
"1_20, 1_20_2, 1_20_3, 1_20_5, 1_21, 1_21_2, 1_21_4, 1_21_5, 1_21_6, 1_21_7, 1_21_9, LATEST"
})
public String PREPARE_MIN_VERSION = "1_7_2";
public String PREPARE_MAX_VERSION = "LATEST";
Expand Down
33 changes: 22 additions & 11 deletions plugin/src/main/java/net/elytrium/limboapi/protocol/LimboProtocol.java
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Expand Up @@ -197,7 +197,8 @@ public static void init() throws Throwable {
createMapping(0x20, ProtocolVersion.MINECRAFT_1_20_2, true),
createMapping(0x22, ProtocolVersion.MINECRAFT_1_20_5, true),
createMapping(0x23, ProtocolVersion.MINECRAFT_1_21_2, true),
createMapping(0x22, ProtocolVersion.MINECRAFT_1_21_5, true)
createMapping(0x22, ProtocolVersion.MINECRAFT_1_21_5, true),
createMapping(0x26, ProtocolVersion.MINECRAFT_1_21_9, true)
);
register(LIMBO_STATE_REGISTRY, PacketDirection.CLIENTBOUND,
ChunkDataPacket.class, ChunkDataPacket::new,
Expand All @@ -216,7 +217,8 @@ public static void init() throws Throwable {
createMapping(0x25, ProtocolVersion.MINECRAFT_1_20_2, true),
createMapping(0x27, ProtocolVersion.MINECRAFT_1_20_5, true),
createMapping(0x28, ProtocolVersion.MINECRAFT_1_21_2, true),
createMapping(0x27, ProtocolVersion.MINECRAFT_1_21_5, true)
createMapping(0x27, ProtocolVersion.MINECRAFT_1_21_5, true),
createMapping(0x2C, ProtocolVersion.MINECRAFT_1_21_9, true)
);
register(LIMBO_STATE_REGISTRY, PacketDirection.CLIENTBOUND,
ChunkUnloadPacket.class, ChunkUnloadPacket::new,
Expand All @@ -236,7 +238,8 @@ public static void init() throws Throwable {
createMapping(0x1F, ProtocolVersion.MINECRAFT_1_20_2, true),
createMapping(0x21, ProtocolVersion.MINECRAFT_1_20_5, true),
createMapping(0x22, ProtocolVersion.MINECRAFT_1_21_2, true),
createMapping(0x21, ProtocolVersion.MINECRAFT_1_21_5, true)
createMapping(0x21, ProtocolVersion.MINECRAFT_1_21_5, true),
createMapping(0x25, ProtocolVersion.MINECRAFT_1_21_9, true)
);
register(LIMBO_STATE_REGISTRY, PacketDirection.CLIENTBOUND,
DefaultSpawnPositionPacket.class, DefaultSpawnPositionPacket::new,
Expand All @@ -257,7 +260,8 @@ public static void init() throws Throwable {
createMapping(0x54, ProtocolVersion.MINECRAFT_1_20_3, true),
createMapping(0x56, ProtocolVersion.MINECRAFT_1_20_5, true),
createMapping(0x5B, ProtocolVersion.MINECRAFT_1_21_2, true),
createMapping(0x5A, ProtocolVersion.MINECRAFT_1_21_5, true)
createMapping(0x5A, ProtocolVersion.MINECRAFT_1_21_5, true),
createMapping(0x5F, ProtocolVersion.MINECRAFT_1_21_9, true)
);
register(LIMBO_STATE_REGISTRY, PacketDirection.CLIENTBOUND,
MapDataPacket.class, MapDataPacket::new,
Expand All @@ -275,7 +279,8 @@ public static void init() throws Throwable {
createMapping(0x2A, ProtocolVersion.MINECRAFT_1_20_2, true),
createMapping(0x2C, ProtocolVersion.MINECRAFT_1_20_5, true),
createMapping(0x2D, ProtocolVersion.MINECRAFT_1_21_2, true),
createMapping(0x2C, ProtocolVersion.MINECRAFT_1_21_5, true)
createMapping(0x2C, ProtocolVersion.MINECRAFT_1_21_5, true),
createMapping(0x31, ProtocolVersion.MINECRAFT_1_21_9, true)
);
register(LIMBO_STATE_REGISTRY, PacketDirection.CLIENTBOUND,
PlayerAbilitiesPacket.class, PlayerAbilitiesPacket::new,
Expand All @@ -295,7 +300,8 @@ public static void init() throws Throwable {
createMapping(0x36, ProtocolVersion.MINECRAFT_1_20_2, true),
createMapping(0x38, ProtocolVersion.MINECRAFT_1_20_5, true),
createMapping(0x3A, ProtocolVersion.MINECRAFT_1_21_2, true),
createMapping(0x39, ProtocolVersion.MINECRAFT_1_21_5, true)
createMapping(0x39, ProtocolVersion.MINECRAFT_1_21_5, true),
createMapping(0x3E, ProtocolVersion.MINECRAFT_1_21_9, true)
);
register(LIMBO_STATE_REGISTRY, PacketDirection.CLIENTBOUND,
PositionRotationPacket.class, PositionRotationPacket::new,
Expand All @@ -315,7 +321,8 @@ public static void init() throws Throwable {
createMapping(0x3E, ProtocolVersion.MINECRAFT_1_20_2, true),
createMapping(0x40, ProtocolVersion.MINECRAFT_1_20_5, true),
createMapping(0x42, ProtocolVersion.MINECRAFT_1_21_2, true),
createMapping(0x41, ProtocolVersion.MINECRAFT_1_21_5, true)
createMapping(0x41, ProtocolVersion.MINECRAFT_1_21_5, true),
createMapping(0x46, ProtocolVersion.MINECRAFT_1_21_9, true)
);
register(LIMBO_STATE_REGISTRY, PacketDirection.CLIENTBOUND,
SetExperiencePacket.class, SetExperiencePacket::new,
Expand All @@ -334,7 +341,8 @@ public static void init() throws Throwable {
createMapping(0x5A, ProtocolVersion.MINECRAFT_1_20_3, true),
createMapping(0x5C, ProtocolVersion.MINECRAFT_1_20_5, true),
createMapping(0x61, ProtocolVersion.MINECRAFT_1_21_2, true),
createMapping(0x60, ProtocolVersion.MINECRAFT_1_21_5, true)
createMapping(0x60, ProtocolVersion.MINECRAFT_1_21_5, true),
createMapping(0x65, ProtocolVersion.MINECRAFT_1_21_9, true)
);
register(LIMBO_STATE_REGISTRY, PacketDirection.CLIENTBOUND,
SetSlotPacket.class, SetSlotPacket::new,
Expand Down Expand Up @@ -371,7 +379,8 @@ public static void init() throws Throwable {
createMapping(0x62, ProtocolVersion.MINECRAFT_1_20_3, true),
createMapping(0x64, ProtocolVersion.MINECRAFT_1_20_5, true),
createMapping(0x6B, ProtocolVersion.MINECRAFT_1_21_2, true),
createMapping(0x6A, ProtocolVersion.MINECRAFT_1_21_5, true)
createMapping(0x6A, ProtocolVersion.MINECRAFT_1_21_5, true),
createMapping(0x6F, ProtocolVersion.MINECRAFT_1_21_9, true)
);
register(LIMBO_STATE_REGISTRY, PacketDirection.CLIENTBOUND,
UpdateViewPositionPacket.class, UpdateViewPositionPacket::new, // ViewCentre, ChunkRenderDistanceCenter
Expand All @@ -387,7 +396,8 @@ public static void init() throws Throwable {
createMapping(0x52, ProtocolVersion.MINECRAFT_1_20_3, true),
createMapping(0x54, ProtocolVersion.MINECRAFT_1_20_5, true),
createMapping(0x58, ProtocolVersion.MINECRAFT_1_21_2, true),
createMapping(0x57, ProtocolVersion.MINECRAFT_1_21_5, true)
createMapping(0x57, ProtocolVersion.MINECRAFT_1_21_5, true),
createMapping(0x5C, ProtocolVersion.MINECRAFT_1_21_9, true)
);
register(LIMBO_STATE_REGISTRY, PacketDirection.CLIENTBOUND,
UpdateTagsPacket.class, UpdateTagsPacket::new,
Expand All @@ -404,7 +414,8 @@ public static void init() throws Throwable {
createMapping(0x70, ProtocolVersion.MINECRAFT_1_20_2, true),
createMapping(0x74, ProtocolVersion.MINECRAFT_1_20_3, true),
createMapping(0x78, ProtocolVersion.MINECRAFT_1_20_5, true),
createMapping(0x7F, ProtocolVersion.MINECRAFT_1_21_2, true)
createMapping(0x7F, ProtocolVersion.MINECRAFT_1_21_2, true),
createMapping(0x84, ProtocolVersion.MINECRAFT_1_21_9, true)
);

register(LIMBO_STATE_REGISTRY, PacketDirection.SERVERBOUND,
Expand Down
7 changes: 6 additions & 1 deletion plugin/src/main/java/net/elytrium/limboapi/protocol/packets/PacketFactoryImpl.java
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Expand Up @@ -67,7 +67,12 @@ public Object createChunkUnloadPacket(int posX, int posZ) {

@Override
public Object createDefaultSpawnPositionPacket(int posX, int posY, int posZ, float angle) {
return new DefaultSpawnPositionPacket(posX, posY, posZ, angle);
return new DefaultSpawnPositionPacket(Dimension.OVERWORLD.getKey(), posX, posY, posZ, angle, 0);
}

@Override
public Object createDefaultSpawnPositionPacket(String dimension, int posX, int posY, int posZ, float yaw, float pitch) {
return new DefaultSpawnPositionPacket(dimension, posX, posY, posZ, yaw, pitch);
}

@Override
Expand Down
29 changes: 20 additions & 9 deletions .../src/main/java/net/elytrium/limboapi/protocol/packets/s2c/DefaultSpawnPositionPacket.java
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Expand Up @@ -25,16 +25,20 @@

public class DefaultSpawnPositionPacket implements MinecraftPacket {

private final String dimension;
private final int posX;
private final int posY;
private final int posZ;
private final float angle;
private final float yaw;
private final float pitch;

public DefaultSpawnPositionPacket(int posX, int posY, int posZ, float angle) {
public DefaultSpawnPositionPacket(String dimension, int posX, int posY, int posZ, float yaw, float pitch) {
this.dimension = dimension;
this.posX = posX;
this.posY = posY;
this.posZ = posZ;
this.angle = angle;
this.yaw = yaw;
this.pitch = pitch;
}

public DefaultSpawnPositionPacket() {
Expand All @@ -48,7 +52,12 @@ public void decode(ByteBuf buf, ProtocolUtils.Direction direction, ProtocolVersi

@Override
public void encode(ByteBuf buf, ProtocolUtils.Direction direction, ProtocolVersion protocolVersion) {
if (protocolVersion.compareTo(ProtocolVersion.MINECRAFT_1_8) < 0) {
if (protocolVersion.noLessThan(ProtocolVersion.MINECRAFT_1_21_9)) {
ProtocolUtils.writeString(buf, this.dimension);
buf.writeLong(((this.posX & 0x3FFFFFFL) << 38) | ((this.posZ & 0x3FFFFFFL) << 12) | (this.posY & 0xFFFL));
buf.writeFloat(this.yaw);
buf.writeFloat(this.pitch);
} else if (protocolVersion.compareTo(ProtocolVersion.MINECRAFT_1_8) < 0) {
buf.writeInt(this.posX);
buf.writeInt(this.posY);
buf.writeInt(this.posZ);
Expand All @@ -63,7 +72,7 @@ public void encode(ByteBuf buf, ProtocolUtils.Direction direction, ProtocolVersi
buf.writeLong(location);

if (protocolVersion.compareTo(ProtocolVersion.MINECRAFT_1_17) >= 0) {
buf.writeFloat(this.angle);
buf.writeFloat(this.yaw);
}
}
}
Expand All @@ -75,11 +84,13 @@ public boolean handle(MinecraftSessionHandler handler) {

@Override
public String toString() {
return "DefaultSpawnPosition{"
+ "posX=" + this.posX
return "DefaultSpawnPositionPacket{"
+ "dimension='" + this.dimension + '\''
+ ", posX=" + this.posX
+ ", posY=" + this.posY
+ ", posZ=" + this.posZ
+ ", angle=" + this.angle
+ "}";
+ ", yaw=" + this.yaw
+ ", pitch=" + this.pitch
+ '}';
}
}
3 changes: 2 additions & 1 deletion plugin/src/main/java/net/elytrium/limboapi/server/LimboImpl.java
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Expand Up @@ -1089,7 +1089,8 @@ private JoinGamePacket createLegacyJoinGamePacket() {
}

private DefaultSpawnPositionPacket createDefaultSpawnPositionPacket() {
return new DefaultSpawnPositionPacket((int) this.world.getSpawnX(), (int) this.world.getSpawnY(), (int) this.world.getSpawnZ(), 0.0F);
return new DefaultSpawnPositionPacket(this.world.getDimension().getKey(),
(int) this.world.getSpawnX(), (int) this.world.getSpawnY(), (int) this.world.getSpawnZ(), 0.0F, 0.0f);
}

private TimeUpdatePacket createWorldTicksPacket() {
Expand Down
7 changes: 6 additions & 1 deletion plugin/src/main/java/net/elytrium/limboapi/server/world/SimpleItem.java
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Expand Up @@ -52,7 +52,12 @@ public short getID(ProtocolVersion version) {

@Override
public short getID(WorldVersion version) {
return this.versionIDs.get(version);
Short result = this.versionIDs.get(version);
if (result == null) {
throw new IllegalArgumentException("Item " + this.modernId + " does not exists on " + version);
}

return result;
}

@Override
Expand Down
3 changes: 2 additions & 1 deletion plugin/src/main/resources/mapping/modern_block_id_remap.json
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@@ -1,3 +1,4 @@
{
"minecraft:grass": "minecraft:short_grass"
"minecraft:grass": "minecraft:short_grass",
"minecraft:chain": "minecraft:iron_chain"
}