Add 1.21.20

README.md

@@ -8,7 +8,7 @@ A gophertunnel protocol interface implementation to support older Minecraft Bedr
 | 766         | 1.21.50 | ✅       |
 | 748         | 1.21.40 | ✅       |
 | 729         | 1.21.30 | ✅       |
-| 712         | 1.21.20 | 🚧      |
+| 712         | 1.21.20 | ✅       |
 | 686         | 1.21.2  | 🚧      |
 | 685         | 1.21.0  | 🚧      |
 

legacyver/legacypacket/container_registry_cleanup.go

@@ -0,0 +1,24 @@
+package legacypacket
+
+import (
+	"github.com/akmalfairuz/legacy-version/legacyver/proto"
+	"github.com/sandertv/gophertunnel/minecraft/protocol"
+	"github.com/sandertv/gophertunnel/minecraft/protocol/packet"
+)
+
+// ContainerRegistryCleanup is sent by the server to trigger a client-side cleanup of the dynamic container
+// registry.
+type ContainerRegistryCleanup struct {
+	// RemovedContainers is a list of protocol.FullContainerName's that should be removed from the client-side
+	// container registry.
+	RemovedContainers []proto.FullContainerName
+}
+
+// ID ...
+func (*ContainerRegistryCleanup) ID() uint32 {
+	return packet.IDContainerRegistryCleanup
+}
+
+func (pk *ContainerRegistryCleanup) Marshal(io protocol.IO) {
+	protocol.Slice(io, &pk.RemovedContainers)
+}

legacyver/legacypacket/emote_packet.go

@@ -0,0 +1,49 @@
+package legacypacket
+
+import (
+	"github.com/akmalfairuz/legacy-version/legacyver/proto"
+	"github.com/sandertv/gophertunnel/minecraft/protocol"
+	"github.com/sandertv/gophertunnel/minecraft/protocol/packet"
+)
+
+const (
+	EmoteFlagServerSide = 1 << iota
+	EmoteFlagMuteChat
+)
+
+// Emote is sent by both the server and the client. When the client sends an emote, it sends this packet to
+// the server, after which the server will broadcast the packet to other players online.
+type Emote struct {
+	// EntityRuntimeID is the entity that sent the emote. When a player sends this packet, it has this field
+	// set as its own entity runtime ID.
+	EntityRuntimeID uint64
+	// EmoteLength is the number of ticks that the emote lasts for.
+	EmoteLength uint32
+	// EmoteID is the ID of the emote to send.
+	EmoteID string
+	// XUID is the Xbox User ID of the player that sent the emote. It is only set when the emote is used by a player that
+	// is authenticated with Xbox Live.
+	XUID string
+	// PlatformID is an identifier only set for particular platforms when using an emote (presumably only for Nintendo
+	// Switch). It is otherwise an empty string, and is used to decide which players are able to emote with each other.
+	PlatformID string
+	// Flags is a combination of flags that change the way the Emote packet operates. When the server sends
+	// this packet to other players, EmoteFlagServerSide must be present.
+	Flags byte
+}
+
+// ID ...
+func (*Emote) ID() uint32 {
+	return packet.IDEmote
+}
+
+func (pk *Emote) Marshal(io protocol.IO) {
+	io.Varuint64(&pk.EntityRuntimeID)
+	io.String(&pk.EmoteID)
+	if proto.IsProtoGTE(io, proto.ID729) {
+		io.Varuint32(&pk.EmoteLength)
+	}
+	io.String(&pk.XUID)
+	io.String(&pk.PlatformID)
+	io.Uint8(&pk.Flags)
+}

legacyver/legacypacket/inventory_content.go

@@ -17,7 +17,7 @@ type InventoryContent struct {
 	// the inventory window updated.
 	Content []protocol.ItemInstance
 	// Container is the protocol.FullContainerName that describes the container that the content is for.
-	Container protocol.FullContainerName
+	Container proto.FullContainerName
 	// DynamicContainerSize ...
 	DynamicContainerSize uint32
 	// StorageItem is the item that is acting as the storage container for the inventory. If the inventory is
@@ -34,7 +34,9 @@ func (*InventoryContent) ID() uint32 {
 func (pk *InventoryContent) Marshal(io protocol.IO) {
 	io.Varuint32(&pk.WindowID)
 	protocol.FuncSlice(io, &pk.Content, io.ItemInstance)
-	protocol.Single(io, &pk.Container)
+	if proto.IsProtoGTE(io, proto.ID729) {
+		protocol.Single(io, &pk.Container)
+	}
 	if proto.IsProtoGTE(io, proto.ID748) {
 		io.ItemInstance(&pk.StorageItem)
 	} else {

legacyver/legacypacket/inventory_slot.go

@@ -17,7 +17,7 @@ type InventorySlot struct {
 	// index.
 	Slot uint32
 	// Container is the protocol.FullContainerName that describes the container that the content is for.
-	Container protocol.FullContainerName
+	Container proto.FullContainerName
 	// DynamicContainerSize ...
 	DynamicContainerSize uint32
 	// StorageItem is the item that is acting as the storage container for the inventory. If the inventory is
@@ -37,7 +37,9 @@ func (*InventorySlot) ID() uint32 {
 func (pk *InventorySlot) Marshal(io protocol.IO) {
 	io.Varuint32(&pk.WindowID)
 	io.Varuint32(&pk.Slot)
-	protocol.Single(io, &pk.Container)
+	if proto.IsProtoGTE(io, proto.ID729) {
+		protocol.Single(io, &pk.Container)
+	}
 	if proto.IsProtoGTE(io, proto.ID748) {
 		io.ItemInstance(&pk.StorageItem)
 	} else {

legacyver/legacypacket/resource_packs_info.go

@@ -27,6 +27,10 @@ type ResourcePacksInfo struct {
 	// WorldTemplateVersion is the version of the world template that has been used to generate the world. If
 	// the world was not generated from a template, this field is empty.
 	WorldTemplateVersion string
+	// ForcingServerPacks ...
+	ForcingServerPacks bool
+	// BehaviourPacks ...
+	BehaviourPacks []proto.BehaviourPackInfo
 	// TexturePacks is a list of texture packs that the client needs to download before joining the server.
 	// The order of these texture packs is not relevant in this packet. It is however important in the
 	// ResourcePackStack packet.
@@ -49,6 +53,12 @@ func (pk *ResourcePacksInfo) Marshal(io protocol.IO) {
 		io.UUID(&pk.WorldTemplateUUID)
 		io.String(&pk.WorldTemplateVersion)
 	}
+	if proto.IsProtoLT(io, proto.ID729) {
+		io.Bool(&pk.ForcingServerPacks)
+		protocol.SliceUint16Length(io, &pk.BehaviourPacks)
+	} else {
+		proto.EmptySlice(io, &pk.BehaviourPacks)
+	}
 	protocol.SliceUint16Length(io, &pk.TexturePacks)
 	if proto.IsProtoLT(io, proto.ID748) {
 		protocol.Slice(io, &pk.PackURLs)

legacyver/legacypacket/transfer.go

@@ -0,0 +1,31 @@
+package legacypacket
+
+import (
+	"github.com/akmalfairuz/legacy-version/legacyver/proto"
+	"github.com/sandertv/gophertunnel/minecraft/protocol"
+	"github.com/sandertv/gophertunnel/minecraft/protocol/packet"
+)
+
+// Transfer is sent by the server to transfer a player from the current server to another. Doing so will
+// fully disconnect the client, bring it back to the main menu and make it connect to the next server.
+type Transfer struct {
+	// Address is the address of the new server, which might be either a hostname or an actual IP address.
+	Address string
+	// Port is the UDP port of the new server.
+	Port uint16
+	// ReloadWorld currently has an unknown usage.
+	ReloadWorld bool
+}
+
+// ID ...
+func (*Transfer) ID() uint32 {
+	return packet.IDTransfer
+}
+
+func (pk *Transfer) Marshal(io protocol.IO) {
+	io.String(&pk.Address)
+	io.Uint16(&pk.Port)
+	if proto.IsProtoGTE(io, proto.ID729) {
+		io.Bool(&pk.ReloadWorld)
+	}
+}

legacyver/legacypacket/update_attributes.go

@@ -0,0 +1,32 @@
+package legacypacket
+
+import (
+	"github.com/akmalfairuz/legacy-version/legacyver/proto"
+	"github.com/sandertv/gophertunnel/minecraft/protocol"
+	"github.com/sandertv/gophertunnel/minecraft/protocol/packet"
+)
+
+// UpdateAttributes is sent by the server to update an amount of attributes of any entity in the world. These
+// attributes include ones such as the health or the movement speed of the entity.
+type UpdateAttributes struct {
+	// EntityRuntimeID is the runtime ID of the entity. The runtime ID is unique for each world session, and
+	// entities are generally identified in packets using this runtime ID.
+	EntityRuntimeID uint64
+	// Attributes is a slice of new attributes that the entity gets. It includes attributes such as its
+	// health, movement speed, etc. Note that only changed attributes have to be sent in this packet. It is
+	// not required to send attributes that did not have their values changed.
+	Attributes []proto.Attribute
+	// Tick is the server tick at which the packet was sent. It is used in relation to CorrectPlayerMovePrediction.
+	Tick uint64
+}
+
+// ID ...
+func (*UpdateAttributes) ID() uint32 {
+	return packet.IDUpdateAttributes
+}
+
+func (pk *UpdateAttributes) Marshal(io protocol.IO) {
+	io.Varuint64(&pk.EntityRuntimeID)
+	protocol.Slice(io, &pk.Attributes)
+	io.Varuint64(&pk.Tick)
+}

legacyver/proto/attribute.go

@@ -0,0 +1,58 @@
+package proto
+
+import "github.com/sandertv/gophertunnel/minecraft/protocol"
+
+// Attribute is an entity attribute, that holds specific data such as the health of the entity. Each attribute
+// holds a default value, maximum and minimum value, name and its current value.
+type Attribute struct {
+	protocol.AttributeValue
+	// DefaultMin is the default minimum value of the attribute. It's not clear why this field must be sent to
+	// the client, but it is required regardless.
+	DefaultMin float32
+	// DefaultMax is the default maximum value of the attribute. It's not clear why this field must be sent to
+	// the client, but it is required regardless.
+	DefaultMax float32
+	// Default is the default value of the attribute. It's not clear why this field must be sent to the
+	// client, but it is required regardless.
+	Default float32
+	// Modifiers is a slice of AttributeModifiers that are applied to the attribute.
+	Modifiers []protocol.AttributeModifier
+}
+
+func (x *Attribute) FromLatest(v protocol.Attribute) Attribute {
+	x.AttributeValue = v.AttributeValue
+	x.DefaultMin = v.DefaultMin
+	x.DefaultMax = v.DefaultMax
+	x.Default = v.Default
+	x.Modifiers = v.Modifiers
+	return *x
+}
+
+func (x *Attribute) ToLatest() protocol.Attribute {
+	return protocol.Attribute{
+		AttributeValue: protocol.AttributeValue{
+			Name:  x.Name,
+			Value: x.Value,
+			Max:   x.Max,
+			Min:   x.Min,
+		},
+		DefaultMin: x.DefaultMin,
+		DefaultMax: x.DefaultMax,
+		Default:    x.Default,
+		Modifiers:  x.Modifiers,
+	}
+}
+
+// Marshal encodes/decodes an Attribute.
+func (x *Attribute) Marshal(r protocol.IO) {
+	r.Float32(&x.Min)
+	r.Float32(&x.Max)
+	r.Float32(&x.Value)
+	if IsProtoGTE(r, ID729) {
+		r.Float32(&x.DefaultMin)
+		r.Float32(&x.DefaultMax)
+	}
+	r.Float32(&x.Default)
+	r.String(&x.Name)
+	protocol.Slice(r, &x.Modifiers)
+}

legacyver/proto/camera.go

@@ -53,7 +53,7 @@ type CameraPreset struct {
 	AimAssist protocol.Optional[protocol.CameraPresetAimAssist]
 }
 
-func (x *CameraPreset) FromLatest(cp protocol.CameraPreset) {
+func (x *CameraPreset) FromLatest(cp protocol.CameraPreset) CameraPreset {
 	x.Name = cp.Name
 	x.Parent = cp.Parent
 	x.PosX = cp.PosX
@@ -74,6 +74,7 @@ func (x *CameraPreset) FromLatest(cp protocol.CameraPreset) {
 	x.PlayerEffects = cp.PlayerEffects
 	x.AlignTargetAndCameraForward = cp.AlignTargetAndCameraForward
 	x.AimAssist = cp.AimAssist
+	return *x
 }
 
 func (x *CameraPreset) ToLatest() protocol.CameraPreset {
@@ -110,8 +111,10 @@ func (x *CameraPreset) Marshal(r protocol.IO) {
 	protocol.OptionalFunc(r, &x.PosZ, r.Float32)
 	protocol.OptionalFunc(r, &x.RotX, r.Float32)
 	protocol.OptionalFunc(r, &x.RotY, r.Float32)
-	protocol.OptionalFunc(r, &x.RotationSpeed, r.Float32)
+	if IsProtoGTE(r, ID729) {
-	protocol.OptionalFunc(r, &x.SnapToTarget, r.Bool)
+		protocol.OptionalFunc(r, &x.RotationSpeed, r.Float32)
+		protocol.OptionalFunc(r, &x.SnapToTarget, r.Bool)
+	}
 	if IsProtoGTE(r, ID748) {
 		protocol.OptionalFunc(r, &x.HorizontalRotationLimit, r.Vec2)
 		protocol.OptionalFunc(r, &x.VerticalRotationLimit, r.Vec2)
@@ -121,7 +124,9 @@ func (x *CameraPreset) Marshal(r protocol.IO) {
 		protocol.OptionalFunc(r, &x.TrackingRadius, r.Float32)
 	}
 	protocol.OptionalFunc(r, &x.ViewOffset, r.Vec2)
-	protocol.OptionalFunc(r, &x.EntityOffset, r.Vec3)
+	if IsProtoGTE(r, ID729) {
+		protocol.OptionalFunc(r, &x.EntityOffset, r.Vec3)
+	}
 	protocol.OptionalFunc(r, &x.Radius, r.Float32)
 	protocol.OptionalFunc(r, &x.AudioListener, r.Uint8)
 	protocol.OptionalFunc(r, &x.PlayerEffects, r.Bool)

legacyver/proto/container.go

@@ -0,0 +1,38 @@
+package proto
+
+import "github.com/sandertv/gophertunnel/minecraft/protocol"
+
+// FullContainerName contains information required to identify a container in a StackRequestSlotInfo.
+type FullContainerName struct {
+	// ContainerID is the ID of the container that the slot was in.
+	ContainerID byte
+	// DynamicContainerID is the ID of the container if it is dynamic. If the container is not dynamic, this
+	// field should be left empty. A non-optional value of 0 is assumed to be non-empty.
+	DynamicContainerID protocol.Optional[uint32]
+}
+
+func (x *FullContainerName) FromLatest(v protocol.FullContainerName) FullContainerName {
+	x.ContainerID = v.ContainerID
+	x.DynamicContainerID = v.DynamicContainerID
+	return *x
+}
+
+func (x *FullContainerName) ToLatest() protocol.FullContainerName {
+	return protocol.FullContainerName{
+		ContainerID:        x.ContainerID,
+		DynamicContainerID: x.DynamicContainerID,
+	}
+}
+
+func (x *FullContainerName) Marshal(r protocol.IO) {
+	r.Uint8(&x.ContainerID)
+	if IsProtoGTE(r, ID729) {
+		protocol.OptionalFunc(r, &x.DynamicContainerID, r.Uint32)
+	} else {
+		dynamicContainerID, _ := x.DynamicContainerID.Value()
+		r.Uint32(&dynamicContainerID)
+		if dynamicContainerID != 0 {
+			x.DynamicContainerID = protocol.Option(dynamicContainerID)
+		}
+	}
+}

legacyver/proto/id.go

@@ -3,12 +3,12 @@ package proto
 import "github.com/sandertv/gophertunnel/minecraft/protocol"
 
 const (
-	ID766 = 766
+	ID766 = 766 // v1.21.50
-	ID748 = 748
+	ID748 = 748 // v1.21.40
-	ID729 = 729
+	ID729 = 729 // v1.21.30
-	ID712 = 712
+	ID712 = 712 // v1.21.20
-	ID686 = 686
+	ID686 = 686 // v1.21.2
-	ID685 = 685
+	ID685 = 685 // v1.21.0
 )
 
 func IsProtoGTE(io protocol.IO, proto int32) bool {

legacyver/proto/item_stack.go

@@ -226,6 +226,32 @@ type ItemStackResponse struct {
 	ContainerInfo []StackResponseContainerInfo
 }
 
+func (x *ItemStackResponse) FromLatest(y protocol.ItemStackResponse) ItemStackResponse {
+	ret := ItemStackResponse{
+		Status:        y.Status,
+		RequestID:     y.RequestID,
+		ContainerInfo: make([]StackResponseContainerInfo, len(y.ContainerInfo)),
+	}
+	for i, v := range y.ContainerInfo {
+		ret.ContainerInfo[i] = StackResponseContainerInfo{
+			Container: (&FullContainerName{}).FromLatest(v.Container),
+			SlotInfo:  make([]StackResponseSlotInfo, len(v.SlotInfo)),
+		}
+		for j, w := range v.SlotInfo {
+			ret.ContainerInfo[i].SlotInfo[j] = StackResponseSlotInfo{
+				Slot:                 w.Slot,
+				HotbarSlot:           w.HotbarSlot,
+				Count:                w.Count,
+				StackNetworkID:       w.StackNetworkID,
+				CustomName:           w.CustomName,
+				FilteredCustomName:   w.FilteredCustomName,
+				DurabilityCorrection: w.DurabilityCorrection,
+			}
+		}
+	}
+	return ret
+}
+
 func (x *ItemStackResponse) ToLatest() protocol.ItemStackResponse {
 	ret := protocol.ItemStackResponse{
 		Status:        x.Status,
@@ -234,7 +260,7 @@ func (x *ItemStackResponse) ToLatest() protocol.ItemStackResponse {
 	}
 	for i, v := range x.ContainerInfo {
 		ret.ContainerInfo[i] = protocol.StackResponseContainerInfo{
-			Container: v.Container,
+			Container: v.Container.ToLatest(),
 			SlotInfo:  make([]protocol.StackResponseSlotInfo, len(v.SlotInfo)),
 		}
 		for j, w := range v.SlotInfo {
@@ -266,7 +292,7 @@ type StackResponseContainerInfo struct {
 	// Container is the FullContainerName that describes the container that the slots that follow are in. For
 	// the main inventory, the ContainerID seems to be 0x1b. Fur the cursor, this value seems to be 0x3a. For
 	// the crafting grid, this value seems to be 0x0d.
-	Container protocol.FullContainerName
+	Container FullContainerName
 	// SlotInfo holds information on what item stack should be present in specific slots in the container.
 	SlotInfo []StackResponseSlotInfo
 }
@@ -635,7 +661,7 @@ func (a *CraftResultsDeprecatedStackRequestAction) Marshal(r protocol.IO) {
 // StackRequestSlotInfo holds information on a specific slot client-side.
 type StackRequestSlotInfo struct {
 	// Container is the FullContainerName that describes the container that the slot is in.
-	Container protocol.FullContainerName
+	Container FullContainerName
 	// Slot is the index of the slot within the container with the ContainerID above.
 	Slot byte
 	// StackNetworkID is the unique stack ID that the client assumes to be present in this slot. The server

legacyver/proto/resource_pack.go

@@ -38,6 +38,20 @@ type TexturePackInfo struct {
 	DownloadURL string
 }
 
+func (x *TexturePackInfo) FromLatest(y protocol.TexturePackInfo) TexturePackInfo {
+	x.UUID = y.UUID
+	x.Version = y.Version
+	x.Size = y.Size
+	x.ContentKey = y.ContentKey
+	x.SubPackName = y.SubPackName
+	x.ContentIdentity = y.ContentIdentity
+	x.HasScripts = y.HasScripts
+	x.AddonPack = y.AddonPack
+	x.RTXEnabled = y.RTXEnabled
+	x.DownloadURL = y.DownloadURL
+	return *x
+}
+
 func (x *TexturePackInfo) ToLatest() protocol.TexturePackInfo {
 	return protocol.TexturePackInfo{
 		UUID:            x.UUID,
@@ -79,3 +93,42 @@ func (x *TexturePackInfo) Marshal(r protocol.IO) {
 		r.String(&x.DownloadURL)
 	}
 }
+
+// BehaviourPackInfo represents a behaviour pack's info sent over network. It holds information about the
+// behaviour pack such as its name, description and version.
+type BehaviourPackInfo struct {
+	// UUID is the UUID of the behaviour pack. Each behaviour pack downloaded must have a different UUID in
+	// order for the client to be able to handle them properly.
+	UUID string
+	// Version is the version of the behaviour pack. The client will cache behaviour packs sent by the server as
+	// long as they carry the same version. Sending a behaviour pack with a different version than previously
+	// will force the client to re-download it.
+	Version string
+	// Size is the total size in bytes that the behaviour pack occupies. This is the size of the compressed
+	// archive (zip) of the behaviour pack.
+	Size uint64
+	// ContentKey is the key used to decrypt the behaviour pack if it is encrypted. This is generally the case
+	// for marketplace behaviour packs.
+	ContentKey string
+	// SubPackName ...
+	SubPackName string
+	// ContentIdentity ...
+	ContentIdentity string
+	// HasScripts specifies if the behaviour packs has any scripts in it. A client will only download the
+	// behaviour pack if it supports scripts, which, up to 1.11, only includes Windows 10.
+	HasScripts bool
+	// AddonPack specifies if the texture pack is from an addon.
+	AddonPack bool
+}
+
+// Marshal encodes/decodes a BehaviourPackInfo.
+func (x *BehaviourPackInfo) Marshal(r protocol.IO) {
+	r.String(&x.UUID)
+	r.String(&x.Version)
+	r.Uint64(&x.Size)
+	r.String(&x.ContentKey)
+	r.String(&x.SubPackName)
+	r.String(&x.ContentIdentity)
+	r.Bool(&x.HasScripts)
+	r.Bool(&x.AddonPack)
+}

legacyver/protocol.go

@@ -28,6 +28,10 @@ func convertPacketFunc(pid uint32, cur func() packet.Packet) func() packet.Packe
 		return func() packet.Packet { return &legacypacket.CameraAimAssist{} }
 	case packet.IDCameraPresets:
 		return func() packet.Packet { return &legacypacket.CameraPresets{} }
+	case packet.IDContainerRegistryCleanup:
+		return func() packet.Packet { return &legacypacket.ContainerRegistryCleanup{} }
+	case packet.IDEmote:
+		return func() packet.Packet { return &legacypacket.Emote{} }
 	case packet.IDInventoryContent:
 		return func() packet.Packet { return &legacypacket.InventoryContent{} }
 	case packet.IDInventorySlot:
@@ -40,6 +44,10 @@ func convertPacketFunc(pid uint32, cur func() packet.Packet) func() packet.Packe
 		return func() packet.Packet { return &legacypacket.PlayerAuthInput{} }
 	case packet.IDResourcePacksInfo:
 		return func() packet.Packet { return &legacypacket.ResourcePacksInfo{} }
+	case packet.IDTransfer:
+		return func() packet.Packet { return &legacypacket.Transfer{} }
+	case packet.IDUpdateAttributes:
+		return func() packet.Packet { return &legacypacket.UpdateAttributes{} }
 	default:
 		return cur
 	}
@@ -94,7 +102,7 @@ func (p *Protocol) downgradePackets(pks []packet.Packet, conn *minecraft.Conn) [
 		case *packet.CameraPresets:
 			presets := make([]proto.CameraPreset, len(pk.Presets))
 			for i, p := range pk.Presets {
-				presets[i].FromLatest(p)
+				presets[i] = (&proto.CameraPreset{}).FromLatest(p)
 			}
 			pks[pkIndex] = &legacypacket.CameraPresets{
 				Presets: presets,
@@ -133,49 +141,14 @@ func (p *Protocol) downgradePackets(pks []packet.Packet, conn *minecraft.Conn) [
 		case *packet.ItemStackResponse:
 			responses := make([]proto.ItemStackResponse, len(pk.Responses))
 			for i, r := range pk.Responses {
-				containerInfo := make([]proto.StackResponseContainerInfo, len(r.ContainerInfo))
+				responses[i] = (&proto.ItemStackResponse{}).FromLatest(r)
-				for j, c := range r.ContainerInfo {
-					slotInfo := make([]proto.StackResponseSlotInfo, len(c.SlotInfo))
-					for k, s := range c.SlotInfo {
-						slotInfo[k] = proto.StackResponseSlotInfo{
-							Slot:                 s.Slot,
-							HotbarSlot:           s.HotbarSlot,
-							Count:                s.Count,
-							StackNetworkID:       s.StackNetworkID,
-							CustomName:           s.CustomName,
-							FilteredCustomName:   s.FilteredCustomName,
-							DurabilityCorrection: s.DurabilityCorrection,
-						}
-					}
-					containerInfo[j] = proto.StackResponseContainerInfo{
-						Container: c.Container,
-						SlotInfo:  slotInfo,
-					}
-				}
-
-				responses[i] = proto.ItemStackResponse{
-					Status:        r.Status,
-					RequestID:     r.RequestID,
-					ContainerInfo: containerInfo,
-				}
 			}
 			pks[pkIndex] = &legacypacket.ItemStackResponse{Responses: responses}
 		case *packet.ResourcePacksInfo:
 			texturePacks := make([]proto.TexturePackInfo, len(pk.TexturePacks))
 			packURLs := make([]protocol.PackURL, 0)
 			for i, t := range pk.TexturePacks {
-				texturePacks[i] = proto.TexturePackInfo{
+				texturePacks[i] = (&proto.TexturePackInfo{}).FromLatest(t)
-					UUID:            t.UUID,
-					Version:         t.Version,
-					Size:            t.Size,
-					ContentKey:      t.ContentKey,
-					SubPackName:     t.SubPackName,
-					ContentIdentity: t.ContentIdentity,
-					HasScripts:      t.HasScripts,
-					AddonPack:       t.AddonPack,
-					RTXEnabled:      t.RTXEnabled,
-					DownloadURL:     t.DownloadURL,
-				}
 				if t.DownloadURL != "" {
 					packURLs = append(packURLs, protocol.PackURL{
 						UUIDVersion: t.UUID.String() + "_" + t.Version,
@@ -196,7 +169,7 @@ func (p *Protocol) downgradePackets(pks []packet.Packet, conn *minecraft.Conn) [
 			pks[pkIndex] = &legacypacket.InventorySlot{
 				WindowID:             pk.WindowID,
 				Slot:                 pk.Slot,
-				Container:            pk.Container,
+				Container:            (&proto.FullContainerName{}).FromLatest(pk.Container),
 				DynamicContainerSize: 0,
 				StorageItem:          pk.StorageItem,
 				NewItem:              pk.NewItem,
@@ -205,7 +178,7 @@ func (p *Protocol) downgradePackets(pks []packet.Packet, conn *minecraft.Conn) [
 			pks[pkIndex] = &legacypacket.InventoryContent{
 				WindowID:             pk.WindowID,
 				Content:              pk.Content,
-				Container:            pk.Container,
+				Container:            (&proto.FullContainerName{}).FromLatest(pk.Container),
 				DynamicContainerSize: 0,
 				StorageItem:          pk.StorageItem,
 			}
@@ -227,6 +200,39 @@ func (p *Protocol) downgradePackets(pks []packet.Packet, conn *minecraft.Conn) [
 				TargetMode: pk.TargetMode,
 				Action:     pk.Action,
 			}
+		case *packet.UpdateAttributes:
+			attributes := make([]proto.Attribute, len(pk.Attributes))
+			for i, a := range pk.Attributes {
+				attributes[i] = (&proto.Attribute{}).FromLatest(a)
+			}
+			pks[pkIndex] = &legacypacket.UpdateAttributes{
+				EntityRuntimeID: pk.EntityRuntimeID,
+				Attributes:      attributes,
+				Tick:            pk.Tick,
+			}
+		case *packet.ContainerRegistryCleanup:
+			removedContainers := make([]proto.FullContainerName, len(pk.RemovedContainers))
+			for i, c := range pk.RemovedContainers {
+				removedContainers[i] = (&proto.FullContainerName{}).FromLatest(c)
+			}
+			pks[pkIndex] = &legacypacket.ContainerRegistryCleanup{
+				RemovedContainers: removedContainers,
+			}
+		case *packet.Emote:
+			pks[pkIndex] = &legacypacket.Emote{
+				EntityRuntimeID: pk.EntityRuntimeID,
+				EmoteLength:     pk.EmoteLength,
+				EmoteID:         pk.EmoteID,
+				XUID:            pk.XUID,
+				PlatformID:      pk.PlatformID,
+				Flags:           pk.Flags,
+			}
+		case *packet.Transfer:
+			pks[pkIndex] = &legacypacket.Transfer{
+				Address:     pk.Address,
+				Port:        pk.Port,
+				ReloadWorld: pk.ReloadWorld,
+			}
 		}
 	}
 
@@ -304,7 +310,7 @@ func (p *Protocol) upgradePackets(pks []packet.Packet, conn *minecraft.Conn) []p
 			pks[pkIndex] = &packet.InventorySlot{
 				WindowID:    pk.WindowID,
 				Slot:        pk.Slot,
-				Container:   pk.Container,
+				Container:   pk.Container.ToLatest(),
 				StorageItem: pk.StorageItem,
 				NewItem:     pk.NewItem,
 			}
@@ -312,7 +318,7 @@ func (p *Protocol) upgradePackets(pks []packet.Packet, conn *minecraft.Conn) []p
 			pks[pkIndex] = &packet.InventoryContent{
 				WindowID:    pk.WindowID,
 				Content:     pk.Content,
-				Container:   pk.Container,
+				Container:   pk.Container.ToLatest(),
 				StorageItem: pk.StorageItem,
 			}
 		case *legacypacket.MobEffect:
@@ -333,6 +339,39 @@ func (p *Protocol) upgradePackets(pks []packet.Packet, conn *minecraft.Conn) []p
 				TargetMode: pk.TargetMode,
 				Action:     pk.Action,
 			}
+		case *legacypacket.UpdateAttributes:
+			attributes := make([]protocol.Attribute, len(pk.Attributes))
+			for i, a := range pk.Attributes {
+				attributes[i] = a.ToLatest()
+			}
+			pks[pkIndex] = &packet.UpdateAttributes{
+				EntityRuntimeID: pk.EntityRuntimeID,
+				Attributes:      attributes,
+				Tick:            pk.Tick,
+			}
+		case *legacypacket.ContainerRegistryCleanup:
+			removedContainers := make([]protocol.FullContainerName, len(pk.RemovedContainers))
+			for i, c := range pk.RemovedContainers {
+				removedContainers[i] = c.ToLatest()
+			}
+			pks[pkIndex] = &packet.ContainerRegistryCleanup{
+				RemovedContainers: removedContainers,
+			}
+		case *legacypacket.Emote:
+			pks[pkIndex] = &packet.Emote{
+				EntityRuntimeID: pk.EntityRuntimeID,
+				EmoteLength:     pk.EmoteLength,
+				EmoteID:         pk.EmoteID,
+				XUID:            pk.XUID,
+				PlatformID:      pk.PlatformID,
+				Flags:           pk.Flags,
+			}
+		case *legacypacket.Transfer:
+			pks[pkIndex] = &packet.Transfer{
+				Address:     pk.Address,
+				Port:        pk.Port,
+				ReloadWorld: pk.ReloadWorld,
+			}
 		}
 	}
 	return pks

legacyver/v712.go

@@ -0,0 +1,36 @@
+package legacyver
+
+import (
+	_ "embed"
+	"github.com/akmalfairuz/legacy-version/internal/chunk"
+	"github.com/akmalfairuz/legacy-version/legacyver/proto"
+	"github.com/akmalfairuz/legacy-version/mapping"
+)
+
+const (
+	// ItemVersion712 ...
+	ItemVersion712 = 201
+	// BlockVersion712 ...
+	BlockVersion712 int32 = (1 << 24) | (21 << 16) | (20 << 8)
+)
+
+var (
+	//go:embed data/item_runtime_ids_712.nbt
+	itemRuntimeIDData712 []byte
+	//go:embed data/required_item_list_712.json
+	requiredItemList712 []byte
+	//go:embed data/block_states_712.nbt
+	blockStateData712 []byte
+)
+
+func New712(direct bool) *Protocol {
+	itemMapping := mapping.NewItemMapping(itemRuntimeIDData712, requiredItemList712, ItemVersion712, false)
+	blockMapping := mapping.NewBlockMapping(blockStateData712)
+
+	return &Protocol{
+		ver:             "1.21.20",
+		id:              proto.ID712,
+		blockTranslator: NewBlockTranslator(blockMapping, latestBlockMapping, chunk.NewNetworkPersistentEncoding(blockMapping, BlockVersion712), chunk.NewBlockPaletteEncoding(blockMapping, BlockVersion712), false),
+		itemTranslator:  NewItemTranslator(itemMapping, itemMappingLatest, blockMapping, blockMappingLatest),
+	}
+}