Package net.minecraft.network.message

Class MessageChain

java.lang.Object

net.minecraft.network.message.MessageChain

public class MessageChain
extends Object

A class for handling the "message chain".

MessageHeader includes the signature of the last message the client has seen. This can be used to verify the legitimacy of a chain of messages, since if the chain is valid, the last message's "previous signature" should be able to verify the preceding message.

Clients signing a message with its preceding message's signature is called "packing", and the server creating a signed message with its preceding message's signature is called "unpacking". Unpacked messages can then be verified to check the chain's legitimacy.

Mappings:

Namespace	Name
official	se
intermediary	net/minecraft/class_7610
named	net/minecraft/network/message/MessageChain

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	MessageChain.Packer	Packers sign a message on the client with its preceding message's signature.
static final record	MessageChain.Signature
static interface	MessageChain.Unpacker	Unpacker creates a signed message on the server with the server's preceding message signature when they receive a message.

Field Summary

Fields

Modifier and Type	Field	Description
private @Nullable MessageSignatureData	precedingSignature

Constructor Summary

Constructors

Constructor	Description
MessageChain()

Method Summary

Modifier and Type	Method	Description
private static SignedMessage	createMessage(MessageChain.Signature signature, @Nullable MessageSignatureData precedingSignature, MessageMetadata metadata, DecoratedContents contents, LastSeenMessageList lastSeenMessage)
MessageChain.Packer	getPacker()
MessageChain.Unpacker	getUnpacker()
private MessageChain.Signature	pack(Signer signer, MessageMetadata metadata, DecoratedContents contents, LastSeenMessageList lastSeenMessages)
private static MessageSignatureData	sign(Signer signer, MessageMetadata metadata, @Nullable MessageSignatureData precedingSignature, DecoratedContents contents, LastSeenMessageList lastSeenMessages)
private SignedMessage	unpack(MessageChain.Signature signature, MessageMetadata metadata, DecoratedContents contents, LastSeenMessageList lastSeenMessages)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

precedingSignature

@Nullable
private @Nullable MessageSignatureData precedingSignature

Mappings:

Namespace	Name	Mixin selector
official	a	Lse;a:Lrx;
intermediary	field_39818	Lnet/minecraft/class_7610;field_39818:Lnet/minecraft/class_7469;
named	precedingSignature	Lnet/minecraft/network/message/MessageChain;precedingSignature:Lnet/minecraft/network/message/MessageSignatureData;

Constructor Details

MessageChain

public MessageChain()

Method Details

pack

private MessageChain.Signature pack(Signer signer,
 MessageMetadata metadata,
 DecoratedContents contents,
 LastSeenMessageList lastSeenMessages)

Mappings:

Namespace	Name	Mixin selector
official	a	Lse;a(Lamo;Lry;Lrh;Lru;)Lse$c;
intermediary	method_44875	Lnet/minecraft/class_7610;method_44875(Lnet/minecraft/class_7501;Lnet/minecraft/class_7470;Lnet/minecraft/class_7634;Lnet/minecraft/class_7635;)Lnet/minecraft/class_7610$class_7613;
named	pack	Lnet/minecraft/network/message/MessageChain;pack(Lnet/minecraft/network/encryption/Signer;Lnet/minecraft/network/message/MessageMetadata;Lnet/minecraft/network/message/DecoratedContents;Lnet/minecraft/network/message/LastSeenMessageList;)Lnet/minecraft/network/message/MessageChain$Signature;

sign

private static MessageSignatureData sign(Signer signer,
 MessageMetadata metadata,
 @Nullable
 @Nullable MessageSignatureData precedingSignature,
 DecoratedContents contents,
 LastSeenMessageList lastSeenMessages)

Mappings:

Namespace	Name	Mixin selector
official	a	Lse;a(Lamo;Lry;Lrx;Lrh;Lru;)Lrx;
intermediary	method_44876	Lnet/minecraft/class_7610;method_44876(Lnet/minecraft/class_7501;Lnet/minecraft/class_7470;Lnet/minecraft/class_7469;Lnet/minecraft/class_7634;Lnet/minecraft/class_7635;)Lnet/minecraft/class_7469;
named	sign	Lnet/minecraft/network/message/MessageChain;sign(Lnet/minecraft/network/encryption/Signer;Lnet/minecraft/network/message/MessageMetadata;Lnet/minecraft/network/message/MessageSignatureData;Lnet/minecraft/network/message/DecoratedContents;Lnet/minecraft/network/message/LastSeenMessageList;)Lnet/minecraft/network/message/MessageSignatureData;

unpack

private SignedMessage unpack(MessageChain.Signature signature,
 MessageMetadata metadata,
 DecoratedContents contents,
 LastSeenMessageList lastSeenMessages)

Mappings:

Namespace	Name	Mixin selector
official	a	Lse;a(Lse$c;Lry;Lrh;Lru;)Lsb;
intermediary	method_44878	Lnet/minecraft/class_7610;method_44878(Lnet/minecraft/class_7610$class_7613;Lnet/minecraft/class_7470;Lnet/minecraft/class_7634;Lnet/minecraft/class_7635;)Lnet/minecraft/class_7471;
named	unpack	Lnet/minecraft/network/message/MessageChain;unpack(Lnet/minecraft/network/message/MessageChain$Signature;Lnet/minecraft/network/message/MessageMetadata;Lnet/minecraft/network/message/DecoratedContents;Lnet/minecraft/network/message/LastSeenMessageList;)Lnet/minecraft/network/message/SignedMessage;

createMessage

private static SignedMessage createMessage(MessageChain.Signature signature,
 @Nullable
 @Nullable MessageSignatureData precedingSignature,
 MessageMetadata metadata,
 DecoratedContents contents,
 LastSeenMessageList lastSeenMessage)

Mappings:

Namespace	Name	Mixin selector
official	a	Lse;a(Lse$c;Lrx;Lry;Lrh;Lru;)Lsb;
intermediary	method_44877	Lnet/minecraft/class_7610;method_44877(Lnet/minecraft/class_7610$class_7613;Lnet/minecraft/class_7469;Lnet/minecraft/class_7470;Lnet/minecraft/class_7634;Lnet/minecraft/class_7635;)Lnet/minecraft/class_7471;
named	createMessage	Lnet/minecraft/network/message/MessageChain;createMessage(Lnet/minecraft/network/message/MessageChain$Signature;Lnet/minecraft/network/message/MessageSignatureData;Lnet/minecraft/network/message/MessageMetadata;Lnet/minecraft/network/message/DecoratedContents;Lnet/minecraft/network/message/LastSeenMessageList;)Lnet/minecraft/network/message/SignedMessage;

getUnpacker

public MessageChain.Unpacker getUnpacker()

Mappings:

Namespace	Name	Mixin selector
official	a	Lse;a()Lse$a;
intermediary	method_44874	Lnet/minecraft/class_7610;method_44874()Lnet/minecraft/class_7610$class_7611;
named	getUnpacker	Lnet/minecraft/network/message/MessageChain;getUnpacker()Lnet/minecraft/network/message/MessageChain$Unpacker;

getPacker

public MessageChain.Packer getPacker()

Mappings:

Namespace	Name	Mixin selector
official	b	Lse;b()Lse$b;
intermediary	method_44880	Lnet/minecraft/class_7610;method_44880()Lnet/minecraft/class_7610$class_7612;
named	getPacker	Lnet/minecraft/network/message/MessageChain;getPacker()Lnet/minecraft/network/message/MessageChain$Packer;