p2p

package
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 Go to latest Published: Jan 16, 2024 License: GPL-3.0 Imports: 66 Imported by: 0

Documentation

Overview

Package p2p defines the network protocol implementation for amc consensus used by amc, including peer discovery using discv5, gossip-sub using libp2p, and handing peer lifecycles + handshakes.

Index

Constants

View Source 
const (
	// V1 RPC Topics
	// RPCStatusTopicV1 defines the v1 topic for the status rpc method.
	RPCStatusTopicV1 = protocolPrefix + StatusMessageName + SchemaVersionV1
	// RPCGoodByeTopicV1 defines the v1 topic for the goodbye rpc method.
	RPCGoodByeTopicV1 = protocolPrefix + GoodbyeMessageName + SchemaVersionV1
	// RPCPingTopicV1 defines the v1 topic for the ping rpc method.
	RPCPingTopicV1 = protocolPrefix + PingMessageName + SchemaVersionV1

	// RPCBodiesDataTopicV1 defines the v1 topic for the Bodies rpc method.
	RPCBodiesDataTopicV1 = protocolPrefix + BodiesByRangeMessageName + SchemaVersionV1

	// RPCHeadersDataTopicV1 defines the v1 topic for the Headers rpc method.
	RPCHeadersDataTopicV1 = protocolPrefix + HeadersByRangeMessageName + SchemaVersionV1
)
View Source 
const (
	// GossipProtocolAndDigest represents the protocol and fork digest prefix in a gossip topic.
	GossipProtocolAndDigest = "/amc/%x/"

	// GossipBlockMessage is the name for the block message type.
	GossipBlockMessage = "block"
	// GossipExitMessage is the name for the voluntary exit message type.
	GossipExitMessage = "voluntary_exit"
	// GossipTransactionMessage is the name for the transaction message type.
	GossipTransactionMessage = "transaction"

	// BlockTopicFormat is the topic format for the block subnet.
	BlockTopicFormat = GossipProtocolAndDigest + GossipBlockMessage
	// ExitBlockTopicFormat is the topic format for the voluntary exit.
	ExitBlockTopicFormat = GossipProtocolAndDigest + GossipExitMessage

	// TransactionTopicFormat is the topic format for the block subnet.
	TransactionTopicFormat = GossipProtocolAndDigest + GossipTransactionMessage
)
View Source 
const BodiesByRangeMessageName = "/bodies_by_range"

BodiesByRangeMessageName specifies the name for the Bodies by range message topic.

View Source 
const GoodbyeMessageName = "/goodbye"

GoodbyeMessageName specifies the name for the goodbye message topic.

View Source 
const (

	//todo
	GossipMaxSize = 10000000
)
View Source 
const HeadersByRangeMessageName = "/headers_by_range"

HeadersByRangeMessageName specifies the name for the Headers by range message topic.

View Source 
const PingMessageName = "/ping"

PingMessageName Specifies the name for the ping message topic.

View Source 
const SchemaVersionV1 = "/1"

SchemaVersionV1 specifies the schema version for our rpc protocol ID.

View Source 
const StatusMessageName = "/status"

StatusMessageName specifies the name for the status message topic.

Variables

View Source 
var ErrMessageNotMapped = errors.New("message type is not mapped to a PubSub topic")

ErrMessageNotMapped occurs on a Broadcast attempt when a message has not been defined in the GossipTypeMapping.

View Source 
var GossipTypeMapping = make(map[reflect.Type]string, len(gossipTopicMappings))

GossipTypeMapping is the inverse of GossipTopicMappings so that an arbitrary protobuf message can be mapped to a protocol ID string.

View Source 
var RPCTopicMappings = map[string]interface{}{

	RPCStatusTopicV1:     new(sync_pb.Status),
	RPCBodiesDataTopicV1: new(sync_pb.BodiesByRangeRequest),

	RPCPingTopicV1:    new(ssztype.SSZUint64),
	RPCGoodByeTopicV1: new(ssztype.SSZUint64),
}

RPCTopicMappings map the base message type to the rpc request.

Functions

func AllTopics 

func AllTopics() []string

AllTopics returns all topics stored in our gossip mapping.

func ExtractGossipDigest 

func ExtractGossipDigest(topic string) ([4]byte, error)

ExtractGossipDigest extracts the relevant fork digest from the gossip topic. Topics are in the form of /eth2/{fork-digest}/{topic} and this method extracts the fork digest from the topic string to a 4 byte array.

func GossipTopicMappings 

func GossipTopicMappings(topic string) proto.Message

GossipTopicMappings is a function to return the assigned data type versioned by epoch.

func MakePeer 

func MakePeer(addr string) (*peer.AddrInfo, error)

MakePeer from multiaddress string.

func MsgID 

func MsgID(genesisHash types.Hash, pmsg *pubsubpb.Message) string

MsgID is a content addressable ID function. `SHA256(message.data)[:20]`.

func MultiAddressBuilder 

func MultiAddressBuilder(ipAddr string, port uint) (ma.Multiaddr, error)

MultiAddressBuilder takes in an ip address string and port to produce a go multiaddr format.

func PeersFromStringAddrs 

func PeersFromStringAddrs(addrs []string) ([]ma.Multiaddr, error)

PeersFromStringAddrs converts peer raw ENRs into multiaddrs for p2p.

func SerializeENR 

func SerializeENR(record *enr.Record) (string, error)

SerializeENR takes the enr record in its key-value form and serializes it.

func TopicDeconstructor 

func TopicDeconstructor(topic string) (string, string, string, error)

TopicDeconstructor splits the provided topic to its logical sub-sections. It is assumed all input topics will follow the specific schema: /protocol-prefix/message-name/schema-version/... For the purposes of deconstruction, only the first 3 components are relevant.

func TopicFromMessage 

func TopicFromMessage(msg string) (string, error)

TopicFromMessage constructs the rpc topic from the provided message type and epoch.

func VerifyTopicMapping 

func VerifyTopicMapping(topic string, msg interface{}) error

VerifyTopicMapping verifies that the topic and its accompanying message type is correct.

Types

type Broadcaster 

type Broadcaster interface {
	Broadcast(context.Context, proto.Message) error
}

Broadcaster broadcasts messages to peers over the p2p pubsub protocol.

type ConnectionHandler 

type ConnectionHandler interface {
	AddConnectionHandler(f func(ctx context.Context, id peer.ID) error,
		j func(ctx context.Context, id peer.ID) error)
	AddDisconnectionHandler(f func(ctx context.Context, id peer.ID) error)
	connmgr.ConnectionGater
}

ConnectionHandler configures p2p to handle connections with a peer.

type EncodingProvider 

type EncodingProvider interface {
	Encoding() encoder.NetworkEncoding
}

EncodingProvider provides p2p network encoding.

type Listener 

type Listener interface {
	Self() *enode.Node
	Close()
	Lookup(enode.ID) []*enode.Node
	Resolve(*enode.Node) *enode.Node
	RandomNodes() enode.Iterator
	Ping(*enode.Node) error
	RequestENR(*enode.Node) (*enode.Node, error)
	LocalNode() *enode.LocalNode
	AllNodes() []*enode.Node
}

Listener defines the discovery V5 network interface that is used to communicate with other peers.

type P2P 

type P2P interface {
	Broadcaster
	SetStreamHandler
	PubSubProvider
	PubSubTopicUser
	SenderEncoder
	PeerManager
	ConnectionHandler
	PeersProvider
	PingProvider

	Start()
	Stop() error
	GetConfig() *conf.P2PConfig
}

P2P represents the full p2p interface composed of all of the sub-interfaces.

type PeerManager 

type PeerManager interface {
	Disconnect(peer.ID) error
	PeerID() peer.ID
	Host() host.Host
	ENR() *enr.Record
	DiscoveryAddresses() ([]multiaddr.Multiaddr, error)
	RefreshENR()
	AddPingMethod(reqFunc func(ctx context.Context, id peer.ID) error)
}

PeerManager abstracts some peer management methods from libp2p.

type PeersProvider 

type PeersProvider interface {
	Peers() *peers.Status
}

PeersProvider abstracts obtaining our current list of known peers status.

type PingProvider 

type PingProvider interface {
	GetPing() *sync_pb.Ping
	IncSeqNumber()
}

PingProvider returns the metadata related information for the local peer.

type PubSubProvider 

type PubSubProvider interface {
	PubSub() *pubsub.PubSub
}

PubSubProvider provides the p2p pubsub protocol.

type PubSubTopicUser 

type PubSubTopicUser interface {
	JoinTopic(topic string, opts ...pubsub.TopicOpt) (*pubsub.Topic, error)
	LeaveTopic(topic string) error
	PublishToTopic(ctx context.Context, topic string, data []byte, opts ...pubsub.PubOpt) error
	SubscribeToTopic(topic string, opts ...pubsub.SubOpt) (*pubsub.Subscription, error)
}

PubSubTopicUser provides way to join, use and leave PubSub topics.

type RPCTopic 

type RPCTopic string

RPCTopic is a type used to denote and represent a req/resp topic.

func (RPCTopic) MessageType 

func (r RPCTopic) MessageType() string

MessageType returns the message type of the rpc topic.

func (RPCTopic) ProtocolPrefix 

func (r RPCTopic) ProtocolPrefix() string

ProtocolPrefix returns the protocol prefix of the rpc topic.

func (RPCTopic) Version 

func (r RPCTopic) Version() string

Version returns the schema version of the rpc topic.

type Sender 

type Sender interface {
	Send(context.Context, interface{}, string, peer.ID) (network.Stream, error)
}

Sender abstracts the sending functionality from libp2p.

type SenderEncoder 

type SenderEncoder interface {
	EncodingProvider
	Sender
}

SenderEncoder allows sending functionality from libp2p as well as encoding for requests and responses.

type Service 

type Service struct {
	// contains filtered or unexported fields
}

Service for managing peer to peer (p2p) networking.

func NewService 

func NewService(ctx context.Context, genesisHash types.Hash, cfg *conf.P2PConfig, nodeCfg conf.NodeConfig) (*Service, error)

NewService initializes a new p2p service compatible with shared.Service interface. No connections are made until the Start function is called during the service registry startup.

func (*Service) AddConnectionHandler 

func (s *Service) AddConnectionHandler(reqFunc, goodByeFunc func(ctx context.Context, id peer.ID) error)

AddConnectionHandler adds a callback function which handles the connection with a newly added peer. It performs a handshake with that peer by sending a hello request and validating the response from the peer.

func (*Service) AddDisconnectionHandler 

func (s *Service) AddDisconnectionHandler(handler func(ctx context.Context, id peer.ID) error)

AddDisconnectionHandler disconnects from peers. It handles updating the peer status. This also calls the handler responsible for maintaining other parts of the sync or p2p system.

func (*Service) AddPingMethod 

func (s *Service) AddPingMethod(reqFunc func(ctx context.Context, id peer.ID) error)

AddPingMethod adds the metadata ping rpc method to the p2p service, so that it can be used to refresh ENR.

func (*Service) Broadcast 

func (s *Service) Broadcast(ctx context.Context, msg proto.Message) error

Broadcast a message to the p2p network, the message is assumed to be broadcasted to the current fork.

func (*Service) CanSubscribe 

func (s *Service) CanSubscribe(topic string) bool

CanSubscribe returns true if the topic is of interest and we could subscribe to it.

func (*Service) Connect 

func (s *Service) Connect(pi peer.AddrInfo) error

Connect to a specific peer.

func (*Service) Disconnect 

func (s *Service) Disconnect(pid peer.ID) error

Disconnect from a peer.

func (*Service) DiscoveryAddresses 

func (s *Service) DiscoveryAddresses() ([]multiaddr.Multiaddr, error)

DiscoveryAddresses represents our enr addresses as multiaddresses.

func (*Service) ENR 

func (s *Service) ENR() *enr.Record

ENR returns the local node's current ENR.

func (*Service) Encoding 

func (_ *Service) Encoding() encoder.NetworkEncoding

Encoding returns the configured networking encoding.

func (*Service) FilterIncomingSubscriptions 

func (s *Service) FilterIncomingSubscriptions(_ peer.ID, subs []*pubsubpb.RPC_SubOpts) ([]*pubsubpb.RPC_SubOpts, error)

FilterIncomingSubscriptions is invoked for all RPCs containing subscription notifications. This method returns only the topics of interest and may return an error if the subscription request contains too many topics.

func (*Service) GetConfig 

func (s *Service) GetConfig() *conf.P2PConfig

func (*Service) GetPing 

func (s *Service) GetPing() *sync_pb.Ping

func (*Service) Host 

func (s *Service) Host() host.Host

Host returns the currently running libp2p host of the service.

func (*Service) IncSeqNumber 

func (s *Service) IncSeqNumber()

func (*Service) InterceptAccept 

func (s *Service) InterceptAccept(n network.ConnMultiaddrs) (allow bool)

InterceptAccept checks whether the incidental inbound connection is allowed.

func (*Service) InterceptAddrDial 

func (s *Service) InterceptAddrDial(pid peer.ID, m multiaddr.Multiaddr) (allow bool)

InterceptAddrDial tests whether we're permitted to dial the specified multiaddr for the given peer.

func (*Service) InterceptPeerDial 

func (_ *Service) InterceptPeerDial(_ peer.ID) (allow bool)

InterceptPeerDial tests whether we're permitted to Dial the specified peer.

func (*Service) InterceptSecured 

func (_ *Service) InterceptSecured(_ network.Direction, _ peer.ID, _ network.ConnMultiaddrs) (allow bool)

InterceptSecured tests whether a given connection, now authenticated, is allowed.

func (*Service) InterceptUpgraded 

func (_ *Service) InterceptUpgraded(_ network.Conn) (allow bool, reason control.DisconnectReason)

InterceptUpgraded tests whether a fully capable connection is allowed.

func (*Service) JoinTopic 

func (s *Service) JoinTopic(topic string, opts ...pubsub.TopicOpt) (*pubsub.Topic, error)

JoinTopic will join PubSub topic, if not already joined.

func (*Service) LeaveTopic 

func (s *Service) LeaveTopic(topic string) error

LeaveTopic closes topic and removes corresponding handler from list of joined topics. This method will return error if there are outstanding event handlers or subscriptions.

func (*Service) PeerID 

func (s *Service) PeerID() peer.ID

PeerID returns the Peer ID of the local peer.

func (*Service) Peers 

func (s *Service) Peers() *peers.Status

Peers returns the peer status interface.

func (*Service) PubSub 

func (s *Service) PubSub() *pubsub.PubSub

PubSub returns the p2p pubsub framework.

func (*Service) PublishToTopic 

func (s *Service) PublishToTopic(ctx context.Context, topic string, data []byte, opts ...pubsub.PubOpt) error

PublishToTopic joins (if necessary) and publishes a message to a PubSub topic.

func (*Service) RefreshENR 

func (s *Service) RefreshENR()

RefreshENR uses an epoch to refresh the enr entry for our node with the tracked committee ids for the epoch, allowing our node to be dynamically discoverable by others given our tracked committee ids.

func (*Service) Send 

func (s *Service) Send(ctx context.Context, message interface{}, baseTopic string, pid peer.ID) (network.Stream, error)

Send a message to a specific peer. The returned stream may be used for reading, but has been closed for writing.

When done, the caller must Close or Reset on the stream.

func (*Service) SetStreamHandler 

func (s *Service) SetStreamHandler(topic string, handler network.StreamHandler)

SetStreamHandler sets the protocol handler on the p2p host multiplexer. This method is a pass through to libp2pcore.Host.SetStreamHandler.

func (*Service) Start 

func (s *Service) Start()

Start the p2p service.

func (*Service) Started 

func (s *Service) Started() bool

Started returns true if the p2p service has successfully started.

func (*Service) Status 

func (s *Service) Status() error

Status of the p2p service. Will return an error if the service is considered unhealthy to indicate that this node should not serve traffic until the issue has been resolved.

func (*Service) Stop 

func (s *Service) Stop() error

Stop the p2p service and terminate all peer connections.

func (*Service) SubscribeToTopic 

func (s *Service) SubscribeToTopic(topic string, opts ...pubsub.SubOpt) (*pubsub.Subscription, error)

SubscribeToTopic joins (if necessary) and subscribes to PubSub topic.

type SetStreamHandler 

type SetStreamHandler interface {
	SetStreamHandler(topic string, handler network.StreamHandler)
}

SetStreamHandler configures p2p to handle streams of a certain topic ID.

Source Files

View all Source files

Directories

Path Synopsis
Package discover implements the Node Discovery Protocol.
 Package discover implements the Node Discovery Protocol.
v4wire
Package v4wire implements the Discovery v4 Wire Protocol.
 Package v4wire implements the Discovery v4 Wire Protocol.
v5wire
Package enr implements Ethereum Node Records as defined in EIP-778.
 Package enr implements Ethereum Node Records as defined in EIP-778.
Package leakybucket implements a scalable leaky bucket algorithm.
 Package leakybucket implements a scalable leaky bucket algorithm.
Package netutil contains extensions to the net package.
 Package netutil contains extensions to the net package.
Package peers provides information about peers at the Ethereum consensus protocol level.
 Package peers provides information about peers at the Ethereum consensus protocol level.
peerdata
scorers
Package types contains all the respective p2p types that are required for sync but cannot be represented as a protobuf schema.
 Package types contains all the respective p2p types that are required for sync but cannot be represented as a protobuf schema.

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