p2p

package
v0.0.0-...-eb934a0 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Aug 3, 2023 License: MIT, MIT Imports: 68 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	DefaultMeshD     = 8  // topic stable mesh target count
	DefaultMeshDlo   = 6  // topic stable mesh low watermark
	DefaultMeshDhi   = 12 // topic stable mesh high watermark
	DefaultMeshDlazy = 6  // gossip target

)
View Source 
const DecayEpoch = time.Duration(5)

DecayEpoch is the number of epochs to decay the score over.

View Source 
const DecayToZero = 0.01

DecayToZero is the decay factor for a peer's score to zero.

View Source 
const MaxInMeshScore = 10

MaxInMeshScore is the maximum score for being in the mesh.

View Source 
const MeshWeight = -0.7

MeshWeight is the weight of the mesh delivery topic.

Variables

View Source 
var (
	ErrDisabledDiscovery   = errors.New("discovery disabled")
	ErrNoConnectionManager = errors.New("no connection manager")
	ErrNoConnectionGater   = errors.New("no connection gater")
)
View Source 
var DefaultBootnodes = []*enode.Node{
	enode.MustParse("enode://869d07b5932f17e8490990f75a3f94195e9504ddb6b85f7189e5a9c0a8fff8b00aecf6f3ac450ecba6cdabdb5858788a94bde2b613e0f2d82e9b395355f76d1a@34.65.67.101:0?discport=30305"),
	enode.MustParse("enode://2d4e7e9d48f4dd4efe9342706dd1b0024681bd4c3300d021f86fc75eab7865d4e0cbec6fbc883f011cfd6a57423e7e2f6e104baad2b744c3cafaec6bc7dc92c1@34.65.43.171:0?discport=30305"),
	enode.MustParse("enode://9d7a3efefe442351217e73b3a593bcb8efffb55b4807699972145324eab5e6b382152f8d24f6301baebbfb5ecd4127bd3faab2842c04cd432bdf50ba092f6645@34.65.109.126:0?discport=30305"),
}
View Source 
var MessageDomainInvalidSnappy = [4]byte{0, 0, 0, 0}
View Source 
var MessageDomainValidSnappy = [4]byte{1, 0, 0, 0}
View Source 
var NamespaceRPC = "opp2p"
View Source 
var SigningDomainBlocksV1 = [32]byte{}

Functions

func BlockSigningHash 

func BlockSigningHash(cfg *rollup.Config, payloadBytes []byte) (common.Hash, error)

func BuildBlocksValidator 

func BuildBlocksValidator(log log.Logger, cfg *rollup.Config, runCfg GossipRuntimeConfig) pubsub.ValidatorEx

func BuildGlobalGossipParams 

func BuildGlobalGossipParams(cfg *rollup.Config) pubsub.GossipSubParams

func BuildMsgIdFn 

func BuildMsgIdFn(cfg *rollup.Config) pubsub.MsgIdFunction

BuildMsgIdFn builds a generic message ID function for gossipsub that can handle compressed payloads, mirroring the eth2 p2p gossip spec.

func BuildSubscriptionFilter 

func BuildSubscriptionFilter(cfg *rollup.Config) pubsub.SubscriptionFilter

BuildSubscriptionFilter builds a simple subscription filter, to help protect against peers spamming useless subscriptions.

func ConfigurePeerScoring 

func ConfigurePeerScoring(gossipConf GossipSetupConfigurables, scorer Scorer, log log.Logger) []pubsub.Option

ConfigurePeerScoring configures the peer scoring parameters for the pubsub

func DefaultConnManager 

func DefaultConnManager(conf *Config) (connmgr.ConnManager, error)

func FilterEnodes 

func FilterEnodes(log log.Logger, cfg *rollup.Config) func(node *enode.Node) bool

func FindActiveTCPPort 

func FindActiveTCPPort(h host.Host) (uint16, error)

func LightPeerScoreParams 

func LightPeerScoreParams(cfg *rollup.Config) pubsub.PeerScoreParams

LightPeerScoreParams is an instantiation of pubsub.PeerScoreParams with light penalties. See PeerScoreParams for detailed documentation.

func LogTopicEvents 

func LogTopicEvents(ctx context.Context, log log.Logger, evHandler *pubsub.TopicEventHandler)

func MakeStreamHandler 

func MakeStreamHandler(resourcesCtx context.Context, log log.Logger, fn requestHandlerFn) network.StreamHandler

func MplexC 

func MplexC() libp2p.Option

func NewGossipSub 

func NewGossipSub(p2pCtx context.Context, h host.Host, cfg *rollup.Config, gossipConf GossipSetupConfigurables, scorer Scorer, m GossipMetricer, log log.Logger) (*pubsub.PubSub, error)

NewGossipSub configures a new pubsub instance with the specified parameters. PubSub uses a GossipSubRouter as it's router under the hood.

func NewNetworkNotifier 

func NewNetworkNotifier(log log.Logger, m metrics.Metricer) network.Notifiee

func NewPeerScoreThresholds 

func NewPeerScoreThresholds() pubsub.PeerScoreThresholds

NewPeerScoreThresholds returns a default pubsub.PeerScoreThresholds. See PeerScoreThresholds for detailed documentation.

func NoiseC 

func NoiseC() libp2p.Option

func PayloadByNumberProtocolID 

func PayloadByNumberProtocolID(l2ChainID *big.Int) protocol.ID

func ScoreDecay 

func ScoreDecay(duration time.Duration, slot time.Duration) float64

ScoreDecay returns the decay factor for a given duration.

func SigningHash 

func SigningHash(domain [32]byte, chainID *big.Int, payloadBytes []byte) (common.Hash, error)

func TlsC 

func TlsC() libp2p.Option

func YamuxC 

func YamuxC() libp2p.Option

Types

type API 

type API interface {
	Self(ctx context.Context) (*PeerInfo, error)
	Peers(ctx context.Context, connected bool) (*PeerDump, error)
	PeerStats(ctx context.Context) (*PeerStats, error)
	DiscoveryTable(ctx context.Context) ([]*enode.Node, error)
	BlockPeer(ctx context.Context, p peer.ID) error
	UnblockPeer(ctx context.Context, p peer.ID) error
	ListBlockedPeers(ctx context.Context) ([]peer.ID, error)
	BlockAddr(ctx context.Context, ip net.IP) error
	UnblockAddr(ctx context.Context, ip net.IP) error
	ListBlockedAddrs(ctx context.Context) ([]net.IP, error)
	BlockSubnet(ctx context.Context, ipnet *net.IPNet) error
	UnblockSubnet(ctx context.Context, ipnet *net.IPNet) error
	ListBlockedSubnets(ctx context.Context) ([]*net.IPNet, error)
	ProtectPeer(ctx context.Context, p peer.ID) error
	UnprotectPeer(ctx context.Context, p peer.ID) error
	ConnectPeer(ctx context.Context, addr string) error
	DisconnectPeer(ctx context.Context, id peer.ID) error
}

type APIBackend 

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

func NewP2PAPIBackend 

func NewP2PAPIBackend(node Node, log log.Logger, m metrics.Metricer) *APIBackend

func (*APIBackend) BlockAddr 

func (s *APIBackend) BlockAddr(_ context.Context, ip net.IP) error

BlockAddr adds an IP address to the set of blocked addresses. Note: active connections to the IP address are not automatically closed.

func (*APIBackend) BlockPeer 

func (s *APIBackend) BlockPeer(_ context.Context, p peer.ID) error

func (*APIBackend) BlockSubnet 

func (s *APIBackend) BlockSubnet(_ context.Context, ipnet *net.IPNet) error

BlockSubnet adds an IP subnet to the set of blocked addresses. Note: active connections to the IP subnet are not automatically closed.

func (*APIBackend) ConnectPeer 

func (s *APIBackend) ConnectPeer(ctx context.Context, addr string) error

ConnectPeer connects to a given peer address, and wait for protocol negotiation & identification of the peer

func (*APIBackend) DisconnectPeer 

func (s *APIBackend) DisconnectPeer(_ context.Context, id peer.ID) error

func (*APIBackend) DiscoveryTable 

func (s *APIBackend) DiscoveryTable(_ context.Context) ([]*enode.Node, error)

func (*APIBackend) ListBlockedAddrs 

func (s *APIBackend) ListBlockedAddrs(_ context.Context) ([]net.IP, error)

func (*APIBackend) ListBlockedPeers 

func (s *APIBackend) ListBlockedPeers(_ context.Context) ([]peer.ID, error)

func (*APIBackend) ListBlockedSubnets 

func (s *APIBackend) ListBlockedSubnets(_ context.Context) ([]*net.IPNet, error)

func (*APIBackend) PeerStats 

func (s *APIBackend) PeerStats(_ context.Context) (*PeerStats, error)

func (*APIBackend) Peers 

func (s *APIBackend) Peers(ctx context.Context, connected bool) (*PeerDump, error)

Peers lists information of peers. Optionally filter to only retrieve connected peers.

func (*APIBackend) ProtectPeer 

func (s *APIBackend) ProtectPeer(_ context.Context, p peer.ID) error

func (*APIBackend) Self 

func (s *APIBackend) Self(ctx context.Context) (*PeerInfo, error)

func (*APIBackend) UnblockAddr 

func (s *APIBackend) UnblockAddr(_ context.Context, ip net.IP) error

func (*APIBackend) UnblockPeer 

func (s *APIBackend) UnblockPeer(_ context.Context, p peer.ID) error

func (*APIBackend) UnblockSubnet 

func (s *APIBackend) UnblockSubnet(_ context.Context, ipnet *net.IPNet) error

func (*APIBackend) UnprotectPeer 

func (s *APIBackend) UnprotectPeer(_ context.Context, p peer.ID) error

type ApplicationScoreParams 

type ApplicationScoreParams struct {
	ValidResponseCap    float64
	ValidResponseWeight float64
	ValidResponseDecay  float64

	ErrorResponseCap    float64
	ErrorResponseWeight float64
	ErrorResponseDecay  float64

	RejectedPayloadCap    float64
	RejectedPayloadWeight float64
	RejectedPayloadDecay  float64

	DecayToZero   float64
	DecayInterval time.Duration
}

func LightApplicationScoreParams 

func LightApplicationScoreParams(cfg *rollup.Config) ApplicationScoreParams

type ApplicationScorer 

type ApplicationScorer interface {
	ApplicationScore(id peer.ID) float64
	// contains filtered or unexported methods
}

type Client 

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

func NewClient 

func NewClient(c *rpc.Client) *Client

func (*Client) BlockAddr 

func (c *Client) BlockAddr(ctx context.Context, ip net.IP) error

func (*Client) BlockPeer 

func (c *Client) BlockPeer(ctx context.Context, p peer.ID) error

func (*Client) BlockSubnet 

func (c *Client) BlockSubnet(ctx context.Context, ipnet *net.IPNet) error

func (*Client) ConnectPeer 

func (c *Client) ConnectPeer(ctx context.Context, addr string) error

func (*Client) DisconnectPeer 

func (c *Client) DisconnectPeer(ctx context.Context, id peer.ID) error

func (*Client) DiscoveryTable 

func (c *Client) DiscoveryTable(ctx context.Context) ([]*enode.Node, error)

func (*Client) ListBlockedAddrs 

func (c *Client) ListBlockedAddrs(ctx context.Context) ([]net.IP, error)

func (*Client) ListBlockedPeers 

func (c *Client) ListBlockedPeers(ctx context.Context) ([]peer.ID, error)

func (*Client) ListBlockedSubnets 

func (c *Client) ListBlockedSubnets(ctx context.Context) ([]*net.IPNet, error)

func (*Client) PeerStats 

func (c *Client) PeerStats(ctx context.Context) (*PeerStats, error)

func (*Client) Peers 

func (c *Client) Peers(ctx context.Context, connected bool) (*PeerDump, error)

func (*Client) ProtectPeer 

func (c *Client) ProtectPeer(ctx context.Context, p peer.ID) error

func (*Client) Self 

func (c *Client) Self(ctx context.Context) (*PeerInfo, error)

func (*Client) UnblockAddr 

func (c *Client) UnblockAddr(ctx context.Context, ip net.IP) error

func (*Client) UnblockPeer 

func (c *Client) UnblockPeer(ctx context.Context, p peer.ID) error

func (*Client) UnblockSubnet 

func (c *Client) UnblockSubnet(ctx context.Context, ipnet *net.IPNet) error

func (*Client) UnprotectPeer 

func (c *Client) UnprotectPeer(ctx context.Context, p peer.ID) error

type Config 

type Config struct {
	Priv *crypto.Secp256k1PrivateKey

	DisableP2P  bool
	NoDiscovery bool

	// Enable P2P-based alt-syncing method (req-resp protocol, not gossip)
	AltSync bool

	ScoringParams *ScoringParams

	// Whether to ban peers based on their [PeerScoring] score. Should be negative.
	BanningEnabled bool
	// Minimum score before peers are disconnected and banned
	BanningThreshold float64
	BanningDuration  time.Duration

	ListenIP      net.IP
	ListenTCPPort uint16

	// Port to bind discv5 to
	ListenUDPPort uint16

	AdvertiseIP      net.IP
	AdvertiseTCPPort uint16
	AdvertiseUDPPort uint16
	Bootnodes        []*enode.Node
	DiscoveryDB      *enode.DB

	StaticPeers []core.Multiaddr

	HostMux             []libp2p.Option
	HostSecurity        []libp2p.Option
	NoTransportSecurity bool

	PeersLo    uint
	PeersHi    uint
	PeersGrace time.Duration

	MeshD     int // topic stable mesh target count
	MeshDLo   int // topic stable mesh low watermark
	MeshDHi   int // topic stable mesh high watermark
	MeshDLazy int // gossip target

	// FloodPublish publishes messages from ourselves to peers outside of the gossip topic mesh but supporting the same topic.
	FloodPublish bool

	// If true a NAT manager will host a NAT port mapping that is updated with PMP and UPNP by libp2p/go-nat
	NAT bool

	UserAgent string

	TimeoutNegotiation time.Duration
	TimeoutAccept      time.Duration
	TimeoutDial        time.Duration

	// Underlying store that hosts connection-gater and peerstore data.
	Store ds.Batching

	EnableReqRespSync bool
}

Config sets up a p2p host and discv5 service from configuration. This implements SetupP2P.

func (*Config) BanDuration 

func (conf *Config) BanDuration() time.Duration

func (*Config) BanPeers 

func (conf *Config) BanPeers() bool

func (*Config) BanThreshold 

func (conf *Config) BanThreshold() float64

func (*Config) Check 

func (conf *Config) Check() error

func (*Config) ConfigureGossip 

func (p *Config) ConfigureGossip(rollupCfg *rollup.Config) []pubsub.Option

func (*Config) Disabled 

func (conf *Config) Disabled() bool

func (*Config) Discovery 

func (conf *Config) Discovery(log log.Logger, rollupCfg *rollup.Config, tcpPort uint16) (*enode.LocalNode, *discover.UDPv5, error)

func (*Config) Host 

func (conf *Config) Host(log log.Logger, reporter metrics.Reporter, metrics HostMetrics) (host.Host, error)

func (*Config) PeerScoringParams 

func (conf *Config) PeerScoringParams() *ScoringParams

func (*Config) ReqRespSyncEnabled 

func (conf *Config) ReqRespSyncEnabled() bool

func (*Config) TargetPeers 

func (conf *Config) TargetPeers() uint

type ExtraHostFeatures 

type ExtraHostFeatures interface {
	host.Host
	ConnectionGater() gating.BlockingConnectionGater
	ConnectionManager() connmgr.ConnManager
}

type GossipIn 

type GossipIn interface {
	OnUnsafeL2Payload(ctx context.Context, from peer.ID, msg *eth.ExecutionPayload) error
}

type GossipMetricer 

type GossipMetricer interface {
	RecordGossipEvent(evType int32)
}

type GossipOut 

type GossipOut interface {
	GossipTopicInfo
	PublishL2Payload(ctx context.Context, msg *eth.ExecutionPayload, signer Signer) error
	Close() error
}

func JoinGossip 

func JoinGossip(p2pCtx context.Context, self peer.ID, ps *pubsub.PubSub, log log.Logger, cfg *rollup.Config, runCfg GossipRuntimeConfig, gossipIn GossipIn) (GossipOut, error)

type GossipRuntimeConfig 

type GossipRuntimeConfig interface {
	P2PSequencerAddress() common.Address
}

type GossipSetupConfigurables 

type GossipSetupConfigurables interface {
	PeerScoringParams() *ScoringParams
	// ConfigureGossip creates configuration options to apply to the GossipSub setup
	ConfigureGossip(rollupCfg *rollup.Config) []pubsub.Option
}

type GossipTopicInfo 

type GossipTopicInfo interface {
	BlocksTopicPeers() []peer.ID
}

type HostMetrics 

type HostMetrics interface {
	gating.UnbanMetrics
	gating.ConnectionGaterMetrics
}

type L2Chain 

type L2Chain interface {
	PayloadByNumber(ctx context.Context, number uint64) (*eth.ExecutionPayload, error)
}

type LocalSigner 

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

LocalSigner is suitable for testing

func NewLocalSigner 

func NewLocalSigner(priv *ecdsa.PrivateKey) *LocalSigner

func (*LocalSigner) Close 

func (s *LocalSigner) Close() error

func (*LocalSigner) Sign 

func (s *LocalSigner) Sign(ctx context.Context, domain [32]byte, chainID *big.Int, encodedMsg []byte) (sig *[65]byte, err error)

type MessageHandler 

type MessageHandler func(ctx context.Context, from peer.ID, msg any) error

func BlocksHandler 

func BlocksHandler(onBlock func(ctx context.Context, from peer.ID, msg *eth.ExecutionPayload) error) MessageHandler

type Node 

type Node interface {
	// Host returns the libp2p host
	Host() host.Host
	// Dv5Local returns the control over the Discv5 data of the local node, nil if disabled
	Dv5Local() *enode.LocalNode
	// Dv5Udp returns the control over the Discv5 network, nil if disabled
	Dv5Udp() *discover.UDPv5
	// GossipSub returns the gossip router
	GossipSub() *pubsub.PubSub
	// GossipOut returns the gossip output/info control
	GossipOut() GossipOut
	// ConnectionGater returns the connection gater, to ban/unban peers with, may be nil
	ConnectionGater() gating.BlockingConnectionGater
	// ConnectionManager returns the connection manager, to protect peers with, may be nil
	ConnectionManager() connmgr.ConnManager
}

type NodeP2P 

type NodeP2P struct {
	// contains filtered or unexported fields
}

NodeP2P is a p2p node, which can be used to gossip messages.

func NewNodeP2P 

func NewNodeP2P(resourcesCtx context.Context, rollupCfg *rollup.Config, log log.Logger, setup SetupP2P, gossipIn GossipIn, l2Chain L2Chain, runCfg GossipRuntimeConfig, metrics metrics.Metricer) (*NodeP2P, error)

NewNodeP2P creates a new p2p node, and returns a reference to it. If the p2p is disabled, it returns nil. If metrics are configured, a bandwidth monitor will be spawned in a goroutine.

func (*NodeP2P) AltSyncEnabled 

func (n *NodeP2P) AltSyncEnabled() bool

func (*NodeP2P) BanIP 

func (n *NodeP2P) BanIP(ip net.IP, expiration time.Time) error

func (*NodeP2P) BanPeer 

func (n *NodeP2P) BanPeer(id peer.ID, expiration time.Time) error

func (*NodeP2P) Close 

func (n *NodeP2P) Close() error

func (*NodeP2P) ConnectionGater 

func (n *NodeP2P) ConnectionGater() gating.BlockingConnectionGater

func (*NodeP2P) ConnectionManager 

func (n *NodeP2P) ConnectionManager() connmgr.ConnManager

func (*NodeP2P) DiscoveryProcess 

func (n *NodeP2P) DiscoveryProcess(ctx context.Context, log log.Logger, cfg *rollup.Config, connectGoal uint)

DiscoveryProcess runs a discovery process that randomly walks the DHT to fill the peerstore, and connects to nodes in the peerstore that we are not already connected to. Nodes from the peerstore will be shuffled, unsuccessful connection attempts will cause peers to be avoided, and only nodes with addresses (under TTL) will be connected to.

func (*NodeP2P) Dv5Local 

func (n *NodeP2P) Dv5Local() *enode.LocalNode

func (*NodeP2P) Dv5Udp 

func (n *NodeP2P) Dv5Udp() *discover.UDPv5

func (*NodeP2P) GetPeerScore 

func (n *NodeP2P) GetPeerScore(id peer.ID) (float64, error)

func (*NodeP2P) GossipOut 

func (n *NodeP2P) GossipOut() GossipOut

func (*NodeP2P) GossipSub 

func (n *NodeP2P) GossipSub() *pubsub.PubSub

func (*NodeP2P) Host 

func (n *NodeP2P) Host() host.Host

func (*NodeP2P) IsStatic 

func (n *NodeP2P) IsStatic(id peer.ID) bool

func (*NodeP2P) Peers 

func (n *NodeP2P) Peers() []peer.ID

func (*NodeP2P) RequestL2Range 

func (n *NodeP2P) RequestL2Range(ctx context.Context, start, end eth.L2BlockRef) error

type NoopApplicationScorer 

type NoopApplicationScorer struct{}

func (*NoopApplicationScorer) ApplicationScore 

func (n *NoopApplicationScorer) ApplicationScore(_ peer.ID) float64

type NotificationsMetricer 

type NotificationsMetricer interface {
	IncPeerCount()
	DecPeerCount()
	IncStreamCount()
	DecStreamCount()
}

type OpStackENRData 

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

The discovery ENRs are just key-value lists, and we filter them by records tagged with the "opstack" key, and then check the chain ID and version.

func (*OpStackENRData) DecodeRLP 

func (o *OpStackENRData) DecodeRLP(s *rlp.Stream) error

func (*OpStackENRData) ENRKey 

func (o *OpStackENRData) ENRKey() string

func (*OpStackENRData) EncodeRLP 

func (o *OpStackENRData) EncodeRLP(w io.Writer) error

type PeerDump 

type PeerDump struct {
	TotalConnected uint                 `json:"totalConnected"`
	Peers          map[string]*PeerInfo `json:"peers"`
	BannedPeers    []peer.ID            `json:"bannedPeers"`
	BannedIPS      []net.IP             `json:"bannedIPS"`
	BannedSubnets  []*net.IPNet         `json:"bannedSubnets"`
}

type PeerInfo 

type PeerInfo struct {
	PeerID          peer.ID  `json:"peerID"`
	NodeID          enode.ID `json:"nodeID"`
	UserAgent       string   `json:"userAgent"`
	ProtocolVersion string   `json:"protocolVersion"`
	ENR             string   `json:"ENR"`       // might not always be known, e.g. if the peer connected us instead of us discovering them
	Addresses       []string `json:"addresses"` // multi-addresses. may be mix of LAN / docker / external IPs. All of them are communicated.
	Protocols       []string `json:"protocols"` // negotiated protocols list
	//GossipScore float64
	//PeerScore float64
	Connectedness network.Connectedness `json:"connectedness"` // "NotConnected", "Connected", "CanConnect" (gracefully disconnected), or "CannotConnect" (tried but failed)
	Direction     network.Direction     `json:"direction"`     // "Unknown", "Inbound" (if the peer contacted us), "Outbound" (if we connected to them)
	Protected     bool                  `json:"protected"`     // Protected peers do not get
	ChainID       uint64                `json:"chainID"`       // some peers might try to connect, but we figure out they are on a different chain later. This may be 0 if the peer is not an optimism node at all.
	Latency       time.Duration         `json:"latency"`

	GossipBlocks bool `json:"gossipBlocks"` // if the peer is in our gossip topic

	PeerScores store.PeerScores `json:"scores"`
}

type PeerStats 

type PeerStats struct {
	Connected   uint `json:"connected"`
	Table       uint `json:"table"`
	BlocksTopic uint `json:"blocksTopic"`
	Banned      uint `json:"banned"`
	Known       uint `json:"known"`
}

type Peerstore 

type Peerstore interface {
	// PeerInfo returns a peer.PeerInfo struct for given peer.ID.
	// This is a small slice of the information Peerstore has on
	// that peer, useful to other services.
	PeerInfo(peer.ID) peer.AddrInfo

	// Peers returns all of the peer IDs stored across all inner stores.
	Peers() peer.IDSlice

	SetScore(id peer.ID, diff store.ScoreDiff) (store.PeerScores, error)
}

Peerstore is a subset of the libp2p peerstore.Peerstore interface.

type Prepared 

type Prepared struct {
	HostP2P   host.Host
	LocalNode *enode.LocalNode
	UDPv5     *discover.UDPv5

	EnableReqRespSync bool
}

Prepared provides a p2p host and discv5 service that is already set up. This implements SetupP2P.

func (*Prepared) BanDuration 

func (p *Prepared) BanDuration() time.Duration

func (*Prepared) BanPeers 

func (p *Prepared) BanPeers() bool

func (*Prepared) BanThreshold 

func (p *Prepared) BanThreshold() float64

func (*Prepared) Check 

func (p *Prepared) Check() error

func (*Prepared) ConfigureGossip 

func (p *Prepared) ConfigureGossip(rollupCfg *rollup.Config) []pubsub.Option

func (*Prepared) Disabled 

func (p *Prepared) Disabled() bool

func (*Prepared) Discovery 

func (p *Prepared) Discovery(log log.Logger, rollupCfg *rollup.Config, tcpPort uint16) (*enode.LocalNode, *discover.UDPv5, error)

Discovery creates a disc-v5 service. Returns nil, nil, nil if discovery is disabled.

func (*Prepared) Host 

func (p *Prepared) Host(log log.Logger, reporter metrics.Reporter, metrics HostMetrics) (host.Host, error)

Host creates a libp2p host service. Returns nil, nil if p2p is disabled.

func (*Prepared) PeerScoringParams 

func (p *Prepared) PeerScoringParams() *ScoringParams

func (*Prepared) ReqRespSyncEnabled 

func (p *Prepared) ReqRespSyncEnabled() bool

func (*Prepared) TargetPeers 

func (p *Prepared) TargetPeers() uint

type PreparedSigner 

type PreparedSigner struct {
	Signer
}

func (*PreparedSigner) SetupSigner 

func (p *PreparedSigner) SetupSigner(ctx context.Context) (Signer, error)

type ReqRespServer 

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

func NewReqRespServer 

func NewReqRespServer(cfg *rollup.Config, l2 L2Chain, metrics ReqRespServerMetrics) *ReqRespServer

func (*ReqRespServer) HandleSyncRequest 

func (srv *ReqRespServer) HandleSyncRequest(ctx context.Context, log log.Logger, stream network.Stream)

HandleSyncRequest is a stream handler function to register the L2 unsafe payloads alt-sync protocol. See MakeStreamHandler to transform this into a LibP2P handler function.

Note that the same peer may open parallel streams.

The caller must Close the stream.

type ReqRespServerMetrics 

type ReqRespServerMetrics interface {
	ServerPayloadByNumberEvent(num uint64, resultCode byte, duration time.Duration)
}

type ScoreBook 

type ScoreBook interface {
	GetPeerScores(id peer.ID) (store.PeerScores, error)
	SetScore(id peer.ID, diff store.ScoreDiff) (store.PeerScores, error)
}

type ScoreMetrics 

type ScoreMetrics interface {
	SetPeerScores([]store.PeerScores)
}

type Scorer 

type Scorer interface {
	SnapshotHook() pubsub.ExtendedPeerScoreInspectFn
	ApplicationScore(peer.ID) float64
}

Scorer is a peer scorer that scores peers based on application-specific metrics.

func NewScorer 

func NewScorer(cfg *rollup.Config, peerStore Peerstore, metricer ScoreMetrics, appScorer ApplicationScorer, log log.Logger) Scorer

NewScorer returns a new peer scorer.

type ScoringParams 

type ScoringParams struct {
	PeerScoring        pubsub.PeerScoreParams
	ApplicationScoring ApplicationScoreParams
}

ScoringParams defines the various types of peer scoring parameters.

func GetScoringParams 

func GetScoringParams(name string, cfg *rollup.Config) (*ScoringParams, error)

type Secp256k1 

type Secp256k1 crypto.Secp256k1PublicKey

Secp256k1 is like the geth Secp256k1 enr entry type, but using the libp2p pubkey representation instead

func (*Secp256k1) DecodeRLP 

func (v *Secp256k1) DecodeRLP(s *rlp.Stream) error

DecodeRLP implements rlp.Decoder.

func (Secp256k1) ENRKey 

func (v Secp256k1) ENRKey() string

func (Secp256k1) EncodeRLP 

func (v Secp256k1) EncodeRLP(w io.Writer) error

EncodeRLP implements rlp.Encoder.

type SetupP2P 

type SetupP2P interface {
	Check() error
	Disabled() bool
	// Host creates a libp2p host service. Returns nil, nil if p2p is disabled.
	Host(log log.Logger, reporter metrics.Reporter, metrics HostMetrics) (host.Host, error)
	// Discovery creates a disc-v5 service. Returns nil, nil, nil if discovery is disabled.
	Discovery(log log.Logger, rollupCfg *rollup.Config, tcpPort uint16) (*enode.LocalNode, *discover.UDPv5, error)
	TargetPeers() uint
	BanPeers() bool
	BanThreshold() float64
	BanDuration() time.Duration
	GossipSetupConfigurables
	ReqRespSyncEnabled() bool
}

SetupP2P provides a host and discovery service for usage in the rollup node.

type Signer 

type Signer interface {
	Sign(ctx context.Context, domain [32]byte, chainID *big.Int, encodedMsg []byte) (sig *[65]byte, err error)
	io.Closer
}

type SignerSetup 

type SignerSetup interface {
	SetupSigner(ctx context.Context) (Signer, error)
}

type StreamCtxFn 

type StreamCtxFn func() context.Context

StreamCtxFn provides a new context to use when handling stream requests

type SyncClient 

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

SyncClient implements a reverse chain sync with a minimal interface: signal the desired range, and receive blocks within this range back. Through parent-hash verification, received blocks are all ensured to be part of the canonical chain at one point, but it is up to the user to organize and process the results further.

For the sync-client to retrieve any data, peers must be added with AddPeer(id), and removed upon disconnect with RemovePeer(id). The client is started with Start(), and may be started before or after changing any peers.

### Stages

The sync mechanism is implemented as following: - User sends range request: blocks on sync main loop (with ctx timeout) - Main loop processes range request (from high to low), dividing block requests by number between parallel peers.

  • The high part of the range has a known block-hash, and is marked as trusted.
  • Once there are no more peers available for buffering requests, we stop the range request processing.
  • Every request buffered for a peer is tracked as in-flight, by block number.
  • In-flight requests are not repeated
  • Requests for data that's already in the quarantine are not repeated
  • Data already in the quarantine that is trusted is attempted to be promoted.

- Peers each have their own routine for processing requests.

  • They fetch the requested block by number, parse and validate it, and then send it back to the main loop
  • If peers fail to fetch or process it, or fail to send it back to the main loop within timeout, then the doRequest returns an error. It then marks the in-flight request as completed.

- Main loop receives results synchronously with the range requests

  • The result is removed from in-flight tracker
  • The result is added to the quarantine
  • If we trust the hash, we try to promote the result.

### Concepts

The main concepts are: - Quarantine: an LRU that stores the latest fetched block data, by hash as well as an extra index by number.

  • Quarantine eviction: upon regular LRU eviction, or explicit removal (when we learn data is not canonical), the sync result is removed from quarantine without being forwarded to the receiver. The peer that provided the data may be down-scored for providing un-utilized data if the data is not trusted during eviction.

- Trusted data: data becomes trusted through 2 ways:

  • The hash / parent-hash of the sync target is marked as trusted.
  • The parent-hash of any promoted data is marked as trusted.

- The trusted-data is maintained in LRU: we only care about the recent accessed blocks.

  • Result promotion: content from the quarantine is "promoted" when we find the blockhash is trusted. The data is removed from the quarantine, and forwarded to the receiver.

### Usage

The user is expected to request the range of blocks between its existing chain head, and a trusted future block-hash as reference to sync towards. Upon receiving results from the sync-client, the user should adjust down its sync-target based on the received results, to avoid duplicating work when req-requesting an updated range. Range requests should still be repeated eventually however, as the sync client will give up on syncing a large range when it's too busy syncing.

The rationale for this approach is that this sync mechanism is primarily intended for quickly filling gaps between an existing chain and a gossip chain, and not for very long block ranges. Syncing in the execution-layer (through snap-sync) is more appropriate for long ranges. If the user does sync a long range of blocks through this mechanism, it does end up traversing through the chain, but receives the blocks in reverse order. It is up to the user to persist the blocks for later processing, or drop & resync them if persistence is limited.

func NewSyncClient 

func NewSyncClient(log log.Logger, cfg *rollup.Config, newStream newStreamFn, rcv receivePayloadFn, metrics SyncClientMetrics, appScorer SyncPeerScorer) *SyncClient

func (*SyncClient) AddPeer 

func (s *SyncClient) AddPeer(id peer.ID)

func (*SyncClient) Close 

func (s *SyncClient) Close() error

Close will shut down the sync client and all attached work, and block until shutdown is complete. This will block if the Start() has not created the main background loop.

func (*SyncClient) RemovePeer 

func (s *SyncClient) RemovePeer(id peer.ID)

func (*SyncClient) RequestL2Range 

func (s *SyncClient) RequestL2Range(ctx context.Context, start, end eth.L2BlockRef) error

func (*SyncClient) Start 

func (s *SyncClient) Start()

type SyncClientMetrics 

type SyncClientMetrics interface {
	ClientPayloadByNumberEvent(num uint64, resultCode byte, duration time.Duration)
	PayloadsQuarantineSize(n int)
}

type SyncPeerScorer 

type SyncPeerScorer interface {
	// contains filtered or unexported methods
}

type TopicSubscriber 

type TopicSubscriber func(ctx context.Context, sub *pubsub.Subscription)

func MakeSubscriber 

func MakeSubscriber(log log.Logger, msgHandler MessageHandler) TopicSubscriber

Source Files

View all Source files

Directories

Path Synopsis
mocks
mocks

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.