peers

package
v1.3.7 Latest Latest
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 Go to latest Published: Apr 12, 2021 License: GPL-3.0 Imports: 19 Imported by: 14

Documentation

Overview

Package peers provides information about peers at the eth2 protocol level.

"Protocol level" is the level above the network level, so this layer never sees or interacts with (for example) hosts that are uncontactable due to being down, firewalled, etc. Instead, this works with peers that are contactable but may or may not be of the correct fork version, not currently required due to the number of current connections, etc.

A peer can have one of a number of states:

- connected if we are able to talk to the remote peer - connecting if we are attempting to be able to talk to the remote peer - disconnecting if we are attempting to stop being able to talk to the remote peer - disconnected if we are not able to talk to the remote peer

For convenience, there are two aggregate states expressed in functions:

- active if we are connecting or connected - inactive if we are disconnecting or disconnected

Peer information is persistent for the run of the service. This allows for collection of useful long-term statistics such as number of bad responses obtained from the peer, giving the basis for decisions to not talk to known-bad peers (by de-scoring them).

Index

Constants

View Source 
const (
	// PeerDisconnected means there is no connection to the peer.
	PeerDisconnected peerdata.PeerConnectionState = iota
	// PeerDisconnecting means there is an on-going attempt to disconnect from the peer.
	PeerDisconnecting
	// PeerConnected means the peer has an active connection.
	PeerConnected
	// PeerConnecting means there is an on-going attempt to connect to the peer.
	PeerConnecting
)
View Source 
const (
	// ColocationLimit restricts how many peer identities we can see from a single ip or ipv6 subnet.
	ColocationLimit = 5

	// InboundRatio is the proportion of our connected peer limit at which we will allow inbound peers.
	InboundRatio = float64(0.8)

	// MinBackOffDuration minimum amount (in milliseconds) to wait before peer is re-dialed.
	// When node and peer are dialing each other simultaneously connection may fail. In order, to break
	// of constant dialing, peer is assigned some backoff period, and only dialed again once that backoff is up.
	MinBackOffDuration = 100
	// MaxBackOffDuration maximum amount (in milliseconds) to wait before peer is re-dialed.
	MaxBackOffDuration = 5000
)

Variables

This section is empty.

Functions

This section is empty.

Types

type Status 

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

Status is the structure holding the peer status information.

func NewStatus 

func NewStatus(ctx context.Context, config *StatusConfig) *Status

NewStatus creates a new status entity.

func (*Status) Active 

func (p *Status) Active() []peer.ID

Active returns the peers that are connecting or connected.

func (*Status) Add 

func (p *Status) Add(record *enr.Record, pid peer.ID, address ma.Multiaddr, direction network.Direction)

Add adds a peer. If a peer already exists with this ID its address and direction are updated with the supplied data.

func (*Status) Address 

func (p *Status) Address(pid peer.ID) (ma.Multiaddr, error)

Address returns the multiaddress of the given remote peer. This will error if the peer does not exist.

func (*Status) All 

func (p *Status) All() []peer.ID

All returns all the peers regardless of state.

func (*Status) Bad added in v0.3.2 

func (p *Status) Bad() []peer.ID

Bad returns the peers that are bad.

func (*Status) BestFinalized 

func (p *Status) BestFinalized(maxPeers int, ourFinalizedEpoch types.Epoch) (types.Epoch, []peer.ID)

BestFinalized returns the highest finalized epoch equal to or higher than ours that is agreed upon by the majority of peers. This method may not return the absolute highest finalized, but the finalized epoch in which most peers can serve blocks (plurality voting). Ideally, all peers would be reporting the same finalized epoch but some may be behind due to their own latency, or because of their finalized epoch at the time we queried them. Returns epoch number and list of peers that are at or beyond that epoch.

func (*Status) BestNonFinalized added in v1.0.0 

func (p *Status) BestNonFinalized(minPeers int, ourHeadEpoch types.Epoch) (types.Epoch, []peer.ID)

BestNonFinalized returns the highest known epoch, higher than ours, and is shared by at least minPeers.

func (*Status) ChainState 

func (p *Status) ChainState(pid peer.ID) (*pb.Status, error)

ChainState gets the chain state of the given remote peer. This can return nil if there is no known chain state for the peer. This will error if the peer does not exist.

func (*Status) ChainStateLastUpdated 

func (p *Status) ChainStateLastUpdated(pid peer.ID) (time.Time, error)

ChainStateLastUpdated gets the last time the chain state of the given remote peer was updated. This will error if the peer does not exist.

func (*Status) CommitteeIndices added in v0.3.8 

func (p *Status) CommitteeIndices(pid peer.ID) ([]uint64, error)

CommitteeIndices retrieves the committee subnets the peer is subscribed to.

func (*Status) Connected 

func (p *Status) Connected() []peer.ID

Connected returns the peers that are connected.

func (*Status) ConnectedPeerLimit added in v1.0.5 

func (p *Status) ConnectedPeerLimit() uint64

ConnectedPeerLimit returns the peer limit of concurrent peers connected to the beacon-node.

func (*Status) Connecting 

func (p *Status) Connecting() []peer.ID

Connecting returns the peers that are connecting.

func (*Status) ConnectionState 

func (p *Status) ConnectionState(pid peer.ID) (peerdata.PeerConnectionState, error)

ConnectionState gets the connection state of the given remote peer. This will error if the peer does not exist.

func (*Status) Direction 

func (p *Status) Direction(pid peer.ID) (network.Direction, error)

Direction returns the direction of the given remote peer. This will error if the peer does not exist.

func (*Status) Disconnected 

func (p *Status) Disconnected() []peer.ID

Disconnected returns the peers that are disconnected.

func (*Status) Disconnecting 

func (p *Status) Disconnecting() []peer.ID

Disconnecting returns the peers that are disconnecting.

func (*Status) ENR added in v1.0.0 

func (p *Status) ENR(pid peer.ID) (*enr.Record, error)

ENR returns the enr for the corresponding peer id.

func (*Status) HighestEpoch added in v1.0.0 

func (p *Status) HighestEpoch() types.Epoch

HighestEpoch returns the highest epoch reported epoch amongst peers.

func (*Status) Inactive 

func (p *Status) Inactive() []peer.ID

Inactive returns the peers that are disconnecting or disconnected.

func (*Status) Inbound added in v1.1.0 

func (p *Status) Inbound() []peer.ID

Inbound returns the current batch of inbound peers.

func (*Status) InboundConnected added in v1.2.0 

func (p *Status) InboundConnected() []peer.ID

InboundConnected returns the current batch of inbound peers that are connected.

func (*Status) InboundLimit added in v1.3.0 

func (p *Status) InboundLimit() int

InboundLimit returns the current inbound peer limit.

func (*Status) IsAboveInboundLimit added in v1.0.5 

func (p *Status) IsAboveInboundLimit() bool

IsAboveInboundLimit checks if we are above our current inbound peer limit.

func (*Status) IsActive added in v0.3.8 

func (p *Status) IsActive(pid peer.ID) bool

IsActive checks if a peers is active and returns the result appropriately.

func (*Status) IsBad 

func (p *Status) IsBad(pid peer.ID) bool

IsBad states if the peer is to be considered bad (by *any* of the registered scorers). If the peer is unknown this will return `false`, which makes using this function easier than returning an error.

func (*Status) IsReadyToDial added in v1.0.0 

func (p *Status) IsReadyToDial(pid peer.ID) bool

IsReadyToDial checks where the given peer is ready to be dialed again.

func (*Status) MaxPeerLimit added in v1.0.0 

func (p *Status) MaxPeerLimit() int

MaxPeerLimit returns the max peer limit stored in the current peer store.

func (*Status) Metadata added in v1.0.0 

func (p *Status) Metadata(pid peer.ID) (*pb.MetaData, error)

Metadata returns a copy of the metadata corresponding to the provided peer id.

func (*Status) NextValidTime added in v1.0.0 

func (p *Status) NextValidTime(pid peer.ID) (time.Time, error)

NextValidTime gets the earliest possible time it is to contact/dial a peer again. This is used to back-off from peers in the event they are 'full' or have banned us.

func (*Status) Outbound added in v1.1.0 

func (p *Status) Outbound() []peer.ID

Outbound returns the current batch of outbound peers.

func (*Status) OutboundConnected added in v1.2.0 

func (p *Status) OutboundConnected() []peer.ID

OutboundConnected returns the current batch of outbound peers that are connected.

func (*Status) PeersToPrune added in v1.1.0 

func (p *Status) PeersToPrune() []peer.ID

PeersToPrune selects the most sutiable inbound peers to disconnect the host peer from. As of this moment the pruning relies on simple heuristics such as bad response count. In the future scoring will be used to determine the most suitable peers to take out.

func (*Status) Prune added in v1.0.0 

func (p *Status) Prune()

Prune clears out and removes outdated and disconnected peers.

func (*Status) RandomizeBackOff added in v1.3.6 

func (p *Status) RandomizeBackOff(pid peer.ID)

RandomizeBackOff adds extra backoff period during which peer will not be dialed.

func (*Status) Scorers added in v1.0.0 

func (p *Status) Scorers() *scorers.Service

Scorers exposes peer scoring management service.

func (*Status) SetChainState 

func (p *Status) SetChainState(pid peer.ID, chainState *pb.Status)

SetChainState sets the chain state of the given remote peer.

func (*Status) SetConnectionState 

func (p *Status) SetConnectionState(pid peer.ID, state peerdata.PeerConnectionState)

SetConnectionState sets the connection state of the given remote peer.

func (*Status) SetMetadata added in v1.0.0 

func (p *Status) SetMetadata(pid peer.ID, metaData *pb.MetaData)

SetMetadata sets the metadata of the given remote peer.

func (*Status) SetNextValidTime added in v1.0.0 

func (p *Status) SetNextValidTime(pid peer.ID, nextTime time.Time)

SetNextValidTime sets the earliest possible time we are able to contact this peer again.

func (*Status) SubscribedToSubnet added in v0.3.8 

func (p *Status) SubscribedToSubnet(index uint64) []peer.ID

SubscribedToSubnet retrieves the peers subscribed to the given committee subnet.

type StatusConfig added in v1.0.0 

type StatusConfig struct {
	// PeerLimit specifies maximum amount of concurrent peers that are expected to be connect to the node.
	PeerLimit int
	// ScorerParams holds peer scorer configuration params.
	ScorerParams *scorers.Config
}

StatusConfig represents peer status service params.

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