pubsub

Documentation

Index

• Constants
• Variables
• type Config
  • func DefaultConfig() Config
• type GossipHandler
  • func ChainGossipHandler(handlers ...GossipHandler) GossipHandler
  • func DropPeerOnValidationReject(handler GossipHandler, h host.Host, logger log.Log) GossipHandler
• type PubSub
  • func New(ctx context.Context, logger log.Log, h host.Host, cfg Config) (*PubSub, error)
  • func (ps *PubSub) ProtocolPeers(protocol string) []peer.ID
  • func (ps *PubSub) Publish(ctx context.Context, topic string, msg []byte) error
  • func (ps *PubSub) Register(topic string, handler GossipHandler)
• type PublishSubsciber
• type Publisher
• type Subscriber

Constants

const (

	// GossipScoreThreshold when a peer's score drops below this threshold, no gossip is emitted towards that peer
	// and gossip from that peer is ignored.
	GossipScoreThreshold = -500
	// PublishScoreThreshold when a peer's score drops below this threshold, self published messages are not propagated
	// towards this peer when (flood) publishing.
	PublishScoreThreshold = -1000
	// GraylistScoreThreshold when a peer's score drops below this threshold, the peer is graylisted and its RPCs are ignored.
	GraylistScoreThreshold = -2500
	// AcceptPXScoreThreshold when a peer sends us PX information with a prune, we only accept it and connect to the
	// supplied peers if the originating peer's score exceeds this threshold.
	AcceptPXScoreThreshold = 1000
	// OpportunisticGraftScoreThreshold when the median peer score in the mesh drops below this value, the router
	// may select more peers with score above the median to opportunistically graft on the mesh.
	OpportunisticGraftScoreThreshold = 3.5

	// AtxProtocol is the protocol id for ATXs.
	AtxProtocol = "ax1"
	// ProposalProtocol is the protocol id for block proposals.
	ProposalProtocol = "pp1"
	// TxProtocol iis the protocol id for transactions.
	TxProtocol = "tx1"

	// HareProtocol is the protocol id for hare messages.
	HareProtocol = "hr1"

	// BlockCertify is the protocol id for block certification.
	BlockCertify = "bc1"

	// BeaconProtocol is used currently only for recording metrics, but
	// potentially will become used as an actual protocol if we decide to merge
	// the beacon protocols.
	// https://github.com/spacemeshos/go-spacemesh/issues/4207
	BeaconProtocol = "b1"
	// BeaconWeakCoinProtocol is the protocol id for beacon weak coin.
	BeaconWeakCoinProtocol = "bw1"
	// BeaconProposalProtocol is the protocol id for beacon proposals.
	BeaconProposalProtocol = "bp1"
	// BeaconFirstVotesProtocol is the protocol id for beacon first vote.
	BeaconFirstVotesProtocol = "bf1"
	// BeaconFollowingVotesProtocol is the protocol id for beacon following votes.
	BeaconFollowingVotesProtocol = "bo1"

	MalfeasanceProof = "mp1"
)

Variables

var ErrValidationReject = errors.New("validation reject")

ErrValidationReject is returned by a GossipHandler to indicate that the pubsub validation result is ValidationReject. ValidationAccept is indicated by a nil error and ValidationIgnore is indicated by any error that is not a ErrValidationReject.

Types

type Config

type Config struct {
	Flood      bool
	IsBootnode bool
	Bootnodes  []peer.AddrInfo
	// Direct peers should be configured on both ends.
	Direct         []peer.AddrInfo
	MaxMessageSize int
}

Config for PubSub.

func DefaultConfig

func DefaultConfig() Config

DefaultConfig for PubSub.

type GossipHandler

type GossipHandler = func(context.Context, peer.ID, []byte) error

GossipHandler is a function that is for receiving p2p messages.

func ChainGossipHandler

func ChainGossipHandler(handlers ...GossipHandler) GossipHandler

ChainGossipHandler helper to chain multiple GossipHandler together. Called synchronously and in the order.

func DropPeerOnValidationReject

func DropPeerOnValidationReject(handler GossipHandler, h host.Host, logger log.Log) GossipHandler

DropPeerValidationReject wraps a gossip handler to provide a handler that drops a peer if the wrapped handler returns ErrValidationReject.

type PubSub

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

PubSub is a spacemesh-specific wrapper around gossip protocol.

func New

func New(ctx context.Context, logger log.Log, h host.Host, cfg Config) (*PubSub, error)

New creates PubSub instance.

func (*PubSub) ProtocolPeers

func (ps *PubSub) ProtocolPeers(protocol string) []peer.ID

ProtocolPeers returns list of peers that are communicating in a given protocol.

func (*PubSub) Publish

func (ps *PubSub) Publish(ctx context.Context, topic string, msg []byte) error

Publish message to the topic.

func (*PubSub) Register

func (ps *PubSub) Register(topic string, handler GossipHandler)

Register handler for topic.

type PublishSubsciber

type PublishSubsciber interface {
	Publisher
	Subscriber
}

PublishSubsciber common interface for publisher and subscribing.

type Publisher

type Publisher interface {
	Publish(context.Context, string, []byte) error
}

Publisher interface for publishing messages.

type Subscriber

type Subscriber interface {
	Register(string, GossipHandler)
}

Subscriber is an interface for subcribing to messages.