node

Documentation

Overview

Package node is the main entry point, where the Node struct, which represents a full node, is defined.

Adding new p2p.Handler(s)

To add a new p2p.Handler, use the CustomHandlers option:

node, err := NewNode(
		config,
		privVal,
		nodeKey,
		clientCreator,
		genesisDocProvider,
		dbProvider,
		metricsProvider,
		logger,
		CustomHandlers(map[string]p2p.Handler{"CUSTOM": customHandler}),
)

Replacing existing p2p.Handler(s)

To replace the built-in p2p.Handler, use the CustomHandlers option:

node, err := NewNode(
		config,
		privVal,
		nodeKey,
		clientCreator,
		genesisDocProvider,
		dbProvider,
		metricsProvider,
		logger,
		CustomHandlers(map[string]p2p.Handler{"BLOCKCHAIN": customBlockchainHandler}),
)

The list of existing reactors can be found in CustomHandlers documentation.

Index

• func DefaultDBProvider(ctx *DBContext) (dbm.DB, error)
• func LoadStateFromDBOrGenesisDocProvider(stateDB dbm.DB, genesisDocProvider GenesisDocProvider) (sm.State, *types.GenesisDoc, error)
• type DBContext
• type DBProvider
• type GenesisDocProvider
  • func DefaultGenesisDocProviderFunc(config *cfg.Config) GenesisDocProvider
• type Greeting
• type ID
• type MetricsProvider
  • func DefaultMetricsProvider(config *cfg.InstrumentationConfig) MetricsProvider
• type Node
  • func DefaultNewNode(config *cfg.Config, logger log.Logger) (*Node, error)
  • func NewNode(config *cfg.Config, privValidator types.PrivValidator, nodeKey *p2p.NodeKey, ...) (*Node, error)
  • func (n *Node) BlockStore() *store.BlockStore
  • func (n *Node) Config() *cfg.Config
  • func (n *Node) ConfigureRPC() error
  • func (n *Node) ConsensusHandler() *cs.Handler
  • func (n *Node) ConsensusState() *cs.State
  • func (n *Node) EventBus() *types.EventBus
  • func (n *Node) EvidencePool() *evidence.Pool
  • func (n *Node) GenesisDoc() *types.GenesisDoc
  • func (n *Node) IsListening() bool
  • func (n *Node) Listeners() []string
  • func (n *Node) Mempool() mempl.Mempool
  • func (n *Node) MempoolHandler() p2p.Handler
  • func (n *Node) NodeInfo() p2p.NodeInfo
  • func (n *Node) OnStart() error
  • func (n *Node) OnStop()
  • func (n *Node) PEXHandler() *pex.Handler
  • func (n *Node) PrivValidator() types.PrivValidator
  • func (n *Node) ProxyApp() proxy.AppConns
  • func (n *Node) Switch() *p2p.Switch
• type Option
  • func CustomHandlers(reactors map[string]p2p.Handler) Option
  • func StateProvider(stateProvider statesync.StateProvider) Option
• type PrivNodeID
  • func (pnid *PrivNodeID) SignGreeting() *SignedNodeGreeting
• type Provider
• type SignedNodeGreeting

Functions

func DefaultDBProvider

func DefaultDBProvider(ctx *DBContext) (dbm.DB, error)

DefaultDBProvider returns a database using the DBBackend and DBDir specified in the ctx.Config.

func LoadStateFromDBOrGenesisDocProvider

func LoadStateFromDBOrGenesisDocProvider(
	stateDB dbm.DB,
	genesisDocProvider GenesisDocProvider,
) (sm.State, *types.GenesisDoc, error)

LoadStateFromDBOrGenesisDocProvider attempts to load the state from the database, or creates one using the given genesisDocProvider. On success this also returns the genesis doc loaded through the given provider.

Types

type DBContext

type DBContext struct {
	ID     string
	Config *cfg.Config
}

DBContext specifies config information for loading a new DB.

type DBProvider

type DBProvider func(*DBContext) (dbm.DB, error)

DBProvider takes a DBContext and returns an instantiated DB.

type GenesisDocProvider

type GenesisDocProvider func() (*types.GenesisDoc, error)

GenesisDocProvider returns a GenesisDoc. It allows the GenesisDoc to be pulled from sources other than the filesystem, for instance from a distributed key-value store cluster.

func DefaultGenesisDocProviderFunc

func DefaultGenesisDocProviderFunc(config *cfg.Config) GenesisDocProvider

DefaultGenesisDocProviderFunc returns a GenesisDocProvider that loads the GenesisDoc from the config.GenesisFile() on the filesystem.

type Greeting

type Greeting struct {
	ID
	Version string
	ChainID string
	Message string
	Time    time.Time
}

type ID

type ID struct {
	Name   string
	PubKey crypto.PubKey
}

type MetricsProvider

type MetricsProvider func(chainID string) (*cs.Metrics, *p2p.Metrics, *mempl.Metrics, *sm.Metrics, *proxy.Metrics)

MetricsProvider returns a consensus, p2p and mempool Metrics.

func DefaultMetricsProvider

func DefaultMetricsProvider(config *cfg.InstrumentationConfig) MetricsProvider

DefaultMetricsProvider returns Metrics build using Prometheus client library if Prometheus is enabled. Otherwise, it returns no-op Metrics.

type Node

type Node struct {
	service.BaseService
	// contains filtered or unexported fields
}

Node is the highest level interface to a full CometBFT node. It includes all configuration information and running services.

func DefaultNewNode

func DefaultNewNode(config *cfg.Config, logger log.Logger) (*Node, error)

DefaultNewNode returns a CometBFT node with default settings for the PrivValidator, ClientCreator, GenesisDoc, and DBProvider. It implements NodeProvider.

func NewNode

func NewNode(config *cfg.Config,
	privValidator types.PrivValidator,
	nodeKey *p2p.NodeKey,
	clientCreator proxy.ClientCreator,
	genesisDocProvider GenesisDocProvider,
	dbProvider DBProvider,
	metricsProvider MetricsProvider,
	logger log.Logger,
	options ...Option,
) (*Node, error)

NewNode returns a new, ready to go, CometBFT Node.

func (*Node) BlockStore

func (n *Node) BlockStore() *store.BlockStore

BlockStore returns the Node's BlockStore.

func (*Node) Config

func (n *Node) Config() *cfg.Config

Config returns the Node's config.

func (*Node) ConfigureRPC

func (n *Node) ConfigureRPC() error

ConfigureRPC makes sure RPC has all the objects it needs to operate.

func (*Node) ConsensusHandler

func (n *Node) ConsensusHandler() *cs.Handler

ConsensusHandler returns the Node's ConsensusHandler.

func (*Node) ConsensusState

func (n *Node) ConsensusState() *cs.State

ConsensusState returns the Node's ConsensusState.

func (*Node) EventBus

func (n *Node) EventBus() *types.EventBus

EventBus returns the Node's EventBus.

func (*Node) EvidencePool

func (n *Node) EvidencePool() *evidence.Pool

EvidencePool returns the Node's EvidencePool.

func (*Node) GenesisDoc

func (n *Node) GenesisDoc() *types.GenesisDoc

GenesisDoc returns the Node's GenesisDoc.

func (*Node) IsListening

func (n *Node) IsListening() bool

func (*Node) Listeners

func (n *Node) Listeners() []string

func (*Node) Mempool

func (n *Node) Mempool() mempl.Mempool

Mempool returns the Node's mempool.

func (*Node) MempoolHandler

func (n *Node) MempoolHandler() p2p.Handler

MempoolHandler returns the Node's mempool reactor.

func (*Node) NodeInfo

func (n *Node) NodeInfo() p2p.NodeInfo

NodeInfo returns the Node's Info from the Switch.

func (*Node) OnStart

func (n *Node) OnStart() error

OnStart starts the Node. It implements service.Service.

func (*Node) OnStop

func (n *Node) OnStop()

OnStop stops the Node. It implements service.Service.

func (*Node) PEXHandler

func (n *Node) PEXHandler() *pex.Handler

PEXHandler returns the Node's PEXHandler. It returns nil if PEX is disabled.

func (*Node) PrivValidator

func (n *Node) PrivValidator() types.PrivValidator

PrivValidator returns the Node's PrivValidator. XXX: for convenience only!

func (*Node) ProxyApp

func (n *Node) ProxyApp() proxy.AppConns

ProxyApp returns the Node's AppConns, representing its connections to the ABCI application.

func (*Node) Switch

func (n *Node) Switch() *p2p.Switch

Switch returns the Node's Switch.

type Option

type Option func(*Node)

Option sets a parameter for the node.

func CustomHandlers

func CustomHandlers(reactors map[string]p2p.Handler) Option

CustomHandlers allows you to add custom reactors (name -> p2p.Handler) to the node's Switch.

WARNING: using any name from the below list of the existing reactors will result in replacing it with the custom one.

• MEMPOOL
• BLOCKCHAIN
• CONSENSUS
• EVIDENCE
• PEX
• STATESYNC

func StateProvider

func StateProvider(stateProvider statesync.StateProvider) Option

StateProvider overrides the state provider used by state sync to retrieve trusted app hashes and build a State object for bootstrapping the node. WARNING: this interface is considered unstable and subject to change.

type PrivNodeID

type PrivNodeID struct {
	ID
	PrivKey crypto.PrivKey
}

func (*PrivNodeID) SignGreeting

func (pnid *PrivNodeID) SignGreeting() *SignedNodeGreeting

type Provider

type Provider func(*cfg.Config, log.Logger) (*Node, error)

Provider takes a config and a logger and returns a ready to go Node.

type SignedNodeGreeting

type SignedNodeGreeting struct {
	Greeting
	Signature []byte
}