Documentation
¶
Index ¶
- Constants
- type BlockProvider
- type Dispatcher
- type Metricer
- type Metrics
- type Reactor
- func (r *Reactor) BackFillBlocksTotal() int64
- func (r *Reactor) BackFilledBlocks() int64
- func (r *Reactor) Backfill(ctx context.Context, state sm.State) error
- func (r *Reactor) ChunkProcessAvgTime() time.Duration
- func (r *Reactor) OnStart(ctx context.Context) error
- func (r *Reactor) OnStop()
- func (r *Reactor) SnapshotChunksCount() int64
- func (r *Reactor) SnapshotChunksTotal() int64
- func (r *Reactor) SnapshotHeight() int64
- func (r *Reactor) Sync(ctx context.Context) (sm.State, error)
- func (r *Reactor) TotalSnapshots() int64
- type StateProvider
Constants ¶
const ( // SnapshotChannel exchanges snapshot metadata SnapshotChannel = p2p.ChannelID(0x60) // ChunkChannel exchanges chunk contents ChunkChannel = p2p.ChannelID(0x61) // LightBlockChannel exchanges light blocks LightBlockChannel = p2p.ChannelID(0x62) // ParamsChannel exchanges consensus params ParamsChannel = p2p.ChannelID(0x63) )
const (
// MetricsSubsystem is a subsystem shared by all metrics exposed by this package.
MetricsSubsystem = "statesync"
)
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type BlockProvider ¶
type BlockProvider struct {
// contains filtered or unexported fields
}
BlockProvider is a p2p based light provider which uses a dispatcher connected to the state sync reactor to serve light blocks to the light client
TODO: This should probably be moved over to the light package but as we're not yet officially supporting p2p light clients we'll leave this here for now.
NOTE: BlockProvider will return an error with concurrent calls. However, we don't need a mutex because a light client (and the backfill process) will never call a method more than once at the same time
func NewBlockProvider ¶
func NewBlockProvider(peer types.NodeID, chainID string, dispatcher *Dispatcher) *BlockProvider
Creates a block provider which implements the light client Provider interface.
func (*BlockProvider) ID ¶
func (p *BlockProvider) ID() string
Returns the ID address of the provider (NodeID of peer)
func (*BlockProvider) LightBlock ¶
func (p *BlockProvider) LightBlock(ctx context.Context, height int64) (*types.LightBlock, error)
LightBlock fetches a light block from the peer at a specified height returning either a light block or an appropriate error.
func (*BlockProvider) ReportEvidence ¶
ReportEvidence should allow for the light client to report any light client attacks. This is a no op as there currently isn't a way to wire this up to the evidence reactor (we should endeavor to do this in the future but for now it's not critical for backwards verification)
func (*BlockProvider) String ¶
func (p *BlockProvider) String() string
String implements stringer interface
type Dispatcher ¶
type Dispatcher struct {
// contains filtered or unexported fields
}
A Dispatcher multiplexes concurrent requests by multiple peers for light blocks. Only one request per peer can be sent at a time. Subsequent concurrent requests will report an error from the LightBlock method. NOTE: It is not the responsibility of the dispatcher to verify the light blocks.
func NewDispatcher ¶
func NewDispatcher(requestChannel *p2p.Channel) *Dispatcher
func (*Dispatcher) Close ¶
func (d *Dispatcher) Close()
Close shuts down the dispatcher and cancels any pending calls awaiting responses. Peers awaiting responses that have not arrived are delivered a nil block.
func (*Dispatcher) LightBlock ¶
func (d *Dispatcher) LightBlock(ctx context.Context, height int64, peer types.NodeID) (*types.LightBlock, error)
LightBlock uses the request channel to fetch a light block from a given peer tracking, the call and waiting for the reactor to pass back the response. A nil LightBlock response is used to signal that the peer doesn't have the requested LightBlock.
func (*Dispatcher) Respond ¶
func (d *Dispatcher) Respond(ctx context.Context, lb *tmproto.LightBlock, peer types.NodeID) error
Respond allows the underlying process which receives requests on the requestCh to respond with the respective light block. A nil response is used to represent that the receiver of the request does not have a light block at that height.
type Metricer ¶
type Metricer interface {
TotalSnapshots() int64
ChunkProcessAvgTime() time.Duration
SnapshotHeight() int64
SnapshotChunksCount() int64
SnapshotChunksTotal() int64
BackFilledBlocks() int64
BackFillBlocksTotal() int64
}
Metricer defines an interface used for the rpc sync info query, please see statesync.metrics for the details.
type Metrics ¶
type Metrics struct {
// The total number of snapshots discovered.
TotalSnapshots metrics.Counter
// The average processing time per chunk.
ChunkProcessAvgTime metrics.Gauge
// The height of the current snapshot the has been processed.
SnapshotHeight metrics.Gauge
// The current number of chunks that have been processed.
SnapshotChunk metrics.Counter
// The total number of chunks in the current snapshot.
SnapshotChunkTotal metrics.Gauge
// The current number of blocks that have been back-filled.
BackFilledBlocks metrics.Counter
// The total number of blocks that need to be back-filled.
BackFillBlocksTotal metrics.Gauge
}
Metrics contains metrics exposed by this package.
func NopMetrics ¶
func NopMetrics() *Metrics
func PrometheusMetrics ¶
type Reactor ¶
type Reactor struct {
service.BaseService
// contains filtered or unexported fields
}
Reactor handles state sync, both restoring snapshots for the local node and serving snapshots for other nodes.
func NewReactor ¶
func NewReactor( chainID string, initialHeight int64, cfg config.StateSyncConfig, logger log.Logger, conn abciclient.Client, channelCreator p2p.ChannelCreator, peerEvents p2p.PeerEventSubscriber, stateStore sm.Store, blockStore *store.BlockStore, tempDir string, ssMetrics *Metrics, eventBus *eventbus.EventBus, postSyncHook func(context.Context, sm.State) error, needsStateSync bool, ) *Reactor
NewReactor returns a reference to a new state sync reactor, which implements the service.Service interface. It accepts a logger, connections for snapshots and querying, references to p2p Channels and a channel to listen for peer updates on. Note, the reactor will close all p2p Channels when stopping.
func (*Reactor) BackFillBlocksTotal ¶
func (*Reactor) BackFilledBlocks ¶
func (*Reactor) Backfill ¶
Backfill sequentially fetches, verifies and stores light blocks in reverse order. It does not stop verifying blocks until reaching a block with a height and time that is less or equal to the stopHeight and stopTime. The trustedBlockID should be of the header at startHeight.
func (*Reactor) ChunkProcessAvgTime ¶
func (*Reactor) OnStart ¶
OnStart starts separate go routines for each p2p Channel and listens for envelopes on each. In addition, it also listens for peer updates and handles messages on that p2p channel accordingly. Note, we do not launch a go-routine to handle individual envelopes as to not have to deal with bounding workers or pools. The caller must be sure to execute OnStop to ensure the outbound p2p Channels are closed. No error is returned.
func (*Reactor) OnStop ¶
func (r *Reactor) OnStop()
OnStop stops the reactor by signaling to all spawned goroutines to exit and blocking until they all exit.
func (*Reactor) SnapshotChunksCount ¶
func (*Reactor) SnapshotChunksTotal ¶
func (*Reactor) SnapshotHeight ¶
func (*Reactor) Sync ¶
Sync runs a state sync, fetching snapshots and providing chunks to the application. At the close of the operation, Sync will bootstrap the state store and persist the commit at that height so that either consensus or blocksync can commence. It will then proceed to backfill the necessary amount of historical blocks before participating in consensus
func (*Reactor) TotalSnapshots ¶
type StateProvider ¶
type StateProvider interface {
// AppHash returns the app hash after the given height has been committed.
AppHash(ctx context.Context, height uint64) ([]byte, error)
// Commit returns the commit at the given height.
Commit(ctx context.Context, height uint64) (*types.Commit, error)
// State returns a state object at the given height.
State(ctx context.Context, height uint64) (sm.State, error)
}
StateProvider is a provider of trusted state data for bootstrapping a node. This refers to the state.State object, not the state machine. There are two implementations. One uses the P2P layer and the other uses the RPC layer. Both use light client verification.
func NewP2PStateProvider ¶
func NewP2PStateProvider( ctx context.Context, chainID string, initialHeight int64, providers []lightprovider.Provider, trustOptions light.TrustOptions, paramsSendCh *p2p.Channel, logger log.Logger, ) (StateProvider, error)
NewP2PStateProvider creates a light client state provider but uses a dispatcher connected to the P2P layer
func NewRPCStateProvider ¶
func NewRPCStateProvider( ctx context.Context, chainID string, initialHeight int64, servers []string, trustOptions light.TrustOptions, logger log.Logger, ) (StateProvider, error)
NewRPCStateProvider creates a new StateProvider using a light client and RPC clients.
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