headtracker

Documentation

Index

• Constants
• Variables
• func NewHeadBroadcaster(lggr logger.Logger) httypes.HeadBroadcaster
• func NewHeadListener(lggr logger.Logger, ethClient evmclient.Client, config Config, ...) httypes.HeadListener
• func NewHeadSaver(lggr logger.Logger, orm ORM, config Config) httypes.HeadSaver
• func NewHeadTracker(lggr logger.Logger, ethClient evmclient.Client, config Config, ...) httypes.HeadTracker
• type Config
• type Heads
  • func NewHeads() Heads
• type ORM
  • func NewORM(db *sqlx.DB, lggr logger.Logger, cfg pg.LogConfig, chainID big.Int) ORM

Constants

const HeadsBufferSize = 10

HeadsBufferSize - The buffer is used when heads sampling is disabled, to ensure the callback is run for every head

const TrackableCallbackTimeout = 2 * time.Second

Variables

var NullSaver httypes.HeadSaver = &nullSaver{}

var NullTracker httypes.HeadTracker = &nullTracker{}

Functions

func NewHeadBroadcaster

func NewHeadBroadcaster(lggr logger.Logger) httypes.HeadBroadcaster

NewHeadBroadcaster creates a new HeadBroadcaster

func NewHeadListener

func NewHeadListener(lggr logger.Logger, ethClient evmclient.Client, config Config, chStop chan struct{}) httypes.HeadListener

NewHeadListener creates a new HeadListener

func NewHeadSaver

func NewHeadSaver(lggr logger.Logger, orm ORM, config Config) httypes.HeadSaver

func NewHeadTracker

func NewHeadTracker(
	lggr logger.Logger,
	ethClient evmclient.Client,
	config Config,
	headBroadcaster httypes.HeadBroadcaster,
	headSaver httypes.HeadSaver,
) httypes.HeadTracker

NewHeadTracker instantiates a new HeadTracker using HeadSaver to persist new block numbers.

Types

type Config

type Config interface {
	BlockEmissionIdleWarningThreshold() time.Duration
	EvmFinalityDepth() uint32
	EvmHeadTrackerHistoryDepth() uint32
	EvmHeadTrackerMaxBufferSize() uint32
	EvmHeadTrackerSamplingInterval() time.Duration
}

Config represents a subset of options needed by head tracker

type Heads

type Heads interface {
	// LatestHead returns the block header with the highest number that has been seen, or nil.
	LatestHead() *evmtypes.Head
	// HeadByHash returns a head for the specified hash, or nil.
	HeadByHash(hash common.Hash) *evmtypes.Head
	// AddHeads adds newHeads to the collection, eliminates duplicates,
	// sorts by head number, fixes parents and cuts off old heads (historyDepth).
	AddHeads(historyDepth uint, newHeads ...*evmtypes.Head)
	// Count returns number of heads in the collection.
	Count() int
}

Heads is a collection of heads. All methods are thread-safe.

func NewHeads

func NewHeads() Heads

type ORM

type ORM interface {
	// IdempotentInsertHead inserts a head only if the hash is new. Will do nothing if hash exists already.
	// No advisory lock required because this is thread safe.
	IdempotentInsertHead(ctx context.Context, head *evmtypes.Head) error
	// TrimOldHeads deletes heads such that only the top N block numbers remain
	TrimOldHeads(ctx context.Context, n uint) (err error)
	// LatestHead returns the highest seen head
	LatestHead(ctx context.Context) (head *evmtypes.Head, err error)
	// LatestHeads returns the latest heads up to given limit
	LatestHeads(ctx context.Context, limit uint) (heads []*evmtypes.Head, err error)
	// HeadByHash fetches the head with the given hash from the db, returns nil if none exists
	HeadByHash(ctx context.Context, hash common.Hash) (head *evmtypes.Head, err error)
}

func NewORM

func NewORM(db *sqlx.DB, lggr logger.Logger, cfg pg.LogConfig, chainID big.Int) ORM