synchronization

Documentation

Index

• type Config
  • func DefaultConfig() *Config
• type Engine
  • func New(log zerolog.Logger, metrics module.EngineMetrics, net module.Network, ...) (*Engine, error)
  • func (e *Engine) Done() <-chan struct{}
  • func (e *Engine) OnFinalizedBlock(flow.Identifier)
  • func (e *Engine) Process(originID flow.Identifier, event interface{}) error
  • func (e *Engine) ProcessLocal(event interface{}) error
  • func (e *Engine) Ready() <-chan struct{}
  • func (e *Engine) Submit(originID flow.Identifier, event interface{})
  • func (e *Engine) SubmitLocal(event interface{})
• type OptionFunc
  • func WithPollInterval(interval time.Duration) OptionFunc
  • func WithScanInterval(interval time.Duration) OptionFunc
• type RequestHeap
  • func NewRequestHeap(limit uint) *RequestHeap
  • func (q *RequestHeap) Get() (*engine.Message, bool)
  • func (q *RequestHeap) Put(message *engine.Message) bool

Types

type Config

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

func DefaultConfig

func DefaultConfig() *Config

type Engine

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

Engine is the synchronization engine, responsible for synchronizing chain state.

func New

func New(
	log zerolog.Logger,
	metrics module.EngineMetrics,
	net module.Network,
	me module.Local,
	state protocol.State,
	blocks storage.Blocks,
	comp network.Engine,
	core module.SyncCore,
	opts ...OptionFunc,
) (*Engine, error)

New creates a new main chain synchronization engine.

func (*Engine) Done

func (e *Engine) Done() <-chan struct{}

Done returns a done channel that is closed once the engine has fully stopped. For the consensus engine, we wait for hotstuff to finish.

func (*Engine) OnFinalizedBlock

func (e *Engine) OnFinalizedBlock(flow.Identifier)

OnFinalizedBlock implements the `OnFinalizedBlock` callback from the `hotstuff.FinalizationConsumer`

(1) Updates local state of last finalized snapshot.

CAUTION: the input to this callback is treated as trusted; precautions should be taken that messages from external nodes cannot be considered as inputs to this function

func (*Engine) Process

func (e *Engine) Process(originID flow.Identifier, event interface{}) error

Process processes the given event from the node with the given origin ID in a blocking manner. It returns the potential processing error when done.

func (*Engine) ProcessLocal

func (e *Engine) ProcessLocal(event interface{}) error

ProcessLocal processes an event originating on the local node.

func (*Engine) Ready

func (e *Engine) Ready() <-chan struct{}

Ready returns a ready channel that is closed once the engine has fully started. For consensus engine, this is true once the underlying consensus algorithm has started.

func (*Engine) Submit

func (e *Engine) Submit(originID flow.Identifier, event interface{})

Submit submits the given event from the node with the given origin ID for processing in a non-blocking manner. It returns instantly and logs a potential processing error internally when done.

func (*Engine) SubmitLocal

func (e *Engine) SubmitLocal(event interface{})

SubmitLocal submits an event originating on the local node.

type OptionFunc

type OptionFunc func(*Config)

func WithPollInterval

func WithPollInterval(interval time.Duration) OptionFunc

WithPollInterval sets a custom interval at which we scan for poll items

func WithScanInterval

func WithScanInterval(interval time.Duration) OptionFunc

WithScanInterval sets a custom interval at which we scan for pending items and batch them for requesting.

type RequestHeap

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

RequestHeap is a special structure that implements engine.MessageStore interface and indexes requests by originator. If request will be sent by same originator then it will replace the old one. Comparing to default FIFO queue this one can contain MAX one request for origin ID. Getting value from queue as well as ejecting is pseudo-random.

func NewRequestHeap

func NewRequestHeap(limit uint) *RequestHeap

func (*RequestHeap) Get

func (q *RequestHeap) Get() (*engine.Message, bool)

Get returns pseudo-random element from request storage using go map properties.

func (*RequestHeap) Put

func (q *RequestHeap) Put(message *engine.Message) bool

Put stores message into requests map using OriginID as key. Returns always true