engine

package
v1.16.10 Latest Latest
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 Go to latest Published: Mar 25, 2026 License: MIT, MIT Imports: 20 Imported by: 8

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Index

Constants

This section is empty.

Variables

View Source 
var ErrEngineSyncing = errors.New("engine is syncing")
View Source 
var ErrNoFCUNeeded = errors.New("no FCU call was needed")
View Source 
var Kinds = []Kind{
	Geth,
	Reth,
	Erigon,
}
View Source 
var ReplaceBlockSource = eth.L1BlockRef{
	Hash:       common.HexToHash("0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"),
	Number:     ^uint64(0),
	ParentHash: common.Hash{},
	Time:       0,
}

ReplaceBlockSource is a magic value for the "Source" attribute, used when a L2 block is a replacement of an invalidated block. After the replacement has been processed, a reset is performed to derive the next L2 blocks.

Functions

func ForceEngineReset 

func ForceEngineReset(ec ResetEngineControl, localUnsafe, crossUnsafe, localSafe, crossSafe, finalized eth.L2BlockRef)

func ValidEngineKind 

func ValidEngineKind(value Kind) bool

Types

type AttributesForceResetter 

type AttributesForceResetter interface {
	ForceReset(ctx context.Context, localUnsafe, crossUnsafe, localSafe, crossSafe, finalized eth.L2BlockRef)
}

type BlockInsertionErrType 

type BlockInsertionErrType uint
const (
	// BlockInsertOK indicates that the payload was successfully executed and appended to the canonical chain.
	BlockInsertOK BlockInsertionErrType = iota
	// BlockInsertTemporaryErr indicates that the insertion failed but may succeed at a later time without changes to the payload.
	BlockInsertTemporaryErr
	// BlockInsertPrestateErr indicates that the pre-state to insert the payload could not be prepared, e.g. due to missing chain data.
	BlockInsertPrestateErr
	// BlockInsertPayloadErr indicates that the payload was invalid and cannot become canonical.
	BlockInsertPayloadErr
)

type BuildCancelEvent 

type BuildCancelEvent struct {
	Info  eth.PayloadInfo
	Force bool
}

func (BuildCancelEvent) String 

func (ev BuildCancelEvent) String() string

type BuildInvalidEvent 

type BuildInvalidEvent struct {
	Attributes *derive.AttributesWithParent
	Err        error
}

BuildInvalidEvent is an internal engine event, to post-process upon invalid attributes. Not for temporary processing problems.

func (BuildInvalidEvent) String 

func (ev BuildInvalidEvent) String() string

type BuildSealEvent 

type BuildSealEvent struct {
	Info         eth.PayloadInfo
	BuildStarted time.Time
	// if payload should be promoted to safe (must also be pending safe, see DerivedFrom)
	Concluding bool
	// payload is promoted to pending-safe if non-zero
	DerivedFrom eth.L1BlockRef
}

func (BuildSealEvent) String 

func (ev BuildSealEvent) String() string

type BuildSealedEvent 

type BuildSealedEvent struct {
	// if payload should be promoted to (local) safe (must also be pending safe, see DerivedFrom)
	Concluding bool
	// payload is promoted to pending-safe if non-zero
	DerivedFrom  eth.L1BlockRef
	BuildStarted time.Time

	Info     eth.PayloadInfo
	Envelope *eth.ExecutionPayloadEnvelope
	Ref      eth.L2BlockRef
}

BuildSealedEvent is emitted by the engine when a payload finished building, but is not locally inserted as canonical block yet

func (BuildSealedEvent) String 

func (ev BuildSealedEvent) String() string

type BuildStartEvent 

type BuildStartEvent struct {
	Attributes *derive.AttributesWithParent
}

func (BuildStartEvent) String 

func (ev BuildStartEvent) String() string

type BuildStartedEvent 

type BuildStartedEvent struct {
	Info eth.PayloadInfo

	BuildStarted time.Time

	Parent eth.L2BlockRef

	// if payload should be promoted to (local) safe (must also be pending safe, see DerivedFrom)
	Concluding bool
	// payload is promoted to pending-safe if non-zero
	DerivedFrom eth.L1BlockRef
}

func (BuildStartedEvent) String 

func (ev BuildStartedEvent) String() string

type CrossUpdateHandler 

type CrossUpdateHandler interface {
	OnCrossUnsafeUpdate(ctx context.Context, crossUnsafe eth.L2BlockRef, localUnsafe eth.L2BlockRef)
	OnCrossSafeUpdate(ctx context.Context, crossSafe eth.L2BlockRef, localSafe eth.L2BlockRef)
}

CrossUpdateHandler handles both cross-unsafe and cross-safe L2 head changes. Nil check required because op-program omits this handler.

type Engine 

type Engine interface {
	ExecEngine
	derive.L2Source
}

type EngineController 

type EngineController struct {

	// For clearing safe head db when EL sync started
	// EngineController is first initialized and used to initialize SyncDeriver.
	// Embed SyncDeriver into EngineController after initializing SyncDeriver
	SyncDeriver SyncDeriver
	// contains filtered or unexported fields
}

func NewEngineController 

func NewEngineController(ctx context.Context, engine ExecEngine, log log.Logger, m opmetrics.Metricer,
	rollupCfg *rollup.Config, syncCfg *sync.Config, supervisorEnabled bool, l1 sync.L1Chain, emitter event.Emitter,
	superAuthority rollup.SuperAuthority,
) *EngineController

func (*EngineController) AddUnsafePayload 

func (e *EngineController) AddUnsafePayload(ctx context.Context, envelope *eth.ExecutionPayloadEnvelope)

AddUnsafePayload schedules an execution payload to be processed, ahead of deriving it from L1.

func (*EngineController) BackupUnsafeL2Head 

func (e *EngineController) BackupUnsafeL2Head() eth.L2BlockRef

func (*EngineController) CancelBlock 

func (e *EngineController) CancelBlock(ctx context.Context, id eth.PayloadInfo) error

func (*EngineController) CommitBlock 

func (e *EngineController) CommitBlock(ctx context.Context, signed *opsigner.SignedExecutionPayloadEnvelope) error

func (*EngineController) Finalized 

func (e *EngineController) Finalized() eth.L2BlockRef

func (*EngineController) FinalizedHead 

func (e *EngineController) FinalizedHead() eth.L2BlockRef

func (*EngineController) FollowSource 

func (e *EngineController) FollowSource(eSafeBlockRef, eLocalSafeRef, eFinalizedRef eth.L2BlockRef)

func (*EngineController) ForceReset 

func (e *EngineController) ForceReset(ctx context.Context, localUnsafe, crossUnsafe, localSafe, crossSafe, finalized eth.L2BlockRef)

ForceReset performs a forced reset to the specified block references, acquiring lock

func (*EngineController) InsertUnsafePayload 

func (e *EngineController) InsertUnsafePayload(ctx context.Context, envelope *eth.ExecutionPayloadEnvelope, ref eth.L2BlockRef) error

func (*EngineController) IsEngineInitialELSyncing 

func (e *EngineController) IsEngineInitialELSyncing() bool

func (*EngineController) OnEvent 

func (e *EngineController) OnEvent(ctx context.Context, ev event.Event) bool

func (*EngineController) OpenBlock 

func (e *EngineController) OpenBlock(ctx context.Context, parent eth.BlockID, attrs *eth.PayloadAttributes) (eth.PayloadInfo, error)

func (*EngineController) PeekUnsafePayload 

func (e *EngineController) PeekUnsafePayload() (*eth.ExecutionPayloadEnvelope, eth.L2BlockRef)

func (*EngineController) PendingSafeL2Head 

func (e *EngineController) PendingSafeL2Head() eth.L2BlockRef

func (*EngineController) PromoteFinalized 

func (e *EngineController) PromoteFinalized(ctx context.Context, ref eth.L2BlockRef)

func (*EngineController) PromoteSafe 

func (e *EngineController) PromoteSafe(ctx context.Context, ref eth.L2BlockRef, source eth.L1BlockRef)

func (*EngineController) RequestForkchoiceUpdate 

func (e *EngineController) RequestForkchoiceUpdate(ctx context.Context)

func (*EngineController) RequestPendingSafeUpdate 

func (e *EngineController) RequestPendingSafeUpdate(ctx context.Context)

func (*EngineController) SafeL2Head 

func (e *EngineController) SafeL2Head() eth.L2BlockRef

SafeL2Head returns the safe L2 head. If the super authority is enabled, it returns the fully verified L2 head else it returns the local safe L2 head.

func (*EngineController) SealBlock 

func (e *EngineController) SealBlock(ctx context.Context, id eth.PayloadInfo) (*eth.ExecutionPayloadEnvelope, error)

func (*EngineController) SetAttributesResetter 

func (e *EngineController) SetAttributesResetter(resetter AttributesForceResetter)

SetAttributesResetter sets the attributes component that needs force reset notifications

func (*EngineController) SetBackupUnsafeL2Head 

func (e *EngineController) SetBackupUnsafeL2Head(r eth.L2BlockRef, triggerReorg bool)

SetBackupUnsafeL2Head implements LocalEngineControl.

func (*EngineController) SetCrossUnsafeHead 

func (e *EngineController) SetCrossUnsafeHead(r eth.L2BlockRef)

SetCrossUnsafeHead the cross-unsafe head.

func (*EngineController) SetCrossUpdateHandler 

func (e *EngineController) SetCrossUpdateHandler(handler CrossUpdateHandler)

func (*EngineController) SetFinalizedHead 

func (e *EngineController) SetFinalizedHead(r eth.L2BlockRef)

SetFinalizedHead implements LocalEngineControl.

func (*EngineController) SetLocalSafeHead 

func (e *EngineController) SetLocalSafeHead(r eth.L2BlockRef)

SetLocalSafeHead sets the local-safe head.

func (*EngineController) SetOriginSelectorResetter 

func (e *EngineController) SetOriginSelectorResetter(resetter OriginSelectorForceResetter)

SetOriginSelectorResetter sets the origin selector component that needs force reset notifications

func (*EngineController) SetPendingSafeL2Head 

func (e *EngineController) SetPendingSafeL2Head(r eth.L2BlockRef)

SetPendingSafeL2Head implements LocalEngineControl.

func (*EngineController) SetPipelineResetter 

func (e *EngineController) SetPipelineResetter(resetter PipelineForceResetter)

SetPipelineResetter sets the pipeline component that needs force reset notifications

func (*EngineController) SetSafeHead 

func (e *EngineController) SetSafeHead(r eth.L2BlockRef)

SetSafeHead sets the cross-safe head.

func (*EngineController) SetUnsafeHead 

func (e *EngineController) SetUnsafeHead(r eth.L2BlockRef)

SetUnsafeHead sets the local-unsafe head.

func (*EngineController) TryBackupUnsafeReorg 

func (e *EngineController) TryBackupUnsafeReorg(ctx context.Context) (bool, error)

func (*EngineController) TryInitialResetEngineForSequencer 

func (e *EngineController) TryInitialResetEngineForSequencer(ctx context.Context)

TryInitialResetEngineForSequencer resets engine controller with the info from FindL2Heads and only propagates ForkchoiceUpdateEvent info to the sequencer to trigger sequencer block building, but not propagating ForkchoiceUpdateEvent to other event Deriver avoiding side effects

func (*EngineController) TryUpdateEngine 

func (e *EngineController) TryUpdateEngine(ctx context.Context)

func (*EngineController) TryUpdateLocalSafe 

func (e *EngineController) TryUpdateLocalSafe(ctx context.Context, ref eth.L2BlockRef, concluding bool, source eth.L1BlockRef)

TryUpdateLocalSafe updates the local safe head if the new reference is newer and concluding, acquiring lock

func (*EngineController) TryUpdatePendingSafe 

func (e *EngineController) TryUpdatePendingSafe(ctx context.Context, ref eth.L2BlockRef, concluding bool, source eth.L1BlockRef)

TryUpdatePendingSafe updates the pending safe head if the new reference is newer, acquiring lock

func (*EngineController) UnsafeL2Head 

func (e *EngineController) UnsafeL2Head() eth.L2BlockRef

type EngineResetConfirmedEvent 

type EngineResetConfirmedEvent struct {
	LocalUnsafe eth.L2BlockRef
	CrossUnsafe eth.L2BlockRef
	LocalSafe   eth.L2BlockRef
	CrossSafe   eth.L2BlockRef
	Finalized   eth.L2BlockRef
}

func (EngineResetConfirmedEvent) String 

func (ev EngineResetConfirmedEvent) String() string

type ExecEngine 

type ExecEngine interface {
	GetPayload(ctx context.Context, payloadInfo eth.PayloadInfo) (*eth.ExecutionPayloadEnvelope, error)
	ForkchoiceUpdate(ctx context.Context, state *eth.ForkchoiceState, attr *eth.PayloadAttributes) (*eth.ForkchoiceUpdatedResult, error)
	NewPayload(ctx context.Context, payload *eth.ExecutionPayload, parentBeaconBlockRoot *common.Hash) (*eth.PayloadStatusV1, error)
	L2BlockRefByLabel(ctx context.Context, label eth.BlockLabel) (eth.L2BlockRef, error)
	L2BlockRefByHash(ctx context.Context, hash common.Hash) (eth.L2BlockRef, error)
	L2BlockRefByNumber(ctx context.Context, num uint64) (eth.L2BlockRef, error)
}

type FinalizedUpdateEvent 

type FinalizedUpdateEvent struct {
	Ref eth.L2BlockRef
}

FinalizedUpdateEvent signals that a block has been marked as finalized.

func (FinalizedUpdateEvent) String 

func (ev FinalizedUpdateEvent) String() string

type ForkchoiceUpdateEvent 

type ForkchoiceUpdateEvent struct {
	UnsafeL2Head, SafeL2Head, FinalizedL2Head eth.L2BlockRef
}

func (ForkchoiceUpdateEvent) String 

func (ev ForkchoiceUpdateEvent) String() string

type ForkchoiceUpdateInitEvent 

type ForkchoiceUpdateInitEvent struct {
	UnsafeL2Head, SafeL2Head, FinalizedL2Head eth.L2BlockRef
}

ForkchoiceUpdateInitEvent is only for the sequencer to be signaled during initialization

func (ForkchoiceUpdateInitEvent) String 

func (ev ForkchoiceUpdateInitEvent) String() string

type InteropInvalidateBlockEvent 

type InteropInvalidateBlockEvent struct {
	Invalidated eth.BlockRef
	Attributes  *derive.AttributesWithParent
}

InteropInvalidateBlockEvent is emitted when a block needs to be invalidated, and a replacement is needed.

func (InteropInvalidateBlockEvent) String 

func (ev InteropInvalidateBlockEvent) String() string

type InteropReplacedBlockEvent 

type InteropReplacedBlockEvent struct {
	Ref      eth.BlockRef
	Envelope *eth.ExecutionPayloadEnvelope
}

InteropReplacedBlockEvent is emitted when a replacement is done.

func (InteropReplacedBlockEvent) String 

func (ev InteropReplacedBlockEvent) String() string

type InvalidPayloadAttributesEvent 

type InvalidPayloadAttributesEvent struct {
	Attributes *derive.AttributesWithParent
	Err        error
}

InvalidPayloadAttributesEvent is a signal to external derivers that the attributes were invalid.

func (InvalidPayloadAttributesEvent) String 

func (ev InvalidPayloadAttributesEvent) String() string

type Kind 

type Kind string

Kind identifies the engine client's kind, used to control the behavior of optimism in different engine clients. 

const (
	Geth   Kind = "geth"
	Reth   Kind = "reth"
	Erigon Kind = "erigon"
)

func (*Kind) Clone 

func (kind *Kind) Clone() any

func (*Kind) Set 

func (kind *Kind) Set(value string) error

func (Kind) String 

func (kind Kind) String() string

func (Kind) SupportsPostFinalizationELSync 

func (kind Kind) SupportsPostFinalizationELSync() bool

type LocalSafeUpdateEvent 

type LocalSafeUpdateEvent struct {
	Ref    eth.L2BlockRef
	Source eth.L1BlockRef
}

LocalSafeUpdateEvent signals that a block is now considered to be local-safe.

func (LocalSafeUpdateEvent) String 

func (ev LocalSafeUpdateEvent) String() string

type Metrics 

type Metrics interface {
	RecordUnsafePayloadsBuffer(length uint64, memSize uint64, next eth.BlockID)
}

Metrics interface for CLSync functionality

type OriginSelectorForceResetter 

type OriginSelectorForceResetter interface {
	ResetOrigins()
}

type PayloadInvalidEvent 

type PayloadInvalidEvent struct {
	Envelope *eth.ExecutionPayloadEnvelope
	Err      error
}

func (PayloadInvalidEvent) String 

func (ev PayloadInvalidEvent) String() string

type PayloadProcessEvent 

type PayloadProcessEvent struct {
	// if payload should be promoted to (local) safe (must also be pending safe, see DerivedFrom)
	Concluding bool
	// payload is promoted to pending-safe if non-zero
	DerivedFrom  eth.L1BlockRef
	BuildStarted time.Time

	Envelope *eth.ExecutionPayloadEnvelope
	Ref      eth.L2BlockRef
}

func (PayloadProcessEvent) String 

func (ev PayloadProcessEvent) String() string

type PayloadSealExpiredErrorEvent 

type PayloadSealExpiredErrorEvent struct {
	Info eth.PayloadInfo
	Err  error

	Concluding  bool
	DerivedFrom eth.L1BlockRef
}

PayloadSealExpiredErrorEvent identifies a form of failed payload-sealing that is not coupled to the attributes themselves, but rather the build-job process. The user should re-attempt by starting a new build process. The payload-sealing job should not be re-attempted, as it most likely expired, timed out, or referenced an otherwise invalidated block-building job identifier.

func (PayloadSealExpiredErrorEvent) String 

func (ev PayloadSealExpiredErrorEvent) String() string

type PayloadSealInvalidEvent 

type PayloadSealInvalidEvent struct {
	Info eth.PayloadInfo
	Err  error

	Concluding  bool
	DerivedFrom eth.L1BlockRef
}

PayloadSealInvalidEvent identifies a permanent in-consensus problem with the payload sealing.

func (PayloadSealInvalidEvent) String 

func (ev PayloadSealInvalidEvent) String() string

type PayloadSuccessEvent 

type PayloadSuccessEvent struct {
	// if payload should be promoted to (local) safe (must also be pending safe, see DerivedFrom)
	Concluding bool
	// payload is promoted to pending-safe if non-zero
	DerivedFrom   eth.L1BlockRef
	BuildStarted  time.Time
	InsertStarted time.Time

	Envelope *eth.ExecutionPayloadEnvelope
	Ref      eth.L2BlockRef
}

func (PayloadSuccessEvent) String 

func (ev PayloadSuccessEvent) String() string

type PayloadsQueue 

type PayloadsQueue struct {
	MaxSize uint64

	SizeFn func(p *eth.ExecutionPayloadEnvelope) uint64
	// contains filtered or unexported fields
}

PayloadsQueue buffers payloads by block number. PayloadsQueue is not safe to use concurrently. PayloadsQueue exposes typed Push/Peek/Pop methods to use the queue, without the need to use heap.Push/heap.Pop as caller. PayloadsQueue maintains a MaxSize by counting and tracking sizes of added eth.ExecutionPayload entries. When the size grows too large, the first (lowest block-number) payload is removed from the queue. PayloadsQueue allows entries with same block number, but does not allow duplicate blocks

func NewPayloadsQueue 

func NewPayloadsQueue(log log.Logger, maxSize uint64, sizeFn func(p *eth.ExecutionPayloadEnvelope) uint64) *PayloadsQueue

func (*PayloadsQueue) DropInapplicableUnsafePayloads 

func (pq *PayloadsQueue) DropInapplicableUnsafePayloads(event ForkchoiceUpdateEvent)

func (*PayloadsQueue) Len 

func (upq *PayloadsQueue) Len() int

func (*PayloadsQueue) MemSize 

func (upq *PayloadsQueue) MemSize() uint64

func (*PayloadsQueue) Peek 

func (upq *PayloadsQueue) Peek() *eth.ExecutionPayloadEnvelope

Peek retrieves the payload with the lowest block number from the queue in O(1), or nil if the queue is empty.

func (*PayloadsQueue) Pop 

func (upq *PayloadsQueue) Pop() *eth.ExecutionPayloadEnvelope

Pop removes the payload with the lowest block number from the queue in O(log(N)), and may return nil if the queue is empty.

func (*PayloadsQueue) Push 

func (upq *PayloadsQueue) Push(e *eth.ExecutionPayloadEnvelope) error

Push adds the payload to the queue, in O(log(N)).

Don't DoS ourselves by buffering too many unsafe payloads. If the queue size after pushing exceed the allowed memory, then pop payloads until memory is not exceeding anymore.

We prefer higher block numbers over lower block numbers, since lower block numbers are more likely to be conflicts and/or read from L1 sooner. The higher payload block numbers can be preserved, and once L1 contents meets these, they can all be processed in order.

type PendingSafeUpdateEvent 

type PendingSafeUpdateEvent struct {
	PendingSafe eth.L2BlockRef
	Unsafe      eth.L2BlockRef // tip, added to the signal, to determine if there are existing blocks to consolidate
}

func (PendingSafeUpdateEvent) String 

func (ev PendingSafeUpdateEvent) String() string

type PipelineForceResetter 

type PipelineForceResetter interface {
	ResetPipeline()
}

type PromoteCrossUnsafeEvent 

type PromoteCrossUnsafeEvent struct {
	Ref eth.L2BlockRef
}

PromoteCrossUnsafeEvent signals that the given block may be promoted to cross-unsafe.

func (PromoteCrossUnsafeEvent) String 

func (ev PromoteCrossUnsafeEvent) String() string

type ResetEngineControl 

type ResetEngineControl interface {
	SetUnsafeHead(eth.L2BlockRef)
	SetCrossUnsafeHead(ref eth.L2BlockRef)
	SetLocalSafeHead(ref eth.L2BlockRef)
	SetSafeHead(eth.L2BlockRef)
	SetFinalizedHead(eth.L2BlockRef)
	SetBackupUnsafeL2Head(block eth.L2BlockRef, triggerReorg bool)
	SetPendingSafeL2Head(eth.L2BlockRef)
}

type ResetEngineRequestEvent 

type ResetEngineRequestEvent struct {
}

ResetEngineRequestEvent requests the EngineController to walk the L2 chain backwards until it finds a plausible unsafe head, and find an L2 safe block that is guaranteed to still be from the L1 chain. This event is not used in interop.

func (ResetEngineRequestEvent) String 

func (ev ResetEngineRequestEvent) String() string

type RollupAPI 

type RollupAPI interface {
	apis.BuildAPI
	apis.CommitAPI
}

RollupAPI is the API we serve as rollup-node to interact with the execution engine and forkchoice state.

type SafeDerivedEvent 

type SafeDerivedEvent struct {
	Safe   eth.L2BlockRef
	Source eth.L1BlockRef
}

SafeDerivedEvent signals that a block was determined to be safe, and derived from the given L1 block. This is signaled upon procedural call of PromoteSafe method

func (SafeDerivedEvent) String 

func (ev SafeDerivedEvent) String() string

type SyncDeriver 

type SyncDeriver interface {
	OnELSyncStarted()
}

type UnsafeUpdateEvent 

type UnsafeUpdateEvent struct {
	Ref eth.L2BlockRef
}

UnsafeUpdateEvent signals that the given block is now considered safe. This is pre-forkchoice update; the change may not be reflected yet in the EL.

func (UnsafeUpdateEvent) String 

func (ev UnsafeUpdateEvent) String() string

Source Files

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