stategen

package
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 Go to latest Published: Oct 5, 2021 License: GPL-3.0 Imports: 28 Imported by: 0

Documentation

Overview

Package stategen defines functions to regenerate beacon chain states by replaying blocks from a stored state checkpoint, useful for optimization and reducing a beacon node's resource consumption.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type MockStateManager 

type MockStateManager struct {
	StatesByRoot map[[32]byte]state.BeaconState
	StatesBySlot map[types.Slot]state.BeaconState
}

MockStateManager is a fake implementation of StateManager.

func NewMockService 

func NewMockService() *MockStateManager

NewMockService --

func (*MockStateManager) AddStateForRoot 

func (m *MockStateManager) AddStateForRoot(state state.BeaconState, blockRoot [32]byte)

AddStateForRoot --

func (*MockStateManager) AddStateForSlot 

func (m *MockStateManager) AddStateForSlot(state state.BeaconState, slot types.Slot)

AddStateForSlot --

func (*MockStateManager) DisableSaveHotStateToDB 

func (m *MockStateManager) DisableSaveHotStateToDB(_ context.Context) error

DisableSaveHotStateToDB --

func (*MockStateManager) EnableSaveHotStateToDB 

func (m *MockStateManager) EnableSaveHotStateToDB(_ context.Context)

EnableSaveHotStateToDB --

func (*MockStateManager) ForceCheckpoint 

func (m *MockStateManager) ForceCheckpoint(_ context.Context, _ []byte) error

ForceCheckpoint --

func (*MockStateManager) HasState 

func (m *MockStateManager) HasState(_ context.Context, _ [32]byte) (bool, error)

HasState --

func (*MockStateManager) HasStateInCache 

func (m *MockStateManager) HasStateInCache(_ context.Context, _ [32]byte) (bool, error)

HasStateInCache --

func (*MockStateManager) LoadBlocks 

func (m *MockStateManager) LoadBlocks(
	_ context.Context,
	_, _ types.Slot,
	_ [32]byte,
) ([]block.SignedBeaconBlock, error)

LoadBlocks --

func (*MockStateManager) MigrateToCold 

func (m *MockStateManager) MigrateToCold(_ context.Context, _ [32]byte) error

MigrateToCold --

func (*MockStateManager) RecoverStateSummary 

func (m *MockStateManager) RecoverStateSummary(
	_ context.Context,
	_ [32]byte,
) (*ethpb.StateSummary, error)

RecoverStateSummary --

func (*MockStateManager) ReplayBlocks 

func (m *MockStateManager) ReplayBlocks(
	_ context.Context,
	_ state.BeaconState,
	_ []block.SignedBeaconBlock,
	_ types.Slot,
) (state.BeaconState, error)

ReplayBlocks --

func (*MockStateManager) Resume 

func (m *MockStateManager) Resume(_ context.Context) (state.BeaconState, error)

Resume --

func (*MockStateManager) SaveFinalizedState 

func (m *MockStateManager) SaveFinalizedState(_ types.Slot, _ [32]byte, _ state.BeaconState)

SaveFinalizedState --

func (*MockStateManager) SaveState 

func (m *MockStateManager) SaveState(_ context.Context, _ [32]byte, _ state.BeaconState) error

SaveState --

func (*MockStateManager) StateByRoot 

func (m *MockStateManager) StateByRoot(_ context.Context, blockRoot [32]byte) (state.BeaconState, error)

StateByRoot --

func (*MockStateManager) StateByRootInitialSync 

func (m *MockStateManager) StateByRootInitialSync(_ context.Context, _ [32]byte) (state.BeaconState, error)

StateByRootInitialSync --

func (*MockStateManager) StateBySlot 

func (m *MockStateManager) StateBySlot(_ context.Context, slot types.Slot) (state.BeaconState, error)

StateBySlot --

type State 

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

State is a concrete implementation of StateManager.

func New 

func New(beaconDB db.NoHeadAccessDatabase) *State

New returns a new state management object.

func (*State) DisableSaveHotStateToDB 

func (s *State) DisableSaveHotStateToDB(ctx context.Context) error

DisableSaveHotStateToDB exits the mode that saves beacon state to DB for the hot states. This usually gets triggered once there's finality after long duration since finality.

func (*State) EnableSaveHotStateToDB 

func (s *State) EnableSaveHotStateToDB(_ context.Context)

EnableSaveHotStateToDB enters the mode that saves hot beacon state to the DB. This usually gets triggered when there's long duration since finality.

func (*State) ForceCheckpoint 

func (s *State) ForceCheckpoint(ctx context.Context, root []byte) error

ForceCheckpoint initiates a cold state save of the given state. This method does not update the "last archived state" but simply saves the specified state from the root argument into the DB.

func (*State) HasState 

func (s *State) HasState(ctx context.Context, blockRoot [32]byte) (bool, error)

HasState returns true if the state exists in cache or in DB.

func (*State) HasStateInCache 

func (s *State) HasStateInCache(ctx context.Context, blockRoot [32]byte) (bool, error)

HasStateInCache returns true if the state exists in cache.

func (*State) LoadBlocks 

func (s *State) LoadBlocks(ctx context.Context, startSlot, endSlot types.Slot, endBlockRoot [32]byte) ([]block.SignedBeaconBlock, error)

LoadBlocks loads the blocks between start slot and end slot by recursively fetching from end block root. The Blocks are returned in slot-descending order.

func (*State) MigrateToCold 

func (s *State) MigrateToCold(ctx context.Context, fRoot [32]byte) error

MigrateToCold advances the finalized info in between the cold and hot state sections. It moves the recent finalized states from the hot section to the cold section and only preserve the ones that's on archived point.

func (*State) RecoverStateSummary 

func (s *State) RecoverStateSummary(ctx context.Context, blockRoot [32]byte) (*ethpb.StateSummary, error)

RecoverStateSummary recovers state summary object of a given block root by using the saved block in DB.

func (*State) ReplayBlocks 

func (s *State) ReplayBlocks(
	ctx context.Context,
	state state.BeaconState,
	signed []block.SignedBeaconBlock,
	targetSlot types.Slot,
) (state.BeaconState, error)

ReplayBlocks replays the input blocks on the input state until the target slot is reached.

func (*State) Resume 

func (s *State) Resume(ctx context.Context) (state.BeaconState, error)

Resume resumes a new state management object from previously saved finalized check point in DB.

func (*State) SaveFinalizedState 

func (s *State) SaveFinalizedState(fSlot types.Slot, fRoot [32]byte, fState state.BeaconState)

SaveFinalizedState saves the finalized slot, root and state into memory to be used by state gen service. This used for migration at the correct start slot and used for hot state play back to ensure lower bound to start is always at the last finalized state.

func (*State) SaveState 

func (s *State) SaveState(ctx context.Context, root [32]byte, st state.BeaconState) error

SaveState saves the state in the cache and/or DB.

func (*State) StateByRoot 

func (s *State) StateByRoot(ctx context.Context, blockRoot [32]byte) (state.BeaconState, error)

StateByRoot retrieves the state using input block root.

func (*State) StateByRootInitialSync 

func (s *State) StateByRootInitialSync(ctx context.Context, blockRoot [32]byte) (state.BeaconState, error)

StateByRootInitialSync retrieves the state from the DB for the initial syncing phase. It assumes initial syncing using a block list rather than a block tree hence the returned state is not copied. It invalidates cache for parent root because pre state will get mutated. Do not use this method for anything other than initial syncing purpose or block tree is applied.

func (*State) StateBySlot 

func (s *State) StateBySlot(ctx context.Context, slot types.Slot) (state.BeaconState, error)

StateBySlot retrieves the state using input slot.

type StateManager 

type StateManager interface {
	Resume(ctx context.Context) (state.BeaconState, error)
	SaveFinalizedState(fSlot types.Slot, fRoot [32]byte, fState state.BeaconState)
	MigrateToCold(ctx context.Context, fRoot [32]byte) error
	ReplayBlocks(ctx context.Context, state state.BeaconState, signed []block.SignedBeaconBlock, targetSlot types.Slot) (state.BeaconState, error)
	LoadBlocks(ctx context.Context, startSlot, endSlot types.Slot, endBlockRoot [32]byte) ([]block.SignedBeaconBlock, error)
	HasState(ctx context.Context, blockRoot [32]byte) (bool, error)
	HasStateInCache(ctx context.Context, blockRoot [32]byte) (bool, error)
	StateByRoot(ctx context.Context, blockRoot [32]byte) (state.BeaconState, error)
	StateByRootInitialSync(ctx context.Context, blockRoot [32]byte) (state.BeaconState, error)
	StateBySlot(ctx context.Context, slot types.Slot) (state.BeaconState, error)
	RecoverStateSummary(ctx context.Context, blockRoot [32]byte) (*ethpb.StateSummary, error)
	SaveState(ctx context.Context, root [32]byte, st state.BeaconState) error
	ForceCheckpoint(ctx context.Context, root []byte) error
	EnableSaveHotStateToDB(_ context.Context)
	DisableSaveHotStateToDB(ctx context.Context) error
}

StateManager represents a management object that handles the internal logic of maintaining both hot and cold states in DB.

Source Files

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