state

package
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 Go to latest Published: Nov 23, 2024 License: Apache-2.0 Imports: 26 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// MetricsSubsystem is a subsystem shared by all metrics exposed by this
	// package.
	MetricsSubsystem = "state"
)

Variables

View Source 
var ErrABCIResponsesNotPersisted = errors.New("node is not persisting abci responses")
View Source 
var InitStateVersion = cmtstate.Version{
	Consensus: cmtversion.Consensus{
		Block: version.BlockProtocol,
		App:   0,
	},
	Software: version.TMCoreSemVer,
}

InitStateVersion sets the Consensus.Block and Software versions, but leaves the Consensus.App version blank. The Consensus.App version will be set during the Handshake, once we hear from the app what protocol version it is running.

Functions

func ABCIResponsesResultsHash 

func ABCIResponsesResultsHash(ar *cmtstate.ABCIResponses) []byte

ABCIResponsesResultsHash returns the root hash of a Merkle tree of ResponseDeliverTx responses (see ABCIResults.Hash)

See merkle.SimpleHashFromByteSlices

func ExecCommitBlock 

func ExecCommitBlock(
	appConnConsensus proxy.AppConnConsensus,
	block *types.Block,
	logger log.Logger,
	store Store,
	initialHeight int64,
) ([]byte, error)

ExecCommitBlock executes and commits a block on the proxyApp without validating or mutating the state. It returns the application root hash (result of abci.Commit).

func MakeGenesisDocFromFile 

func MakeGenesisDocFromFile(genDocFile string) (*types.GenesisDoc, error)

MakeGenesisDocFromFile reads and unmarshals genesis doc from the given file.

func MedianTime 

func MedianTime(commit *types.Commit, validators *types.ValidatorSet) time.Time

MedianTime computes a median time for a given Commit (based on Timestamp field of votes messages) and the corresponding validator set. The computed time is always between timestamps of the votes sent by honest processes, i.e., a faulty processes can not arbitrarily increase or decrease the computed value.

func Rollback 

func Rollback(bs BlockStore, ss Store, removeBlock bool) (int64, []byte, error)

Rollback overwrites the current CometBFT state (height n) with the most recent previous state (height n - 1). Note that this function does not affect application state.

func TxPostCheck 

func TxPostCheck(state State) mempl.PostCheckFunc

TxPostCheck returns a function to filter transactions after processing. The function limits the gas wanted by a transaction to the block's maximum total gas.

func TxPreCheck 

func TxPreCheck(state State) mempl.PreCheckFunc

TxPreCheck returns a function to filter transactions before processing. The function limits the size of a transaction to the block's maximum data size.

Types

type BlockExecutor 

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

BlockExecutor provides the context and accessories for properly executing a block.

func NewBlockExecutor 

func NewBlockExecutor(
	stateStore Store,
	logger log.Logger,
	proxyApp proxy.AppConnConsensus,
	mempool mempool.Mempool,
	evpool EvidencePool,
	options ...BlockExecutorOption,
) *BlockExecutor

NewBlockExecutor returns a new BlockExecutor with a NopEventBus. Call SetEventBus to provide one.

func (*BlockExecutor) ApplyBlock 

func (blockExec *BlockExecutor) ApplyBlock(
	state State, blockID types.BlockID, block *types.Block,
) (State, int64, error)

ApplyBlock validates the block against the state, executes it against the app, fires the relevant events, commits the app, and saves the new state and responses. It returns the new state and the block height to retain (pruning older blocks). It's the only function that needs to be called from outside this package to process and commit an entire block. It takes a blockID to avoid recomputing the parts hash.

func (*BlockExecutor) Commit 

func (blockExec *BlockExecutor) Commit(
	state State,
	block *types.Block,
	deliverTxResponses []*abci.ResponseDeliverTx,
) ([]byte, int64, error)

Commit locks the mempool, runs the ABCI Commit message, and updates the mempool. It returns the result of calling abci.Commit (the AppHash) and the height to retain (if any). The Mempool must be locked during commit and update because state is typically reset on Commit and old txs must be replayed against committed state before new txs are run in the mempool, lest they be invalid.

func (*BlockExecutor) CreateProposalBlock 

func (blockExec *BlockExecutor) CreateProposalBlock(
	height int64,
	state State,
	commit *types.Commit,
	proposerAddr []byte,
) (*types.Block, error)

CreateProposalBlock calls state.MakeBlock with evidence from the evpool and txs from the mempool. The max bytes must be big enough to fit the commit. Up to 1/10th of the block space is allocated for maximum sized evidence. The rest is given to txs, up to the max gas.

Contract: application will not return more bytes than are sent over the wire.

func (*BlockExecutor) ProcessProposal 

func (blockExec *BlockExecutor) ProcessProposal(
	block *types.Block,
	state State,
) (bool, error)

func (*BlockExecutor) SetEventBus 

func (blockExec *BlockExecutor) SetEventBus(eventBus types.BlockEventPublisher)

SetEventBus - sets the event bus for publishing block related events. If not called, it defaults to types.NopEventBus.

func (*BlockExecutor) Store 

func (blockExec *BlockExecutor) Store() Store

func (*BlockExecutor) ValidateBlock 

func (blockExec *BlockExecutor) ValidateBlock(state State, block *types.Block) error

ValidateBlock validates the given block against the given state. If the block is invalid, it returns an error. Validation does not mutate state, but does require historical information from the stateDB, ie. to verify evidence from a validator at an old height.

type BlockExecutorOption 

type BlockExecutorOption func(executor *BlockExecutor)

func BlockExecutorWithMetrics 

func BlockExecutorWithMetrics(metrics *Metrics) BlockExecutorOption

type BlockStore 

type BlockStore interface {
	Base() int64
	Height() int64
	Size() int64

	LoadBaseMeta() *types.BlockMeta
	LoadBlockMeta(height int64) *types.BlockMeta
	LoadBlock(height int64) *types.Block

	SaveBlock(block *types.Block, blockParts *types.PartSet, seenCommit *types.Commit)

	PruneBlocks(height int64) (uint64, error)

	LoadBlockByHash(hash []byte) *types.Block
	LoadBlockMetaByHash(hash []byte) *types.BlockMeta
	LoadBlockPart(height int64, index int) *types.Part

	LoadBlockCommit(height int64) *types.Commit
	LoadSeenCommit(height int64) *types.Commit

	DeleteLatestBlock() error
}

BlockStore defines the interface used by the ConsensusState.

type EmptyEvidencePool 

type EmptyEvidencePool struct{}

EmptyEvidencePool is an empty implementation of EvidencePool, useful for testing. It also complies to the consensus evidence pool interface

func (EmptyEvidencePool) AddEvidence 

func (EmptyEvidencePool) AddEvidence(types.Evidence) error

func (EmptyEvidencePool) CheckEvidence 

func (EmptyEvidencePool) CheckEvidence(evList types.EvidenceList) error

func (EmptyEvidencePool) PendingEvidence 

func (EmptyEvidencePool) PendingEvidence(maxBytes int64) (ev []types.Evidence, size int64)

func (EmptyEvidencePool) ReportConflictingVotes 

func (EmptyEvidencePool) ReportConflictingVotes(voteA, voteB *types.Vote)

func (EmptyEvidencePool) Update 

func (EmptyEvidencePool) Update(State, types.EvidenceList)

type ErrAppBlockHeightTooHigh 

type ErrAppBlockHeightTooHigh struct {
	CoreHeight int64
	AppHeight  int64
}

func (ErrAppBlockHeightTooHigh) Error 

func (e ErrAppBlockHeightTooHigh) Error() string

type ErrAppBlockHeightTooLow 

type ErrAppBlockHeightTooLow struct {
	AppHeight int64
	StoreBase int64
}

func (ErrAppBlockHeightTooLow) Error 

func (e ErrAppBlockHeightTooLow) Error() string

type ErrBlockHashMismatch 

type ErrBlockHashMismatch struct {
	CoreHash []byte
	AppHash  []byte
	Height   int64
}

func (ErrBlockHashMismatch) Error 

func (e ErrBlockHashMismatch) Error() string

type ErrInvalidBlock 

type ErrInvalidBlock error

type ErrLastStateMismatch 

type ErrLastStateMismatch struct {
	Height int64
	Core   []byte
	App    []byte
}

func (ErrLastStateMismatch) Error 

func (e ErrLastStateMismatch) Error() string

type ErrNoABCIResponsesForHeight 

type ErrNoABCIResponsesForHeight struct {
	Height int64
}

func (ErrNoABCIResponsesForHeight) Error 

func (e ErrNoABCIResponsesForHeight) Error() string

type ErrNoConsensusParamsForHeight 

type ErrNoConsensusParamsForHeight struct {
	Height int64
}

func (ErrNoConsensusParamsForHeight) Error 

func (e ErrNoConsensusParamsForHeight) Error() string

type ErrNoValSetForHeight 

type ErrNoValSetForHeight struct {
	Height int64
}

func (ErrNoValSetForHeight) Error 

func (e ErrNoValSetForHeight) Error() string

type ErrProxyAppConn 

type ErrProxyAppConn error

type ErrStateMismatch 

type ErrStateMismatch struct {
	Got      *State
	Expected *State
}

func (ErrStateMismatch) Error 

func (e ErrStateMismatch) Error() string

type ErrUnknownBlock 

type ErrUnknownBlock struct {
	Height int64
}

func (ErrUnknownBlock) Error 

func (e ErrUnknownBlock) Error() string

type EvidencePool 

type EvidencePool interface {
	PendingEvidence(maxBytes int64) (ev []types.Evidence, size int64)
	AddEvidence(types.Evidence) error
	Update(State, types.EvidenceList)
	CheckEvidence(types.EvidenceList) error
}

EvidencePool defines the EvidencePool interface used by State.

type Metrics 

type Metrics struct {
	// Time between BeginBlock and EndBlock in ms.
	BlockProcessingTime metrics.Histogram `metrics_buckettype:"lin" metrics_bucketsizes:"1, 10, 10"`

	// ConsensusParamUpdates is the total number of times the application has
	// udated the consensus params since process start.
	ConsensusParamUpdates metrics.Counter

	// ValidatorSetUpdates is the total number of times the application has
	// udated the validator set since process start.
	ValidatorSetUpdates metrics.Counter
}

Metrics contains metrics exposed by this package.

func NopMetrics 

func NopMetrics() *Metrics

func PrometheusMetrics 

func PrometheusMetrics(namespace string, labelsAndValues ...string) *Metrics

type State 

type State struct {
	Version cmtstate.Version

	// immutable
	ChainID       string
	InitialHeight int64 // should be 1, not 0, when starting from height 1

	// LastBlockHeight=0 at genesis (ie. block(H=0) does not exist)
	LastBlockHeight int64
	LastBlockID     types.BlockID
	LastBlockTime   time.Time

	// LastValidators is used to validate block.LastCommit.
	// Validators are persisted to the database separately every time they change,
	// so we can query for historical validator sets.
	// Note that if s.LastBlockHeight causes a valset change,
	// we set s.LastHeightValidatorsChanged = s.LastBlockHeight + 1 + 1
	// Extra +1 due to nextValSet delay.
	NextValidators              *types.ValidatorSet
	Validators                  *types.ValidatorSet
	LastValidators              *types.ValidatorSet
	LastHeightValidatorsChanged int64

	// Consensus parameters used for validating blocks.
	// Changes returned by EndBlock and updated after Commit.
	ConsensusParams                  types.ConsensusParams
	LastHeightConsensusParamsChanged int64

	// Merkle root of the results from executing prev block
	LastResultsHash []byte

	// the latest AppHash we've received from calling abci.Commit()
	AppHash []byte
}

State is a short description of the latest committed block of the consensus protocol. It keeps all information necessary to validate new blocks, including the last validator set and the consensus params. All fields are exposed so the struct can be easily serialized, but none of them should be mutated directly. Instead, use state.Copy() or state.NextState(...). NOTE: not goroutine-safe.

func FromProto 

func FromProto(pb *cmtstate.State) (*State, error)

FromProto takes a state proto message & returns the local state type

func MakeGenesisState 

func MakeGenesisState(genDoc *types.GenesisDoc) (State, error)

MakeGenesisState creates state from types.GenesisDoc.

func MakeGenesisStateFromFile 

func MakeGenesisStateFromFile(genDocFile string) (State, error)

MakeGenesisStateFromFile reads and unmarshals state from the given file.

Used during replay and in tests.

func (State) Bytes 

func (state State) Bytes() []byte

Bytes serializes the State using protobuf. It panics if either casting to protobuf or serialization fails.

func (State) Copy 

func (state State) Copy() State

Copy makes a copy of the State for mutating.

func (State) Equals 

func (state State) Equals(state2 State) bool

Equals returns true if the States are identical.

func (State) IsEmpty 

func (state State) IsEmpty() bool

IsEmpty returns true if the State is equal to the empty State.

func (State) MakeBlock 

func (state State) MakeBlock(
	height int64,
	txs []types.Tx,
	lastCommit *types.Commit,
	evidence []types.Evidence,
	proposerAddress []byte,
) *types.Block

MakeBlock builds a block from the current state with the given txs, commit, and evidence. Note it also takes a proposerAddress because the state does not track rounds, and hence does not know the correct proposer. TODO: fix this!

func (*State) ToProto 

func (state *State) ToProto() (*cmtstate.State, error)

ToProto takes the local state type and returns the equivalent proto type

type Store 

type Store interface {
	// LoadFromDBOrGenesisFile loads the most recent state.
	// If the chain is new it will use the genesis file from the provided genesis file path as the current state.
	LoadFromDBOrGenesisFile(string) (State, error)
	// LoadFromDBOrGenesisDoc loads the most recent state.
	// If the chain is new it will use the genesis doc as the current state.
	LoadFromDBOrGenesisDoc(*types.GenesisDoc) (State, error)
	// Load loads the current state of the blockchain
	Load() (State, error)
	// LoadValidators loads the validator set at a given height
	LoadValidators(int64) (*types.ValidatorSet, error)
	// LoadABCIResponses loads the abciResponse for a given height
	LoadABCIResponses(int64) (*cmtstate.ABCIResponses, error)
	// LoadLastABCIResponse loads the last abciResponse for a given height
	LoadLastABCIResponse(int64) (*cmtstate.ABCIResponses, error)
	// LoadConsensusParams loads the consensus params for a given height
	LoadConsensusParams(int64) (types.ConsensusParams, error)
	// Save overwrites the previous state with the updated one
	Save(State) error
	// SaveABCIResponses saves ABCIResponses for a given height
	SaveABCIResponses(int64, *cmtstate.ABCIResponses) error
	// Bootstrap is used for bootstrapping state when not starting from a initial height.
	Bootstrap(State) error
	// PruneStates takes the height from which to start prning and which height stop at
	PruneStates(int64, int64) error
	// Close closes the connection with the database
	Close() error
}

Store defines the state store interface

It is used to retrieve current state and save and load ABCI responses, validators and consensus parameters

func NewStore 

func NewStore(db dbm.DB, options StoreOptions) Store

NewStore creates the dbStore of the state pkg.

type StoreOptions 

type StoreOptions struct {
	// DiscardABCIResponses determines whether or not the store
	// retains all ABCIResponses. If DiscardABCiResponses is enabled,
	// the store will maintain only the response object from the latest
	// height.
	DiscardABCIResponses bool
}

Source Files

View all Source files

Directories

Path Synopsis
block/kv
block/null
mocks
sink/psql
Package psql implements an event sink backed by a PostgreSQL database.
 Package psql implements an event sink backed by a PostgreSQL database.
kv
mocks
null

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