state

package
v0.0.1 Latest Latest
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 Go to latest Published: Jun 7, 2021 License: Apache-2.0 Imports: 26 Imported by: 0

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Index

Constants

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

Variables

View Source 
var InitStateVersion = tmstate.Version{
	Consensus: tmversion.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 *tmstate.ABCIResponses) []byte

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

See merkle.SimpleHashFromByteSlices

func BootstrapState 

func BootstrapState(db dbm.DB, state State) error

BootstrapState saves a new state, used e.g. by state sync when starting from non-zero height.

func ExecCommitBlock 

func ExecCommitBlock(
	appConnConsensus proxy.AppConnConsensus,
	block *types.Block,
	logger log.Logger,
	stateDB dbm.DB,
	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 LoadABCIResponses 

func LoadABCIResponses(db dbm.DB, height int64) (*tmstate.ABCIResponses, error)

LoadABCIResponses loads the ABCIResponses for the given height from the database. If not found, ErrNoABCIResponsesForHeight is returned.

This is useful for recovering from crashes where we called app.Commit and before we called s.Save(). It can also be used to produce Merkle proofs of the result of txs.

func LoadConsensusParams 

func LoadConsensusParams(db dbm.DB, height int64) (tmproto.ConsensusParams, error)

LoadConsensusParams loads the ConsensusParams for a given height.

func LoadValidators 

func LoadValidators(db dbm.DB, height int64) (*types.ValidatorSet, error)

LoadValidators loads the ValidatorSet for a given height. Returns ErrNoValSetForHeight if the validator set can't be found for this height.

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 PruneStates 

func PruneStates(db dbm.DB, from int64, to int64) error

PruneStates deletes states between the given heights (including from, excluding to). It is not guaranteed to delete all states, since the last checkpointed state and states being pointed to by e.g. `LastHeightChanged` must remain. The state at to must also exist.

The from parameter is necessary since we can't do a key scan in a performant way due to the key encoding not preserving ordering: https://github.com/mydexchain/tendermint0/issues/4567 This will cause some old states to be left behind when doing incremental partial prunes, specifically older checkpoints and LastHeightChanged targets.

func SaveABCIResponses 

func SaveABCIResponses(db dbm.DB, height int64, abciResponses *tmstate.ABCIResponses)

SaveABCIResponses persists the ABCIResponses to the database. This is useful in case we crash after app.Commit and before s.Save(). Responses are indexed by height so they can also be loaded later to produce Merkle proofs.

Exposed for testing.

func SaveState 

func SaveState(db dbm.DB, state State)

SaveState persists the State, the ValidatorsInfo, and the ConsensusParamsInfo to the database. This flushes the writes (e.g. calls SetSync).

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.

func VerifyEvidence 

func VerifyEvidence(stateDB dbm.DB, state State, evidence types.Evidence, committedHeader *types.Header) error

VerifyEvidence verifies the evidence fully by checking: - it is sufficiently recent (MaxAge) - it is from a key who was a validator at the given height - it is internally consistent - it was properly signed by the alleged equivocator

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(
	db dbm.DB,
	logger log.Logger,
	proxyApp proxy.AppConnConsensus,
	mempool mempl.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, *types.PartSet)

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 allcoated for maximum sized evidence. The rest is given to txs, up to the max gas.

func (*BlockExecutor) DB 

func (blockExec *BlockExecutor) DB() dbm.DB

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) 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

	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
	LoadBlockPart(height int64, index int) *types.Part

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

BlockStore defines the interface used by the ConsensusState.

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(uint32) []types.Evidence
	AddEvidence(types.Evidence) error
	Update(*types.Block, State)
	IsCommitted(types.Evidence) bool
	IsPending(types.Evidence) bool
	Header(int64) *types.Header
}

EvidencePool defines the EvidencePool interface used by the ConsensusState. Get/Set/Commit

type Metrics 

type Metrics struct {
	// Time between BeginBlock and EndBlock.
	BlockProcessingTime metrics.Histogram
}

Metrics contains metrics exposed by this package.

func NopMetrics 

func NopMetrics() *Metrics

NopMetrics returns no-op Metrics.

func PrometheusMetrics 

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

PrometheusMetrics returns Metrics build using Prometheus client library. Optionally, labels can be provided along with their values ("foo", "fooValue").

type MockEvidencePool 

type MockEvidencePool struct{}

MockEvidencePool is an empty implementation of EvidencePool, useful for testing.

func (MockEvidencePool) AddEvidence 

func (me MockEvidencePool) AddEvidence(types.Evidence) error

func (MockEvidencePool) Header 

func (me MockEvidencePool) Header(int64) *types.Header

func (MockEvidencePool) IsCommitted 

func (me MockEvidencePool) IsCommitted(types.Evidence) bool

func (MockEvidencePool) IsPending 

func (me MockEvidencePool) IsPending(types.Evidence) bool

func (MockEvidencePool) PendingEvidence 

func (me MockEvidencePool) PendingEvidence(uint32) []types.Evidence

func (MockEvidencePool) Update 

func (me MockEvidencePool) Update(*types.Block, State)

type State 

type State struct {
	Version tmstate.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                  tmproto.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 Tendermint consensus. 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 LoadState 

func LoadState(db dbm.DB) State

LoadState loads the State from the database.

func LoadStateFromDBOrGenesisDoc 

func LoadStateFromDBOrGenesisDoc(stateDB dbm.DB, genesisDoc *types.GenesisDoc) (State, error)

LoadStateFromDBOrGenesisDoc loads the most recent state from the database, or creates a new one from the given genesisDoc.

func LoadStateFromDBOrGenesisFile 

func LoadStateFromDBOrGenesisFile(stateDB dbm.DB, genesisFilePath string) (State, error)

LoadStateFromDBOrGenesisFile loads the most recent state from the database, or creates a new one from the given genesisFilePath.

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 StateFromProto 

func StateFromProto(pb *tmstate.State) (*State, error)

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

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,
	commit *types.Commit,
	evidence []types.Evidence,
	proposerAddress []byte,
) (*types.Block, *types.PartSet)

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() (*tmstate.State, error)

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

Source Files

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