state

package
v0.26.1 Latest Latest
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 Go to latest Published: Nov 12, 2018 License: Apache-2.0 Imports: 22 Imported by: 0

Documentation

Index

Constants

View Source 
const MetricsSubsystem = "state"

Variables

This section is empty.

Functions

func ExecCommitBlock 

func ExecCommitBlock(
	appConnConsensus proxy.AppConnConsensus,
	block *types.Block,
	logger log.Logger,
	lastValSet *types.ValidatorSet,
	stateDB dbm.DB,
) ([]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 LoadConsensusParams 

func LoadConsensusParams(db dbm.DB, height int64) (types.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 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) 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 ABCIResponses 

type ABCIResponses struct {
	DeliverTx []*abci.ResponseDeliverTx
	EndBlock  *abci.ResponseEndBlock
}

ABCIResponses retains the responses of the various ABCI calls during block processing. It is persisted to disk for each height before calling Commit.

func LoadABCIResponses 

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

LoadABCIResponses loads the ABCIResponses for the given height from the database. 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 NewABCIResponses 

func NewABCIResponses(block *types.Block) *ABCIResponses

NewABCIResponses returns a new ABCIResponses

func (*ABCIResponses) Bytes 

func (arz *ABCIResponses) Bytes() []byte

Bytes serializes the ABCIResponse using go-amino.

func (*ABCIResponses) ResultsHash 

func (arz *ABCIResponses) ResultsHash() []byte

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 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, 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'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,
) ([]byte, 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 an error. 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) 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 {
	BlockStoreRPC
	SaveBlock(block *types.Block, blockParts *types.PartSet, seenCommit *types.Commit)
}

BlockStore defines the BlockStore interface used by the ConsensusState.

type BlockStoreRPC 

type BlockStoreRPC interface {
	Height() int64

	LoadBlockMeta(height int64) *types.BlockMeta
	LoadBlock(height int64) *types.Block
	LoadBlockPart(height int64, index int) *types.Part

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

BlockStoreRPC is the block store interface used by the RPC.

type ConsensusParamsInfo 

type ConsensusParamsInfo struct {
	ConsensusParams   types.ConsensusParams
	LastHeightChanged int64
}

ConsensusParamsInfo represents the latest consensus params, or the last height it changed

func (ConsensusParamsInfo) Bytes 

func (params ConsensusParamsInfo) Bytes() []byte

Bytes serializes the ConsensusParamsInfo using go-amino.

type ErrAppBlockHeightTooHigh 

type ErrAppBlockHeightTooHigh struct {
	CoreHeight int64
	AppHeight  int64
}

func (ErrAppBlockHeightTooHigh) Error 

func (e ErrAppBlockHeightTooHigh) 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(int64) []types.Evidence
	AddEvidence(types.Evidence) error
	Update(*types.Block, State)
}

EvidencePool defines the EvidencePool interface used by the ConsensusState.

type Mempool 

type Mempool interface {
	Lock()
	Unlock()

	Size() int
	CheckTx(types.Tx, func(*abci.Response)) error
	ReapMaxBytesMaxGas(maxBytes, maxGas int64) types.Txs
	Update(int64, types.Txs, mempool.PreCheckFunc, mempool.PostCheckFunc) error
	Flush()
	FlushAppConn() error

	TxsAvailable() <-chan struct{}
	EnableTxsAvailable()
}

Mempool defines the mempool interface as used by the ConsensusState. Updates to the mempool need to be synchronized with committing a block so apps can reset their transient state on Commit

type Metrics 

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

func NopMetrics 

func NopMetrics() *Metrics

func PrometheusMetrics 

func PrometheusMetrics(namespace string) *Metrics

type MockEvidencePool 

type MockEvidencePool struct{}

MockMempool is an empty implementation of a Mempool, useful for testing.

func (MockEvidencePool) AddEvidence 

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

func (MockEvidencePool) PendingEvidence 

func (m MockEvidencePool) PendingEvidence(int64) []types.Evidence

func (MockEvidencePool) Update 

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

type MockMempool 

type MockMempool struct{}

MockMempool is an empty implementation of a Mempool, useful for testing.

func (MockMempool) CheckTx 

func (MockMempool) CheckTx(_ types.Tx, _ func(*abci.Response)) error

func (MockMempool) EnableTxsAvailable 

func (MockMempool) EnableTxsAvailable()

func (MockMempool) Flush 

func (MockMempool) Flush()

func (MockMempool) FlushAppConn 

func (MockMempool) FlushAppConn() error

func (MockMempool) Lock 

func (MockMempool) Lock()

func (MockMempool) ReapMaxBytesMaxGas 

func (MockMempool) ReapMaxBytesMaxGas(_, _ int64) types.Txs

func (MockMempool) Size 

func (MockMempool) Size() int

func (MockMempool) TxsAvailable 

func (MockMempool) TxsAvailable() <-chan struct{}

func (MockMempool) Unlock 

func (MockMempool) Unlock()

func (MockMempool) Update 

func (MockMempool) Update(
	_ int64,
	_ types.Txs,
	_ mempool.PreCheckFunc,
	_ mempool.PostCheckFunc,
) error

type State 

type State struct {
	Version Version

	// immutable
	ChainID string

	// LastBlockHeight=0 at genesis (ie. block(H=0) does not exist)
	LastBlockHeight  int64
	LastBlockTotalTx 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
	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 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 and persists the result to the database.

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 and persists the result to the database.

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 go-amino.

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!

type ValidatorsInfo 

type ValidatorsInfo struct {
	ValidatorSet      *types.ValidatorSet
	LastHeightChanged int64
}

ValidatorsInfo represents the latest validator set, or the last height it changed

func (*ValidatorsInfo) Bytes 

func (valInfo *ValidatorsInfo) Bytes() []byte

Bytes serializes the ValidatorsInfo using go-amino.

type Version 

type Version struct {
	Consensus version.Consensus
	Software  string
}

Version is for versioning the State. It holds the Block and App version needed for making blocks, and the software version to support upgrades to the format of the State as stored on disk.

Source Files

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Directories

Path Synopsis
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