state

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Published: Dec 16, 2018 License: Apache-2.0 Imports: 23 Imported by: 0

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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
	BeginBlock *abci.ResponseBeginBlock
}

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

type ErrNoConsensusParamsForHeight

type ErrNoConsensusParamsForHeight struct {
	Height int64
}

func (ErrNoConsensusParamsForHeight) Error

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

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 + 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 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.

Directories

Path Synopsis
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