mempool

package
v1.0.3 Latest Latest
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 Go to latest Published: Jan 4, 2022 License: Apache-2.0, Apache-2.0 Imports: 30 Imported by: 1

Documentation

Overview

TODO: Better handle abci client errors. (make it automatically handle connection errors)

Index

Constants

View Source 
const (
	MempoolChannel = byte(0x30)

	// UnknownPeerID is the peer ID to use when running CheckTx when there is
	// no peer (e.g. RPC)
	UnknownPeerID uint16 = 0
)
View Source 
const (
	FlagEnablePendingPool = "mempool.enable_pending_pool"
)
View Source 
const (
	// MetricsSubsystem is a subsystem shared by all metrics exposed by this
	// package.
	MetricsSubsystem = "mempool"
)

Variables

View Source 
var (
	// ErrTxInCache is returned to the client if we saw tx earlier
	ErrTxInCache = errors.New("tx already exists in cache")
	// ErrNoSuchTx is returned to the client if there hasn't target tx in mempool
	ErrNoSuchTx = errors.New("no such tx in mempool")
)

Functions

func IsPreCheckError 

func IsPreCheckError(err error) bool

IsPreCheckError returns true if err is due to pre check failure.

func MultiPriceBump 

func MultiPriceBump(rawPrice *big.Int, priceBump int64) *big.Int

func RegisterMessages 

func RegisterMessages(cdc *amino.Codec)

Types

type AccountRetriever 

type AccountRetriever interface {
	GetAccountNonce(address string) uint64
}

type AddressRecord 

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

func (*AddressRecord) AddItem 

func (ar *AddressRecord) AddItem(address string, txHash string, cElement *clist.CElement)

func (*AddressRecord) DeleteItem 

func (ar *AddressRecord) DeleteItem(e *clist.CElement)

func (*AddressRecord) GetAddressList 

func (ar *AddressRecord) GetAddressList() []string

func (*AddressRecord) GetAddressTxs 

func (ar *AddressRecord) GetAddressTxs(address string, txCount int, max int) types.Txs

func (*AddressRecord) GetAddressTxsCnt 

func (ar *AddressRecord) GetAddressTxsCnt(address string) int

func (*AddressRecord) GetItem 

func (ar *AddressRecord) GetItem(address string) (map[string]*clist.CElement, bool)

type CListMempool 

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

CListMempool is an ordered in-memory pool for transactions before they are proposed in a consensus round. Transaction validity is checked using the CheckTx abci message before the transaction is added to the pool. The mempool uses a concurrent list structure for storing transactions that can be efficiently accessed by multiple concurrent readers.

func NewCListMempool 

func NewCListMempool(
	config *cfg.MempoolConfig,
	proxyAppConn proxy.AppConnMempool,
	height int64,
	options ...CListMempoolOption,
) *CListMempool

NewCListMempool returns a new mempool with the given configuration and connection to an application.

func (*CListMempool) BroadcastTxsFront 

func (mem *CListMempool) BroadcastTxsFront() *clist.CElement

func (*CListMempool) CheckTx 

func (mem *CListMempool) CheckTx(tx types.Tx, cb func(*abci.Response), txInfo TxInfo) error

It blocks if we're waiting on Update() or Reap(). cb: A callback from the CheckTx command. 

It gets called from another goroutine.

CONTRACT: Either cb will get called, or err returned.

Safe for concurrent use by multiple goroutines.

func (*CListMempool) CloseWAL 

func (mem *CListMempool) CloseWAL()

func (*CListMempool) EnableTxsAvailable 

func (mem *CListMempool) EnableTxsAvailable()

NOTE: not thread safe - should only be called once, on startup

func (*CListMempool) Flush 

func (mem *CListMempool) Flush()

XXX: Unsafe! Calling Flush may leave mempool in inconsistent state.

func (*CListMempool) FlushAppConn 

func (mem *CListMempool) FlushAppConn() error

Lock() must be help by the caller during execution.

func (*CListMempool) GetAddressList 

func (mem *CListMempool) GetAddressList() []string

func (*CListMempool) GetConfig 

func (mem *CListMempool) GetConfig() *cfg.MempoolConfig

func (*CListMempool) GetTxByHash 

func (mem *CListMempool) GetTxByHash(hash [sha256.Size]byte) (types.Tx, error)

func (*CListMempool) GetUserPendingTxsCnt 

func (mem *CListMempool) GetUserPendingTxsCnt(address string) int

func (*CListMempool) InitWAL 

func (mem *CListMempool) InitWAL() error

func (*CListMempool) Lock 

func (mem *CListMempool) Lock()

Safe for concurrent use by multiple goroutines.

func (*CListMempool) ReapMaxBytesMaxGas 

func (mem *CListMempool) ReapMaxBytesMaxGas(maxBytes, maxGas int64) types.Txs

Safe for concurrent use by multiple goroutines.

func (*CListMempool) ReapMaxTxs 

func (mem *CListMempool) ReapMaxTxs(max int) types.Txs

Safe for concurrent use by multiple goroutines.

func (*CListMempool) ReapUserTxs 

func (mem *CListMempool) ReapUserTxs(address string, max int) types.Txs

func (*CListMempool) ReapUserTxsCnt 

func (mem *CListMempool) ReapUserTxsCnt(address string) int

func (*CListMempool) SetAccountRetriever 

func (mem *CListMempool) SetAccountRetriever(retriever AccountRetriever)

func (*CListMempool) SetEventBus 

func (mem *CListMempool) SetEventBus(eventBus types.TxEventPublisher)

SetLogger sets the Logger.

func (*CListMempool) SetLogger 

func (mem *CListMempool) SetLogger(l log.Logger)

SetLogger sets the Logger.

func (*CListMempool) SetTxInfoParser 

func (mem *CListMempool) SetTxInfoParser(parser TxInfoParser)

func (*CListMempool) Size 

func (mem *CListMempool) Size() int

Safe for concurrent use by multiple goroutines.

func (*CListMempool) TxsAvailable 

func (mem *CListMempool) TxsAvailable() <-chan struct{}

Safe for concurrent use by multiple goroutines.

func (*CListMempool) TxsBytes 

func (mem *CListMempool) TxsBytes() int64

Safe for concurrent use by multiple goroutines.

func (*CListMempool) TxsFront 

func (mem *CListMempool) TxsFront() *clist.CElement

TxsFront returns the first transaction in the ordered list for peer goroutines to call .NextWait() on. FIXME: leaking implementation details!

Safe for concurrent use by multiple goroutines.

func (*CListMempool) TxsWaitChan 

func (mem *CListMempool) TxsWaitChan() <-chan struct{}

TxsWaitChan returns a channel to wait on transactions. It will be closed once the mempool is not empty (ie. the internal `mem.txs` has at least one element)

Safe for concurrent use by multiple goroutines.

func (*CListMempool) Unlock 

func (mem *CListMempool) Unlock()

Safe for concurrent use by multiple goroutines.

func (*CListMempool) Update 

func (mem *CListMempool) Update(
	height int64,
	txs types.Txs,
	deliverTxResponses []*abci.ResponseDeliverTx,
	preCheck PreCheckFunc,
	postCheck PostCheckFunc,
) error

Lock() must be help by the caller during execution.

type CListMempoolOption 

type CListMempoolOption func(*CListMempool)

CListMempoolOption sets an optional parameter on the mempool.

func WithMetrics 

func WithMetrics(metrics *Metrics) CListMempoolOption

WithMetrics sets the metrics.

func WithPostCheck 

func WithPostCheck(f PostCheckFunc) CListMempoolOption

WithPostCheck sets a filter for the mempool to reject a tx if f(tx) returns false. This is ran after CheckTx.

func WithPreCheck 

func WithPreCheck(f PreCheckFunc) CListMempoolOption

WithPreCheck sets a filter for the mempool to reject a tx if f(tx) returns false. This is ran before CheckTx.

type ErrMempoolIsFull 

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

ErrMempoolIsFull means Tendermint & an application can't handle that much load

func (ErrMempoolIsFull) Error 

func (e ErrMempoolIsFull) Error() string

type ErrPendingPoolAddressLimit 

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

ErrPendingPoolAddressLimit means address sending too many txs in PendingPool

func (ErrPendingPoolAddressLimit) Error 

func (e ErrPendingPoolAddressLimit) Error() string

type ErrPendingPoolIsFull 

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

ErrPendingPoolIsFull means PendingPool can't handle that much load

func (ErrPendingPoolIsFull) Error 

func (e ErrPendingPoolIsFull) Error() string

type ErrPreCheck 

type ErrPreCheck struct {
	Reason error
}

ErrPreCheck is returned when tx is too big

func (ErrPreCheck) Error 

func (e ErrPreCheck) Error() string

type ErrTxAlreadyInPendingPool 

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

ErrTxAlreadyInPendingPool means the tx already in PendingPool

func (ErrTxAlreadyInPendingPool) Error 

func (e ErrTxAlreadyInPendingPool) Error() string

type ErrTxTooLarge 

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

ErrTxTooLarge means the tx is too big to be sent in a message to other peers

func (ErrTxTooLarge) Error 

func (e ErrTxTooLarge) Error() string

type ExTxInfo 

type ExTxInfo struct {
	Sender      string   `json:"sender"`
	SenderNonce uint64   `json:"sender_nonce"`
	GasPrice    *big.Int `json:"gas_price"`
	Nonce       uint64   `json:"nonce"`
}

--------------------------------------------------------------------------------

type GasInfo 

type GasInfo struct {
	// GasWanted is the maximum units of work we allow this tx to perform.
	GasWanted uint64

	// GasUsed is the amount of gas actually consumed.
	GasUsed uint64
}

GasInfo defines tx execution gas context.

type Mempool 

type Mempool interface {
	// CheckTx executes a new transaction against the application to determine
	// its validity and whether it should be added to the mempool.
	CheckTx(tx types.Tx, callback func(*abci.Response), txInfo TxInfo) error

	// ReapMaxBytesMaxGas reaps transactions from the mempool up to maxBytes
	// bytes total with the condition that the total gasWanted must be less than
	// maxGas.
	// If both maxes are negative, there is no cap on the size of all returned
	// transactions (~ all available transactions).
	ReapMaxBytesMaxGas(maxBytes, maxGas int64) types.Txs

	// ReapMaxTxs reaps up to max transactions from the mempool.
	// If max is negative, there is no cap on the size of all returned
	// transactions (~ all available transactions).
	ReapMaxTxs(max int) types.Txs

	ReapUserTxsCnt(address string) int

	// only for checkTx used!
	GetUserPendingTxsCnt(address string) int

	ReapUserTxs(address string, max int) types.Txs

	// Lock locks the mempool. The consensus must be able to hold lock to safely update.
	Lock()

	// Unlock unlocks the mempool.
	Unlock()

	// Update informs the mempool that the given txs were committed and can be discarded.
	// NOTE: this should be called *after* block is committed by consensus.
	// NOTE: Lock/Unlock must be managed by caller
	Update(
		blockHeight int64,
		blockTxs types.Txs,
		deliverTxResponses []*abci.ResponseDeliverTx,
		newPreFn PreCheckFunc,
		newPostFn PostCheckFunc,
	) error

	// FlushAppConn flushes the mempool connection to ensure async reqResCb calls are
	// done. E.g. from CheckTx.
	// NOTE: Lock/Unlock must be managed by caller
	FlushAppConn() error

	// Flush removes all transactions from the mempool and cache
	Flush()

	// TxsAvailable returns a channel which fires once for every height,
	// and only when transactions are available in the mempool.
	// NOTE: the returned channel may be nil if EnableTxsAvailable was not called.
	TxsAvailable() <-chan struct{}

	// EnableTxsAvailable initializes the TxsAvailable channel, ensuring it will
	// trigger once every height when transactions are available.
	EnableTxsAvailable()

	// Size returns the number of transactions in the mempool.
	Size() int

	// TxsBytes returns the total size of all txs in the mempool.
	TxsBytes() int64

	// InitWAL creates a directory for the WAL file and opens a file itself. If
	// there is an error, it will be of type *PathError.
	InitWAL() error

	// CloseWAL closes and discards the underlying WAL file.
	// Any further writes will not be relayed to disk.
	CloseWAL()

	SetEventBus(eventBus types.TxEventPublisher)

	GetConfig() *cfg.MempoolConfig
	GetTxByHash(hash [sha256.Size]byte) (types.Tx, error)

	GetAddressList() []string
	SetAccountRetriever(retriever AccountRetriever)

	SetTxInfoParser(parser TxInfoParser)
}

Mempool defines the mempool interface.

Updates to the mempool need to be synchronized with committing a block so apps can reset their transient state on Commit.

type Message 

type Message interface{}

Message is a message sent or received by the Reactor.

type Metrics 

type Metrics struct {
	// Size of the mempool.
	Size metrics.Gauge
	// Histogram of transaction sizes, in bytes.
	TxSizeBytes metrics.Histogram
	// Number of failed transactions.
	FailedTxs metrics.Counter
	// Number of times transactions are rechecked in the mempool.
	RecheckTimes metrics.Counter
	// Size of the pending pool
	PendingPoolSize metrics.Gauge
	// Size of the pending pool
	GasUsed metrics.Gauge
}

Metrics contains metrics exposed by this package. see MetricsProvider for descriptions.

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 PeerState 

type PeerState interface {
	GetHeight() int64
}

PeerState describes the state of a peer.

type PendingPool 

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

func (*PendingPool) Size 

func (p *PendingPool) Size() int

type PendingTx 

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

type PostCheckFunc 

type PostCheckFunc func(types.Tx, *abci.ResponseCheckTx) error

PostCheckFunc is an optional filter executed after CheckTx and rejects transaction if false is returned. An example would be to ensure a transaction doesn't require more gas than available for the block.

func PostCheckMaxGas 

func PostCheckMaxGas(maxGas int64) PostCheckFunc

PostCheckMaxGas checks that the wanted gas is smaller or equal to the passed maxGas. Returns nil if maxGas is -1.

type PreCheckFunc 

type PreCheckFunc func(types.Tx) error

PreCheckFunc is an optional filter executed before CheckTx and rejects transaction if false is returned. An example would be to ensure that a transaction doesn't exceeded the block size.

func PreCheckAminoMaxBytes 

func PreCheckAminoMaxBytes(maxBytes int64) PreCheckFunc

PreCheckAminoMaxBytes checks that the size of the transaction plus the amino overhead is smaller or equal to the expected maxBytes.

type Reactor 

type Reactor struct {
	p2p.BaseReactor
	// contains filtered or unexported fields
}

Reactor handles mempool tx broadcasting amongst peers. It maintains a map from peer ID to counter, to prevent gossiping txs to the peers you received it from.

func NewReactor 

func NewReactor(config *cfg.MempoolConfig, mempool *CListMempool) *Reactor

NewReactor returns a new Reactor with the given config and mempool.

func (*Reactor) AddPeer 

func (memR *Reactor) AddPeer(peer p2p.Peer)

AddPeer implements Reactor. It starts a broadcast routine ensuring all txs are forwarded to the given peer.

func (*Reactor) GetChannels 

func (memR *Reactor) GetChannels() []*p2p.ChannelDescriptor

GetChannels implements Reactor. It returns the list of channels for this reactor.

func (*Reactor) InitPeer 

func (memR *Reactor) InitPeer(peer p2p.Peer) p2p.Peer

InitPeer implements Reactor by creating a state for the peer.

func (*Reactor) OnStart 

func (memR *Reactor) OnStart() error

OnStart implements p2p.BaseReactor.

func (*Reactor) Receive 

func (memR *Reactor) Receive(chID byte, src p2p.Peer, msgBytes []byte)

Receive implements Reactor. It adds any received transactions to the mempool.

func (*Reactor) RemovePeer 

func (memR *Reactor) RemovePeer(peer p2p.Peer, reason interface{})

RemovePeer implements Reactor.

func (*Reactor) SetLogger 

func (memR *Reactor) SetLogger(l log.Logger)

SetLogger sets the Logger on the reactor and the underlying mempool.

type Result 

type Result struct {
	// Data is any data returned from message or handler execution. It MUST be length
	// prefixed in order to separate data from multiple message executions.
	Data []byte

	// Log contains the log information from message or handler execution.
	Log string

	// Events contains a slice of Event objects that were emitted during message or
	// handler execution.
	Events []abci.Event
}

Result is the union of ResponseFormat and ResponseCheckTx.

type SimulationResponse 

type SimulationResponse struct {
	GasInfo
	Result *Result
}

SimulationResponse defines the response generated when a transaction is successfully simulated by the Baseapp.

type TxInfo 

type TxInfo struct {
	// SenderID is the internal peer ID used in the mempool to identify the
	// sender, storing 2 bytes with each tx instead of 20 bytes for the p2p.ID.
	SenderID uint16
	// SenderP2PID is the actual p2p.ID of the sender, used e.g. for logging.
	SenderP2PID p2p.ID
}

TxInfo are parameters that get passed when attempting to add a tx to the mempool.

type TxInfoParser 

type TxInfoParser interface {
	GetRawTxInfo(tx types.Tx) ExTxInfo
	GetTxHistoryGasUsed(tx types.Tx) int64
}

type TxMessage 

type TxMessage struct {
	Tx types.Tx
}

TxMessage is a Message containing a transaction.

func (*TxMessage) String 

func (m *TxMessage) String() string

String returns a string representation of the TxMessage.

Source Files

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