Documentation
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Index ¶
Constants ¶
const ( MempoolChannel = byte(0x30) // PeerCatchupSleepIntervalMS defines how much time to sleep if a peer is behind PeerCatchupSleepIntervalMS = 100 // UnknownPeerID is the peer ID to use when running CheckTx when there is // no peer (e.g. RPC) UnknownPeerID uint16 = 0 MaxActiveIDs = math.MaxUint16 )
const ( // MetricsSubsystem is a subsystem shared by all metrics exposed by this // package. MetricsSubsystem = "mempool" )
Variables ¶
var ErrTxInCache = errors.New("tx already exists in cache")
ErrTxInCache is returned to the client if we saw tx earlier
Functions ¶
func IsPreCheckError ¶
IsPreCheckError returns true if err is due to pre check failure.
Types ¶
type ErrMempoolIsFull ¶
ErrMempoolIsFull defines an error where Tendermint and the application cannot handle that much load.
func (ErrMempoolIsFull) Error ¶
func (e ErrMempoolIsFull) Error() string
type ErrPreCheck ¶
type ErrPreCheck struct {
Reason error
}
ErrPreCheck defines an error where a transaction fails a pre-check.
func (ErrPreCheck) Error ¶
func (e ErrPreCheck) Error() string
type ErrTxTooLarge ¶
ErrTxTooLarge defines an error when a transaction is too big to be sent in a message to other peers.
func (ErrTxTooLarge) Error ¶
func (e ErrTxTooLarge) Error() string
type LRUTxCache ¶
type LRUTxCache struct {
// contains filtered or unexported fields
}
LRUTxCache maintains a thread-safe LRU cache of raw transactions. The cache only stores the hash of the raw transaction.
func NewLRUTxCache ¶
func NewLRUTxCache(cacheSize int) *LRUTxCache
func (*LRUTxCache) GetList ¶
func (c *LRUTxCache) GetList() *list.List
GetList returns the underlying linked-list that backs the LRU cache. Note, this should be used for testing purposes only!
func (*LRUTxCache) Remove ¶
func (c *LRUTxCache) Remove(tx types.Tx)
func (*LRUTxCache) Reset ¶
func (c *LRUTxCache) Reset()
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
// RemoveTxByKey removes a transaction, identified by its key,
// from the mempool.
RemoveTxByKey(txKey types.TxKey) 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
// 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:
// 1. This should be called *after* block is committed by consensus.
// 2. Lock/Unlock must be managed by the caller.
Update(
blockHeight int64,
blockTxs types.Txs,
deliverTxResponses []*abci.ResponseDeliverTx,
) error
// SetPreCheckFn sets the pre-check function.
SetPreCheckFn(fn PreCheckFunc)
// SetPostCheckFn sets the post-check function.
SetPostCheckFn(fn PostCheckFunc)
// FlushAppConn flushes the mempool connection to ensure async callback calls
// are done, e.g. from CheckTx.
//
// NOTE:
// 1. Lock/Unlock must be managed by caller.
FlushAppConn() error
// Flush removes all transactions from the mempool and caches.
Flush()
// TxsAvailable returns a channel which fires once for every height, and only
// when transactions are available in the mempool.
//
// NOTE:
// 1. 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
// SizeBytes returns the total size of all txs in the mempool.
SizeBytes() int64
}
Mempool defines the mempool interface.
Updates to the mempool need to be synchronized with committing a block so applications can reset their transient state on Commit.
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
// RejectedTxs defines the number of rejected transactions. These are
// transactions that passed CheckTx but failed to make it into the mempool
// due to resource limits, e.g. mempool is full and no lower priority
// transactions exist in the mempool.
RejectedTxs metrics.Counter
// EvictedTxs defines the number of evicted transactions. These are valid
// transactions that passed CheckTx and existed in the mempool but were later
// evicted to make room for higher priority valid transactions that passed
// CheckTx.
EvictedTxs metrics.Counter
// Number of times transactions are rechecked in the mempool.
RecheckTimes metrics.Counter
}
Metrics contains metrics exposed by this package. see MetricsProvider for descriptions.
func PrometheusMetrics ¶
PrometheusMetrics returns Metrics build using Prometheus client library. Optionally, labels can be provided along with their values ("foo", "fooValue").
type NopTxCache ¶
type NopTxCache struct{}
NopTxCache defines a no-op raw transaction cache.
func (NopTxCache) Remove ¶
func (NopTxCache) Remove(types.Tx)
func (NopTxCache) Reset ¶
func (NopTxCache) Reset()
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 ¶
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 PreCheckMaxBytes ¶
func PreCheckMaxBytes(maxBytes int64) PreCheckFunc
PreCheckMaxBytes checks that the size of the transaction is smaller or equal to the expected maxBytes.
type TxCache ¶
type TxCache interface {
// Reset resets the cache to an empty state.
Reset()
// Push adds the given raw transaction to the cache and returns true if it was
// newly added. Otherwise, it returns false.
Push(tx types.Tx) bool
// Remove removes the given raw transaction from the cache.
Remove(tx types.Tx)
// Has reports whether tx is present in the cache. Checking for presence is
// not treated as an access of the value.
Has(tx types.Tx) bool
}
TxCache defines an interface for raw transaction caching in a mempool. Currently, a TxCache does not allow direct reading or getting of transaction values. A TxCache is used primarily to push transactions and removing transactions. Pushing via Push returns a boolean telling the caller if the transaction already exists in the cache or not.
type TxInfo ¶
type TxInfo struct {
// SenderID is the internal peer ID used in the mempool to identify the
// sender, storing two bytes with each transaction instead of 20 bytes for
// the types.NodeID.
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.
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