You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
727 lines
20 KiB
727 lines
20 KiB
package mempool
|
|
|
|
import (
|
|
"bytes"
|
|
"container/list"
|
|
"crypto/sha256"
|
|
"fmt"
|
|
"sync"
|
|
"sync/atomic"
|
|
"time"
|
|
|
|
"github.com/pkg/errors"
|
|
|
|
abci "github.com/tendermint/tendermint/abci/types"
|
|
cfg "github.com/tendermint/tendermint/config"
|
|
auto "github.com/tendermint/tendermint/libs/autofile"
|
|
"github.com/tendermint/tendermint/libs/clist"
|
|
cmn "github.com/tendermint/tendermint/libs/common"
|
|
"github.com/tendermint/tendermint/libs/log"
|
|
"github.com/tendermint/tendermint/p2p"
|
|
"github.com/tendermint/tendermint/proxy"
|
|
"github.com/tendermint/tendermint/types"
|
|
)
|
|
|
|
//--------------------------------------------------------------------------------
|
|
|
|
// 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.
|
|
type CListMempool struct {
|
|
// Atomic integers
|
|
height int64 // the last block Update()'d to
|
|
txsBytes int64 // total size of mempool, in bytes
|
|
rechecking int32 // for re-checking filtered txs on Update()
|
|
|
|
// notify listeners (ie. consensus) when txs are available
|
|
notifiedTxsAvailable bool
|
|
txsAvailable chan struct{} // fires once for each height, when the mempool is not empty
|
|
|
|
config *cfg.MempoolConfig
|
|
|
|
proxyMtx sync.Mutex
|
|
proxyAppConn proxy.AppConnMempool
|
|
txs *clist.CList // concurrent linked-list of good txs
|
|
preCheck PreCheckFunc
|
|
postCheck PostCheckFunc
|
|
|
|
// Track whether we're rechecking txs.
|
|
// These are not protected by a mutex and are expected to be mutated
|
|
// in serial (ie. by abci responses which are called in serial).
|
|
recheckCursor *clist.CElement // next expected response
|
|
recheckEnd *clist.CElement // re-checking stops here
|
|
|
|
// Map for quick access to txs to record sender in CheckTx.
|
|
// txsMap: txKey -> CElement
|
|
txsMap sync.Map
|
|
|
|
// Keep a cache of already-seen txs.
|
|
// This reduces the pressure on the proxyApp.
|
|
cache txCache
|
|
|
|
// A log of mempool txs
|
|
wal *auto.AutoFile
|
|
|
|
logger log.Logger
|
|
|
|
metrics *Metrics
|
|
}
|
|
|
|
var _ Mempool = &CListMempool{}
|
|
|
|
// CListMempoolOption sets an optional parameter on the mempool.
|
|
type CListMempoolOption func(*CListMempool)
|
|
|
|
// NewCListMempool returns a new mempool with the given configuration and connection to an application.
|
|
func NewCListMempool(
|
|
config *cfg.MempoolConfig,
|
|
proxyAppConn proxy.AppConnMempool,
|
|
height int64,
|
|
options ...CListMempoolOption,
|
|
) *CListMempool {
|
|
mempool := &CListMempool{
|
|
config: config,
|
|
proxyAppConn: proxyAppConn,
|
|
txs: clist.New(),
|
|
height: height,
|
|
rechecking: 0,
|
|
recheckCursor: nil,
|
|
recheckEnd: nil,
|
|
logger: log.NewNopLogger(),
|
|
metrics: NopMetrics(),
|
|
}
|
|
if config.CacheSize > 0 {
|
|
mempool.cache = newMapTxCache(config.CacheSize)
|
|
} else {
|
|
mempool.cache = nopTxCache{}
|
|
}
|
|
proxyAppConn.SetResponseCallback(mempool.globalCb)
|
|
for _, option := range options {
|
|
option(mempool)
|
|
}
|
|
return mempool
|
|
}
|
|
|
|
// NOTE: not thread safe - should only be called once, on startup
|
|
func (mem *CListMempool) EnableTxsAvailable() {
|
|
mem.txsAvailable = make(chan struct{}, 1)
|
|
}
|
|
|
|
// SetLogger sets the Logger.
|
|
func (mem *CListMempool) SetLogger(l log.Logger) {
|
|
mem.logger = l
|
|
}
|
|
|
|
// WithPreCheck sets a filter for the mempool to reject a tx if f(tx) returns
|
|
// false. This is ran before CheckTx.
|
|
func WithPreCheck(f PreCheckFunc) CListMempoolOption {
|
|
return func(mem *CListMempool) { mem.preCheck = f }
|
|
}
|
|
|
|
// WithPostCheck sets a filter for the mempool to reject a tx if f(tx) returns
|
|
// false. This is ran after CheckTx.
|
|
func WithPostCheck(f PostCheckFunc) CListMempoolOption {
|
|
return func(mem *CListMempool) { mem.postCheck = f }
|
|
}
|
|
|
|
// WithMetrics sets the metrics.
|
|
func WithMetrics(metrics *Metrics) CListMempoolOption {
|
|
return func(mem *CListMempool) { mem.metrics = metrics }
|
|
}
|
|
|
|
// *panics* if can't create directory or open file.
|
|
// *not thread safe*
|
|
func (mem *CListMempool) InitWAL() {
|
|
walDir := mem.config.WalDir()
|
|
err := cmn.EnsureDir(walDir, 0700)
|
|
if err != nil {
|
|
panic(errors.Wrap(err, "Error ensuring WAL dir"))
|
|
}
|
|
af, err := auto.OpenAutoFile(walDir + "/wal")
|
|
if err != nil {
|
|
panic(errors.Wrap(err, "Error opening WAL file"))
|
|
}
|
|
mem.wal = af
|
|
}
|
|
|
|
func (mem *CListMempool) CloseWAL() {
|
|
mem.proxyMtx.Lock()
|
|
defer mem.proxyMtx.Unlock()
|
|
|
|
if err := mem.wal.Close(); err != nil {
|
|
mem.logger.Error("Error closing WAL", "err", err)
|
|
}
|
|
mem.wal = nil
|
|
}
|
|
|
|
func (mem *CListMempool) Lock() {
|
|
mem.proxyMtx.Lock()
|
|
}
|
|
|
|
func (mem *CListMempool) Unlock() {
|
|
mem.proxyMtx.Unlock()
|
|
}
|
|
|
|
func (mem *CListMempool) Size() int {
|
|
return mem.txs.Len()
|
|
}
|
|
|
|
func (mem *CListMempool) TxsBytes() int64 {
|
|
return atomic.LoadInt64(&mem.txsBytes)
|
|
}
|
|
|
|
func (mem *CListMempool) FlushAppConn() error {
|
|
return mem.proxyAppConn.FlushSync()
|
|
}
|
|
|
|
func (mem *CListMempool) Flush() {
|
|
mem.proxyMtx.Lock()
|
|
defer mem.proxyMtx.Unlock()
|
|
|
|
mem.cache.Reset()
|
|
|
|
for e := mem.txs.Front(); e != nil; e = e.Next() {
|
|
mem.txs.Remove(e)
|
|
e.DetachPrev()
|
|
}
|
|
|
|
mem.txsMap = sync.Map{}
|
|
_ = atomic.SwapInt64(&mem.txsBytes, 0)
|
|
}
|
|
|
|
// TxsFront returns the first transaction in the ordered list for peer
|
|
// goroutines to call .NextWait() on.
|
|
// FIXME: leaking implementation details!
|
|
func (mem *CListMempool) TxsFront() *clist.CElement {
|
|
return mem.txs.Front()
|
|
}
|
|
|
|
// 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)
|
|
func (mem *CListMempool) TxsWaitChan() <-chan struct{} {
|
|
return mem.txs.WaitChan()
|
|
}
|
|
|
|
// 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.
|
|
func (mem *CListMempool) CheckTx(tx types.Tx, cb func(*abci.Response)) (err error) {
|
|
return mem.CheckTxWithInfo(tx, cb, TxInfo{SenderID: UnknownPeerID})
|
|
}
|
|
|
|
func (mem *CListMempool) CheckTxWithInfo(tx types.Tx, cb func(*abci.Response), txInfo TxInfo) (err error) {
|
|
mem.proxyMtx.Lock()
|
|
// use defer to unlock mutex because application (*local client*) might panic
|
|
defer mem.proxyMtx.Unlock()
|
|
|
|
var (
|
|
memSize = mem.Size()
|
|
txsBytes = mem.TxsBytes()
|
|
txSize = len(tx)
|
|
)
|
|
if memSize >= mem.config.Size ||
|
|
int64(txSize)+txsBytes > mem.config.MaxTxsBytes {
|
|
return ErrMempoolIsFull{
|
|
memSize, mem.config.Size,
|
|
txsBytes, mem.config.MaxTxsBytes}
|
|
}
|
|
|
|
// The size of the corresponding amino-encoded TxMessage
|
|
// can't be larger than the maxMsgSize, otherwise we can't
|
|
// relay it to peers.
|
|
if txSize > mem.config.MaxTxBytes {
|
|
return ErrTxTooLarge{mem.config.MaxTxBytes, txSize}
|
|
}
|
|
|
|
if mem.preCheck != nil {
|
|
if err := mem.preCheck(tx); err != nil {
|
|
return ErrPreCheck{err}
|
|
}
|
|
}
|
|
|
|
// CACHE
|
|
if !mem.cache.Push(tx) {
|
|
// Record a new sender for a tx we've already seen.
|
|
// Note it's possible a tx is still in the cache but no longer in the mempool
|
|
// (eg. after committing a block, txs are removed from mempool but not cache),
|
|
// so we only record the sender for txs still in the mempool.
|
|
if e, ok := mem.txsMap.Load(txKey(tx)); ok {
|
|
memTx := e.(*clist.CElement).Value.(*mempoolTx)
|
|
memTx.senders.LoadOrStore(txInfo.SenderID, true)
|
|
// TODO: consider punishing peer for dups,
|
|
// its non-trivial since invalid txs can become valid,
|
|
// but they can spam the same tx with little cost to them atm.
|
|
|
|
}
|
|
|
|
return ErrTxInCache
|
|
}
|
|
// END CACHE
|
|
|
|
// WAL
|
|
if mem.wal != nil {
|
|
// TODO: Notify administrators when WAL fails
|
|
_, err := mem.wal.Write([]byte(tx))
|
|
if err != nil {
|
|
mem.logger.Error("Error writing to WAL", "err", err)
|
|
}
|
|
_, err = mem.wal.Write([]byte("\n"))
|
|
if err != nil {
|
|
mem.logger.Error("Error writing to WAL", "err", err)
|
|
}
|
|
}
|
|
// END WAL
|
|
|
|
// NOTE: proxyAppConn may error if tx buffer is full
|
|
if err = mem.proxyAppConn.Error(); err != nil {
|
|
return err
|
|
}
|
|
|
|
reqRes := mem.proxyAppConn.CheckTxAsync(abci.RequestCheckTx{Tx: tx})
|
|
reqRes.SetCallback(mem.reqResCb(tx, txInfo.SenderID, txInfo.SenderP2PID, cb))
|
|
|
|
return nil
|
|
}
|
|
|
|
// Global callback that will be called after every ABCI response.
|
|
// Having a single global callback avoids needing to set a callback for each request.
|
|
// However, processing the checkTx response requires the peerID (so we can track which txs we heard from who),
|
|
// and peerID is not included in the ABCI request, so we have to set request-specific callbacks that
|
|
// include this information. If we're not in the midst of a recheck, this function will just return,
|
|
// so the request specific callback can do the work.
|
|
// When rechecking, we don't need the peerID, so the recheck callback happens here.
|
|
func (mem *CListMempool) globalCb(req *abci.Request, res *abci.Response) {
|
|
if mem.recheckCursor == nil {
|
|
return
|
|
}
|
|
|
|
mem.metrics.RecheckTimes.Add(1)
|
|
mem.resCbRecheck(req, res)
|
|
|
|
// update metrics
|
|
mem.metrics.Size.Set(float64(mem.Size()))
|
|
}
|
|
|
|
// Request specific callback that should be set on individual reqRes objects
|
|
// to incorporate local information when processing the response.
|
|
// This allows us to track the peer that sent us this tx, so we can avoid sending it back to them.
|
|
// NOTE: alternatively, we could include this information in the ABCI request itself.
|
|
//
|
|
// External callers of CheckTx, like the RPC, can also pass an externalCb through here that is called
|
|
// when all other response processing is complete.
|
|
//
|
|
// Used in CheckTxWithInfo to record PeerID who sent us the tx.
|
|
func (mem *CListMempool) reqResCb(
|
|
tx []byte,
|
|
peerID uint16,
|
|
peerP2PID p2p.ID,
|
|
externalCb func(*abci.Response),
|
|
) func(res *abci.Response) {
|
|
return func(res *abci.Response) {
|
|
if mem.recheckCursor != nil {
|
|
// this should never happen
|
|
panic("recheck cursor is not nil in reqResCb")
|
|
}
|
|
|
|
mem.resCbFirstTime(tx, peerID, peerP2PID, res)
|
|
|
|
// update metrics
|
|
mem.metrics.Size.Set(float64(mem.Size()))
|
|
|
|
// passed in by the caller of CheckTx, eg. the RPC
|
|
if externalCb != nil {
|
|
externalCb(res)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Called from:
|
|
// - resCbFirstTime (lock not held) if tx is valid
|
|
func (mem *CListMempool) addTx(memTx *mempoolTx) {
|
|
e := mem.txs.PushBack(memTx)
|
|
mem.txsMap.Store(txKey(memTx.tx), e)
|
|
atomic.AddInt64(&mem.txsBytes, int64(len(memTx.tx)))
|
|
mem.metrics.TxSizeBytes.Observe(float64(len(memTx.tx)))
|
|
}
|
|
|
|
// Called from:
|
|
// - Update (lock held) if tx was committed
|
|
// - resCbRecheck (lock not held) if tx was invalidated
|
|
func (mem *CListMempool) removeTx(tx types.Tx, elem *clist.CElement, removeFromCache bool) {
|
|
mem.txs.Remove(elem)
|
|
elem.DetachPrev()
|
|
mem.txsMap.Delete(txKey(tx))
|
|
atomic.AddInt64(&mem.txsBytes, int64(-len(tx)))
|
|
|
|
if removeFromCache {
|
|
mem.cache.Remove(tx)
|
|
}
|
|
}
|
|
|
|
// callback, which is called after the app checked the tx for the first time.
|
|
//
|
|
// The case where the app checks the tx for the second and subsequent times is
|
|
// handled by the resCbRecheck callback.
|
|
func (mem *CListMempool) resCbFirstTime(
|
|
tx []byte,
|
|
peerID uint16,
|
|
peerP2PID p2p.ID,
|
|
res *abci.Response,
|
|
) {
|
|
switch r := res.Value.(type) {
|
|
case *abci.Response_CheckTx:
|
|
var postCheckErr error
|
|
if mem.postCheck != nil {
|
|
postCheckErr = mem.postCheck(tx, r.CheckTx)
|
|
}
|
|
if (r.CheckTx.Code == abci.CodeTypeOK) && postCheckErr == nil {
|
|
memTx := &mempoolTx{
|
|
height: mem.height,
|
|
gasWanted: r.CheckTx.GasWanted,
|
|
tx: tx,
|
|
}
|
|
memTx.senders.Store(peerID, true)
|
|
mem.addTx(memTx)
|
|
mem.logger.Info("Added good transaction",
|
|
"tx", txID(tx),
|
|
"res", r,
|
|
"height", memTx.height,
|
|
"total", mem.Size(),
|
|
)
|
|
mem.notifyTxsAvailable()
|
|
} else {
|
|
// ignore bad transaction
|
|
mem.logger.Info("Rejected bad transaction",
|
|
"tx", txID(tx), "peerID", peerP2PID, "res", r, "err", postCheckErr)
|
|
mem.metrics.FailedTxs.Add(1)
|
|
// remove from cache (it might be good later)
|
|
mem.cache.Remove(tx)
|
|
}
|
|
default:
|
|
// ignore other messages
|
|
}
|
|
}
|
|
|
|
// callback, which is called after the app rechecked the tx.
|
|
//
|
|
// The case where the app checks the tx for the first time is handled by the
|
|
// resCbFirstTime callback.
|
|
func (mem *CListMempool) resCbRecheck(req *abci.Request, res *abci.Response) {
|
|
switch r := res.Value.(type) {
|
|
case *abci.Response_CheckTx:
|
|
tx := req.GetCheckTx().Tx
|
|
memTx := mem.recheckCursor.Value.(*mempoolTx)
|
|
if !bytes.Equal(tx, memTx.tx) {
|
|
panic(fmt.Sprintf(
|
|
"Unexpected tx response from proxy during recheck\nExpected %X, got %X",
|
|
memTx.tx,
|
|
tx))
|
|
}
|
|
var postCheckErr error
|
|
if mem.postCheck != nil {
|
|
postCheckErr = mem.postCheck(tx, r.CheckTx)
|
|
}
|
|
if (r.CheckTx.Code == abci.CodeTypeOK) && postCheckErr == nil {
|
|
// Good, nothing to do.
|
|
} else {
|
|
// Tx became invalidated due to newly committed block.
|
|
mem.logger.Info("Tx is no longer valid", "tx", txID(tx), "res", r, "err", postCheckErr)
|
|
// NOTE: we remove tx from the cache because it might be good later
|
|
mem.removeTx(tx, mem.recheckCursor, true)
|
|
}
|
|
if mem.recheckCursor == mem.recheckEnd {
|
|
mem.recheckCursor = nil
|
|
} else {
|
|
mem.recheckCursor = mem.recheckCursor.Next()
|
|
}
|
|
if mem.recheckCursor == nil {
|
|
// Done!
|
|
atomic.StoreInt32(&mem.rechecking, 0)
|
|
mem.logger.Info("Done rechecking txs")
|
|
|
|
// incase the recheck removed all txs
|
|
if mem.Size() > 0 {
|
|
mem.notifyTxsAvailable()
|
|
}
|
|
}
|
|
default:
|
|
// ignore other messages
|
|
}
|
|
}
|
|
|
|
func (mem *CListMempool) TxsAvailable() <-chan struct{} {
|
|
return mem.txsAvailable
|
|
}
|
|
|
|
func (mem *CListMempool) notifyTxsAvailable() {
|
|
if mem.Size() == 0 {
|
|
panic("notified txs available but mempool is empty!")
|
|
}
|
|
if mem.txsAvailable != nil && !mem.notifiedTxsAvailable {
|
|
// channel cap is 1, so this will send once
|
|
mem.notifiedTxsAvailable = true
|
|
select {
|
|
case mem.txsAvailable <- struct{}{}:
|
|
default:
|
|
}
|
|
}
|
|
}
|
|
|
|
func (mem *CListMempool) ReapMaxBytesMaxGas(maxBytes, maxGas int64) types.Txs {
|
|
mem.proxyMtx.Lock()
|
|
defer mem.proxyMtx.Unlock()
|
|
|
|
for atomic.LoadInt32(&mem.rechecking) > 0 {
|
|
// TODO: Something better?
|
|
time.Sleep(time.Millisecond * 10)
|
|
}
|
|
|
|
var totalBytes int64
|
|
var totalGas int64
|
|
// TODO: we will get a performance boost if we have a good estimate of avg
|
|
// size per tx, and set the initial capacity based off of that.
|
|
// txs := make([]types.Tx, 0, cmn.MinInt(mem.txs.Len(), max/mem.avgTxSize))
|
|
txs := make([]types.Tx, 0, mem.txs.Len())
|
|
for e := mem.txs.Front(); e != nil; e = e.Next() {
|
|
memTx := e.Value.(*mempoolTx)
|
|
// Check total size requirement
|
|
aminoOverhead := types.ComputeAminoOverhead(memTx.tx, 1)
|
|
if maxBytes > -1 && totalBytes+int64(len(memTx.tx))+aminoOverhead > maxBytes {
|
|
return txs
|
|
}
|
|
totalBytes += int64(len(memTx.tx)) + aminoOverhead
|
|
// Check total gas requirement.
|
|
// If maxGas is negative, skip this check.
|
|
// Since newTotalGas < masGas, which
|
|
// must be non-negative, it follows that this won't overflow.
|
|
newTotalGas := totalGas + memTx.gasWanted
|
|
if maxGas > -1 && newTotalGas > maxGas {
|
|
return txs
|
|
}
|
|
totalGas = newTotalGas
|
|
txs = append(txs, memTx.tx)
|
|
}
|
|
return txs
|
|
}
|
|
|
|
func (mem *CListMempool) ReapMaxTxs(max int) types.Txs {
|
|
mem.proxyMtx.Lock()
|
|
defer mem.proxyMtx.Unlock()
|
|
|
|
if max < 0 {
|
|
max = mem.txs.Len()
|
|
}
|
|
|
|
for atomic.LoadInt32(&mem.rechecking) > 0 {
|
|
// TODO: Something better?
|
|
time.Sleep(time.Millisecond * 10)
|
|
}
|
|
|
|
txs := make([]types.Tx, 0, cmn.MinInt(mem.txs.Len(), max))
|
|
for e := mem.txs.Front(); e != nil && len(txs) <= max; e = e.Next() {
|
|
memTx := e.Value.(*mempoolTx)
|
|
txs = append(txs, memTx.tx)
|
|
}
|
|
return txs
|
|
}
|
|
|
|
func (mem *CListMempool) Update(
|
|
height int64,
|
|
txs types.Txs,
|
|
deliverTxResponses []*abci.ResponseDeliverTx,
|
|
preCheck PreCheckFunc,
|
|
postCheck PostCheckFunc,
|
|
) error {
|
|
// Set height
|
|
mem.height = height
|
|
mem.notifiedTxsAvailable = false
|
|
|
|
if preCheck != nil {
|
|
mem.preCheck = preCheck
|
|
}
|
|
if postCheck != nil {
|
|
mem.postCheck = postCheck
|
|
}
|
|
|
|
for i, tx := range txs {
|
|
if deliverTxResponses[i].Code == abci.CodeTypeOK {
|
|
// Add valid committed tx to the cache (if missing).
|
|
_ = mem.cache.Push(tx)
|
|
} else {
|
|
// Allow invalid transactions to be resubmitted.
|
|
mem.cache.Remove(tx)
|
|
}
|
|
|
|
// Remove committed tx from the mempool.
|
|
//
|
|
// Note an evil proposer can drop valid txs!
|
|
// Mempool before:
|
|
// 100 -> 101 -> 102
|
|
// Block, proposed by an evil proposer:
|
|
// 101 -> 102
|
|
// Mempool after:
|
|
// 100
|
|
// https://github.com/tendermint/tendermint/issues/3322.
|
|
if e, ok := mem.txsMap.Load(txKey(tx)); ok {
|
|
mem.removeTx(tx, e.(*clist.CElement), false)
|
|
}
|
|
}
|
|
|
|
// Either recheck non-committed txs to see if they became invalid
|
|
// or just notify there're some txs left.
|
|
if mem.Size() > 0 {
|
|
if mem.config.Recheck {
|
|
mem.logger.Info("Recheck txs", "numtxs", mem.Size(), "height", height)
|
|
mem.recheckTxs()
|
|
// At this point, mem.txs are being rechecked.
|
|
// mem.recheckCursor re-scans mem.txs and possibly removes some txs.
|
|
// Before mem.Reap(), we should wait for mem.recheckCursor to be nil.
|
|
} else {
|
|
mem.notifyTxsAvailable()
|
|
}
|
|
}
|
|
|
|
// Update metrics
|
|
mem.metrics.Size.Set(float64(mem.Size()))
|
|
|
|
return nil
|
|
}
|
|
|
|
func (mem *CListMempool) recheckTxs() {
|
|
if mem.Size() == 0 {
|
|
panic("recheckTxs is called, but the mempool is empty")
|
|
}
|
|
|
|
atomic.StoreInt32(&mem.rechecking, 1)
|
|
mem.recheckCursor = mem.txs.Front()
|
|
mem.recheckEnd = mem.txs.Back()
|
|
|
|
// Push txs to proxyAppConn
|
|
// NOTE: globalCb may be called concurrently.
|
|
for e := mem.txs.Front(); e != nil; e = e.Next() {
|
|
memTx := e.Value.(*mempoolTx)
|
|
mem.proxyAppConn.CheckTxAsync(abci.RequestCheckTx{
|
|
Tx: memTx.tx,
|
|
Type: abci.CheckTxType_Recheck,
|
|
})
|
|
}
|
|
|
|
mem.proxyAppConn.FlushAsync()
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------
|
|
|
|
// mempoolTx is a transaction that successfully ran
|
|
type mempoolTx struct {
|
|
height int64 // height that this tx had been validated in
|
|
gasWanted int64 // amount of gas this tx states it will require
|
|
tx types.Tx //
|
|
|
|
// ids of peers who've sent us this tx (as a map for quick lookups).
|
|
// senders: PeerID -> bool
|
|
senders sync.Map
|
|
}
|
|
|
|
// Height returns the height for this transaction
|
|
func (memTx *mempoolTx) Height() int64 {
|
|
return atomic.LoadInt64(&memTx.height)
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------
|
|
|
|
type txCache interface {
|
|
Reset()
|
|
Push(tx types.Tx) bool
|
|
Remove(tx types.Tx)
|
|
}
|
|
|
|
// mapTxCache maintains a LRU cache of transactions. This only stores the hash
|
|
// of the tx, due to memory concerns.
|
|
type mapTxCache struct {
|
|
mtx sync.Mutex
|
|
size int
|
|
map_ map[[sha256.Size]byte]*list.Element
|
|
list *list.List
|
|
}
|
|
|
|
var _ txCache = (*mapTxCache)(nil)
|
|
|
|
// newMapTxCache returns a new mapTxCache.
|
|
func newMapTxCache(cacheSize int) *mapTxCache {
|
|
return &mapTxCache{
|
|
size: cacheSize,
|
|
map_: make(map[[sha256.Size]byte]*list.Element, cacheSize),
|
|
list: list.New(),
|
|
}
|
|
}
|
|
|
|
// Reset resets the cache to an empty state.
|
|
func (cache *mapTxCache) Reset() {
|
|
cache.mtx.Lock()
|
|
cache.map_ = make(map[[sha256.Size]byte]*list.Element, cache.size)
|
|
cache.list.Init()
|
|
cache.mtx.Unlock()
|
|
}
|
|
|
|
// Push adds the given tx to the cache and returns true. It returns
|
|
// false if tx is already in the cache.
|
|
func (cache *mapTxCache) Push(tx types.Tx) bool {
|
|
cache.mtx.Lock()
|
|
defer cache.mtx.Unlock()
|
|
|
|
// Use the tx hash in the cache
|
|
txHash := txKey(tx)
|
|
if moved, exists := cache.map_[txHash]; exists {
|
|
cache.list.MoveToBack(moved)
|
|
return false
|
|
}
|
|
|
|
if cache.list.Len() >= cache.size {
|
|
popped := cache.list.Front()
|
|
poppedTxHash := popped.Value.([sha256.Size]byte)
|
|
delete(cache.map_, poppedTxHash)
|
|
if popped != nil {
|
|
cache.list.Remove(popped)
|
|
}
|
|
}
|
|
e := cache.list.PushBack(txHash)
|
|
cache.map_[txHash] = e
|
|
return true
|
|
}
|
|
|
|
// Remove removes the given tx from the cache.
|
|
func (cache *mapTxCache) Remove(tx types.Tx) {
|
|
cache.mtx.Lock()
|
|
txHash := txKey(tx)
|
|
popped := cache.map_[txHash]
|
|
delete(cache.map_, txHash)
|
|
if popped != nil {
|
|
cache.list.Remove(popped)
|
|
}
|
|
|
|
cache.mtx.Unlock()
|
|
}
|
|
|
|
type nopTxCache struct{}
|
|
|
|
var _ txCache = (*nopTxCache)(nil)
|
|
|
|
func (nopTxCache) Reset() {}
|
|
func (nopTxCache) Push(types.Tx) bool { return true }
|
|
func (nopTxCache) Remove(types.Tx) {}
|
|
|
|
//--------------------------------------------------------------------------------
|
|
|
|
// txKey is the fixed length array sha256 hash used as the key in maps.
|
|
func txKey(tx types.Tx) [sha256.Size]byte {
|
|
return sha256.Sum256(tx)
|
|
}
|
|
|
|
// txID is the hex encoded hash of the bytes as a types.Tx.
|
|
func txID(tx []byte) string {
|
|
return fmt.Sprintf("%X", types.Tx(tx).Hash())
|
|
}
|