mirror of https://github.com/poanetwork/quorum.git
419 lines
12 KiB
Go
419 lines
12 KiB
Go
package core
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"math/big"
|
|
"sort"
|
|
"sync"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/state"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/event"
|
|
"github.com/ethereum/go-ethereum/logger"
|
|
"github.com/ethereum/go-ethereum/logger/glog"
|
|
)
|
|
|
|
var (
|
|
// Transaction Pool Errors
|
|
ErrInvalidSender = errors.New("Invalid sender")
|
|
ErrNonce = errors.New("Nonce too low")
|
|
ErrCheap = errors.New("Gas price too low for acceptance")
|
|
ErrBalance = errors.New("Insufficient balance")
|
|
ErrNonExistentAccount = errors.New("Account does not exist or account balance too low")
|
|
ErrInsufficientFunds = errors.New("Insufficient funds for gas * price + value")
|
|
ErrIntrinsicGas = errors.New("Intrinsic gas too low")
|
|
ErrGasLimit = errors.New("Exceeds block gas limit")
|
|
ErrNegativeValue = errors.New("Negative value")
|
|
)
|
|
|
|
const (
|
|
maxQueued = 200 // max limit of queued txs per address
|
|
)
|
|
|
|
type stateFn func() *state.StateDB
|
|
|
|
// TxPool contains all currently known transactions. Transactions
|
|
// enter the pool when they are received from the network or submitted
|
|
// locally. They exit the pool when they are included in the blockchain.
|
|
//
|
|
// The pool separates processable transactions (which can be applied to the
|
|
// current state) and future transactions. Transactions move between those
|
|
// two states over time as they are received and processed.
|
|
type TxPool struct {
|
|
quit chan bool // Quiting channel
|
|
currentState stateFn // The state function which will allow us to do some pre checkes
|
|
pendingState *state.ManagedState
|
|
gasLimit func() *big.Int // The current gas limit function callback
|
|
minGasPrice *big.Int
|
|
eventMux *event.TypeMux
|
|
events event.Subscription
|
|
|
|
mu sync.RWMutex
|
|
pending map[common.Hash]*types.Transaction // processable transactions
|
|
queue map[common.Address]map[common.Hash]*types.Transaction
|
|
}
|
|
|
|
func NewTxPool(eventMux *event.TypeMux, currentStateFn stateFn, gasLimitFn func() *big.Int) *TxPool {
|
|
pool := &TxPool{
|
|
pending: make(map[common.Hash]*types.Transaction),
|
|
queue: make(map[common.Address]map[common.Hash]*types.Transaction),
|
|
quit: make(chan bool),
|
|
eventMux: eventMux,
|
|
currentState: currentStateFn,
|
|
gasLimit: gasLimitFn,
|
|
minGasPrice: new(big.Int),
|
|
pendingState: state.ManageState(currentStateFn()),
|
|
events: eventMux.Subscribe(ChainEvent{}, GasPriceChanged{}),
|
|
}
|
|
go pool.eventLoop()
|
|
|
|
return pool
|
|
}
|
|
|
|
func (pool *TxPool) eventLoop() {
|
|
// Track chain events. When a chain events occurs (new chain canon block)
|
|
// we need to know the new state. The new state will help us determine
|
|
// the nonces in the managed state
|
|
for ev := range pool.events.Chan() {
|
|
pool.mu.Lock()
|
|
|
|
switch ev := ev.(type) {
|
|
case ChainEvent:
|
|
pool.resetState()
|
|
case GasPriceChanged:
|
|
pool.minGasPrice = ev.Price
|
|
}
|
|
|
|
pool.mu.Unlock()
|
|
}
|
|
}
|
|
|
|
func (pool *TxPool) resetState() {
|
|
pool.pendingState = state.ManageState(pool.currentState())
|
|
|
|
// validate the pool of pending transactions, this will remove
|
|
// any transactions that have been included in the block or
|
|
// have been invalidated because of another transaction (e.g.
|
|
// higher gas price)
|
|
pool.validatePool()
|
|
|
|
// Loop over the pending transactions and base the nonce of the new
|
|
// pending transaction set.
|
|
for _, tx := range pool.pending {
|
|
if addr, err := tx.From(); err == nil {
|
|
// Set the nonce. Transaction nonce can never be lower
|
|
// than the state nonce; validatePool took care of that.
|
|
if pool.pendingState.GetNonce(addr) < tx.Nonce() {
|
|
pool.pendingState.SetNonce(addr, tx.Nonce())
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check the queue and move transactions over to the pending if possible
|
|
// or remove those that have become invalid
|
|
pool.checkQueue()
|
|
}
|
|
|
|
func (pool *TxPool) Stop() {
|
|
close(pool.quit)
|
|
pool.events.Unsubscribe()
|
|
glog.V(logger.Info).Infoln("TX Pool stopped")
|
|
}
|
|
|
|
func (pool *TxPool) State() *state.ManagedState {
|
|
pool.mu.RLock()
|
|
defer pool.mu.RUnlock()
|
|
|
|
return pool.pendingState
|
|
}
|
|
|
|
// validateTx checks whether a transaction is valid according
|
|
// to the consensus rules.
|
|
func (pool *TxPool) validateTx(tx *types.Transaction) error {
|
|
// Validate sender
|
|
var (
|
|
from common.Address
|
|
err error
|
|
)
|
|
|
|
// Drop transactions under our own minimal accepted gas price
|
|
if pool.minGasPrice.Cmp(tx.GasPrice()) > 0 {
|
|
return ErrCheap
|
|
}
|
|
|
|
// Validate the transaction sender and it's sig. Throw
|
|
// if the from fields is invalid.
|
|
if from, err = tx.From(); err != nil {
|
|
return ErrInvalidSender
|
|
}
|
|
|
|
// Make sure the account exist. Non existent accounts
|
|
// haven't got funds and well therefor never pass.
|
|
if !pool.currentState().HasAccount(from) {
|
|
return ErrNonExistentAccount
|
|
}
|
|
|
|
// Last but not least check for nonce errors
|
|
if pool.currentState().GetNonce(from) > tx.Nonce() {
|
|
return ErrNonce
|
|
}
|
|
|
|
// Check the transaction doesn't exceed the current
|
|
// block limit gas.
|
|
if pool.gasLimit().Cmp(tx.Gas()) < 0 {
|
|
return ErrGasLimit
|
|
}
|
|
|
|
// Transactions can't be negative. This may never happen
|
|
// using RLP decoded transactions but may occur if you create
|
|
// a transaction using the RPC for example.
|
|
if tx.Value().Cmp(common.Big0) < 0 {
|
|
return ErrNegativeValue
|
|
}
|
|
|
|
// Transactor should have enough funds to cover the costs
|
|
// cost == V + GP * GL
|
|
if pool.currentState().GetBalance(from).Cmp(tx.Cost()) < 0 {
|
|
return ErrInsufficientFunds
|
|
}
|
|
|
|
// Should supply enough intrinsic gas
|
|
if tx.Gas().Cmp(IntrinsicGas(tx.Data())) < 0 {
|
|
return ErrIntrinsicGas
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// validate and queue transactions.
|
|
func (self *TxPool) add(tx *types.Transaction) error {
|
|
hash := tx.Hash()
|
|
|
|
if self.pending[hash] != nil {
|
|
return fmt.Errorf("Known transaction (%x)", hash[:4])
|
|
}
|
|
err := self.validateTx(tx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
self.queueTx(hash, tx)
|
|
|
|
if glog.V(logger.Debug) {
|
|
var toname string
|
|
if to := tx.To(); to != nil {
|
|
toname = common.Bytes2Hex(to[:4])
|
|
} else {
|
|
toname = "[NEW_CONTRACT]"
|
|
}
|
|
// we can ignore the error here because From is
|
|
// verified in ValidateTransaction.
|
|
f, _ := tx.From()
|
|
from := common.Bytes2Hex(f[:4])
|
|
glog.Infof("(t) %x => %s (%v) %x\n", from, toname, tx.Value, hash)
|
|
}
|
|
|
|
// check and validate the queueue
|
|
self.checkQueue()
|
|
|
|
return nil
|
|
}
|
|
|
|
// queueTx will queue an unknown transaction
|
|
func (self *TxPool) queueTx(hash common.Hash, tx *types.Transaction) {
|
|
from, _ := tx.From() // already validated
|
|
if self.queue[from] == nil {
|
|
self.queue[from] = make(map[common.Hash]*types.Transaction)
|
|
}
|
|
self.queue[from][hash] = tx
|
|
}
|
|
|
|
// addTx will add a transaction to the pending (processable queue) list of transactions
|
|
func (pool *TxPool) addTx(hash common.Hash, addr common.Address, tx *types.Transaction) {
|
|
if _, ok := pool.pending[hash]; !ok {
|
|
pool.pending[hash] = tx
|
|
|
|
// Increment the nonce on the pending state. This can only happen if
|
|
// the nonce is +1 to the previous one.
|
|
pool.pendingState.SetNonce(addr, tx.Nonce()+1)
|
|
// Notify the subscribers. This event is posted in a goroutine
|
|
// because it's possible that somewhere during the post "Remove transaction"
|
|
// gets called which will then wait for the global tx pool lock and deadlock.
|
|
go pool.eventMux.Post(TxPreEvent{tx})
|
|
}
|
|
}
|
|
|
|
// Add queues a single transaction in the pool if it is valid.
|
|
func (self *TxPool) Add(tx *types.Transaction) error {
|
|
self.mu.Lock()
|
|
defer self.mu.Unlock()
|
|
|
|
return self.add(tx)
|
|
}
|
|
|
|
// AddTransactions attempts to queue all valid transactions in txs.
|
|
func (self *TxPool) AddTransactions(txs []*types.Transaction) {
|
|
self.mu.Lock()
|
|
defer self.mu.Unlock()
|
|
|
|
for _, tx := range txs {
|
|
if err := self.add(tx); err != nil {
|
|
glog.V(logger.Debug).Infoln("tx error:", err)
|
|
} else {
|
|
h := tx.Hash()
|
|
glog.V(logger.Debug).Infof("tx %x\n", h[:4])
|
|
}
|
|
}
|
|
}
|
|
|
|
// GetTransaction returns a transaction if it is contained in the pool
|
|
// and nil otherwise.
|
|
func (tp *TxPool) GetTransaction(hash common.Hash) *types.Transaction {
|
|
// check the txs first
|
|
if tx, ok := tp.pending[hash]; ok {
|
|
return tx
|
|
}
|
|
// check queue
|
|
for _, txs := range tp.queue {
|
|
if tx, ok := txs[hash]; ok {
|
|
return tx
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// GetTransactions returns all currently processable transactions.
|
|
// The returned slice may be modified by the caller.
|
|
func (self *TxPool) GetTransactions() (txs types.Transactions) {
|
|
self.mu.Lock()
|
|
defer self.mu.Unlock()
|
|
|
|
// check queue first
|
|
self.checkQueue()
|
|
// invalidate any txs
|
|
self.validatePool()
|
|
|
|
txs = make(types.Transactions, len(self.pending))
|
|
i := 0
|
|
for _, tx := range self.pending {
|
|
txs[i] = tx
|
|
i++
|
|
}
|
|
return txs
|
|
}
|
|
|
|
// GetQueuedTransactions returns all non-processable transactions.
|
|
func (self *TxPool) GetQueuedTransactions() types.Transactions {
|
|
self.mu.RLock()
|
|
defer self.mu.RUnlock()
|
|
|
|
var ret types.Transactions
|
|
for _, txs := range self.queue {
|
|
for _, tx := range txs {
|
|
ret = append(ret, tx)
|
|
}
|
|
}
|
|
sort.Sort(types.TxByNonce{ret})
|
|
return ret
|
|
}
|
|
|
|
// RemoveTransactions removes all given transactions from the pool.
|
|
func (self *TxPool) RemoveTransactions(txs types.Transactions) {
|
|
self.mu.Lock()
|
|
defer self.mu.Unlock()
|
|
for _, tx := range txs {
|
|
self.removeTx(tx.Hash())
|
|
}
|
|
}
|
|
|
|
// checkQueue moves transactions that have become processable to main pool.
|
|
func (pool *TxPool) checkQueue() {
|
|
state := pool.pendingState
|
|
|
|
var addq txQueue
|
|
for address, txs := range pool.queue {
|
|
// guessed nonce is the nonce currently kept by the tx pool (pending state)
|
|
guessedNonce := state.GetNonce(address)
|
|
// true nonce is the nonce known by the last state
|
|
trueNonce := pool.currentState().GetNonce(address)
|
|
addq := addq[:0]
|
|
for hash, tx := range txs {
|
|
if tx.Nonce() < trueNonce {
|
|
// Drop queued transactions whose nonce is lower than
|
|
// the account nonce because they have been processed.
|
|
delete(txs, hash)
|
|
} else {
|
|
// Collect the remaining transactions for the next pass.
|
|
addq = append(addq, txQueueEntry{hash, address, tx})
|
|
}
|
|
}
|
|
// Find the next consecutive nonce range starting at the
|
|
// current account nonce.
|
|
sort.Sort(addq)
|
|
for i, e := range addq {
|
|
// start deleting the transactions from the queue if they exceed the limit
|
|
if i > maxQueued {
|
|
if glog.V(logger.Debug) {
|
|
glog.Infof("Queued tx limit exceeded for %s. Tx %s removed\n", common.PP(address[:]), common.PP(e.hash[:]))
|
|
}
|
|
delete(pool.queue[address], e.hash)
|
|
continue
|
|
}
|
|
if e.Nonce() > guessedNonce {
|
|
break
|
|
}
|
|
delete(txs, e.hash)
|
|
pool.addTx(e.hash, address, e.Transaction)
|
|
}
|
|
// Delete the entire queue entry if it became empty.
|
|
if len(txs) == 0 {
|
|
delete(pool.queue, address)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (pool *TxPool) removeTx(hash common.Hash) {
|
|
// delete from pending pool
|
|
delete(pool.pending, hash)
|
|
// delete from queue
|
|
for address, txs := range pool.queue {
|
|
if _, ok := txs[hash]; ok {
|
|
if len(txs) == 1 {
|
|
// if only one tx, remove entire address entry.
|
|
delete(pool.queue, address)
|
|
} else {
|
|
delete(txs, hash)
|
|
}
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
// validatePool removes invalid and processed transactions from the main pool.
|
|
func (pool *TxPool) validatePool() {
|
|
state := pool.currentState()
|
|
for hash, tx := range pool.pending {
|
|
from, _ := tx.From() // err already checked
|
|
// perform light nonce validation
|
|
if state.GetNonce(from) > tx.Nonce() {
|
|
if glog.V(logger.Core) {
|
|
glog.Infof("removed tx (%x) from pool: low tx nonce\n", hash[:4])
|
|
}
|
|
delete(pool.pending, hash)
|
|
}
|
|
}
|
|
}
|
|
|
|
type txQueue []txQueueEntry
|
|
|
|
type txQueueEntry struct {
|
|
hash common.Hash
|
|
addr common.Address
|
|
*types.Transaction
|
|
}
|
|
|
|
func (q txQueue) Len() int { return len(q) }
|
|
func (q txQueue) Swap(i, j int) { q[i], q[j] = q[j], q[i] }
|
|
func (q txQueue) Less(i, j int) bool { return q[i].Nonce() < q[j].Nonce() }
|