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order_pool.go
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order_pool.go
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// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package core
import (
"errors"
"fmt"
"math/big"
"sort"
"sync"
"time"
"github.com/XinFinOrg/XDPoSChain/XDCx/tradingstate"
"github.com/XinFinOrg/XDPoSChain/consensus"
"github.com/XinFinOrg/XDPoSChain/consensus/XDPoS"
"github.com/XinFinOrg/XDPoSChain/common"
"github.com/XinFinOrg/XDPoSChain/core/state"
"github.com/XinFinOrg/XDPoSChain/core/types"
"github.com/XinFinOrg/XDPoSChain/event"
"github.com/XinFinOrg/XDPoSChain/log"
"github.com/XinFinOrg/XDPoSChain/params"
"gopkg.in/karalabe/cookiejar.v2/collections/prque"
)
var (
// ErrInvalidOrderFormat is returned if the order transaction contains an invalid field.
ErrInvalidOrderFormat = errors.New("invalid order format")
ErrInvalidOrderContent = errors.New("invalid order content")
ErrInvalidOrderSide = errors.New("invalid order side")
ErrInvalidOrderType = errors.New("invalid order type")
ErrInvalidOrderStatus = errors.New("invalid order status")
ErrInvalidOrderUserAddress = errors.New("invalid order user address")
ErrInvalidOrderQuantity = errors.New("invalid order quantity")
ErrInvalidOrderPrice = errors.New("invalid order price")
ErrInvalidOrderHash = errors.New("invalid order hash")
ErrInvalidCancelledOrder = errors.New("invalid cancel orderid")
)
var (
OrderTypeLimit = "LO"
OrderTypeMarket = "MO"
OrderStatusNew = "NEW"
OrderStatusCancle = "CANCELLED"
OrderSideBid = "BUY"
OrderSideAsk = "SELL"
)
var (
ErrPendingNonceTooLow = errors.New("pending nonce too low")
ErrPoolOverflow = errors.New("Exceed pool size")
)
// OrderPoolConfig are the configuration parameters of the order transaction pool.
type OrderPoolConfig struct {
NoLocals bool // Whether local transaction handling should be disabled
Journal string // Journal of local transactions to survive node restarts
Rejournal time.Duration // Time interval to regenerate the local transaction journal
AccountSlots uint64 // Minimum number of executable transaction slots guaranteed per account
GlobalSlots uint64 // Maximum number of executable transaction slots for all accounts
AccountQueue uint64 // Maximum number of non-executable transaction slots permitted per account
GlobalQueue uint64 // Maximum number of non-executable transaction slots for all accounts
Lifetime time.Duration // Maximum amount of time non-executable transaction are queued
}
// blockChain_XDCx add order state
type blockChainXDCx interface {
CurrentBlock() *types.Block
GetBlock(hash common.Hash, number uint64) *types.Block
OrderStateAt(block *types.Block) (*tradingstate.TradingStateDB, error)
StateAt(root common.Hash) (*state.StateDB, error)
SubscribeChainHeadEvent(ch chan<- ChainHeadEvent) event.Subscription
Engine() consensus.Engine
// GetHeader returns the hash corresponding to their hash.
GetHeader(common.Hash, uint64) *types.Header
// CurrentHeader retrieves the current header from the local chain.
CurrentHeader() *types.Header
// Config retrieves the blockchain's chain configuration.
Config() *params.ChainConfig
}
// DefaultOrderPoolConfig contains the default configurations for the transaction
// pool.
var DefaultOrderPoolConfig = OrderPoolConfig{
Journal: "",
Rejournal: time.Hour,
AccountSlots: 16,
GlobalSlots: 4096,
AccountQueue: 64,
GlobalQueue: 1024,
Lifetime: 3 * time.Hour,
}
// sanitize checks the provided user configurations and changes anything that's
// unreasonable or unworkable.
func (config *OrderPoolConfig) sanitize() OrderPoolConfig {
conf := *config
if conf.Rejournal < time.Second {
log.Warn("Sanitizing invalid OrderPool journal time", "provided", conf.Rejournal, "updated", time.Second)
conf.Rejournal = time.Second
}
return conf
}
// OrderPool 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 OrderPool struct {
config OrderPoolConfig
chainconfig *params.ChainConfig
chain blockChainXDCx
txFeed event.Feed
scope event.SubscriptionScope
chainHeadCh chan ChainHeadEvent
chainHeadSub event.Subscription
signer types.OrderSigner
mu sync.RWMutex
currentRootState *state.StateDB
currentOrderState *tradingstate.TradingStateDB // Current order state in the blockchain head
pendingState *tradingstate.XDCXManagedState // Pending state tracking virtual nonces
locals *orderAccountSet // Set of local transaction to exempt from eviction rules
journal *ordertxJournal // Journal of local transaction to back up to disk
pending map[common.Address]*ordertxList // All currently processable transactions
queue map[common.Address]*ordertxList // Queued but non-processable transactions
beats map[common.Address]time.Time // Last heartbeat from each known account
all map[common.Hash]*types.OrderTransaction // All transactions to allow lookups
wg sync.WaitGroup // for shutdown sync
homestead bool
IsSigner func(address common.Address) bool
}
// NewOrderPool creates a new transaction pool to gather, sort and filter inbound
// transactions from the network.
func NewOrderPool(chainconfig *params.ChainConfig, chain blockChainXDCx) *OrderPool {
// Sanitize the input to ensure no vulnerable gas prices are set
config := (&DefaultOrderPoolConfig).sanitize()
log.Debug("NewOrderPool start...", "current block", chain.CurrentBlock().Header().Number)
// Create the transaction pool with its initial settings
pool := &OrderPool{
config: config,
chainconfig: chainconfig,
chain: chain,
signer: types.OrderTxSigner{},
pending: make(map[common.Address]*ordertxList),
queue: make(map[common.Address]*ordertxList),
beats: make(map[common.Address]time.Time),
all: make(map[common.Hash]*types.OrderTransaction),
chainHeadCh: make(chan ChainHeadEvent, chainHeadChanSize),
}
pool.locals = newOrderAccountSet(pool.signer)
pool.reset(nil, chain.CurrentBlock())
// If local transactions and journaling is enabled, load from disk
if !config.NoLocals && config.Journal != "" {
pool.journal = newOrderTxJournal(config.Journal)
if err := pool.journal.load(pool.AddLocal); err != nil {
log.Warn("Failed to load transaction journal", "err", err)
}
if err := pool.journal.rotate(pool.local()); err != nil {
log.Warn("Failed to rotate transaction journal", "err", err)
}
}
// Subscribe events from blockchain
pool.chainHeadSub = pool.chain.SubscribeChainHeadEvent(pool.chainHeadCh)
// Start the event loop and return
pool.wg.Add(1)
go pool.loop()
return pool
}
// loop is the transaction pool's main event loop, waiting for and reacting to
// outside blockchain events as well as for various reporting and transaction
// eviction events.
func (pool *OrderPool) loop() {
defer pool.wg.Done()
// Start the stats reporting and transaction eviction tickers
report := time.NewTicker(statsReportInterval)
defer report.Stop()
evict := time.NewTicker(evictionInterval)
defer evict.Stop()
journal := time.NewTicker(pool.config.Rejournal)
defer journal.Stop()
// Track the previous head headers for transaction reorgs
head := pool.chain.CurrentBlock()
// Keep waiting for and reacting to the various events
for {
select {
// Handle ChainHeadEvent
case ev := <-pool.chainHeadCh:
if ev.Block != nil {
pool.mu.Lock()
if pool.chainconfig.IsHomestead(ev.Block.Number()) {
pool.homestead = true
}
log.Debug("OrderPool new chain header reset pool", "old", head.Header().Number, "new", ev.Block.Header().Number)
pool.reset(head, ev.Block)
head = ev.Block
pool.mu.Unlock()
}
// Be unsubscribed due to system stopped
case <-pool.chainHeadSub.Err():
return
// Handle stats reporting ticks
case <-report.C:
pool.mu.RLock()
pending, queued := pool.stats()
pool.mu.RUnlock()
log.Debug("Order pool status report", "executable", pending, "queued", queued)
// Handle inactive account transaction eviction
case <-evict.C:
pool.mu.Lock()
for addr := range pool.queue {
// Skip local transactions from the eviction mechanism
if pool.locals.contains(addr) {
continue
}
// Any non-locals old enough should be removed
if time.Since(pool.beats[addr]) > pool.config.Lifetime {
for _, tx := range pool.queue[addr].Flatten() {
pool.removeTx(tx.Hash())
}
}
}
pool.mu.Unlock()
// Handle local transaction journal rotation
case <-journal.C:
if pool.journal != nil {
pool.mu.Lock()
if err := pool.journal.rotate(pool.local()); err != nil {
log.Warn("Failed to rotate local tx journal", "err", err)
}
pool.mu.Unlock()
}
}
}
}
// reset retrieves the current state of the blockchain and ensures the content
// of the transaction pool is valid with regard to the chain state.
func (pool *OrderPool) reset(oldHead, newblock *types.Block) {
if !pool.chainconfig.IsTIPXDCX(pool.chain.CurrentBlock().Number()) || pool.chain.Config().XDPoS == nil || pool.chain.CurrentBlock().NumberU64() <= pool.chain.Config().XDPoS.Epoch {
return
}
// If we're reorging an old state, reinject all dropped transactions
var reinject types.OrderTransactions
// Initialize the internal state to the current head
if newblock == nil {
newblock = pool.chain.CurrentBlock()
}
newHead := newblock.Header()
orderstate, err := pool.chain.OrderStateAt(newblock)
if err != nil {
log.Error("Failed to reset OrderPool state", "err", err)
return
}
pool.currentOrderState = orderstate
pool.pendingState = tradingstate.ManageState(orderstate)
state, err := pool.chain.StateAt(newHead.Root)
if err != nil {
log.Error("Failed to reset pool state", "err", err)
return
}
pool.currentRootState = state
// Inject any transactions discarded due to reorgs
log.Debug("Reinjecting stale transactions", "count", len(reinject))
pool.addTxsLocked(reinject, false)
// 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.demoteUnexecutables()
// Update all accounts to the latest known pending nonce
for addr, list := range pool.pending {
txs := list.Flatten() // Heavy but will be cached and is needed by the miner anyway
pool.pendingState.SetNonce(addr.Hash(), txs[len(txs)-1].Nonce()+1)
}
// Check the queue and move transactions over to the pending if possible
// or remove those that have become invalid
pool.promoteExecutables(nil)
}
// Stop terminates the transaction pool.
func (pool *OrderPool) Stop() {
// Unsubscribe all subscriptions registered from OrderPool
pool.scope.Close()
// Unsubscribe subscriptions registered from blockchain
pool.chainHeadSub.Unsubscribe()
pool.wg.Wait()
if pool.journal != nil {
pool.journal.close()
}
log.Info("Transaction pool stopped")
}
// SubscribeTxPreEvent registers a subscription of TxPreEvent and
// starts sending event to the given channel.
func (pool *OrderPool) SubscribeTxPreEvent(ch chan<- OrderTxPreEvent) event.Subscription {
return pool.scope.Track(pool.txFeed.Subscribe(ch))
}
// State returns the virtual managed state of the transaction pool.
func (pool *OrderPool) State() *tradingstate.XDCXManagedState {
pool.mu.RLock()
defer pool.mu.RUnlock()
return pool.pendingState
}
// Stats retrieves the current pool stats, namely the number of pending and the
// number of queued (non-executable) transactions.
func (pool *OrderPool) Stats() (int, int) {
pool.mu.RLock()
defer pool.mu.RUnlock()
return pool.stats()
}
// stats retrieves the current pool stats, namely the number of pending and the
// number of queued (non-executable) transactions.
func (pool *OrderPool) stats() (int, int) {
pending := 0
for _, list := range pool.pending {
pending += list.Len()
}
queued := 0
for _, list := range pool.queue {
queued += list.Len()
}
return pending, queued
}
// Content retrieves the data content of the transaction pool, returning all the
// pending as well as queued transactions, grouped by account and sorted by nonce.
func (pool *OrderPool) Content() (map[common.Address]types.OrderTransactions, map[common.Address]types.OrderTransactions) {
pool.mu.Lock()
defer pool.mu.Unlock()
pending := make(map[common.Address]types.OrderTransactions)
for addr, list := range pool.pending {
pending[addr] = list.Flatten()
}
queued := make(map[common.Address]types.OrderTransactions)
for addr, list := range pool.queue {
queued[addr] = list.Flatten()
}
return pending, queued
}
// Pending retrieves all currently processable transactions, groupped by origin
// account and sorted by nonce. The returned transaction set is a copy and can be
// freely modified by calling code.
func (pool *OrderPool) Pending() (map[common.Address]types.OrderTransactions, error) {
pool.mu.Lock()
defer pool.mu.Unlock()
pending := make(map[common.Address]types.OrderTransactions)
for addr, list := range pool.pending {
pending[addr] = list.Flatten()
}
return pending, nil
}
// local retrieves all currently known local transactions, groupped by origin
// account and sorted by nonce. The returned transaction set is a copy and can be
// freely modified by calling code.
func (pool *OrderPool) local() map[common.Address]types.OrderTransactions {
txs := make(map[common.Address]types.OrderTransactions)
for addr := range pool.locals.accounts {
if pending := pool.pending[addr]; pending != nil {
txs[addr] = append(txs[addr], pending.Flatten()...)
}
if queued := pool.queue[addr]; queued != nil {
txs[addr] = append(txs[addr], queued.Flatten()...)
}
}
return txs
}
// GetSender get sender from transaction
func (pool *OrderPool) GetSender(tx *types.OrderTransaction) (common.Address, error) {
from, err := types.OrderSender(pool.signer, tx)
if err != nil {
return common.Address{}, ErrInvalidSender
}
return from, nil
}
func (pool *OrderPool) validateOrder(tx *types.OrderTransaction) error {
orderSide := tx.Side()
orderType := tx.Type()
orderStatus := tx.Status()
price := tx.Price()
quantity := tx.Quantity()
cloneStateDb := pool.currentRootState.Copy()
cloneXDCXStateDb := pool.currentOrderState.Copy()
if !tx.IsCancelledOrder() {
if quantity == nil || quantity.Cmp(big.NewInt(0)) <= 0 {
return ErrInvalidOrderQuantity
}
if orderType != OrderTypeMarket {
if price == nil || price.Cmp(big.NewInt(0)) <= 0 {
return ErrInvalidOrderPrice
}
}
if orderSide != OrderSideAsk && orderSide != OrderSideBid {
return ErrInvalidOrderSide
}
if orderType != OrderTypeLimit && orderType != OrderTypeMarket {
return ErrInvalidOrderType
}
if err := tradingstate.VerifyPair(cloneStateDb, tx.ExchangeAddress(), tx.BaseToken(), tx.QuoteToken()); err != nil {
return err
}
if orderType == OrderTypeLimit {
XDPoSEngine, ok := pool.chain.Engine().(*XDPoS.XDPoS)
if !ok {
return ErrNotXDPoS
}
XDCXServ := XDPoSEngine.GetXDCXService()
if XDCXServ == nil {
return fmt.Errorf("XDCx not found in order validation")
}
baseDecimal, err := XDCXServ.GetTokenDecimal(pool.chain, cloneStateDb, tx.BaseToken())
if err != nil {
return fmt.Errorf("validateOrder: failed to get baseDecimal. err: %v", err)
}
quoteDecimal, err := XDCXServ.GetTokenDecimal(pool.chain, cloneStateDb, tx.QuoteToken())
if err != nil {
return fmt.Errorf("validateOrder: failed to get quoteDecimal. err: %v", err)
}
if err := tradingstate.VerifyBalance(cloneStateDb, cloneXDCXStateDb, tx, baseDecimal, quoteDecimal); err != nil {
return err
}
}
}
if orderStatus != OrderStatusNew && orderStatus != OrderStatusCancle {
return ErrInvalidOrderStatus
}
var signer = types.OrderTxSigner{}
if !tx.IsCancelledOrder() {
if !common.EmptyHash(tx.OrderHash()) {
if signer.Hash(tx) != tx.OrderHash() {
return ErrInvalidOrderHash
}
} else {
tx.SetOrderHash(signer.Hash(tx))
}
} else {
if tx.OrderID() == 0 {
return ErrInvalidCancelledOrder
}
originOrder := cloneXDCXStateDb.GetOrder(tradingstate.GetTradingOrderBookHash(tx.BaseToken(), tx.QuoteToken()), common.BigToHash(new(big.Int).SetUint64(tx.OrderID())))
if originOrder == tradingstate.EmptyOrder {
log.Debug("Order not found ", "OrderId", tx.OrderID(), "BaseToken", tx.BaseToken().Hex(), "QuoteToken", tx.QuoteToken().Hex())
return ErrInvalidCancelledOrder
}
if originOrder.Hash != tx.OrderHash() {
log.Debug("Invalid order hash", "expected", originOrder.Hash.Hex(), "got", tx.OrderHash().Hex())
return ErrInvalidOrderHash
}
}
from, _ := types.OrderSender(pool.signer, tx)
if from != tx.UserAddress() {
return ErrInvalidOrderUserAddress
}
if !tradingstate.IsValidRelayer(cloneStateDb, tx.ExchangeAddress()) {
return fmt.Errorf("invalid relayer. ExchangeAddress: %s", tx.ExchangeAddress().Hex())
}
return nil
}
// validateTx checks whether a transaction is valid according to the consensus
// rules and adheres to some heuristic limits of the local node (price and size).
func (pool *OrderPool) validateTx(tx *types.OrderTransaction, local bool) error {
// check if sender is in black list
if tx.From() != nil && common.Blacklist[*tx.From()] {
return fmt.Errorf("Reject transaction with sender in black-list: %v", tx.From().Hex())
}
// Heuristic limit, reject transactions over 32KB to prevent DOS attacks
if tx.Size() > 32*1024 {
return ErrOversizedData
}
// Make sure the transaction is signed properly
from, err := types.OrderSender(pool.signer, tx)
if err != nil {
return ErrInvalidSender
}
err = pool.validateOrder(tx)
if err != nil {
return err
}
// Ensure the transaction adheres to nonce ordering
if pool.currentOrderState.GetNonce(from.Hash()) > tx.Nonce() {
return ErrNonceTooLow
}
if pool.pendingState.GetNonce(from.Hash())+common.LimitThresholdNonceInQueue < tx.Nonce() {
return ErrNonceTooHigh
}
return nil
}
// add validates a transaction and inserts it into the non-executable queue for
// later pending promotion and execution. If the transaction is a replacement for
// an already pending or queued one, it overwrites the previous and returns this
// so outer code doesn't uselessly call promote.
//
// If a newly added transaction is marked as local, its sending account will be
// whitelisted, preventing any associated transaction from being dropped out of
// the pool due to pricing constraints.
func (pool *OrderPool) add(tx *types.OrderTransaction, local bool) (bool, error) {
// If the transaction is already known, discard it
hash := tx.Hash()
if pool.all[hash] != nil {
log.Debug("Discarding known order transaction", "hash", hash, "userAddress", tx.UserAddress().Hex(), "status", tx.Status)
return false, fmt.Errorf("known transaction: %x", hash)
}
// If the transaction fails basic validation, discard it
if err := pool.validateTx(tx, local); err != nil {
log.Debug("Discarding invalid order transaction", "hash", hash, "userAddress", tx.UserAddress().Hex(), "status", tx.Status, "err", err)
invalidTxCounter.Inc(1)
return false, err
}
from, _ := types.OrderSender(pool.signer, tx) // already validated
// If the transaction pool is full, discard underpriced transactions
if uint64(len(pool.all)) >= pool.config.GlobalSlots+pool.config.GlobalQueue {
log.Debug("Add order transaction to pool full", "hash", hash, "nonce", tx.Nonce())
return false, ErrPoolOverflow
}
// If the transaction is replacing an already pending one, do directly
if list := pool.pending[from]; list != nil && list.Overlaps(tx) {
inserted, old := list.Add(tx)
if !inserted {
pendingDiscardCounter.Inc(1)
return false, ErrPendingNonceTooLow
}
if old != nil {
delete(pool.all, old.Hash())
pendingReplaceCounter.Inc(1)
}
pool.all[tx.Hash()] = tx
pool.journalTx(from, tx)
log.Debug("Pooled new executable transaction", "hash", hash, "useraddress", tx.UserAddress().Hex(), "nonce", tx.Nonce(), "status", tx.Status(), "orderid", tx.OrderID())
go pool.txFeed.Send(OrderTxPreEvent{tx})
return old != nil, nil
}
// New transaction isn't replacing a pending one, push into queue
replace, err := pool.enqueueTx(hash, tx)
if err != nil {
return false, err
}
// Mark local addresses and journal local transactions
if local {
pool.locals.add(from)
}
pool.journalTx(from, tx)
log.Debug("Pooled new future transaction", "hash", hash, "from", from)
return replace, nil
}
// enqueueTx inserts a new transaction into the non-executable transaction queue.
//
// Note, this method assumes the pool lock is held!
func (pool *OrderPool) enqueueTx(hash common.Hash, tx *types.OrderTransaction) (bool, error) {
// Try to insert the transaction into the future queue
log.Debug("enqueueTx", "hash", hash, "useraddress", tx.UserAddress().Hex(), "nonce", tx.Nonce(), "status", tx.Status(), "orderid", tx.OrderID())
from, _ := types.OrderSender(pool.signer, tx) // already validated
if pool.queue[from] == nil {
pool.queue[from] = newOrderTxList(false)
}
inserted, old := pool.queue[from].Add(tx)
if !inserted {
// An older transaction was better, discard this
queuedDiscardCounter.Inc(1)
return false, ErrPendingNonceTooLow
}
// Discard any previous transaction and mark this
if old != nil {
delete(pool.all, old.Hash())
queuedReplaceCounter.Inc(1)
}
pool.all[hash] = tx
return old != nil, nil
}
// journalTx adds the specified transaction to the local disk journal if it is
// deemed to have been sent from a local account.
func (pool *OrderPool) journalTx(from common.Address, tx *types.OrderTransaction) {
// Only journal if it's enabled and the transaction is local
if pool.journal == nil || !pool.locals.contains(from) {
return
}
if err := pool.journal.insert(tx); err != nil {
log.Warn("Failed to journal local transaction", "err", err)
}
}
// promoteTx adds a transaction to the pending (processable) list of transactions.
//
// Note, this method assumes the pool lock is held!
func (pool *OrderPool) promoteTx(addr common.Address, hash common.Hash, tx *types.OrderTransaction) {
// Try to insert the transaction into the pending queue
log.Debug("promoteTx", "addr", tx.UserAddress().Hex(), "nonce", tx.Nonce(), "ohash", tx.OrderHash().Hex(), "status", tx.Status(), "orderid", tx.OrderID())
if pool.pending[addr] == nil {
pool.pending[addr] = newOrderTxList(true)
}
list := pool.pending[addr]
inserted, old := list.Add(tx)
if !inserted {
// An older transaction was better, discard this
delete(pool.all, hash)
pendingDiscardCounter.Inc(1)
return
}
// Otherwise discard any previous transaction and mark this
if old != nil {
delete(pool.all, old.Hash())
pendingReplaceCounter.Inc(1)
}
// Failsafe to work around direct pending inserts (tests)
if pool.all[hash] == nil {
pool.all[hash] = tx
}
// Set the potentially new pending nonce and notify any subsystems of the new tx
pool.beats[addr] = time.Now()
pool.pendingState.SetNonce(addr.Hash(), tx.Nonce()+1)
log.Debug("promoteTx txFeed.Send", "addr", tx.UserAddress().Hex(), "nonce", tx.Nonce(), "ohash", tx.OrderHash().Hex(), "status", tx.Status(), "orderid", tx.OrderID())
go pool.txFeed.Send(OrderTxPreEvent{tx})
}
// AddLocal enqueues a single transaction into the pool if it is valid, marking
// the sender as a local one in the mean time, ensuring it goes around the local
// pricing constraints.
func (pool *OrderPool) AddLocal(tx *types.OrderTransaction) error {
log.Debug("AddLocal order add local tx", "addr", tx.UserAddress().Hex(), "nonce", tx.Nonce(), "ohash", tx.OrderHash().Hex(), "status", tx.Status(), "orderid", tx.OrderID())
return pool.addTx(tx, !pool.config.NoLocals)
}
// AddRemote enqueues a single transaction into the pool if it is valid. If the
// sender is not among the locally tracked ones, full pricing constraints will
// apply.
func (pool *OrderPool) AddRemote(tx *types.OrderTransaction) error {
log.Debug("AddRemote", "addr", tx.UserAddress().Hex(), "nonce", tx.Nonce(), "ohash", tx.OrderHash().Hex(), "status", tx.Status(), "orderid", tx.OrderID())
return pool.addTx(tx, false)
}
// AddLocals enqueues a batch of transactions into the pool if they are valid,
// marking the senders as a local ones in the mean time, ensuring they go around
// the local pricing constraints.
func (pool *OrderPool) AddLocals(txs []*types.OrderTransaction) []error {
return pool.addTxs(txs, !pool.config.NoLocals)
}
// AddRemotes enqueues a batch of transactions into the pool if they are valid.
// If the senders are not among the locally tracked ones, full pricing constraints
// will apply.
func (pool *OrderPool) AddRemotes(txs []*types.OrderTransaction) []error {
for _, tx := range txs {
log.Debug("AddRemotes", "addr", tx.UserAddress().Hex(), "nonce", tx.Nonce(), "ohash", tx.OrderHash().Hex(), "status", tx.Status(), "orderid", tx.OrderID())
}
return pool.addTxs(txs, false)
}
// addTx enqueues a single transaction into the pool if it is valid.
func (pool *OrderPool) addTx(tx *types.OrderTransaction, local bool) error {
if !pool.chainconfig.IsTIPXDCX(pool.chain.CurrentBlock().Number()) {
return nil
}
tx.CacheHash()
types.CacheOrderSigner(pool.signer, tx)
pool.mu.Lock()
defer pool.mu.Unlock()
// Try to inject the transaction and update any state
replace, err := pool.add(tx, local)
if err != nil {
return err
}
// If we added a new transaction, run promotion checks and return
if !replace {
from, _ := types.OrderSender(pool.signer, tx) // already validated
pool.promoteExecutables([]common.Address{from})
}
return nil
}
// addTxs attempts to queue a batch of transactions if they are valid.
func (pool *OrderPool) addTxs(txs []*types.OrderTransaction, local bool) []error {
pool.mu.Lock()
defer pool.mu.Unlock()
return pool.addTxsLocked(txs, local)
}
// addTxsLocked attempts to queue a batch of transactions if they are valid,
// whilst assuming the transaction pool lock is already held.
func (pool *OrderPool) addTxsLocked(txs []*types.OrderTransaction, local bool) []error {
// Add the batch of transaction, tracking the accepted ones
dirty := make(map[common.Address]struct{})
errs := make([]error, len(txs))
for i, tx := range txs {
var replace bool
if replace, errs[i] = pool.add(tx, local); errs[i] == nil {
if !replace {
from, _ := types.OrderSender(pool.signer, tx) // already validated
dirty[from] = struct{}{}
}
}
}
// Only reprocess the internal state if something was actually added
if len(dirty) > 0 {
addrs := make([]common.Address, 0, len(dirty))
for addr := range dirty {
addrs = append(addrs, addr)
}
pool.promoteExecutables(addrs)
}
return errs
}
// Status returns the status (unknown/pending/queued) of a batch of transactions
// identified by their hashes.
func (pool *OrderPool) Status(hashes []common.Hash) []TxStatus {
pool.mu.RLock()
defer pool.mu.RUnlock()
status := make([]TxStatus, len(hashes))
for i, hash := range hashes {
if tx := pool.all[hash]; tx != nil {
from, _ := types.OrderSender(pool.signer, tx) // already validated
if pool.pending[from] != nil && pool.pending[from].txs.items[tx.Nonce()] != nil {
status[i] = TxStatusPending
} else {
status[i] = TxStatusQueued
}
}
}
return status
}
// Get returns a transaction if it is contained in the pool
// and nil otherwise.
func (pool *OrderPool) Get(hash common.Hash) *types.OrderTransaction {
pool.mu.RLock()
defer pool.mu.RUnlock()
return pool.all[hash]
}
// removeTx removes a single transaction from the queue, moving all subsequent
// transactions back to the future queue.
func (pool *OrderPool) removeTx(hash common.Hash) {
// Fetch the transaction we wish to delete
tx, ok := pool.all[hash]
if !ok {
return
}
addr, _ := types.OrderSender(pool.signer, tx) // already validated during insertion
// Remove it from the list of known transactions
delete(pool.all, hash)
// Remove the transaction from the pending lists and reset the account nonce
if pending := pool.pending[addr]; pending != nil {
if removed, invalids := pending.Remove(tx); removed {
// If no more pending transactions are left, remove the list
if pending.Empty() {
delete(pool.pending, addr)
delete(pool.beats, addr)
}
// Postpone any invalidated transactions
for _, tx := range invalids {
pool.enqueueTx(tx.Hash(), tx)
}
// Update the account nonce if needed
if nonce := tx.Nonce(); pool.pendingState.GetNonce(addr.Hash()) > nonce {
pool.pendingState.SetNonce(addr.Hash(), nonce)
}
return
}
}
// Transaction is in the future queue
if future := pool.queue[addr]; future != nil {
future.Remove(tx)
if future.Empty() {
delete(pool.queue, addr)
}
}
}
// promoteExecutables moves transactions that have become processable from the
// future queue to the set of pending transactions. During this process, all
// invalidated transactions (low nonce, low balance) are deleted.
func (pool *OrderPool) promoteExecutables(accounts []common.Address) {
defer func(start time.Time) {
log.Debug("end promoteExecutables", "time", common.PrettyDuration(time.Since(start)))
}(time.Now())
// Gather all the accounts potentially needing updates
if accounts == nil {
accounts = make([]common.Address, 0, len(pool.queue))
for addr := range pool.queue {
accounts = append(accounts, addr)
}
}
// Iterate over all accounts and promote any executable transactions
for _, addr := range accounts {
list := pool.queue[addr]
if list == nil {
continue // Just in case someone calls with a non existing account
}
// Drop all transactions that are deemed too old (low nonce)
for _, tx := range list.Forward(pool.currentOrderState.GetNonce(addr.Hash())) {
hash := tx.Hash()
log.Debug("Removed old queued transaction", "addr", tx.UserAddress().Hex(), "nonce", tx.Nonce(), "ohash", tx.OrderHash().Hex(), "status", tx.Status(), "orderid", tx.OrderID())
delete(pool.all, hash)
}
// Gather all executable transactions and promote them
for _, tx := range list.Ready(pool.pendingState.GetNonce(addr.Hash())) {
hash := tx.Hash()
log.Debug("Promoting queued transaction", "addr", tx.UserAddress().Hex(), "nonce", tx.Nonce(), "ohash", tx.OrderHash().Hex(), "status", tx.Status(), "orderid", tx.OrderID())
pool.promoteTx(addr, hash, tx)
}
// Drop all transactions over the allowed limit
if !pool.locals.contains(addr) {
for _, tx := range list.Cap(int(pool.config.AccountQueue)) {
hash := tx.Hash()
delete(pool.all, hash)
queuedRateLimitCounter.Inc(1)
log.Debug("Removed cap-exceeding queued transaction", "addr", tx.UserAddress().Hex(), "nonce", tx.Nonce(), "ohash", tx.OrderHash().Hex(), "status", tx.Status(), "orderid", tx.OrderID())
}
}
// Delete the entire queue entry if it became empty.
if list.Empty() {
log.Debug("promoteExecutables remove transaction queue", "addr", addr.Hex())
delete(pool.queue, addr)
}
}
// If the pending limit is overflown, start equalizing allowances
pending := uint64(0)
for _, list := range pool.pending {
pending += uint64(list.Len())
}
if pending > pool.config.GlobalSlots {
pendingBeforeCap := pending
// Assemble a spam order to penalize large transactors first
spammers := prque.New()
for addr, list := range pool.pending {
// Only evict transactions from high rollers
if !pool.locals.contains(addr) && uint64(list.Len()) > pool.config.AccountSlots {
spammers.Push(addr, float32(list.Len()))
}
}
// Gradually drop transactions from offenders
offenders := []common.Address{}
for pending > pool.config.GlobalSlots && !spammers.Empty() {
// Retrieve the next offender if not local address
offender, _ := spammers.Pop()
offenders = append(offenders, offender.(common.Address))
// Equalize balances until all the same or below threshold
if len(offenders) > 1 {
// Calculate the equalization threshold for all current offenders
threshold := pool.pending[offender.(common.Address)].Len()
// Iteratively reduce all offenders until below limit or threshold reached
for pending > pool.config.GlobalSlots && pool.pending[offenders[len(offenders)-2]].Len() > threshold {
for i := 0; i < len(offenders)-1; i++ {
list := pool.pending[offenders[i]]
for _, tx := range list.Cap(list.Len() - 1) {
// Drop the transaction from the global pools too
hash := tx.Hash()
delete(pool.all, hash)
// Update the account nonce to the dropped transaction
if nonce := tx.Nonce(); pool.pendingState.GetNonce(offenders[i].Hash()) > nonce {
pool.pendingState.SetNonce(offenders[i].Hash(), nonce)
}
log.Debug("Removed fairness-exceeding pending transaction", "addr", tx.UserAddress().Hex(), "nonce", tx.Nonce(), "ohash", tx.OrderHash().Hex(), "status", tx.Status(), "orderid", tx.OrderID())
}
pending--
}
}
}
}
// If still above threshold, reduce to limit or min allowance
if pending > pool.config.GlobalSlots && len(offenders) > 0 {
for pending > pool.config.GlobalSlots && uint64(pool.pending[offenders[len(offenders)-1]].Len()) > pool.config.AccountSlots {
for _, addr := range offenders {
list := pool.pending[addr]
for _, tx := range list.Cap(list.Len() - 1) {
// Drop the transaction from the global pools too
hash := tx.Hash()
delete(pool.all, hash)
// Update the account nonce to the dropped transaction
if nonce := tx.Nonce(); pool.pendingState.GetNonce(addr.Hash()) > nonce {
pool.pendingState.SetNonce(addr.Hash(), nonce)
}
log.Debug("Removed fairness-exceeding pending transaction", "addr", tx.UserAddress().Hex(), "nonce", tx.Nonce(), "ohash", tx.OrderHash().Hex(), "status", tx.Status(), "orderid", tx.OrderID())
}
pending--
}
}
}
pendingRateLimitCounter.Inc(int64(pendingBeforeCap - pending))
}
// If we've queued more transactions than the hard limit, drop oldest ones
queued := uint64(0)
for _, list := range pool.queue {
queued += uint64(list.Len())
}
if queued > pool.config.GlobalQueue {
// Sort all accounts with queued transactions by heartbeat
addresses := make(addresssByHeartbeat, 0, len(pool.queue))
for addr := range pool.queue {
if !pool.locals.contains(addr) { // don't drop locals
addresses = append(addresses, addressByHeartbeat{addr, pool.beats[addr]})
}
}
sort.Sort(addresses)
// Drop transactions until the total is below the limit or only locals remain
for drop := queued - pool.config.GlobalQueue; drop > 0 && len(addresses) > 0; {
addr := addresses[len(addresses)-1]
list := pool.queue[addr.address]
addresses = addresses[:len(addresses)-1]
// Drop all transactions if they are less than the overflow