Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

core/txpool: move some validation to outside of mutex #27006

Merged
merged 5 commits into from
Apr 3, 2023
Merged

core/txpool: move some validation to outside of mutex #27006

Show file tree
Hide file tree
Changes from 1 commit
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
300ef9d
core/txpool: move some validation to outside of mutex
holiman Mar 29, 2023
0defec2
Update core/txpool/txpool.go
holiman Mar 29, 2023
acbc02a
Update txpool.go
holiman Mar 29, 2023
e3ce6ca
core/txpool: fix test regression due to changed order of checks
holiman Mar 30, 2023
0ceb08f
core/txpool: drop basics-validation internally
holiman Apr 3, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
84 changes: 48 additions & 36 deletions core/txpool/txpool.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,7 @@ import (
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/params"
"sync/atomic"
)

const (
Expand Down Expand Up @@ -250,14 +251,14 @@ type TxPool struct {
signer types.Signer
mu sync.RWMutex

istanbul bool // Fork indicator whether we are in the istanbul stage.
eip2718 bool // Fork indicator whether we are using EIP-2718 type transactions.
eip1559 bool // Fork indicator whether we are using EIP-1559 type transactions.
shanghai bool // Fork indicator whether we are in the Shanghai stage.
istanbul atomic.Bool // Fork indicator whether we are in the istanbul stage.
eip2718 atomic.Bool // Fork indicator whether we are using EIP-2718 type transactions.
eip1559 atomic.Bool // Fork indicator whether we are using EIP-1559 type transactions.
shanghai atomic.Bool // Fork indicator whether we are in the Shanghai stage.

currentState *state.StateDB // Current state in the blockchain head
pendingNonces *noncer // Pending state tracking virtual nonces
currentMaxGas uint64 // Current gas limit for transaction caps
currentMaxGas atomic.Uint64 // Current gas limit for transaction caps

locals *accountSet // Set of local transaction to exempt from eviction rules
journal *journal // Journal of local transaction to back up to disk
Expand Down Expand Up @@ -592,23 +593,25 @@ func (pool *TxPool) local() map[common.Address]types.Transactions {
return txs
}

// 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 *TxPool) validateTx(tx *types.Transaction, local bool) error {
// validateTxBasics checks whether a transaction is valid according to the consensus
// rules, but does not check state-dependent validation such as sufficient balance.
// This check is meant as an early check which only needs to be performed once,
// and does not require the pool mutex to be held.
func (pool *TxPool) validateTxBasics(tx *types.Transaction, local bool) error {
// Accept only legacy transactions until EIP-2718/2930 activates.
if !pool.eip2718 && tx.Type() != types.LegacyTxType {
if !pool.eip2718.Load() && tx.Type() != types.LegacyTxType {
return core.ErrTxTypeNotSupported
}
// Reject dynamic fee transactions until EIP-1559 activates.
if !pool.eip1559 && tx.Type() == types.DynamicFeeTxType {
if !pool.eip1559.Load() && tx.Type() == types.DynamicFeeTxType {
return core.ErrTxTypeNotSupported
}
// Reject transactions over defined size to prevent DOS attacks
if tx.Size() > txMaxSize {
return ErrOversizedData
}
// Check whether the init code size has been exceeded.
if pool.shanghai && tx.To() == nil && len(tx.Data()) > params.MaxInitCodeSize {
if pool.shanghai.Load() && tx.To() == nil && len(tx.Data()) > params.MaxInitCodeSize {
return fmt.Errorf("%w: code size %v limit %v", core.ErrMaxInitCodeSizeExceeded, len(tx.Data()), params.MaxInitCodeSize)
}
// Transactions can't be negative. This may never happen using RLP decoded
Expand All @@ -617,7 +620,7 @@ func (pool *TxPool) validateTx(tx *types.Transaction, local bool) error {
return ErrNegativeValue
}
// Ensure the transaction doesn't exceed the current block limit gas.
if pool.currentMaxGas < tx.Gas() {
if pool.currentMaxGas.Load() < tx.Gas() {
return ErrGasLimit
}
// Sanity check for extremely large numbers
Expand All @@ -632,14 +635,32 @@ func (pool *TxPool) validateTx(tx *types.Transaction, local bool) error {
return core.ErrTipAboveFeeCap
}
// Make sure the transaction is signed properly.
from, err := types.Sender(pool.signer, tx)
if err != nil {
if _, err := types.Sender(pool.signer, tx); err != nil {
return ErrInvalidSender
}
// Drop non-local transactions under our own minimal accepted gas price or tip
if !local && tx.GasTipCapIntCmp(pool.gasPrice) < 0 {
return ErrUnderpriced
}
// Ensure the transaction has more gas than the basic tx fee.
intrGas, err := core.IntrinsicGas(tx.Data(), tx.AccessList(), tx.To() == nil, true, pool.istanbul.Load(), pool.shanghai.Load())
if err != nil {
return err
}
if tx.Gas() < intrGas {
return core.ErrIntrinsicGas
}
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 *TxPool) validateTx(tx *types.Transaction, local bool) error {
if err := pool.validateTxBasics(tx, local); err != nil {
return err
}
Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

We could skip this check, but that would require a bit of analysis that we don't hit some quirky edgecase due to the pool behavioural changes when a hardfork happens.

Like, we first validateBasics on x before shanghai, accept, then somehow the block with x is dropped, so x is re-added, but now we're past shanghai and the rule about initcode size must be enforced. So now we would add x to pending, but it cannot be added in a block.

If that's the "extent of the damage" then I guess we can drop the check here.

Copy link
Member

@rjl493456442 rjl493456442 Apr 3, 2023 •
edited
Loading

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

honestly I feel this check is unnecessary. I think the check in txpool doesn't need to be very strict.

Like the init-code-size check raised in shanghai, it's totally possible that the "large-code" transactions are accepted before the fork and stay in pool for long time because of low gas price. These transactions will be filtered out in miner.

So another question is: if these transactions are accepted into pool, how can they get evicted? Feel like they will stay until get evicted because of low price.

holiman marked this conversation as resolved.
Show resolved Hide resolved
// Signature has been checked already, this cannot error.
from, _ := types.Sender(pool.signer, tx)
// Ensure the transaction adheres to nonce ordering
if pool.currentState.GetNonce(from) > tx.Nonce() {
return core.ErrNonceTooLow
Expand All @@ -664,15 +685,6 @@ func (pool *TxPool) validateTx(tx *types.Transaction, local bool) error {
return ErrOverdraft
}
}

// Ensure the transaction has more gas than the basic tx fee.
intrGas, err := core.IntrinsicGas(tx.Data(), tx.AccessList(), tx.To() == nil, true, pool.istanbul, pool.shanghai)
if err != nil {
return err
}
if tx.Gas() < intrGas {
return core.ErrIntrinsicGas
}
return nil
}

Expand Down Expand Up @@ -969,12 +981,12 @@ func (pool *TxPool) addTxs(txs []*types.Transaction, local, sync bool) []error {
knownTxMeter.Mark(1)
continue
}
// Exclude transactions with invalid signatures as soon as
// possible and cache senders in transactions before
// obtaining lock
_, err := types.Sender(pool.signer, tx)
if err != nil {
errs[i] = ErrInvalidSender
// Exclude transactions with basic errors, e.g invalid signatures and
// insufficient intrinsic gas as soon as possible and cache senders
// in transactions before obtaining lock

if _, err := pool.validateTxBasics(tx, local); err != nil {
holiman marked this conversation as resolved.
Show resolved Hide resolved
errs[i] = err
invalidTxMeter.Mark(1)
continue
}
Expand Down Expand Up @@ -1364,7 +1376,7 @@ func (pool *TxPool) reset(oldHead, newHead *types.Header) {
}
pool.currentState = statedb
pool.pendingNonces = newNoncer(statedb)
pool.currentMaxGas = newHead.GasLimit
pool.currentMaxGas.Store(newHead.GasLimit)

// Inject any transactions discarded due to reorgs
log.Debug("Reinjecting stale transactions", "count", len(reinject))
Expand All @@ -1373,10 +1385,10 @@ func (pool *TxPool) reset(oldHead, newHead *types.Header) {

// Update all fork indicator by next pending block number.
next := new(big.Int).Add(newHead.Number, big.NewInt(1))
pool.istanbul = pool.chainconfig.IsIstanbul(next)
pool.eip2718 = pool.chainconfig.IsBerlin(next)
pool.eip1559 = pool.chainconfig.IsLondon(next)
pool.shanghai = pool.chainconfig.IsShanghai(uint64(time.Now().Unix()))
pool.istanbul.Store(pool.chainconfig.IsIstanbul(next))
pool.eip2718.Store(pool.chainconfig.IsBerlin(next))
pool.eip1559.Store(pool.chainconfig.IsLondon(next))
pool.shanghai.Store(pool.chainconfig.IsShanghai(uint64(time.Now().Unix())))
}

// promoteExecutables moves transactions that have become processable from the
Expand All @@ -1400,7 +1412,7 @@ func (pool *TxPool) promoteExecutables(accounts []common.Address) []*types.Trans
}
log.Trace("Removed old queued transactions", "count", len(forwards))
// Drop all transactions that are too costly (low balance or out of gas)
drops, _ := list.Filter(pool.currentState.GetBalance(addr), pool.currentMaxGas)
drops, _ := list.Filter(pool.currentState.GetBalance(addr), pool.currentMaxGas.Load())
for _, tx := range drops {
hash := tx.Hash()
pool.all.Remove(hash)
Expand Down Expand Up @@ -1597,7 +1609,7 @@ func (pool *TxPool) demoteUnexecutables() {
log.Trace("Removed old pending transaction", "hash", hash)
}
// Drop all transactions that are too costly (low balance or out of gas), and queue any invalids back for later
drops, invalids := list.Filter(pool.currentState.GetBalance(addr), pool.currentMaxGas)
drops, invalids := list.Filter(pool.currentState.GetBalance(addr), pool.currentMaxGas.Load())
for _, tx := range drops {
hash := tx.Hash()
log.Trace("Removed unpayable pending transaction", "hash", hash)
Expand Down
10 changes: 5 additions & 5 deletions core/txpool/txpool_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1217,22 +1217,22 @@ func TestAllowedTxSize(t *testing.T) {
// All those fields are summed up to at most 213 bytes.
baseSize := uint64(213)
dataSize := txMaxSize - baseSize

maxGas := pool.currentMaxGas.Load()
// Try adding a transaction with maximal allowed size
tx := pricedDataTransaction(0, pool.currentMaxGas, big.NewInt(1), key, dataSize)
tx := pricedDataTransaction(0, maxGas, big.NewInt(1), key, dataSize)
if err := pool.addRemoteSync(tx); err != nil {
t.Fatalf("failed to add transaction of size %d, close to maximal: %v", int(tx.Size()), err)
}
// Try adding a transaction with random allowed size
if err := pool.addRemoteSync(pricedDataTransaction(1, pool.currentMaxGas, big.NewInt(1), key, uint64(rand.Intn(int(dataSize))))); err != nil {
if err := pool.addRemoteSync(pricedDataTransaction(1, maxGas, big.NewInt(1), key, uint64(rand.Intn(int(dataSize))))); err != nil {
t.Fatalf("failed to add transaction of random allowed size: %v", err)
}
// Try adding a transaction of minimal not allowed size
if err := pool.addRemoteSync(pricedDataTransaction(2, pool.currentMaxGas, big.NewInt(1), key, txMaxSize)); err == nil {
if err := pool.addRemoteSync(pricedDataTransaction(2, maxGas, big.NewInt(1), key, txMaxSize)); err == nil {
t.Fatalf("expected rejection on slightly oversize transaction")
}
// Try adding a transaction of random not allowed size
if err := pool.addRemoteSync(pricedDataTransaction(2, pool.currentMaxGas, big.NewInt(1), key, dataSize+1+uint64(rand.Intn(10*txMaxSize)))); err == nil {
if err := pool.addRemoteSync(pricedDataTransaction(2, maxGas, big.NewInt(1), key, dataSize+1+uint64(rand.Intn(10*txMaxSize)))); err == nil {
t.Fatalf("expected rejection on oversize transaction")
}
// Run some sanity checks on the pool internals
Expand Down