core, eth, miner: start propagating and consuming blob txs (#28243)

* core, eth, miner: start propagating and consuming blob txs

* eth/protocols/eth: disable eth/67 if Cancun is enabled

* core/txpool, eth, miner: pass gas limit infos in lazy tx for mienr filtering

* core/txpool, miner: add lazy resolver for pending txs too

* core, eth: fix review noticed bugs

* eth, miner: minor polishes in the mining and announcing logs

* core/expool: unsubscribe the event scope

core/txpool/blobpool/blobpool.go

@@ -97,6 +97,8 @@ type blobTxMeta struct {
 	execTipCap *uint256.Int // Needed to prioritize inclusion order across accounts and validate replacement price bump
 	execFeeCap *uint256.Int // Needed to validate replacement price bump
 	blobFeeCap *uint256.Int // Needed to validate replacement price bump
+	execGas    uint64       // Needed to check inclusion validity before reading the blob
+	blobGas    uint64       // Needed to check inclusion validity before reading the blob
 
 	basefeeJumps float64 // Absolute number of 1559 fee adjustments needed to reach the tx's fee cap
 	blobfeeJumps float64 // Absolute number of 4844 fee adjustments needed to reach the tx's blob fee cap
@@ -118,6 +120,8 @@ func newBlobTxMeta(id uint64, size uint32, tx *types.Transaction) *blobTxMeta {
 		execTipCap: uint256.MustFromBig(tx.GasTipCap()),
 		execFeeCap: uint256.MustFromBig(tx.GasFeeCap()),
 		blobFeeCap: uint256.MustFromBig(tx.BlobGasFeeCap()),
+		execGas:    tx.Gas(),
+		blobGas:    tx.BlobGas(),
 	}
 	meta.basefeeJumps = dynamicFeeJumps(meta.execFeeCap)
 	meta.blobfeeJumps = dynamicFeeJumps(meta.blobFeeCap)
@@ -307,8 +311,8 @@ type BlobPool struct {
 	spent  map[common.Address]*uint256.Int  // Expenditure tracking for individual accounts
 	evict  *evictHeap                       // Heap of cheapest accounts for eviction when full
 
-	eventFeed  event.Feed              // Event feed to send out new tx events on pool inclusion
-	eventScope event.SubscriptionScope // Event scope to track and mass unsubscribe on termination
+	discoverFeed event.Feed // Event feed to send out new tx events on pool discovery (reorg excluded)
+	insertFeed   event.Feed // Event feed to send out new tx events on pool inclusion (reorg included)
 
 	lock sync.RWMutex // Mutex protecting the pool during reorg handling
 }
@@ -436,8 +440,6 @@ func (p *BlobPool) Close() error {
 	if err := p.store.Close(); err != nil {
 		errs = append(errs, err)
 	}
-	p.eventScope.Close()
-
 	switch {
 	case errs == nil:
 		return nil
@@ -758,15 +760,21 @@ func (p *BlobPool) Reset(oldHead, newHead *types.Header) {
 	// Run the reorg between the old and new head and figure out which accounts
 	// need to be rechecked and which transactions need to be readded
 	if reinject, inclusions := p.reorg(oldHead, newHead); reinject != nil {
+		var adds []*types.Transaction
 		for addr, txs := range reinject {
 			// Blindly push all the lost transactions back into the pool
 			for _, tx := range txs {
-				p.reinject(addr, tx.Hash())
+				if err := p.reinject(addr, tx.Hash()); err == nil {
+					adds = append(adds, tx.WithoutBlobTxSidecar())
+				}
 			}
 			// Recheck the account's pooled transactions to drop included and
 			// invalidated one
 			p.recheck(addr, inclusions)
 		}
+		if len(adds) > 0 {
+			p.insertFeed.Send(core.NewTxsEvent{Txs: adds})
+		}
 	}
 	// Flush out any blobs from limbo that are older than the latest finality
 	if p.chain.Config().IsCancun(p.head.Number, p.head.Time) {
@@ -921,13 +929,13 @@ func (p *BlobPool) reorg(oldHead, newHead *types.Header) (map[common.Address][]*
 // Note, the method will not initialize the eviction cache values as those will
 // be done once for all transactions belonging to an account after all individual
 // transactions are injected back into the pool.
-func (p *BlobPool) reinject(addr common.Address, txhash common.Hash) {
+func (p *BlobPool) reinject(addr common.Address, txhash common.Hash) error {
 	// Retrieve the associated blob from the limbo. Without the blobs, we cannot
 	// add the transaction back into the pool as it is not mineable.
 	tx, err := p.limbo.pull(txhash)
 	if err != nil {
 		log.Error("Blobs unavailable, dropping reorged tx", "err", err)
-		return
+		return err
 	}
 	// TODO: seems like an easy optimization here would be getting the serialized tx
 	// from limbo instead of re-serializing it here.
@@ -936,20 +944,20 @@ func (p *BlobPool) reinject(addr common.Address, txhash common.Hash) {
 	blob, err := rlp.EncodeToBytes(tx)
 	if err != nil {
 		log.Error("Failed to encode transaction for storage", "hash", tx.Hash(), "err", err)
-		return
+		return err
 	}
 	id, err := p.store.Put(blob)
 	if err != nil {
 		log.Error("Failed to write transaction into storage", "hash", tx.Hash(), "err", err)
-		return
+		return err
 	}
 
 	// Update the indixes and metrics
 	meta := newBlobTxMeta(id, p.store.Size(id), tx)
 	if _, ok := p.index[addr]; !ok {
 		if err := p.reserve(addr, true); err != nil {
 			log.Warn("Failed to reserve account for blob pool", "tx", tx.Hash(), "from", addr, "err", err)
-			return
+			return err
 		}
 		p.index[addr] = []*blobTxMeta{meta}
 		p.spent[addr] = meta.costCap
@@ -960,6 +968,7 @@ func (p *BlobPool) reinject(addr common.Address, txhash common.Hash) {
 	}
 	p.lookup[meta.hash] = meta.id
 	p.stored += uint64(meta.size)
+	return nil
 }
 
 // SetGasTip implements txpool.SubPool, allowing the blob pool's gas requirements
@@ -1154,9 +1163,19 @@ func (p *BlobPool) Get(hash common.Hash) *types.Transaction {
 // Add inserts a set of blob transactions into the pool if they pass validation (both
 // consensus validity and pool restictions).
 func (p *BlobPool) Add(txs []*types.Transaction, local bool, sync bool) []error {
-	errs := make([]error, len(txs))
+	var (
+		adds = make([]*types.Transaction, 0, len(txs))
+		errs = make([]error, len(txs))
+	)
 	for i, tx := range txs {
 		errs[i] = p.add(tx)
+		if errs[i] == nil {
+			adds = append(adds, tx.WithoutBlobTxSidecar())
+		}
+	}
+	if len(adds) > 0 {
+		p.discoverFeed.Send(core.NewTxsEvent{Txs: adds})
+		p.insertFeed.Send(core.NewTxsEvent{Txs: adds})
 	}
 	return errs
 }
@@ -1384,6 +1403,8 @@ func (p *BlobPool) Pending(enforceTips bool) map[common.Address][]*txpool.LazyTr
 				Time:      time.Now(), // TODO(karalabe): Maybe save these and use that?
 				GasFeeCap: tx.execFeeCap.ToBig(),
 				GasTipCap: tx.execTipCap.ToBig(),
+				Gas:       tx.execGas,
+				BlobGas:   tx.blobGas,
 			})
 		}
 		if len(lazies) > 0 {
@@ -1468,10 +1489,14 @@ func (p *BlobPool) updateLimboMetrics() {
 	limboSlotusedGauge.Update(int64(slotused))
 }
 
-// SubscribeTransactions registers a subscription of NewTxsEvent and
-// starts sending event to the given channel.
-func (p *BlobPool) SubscribeTransactions(ch chan<- core.NewTxsEvent) event.Subscription {
-	return p.eventScope.Track(p.eventFeed.Subscribe(ch))
+// SubscribeTransactions registers a subscription for new transaction events,
+// supporting feeding only newly seen or also resurrected transactions.
+func (p *BlobPool) SubscribeTransactions(ch chan<- core.NewTxsEvent, reorgs bool) event.Subscription {
+	if reorgs {
+		return p.insertFeed.Subscribe(ch)
+	} else {
+		return p.discoverFeed.Subscribe(ch)
+	}
 }
 
 // Nonce returns the next nonce of an account, with all transactions executable

core/txpool/legacypool/legacypool.go

@@ -208,7 +208,6 @@ type LegacyPool struct {
 	chain       BlockChain
 	gasTip      atomic.Pointer[big.Int]
 	txFeed      event.Feed
-	scope       event.SubscriptionScope
 	signer      types.Signer
 	mu          sync.RWMutex
 
@@ -404,9 +403,6 @@ func (pool *LegacyPool) loop() {
 
 // Close terminates the transaction pool.
 func (pool *LegacyPool) Close() error {
-	// Unsubscribe all subscriptions registered from txpool
-	pool.scope.Close()
-
 	// Terminate the pool reorger and return
 	close(pool.reorgShutdownCh)
 	pool.wg.Wait()
@@ -425,10 +421,14 @@ func (pool *LegacyPool) Reset(oldHead, newHead *types.Header) {
 	<-wait
 }
 
-// SubscribeTransactions registers a subscription of NewTxsEvent and
-// starts sending event to the given channel.
-func (pool *LegacyPool) SubscribeTransactions(ch chan<- core.NewTxsEvent) event.Subscription {
-	return pool.scope.Track(pool.txFeed.Subscribe(ch))
+// SubscribeTransactions registers a subscription for new transaction events,
+// supporting feeding only newly seen or also resurrected transactions.
+func (pool *LegacyPool) SubscribeTransactions(ch chan<- core.NewTxsEvent, reorgs bool) event.Subscription {
+	// The legacy pool has a very messed up internal shuffling, so it's kind of
+	// hard to separate newly discovered transaction from resurrected ones. This
+	// is because the new txs are added to the queue, resurrected ones too and
+	// reorgs run lazily, so separating the two would need a marker.
+	return pool.txFeed.Subscribe(ch)
 }
 
 // SetGasTip updates the minimum gas tip required by the transaction pool for a
@@ -552,6 +552,8 @@ func (pool *LegacyPool) Pending(enforceTips bool) map[common.Address][]*txpool.L
 					Time:      txs[i].Time(),
 					GasFeeCap: txs[i].GasFeeCap(),
 					GasTipCap: txs[i].GasTipCap(),
+					Gas:       txs[i].Gas(),
+					BlobGas:   txs[i].BlobGas(),
 				}
 			}
 			pending[addr] = lazies

core/txpool/subpool.go

@@ -30,13 +30,16 @@ import (
 // enough for the miner and other APIs to handle large batches of transactions;
 // and supports pulling up the entire transaction when really needed.
 type LazyTransaction struct {
-	Pool SubPool            // Transaction subpool to pull the real transaction up
+	Pool LazyResolver       // Transaction resolver to pull the real transaction up
 	Hash common.Hash        // Transaction hash to pull up if needed
 	Tx   *types.Transaction // Transaction if already resolved
 
 	Time      time.Time // Time when the transaction was first seen
 	GasFeeCap *big.Int  // Maximum fee per gas the transaction may consume
 	GasTipCap *big.Int  // Maximum miner tip per gas the transaction can pay
+
+	Gas     uint64 // Amount of gas required by the transaction
+	BlobGas uint64 // Amount of blob gas required by the transaction
 }
 
 // Resolve retrieves the full transaction belonging to a lazy handle if it is still
@@ -48,6 +51,14 @@ func (ltx *LazyTransaction) Resolve() *types.Transaction {
 	return ltx.Tx
 }
 
+// LazyResolver is a minimal interface needed for a transaction pool to satisfy
+// resolving lazy transactions. It's mostly a helper to avoid the entire sub-
+// pool being injected into the lazy transaction.
+type LazyResolver interface {
+	// Get returns a transaction if it is contained in the pool, or nil otherwise.
+	Get(hash common.Hash) *types.Transaction
+}
+
 // AddressReserver is passed by the main transaction pool to subpools, so they
 // may request (and relinquish) exclusive access to certain addresses.
 type AddressReserver func(addr common.Address, reserve bool) error
@@ -99,8 +110,10 @@ type SubPool interface {
 	// account and sorted by nonce.
 	Pending(enforceTips bool) map[common.Address][]*LazyTransaction
 
-	// SubscribeTransactions subscribes to new transaction events.
-	SubscribeTransactions(ch chan<- core.NewTxsEvent) event.Subscription
+	// SubscribeTransactions subscribes to new transaction events. The subscriber
+	// can decide whether to receive notifications only for newly seen transactions
+	// or also for reorged out ones.
+	SubscribeTransactions(ch chan<- core.NewTxsEvent, reorgs bool) event.Subscription
 
 	// Nonce returns the next nonce of an account, with all transactions executable
 	// by the pool already applied on top.

core/txpool/txpool.go

@@ -155,13 +155,15 @@ func (p *TxPool) Close() error {
 	if err := <-errc; err != nil {
 		errs = append(errs, err)
 	}
-
 	// Terminate each subpool
 	for _, subpool := range p.subpools {
 		if err := subpool.Close(); err != nil {
 			errs = append(errs, err)
 		}
 	}
+	// Unsubscribe anyone still listening for tx events
+	p.subs.Close()
+
 	if len(errs) > 0 {
 		return fmt.Errorf("subpool close errors: %v", errs)
 	}
@@ -316,12 +318,12 @@ func (p *TxPool) Pending(enforceTips bool) map[common.Address][]*LazyTransaction
 	return txs
 }
 
-// SubscribeNewTxsEvent registers a subscription of NewTxsEvent and starts sending
-// events to the given channel.
-func (p *TxPool) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription {
+// SubscribeTransactions registers a subscription for new transaction events,
+// supporting feeding only newly seen or also resurrected transactions.
+func (p *TxPool) SubscribeTransactions(ch chan<- core.NewTxsEvent, reorgs bool) event.Subscription {
 	subs := make([]event.Subscription, len(p.subpools))
 	for i, subpool := range p.subpools {
-		subs[i] = subpool.SubscribeTransactions(ch)
+		subs[i] = subpool.SubscribeTransactions(ch, reorgs)
 	}
 	return p.subs.Track(event.JoinSubscriptions(subs...))
 }

eth/api_backend.go

@@ -334,7 +334,7 @@ func (b *EthAPIBackend) TxPool() *txpool.TxPool {
 }
 
 func (b *EthAPIBackend) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription {
-	return b.eth.txPool.SubscribeNewTxsEvent(ch)
+	return b.eth.txPool.SubscribeTransactions(ch, true)
 }
 
 func (b *EthAPIBackend) SyncProgress() ethereum.SyncProgress {

eth/catalyst/simulated_beacon.go

@@ -199,7 +199,7 @@ func (c *SimulatedBeacon) sealBlock(withdrawals []*types.Withdrawal) error {
 func (c *SimulatedBeacon) loopOnDemand() {
 	var (
 		newTxs = make(chan core.NewTxsEvent)
-		sub    = c.eth.TxPool().SubscribeNewTxsEvent(newTxs)
+		sub    = c.eth.TxPool().SubscribeTransactions(newTxs, true)
 	)
 	defer sub.Unsubscribe()
 

eth/handler.go

@@ -75,9 +75,10 @@ type txPool interface {
 	// The slice should be modifiable by the caller.
 	Pending(enforceTips bool) map[common.Address][]*txpool.LazyTransaction
 
-	// SubscribeNewTxsEvent should return an event subscription of
-	// NewTxsEvent and send events to the given channel.
-	SubscribeNewTxsEvent(chan<- core.NewTxsEvent) event.Subscription
+	// SubscribeTransactions subscribes to new transaction events. The subscriber
+	// can decide whether to receive notifications only for newly seen transactions
+	// or also for reorged out ones.
+	SubscribeTransactions(ch chan<- core.NewTxsEvent, reorgs bool) event.Subscription
 }
 
 // handlerConfig is the collection of initialization parameters to create a full
@@ -509,10 +510,10 @@ func (h *handler) unregisterPeer(id string) {
 func (h *handler) Start(maxPeers int) {
 	h.maxPeers = maxPeers
 
-	// broadcast transactions
+	// broadcast and announce transactions (only new ones, not resurrected ones)
 	h.wg.Add(1)
 	h.txsCh = make(chan core.NewTxsEvent, txChanSize)
-	h.txsSub = h.txpool.SubscribeNewTxsEvent(h.txsCh)
+	h.txsSub = h.txpool.SubscribeTransactions(h.txsCh, false)
 	go h.txBroadcastLoop()
 
 	// broadcast mined blocks
@@ -592,26 +593,33 @@ func (h *handler) BroadcastBlock(block *types.Block, propagate bool) {
 }
 
 // BroadcastTransactions will propagate a batch of transactions
-// - To a square root of all peers
+// - To a square root of all peers for non-blob transactions
 // - And, separately, as announcements to all peers which are not known to
 // already have the given transaction.
 func (h *handler) BroadcastTransactions(txs types.Transactions) {
 	var (
-		annoCount   int // Count of announcements made
-		annoPeers   int
-		directCount int // Count of the txs sent directly to peers
-		directPeers int // Count of the peers that were sent transactions directly
+		blobTxs  int // Number of blob transactions to announce only
+		largeTxs int // Number of large transactions to announce only
+
+		directCount int // Number of transactions sent directly to peers (duplicates included)
+		directPeers int // Number of peers that were sent transactions directly
+		annCount    int // Number of transactions announced across all peers (duplicates included)
+		annPeers    int // Number of peers announced about transactions
 
 		txset = make(map[*ethPeer][]common.Hash) // Set peer->hash to transfer directly
 		annos = make(map[*ethPeer][]common.Hash) // Set peer->hash to announce
-
 	)
 	// Broadcast transactions to a batch of peers not knowing about it
 	for _, tx := range txs {
 		peers := h.peers.peersWithoutTransaction(tx.Hash())
 
 		var numDirect int
-		if tx.Size() <= txMaxBroadcastSize {
+		switch {
+		case tx.Type() == types.BlobTxType:
+			blobTxs++
+		case tx.Size() > txMaxBroadcastSize:
+			largeTxs++
+		default:
 			numDirect = int(math.Sqrt(float64(len(peers))))
 		}
 		// Send the tx unconditionally to a subset of our peers
@@ -629,13 +637,12 @@ func (h *handler) BroadcastTransactions(txs types.Transactions) {
 		peer.AsyncSendTransactions(hashes)
 	}
 	for peer, hashes := range annos {
-		annoPeers++
-		annoCount += len(hashes)
+		annPeers++
+		annCount += len(hashes)
 		peer.AsyncSendPooledTransactionHashes(hashes)
 	}
-	log.Debug("Transaction broadcast", "txs", len(txs),
-		"announce packs", annoPeers, "announced hashes", annoCount,
-		"tx packs", directPeers, "broadcast txs", directCount)
+	log.Debug("Distributed transactions", "plaintxs", len(txs)-blobTxs-largeTxs, "blobtxs", blobTxs, "largetxs", largeTxs,
+		"bcastpeers", directPeers, "bcastcount", directCount, "annpeers", annPeers, "anncount", annCount)
 }
 
 // minedBroadcastLoop sends mined blocks to connected peers.