eth, miner: fix enforcing the minimum miner tip (#28933)

* eth, miner: fix enforcing the minimum miner tip

* ethclient/simulated: fix failing test due the min tip change

* accounts/abi/bind: fix simulater gas tip issue

Author: karalabe

accounts/abi/bind/util_test.go

@@ -65,7 +65,7 @@ func TestWaitDeployed(t *testing.T) {
 
 		// Create the transaction
 		head, _ := backend.Client().HeaderByNumber(context.Background(), nil) // Should be child's, good enough
-		gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))
+		gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(params.GWei))
 
 		tx := types.NewContractCreation(0, big.NewInt(0), test.gas, gasPrice, common.FromHex(test.code))
 		tx, _ = types.SignTx(tx, types.LatestSignerForChainID(big.NewInt(1337)), testKey)

eth/api_miner.go

@@ -64,6 +64,7 @@ func (api *MinerAPI) SetGasPrice(gasPrice hexutil.Big) bool {
 	api.e.lock.Unlock()
 
 	api.e.txPool.SetGasTip((*big.Int)(&gasPrice))
+	api.e.Miner().SetGasTip((*big.Int)(&gasPrice))
 	return true
 }
 

ethclient/simulated/backend_test.go

@@ -52,7 +52,7 @@ func newTx(sim *Backend, key *ecdsa.PrivateKey) (*types.Transaction, error) {
 
 	// create a signed transaction to send
 	head, _ := client.HeaderByNumber(context.Background(), nil) // Should be child's, good enough
-	gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(1))
+	gasPrice := new(big.Int).Add(head.BaseFee, big.NewInt(params.GWei))
 	addr := crypto.PubkeyToAddress(key.PublicKey)
 	chainid, _ := client.ChainID(context.Background())
 	nonce, err := client.PendingNonceAt(context.Background(), addr)
@@ -62,7 +62,7 @@ func newTx(sim *Backend, key *ecdsa.PrivateKey) (*types.Transaction, error) {
 	tx := types.NewTx(&types.DynamicFeeTx{
 		ChainID:   chainid,
 		Nonce:     nonce,
-		GasTipCap: big.NewInt(1),
+		GasTipCap: big.NewInt(params.GWei),
 		GasFeeCap: gasPrice,
 		Gas:       21000,
 		To:        &addr,

ethclient/simulated/options.go

@@ -17,6 +17,8 @@
 package simulated
 
 import (
+	"math/big"
+
 	"github.com/ethereum/go-ethereum/eth/ethconfig"
 	"github.com/ethereum/go-ethereum/node"
 )
@@ -37,3 +39,17 @@ func WithCallGasLimit(gaslimit uint64) func(nodeConf *node.Config, ethConf *ethc
 		ethConf.RPCGasCap = gaslimit
 	}
 }
+
+// WithMinerMinTip configures the simulated backend to require a specific minimum
+// gas tip for a transaction to be included.
+//
+// 0 is not possible as a live Geth node would reject that due to DoS protection,
+// so the simulated backend will replicate that behavior for consisntency.
+func WithMinerMinTip(tip *big.Int) func(nodeConf *node.Config, ethConf *ethconfig.Config) {
+	if tip == nil || tip.Cmp(new(big.Int)) <= 0 {
+		panic("invalid miner minimum tip")
+	}
+	return func(nodeConf *node.Config, ethConf *ethconfig.Config) {
+		ethConf.Miner.GasPrice = tip
+	}
+}

miner/miner.go

@@ -197,6 +197,11 @@ func (miner *Miner) SetExtra(extra []byte) error {
 	return nil
 }
 
+func (miner *Miner) SetGasTip(tip *big.Int) error {
+	miner.worker.setGasTip(tip)
+	return nil
+}
+
 // SetRecommitInterval sets the interval for sealing work resubmitting.
 func (miner *Miner) SetRecommitInterval(interval time.Duration) {
 	miner.worker.setRecommitInterval(interval)

miner/ordering.go

@@ -119,11 +119,11 @@ func newTransactionsByPriceAndNonce(signer types.Signer, txs map[common.Address]
 }
 
 // Peek returns the next transaction by price.
-func (t *transactionsByPriceAndNonce) Peek() *txpool.LazyTransaction {
+func (t *transactionsByPriceAndNonce) Peek() (*txpool.LazyTransaction, *big.Int) {
 	if len(t.heads) == 0 {
-		return nil
+		return nil, nil
 	}
-	return t.heads[0].tx
+	return t.heads[0].tx, t.heads[0].fees
 }
 
 // Shift replaces the current best head with the next one from the same account.

miner/ordering_test.go

@@ -104,7 +104,7 @@ func testTransactionPriceNonceSort(t *testing.T, baseFee *big.Int) {
 	txset := newTransactionsByPriceAndNonce(signer, groups, baseFee)
 
 	txs := types.Transactions{}
-	for tx := txset.Peek(); tx != nil; tx = txset.Peek() {
+	for tx, _ := txset.Peek(); tx != nil; tx, _ = txset.Peek() {
 		txs = append(txs, tx.Tx)
 		txset.Shift()
 	}
@@ -170,7 +170,7 @@ func TestTransactionTimeSort(t *testing.T) {
 	txset := newTransactionsByPriceAndNonce(signer, groups, nil)
 
 	txs := types.Transactions{}
-	for tx := txset.Peek(); tx != nil; tx = txset.Peek() {
+	for tx, _ := txset.Peek(); tx != nil; tx, _ = txset.Peek() {
 		txs = append(txs, tx.Tx)
 		txset.Shift()
 	}

miner/worker.go

@@ -205,6 +205,7 @@ type worker struct {
 	mu       sync.RWMutex // The lock used to protect the coinbase and extra fields
 	coinbase common.Address
 	extra    []byte
+	tip      *big.Int // Minimum tip needed for non-local transaction to include them
 
 	pendingMu    sync.RWMutex
 	pendingTasks map[common.Hash]*task
@@ -251,6 +252,7 @@ func newWorker(config *Config, chainConfig *params.ChainConfig, engine consensus
 		isLocalBlock:       isLocalBlock,
 		coinbase:           config.Etherbase,
 		extra:              config.ExtraData,
+		tip:                config.GasPrice,
 		pendingTasks:       make(map[common.Hash]*task),
 		txsCh:              make(chan core.NewTxsEvent, txChanSize),
 		chainHeadCh:        make(chan core.ChainHeadEvent, chainHeadChanSize),
@@ -327,6 +329,13 @@ func (w *worker) setExtra(extra []byte) {
 	w.extra = extra
 }
 
+// setGasTip sets the minimum miner tip needed to include a non-local transaction.
+func (w *worker) setGasTip(tip *big.Int) {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	w.tip = tip
+}
+
 // setRecommitInterval updates the interval for miner sealing work recommitting.
 func (w *worker) setRecommitInterval(interval time.Duration) {
 	select {
@@ -554,7 +563,7 @@ func (w *worker) mainLoop() {
 				}
 				txset := newTransactionsByPriceAndNonce(w.current.signer, txs, w.current.header.BaseFee)
 				tcount := w.current.tcount
-				w.commitTransactions(w.current, txset, nil)
+				w.commitTransactions(w.current, txset, nil, new(big.Int))
 
 				// Only update the snapshot if any new transactions were added
 				// to the pending block
@@ -792,7 +801,7 @@ func (w *worker) applyTransaction(env *environment, tx *types.Transaction) (*typ
 	return receipt, err
 }
 
-func (w *worker) commitTransactions(env *environment, txs *transactionsByPriceAndNonce, interrupt *atomic.Int32) error {
+func (w *worker) commitTransactions(env *environment, txs *transactionsByPriceAndNonce, interrupt *atomic.Int32, minTip *big.Int) error {
 	gasLimit := env.header.GasLimit
 	if env.gasPool == nil {
 		env.gasPool = new(core.GasPool).AddGas(gasLimit)
@@ -812,7 +821,7 @@ func (w *worker) commitTransactions(env *environment, txs *transactionsByPriceAn
 			break
 		}
 		// Retrieve the next transaction and abort if all done.
-		ltx := txs.Peek()
+		ltx, tip := txs.Peek()
 		if ltx == nil {
 			break
 		}
@@ -827,6 +836,11 @@ func (w *worker) commitTransactions(env *environment, txs *transactionsByPriceAn
 			txs.Pop()
 			continue
 		}
+		// If we don't receive enough tip for the next transaction, skip the account
+		if tip.Cmp(minTip) < 0 {
+			log.Trace("Not enough tip for transaction", "hash", ltx.Hash, "tip", tip, "needed", minTip)
+			break // If the next-best is too low, surely no better will be available
+		}
 		// Transaction seems to fit, pull it up from the pool
 		tx := ltx.Resolve()
 		if tx == nil {
@@ -997,15 +1011,19 @@ func (w *worker) fillTransactions(interrupt *atomic.Int32, env *environment) err
 	}
 
 	// Fill the block with all available pending transactions.
+	w.mu.RLock()
+	tip := w.tip
+	w.mu.RUnlock()
+
 	if len(localTxs) > 0 {
 		txs := newTransactionsByPriceAndNonce(env.signer, localTxs, env.header.BaseFee)
-		if err := w.commitTransactions(env, txs, interrupt); err != nil {
+		if err := w.commitTransactions(env, txs, interrupt, new(big.Int)); err != nil {
 			return err
 		}
 	}
 	if len(remoteTxs) > 0 {
 		txs := newTransactionsByPriceAndNonce(env.signer, remoteTxs, env.header.BaseFee)
-		if err := w.commitTransactions(env, txs, interrupt); err != nil {
+		if err := w.commitTransactions(env, txs, interrupt, tip); err != nil {
 			return err
 		}
 	}