EIP-1559: miner changes (#22896)

* core/types, miner: create TxWithMinerFee wrapper, add EIP-1559 support to TransactionsByMinerFeeAndNonce

miner: set base fee when creating a new header, handle gas limit, log miner fees

* all: rename to NewTransactionsByPriceAndNonce

* core/types, miner: rename to NewTransactionsByPriceAndNonce + EffectiveTip

miner: activate 1559 for testGenerateBlockAndImport tests

* core,miner: revert naming to TransactionsByPriceAndTime

* core/types/transaction: update effective tip calculation logic

* miner: update aleut to london

* core/types/transaction_test: use correct signer for 1559 txs + add back sender check

* miner/worker: calculate gas target from gas limit

* core, miner: fix block  gas limits for 1559

Co-authored-by: Ansgar Dietrichs <adietrichs@gmail.com>
Co-authored-by: lightclient@protonmail.com <lightclient@protonmail.com>

Author: 3 people

core/bench_test.go

@@ -112,7 +112,7 @@ func genTxRing(naccounts int) func(int, *BlockGen) {
 	from := 0
 	return func(i int, gen *BlockGen) {
 		block := gen.PrevBlock(i - 1)
-		gas := CalcGasLimit(block, block.GasLimit(), block.GasLimit())
+		gas := block.GasLimit()
 		for {
 			gas -= params.TxGas
 			if gas < params.TxGas {

core/block_validator.go

@@ -106,12 +106,12 @@ func (v *BlockValidator) ValidateState(block *types.Block, statedb *state.StateD
 // to keep the baseline gas above the provided floor, and increase it towards the
 // ceil if the blocks are full. If the ceil is exceeded, it will always decrease
 // the gas allowance.
-func CalcGasLimit(parent *types.Block, gasFloor, gasCeil uint64) uint64 {
+func CalcGasLimit(parentGasUsed, parentGasLimit, gasFloor, gasCeil uint64) uint64 {
 	// contrib = (parentGasUsed * 3 / 2) / 1024
-	contrib := (parent.GasUsed() + parent.GasUsed()/2) / params.GasLimitBoundDivisor
+	contrib := (parentGasUsed + parentGasUsed/2) / params.GasLimitBoundDivisor
 
 	// decay = parentGasLimit / 1024 -1
-	decay := parent.GasLimit()/params.GasLimitBoundDivisor - 1
+	decay := parentGasLimit/params.GasLimitBoundDivisor - 1
 
 	/*
 		strategy: gasLimit of block-to-mine is set based on parent's
@@ -120,21 +120,45 @@ func CalcGasLimit(parent *types.Block, gasFloor, gasCeil uint64) uint64 {
 		at that usage) the amount increased/decreased depends on how far away
 		from parentGasLimit * (2/3) parentGasUsed is.
 	*/
-	limit := parent.GasLimit() - decay + contrib
+	limit := parentGasLimit - decay + contrib
 	if limit < params.MinGasLimit {
 		limit = params.MinGasLimit
 	}
 	// If we're outside our allowed gas range, we try to hone towards them
 	if limit < gasFloor {
-		limit = parent.GasLimit() + decay
+		limit = parentGasLimit + decay
 		if limit > gasFloor {
 			limit = gasFloor
 		}
 	} else if limit > gasCeil {
-		limit = parent.GasLimit() - decay
+		limit = parentGasLimit - decay
 		if limit < gasCeil {
 			limit = gasCeil
 		}
 	}
 	return limit
 }
+
+// CalcGasLimit1559 calculates the next block gas limit under 1559 rules.
+func CalcGasLimit1559(parentGasLimit, desiredLimit uint64) uint64 {
+	delta := parentGasLimit/params.GasLimitBoundDivisor - 1
+	limit := parentGasLimit
+	if desiredLimit < params.MinGasLimit {
+		desiredLimit = params.MinGasLimit
+	}
+	// If we're outside our allowed gas range, we try to hone towards them
+	if limit < desiredLimit {
+		limit = parentGasLimit + delta
+		if limit > desiredLimit {
+			limit = desiredLimit
+		}
+		return limit
+	}
+	if limit > desiredLimit {
+		limit = parentGasLimit - delta
+		if limit < desiredLimit {
+			limit = desiredLimit
+		}
+	}
+	return limit
+}

core/block_validator_test.go

@@ -197,3 +197,36 @@ func testHeaderConcurrentAbortion(t *testing.T, threads int) {
 		t.Errorf("verification count too large: have %d, want below %d", verified, 2*threads)
 	}
 }
+
+func TestCalcGasLimit1559(t *testing.T) {
+
+	for i, tc := range []struct {
+		pGasLimit uint64
+		max       uint64
+		min       uint64
+	}{
+		{20000000, 20019530, 19980470},
+		{40000000, 40039061, 39960939},
+	} {
+		// Increase
+		if have, want := CalcGasLimit1559(tc.pGasLimit, 2*tc.pGasLimit), tc.max; have != want {
+			t.Errorf("test %d: have %d want <%d", i, have, want)
+		}
+		// Decrease
+		if have, want := CalcGasLimit1559(tc.pGasLimit, 0), tc.min; have != want {
+			t.Errorf("test %d: have %d want >%d", i, have, want)
+		}
+		// Small decrease
+		if have, want := CalcGasLimit1559(tc.pGasLimit, tc.pGasLimit-1), tc.pGasLimit-1; have != want {
+			t.Errorf("test %d: have %d want %d", i, have, want)
+		}
+		// Small increase
+		if have, want := CalcGasLimit1559(tc.pGasLimit, tc.pGasLimit+1), tc.pGasLimit+1; have != want {
+			t.Errorf("test %d: have %d want %d", i, have, want)
+		}
+		// No change
+		if have, want := CalcGasLimit1559(tc.pGasLimit, tc.pGasLimit), tc.pGasLimit; have != want {
+			t.Errorf("test %d: have %d want %d", i, have, want)
+		}
+	}
+}

core/chain_makers.go

@@ -263,7 +263,7 @@ func makeHeader(chain consensus.ChainReader, parent *types.Block, state *state.S
 			Difficulty: parent.Difficulty(),
 			UncleHash:  parent.UncleHash(),
 		}),
-		GasLimit: CalcGasLimit(parent, parent.GasLimit(), parent.GasLimit()),
+		GasLimit: parent.GasLimit(),
 		Number:   new(big.Int).Add(parent.Number(), common.Big1),
 		Time:     time,
 	}

core/state_processor_test.go

@@ -223,7 +223,7 @@ func GenerateBadBlock(parent *types.Block, engine consensus.Engine, txs types.Tr
 			Difficulty: parent.Difficulty(),
 			UncleHash:  parent.UncleHash(),
 		}),
-		GasLimit:  CalcGasLimit(parent, parent.GasLimit(), parent.GasLimit()),
+		GasLimit:  parent.GasLimit(),
 		Number:    new(big.Int).Add(parent.Number(), common.Big1),
 		Time:      parent.Time() + 10,
 		UncleHash: types.EmptyUncleHash,

core/types/transaction.go

@@ -36,6 +36,7 @@ var (
 	ErrUnexpectedProtection = errors.New("transaction type does not supported EIP-155 protected signatures")
 	ErrInvalidTxType        = errors.New("transaction type not valid in this context")
 	ErrTxTypeNotSupported   = errors.New("transaction type not supported")
+	ErrFeeCapTooLow         = errors.New("fee cap less than base fee")
 	errEmptyTypedTx         = errors.New("empty typed transaction bytes")
 )
 
@@ -299,6 +300,19 @@ func (tx *Transaction) Cost() *big.Int {
 	return total
 }
 
+// EffectiveTip returns the effective miner tip for the given base fee.
+// Returns error in case of a negative effective miner tip.
+func (tx *Transaction) EffectiveTip(baseFee *big.Int) (*big.Int, error) {
+	if baseFee == nil {
+		return tx.Tip(), nil
+	}
+	feeCap := tx.FeeCap()
+	if feeCap.Cmp(baseFee) == -1 {
+		return nil, ErrFeeCapTooLow
+	}
+	return math.BigMin(tx.Tip(), feeCap.Sub(feeCap, baseFee)), nil
+}
+
 // RawSignatureValues returns the V, R, S signature values of the transaction.
 // The return values should not be modified by the caller.
 func (tx *Transaction) RawSignatureValues() (v, r, s *big.Int) {
@@ -400,24 +414,44 @@ func (s TxByNonce) Len() int           { return len(s) }
 func (s TxByNonce) Less(i, j int) bool { return s[i].Nonce() < s[j].Nonce() }
 func (s TxByNonce) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
 
+// TxWithMinerFee wraps a transaction with its gas price or effective miner tip
+type TxWithMinerFee struct {
+	tx       *Transaction
+	minerFee *big.Int
+}
+
+// NewTxWithMinerFee creates a wrapped transaction, calculating the effective
+// miner tip if a base fee is provided.
+// Returns error in case of a negative effective miner tip.
+func NewTxWithMinerFee(tx *Transaction, baseFee *big.Int) (*TxWithMinerFee, error) {
+	minerFee, err := tx.EffectiveTip(baseFee)
+	if err != nil {
+		return nil, err
+	}
+	return &TxWithMinerFee{
+		tx:       tx,
+		minerFee: minerFee,
+	}, nil
+}
+
 // TxByPriceAndTime implements both the sort and the heap interface, making it useful
 // for all at once sorting as well as individually adding and removing elements.
-type TxByPriceAndTime Transactions
+type TxByPriceAndTime []*TxWithMinerFee
 
 func (s TxByPriceAndTime) Len() int { return len(s) }
 func (s TxByPriceAndTime) Less(i, j int) bool {
 	// If the prices are equal, use the time the transaction was first seen for
 	// deterministic sorting
-	cmp := s[i].GasPrice().Cmp(s[j].GasPrice())
+	cmp := s[i].minerFee.Cmp(s[j].minerFee)
 	if cmp == 0 {
-		return s[i].time.Before(s[j].time)
+		return s[i].tx.time.Before(s[j].tx.time)
 	}
 	return cmp > 0
 }
 func (s TxByPriceAndTime) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
 
 func (s *TxByPriceAndTime) Push(x interface{}) {
-	*s = append(*s, x.(*Transaction))
+	*s = append(*s, x.(*TxWithMinerFee))
 }
 
 func (s *TxByPriceAndTime) Pop() interface{} {
@@ -432,35 +466,39 @@ func (s *TxByPriceAndTime) Pop() interface{} {
 // transactions in a profit-maximizing sorted order, while supporting removing
 // entire batches of transactions for non-executable accounts.
 type TransactionsByPriceAndNonce struct {
-	txs    map[common.Address]Transactions // Per account nonce-sorted list of transactions
-	heads  TxByPriceAndTime                // Next transaction for each unique account (price heap)
-	signer Signer                          // Signer for the set of transactions
+	txs     map[common.Address]Transactions // Per account nonce-sorted list of transactions
+	heads   TxByPriceAndTime                // Next transaction for each unique account (price heap)
+	signer  Signer                          // Signer for the set of transactions
+	baseFee *big.Int                        // Current base fee
 }
 
 // NewTransactionsByPriceAndNonce creates a transaction set that can retrieve
 // price sorted transactions in a nonce-honouring way.
 //
 // Note, the input map is reowned so the caller should not interact any more with
 // if after providing it to the constructor.
-func NewTransactionsByPriceAndNonce(signer Signer, txs map[common.Address]Transactions) *TransactionsByPriceAndNonce {
+func NewTransactionsByPriceAndNonce(signer Signer, txs map[common.Address]Transactions, baseFee *big.Int) *TransactionsByPriceAndNonce {
 	// Initialize a price and received time based heap with the head transactions
 	heads := make(TxByPriceAndTime, 0, len(txs))
 	for from, accTxs := range txs {
-		// Ensure the sender address is from the signer
-		if acc, _ := Sender(signer, accTxs[0]); acc != from {
+		acc, _ := Sender(signer, accTxs[0])
+		wrapped, err := NewTxWithMinerFee(accTxs[0], baseFee)
+		// Remove transaction if sender doesn't match from, or if wrapping fails.
+		if acc != from || err != nil {
 			delete(txs, from)
 			continue
 		}
-		heads = append(heads, accTxs[0])
+		heads = append(heads, wrapped)
 		txs[from] = accTxs[1:]
 	}
 	heap.Init(&heads)
 
 	// Assemble and return the transaction set
 	return &TransactionsByPriceAndNonce{
-		txs:    txs,
-		heads:  heads,
-		signer: signer,
+		txs:     txs,
+		heads:   heads,
+		signer:  signer,
+		baseFee: baseFee,
 	}
 }
 
@@ -469,18 +507,20 @@ func (t *TransactionsByPriceAndNonce) Peek() *Transaction {
 	if len(t.heads) == 0 {
 		return nil
 	}
-	return t.heads[0]
+	return t.heads[0].tx
 }
 
 // Shift replaces the current best head with the next one from the same account.
 func (t *TransactionsByPriceAndNonce) Shift() {
-	acc, _ := Sender(t.signer, t.heads[0])
+	acc, _ := Sender(t.signer, t.heads[0].tx)
 	if txs, ok := t.txs[acc]; ok && len(txs) > 0 {
-		t.heads[0], t.txs[acc] = txs[0], txs[1:]
-		heap.Fix(&t.heads, 0)
-	} else {
-		heap.Pop(&t.heads)
+		if wrapped, err := NewTxWithMinerFee(txs[0], t.baseFee); err == nil {
+			t.heads[0], t.txs[acc] = wrapped, txs[1:]
+			heap.Fix(&t.heads, 0)
+			return
+		}
 	}
+	heap.Pop(&t.heads)
 }
 
 // Pop removes the best transaction, *not* replacing it with the next one from

core/types/transaction_test.go

@@ -22,6 +22,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"math/big"
+	"math/rand"
 	"reflect"
 	"testing"
 	"time"
@@ -258,36 +259,77 @@ func TestRecipientNormal(t *testing.T) {
 	}
 }
 
+func TestTransactionPriceNonceSortLegacy(t *testing.T) {
+	testTransactionPriceNonceSort(t, nil)
+}
+
+func TestTransactionPriceNonceSort1559(t *testing.T) {
+	testTransactionPriceNonceSort(t, big.NewInt(0))
+	testTransactionPriceNonceSort(t, big.NewInt(5))
+	testTransactionPriceNonceSort(t, big.NewInt(50))
+}
+
 // Tests that transactions can be correctly sorted according to their price in
 // decreasing order, but at the same time with increasing nonces when issued by
 // the same account.
-func TestTransactionPriceNonceSort(t *testing.T) {
+func testTransactionPriceNonceSort(t *testing.T, baseFee *big.Int) {
 	// Generate a batch of accounts to start with
 	keys := make([]*ecdsa.PrivateKey, 25)
 	for i := 0; i < len(keys); i++ {
 		keys[i], _ = crypto.GenerateKey()
 	}
-	signer := HomesteadSigner{}
+	signer := LatestSignerForChainID(common.Big1)
 
 	// Generate a batch of transactions with overlapping values, but shifted nonces
 	groups := map[common.Address]Transactions{}
+	expectedCount := 0
 	for start, key := range keys {
 		addr := crypto.PubkeyToAddress(key.PublicKey)
+		count := 25
 		for i := 0; i < 25; i++ {
-			tx, _ := SignTx(NewTransaction(uint64(start+i), common.Address{}, big.NewInt(100), 100, big.NewInt(int64(start+i)), nil), signer, key)
+			var tx *Transaction
+			feeCap := rand.Intn(50)
+			if baseFee == nil {
+				tx = NewTx(&LegacyTx{
+					Nonce:    uint64(start + i),
+					To:       &common.Address{},
+					Value:    big.NewInt(100),
+					Gas:      100,
+					GasPrice: big.NewInt(int64(feeCap)),
+					Data:     nil,
+				})
+			} else {
+				tx = NewTx(&DynamicFeeTx{
+					Nonce:  uint64(start + i),
+					To:     &common.Address{},
+					Value:  big.NewInt(100),
+					Gas:    100,
+					FeeCap: big.NewInt(int64(feeCap)),
+					Tip:    big.NewInt(int64(rand.Intn(feeCap + 1))),
+					Data:   nil,
+				})
+				if count == 25 && int64(feeCap) < baseFee.Int64() {
+					count = i
+				}
+			}
+			tx, err := SignTx(tx, signer, key)
+			if err != nil {
+				t.Fatalf("failed to sign tx: %s", err)
+			}
 			groups[addr] = append(groups[addr], tx)
 		}
+		expectedCount += count
 	}
 	// Sort the transactions and cross check the nonce ordering
-	txset := NewTransactionsByPriceAndNonce(signer, groups)
+	txset := NewTransactionsByPriceAndNonce(signer, groups, baseFee)
 
 	txs := Transactions{}
 	for tx := txset.Peek(); tx != nil; tx = txset.Peek() {
 		txs = append(txs, tx)
 		txset.Shift()
 	}
-	if len(txs) != 25*25 {
-		t.Errorf("expected %d transactions, found %d", 25*25, len(txs))
+	if len(txs) != expectedCount {
+		t.Errorf("expected %d transactions, found %d", expectedCount, len(txs))
 	}
 	for i, txi := range txs {
 		fromi, _ := Sender(signer, txi)
@@ -303,7 +345,12 @@ func TestTransactionPriceNonceSort(t *testing.T) {
 		if i+1 < len(txs) {
 			next := txs[i+1]
 			fromNext, _ := Sender(signer, next)
-			if fromi != fromNext && txi.GasPrice().Cmp(next.GasPrice()) < 0 {
+			tip, err := txi.EffectiveTip(baseFee)
+			nextTip, nextErr := next.EffectiveTip(baseFee)
+			if err != nil || nextErr != nil {
+				t.Errorf("error calculating effective tip")
+			}
+			if fromi != fromNext && tip.Cmp(nextTip) < 0 {
 				t.Errorf("invalid gasprice ordering: tx #%d (A=%x P=%v) < tx #%d (A=%x P=%v)", i, fromi[:4], txi.GasPrice(), i+1, fromNext[:4], next.GasPrice())
 			}
 		}
@@ -331,7 +378,7 @@ func TestTransactionTimeSort(t *testing.T) {
 		groups[addr] = append(groups[addr], tx)
 	}
 	// Sort the transactions and cross check the nonce ordering
-	txset := NewTransactionsByPriceAndNonce(signer, groups)
+	txset := NewTransactionsByPriceAndNonce(signer, groups, nil)
 
 	txs := Transactions{}
 	for tx := txset.Peek(); tx != nil; tx = txset.Peek() {