update statedb

add transient storage

journal.go

@@ -122,6 +122,12 @@ type (
 		address *common.Address
 		slot    *common.Hash
 	}
+
+	// Changes to the transient storage
+	transientStorageChange struct {
+		account       *common.Address
+		key, prevalue common.Hash
+	}
 )
 
 func (ch createObjectChange) revert(s *StateDB) {
@@ -194,6 +200,14 @@ func (ch storageChange) dirtied() *common.Address {
 	return ch.account
 }
 
+func (ch transientStorageChange) revert(s *StateDB) {
+	s.setTransientState(*ch.account, ch.key, ch.prevalue)
+}
+
+func (ch transientStorageChange) dirtied() *common.Address {
+	return nil
+}
+
 func (ch refundChange) revert(s *StateDB) {
 	s.refund = ch.prev
 }

statedb.go

@@ -11,6 +11,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/metrics"
+	"github.com/ethereum/go-ethereum/params"
 )
 
 /*
@@ -77,6 +78,9 @@ type StateDB struct {
 	// Per-transaction access list
 	accessList *accessList
 
+	// Transient storage
+	transientStorage transientStorage
+
 	// Journal of state modifications. This is the backbone of
 	// Snapshot and RevertToSnapshot.
 	journal        *journal
@@ -100,6 +104,7 @@ func New(blockHash common.Hash, db StateDatabase) (*StateDB, error) {
 		preimages:           make(map[common.Hash][]byte),
 		journal:             newJournal(),
 		accessList:          newAccessList(),
+		transientStorage:    newTransientStorage(),
 		hasher:              crypto.NewKeccakState(),
 	}
 	return sdb, nil
@@ -307,6 +312,33 @@ func (s *StateDB) Suicide(addr common.Address) bool {
 	return true
 }
 
+// SetTransientState sets transient storage for a given account. It
+// adds the change to the journal so that it can be rolled back
+// to its previous value if there is a revert.
+func (s *StateDB) SetTransientState(addr common.Address, key, value common.Hash) {
+	prev := s.GetTransientState(addr, key)
+	if prev == value {
+		return
+	}
+	s.journal.append(transientStorageChange{
+		account:  &addr,
+		key:      key,
+		prevalue: prev,
+	})
+	s.setTransientState(addr, key, value)
+}
+
+// setTransientState is a lower level setter for transient storage. It
+// is called during a revert to prevent modifications to the journal.
+func (s *StateDB) setTransientState(addr common.Address, key, value common.Hash) {
+	s.transientStorage.Set(addr, key, value)
+}
+
+// GetTransientState gets transient storage for a given account.
+func (s *StateDB) GetTransientState(addr common.Address, key common.Hash) common.Hash {
+	return s.transientStorage.Get(addr, key)
+}
+
 //
 // Setting, updating & deleting state object methods.
 //
@@ -389,8 +421,8 @@ func (s *StateDB) createObject(addr common.Address) (newobj, prev *stateObject)
 // CreateAccount is called during the EVM CREATE operation. The situation might arise that
 // a contract does the following:
 //
-//   1. sends funds to sha(account ++ (nonce + 1))
+//  1. sends funds to sha(account ++ (nonce + 1))
-//   2. tx_create(sha(account ++ nonce)) (note that this gets the address of 1)
+//  2. tx_create(sha(account ++ nonce)) (note that this gets the address of 1)
 //
 // Carrying over the balance ensures that Ether doesn't disappear.
 func (s *StateDB) CreateAccount(addr common.Address) {
@@ -437,33 +469,45 @@ func (s *StateDB) GetRefund() uint64 {
 	return s.refund
 }
 
-// PrepareAccessList handles the preparatory steps for executing a state transition with
+// Prepare handles the preparatory steps for executing a state transition with.
-// regards to both EIP-2929 and EIP-2930:
+// This method must be invoked before state transition.
 //
+// Berlin fork:
 // - Add sender to access list (2929)
 // - Add destination to access list (2929)
 // - Add precompiles to access list (2929)
 // - Add the contents of the optional tx access list (2930)
 //
-// This method should only be called if Berlin/2929+2930 is applicable at the current number.
+// Potential EIPs:
-func (s *StateDB) PrepareAccessList(sender common.Address, dst *common.Address, precompiles []common.Address, list types.AccessList) {
+// - Reset access list (Berlin)
-	// Clear out any leftover from previous executions
+// - Add coinbase to access list (EIP-3651)
-	s.accessList = newAccessList()
+// - Reset transient storage (EIP-1153)
+func (s *StateDB) Prepare(rules params.Rules, sender, coinbase common.Address, dst *common.Address, precompiles []common.Address, list types.AccessList) {
+	if rules.IsBerlin {
+		// Clear out any leftover from previous executions
+		al := newAccessList()
+		s.accessList = al
 
-	s.AddAddressToAccessList(sender)
+		al.AddAddress(sender)
-	if dst != nil {
+		if dst != nil {
-		s.AddAddressToAccessList(*dst)
+			al.AddAddress(*dst)
-		// If it's a create-tx, the destination will be added inside evm.create
+			// If it's a create-tx, the destination will be added inside evm.create
-	}
+		}
-	for _, addr := range precompiles {
+		for _, addr := range precompiles {
-		s.AddAddressToAccessList(addr)
+			al.AddAddress(addr)
-	}
+		}
-	for _, el := range list {
+		for _, el := range list {
-		s.AddAddressToAccessList(el.Address)
+			al.AddAddress(el.Address)
-		for _, key := range el.StorageKeys {
+			for _, key := range el.StorageKeys {
-			s.AddSlotToAccessList(el.Address, key)
+				al.AddSlot(el.Address, key)
+			}
+		}
+		if rules.IsShanghai { // EIP-3651: warm coinbase
+			al.AddAddress(coinbase)
 		}
 	}
+	// Reset transient storage at the beginning of transaction execution
+	s.transientStorage = newTransientStorage()
 }
 
 // AddAddressToAccessList adds the given address to the access list

transient_storage.go

@@ -0,0 +1,55 @@
+// Copyright 2022 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 ipld_eth_statedb
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+)
+
+// transientStorage is a representation of EIP-1153 "Transient Storage".
+type transientStorage map[common.Address]Storage
+
+// newTransientStorage creates a new instance of a transientStorage.
+func newTransientStorage() transientStorage {
+	return make(transientStorage)
+}
+
+// Set sets the transient-storage `value` for `key` at the given `addr`.
+func (t transientStorage) Set(addr common.Address, key, value common.Hash) {
+	if _, ok := t[addr]; !ok {
+		t[addr] = make(Storage)
+	}
+	t[addr][key] = value
+}
+
+// Get gets the transient storage for `key` at the given `addr`.
+func (t transientStorage) Get(addr common.Address, key common.Hash) common.Hash {
+	val, ok := t[addr]
+	if !ok {
+		return common.Hash{}
+	}
+	return val[key]
+}
+
+// Copy does a deep copy of the transientStorage
+func (t transientStorage) Copy() transientStorage {
+	storage := make(transientStorage)
+	for key, value := range t {
+		storage[key] = value.Copy()
+	}
+	return storage
+}