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evmstatedbadapter.go
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evmstatedbadapter.go
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// Copyright (c) 2019 IoTeX Foundation
// This is an alpha (internal) release and is not suitable for production. This source code is provided 'as is' and no
// warranties are given as to title or non-infringement, merchantability or fitness for purpose and, to the extent
// permitted by law, all liability for your use of the code is disclaimed. This source code is governed by Apache
// License 2.0 that can be found in the LICENSE file.
package evm
import (
"bytes"
"context"
"encoding/hex"
"fmt"
"math/big"
"sort"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/pkg/errors"
"go.uber.org/zap"
"github.com/iotexproject/go-pkgs/hash"
"github.com/iotexproject/iotex-address/address"
"github.com/iotexproject/iotex-proto/golang/iotextypes"
"github.com/iotexproject/iotex-core/action"
"github.com/iotexproject/iotex-core/action/protocol"
accountutil "github.com/iotexproject/iotex-core/action/protocol/account/util"
"github.com/iotexproject/iotex-core/db/trie"
"github.com/iotexproject/iotex-core/pkg/log"
"github.com/iotexproject/iotex-core/state"
)
type (
// deleteAccount records the account/contract to be deleted
deleteAccount map[hash.Hash160]struct{}
// contractMap records the contracts being changed
contractMap map[hash.Hash160]Contract
// preimageMap records the preimage of hash reported by VM
preimageMap map[common.Hash]SerializableBytes
// GetBlockHash gets block hash by height
GetBlockHash func(uint64) (hash.Hash256, error)
// DepositGas deposits gas
DepositGas func(context.Context, protocol.StateManager, *big.Int) (*action.TransactionLog, error)
// StateDBAdapter represents the state db adapter for evm to access iotx blockchain
StateDBAdapter struct {
sm protocol.StateManager
logs []*action.Log
transactionLogs []*action.TransactionLog
err error
blockHeight uint64
executionHash hash.Hash256
refund uint64
cachedContract contractMap
contractSnapshot map[int]contractMap // snapshots of contracts
suicided deleteAccount // account/contract calling Suicide
suicideSnapshot map[int]deleteAccount // snapshots of suicide accounts
preimages preimageMap
preimageSnapshot map[int]preimageMap
accessList *accessList // Per-transaction access list
accessListSnapshot map[int]*accessList
notFixTopicCopyBug bool
asyncContractTrie bool
sortCachedContracts bool
usePendingNonce bool
}
)
// StateDBAdapterOption set StateDBAdapter construction param
type StateDBAdapterOption func(*StateDBAdapter) error
// SortCachedContractsOption set sort cached contracts as true
func SortCachedContractsOption() StateDBAdapterOption {
return func(adapter *StateDBAdapter) error {
adapter.sortCachedContracts = true
return nil
}
}
// UsePendingNonceOption set sort cached contracts as true
func UsePendingNonceOption() StateDBAdapterOption {
return func(adapter *StateDBAdapter) error {
adapter.usePendingNonce = true
return nil
}
}
// NewStateDBAdapter creates a new state db with iotex blockchain
func NewStateDBAdapter(
sm protocol.StateManager,
blockHeight uint64,
notFixTopicCopyBug bool,
asyncContractTrie bool,
executionHash hash.Hash256,
opts ...StateDBAdapterOption,
) *StateDBAdapter {
s := &StateDBAdapter{
sm: sm,
logs: []*action.Log{},
err: nil,
blockHeight: blockHeight,
executionHash: executionHash,
cachedContract: make(contractMap),
contractSnapshot: make(map[int]contractMap),
suicided: make(deleteAccount),
suicideSnapshot: make(map[int]deleteAccount),
preimages: make(preimageMap),
preimageSnapshot: make(map[int]preimageMap),
accessList: newAccessList(),
accessListSnapshot: make(map[int]*accessList),
notFixTopicCopyBug: notFixTopicCopyBug,
asyncContractTrie: asyncContractTrie,
}
for _, opt := range opts {
if err := opt(s); err != nil {
log.L().Panic("failed to execute stateDB creation option")
}
}
return s
}
func (stateDB *StateDBAdapter) logError(err error) {
if stateDB.err == nil {
stateDB.err = err
}
}
// Error returns the first stored error during evm contract execution
func (stateDB *StateDBAdapter) Error() error {
return stateDB.err
}
// CreateAccount creates an account in iotx blockchain
func (stateDB *StateDBAdapter) CreateAccount(evmAddr common.Address) {
addr, err := address.FromBytes(evmAddr.Bytes())
if err != nil {
log.L().Error("Failed to convert evm address.", zap.Error(err))
return
}
_, err = accountutil.LoadOrCreateAccount(stateDB.sm, addr.String())
if err != nil {
log.L().Error("Failed to create account.", zap.Error(err))
stateDB.logError(err)
return
}
log.L().Debug("Called CreateAccount.", log.Hex("addrHash", evmAddr[:]))
}
// SubBalance subtracts balance from account
func (stateDB *StateDBAdapter) SubBalance(evmAddr common.Address, amount *big.Int) {
if amount.Cmp(big.NewInt(int64(0))) == 0 {
return
}
// stateDB.GetBalance(evmAddr)
log.L().Debug(fmt.Sprintf("SubBalance %v from %s", amount, evmAddr.Hex()))
addr, err := address.FromBytes(evmAddr.Bytes())
if err != nil {
log.L().Error("Failed to convert evm address.", zap.Error(err))
return
}
state, err := stateDB.AccountState(addr.String())
if err != nil {
log.L().Error("Failed to sub balance.", zap.Error(err))
stateDB.logError(err)
return
}
if err := state.SubBalance(amount); err != nil {
log.L().Error("Failed to sub balance.", zap.Error(err))
stateDB.logError(err)
return
}
if err := accountutil.StoreAccount(stateDB.sm, addr, state); err != nil {
log.L().Error("Failed to update pending account changes to trie.", zap.Error(err))
stateDB.logError(err)
}
}
// AddBalance adds balance to account
func (stateDB *StateDBAdapter) AddBalance(evmAddr common.Address, amount *big.Int) {
if amount.Cmp(big.NewInt(int64(0))) == 0 {
return
}
// stateDB.GetBalance(evmAddr)
log.L().Debug(fmt.Sprintf("AddBalance %v to %s", amount, evmAddr.Hex()))
addr, err := address.FromBytes(evmAddr.Bytes())
if err != nil {
log.L().Error("Failed to convert evm address.", zap.Error(err))
return
}
var state *state.Account
addrHash := hash.BytesToHash160(evmAddr[:])
if contract, ok := stateDB.cachedContract[addrHash]; ok {
state = contract.SelfState()
} else {
state, err = accountutil.LoadOrCreateAccount(stateDB.sm, addr.String())
if err != nil {
log.L().Error("Failed to add balance.", log.Hex("addrHash", evmAddr[:]))
stateDB.logError(err)
return
}
}
if err := state.AddBalance(amount); err != nil {
log.L().Error("Failed to add balance.", zap.Error(err))
stateDB.logError(err)
return
}
if err := accountutil.StoreAccount(stateDB.sm, addr, state); err != nil {
log.L().Error("Failed to update pending account changes to trie.", zap.Error(err))
stateDB.logError(err)
}
}
// GetBalance gets the balance of account
func (stateDB *StateDBAdapter) GetBalance(evmAddr common.Address) *big.Int {
addr, err := address.FromBytes(evmAddr.Bytes())
if err != nil {
log.L().Error("Failed to convert evm address.", zap.Error(err))
return big.NewInt(0)
}
state, err := stateDB.AccountState(addr.String())
if err != nil {
log.L().Error("Failed to get balance.", zap.Error(err))
return big.NewInt(0)
}
log.L().Debug(fmt.Sprintf("Balance of %s is %v", evmAddr.Hex(), state.Balance))
return state.Balance
}
// InitNonce returns the init nonce of an account
func (stateDB *StateDBAdapter) InitNonce() uint64 {
if stateDB.usePendingNonce {
return 1
}
return 0
}
// GetNonce gets the nonce of account
func (stateDB *StateDBAdapter) GetNonce(evmAddr common.Address) uint64 {
addr, err := address.FromBytes(evmAddr.Bytes())
if err != nil {
log.L().Error("Failed to convert evm address.", zap.Error(err))
return 0
}
nonce := uint64(0)
state, err := stateDB.AccountState(addr.String())
if err != nil {
log.L().Error("Failed to get nonce.", zap.Error(err))
// stateDB.logError(err)
} else {
nonce = state.Nonce
}
if stateDB.usePendingNonce {
nonce++
}
log.L().Debug("Called GetNonce.",
zap.String("address", addr.String()),
zap.Uint64("nonce", nonce))
return nonce
}
// SetNonce sets the nonce of account
func (stateDB *StateDBAdapter) SetNonce(evmAddr common.Address, nonce uint64) {
addr, err := address.FromBytes(evmAddr.Bytes())
if err != nil {
log.L().Error("Failed to convert evm address.", zap.Error(err))
return
}
s, err := stateDB.AccountState(addr.String())
if err != nil {
log.L().Error("Failed to set nonce.", zap.Error(err))
// stateDB.logError(err)
return
}
if stateDB.usePendingNonce {
if nonce == 0 {
panic("invalid nonce zero")
}
nonce--
}
log.L().Debug("Called SetNonce.",
zap.String("address", addr.String()),
zap.Uint64("nonce", nonce))
s.Nonce = nonce
if err := accountutil.StoreAccount(stateDB.sm, addr, s); err != nil {
log.L().Error("Failed to set nonce.", zap.Error(err))
stateDB.logError(err)
}
}
// SubRefund subtracts refund
func (stateDB *StateDBAdapter) SubRefund(gas uint64) {
log.L().Debug("Called SubRefund.", zap.Uint64("gas", gas))
// stateDB.journal.append(refundChange{prev: self.refund})
if gas > stateDB.refund {
log.L().Error("SubRefund", zap.Uint64("gas", gas))
log.L().Error("SubRefund", zap.Uint64("stateDB.refund", stateDB.refund))
panic("Refund counter not enough!")
}
stateDB.refund -= gas
}
// AddRefund adds refund
func (stateDB *StateDBAdapter) AddRefund(gas uint64) {
log.L().Debug("Called AddRefund.", zap.Uint64("gas", gas))
// stateDB.journal.append(refundChange{prev: self.refund})
stateDB.refund += gas
}
// GetRefund gets refund
func (stateDB *StateDBAdapter) GetRefund() uint64 {
log.L().Debug("Called GetRefund.")
return stateDB.refund
}
// Suicide kills the contract
func (stateDB *StateDBAdapter) Suicide(evmAddr common.Address) bool {
addr, err := address.FromBytes(evmAddr.Bytes())
if err != nil {
log.L().Error("Failed to convert evm address.", zap.Error(err))
return false
}
if !stateDB.Exist(evmAddr) {
log.L().Debug("Account does not exist.", zap.String("address", addr.String()))
return false
}
s, err := stateDB.AccountState(addr.String())
if err != nil {
log.L().Debug("Failed to get account.", zap.String("address", addr.String()))
return false
}
// clears the account balance
s.Balance = nil
s.Balance = big.NewInt(0)
addrHash := hash.BytesToHash160(evmAddr.Bytes())
if _, err := stateDB.sm.PutState(s, protocol.LegacyKeyOption(addrHash)); err != nil {
log.L().Error("Failed to kill contract.", zap.Error(err))
stateDB.logError(err)
return false
}
// mark it as deleted
stateDB.suicided[addrHash] = struct{}{}
return true
}
// HasSuicided returns whether the contract has been killed
func (stateDB *StateDBAdapter) HasSuicided(evmAddr common.Address) bool {
addrHash := hash.BytesToHash160(evmAddr.Bytes())
_, ok := stateDB.suicided[addrHash]
return ok
}
// Exist checks the existence of an address
func (stateDB *StateDBAdapter) Exist(evmAddr common.Address) bool {
addr, err := address.FromBytes(evmAddr.Bytes())
if err != nil {
log.L().Error("Failed to convert evm address.", zap.Error(err))
return false
}
log.L().Debug("Check existence.", zap.String("address", addr.String()), log.Hex("addrHash", evmAddr[:]))
addrHash := hash.BytesToHash160(addr.Bytes())
if _, ok := stateDB.cachedContract[addrHash]; ok {
return true
}
recorded, err := accountutil.Recorded(stateDB.sm, addr)
if !recorded || err != nil {
log.L().Debug("Account does not exist.", zap.String("address", addr.String()))
return false
}
return true
}
// PrepareAccessList handles the preparatory steps for executing a state transition with
// regards to both EIP-2929 and EIP-2930:
//
// - 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.
func (stateDB *StateDBAdapter) PrepareAccessList(sender common.Address, dst *common.Address, precompiles []common.Address, list types.AccessList) {
stateDB.AddAddressToAccessList(sender)
if dst != nil {
stateDB.AddAddressToAccessList(*dst)
// If it's a create-tx, the destination will be added inside evm.create
}
for _, addr := range precompiles {
stateDB.AddAddressToAccessList(addr)
}
for _, el := range list {
stateDB.AddAddressToAccessList(el.Address)
for _, key := range el.StorageKeys {
stateDB.AddSlotToAccessList(el.Address, key)
}
}
}
// AddressInAccessList returns true if the given address is in the access list
func (stateDB *StateDBAdapter) AddressInAccessList(addr common.Address) bool {
return stateDB.accessList.ContainsAddress(addr)
}
// SlotInAccessList returns true if the given (address, slot)-tuple is in the access list
func (stateDB *StateDBAdapter) SlotInAccessList(addr common.Address, slot common.Hash) (addressOk bool, slotOk bool) {
return stateDB.accessList.Contains(addr, slot)
}
// AddAddressToAccessList adds the given address to the access list. This operation is safe to perform
// even if the feature/fork is not active yet
func (stateDB *StateDBAdapter) AddAddressToAccessList(addr common.Address) {
stateDB.accessList.AddAddress(addr)
}
// AddSlotToAccessList adds the given (address,slot) to the access list. This operation is safe to perform
// even if the feature/fork is not active yet
func (stateDB *StateDBAdapter) AddSlotToAccessList(addr common.Address, slot common.Hash) {
stateDB.accessList.AddSlot(addr, slot)
}
// Empty returns true if the the contract is empty
func (stateDB *StateDBAdapter) Empty(evmAddr common.Address) bool {
addr, err := address.FromBytes(evmAddr.Bytes())
if err != nil {
log.L().Error("Failed to convert evm address.", zap.Error(err))
return true
}
log.L().Debug("Check whether the contract is empty.")
s, err := stateDB.AccountState(addr.String())
if err != nil {
return true
}
// TODO: delete hash.ZeroHash256
return s.Nonce == 0 &&
s.Balance.Sign() == 0 &&
(len(s.CodeHash) == 0 || bytes.Equal(s.CodeHash, hash.ZeroHash256[:]))
}
// RevertToSnapshot reverts the state factory to the state at a given snapshot
func (stateDB *StateDBAdapter) RevertToSnapshot(snapshot int) {
if err := stateDB.sm.Revert(snapshot); err != nil {
err := errors.New("unexpected error: state manager's Revert() failed")
log.L().Error("Failed to revert to snapshot.", zap.Error(err))
stateDB.logError(err)
return
}
ds, ok := stateDB.suicideSnapshot[snapshot]
if !ok {
// this should not happen, b/c we save the suicide accounts on a successful return of Snapshot(), but check anyway
log.L().Error("Failed to get snapshot.", zap.Int("snapshot", snapshot))
return
}
// restore the suicide accounts
stateDB.suicided = nil
stateDB.suicided = ds
// restore modified contracts
stateDB.cachedContract = nil
stateDB.cachedContract = stateDB.contractSnapshot[snapshot]
for _, addr := range stateDB.cachedContractAddrs() {
c := stateDB.cachedContract[addr]
if err := c.LoadRoot(); err != nil {
log.L().Error("Failed to load root for contract.", zap.Error(err), log.Hex("addrHash", addr[:]))
return
}
}
// restore preimages
stateDB.preimages = nil
stateDB.preimages = stateDB.preimageSnapshot[snapshot]
// restore access list
stateDB.accessList = nil
stateDB.accessList = stateDB.accessListSnapshot[snapshot]
}
func (stateDB *StateDBAdapter) cachedContractAddrs() []hash.Hash160 {
addrs := make([]hash.Hash160, 0, len(stateDB.cachedContract))
for addr := range stateDB.cachedContract {
addrs = append(addrs, addr)
}
if stateDB.sortCachedContracts {
sort.Slice(addrs, func(i, j int) bool { return bytes.Compare(addrs[i][:], addrs[j][:]) < 0 })
}
return addrs
}
// Snapshot returns the snapshot id
func (stateDB *StateDBAdapter) Snapshot() int {
sn := stateDB.sm.Snapshot()
if _, ok := stateDB.suicideSnapshot[sn]; ok {
err := errors.New("unexpected error: duplicate snapshot version")
log.L().Error("Failed to snapshot.", zap.Error(err))
// stateDB.err = err
return sn
}
// save a copy of current suicide accounts
sa := make(deleteAccount)
for k, v := range stateDB.suicided {
sa[k] = v
}
stateDB.suicideSnapshot[sn] = sa
// save a copy of modified contracts
c := make(contractMap)
for _, addr := range stateDB.cachedContractAddrs() {
c[addr] = stateDB.cachedContract[addr].Snapshot()
}
stateDB.contractSnapshot[sn] = c
// save a copy of preimages
p := make(preimageMap)
for k, v := range stateDB.preimages {
p[k] = v
}
stateDB.preimageSnapshot[sn] = p
// save a copy of access list
stateDB.accessListSnapshot[sn] = stateDB.accessList.Copy()
return sn
}
// AddLog adds log whose transaction amount is larger than 0
func (stateDB *StateDBAdapter) AddLog(evmLog *types.Log) {
log.L().Debug("Called AddLog.", zap.Any("log", evmLog))
addr, err := address.FromBytes(evmLog.Address.Bytes())
if err != nil {
log.L().Error("Failed to convert evm address.", zap.Error(err))
return
}
var topics []hash.Hash256
for _, evmTopic := range evmLog.Topics {
var topic hash.Hash256
copy(topic[:], evmTopic.Bytes())
topics = append(topics, topic)
}
if topics[0] == inContractTransfer {
if len(topics) != 3 {
panic("Invalid in contract transfer topics")
}
if amount, zero := new(big.Int).SetBytes(evmLog.Data), big.NewInt(0); amount.Cmp(zero) == 1 {
from, _ := address.FromBytes(topics[1][12:])
to, _ := address.FromBytes(topics[2][12:])
stateDB.transactionLogs = append(stateDB.transactionLogs, &action.TransactionLog{
Type: iotextypes.TransactionLogType_IN_CONTRACT_TRANSFER,
Sender: from.String(),
Recipient: to.String(),
Amount: amount,
})
}
return
}
stateDB.logs = append(stateDB.logs, &action.Log{
Address: addr.String(),
Topics: topics,
Data: evmLog.Data,
BlockHeight: stateDB.blockHeight,
ActionHash: stateDB.executionHash,
NotFixTopicCopyBug: stateDB.notFixTopicCopyBug,
})
}
// Logs returns the logs
func (stateDB *StateDBAdapter) Logs() []*action.Log {
return stateDB.logs
}
// TransactionLogs returns the transaction logs
func (stateDB *StateDBAdapter) TransactionLogs() []*action.TransactionLog {
return stateDB.transactionLogs
}
// AddPreimage adds the preimage of a hash
func (stateDB *StateDBAdapter) AddPreimage(hash common.Hash, preimage []byte) {
if _, ok := stateDB.preimages[hash]; !ok {
b := make([]byte, len(preimage))
copy(b, preimage)
stateDB.preimages[hash] = b
}
}
// ForEachStorage loops each storage
func (stateDB *StateDBAdapter) ForEachStorage(addr common.Address, cb func(common.Hash, common.Hash) bool) error {
ctt, err := stateDB.getContract(hash.BytesToHash160(addr[:]))
if err != nil {
// stateDB.err = err
return err
}
iter, err := ctt.Iterator()
if err != nil {
// stateDB.err = err
return err
}
for {
key, value, err := iter.Next()
if err == trie.ErrEndOfIterator {
// hit the end of the iterator, exit now
return nil
}
if err != nil {
return err
}
ckey := common.Hash{}
copy(ckey[:], key[:])
cvalue := common.Hash{}
copy(cvalue[:], value[:])
if !cb(ckey, cvalue) {
return nil
}
}
return nil
}
// AccountState returns an account state
func (stateDB *StateDBAdapter) AccountState(encodedAddr string) (*state.Account, error) {
addr, err := address.FromString(encodedAddr)
if err != nil {
return nil, errors.Wrap(err, "failed to get public key hash from encoded address")
}
addrHash := hash.BytesToHash160(addr.Bytes())
if contract, ok := stateDB.cachedContract[addrHash]; ok {
return contract.SelfState(), nil
}
return accountutil.LoadAccount(stateDB.sm, addrHash)
}
//======================================
// Contract functions
//======================================
// GetCodeHash returns contract's code hash
func (stateDB *StateDBAdapter) GetCodeHash(evmAddr common.Address) common.Hash {
addr := hash.BytesToHash160(evmAddr[:])
codeHash := common.Hash{}
if contract, ok := stateDB.cachedContract[addr]; ok {
copy(codeHash[:], contract.SelfState().CodeHash)
return codeHash
}
account, err := accountutil.LoadAccount(stateDB.sm, addr)
if err != nil {
log.L().Error("Failed to get code hash.", zap.Error(err))
// TODO (zhi) not all err should be logged
// stateDB.logError(err)
return codeHash
}
copy(codeHash[:], account.CodeHash)
return codeHash
}
// GetCode returns contract's code
func (stateDB *StateDBAdapter) GetCode(evmAddr common.Address) []byte {
addr := hash.BytesToHash160(evmAddr[:])
if contract, ok := stateDB.cachedContract[addr]; ok {
code, err := contract.GetCode()
if err != nil {
log.L().Error("Failed to get code hash.", zap.Error(err))
return nil
}
return code
}
account, err := accountutil.LoadAccount(stateDB.sm, addr)
if err != nil {
log.L().Error("Failed to load account state for address.", log.Hex("addrHash", addr[:]))
return nil
}
var code SerializableBytes
if _, err = stateDB.sm.State(&code, protocol.NamespaceOption(CodeKVNameSpace), protocol.KeyOption(account.CodeHash[:])); err != nil {
// TODO: Suppress the as it's too much now
//log.L().Error("Failed to get code from trie.", zap.Error(err))
return nil
}
return code[:]
}
// GetCodeSize gets the code size saved in hash
func (stateDB *StateDBAdapter) GetCodeSize(evmAddr common.Address) int {
code := stateDB.GetCode(evmAddr)
if code == nil {
return 0
}
log.L().Debug("Called GetCodeSize.", log.Hex("addrHash", evmAddr[:]))
return len(code)
}
// SetCode sets contract's code
func (stateDB *StateDBAdapter) SetCode(evmAddr common.Address, code []byte) {
addr := hash.BytesToHash160(evmAddr[:])
contract, err := stateDB.getContract(addr)
if err != nil {
log.L().Error("Failed to get contract.", zap.Error(err), log.Hex("addrHash", addr[:]))
stateDB.logError(err)
return
}
contract.SetCode(hash.Hash256b(code), code)
}
// GetCommittedState gets committed state
func (stateDB *StateDBAdapter) GetCommittedState(evmAddr common.Address, k common.Hash) common.Hash {
addr := hash.BytesToHash160(evmAddr[:])
contract, err := stateDB.getContract(addr)
if err != nil {
log.L().Error("Failed to get contract.", zap.Error(err), log.Hex("addrHash", addr[:]))
stateDB.logError(err)
return common.Hash{}
}
v, err := contract.GetCommittedState(hash.BytesToHash256(k[:]))
if err != nil {
log.L().Error("Failed to get committed state.", zap.Error(err))
stateDB.logError(err)
return common.Hash{}
}
return common.BytesToHash(v)
}
// GetState gets state
func (stateDB *StateDBAdapter) GetState(evmAddr common.Address, k common.Hash) common.Hash {
addr := hash.BytesToHash160(evmAddr[:])
contract, err := stateDB.getContract(addr)
if err != nil {
log.L().Error("Failed to get contract.", zap.Error(err), log.Hex("addrHash", addr[:]))
stateDB.logError(err)
return common.Hash{}
}
v, err := contract.GetState(hash.BytesToHash256(k[:]))
if err != nil {
log.L().Debug("Failed to get state.", zap.Error(err))
stateDB.logError(err)
return common.Hash{}
}
return common.BytesToHash(v)
}
// SetState sets state
func (stateDB *StateDBAdapter) SetState(evmAddr common.Address, k, v common.Hash) {
addr := hash.BytesToHash160(evmAddr[:])
contract, err := stateDB.getContract(addr)
if err != nil {
log.L().Error("Failed to get contract.", zap.Error(err), log.Hex("addrHash", addr[:]))
stateDB.logError(err)
return
}
log.L().Debug("Called SetState", log.Hex("addrHash", evmAddr[:]), log.Hex("k", k[:]))
if err := contract.SetState(hash.BytesToHash256(k[:]), v[:]); err != nil {
log.L().Error("Failed to set state.", zap.Error(err), log.Hex("addrHash", addr[:]))
stateDB.logError(err)
return
}
}
// CommitContracts commits contract code to db and update pending contract account changes to trie
func (stateDB *StateDBAdapter) CommitContracts() error {
addrStrs := make([]string, 0)
for addr := range stateDB.cachedContract {
addrStrs = append(addrStrs, hex.EncodeToString(addr[:]))
}
sort.Strings(addrStrs)
for _, addrStr := range addrStrs {
var addr hash.Hash160
addrBytes, err := hex.DecodeString(addrStr)
if err != nil {
return errors.Wrap(err, "failed to decode address hash")
}
copy(addr[:], addrBytes)
if _, ok := stateDB.suicided[addr]; ok {
// no need to update a suicide account/contract
continue
}
contract := stateDB.cachedContract[addr]
if err := contract.Commit(); err != nil {
stateDB.logError(err)
return errors.Wrap(err, "failed to commit contract")
}
state := contract.SelfState()
// store the account (with new storage trie root) into account trie
if _, err := stateDB.sm.PutState(state, protocol.LegacyKeyOption(addr)); err != nil {
stateDB.logError(err)
return errors.Wrap(err, "failed to update pending account changes to trie")
}
}
// delete suicided accounts/contract
addrStrs = make([]string, 0)
for addr := range stateDB.suicided {
addrStrs = append(addrStrs, hex.EncodeToString(addr[:]))
}
sort.Strings(addrStrs)
for _, addrStr := range addrStrs {
var addr hash.Hash160
addrBytes, err := hex.DecodeString(addrStr)
if err != nil {
return errors.Wrap(err, "failed to decode address hash")
}
copy(addr[:], addrBytes)
if _, err := stateDB.sm.DelState(protocol.LegacyKeyOption(addr)); err != nil {
stateDB.logError(err)
return errors.Wrapf(err, "failed to delete suicide account/contract %x", addr[:])
}
}
// write preimages to DB
addrStrs = make([]string, 0)
for addr := range stateDB.preimages {
addrStrs = append(addrStrs, hex.EncodeToString(addr[:]))
}
sort.Strings(addrStrs)
for _, addrStr := range addrStrs {
var k common.Hash
addrBytes, err := hex.DecodeString(addrStr)
if err != nil {
return errors.Wrap(err, "failed to decode address hash")
}
copy(k[:], addrBytes)
v := stateDB.preimages[k]
h := make([]byte, len(k))
copy(h, k[:])
stateDB.sm.PutState(v, protocol.NamespaceOption(PreimageKVNameSpace), protocol.KeyOption(h))
}
return nil
}
// getContract returns the contract of addr
func (stateDB *StateDBAdapter) getContract(addr hash.Hash160) (Contract, error) {
if contract, ok := stateDB.cachedContract[addr]; ok {
return contract, nil
}
return stateDB.getNewContract(addr)
}
func (stateDB *StateDBAdapter) getNewContract(addr hash.Hash160) (Contract, error) {
account, err := accountutil.LoadAccount(stateDB.sm, addr)
if err != nil {
return nil, errors.Wrapf(err, "failed to load account state for address %x", addr)
}
contract, err := newContract(addr, account, stateDB.sm, stateDB.asyncContractTrie)
if err != nil {
return nil, errors.Wrapf(err, "failed to create storage trie for new contract %x", addr)
}
// add to contract cache
stateDB.cachedContract[addr] = contract
return contract, nil
}
// clear clears local changes
func (stateDB *StateDBAdapter) clear() {
stateDB.cachedContract = nil
stateDB.contractSnapshot = nil
stateDB.suicided = nil
stateDB.suicideSnapshot = nil
stateDB.preimages = nil
stateDB.preimageSnapshot = nil
stateDB.accessList = nil
stateDB.accessListSnapshot = nil
stateDB.cachedContract = make(contractMap)
stateDB.contractSnapshot = make(map[int]contractMap)
stateDB.suicided = make(deleteAccount)
stateDB.suicideSnapshot = make(map[int]deleteAccount)
stateDB.preimages = make(preimageMap)
stateDB.preimageSnapshot = make(map[int]preimageMap)
stateDB.accessList = newAccessList()
stateDB.accessListSnapshot = make(map[int]*accessList)
}