mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
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853 lines
27 KiB
Go
853 lines
27 KiB
Go
// Copyright 2019 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Package state provides a caching layer atop the Ethereum state trie.
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package state
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import (
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"fmt"
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"sort"
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"github.com/holiman/uint256"
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"github.com/ledgerwatch/erigon/common"
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"github.com/ledgerwatch/erigon/common/u256"
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"github.com/ledgerwatch/erigon/core/types"
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"github.com/ledgerwatch/erigon/core/types/accounts"
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"github.com/ledgerwatch/erigon/crypto"
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"github.com/ledgerwatch/erigon/log"
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"github.com/ledgerwatch/erigon/params"
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"github.com/ledgerwatch/erigon/turbo/trie"
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)
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type revision struct {
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id int
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journalIndex int
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}
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type StateTracer interface {
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CaptureAccountRead(account common.Address) error
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CaptureAccountWrite(account common.Address) error
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}
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// IntraBlockState is responsible for caching and managing state changes
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// that occur during block's execution.
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// NOT THREAD SAFE!
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type IntraBlockState struct {
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stateReader StateReader
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// This map holds 'live' objects, which will get modified while processing a state transition.
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stateObjects map[common.Address]*stateObject
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stateObjectsDirty map[common.Address]struct{}
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nilAccounts map[common.Address]struct{} // Remember non-existent account to avoid reading them again
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// DB error.
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// State objects are used by the consensus core and VM which are
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// unable to deal with database-level errors. Any error that occurs
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// during a database read is memoized here and will eventually be returned
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// by IntraBlockState.Commit.
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dbErr error
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// The refund counter, also used by state transitioning.
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refund uint64
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thash, bhash common.Hash
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txIndex int
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logs map[common.Hash][]*types.Log
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logSize uint
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preimages map[common.Hash][]byte
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// Journal of state modifications. This is the backbone of
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// Snapshot and RevertToSnapshot.
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journal *journal
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validRevisions []revision
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nextRevisionID int
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tracer StateTracer
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trace bool
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accessList *accessList
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}
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// Create a new state from a given trie
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func New(stateReader StateReader) *IntraBlockState {
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return &IntraBlockState{
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stateReader: stateReader,
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stateObjects: make(map[common.Address]*stateObject),
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stateObjectsDirty: make(map[common.Address]struct{}),
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nilAccounts: make(map[common.Address]struct{}),
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logs: make(map[common.Hash][]*types.Log),
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preimages: make(map[common.Hash][]byte),
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journal: newJournal(),
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accessList: newAccessList(),
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}
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}
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// Copy creates a deep, independent copy of the state.
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// Snapshots of the copied state cannot be applied to the copy.
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func (sdb *IntraBlockState) Copy() *IntraBlockState {
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// Copy all the basic fields, initialize the memory ones
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ibs := &IntraBlockState{
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stateReader: sdb.stateReader,
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stateObjects: make(map[common.Address]*stateObject, len(sdb.journal.dirties)),
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stateObjectsDirty: make(map[common.Address]struct{}, len(sdb.journal.dirties)),
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nilAccounts: make(map[common.Address]struct{}),
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refund: sdb.refund,
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logs: make(map[common.Hash][]*types.Log, len(sdb.logs)),
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logSize: sdb.logSize,
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preimages: make(map[common.Hash][]byte, len(sdb.preimages)),
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journal: newJournal(),
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}
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// Copy the dirty states, logs, and preimages
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for addr := range sdb.journal.dirties {
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// As documented [here](https://github.com/ethereum/go-ethereum/pull/16485#issuecomment-380438527),
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// and in the Finalise-method, there is a case where an object is in the journal but not
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// in the stateObjects: OOG after touch on ripeMD prior to Byzantium. Thus, we need to check for
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// nil
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if object, exist := sdb.stateObjects[addr]; exist {
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// Even though the original object is dirty, we are not copying the journal,
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// so we need to make sure that anyside effect the journal would have caused
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// during a commit (or similar op) is already applied to the copy.
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ibs.stateObjects[addr] = object.deepCopy(ibs)
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ibs.stateObjectsDirty[addr] = struct{}{} // Mark the copy dirty to force internal (code/state) commits
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}
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}
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// Above, we don't copy the actual journal. This means that if the copy is copied, the
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// loop above will be a no-op, since the copy's journal is empty.
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// Thus, here we iterate over stateObjects, to enable copies of copies
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for addr := range sdb.stateObjectsDirty {
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if _, exist := ibs.stateObjects[addr]; !exist {
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ibs.stateObjects[addr] = sdb.stateObjects[addr].deepCopy(ibs)
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}
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ibs.stateObjectsDirty[addr] = struct{}{}
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}
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for hash, logs := range sdb.logs {
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cpy := make([]*types.Log, len(logs))
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for i, l := range logs {
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cpy[i] = new(types.Log)
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*cpy[i] = *l
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}
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ibs.logs[hash] = cpy
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}
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for hash, preimage := range sdb.preimages {
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ibs.preimages[hash] = preimage
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}
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// comment from https://github.com/ethereum/go-ethereum/commit/6487c002f6b47e08cb9814f16712c6789b313a97#diff-c3757dc9e9d868f63bc84a0cc67159c1d5c22cc5d8c9468757098f0492e0658cR705
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// Do we need to copy the access list? In practice: No. At the start of a
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// transaction, the access list is empty. In practice, we only ever copy state
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// _between_ transactions/blocks, never in the middle of a transaction.
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// However, it doesn't cost us much to copy an empty list, so we do it anyway
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// to not blow up if we ever decide copy it in the middle of a transaction
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ibs.accessList = sdb.accessList.Copy()
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return ibs
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}
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func (sdb *IntraBlockState) SetTracer(tracer StateTracer) {
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sdb.tracer = tracer
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}
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func (sdb *IntraBlockState) SetTrace(trace bool) {
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sdb.trace = trace
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}
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// setErrorUnsafe sets error but should be called in medhods that already have locks
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func (sdb *IntraBlockState) setErrorUnsafe(err error) {
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if sdb.dbErr == nil {
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sdb.dbErr = err
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}
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}
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func (sdb *IntraBlockState) Error() error {
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return sdb.dbErr
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}
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// Reset clears out all ephemeral state objects from the state db, but keeps
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// the underlying state trie to avoid reloading data for the next operations.
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func (sdb *IntraBlockState) Reset() {
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sdb.stateObjects = make(map[common.Address]*stateObject)
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sdb.stateObjectsDirty = make(map[common.Address]struct{})
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sdb.thash = common.Hash{}
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sdb.bhash = common.Hash{}
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sdb.txIndex = 0
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sdb.logs = make(map[common.Hash][]*types.Log)
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sdb.logSize = 0
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sdb.preimages = make(map[common.Hash][]byte)
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sdb.clearJournalAndRefund()
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sdb.accessList = newAccessList()
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}
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func (sdb *IntraBlockState) AddLog(log *types.Log) {
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sdb.journal.append(addLogChange{txhash: sdb.thash})
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log.TxHash = sdb.thash
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log.BlockHash = sdb.bhash
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log.TxIndex = uint(sdb.txIndex)
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log.Index = sdb.logSize
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sdb.logs[sdb.thash] = append(sdb.logs[sdb.thash], log)
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sdb.logSize++
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}
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func (sdb *IntraBlockState) GetLogs(hash common.Hash) []*types.Log {
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return sdb.logs[hash]
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}
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func (sdb *IntraBlockState) Logs() []*types.Log {
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var logs []*types.Log
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for _, lgs := range sdb.logs {
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logs = append(logs, lgs...)
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}
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return logs
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}
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// AddPreimage records a SHA3 preimage seen by the VM.
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func (sdb *IntraBlockState) AddPreimage(hash common.Hash, preimage []byte) {
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if _, ok := sdb.preimages[hash]; !ok {
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sdb.journal.append(addPreimageChange{hash: hash})
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pi := make([]byte, len(preimage))
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copy(pi, preimage)
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sdb.preimages[hash] = pi
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}
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}
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// Preimages returns a list of SHA3 preimages that have been submitted.
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func (sdb *IntraBlockState) Preimages() map[common.Hash][]byte {
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return sdb.preimages
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}
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// AddRefund adds gas to the refund counter
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func (sdb *IntraBlockState) AddRefund(gas uint64) {
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sdb.journal.append(refundChange{prev: sdb.refund})
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sdb.refund += gas
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}
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// SubRefund removes gas from the refund counter.
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// This method will panic if the refund counter goes below zero
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func (sdb *IntraBlockState) SubRefund(gas uint64) {
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sdb.journal.append(refundChange{prev: sdb.refund})
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if gas > sdb.refund {
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panic("Refund counter below zero")
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}
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sdb.refund -= gas
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}
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// Exist reports whether the given account address exists in the state.
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// Notably this also returns true for suicided accounts.
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func (sdb *IntraBlockState) Exist(addr common.Address) bool {
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if sdb.tracer != nil {
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err := sdb.tracer.CaptureAccountRead(addr)
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if sdb.trace {
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fmt.Println("CaptureAccountRead err", err)
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}
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}
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s := sdb.getStateObject(addr)
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return s != nil && !s.deleted
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}
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// Empty returns whether the state object is either non-existent
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// or empty according to the EIP161 specification (balance = nonce = code = 0)
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func (sdb *IntraBlockState) Empty(addr common.Address) bool {
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if sdb.tracer != nil {
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err := sdb.tracer.CaptureAccountRead(addr)
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if sdb.trace {
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fmt.Println("CaptureAccountRead err", err)
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}
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}
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so := sdb.getStateObject(addr)
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return so == nil || so.deleted || so.empty()
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}
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// GetBalance retrieves the balance from the given address or 0 if object not found
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// DESCRIBED: docs/programmers_guide/guide.md#address---identifier-of-an-account
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func (sdb *IntraBlockState) GetBalance(addr common.Address) *uint256.Int {
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if sdb.tracer != nil {
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err := sdb.tracer.CaptureAccountRead(addr)
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if sdb.trace {
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fmt.Println("CaptureAccountRead err", err)
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}
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}
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stateObject := sdb.getStateObject(addr)
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if stateObject != nil && !stateObject.deleted {
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return stateObject.Balance()
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}
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return u256.Num0
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}
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// DESCRIBED: docs/programmers_guide/guide.md#address---identifier-of-an-account
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func (sdb *IntraBlockState) GetNonce(addr common.Address) uint64 {
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if sdb.tracer != nil {
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err := sdb.tracer.CaptureAccountRead(addr)
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if sdb.trace {
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fmt.Println("CaptureAccountRead err", err)
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}
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}
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stateObject := sdb.getStateObject(addr)
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if stateObject != nil && !stateObject.deleted {
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return stateObject.Nonce()
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}
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return 0
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}
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// TxIndex returns the current transaction index set by Prepare.
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func (sdb *IntraBlockState) TxIndex() int {
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return sdb.txIndex
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}
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// DESCRIBED: docs/programmers_guide/guide.md#address---identifier-of-an-account
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func (sdb *IntraBlockState) GetCode(addr common.Address) []byte {
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if sdb.tracer != nil {
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err := sdb.tracer.CaptureAccountRead(addr)
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if sdb.trace {
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fmt.Println("CaptureAccountRead err", err)
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}
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}
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stateObject := sdb.getStateObject(addr)
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if stateObject != nil && !stateObject.deleted {
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if sdb.trace {
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fmt.Printf("GetCode %x, returned %d\n", addr, len(stateObject.Code()))
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}
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return stateObject.Code()
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}
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if sdb.trace {
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fmt.Printf("GetCode %x, returned nil\n", addr)
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}
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return nil
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}
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// DESCRIBED: docs/programmers_guide/guide.md#address---identifier-of-an-account
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func (sdb *IntraBlockState) GetCodeSize(addr common.Address) int {
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if sdb.tracer != nil {
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err := sdb.tracer.CaptureAccountRead(addr)
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if sdb.trace {
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fmt.Println("CaptureAccountRead err", err)
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}
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}
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stateObject := sdb.getStateObject(addr)
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if stateObject == nil || stateObject.deleted {
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return 0
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}
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if stateObject.code != nil {
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return len(stateObject.code)
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}
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len, err := sdb.stateReader.ReadAccountCodeSize(addr, stateObject.data.Incarnation, common.BytesToHash(stateObject.CodeHash()))
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if err != nil {
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sdb.setErrorUnsafe(err)
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}
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return len
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}
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// DESCRIBED: docs/programmers_guide/guide.md#address---identifier-of-an-account
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func (sdb *IntraBlockState) GetCodeHash(addr common.Address) common.Hash {
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if sdb.tracer != nil {
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err := sdb.tracer.CaptureAccountRead(addr)
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if sdb.trace {
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fmt.Println("CaptureAccountRead err", err)
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}
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}
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stateObject := sdb.getStateObject(addr)
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if stateObject == nil || stateObject.deleted {
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return common.Hash{}
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}
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return common.BytesToHash(stateObject.CodeHash())
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}
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// GetState retrieves a value from the given account's storage trie.
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// DESCRIBED: docs/programmers_guide/guide.md#address---identifier-of-an-account
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func (sdb *IntraBlockState) GetState(addr common.Address, key *common.Hash, value *uint256.Int) {
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stateObject := sdb.getStateObject(addr)
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if stateObject != nil && !stateObject.deleted {
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stateObject.GetState(key, value)
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} else {
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value.Clear()
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}
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}
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// GetCommittedState retrieves a value from the given account's committed storage trie.
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// DESCRIBED: docs/programmers_guide/guide.md#address---identifier-of-an-account
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func (sdb *IntraBlockState) GetCommittedState(addr common.Address, key *common.Hash, value *uint256.Int) {
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stateObject := sdb.getStateObject(addr)
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if stateObject != nil && !stateObject.deleted {
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stateObject.GetCommittedState(key, value)
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} else {
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value.Clear()
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}
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}
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func (sdb *IntraBlockState) HasSuicided(addr common.Address) bool {
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stateObject := sdb.getStateObject(addr)
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if stateObject == nil {
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return false
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}
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if stateObject.deleted {
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return false
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}
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if stateObject.created {
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return false
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}
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return stateObject.suicided
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}
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/*
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* SETTERS
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*/
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// AddBalance adds amount to the account associated with addr.
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// DESCRIBED: docs/programmers_guide/guide.md#address---identifier-of-an-account
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func (sdb *IntraBlockState) AddBalance(addr common.Address, amount *uint256.Int) {
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if sdb.trace {
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fmt.Printf("AddBalance %x, %d\n", addr, amount)
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}
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if sdb.tracer != nil {
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err := sdb.tracer.CaptureAccountWrite(addr)
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if sdb.trace {
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fmt.Println("CaptureAccountWrite err", err)
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}
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}
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stateObject := sdb.GetOrNewStateObject(addr)
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if stateObject != nil {
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stateObject.AddBalance(amount)
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}
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}
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// SubBalance subtracts amount from the account associated with addr.
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// DESCRIBED: docs/programmers_guide/guide.md#address---identifier-of-an-account
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func (sdb *IntraBlockState) SubBalance(addr common.Address, amount *uint256.Int) {
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if sdb.trace {
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fmt.Printf("SubBalance %x, %d\n", addr, amount)
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}
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if sdb.tracer != nil {
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err := sdb.tracer.CaptureAccountWrite(addr)
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if sdb.trace {
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fmt.Println("CaptureAccountWrite err", err)
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}
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}
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stateObject := sdb.GetOrNewStateObject(addr)
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if stateObject != nil {
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stateObject.SubBalance(amount)
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}
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}
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// DESCRIBED: docs/programmers_guide/guide.md#address---identifier-of-an-account
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func (sdb *IntraBlockState) SetBalance(addr common.Address, amount *uint256.Int) {
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if sdb.tracer != nil {
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err := sdb.tracer.CaptureAccountWrite(addr)
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if sdb.trace {
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fmt.Println("CaptureAccountWrite err", err)
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}
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}
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stateObject := sdb.GetOrNewStateObject(addr)
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if stateObject != nil {
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stateObject.SetBalance(amount)
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}
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}
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// DESCRIBED: docs/programmers_guide/guide.md#address---identifier-of-an-account
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func (sdb *IntraBlockState) SetNonce(addr common.Address, nonce uint64) {
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if sdb.tracer != nil {
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err := sdb.tracer.CaptureAccountWrite(addr)
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if sdb.trace {
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fmt.Println("CaptureAccountWrite err", err)
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}
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}
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stateObject := sdb.GetOrNewStateObject(addr)
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if stateObject != nil {
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stateObject.SetNonce(nonce)
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}
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}
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// DESCRIBED: docs/programmers_guide/guide.md#code-hash
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// DESCRIBED: docs/programmers_guide/guide.md#address---identifier-of-an-account
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|
func (sdb *IntraBlockState) SetCode(addr common.Address, code []byte) {
|
|
if sdb.tracer != nil {
|
|
err := sdb.tracer.CaptureAccountWrite(addr)
|
|
if sdb.trace {
|
|
fmt.Println("CaptureAccountWrite err", err)
|
|
}
|
|
}
|
|
|
|
stateObject := sdb.GetOrNewStateObject(addr)
|
|
if stateObject != nil {
|
|
stateObject.SetCode(crypto.Keccak256Hash(code), code)
|
|
}
|
|
}
|
|
|
|
// DESCRIBED: docs/programmers_guide/guide.md#address---identifier-of-an-account
|
|
func (sdb *IntraBlockState) SetState(addr common.Address, key *common.Hash, value uint256.Int) {
|
|
stateObject := sdb.GetOrNewStateObject(addr)
|
|
if stateObject != nil {
|
|
stateObject.SetState(key, value)
|
|
}
|
|
}
|
|
|
|
// SetStorage replaces the entire storage for the specified account with given
|
|
// storage. This function should only be used for debugging.
|
|
func (sdb *IntraBlockState) SetStorage(addr common.Address, storage Storage) {
|
|
fmt.Printf("SetStorage: %x, %s\n ", addr, storage.String())
|
|
stateObject := sdb.GetOrNewStateObject(addr)
|
|
if stateObject != nil {
|
|
stateObject.SetStorage(storage)
|
|
}
|
|
}
|
|
|
|
// SetIncarnation sets incarnation for account if account exists
|
|
func (sdb *IntraBlockState) SetIncarnation(addr common.Address, incarnation uint64) {
|
|
stateObject := sdb.GetOrNewStateObject(addr)
|
|
if stateObject != nil {
|
|
stateObject.setIncarnation(incarnation)
|
|
}
|
|
}
|
|
|
|
func (sdb *IntraBlockState) GetIncarnation(addr common.Address) uint64 {
|
|
stateObject := sdb.getStateObject(addr)
|
|
if stateObject != nil {
|
|
return stateObject.data.Incarnation
|
|
}
|
|
return 0
|
|
}
|
|
|
|
// Suicide marks the given account as suicided.
|
|
// This clears the account balance.
|
|
//
|
|
// The account's state object is still available until the state is committed,
|
|
// getStateObject will return a non-nil account after Suicide.
|
|
func (sdb *IntraBlockState) Suicide(addr common.Address) bool {
|
|
if sdb.tracer != nil {
|
|
err := sdb.tracer.CaptureAccountRead(addr)
|
|
if sdb.trace {
|
|
fmt.Println("CaptureAccountRead err", err)
|
|
}
|
|
err = sdb.tracer.CaptureAccountWrite(addr)
|
|
if sdb.trace {
|
|
fmt.Println("CaptureAccountWrite err", err)
|
|
}
|
|
}
|
|
stateObject := sdb.getStateObject(addr)
|
|
if stateObject == nil || stateObject.deleted {
|
|
return false
|
|
}
|
|
sdb.journal.append(suicideChange{
|
|
account: &addr,
|
|
prev: stateObject.suicided,
|
|
prevbalance: *stateObject.Balance(),
|
|
})
|
|
stateObject.markSuicided()
|
|
stateObject.created = false
|
|
stateObject.data.Balance.Clear()
|
|
|
|
return true
|
|
}
|
|
|
|
// Retrieve a state object given my the address. Returns nil if not found.
|
|
func (sdb *IntraBlockState) getStateObject(addr common.Address) (stateObject *stateObject) {
|
|
// Prefer 'live' objects.
|
|
if obj := sdb.stateObjects[addr]; obj != nil {
|
|
return obj
|
|
}
|
|
|
|
// Load the object from the database.
|
|
if _, ok := sdb.nilAccounts[addr]; ok {
|
|
return nil
|
|
}
|
|
account, err := sdb.stateReader.ReadAccountData(addr)
|
|
if err != nil {
|
|
sdb.setErrorUnsafe(err)
|
|
return nil
|
|
}
|
|
if account == nil {
|
|
sdb.nilAccounts[addr] = struct{}{}
|
|
return nil
|
|
}
|
|
|
|
// Insert into the live set.
|
|
obj := newObject(sdb, addr, account, account)
|
|
sdb.setStateObject(obj)
|
|
return obj
|
|
}
|
|
|
|
func (sdb *IntraBlockState) setStateObject(object *stateObject) {
|
|
sdb.stateObjects[object.Address()] = object
|
|
}
|
|
|
|
// Retrieve a state object or create a new state object if nil.
|
|
func (sdb *IntraBlockState) GetOrNewStateObject(addr common.Address) *stateObject {
|
|
stateObject := sdb.getStateObject(addr)
|
|
if stateObject == nil || stateObject.deleted {
|
|
stateObject = sdb.createObject(addr, nil /* previous */)
|
|
}
|
|
return stateObject
|
|
}
|
|
|
|
// createObject creates a new state object. If there is an existing account with
|
|
// the given address, it is overwritten.
|
|
func (sdb *IntraBlockState) createObject(addr common.Address, previous *stateObject) (newobj *stateObject) {
|
|
account := new(accounts.Account)
|
|
if previous != nil {
|
|
account.Balance.Set(&previous.data.Balance)
|
|
account.Initialised = true
|
|
}
|
|
var original *accounts.Account
|
|
if previous == nil {
|
|
original = &accounts.Account{}
|
|
} else {
|
|
original = &previous.original
|
|
}
|
|
account.Root.SetBytes(trie.EmptyRoot[:]) // old storage should be ignored
|
|
newobj = newObject(sdb, addr, account, original)
|
|
if previous != nil && previous.suicided {
|
|
newobj.suicided = true
|
|
}
|
|
newobj.setNonce(0) // sets the object to dirty
|
|
if previous == nil {
|
|
sdb.journal.append(createObjectChange{account: &addr})
|
|
} else {
|
|
sdb.journal.append(resetObjectChange{prev: previous})
|
|
}
|
|
sdb.setStateObject(newobj)
|
|
return newobj
|
|
}
|
|
|
|
// CreateAccount explicitly creates a state object. If a state object with the address
|
|
// already exists the balance is carried over to the new account.
|
|
//
|
|
// 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))
|
|
// 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 (sdb *IntraBlockState) CreateAccount(addr common.Address, contractCreation bool) {
|
|
if sdb.tracer != nil {
|
|
err := sdb.tracer.CaptureAccountRead(addr)
|
|
if sdb.trace && err != nil {
|
|
log.Error("error while CaptureAccountRead", "err", err)
|
|
}
|
|
|
|
err = sdb.tracer.CaptureAccountWrite(addr)
|
|
if sdb.trace && err != nil {
|
|
log.Error("error while CaptureAccountWrite", "err", err)
|
|
}
|
|
}
|
|
|
|
var prevInc uint64
|
|
previous := sdb.getStateObject(addr)
|
|
if contractCreation {
|
|
if previous != nil && previous.suicided {
|
|
prevInc = previous.data.Incarnation
|
|
} else {
|
|
inc, err := sdb.stateReader.ReadAccountIncarnation(addr)
|
|
if sdb.trace && err != nil {
|
|
log.Error("error while ReadAccountIncarnation", "err", err)
|
|
}
|
|
if err == nil {
|
|
prevInc = inc
|
|
}
|
|
}
|
|
}
|
|
|
|
newObj := sdb.createObject(addr, previous)
|
|
|
|
if contractCreation {
|
|
newObj.created = true
|
|
newObj.data.Incarnation = prevInc + 1
|
|
} else {
|
|
newObj.suicided = false
|
|
}
|
|
}
|
|
|
|
// Snapshot returns an identifier for the current revision of the state.
|
|
func (sdb *IntraBlockState) Snapshot() int {
|
|
id := sdb.nextRevisionID
|
|
sdb.nextRevisionID++
|
|
sdb.validRevisions = append(sdb.validRevisions, revision{id, sdb.journal.length()})
|
|
return id
|
|
}
|
|
|
|
// RevertToSnapshot reverts all state changes made since the given revision.
|
|
func (sdb *IntraBlockState) RevertToSnapshot(revid int) {
|
|
// Find the snapshot in the stack of valid snapshots.
|
|
idx := sort.Search(len(sdb.validRevisions), func(i int) bool {
|
|
return sdb.validRevisions[i].id >= revid
|
|
})
|
|
if idx == len(sdb.validRevisions) || sdb.validRevisions[idx].id != revid {
|
|
panic(fmt.Errorf("revision id %v cannot be reverted", revid))
|
|
}
|
|
snapshot := sdb.validRevisions[idx].journalIndex
|
|
|
|
// Replay the journal to undo changes and remove invalidated snapshots
|
|
sdb.journal.revert(sdb, snapshot)
|
|
sdb.validRevisions = sdb.validRevisions[:idx]
|
|
}
|
|
|
|
// GetRefund returns the current value of the refund counter.
|
|
func (sdb *IntraBlockState) GetRefund() uint64 {
|
|
return sdb.refund
|
|
}
|
|
|
|
func updateAccount(EIP158Enabled bool, stateWriter StateWriter, addr common.Address, stateObject *stateObject, isDirty bool) error {
|
|
emptyRemoval := EIP158Enabled && stateObject.empty()
|
|
if stateObject.suicided || (isDirty && emptyRemoval) {
|
|
if err := stateWriter.DeleteAccount(addr, &stateObject.original); err != nil {
|
|
return err
|
|
}
|
|
stateObject.deleted = true
|
|
}
|
|
if isDirty && (stateObject.created || !stateObject.suicided) && !emptyRemoval {
|
|
stateObject.deleted = false
|
|
// Write any contract code associated with the state object
|
|
if stateObject.code != nil && stateObject.dirtyCode {
|
|
if err := stateWriter.UpdateAccountCode(addr, stateObject.data.Incarnation, common.BytesToHash(stateObject.CodeHash()), stateObject.code); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if stateObject.created {
|
|
if err := stateWriter.CreateContract(addr); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if err := stateObject.updateTrie(stateWriter); err != nil {
|
|
return err
|
|
}
|
|
if err := stateWriter.UpdateAccountData(addr, &stateObject.original, &stateObject.data); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// FinalizeTx should be called after every transaction.
|
|
func (sdb *IntraBlockState) FinalizeTx(chainRules params.Rules, stateWriter StateWriter) error {
|
|
for addr := range sdb.journal.dirties {
|
|
stateObject, exist := sdb.stateObjects[addr]
|
|
if !exist {
|
|
// ripeMD is 'touched' at block 1714175, in tx 0x1237f737031e40bcde4a8b7e717b2d15e3ecadfe49bb1bbc71ee9deb09c6fcf2
|
|
// That tx goes out of gas, and although the notion of 'touched' does not exist there, the
|
|
// touch-event will still be recorded in the journal. Since ripeMD is a special snowflake,
|
|
// it will persist in the journal even though the journal is reverted. In this special circumstance,
|
|
// it may exist in `sdb.journal.dirties` but not in `sdb.stateObjects`.
|
|
// Thus, we can safely ignore it here
|
|
continue
|
|
}
|
|
|
|
if err := updateAccount(chainRules.IsEIP158, stateWriter, addr, stateObject, true); err != nil {
|
|
return err
|
|
}
|
|
|
|
sdb.stateObjectsDirty[addr] = struct{}{}
|
|
}
|
|
// Invalidate journal because reverting across transactions is not allowed.
|
|
sdb.clearJournalAndRefund()
|
|
return nil
|
|
}
|
|
|
|
// CommitBlock finalizes the state by removing the self destructed objects
|
|
// and clears the journal as well as the refunds.
|
|
func (sdb *IntraBlockState) CommitBlock(chainRules params.Rules, stateWriter StateWriter) error {
|
|
for addr := range sdb.journal.dirties {
|
|
sdb.stateObjectsDirty[addr] = struct{}{}
|
|
}
|
|
for addr, stateObject := range sdb.stateObjects {
|
|
_, isDirty := sdb.stateObjectsDirty[addr]
|
|
if err := updateAccount(chainRules.IsEIP158, stateWriter, addr, stateObject, isDirty); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
// Invalidate journal because reverting across transactions is not allowed.
|
|
sdb.clearJournalAndRefund()
|
|
return nil
|
|
}
|
|
|
|
// Prepare sets the current transaction hash and index and block hash which is
|
|
// used when the EVM emits new state logs.
|
|
func (sdb *IntraBlockState) Prepare(thash, bhash common.Hash, ti int) {
|
|
sdb.thash = thash
|
|
sdb.bhash = bhash
|
|
sdb.txIndex = ti
|
|
sdb.accessList = newAccessList()
|
|
}
|
|
|
|
// no not lock
|
|
func (sdb *IntraBlockState) clearJournalAndRefund() {
|
|
sdb.journal = newJournal()
|
|
sdb.validRevisions = sdb.validRevisions[:0]
|
|
sdb.refund = 0
|
|
}
|
|
|
|
// 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 Yolov3/Berlin/2929+2930 is applicable at the current number.
|
|
func (sdb *IntraBlockState) PrepareAccessList(sender common.Address, dst *common.Address, precompiles []common.Address, list types.AccessList) {
|
|
sdb.AddAddressToAccessList(sender)
|
|
if dst != nil {
|
|
sdb.AddAddressToAccessList(*dst)
|
|
// If it's a create-tx, the destination will be added inside evm.create
|
|
}
|
|
for _, addr := range precompiles {
|
|
sdb.AddAddressToAccessList(addr)
|
|
}
|
|
for _, el := range list {
|
|
sdb.AddAddressToAccessList(el.Address)
|
|
for _, key := range el.StorageKeys {
|
|
sdb.AddSlotToAccessList(el.Address, key)
|
|
}
|
|
}
|
|
}
|
|
|
|
// AddAddressToAccessList adds the given address to the access list
|
|
func (sdb *IntraBlockState) AddAddressToAccessList(addr common.Address) {
|
|
if sdb.accessList.AddAddress(addr) {
|
|
sdb.journal.append(accessListAddAccountChange{&addr})
|
|
}
|
|
}
|
|
|
|
// AddSlotToAccessList adds the given (address, slot)-tuple to the access list
|
|
func (sdb *IntraBlockState) AddSlotToAccessList(addr common.Address, slot common.Hash) {
|
|
addrMod, slotMod := sdb.accessList.AddSlot(addr, slot)
|
|
if addrMod {
|
|
// In practice, this should not happen, since there is no way to enter the
|
|
// scope of 'address' without having the 'address' become already added
|
|
// to the access list (via call-variant, create, etc).
|
|
// Better safe than sorry, though
|
|
sdb.journal.append(accessListAddAccountChange{&addr})
|
|
}
|
|
if slotMod {
|
|
sdb.journal.append(accessListAddSlotChange{
|
|
address: &addr,
|
|
slot: &slot,
|
|
})
|
|
}
|
|
}
|
|
|
|
// AddressInAccessList returns true if the given address is in the access list.
|
|
func (sdb *IntraBlockState) AddressInAccessList(addr common.Address) bool {
|
|
return sdb.accessList.ContainsAddress(addr)
|
|
}
|
|
|
|
// SlotInAccessList returns true if the given (address, slot)-tuple is in the access list.
|
|
func (sdb *IntraBlockState) SlotInAccessList(addr common.Address, slot common.Hash) (addressPresent bool, slotPresent bool) {
|
|
return sdb.accessList.Contains(addr, slot)
|
|
}
|