231 lines
8.8 KiB
Go
231 lines
8.8 KiB
Go
// Copyright 2021 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 eth
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import (
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"errors"
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"fmt"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/trie"
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)
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// stateAtBlock retrieves the state database associated with a certain block.
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// If no state is locally available for the given block, a number of blocks are
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// attempted to be reexecuted to generate the desired state.
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func (eth *Ethereum) stateAtBlock(block *types.Block, reexec uint64) (statedb *state.StateDB, release func(), err error) {
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// If we have the state fully available, use that
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statedb, err = eth.blockchain.StateAt(block.Root())
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if err == nil {
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return statedb, func() {}, nil
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}
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// Otherwise try to reexec blocks until we find a state or reach our limit
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origin := block.NumberU64()
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database := state.NewDatabaseWithConfig(eth.chainDb, &trie.Config{Cache: 16, Preimages: true})
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for i := uint64(0); i < reexec; i++ {
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if block.NumberU64() == 0 {
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return nil, nil, errors.New("genesis state is missing")
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}
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parent := eth.blockchain.GetBlock(block.ParentHash(), block.NumberU64()-1)
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if parent == nil {
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return nil, nil, fmt.Errorf("missing block %v %d", block.ParentHash(), block.NumberU64()-1)
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}
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block = parent
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statedb, err = state.New(block.Root(), database, nil)
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if err == nil {
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break
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}
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}
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if err != nil {
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switch err.(type) {
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case *trie.MissingNodeError:
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return nil, nil, fmt.Errorf("required historical state unavailable (reexec=%d)", reexec)
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default:
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return nil, nil, err
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}
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}
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// State was available at historical point, regenerate
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var (
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start = time.Now()
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logged time.Time
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parent common.Hash
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)
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defer func() {
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if err != nil && parent != (common.Hash{}) {
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database.TrieDB().Dereference(parent)
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}
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}()
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for block.NumberU64() < origin {
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// Print progress logs if long enough time elapsed
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if time.Since(logged) > 8*time.Second {
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log.Info("Regenerating historical state", "block", block.NumberU64()+1, "target", origin, "remaining", origin-block.NumberU64()-1, "elapsed", time.Since(start))
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logged = time.Now()
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}
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// Retrieve the next block to regenerate and process it
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if block = eth.blockchain.GetBlockByNumber(block.NumberU64() + 1); block == nil {
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return nil, nil, fmt.Errorf("block #%d not found", block.NumberU64()+1)
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}
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_, _, _, err := eth.blockchain.Processor().Process(block, statedb, vm.Config{})
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if err != nil {
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return nil, nil, fmt.Errorf("processing block %d failed: %v", block.NumberU64(), err)
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}
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// Finalize the state so any modifications are written to the trie
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root, err := statedb.Commit(eth.blockchain.Config().IsEIP158(block.Number()))
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if err != nil {
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return nil, nil, err
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}
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statedb, err = state.New(root, database, nil)
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if err != nil {
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return nil, nil, fmt.Errorf("state reset after block %d failed: %v", block.NumberU64(), err)
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}
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database.TrieDB().Reference(root, common.Hash{})
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if parent != (common.Hash{}) {
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database.TrieDB().Dereference(parent)
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}
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parent = root
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}
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nodes, imgs := database.TrieDB().Size()
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log.Info("Historical state regenerated", "block", block.NumberU64(), "elapsed", time.Since(start), "nodes", nodes, "preimages", imgs)
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return statedb, func() { database.TrieDB().Dereference(parent) }, nil
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}
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// statesInRange retrieves a batch of state databases associated with the specific
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// block ranges. If no state is locally available for the given range, a number of
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// blocks are attempted to be reexecuted to generate the ancestor state.
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func (eth *Ethereum) statesInRange(fromBlock, toBlock *types.Block, reexec uint64) (states []*state.StateDB, release func(), err error) {
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statedb, err := eth.blockchain.StateAt(fromBlock.Root())
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if err != nil {
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statedb, _, err = eth.stateAtBlock(fromBlock, reexec)
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}
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if err != nil {
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return nil, nil, err
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}
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states = append(states, statedb.Copy())
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var (
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logged time.Time
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parent common.Hash
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start = time.Now()
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refs = []common.Hash{fromBlock.Root()}
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database = state.NewDatabaseWithConfig(eth.chainDb, &trie.Config{Cache: 16, Preimages: true})
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)
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// Release all resources(including the states referenced by `stateAtBlock`)
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// if error is returned.
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defer func() {
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if err != nil {
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for _, ref := range refs {
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database.TrieDB().Dereference(ref)
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}
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}
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}()
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for i := fromBlock.NumberU64() + 1; i <= toBlock.NumberU64(); i++ {
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// Print progress logs if long enough time elapsed
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if time.Since(logged) > 8*time.Second {
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logged = time.Now()
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log.Info("Regenerating historical state", "block", i, "target", fromBlock.NumberU64(), "remaining", toBlock.NumberU64()-i, "elapsed", time.Since(start))
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}
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// Retrieve the next block to regenerate and process it
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block := eth.blockchain.GetBlockByNumber(i)
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if block == nil {
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return nil, nil, fmt.Errorf("block #%d not found", i)
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}
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_, _, _, err := eth.blockchain.Processor().Process(block, statedb, vm.Config{})
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if err != nil {
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return nil, nil, fmt.Errorf("processing block %d failed: %v", block.NumberU64(), err)
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}
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// Finalize the state so any modifications are written to the trie
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root, err := statedb.Commit(eth.blockchain.Config().IsEIP158(block.Number()))
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if err != nil {
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return nil, nil, err
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}
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statedb, err := eth.blockchain.StateAt(root)
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if err != nil {
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return nil, nil, fmt.Errorf("state reset after block %d failed: %v", block.NumberU64(), err)
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}
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states = append(states, statedb.Copy())
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// Reference the trie twice, once for us, once for the tracer
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database.TrieDB().Reference(root, common.Hash{})
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database.TrieDB().Reference(root, common.Hash{})
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refs = append(refs, root)
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// Dereference all past tries we ourselves are done working with
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if parent != (common.Hash{}) {
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database.TrieDB().Dereference(parent)
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}
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parent = root
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}
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// release is handler to release all states referenced, including
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// the one referenced in `stateAtBlock`.
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release = func() {
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for _, ref := range refs {
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database.TrieDB().Dereference(ref)
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}
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}
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return states, release, nil
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}
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// stateAtTransaction returns the execution environment of a certain transaction.
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func (eth *Ethereum) stateAtTransaction(block *types.Block, txIndex int, reexec uint64) (core.Message, vm.BlockContext, *state.StateDB, func(), error) {
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// Short circuit if it's genesis block.
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if block.NumberU64() == 0 {
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return nil, vm.BlockContext{}, nil, nil, errors.New("no transaction in genesis")
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}
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// Create the parent state database
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parent := eth.blockchain.GetBlock(block.ParentHash(), block.NumberU64()-1)
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if parent == nil {
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return nil, vm.BlockContext{}, nil, nil, fmt.Errorf("parent %#x not found", block.ParentHash())
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}
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statedb, release, err := eth.stateAtBlock(parent, reexec)
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if err != nil {
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return nil, vm.BlockContext{}, nil, nil, err
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}
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if txIndex == 0 && len(block.Transactions()) == 0 {
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return nil, vm.BlockContext{}, statedb, release, nil
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}
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// Recompute transactions up to the target index.
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signer := types.MakeSigner(eth.blockchain.Config(), block.Number())
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for idx, tx := range block.Transactions() {
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// Assemble the transaction call message and return if the requested offset
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msg, _ := tx.AsMessage(signer)
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txContext := core.NewEVMTxContext(msg)
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context := core.NewEVMBlockContext(block.Header(), eth.blockchain, nil)
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if idx == txIndex {
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return msg, context, statedb, release, nil
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}
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// Not yet the searched for transaction, execute on top of the current state
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vmenv := vm.NewEVM(context, txContext, statedb, eth.blockchain.Config(), vm.Config{})
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if _, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(tx.Gas())); err != nil {
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release()
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return nil, vm.BlockContext{}, nil, nil, fmt.Errorf("transaction %#x failed: %v", tx.Hash(), err)
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}
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// Ensure any modifications are committed to the state
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// Only delete empty objects if EIP158/161 (a.k.a Spurious Dragon) is in effect
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statedb.Finalise(vmenv.ChainConfig().IsEIP158(block.Number()))
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}
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release()
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return nil, vm.BlockContext{}, nil, nil, fmt.Errorf("transaction index %d out of range for block %#x", txIndex, block.Hash())
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}
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