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74 lines
3.2 KiB
74 lines
3.2 KiB
5 months ago
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// Copyright 2024 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 core
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import (
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/lru"
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"github.com/ethereum/go-ethereum/consensus/beacon"
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"github.com/ethereum/go-ethereum/consensus/ethash"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/stateless"
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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/params"
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"github.com/ethereum/go-ethereum/trie"
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"github.com/ethereum/go-ethereum/triedb"
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)
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// ExecuteStateless runs a stateless execution based on a witness, verifies
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// everything it can locally and returns the two computed fields that need the
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// other side to explicitly check.
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//
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// This method is a bit of a sore thumb here, but:
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// - It cannot be placed in core/stateless, because state.New prodces a circular dep
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// - It cannot be placed outside of core, because it needs to construct a dud headerchain
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//
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// TODO(karalabe): Would be nice to resolve both issues above somehow and move it.
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func ExecuteStateless(config *params.ChainConfig, witness *stateless.Witness) (common.Hash, common.Hash, error) {
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// Create and populate the state database to serve as the stateless backend
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memdb := witness.MakeHashDB()
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db, err := state.New(witness.Root(), state.NewDatabaseWithConfig(memdb, triedb.HashDefaults), nil)
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if err != nil {
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return common.Hash{}, common.Hash{}, err
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}
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// Create a blockchain that is idle, but can be used to access headers through
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chain := &HeaderChain{
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config: config,
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chainDb: memdb,
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headerCache: lru.NewCache[common.Hash, *types.Header](256),
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engine: beacon.New(ethash.NewFaker()),
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}
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processor := NewStateProcessor(config, chain)
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validator := NewBlockValidator(config, nil) // No chain, we only validate the state, not the block
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// Run the stateless blocks processing and self-validate certain fields
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receipts, _, usedGas, err := processor.Process(witness.Block, db, vm.Config{})
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if err != nil {
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return common.Hash{}, common.Hash{}, err
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}
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if err = validator.ValidateState(witness.Block, db, receipts, usedGas, true); err != nil {
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return common.Hash{}, common.Hash{}, err
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}
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// Almost everything validated, but receipt and state root needs to be returned
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receiptRoot := types.DeriveSha(receipts, trie.NewStackTrie(nil))
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stateRoot := db.IntermediateRoot(config.IsEIP158(witness.Block.Number()))
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return receiptRoot, stateRoot, nil
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}
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