github.com/cryptotooltop/go-ethereum@v0.0.0-20231103184714-151d1922f3e5/les/state_accessor.go (about) 1 // Copyright 2021 The go-ethereum Authors 2 // This file is part of the go-ethereum library. 3 // 4 // The go-ethereum library is free software: you can redistribute it and/or modify 5 // it under the terms of the GNU Lesser General Public License as published by 6 // the Free Software Foundation, either version 3 of the License, or 7 // (at your option) any later version. 8 // 9 // The go-ethereum library is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU Lesser General Public License for more details. 13 // 14 // You should have received a copy of the GNU Lesser General Public License 15 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. 16 17 package les 18 19 import ( 20 "context" 21 "errors" 22 "fmt" 23 24 "github.com/scroll-tech/go-ethereum/core" 25 "github.com/scroll-tech/go-ethereum/core/state" 26 "github.com/scroll-tech/go-ethereum/core/types" 27 "github.com/scroll-tech/go-ethereum/core/vm" 28 "github.com/scroll-tech/go-ethereum/light" 29 "github.com/scroll-tech/go-ethereum/rollup/fees" 30 ) 31 32 // stateAtBlock retrieves the state database associated with a certain block. 33 func (leth *LightEthereum) stateAtBlock(ctx context.Context, block *types.Block, reexec uint64) (*state.StateDB, error) { 34 return light.NewState(ctx, block.Header(), leth.odr), nil 35 } 36 37 // stateAtTransaction returns the execution environment of a certain transaction. 38 func (leth *LightEthereum) stateAtTransaction(ctx context.Context, block *types.Block, txIndex int, reexec uint64) (core.Message, vm.BlockContext, *state.StateDB, error) { 39 // Short circuit if it's genesis block. 40 if block.NumberU64() == 0 { 41 return nil, vm.BlockContext{}, nil, errors.New("no transaction in genesis") 42 } 43 // Create the parent state database 44 parent, err := leth.blockchain.GetBlock(ctx, block.ParentHash(), block.NumberU64()-1) 45 if err != nil { 46 return nil, vm.BlockContext{}, nil, err 47 } 48 statedb, err := leth.stateAtBlock(ctx, parent, reexec) 49 if err != nil { 50 return nil, vm.BlockContext{}, nil, err 51 } 52 if txIndex == 0 && len(block.Transactions()) == 0 { 53 return nil, vm.BlockContext{}, statedb, nil 54 } 55 // Recompute transactions up to the target index. 56 signer := types.MakeSigner(leth.blockchain.Config(), block.Number()) 57 for idx, tx := range block.Transactions() { 58 // Assemble the transaction call message and return if the requested offset 59 msg, _ := tx.AsMessage(signer, block.BaseFee()) 60 txContext := core.NewEVMTxContext(msg) 61 context := core.NewEVMBlockContext(block.Header(), leth.blockchain, leth.blockchain.Config(), nil) 62 statedb.Prepare(tx.Hash(), idx) 63 if idx == txIndex { 64 return msg, context, statedb, nil 65 } 66 // Not yet the searched for transaction, execute on top of the current state 67 vmenv := vm.NewEVM(context, txContext, statedb, leth.blockchain.Config(), vm.Config{}) 68 l1DataFee, err := fees.CalculateL1DataFee(tx, statedb) 69 if err != nil { 70 return nil, vm.BlockContext{}, nil, fmt.Errorf("transaction %#x failed: %v", tx.Hash(), err) 71 } 72 if _, err = core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(tx.Gas()), l1DataFee); err != nil { 73 return nil, vm.BlockContext{}, nil, fmt.Errorf("transaction %#x failed: %v", tx.Hash(), err) 74 } 75 // Ensure any modifications are committed to the state 76 // Only delete empty objects if EIP158/161 (a.k.a Spurious Dragon) is in effect 77 statedb.Finalise(vmenv.ChainConfig().IsEIP158(block.Number())) 78 } 79 return nil, vm.BlockContext{}, nil, fmt.Errorf("transaction index %d out of range for block %#x", txIndex, block.Hash()) 80 }