/
state_processor.go
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/
state_processor.go
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// Modifications Copyright 2018 The klaytn Authors
// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
//
// This file is derived from core/state_processor.go (2018/06/04).
// Modified and improved for the klaytn development.
package blockchain
import (
"time"
"github.com/klaytn/klaytn/blockchain/state"
"github.com/klaytn/klaytn/blockchain/types"
"github.com/klaytn/klaytn/blockchain/vm"
"github.com/klaytn/klaytn/consensus"
"github.com/klaytn/klaytn/params"
)
// StateProcessor is a basic Processor, which takes care of transitioning
// state from one point to another.
//
// StateProcessor implements Processor.
type StateProcessor struct {
config *params.ChainConfig // Chain configuration options
bc *BlockChain // Canonical block chain
engine consensus.Engine // Consensus engine used for block rewards
}
// ProcessStats includes the time statistics regarding StateProcessor.Process.
type ProcessStats struct {
BeforeApplyTxs time.Time
AfterApplyTxs time.Time
AfterFinalize time.Time
}
// NewStateProcessor initialises a new StateProcessor.
func NewStateProcessor(config *params.ChainConfig, bc *BlockChain, engine consensus.Engine) *StateProcessor {
return &StateProcessor{
config: config,
bc: bc,
engine: engine,
}
}
// Process processes the state changes according to the Klaytn rules by running
// the transaction messages using the statedb and applying any rewards to the processor.
//
// Process returns the receipts and logs accumulated during the process and
// returns the amount of gas that was used in the process. If any of the
// transactions failed to execute due to insufficient gas it will return an error.
func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg vm.Config) (types.Receipts, []*types.Log, uint64, []*vm.InternalTxTrace, ProcessStats, error) {
var (
receipts types.Receipts
usedGas = new(uint64)
header = block.Header()
allLogs []*types.Log
internalTxTraces []*vm.InternalTxTrace
processStats ProcessStats
)
// Enable the opcode computation cost limit
cfg.UseOpcodeComputationCost = true
// Extract author from the header
author, _ := p.bc.Engine().Author(header) // Ignore error, we're past header validation
processStats.BeforeApplyTxs = time.Now()
// Iterate over and process the individual transactions
for i, tx := range block.Transactions() {
statedb.Prepare(tx.Hash(), block.Hash(), i)
receipt, _, internalTxTrace, err := p.bc.ApplyTransaction(p.config, &author, statedb, header, tx, usedGas, &cfg)
if err != nil {
return nil, nil, 0, nil, processStats, err
}
receipts = append(receipts, receipt)
allLogs = append(allLogs, receipt.Logs...)
internalTxTraces = append(internalTxTraces, internalTxTrace)
}
processStats.AfterApplyTxs = time.Now()
// Finalize the block, applying any consensus engine specific extras (e.g. block rewards)
if _, err := p.engine.Finalize(p.bc, header, statedb, block.Transactions(), receipts); err != nil {
return nil, nil, 0, nil, processStats, err
}
processStats.AfterFinalize = time.Now()
return receipts, allLogs, *usedGas, internalTxTraces, processStats, nil
}