131 lines
5.3 KiB
Go
131 lines
5.3 KiB
Go
// Copyright 2015 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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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus"
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"github.com/ethereum/go-ethereum/consensus/misc"
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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/crypto"
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"github.com/ethereum/go-ethereum/params"
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)
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// StateProcessor is a basic Processor, which takes care of transitioning
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// state from one point to another.
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//
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// StateProcessor implements Processor.
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type StateProcessor struct {
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config *params.ChainConfig // Chain configuration options
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bc *BlockChain // Canonical block chain
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engine consensus.Engine // Consensus engine used for block rewards
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}
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// NewStateProcessor initialises a new StateProcessor.
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func NewStateProcessor(config *params.ChainConfig, bc *BlockChain, engine consensus.Engine) *StateProcessor {
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return &StateProcessor{
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config: config,
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bc: bc,
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engine: engine,
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}
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}
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// Process processes the state changes according to the Ethereum rules by running
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// the transaction messages using the statedb and applying any rewards to both
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// the processor (coinbase) and any included uncles.
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//
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// Process returns the receipts and logs accumulated during the process and
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// returns the amount of gas that was used in the process. If any of the
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// transactions failed to execute due to insufficient gas it will return an error.
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func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg vm.Config) (types.Receipts, []*types.Log, *big.Int, error) {
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var (
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receipts types.Receipts
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totalUsedGas = big.NewInt(0)
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header = block.Header()
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allLogs []*types.Log
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gp = new(GasPool).AddGas(block.GasLimit())
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)
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// Mutate the the block and state according to any hard-fork specs
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if p.config.DAOForkSupport && p.config.DAOForkBlock != nil && p.config.DAOForkBlock.Cmp(block.Number()) == 0 {
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misc.ApplyDAOHardFork(statedb)
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}
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// Iterate over and process the individual transactions
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for i, tx := range block.Transactions() {
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statedb.Prepare(tx.Hash(), block.Hash(), i)
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receipt, _, err := ApplyTransaction(p.config, p.bc, nil, gp, statedb, header, tx, totalUsedGas, cfg)
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if err != nil {
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return nil, nil, nil, err
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}
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receipts = append(receipts, receipt)
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allLogs = append(allLogs, receipt.Logs...)
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}
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// Finalize the block, applying any consensus engine specific extras (e.g. block rewards)
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p.engine.Finalize(p.bc, header, statedb, block.Transactions(), block.Uncles(), receipts)
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return receipts, allLogs, totalUsedGas, nil
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}
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// ApplyTransaction attempts to apply a transaction to the given state database
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// and uses the input parameters for its environment. It returns the receipt
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// for the transaction, gas used and an error if the transaction failed,
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// indicating the block was invalid.
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func ApplyTransaction(config *params.ChainConfig, bc *BlockChain, author *common.Address, gp *GasPool, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *big.Int, cfg vm.Config) (*types.Receipt, *big.Int, error) {
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msg, err := tx.AsMessage(types.MakeSigner(config, header.Number))
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if err != nil {
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return nil, nil, err
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}
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// Create a new context to be used in the EVM environment
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context := NewEVMContext(msg, header, bc, author)
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// Create a new environment which holds all relevant information
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// about the transaction and calling mechanisms.
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vmenv := vm.NewEVM(context, statedb, config, cfg)
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// Apply the transaction to the current state (included in the env)
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_, gas, err := ApplyMessage(vmenv, msg, gp)
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if err != nil {
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return nil, nil, err
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}
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// Update the state with pending changes
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var root []byte
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if config.IsMetropolis(header.Number) {
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statedb.Finalise()
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} else {
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root = statedb.IntermediateRoot(config.IsEIP158(header.Number)).Bytes()
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}
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usedGas.Add(usedGas, gas)
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// Create a new receipt for the transaction, storing the intermediate root and gas used by the tx
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// based on the eip phase, we're passing wether the root touch-delete accounts.
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receipt := types.NewReceipt(root, usedGas)
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receipt.TxHash = tx.Hash()
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receipt.GasUsed = new(big.Int).Set(gas)
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// if the transaction created a contract, store the creation address in the receipt.
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if msg.To() == nil {
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receipt.ContractAddress = crypto.CreateAddress(vmenv.Context.Origin, tx.Nonce())
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}
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// Set the receipt logs and create a bloom for filtering
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receipt.Logs = statedb.GetLogs(tx.Hash())
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receipt.Bloom = types.CreateBloom(types.Receipts{receipt})
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return receipt, gas, err
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}
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