mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2024-12-24 20:47:16 +00:00
bbc4ea4ae8
The run loop, which previously contained custom opcode executes have been removed and has been simplified to a few checks. Each operation consists of 4 elements: execution function, gas cost function, stack validation function and memory size function. The execution function implements the operation's runtime behaviour, the gas cost function implements the operation gas costs function and greatly depends on the memory and stack, the stack validation function validates the stack and makes sure that enough items can be popped off and pushed on and the memory size function calculates the memory required for the operation and returns it. This commit also allows the EVM to go unmetered. This is helpful for offline operations such as contract calls.
149 lines
5.5 KiB
Go
149 lines
5.5 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/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/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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"github.com/ethereum/go-ethereum/params"
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)
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var (
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big8 = big.NewInt(8)
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big32 = big.NewInt(32)
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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
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bc *BlockChain
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}
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// NewStateProcessor initialises a new StateProcessor.
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func NewStateProcessor(config *params.ChainConfig, bc *BlockChain) *StateProcessor {
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return &StateProcessor{
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config: config,
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bc: bc,
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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, vm.Logs, *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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err error
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header = block.Header()
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allLogs vm.Logs
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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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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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//fmt.Println("tx:", i)
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statedb.StartRecord(tx.Hash(), block.Hash(), i)
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receipt, _, err := ApplyTransaction(p.config, p.bc, 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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AccumulateRewards(statedb, header, block.Uncles())
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return receipts, allLogs, totalUsedGas, err
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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, 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)
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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, vm.Config{})
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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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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(statedb.IntermediateRoot(config.IsEIP158(header.Number)).Bytes(), 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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glog.V(logger.Debug).Infoln(receipt)
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return receipt, gas, err
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}
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// AccumulateRewards credits the coinbase of the given block with the
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// mining reward. The total reward consists of the static block reward
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// and rewards for included uncles. The coinbase of each uncle block is
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// also rewarded.
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func AccumulateRewards(statedb *state.StateDB, header *types.Header, uncles []*types.Header) {
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reward := new(big.Int).Set(BlockReward)
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r := new(big.Int)
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for _, uncle := range uncles {
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r.Add(uncle.Number, big8)
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r.Sub(r, header.Number)
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r.Mul(r, BlockReward)
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r.Div(r, big8)
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statedb.AddBalance(uncle.Coinbase, r)
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r.Div(BlockReward, big32)
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reward.Add(reward, r)
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}
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statedb.AddBalance(header.Coinbase, reward)
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}
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