plugeth/cmd/evm/internal/t8ntool/transition.go

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// Copyright 2020 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package t8ntool
import (
"encoding/json"
"errors"
"fmt"
"math/big"
"os"
"path"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/consensus/misc/eip1559"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/eth/tracers"
"github.com/ethereum/go-ethereum/eth/tracers/logger"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/tests"
"github.com/urfave/cli/v2"
)
const (
ErrorEVM = 2
ErrorConfig = 3
ErrorMissingBlockhash = 4
ErrorJson = 10
ErrorIO = 11
ErrorRlp = 12
stdinSelector = "stdin"
)
type NumberedError struct {
errorCode int
err error
}
func NewError(errorCode int, err error) *NumberedError {
return &NumberedError{errorCode, err}
}
func (n *NumberedError) Error() string {
return fmt.Sprintf("ERROR(%d): %v", n.errorCode, n.err.Error())
}
func (n *NumberedError) ExitCode() int {
return n.errorCode
}
// compile-time conformance test
var (
_ cli.ExitCoder = (*NumberedError)(nil)
)
type input struct {
Alloc core.GenesisAlloc `json:"alloc,omitempty"`
Env *stEnv `json:"env,omitempty"`
Txs []*txWithKey `json:"txs,omitempty"`
TxRlp string `json:"txsRlp,omitempty"`
}
func Transition(ctx *cli.Context) error {
var getTracer = func(txIndex int, txHash common.Hash) (vm.EVMLogger, error) { return nil, nil }
baseDir, err := createBasedir(ctx)
if err != nil {
return NewError(ErrorIO, fmt.Errorf("failed creating output basedir: %v", err))
}
if ctx.Bool(TraceFlag.Name) { // JSON opcode tracing
// Configure the EVM logger
logConfig := &logger.Config{
DisableStack: ctx.Bool(TraceDisableStackFlag.Name),
EnableMemory: ctx.Bool(TraceEnableMemoryFlag.Name),
EnableReturnData: ctx.Bool(TraceEnableReturnDataFlag.Name),
Debug: true,
}
getTracer = func(txIndex int, txHash common.Hash) (vm.EVMLogger, error) {
traceFile, err := os.Create(path.Join(baseDir, fmt.Sprintf("trace-%d-%v.jsonl", txIndex, txHash.String())))
if err != nil {
return nil, NewError(ErrorIO, fmt.Errorf("failed creating trace-file: %v", err))
}
return &traceWriter{logger.NewJSONLogger(logConfig, traceFile), traceFile}, nil
}
} else if ctx.IsSet(TraceTracerFlag.Name) {
var config json.RawMessage
if ctx.IsSet(TraceTracerConfigFlag.Name) {
config = []byte(ctx.String(TraceTracerConfigFlag.Name))
}
getTracer = func(txIndex int, txHash common.Hash) (vm.EVMLogger, error) {
traceFile, err := os.Create(path.Join(baseDir, fmt.Sprintf("trace-%d-%v.json", txIndex, txHash.String())))
if err != nil {
return nil, NewError(ErrorIO, fmt.Errorf("failed creating trace-file: %v", err))
}
tracer, err := tracers.DefaultDirectory.New(ctx.String(TraceTracerFlag.Name), nil, config)
if err != nil {
return nil, NewError(ErrorConfig, fmt.Errorf("failed instantiating tracer: %w", err))
}
return &traceWriter{tracer, traceFile}, nil
}
}
// We need to load three things: alloc, env and transactions. May be either in
// stdin input or in files.
// Check if anything needs to be read from stdin
var (
prestate Prestate
txIt txIterator // txs to apply
allocStr = ctx.String(InputAllocFlag.Name)
envStr = ctx.String(InputEnvFlag.Name)
txStr = ctx.String(InputTxsFlag.Name)
inputData = &input{}
)
// Figure out the prestate alloc
if allocStr == stdinSelector || envStr == stdinSelector || txStr == stdinSelector {
decoder := json.NewDecoder(os.Stdin)
if err := decoder.Decode(inputData); err != nil {
return NewError(ErrorJson, fmt.Errorf("failed unmarshaling stdin: %v", err))
}
}
if allocStr != stdinSelector {
if err := readFile(allocStr, "alloc", &inputData.Alloc); err != nil {
return err
}
}
prestate.Pre = inputData.Alloc
// Set the block environment
if envStr != stdinSelector {
var env stEnv
if err := readFile(envStr, "env", &env); err != nil {
return err
}
inputData.Env = &env
}
prestate.Env = *inputData.Env
vmConfig := vm.Config{}
// Construct the chainconfig
var chainConfig *params.ChainConfig
if cConf, extraEips, err := tests.GetChainConfig(ctx.String(ForknameFlag.Name)); err != nil {
return NewError(ErrorConfig, fmt.Errorf("failed constructing chain configuration: %v", err))
} else {
chainConfig = cConf
vmConfig.ExtraEips = extraEips
}
// Set the chain id
chainConfig.ChainID = big.NewInt(ctx.Int64(ChainIDFlag.Name))
if txIt, err = loadTransactions(txStr, inputData, prestate.Env, chainConfig); err != nil {
return err
}
if err := applyLondonChecks(&prestate.Env, chainConfig); err != nil {
return err
}
if err := applyShanghaiChecks(&prestate.Env, chainConfig); err != nil {
return err
}
if err := applyMergeChecks(&prestate.Env, chainConfig); err != nil {
return err
}
if err := applyCancunChecks(&prestate.Env, chainConfig); err != nil {
return err
}
// Run the test and aggregate the result
s, result, body, err := prestate.Apply(vmConfig, chainConfig, txIt, ctx.Int64(RewardFlag.Name), getTracer)
if err != nil {
return err
}
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// Dump the execution result
collector := make(Alloc)
s.DumpToCollector(collector, nil)
return dispatchOutput(ctx, baseDir, result, collector, body)
}
func applyLondonChecks(env *stEnv, chainConfig *params.ChainConfig) error {
if !chainConfig.IsLondon(big.NewInt(int64(env.Number))) {
return nil
}
// Sanity check, to not `panic` in state_transition
if env.BaseFee != nil {
// Already set, base fee has precedent over parent base fee.
return nil
}
if env.ParentBaseFee == nil || env.Number == 0 {
return NewError(ErrorConfig, errors.New("EIP-1559 config but missing 'currentBaseFee' in env section"))
}
env.BaseFee = eip1559.CalcBaseFee(chainConfig, &types.Header{
Number: new(big.Int).SetUint64(env.Number - 1),
BaseFee: env.ParentBaseFee,
GasUsed: env.ParentGasUsed,
GasLimit: env.ParentGasLimit,
})
return nil
}
func applyShanghaiChecks(env *stEnv, chainConfig *params.ChainConfig) error {
if !chainConfig.IsShanghai(big.NewInt(int64(env.Number)), env.Timestamp) {
return nil
}
if env.Withdrawals == nil {
return NewError(ErrorConfig, errors.New("Shanghai config but missing 'withdrawals' in env section"))
}
return nil
}
func applyMergeChecks(env *stEnv, chainConfig *params.ChainConfig) error {
isMerged := chainConfig.TerminalTotalDifficulty != nil && chainConfig.TerminalTotalDifficulty.BitLen() == 0
if !isMerged {
// pre-merge: If difficulty was not provided by caller, we need to calculate it.
if env.Difficulty != nil {
// already set
return nil
}
switch {
case env.ParentDifficulty == nil:
return NewError(ErrorConfig, errors.New("currentDifficulty was not provided, and cannot be calculated due to missing parentDifficulty"))
case env.Number == 0:
return NewError(ErrorConfig, errors.New("currentDifficulty needs to be provided for block number 0"))
case env.Timestamp <= env.ParentTimestamp:
return NewError(ErrorConfig, fmt.Errorf("currentDifficulty cannot be calculated -- currentTime (%d) needs to be after parent time (%d)",
env.Timestamp, env.ParentTimestamp))
}
env.Difficulty = calcDifficulty(chainConfig, env.Number, env.Timestamp,
env.ParentTimestamp, env.ParentDifficulty, env.ParentUncleHash)
return nil
}
// post-merge:
// - random must be supplied
// - difficulty must be zero
switch {
case env.Random == nil:
return NewError(ErrorConfig, errors.New("post-merge requires currentRandom to be defined in env"))
case env.Difficulty != nil && env.Difficulty.BitLen() != 0:
return NewError(ErrorConfig, errors.New("post-merge difficulty must be zero (or omitted) in env"))
}
env.Difficulty = nil
return nil
}
func applyCancunChecks(env *stEnv, chainConfig *params.ChainConfig) error {
if !chainConfig.IsCancun(big.NewInt(int64(env.Number)), env.Timestamp) {
env.ParentBeaconBlockRoot = nil // un-set it if it has been set too early
return nil
}
// Post-cancun
// We require EIP-4788 beacon root to be set in the env
if env.ParentBeaconBlockRoot == nil {
return NewError(ErrorConfig, errors.New("post-cancun env requires parentBeaconBlockRoot to be set"))
}
return nil
}
type Alloc map[common.Address]core.GenesisAccount
func (g Alloc) OnRoot(common.Hash) {}
func (g Alloc) OnAccount(addr *common.Address, dumpAccount state.DumpAccount) {
if addr == nil {
return
}
balance, _ := new(big.Int).SetString(dumpAccount.Balance, 0)
var storage map[common.Hash]common.Hash
if dumpAccount.Storage != nil {
storage = make(map[common.Hash]common.Hash)
for k, v := range dumpAccount.Storage {
storage[k] = common.HexToHash(v)
}
}
genesisAccount := core.GenesisAccount{
Code: dumpAccount.Code,
Storage: storage,
Balance: balance,
Nonce: dumpAccount.Nonce,
}
g[*addr] = genesisAccount
}
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// saveFile marshals the object to the given file
func saveFile(baseDir, filename string, data interface{}) error {
b, err := json.MarshalIndent(data, "", " ")
if err != nil {
return NewError(ErrorJson, fmt.Errorf("failed marshalling output: %v", err))
}
location := path.Join(baseDir, filename)
if err = os.WriteFile(location, b, 0644); err != nil {
return NewError(ErrorIO, fmt.Errorf("failed writing output: %v", err))
}
log.Info("Wrote file", "file", location)
return nil
}
// dispatchOutput writes the output data to either stderr or stdout, or to the specified
// files
func dispatchOutput(ctx *cli.Context, baseDir string, result *ExecutionResult, alloc Alloc, body hexutil.Bytes) error {
stdOutObject := make(map[string]interface{})
stdErrObject := make(map[string]interface{})
dispatch := func(baseDir, fName, name string, obj interface{}) error {
switch fName {
case "stdout":
stdOutObject[name] = obj
case "stderr":
stdErrObject[name] = obj
case "":
// don't save
default: // save to file
if err := saveFile(baseDir, fName, obj); err != nil {
return err
}
}
return nil
}
if err := dispatch(baseDir, ctx.String(OutputAllocFlag.Name), "alloc", alloc); err != nil {
return err
}
if err := dispatch(baseDir, ctx.String(OutputResultFlag.Name), "result", result); err != nil {
return err
}
if err := dispatch(baseDir, ctx.String(OutputBodyFlag.Name), "body", body); err != nil {
return err
}
if len(stdOutObject) > 0 {
b, err := json.MarshalIndent(stdOutObject, "", " ")
if err != nil {
return NewError(ErrorJson, fmt.Errorf("failed marshalling output: %v", err))
}
os.Stdout.Write(b)
os.Stdout.WriteString("\n")
}
if len(stdErrObject) > 0 {
b, err := json.MarshalIndent(stdErrObject, "", " ")
if err != nil {
return NewError(ErrorJson, fmt.Errorf("failed marshalling output: %v", err))
}
os.Stderr.Write(b)
os.Stderr.WriteString("\n")
}
return nil
}