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transition.go
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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 (
"crypto/ecdsa"
"encoding/json"
"fmt"
"io/ioutil"
"math/big"
"os"
"path"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"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/crypto"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/tests"
"gopkg.in/urfave/cli.v1"
)
const (
ErrorEVM = 2
ErrorVMConfig = 3
ErrorMissingBlockhash = 4
ErrorJson = 10
ErrorIO = 11
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) Code() int {
return n.errorCode
}
type input struct {
Alloc core.GenesisAlloc `json:"alloc,omitempty"`
Env *stEnv `json:"env,omitempty"`
Txs []*txWithKey `json:"txs,omitempty"`
}
func Main(ctx *cli.Context) error {
// Configure the go-ethereum logger
glogger := log.NewGlogHandler(log.StreamHandler(os.Stderr, log.TerminalFormat(false)))
glogger.Verbosity(log.Lvl(ctx.Int(VerbosityFlag.Name)))
log.Root().SetHandler(glogger)
var (
err error
tracer vm.Tracer
baseDir = ""
)
var getTracer func(txIndex int, txHash common.Hash) (vm.Tracer, error)
// If user specified a basedir, make sure it exists
if ctx.IsSet(OutputBasedir.Name) {
if base := ctx.String(OutputBasedir.Name); len(base) > 0 {
err := os.MkdirAll(base, 0755) // //rw-r--r--
if err != nil {
return NewError(ErrorIO, fmt.Errorf("failed creating output basedir: %v", err))
}
baseDir = base
}
}
if ctx.Bool(TraceFlag.Name) {
// Configure the EVM logger
logConfig := &vm.LogConfig{
DisableStack: ctx.Bool(TraceDisableStackFlag.Name),
DisableMemory: ctx.Bool(TraceDisableMemoryFlag.Name),
DisableReturnData: ctx.Bool(TraceDisableReturnDataFlag.Name),
Debug: true,
}
var prevFile *os.File
// This one closes the last file
defer func() {
if prevFile != nil {
prevFile.Close()
}
}()
getTracer = func(txIndex int, txHash common.Hash) (vm.Tracer, error) {
if prevFile != nil {
prevFile.Close()
}
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))
}
prevFile = traceFile
return vm.NewJSONLogger(logConfig, traceFile), nil
}
} else {
getTracer = func(txIndex int, txHash common.Hash) (tracer vm.Tracer, err error) {
return nil, 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
txs types.Transactions // 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)
decoder.Decode(inputData)
}
if allocStr != stdinSelector {
inFile, err := os.Open(allocStr)
if err != nil {
return NewError(ErrorIO, fmt.Errorf("failed reading alloc file: %v", err))
}
defer inFile.Close()
decoder := json.NewDecoder(inFile)
if err := decoder.Decode(&inputData.Alloc); err != nil {
return NewError(ErrorJson, fmt.Errorf("Failed unmarshaling alloc-file: %v", err))
}
}
prestate.Pre = inputData.Alloc
// Set the block environment
if envStr != stdinSelector {
inFile, err := os.Open(envStr)
if err != nil {
return NewError(ErrorIO, fmt.Errorf("failed reading env file: %v", err))
}
defer inFile.Close()
decoder := json.NewDecoder(inFile)
var env stEnv
if err := decoder.Decode(&env); err != nil {
return NewError(ErrorJson, fmt.Errorf("Failed unmarshaling env-file: %v", err))
}
inputData.Env = &env
}
prestate.Env = *inputData.Env
vmConfig := vm.Config{
Tracer: tracer,
Debug: (tracer != nil),
}
// Construct the chainconfig
var chainConfig *params.ChainConfig
if cConf, extraEips, err := tests.GetChainConfig(ctx.String(ForknameFlag.Name)); err != nil {
return NewError(ErrorVMConfig, 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))
var txsWithKeys []*txWithKey
if txStr != stdinSelector {
inFile, err := os.Open(txStr)
if err != nil {
return NewError(ErrorIO, fmt.Errorf("failed reading txs file: %v", err))
}
defer inFile.Close()
decoder := json.NewDecoder(inFile)
if err := decoder.Decode(&txsWithKeys); err != nil {
return NewError(ErrorJson, fmt.Errorf("Failed unmarshaling txs-file: %v", err))
}
} else {
txsWithKeys = inputData.Txs
}
// We may have to sign the transactions.
signer := types.MakeSigner(chainConfig, big.NewInt(int64(prestate.Env.Number)))
if txs, err = signUnsignedTransactions(txsWithKeys, signer); err != nil {
return NewError(ErrorJson, fmt.Errorf("Failed signing transactions: %v", err))
}
// Iterate over all the tests, run them and aggregate the results
// Run the test and aggregate the result
state, result, err := prestate.Apply(vmConfig, chainConfig, txs, ctx.Int64(RewardFlag.Name), getTracer)
if err != nil {
return err
}
body, _ := rlp.EncodeToBytes(txs)
// Dump the excution result
collector := make(Alloc)
state.DumpToCollector(collector, false, false, false, nil, -1)
return dispatchOutput(ctx, baseDir, result, collector, body)
}
// txWithKey is a helper-struct, to allow us to use the types.Transaction along with
// a `secretKey`-field, for input
type txWithKey struct {
key *ecdsa.PrivateKey
tx *types.Transaction
}
func (t *txWithKey) UnmarshalJSON(input []byte) error {
// Read the secretKey, if present
type sKey struct {
Key *common.Hash `json:"secretKey"`
}
var key sKey
if err := json.Unmarshal(input, &key); err != nil {
return err
}
if key.Key != nil {
k := key.Key.Hex()[2:]
if ecdsaKey, err := crypto.HexToECDSA(k); err != nil {
return err
} else {
t.key = ecdsaKey
}
}
// Now, read the transaction itself
var tx types.Transaction
if err := json.Unmarshal(input, &tx); err != nil {
return err
}
t.tx = &tx
return nil
}
// signUnsignedTransactions converts the input txs to canonical transactions.
//
// The transactions can have two forms, either
// 1. unsigned or
// 2. signed
// For (1), r, s, v, need so be zero, and the `secretKey` needs to be set.
// If so, we sign it here and now, with the given `secretKey`
// If the condition above is not met, then it's considered a signed transaction.
//
// To manage this, we read the transactions twice, first trying to read the secretKeys,
// and secondly to read them with the standard tx json format
func signUnsignedTransactions(txs []*txWithKey, signer types.Signer) (types.Transactions, error) {
var signedTxs []*types.Transaction
for i, txWithKey := range txs {
tx := txWithKey.tx
key := txWithKey.key
v, r, s := tx.RawSignatureValues()
if key != nil && v.BitLen()+r.BitLen()+s.BitLen() == 0 {
// This transaction needs to be signed
signed, err := types.SignTx(tx, signer, key)
if err != nil {
return nil, NewError(ErrorJson, fmt.Errorf("Tx %d: failed to sign tx: %v", i, err))
}
signedTxs = append(signedTxs, signed)
} else {
// Already signed
signedTxs = append(signedTxs, tx)
}
}
return signedTxs, nil
}
type Alloc map[common.Address]core.GenesisAccount
func (g Alloc) OnRoot(common.Hash) {}
func (g Alloc) OnAccount(addr common.Address, dumpAccount state.DumpAccount) {
balance, _ := new(big.Int).SetString(dumpAccount.Balance, 10)
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: common.FromHex(dumpAccount.Code),
Storage: storage,
Balance: balance,
Nonce: dumpAccount.Nonce,
}
g[addr] = genesisAccount
}
// saveFile marshalls 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 = ioutil.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)
}
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)
}
return nil
}