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cmd/evm: add b11r tool (#23843)

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evm block-builder (a.k.a b11r) is a utility to help assemble blocks, for use during the test-creation process.
This commit is contained in:
lightclient
2021-11-22 01:25:35 -07:00
committed by GitHub
parent 5d4bcbc14f
commit 441c7f2b0f
26 changed files with 881 additions and 38 deletions
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380
cmd/evm/internal/t8ntool/block.go Normal file
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@ -0,0 +1,380 @@
// Copyright 2021 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"
"errors"
"fmt"
"math/big"
"os"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/consensus/clique"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/rlp"
"gopkg.in/urfave/cli.v1"
)
//go:generate gencodec -type header -field-override headerMarshaling -out gen_header.go
type header struct {
ParentHash common.Hash `json:"parentHash"`
OmmerHash *common.Hash `json:"sha3Uncles"`
Coinbase *common.Address `json:"miner"`
Root common.Hash `json:"stateRoot" gencodec:"required"`
TxHash *common.Hash `json:"transactionsRoot"`
ReceiptHash *common.Hash `json:"receiptsRoot"`
Bloom types.Bloom `json:"logsBloom"`
Difficulty *big.Int `json:"difficulty"`
Number *big.Int `json:"number" gencodec:"required"`
GasLimit uint64 `json:"gasLimit" gencodec:"required"`
GasUsed uint64 `json:"gasUsed"`
Time uint64 `json:"timestamp" gencodec:"required"`
Extra []byte `json:"extraData"`
MixDigest common.Hash `json:"mixHash"`
Nonce *types.BlockNonce `json:"nonce"`
BaseFee *big.Int `json:"baseFeePerGas" rlp:"optional"`
}
type headerMarshaling struct {
Difficulty *math.HexOrDecimal256
Number *math.HexOrDecimal256
GasLimit math.HexOrDecimal64
GasUsed math.HexOrDecimal64
Time math.HexOrDecimal64
Extra hexutil.Bytes
BaseFee *math.HexOrDecimal256
}
type bbInput struct {
Header *header `json:"header,omitempty"`
OmmersRlp []string `json:"ommers,omitempty"`
TxRlp string `json:"txs,omitempty"`
Clique *cliqueInput `json:"clique,omitempty"`
Ethash bool `json:"-"`
EthashDir string `json:"-"`
PowMode ethash.Mode `json:"-"`
Txs []*types.Transaction `json:"-"`
Ommers []*types.Header `json:"-"`
}
type cliqueInput struct {
Key *ecdsa.PrivateKey
Voted *common.Address
Authorize *bool
Vanity common.Hash
}
// UnmarshalJSON implements json.Unmarshaler interface.
func (c *cliqueInput) UnmarshalJSON(input []byte) error {
var x struct {
Key *common.Hash `json:"secretKey"`
Voted *common.Address `json:"voted"`
Authorize *bool `json:"authorize"`
Vanity common.Hash `json:"vanity"`
}
if err := json.Unmarshal(input, &x); err != nil {
return err
}
if x.Key == nil {
return errors.New("missing required field 'secretKey' for cliqueInput")
}
if ecdsaKey, err := crypto.ToECDSA(x.Key[:]); err != nil {
return err
} else {
c.Key = ecdsaKey
}
c.Voted = x.Voted
c.Authorize = x.Authorize
c.Vanity = x.Vanity
return nil
}
// ToBlock converts i into a *types.Block
func (i *bbInput) ToBlock() *types.Block {
header := &types.Header{
ParentHash: i.Header.ParentHash,
UncleHash: types.EmptyUncleHash,
Coinbase: common.Address{},
Root: i.Header.Root,
TxHash: types.EmptyRootHash,
ReceiptHash: types.EmptyRootHash,
Bloom: i.Header.Bloom,
Difficulty: common.Big0,
Number: i.Header.Number,
GasLimit: i.Header.GasLimit,
GasUsed: i.Header.GasUsed,
Time: i.Header.Time,
Extra: i.Header.Extra,
MixDigest: i.Header.MixDigest,
BaseFee: i.Header.BaseFee,
}
// Fill optional values.
if i.Header.OmmerHash != nil {
header.UncleHash = *i.Header.OmmerHash
} else if len(i.Ommers) != 0 {
// Calculate the ommer hash if none is provided and there are ommers to hash
header.UncleHash = types.CalcUncleHash(i.Ommers)
}
if i.Header.Coinbase != nil {
header.Coinbase = *i.Header.Coinbase
}
if i.Header.TxHash != nil {
header.TxHash = *i.Header.TxHash
}
if i.Header.ReceiptHash != nil {
header.ReceiptHash = *i.Header.ReceiptHash
}
if i.Header.Nonce != nil {
header.Nonce = *i.Header.Nonce
}
if header.Difficulty != nil {
header.Difficulty = i.Header.Difficulty
}
return types.NewBlockWithHeader(header).WithBody(i.Txs, i.Ommers)
}
// SealBlock seals the given block using the configured engine.
func (i *bbInput) SealBlock(block *types.Block) (*types.Block, error) {
switch {
case i.Ethash:
return i.sealEthash(block)
case i.Clique != nil:
return i.sealClique(block)
default:
return block, nil
}
}
// sealEthash seals the given block using ethash.
func (i *bbInput) sealEthash(block *types.Block) (*types.Block, error) {
if i.Header.Nonce != nil {
return nil, NewError(ErrorConfig, fmt.Errorf("sealing with ethash will overwrite provided nonce"))
}
ethashConfig := ethash.Config{
PowMode: i.PowMode,
DatasetDir: i.EthashDir,
CacheDir: i.EthashDir,
DatasetsInMem: 1,
DatasetsOnDisk: 2,
CachesInMem: 2,
CachesOnDisk: 3,
}
engine := ethash.New(ethashConfig, nil, true)
defer engine.Close()
// Use a buffered chan for results.
// If the testmode is used, the sealer will return quickly, and complain
// "Sealing result is not read by miner" if it cannot write the result.
results := make(chan *types.Block, 1)
if err := engine.Seal(nil, block, results, nil); err != nil {
panic(fmt.Sprintf("failed to seal block: %v", err))
}
found := <-results
return block.WithSeal(found.Header()), nil
}
// sealClique seals the given block using clique.
func (i *bbInput) sealClique(block *types.Block) (*types.Block, error) {
// If any clique value overwrites an explicit header value, fail
// to avoid silently building a block with unexpected values.
if i.Header.Extra != nil {
return nil, NewError(ErrorConfig, fmt.Errorf("sealing with clique will overwrite provided extra data"))
}
header := block.Header()
if i.Clique.Voted != nil {
if i.Header.Coinbase != nil {
return nil, NewError(ErrorConfig, fmt.Errorf("sealing with clique and voting will overwrite provided coinbase"))
}
header.Coinbase = *i.Clique.Voted
}
if i.Clique.Authorize != nil {
if i.Header.Nonce != nil {
return nil, NewError(ErrorConfig, fmt.Errorf("sealing with clique and voting will overwrite provided nonce"))
}
if *i.Clique.Authorize {
header.Nonce = [8]byte{}
} else {
header.Nonce = [8]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
}
}
// Extra is fixed 32 byte vanity and 65 byte signature
header.Extra = make([]byte, 32+65)
copy(header.Extra[0:32], i.Clique.Vanity.Bytes()[:])
// Sign the seal hash and fill in the rest of the extra data
h := clique.SealHash(header)
sighash, err := crypto.Sign(h[:], i.Clique.Key)
if err != nil {
return nil, err
}
copy(header.Extra[32:], sighash)
block = block.WithSeal(header)
return block, nil
}
// BuildBlock constructs a block from the given inputs.
func BuildBlock(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)
baseDir, err := createBasedir(ctx)
if err != nil {
return NewError(ErrorIO, fmt.Errorf("failed creating output basedir: %v", err))
}
inputData, err := readInput(ctx)
if err != nil {
return err
}
block := inputData.ToBlock()
block, err = inputData.SealBlock(block)
if err != nil {
return err
}
return dispatchBlock(ctx, baseDir, block)
}
func readInput(ctx *cli.Context) (*bbInput, error) {
var (
headerStr = ctx.String(InputHeaderFlag.Name)
ommersStr = ctx.String(InputOmmersFlag.Name)
txsStr = ctx.String(InputTxsRlpFlag.Name)
cliqueStr = ctx.String(SealCliqueFlag.Name)
ethashOn = ctx.Bool(SealEthashFlag.Name)
ethashDir = ctx.String(SealEthashDirFlag.Name)
ethashMode = ctx.String(SealEthashModeFlag.Name)
inputData = &bbInput{}
)
if ethashOn && cliqueStr != "" {
return nil, NewError(ErrorConfig, fmt.Errorf("both ethash and clique sealing specified, only one may be chosen"))
}
if ethashOn {
inputData.Ethash = ethashOn
inputData.EthashDir = ethashDir
switch ethashMode {
case "normal":
inputData.PowMode = ethash.ModeNormal
case "test":
inputData.PowMode = ethash.ModeTest
case "fake":
inputData.PowMode = ethash.ModeFake
default:
return nil, NewError(ErrorConfig, fmt.Errorf("unknown pow mode: %s, supported modes: test, fake, normal", ethashMode))
}
}
if headerStr == stdinSelector || ommersStr == stdinSelector || txsStr == stdinSelector || cliqueStr == stdinSelector {
decoder := json.NewDecoder(os.Stdin)
if err := decoder.Decode(inputData); err != nil {
return nil, NewError(ErrorJson, fmt.Errorf("failed unmarshaling stdin: %v", err))
}
}
if cliqueStr != stdinSelector && cliqueStr != "" {
var clique cliqueInput
if err := readFile(cliqueStr, "clique", &clique); err != nil {
return nil, err
}
inputData.Clique = &clique
}
if headerStr != stdinSelector {
var env header
if err := readFile(headerStr, "header", &env); err != nil {
return nil, err
}
inputData.Header = &env
}
if ommersStr != stdinSelector && ommersStr != "" {
var ommers []string
if err := readFile(ommersStr, "ommers", &ommers); err != nil {
return nil, err
}
inputData.OmmersRlp = ommers
}
if txsStr != stdinSelector {
var txs string
if err := readFile(txsStr, "txs", &txs); err != nil {
return nil, err
}
inputData.TxRlp = txs
}
// Deserialize rlp txs and ommers
var (
ommers = []*types.Header{}
txs = []*types.Transaction{}
)
if inputData.TxRlp != "" {
if err := rlp.DecodeBytes(common.FromHex(inputData.TxRlp), &txs); err != nil {
return nil, NewError(ErrorRlp, fmt.Errorf("unable to decode transaction from rlp data: %v", err))
}
inputData.Txs = txs
}
for _, str := range inputData.OmmersRlp {
type extblock struct {
Header *types.Header
Txs []*types.Transaction
Ommers []*types.Header
}
var ommer *extblock
if err := rlp.DecodeBytes(common.FromHex(str), &ommer); err != nil {
return nil, NewError(ErrorRlp, fmt.Errorf("unable to decode ommer from rlp data: %v", err))
}
ommers = append(ommers, ommer.Header)
}
inputData.Ommers = ommers
return inputData, nil
}
// dispatchOutput writes the output data to either stderr or stdout, or to the specified
// files
func dispatchBlock(ctx *cli.Context, baseDir string, block *types.Block) error {
raw, _ := rlp.EncodeToBytes(block)
type blockInfo struct {
Rlp hexutil.Bytes `json:"rlp"`
Hash common.Hash `json:"hash"`
}
var enc blockInfo
enc.Rlp = raw
enc.Hash = block.Hash()
b, err := json.MarshalIndent(enc, "", " ")
if err != nil {
return NewError(ErrorJson, fmt.Errorf("failed marshalling output: %v", err))
}
switch dest := ctx.String(OutputBlockFlag.Name); dest {
case "stdout":
os.Stdout.Write(b)
os.Stdout.WriteString("\n")
case "stderr":
os.Stderr.Write(b)
os.Stderr.WriteString("\n")
default:
if err := saveFile(baseDir, dest, enc); err != nil {
return err
}
}
return nil
}

41
cmd/evm/internal/t8ntool/flags.go
View File

@ -68,6 +68,14 @@ var (
"\t<file> - into the file <file> ",
Value: "result.json",
}
OutputBlockFlag = cli.StringFlag{
Name: "output.block",
Usage: "Determines where to put the `block` after building.\n" +
"\t`stdout` - into the stdout output\n" +
"\t`stderr` - into the stderr output\n" +
"\t<file> - into the file <file> ",
Value: "block.json",
}
InputAllocFlag = cli.StringFlag{
Name: "input.alloc",
Usage: "`stdin` or file name of where to find the prestate alloc to use.",
@ -81,10 +89,41 @@ var (
InputTxsFlag = cli.StringFlag{
Name: "input.txs",
Usage: "`stdin` or file name of where to find the transactions to apply. " +
"If the file prefix is '.rlp', then the data is interpreted as an RLP list of signed transactions." +
"If the file extension is '.rlp', then the data is interpreted as an RLP list of signed transactions." +
"The '.rlp' format is identical to the output.body format.",
Value: "txs.json",
}
InputHeaderFlag = cli.StringFlag{
Name: "input.header",
Usage: "`stdin` or file name of where to find the block header to use.",
Value: "header.json",
}
InputOmmersFlag = cli.StringFlag{
Name: "input.ommers",
Usage: "`stdin` or file name of where to find the list of ommer header RLPs to use.",
}
InputTxsRlpFlag = cli.StringFlag{
Name: "input.txs",
Usage: "`stdin` or file name of where to find the transactions list in RLP form.",
Value: "txs.rlp",
}
SealCliqueFlag = cli.StringFlag{
Name: "seal.clique",
Usage: "Seal block with Clique. `stdin` or file name of where to find the Clique sealing data.",
}
SealEthashFlag = cli.BoolFlag{
Name: "seal.ethash",
Usage: "Seal block with ethash.",
}
SealEthashDirFlag = cli.StringFlag{
Name: "seal.ethash.dir",
Usage: "Path to ethash DAG. If none exists, a new DAG will be generated.",
}
SealEthashModeFlag = cli.StringFlag{
Name: "seal.ethash.mode",
Usage: "Defines the type and amount of PoW verification an ethash engine makes.",
Value: "normal",
}
RewardFlag = cli.Int64Flag{
Name: "state.reward",
Usage: "Mining reward. Set to -1 to disable",

135
cmd/evm/internal/t8ntool/gen_header.go Normal file
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@ -0,0 +1,135 @@
// Code generated by github.com/fjl/gencodec. DO NOT EDIT.
package t8ntool
import (
"encoding/json"
"errors"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/core/types"
)
var _ = (*headerMarshaling)(nil)
// MarshalJSON marshals as JSON.
func (h header) MarshalJSON() ([]byte, error) {
type header struct {
ParentHash common.Hash `json:"parentHash"`
OmmerHash *common.Hash `json:"sha3Uncles"`
Coinbase *common.Address `json:"miner"`
Root common.Hash `json:"stateRoot" gencodec:"required"`
TxHash *common.Hash `json:"transactionsRoot"`
ReceiptHash *common.Hash `json:"receiptsRoot"`
Bloom types.Bloom `json:"logsBloom"`
Difficulty *math.HexOrDecimal256 `json:"difficulty"`
Number *math.HexOrDecimal256 `json:"number" gencodec:"required"`
GasLimit math.HexOrDecimal64 `json:"gasLimit" gencodec:"required"`
GasUsed math.HexOrDecimal64 `json:"gasUsed"`
Time math.HexOrDecimal64 `json:"timestamp" gencodec:"required"`
Extra hexutil.Bytes `json:"extraData"`
MixDigest common.Hash `json:"mixHash"`
Nonce *types.BlockNonce `json:"nonce"`
BaseFee *math.HexOrDecimal256 `json:"baseFeePerGas" rlp:"optional"`
}
var enc header
enc.ParentHash = h.ParentHash
enc.OmmerHash = h.OmmerHash
enc.Coinbase = h.Coinbase
enc.Root = h.Root
enc.TxHash = h.TxHash
enc.ReceiptHash = h.ReceiptHash
enc.Bloom = h.Bloom
enc.Difficulty = (*math.HexOrDecimal256)(h.Difficulty)
enc.Number = (*math.HexOrDecimal256)(h.Number)
enc.GasLimit = math.HexOrDecimal64(h.GasLimit)
enc.GasUsed = math.HexOrDecimal64(h.GasUsed)
enc.Time = math.HexOrDecimal64(h.Time)
enc.Extra = h.Extra
enc.MixDigest = h.MixDigest
enc.Nonce = h.Nonce
enc.BaseFee = (*math.HexOrDecimal256)(h.BaseFee)
return json.Marshal(&enc)
}
// UnmarshalJSON unmarshals from JSON.
func (h *header) UnmarshalJSON(input []byte) error {
type header struct {
ParentHash *common.Hash `json:"parentHash"`
OmmerHash *common.Hash `json:"sha3Uncles"`
Coinbase *common.Address `json:"miner"`
Root *common.Hash `json:"stateRoot" gencodec:"required"`
TxHash *common.Hash `json:"transactionsRoot"`
ReceiptHash *common.Hash `json:"receiptsRoot"`
Bloom *types.Bloom `json:"logsBloom"`
Difficulty *math.HexOrDecimal256 `json:"difficulty"`
Number *math.HexOrDecimal256 `json:"number" gencodec:"required"`
GasLimit *math.HexOrDecimal64 `json:"gasLimit" gencodec:"required"`
GasUsed *math.HexOrDecimal64 `json:"gasUsed"`
Time *math.HexOrDecimal64 `json:"timestamp" gencodec:"required"`
Extra *hexutil.Bytes `json:"extraData"`
MixDigest *common.Hash `json:"mixHash"`
Nonce *types.BlockNonce `json:"nonce"`
BaseFee *math.HexOrDecimal256 `json:"baseFeePerGas" rlp:"optional"`
}
var dec header
if err := json.Unmarshal(input, &dec); err != nil {
return err
}
if dec.ParentHash != nil {
h.ParentHash = *dec.ParentHash
}
if dec.OmmerHash != nil {
h.OmmerHash = dec.OmmerHash
}
if dec.Coinbase != nil {
h.Coinbase = dec.Coinbase
}
if dec.Root == nil {
return errors.New("missing required field 'stateRoot' for header")
}
h.Root = *dec.Root
if dec.TxHash != nil {
h.TxHash = dec.TxHash
}
if dec.ReceiptHash != nil {
h.ReceiptHash = dec.ReceiptHash
}
if dec.Bloom != nil {
h.Bloom = *dec.Bloom
}
if dec.Difficulty != nil {
h.Difficulty = (*big.Int)(dec.Difficulty)
}
if dec.Number == nil {
return errors.New("missing required field 'number' for header")
}
h.Number = (*big.Int)(dec.Number)
if dec.GasLimit == nil {
return errors.New("missing required field 'gasLimit' for header")
}
h.GasLimit = uint64(*dec.GasLimit)
if dec.GasUsed != nil {
h.GasUsed = uint64(*dec.GasUsed)
}
if dec.Time == nil {
return errors.New("missing required field 'timestamp' for header")
}
h.Time = uint64(*dec.Time)
if dec.Extra != nil {
h.Extra = *dec.Extra
}
if dec.MixDigest != nil {
h.MixDigest = *dec.MixDigest
}
if dec.Nonce != nil {
h.Nonce = dec.Nonce
}
if dec.BaseFee != nil {
h.BaseFee = (*big.Int)(dec.BaseFee)
}
return nil
}

2
cmd/evm/internal/t8ntool/transaction.go
View File

@ -82,7 +82,7 @@ func Transaction(ctx *cli.Context) error {
)
// Construct the chainconfig
if cConf, _, err := tests.GetChainConfig(ctx.String(ForknameFlag.Name)); err != nil {
return NewError(ErrorVMConfig, fmt.Errorf("failed constructing chain configuration: %v", err))
return NewError(ErrorConfig, fmt.Errorf("failed constructing chain configuration: %v", err))
} else {
chainConfig = cConf
}

50
cmd/evm/internal/t8ntool/transition.go
View File

@ -43,11 +43,12 @@ import (
const (
ErrorEVM = 2
ErrorVMConfig = 3
ErrorConfig = 3
ErrorMissingBlockhash = 4
ErrorJson = 10
ErrorIO = 11
ErrorRlp = 12
stdinSelector = "stdin"
)
@ -88,21 +89,14 @@ func Transition(ctx *cli.Context) error {
log.Root().SetHandler(glogger)
var (
err error
tracer vm.EVMLogger
baseDir = ""
err error
tracer vm.EVMLogger
)
var getTracer func(txIndex int, txHash common.Hash) (vm.EVMLogger, 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
}
baseDir, err := createBasedir(ctx)
if err != nil {
return NewError(ErrorIO, fmt.Errorf("failed creating output basedir: %v", err))
}
if ctx.Bool(TraceFlag.Name) {
// Configure the EVM logger
@ -155,29 +149,17 @@ func Transition(ctx *cli.Context) error {
}
}
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))
if err := readFile(allocStr, "alloc", &inputData.Alloc); err != nil {
return 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))
if err := readFile(envStr, "env", &env); err != nil {
return err
}
inputData.Env = &env
}
@ -190,7 +172,7 @@ func Transition(ctx *cli.Context) error {
// 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))
return NewError(ErrorConfig, fmt.Errorf("failed constructing chain configuration: %v", err))
} else {
chainConfig = cConf
vmConfig.ExtraEips = extraEips
@ -254,18 +236,18 @@ func Transition(ctx *cli.Context) error {
// Sanity check, to not `panic` in state_transition
if chainConfig.IsLondon(big.NewInt(int64(prestate.Env.Number))) {
if prestate.Env.BaseFee == nil {
return NewError(ErrorVMConfig, errors.New("EIP-1559 config but missing 'currentBaseFee' in env section"))
return NewError(ErrorConfig, errors.New("EIP-1559 config but missing 'currentBaseFee' in env section"))
}
}
if env := prestate.Env; env.Difficulty == nil {
// If difficulty was not provided by caller, we need to calculate it.
switch {
case env.ParentDifficulty == nil:
return NewError(ErrorVMConfig, errors.New("currentDifficulty was not provided, and cannot be calculated due to missing parentDifficulty"))
return NewError(ErrorConfig, errors.New("currentDifficulty was not provided, and cannot be calculated due to missing parentDifficulty"))
case env.Number == 0:
return NewError(ErrorVMConfig, errors.New("currentDifficulty needs to be provided for block number 0"))
return NewError(ErrorConfig, errors.New("currentDifficulty needs to be provided for block number 0"))
case env.Timestamp <= env.ParentTimestamp:
return NewError(ErrorVMConfig, fmt.Errorf("currentDifficulty cannot be calculated -- currentTime (%d) needs to be after parent time (%d)",
return NewError(ErrorConfig, fmt.Errorf("currentDifficulty cannot be calculated -- currentTime (%d) needs to be after parent time (%d)",
env.Timestamp, env.ParentTimestamp))
}
prestate.Env.Difficulty = calcDifficulty(chainConfig, env.Number, env.Timestamp,

54
cmd/evm/internal/t8ntool/utils.go Normal file
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@ -0,0 +1,54 @@
// Copyright 2021 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"
"fmt"
"os"
"gopkg.in/urfave/cli.v1"
)
// readFile reads the json-data in the provided path and marshals into dest.
func readFile(path, desc string, dest interface{}) error {
inFile, err := os.Open(path)
if err != nil {
return NewError(ErrorIO, fmt.Errorf("failed reading %s file: %v", desc, err))
}
defer inFile.Close()
decoder := json.NewDecoder(inFile)
if err := decoder.Decode(dest); err != nil {
return NewError(ErrorJson, fmt.Errorf("failed unmarshaling %s file: %v", desc, err))
}
return nil
}
// createBasedir makes sure the basedir exists, if user specified one.
func createBasedir(ctx *cli.Context) (string, error) {
baseDir := ""
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 "", err
}
baseDir = base
}
}
return baseDir, nil
}