/
utils.go
813 lines (723 loc) · 17.3 KB
/
utils.go
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package types
import (
"bytes"
"encoding/hex"
"fmt"
abci "github.com/evoblockchain/evochain/libs/tendermint/abci/types"
"math/big"
"math/bits"
"strings"
"sync"
"github.com/tendermint/go-amino"
ethcmn "github.com/ethereum/go-ethereum/common"
ethtypes "github.com/ethereum/go-ethereum/core/types"
ethcrypto "github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/rlp"
"github.com/evoblockchain/evochain/app/crypto/ethsecp256k1"
"github.com/pkg/errors"
"golang.org/x/crypto/sha3"
)
type KV struct {
Key []byte `json:"key"`
Value []byte `json:"value"`
}
// MarshalToAmino encode KV data to amino bytes
func (k *KV) MarshalToAmino(cdc *amino.Codec) ([]byte, error) {
var buf bytes.Buffer
var err error
fieldKeysType := [2]byte{1<<3 | 2, 2<<3 | 2}
for pos := 1; pos <= 2; pos++ {
switch pos {
case 1:
if len(k.Key) == 0 {
break
}
err = buf.WriteByte(fieldKeysType[pos-1])
if err != nil {
return nil, err
}
err = amino.EncodeByteSliceToBuffer(&buf, k.Key)
if err != nil {
return nil, err
}
case 2:
if len(k.Value) == 0 {
break
}
err = buf.WriteByte(fieldKeysType[pos-1])
if err != nil {
return nil, err
}
err = amino.EncodeByteSliceToBuffer(&buf, k.Value)
if err != nil {
return nil, err
}
default:
panic("unreachable")
}
}
return buf.Bytes(), nil
}
// UnmarshalFromAmino unmarshal amino bytes to this object
func (k *KV) UnmarshalFromAmino(_ *amino.Codec, data []byte) error {
var dataLen uint64 = 0
var subData []byte
for {
data = data[dataLen:]
if len(data) == 0 {
break
}
pos, pbType, err := amino.ParseProtoPosAndTypeMustOneByte(data[0])
if err != nil {
return err
}
data = data[1:]
if pbType == amino.Typ3_ByteLength {
var n int
dataLen, n, _ = amino.DecodeUvarint(data)
data = data[n:]
if len(data) < int(dataLen) {
return errors.New("not enough data")
}
subData = data[:dataLen]
}
switch pos {
case 1:
k.Key = make([]byte, len(subData))
copy(k.Key, subData)
case 2:
k.Value = make([]byte, len(subData))
copy(k.Value, subData)
default:
return fmt.Errorf("unexpect feild num %d", pos)
}
}
return nil
}
// GenerateEthAddress generates an Ethereum address.
func GenerateEthAddress() ethcmn.Address {
priv, err := ethsecp256k1.GenerateKey()
if err != nil {
panic(err)
}
return ethcrypto.PubkeyToAddress(priv.ToECDSA().PublicKey)
}
// ValidateSigner attempts to validate a signer for a given slice of bytes over
// which a signature and signer is given. An error is returned if address
// derived from the signature and bytes signed does not match the given signer.
func ValidateSigner(signBytes, sig []byte, signer ethcmn.Address) error {
pk, err := ethcrypto.SigToPub(signBytes, sig)
if err != nil {
return errors.Wrap(err, "failed to derive public key from signature")
} else if ethcrypto.PubkeyToAddress(*pk) != signer {
return fmt.Errorf("invalid signature for signer: %s", signer)
}
return nil
}
func rlpHash(x interface{}) (hash ethcmn.Hash) {
hasher := sha3.NewLegacyKeccak256()
_ = rlp.Encode(hasher, x)
_ = hasher.Sum(hash[:0])
return hash
}
func rlpHashTo(x interface{}, hash *ethcmn.Hash) {
hasher := keccakStatePool.Get().(ethcrypto.KeccakState)
defer keccakStatePool.Put(hasher)
hasher.Reset()
_ = rlp.Encode(hasher, x)
hasher.Read(hash[:])
return
}
// ResultData represents the data returned in an sdk.Result
type ResultData struct {
ContractAddress ethcmn.Address `json:"contract_address"`
Bloom ethtypes.Bloom `json:"bloom"`
Logs []*ethtypes.Log `json:"logs"`
Ret []byte `json:"ret"`
TxHash ethcmn.Hash `json:"tx_hash"`
}
func UnmarshalEthLogFromAmino(data []byte) (*ethtypes.Log, error) {
var dataLen uint64 = 0
var subData []byte
log := ðtypes.Log{}
for {
data = data[dataLen:]
if len(data) == 0 {
break
}
pos, aminoType, err := amino.ParseProtoPosAndTypeMustOneByte(data[0])
if err != nil {
return nil, err
}
data = data[1:]
if aminoType == amino.Typ3_ByteLength {
var n int
dataLen, n, err = amino.DecodeUvarint(data)
if err != nil {
return nil, err
}
data = data[n:]
if len(data) < int(dataLen) {
return nil, fmt.Errorf("invalid data length: %d", dataLen)
}
subData = data[:dataLen]
}
switch pos {
case 1:
if int(dataLen) != ethcmn.AddressLength {
return nil, fmt.Errorf("invalid address length: %d", dataLen)
}
copy(log.Address[:], subData)
case 2:
if int(dataLen) != ethcmn.HashLength {
return nil, fmt.Errorf("invalid topic hash length: %d", dataLen)
}
var hash ethcmn.Hash
copy(hash[:], subData)
log.Topics = append(log.Topics, hash)
case 3:
log.Data = make([]byte, dataLen)
copy(log.Data, subData)
case 4:
var n int
log.BlockNumber, n, err = amino.DecodeUvarint(data)
if err != nil {
return nil, err
}
dataLen = uint64(n)
case 5:
if int(dataLen) != ethcmn.HashLength {
return nil, fmt.Errorf("invalid topic hash length: %d", dataLen)
}
copy(log.TxHash[:], subData)
case 6:
var n int
var uv uint64
uv, n, err = amino.DecodeUvarint(data)
log.TxIndex = uint(uv)
if err != nil {
return nil, err
}
dataLen = uint64(n)
case 7:
if int(dataLen) != ethcmn.HashLength {
return nil, fmt.Errorf("invalid topic hash length: %d", dataLen)
}
copy(log.BlockHash[:], subData)
case 8:
var n int
var uv uint64
uv, n, err = amino.DecodeUvarint(data)
log.Index = uint(uv)
if err != nil {
return nil, err
}
dataLen = uint64(n)
case 9:
if data[0] == 0 {
log.Removed = false
} else if data[0] == 1 {
log.Removed = true
} else {
return nil, fmt.Errorf("invalid removed flag: %d", data[0])
}
dataLen = 1
}
}
return log, nil
}
var ethLogBufferPool = amino.NewBufferPool()
func MarshalEthLogToAmino(log *ethtypes.Log) ([]byte, error) {
if log == nil {
return nil, nil
}
var buf = ethLogBufferPool.Get()
defer ethLogBufferPool.Put(buf)
fieldKeysType := [9]byte{1<<3 | 2, 2<<3 | 2, 3<<3 | 2, 4 << 3, 5<<3 | 2, 6 << 3, 7<<3 | 2, 8 << 3, 9 << 3}
for pos := 1; pos < 10; pos++ {
lBeforeKey := buf.Len()
var noWrite bool
err := buf.WriteByte(fieldKeysType[pos-1])
if err != nil {
return nil, err
}
switch pos {
case 1:
err := buf.WriteByte(byte(ethcmn.AddressLength))
if err != nil {
return nil, err
}
_, err = buf.Write(log.Address.Bytes())
if err != nil {
return nil, err
}
case 2:
topicsLen := len(log.Topics)
if topicsLen == 0 {
noWrite = true
break
}
err = buf.WriteByte(byte(ethcmn.HashLength))
if err != nil {
return nil, err
}
_, err = buf.Write(log.Topics[0].Bytes())
if err != nil {
return nil, err
}
for i := 1; i < topicsLen; i++ {
err = buf.WriteByte(fieldKeysType[pos-1])
if err != nil {
return nil, err
}
err = buf.WriteByte(byte(ethcmn.HashLength))
if err != nil {
return nil, err
}
_, err = buf.Write(log.Topics[i].Bytes())
if err != nil {
return nil, err
}
}
case 3:
dataLen := len(log.Data)
if dataLen == 0 {
noWrite = true
break
}
err = amino.EncodeUvarintToBuffer(buf, uint64(dataLen))
if err != nil {
return nil, err
}
_, err = buf.Write(log.Data)
if err != nil {
return nil, err
}
case 4:
if log.BlockNumber == 0 {
noWrite = true
break
}
err = amino.EncodeUvarintToBuffer(buf, log.BlockNumber)
if err != nil {
return nil, err
}
case 5:
err := buf.WriteByte(byte(ethcmn.HashLength))
if err != nil {
return nil, err
}
_, err = buf.Write(log.TxHash.Bytes())
if err != nil {
return nil, err
}
case 6:
if log.TxIndex == 0 {
noWrite = true
break
}
err := amino.EncodeUvarintToBuffer(buf, uint64(log.TxIndex))
if err != nil {
return nil, err
}
case 7:
err := buf.WriteByte(byte(ethcmn.HashLength))
if err != nil {
return nil, err
}
_, err = buf.Write(log.BlockHash.Bytes())
if err != nil {
return nil, err
}
case 8:
if log.Index == 0 {
noWrite = true
break
}
err := amino.EncodeUvarintToBuffer(buf, uint64(log.Index))
if err != nil {
return nil, err
}
case 9:
if log.Removed {
err = buf.WriteByte(byte(1))
if err != nil {
return nil, err
}
} else {
noWrite = true
break
}
default:
panic("unreachable")
}
if noWrite {
buf.Truncate(lBeforeKey)
}
}
return amino.GetBytesBufferCopy(buf), nil
}
func (rd *ResultData) UnmarshalFromAmino(_ *amino.Codec, data []byte) error {
var dataLen uint64 = 0
var subData []byte
for {
data = data[dataLen:]
if len(data) == 0 {
break
}
pos, aminoType, err := amino.ParseProtoPosAndTypeMustOneByte(data[0])
if err != nil {
return err
}
if aminoType != amino.Typ3_ByteLength {
return fmt.Errorf("unexpect proto type %d", aminoType)
}
data = data[1:]
var n int
dataLen, n, err = amino.DecodeUvarint(data)
if err != nil {
return err
}
data = data[n:]
if len(data) < int(dataLen) {
return errors.New("invalid data len")
}
subData = data[:dataLen]
switch pos {
case 1:
if int(dataLen) != ethcmn.AddressLength {
return fmt.Errorf("invalid contract address length: %d", dataLen)
}
copy(rd.ContractAddress[:], subData)
case 2:
if int(dataLen) != ethtypes.BloomByteLength {
return fmt.Errorf("invalid bloom length: %d", dataLen)
}
copy(rd.Bloom[:], subData)
case 3:
var log *ethtypes.Log
if dataLen == 0 {
log, err = nil, nil
} else {
log, err = UnmarshalEthLogFromAmino(subData)
}
if err != nil {
return err
}
rd.Logs = append(rd.Logs, log)
case 4:
rd.Ret = make([]byte, dataLen)
copy(rd.Ret, subData)
case 5:
if dataLen != ethcmn.HashLength {
return fmt.Errorf("invalid tx hash length %d", dataLen)
}
copy(rd.TxHash[:], subData)
}
}
return nil
}
var resultDataBufferPool = amino.NewBufferPool()
func (rd *ResultData) MarshalToAmino(_ *amino.Codec) ([]byte, error) {
var buf = resultDataBufferPool.Get()
defer resultDataBufferPool.Put(buf)
fieldKeysType := [5]byte{1<<3 | 2, 2<<3 | 2, 3<<3 | 2, 4<<3 | 2, 5<<3 | 2}
for pos := 1; pos < 6; pos++ {
lBeforeKey := buf.Len()
var noWrite bool
err := buf.WriteByte(fieldKeysType[pos-1])
if err != nil {
return nil, err
}
switch pos {
case 1:
err := buf.WriteByte(byte(ethcmn.AddressLength))
if err != nil {
return nil, err
}
_, err = buf.Write(rd.ContractAddress.Bytes())
if err != nil {
return nil, err
}
case 2:
_, err := buf.Write([]byte{0b10000000, 0b00000010}) // bloom length 256
if err != nil {
return nil, err
}
_, err = buf.Write(rd.Bloom.Bytes())
if err != nil {
return nil, err
}
case 3:
logsLen := len(rd.Logs)
if logsLen == 0 {
noWrite = true
break
}
data, err := MarshalEthLogToAmino(rd.Logs[0])
if err != nil {
return nil, err
}
err = amino.EncodeUvarintToBuffer(buf, uint64(len(data)))
if err != nil {
return nil, err
}
_, err = buf.Write(data)
if err != nil {
return nil, err
}
for i := 1; i < logsLen; i++ {
err = buf.WriteByte(fieldKeysType[pos-1])
if err != nil {
return nil, err
}
data, err = MarshalEthLogToAmino(rd.Logs[i])
if err != nil {
return nil, err
}
err = amino.EncodeUvarintToBuffer(buf, uint64(len(data)))
if err != nil {
return nil, err
}
_, err = buf.Write(data)
if err != nil {
return nil, err
}
}
case 4:
retLen := len(rd.Ret)
if retLen == 0 {
noWrite = true
break
}
err := amino.EncodeUvarintToBuffer(buf, uint64(retLen))
if err != nil {
return nil, err
}
_, err = buf.Write(rd.Ret)
if err != nil {
return nil, err
}
case 5:
err := buf.WriteByte(byte(ethcmn.HashLength))
if err != nil {
return nil, err
}
_, err = buf.Write(rd.TxHash.Bytes())
if err != nil {
return nil, err
}
default:
panic("unreachable")
}
if noWrite {
buf.Truncate(lBeforeKey)
}
}
return amino.GetBytesBufferCopy(buf), nil
}
// String implements fmt.Stringer interface.
func (rd ResultData) String() string {
var logsStr string
logsLen := len(rd.Logs)
for i := 0; i < logsLen; i++ {
logsStr = fmt.Sprintf("%s\t\t%v\n ", logsStr, *rd.Logs[i])
}
return strings.TrimSpace(fmt.Sprintf(`ResultData:
ContractAddress: %s
Bloom: %s
Ret: %v
TxHash: %s
Logs:
%s`, rd.ContractAddress.String(), rd.Bloom.Big().String(), rd.Ret, rd.TxHash.String(), logsStr))
}
// EncodeResultData takes all of the necessary data from the EVM execution
// and returns the data as a byte slice encoded with amino
func EncodeResultData(data *ResultData) ([]byte, error) {
var buf = new(bytes.Buffer)
bz, err := data.MarshalToAmino(ModuleCdc)
if err != nil {
bz, err = ModuleCdc.MarshalBinaryBare(*data)
if err != nil {
return nil, err
}
}
// Write uvarint(len(bz)).
err = amino.EncodeUvarintToBuffer(buf, uint64(len(bz)))
if err != nil {
return nil, err
}
// Write bz.
_, err = buf.Write(bz)
if err != nil {
return nil, err
}
return buf.Bytes(), nil
}
func IsEvmEvent(txResult *abci.ResponseDeliverTx) bool {
for _, event := range txResult.Events {
if event.Type != "message" {
continue
}
for _, attr := range event.Attributes {
if string(attr.Key) == "module" && string(attr.Value) == "evm" {
return true
}
}
}
return false
}
// DecodeResultData decodes an amino-encoded byte slice into ResultData
func DecodeResultData(in []byte) (ResultData, error) {
if len(in) > 0 {
bz, err := amino.GetBinaryBareFromBinaryLengthPrefixed(in)
if err == nil {
var data ResultData
err = data.UnmarshalFromAmino(ModuleCdc, bz)
if err == nil {
return data, nil
}
}
}
var data ResultData
err := ModuleCdc.UnmarshalBinaryLengthPrefixed(in, &data)
if err != nil {
return ResultData{}, err
}
return data, nil
}
type recoverEthSigData struct {
Buffer bytes.Buffer
Sig [65]byte
SigHash ethcmn.Hash
}
var recoverEthSigDataPool = sync.Pool{
New: func() interface{} {
return &recoverEthSigData{}
},
}
func getZeroPrefixLen(buf []byte) int {
var i int
for i < len(buf) && buf[i] == 0 {
i++
}
return i
}
func getSigRSData(d *big.Int, buffer *bytes.Buffer) []byte {
const _S = (bits.UintSize / 8)
bzLen := len(d.Bits()) * _S
buffer.Reset()
buffer.Grow(bzLen)
var buf = buffer.Bytes()[:bzLen]
d.FillBytes(buf)
return buf[getZeroPrefixLen(buf):]
}
// recoverEthSig recovers a signature according to the Ethereum specification and
// returns the sender or an error.
//
// Ref: Ethereum Yellow Paper (BYZANTIUM VERSION 69351d5) Appendix F
// nolint: gocritic
func recoverEthSig(R, S, Vb *big.Int, sigHash *ethcmn.Hash) (ethcmn.Address, error) {
if Vb.BitLen() > 8 {
return ethcmn.Address{}, errors.New("invalid signature")
}
V := byte(Vb.Uint64() - 27)
if !ethcrypto.ValidateSignatureValues(V, R, S, true) {
return ethcmn.Address{}, errors.New("invalid signature")
}
ethSigData := recoverEthSigDataPool.Get().(*recoverEthSigData)
defer recoverEthSigDataPool.Put(ethSigData)
sig := (ðSigData.Sig)[:]
for i := range sig {
sig[i] = 0
}
// encode the signature in uncompressed format
buffer := ðSigData.Buffer
r := getSigRSData(R, buffer)
copy(sig[32-len(r):32], r)
s := getSigRSData(S, buffer)
copy(sig[64-len(s):64], s)
sig[64] = V
ethSigData.SigHash = *sigHash
// recover the public key from the signature
pub, err := ethcrypto.Ecrecover(ethSigData.SigHash[:], sig)
if err != nil {
return ethcmn.Address{}, err
}
if len(pub) == 0 || pub[0] != 4 {
return ethcmn.Address{}, errors.New("invalid public key")
}
var addr ethcmn.Address
copy(addr[:], keccak256To(sig[:32], pub[1:])[12:])
return addr, nil
}
// keccak256 calculates and returns the Keccak256 hash of the input data.
func keccak256(data ...[]byte) []byte {
b := make([]byte, 32)
// d := ethcrypto.NewKeccakState()
d := keccakStatePool.Get().(ethcrypto.KeccakState)
d.Reset()
for _, b := range data {
d.Write(b)
}
d.Read(b)
keccakStatePool.Put(d)
return b
}
func keccak256To(target []byte, data ...[]byte) []byte {
if len(target) != 32 {
panic("target size mismatch")
}
d := keccakStatePool.Get().(ethcrypto.KeccakState)
d.Reset()
for _, b := range data {
d.Write(b)
}
d.Read(target)
keccakStatePool.Put(d)
return target
}
var ethAddrStringPool = &sync.Pool{
New: func() interface{} {
return &[32]byte{}
},
}
type EthAddressStringer ethcmn.Address
func (address EthAddressStringer) String() string {
p := &address
return EthAddressToString((*ethcmn.Address)(p))
}
func EthAddressToString(address *ethcmn.Address) string {
var buf [len(address)*2 + 2]byte
buf[0] = '0'
buf[1] = 'x'
hex.Encode(buf[2:], address[:])
// compute checksum
sha := keccakStatePool.Get().(ethcrypto.KeccakState)
sha.Reset()
sha.Write(buf[2:])
hash := ethAddrStringPool.Get().(*[32]byte)
sha.Read(hash[:])
for i := 2; i < len(buf); i++ {
hashByte := hash[(i-2)/2]
if i%2 == 0 {
hashByte = hashByte >> 4
} else {
hashByte &= 0xf
}
if buf[i] > '9' && hashByte > 7 {
buf[i] -= 32
}
}
ethAddrStringPool.Put(hash)
keccakStatePool.Put(sha)
return amino.BytesToStr(buf[:])
}
type EthHashStringer ethcmn.Hash
func (h EthHashStringer) String() string {
var enc [len(h)*2 + 2]byte
enc[0] = '0'
enc[1] = 'x'
hex.Encode(enc[2:], h[:])
return amino.BytesToStr(enc[:])
}