/
utils.go
96 lines (85 loc) · 2.91 KB
/
utils.go
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// Copyright 2019 The klaytn Authors
// This file is part of the klaytn library.
//
// The klaytn library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The klaytn library 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the klaytn library. If not, see <http://www.gnu.org/licenses/>.
package dbsyncer
import (
"strings"
"github.com/klaytn/klaytn/blockchain/types"
"github.com/klaytn/klaytn/common"
"github.com/klaytn/klaytn/consensus/istanbul"
"github.com/klaytn/klaytn/crypto/sha3"
"github.com/klaytn/klaytn/rlp"
)
const (
// mysql driver (go) has query parameter max size (65535)
// transaction record has 15 parameters
BULK_INSERT_SIZE = 3000
TX_KEY_FACTOR = 100000
)
func getProposerAndValidatorsFromBlock(block *types.Block) (proposer string, validators string, err error) {
blockNumber := block.NumberU64()
if blockNumber == 0 {
return "", "", nil
}
// Retrieve the signature from the header extra-data
istanbulExtra, err := types.ExtractIstanbulExtra(block.Header())
if err != nil {
return "", "", err
}
sigHash, err := sigHash(block.Header())
if err != nil {
return "", "", err
}
proposerAddr, err := istanbul.GetSignatureAddress(sigHash.Bytes(), istanbulExtra.Seal)
if err != nil {
return "", "", err
}
commiteeAddrs := make([]common.Address, len(istanbulExtra.Validators))
for i, addr := range istanbulExtra.Validators {
commiteeAddrs[i] = addr
}
var strValidators []string
for _, validator := range istanbulExtra.Validators {
strValidators = append(strValidators, validator.Hex())
}
return proposerAddr.Hex(), strings.Join(strValidators, ","), nil
}
// ecrecover extracts the Klaytn account address from a signed header.
func ecrecover(header *types.Header) (common.Address, error) {
// Retrieve the signature from the header extra-data
istanbulExtra, err := types.ExtractIstanbulExtra(header)
if err != nil {
return common.Address{}, err
}
sigHash, err := sigHash(header)
if err != nil {
return common.Address{}, err
}
addr, err := istanbul.GetSignatureAddress(sigHash.Bytes(), istanbulExtra.Seal)
if err != nil {
return addr, err
}
return addr, nil
}
func sigHash(header *types.Header) (hash common.Hash, err error) {
hasher := sha3.NewKeccak256()
// Clean seal is required for calculating proposer seal.
if err := rlp.Encode(hasher, types.IstanbulFilteredHeader(header, false)); err != nil {
logger.Error("fail to encode", "err", err)
return common.Hash{}, err
}
hasher.Sum(hash[:0])
return hash, nil
}