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genesis.go
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genesis.go
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// Copyright 2018 The klaytn Authors
// Copyright 2017 AMIS Technologies
// This file is part of the go-ethereum library.
//
// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package genesis
import (
"encoding/json"
"io/ioutil"
"math/big"
"path/filepath"
"time"
"github.com/klaytn/klaytn/blockchain"
istcommon "github.com/klaytn/klaytn/cmd/homi/common"
"github.com/klaytn/klaytn/params"
)
const (
FileName = "genesis.json"
InitBlockScore = 1
)
func New(options ...Option) *blockchain.Genesis {
genesis := &blockchain.Genesis{
Timestamp: uint64(time.Now().Unix()),
BlockScore: big.NewInt(InitBlockScore),
Alloc: make(blockchain.GenesisAlloc),
Config: ¶ms.ChainConfig{
ChainID: big.NewInt(2018),
UnitPrice: 0,
DeriveShaImpl: 0,
},
}
for _, opt := range options {
opt(genesis)
}
return genesis
}
func NewClique(options ...Option) *blockchain.Genesis {
genesis := &blockchain.Genesis{
Timestamp: uint64(time.Now().Unix()),
BlockScore: big.NewInt(InitBlockScore),
Alloc: make(blockchain.GenesisAlloc),
Config: ¶ms.ChainConfig{
ChainID: big.NewInt(3000), // TODO-Klaytn Needs Optional chainID
},
}
for _, opt := range options {
opt(genesis)
}
return genesis
}
func NewFileAt(dir string, options ...Option) string {
genesis := New(options...)
if err := Save(dir, genesis); err != nil {
logger.Error("Failed to save genesis", "dir", dir, "err", err)
return ""
}
return filepath.Join(dir, FileName)
}
func NewFile(options ...Option) string {
dir, _ := istcommon.GenerateRandomDir()
return NewFileAt(dir, options...)
}
func Save(dataDir string, genesis *blockchain.Genesis) error {
filePath := filepath.Join(dataDir, FileName)
var raw []byte
var err error
raw, err = json.Marshal(genesis)
if err != nil {
return err
}
return ioutil.WriteFile(filePath, raw, 0600)
}