100 lines
2.7 KiB
Go
100 lines
2.7 KiB
Go
// Copyright 2017 AMIS Technologies
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package genesis
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"math/big"
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"path/filepath"
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"strings"
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"time"
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"github.com/ethereum/go-ethereum/consensus/istanbul"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/params"
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"github.com/getamis/istanbul-tools/common"
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)
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const (
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FileName = "genesis.json"
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InitGasLimit = 4700000
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InitDifficulty = 1
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)
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func New(options ...Option) *core.Genesis {
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genesis := &core.Genesis{
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Timestamp: uint64(time.Now().Unix()),
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GasLimit: InitGasLimit,
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Difficulty: big.NewInt(InitDifficulty),
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Alloc: make(core.GenesisAlloc),
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Config: ¶ms.ChainConfig{
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HomesteadBlock: big.NewInt(1),
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EIP150Block: big.NewInt(2),
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EIP155Block: big.NewInt(3),
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EIP158Block: big.NewInt(3),
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Istanbul: ¶ms.IstanbulConfig{
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ProposerPolicy: uint64(istanbul.DefaultConfig.ProposerPolicy),
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Epoch: istanbul.DefaultConfig.Epoch,
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},
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},
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Mixhash: types.IstanbulDigest,
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}
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for _, opt := range options {
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opt(genesis)
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}
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return genesis
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}
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func NewFileAt(dir string, isQuorum bool, options ...Option) string {
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genesis := New(options...)
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if err := Save(dir, genesis, isQuorum); err != nil {
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log.Error("Failed to save genesis", "dir", dir, "err", err)
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return ""
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}
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return filepath.Join(dir, FileName)
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}
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func NewFile(isQuorum bool, options ...Option) string {
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dir, _ := common.GenerateRandomDir()
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return NewFileAt(dir, isQuorum, options...)
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}
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func Save(dataDir string, genesis *core.Genesis, isQuorum bool) error {
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filePath := filepath.Join(dataDir, FileName)
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raw, err := json.Marshal(genesis)
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if err != nil {
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return err
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}
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//Quorum hack: add isQuorum field
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if isQuorum {
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jsonStr := string(raw)
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idx := strings.Index(jsonStr, ",\"istanbul\"")
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jsonStr = fmt.Sprintf("%s,\"isQuorum\":true%s", jsonStr[:idx], jsonStr[idx:])
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raw = []byte(jsonStr)
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}
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return ioutil.WriteFile(filePath, raw, 0600)
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}
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