github.com/klaytn/klaytn@v1.12.1/cmd/homi/genesis/genesis.go (about)

     1  // Copyright 2018 The klaytn Authors
     2  // Copyright 2017 AMIS Technologies
     3  // This file is part of the go-ethereum library.
     4  //
     5  // The go-ethereum library is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU Lesser General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // The go-ethereum library is distributed in the hope that it will be useful,
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  // GNU Lesser General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU Lesser General Public License
    16  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package genesis
    19  
    20  import (
    21  	"encoding/json"
    22  	"math/big"
    23  	"os"
    24  	"path/filepath"
    25  	"time"
    26  
    27  	"github.com/klaytn/klaytn/blockchain"
    28  	istcommon "github.com/klaytn/klaytn/cmd/homi/common"
    29  	"github.com/klaytn/klaytn/params"
    30  )
    31  
    32  const (
    33  	FileName       = "genesis.json"
    34  	InitBlockScore = 1
    35  )
    36  
    37  func New(options ...Option) *blockchain.Genesis {
    38  	genesis := &blockchain.Genesis{
    39  		Timestamp:  uint64(time.Now().Unix()),
    40  		BlockScore: big.NewInt(InitBlockScore),
    41  		Alloc:      make(blockchain.GenesisAlloc),
    42  		Config: &params.ChainConfig{
    43  			ChainID:       big.NewInt(2018),
    44  			UnitPrice:     0,
    45  			DeriveShaImpl: 0,
    46  		},
    47  	}
    48  
    49  	for _, opt := range options {
    50  		opt(genesis)
    51  	}
    52  
    53  	return genesis
    54  }
    55  
    56  func NewClique(options ...Option) *blockchain.Genesis {
    57  	genesis := &blockchain.Genesis{
    58  		Timestamp:  uint64(time.Now().Unix()),
    59  		BlockScore: big.NewInt(InitBlockScore),
    60  		Alloc:      make(blockchain.GenesisAlloc),
    61  		Config: &params.ChainConfig{
    62  			ChainID: big.NewInt(3000), // TODO-Klaytn Needs Optional chainID
    63  		},
    64  	}
    65  
    66  	for _, opt := range options {
    67  		opt(genesis)
    68  	}
    69  
    70  	return genesis
    71  }
    72  
    73  func NewFileAt(dir string, options ...Option) string {
    74  	genesis := New(options...)
    75  	if err := Save(dir, genesis); err != nil {
    76  		logger.Error("Failed to save genesis", "dir", dir, "err", err)
    77  		return ""
    78  	}
    79  
    80  	return filepath.Join(dir, FileName)
    81  }
    82  
    83  func NewFile(options ...Option) string {
    84  	dir, _ := istcommon.GenerateRandomDir()
    85  	return NewFileAt(dir, options...)
    86  }
    87  
    88  func Save(dataDir string, genesis *blockchain.Genesis) error {
    89  	filePath := filepath.Join(dataDir, FileName)
    90  
    91  	var raw []byte
    92  	var err error
    93  	raw, err = json.Marshal(genesis)
    94  	if err != nil {
    95  		return err
    96  	}
    97  	return os.WriteFile(filePath, raw, 0o600)
    98  }