// Copyright 2014 The go-ethereum Authors
// 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 core
import (
"compress/bzip2"
"compress/gzip"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"math/big"
"strings"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
)
// WriteGenesisBlock writes the genesis block to the database as block number 0
func WriteGenesisBlock(chainDb ethdb.Database, reader io.Reader) (*types.Block, error) {
contents, err := ioutil.ReadAll(reader)
if err != nil {
return nil, err
}
var genesis struct {
ChainConfig *params.ChainConfig `json:"config"`
Nonce string
Timestamp string
ParentHash string
ExtraData string
GasLimit string
Difficulty string
Mixhash string
Coinbase string
Alloc map[string]struct {
Code string
Storage map[string]string
Balance string
Nonce string
}
}
if err := json.Unmarshal(contents, &genesis); err != nil {
return nil, err
}
// creating with empty hash always works
statedb, _ := state.New(common.Hash{}, chainDb)
for addr, account := range genesis.Alloc {
balance, ok := math.ParseBig256(account.Balance)
if !ok {
return nil, fmt.Errorf("invalid balance for account %s: %q", addr, account.Balance)
}
nonce, ok := math.ParseUint64(account.Nonce)
if !ok {
return nil, fmt.Errorf("invalid nonce for account %s: %q", addr, account.Nonce)
}
address := common.HexToAddress(addr)
statedb.AddBalance(address, balance)
statedb.SetCode(address, common.FromHex(account.Code))
statedb.SetNonce(address, nonce)
for key, value := range account.Storage {
statedb.SetState(address, common.HexToHash(key), common.HexToHash(value))
}
}
root, stateBatch := statedb.CommitBatch(false)
difficulty, ok := math.ParseBig256(genesis.Difficulty)
if !ok {
return nil, fmt.Errorf("invalid difficulty: %q", genesis.Difficulty)
}
gaslimit, ok := math.ParseUint64(genesis.GasLimit)
if !ok {
return nil, fmt.Errorf("invalid gas limit: %q", genesis.GasLimit)
}
nonce, ok := math.ParseUint64(genesis.Nonce)
if !ok {
return nil, fmt.Errorf("invalid nonce: %q", genesis.Nonce)
}
timestamp, ok := math.ParseBig256(genesis.Timestamp)
if !ok {
return nil, fmt.Errorf("invalid timestamp: %q", genesis.Timestamp)
}
block := types.NewBlock(&types.Header{
Nonce: types.EncodeNonce(nonce),
Time: timestamp,
ParentHash: common.HexToHash(genesis.ParentHash),
Extra: common.FromHex(genesis.ExtraData),
GasLimit: new(big.Int).SetUint64(gaslimit),
Difficulty: difficulty,
MixDigest: common.HexToHash(genesis.Mixhash),
Coinbase: common.HexToAddress(genesis.Coinbase),
Root: root,
}, nil, nil, nil)
if block := GetBlock(chainDb, block.Hash(), block.NumberU64()); block != nil {
log.Info(fmt.Sprint("Genesis block already in chain. Writing canonical number"))
err := WriteCanonicalHash(chainDb, block.Hash(), block.NumberU64())
if err != nil {
return nil, err
}
return block, nil
}
if err := stateBatch.Write(); err != nil {
return nil, fmt.Errorf("cannot write state: %v", err)
}
if err := WriteTd(chainDb, block.Hash(), block.NumberU64(), difficulty); err != nil {
return nil, err
}
if err := WriteBlock(chainDb, block); err != nil {
return nil, err
}
if err := WriteBlockReceipts(chainDb, block.Hash(), block.NumberU64(), nil); err != nil {
return nil, err
}
if err := WriteCanonicalHash(chainDb, block.Hash(), block.NumberU64()); err != nil {
return nil, err
}
if err := WriteHeadBlockHash(chainDb, block.Hash()); err != nil {
return nil, err
}
if err := WriteChainConfig(chainDb, block.Hash(), genesis.ChainConfig); err != nil {
return nil, err
}
return block, nil
}
// GenesisBlockForTesting creates a block in which addr has the given wei balance.
// The state trie of the block is written to db. the passed db needs to contain a state root
func GenesisBlockForTesting(db ethdb.Database, addr common.Address, balance *big.Int) *types.Block {
statedb, _ := state.New(common.Hash{}, db)
obj := statedb.GetOrNewStateObject(addr)
obj.SetBalance(balance)
root, err := statedb.Commit(false)
if err != nil {
panic(fmt.Sprintf("cannot write state: %v", err))
}
block := types.NewBlock(&types.Header{
Difficulty: params.GenesisDifficulty,
GasLimit: params.GenesisGasLimit,
Root: root,
}, nil, nil, nil)
return block
}
type GenesisAccount struct {
Address common.Address
Balance *big.Int
}
func WriteGenesisBlockForTesting(db ethdb.Database, accounts ...GenesisAccount) *types.Block {
accountJson := "{"
for i, account := range accounts {
if i != 0 {
accountJson += ","
}
accountJson += fmt.Sprintf(`"0x%x":{"balance":"%d"}`, account.Address, account.Balance)
}
accountJson += "}"
testGenesis := fmt.Sprintf(`{
"nonce":"0x%x",
"gasLimit":"0x%x",
"difficulty":"0x%x",
"alloc": %s
}`, types.EncodeNonce(0), params.GenesisGasLimit.Bytes(), params.GenesisDifficulty.Bytes(), accountJson)
block, err := WriteGenesisBlock(db, strings.NewReader(testGenesis))
if err != nil {
panic(err)
}
return block
}
// WriteDefaultGenesisBlock assembles the official Ethereum genesis block and
// writes it - along with all associated state - into a chain database.
func WriteDefaultGenesisBlock(chainDb ethdb.Database) (*types.Block, error) {
return WriteGenesisBlock(chainDb, strings.NewReader(DefaultGenesisBlock()))
}
// WriteTestNetGenesisBlock assembles the test network genesis block and
// writes it - along with all associated state - into a chain database.
func WriteTestNetGenesisBlock(chainDb ethdb.Database) (*types.Block, error) {
return WriteGenesisBlock(chainDb, strings.NewReader(DefaultTestnetGenesisBlock()))
}
// DefaultGenesisBlock assembles a JSON string representing the default Ethereum
// genesis block.
func DefaultGenesisBlock() string {
reader, err := gzip.NewReader(base64.NewDecoder(base64.StdEncoding, strings.NewReader(defaultGenesisBlock)))
if err != nil {
panic(fmt.Sprintf("failed to access default genesis: %v", err))
}
blob, err := ioutil.ReadAll(reader)
if err != nil {
panic(fmt.Sprintf("failed to load default genesis: %v", err))
}
return string(blob)
}
// DefaultTestnetGenesisBlock assembles a JSON string representing the default Ethereum
// test network genesis block.
func DefaultTestnetGenesisBlock() string {
reader := bzip2.NewReader(base64.NewDecoder(base64.StdEncoding, strings.NewReader(defaultTestnetGenesisBlock)))
blob, err := ioutil.ReadAll(reader)
if err != nil {
panic(fmt.Sprintf("failed to load default genesis: %v", err))
}
return string(blob)
}
// DevGenesisBlock assembles a JSON string representing a local dev genesis block.
func DevGenesisBlock() string {
reader := bzip2.NewReader(base64.NewDecoder(base64.StdEncoding, strings.NewReader(defaultDevnetGenesisBlock)))
blob, err := ioutil.ReadAll(reader)
if err != nil {
panic(fmt.Sprintf("failed to load dev genesis: %v", err))
}
return string(blob)
}
