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// 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 (
"encoding/json"
"fmt"
"io"
"io/ioutil"
"math/big"
"strings"
"github.com/ethereum/go-ethereum/common"
"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/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"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 {
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
}
}
if err := json.Unmarshal(contents, &genesis); err != nil {
return nil, err
}
statedb := state.New(common.Hash{}, chainDb)
for addr, account := range genesis.Alloc {
address := common.HexToAddress(addr)
statedb.AddBalance(address, common.String2Big(account.Balance))
statedb.SetCode(address, common.Hex2Bytes(account.Code))
for key, value := range account.Storage {
statedb.SetState(address, common.HexToHash(key), common.HexToHash(value))
}
}
statedb.SyncObjects()
difficulty := common.String2Big(genesis.Difficulty)
block := types.NewBlock(&types.Header{
Nonce: types.EncodeNonce(common.String2Big(genesis.Nonce).Uint64()),
Time: common.String2Big(genesis.Timestamp),
ParentHash: common.HexToHash(genesis.ParentHash),
Extra: common.FromHex(genesis.ExtraData),
GasLimit: common.String2Big(genesis.GasLimit),
Difficulty: difficulty,
MixDigest: common.HexToHash(genesis.Mixhash),
Coinbase: common.HexToAddress(genesis.Coinbase),
Root: statedb.Root(),
}, nil, nil, nil)
if block := GetBlock(chainDb, block.Hash()); block != nil {
glog.V(logger.Info).Infoln("Genesis block already in chain. Writing canonical number")
err := WriteCanonicalHash(chainDb, block.Hash(), block.NumberU64())
if err != nil {
return nil, err
}
return block, nil
}
statedb.Sync()
if err := WriteTd(chainDb, block.Hash(), difficulty); err != nil {
return nil, err
}
if err := WriteBlock(chainDb, block); 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
}
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.
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)
statedb.SyncObjects()
statedb.Sync()
block := types.NewBlock(&types.Header{
Difficulty: params.GenesisDifficulty,
GasLimit: params.GenesisGasLimit,
Root: statedb.Root(),
}, nil, nil, nil)
return block
}
func WriteGenesisBlockForTesting(db ethdb.Database, addr common.Address, balance *big.Int) *types.Block {
testGenesis := fmt.Sprintf(`{
"nonce":"0x%x",
"gasLimit":"0x%x",
"difficulty":"0x%x",
"alloc": {
"0x%x":{"balance":"0x%x"}
}
}`, types.EncodeNonce(0), params.GenesisGasLimit.Bytes(), params.GenesisDifficulty.Bytes(), addr, balance.Bytes())
block, _ := WriteGenesisBlock(db, strings.NewReader(testGenesis))
return block
}
func WriteTestNetGenesisBlock(chainDb ethdb.Database, nonce uint64) (*types.Block, error) {
testGenesis := fmt.Sprintf(`{
"nonce":"0x%x",
"gasLimit":"0x%x",
"difficulty":"0x%x",
"alloc": {
"0000000000000000000000000000000000000001": {"balance": "1"},
"0000000000000000000000000000000000000002": {"balance": "1"},
"0000000000000000000000000000000000000003": {"balance": "1"},
"0000000000000000000000000000000000000004": {"balance": "1"},
"dbdbdb2cbd23b783741e8d7fcf51e459b497e4a6": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
"e4157b34ea9615cfbde6b4fda419828124b70c78": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
"b9c015918bdaba24b4ff057a92a3873d6eb201be": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
"6c386a4b26f73c802f34673f7248bb118f97424a": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
"cd2a3d9f938e13cd947ec05abc7fe734df8dd826": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
"2ef47100e0787b915105fd5e3f4ff6752079d5cb": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
"e6716f9544a56c530d868e4bfbacb172315bdead": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
"1a26338f0d905e295fccb71fa9ea849ffa12aaf4": {"balance": "1606938044258990275541962092341162602522202993782792835301376"}
}
}`, types.EncodeNonce(nonce), params.GenesisGasLimit.Bytes(), params.GenesisDifficulty.Bytes())
return WriteGenesisBlock(chainDb, strings.NewReader(testGenesis))
}
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