cmd, core, eth, common: genesis preparation
Implemented the --genesis flag thru which we can set a custom genesis block, including the official Ethereum genesis block.
This commit is contained in:
Jeffrey Wilcke
136
core/genesis.go
136
core/genesis.go
@ -19,8 +19,10 @@ package core
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import (
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"math/big"
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"os"
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"strings"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/state"
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@ -28,51 +30,71 @@ import (
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"github.com/ethereum/go-ethereum/params"
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)
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// GenesisBlock creates a genesis block with the given nonce.
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func GenesisBlock(nonce uint64, db common.Database) *types.Block {
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var accounts map[string]struct {
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Balance string
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Code string
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}
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err := json.Unmarshal(GenesisAccounts, &accounts)
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// WriteGenesisBlock writes the genesis block to the database as block number 0
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func WriteGenesisBlock(stateDb, blockDb common.Database, reader io.Reader) (*types.Block, error) {
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contents, err := ioutil.ReadAll(reader)
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if err != nil {
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fmt.Println("unable to decode genesis json data:", err)
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os.Exit(1)
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return nil, err
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}
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statedb := state.New(common.Hash{}, db)
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for addr, account := range accounts {
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codedAddr := common.Hex2Bytes(addr)
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accountState := statedb.CreateAccount(common.BytesToAddress(codedAddr))
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accountState.SetBalance(common.Big(account.Balance))
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accountState.SetCode(common.FromHex(account.Code))
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statedb.UpdateStateObject(accountState)
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}
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statedb.Sync()
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var genesis struct {
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Nonce string
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Timestamp string
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ParentHash string
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ExtraData string
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GasLimit string
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Difficulty string
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Mixhash string
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Coinbase string
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Alloc map[string]struct {
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Code string
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Storage map[string]string
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Balance string
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}
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}
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if err := json.Unmarshal(contents, &genesis); err != nil {
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return nil, err
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}
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statedb := state.New(common.Hash{}, stateDb)
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for addr, account := range genesis.Alloc {
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address := common.HexToAddress(addr)
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statedb.AddBalance(address, common.String2Big(account.Balance))
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statedb.SetCode(address, common.Hex2Bytes(account.Code))
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for key, value := range account.Storage {
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statedb.SetState(address, common.HexToHash(key), common.HexToHash(value))
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}
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}
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statedb.SyncObjects()
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difficulty := common.String2Big(genesis.Difficulty)
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block := types.NewBlock(&types.Header{
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Difficulty: params.GenesisDifficulty,
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GasLimit: params.GenesisGasLimit,
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Nonce: types.EncodeNonce(nonce),
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Nonce: types.EncodeNonce(common.String2Big(genesis.Nonce).Uint64()),
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Time: common.String2Big(genesis.Timestamp).Uint64(),
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ParentHash: common.HexToHash(genesis.ParentHash),
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Extra: common.Hex2Bytes(genesis.ExtraData),
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GasLimit: common.String2Big(genesis.GasLimit),
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Difficulty: difficulty,
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MixDigest: common.HexToHash(genesis.Mixhash),
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Coinbase: common.HexToAddress(genesis.Coinbase),
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Root: statedb.Root(),
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}, nil, nil, nil)
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block.Td = params.GenesisDifficulty
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return block
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}
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block.Td = difficulty
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var GenesisAccounts = []byte(`{
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"0000000000000000000000000000000000000001": {"balance": "1"},
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"0000000000000000000000000000000000000002": {"balance": "1"},
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"0000000000000000000000000000000000000003": {"balance": "1"},
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"0000000000000000000000000000000000000004": {"balance": "1"},
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"dbdbdb2cbd23b783741e8d7fcf51e459b497e4a6": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"e4157b34ea9615cfbde6b4fda419828124b70c78": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"b9c015918bdaba24b4ff057a92a3873d6eb201be": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"6c386a4b26f73c802f34673f7248bb118f97424a": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"cd2a3d9f938e13cd947ec05abc7fe734df8dd826": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"2ef47100e0787b915105fd5e3f4ff6752079d5cb": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"e6716f9544a56c530d868e4bfbacb172315bdead": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"1a26338f0d905e295fccb71fa9ea849ffa12aaf4": {"balance": "1606938044258990275541962092341162602522202993782792835301376"}
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}`)
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statedb.Sync()
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err = WriteBlock(blockDb, block)
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if err != nil {
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return nil, err
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}
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err = WriteHead(blockDb, block)
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if err != nil {
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return nil, err
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}
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return block, nil
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}
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// GenesisBlockForTesting creates a block in which addr has the given wei balance.
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// The state trie of the block is written to db.
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@ -90,3 +112,39 @@ func GenesisBlockForTesting(db common.Database, addr common.Address, balance *bi
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block.Td = params.GenesisDifficulty
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return block
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}
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func WriteGenesisBlockForTesting(db common.Database, addr common.Address, balance *big.Int) *types.Block {
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testGenesis := fmt.Sprintf(`{
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"nonce":"0x%x",
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"gasLimit":"0x%x",
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"difficulty":"0x%x",
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"alloc": {
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"0x%x":{"balance":"0x%x"}
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}
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}`, types.EncodeNonce(0), params.GenesisGasLimit.Bytes(), params.GenesisDifficulty.Bytes(), addr, balance.Bytes())
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block, _ := WriteGenesisBlock(db, db, strings.NewReader(testGenesis))
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return block
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}
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func WriteTestNetGenesisBlock(stateDb, blockDb common.Database, nonce uint64) (*types.Block, error) {
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testGenesis := fmt.Sprintf(`{
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"nonce":"0x%x",
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"gasLimit":"0x%x",
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"difficulty":"0x%x",
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"alloc": {
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"0000000000000000000000000000000000000001": {"balance": "1"},
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"0000000000000000000000000000000000000002": {"balance": "1"},
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"0000000000000000000000000000000000000003": {"balance": "1"},
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"0000000000000000000000000000000000000004": {"balance": "1"},
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"dbdbdb2cbd23b783741e8d7fcf51e459b497e4a6": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"e4157b34ea9615cfbde6b4fda419828124b70c78": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"b9c015918bdaba24b4ff057a92a3873d6eb201be": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"6c386a4b26f73c802f34673f7248bb118f97424a": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"cd2a3d9f938e13cd947ec05abc7fe734df8dd826": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"2ef47100e0787b915105fd5e3f4ff6752079d5cb": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"e6716f9544a56c530d868e4bfbacb172315bdead": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
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"1a26338f0d905e295fccb71fa9ea849ffa12aaf4": {"balance": "1606938044258990275541962092341162602522202993782792835301376"}
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}
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}`, types.EncodeNonce(nonce), params.GenesisGasLimit.Bytes(), params.GenesisDifficulty.Bytes())
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return WriteGenesisBlock(stateDb, blockDb, strings.NewReader(testGenesis))
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}
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