path: root/core/genesis.go

// Copyright 2014 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum 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.
//
// go-ethereum 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 go-ethereum.  If not, see <http://www.gnu.org/licenses/>.

package core

import (
    "encoding/json"
    "fmt"
    "math/big"
    "os"

    "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/params"
)

// GenesisBlock creates a genesis block with the given nonce.
func GenesisBlock(nonce uint64, db common.Database) *types.Block {
    var accounts map[string]struct {
        Balance string
        Code    string
    }
    err := json.Unmarshal(GenesisAccounts, &accounts)
    if err != nil {
        fmt.Println("unable to decode genesis json data:", err)
        os.Exit(1)
    }
    statedb := state.New(common.Hash{}, db)
    for addr, account := range accounts {
        codedAddr := common.Hex2Bytes(addr)
        accountState := statedb.CreateAccount(common.BytesToAddress(codedAddr))
        accountState.SetBalance(common.Big(account.Balance))
        accountState.SetCode(common.FromHex(account.Code))
        statedb.UpdateStateObject(accountState)
    }
    statedb.Sync()

    block := types.NewBlock(&types.Header{
        Difficulty: params.GenesisDifficulty,
        GasLimit:   params.GenesisGasLimit,
        Nonce:      types.EncodeNonce(nonce),
        Root:       statedb.Root(),
    }, nil, nil, nil)
    block.Td = params.GenesisDifficulty
    return block
}

var GenesisAccounts = []byte(`{
    "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"}
}`)

// 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 common.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)
    block.Td = params.GenesisDifficulty
    return block
}