path: root/core/genesis.go

package core

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

    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/ethutil"
    "github.com/ethereum/go-ethereum/state"
)

/*
 * This is the special genesis block.
 */

var ZeroHash256 = make([]byte, 32)
var ZeroHash160 = make([]byte, 20)
var ZeroHash512 = make([]byte, 64)
var EmptyShaList = crypto.Sha3(ethutil.Encode([]interface{}{}))
var EmptyListRoot = crypto.Sha3(ethutil.Encode(""))

func GenesisBlock(db ethutil.Database) *types.Block {
    genesis := types.NewBlock(ZeroHash256, ZeroHash160, nil, big.NewInt(131072), crypto.Sha3(big.NewInt(42).Bytes()), "")
    genesis.Header().Number = ethutil.Big0
    genesis.Header().GasLimit = big.NewInt(1000000)
    genesis.Header().GasUsed = ethutil.Big0
    genesis.Header().Time = 0
    genesis.Td = ethutil.Big0

    genesis.SetUncles([]*types.Header{})
    genesis.SetTransactions(types.Transactions{})
    genesis.SetReceipts(types.Receipts{})

    var accounts map[string]struct{ Balance string }
    err := json.Unmarshal(genesisData, &accounts)
    if err != nil {
        fmt.Println("enable to decode genesis json data:", err)
        os.Exit(1)
    }

    statedb := state.New(genesis.Root(), db)
    for addr, account := range accounts {
        codedAddr := ethutil.Hex2Bytes(addr)
        accountState := statedb.GetAccount(codedAddr)
        accountState.SetBalance(ethutil.Big(account.Balance))
        statedb.UpdateStateObject(accountState)
    }
    statedb.Sync()
    genesis.Header().Root = statedb.Root()

    fmt.Printf("+++ genesis +++\nRoot: %x\nHash: %x\n", genesis.Header().Root, genesis.Hash())

    return genesis
}

var genesisData = []byte(`{
    "dbdbdb2cbd23b783741e8d7fcf51e459b497e4a6": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
    "e4157b34ea9615cfbde6b4fda419828124b70c78": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
    "b9c015918bdaba24b4ff057a92a3873d6eb201be": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
    "6c386a4b26f73c802f34673f7248bb118f97424a": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
    "cd2a3d9f938e13cd947ec05abc7fe734df8dd826": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
    "2ef47100e0787b915105fd5e3f4ff6752079d5cb": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
    "e6716f9544a56c530d868e4bfbacb172315bdead": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
    "1a26338f0d905e295fccb71fa9ea849ffa12aaf4": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
    "b0afc46d9ce366d06ab4952ca27db1d9557ae9fd": {"balance": "154162184000000000000000"},
    "f6b1e9dc460d4d62cc22ec5f987d726929c0f9f0": {"balance": "102774789000000000000000"},
    "cc45122d8b7fa0b1eaa6b29e0fb561422a9239d0": {"balance": "51387394000000000000000"},
    "b7576e9d314df41ec5506494293afb1bd5d3f65d": {"balance": "69423399000000000000000"}
}`)