1 files changed, 75 insertions, 0 deletions
diff --git a/core/genesis.go b/core/genesis.go
new file mode 100644
index 000000000..bfd51f196
--- /dev/null
+++ b/core/genesis.go
@@ -0,0 +1,75 @@
+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/common"
+	"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(common.Encode([]interface{}{}))
+var EmptyListRoot = crypto.Sha3(common.Encode(""))
+
+var GenesisDiff = big.NewInt(131072)
+var GenesisGasLimit = big.NewInt(3141592)
+
+func GenesisBlock(db common.Database) *types.Block {
+	genesis := types.NewBlock(ZeroHash256, ZeroHash160, nil, GenesisDiff, 42, "")
+	genesis.Header().Number = common.Big0
+	genesis.Header().GasLimit = GenesisGasLimit
+	genesis.Header().GasUsed = common.Big0
+	genesis.Header().Time = 0
+	genesis.Header().MixDigest = make([]byte, 32)
+
+	genesis.Td = common.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 := common.Hex2Bytes(addr)
+		accountState := statedb.GetAccount(codedAddr)
+		accountState.SetBalance(common.Big(account.Balance))
+		statedb.UpdateStateObject(accountState)
+	}
+	statedb.Sync()
+	genesis.Header().Root = statedb.Root()
+
+	return genesis
+}
+
+var genesisData = []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"}
+}`)