add genesis types file

core/types/genesis.go

@@ -0,0 +1,83 @@
+// Copyright 2024 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 types
+
+import (
+	"bytes"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/common/math"
+)
+
+//go:generate go run github.com/fjl/gencodec -type GenesisAccount -field-override genesisAccountMarshaling -out gen_genesis_account.go
+
+// GenesisAccount is an account in the state of the genesis block.
+type GenesisAccount struct {
+	Code       []byte                      `json:"code,omitempty"`
+	Storage    map[common.Hash]common.Hash `json:"storage,omitempty"`
+	Balance    *big.Int                    `json:"balance" gencodec:"required"`
+	Nonce      uint64                      `json:"nonce,omitempty"`
+	PrivateKey []byte                      `json:"secretKey,omitempty"` // for tests
+}
+
+type genesisAccountMarshaling struct {
+	Code       hexutil.Bytes
+	Balance    *math.HexOrDecimal256
+	Nonce      math.HexOrDecimal64
+	Storage    map[storageJSON]storageJSON
+	PrivateKey hexutil.Bytes
+}
+
+// storageJSON represents a 256 bit byte array, but allows less than 256 bits when
+// unmarshaling from hex.
+type storageJSON common.Hash
+
+func (h *storageJSON) UnmarshalText(text []byte) error {
+	text = bytes.TrimPrefix(text, []byte("0x"))
+	if len(text) > 64 {
+		return fmt.Errorf("too many hex characters in storage key/value %q", text)
+	}
+	offset := len(h) - len(text)/2 // pad on the left
+	if _, err := hex.Decode(h[offset:], text); err != nil {
+		return fmt.Errorf("invalid hex storage key/value %q", text)
+	}
+	return nil
+}
+
+func (h storageJSON) MarshalText() ([]byte, error) {
+	return hexutil.Bytes(h[:]).MarshalText()
+}
+
+// types.GenesisAlloc specifies the initial state that is part of the genesis block.
+type GenesisAlloc map[common.Address]GenesisAccount
+
+func (ga *GenesisAlloc) UnmarshalJSON(data []byte) error {
+	m := make(map[common.UnprefixedAddress]GenesisAccount)
+	if err := json.Unmarshal(data, &m); err != nil {
+		return err
+	}
+	*ga = make(GenesisAlloc)
+	for addr, a := range m {
+		(*ga)[common.Address(addr)] = a
+	}
+	return nil
+}