Official Go implementation of the Ethereum protocol
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go-ethereum/core/mkalloc.go

110 lines
2.8 KiB

// Copyright 2017 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/>.
//go:build none
// +build none
/*
The mkalloc tool creates the genesis allocation constants in genesis_alloc.go
It outputs a const declaration that contains an RLP-encoded list of (address, balance) tuples.
go run mkalloc.go genesis.json
*/
package main
import (
"encoding/json"
"fmt"
"math/big"
"os"
"slices"
"strconv"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/rlp"
)
type allocItem struct {
Addr *big.Int
Balance *big.Int
Misc *allocItemMisc `rlp:"optional"`
}
type allocItemMisc struct {
Nonce uint64
Code []byte
Slots []allocItemStorageItem
}
type allocItemStorageItem struct {
Key common.Hash
Val common.Hash
}
func makelist(g *core.Genesis) []allocItem {
items := make([]allocItem, 0, len(g.Alloc))
for addr, account := range g.Alloc {
var misc *allocItemMisc
if len(account.Storage) > 0 || len(account.Code) > 0 || account.Nonce != 0 {
misc = &allocItemMisc{
Nonce: account.Nonce,
Code: account.Code,
Slots: make([]allocItemStorageItem, 0, len(account.Storage)),
}
for key, val := range account.Storage {
misc.Slots = append(misc.Slots, allocItemStorageItem{key, val})
}
slices.SortFunc(misc.Slots, func(a, b allocItemStorageItem) int {
return a.Key.Cmp(b.Key)
})
}
bigAddr := new(big.Int).SetBytes(addr.Bytes())
items = append(items, allocItem{bigAddr, account.Balance, misc})
}
slices.SortFunc(items, func(a, b allocItem) int {
return a.Addr.Cmp(b.Addr)
})
return items
}
func makealloc(g *core.Genesis) string {
a := makelist(g)
data, err := rlp.EncodeToBytes(a)
if err != nil {
panic(err)
}
return strconv.QuoteToASCII(string(data))
}
func main() {
if len(os.Args) != 2 {
fmt.Fprintln(os.Stderr, "Usage: mkalloc genesis.json")
os.Exit(1)
}
g := new(core.Genesis)
file, err := os.Open(os.Args[1])
if err != nil {
panic(err)
}
defer file.Close()
if err := json.NewDecoder(file).Decode(g); err != nil {
panic(err)
}
fmt.Println("const allocData =", makealloc(g))
}