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// 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"
"sort"
"strconv"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/rlp"
)
type allocItem struct{ Addr, Balance *big.Int }
type allocList []allocItem
func (a allocList) Len() int { return len(a) }
func (a allocList) Less(i, j int) bool { return a[i].Addr.Cmp(a[j].Addr) < 0 }
func (a allocList) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func makelist(g *core.Genesis) allocList {
a := make(allocList, 0, len(g.Alloc))
for addr, account := range g.Alloc {
if len(account.Storage) > 0 || len(account.Code) > 0 || account.Nonce != 0 {
panic(fmt.Sprintf("can't encode account %x", addr))
}
bigAddr := new(big.Int).SetBytes(addr.Bytes())
a = append(a, allocItem{bigAddr, account.Balance})
}
sort.Sort(a)
return a
}
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)
}
if err := json.NewDecoder(file).Decode(g); err != nil {
panic(err)
}
fmt.Println("const allocData =", makealloc(g))
}