86 lines
2.3 KiB
Go
86 lines
2.3 KiB
Go
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// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// +build none
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/*
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The mkalloc tool creates the genesis allocation constants in genesis_alloc.go
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It outputs a const declaration that contains an RLP-encoded list of (address, balance) tuples.
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go run mkalloc.go genesis.json
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*/
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package main
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import (
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"encoding/json"
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"fmt"
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"math/big"
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"os"
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"sort"
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"strconv"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/rlp"
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)
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type allocItem struct{ Addr, Balance *big.Int }
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type allocList []allocItem
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func (a allocList) Len() int { return len(a) }
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func (a allocList) Less(i, j int) bool { return a[i].Addr.Cmp(a[j].Addr) < 0 }
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func (a allocList) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
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func makelist(g *core.Genesis) allocList {
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a := make(allocList, 0, len(g.Alloc))
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for addr, account := range g.Alloc {
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if len(account.Storage) > 0 || len(account.Code) > 0 || account.Nonce != 0 {
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panic(fmt.Sprintf("can't encode account %x", addr))
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}
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a = append(a, allocItem{addr.Big(), account.Balance})
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}
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sort.Sort(a)
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return a
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}
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func makealloc(g *core.Genesis) string {
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a := makelist(g)
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data, err := rlp.EncodeToBytes(a)
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if err != nil {
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panic(err)
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}
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return strconv.QuoteToASCII(string(data))
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}
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func main() {
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if len(os.Args) != 2 {
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fmt.Fprintln(os.Stderr, "Usage: mkalloc genesis.json")
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os.Exit(1)
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}
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g := new(core.Genesis)
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file, err := os.Open(os.Args[1])
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if err != nil {
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panic(err)
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}
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if err := json.NewDecoder(file).Decode(g); err != nil {
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panic(err)
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}
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fmt.Println("const allocData =", makealloc(g))
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}
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