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main.go
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main.go
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// Copyright 2015 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
// blspopchecker checks BLS PoPs in genesis.
package main
import (
"encoding/hex"
"encoding/json"
"errors"
"flag"
"fmt"
"io/ioutil"
"os"
"github.com/celo-org/celo-blockchain/common"
"github.com/celo-org/celo-bls-go/bls"
)
var (
message = flag.String("message", "", "Common message to verify for the PoPs")
genesis = flag.String("genesis", "", "JSON file containing the genesis PoPs")
)
func init() {
flag.Usage = func() {
fmt.Fprintln(os.Stderr, "Usage:", os.Args[0], "[-message <message>] [-genesis <path>]")
flag.PrintDefaults()
fmt.Fprintln(os.Stderr, `
Verifies PoP signatures for the genesis block.`)
}
}
type genesisItem struct {
Address string `json:"address"`
BLSPublicKey string `json:"blsPublicKey"`
BLSPoP string `json:"blsPop"`
}
type genesisJson = []genesisItem
func main() {
flag.Parse()
if *message == "" {
panic(errors.New("message is not set"))
}
if *genesis == "" {
panic(errors.New("genesis file is not set"))
}
data, err := ioutil.ReadFile(*genesis)
check(err)
run(*message, data)
}
func run(message string, data []byte) {
var genesisData genesisJson
err := json.Unmarshal(data, &genesisData)
check(err)
messageBytes := common.HexToAddress(message)
for _, v := range genesisData {
address, err := hex.DecodeString(v.Address)
check(err)
blsPublicKey, err := hex.DecodeString(v.BLSPublicKey)
check(err)
blsPop, err := hex.DecodeString(v.BLSPoP)
check(err)
publicKey, err := bls.DeserializePublicKey(blsPublicKey)
check(err)
signature, err := bls.DeserializeSignature(blsPop)
check(err)
err = publicKey.VerifyPoP(messageBytes.Bytes(), signature)
check(err)
fmt.Printf("PoP for signer %x is verified\n", address)
}
}
func check(e error) {
if e != nil {
panic(e)
}
}