300 lines
10 KiB
Go
300 lines
10 KiB
Go
// Copyright 2017 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU 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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// go-ethereum 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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package main
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"math/big"
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"math/rand"
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"net/http"
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"os"
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"path/filepath"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/params"
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)
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// makeGenesis creates a new genesis struct based on some user input.
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func (w *wizard) makeGenesis() {
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// Construct a default genesis block
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genesis := &core.Genesis{
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Timestamp: uint64(time.Now().Unix()),
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GasLimit: 4700000,
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Difficulty: big.NewInt(524288),
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Alloc: make(core.GenesisAlloc),
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Config: ¶ms.ChainConfig{
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HomesteadBlock: big.NewInt(1),
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EIP150Block: big.NewInt(2),
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EIP155Block: big.NewInt(3),
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EIP158Block: big.NewInt(3),
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ByzantiumBlock: big.NewInt(4),
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ConstantinopleBlock: big.NewInt(5),
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},
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}
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// Figure out which consensus engine to choose
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fmt.Println()
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fmt.Println("Which consensus engine to use? (default = clique)")
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fmt.Println(" 1. Ethash - proof-of-work")
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fmt.Println(" 2. Clique - proof-of-authority")
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choice := w.read()
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switch {
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case choice == "1":
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// In case of ethash, we're pretty much done
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genesis.Config.Ethash = new(params.EthashConfig)
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genesis.ExtraData = make([]byte, 32)
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case choice == "" || choice == "2":
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// In the case of clique, configure the consensus parameters
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genesis.Difficulty = big.NewInt(1)
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genesis.Config.Clique = ¶ms.CliqueConfig{
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Period: 15,
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Epoch: 30000,
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}
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fmt.Println()
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fmt.Println("How many seconds should blocks take? (default = 15)")
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genesis.Config.Clique.Period = uint64(w.readDefaultInt(15))
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// We also need the initial list of signers
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fmt.Println()
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fmt.Println("Which accounts are allowed to seal? (mandatory at least one)")
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var signers []common.Address
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for {
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if address := w.readAddress(); address != nil {
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signers = append(signers, *address)
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continue
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}
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if len(signers) > 0 {
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break
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}
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}
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// Sort the signers and embed into the extra-data section
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for i := 0; i < len(signers); i++ {
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for j := i + 1; j < len(signers); j++ {
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if bytes.Compare(signers[i][:], signers[j][:]) > 0 {
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signers[i], signers[j] = signers[j], signers[i]
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}
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}
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}
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genesis.ExtraData = make([]byte, 32+len(signers)*common.AddressLength+65)
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for i, signer := range signers {
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copy(genesis.ExtraData[32+i*common.AddressLength:], signer[:])
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}
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default:
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log.Crit("Invalid consensus engine choice", "choice", choice)
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}
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// Consensus all set, just ask for initial funds and go
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fmt.Println()
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fmt.Println("Which accounts should be pre-funded? (advisable at least one)")
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for {
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// Read the address of the account to fund
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if address := w.readAddress(); address != nil {
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genesis.Alloc[*address] = core.GenesisAccount{
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Balance: new(big.Int).Lsh(big.NewInt(1), 256-7), // 2^256 / 128 (allow many pre-funds without balance overflows)
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}
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continue
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}
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break
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}
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fmt.Println()
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fmt.Println("Should the precompile-addresses (0x1 .. 0xff) be pre-funded with 1 wei? (advisable yes)")
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if w.readDefaultYesNo(true) {
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// Add a batch of precompile balances to avoid them getting deleted
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for i := int64(0); i < 256; i++ {
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genesis.Alloc[common.BigToAddress(big.NewInt(i))] = core.GenesisAccount{Balance: big.NewInt(1)}
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}
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}
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// Query the user for some custom extras
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fmt.Println()
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fmt.Println("Specify your chain/network ID if you want an explicit one (default = random)")
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genesis.Config.ChainID = new(big.Int).SetUint64(uint64(w.readDefaultInt(rand.Intn(65536))))
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// All done, store the genesis and flush to disk
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log.Info("Configured new genesis block")
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w.conf.Genesis = genesis
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w.conf.flush()
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}
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// importGenesis imports a Geth genesis spec into puppeth.
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func (w *wizard) importGenesis() {
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// Request the genesis JSON spec URL from the user
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fmt.Println()
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fmt.Println("Where's the genesis file? (local file or http/https url)")
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url := w.readURL()
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// Convert the various allowed URLs to a reader stream
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var reader io.Reader
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switch url.Scheme {
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case "http", "https":
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// Remote web URL, retrieve it via an HTTP client
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res, err := http.Get(url.String())
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if err != nil {
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log.Error("Failed to retrieve remote genesis", "err", err)
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return
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}
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defer res.Body.Close()
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reader = res.Body
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case "":
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// Schemaless URL, interpret as a local file
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file, err := os.Open(url.String())
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if err != nil {
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log.Error("Failed to open local genesis", "err", err)
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return
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}
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defer file.Close()
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reader = file
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default:
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log.Error("Unsupported genesis URL scheme", "scheme", url.Scheme)
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return
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}
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// Parse the genesis file and inject it successful
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var genesis core.Genesis
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if err := json.NewDecoder(reader).Decode(&genesis); err != nil {
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log.Error("Invalid genesis spec: %v", err)
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return
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}
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log.Info("Imported genesis block")
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w.conf.Genesis = &genesis
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w.conf.flush()
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}
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// manageGenesis permits the modification of chain configuration parameters in
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// a genesis config and the export of the entire genesis spec.
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func (w *wizard) manageGenesis() {
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// Figure out whether to modify or export the genesis
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fmt.Println()
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fmt.Println(" 1. Modify existing fork rules")
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fmt.Println(" 2. Export genesis configurations")
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fmt.Println(" 3. Remove genesis configuration")
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choice := w.read()
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switch choice {
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case "1":
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// Fork rule updating requested, iterate over each fork
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fmt.Println()
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fmt.Printf("Which block should Homestead come into effect? (default = %v)\n", w.conf.Genesis.Config.HomesteadBlock)
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w.conf.Genesis.Config.HomesteadBlock = w.readDefaultBigInt(w.conf.Genesis.Config.HomesteadBlock)
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fmt.Println()
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fmt.Printf("Which block should EIP150 (Tangerine Whistle) come into effect? (default = %v)\n", w.conf.Genesis.Config.EIP150Block)
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w.conf.Genesis.Config.EIP150Block = w.readDefaultBigInt(w.conf.Genesis.Config.EIP150Block)
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fmt.Println()
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fmt.Printf("Which block should EIP155 (Spurious Dragon) come into effect? (default = %v)\n", w.conf.Genesis.Config.EIP155Block)
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w.conf.Genesis.Config.EIP155Block = w.readDefaultBigInt(w.conf.Genesis.Config.EIP155Block)
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fmt.Println()
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fmt.Printf("Which block should EIP158/161 (also Spurious Dragon) come into effect? (default = %v)\n", w.conf.Genesis.Config.EIP158Block)
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w.conf.Genesis.Config.EIP158Block = w.readDefaultBigInt(w.conf.Genesis.Config.EIP158Block)
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fmt.Println()
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fmt.Printf("Which block should Byzantium come into effect? (default = %v)\n", w.conf.Genesis.Config.ByzantiumBlock)
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w.conf.Genesis.Config.ByzantiumBlock = w.readDefaultBigInt(w.conf.Genesis.Config.ByzantiumBlock)
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fmt.Println()
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fmt.Printf("Which block should Constantinople come into effect? (default = %v)\n", w.conf.Genesis.Config.ConstantinopleBlock)
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w.conf.Genesis.Config.ConstantinopleBlock = w.readDefaultBigInt(w.conf.Genesis.Config.ConstantinopleBlock)
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if w.conf.Genesis.Config.PetersburgBlock == nil {
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w.conf.Genesis.Config.PetersburgBlock = w.conf.Genesis.Config.ConstantinopleBlock
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}
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fmt.Println()
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fmt.Printf("Which block should Constantinople-Fix (remove EIP-1283) come into effect? (default = %v)\n", w.conf.Genesis.Config.PetersburgBlock)
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w.conf.Genesis.Config.PetersburgBlock = w.readDefaultBigInt(w.conf.Genesis.Config.PetersburgBlock)
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out, _ := json.MarshalIndent(w.conf.Genesis.Config, "", " ")
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fmt.Printf("Chain configuration updated:\n\n%s\n", out)
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w.conf.flush()
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case "2":
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// Save whatever genesis configuration we currently have
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fmt.Println()
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fmt.Printf("Which folder to save the genesis specs into? (default = current)\n")
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fmt.Printf(" Will create %s.json, %s-aleth.json, %s-harmony.json, %s-parity.json\n", w.network, w.network, w.network, w.network)
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folder := w.readDefaultString(".")
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if err := os.MkdirAll(folder, 0755); err != nil {
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log.Error("Failed to create spec folder", "folder", folder, "err", err)
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return
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}
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out, _ := json.MarshalIndent(w.conf.Genesis, "", " ")
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// Export the native genesis spec used by puppeth and Geth
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gethJson := filepath.Join(folder, fmt.Sprintf("%s.json", w.network))
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if err := ioutil.WriteFile((gethJson), out, 0644); err != nil {
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log.Error("Failed to save genesis file", "err", err)
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return
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}
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log.Info("Saved native genesis chain spec", "path", gethJson)
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// Export the genesis spec used by Aleth (formerly C++ Ethereum)
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if spec, err := newAlethGenesisSpec(w.network, w.conf.Genesis); err != nil {
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log.Error("Failed to create Aleth chain spec", "err", err)
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} else {
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saveGenesis(folder, w.network, "aleth", spec)
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}
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// Export the genesis spec used by Parity
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if spec, err := newParityChainSpec(w.network, w.conf.Genesis, []string{}); err != nil {
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log.Error("Failed to create Parity chain spec", "err", err)
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} else {
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saveGenesis(folder, w.network, "parity", spec)
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}
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// Export the genesis spec used by Harmony (formerly EthereumJ
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saveGenesis(folder, w.network, "harmony", w.conf.Genesis)
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case "3":
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// Make sure we don't have any services running
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if len(w.conf.servers()) > 0 {
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log.Error("Genesis reset requires all services and servers torn down")
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return
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}
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log.Info("Genesis block destroyed")
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w.conf.Genesis = nil
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w.conf.flush()
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default:
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log.Error("That's not something I can do")
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return
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}
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}
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// saveGenesis JSON encodes an arbitrary genesis spec into a pre-defined file.
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func saveGenesis(folder, network, client string, spec interface{}) {
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path := filepath.Join(folder, fmt.Sprintf("%s-%s.json", network, client))
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out, _ := json.Marshal(spec)
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if err := ioutil.WriteFile(path, out, 0644); err != nil {
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log.Error("Failed to save genesis file", "client", client, "err", err)
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return
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}
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log.Info("Saved genesis chain spec", "client", client, "path", path)
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}
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