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path: root/cmd/puppeth/wizard_node.go
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// Copyright 2017 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/>.

package main

import (
    "encoding/json"
    "fmt"
    "time"

    "github.com/ethereum/go-ethereum/accounts/keystore"
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/log"
)

// deployNode creates a new node configuration based on some user input.
func (w *wizard) deployNode(boot bool) {
    // Do some sanity check before the user wastes time on input
    if w.conf.Genesis == nil {
        log.Error("No genesis block configured")
        return
    }
    if w.conf.ethstats == "" {
        log.Error("No ethstats server configured")
        return
    }
    // Select the server to interact with
    server := w.selectServer()
    if server == "" {
        return
    }
    client := w.servers[server]

    // Retrieve any active node configurations from the server
    infos, err := checkNode(client, w.network, boot)
    if err != nil {
        if boot {
            infos = &nodeInfos{port: 30303, peersTotal: 512, peersLight: 256}
        } else {
            infos = &nodeInfos{port: 30303, peersTotal: 50, peersLight: 0, gasTarget: 4.7, gasPrice: 18}
        }
    }
    existed := err == nil

    infos.genesis, _ = json.MarshalIndent(w.conf.Genesis, "", "  ")
    infos.network = w.conf.Genesis.Config.ChainId.Int64()

    // Figure out where the user wants to store the persistent data
    fmt.Println()
    if infos.datadir == "" {
        fmt.Printf("Where should data be stored on the remote machine?\n")
        infos.datadir = w.readString()
    } else {
        fmt.Printf("Where should data be stored on the remote machine? (default = %s)\n", infos.datadir)
        infos.datadir = w.readDefaultString(infos.datadir)
    }
    if w.conf.Genesis.Config.Ethash != nil && !boot {
        fmt.Println()
        if infos.ethashdir == "" {
            fmt.Printf("Where should the ethash mining DAGs be stored on the remote machine?\n")
            infos.ethashdir = w.readString()
        } else {
            fmt.Printf("Where should the ethash mining DAGs be stored on the remote machine? (default = %s)\n", infos.ethashdir)
            infos.ethashdir = w.readDefaultString(infos.ethashdir)
        }
    }
    // Figure out which port to listen on
    fmt.Println()
    fmt.Printf("Which TCP/UDP port to listen on? (default = %d)\n", infos.port)
    infos.port = w.readDefaultInt(infos.port)

    // Figure out how many peers to allow (different based on node type)
    fmt.Println()
    fmt.Printf("How many peers to allow connecting? (default = %d)\n", infos.peersTotal)
    infos.peersTotal = w.readDefaultInt(infos.peersTotal)

    // Figure out how many light peers to allow (different based on node type)
    fmt.Println()
    fmt.Printf("How many light peers to allow connecting? (default = %d)\n", infos.peersLight)
    infos.peersLight = w.readDefaultInt(infos.peersLight)

    // Set a proper name to report on the stats page
    fmt.Println()
    if infos.ethstats == "" {
        fmt.Printf("What should the node be called on the stats page?\n")
        infos.ethstats = w.readString() + ":" + w.conf.ethstats
    } else {
        fmt.Printf("What should the node be called on the stats page? (default = %s)\n", infos.ethstats)
        infos.ethstats = w.readDefaultString(infos.ethstats) + ":" + w.conf.ethstats
    }
    // If the node is a miner/signer, load up needed credentials
    if !boot {
        if w.conf.Genesis.Config.Ethash != nil {
            // Ethash based miners only need an etherbase to mine against
            fmt.Println()
            if infos.etherbase == "" {
                fmt.Printf("What address should the miner user?\n")
                for {
                    if address := w.readAddress(); address != nil {
                        infos.etherbase = address.Hex()
                        break
                    }
                }
            } else {
                fmt.Printf("What address should the miner user? (default = %s)\n", infos.etherbase)
                infos.etherbase = w.readDefaultAddress(common.HexToAddress(infos.etherbase)).Hex()
            }
        } else if w.conf.Genesis.Config.Clique != nil {
            // If a previous signer was already set, offer to reuse it
            if infos.keyJSON != "" {
                if key, err := keystore.DecryptKey([]byte(infos.keyJSON), infos.keyPass); err != nil {
                    infos.keyJSON, infos.keyPass = "", ""
                } else {
                    fmt.Println()
                    fmt.Printf("Reuse previous (%s) signing account (y/n)? (default = yes)\n", key.Address.Hex())
                    if w.readDefaultString("y") != "y" {
                        infos.keyJSON, infos.keyPass = "", ""
                    }
                }
            }
            // Clique based signers need a keyfile and unlock password, ask if unavailable
            if infos.keyJSON == "" {
                fmt.Println()
                fmt.Println("Please paste the signer's key JSON:")
                infos.keyJSON = w.readJSON()

                fmt.Println()
                fmt.Println("What's the unlock password for the account? (won't be echoed)")
                infos.keyPass = w.readPassword()

                if _, err := keystore.DecryptKey([]byte(infos.keyJSON), infos.keyPass); err != nil {
                    log.Error("Failed to decrypt key with given passphrase")
                    return
                }
            }
        }
        // Establish the gas dynamics to be enforced by the signer
        fmt.Println()
        fmt.Printf("What gas limit should empty blocks target (MGas)? (default = %0.3f)\n", infos.gasTarget)
        infos.gasTarget = w.readDefaultFloat(infos.gasTarget)

        fmt.Println()
        fmt.Printf("What gas price should the signer require (GWei)? (default = %0.3f)\n", infos.gasPrice)
        infos.gasPrice = w.readDefaultFloat(infos.gasPrice)
    }
    // Try to deploy the full node on the host
    nocache := false
    if existed {
        fmt.Println()
        fmt.Printf("Should the node be built from scratch (y/n)? (default = no)\n")
        nocache = w.readDefaultString("n") != "n"
    }
    if out, err := deployNode(client, w.network, w.conf.bootnodes, infos, nocache); err != nil {
        log.Error("Failed to deploy Ethereum node container", "err", err)
        if len(out) > 0 {
            fmt.Printf("%s\n", out)
        }
        return
    }
    // All ok, run a network scan to pick any changes up
    log.Info("Waiting for node to finish booting")
    time.Sleep(3 * time.Second)

    w.networkStats()
}