path: root/swarm/api/config.go

// Copyright 2016 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/>.

package api

import (
    "crypto/ecdsa"
    "fmt"
    "os"
    "path/filepath"
    "time"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/contracts/ens"
    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/node"
    "github.com/ethereum/go-ethereum/p2p/discover"
    "github.com/ethereum/go-ethereum/swarm/log"
    "github.com/ethereum/go-ethereum/swarm/network"
    "github.com/ethereum/go-ethereum/swarm/pss"
    "github.com/ethereum/go-ethereum/swarm/services/swap"
    "github.com/ethereum/go-ethereum/swarm/storage"
)

const (
    DefaultHTTPListenAddr = "127.0.0.1"
    DefaultHTTPPort       = "8500"
)

// separate bzz directories
// allow several bzz nodes running in parallel
type Config struct {
    // serialised/persisted fields
    *storage.FileStoreParams
    *storage.LocalStoreParams
    *network.HiveParams
    Swap *swap.LocalProfile
    Pss  *pss.PssParams
    //*network.SyncParams
    Contract          common.Address
    EnsRoot           common.Address
    EnsAPIs           []string
    Path              string
    ListenAddr        string
    Port              string
    PublicKey         string
    BzzKey            string
    NodeID            string
    NetworkID         uint64
    SwapEnabled       bool
    SyncEnabled       bool
    DeliverySkipCheck bool
    LightNodeEnabled  bool
    SyncUpdateDelay   time.Duration
    SwapAPI           string
    Cors              string
    BzzAccount        string
    BootNodes         string
    privateKey        *ecdsa.PrivateKey
}

//create a default config with all parameters to set to defaults
func NewConfig() (c *Config) {

    c = &Config{
        LocalStoreParams: storage.NewDefaultLocalStoreParams(),
        FileStoreParams:  storage.NewFileStoreParams(),
        HiveParams:       network.NewHiveParams(),
        //SyncParams:    network.NewDefaultSyncParams(),
        Swap:              swap.NewDefaultSwapParams(),
        Pss:               pss.NewPssParams(),
        ListenAddr:        DefaultHTTPListenAddr,
        Port:              DefaultHTTPPort,
        Path:              node.DefaultDataDir(),
        EnsAPIs:           nil,
        EnsRoot:           ens.TestNetAddress,
        NetworkID:         network.DefaultNetworkID,
        SwapEnabled:       false,
        SyncEnabled:       true,
        DeliverySkipCheck: false,
        SyncUpdateDelay:   15 * time.Second,
        SwapAPI:           "",
        BootNodes:         "",
    }

    return
}

//some config params need to be initialized after the complete
//config building phase is completed (e.g. due to overriding flags)
func (c *Config) Init(prvKey *ecdsa.PrivateKey) {

    address := crypto.PubkeyToAddress(prvKey.PublicKey)
    c.Path = filepath.Join(c.Path, "bzz-"+common.Bytes2Hex(address.Bytes()))
    err := os.MkdirAll(c.Path, os.ModePerm)
    if err != nil {
        log.Error(fmt.Sprintf("Error creating root swarm data directory: %v", err))
        return
    }

    pubkey := crypto.FromECDSAPub(&prvKey.PublicKey)
    pubkeyhex := common.ToHex(pubkey)
    keyhex := crypto.Keccak256Hash(pubkey).Hex()

    c.PublicKey = pubkeyhex
    c.BzzKey = keyhex
    c.NodeID = discover.PubkeyID(&prvKey.PublicKey).String()

    if c.SwapEnabled {
        c.Swap.Init(c.Contract, prvKey)
    }

    c.privateKey = prvKey
    c.LocalStoreParams.Init(c.Path)
    c.LocalStoreParams.BaseKey = common.FromHex(keyhex)

    c.Pss = c.Pss.WithPrivateKey(c.privateKey)
}

func (c *Config) ShiftPrivateKey() (privKey *ecdsa.PrivateKey) {
    if c.privateKey != nil {
        privKey = c.privateKey
        c.privateKey = nil
    }
    return privKey
}