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// 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/common/hexutil"
"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/enode"
"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
// LocalStore
ChunkDbPath string
DbCapacity uint64
CacheCapacity uint
BaseKey []byte
*network.HiveParams
Swap *swap.LocalProfile
Pss *pss.PssParams
Contract common.Address
EnsRoot common.Address
EnsAPIs []string
Path string
ListenAddr string
Port string
PublicKey string
BzzKey string
Enode *enode.Node `toml:"-"`
NetworkID uint64
SwapEnabled bool
SyncEnabled bool
SyncingSkipCheck bool
DeliverySkipCheck bool
MaxStreamPeerServers int
LightNodeEnabled bool
BootnodeMode bool
SyncUpdateDelay time.Duration
SwapAPI string
Cors string
BzzAccount string
GlobalStoreAPI string
privateKey *ecdsa.PrivateKey
}
//create a default config with all parameters to set to defaults
func NewConfig() (c *Config) {
c = &Config{
FileStoreParams: storage.NewFileStoreParams(),
HiveParams: network.NewHiveParams(),
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,
SyncingSkipCheck: false,
MaxStreamPeerServers: 10000,
DeliverySkipCheck: true,
SyncUpdateDelay: 15 * time.Second,
SwapAPI: "",
}
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, nodeKey *ecdsa.PrivateKey) error {
// create swarm dir and record key
err := c.createAndSetPath(c.Path, prvKey)
if err != nil {
return fmt.Errorf("Error creating root swarm data directory: %v", err)
}
c.setKey(prvKey)
// create the new enode record
// signed with the ephemeral node key
enodeParams := &network.EnodeParams{
PrivateKey: prvKey,
EnodeKey: nodeKey,
Lightnode: c.LightNodeEnabled,
Bootnode: c.BootnodeMode,
}
c.Enode, err = network.NewEnode(enodeParams)
if err != nil {
return fmt.Errorf("Error creating enode: %v", err)
}
// initialize components that depend on the swarm instance's private key
if c.SwapEnabled {
c.Swap.Init(c.Contract, prvKey)
}
c.privateKey = prvKey
c.ChunkDbPath = filepath.Join(c.Path, "chunks")
c.BaseKey = common.FromHex(c.BzzKey)
c.Pss = c.Pss.WithPrivateKey(c.privateKey)
return nil
}
func (c *Config) ShiftPrivateKey() (privKey *ecdsa.PrivateKey) {
if c.privateKey != nil {
privKey = c.privateKey
c.privateKey = nil
}
return privKey
}
func (c *Config) setKey(prvKey *ecdsa.PrivateKey) {
bzzkeybytes := network.PrivateKeyToBzzKey(prvKey)
pubkey := crypto.FromECDSAPub(&prvKey.PublicKey)
pubkeyhex := hexutil.Encode(pubkey)
keyhex := hexutil.Encode(bzzkeybytes)
c.privateKey = prvKey
c.PublicKey = pubkeyhex
c.BzzKey = keyhex
}
func (c *Config) createAndSetPath(datadirPath string, prvKey *ecdsa.PrivateKey) error {
address := crypto.PubkeyToAddress(prvKey.PublicKey)
bzzdirPath := filepath.Join(datadirPath, "bzz-"+common.Bytes2Hex(address.Bytes()))
err := os.MkdirAll(bzzdirPath, os.ModePerm)
if err != nil {
return err
}
c.Path = bzzdirPath
return nil
}
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