133 lines
3.8 KiB
Go
133 lines
3.8 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser 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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// The go-ethereum library 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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package api
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import (
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"crypto/ecdsa"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/swarm/network"
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"github.com/ethereum/go-ethereum/swarm/services/swap"
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"github.com/ethereum/go-ethereum/swarm/storage"
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)
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const (
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port = "8500"
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)
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var (
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ensRootAddress = common.HexToAddress("0x112234455c3a32fd11230c42e7bccd4a84e02010")
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)
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// separate bzz directories
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// allow several bzz nodes running in parallel
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type Config struct {
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// serialised/persisted fields
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*storage.StoreParams
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*storage.ChunkerParams
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*network.HiveParams
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Swap *swap.SwapParams
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*network.SyncParams
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Path string
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Port string
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PublicKey string
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BzzKey string
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EnsRoot common.Address
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NetworkId uint64
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}
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// config is agnostic to where private key is coming from
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// so managing accounts is outside swarm and left to wrappers
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func NewConfig(path string, contract common.Address, prvKey *ecdsa.PrivateKey, networkId uint64) (self *Config, err error) {
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address := crypto.PubkeyToAddress(prvKey.PublicKey) // default beneficiary address
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dirpath := filepath.Join(path, "bzz-"+common.Bytes2Hex(address.Bytes()))
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err = os.MkdirAll(dirpath, os.ModePerm)
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if err != nil {
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return
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}
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confpath := filepath.Join(dirpath, "config.json")
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var data []byte
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pubkey := crypto.FromECDSAPub(&prvKey.PublicKey)
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pubkeyhex := common.ToHex(pubkey)
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keyhex := crypto.Sha3Hash(pubkey).Hex()
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self = &Config{
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SyncParams: network.NewSyncParams(dirpath),
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HiveParams: network.NewHiveParams(dirpath),
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ChunkerParams: storage.NewChunkerParams(),
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StoreParams: storage.NewStoreParams(dirpath),
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Port: port,
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Path: dirpath,
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Swap: swap.DefaultSwapParams(contract, prvKey),
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PublicKey: pubkeyhex,
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BzzKey: keyhex,
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EnsRoot: ensRootAddress,
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NetworkId: networkId,
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}
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data, err = ioutil.ReadFile(confpath)
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if err != nil {
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if !os.IsNotExist(err) {
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return
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}
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// file does not exist
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// write out config file
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err = self.Save()
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if err != nil {
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err = fmt.Errorf("error writing config: %v", err)
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}
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return
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}
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// file exists, deserialise
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err = json.Unmarshal(data, self)
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if err != nil {
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return nil, fmt.Errorf("unable to parse config: %v", err)
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}
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// check public key
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if pubkeyhex != self.PublicKey {
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return nil, fmt.Errorf("public key does not match the one in the config file %v != %v", pubkeyhex, self.PublicKey)
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}
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if keyhex != self.BzzKey {
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return nil, fmt.Errorf("bzz key does not match the one in the config file %v != %v", keyhex, self.BzzKey)
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}
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self.Swap.SetKey(prvKey)
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if (self.EnsRoot == common.Address{}) {
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self.EnsRoot = ensRootAddress
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}
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return
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}
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func (self *Config) Save() error {
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data, err := json.MarshalIndent(self, "", " ")
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if err != nil {
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return err
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}
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err = os.MkdirAll(self.Path, os.ModePerm)
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if err != nil {
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return err
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}
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confpath := filepath.Join(self.Path, "config.json")
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return ioutil.WriteFile(confpath, data, os.ModePerm)
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}
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