323 lines
9.8 KiB
Go
323 lines
9.8 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 swarm
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import (
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"bytes"
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"crypto/ecdsa"
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"fmt"
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"github.com/ethereum/go-ethereum/accounts/abi/bind"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/contracts/chequebook"
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"github.com/ethereum/go-ethereum/contracts/ens"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/node"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/discover"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/ethereum/go-ethereum/swarm/api"
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httpapi "github.com/ethereum/go-ethereum/swarm/api/http"
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"github.com/ethereum/go-ethereum/swarm/network"
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"github.com/ethereum/go-ethereum/swarm/storage"
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"golang.org/x/net/context"
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)
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// the swarm stack
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type Swarm struct {
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config *api.Config // swarm configuration
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api *api.Api // high level api layer (fs/manifest)
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dns api.Resolver // DNS registrar
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dbAccess *network.DbAccess // access to local chunk db iterator and storage counter
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storage storage.ChunkStore // internal access to storage, common interface to cloud storage backends
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dpa *storage.DPA // distributed preimage archive, the local API to the storage with document level storage/retrieval support
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depo network.StorageHandler // remote request handler, interface between bzz protocol and the storage
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cloud storage.CloudStore // procurement, cloud storage backend (can multi-cloud)
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hive *network.Hive // the logistic manager
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backend chequebook.Backend // simple blockchain Backend
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privateKey *ecdsa.PrivateKey
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corsString string
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swapEnabled bool
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lstore *storage.LocalStore // local store, needs to store for releasing resources after node stopped
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}
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type SwarmAPI struct {
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Api *api.Api
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Backend chequebook.Backend
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PrvKey *ecdsa.PrivateKey
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}
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func (self *Swarm) API() *SwarmAPI {
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return &SwarmAPI{
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Api: self.api,
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Backend: self.backend,
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PrvKey: self.privateKey,
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}
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}
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// creates a new swarm service instance
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// implements node.Service
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func NewSwarm(ctx *node.ServiceContext, backend chequebook.Backend, config *api.Config, swapEnabled, syncEnabled bool, cors string) (self *Swarm, err error) {
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if bytes.Equal(common.FromHex(config.PublicKey), storage.ZeroKey) {
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return nil, fmt.Errorf("empty public key")
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}
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if bytes.Equal(common.FromHex(config.BzzKey), storage.ZeroKey) {
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return nil, fmt.Errorf("empty bzz key")
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}
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self = &Swarm{
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config: config,
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swapEnabled: swapEnabled,
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backend: backend,
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privateKey: config.Swap.PrivateKey(),
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corsString: cors,
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}
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log.Debug(fmt.Sprintf("Setting up Swarm service components"))
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hash := storage.MakeHashFunc(config.ChunkerParams.Hash)
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self.lstore, err = storage.NewLocalStore(hash, config.StoreParams)
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if err != nil {
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return
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}
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// setup local store
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log.Debug(fmt.Sprintf("Set up local storage"))
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self.dbAccess = network.NewDbAccess(self.lstore)
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log.Debug(fmt.Sprintf("Set up local db access (iterator/counter)"))
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// set up the kademlia hive
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self.hive = network.NewHive(
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common.HexToHash(self.config.BzzKey), // key to hive (kademlia base address)
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config.HiveParams, // configuration parameters
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swapEnabled, // SWAP enabled
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syncEnabled, // syncronisation enabled
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)
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log.Debug(fmt.Sprintf("Set up swarm network with Kademlia hive"))
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// setup cloud storage backend
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cloud := network.NewForwarder(self.hive)
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log.Debug(fmt.Sprintf("-> set swarm forwarder as cloud storage backend"))
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// setup cloud storage internal access layer
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self.storage = storage.NewNetStore(hash, self.lstore, cloud, config.StoreParams)
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log.Debug(fmt.Sprintf("-> swarm net store shared access layer to Swarm Chunk Store"))
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// set up Depo (storage handler = cloud storage access layer for incoming remote requests)
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self.depo = network.NewDepo(hash, self.lstore, self.storage)
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log.Debug(fmt.Sprintf("-> REmote Access to CHunks"))
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// set up DPA, the cloud storage local access layer
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dpaChunkStore := storage.NewDpaChunkStore(self.lstore, self.storage)
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log.Debug(fmt.Sprintf("-> Local Access to Swarm"))
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// Swarm Hash Merklised Chunking for Arbitrary-length Document/File storage
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self.dpa = storage.NewDPA(dpaChunkStore, self.config.ChunkerParams)
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log.Debug(fmt.Sprintf("-> Content Store API"))
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// set up high level api
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transactOpts := bind.NewKeyedTransactor(self.privateKey)
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self.dns, err = ens.NewENS(transactOpts, config.EnsRoot, self.backend)
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if err != nil {
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return nil, err
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}
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log.Debug(fmt.Sprintf("-> Swarm Domain Name Registrar @ address %v", config.EnsRoot.Hex()))
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self.api = api.NewApi(self.dpa, self.dns)
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// Manifests for Smart Hosting
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log.Debug(fmt.Sprintf("-> Web3 virtual server API"))
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return self, nil
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}
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/*
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Start is called when the stack is started
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* starts the network kademlia hive peer management
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* (starts netStore level 0 api)
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* starts DPA level 1 api (chunking -> store/retrieve requests)
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* (starts level 2 api)
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* starts http proxy server
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* registers url scheme handlers for bzz, etc
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* TODO: start subservices like sword, swear, swarmdns
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*/
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// implements the node.Service interface
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func (self *Swarm) Start(net *p2p.Server) error {
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connectPeer := func(url string) error {
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node, err := discover.ParseNode(url)
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if err != nil {
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return fmt.Errorf("invalid node URL: %v", err)
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}
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net.AddPeer(node)
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return nil
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}
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// set chequebook
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if self.swapEnabled {
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ctx := context.Background() // The initial setup has no deadline.
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err := self.SetChequebook(ctx)
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if err != nil {
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return fmt.Errorf("Unable to set chequebook for SWAP: %v", err)
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}
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log.Debug(fmt.Sprintf("-> cheque book for SWAP: %v", self.config.Swap.Chequebook()))
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} else {
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log.Debug(fmt.Sprintf("SWAP disabled: no cheque book set"))
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}
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log.Warn(fmt.Sprintf("Starting Swarm service"))
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self.hive.Start(
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discover.PubkeyID(&net.PrivateKey.PublicKey),
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func() string { return net.ListenAddr },
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connectPeer,
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)
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log.Info(fmt.Sprintf("Swarm network started on bzz address: %v", self.hive.Addr()))
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self.dpa.Start()
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log.Debug(fmt.Sprintf("Swarm DPA started"))
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// start swarm http proxy server
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if self.config.Port != "" {
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addr := ":" + self.config.Port
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go httpapi.StartHttpServer(self.api, &httpapi.Server{Addr: addr, CorsString: self.corsString})
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}
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log.Debug(fmt.Sprintf("Swarm http proxy started on port: %v", self.config.Port))
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if self.corsString != "" {
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log.Debug(fmt.Sprintf("Swarm http proxy started with corsdomain: %v", self.corsString))
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}
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return nil
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}
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// implements the node.Service interface
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// stops all component services.
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func (self *Swarm) Stop() error {
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self.dpa.Stop()
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self.hive.Stop()
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if ch := self.config.Swap.Chequebook(); ch != nil {
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ch.Stop()
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ch.Save()
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}
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if self.lstore != nil {
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self.lstore.DbStore.Close()
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}
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return self.config.Save()
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}
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// implements the node.Service interface
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func (self *Swarm) Protocols() []p2p.Protocol {
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proto, err := network.Bzz(self.depo, self.backend, self.hive, self.dbAccess, self.config.Swap, self.config.SyncParams, self.config.NetworkId)
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if err != nil {
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return nil
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}
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return []p2p.Protocol{proto}
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}
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// implements node.Service
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// Apis returns the RPC Api descriptors the Swarm implementation offers
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func (self *Swarm) APIs() []rpc.API {
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return []rpc.API{
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// public APIs
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{
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Namespace: "bzz",
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Version: "0.1",
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Service: api.NewStorage(self.api),
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Public: true,
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},
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{
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Namespace: "bzz",
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Version: "0.1",
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Service: &Info{self.config, chequebook.ContractParams},
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Public: true,
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},
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// admin APIs
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{
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Namespace: "bzz",
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Version: "0.1",
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Service: api.NewFileSystem(self.api),
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Public: false},
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{
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Namespace: "bzz",
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Version: "0.1",
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Service: api.NewControl(self.api, self.hive),
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Public: false,
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},
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{
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Namespace: "chequebook",
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Version: chequebook.Version,
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Service: chequebook.NewApi(self.config.Swap.Chequebook),
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Public: false,
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},
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// {Namespace, Version, api.NewAdmin(self), false},
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}
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}
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func (self *Swarm) Api() *api.Api {
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return self.api
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}
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// SetChequebook ensures that the local checquebook is set up on chain.
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func (self *Swarm) SetChequebook(ctx context.Context) error {
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err := self.config.Swap.SetChequebook(ctx, self.backend, self.config.Path)
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if err != nil {
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return err
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}
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log.Info(fmt.Sprintf("new chequebook set (%v): saving config file, resetting all connections in the hive", self.config.Swap.Contract.Hex()))
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self.config.Save()
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self.hive.DropAll()
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return nil
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}
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// Local swarm without netStore
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func NewLocalSwarm(datadir, port string) (self *Swarm, err error) {
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prvKey, err := crypto.GenerateKey()
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if err != nil {
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return
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}
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config, err := api.NewConfig(datadir, common.Address{}, prvKey, network.NetworkId)
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if err != nil {
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return
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}
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config.Port = port
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dpa, err := storage.NewLocalDPA(datadir)
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if err != nil {
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return
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}
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self = &Swarm{
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api: api.NewApi(dpa, nil),
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config: config,
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}
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return
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}
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// serialisable info about swarm
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type Info struct {
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*api.Config
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*chequebook.Params
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}
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func (self *Info) Info() *Info {
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return self
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}
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