forked from cerc-io/ipld-eth-server
5a652190d9
* Upgrade go-ethereum to v1.8 * Add Node Info for parity nodes * Upgrade start_private_blockchain to use v1.8
469 lines
14 KiB
Go
469 lines
14 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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"context"
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"crypto/ecdsa"
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"fmt"
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"math/big"
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"net"
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"strings"
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"time"
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"unicode"
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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/ethclient"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/metrics"
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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/params"
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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/fuse"
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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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)
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var (
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startTime time.Time
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updateGaugesPeriod = 5 * time.Second
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startCounter = metrics.NewRegisteredCounter("stack,start", nil)
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stopCounter = metrics.NewRegisteredCounter("stack,stop", nil)
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uptimeGauge = metrics.NewRegisteredGauge("stack.uptime", nil)
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dbSizeGauge = metrics.NewRegisteredGauge("storage.db.chunks.size", nil)
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cacheSizeGauge = metrics.NewRegisteredGauge("storage.db.cache.size", nil)
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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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sfs *fuse.SwarmFS // need this to cleanup all the active mounts on node exit
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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) (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: config.SwapEnabled,
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backend: backend,
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privateKey: config.Swap.PrivateKey(),
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corsString: config.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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config.SwapEnabled, // SWAP enabled
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config.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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self.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, self.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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if len(config.EnsAPIs) > 0 {
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opts := []api.MultiResolverOption{}
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for _, c := range config.EnsAPIs {
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tld, endpoint, addr := parseEnsAPIAddress(c)
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r, err := newEnsClient(endpoint, addr, config)
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if err != nil {
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return nil, err
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}
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opts = append(opts, api.MultiResolverOptionWithResolver(r, tld))
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}
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self.dns = api.NewMultiResolver(opts...)
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}
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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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self.sfs = fuse.NewSwarmFS(self.api)
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log.Debug("-> Initializing Fuse file system")
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return self, nil
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}
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// parseEnsAPIAddress parses string according to format
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// [tld:][contract-addr@]url and returns ENSClientConfig structure
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// with endpoint, contract address and TLD.
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func parseEnsAPIAddress(s string) (tld, endpoint string, addr common.Address) {
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isAllLetterString := func(s string) bool {
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for _, r := range s {
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if !unicode.IsLetter(r) {
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return false
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}
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}
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return true
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}
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endpoint = s
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if i := strings.Index(endpoint, ":"); i > 0 {
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if isAllLetterString(endpoint[:i]) && len(endpoint) > i+2 && endpoint[i+1:i+3] != "//" {
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tld = endpoint[:i]
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endpoint = endpoint[i+1:]
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}
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}
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if i := strings.Index(endpoint, "@"); i > 0 {
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addr = common.HexToAddress(endpoint[:i])
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endpoint = endpoint[i+1:]
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}
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return
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}
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// newEnsClient creates a new ENS client for that is a consumer of
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// a ENS API on a specific endpoint. It is used as a helper function
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// for creating multiple resolvers in NewSwarm function.
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func newEnsClient(endpoint string, addr common.Address, config *api.Config) (*ens.ENS, error) {
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log.Info("connecting to ENS API", "url", endpoint)
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client, err := rpc.Dial(endpoint)
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if err != nil {
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return nil, fmt.Errorf("error connecting to ENS API %s: %s", endpoint, err)
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}
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ensClient := ethclient.NewClient(client)
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ensRoot := config.EnsRoot
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if addr != (common.Address{}) {
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ensRoot = addr
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} else {
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a, err := detectEnsAddr(client)
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if err == nil {
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ensRoot = a
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} else {
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log.Warn(fmt.Sprintf("could not determine ENS contract address, using default %s", ensRoot), "err", err)
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}
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}
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transactOpts := bind.NewKeyedTransactor(config.Swap.PrivateKey())
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dns, err := ens.NewENS(transactOpts, ensRoot, ensClient)
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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 %v @ address %v", endpoint, ensRoot.Hex()))
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return dns, err
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}
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// detectEnsAddr determines the ENS contract address by getting both the
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// version and genesis hash using the client and matching them to either
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// mainnet or testnet addresses
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func detectEnsAddr(client *rpc.Client) (common.Address, error) {
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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var version string
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if err := client.CallContext(ctx, &version, "net_version"); err != nil {
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return common.Address{}, err
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}
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block, err := ethclient.NewClient(client).BlockByNumber(ctx, big.NewInt(0))
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if err != nil {
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return common.Address{}, err
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}
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switch {
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case version == "1" && block.Hash() == params.MainnetGenesisHash:
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log.Info("using Mainnet ENS contract address", "addr", ens.MainNetAddress)
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return ens.MainNetAddress, nil
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case version == "3" && block.Hash() == params.TestnetGenesisHash:
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log.Info("using Testnet ENS contract address", "addr", ens.TestNetAddress)
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return ens.TestNetAddress, nil
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default:
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return common.Address{}, fmt.Errorf("unknown version and genesis hash: %s %s", version, block.Hash())
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}
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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(srv *p2p.Server) error {
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startTime = time.Now()
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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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srv.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(&srv.PrivateKey.PublicKey),
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func() string { return srv.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 := net.JoinHostPort(self.config.ListenAddr, self.config.Port)
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go httpapi.StartHttpServer(self.api, &httpapi.ServerConfig{
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Addr: addr,
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CorsString: self.corsString,
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})
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log.Info(fmt.Sprintf("Swarm http proxy started on %v", addr))
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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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}
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self.periodicallyUpdateGauges()
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startCounter.Inc(1)
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return nil
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}
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func (self *Swarm) periodicallyUpdateGauges() {
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ticker := time.NewTicker(updateGaugesPeriod)
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go func() {
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for range ticker.C {
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self.updateGauges()
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}
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}()
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}
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func (self *Swarm) updateGauges() {
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dbSizeGauge.Update(int64(self.lstore.DbCounter()))
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cacheSizeGauge.Update(int64(self.lstore.CacheCounter()))
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uptimeGauge.Update(time.Since(startTime).Nanoseconds())
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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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err := 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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self.sfs.Stop()
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stopCounter.Inc(1)
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return err
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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: &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.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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{
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Namespace: "swarmfs",
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Version: fuse.Swarmfs_Version,
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Service: self.sfs,
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Public: false,
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},
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// storage APIs
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// DEPRECATED: Use the HTTP API instead
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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: api.NewFileSystem(self.api),
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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.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 := api.NewDefaultConfig()
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config.Path = datadir
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config.Init(prvKey)
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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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