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service.go
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service.go
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package shhext
import (
"crypto/ecdsa"
"errors"
"fmt"
"os"
"path/filepath"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/rpc"
"github.com/status-im/status-go/db"
"github.com/status-im/status-go/params"
"github.com/status-im/status-go/services/shhext/chat"
"github.com/status-im/status-go/services/shhext/dedup"
"github.com/status-im/status-go/services/shhext/mailservers"
whisper "github.com/status-im/whisper/whisperv6"
"github.com/syndtr/goleveldb/leveldb"
"golang.org/x/crypto/sha3"
)
const (
// defaultConnectionsTarget used in Service.Start if configured connection target is 0.
defaultConnectionsTarget = 1
// defaultTimeoutWaitAdded is a timeout to use to establish initial connections.
defaultTimeoutWaitAdded = 5 * time.Second
)
var errProtocolNotInitialized = errors.New("procotol is not initialized")
// EnvelopeEventsHandler used for two different event types.
type EnvelopeEventsHandler interface {
EnvelopeSent(common.Hash)
EnvelopeExpired(common.Hash, error)
MailServerRequestCompleted(common.Hash, common.Hash, []byte, error)
MailServerRequestExpired(common.Hash)
}
// Service is a service that provides some additional Whisper API.
type Service struct {
storage db.TransactionalStorage
w *whisper.Whisper
config params.ShhextConfig
envelopesMonitor *EnvelopesMonitor
mailMonitor *MailRequestMonitor
requestsRegistry *RequestsRegistry
historyUpdates *HistoryUpdateReactor
server *p2p.Server
nodeID *ecdsa.PrivateKey
deduplicator *dedup.Deduplicator
protocol *chat.ProtocolService
dataDir string
installationID string
pfsEnabled bool
peerStore *mailservers.PeerStore
cache *mailservers.Cache
connManager *mailservers.ConnectionManager
lastUsedMonitor *mailservers.LastUsedConnectionMonitor
}
// Make sure that Service implements node.Service interface.
var _ node.Service = (*Service)(nil)
// New returns a new Service. dataDir is a folder path to a network-independent location
func New(w *whisper.Whisper, handler EnvelopeEventsHandler, ldb *leveldb.DB, config params.ShhextConfig) *Service {
cache := mailservers.NewCache(ldb)
ps := mailservers.NewPeerStore(cache)
delay := defaultRequestsDelay
if config.RequestsDelay != 0 {
delay = config.RequestsDelay
}
requestsRegistry := NewRequestsRegistry(delay)
historyUpdates := NewHistoryUpdateReactor()
mailMonitor := &MailRequestMonitor{
w: w,
handler: handler,
cache: map[common.Hash]EnvelopeState{},
requestsRegistry: requestsRegistry,
}
envelopesMonitor := NewEnvelopesMonitor(w, handler, config.MailServerConfirmations, ps, config.MaxMessageDeliveryAttempts)
return &Service{
storage: db.NewLevelDBStorage(ldb),
w: w,
config: config,
envelopesMonitor: envelopesMonitor,
mailMonitor: mailMonitor,
requestsRegistry: requestsRegistry,
historyUpdates: historyUpdates,
deduplicator: dedup.NewDeduplicator(w, ldb),
dataDir: config.BackupDisabledDataDir,
installationID: config.InstallationID,
pfsEnabled: config.PFSEnabled,
peerStore: ps,
cache: cache,
}
}
// UpdateMailservers updates information about selected mail servers.
func (s *Service) UpdateMailservers(nodes []*enode.Node) error {
if err := s.peerStore.Update(nodes); err != nil {
return err
}
if s.connManager != nil {
s.connManager.Notify(nodes)
}
return nil
}
// Protocols returns a new protocols list. In this case, there are none.
func (s *Service) Protocols() []p2p.Protocol {
return []p2p.Protocol{}
}
// InitProtocolWithPassword creates an instance of ProtocolService given an address and password used to generate an encryption key.
func (s *Service) InitProtocolWithPassword(address string, password string) error {
digest := sha3.Sum256([]byte(password))
encKey := fmt.Sprintf("%x", digest)
return s.initProtocol(address, encKey, password)
}
// InitProtocolWithEncyptionKey creates an instance of ProtocolService given an address and encryption key.
func (s *Service) InitProtocolWithEncyptionKey(address string, encKey string) error {
return s.initProtocol(address, encKey, "")
}
func (s *Service) initProtocol(address, encKey, password string) error {
if !s.pfsEnabled {
return nil
}
if err := os.MkdirAll(filepath.Clean(s.dataDir), os.ModePerm); err != nil {
return err
}
v0Path := filepath.Join(s.dataDir, fmt.Sprintf("%x.db", address))
v1Path := filepath.Join(s.dataDir, fmt.Sprintf("%s.db", s.installationID))
v2Path := filepath.Join(s.dataDir, fmt.Sprintf("%s.v2.db", s.installationID))
v3Path := filepath.Join(s.dataDir, fmt.Sprintf("%s.v3.db", s.installationID))
v4Path := filepath.Join(s.dataDir, fmt.Sprintf("%s.v4.db", s.installationID))
if password != "" {
if err := chat.MigrateDBFile(v0Path, v1Path, "ON", password); err != nil {
return err
}
if err := chat.MigrateDBFile(v1Path, v2Path, password, encKey); err != nil {
// Remove db file as created with a blank password and never used,
// and there's no need to rekey in this case
os.Remove(v1Path)
os.Remove(v2Path)
}
}
if err := chat.MigrateDBKeyKdfIterations(v2Path, v3Path, encKey); err != nil {
os.Remove(v2Path)
os.Remove(v3Path)
}
// Fix IOS not encrypting database
if err := chat.EncryptDatabase(v3Path, v4Path, encKey); err != nil {
os.Remove(v3Path)
os.Remove(v4Path)
}
// Desktop was passing a network dependent directory, which meant that
// if running on testnet it would not access the right db. This copies
// the db from mainnet to the root location.
networkDependentPath := filepath.Join(s.dataDir, "ethereum", "mainnet_rpc", fmt.Sprintf("%s.v4.db", s.installationID))
if _, err := os.Stat(networkDependentPath); err == nil {
if err := os.Rename(networkDependentPath, v4Path); err != nil {
return err
}
} else if !os.IsNotExist(err) {
return err
}
persistence, err := chat.NewSQLLitePersistence(v4Path, encKey)
if err != nil {
return err
}
addedBundlesHandler := func(addedBundles []chat.IdentityAndIDPair) {
handler := EnvelopeSignalHandler{}
for _, bundle := range addedBundles {
handler.BundleAdded(bundle[0], bundle[1])
}
}
s.protocol = chat.NewProtocolService(chat.NewEncryptionService(persistence, chat.DefaultEncryptionServiceConfig(s.installationID)), addedBundlesHandler)
return nil
}
func (s *Service) ProcessPublicBundle(myIdentityKey *ecdsa.PrivateKey, bundle *chat.Bundle) ([]chat.IdentityAndIDPair, error) {
if s.protocol == nil {
return nil, errProtocolNotInitialized
}
return s.protocol.ProcessPublicBundle(myIdentityKey, bundle)
}
func (s *Service) GetBundle(myIdentityKey *ecdsa.PrivateKey) (*chat.Bundle, error) {
if s.protocol == nil {
return nil, errProtocolNotInitialized
}
return s.protocol.GetBundle(myIdentityKey)
}
// EnableInstallation enables an installation for multi-device sync.
func (s *Service) EnableInstallation(myIdentityKey *ecdsa.PublicKey, installationID string) error {
if s.protocol == nil {
return errProtocolNotInitialized
}
return s.protocol.EnableInstallation(myIdentityKey, installationID)
}
func (s *Service) GetPublicBundle(identityKey *ecdsa.PublicKey) (*chat.Bundle, error) {
if s.protocol == nil {
return nil, errProtocolNotInitialized
}
return s.protocol.GetPublicBundle(identityKey)
}
// DisableInstallation disables an installation for multi-device sync.
func (s *Service) DisableInstallation(myIdentityKey *ecdsa.PublicKey, installationID string) error {
if s.protocol == nil {
return errProtocolNotInitialized
}
return s.protocol.DisableInstallation(myIdentityKey, installationID)
}
// APIs returns a list of new APIs.
func (s *Service) APIs() []rpc.API {
apis := []rpc.API{
{
Namespace: "shhext",
Version: "1.0",
Service: NewPublicAPI(s),
Public: true,
},
}
return apis
}
// Start is run when a service is started.
// It does nothing in this case but is required by `node.Service` interface.
func (s *Service) Start(server *p2p.Server) error {
if s.config.EnableConnectionManager {
connectionsTarget := s.config.ConnectionTarget
if connectionsTarget == 0 {
connectionsTarget = defaultConnectionsTarget
}
maxFailures := s.config.MaxServerFailures
// if not defined change server on first expired event
if maxFailures == 0 {
maxFailures = 1
}
s.connManager = mailservers.NewConnectionManager(server, s.w, connectionsTarget, maxFailures, defaultTimeoutWaitAdded)
s.connManager.Start()
if err := mailservers.EnsureUsedRecordsAddedFirst(s.peerStore, s.connManager); err != nil {
return err
}
}
if s.config.EnableLastUsedMonitor {
s.lastUsedMonitor = mailservers.NewLastUsedConnectionMonitor(s.peerStore, s.cache, s.w)
s.lastUsedMonitor.Start()
}
s.envelopesMonitor.Start()
s.mailMonitor.Start()
s.nodeID = server.PrivateKey
s.server = server
return nil
}
// Stop is run when a service is stopped.
// It does nothing in this case but is required by `node.Service` interface.
func (s *Service) Stop() error {
if s.config.EnableConnectionManager {
s.connManager.Stop()
}
if s.config.EnableLastUsedMonitor {
s.lastUsedMonitor.Stop()
}
s.requestsRegistry.Clear()
s.envelopesMonitor.Stop()
s.mailMonitor.Stop()
return nil
}