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service.go
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service.go
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package ext
import (
"context"
"crypto/ecdsa"
"database/sql"
"math/big"
"os"
"path/filepath"
"time"
"github.com/status-im/status-go/services/wallet"
"github.com/syndtr/goleveldb/leveldb"
"github.com/status-im/status-go/logutils"
commongethtypes "github.com/ethereum/go-ethereum/common"
gethtypes "github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethclient"
"github.com/ethereum/go-ethereum/log"
"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/multiaccounts/accounts"
"github.com/status-im/status-go/params"
"github.com/status-im/status-go/services/ext/mailservers"
"github.com/status-im/status-go/signal"
"go.uber.org/zap"
coretypes "github.com/status-im/status-go/eth-node/core/types"
"github.com/status-im/status-go/eth-node/types"
"github.com/status-im/status-go/protocol"
"github.com/status-im/status-go/protocol/transport"
)
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
)
// EnvelopeEventsHandler used for two different event types.
type EnvelopeEventsHandler interface {
EnvelopeSent([][]byte)
EnvelopeExpired([][]byte, error)
MailServerRequestCompleted(types.Hash, types.Hash, []byte, error)
MailServerRequestExpired(types.Hash)
}
// Service is a service that provides some additional API to whisper-based protocols like Whisper or Waku.
type Service struct {
messenger *protocol.Messenger
identity *ecdsa.PrivateKey
cancelMessenger chan struct{}
storage db.TransactionalStorage
n types.Node
config params.ShhextConfig
mailMonitor *MailRequestMonitor
requestsRegistry *RequestsRegistry
server *p2p.Server
eventSub mailservers.EnvelopeEventSubscriber
peerStore *mailservers.PeerStore
cache *mailservers.Cache
connManager *mailservers.ConnectionManager
lastUsedMonitor *mailservers.LastUsedConnectionMonitor
accountsDB *accounts.Database
}
// Make sure that Service implements node.Service interface.
var _ node.Service = (*Service)(nil)
func New(
config params.ShhextConfig,
n types.Node,
ldb *leveldb.DB,
mailMonitor *MailRequestMonitor,
reqRegistry *RequestsRegistry,
eventSub mailservers.EnvelopeEventSubscriber,
) *Service {
cache := mailservers.NewCache(ldb)
peerStore := mailservers.NewPeerStore(cache)
return &Service{
storage: db.NewLevelDBStorage(ldb),
n: n,
config: config,
mailMonitor: mailMonitor,
requestsRegistry: reqRegistry,
peerStore: peerStore,
cache: mailservers.NewCache(ldb),
eventSub: eventSub,
}
}
func (s *Service) NodeID() *ecdsa.PrivateKey {
if s.server == nil {
return nil
}
return s.server.PrivateKey
}
func (s *Service) RequestsRegistry() *RequestsRegistry {
return s.requestsRegistry
}
func (s *Service) GetPeer(rawURL string) (*enode.Node, error) {
if len(rawURL) == 0 {
return mailservers.GetFirstConnected(s.server, s.peerStore)
}
return enode.ParseV4(rawURL)
}
func (s *Service) InitProtocol(identity *ecdsa.PrivateKey, db *sql.DB) error { // nolint: gocyclo
if !s.config.PFSEnabled {
return nil
}
// If Messenger has been already set up, we need to shut it down
// before we init it again. Otherwise, it will lead to goroutines leakage
// due to not stopped filters.
if s.messenger != nil {
if err := s.messenger.Shutdown(); err != nil {
return err
}
}
s.identity = identity
dataDir := filepath.Clean(s.config.BackupDisabledDataDir)
if err := os.MkdirAll(dataDir, os.ModePerm); err != nil {
return err
}
// Create a custom zap.Logger which will forward logs from status-go/protocol to status-go logger.
zapLogger, err := logutils.NewZapLoggerWithAdapter(logutils.Logger())
if err != nil {
return err
}
envelopesMonitorConfig := &transport.EnvelopesMonitorConfig{
MaxAttempts: s.config.MaxMessageDeliveryAttempts,
MailserverConfirmationsEnabled: s.config.MailServerConfirmations,
IsMailserver: func(peer types.EnodeID) bool {
return s.peerStore.Exist(peer)
},
EnvelopeEventsHandler: EnvelopeSignalHandler{},
Logger: zapLogger,
}
options := buildMessengerOptions(s.config, db, envelopesMonitorConfig, zapLogger)
messenger, err := protocol.NewMessenger(
identity,
s.n,
s.config.InstallationID,
options...,
)
if err != nil {
return err
}
s.accountsDB = accounts.NewDB(db)
s.messenger = messenger
return messenger.Init()
}
func (s *Service) StartMessenger() error {
// Start a loop that retrieves all messages and propagates them to status-react.
s.cancelMessenger = make(chan struct{})
go s.retrieveMessagesLoop(time.Second, s.cancelMessenger)
go s.verifyTransactionLoop(30*time.Second, s.cancelMessenger)
go s.verifyENSLoop(30*time.Second, s.cancelMessenger)
return s.messenger.Start()
}
func (s *Service) retrieveMessagesLoop(tick time.Duration, cancel <-chan struct{}) {
ticker := time.NewTicker(tick)
defer ticker.Stop()
for {
select {
case <-ticker.C:
response, err := s.messenger.RetrieveAll()
if err != nil {
log.Error("failed to retrieve raw messages", "err", err)
continue
}
if !response.IsEmpty() {
PublisherSignalHandler{}.NewMessages(response)
}
case <-cancel:
return
}
}
}
type verifyTransactionClient struct {
chainID *big.Int
url string
}
func (c *verifyTransactionClient) TransactionByHash(ctx context.Context, hash types.Hash) (coretypes.Message, coretypes.TransactionStatus, error) {
signer := gethtypes.NewEIP155Signer(c.chainID)
client, err := ethclient.Dial(c.url)
if err != nil {
return coretypes.Message{}, coretypes.TransactionStatusPending, err
}
transaction, pending, err := client.TransactionByHash(ctx, commongethtypes.BytesToHash(hash.Bytes()))
if err != nil {
return coretypes.Message{}, coretypes.TransactionStatusPending, err
}
message, err := transaction.AsMessage(signer)
if err != nil {
return coretypes.Message{}, coretypes.TransactionStatusPending, err
}
from := types.BytesToAddress(message.From().Bytes())
to := types.BytesToAddress(message.To().Bytes())
if pending {
return coretypes.NewMessage(
from,
&to,
message.Nonce(),
message.Value(),
message.Gas(),
message.GasPrice(),
message.Data(),
message.CheckNonce(),
), coretypes.TransactionStatusPending, nil
}
receipt, err := client.TransactionReceipt(ctx, commongethtypes.BytesToHash(hash.Bytes()))
if err != nil {
return coretypes.Message{}, coretypes.TransactionStatusPending, err
}
coremessage := coretypes.NewMessage(
from,
&to,
message.Nonce(),
message.Value(),
message.Gas(),
message.GasPrice(),
message.Data(),
message.CheckNonce(),
)
// Token transfer, check the logs
if len(coremessage.Data()) != 0 {
if wallet.IsTokenTransfer(receipt.Logs) {
return coremessage, coretypes.TransactionStatus(receipt.Status), nil
}
return coremessage, coretypes.TransactionStatusFailed, nil
}
return coremessage, coretypes.TransactionStatus(receipt.Status), nil
}
func (s *Service) verifyENSLoop(tick time.Duration, cancel <-chan struct{}) {
if s.config.VerifyENSURL == "" || s.config.VerifyENSContractAddress == "" {
log.Warn("not starting ENS loop")
return
}
ticker := time.NewTicker(tick)
defer ticker.Stop()
ctx, cancelVerifyENS := context.WithCancel(context.Background())
for {
select {
case <-ticker.C:
response, err := s.messenger.VerifyENSNames(ctx, s.config.VerifyENSURL, s.config.VerifyENSContractAddress)
if err != nil {
log.Error("failed to validate ens", "err", err)
continue
}
if !response.IsEmpty() {
PublisherSignalHandler{}.NewMessages(response)
}
case <-cancel:
cancelVerifyENS()
return
}
}
}
func (s *Service) verifyTransactionLoop(tick time.Duration, cancel <-chan struct{}) {
if s.config.VerifyTransactionURL == "" {
log.Warn("not starting transaction loop")
return
}
ticker := time.NewTicker(tick)
defer ticker.Stop()
ctx, cancelVerifyTransaction := context.WithCancel(context.Background())
for {
select {
case <-ticker.C:
accounts, err := s.accountsDB.GetAccounts()
if err != nil {
log.Error("failed to retrieve accounts", "err", err)
}
var wallets []types.Address
for _, account := range accounts {
if account.Wallet {
wallets = append(wallets, types.BytesToAddress(account.Address.Bytes()))
}
}
response, err := s.messenger.ValidateTransactions(ctx, wallets)
if err != nil {
log.Error("failed to validate transactions", "err", err)
continue
}
if !response.IsEmpty() {
PublisherSignalHandler{}.NewMessages(response)
}
case <-cancel:
cancelVerifyTransaction()
return
}
}
}
func (s *Service) ConfirmMessagesProcessed(messageIDs [][]byte) error {
return s.messenger.ConfirmMessagesProcessed(messageIDs)
}
func (s *Service) EnableInstallation(installationID string) error {
return s.messenger.EnableInstallation(installationID)
}
// DisableInstallation disables an installation for multi-device sync.
func (s *Service) DisableInstallation(installationID string) error {
return s.messenger.DisableInstallation(installationID)
}
// 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{}
}
// APIs returns a list of new APIs.
func (s *Service) APIs() []rpc.API {
panic("this is abstract service, use shhext or wakuext implementation")
}
// 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.eventSub, 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.eventSub)
s.lastUsedMonitor.Start()
}
s.mailMonitor.Start()
s.server = server
return nil
}
// Stop is run when a service is stopped.
func (s *Service) Stop() error {
log.Info("Stopping shhext service")
if s.config.EnableConnectionManager {
s.connManager.Stop()
}
if s.config.EnableLastUsedMonitor {
s.lastUsedMonitor.Stop()
}
s.requestsRegistry.Clear()
s.mailMonitor.Stop()
if s.cancelMessenger != nil {
select {
case <-s.cancelMessenger:
// channel already closed
default:
close(s.cancelMessenger)
s.cancelMessenger = nil
}
}
if s.messenger != nil {
if err := s.messenger.Shutdown(); err != nil {
return err
}
}
return nil
}
func onNegotiatedFilters(filters []*transport.Filter) {
var signalFilters []*signal.Filter
for _, filter := range filters {
signalFilter := &signal.Filter{
ChatID: filter.ChatID,
SymKeyID: filter.SymKeyID,
Listen: filter.Listen,
FilterID: filter.FilterID,
Identity: filter.Identity,
Topic: filter.Topic,
}
signalFilters = append(signalFilters, signalFilter)
}
if len(filters) != 0 {
handler := PublisherSignalHandler{}
handler.FilterAdded(signalFilters)
}
}
func buildMessengerOptions(
config params.ShhextConfig,
db *sql.DB,
envelopesMonitorConfig *transport.EnvelopesMonitorConfig,
logger *zap.Logger,
) []protocol.Option {
options := []protocol.Option{
protocol.WithCustomLogger(logger),
protocol.WithDatabase(db),
protocol.WithEnvelopesMonitorConfig(envelopesMonitorConfig),
protocol.WithOnNegotiatedFilters(onNegotiatedFilters),
}
if config.DataSyncEnabled {
options = append(options, protocol.WithDatasync())
}
if config.VerifyTransactionURL != "" {
client := &verifyTransactionClient{
url: config.VerifyTransactionURL,
chainID: big.NewInt(config.VerifyTransactionChainID),
}
options = append(options, protocol.WithVerifyTransactionClient(client))
}
return options
}