package transfer import ( "context" "math/big" "sync" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/event" "github.com/ethereum/go-ethereum/log" "github.com/status-im/status-go/rpc/chain" "github.com/status-im/status-go/services/wallet/async" "github.com/status-im/status-go/services/wallet/balance" "github.com/status-im/status-go/services/wallet/token" "github.com/status-im/status-go/services/wallet/walletevent" "github.com/status-im/status-go/transactions" ) func NewSequentialFetchStrategy(db *Database, blockDAO *BlockDAO, feed *event.Feed, transactionManager *TransactionManager, pendingTxManager *transactions.PendingTxTracker, tokenManager *token.Manager, chainClients map[uint64]*chain.ClientWithFallback, accounts []common.Address, balanceCacher balance.Cacher, ) *SequentialFetchStrategy { return &SequentialFetchStrategy{ db: db, blockDAO: blockDAO, feed: feed, transactionManager: transactionManager, pendingTxManager: pendingTxManager, tokenManager: tokenManager, chainClients: chainClients, accounts: accounts, balanceCacher: balanceCacher, } } type SequentialFetchStrategy struct { db *Database blockDAO *BlockDAO feed *event.Feed mu sync.Mutex group *async.Group transactionManager *TransactionManager pendingTxManager *transactions.PendingTxTracker tokenManager *token.Manager chainClients map[uint64]*chain.ClientWithFallback accounts []common.Address balanceCacher balance.Cacher } func (s *SequentialFetchStrategy) newCommand(chainClient *chain.ClientWithFallback, account common.Address) async.Commander { return newLoadBlocksAndTransfersCommand(account, s.db, s.blockDAO, chainClient, s.feed, s.transactionManager, s.pendingTxManager, s.tokenManager, s.balanceCacher) } func (s *SequentialFetchStrategy) start() error { s.mu.Lock() defer s.mu.Unlock() if s.group != nil { return errAlreadyRunning } s.group = async.NewGroup(context.Background()) if s.feed != nil { s.feed.Send(walletevent.Event{ Type: EventFetchingRecentHistory, Accounts: s.accounts, }) } for _, chainClient := range s.chainClients { for _, address := range s.accounts { ctl := s.newCommand(chainClient, address) s.group.Add(ctl.Command()) } } return nil } // Stop stops reactor loop and waits till it exits. func (s *SequentialFetchStrategy) stop() { s.mu.Lock() defer s.mu.Unlock() if s.group == nil { return } s.group.Stop() s.group.Wait() s.group = nil } func (s *SequentialFetchStrategy) kind() FetchStrategyType { return SequentialFetchStrategyType } // TODO: remove fetchMore parameter from here and interface, it is used by OnDemandFetchStrategy only func (s *SequentialFetchStrategy) getTransfersByAddress(ctx context.Context, chainID uint64, address common.Address, toBlock *big.Int, limit int64, fetchMore bool) ([]Transfer, error) { log.Info("[WalletAPI:: GetTransfersByAddress] get transfers for an address", "address", address, "fetchMore", fetchMore, "chainID", chainID, "toBlock", toBlock, "limit", limit) rst, err := s.db.GetTransfersByAddress(chainID, address, toBlock, limit) if err != nil { log.Error("[WalletAPI:: GetTransfersByAddress] can't fetch transfers", "err", err) return nil, err } return rst, nil }