improve logs

This reverts commit 42190feb6c.

bridge/l1/relayer.go

@@ -72,15 +72,20 @@ func NewLayer1Relayer(ctx context.Context, ethClient *ethclient.Client, l1Confir
 // ProcessSavedEvents relays saved un-processed cross-domain transactions to desired blockchain
 func (r *Layer1Relayer) ProcessSavedEvents() {
 	// msgs are sorted by nonce in increasing order
-	msgs, err := r.db.GetL1MessagesByStatus(orm.MsgPending)
+	msgs, err := r.db.GetL1MessagesByStatus(orm.MsgPending, 100)
 	if err != nil {
 		log.Error("Failed to fetch unprocessed L1 messages", "err", err)
 		return
 	}
+
+	if len(msgs) > 0 {
+		log.Info("Processing L1 messages", "count", len(msgs))
+	}
+
 	for _, msg := range msgs {
 		if err = r.processSavedEvent(msg); err != nil {
 			if !errors.Is(err, sender.ErrNoAvailableAccount) {
-				log.Error("failed to process event", "err", err)
+				log.Error("failed to process event", "msg.msgHash", msg.MsgHash, "err", err)
 			}
 			return
 		}
@@ -108,7 +113,13 @@ func (r *Layer1Relayer) processSavedEvent(msg *orm.L1Message) error {
 		return err
 	}
 
-	hash, err := r.sender.SendTransaction(msg.MsgHash, &r.cfg.MessengerContractAddress, big.NewInt(0), data)
+	hash, err := r.sender.SendTransaction(msg.MsgHash, &r.cfg.MessengerContractAddress, big.NewInt(0), data, 0)
+	if err != nil && err.Error() == "execution reverted: Message expired" {
+		return r.db.UpdateLayer1Status(r.ctx, msg.MsgHash, orm.MsgExpired)
+	}
+	if err != nil && err.Error() == "execution reverted: Message successfully executed" {
+		return r.db.UpdateLayer1Status(r.ctx, msg.MsgHash, orm.MsgConfirmed)
+	}
 	if err != nil {
 		return err
 	}
@@ -123,6 +134,8 @@ func (r *Layer1Relayer) processSavedEvent(msg *orm.L1Message) error {
 
 // Start the relayer process
 func (r *Layer1Relayer) Start() {
+	log.Info("Starting l1/relayer")
+
 	go func() {
 		// trigger by timer
 		ticker := time.NewTicker(3 * time.Second)

bridge/l1/watcher.go

@@ -81,6 +81,8 @@ func NewWatcher(ctx context.Context, client *ethclient.Client, startHeight uint6
 
 // Start the Watcher module.
 func (w *Watcher) Start() {
+	log.Info("Starting l1/watcher")
+
 	go func() {
 		ticker := time.NewTicker(10 * time.Second)
 		defer ticker.Stop()

bridge/l2/batch_proposer.go

@@ -40,8 +40,7 @@ func newBatchProposer(cfg *config.BatchProposerConfig, orm database.OrmFactory)
 	}
 }
 
-func (w *batchProposer) tryProposeBatch(wg *sync.WaitGroup) {
-	defer wg.Done()
+func (w *batchProposer) tryProposeBatch() {
 	w.mutex.Lock()
 	defer w.mutex.Unlock()
 

bridge/l2/batch_proposer_test.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"math/big"
 	"os"
-	"sync"
 	"testing"
 
 	"github.com/scroll-tech/go-ethereum/core/types"
@@ -50,10 +49,7 @@ func testBatchProposer(t *testing.T) {
 		BatchTimeSec:        1,
 		BatchBlocksLimit:    100,
 	}, db)
-	var wg sync.WaitGroup
-	wg.Add(1)
-	proposer.tryProposeBatch(&wg)
-	wg.Wait()
+	proposer.tryProposeBatch()
 
 	infos, err := db.GetUnbatchedBlocks(map[string]interface{}{},
 		fmt.Sprintf("order by number ASC LIMIT %d", 100))

bridge/l2/relayer.go

@@ -107,7 +107,8 @@ func (r *Layer2Relayer) ProcessSavedEvents(wg *sync.WaitGroup) {
 	// msgs are sorted by nonce in increasing order
 	msgs, err := r.db.GetL2Messages(
 		map[string]interface{}{"status": orm.MsgPending},
-		fmt.Sprintf("AND height<=%d ORDER BY nonce ASC LIMIT %d", batch.EndBlockNumber, processMsgLimit),
+		fmt.Sprintf("AND height<=%d", batch.EndBlockNumber),
+		fmt.Sprintf("ORDER BY nonce ASC LIMIT %d", processMsgLimit),
 	)
 
 	if err != nil {
@@ -165,7 +166,13 @@ func (r *Layer2Relayer) processSavedEvent(msg *orm.L2Message, index uint64) erro
 		return err
 	}
 
-	hash, err := r.messageSender.SendTransaction(msg.MsgHash, &r.cfg.MessengerContractAddress, big.NewInt(0), data)
+	hash, err := r.messageSender.SendTransaction(msg.MsgHash, &r.cfg.MessengerContractAddress, big.NewInt(0), data, 0)
+	if err != nil && err.Error() == "execution reverted: Message expired" {
+		return r.db.UpdateLayer2Status(r.ctx, msg.MsgHash, orm.MsgExpired)
+	}
+	if err != nil && err.Error() == "execution reverted: Message successfully executed" {
+		return r.db.UpdateLayer2Status(r.ctx, msg.MsgHash, orm.MsgConfirmed)
+	}
 	if err != nil {
 		if !errors.Is(err, sender.ErrNoAvailableAccount) {
 			log.Error("Failed to send relayMessageWithProof tx to layer1 ", "msg.height", msg.Height, "msg.MsgHash", msg.MsgHash, "err", err)
@@ -262,7 +269,26 @@ func (r *Layer2Relayer) ProcessPendingBatches(wg *sync.WaitGroup) {
 
 	txID := id + "-commit"
 	// add suffix `-commit` to avoid duplication with finalize tx in unit tests
-	hash, err := r.rollupSender.SendTransaction(txID, &r.cfg.RollupContractAddress, big.NewInt(0), data)
+	hash, err := r.rollupSender.SendTransaction(txID, &r.cfg.RollupContractAddress, big.NewInt(0), data, 0)
+
+	if err != nil && err.Error() == "execution reverted: Parent batch hasn't been committed" {
+
+		// check parent is committing
+		batches, err = r.db.GetBlockBatches(map[string]interface{}{"end_block_hash": batch.ParentHash})
+		if err != nil || len(batches) == 0 {
+			log.Error("Failed to get parent batch from db", "batch_id", id, "parent_hash", batch.ParentHash, "err", err)
+			return
+		}
+		parentBatch := batches[0]
+
+		if parentBatch.RollupStatus >= orm.RollupCommitting {
+			// retry with manual gas estimation
+			gasLimit := estimateCommitBatchGas(len(data), len(layer2Batch.Blocks))
+			hash, err = r.rollupSender.SendTransaction(txID, &r.cfg.RollupContractAddress, big.NewInt(0), data, gasLimit)
+			log.Info("commitBatch tx resent with manual gas estimation ", "id", id, "index", batch.Index, "gasLimit", gasLimit, "hash", hash.String(), "err", err)
+		}
+	}
+
 	if err != nil {
 		if !errors.Is(err, sender.ErrNoAvailableAccount) {
 			log.Error("Failed to send commitBatch tx to layer1 ", "id", id, "index", batch.Index, "err", err)
@@ -284,9 +310,11 @@ func (r *Layer2Relayer) ProcessCommittedBatches(wg *sync.WaitGroup) {
 	defer wg.Done()
 
 	// set skipped batches in a single db operation
-	if err := r.db.UpdateSkippedBatches(); err != nil {
+	if count, err := r.db.UpdateSkippedBatches(); err != nil {
 		log.Error("UpdateSkippedBatches failed", "err", err)
 		// continue anyway
+	} else if count > 0 {
+		log.Info("Skipping batches", "count", count)
 	}
 
 	// batches are sorted by batch index in increasing order
@@ -366,7 +394,7 @@ func (r *Layer2Relayer) ProcessCommittedBatches(wg *sync.WaitGroup) {
 
 		txID := id + "-finalize"
 		// add suffix `-finalize` to avoid duplication with commit tx in unit tests
-		txHash, err := r.rollupSender.SendTransaction(txID, &r.cfg.RollupContractAddress, big.NewInt(0), data)
+		txHash, err := r.rollupSender.SendTransaction(txID, &r.cfg.RollupContractAddress, big.NewInt(0), data, 0)
 		hash := &txHash
 		if err != nil {
 			if !errors.Is(err, sender.ErrNoAvailableAccount) {
@@ -393,6 +421,8 @@ func (r *Layer2Relayer) ProcessCommittedBatches(wg *sync.WaitGroup) {
 
 // Start the relayer process
 func (r *Layer2Relayer) Start() {
+	log.Info("Starting l2/relayer")
+
 	go func() {
 		// trigger by timer
 		ticker := time.NewTicker(time.Second)
@@ -464,3 +494,12 @@ func (r *Layer2Relayer) handleConfirmation(confirmation *sender.Confirmation) {
 	}
 	log.Info("transaction confirmed in layer1", "type", transactionType, "confirmation", confirmation)
 }
+
+func estimateCommitBatchGas(callDataLength int, numBlocks int) uint64 {
+	gasLimit := uint64(0)
+	gasLimit += 16 * uint64(callDataLength)   // calldata cost
+	gasLimit += 4*2100 + 3*22100              // fixed cost per batch
+	gasLimit += 4 * 22100 * uint64(numBlocks) // cost per block in batch
+	gasLimit = gasLimit * 12 / 10             // apply multiplier
+	return gasLimit
+}

bridge/l2/watcher.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"math/big"
 	"reflect"
-	"sync"
 	"time"
 
 	geth "github.com/scroll-tech/go-ethereum"
@@ -77,41 +76,91 @@ func NewL2WatcherClient(ctx context.Context, client *ethclient.Client, confirmat
 
 // Start the Listening process
 func (w *WatcherClient) Start() {
+	log.Info("Starting l2/watcher")
+
 	go func() {
 		if reflect.ValueOf(w.orm).IsNil() {
 			panic("must run L2 watcher with DB")
 		}
 
-		ticker := time.NewTicker(3 * time.Second)
-		defer ticker.Stop()
+		ctx, cancel := context.WithCancel(w.ctx)
 
-		for ; true; <-ticker.C {
-			select {
-			case <-w.stopCh:
-				return
+		// trace fetcher loop
+		go func(ctx context.Context) {
+			ticker := time.NewTicker(3 * time.Second)
+			defer ticker.Stop()
 
-			default:
-				// get current height
-				number, err := w.BlockNumber(w.ctx)
-				if err != nil {
-					log.Error("failed to get_BlockNumber", "err", err)
-					continue
+			for {
+				select {
+				case <-ctx.Done():
+					return
+
+				case <-ticker.C:
+					// get current height
+					number, err := w.BlockNumber(ctx)
+					if err != nil {
+						log.Error("failed to get_BlockNumber", "err", err)
+						continue
+					}
+
+					if number >= w.confirmations {
+						number = number - w.confirmations
+					} else {
+						number = 0
+					}
+
+					w.tryFetchRunningMissingBlocks(ctx, number)
 				}
-
-				if number >= w.confirmations {
-					number = number - w.confirmations
-				} else {
-					number = 0
-				}
-
-				var wg sync.WaitGroup
-				wg.Add(3)
-				go w.tryFetchRunningMissingBlocks(w.ctx, &wg, number)
-				go w.FetchContractEvent(&wg, number)
-				go w.batchProposer.tryProposeBatch(&wg)
-				wg.Wait()
 			}
-		}
+		}(ctx)
+
+		// event fetcher loop
+		go func(ctx context.Context) {
+			ticker := time.NewTicker(3 * time.Second)
+			defer ticker.Stop()
+
+			for {
+				select {
+				case <-ctx.Done():
+					return
+
+				case <-ticker.C:
+					// get current height
+					number, err := w.BlockNumber(ctx)
+					if err != nil {
+						log.Error("failed to get_BlockNumber", "err", err)
+						continue
+					}
+
+					if number >= w.confirmations {
+						number = number - w.confirmations
+					} else {
+						number = 0
+					}
+
+					w.FetchContractEvent(number)
+				}
+			}
+		}(ctx)
+
+		// batch proposer loop
+		go func(ctx context.Context) {
+			ticker := time.NewTicker(3 * time.Second)
+			defer ticker.Stop()
+
+			for {
+				select {
+				case <-ctx.Done():
+					return
+
+				case <-ticker.C:
+					w.batchProposer.tryProposeBatch()
+				}
+			}
+		}(ctx)
+
+		<-w.stopCh
+		cancel()
 	}()
 }
 
@@ -123,8 +172,7 @@ func (w *WatcherClient) Stop() {
 const blockTracesFetchLimit = uint64(10)
 
 // try fetch missing blocks if inconsistent
-func (w *WatcherClient) tryFetchRunningMissingBlocks(ctx context.Context, wg *sync.WaitGroup, blockHeight uint64) {
-	defer wg.Done()
+func (w *WatcherClient) tryFetchRunningMissingBlocks(ctx context.Context, blockHeight uint64) {
 	// Get newest block in DB. must have blocks at that time.
 	// Don't use "block_trace" table "trace" column's BlockTrace.Number,
 	// because it might be empty if the corresponding rollup_result is finalized/finalization_skipped
@@ -181,8 +229,7 @@ func (w *WatcherClient) getAndStoreBlockTraces(ctx context.Context, from, to uin
 const contractEventsBlocksFetchLimit = int64(10)
 
 // FetchContractEvent pull latest event logs from given contract address and save in DB
-func (w *WatcherClient) FetchContractEvent(wg *sync.WaitGroup, blockHeight uint64) {
-	defer wg.Done()
+func (w *WatcherClient) FetchContractEvent(blockHeight uint64) {
 	defer func() {
 		log.Info("l2 watcher fetchContractEvent", "w.processedMsgHeight", w.processedMsgHeight)
 	}()

bridge/l2/watcher_test.go

@@ -44,7 +44,7 @@ func testCreateNewWatcherAndStop(t *testing.T) {
 	numTransactions := 3
 	toAddress := common.HexToAddress("0x4592d8f8d7b001e72cb26a73e4fa1806a51ac79d")
 	for i := 0; i < numTransactions; i++ {
-		_, err = newSender.SendTransaction(strconv.Itoa(1000+i), &toAddress, big.NewInt(1000000000), nil)
+		_, err = newSender.SendTransaction(strconv.Itoa(1000+i), &toAddress, big.NewInt(1000000000), nil, 0)
 		assert.NoError(t, err)
 		<-newSender.ConfirmChan()
 	}

bridge/sender/sender.go

@@ -154,18 +154,21 @@ func (s *Sender) NumberOfAccounts() int {
 	return len(s.auths.accounts)
 }
 
-func (s *Sender) getFeeData(auth *bind.TransactOpts, target *common.Address, value *big.Int, data []byte) (*FeeData, error) {
-	// estimate gas limit
-	gasLimit, err := s.client.EstimateGas(s.ctx, geth.CallMsg{From: auth.From, To: target, Value: value, Data: data})
-	if err != nil {
-		return nil, err
+func (s *Sender) getFeeData(auth *bind.TransactOpts, target *common.Address, value *big.Int, data []byte, gasLimit uint64) (*FeeData, error) {
+	if gasLimit == 0 {
+		// estimate gas limit
+		var err error
+		gasLimit, err = s.client.EstimateGas(s.ctx, geth.CallMsg{From: auth.From, To: target, Value: value, Data: data})
+		if err != nil {
+			return nil, err
+		}
+		gasLimit = gasLimit * 15 / 10 // 50% extra gas to void out of gas error
 	}
-	gasLimit = gasLimit * 15 / 10 // 50% extra gas to void out of gas error
+
 	// @todo change it when Scroll enable EIP1559
 	if s.config.TxType != DynamicFeeTxType {
 		// estimate gas price
-		var gasPrice *big.Int
-		gasPrice, err = s.client.SuggestGasPrice(s.ctx)
+		gasPrice, err := s.client.SuggestGasPrice(s.ctx)
 		if err != nil {
 			return nil, err
 		}
@@ -189,7 +192,7 @@ func (s *Sender) getFeeData(auth *bind.TransactOpts, target *common.Address, val
 }
 
 // SendTransaction send a signed L2tL1 transaction.
-func (s *Sender) SendTransaction(ID string, target *common.Address, value *big.Int, data []byte) (hash common.Hash, err error) {
+func (s *Sender) SendTransaction(ID string, target *common.Address, value *big.Int, data []byte, gasLimit uint64) (hash common.Hash, err error) {
 	// We occupy the ID, in case some other threads call with the same ID in the same time
 	if _, loaded := s.pendingTxs.LoadOrStore(ID, nil); loaded {
 		return common.Hash{}, fmt.Errorf("has the repeat tx ID, ID: %s", ID)
@@ -213,9 +216,10 @@ func (s *Sender) SendTransaction(ID string, target *common.Address, value *big.I
 		tx      *types.Transaction
 	)
 	// estimate gas fee
-	if feeData, err = s.getFeeData(auth, target, value, data); err != nil {
+	if feeData, err = s.getFeeData(auth, target, value, data, gasLimit); err != nil {
 		return
 	}
+
 	if tx, err = s.createAndSendTx(auth, feeData, target, value, data, nil); err == nil {
 		// add pending transaction to queue
 		pending := &PendingTransaction{

bridge/sender/sender_test.go

@@ -87,7 +87,7 @@ func testBatchSender(t *testing.T, batchSize int) {
 			for i := 0; i < TXBatch; i++ {
 				toAddr := common.HexToAddress("0x4592d8f8d7b001e72cb26a73e4fa1806a51ac79d")
 				id := strconv.Itoa(i + index*1000)
-				_, err := newSender.SendTransaction(id, &toAddr, big.NewInt(1), nil)
+				_, err := newSender.SendTransaction(id, &toAddr, big.NewInt(1), nil, 0)
 				if errors.Is(err, sender.ErrNoAvailableAccount) {
 					<-time.After(time.Second)
 					continue

bridge/tests/l2_message_relay_test.go

@@ -26,7 +26,7 @@ func testRelayL2MessageSucceed(t *testing.T) {
 	defer db.Close()
 
 	var wg sync.WaitGroup
-	wg.Add(4)
+	wg.Add(3)
 
 	prepareContracts(t)
 
@@ -55,7 +55,7 @@ func testRelayL2MessageSucceed(t *testing.T) {
 	}
 
 	// l2 watch process events
-	l2Watcher.FetchContractEvent(&wg, sendReceipt.BlockNumber.Uint64())
+	l2Watcher.FetchContractEvent(sendReceipt.BlockNumber.Uint64())
 
 	// check db status
 	msg, err := db.GetL2MessageByNonce(nonce.Uint64())

common/version/version.go

@@ -5,7 +5,7 @@ import (
 	"runtime/debug"
 )
 
-var tag = "prealpha-v11.6"
+var tag = "prealpha-v11.14"
 
 var commit = func() string {
 	if info, ok := debug.ReadBuildInfo(); ok {

coordinator/manager.go

@@ -330,6 +330,10 @@ func (m *Manager) CollectProofs(sess *session) {
 		case <-time.After(time.Duration(m.cfg.CollectionTime) * time.Minute):
 			m.mu.Lock()
 			defer func() {
+				// TODO: remove the clean-up, rollers report healthy status.
+				for pk := range sess.info.Rollers {
+					m.freeTaskIDForRoller(pk, sess.info.ID)
+				}
 				delete(m.sessions, sess.info.ID)
 				m.mu.Unlock()
 			}()

database/migrate/migrations/00002_l1_message.sql

@@ -20,7 +20,7 @@ create table l1_message
 );
 
 comment
-on column l1_message.status is 'undefined, pending, submitted, confirmed';
+on column l1_message.status is 'undefined, pending, submitted, confirmed, failed, expired';
 
 create unique index l1_message_hash_uindex
 on l1_message (msg_hash);

database/migrate/migrations/00003_l2_message.sql

@@ -21,7 +21,7 @@ create table l2_message
 );
 
 comment
-on column l2_message.status is 'undefined, pending, submitted, confirmed';
+on column l2_message.status is 'undefined, pending, submitted, confirmed, failed, expired';
 
 create unique index l2_message_hash_uindex
 on l2_message (msg_hash);

database/orm/block_batch.go

@@ -260,7 +260,7 @@ func (o *blockBatchOrm) GetPendingBatches(limit uint64) ([]string, error) {
 }
 
 func (o *blockBatchOrm) GetLatestFinalizedBatch() (*BlockBatch, error) {
-	row := o.db.QueryRowx(`SELECT * FROM block_batch WHERE rollup_status = $1 OR rollup_status = $2 ORDER BY index DESC;`, RollupFinalized, RollupFinalizationSkipped)
+	row := o.db.QueryRowx(`select * from block_batch where index = (select max(index) from block_batch where rollup_status = $1);`, RollupFinalized)
 	batch := &BlockBatch{}
 	if err := row.StructScan(batch); err != nil {
 		return nil, err
@@ -407,7 +407,16 @@ func (o *blockBatchOrm) GetAssignedBatchIDs() ([]string, error) {
 	return ids, rows.Close()
 }
 
-func (o *blockBatchOrm) UpdateSkippedBatches() error {
-	_, err := o.db.Exec(o.db.Rebind("update block_batch set rollup_status = ? where (proving_status = ? or proving_status = ?) and rollup_status = ?;"), RollupFinalizationSkipped, ProvingTaskSkipped, ProvingTaskFailed, RollupCommitted)
-	return err
+func (o *blockBatchOrm) UpdateSkippedBatches() (int64, error) {
+	res, err := o.db.Exec(o.db.Rebind("update block_batch set rollup_status = ? where (proving_status = ? or proving_status = ?) and rollup_status = ?;"), RollupFinalizationSkipped, ProvingTaskSkipped, ProvingTaskFailed, RollupCommitted)
+	if err != nil {
+		return 0, err
+	}
+
+	count, err := res.RowsAffected()
+	if err != nil {
+		return 0, err
+	}
+
+	return count, nil
 }

database/orm/interface.go

@@ -28,6 +28,9 @@ const (
 
 	// MsgFailed represents the from_layer message status is failed
 	MsgFailed
+
+	// MsgExpired represents the from_layer message status is expired
+	MsgExpired
 )
 
 // L1Message is structure of stored layer1 bridge message
@@ -151,7 +154,7 @@ type BlockBatchOrm interface {
 	UpdateCommitTxHashAndRollupStatus(ctx context.Context, id string, commitTxHash string, status RollupStatus) error
 	UpdateFinalizeTxHashAndRollupStatus(ctx context.Context, id string, finalizeTxHash string, status RollupStatus) error
 	GetAssignedBatchIDs() ([]string, error)
-	UpdateSkippedBatches() error
+	UpdateSkippedBatches() (int64, error)
 
 	GetCommitTxHash(id string) (sql.NullString, error)   // for unit tests only
 	GetFinalizeTxHash(id string) (sql.NullString, error) // for unit tests only
@@ -161,7 +164,7 @@ type BlockBatchOrm interface {
 type L1MessageOrm interface {
 	GetL1MessageByNonce(nonce uint64) (*L1Message, error)
 	GetL1MessageByMsgHash(msgHash string) (*L1Message, error)
-	GetL1MessagesByStatus(status MsgStatus) ([]*L1Message, error)
+	GetL1MessagesByStatus(status MsgStatus, limit uint64) ([]*L1Message, error)
 	GetL1ProcessedNonce() (int64, error)
 	SaveL1Messages(ctx context.Context, messages []*L1Message) error
 	UpdateLayer2Hash(ctx context.Context, msgHash string, layer2Hash string) error

database/orm/l1_message.go

@@ -45,8 +45,8 @@ func (m *l1MessageOrm) GetL1MessageByNonce(nonce uint64) (*L1Message, error) {
 }
 
 // GetL1MessagesByStatus fetch list of unprocessed messages given msg status
-func (m *l1MessageOrm) GetL1MessagesByStatus(status MsgStatus) ([]*L1Message, error) {
-	rows, err := m.db.Queryx(`SELECT nonce, msg_hash, height, sender, target, value, fee, gas_limit, deadline, calldata, layer1_hash, status FROM l1_message WHERE status = $1 ORDER BY nonce ASC;`, status)
+func (m *l1MessageOrm) GetL1MessagesByStatus(status MsgStatus, limit uint64) ([]*L1Message, error) {
+	rows, err := m.db.Queryx(`SELECT nonce, msg_hash, height, sender, target, value, fee, gas_limit, deadline, calldata, layer1_hash, status FROM l1_message WHERE status = $1 ORDER BY nonce ASC LIMIT $2;`, status, limit)
 	if err != nil {
 		return nil, err
 	}