diff --git a/.gitignore b/.gitignore
index 5693bb269..cefcfac8c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -46,4 +46,5 @@ cmd/btfs/fs-repo-migrations.bk
 cmd/btfs/update-darwin-amd64
 
 cmd/.DS_Store
-cmd/btfs/s
\ No newline at end of file
+cmd/btfs/s
+cmd/btfs/btfs
\ No newline at end of file
diff --git a/core/commands/storage/upload/upload/do_pay.go b/core/commands/storage/upload/upload/do_pay.go
index 2973d76cb..9cc943ccc 100644
--- a/core/commands/storage/upload/upload/do_pay.go
+++ b/core/commands/storage/upload/upload/do_pay.go
@@ -20,13 +20,10 @@ func payInCheque(rss *sessions.RenterSession) error {
 			return err
 		}
 
-		//this is old price's rate [Compatible with older versions]
-		rateObj, err := chain.SettleObject.OracleService.CurrentRate()
+		realAmount, err := getRealAmount(c.SignedGuardContract.Amount)
 		if err != nil {
 			return err
 		}
-		amount := c.SignedGuardContract.Amount
-		realAmount := big.NewInt(0).Mul(big.NewInt(amount), rateObj)
 
 		host := c.SignedGuardContract.HostPid
 		contractId := c.SignedGuardContract.ContractId
@@ -41,3 +38,14 @@ func payInCheque(rss *sessions.RenterSession) error {
 
 	return nil
 }
+
+func getRealAmount(amount int64) (*big.Int, error) {
+	//this is old price's rate [Compatible with older versions]
+	rateObj, err := chain.SettleObject.OracleService.CurrentRate()
+	if err != nil {
+		return nil, err
+	}
+
+	realAmount := big.NewInt(0).Mul(big.NewInt(amount), rateObj)
+	return realAmount, nil
+}
diff --git a/core/commands/storage/upload/upload/do_submit.go b/core/commands/storage/upload/upload/do_submit.go
index 26f55cb31..e073d0b74 100644
--- a/core/commands/storage/upload/upload/do_submit.go
+++ b/core/commands/storage/upload/upload/do_submit.go
@@ -1,8 +1,8 @@
 package upload
 
 import (
-	"math/big"
-
+	"context"
+	"fmt"
 	"github.com/bittorrent/go-btfs/settlement/swap/vault"
 
 	"github.com/bittorrent/go-btfs/chain"
@@ -43,12 +43,28 @@ func doSubmit(rss *sessions.RenterSession) error {
 		return err
 	}
 
-	AvailableBalance, err := chain.SettleObject.VaultService.AvailableBalance(rss.Ctx)
+	err = checkAvailableBalance(rss.Ctx, amount)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func checkAvailableBalance(ctx context.Context, amount int64) error {
+	realAmount, err := getRealAmount(amount)
+	if err != nil {
+		return err
+	}
+
+	AvailableBalance, err := chain.SettleObject.VaultService.AvailableBalance(ctx)
 	if err != nil {
 		return err
 	}
 
-	if AvailableBalance.Cmp(big.NewInt(amount)) < 0 {
+	fmt.Printf("check,  balance=%v, realAmount=%v \n", AvailableBalance, realAmount)
+	if AvailableBalance.Cmp(realAmount) < 0 {
+		fmt.Println("check, err: ", vault.ErrInsufficientFunds)
 		return vault.ErrInsufficientFunds
 	}
 	return nil
diff --git a/core/commands/storage/upload/upload/recieve_cheque.go b/core/commands/storage/upload/upload/recieve_cheque.go
index 1713fe556..aa12c3876 100644
--- a/core/commands/storage/upload/upload/recieve_cheque.go
+++ b/core/commands/storage/upload/upload/recieve_cheque.go
@@ -44,26 +44,23 @@ var StorageUploadChequeCmd = &cmds.Command{
 
 		encodedCheque := req.Arguments[0]
 		contractId := req.Arguments[2]
-
 		fmt.Printf("receive cheque, requestPid:%s contractId:%+v \n", requestPid.String(), contractId)
 
-		go func() {
-			// decode and deal the cheque
-			err = swapprotocol.SwapProtocol.Handler(context.Background(), requestPid.String(), encodedCheque, price)
-			if err != nil {
-				fmt.Println("swapprotocol.SwapProtocol.Handler, error:", err)
-				return
-			}
+		// decode and deal the cheque
+		err = swapprotocol.SwapProtocol.Handler(context.Background(), requestPid.String(), encodedCheque, price)
+		if err != nil {
+			fmt.Println("receive cheque, swapprotocol.SwapProtocol.Handler, error:", err)
+			return err
+		}
 
-			// if receive cheque of contractId, set shard paid status.
-			if len(contractId) > 0 {
-				err := setPaidStatus(ctxParams, contractId)
-				if err != nil {
-					fmt.Println("setPaidStatus: contractId error:", contractId, err)
-					return
-				}
+		// if receive cheque of contractId, set shard paid status.
+		if len(contractId) > 0 {
+			err := setPaidStatus(ctxParams, contractId)
+			if err != nil {
+				fmt.Println("receive cheque, setPaidStatus: contractId error:", contractId, err)
+				return err
 			}
-		}()
+		}
 
 		return nil
 	},
diff --git a/core/commands/storage/upload/upload/upload_shard.go b/core/commands/storage/upload/upload/upload_shard.go
index 343fa4c76..059ea56c8 100644
--- a/core/commands/storage/upload/upload/upload_shard.go
+++ b/core/commands/storage/upload/upload/upload_shard.go
@@ -15,7 +15,14 @@ import (
 
 func UploadShard(rss *sessions.RenterSession, hp helper.IHostsProvider, price int64, shardSize int64,
 	storageLength int,
-	offlineSigning bool, renterId peer.ID, fileSize int64, shardIndexes []int, rp *RepairParams) {
+	offlineSigning bool, renterId peer.ID, fileSize int64, shardIndexes []int, rp *RepairParams) error {
+
+	expectTotalPay := helper.TotalPay(shardSize, price, storageLength) * int64(len(rss.ShardHashes))
+	err := checkAvailableBalance(rss.Ctx, expectTotalPay)
+	if err != nil {
+		return err
+	}
+
 	for index, shardHash := range rss.ShardHashes {
 		go func(i int, h string) {
 			err := backoff.Retry(func() error {
@@ -144,4 +151,6 @@ func UploadShard(rss *sessions.RenterSession, hp helper.IHostsProvider, price in
 			}
 		}
 	}(rss, len(rss.ShardHashes))
+
+	return nil
 }
diff --git a/settlement/swap/swapprotocol/swapprotocol.go b/settlement/swap/swapprotocol/swapprotocol.go
index 6e8ea5889..0f5658bb1 100644
--- a/settlement/swap/swapprotocol/swapprotocol.go
+++ b/settlement/swap/swapprotocol/swapprotocol.go
@@ -99,7 +99,7 @@ func (s *Service) Handler(ctx context.Context, requestPid string, encodedCheque
 
 // InitiateCheque attempts to send a cheque to a peer.
 func (s *Service) EmitCheque(ctx context.Context, peer string, amount *big.Int, contractId string, issue IssueFunc) (balance *big.Int, err error) {
-	ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
+	ctx, cancel := context.WithTimeout(ctx, 60*time.Second)
 	defer cancel()
 
 	sentAmount := amount
@@ -123,7 +123,7 @@ func (s *Service) EmitCheque(ctx context.Context, peer string, amount *big.Int,
 				log.Warnf("get handshakeInfo from peer %v (%v) error", peerhostPid)
 				return ErrGetBeneficiary
 			}
-			ctx, _ := context.WithTimeout(context.Background(), 20*time.Second)
+			ctx, _ := context.WithTimeout(context.Background(), 60*time.Second)
 			ctxParams, err := helper.ExtractContextParams(Req, Env)
 			if err != nil {
 				return err
@@ -199,7 +199,7 @@ func (s *Service) EmitCheque(ctx context.Context, peer string, amount *big.Int,
 			wg.Add(1)
 			go func() {
 				err = func() error {
-					ctx, _ := context.WithTimeout(context.Background(), 20*time.Second)
+					ctx, _ := context.WithTimeout(context.Background(), 60*time.Second)
 					ctxParams, err := helper.ExtractContextParams(Req, Env)
 					if err != nil {
 						return err
diff --git a/settlement/swap/vault/vault.go b/settlement/swap/vault/vault.go
index 09562d9ee..d3c1d198c 100644
--- a/settlement/swap/vault/vault.go
+++ b/settlement/swap/vault/vault.go
@@ -201,9 +201,6 @@ func lastIssuedChequeKey(beneficiary common.Address) string {
 }
 
 func (s *service) reserveTotalIssued(ctx context.Context, amount *big.Int) (*big.Int, error) {
-	s.lock.Lock()
-	defer s.lock.Unlock()
-
 	availableBalance, err := s.AvailableBalance(ctx)
 	if err != nil {
 		return nil, err
@@ -218,8 +215,6 @@ func (s *service) reserveTotalIssued(ctx context.Context, amount *big.Int) (*big
 }
 
 func (s *service) unreserveTotalIssued(amount *big.Int) {
-	s.lock.Lock()
-	defer s.lock.Unlock()
 	s.totalIssuedReserved = s.totalIssuedReserved.Sub(s.totalIssuedReserved, amount)
 }
 
@@ -228,6 +223,9 @@ func (s *service) unreserveTotalIssued(amount *big.Int) {
 // The available balance which is available after sending the cheque is passed
 // to the caller for it to be communicated over metrics.
 func (s *service) Issue(ctx context.Context, beneficiary common.Address, amount *big.Int, sendChequeFunc SendChequeFunc) (*big.Int, error) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
 	availableBalance, err := s.reserveTotalIssued(ctx, amount)
 	if err != nil {
 		return nil, err
@@ -278,9 +276,6 @@ func (s *service) Issue(ctx context.Context, beneficiary common.Address, amount
 		return nil, err
 	}
 
-	s.lock.Lock()
-	defer s.lock.Unlock()
-
 	// store the history issued cheque
 	err = s.chequeStore.StoreSendChequeRecord(s.address, beneficiary, amount)
 	if err != nil {