diff --git a/chains/bridge/bridge.go b/chains/bridge/bridge.go
index 44e16d6..d6f58ea 100644
--- a/chains/bridge/bridge.go
+++ b/chains/bridge/bridge.go
@@ -26,7 +26,8 @@ import (
 )
 
 type Client struct {
-	address string
+	address  string
+	explorer string
 }
 
 func New(url string) *Client {
@@ -35,6 +36,10 @@ func New(url string) *Client {
 	}
 }
 
+func (c *Client) SetExplorer(url string) {
+	c.explorer = url
+}
+
 func (c *Client) Address() string {
 	return c.address
 }
diff --git a/chains/bridge/fee.go b/chains/bridge/fee.go
index 6467c28..6198069 100644
--- a/chains/bridge/fee.go
+++ b/chains/bridge/fee.go
@@ -52,3 +52,30 @@ func (r *CheckFeeRequest) Missing() bool {
 func (c *Client) CheckFee(req map[string]*CheckFeeRequest) (err error) {
 	return tools.PostJsonFor(c.address+"/newcheckfee", req, &req)
 }
+
+type GetFeeRequest struct {
+	SrcChainId    uint64
+	DstChainId    uint64
+	SwapTokenHash string
+	Hash          string
+}
+
+type GetFeeResponse struct {
+	SrcChainId               uint64
+	DstChainId               uint64
+	SwapTokenHash            string
+	TokenAmount              string
+	UsdtAmount               string
+	TokenAmountWithPrecision string
+	Balance                  string
+	BalanceWithPrecision     string
+}
+
+func (c *Client) GetFee(req *GetFeeRequest) (res *GetFeeResponse, err error) {
+	res = new(GetFeeResponse)
+	err = tools.PostJsonFor(c.address+"/getfee", req, res)
+	if err != nil {
+		return nil, err
+	}
+	return
+}
diff --git a/chains/bridge/tx.go b/chains/bridge/tx.go
index d8d4b02..d20ac8f 100644
--- a/chains/bridge/tx.go
+++ b/chains/bridge/tx.go
@@ -48,6 +48,17 @@ type CheckTxResponse struct {
 	}
 }
 
+type TxBody struct {
+	Chainid uint64
+	Txhash  string
+}
+
+type TxResponse struct {
+	Fchaintx *TxBody
+	Mchaintx *TxBody
+	Tchaintx *TxBody
+}
+
 func (c *Client) CheckTx(req *CheckTxRequest) (res *CheckTxResponse, err error) {
 	res = new(CheckTxResponse)
 	err = tools.PostJsonFor(c.address+"/transactionofhash", req, res)
@@ -56,3 +67,12 @@ func (c *Client) CheckTx(req *CheckTxRequest) (res *CheckTxResponse, err error)
 	}
 	return
 }
+
+func (c *Client) FetchTx(req *CheckTxRequest) (res *TxResponse, err error) {
+	res = new(TxResponse)
+	err = tools.GetJsonFor(c.explorer+"/getcrosstx?txhash="+req.Hash, res)
+	if err != nil {
+		res = nil
+	}
+	return
+}
diff --git a/tools/ding.go b/tools/ding.go
index 952692a..0b4a1ad 100644
--- a/tools/ding.go
+++ b/tools/ding.go
@@ -129,3 +129,26 @@ func PostJsonFor(url string, payload interface{}, result interface{}) error {
 	}
 	return nil
 }
+
+func GetJsonFor(url string, result interface{}) error {
+	req, err := http.NewRequest("GET", url, nil)
+	req.Header.Set("Content-Type", "application/json")
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	respBody, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return err
+	}
+	err = json.Unmarshal(respBody, result)
+	if err != nil {
+		log.Error("GetJson response", "url", url, "Body", string(respBody))
+	} else {
+		log.Debug("GetJson response", "url", url, "Body", string(respBody))
+	}
+	return nil
+}
diff --git a/wallet/wallet.go b/wallet/wallet.go
index 478f5fd..171cae4 100644
--- a/wallet/wallet.go
+++ b/wallet/wallet.go
@@ -164,7 +164,7 @@ func (w *Wallet) SendWithAccount(account accounts.Account, addr common.Address,
 		return
 	}
 	if gasLimit == 0 {
-		msg := ethereum.CallMsg{From: account.Address, To: &addr, GasPrice: gasPrice, Value: big.NewInt(0), Data: data}
+		msg := ethereum.CallMsg{From: account.Address, To: &addr, GasPrice: gasPrice, Value: amount, Data: data}
 		gasLimit, err = w.sdk.Node().EstimateGas(context.Background(), msg)
 		if err != nil {
 			nonces.Update(false)