diff --git a/currency.go b/currency.go
index 1d36806..c9834ad 100644
--- a/currency.go
+++ b/currency.go
@@ -30,6 +30,7 @@ func (as *ApiService) Currencies() (*ApiResponse, error) {
 }
 
 // Currency returns the details of the currency.
+// Deprecated: Use CurrencyV2 instead.
 func (as *ApiService) Currency(currency string, chain string) (*ApiResponse, error) {
 	params := map[string]string{}
 	if chain != "" {
@@ -39,6 +40,40 @@ func (as *ApiService) Currency(currency string, chain string) (*ApiResponse, err
 	return as.Call(req)
 }
 
+// ChainsModel Chains Model
+type ChainsModel struct {
+	ChainName         string `json:"chainName"`
+	WithdrawalMinSize string `json:"withdrawalMinSize"`
+	WithdrawalMinFee  string `json:"withdrawalMinFee"`
+	IsWithdrawEnabled bool   `json:"isWithdrawEnabled"`
+	IsDepositEnabled  bool   `json:"isDepositEnabled"`
+	Confirms          int64  `json:"confirms"`
+	ContractAddress   string   `json:"contractAddress"`
+}
+
+// CurrencyV2Model CurrencyV2 Model
+type CurrencyV2Model struct {
+	Name            string         `json:"name"`
+	Currency        string         `json:"currency"`
+	FullName        string         `json:"fullName"`
+	Precision       uint8          `json:"precision"`
+	Confirms        int64          `json:"confirms"`
+	ContractAddress string         `json:"contractAddress"`
+	IsMarginEnabled bool           `json:"isMarginEnabled"`
+	IsDebitEnabled  bool           `json:"isDebitEnabled"`
+	Chains          []*ChainsModel `json:"chains"`
+}
+
+// CurrencyV2 returns the details of the currency.
+func (as *ApiService) CurrencyV2(currency string, chain string) (*ApiResponse, error) {
+	params := map[string]string{}
+	if chain != "" {
+		params["chain"] = chain
+	}
+	req := NewRequest(http.MethodGet, "/api/v2/currencies/"+currency, params)
+	return as.Call(req)
+}
+
 type PricesModel map[string]string
 
 // Prices returns the fiat prices for currency.
diff --git a/currency_test.go b/currency_test.go
index fc0de5c..d9b9f6c 100644
--- a/currency_test.go
+++ b/currency_test.go
@@ -56,6 +56,27 @@ func TestApiService_Currency(t *testing.T) {
 	}
 }
 
+func TestApiService_Currency_V2(t *testing.T) {
+	s := NewApiServiceFromEnv()
+	rsp, err := s.CurrencyV2("BTC", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	c := &CurrencyV2Model{}
+	if err := rsp.ReadData(c); err != nil {
+		t.Fatal(err)
+	}
+	t.Log(ToJsonString(c))
+	switch {
+	case c.Name == "":
+		t.Error("Empty key 'name'")
+	case c.Currency == "":
+		t.Error("Empty key 'currency'")
+	case c.FullName == "":
+		t.Error("Empty key 'fullName'")
+	}
+}
+
 func TestApiService_Prices(t *testing.T) {
 	s := NewApiServiceFromEnv()
 	rsp, err := s.Prices("USD", "BTC,KCS")
diff --git a/order.go b/order.go
index 679b612..0c8876b 100644
--- a/order.go
+++ b/order.go
@@ -19,7 +19,7 @@ type CreateOrderModel struct {
 	Price       string `json:"price,omitempty"`
 	Size        string `json:"size,omitempty"`
 	TimeInForce string `json:"timeInForce,omitempty"`
-	CancelAfter uint64 `json:"cancelAfter,omitempty"`
+	CancelAfter int64 `json:"cancelAfter,omitempty"`
 	PostOnly    bool   `json:"postOnly,omitempty"`
 	Hidden      bool   `json:"hidden,omitempty"`
 	IceBerg     bool   `json:"iceberg,omitempty"`
@@ -113,7 +113,7 @@ type OrderModel struct {
 	Hidden        bool   `json:"hidden"`
 	IceBerg       bool   `json:"iceberg"`
 	VisibleSize   string `json:"visibleSize"`
-	CancelAfter   uint64 `json:"cancelAfter"`
+	CancelAfter   int64 `json:"cancelAfter"`
 	Channel       string `json:"channel"`
 	ClientOid     string `json:"clientOid"`
 	Remark        string `json:"remark"`