pkg/exchange: add query open orders

pkg/exchange/okex/convert.go

@@ -149,6 +149,49 @@ func toGlobalTrades(orderDetails []okexapi.OrderDetails) ([]types.Trade, error)
 	return trades, nil
 }
 
+func openOrderToGlobal(order *okexapi.OpenOrder) (*types.Order, error) {
+	side := toGlobalSide(order.Side)
+
+	orderType, err := toGlobalOrderType(order.OrderType)
+	if err != nil {
+		return nil, err
+	}
+
+	timeInForce := types.TimeInForceGTC
+	switch order.OrderType {
+	case okexapi.OrderTypeFOK:
+		timeInForce = types.TimeInForceFOK
+	case okexapi.OrderTypeIOC:
+		timeInForce = types.TimeInForceIOC
+	}
+
+	orderStatus, err := toGlobalOrderStatus(order.State)
+	if err != nil {
+		return nil, err
+	}
+
+	return &types.Order{
+		SubmitOrder: types.SubmitOrder{
+			ClientOrderID: order.ClientOrderId,
+			Symbol:        toGlobalSymbol(order.InstrumentID),
+			Side:          side,
+			Type:          orderType,
+			Price:         order.Price,
+			Quantity:      order.Size,
+			TimeInForce:   timeInForce,
+		},
+		Exchange:         types.ExchangeOKEx,
+		OrderID:          uint64(order.OrderId),
+		UUID:             strconv.FormatInt(int64(order.OrderId), 10),
+		Status:           orderStatus,
+		OriginalStatus:   string(order.State),
+		ExecutedQuantity: order.AccumulatedFillSize,
+		IsWorking:        order.State.IsWorking(),
+		CreationTime:     types.Time(order.CreatedTime),
+		UpdateTime:       types.Time(order.UpdatedTime),
+	}, nil
+}
+
 func toGlobalOrders(orderDetails []okexapi.OrderDetails) ([]types.Order, error) {
 	var orders []types.Order
 	var err error

pkg/exchange/okex/convert_test.go

@@ -0,0 +1,84 @@
+package okex
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/c9s/bbgo/pkg/exchange/okex/okexapi"
+	"github.com/c9s/bbgo/pkg/fixedpoint"
+	"github.com/c9s/bbgo/pkg/types"
+)
+
+func Test_openOrderToGlobal(t *testing.T) {
+	var (
+		assert = assert.New(t)
+
+		orderId = 665576973905014786
+		// {"accFillSz":"0","algoClOrdId":"","algoId":"","attachAlgoClOrdId":"","attachAlgoOrds":[],"avgPx":"","cTime":"1704957916401","cancelSource":"","cancelSourceReason":"","category":"normal","ccy":"","clOrdId":"","fee":"0","feeCcy":"USDT","fillPx":"","fillSz":"0","fillTime":"","instId":"BTC-USDT","instType":"SPOT","lever":"","ordId":"665576973905014786","ordType":"limit","pnl":"0","posSide":"net","px":"48174.5","pxType":"","pxUsd":"","pxVol":"","quickMgnType":"","rebate":"0","rebateCcy":"BTC","reduceOnly":"false","side":"sell","slOrdPx":"","slTriggerPx":"","slTriggerPxType":"","source":"","state":"live","stpId":"","stpMode":"","sz":"0.00001","tag":"","tdMode":"cash","tgtCcy":"","tpOrdPx":"","tpTriggerPx":"","tpTriggerPxType":"","tradeId":"","uTime":"1704957916401"}
+		openOrder = &okexapi.OpenOrder{
+			AccumulatedFillSize: fixedpoint.NewFromFloat(0),
+			AvgPrice:            fixedpoint.NewFromFloat(0),
+			CreatedTime:         types.NewMillisecondTimestampFromInt(1704957916401),
+			Category:            "normal",
+			Currency:            "BTC",
+			ClientOrderId:       "",
+			Fee:                 fixedpoint.Zero,
+			FeeCurrency:         "USDT",
+			FillTime:            types.NewMillisecondTimestampFromInt(0),
+			InstrumentID:        "BTC-USDT",
+			InstrumentType:      okexapi.InstrumentTypeSpot,
+			OrderId:             types.StrInt64(orderId),
+			OrderType:           okexapi.OrderTypeLimit,
+			Price:               fixedpoint.NewFromFloat(48174.5),
+			Side:                okexapi.SideTypeBuy,
+			State:               okexapi.OrderStateLive,
+			Size:                fixedpoint.NewFromFloat(0.00001),
+			UpdatedTime:         types.NewMillisecondTimestampFromInt(1704957916401),
+		}
+		expOrder = &types.Order{
+			SubmitOrder: types.SubmitOrder{
+				ClientOrderID: openOrder.ClientOrderId,
+				Symbol:        toGlobalSymbol(openOrder.InstrumentID),
+				Side:          types.SideTypeBuy,
+				Type:          types.OrderTypeLimit,
+				Quantity:      fixedpoint.NewFromFloat(0.00001),
+				Price:         fixedpoint.NewFromFloat(48174.5),
+				AveragePrice:  fixedpoint.Zero,
+				StopPrice:     fixedpoint.Zero,
+				TimeInForce:   types.TimeInForceGTC,
+			},
+			Exchange:         types.ExchangeOKEx,
+			OrderID:          uint64(orderId),
+			UUID:             fmt.Sprintf("%d", orderId),
+			Status:           types.OrderStatusNew,
+			OriginalStatus:   string(okexapi.OrderStateLive),
+			ExecutedQuantity: fixedpoint.Zero,
+			IsWorking:        true,
+			CreationTime:     types.Time(types.NewMillisecondTimestampFromInt(1704957916401).Time()),
+			UpdateTime:       types.Time(types.NewMillisecondTimestampFromInt(1704957916401).Time()),
+		}
+	)
+
+	t.Run("succeeds", func(t *testing.T) {
+		order, err := openOrderToGlobal(openOrder)
+		assert.NoError(err)
+		assert.Equal(expOrder, order)
+	})
+
+	t.Run("unexpected order status", func(t *testing.T) {
+		newOrder := *openOrder
+		newOrder.State = "xxx"
+		_, err := openOrderToGlobal(&newOrder)
+		assert.ErrorContains(err, "xxx")
+	})
+
+	t.Run("unexpected order type", func(t *testing.T) {
+		newOrder := *openOrder
+		newOrder.OrderType = "xxx"
+		_, err := openOrderToGlobal(&newOrder)
+		assert.ErrorContains(err, "xxx")
+	})
+
+}

pkg/exchange/okex/exchange.go

@@ -30,15 +30,15 @@ var (
 	queryAccountLimiter     = rate.NewLimiter(rate.Every(200*time.Millisecond), 5)
 	placeOrderLimiter       = rate.NewLimiter(rate.Every(30*time.Millisecond), 30)
 	batchCancelOrderLimiter = rate.NewLimiter(rate.Every(5*time.Millisecond), 200)
+	queryOpenOrderLimiter   = rate.NewLimiter(rate.Every(30*time.Millisecond), 30)
 )
 
-const ID = "okex"
-
-// PlatformToken is the platform currency of OKEx, pre-allocate static string here
-const PlatformToken = "OKB"
-
 const (
-	// Constant For query limit
+	ID = "okex"
+
+	// PlatformToken is the platform currency of OKEx, pre-allocate static string here
+	PlatformToken = "OKB"
+
 	defaultQueryLimit = 100
 )
 
@@ -295,15 +295,46 @@ func (e *Exchange) SubmitOrder(ctx context.Context, order types.SubmitOrder) (*t
 	*/
 }
 
+// QueryOpenOrders retrieves the pending orders. The data returned is ordered by createdTime, and we utilized the
+// `After` parameter to acquire all orders.
 func (e *Exchange) QueryOpenOrders(ctx context.Context, symbol string) (orders []types.Order, err error) {
 	instrumentID := toLocalSymbol(symbol)
-	req := e.client.NewGetPendingOrderRequest().InstrumentType(okexapi.InstrumentTypeSpot).InstrumentID(instrumentID)
+
-	orderDetails, err := req.Do(ctx)
+	nextCursor := int64(0)
-	if err != nil {
+	for {
-		return orders, err
+		if err := queryOpenOrderLimiter.Wait(ctx); err != nil {
+			return nil, fmt.Errorf("query open orders rate limiter wait error: %w", err)
+		}
+
+		req := e.client.NewGetOpenOrdersRequest().
+			InstrumentID(instrumentID).
+			After(strconv.FormatInt(nextCursor, 10))
+		openOrders, err := req.Do(ctx)
+		if err != nil {
+			return nil, fmt.Errorf("failed to query open orders: %w", err)
+		}
+
+		for _, o := range openOrders {
+			o, err := openOrderToGlobal(&o)
+			if err != nil {
+				return nil, fmt.Errorf("failed to convert order, err: %v", err)
+			}
+
+			orders = append(orders, *o)
+		}
+
+		orderLen := len(openOrders)
+		// a defensive programming to ensure the length of order response is expected.
+		if orderLen > defaultQueryLimit {
+			return nil, fmt.Errorf("unexpected open orders length %d", orderLen)
+		}
+
+		if orderLen < defaultQueryLimit {
+			break
+		}
+		nextCursor = int64(openOrders[orderLen-1].OrderId)
 	}
 
-	orders, err = toGlobalOrders(orderDetails)
 	return orders, err
 }
 

pkg/exchange/okex/okexapi/client.go

@@ -58,6 +58,10 @@ const (
 	OrderStateFilled          OrderState = "filled"
 )
 
+func (o OrderState) IsWorking() bool {
+	return o == OrderStateLive || o == OrderStatePartiallyFilled
+}
+
 type RestClient struct {
 	requestgen.BaseAPIClient
 

pkg/exchange/okex/okexapi/client_test.go

@@ -140,6 +140,26 @@ func TestClient_CancelOrderRequest(t *testing.T) {
 	t.Log(cancelResp)
 }
 
+func TestClient_OpenOrdersRequest(t *testing.T) {
+	client := getTestClientOrSkip(t)
+	ctx := context.Background()
+
+	orders := []OpenOrder{}
+	beforeId := int64(0)
+	for {
+		c := client.NewGetOpenOrdersRequest().InstrumentID("BTC-USDT").Limit("1").After(fmt.Sprintf("%d", beforeId))
+		res, err := c.Do(ctx)
+		assert.NoError(t, err)
+		if len(res) != 1 {
+			break
+		}
+		orders = append(orders, res...)
+		beforeId = int64(res[0].OrderId)
+	}
+
+	t.Log(orders)
+}
+
 func TestClient_BatchCancelOrderRequest(t *testing.T) {
 	client := getTestClientOrSkip(t)
 	ctx := context.Background()
@@ -170,21 +190,6 @@ func TestClient_BatchCancelOrderRequest(t *testing.T) {
 	t.Log(cancelResp)
 }
 
-func TestClient_GetPendingOrderRequest(t *testing.T) {
-	client := getTestClientOrSkip(t)
-	ctx := context.Background()
-	req := client.NewGetPendingOrderRequest()
-	odr_type := []string{string(OrderTypeLimit), string(OrderTypeIOC)}
-
-	pending_order, err := req.
-		InstrumentID("BTC-USDT").
-		OrderTypes(odr_type).
-		Do(ctx)
-	assert.NoError(t, err)
-	assert.NotEmpty(t, pending_order)
-	t.Logf("pending order: %+v", pending_order)
-}
-
 func TestClient_GetOrderDetailsRequest(t *testing.T) {
 	client := getTestClientOrSkip(t)
 	ctx := context.Background()

pkg/exchange/okex/okexapi/get_open_orders_request.go

@@ -0,0 +1,112 @@
+package okexapi
+
+import (
+	"time"
+
+	"github.com/c9s/requestgen"
+
+	"github.com/c9s/bbgo/pkg/fixedpoint"
+	"github.com/c9s/bbgo/pkg/types"
+)
+
+//go:generate -command GetRequest requestgen -method GET -responseType .APIResponse -responseDataField Data
+//go:generate -command PostRequest requestgen -method POST -responseType .APIResponse -responseDataField Data
+
+type OpenOrder struct {
+	AccumulatedFillSize fixedpoint.Value `json:"accFillSz"`
+	// If none is filled, it will return "".
+	AvgPrice      fixedpoint.Value           `json:"avgPx"`
+	CreatedTime   types.MillisecondTimestamp `json:"cTime"`
+	Category      string                     `json:"category"`
+	ClientOrderId string                     `json:"clOrdId"`
+	Fee           fixedpoint.Value           `json:"fee"`
+	FeeCurrency   string                     `json:"feeCcy"`
+	// Last filled time
+	FillTime       types.MillisecondTimestamp `json:"fillTime"`
+	InstrumentID   string                     `json:"instId"`
+	InstrumentType InstrumentType             `json:"instType"`
+	OrderId        types.StrInt64             `json:"ordId"`
+	OrderType      OrderType                  `json:"ordType"`
+	Price          fixedpoint.Value           `json:"px"`
+	Side           SideType                   `json:"side"`
+	State          OrderState                 `json:"state"`
+	Size           fixedpoint.Value           `json:"sz"`
+	TargetCurrency string                     `json:"tgtCcy"`
+	UpdatedTime    types.MillisecondTimestamp `json:"uTime"`
+
+	// Margin currency
+	// Only applicable to cross MARGIN orders in Single-currency margin.
+	Currency string `json:"ccy"`
+	TradeId  string `json:"tradeId"`
+	// Last filled price
+	FillPrice fixedpoint.Value `json:"fillPx"`
+	// Last filled quantity
+	FillSize fixedpoint.Value `json:"fillSz"`
+	// Leverage, from 0.01 to 125.
+	// Only applicable to MARGIN/FUTURES/SWAP
+	Lever string `json:"lever"`
+	// Profit and loss, Applicable to orders which have a trade and aim to close position. It always is 0 in other conditions
+	Pnl          fixedpoint.Value `json:"pnl"`
+	PositionSide string           `json:"posSide"`
+	// Options price in USDOnly applicable to options; return "" for other instrument types
+	PriceUsd fixedpoint.Value `json:"pxUsd"`
+	// Implied volatility of the options orderOnly applicable to options; return "" for other instrument types
+	PriceVol fixedpoint.Value `json:"pxVol"`
+	// Price type of options
+	PriceType string `json:"pxType"`
+	// Rebate amount, only applicable to spot and margin, the reward of placing orders from the platform (rebate)
+	// given to user who has reached the specified trading level. If there is no rebate, this field is "".
+	Rebate    fixedpoint.Value `json:"rebate"`
+	RebateCcy string           `json:"rebateCcy"`
+	// Client-supplied Algo ID when placing order attaching TP/SL.
+	AttachAlgoClOrdId string           `json:"attachAlgoClOrdId"`
+	SlOrdPx           fixedpoint.Value `json:"slOrdPx"`
+	SlTriggerPx       fixedpoint.Value `json:"slTriggerPx"`
+	SlTriggerPxType   string           `json:"slTriggerPxType"`
+	AttachAlgoOrds    []interface{}    `json:"attachAlgoOrds"`
+	Source            string           `json:"source"`
+	// Self trade prevention ID. Return "" if self trade prevention is not applicable
+	StpId string `json:"stpId"`
+	// Self trade prevention mode. Return "" if self trade prevention is not applicable
+	StpMode         string           `json:"stpMode"`
+	Tag             string           `json:"tag"`
+	TradeMode       string           `json:"tdMode"`
+	TpOrdPx         fixedpoint.Value `json:"tpOrdPx"`
+	TpTriggerPx     fixedpoint.Value `json:"tpTriggerPx"`
+	TpTriggerPxType string           `json:"tpTriggerPxType"`
+	ReduceOnly      string           `json:"reduceOnly"`
+	QuickMgnType    string           `json:"quickMgnType"`
+	AlgoClOrdId     string           `json:"algoClOrdId"`
+	AlgoId          string           `json:"algoId"`
+}
+
+//go:generate GetRequest -url "/api/v5/trade/orders-pending" -type GetOpenOrdersRequest -responseDataType []OpenOrder
+type GetOpenOrdersRequest struct {
+	client requestgen.AuthenticatedAPIClient
+
+	instrumentID *string `param:"instId,query"`
+
+	instrumentType InstrumentType `param:"instType,query"`
+
+	orderType *OrderType `param:"ordType,query"`
+
+	state    *OrderState `param:"state,query"`
+	category *string     `param:"category,query"`
+	// Pagination of data to return records earlier than the requested ordId
+	after *string `param:"after,query"`
+	// Pagination of data to return records newer than the requested ordId
+	before *string `param:"before,query"`
+	// Filter with a begin timestamp. Unix timestamp format in milliseconds, e.g. 1597026383085
+	begin *time.Time `param:"begin,query"`
+
+	// Filter with an end timestamp. Unix timestamp format in milliseconds, e.g. 1597026383085
+	end   *time.Time `param:"end,query"`
+	limit *string    `param:"limit,query"`
+}
+
+func (c *RestClient) NewGetOpenOrdersRequest() *GetOpenOrdersRequest {
+	return &GetOpenOrdersRequest{
+		client:         c,
+		instrumentType: InstrumentTypeSpot,
+	}
+}

pkg/exchange/okex/okexapi/get_open_orders_request_requestgen.go

@@ -0,0 +1,321 @@
+// Code generated by "requestgen -method GET -responseType .APIResponse -responseDataField Data -url /api/v5/trade/orders-pending -type GetOpenOrdersRequest -responseDataType []OpenOrder"; DO NOT EDIT.
+
+package okexapi
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/url"
+	"reflect"
+	"regexp"
+	"time"
+)
+
+func (g *GetOpenOrdersRequest) InstrumentID(instrumentID string) *GetOpenOrdersRequest {
+	g.instrumentID = &instrumentID
+	return g
+}
+
+func (g *GetOpenOrdersRequest) InstrumentType(instrumentType InstrumentType) *GetOpenOrdersRequest {
+	g.instrumentType = instrumentType
+	return g
+}
+
+func (g *GetOpenOrdersRequest) OrderType(orderType OrderType) *GetOpenOrdersRequest {
+	g.orderType = &orderType
+	return g
+}
+
+func (g *GetOpenOrdersRequest) State(state OrderState) *GetOpenOrdersRequest {
+	g.state = &state
+	return g
+}
+
+func (g *GetOpenOrdersRequest) Category(category string) *GetOpenOrdersRequest {
+	g.category = &category
+	return g
+}
+
+func (g *GetOpenOrdersRequest) After(after string) *GetOpenOrdersRequest {
+	g.after = &after
+	return g
+}
+
+func (g *GetOpenOrdersRequest) Before(before string) *GetOpenOrdersRequest {
+	g.before = &before
+	return g
+}
+
+func (g *GetOpenOrdersRequest) Begin(begin time.Time) *GetOpenOrdersRequest {
+	g.begin = &begin
+	return g
+}
+
+func (g *GetOpenOrdersRequest) End(end time.Time) *GetOpenOrdersRequest {
+	g.end = &end
+	return g
+}
+
+func (g *GetOpenOrdersRequest) Limit(limit string) *GetOpenOrdersRequest {
+	g.limit = &limit
+	return g
+}
+
+// GetQueryParameters builds and checks the query parameters and returns url.Values
+func (g *GetOpenOrdersRequest) GetQueryParameters() (url.Values, error) {
+	var params = map[string]interface{}{}
+	// check instrumentID field -> json key instId
+	if g.instrumentID != nil {
+		instrumentID := *g.instrumentID
+
+		// assign parameter of instrumentID
+		params["instId"] = instrumentID
+	} else {
+	}
+	// check instrumentType field -> json key instType
+	instrumentType := g.instrumentType
+
+	// TEMPLATE check-valid-values
+	switch instrumentType {
+	case InstrumentTypeSpot, InstrumentTypeSwap, InstrumentTypeFutures, InstrumentTypeOption, InstrumentTypeMARGIN:
+		params["instType"] = instrumentType
+
+	default:
+		return nil, fmt.Errorf("instType value %v is invalid", instrumentType)
+
+	}
+	// END TEMPLATE check-valid-values
+
+	// assign parameter of instrumentType
+	params["instType"] = instrumentType
+	// check orderType field -> json key ordType
+	if g.orderType != nil {
+		orderType := *g.orderType
+
+		// TEMPLATE check-valid-values
+		switch orderType {
+		case OrderTypeMarket, OrderTypeLimit, OrderTypePostOnly, OrderTypeFOK, OrderTypeIOC:
+			params["ordType"] = orderType
+
+		default:
+			return nil, fmt.Errorf("ordType value %v is invalid", orderType)
+
+		}
+		// END TEMPLATE check-valid-values
+
+		// assign parameter of orderType
+		params["ordType"] = orderType
+	} else {
+	}
+	// check state field -> json key state
+	if g.state != nil {
+		state := *g.state
+
+		// TEMPLATE check-valid-values
+		switch state {
+		case OrderStateCanceled, OrderStateLive, OrderStatePartiallyFilled, OrderStateFilled:
+			params["state"] = state
+
+		default:
+			return nil, fmt.Errorf("state value %v is invalid", state)
+
+		}
+		// END TEMPLATE check-valid-values
+
+		// assign parameter of state
+		params["state"] = state
+	} else {
+	}
+	// check category field -> json key category
+	if g.category != nil {
+		category := *g.category
+
+		// assign parameter of category
+		params["category"] = category
+	} else {
+	}
+	// check after field -> json key after
+	if g.after != nil {
+		after := *g.after
+
+		// assign parameter of after
+		params["after"] = after
+	} else {
+	}
+	// check before field -> json key before
+	if g.before != nil {
+		before := *g.before
+
+		// assign parameter of before
+		params["before"] = before
+	} else {
+	}
+	// check begin field -> json key begin
+	if g.begin != nil {
+		begin := *g.begin
+
+		// assign parameter of begin
+		params["begin"] = begin
+	} else {
+	}
+	// check end field -> json key end
+	if g.end != nil {
+		end := *g.end
+
+		// assign parameter of end
+		params["end"] = end
+	} else {
+	}
+	// check limit field -> json key limit
+	if g.limit != nil {
+		limit := *g.limit
+
+		// assign parameter of limit
+		params["limit"] = limit
+	} else {
+	}
+
+	query := url.Values{}
+	for _k, _v := range params {
+		query.Add(_k, fmt.Sprintf("%v", _v))
+	}
+
+	return query, nil
+}
+
+// GetParameters builds and checks the parameters and return the result in a map object
+func (g *GetOpenOrdersRequest) GetParameters() (map[string]interface{}, error) {
+	var params = map[string]interface{}{}
+
+	return params, nil
+}
+
+// GetParametersQuery converts the parameters from GetParameters into the url.Values format
+func (g *GetOpenOrdersRequest) GetParametersQuery() (url.Values, error) {
+	query := url.Values{}
+
+	params, err := g.GetParameters()
+	if err != nil {
+		return query, err
+	}
+
+	for _k, _v := range params {
+		if g.isVarSlice(_v) {
+			g.iterateSlice(_v, func(it interface{}) {
+				query.Add(_k+"[]", fmt.Sprintf("%v", it))
+			})
+		} else {
+			query.Add(_k, fmt.Sprintf("%v", _v))
+		}
+	}
+
+	return query, nil
+}
+
+// GetParametersJSON converts the parameters from GetParameters into the JSON format
+func (g *GetOpenOrdersRequest) GetParametersJSON() ([]byte, error) {
+	params, err := g.GetParameters()
+	if err != nil {
+		return nil, err
+	}
+
+	return json.Marshal(params)
+}
+
+// GetSlugParameters builds and checks the slug parameters and return the result in a map object
+func (g *GetOpenOrdersRequest) GetSlugParameters() (map[string]interface{}, error) {
+	var params = map[string]interface{}{}
+
+	return params, nil
+}
+
+func (g *GetOpenOrdersRequest) applySlugsToUrl(url string, slugs map[string]string) string {
+	for _k, _v := range slugs {
+		needleRE := regexp.MustCompile(":" + _k + "\\b")
+		url = needleRE.ReplaceAllString(url, _v)
+	}
+
+	return url
+}
+
+func (g *GetOpenOrdersRequest) iterateSlice(slice interface{}, _f func(it interface{})) {
+	sliceValue := reflect.ValueOf(slice)
+	for _i := 0; _i < sliceValue.Len(); _i++ {
+		it := sliceValue.Index(_i).Interface()
+		_f(it)
+	}
+}
+
+func (g *GetOpenOrdersRequest) isVarSlice(_v interface{}) bool {
+	rt := reflect.TypeOf(_v)
+	switch rt.Kind() {
+	case reflect.Slice:
+		return true
+	}
+	return false
+}
+
+func (g *GetOpenOrdersRequest) GetSlugsMap() (map[string]string, error) {
+	slugs := map[string]string{}
+	params, err := g.GetSlugParameters()
+	if err != nil {
+		return slugs, nil
+	}
+
+	for _k, _v := range params {
+		slugs[_k] = fmt.Sprintf("%v", _v)
+	}
+
+	return slugs, nil
+}
+
+// GetPath returns the request path of the API
+func (g *GetOpenOrdersRequest) GetPath() string {
+	return "/api/v5/trade/orders-pending"
+}
+
+// Do generates the request object and send the request object to the API endpoint
+func (g *GetOpenOrdersRequest) Do(ctx context.Context) ([]OpenOrder, error) {
+
+	// no body params
+	var params interface{}
+	query, err := g.GetQueryParameters()
+	if err != nil {
+		return nil, err
+	}
+
+	var apiURL string
+
+	apiURL = g.GetPath()
+
+	req, err := g.client.NewAuthenticatedRequest(ctx, "GET", apiURL, query, params)
+	if err != nil {
+		return nil, err
+	}
+
+	response, err := g.client.SendRequest(req)
+	if err != nil {
+		return nil, err
+	}
+
+	var apiResponse APIResponse
+	if err := response.DecodeJSON(&apiResponse); err != nil {
+		return nil, err
+	}
+
+	type responseValidator interface {
+		Validate() error
+	}
+	validator, ok := interface{}(apiResponse).(responseValidator)
+	if ok {
+		if err := validator.Validate(); err != nil {
+			return nil, err
+		}
+	}
+	var data []OpenOrder
+	if err := json.Unmarshal(apiResponse.Data, &data); err != nil {
+		return nil, err
+	}
+	return data, nil
+}

pkg/exchange/okex/okexapi/trade.go

@@ -4,11 +4,11 @@ import (
 	"context"
 	"encoding/json"
 	"net/url"
-	"strings"
+
+	"github.com/pkg/errors"
 
 	"github.com/c9s/bbgo/pkg/fixedpoint"
 	"github.com/c9s/bbgo/pkg/types"
-	"github.com/pkg/errors"
 )
 
 func (c *RestClient) NewBatchPlaceOrderRequest() *BatchPlaceOrderRequest {
@@ -29,12 +29,6 @@ func (c *RestClient) NewGetOrderDetailsRequest() *GetOrderDetailsRequest {
 	}
 }
 
-func (c *RestClient) NewGetPendingOrderRequest() *GetPendingOrderRequest {
-	return &GetPendingOrderRequest{
-		client: c,
-	}
-}
-
 func (c *RestClient) NewGetTransactionDetailsRequest() *GetTransactionDetailsRequest {
 	return &GetTransactionDetailsRequest{
 		client: c,
@@ -249,89 +243,6 @@ func (r *GetOrderDetailsRequest) Do(ctx context.Context) (*OrderDetails, error)
 	return &data[0], nil
 }
 
-type GetPendingOrderRequest struct {
-	client *RestClient
-
-	instId *string
-
-	instType *InstrumentType
-
-	orderTypes []string
-
-	state *OrderState
-}
-
-func (r *GetPendingOrderRequest) InstrumentID(instId string) *GetPendingOrderRequest {
-	r.instId = &instId
-	return r
-}
-
-func (r *GetPendingOrderRequest) InstrumentType(instType InstrumentType) *GetPendingOrderRequest {
-	r.instType = &instType
-	return r
-}
-
-func (r *GetPendingOrderRequest) State(state OrderState) *GetPendingOrderRequest {
-	r.state = &state
-	return r
-}
-
-func (r *GetPendingOrderRequest) OrderTypes(orderTypes []string) *GetPendingOrderRequest {
-	r.orderTypes = orderTypes
-	return r
-}
-
-func (r *GetPendingOrderRequest) AddOrderTypes(orderTypes ...string) *GetPendingOrderRequest {
-	r.orderTypes = append(r.orderTypes, orderTypes...)
-	return r
-}
-
-func (r *GetPendingOrderRequest) Parameters() map[string]interface{} {
-	var payload = map[string]interface{}{}
-
-	if r.instId != nil {
-		payload["instId"] = r.instId
-	}
-
-	if r.instType != nil {
-		payload["instType"] = r.instType
-	}
-
-	if r.state != nil {
-		payload["state"] = r.state
-	}
-
-	if len(r.orderTypes) > 0 {
-		payload["ordType"] = strings.Join(r.orderTypes, ",")
-	}
-
-	return payload
-}
-
-func (r *GetPendingOrderRequest) Do(ctx context.Context) ([]OrderDetails, error) {
-	payload := r.Parameters()
-	req, err := r.client.NewAuthenticatedRequest(ctx, "GET", "/api/v5/trade/orders-pending", nil, payload)
-	if err != nil {
-		return nil, err
-	}
-
-	response, err := r.client.SendRequest(req)
-	if err != nil {
-		return nil, err
-	}
-
-	var apiResponse APIResponse
-	if err := response.DecodeJSON(&apiResponse); err != nil {
-		return nil, err
-	}
-	var data []OrderDetails
-	if err := json.Unmarshal(apiResponse.Data, &data); err != nil {
-		return nil, err
-	}
-
-	return data, nil
-}
-
 type GetTransactionDetailsRequest struct {
 	client *RestClient