Fixes adshao#615 (AmountToLotSize works incorrect)

Add `page` parameter to `GetIncomeHistoryService`

v2/common/helpers.go

@@ -1,11 +1,22 @@
 package common
 
-import "math"
-import "bytes"
+import (
+	"bytes"
+	"math"
+)
 
-// AmountToLotSize converts an amount to a lot sized amount
-func AmountToLotSize(lot float64, precision int, amount float64) float64 {
-	return math.Trunc(math.Floor(amount/lot)*lot*math.Pow10(precision)) / math.Pow10(precision)
+// RoundPriceToTickSize rounds the price to the nearest tick size
+func RoundPriceToTickSize(price, tickSize float64) float64 {
+	if tickSize == 0 {
+		return price // To avoid division by zero
+	}
+	// Calculate the factor by which to multiply and divide the price to conform to the tick size.
+	factor := 1 / tickSize
+
+	// Round the price to the nearest tick size.
+	roundedPrice := math.Round(price*factor) / factor
+
+	return roundedPrice
 }
 
 // ToJSONList convert v to json list if v is a map

v2/common/helpers_test.go

@@ -36,6 +36,15 @@ func TestAmountToLotSize(t *testing.T) {
 			},
 			want: 1.389,
 		},
+		{
+			name: "test MEW",
+			args: args{
+				lot:       0.0000010,
+				precision: 7,
+				amount:    0.003923153000000002,
+			},
+			want: 0.003923,
+		},
 		{
 			name: "test with big decimal",
 			args: args{
@@ -57,7 +66,7 @@ func TestAmountToLotSize(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			assert.Equal(tt.want, AmountToLotSize(tt.args.lot, tt.args.precision, tt.args.amount))
+			assert.Equal(tt.want, RoundPriceToTickSize(tt.args.amount, tt.args.lot))
 		})
 	}
 }

v2/futures/income_history.go

@@ -13,6 +13,7 @@ type GetIncomeHistoryService struct {
 	incomeType string
 	startTime  *int64
 	endTime    *int64
+	page       *int64
 	limit      *int64
 }
 
@@ -46,6 +47,12 @@ func (s *GetIncomeHistoryService) Limit(limit int64) *GetIncomeHistoryService {
 	return s
 }
 
+// Page set page
+func (s *GetIncomeHistoryService) Page(page int64) *GetIncomeHistoryService {
+	s.page = &page
+	return s
+}
+
 // Do send request
 func (s *GetIncomeHistoryService) Do(ctx context.Context, opts ...RequestOption) (res []*IncomeHistory, err error) {
 	r := &request{
@@ -63,6 +70,9 @@ func (s *GetIncomeHistoryService) Do(ctx context.Context, opts ...RequestOption)
 	if s.endTime != nil {
 		r.setParam("endTime", *s.endTime)
 	}
+	if s.page != nil {
+		r.setParam("page", *s.page)
+	}
 	if s.limit != nil {
 		r.setParam("limit", *s.limit)
 	}