feat: implement coinank openapi kline interface (#1275)

- implement kline interface

provider/coinank/kline.go

@@ -0,0 +1,63 @@
+package coinank
+
+import (
+	"context"
+	"encoding/json"
+	"nofx/provider/coinank/coinank_enum"
+	"strconv"
+)
+
+// Kline get kline data ,startTime and size is optional
+func (c *CoinankClient) Kline(ctx context.Context, symbol string, exchange coinank_enum.Exchange,
+	startTime int64, endTime int64,
+	size int, interval coinank_enum.Interval) ([]KlineResult, error) {
+	paramsMap := make(map[string]string, 6)
+	paramsMap["symbol"] = symbol
+	paramsMap["exchange"] = string(exchange)
+	if startTime > 0 {
+		paramsMap["startTime"] = strconv.FormatInt(startTime, 10)
+	}
+	paramsMap["endTime"] = strconv.FormatInt(endTime, 10)
+	if size <= 0 {
+		size = 10
+	}
+	paramsMap["size"] = strconv.Itoa(size)
+	paramsMap["interval"] = string(interval)
+	resp, err := c.Get(ctx, "/api/kline/lists", paramsMap)
+	if err != nil {
+		return nil, err
+	}
+	var result CoinankResponse[[][]float64]
+	err = json.Unmarshal([]byte(resp), &result)
+	if err != nil {
+		return nil, err
+	}
+	if !result.Success {
+		return nil, HttpError
+	}
+	klines := make([]KlineResult, len(result.Data))
+	for i, k := range result.Data {
+		klines[i].StartTime = int64(k[0] + 0.001)
+		klines[i].EndTime = int64(k[1] + 0.001)
+		klines[i].Open = k[2]
+		klines[i].Close = k[3]
+		klines[i].High = k[4]
+		klines[i].Low = k[5]
+		klines[i].Volume = k[6]
+		klines[i].Quantity = k[7]
+		klines[i].Count = k[8]
+	}
+	return klines, nil
+}
+
+type KlineResult struct {
+	StartTime int64   `json:"startTime"`
+	EndTime   int64   `json:"endTime"`
+	Open      float64 `json:"open"`
+	Close     float64 `json:"close"`
+	High      float64 `json:"high"`
+	Low       float64 `json:"low"`
+	Volume    float64 `json:"volume"`
+	Quantity  float64 `json:"quantity"`
+	Count     float64 `json:"count"`
+}

provider/coinank/kline_test.go

@@ -0,0 +1,22 @@
+package coinank
+
+import (
+	"context"
+	"encoding/json"
+	"nofx/provider/coinank/coinank_enum"
+	"testing"
+	"time"
+)
+
+func TestKline(t *testing.T) {
+	client := NewCoinankClient(coinank_enum.MainUrl, TestApikey)
+	resp, err := client.Kline(context.TODO(), "BTCUSDT", coinank_enum.Binance, 0, time.Now().UnixMilli(), 10, coinank_enum.Hour1)
+	if err != nil {
+		t.Error(err)
+	}
+	res, err := json.Marshal(resp)
+	if err != nil {
+		t.Error(err)
+	}
+	t.Logf("%s", res)
+}