add margin

internal/data/market/margin.go

@@ -0,0 +1,65 @@
+package market
+
+import (
+	"github.com/go-resty/resty/v2"
+	"github.com/rs/zerolog/log"
+	"me.thuanle/bbot/internal/utils/convertx"
+)
+
+// Structs to parse the JSON response
+type MarginInterestResponse struct {
+	Code    string  `json:"code"`
+	Message string  `json:"message"`
+	Data    []Asset `json:"data"`
+}
+
+type Asset struct {
+	AssetName string `json:"assetName"`
+	Specs     []Spec `json:"specs"`
+}
+
+type Spec struct {
+	VipLevel          string `json:"vipLevel"`
+	DailyInterestRate string `json:"dailyInterestRate"`
+}
+
+func (ms *MarketData) GetMarginInterestRates() map[string]float64 {
+	data := fetchMarginInterestRate()
+
+	// Map to store the interest rates for the requested tokens
+	rates := make(map[string]float64)
+
+	// Iterate over the fetched data and match tokens with VIP Level 0 interest rates
+	for _, asset := range data {
+		for _, spec := range asset.Specs {
+			if spec.VipLevel == "0" {
+				rateDaily := convertx.String2Float64(spec.DailyInterestRate, 0)
+				rates[asset.AssetName] = rateDaily
+			}
+		}
+	}
+	return rates
+}
+
+func fetchMarginInterestRate() []Asset {
+	url := "https://www.binance.com/bapi/margin/v1/friendly/margin/vip/spec/list-all"
+
+	// Create a new Resty client
+	client := resty.New()
+
+	// Send the GET request to the API
+	var response MarginInterestResponse
+
+	resp, err := client.R().
+		SetResult(&response).
+		Get(url)
+
+	if err != nil {
+		log.Err(err).
+			Str("status", resp.Status()).
+			Msg("Failed to fetch margin interest rates")
+		return nil
+	}
+
+	return response.Data
+}