metarare_api-main/common/currency.go

package common

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
	"time"
)

type Status struct {
	TimeStamp    time.Time `json:"time_stamp,omitempty"`
	ErrorCode    int       `json:"error_code,omitempty"`
	ErrorMessage string    `json:"error_message,omitempty"`
	Elapsed      int       `json:"elapsed,omitempty"`
	CreditCount  int       `json:"credit_count,omitempty"`
	Notice       int       `json:"notice,omitempty"`
}
type Data struct {
	ID          int       `json:"id,omitempty"`
	Symbol      string    `json:"symbol,omitempty"`
	Name        string    `json:"name,omitempty"`
	Amount      int       `json:"amount,omitempty"`
	LastUpdated time.Time `json:"last_updated,omitempty"`
	Quote       Quote     `json:"quote,omitempty"`
}
type DataList struct {
	Data [1]Data
}
type Quote struct {
	USD PriceSet `json:"usd,omitempty"`
}
type PriceSet struct {
	Price       float32
	LastUpdated time.Time
}

type retSet struct {
	Status Status   `json:"status,omitempty"`
	Data   [10]Data `json:"data,omitempty"`
}

func sendPacket(uri string) retSet {
	var _r retSet
	const headerKey = "X-CMC_PRO_API_KEY"
	const apiKey = "4ef32866-4674-412b-9f7f-743c5a75d05c"
	req, err := http.NewRequest("GET", uri, nil)
	if err != nil {
		panic(err)
	}
	req.Header.Add(headerKey, apiKey)

	_client := &http.Client{}
	resp, err := _client.Do(req)
	if err != nil {
		panic(err)
	}
	bytes, _ := ioutil.ReadAll(resp.Body)
	str := string(bytes) //바이트를 문자열로
	pb := []byte(str)
	fmt.Println(str)
	if err := json.Unmarshal(pb, &_r); err != nil {
		panic(err)
	}

	fmt.Printf("data %+v", _r)
	defer resp.Body.Close()
	return _r
}

func ObtainCurrencyPrice() (float64, float64, float64) {

	var uri = "https://pro-api.coinmarketcap.com/v2/tools/price-conversion"
	mf1_uri := fmt.Sprintf("%s?amount=1&symbol=MF1", uri)

	ret := sendPacket(mf1_uri)
	// mf1 = fmt.Sprintf("%f", ret.Data[0].Quote.USD.Price)
	mf1 := float64(ret.Data[0].Quote.USD.Price)

	mf2_uri := fmt.Sprintf("%s?amount=1&symbol=MF2", uri)
	ret = sendPacket(mf2_uri)
	// mr, _ := strconv.ParseFloat(fmt.Sprintf("%f", ret.Data[0].Quote.USD.Price), 64)
	mr := float64(ret.Data[0].Quote.USD.Price)

	eth_uri := fmt.Sprintf("%s?amount=1&symbol=ETH", uri)
	ret = sendPacket(eth_uri)
	// eth, _ := strconv.ParseFloat(fmt.Sprintf("%f", ret.Data[0].Quote.USD.Price), 64)
	eth := float64(ret.Data[0].Quote.USD.Price)

	return eth, mf1, mr

}