hanayo/modules/btcconversions/btcconversions.go

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2019-02-23 13:29:15 +00:00
package btcconversions
import (
"fmt"
"net/http"
"time"
"encoding/json"
"github.com/gin-gonic/gin"
)
var rates = struct {
EUR float64
USD float64
}{
// 15m values fetched from blockchain ticker on 2017-02-25
1118.33,
1180.4,
}
// GetRates returns the bitcoin rates as JSON.
func GetRates(c *gin.Context) {
c.JSON(200, rates)
}
func init() {
go func() {
for {
updateRates()
time.Sleep(time.Hour)
}
}()
}
type blockchainCurrency struct {
// The X is necessary a) to make this exported b) because an identifier
// can't start with a number.
X15m float64 `json:"15m"`
}
func updateRates() {
resp, err := http.Get("https://blockchain.info/ticker")
if err != nil {
fmt.Println(err)
return
}
m := make(map[string]blockchainCurrency)
json.NewDecoder(resp.Body).Decode(&m)
rates.EUR = m["EUR"].X15m
rates.USD = m["USD"].X15m
}