move providers into providers subdirectory

providers/bitcoin/fiat.go

@@ -0,0 +1,41 @@
+package bitcoin
+
+import (
+	"fmt"
+	"net/http"
+)
+
+// example: https://api.coinconvert.net/convert/btc/cad?amount=1
+const fiatConvertURL = "https://api.coinconvert.net/convert/btc/cad"
+
+type FiatConversion struct {
+	Status string  `json:"status"`
+	BTC    int     `json:"BTC"`
+	CAD    float64 `json:"CAD"`
+}
+
+// BTC to CAD FIAT conversion - accepts an
+// amount in satoshi's and returns a CAD amount * 1000
+func (c *client) ConvertBTCToCAD(amount int) (int, error) {
+	fiatConversion := &FiatConversion{}
+
+	req, err := http.NewRequest("GET", fiatConvertURL+"?amount=1", nil)
+	if err != nil {
+		return 0, fmt.Errorf("failed to create new GET request: %v", err)
+	}
+
+	res, err := c.httpClient.Do(req)
+	if err != nil {
+		return 0, fmt.Errorf("http GET request failed: %v", err)
+	}
+
+	err = c.processResponse(res, fiatConversion)
+	if err != nil {
+		return 0, fmt.Errorf("failed to process response: %v", err)
+	}
+
+	if fiatConversion.Status != "success" {
+		return 0, fmt.Errorf("fiat conversion status was '%s' but expected 'success'", fiatConversion.Status)
+	}
+	return (amount * int(fiatConversion.CAD*1000)) / 100000000, nil // one BTC = one hundred million satoshi's
+}