Rapyd's Go Example

main.go

package main

import (
	"bytes"
	"crypto/hmac"
	"crypto/sha256"
	"encoding/base64"
	"encoding/hex"
	"fmt"
	"io/ioutil"
	"log"
	"math/rand"
	"net/http"
	"strconv"
	"strings"
	"time"
)

var (
	baseURL   = "https://sandboxapi.rapyd.net"
	accessKey = "<YOUR_ACCESS_KEY>"
	secretKey = "<YOUR_SECRET_KEY>"
)

func main() {
	rand.Seed(time.Now().Unix())
	resp, err := request("POST", "/v1/payments", []byte(""))
	if err != nil {
		log.Fatal(err)
	}

	// Unmarshal `resp` into struct...
}

func request(method, path string, body []byte) ([]byte, error) {
	salt := strconv.Itoa(rand.Intn(10000000000))
	timestamp := strconv.FormatInt(time.Now().Unix(), 10)
	toSign := strings.ToLower(method) + path + salt + timestamp + accessKey + secretKey + string(body)
	toSignHmac := hmac.New(sha256.New, []byte(secretKey))
	_, err := toSignHmac.Write([]byte(toSign))
	if err != nil {
		return nil, err
	}

	signature := base64.StdEncoding.EncodeToString([]byte(hex.EncodeToString(toSignHmac.Sum(nil))))
	headers := map[string]string{
		"content-type": "application/json",
		"salt":         salt,
		"signature":    signature,
		"timestamp":    timestamp,
	}

	req, err := http.NewRequest(method, baseURL+path, bytes.NewBuffer(body))
	if err != nil {
		return nil, err
	}

	for k, v := range headers {
		req.Header.Set(k, v)
	}

	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		return nil, err
	}

	defer resp.Body.Close()

	return ioutil.ReadAll(resp.Body)
}