HMAC-SHA256: XPayLabs API Authentication Reference

sign = HEX(HMAC-SHA256(JSON.stringify(data), merchant_token))

{
  "sign": "a1b2c3d4e5f6...",
  "timestamp": 1717000000,
  "nonce": "550e8400-e29b-41d4-a716-446655440000",
  "data": {
    "amount": "100.00",
    "symbol": "USDT",
    "chain": "TRON"
  }
}

import crypto from "crypto";

function sortKeys(obj) {
  return Object.keys(obj)
    .sort()
    .reduce((acc, k) => {
      acc[k] = obj[k];
      return acc;
    }, {});
}

function signRequest(data, token) {
  return crypto
    .createHmac("sha256", token)
    .update(JSON.stringify(sortKeys(data)), "utf8")
    .digest("hex");
}

import hmac, hashlib, json

def sign_request(data: dict, token: str) -> str:
    json_str = json.dumps(data, separators=(",", ":"), sort_keys=True)
    return hmac.new(token.encode(), json_str.encode(), hashlib.sha256).hexdigest()

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

public static String signRequest(Object data, String token) throws Exception {
    ObjectMapper mapper = new ObjectMapper();
    mapper.enable(SerializationFeature.ORDER_MAP_ENTRIES_BY_KEYS);
    String json = mapper.writeValueAsString(data);
    Mac mac = Mac.getInstance("HmacSHA256");
    mac.init(new SecretKeySpec(token.getBytes("UTF-8"), "HmacSHA256"));
    byte[] digest = mac.doFinal(json.getBytes("UTF-8"));
    return bytesToHex(digest);
}

import (
    "crypto/hmac"
    "crypto/sha256"
    "encoding/hex"
    "encoding/json"
)

func SignRequest(data interface{}, token string) string {
    jsonBytes, _ := json.Marshal(data)  // compact JSON
    mac := hmac.New(sha256.New, []byte(token))
    mac.Write(jsonBytes)
    return hex.EncodeToString(mac.Sum(nil))
}

{
  "code": 401,
  "msg": "Sign verification failed",
  "data": null
}

sign = HEX(HMAC-SHA256(orderId, merchant_token))