驗證與簽章機制

X-QF-SIGN: <your_signature>

mchid=ZaMVg12345&txamt=100&txcurrcd=HKD

client_key = abcd1234

mchid=ZaMVg12345&txamt=100&txcurrcd=HKDabcd1234

SHA256("mchid=ZaMVg12345&txamt=100&txcurrcd=HKDabcd1234")

X-QF-SIGN: <generated_signature>

const crypto = require("crypto");

const payload = {
  txamt: "10",
  txcurrcd: "HKD"
};

const key = "client_key_here";

// 排序並組合參數
const ordered = Object.keys(payload)
  .sort()
  .map(k => `${k}=${payload[k]}`)
  .join("&");

// 產生簽章（此範例使用 MD5）
const signature = crypto
  .createHash("md5")
  .update(ordered + key)
  .digest("hex")
  .toUpperCase();

console.log(signature);