1export async function createMomoPayment(amount: number, orderId: string) {
2  const signature = crypto.createHmac('sha256', MOMO_SECRET)
3    .update(`accessKey=${ACCESS_KEY}&amount=${amount}&extraData=&ipnUrl=${IPN_URL}&orderId=${orderId}&orderInfo=${ORDER_INFO}&partnerCode=${PARTNER_CODE}&redirectUrl=${REDIRECT_URL}&requestId=${orderId}&requestType=captureWallet`)
4    .digest('hex');
5
6  const response = await fetch('https://test-payment.momo.vn/v2/gateway/api/create', {
7    method: 'POST',
8    body: JSON.stringify({
9      partnerCode: PARTNER_CODE,
10      requestId: orderId,
11      amount,
12      signature
13    })
14  });
15
16  return response.json();
17}

1const embed_data = { redirecturl: 'https://mysite.com/success' };
2const items = [{ itemid: 'vibes_1', itemname: 'Vietnam Commerce Kit', itemprice: 199000, itemquantity: 1 }];
3const order = {
4  app_id: config.app_id,
5  app_trans_id: `${moment().format('YYMMDD')}_${transID}`,
6  app_user: 'user123',
7  app_time: Date.now(),
8  item: JSON.stringify(items),
9  embed_data: JSON.stringify(embed_data),
10  amount: 50000,
11  description: 'IdeKit Payment #123',
12  bank_code: 'zalopayapp',
13};
14
15const data = config.app_id + '|' + order.app_trans_id + '|' + order.app_user + '|' + order.amount + '|' + order.app_time + '|' + order.embed_data + '|' + order.item;
16order.mac = CryptoJS.HmacSHA256(data, config.key1).toString();