This migration guide should help you replace NOWPayments without carrying over its hidden spread or fragile IPN handling.

1// NOWPayments
2const response = await fetch("https://api.nowpayments.io/v1/payment", {
3  method: "POST",
4  headers: {
5    "x-api-key": "YOUR_NOWPAYMENTS_KEY",
6    "Content-Type": "application/json",
7  },
8  body: JSON.stringify({
9    price_amount: 49.99,
10    price_currency: "usd",
11    pay_currency: "sol",
12    ipn_callback_url: "https://yoursite.com/webhooks",
13    order_id: "order_123",
14  }),
15});
16
17const payment = await response.json();
18// Redirect to: payment.invoice_url

1// Payvra
2import Payvra from "payvra";
3
4const payvraSecretKey = process.env.PAYVRA_SECRET_KEY;
5if (!payvraSecretKey) {
6  throw new Error("Set PAYVRA_SECRET_KEY before running this example.");
7}
8
9const payvra = new Payvra(payvraSecretKey);
10
11const payment = await payvra.payments.create({
12  amount: "49.99",
13  currency: "USDC",
14  chain: "solana",
15  metadata: { orderId: "order_123" },
16});
17
18// Redirect to: payment.checkoutUrl

1// NOWPayments IPN handler
2app.post("/webhooks", (req, res) => {
3  const hmac = crypto
4    .createHmac("sha512", IPN_SECRET)
5    .update(JSON.stringify(sortKeys(req.body)))
6    .digest("hex");
7
8  if (hmac !== req.headers["x-nowpayments-sig"]) {
9    return res.status(401).send("Invalid");
10  }
11
12  const { payment_status, order_id } = req.body;
13  if (payment_status === "finished") {
14    // Mark order paid
15  }
16
17  res.sendStatus(200);
18});

1// Payvra webhook handler
2app.post("/webhooks", (req, res) => {
3  const signature = req.headers["webhook-signature"];
4  const timestamp = req.headers["webhook-timestamp"];
5  const webhookId = req.headers["webhook-id"];
6
7  const signedContent = `${webhookId}.${timestamp}.${req.rawBody}`;
8  const expected = crypto
9    .createHmac("sha256", WEBHOOK_SECRET)
10    .update(signedContent)
11    .digest("base64");
12
13  if (signature !== `v1,${expected}`) {
14    return res.status(401).send("Invalid");
15  }
16
17  const { type, data } = req.body;
18  if (type === "payment.completed") {
19    // Mark order paid - data.metadata.orderId
20  }
21
22  res.sendStatus(200);
23});