Sample code

async function verifyPayment(reference) {
  const res = await fetch(
    `https://server.staging.vestrapay.app/v1/payment/verify/${encodeURIComponent(reference)}`,
    { headers: { "x-api-key": process.env.VESTRAPAY_SECRET_KEY } },
  );
  const body = await res.json();
  if (body.status !== "success") throw new Error(body.error);
  return body.data;
}

const payment = await verifyPayment(reference);
if (payment.status === "success" && payment.amount === expectedAmount) {
  // fulfill the order once
}

import os, requests

def verify_payment(reference: str) -> dict:
    res = requests.get(
        f"https://server.staging.vestrapay.app/v1/payment/verify/{reference}",
        headers={"x-api-key": os.environ["VESTRAPAY_SECRET_KEY"]},
        timeout=15,
    )
    body = res.json()
    if body.get("status") != "success":
        raise RuntimeError(body.get("error"))
    return body["data"]

function vestrapay_verify(string $reference): array {
  $ch = curl_init("https://server.staging.vestrapay.app/v1/payment/verify/" . rawurlencode($reference));
  curl_setopt_array($ch, [
    CURLOPT_HTTPHEADER => ["x-api-key: " . getenv("VESTRAPAY_SECRET_KEY")],
    CURLOPT_RETURNTRANSFER => true,
  ]);
  $body = json_decode(curl_exec($ch), true);
  if (($body["status"] ?? "") !== "success") {
    throw new RuntimeException($body["error"] ?? "verify_failed");
  }
  return $body["data"];
}