Quick Pay

When handling a purchase, top-up, or "pay with Clink" request:

1. Call `match_products` first, and show the merchant, product, price, and currency.
2. Get the user's confirmation of the exact product or top-up amount.
3. Only after confirmation, call `quick_pay` once with `confirmed: true`.
4. Handle purchase authorization, payment methods, and user redirects according to the returned `next_action`.
5. When the result is unknown or the connection is interrupted, call `get_operation`; if you have an order ID, also call `get_clink_order`.
6. Report only the actual payment and order results returned by the server.

async function createQuickPaySession(input: {
  customerEmail: string;
  amount: number;
  currency: string;
}) {
  const response = await fetch(`${API_BASE_URL}/order/payment-session`, {
    method: "POST",
    headers: {
      Authorization: `Bearer ${platformToken}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify(input),
  });
  if (!response.ok) throw new Error(`Quick Pay API failed: ${response.status}`);

  const result = await response.json();
  await paymentSessionStore.save({
    sessionId: result.data.sessionId,
    ...input,
  });
  return result.data;
}

async function getQuickPaySession(sessionId: string) {
  const response = await fetch(
    `${API_BASE_URL}/order/payment-session/${encodeURIComponent(sessionId)}`,
    { headers: { Authorization: `Bearer ${platformToken}` } },
  );
  if (!response.ok) throw new Error(`Quick Pay API failed: ${response.status}`);
  return response.json();
}