Hosted Checkout

const apiUrl = process.env.TAPAYA_CHECKOUT_API_URL;
const apiKey = process.env.TAPAYA_CHECKOUT_API_KEY;

async function checkoutRequest(path, options = {}) {
	const response = await fetch(new URL(path, apiUrl), {
		...options,
		headers: {
			...options.headers,
			Authorization: `Bearer ${apiKey}`,
		},
		redirect: 'error',
		cache: 'no-store',
		signal: AbortSignal.timeout(8000),
	});

	if (!response.ok) {
		throw new Error(`Checkout request failed (${response.status})`);
	}

	return response.json();
}

const session = await checkoutRequest('/merchant/checkout-sessions', {
	method: 'POST',
	headers: {
		'Content-Type': 'application/json',
		'Idempotency-Key': order.checkoutAttemptKey,
	},
	body: JSON.stringify({
		merchantOrderId: order.id,
		amount: order.totalInMinorUnits,
		currency: order.currency,
		successUrl: 'https://shop.example/checkout/return',
		cancelUrl: 'https://shop.example/checkout/cancel',
	}),
});

const current = await checkoutRequest(
	`/merchant/checkout-sessions/${encodeURIComponent(order.checkoutSessionId)}`,
);

if (
	current.id !== order.checkoutSessionId ||
	current.merchantOrderId !== order.id ||
	current.amount !== order.totalInMinorUnits ||
	current.currency !== order.currency
) {
	throw new Error('Checkout session does not match the order');
}

const paid = current.paymentStatus === 'successful';