🎉 Welcome to Pro!
Your API key:
${escapeHtml(keyInfo.key)}
Save this key! It won't be shown again.
5,000 PDFs/month • All endpoints • Priority support
View API docs →
`);
}
catch (err) {
logger.error({ err }, "Success page error");
res.status(500).json({ error: "Failed to retrieve session" });
}
});
// Stripe webhook for subscription lifecycle events
router.post("/webhook", async (req, res) => {
const sig = req.headers["stripe-signature"];
const webhookSecret = process.env.STRIPE_WEBHOOK_SECRET;
let event;
if (!webhookSecret) {
logger.error("STRIPE_WEBHOOK_SECRET is not configured — refusing to process unverified webhooks");
res.status(500).json({ error: "Webhook signature verification is not configured" });
return;
}
else if (!sig) {
res.status(400).json({ error: "Missing stripe-signature header" });
return;
}
else {
try {
event = getStripe().webhooks.constructEvent(req.body, sig, webhookSecret);
}
catch (err) {
logger.error({ err }, "Webhook signature verification failed");
res.status(400).json({ error: "Invalid signature" });
return;
}
}
switch (event.type) {
case "checkout.session.completed": {
const session = event.data.object;
const customerId = session.customer;
const email = session.customer_details?.email;
// Filter by product — this Stripe account is shared with other projects
try {
const fullSession = await getStripe().checkout.sessions.retrieve(session.id, {
expand: ["line_items"],
});
const lineItems = fullSession.line_items?.data || [];
const hasDocfastProduct = lineItems.some((item) => {
const price = item.price;
const productId = typeof price?.product === "string" ? price.product : price?.product?.id;
return productId === DOCFAST_PRODUCT_ID;
});
if (!hasDocfastProduct) {
logger.info({ sessionId: session.id }, "Ignoring event for different product");
break;
}
}
catch (err) {
logger.error({ err, sessionId: session.id }, "Failed to retrieve session line_items");
break;
}
if (!customerId || !email) {
logger.warn("checkout.session.completed: missing customerId or email, skipping key provisioning");
break;
}
const keyInfo = await createProKey(email, customerId);
provisionedSessions.add(session.id);
logger.info({ email, customerId }, "checkout.session.completed: provisioned pro key");
break;
}
case "customer.subscription.updated": {
const sub = event.data.object;
const customerId = sub.customer;
const shouldDowngrade = sub.status === "canceled" ||
sub.status === "past_due" ||
sub.status === "unpaid" ||
sub.cancel_at_period_end === true;
if (shouldDowngrade) {
if (!(await isDocFastSubscription(sub.id))) {
logger.info({ subscriptionId: sub.id }, "customer.subscription.updated: ignoring event for different product");
break;
}
await downgradeByCustomer(customerId);
logger.info({ customerId, status: sub.status, cancelAtPeriodEnd: sub.cancel_at_period_end }, "customer.subscription.updated: downgraded key to free tier");
}
break;
}
case "customer.subscription.deleted": {
const sub = event.data.object;
const customerId = sub.customer;
if (!(await isDocFastSubscription(sub.id))) {
logger.info({ subscriptionId: sub.id }, "customer.subscription.deleted: ignoring event for different product");
break;
}
await downgradeByCustomer(customerId);
logger.info({ customerId }, "customer.subscription.deleted: downgraded key to free tier");
break;
}
case "customer.updated": {
const customer = event.data.object;
const customerId = customer.id;
const newEmail = customer.email;
if (customerId && newEmail) {
const updated = await updateEmailByCustomer(customerId, newEmail);
if (updated) {
logger.info({ customerId, newEmail }, "Customer email synced from Stripe");
}
}
break;
}
default:
break;
}
res.json({ received: true });
});
// --- Price management ---
let cachedPriceId = null;
async function getOrCreateProPrice() {
if (cachedPriceId)
return cachedPriceId;
const products = await getStripe().products.search({ query: "name:'DocFast Pro'" });
let productId;
if (products.data.length > 0) {
productId = products.data[0].id;
const prices = await getStripe().prices.list({ product: productId, active: true, limit: 1 });
if (prices.data.length > 0) {
cachedPriceId = prices.data[0].id;
return cachedPriceId;
}
}
else {
const product = await getStripe().products.create({
name: "DocFast Pro",
description: "5,000 PDFs / month via API. HTML, Markdown, and URL to PDF.",
});
productId = product.id;
}
const price = await getStripe().prices.create({
product: productId,
unit_amount: 900,
currency: "eur",
recurring: { interval: "month" },
});
cachedPriceId = price.id;
return cachedPriceId;
}
export { router as billingRouter };