Delivering the product

// PUT /metering/products/{id}/deliverable  -> 422
{ "error_code": "deliverable_not_allowed",
  "message": "Deliverables are only allowed on one_time item products." }

await infi.products.deliverable.save(productId, {
  kind: "link",
  url: "https://yoursite.com/members/guide",
});

import { readFile } from "node:fs/promises";

const bytes = await readFile("./coffee-guide.pdf");

// 1. ask for the signed URL
const { uploadUrl, objectKey } = await infi.products.deliverable.presign(productId, {
  fileName: "coffee-guide.pdf",
  contentType: "application/pdf",
  sizeBytes: bytes.byteLength,
});

// 2. push the bytes to it (PUT, with none of our auth headers)
await fetch(uploadUrl, {
  method: "PUT",
  headers: { "Content-Type": "application/pdf" },
  body: bytes,
});

// 3. register the object on the product
await infi.products.deliverable.save(productId, { kind: "file", objectKey });

const grants = await infi.invoices.deliverable(invoiceId);
// [{ paymentId, token, downloadUrl, emailSentAt, createdAt }]

if (grants.length > 0) {
  showButton(grants[0].downloadUrl);   // your thank-you page
}

GET /pay/{slug}/download/{token}

await infi.products.deliverable.get(productId);       // what is attached today
await infi.products.deliverable.save(productId, {…});  // replaces it
await infi.products.deliverable.delete(productId);     // removes it (idempotent)

import { Infi } from "@beinfi/sdk";
const infi = new Infi({ secretKey: process.env.INFI_SECRET_KEY! });

// once, when registering the product
await infi.products.deliverable.save(productId, {
  kind: "link",
  url: "https://yoursite.com/guide.pdf",
});

// on every sale
const { invoiceId } = await infi.checkout({
  slug,
  productId,
  customer: { externalId: "u_1", email: "buyer@x.com", taxId: "52998224725" },
  idempotencyKey: `sale:${orderId}`,
});

const paid = await infi.pay.waitForPaid({ slug, invoiceId, timeoutMs: 15000 });
if (paid) {
  // Delivery runs AFTER the payment confirms, so the grant appears a moment
  // after `paid`. A single read returns [] and you show a thank-you page with
  // no download. Do the loop.
  let grants = [];
  for (let i = 0; i < 10 && grants.length === 0; i++) {
    grants = await infi.invoices.deliverable(invoiceId);
    if (grants.length === 0) await new Promise((r) => setTimeout(r, 500));
  }
  return { download: grants[0]?.downloadUrl };
}